Wheel life and its end form
Any grinding wheel has its use of certain wear requirements, wear to a certain extent must be re-replaced with a new wheel. Not in order to save material, the requirements on the use of ultra-wear, which is a very unsafe illegal behavior.
Any grinding wheel has its use of certain wear requirements, wear to a certain extent must be re-replaced with a new wheel. Not in order to save material, the requirements on the use of ultra-wear, which is a very unsafe illegal behavior. General provisions, when the wheel wear to diameter 10mm larger than the chuck should be replaced when the new wheel.
The actual grinding time between grinding wheels is called grinding wheel life. Judging wheel life, generally based on the work surface after the phenomenon of wear and tear to determine the visual phenomenon. The main phenomena are: the process of self-excited grinding vibration, the surface of the workpiece surface regeneration pattern; grinding noise increases; the workpiece surface grinding burns, abrasive sharp increase or decrease; grinding accuracy; grinding surface Roughness increases. These phenomena are mainly due to the grinding temperature is too high to surface thermal damage and due to self-excited vibration caused by the roughness and accuracy decreased.
Grinding wheel end of the form: Grinding wheel surface passivation - grinding state (will increase the grinding force and grinding heat); wheel clogging (prone to vibration or noise to burns); grinding wheel contour damage (processing accuracy).
Any grinding wheel has a certain period of validity, in the validity period, it is qualified grinding wheel; more than the validity of use, not necessarily qualified grinding wheel. The regulation stipulates that "the grinding wheel should be used within the validity period, the resin and rubber bonded wheel must be rotated for one year after storage, and the qualified person can use it".

Conditions for use of diamond grinding wheel

1. Diamond grinding wheel cutting depth according to the thickness and cutting wheel material to determine. General maximum cutting depth of 3 mm;

2. The new sand grinding wheel must be used before the special correction plate to open the edge correction.

 

3. Select diamond grinding wheel, in order to ensure the best cutting results, according to the different blood plasma cutting material to select the appropriate abrasive size wheel.

4. Diamond grinding wheel cutting speed must be greater than 80 m / s;

5. Diamond grinding wheel normal cutting speed (cutting material moving speed) according to the cutting material and cutting accuracy requirements, generally 0.5-200 mm / s;

6. Diamond grinding wheel must be cut with water cooling, cooling water flow of not less than 2.4 l / min;

Grinding wheel dressing tools and dressing conditions have a significant impact on wheel dressing quality, not only affect the grinding wheel shape and sharpness of sharpening, but also affect the grinding wheel wear, grinding force, grinding temperature and the surface integrity of grinding parts . In the actual production, generally based on the accuracy of the workpiece requirements, the nature of the wheel, the workpiece material and processing methods to determine the dressing methods and dressing tools.

    (1) diamond dressing. Diamond dressing is to diamond as a tool, that is, large pieces of diamond inlaid in a special diamond arbor, with the form of cutting to dress wheel method. Dressing wheel, the diamond knife mounted on the grinder in a special dresser, the vertical knife to carry out dressing. As the diamond hardness is very high, sharp edges and corners, grinding wheel can be trimmed correctly and meticulously, can obtain high processing precision and very fine surface roughness. Therefore, it is one of the most commonly used dressing methods.

    With diamond dressing wheel should pay attention to the following matters:

    ① must be a reasonable choice of the size of diamond particles. Diamond size should be based on the size of the wheel to select, under normal circumstances, the wheel diameter of 100mm in the following, optional 0.25 karats of diamond. Diamond wheel diameter of 100mm or more, the election 0.1-1 carat diamond.

    In order to make the dressing of the grinding wheel sharp and smooth, the tip of the diamond must be kept sharp, the tip of the study into 70 ° - 80 ° sharp angle.

    ③ Before and during installation, always check the diamond welding is strong and whether there are cracks, so as not to repair the loss of diamond.

    ④ diamond rod installed in the wheel dresser, the extension of the length to be short, clamping to be strong, so as to avoid jitter when dressing, affecting the quality of finishing.

    ⑤ Diamond and grinding wheel contact point should be lower than the wheel axis 1-2mm, diamond rod upward tilt 10 ° ~ 15 °, while horizontal axis tilted with the wheel 15 ° ~ 30 °, so that when turning the diamond grinding wheel negative Angle and the main angle, the turning effect is better. Diamond must not be mounted on the wheel axis above, otherwise, under the action of grinding force in the diamond tip will pierce the wheel, or in the dressing of the diamond vibration. If the installation is too low, the force is too small, affecting the dressing diamond play a sharp role. At the same time because of the installation angle exists, but also can keep sharp sharp corners of the diamond, such as a direction grind, and for a direction can be used, can improve the service life.

    ⑥ according to processing requirements to determine the amount of repair. Coarse grinding, grinding wheel surface roughness, this can increase the dressing of the depth of the knife and trim the lead. Fine grinding, on the other hand, the smaller the dressing dressing lead, grinding wheel surface repair more smooth, abrasive micro-blade, such as the higher the better. Fine finishing, the general infeed into the horizontal feed 2-3 times, and then in the case of no feeding for several repairs.

    ⑦ dressing should be fully cooled, do not allow intermittent pouring coolant, so as to avoid sudden and cold diamond abrasions, dry grinding dressing, the repair should be paused after a few times, so that the diamond can be cooled.

    (2) diamond pen finishing. Diamond pen is a small particle by the diamond or diamond powder with a strong combination of the alloy together, pressed into the special made of metal arbor. According to the distribution of diamond, there are three types of diamond pen: layered diamond pen - diamond particles layered distribution; chain diamond pen - diamond particles into a chain distribution; powder diamond pen - diamond particles were irregularly distributed .

    There are many factors that affect the dressing quality, such as the edge  shape of the diamond, the wear resistance of the diamond, the dressing parameters (trim feed rate, wheel dressing speed, dressing depth), dresser, wheel characteristics Type, hardness, particle size, texture, binder) and grinding fluid.

The advantages of new temperature resin grinding wheel

The advantages of new temperature-resistant resin grinding wheel The new temperature-resistant resin grinding wheel technology is mainly applied to the following two types of grinding wheel: First, large diameter resin cutting wheel; Second, heavy-duty resin grinding wheel.

More than two major categories of resin grinding wheel is mainly used in modern steel enterprises. Large-diameter resin cutting wheel mainly used in steel production line profiles of iron and steel wire-length cutting; heavy-duty coarse resin grinding wheel is mainly used for steel ingot or rail and other materials, coarse grinding.

As the above two categories of grinding wheels often work under more stringent conditions, requiring such a wheel must have a high temperature performance, can withstand greater load, better grinding characteristics, grinding efficiency is better , Can work in a large line speed conditions, the balance of performance, and more durable. For heavy-duty coarse grinding resin grinding wheel must also have a greater density.

Basics: Wheel of water

After the grinding wheel is produced from the oven, it re-enters a water-filled environment until it is consumed. Wheel of life, is a constant face of water vapor life, but also a constant struggle with the water life. While the abrasive wheel manufacturers are deeply affected by the performance of the headache and it is closely related to attenuation. But in the end is how the matter?

Take a look at the structure of the wheel, see Figure 1.

In the production of the wheel mixer on the pot, our sand for the first time met its long-standing resin solution, began to be firmly wrapped live, their feelings can not be purely disturbed by any third party. In the pot mixer, the other filler, resin powder, active additives (please give this component with more attention) and dyes, where uniform mixing, and then wait on the pot prince and prince.

Once the pot of resin liquid and sand come, the composition of the pot will be evenly wrapped around them. On the pot can not add any other component, is that any other components in the pot on the join, will affect the uniform distribution of materials, resulting in potential stress for the grinding wheel after the distortion of foreshadowed. This is a principle that can not be broken. If the mixture is a problem, it should look for other solutions, the feeding sequence process or should stick to.

Resin solution on the sand package, there is no chemical bond, is a purely physical curing package. Therefore, if the sand can be properly treated with a coupling agent, some chemical bonding can be generated between the resin liquid and the sand, and the bonding strength thereof should be increased. Since the two are physical integration, the intensity is not high, as the fairy tale said, it is easy to get involved in a third party. In this article, this disgraceful third party is water.

To see how the invasion of the third party. Figure II.

Water slowly from the outside invasion, and gradually invade the wheel to the inside, but also invasion of resin liquid film and the gap between the sand. We give this water at different stages of a number: wheel outside the water is 1, the wheel structure within the water is 2, further resin liquid film and sand between the water is 3. You see, it really is a small three.

Water 1, free in the grinding wheel outside, in fact, the impact on the grinding wheel is negligible. Water 2, has entered into the wheel, grinding wheel gap, easy to come out easily, but as a channel, the negative impact is gradually increasing. Damage to the wheel is the largest water 3. Water 3 latent here, in the wheel storage process, it seems that do not see too much problem. But once the wheel starts to work, the water becomes hot water into a huge volume expansion, it's destructive power is very frightening. It will really like a demon, Cuikulaxiu-like resin film from the sand peeling off. Sand quickly fall off, large beads beads falling jade plate generally become a mess, the performance change is the wheel of attenuation. Especially for the ultra-thin, this problem is particularly serious. This damage, but also to the internal wheel of the stress released, resulting in distortion, which is the wheel's warpage. Of course, there are other reasons for grinding wheel warping, such as mixing, such as trapped material, such as oven control, but not discussed in this column.

So to solve this type of problem of the program, it is important how to deal with these three water.

Water 1 treatment, mainly packaging and transportation, should be avoided as much as possible the external environment of water vapor intrusion. Many high-end grinding wheel, all plastic packaging, the reason lies in this.

Water 2 treatment, it is relatively complex.

Specific possible options are:

1, increase the wheel compactness, reduce the gap, to reduce the wheel of the invasion;

2, hot pressing wheel production, need to pay attention to molding;

3, control the use of absorbent materials;

4, select the appropriate resin powder and resin solution to close the possible water vapor intrusion channel;

5, adjust the curing process to close the possible water vapor intrusion channel;

Vapor damage to the wheel of the serious, we look at the wheel head manufacturers to know how much the headache index. Especially in the summer, the climate is hot, water vapor is abundant, put this destructive power completely revealed. Grinding wheel distortion, abrupt decline in wheel performance, the accumulation of customer complaints at the desk, inexplicable sadness in my heart. Is the quality of people in the winter wheel warm, but in the summer people pull psychological pull cool? Yes, that is what we are discussing about the role of this third party, especially Water 3.

The gap between the resin liquid film and the sand is very narrow, and the third person should not be able to easily enter. But the reality is that it does enter, and have a large area of ​​damage. The secret lies in the sand: the resin film on the surface of the sand to attract this third party. At present, the domestic resin solution generally absorb moisture serious, even in such a small gap, it can also attract water 2 into the water 3. Incidentally, advertising is what I have been fighting for 12 years of the United States Han Mori's phenolic resin plant in Zhenjiang put into production, the problem is expected to be essential to improve.

Possible solutions to water 3 are:

1, must first use non-absorbent resin solution;

2, select the appropriate resin solution, so that the surface of the sand film coating integrity;

3, slow cooling, to avoid cracks in the resin liquid film;

4, other solutions see the water 2 solution.

The attenuation problem is so complex that the factors that affect it are so numerous that they can be improved without end. However, the market is so cold, in the case of lower and lower product prices, how can you cut prices? In addition to improving quality, product segmentation, specialization, you have another way to go?

Wheel material knowledge popularization

Speaking of wheel we should not feel strange, yes it is our life the most common kind of abrasive, and according to the different materials to grind, grinding wheel also has a material. As the largest amount of abrasive, the use of the highest frequency of a grinding tool, today Xiaobian to take you to analyze the wheel material and their respective characteristics, which come with Xiao Bian to see it!

What is the wheel

The grinding wheel is made of abrasives and various kinds of abrasives in China. Generally, there is a round hole in the middle. When the motor is started, it can rotate rapidly. It can be used for all kinds of metal and other Materials for processing. Grinding wheel manufacturing process is more complex, generally compacting, drying and other procedures, some materials have to go through the grinding wheel steps, China is the world's first use of tools to kill one of the countries.

Grinding wheel material and their own characteristics

Ceramic grinding wheel
Ceramic grinding wheel is the name suggests is a combination of ceramic produced out of a grinding wheel it is very stable chemical stability, can be sprinkled in the process of cutting fluid processing, or even dry grinding can be. Some of the plane, both inside and outside the grinding wheel can be used to carry out the processing of ceramic grinding wheel.


Resin grinding wheel
This is a combination of resin made of grinding wheel, so it's hardening temperature is low, shrinkage is also very small, so for some special-shaped or special shape of the wheel, resin wheel is the best, however, to know , Resin wheel in heavy duty conditions continue to work, and can maintain a certain flexibility is not changed, is a very practical wheel.

Rubber grinding wheel
Rubber grinding wheel has a very good flexibility, when we want to polish the surface of building materials such as processing, rubber grinding wheel comes in handy, and it can also do centerless grinding wheel, etc., are often used to cut or slot.

Superhard abrasive wheel
The emergence of this "heavyweights" is closely linked with the diamond, there are a lot of cubic nitrogen nitride stretched wheel can also be classified as superhard abrasive wheel, when we want to carry out some alloy steel and Heat-resistant steel and other material cutting, the superhard abrasive wheel has become our best helper.
Said so much, I believe we have a different material of the grinding wheel has a certain understanding, and finally Xiaobian to remind you that due to the use of grinding wheel in the process often use a variety of additives, so we have to fully understand the various materials Of the grinding wheel on the basis of chemical stability and then the choice of grinding wheel, so as to make our project more with less!

CBN grinding wheel process characteristics

发布日期：2016-12-10 13:30:51

IntroductionCBN grinding wheel process characteristics...

1.The use of independent intellectual property rights of superabrasive bonding agent to optimize the formula and the cocoa temperature control of the new technology, successfully resolved the wheel self-sharpening requirements and long-life indicators of contradictions.
2. The use of grinding wheel design and use of its own design and processing of the combination of grinding, grinding wheel and self-developed high-speed rotary test machine to ensure that the quality of product production.

Grinding wheel is mainly used for cylindrical grinder, centerless grinder, internal grinder and a series of tools such as grinding machine, at this stage the main customer base in Zhejiang, Shanghai, Chengdu, Beijing and other large-scale production and processing tool manufacturers, and some precision ceramic processing factory in Juchuang Our long-term partners.

M-tel:  +86-15136439750

WhatsApp:  +86-15136439750

Skype:  jcabrasive@outlook.com

E-mail:  zzabrasive@gmail.com

Address:  Zhengzhou City, Henan province high tech Zone, Dawn Road, No. six

The basic knowledge of grinding wheel
1. The so-called wheel is made of sand with wheels. How is the grinding wheel made, what is the bonding of it? This bonding material is called a binder. The sand particles (abrasive) bonding process, there is no space filled with sand, leaving a certain gap, this gap plays a heat, to accommodate the role of debris, therefore, this gap will enter a certain The amount of air and coolant has a certain benefit for grinding. So, abrasives, voids, binders constitute the three major elements of grinding wheel. In this case,
2, the grinding wheel in the sand chaotic, uneven, can be regarded as tens of millions of knives. After the dressing of the grinding wheel of each grain of the possibility of several cutting edge at the same time to participate in grinding, this property is called abrasive wheel micro-edge. In this case,
In the grinding, the cutting edge changes constantly, after the blunt, passivation of the grinding wheel to continue grinding, for some reason the grinding force increases, when the grinding force exceeds the bond strength, the abrasive will automatically fall off, which Called the wheel "self-detachment." Although the new abrasive particles, but much worse than the grinding force after dressing. If you continue grinding will passivate again, can not get the ideal size and roughness of the workpiece, and heat increased, in this case must immediately dressing wheel.

Keep cool


Appropriate use of cooling fluid, can speed up the dressing speed and improve the efficiency of finishing. Experience dictates that a 3/8 inch diameter coolant can remove a significant amount of heat from the dresser and extend the life of the dresser. When the diamond dressing tool passes through the grinding wheel, install a coolant nozzle that fills the entire surface of the grinding wheel or continuously refills the coolant to the diamond dressing tool. Never allow the dressing tool to exit the coolant after the dresser has been brought into contact with the grinding wheel. Doing so will cause the diamond dressing tool to crack or rupture under extreme cold and hot temperature changes. In this case,
The use of filters for high-precision cooling of the filter, to avoid dirt or chips in the cooling fluid in the cycle. Contaminated coolant can quickly wear the wheel, increasing the number of wheel dressing. Dry grinding of the grinding wheel is only possible during dry grinding (only in this case the cooling of the diamond dressing tool can be interrupted). Turn off the coolant and allow the wheel to spin for a few minutes before going to work every day. This prevents the wheel from cracking. In this case,
Vibration is the finishing enemy
In the dressing of the grinding wheel, it is essential to minimize the vibration, to avoid leaving a dressing mark on the surface of the grinding wheel, to collide and to damage the dressing tool, and so on. This means that it is also necessary to maintain the wheel balance, which is determined by the structural characteristics of the wheel itself. Uneven density and the entire grinding wheel geometry is good or bad, will affect the inherent balance of a wheel. Therefore, the choice of a high-quality grinding wheel is also very important. If it is a high-quality grinding wheel, just a proper installation that can maintain a good balance wheel. According to the manufacturer's instructions, the grinding wheel is marked with an upward arrow, which indicates the light end orientation of the grinding wheel after coarse balancing. Then the user can root Zelkowa arrow instructions, pay attention to dressing wheel, to achieve dynamic balance. The coolant is evenly filled, and sometimes it helps the wheel balance. In order to avoid further vibration, it is necessary to ensure that the dressing tool is firmly clamped to the clamp base and a minimum amount of overhang is maintained to ensure that the dressing tool is sufficiently rigid. If the diamond tool is not firmly clamped, it can cause vibration, noise, ripple on the surface of the part, damage to the surface of the part, and damage to the dressing tool. in conclusion
A superhard abrasive wheel must be reshaped and sharpened before starting grinding. Following the experience presented in this article, will help you produce the most grinding wheel of the short-tailed bird grinding effect.

The Essential Factors in the Cutting Process of Grinding Wheel

Grinding wheel is an important cutting tool, its application is very wide, stone, concrete, old and new roads, ceramics and other hard and brittle materials processing are likely to use it. Diamond wheel is an important type of grinding wheel. Diamond grinding wheel is mainly composed of two parts; the base and the head.Material is the main part of the bonding head, while the head is in use in the process of cutting part, the head will be in use and continue to consume , While the matrix is ​​not, the reason why the cutter can play the role of cutting because it contains diamond, diamond as the hardest material, it is cutting the workpiece in the blade friction, while the diamond particles by the metal wrapped in a knife Head inside.

    Diamond wheel features:

    1, grinding wheel not only can cut superhard brittle material, and can grinding superhard brittle materials, cutting and grinding surface smooth, angular and tidy, broken rate is low, the finished product rate is high.

    2, cutting speed, high grinding efficiency, long service life.

    3, for super-hard brittle materials (such as marble, terrazzo, granite and refractory bricks, etc.) trimming, grooving, shaping, rough grinding plane (including the dado) and so on.

    4, grinding wheel with a cut, grinding two functions, the overall cost reduction, the utility model for construction, decoration and stone products processing.

Dressing skillsThe sharpening process is a sharpening process that grinds the abrasive grains of a superhard abrasive wheel. In this process, the need to remove the abrasive between the binder and abrasive wheel abrasive, grinding with a strong performance of the abrasive wheel prominent bonding agent, the formation of sharp cutting edge. Sharp must also remove small material from the pores of the grinding wheel surface to prevent the grinding force from acting on the grinding wheel from increasing and the grinding force on the grinding wheel to increase, which will cause vibration and surface burn. Without proper sharpening, even the best grinding wheels can not achieve the high quality and dimensional uniformity of the machined parts. In fact, when you invest in high-quality grinding wheel, in order to obtain high grinding performance, it is very good dressing it is very important. Shaping can be said to be part of the wheel preparation work, it is with the ordinary grinding wheel repair at the same time. For the superhard abrasive wheel, two processes are carried out separately, the first wheel to shape. In the use of superabrasive grinding wheel grinding, shaping is the use of plastic tools or rollers, repair sharp is often the use of a ceramic binder dressing rod, in the shaping is completed, the grinding wheel for sharpening treatment. In this case,It is important to ensure that the spindle bearings are at a certain temperature (such as a normal grinding wheel condition) before the grinding wheel can be trimmed and trimmed. This avoids damage to the part geometry and non-normal wear of the grinding wheel and dressing tool. Care must be taken with dressing tools because they are generally made of hard, abrasion-resistant but brittle diamond material and are very sensitive to minor cracks and crushing due to minor impact, stress. In this case,Because the diamond shaper itself is a tool, need to remain very sharp. The use of a dull finishing tool to dress the wheel surface will make the grinding wheel dull. In order to maintain a high-quality and sharp diamond dressing tool, at regular intervals, the need for 1/8 turn to rotate a single point or with the tip of the trimming tool. The number of rotations can be determined according to the trimming situation, according to experience, at least once a day rotation. For chisel heads and forming dressing tools, they are usually rotated 180 ° before they are dull. Most cylindrical grinding machines place the part and wheel on a horizontal line. The highest point of the outer circle of the part and the highest point of the outer circle of the grinding wheel are called the parts / grinding wheel contact point. The diamond dressing tool should dress the grinding wheel as close as possible to the part / grinding wheel contact point. It is even more important to dress the grinding wheel for the internal grinding machine with the diamond dressing tool near the highest point of the outer circle of the grinding wheel (ie the part / grinding wheel contact point at the time of grinding). Take minor trimIn order to reduce the dressing time, as if there is always want to choose a larger repair depth of the temptation. This is a very wrong idea. You must choose the most appropriate repair depth of the wheel dressing. Choose too much repair depth, will have a high cutting temperature, reducing the life of the dresser, but also the useful wheel layer excision. The end result is that both the dresser and the grinding wheel are damaged, which is counterproductive. The best dressing quantity is the rule that can restore the grinding wheel geometry and produce good grinding edge after repairing several times. With a single-point dressing tool, the diametral direction of the grinding wheel should be in contact with the 10-15 ° axis of inclination. This will allow the single-point dressing tool to produce a sharpened effect when rotated periodically. The trimming tool with multi-point contact does not need to be tilted at this angle. With the entire end face of the dressing tool being in contact with the surface of the grinding wheel. In this case,The traverse speed is the speed at which the dressing tool passes through the surface of the wheel during dressing. It requires the processing of surface roughness and metal cutting rate are played a key role. Lateral movement too slow will clog the wheel and damage the part's surface roughness and metal-cutting rate. Too slow the traverse speed can also cause the grinding wheel to vibrate and burn the part surface. Even faster horizontal movement speed can repair a good grinding wheel surface, improve grinding performance, increase grinding efficiency, reduce part surface roughness.

Consolidation abrasive manufacturing processes are: distribution of materials, mixing, molding, heat treatment, processing and inspection. With the combination of different manufacturing processes are not the same. Ceramic binder abrasive mainly by pressure method, the abrasive and binder according to the proportion of the weight of the formula after weighing, mixed in the mixing machine, into the metal mold, the molding machine in the mill blanks. Blank by drying and then into the kiln roasting, firing temperature is generally about 1300 ℃. When a low-melting-point sintering binder is used, the sintering temperature is lower than 1000 ° C. And then according to the required size and shape of the precise processing, and finally check the product. Resin-bonded abrasives are typically formed on presses at room temperature, and are hot-pressed using heat under pressure. And hardened in the hardening furnace after molding. When the phenolic resin is used as a binder, the curing temperature is 180 to 200C. Rubber-bonded abrasive is mainly used to roll mixing, and roll into thin slices, and then use the punching knife forming; some with loose material, into the metal mold on the internal press molding. After molding, the vulcanization tank is vulcanized, and the temperature is 165-180 DEG C. Metal bonded abrasive manufacturing process has two kinds of powder metallurgy and electroplating method, mainly for super-hard abrasive consolidation abrasive. The powder metallurgy method uses the bronze and so on as the binding agent, after the mixture uses the hot press or under the room temperature condition press molding, then sintering processing. Electroplating to nickel or nickel-cobalt alloy for plating metal, according to electroplating process will be consolidated in the matrix abrasive, made of abrasive. Special varieties of grinding with sintered corundum abrasive and fiber abrasive and so on. Sintered corundum abrasive is alumina powder and the appropriate amount of chromium oxide mixture, forming, at about 1800 ℃ sintering. This abrasive structure is compact, high strength, mainly used for processing watches, meters and other parts. Fiber abrasive is containing or attached to the abrasive fiber yarn (such as nylon yarn) made of raw materials, and its good elasticity, mainly for metal materials and polishing products.

Grinding wheel with the grinding process, will become dull, so in the course of the use of constant repair, so that the grinding wheel to change the sharp. The following describes how a better dressing wheel so that it maintains a higher grinding efficiency and quality.


        The sharpening process is a sharpening process that grinds the abrasive grains of a superhard abrasive wheel. In this process, the need to remove the abrasive between the binder and abrasive wheel abrasive, grinding with a strong performance of the abrasive wheel prominent bonding agent, the formation of sharp cutting edge. Sharp must also remove small material from the pores of the grinding wheel surface to prevent the grinding force from acting on the grinding wheel from increasing and the grinding force on the grinding wheel to increase, which will cause vibration and surface burn.


Without proper sharpening, even the best wheels can not achieve the high quality and dimensional uniformity of machined parts. In fact, when you invest in high-quality grinding wheel, in order to obtain high grinding performance, it is very good dressing it is very important.


Shaping can be said to be part of the wheel preparation work, it is with the ordinary grinding wheel repair at the same time. For the superhard abrasive wheel, two processes are carried out separately, the first wheel to shape. In the use of superabrasive grinding wheel grinding, shaping is the use of plastic tools or rollers, repair sharp is often the use of a ceramic binder dressing rod, in the shaping is completed, the grinding wheel for sharpening treatment.


It is important to ensure that the spindle bearings are at a certain temperature (such as a normal grinding wheel condition) before the grinding wheel can be trimmed and trimmed. This avoids damage to the part geometry and non-normal wear of the grinding wheel and dressing tool. Care must be taken with dressing tools because they are generally made of hard, abrasion-resistant but brittle diamond material and are very sensitive to minor cracks and crushing due to minor impact, stress.


Because the diamond shaper itself is a tool, need to remain very sharp. The use of a dull finishing tool to dress the wheel surface will make the grinding wheel dull. In order to maintain a high-quality and sharp diamond dressing tool, at regular intervals, the need for 1/8 turn to rotate a single point or with the tip of the trimming tool. The number of rotations can be determined according to the trimming situation, according to experience, at least once a day rotation. For chisel heads and forming dressing tools, they are usually rotated 180 ° before they are dull.


Most cylindrical grinding machines place the part and wheel on a horizontal line. The highest point of the outer circle of the part and the highest point of the outer circle of the grinding wheel are called the parts / grinding wheel contact point. The diamond dressing tool should dress the grinding wheel as close as possible to the part / grinding wheel contact point. It is even more important to dress the grinding wheel for the internal grinding machine with the diamond dressing tool near the highest point of the outer circle of the grinding wheel (ie the part / grinding wheel contact point at the time of grinding).

How to choose the right grinding wheel

Grinding wheel is an important grinding tool, which is composed of a variety of binder composition of a tool.Grinding wheel in the selection of the time, we must master a certain method.
Among them, the abrasive, binder and pore is the wheel of the three basic elements. With the abrasive, binder and grinding wheel manufacturing process and so different, grinding wheel characteristics may vary greatly, the precision of grinding, roughness and production efficiency has an important impact.Therefore, the appropriate conditions must be selected according to the wheel.

Juchuang Abrasive is the first wheel factory is specialized in producing a small wheel of small and medium-sized manufacturers, loved by the majority of customers, the product is well known. The first wheel produces all kinds of suitable wheel, the whole plant has more than 130 kinds of specifications, to meet the vast majority of customer requirements of the wheel, whether it is cutting films, grinding tablets, one hundred impeller are sold.

Grinding wheel: A rounded consolidated abrasive tool with a through hole made of abrasive and binder resin. Grinding wheel is the largest amount of abrasive, the use of the most extensive one, the use of high-speed rotation, the metal or non-metallic parts of the cylindrical, inner circle, plane and a variety of surface rough grinding, semi-fine grinding and Grinding and grooving and cutting and so on. In this case, In this case, Grinding wheel is the most important kind of abrasive grinding. The grinding wheel is a porous body which is prepared by adding binder, grinding, drying and baking. Due to the different abrasives, binders and manufacturing processes, grinding wheel characteristics vary widely, and therefore have a significant impact on the quality of grinding, productivity and economy. The characteristics of the grinding wheel mainly by the abrasive, particle size, binder, hardness, organization, shape and size and other factors. In this case, 1, classification A wide range of grinding wheel. In this case, According to the used abrasive can be divided into ordinary abrasive (corundum and silicon carbide, etc.) and natural abrasive grinding wheel superhard abrasive and (diamond and cubic boron nitride, etc.) wheel; According to the shape can be divided into flat-shaped grinding wheel, bevel wheel, cylindrical grinding wheel, cup-shaped grinding wheel, disc-shaped grinding wheel, etc .; according to binder can be divided into ceramic grinding wheel, resin grinding wheel, rubber grinding wheel, metal grinding wheel. Characteristics of the grinding wheel parameters are abrasive, viscosity, hardness, bonding agent, shape, size and so on. In this case, Since the grinding wheel is normally operated at high speed, it shall be subjected to a rotary test before use (to ensure that the grinding wheel does not rupture at the maximum operating speed) and a static balance test (to prevent machine vibration during operation). The grinding wheel should be trimmed for a period of time to restore grinding performance and correct geometry.

Sdc grinding wheel and the difference between where the CBN wheel? SDC is a metal-coated diamond abrasive wheel to do; CBN is to CBN (cubic boron nitride) as abrasive grinding wheel, are generally used are diamond grinding wheel. SDC grinding wheel is a diamond grinding wheel, and CBN grinding wheel hardness. General abrasive wheel commonly used: A-corundum WA-white corundum C-black carbonized silicon GC green silicon carbide AC mixed abrasive SA-single crystal corundum MA-microcrystalline corundum BA-black corundum ZA-zirconia corundum PA-chrome corundum FA-semi-brittle corundum SG-ceramic Corundum SC-cubic silicon carbide BC-boron carbide D-diamond

According to the structure of the machine and the need for grinding, grinding wheel made of various shapes and sizes. Table 6 is commonly used in several wheel shape, size, code and use. The outer diameter of the grinding wheel should be chosen as much as possible in order to improve the wheel's peripheral speed, so to improve the productivity of grinding and surface roughness favorable. In addition, in the machine stiffness and power permit conditions, such as the choice of a larger width of the wheel, the same can be received to improve productivity and reduce the effect of roughness, but the grinding of high-sensitivity materials, in order to avoid surface burns and Resulting in cracks, grinding wheel width should be appropriately reduced.

The safe operating rules of grinding wheel

The safe operating rules of grinding wheel: 1. Before installing the wheel should check whether the cracks, if the naked eye is not easy to identify, can be used to hold up the wheel of solid lines, and then a wood gently tap, listen to their sound (metal sound is excellent, dumb sound inferior). 2. Grinding wheel machine must have a solid appropriate wheel cover, or shall not be used. 3. Install the wheel, the nut shall not be too loose, too tight, should be checked before using the nut loose. 4. After the wheel is installed, be sure to idle test 2 - 3 minutes to see whether the balance of its operation, protection device is properly reliable, in the test run, should arrange two staff, one wheel side wheel, In case of abnormality, the power supply should be cut off immediately by another person in the power distribution cabinet to prevent the accident. 5. When using the grinder, wear protective glasses. 6. Grinding wheel must be 40 - 60 seconds after the stable speed grinding, grinding tools should stand on the side of the wheel, not on the wheel, to prevent broken pieces of worn out of the wheel. 7. It is strictly forbidden to use one wheel at the same time. 8. Sharpen, the tool should be slightly higher than the center of the wheel.Not too much force to prevent slippage injury hand. 9. Grinder without permission, not to indiscriminate use. 10. Turn off the grinder immediately after use. 11. Grinding wheel should be cleaned cleanly after get off work.

The grinding wheel is made of abrasive and bonding agent with a circular hole in the central consolidated abrasive.

41-A30Q4BF MAX SPEED R.P.M.

41

According to international practice means T41-parallel wheel T42-cymbals-type cutting wheel T27-cymbals-type grinding wheel

A

Abrasive: A-corundum WA-white corundum C-black carbonized silicon GC green silicon carbide
AC mixed abrasive SA-single crystal corundum MA-microcrystalline corundum BA-black corundum ZA-zirconium corundum
PA-chrome corundum FA-semi-brittle corundum SG-ceramic corundum SC-cubic silicon carbide BC-boron carbide D-diamond

30

80, 90, 100, 120, 150, 180, 220 (hereinafter referred to as "fine powder") in the form of fine particles of abrasive grain size: 16, 20, 24, 30, 36, 40, 46, 54, 60, 70,

Q

Hardness of grinding wheel: F, Q, H, J, K, L, M, N, P, Q, R, S, T, Y

4

Organization number: According to the abrasive in the grinding wheel products in the volume ratio points
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

B

Binder Type

F

Enhanced

MAX SPEED

Maximum permissible linear velocity in meters per second

R.P.M.

New Production Technology of Resin Grinding Wheel

One of the bottlenecks affecting the production cost and efficiency of resin grinding wheel is its molding technology. Resin wheel needs large-scale production, the ideal is to automatically suppress the molding, can save manpower costs, improve efficiency.
    Back in the eighties of last century, the industry carried out in this area of ​​exploration and try to introduce from abroad an automatic molding press. The device is compact, and the difference between the ordinary press only in a more feed system.
    Its working principle is: the mixture into the hopper at the top, through the vibration, fell on the conveyor belt, with a scraper level, adjust the transmission speed, the material will be sent to the weighing bucket, weighing accurately after feeding mold Cavity.
    From the design principle point of view, should be able to quickly and effectively, but there is a fatal flaw, so that no matter how adjusted, always reach the ideal level of design. Because the grinding wheel material is not like smelting corundum, silicon carbide, raw materials, the error can not be too large, through the conveyor belt feeding, in order to accurately weighing is not an easy task, repeated adjustment, not only can not improve efficiency, but wasted a lot of time.
    Now is a compromise approach to bypass the more difficult feed system, artificial feed, with multi-station press, reduce labor intensity, production efficiency can be guaranteed.
    In the future still need to broaden their horizons, another way to design the ideal feed system, once the success of the production of grinding wheel will be the same as the production of coated abrasive, efficient, fast, fully mechanized, automated farewell labor-intensive production, The market will also be earth-shaking changes!

How to choose the high-quality wheel

    Grinding wheel is an important grinding tool, its type is different, different types of grinding wheel different role, such as diamond grinding wheel, mainly for glass, ceramics, ferrite, semiconductor materials such as hard and brittle materials and metal grinding materials, Material shape processing, electrolytic grinding, as well as grinding machining center with a diamond drill grinding and other heavy-duty cutting, with grinding wear resistance, high efficiency, long service life characteristics.
    Of the first wheel is more important is: the quality of diamond grinding wheel
    Adhere to the long-term cooperation with you is our goal from the beginning.
    You are asking us to explore the solution together. Your question is both a challenge to our work and an incentive for us.
    We work hard to help us focus on the effectiveness of the work, stand in your position to look at your problem. We value your thoughts!
    Research "grinding wheel" problem has become our habit. Special grinding wheels require special solutions.
    We pursue the highest precision and top quality.
    For more information about our business, please feel free to contact us. Welcome to contact us today!

Grinding Wheel - Repair Tool

Grinding Wheel - Repair Tool

    Grinding wheel is now in our production and the role of life is irreplaceable, the wheel gives us a lot of convenience and welfare, grinding wheel in the production process and the future use of them, there may be some problems, the problem occurs after the necessary Solve, grinding wheel in the repair time will be used to what tools?
    Mechanical processing, the grinding wheel to be used to the grinding wheel, grinding their own should be used to what kind of tool you? Also heard that there is what the diamond wheel, cubic boron nitride, etc. is how the matter? Wheel What are the evaluation criteria? If the wheel is used after what groove, what should we use a tool to repair yo?
    1. Most of the hand grinding is alumina grinding wheel and silicon carbide grinding wheel, alumina grinding wheel is suitable for alloy carbon steel tool, such as high speed steel tool and tool steel drill bits. Carbide wheel for carbide cutting tools.
    2. Diamond grinding wheel for grinding tools for various types of tools.
    3 cubic boron nitride is mainly used for the production of high-speed cutting tools, cutting speed than its high carbide cutting tools.
    4. Grinding wheel groove can be used after the repair of the diamond pen, you can also use the wheel cutting blade repair, but usually when you use the wheel to pay more attention to minimize the emergence of grooves.
    Questions added: The first question: the hardness of the grinding wheel is not the same, the bond strength of the wheel is not the same, the application is also different.
    The second problem: after grinding wheel wear can be used to repair such as diamond pen is actually harder things with his amendment flat, there may be less precise, probably on this meaning.

The balance and installation of Grinding Wheel

Unbalanced grinding wheel in the high-speed rotation will produce vibration, affecting the quality of processing and machine tool accuracy, serious will cause the wheel fracture, endangering the safety of people and equipment. The main reason for the imbalance caused by uneven density of all parts of the wheel, geometric asymmetry and installation eccentricity and so on.

Therefore, the grinding wheel must be balanced before installation. There are two kinds of static and dynamic balance: - Static balance only; In the high-speed grinding and high-precision grinding, it must be balanced. For large-diameter grinding wheel, after the use of a period of time, due to grinding wheel wear, there may be unbalanced, need to balance again.

First, the use of super-hard abrasive features

The use of super-hard abrasive (diamond or cubic boron nitride) as a cutting tool abrasive, known as super-abrasive abrasive (referred to as super-hard abrasive). As the superhard abrasives have a great advantage over ordinary abrasives, superhard abrasives show more excellent grinding performance than ordinary abrasives, and have been widely used.

1, superhard abrasive itself has a very high hardness, can process a variety of high hardness materials, especially for ordinary abrasive material is more difficult to process its superiority;

2, Superhard abrasive wear less, the use of long cycle, high grinding ratio, get better economy, the use of shape to maintain good, no need to regularly change the grinding wheel and dressing wheel, saving working hours, improve working conditions, Is conducive to processing operations;

3, super-hard abrasive cutting sharp, grinding force is small, is conducive to processing parts machining accuracy and surface roughness to improve and reduce the power consumption of machine tools; abrasive abrasive sharp grinding grinding in the process of grinding temperature than ordinary Low, can greatly improve the quality of the surface to be processed to reduce or avoid parts of the cracks, burns, microstructure and other shortcomings, thereby improving the service life of parts, greatly improving the overall economic indicators.

In view of superhard grinding with unparalleled advantages, with the new materials, new technologies continue to emerge, with the processing industry, technological progress, its application continues to expand, the amount of growing, effectively promoting economic development. However, due to the high cost of tools, and its own unique performance and regularity, improper use will not only cause serious waste, but also not satisfied with the quality of processing and should get good economic results.


Second, first, to select the appropriate characteristics of superhard abrasive
Superhard abrasive is a different abrasive and ordinary abrasive, its structure and personality are not the same, has its unique characteristics. Superhard abrasive is characterized by abrasive, particle size, binder, concentration, shape and size items.

Dressing skills
The sharpening process is a sharpening process that grinds the abrasive grains of a superhard abrasive wheel. In this process, the need to remove the abrasive between the binder and abrasive wheel abrasive, grinding with a strong performance of the abrasive wheel prominent bonding agent, the formation of sharp cutting edge. Sharp must also remove small material from the pores of the grinding wheel surface to prevent the grinding force on the wheel from increasing and the grinding force on the grinding wheel to increase, which will cause vibration and surface burn. Without proper sharpening, even the best wheels can not achieve the high quality and dimensional uniformity of machined parts. In fact, when you invest in high-quality grinding wheel, in order to obtain high grinding performance, it is very good dressing it is very important. Shaping can be said to be part of the wheel preparation work, it is with the ordinary grinding wheel repair at the same time. For the superhard abrasive wheel, two processes are carried out separately, the first wheel to shape. In the use of superabrasive grinding wheel grinding, shaping is the use of plastic tools or rollers, repair sharp often use a ceramic bonding agent of the dressing rod, after the completion of shaping, grinding wheel for sharpening treatment. In this case,
It is important to ensure that the spindle bearings are at a certain temperature (such as a normal grinding wheel condition) before the grinding wheel can be trimmed and trimmed. This avoids damage to the part geometry and non-normal wear of the grinding wheel and dressing tool. Care must be taken with dressing tools because they are generally made of hard, abrasion-resistant but brittle diamond material and are very sensitive to minor cracks and crushing due to minor impact, stress.
Take minor trim
In order to reduce the dressing time, as if there is always want to choose a larger repair depth of the temptation. This is a very wrong idea. You must choose the most appropriate repair depth of the wheel dressing. Choose too much repair depth, will have a high cutting temperature, reducing the life of the dresser, but also useful to remove the wheel layer. The end result is that both the dresser and the grinding wheel are damaged, which is counterproductive. The best dressing quantity is the rule that can restore the grinding wheel geometry and produce good grinding edge after repairing several times. With a single-point dressing tool, the diametral direction of the grinding wheel should be contacted with a 10-15 ° axis of inclination. This will allow the single-point dressing tool to produce a sharpened effect when rotated periodically. The trimming tool with multi-point contact does not need to be tilted at this angle. With the entire end face of the dressing tool being in contact with the surface of the grinding wheel. In this case,
The traverse speed is the speed at which the dressing tool passes through the surface of the grinding wheel during dressing. It requires the processing of surface roughness and metal cutting rate are played a key role. Lateral movement too slow will clog the wheel and damage the part's surface roughness and metal-cutting rate. Too slow the traverse speed can also cause the grinding wheel to vibrate and burn the part surface. Even faster horizontal movement speed can repair a good grinding wheel surface to improve the grinding performance of grinding wheel to increase the grinding efficiency and reduce part surface roughness.

Grinding wheel application method - stone grinding

Grinding wheel is an important tool, which consists of many small and hard abrasive and bonding agent made of porous objects. Abrasive grains directly bear the cutting work, must be sharp and has a high hardness, heat resistance and a certain degree of toughness. Commonly used abrasives are alumina (also known as corundum) and silicon carbide two. Alumina abrasive high hardness, good toughness, suitable for grinding steel materials. Silicon carbide abrasive hardness higher, more sharp, good thermal conductivity, but more brittle, suitable for grinding of cast iron and carbide.
The same grinding wheel, because of its different thickness, the workpiece after processing the surface roughness and processing efficiency is not the same, abrasive coarse for coarse grinding, grinding fine for fine grinding, abrasive more coarse, smaller particle size. Qingxian Wang Weitun the first wheel factory is Qingxian well-known wheel manufacturer, the production of grinding wheel, wheel, new and old customers get the praise!
The binder acts as a bond abrasive. Commonly used are ceramic binders, followed by resin binders. Binding agent different choice of materials, affecting the grinding wheel corrosion resistance, strength, heat resistance and toughness.

The more firmly bonded, the more difficult to fall from the wheel, called the hardness of the wheel, that is, the hardness of the grinding wheel is the surface of the abrasive wheel under the action of the external force of the degree of difficulty falling. Easy to fall off called soft, otherwise called hard. The hardness of the grinding wheel and abrasive hardness are two different concepts. The surface of the workpiece to be ground is soft and the edge of the abrasive grain is not easy to wear, so that the abrasive grain can be used for a longer time, that is to say, an abrasive wheel with stronger hardness can be used. Conversely, the low hardness of the grinding wheel for grinding high hardness of the workpiece.
In order to ensure the safety, the wheel should be checked before installation, there should be no cracks and other defects; in order to make the wheel smooth, should be used before the dynamic balance test.
Grinding wheel work after a certain time, the surface of the gap will be debris clogging, abrasive sharp angle will be blunt, the original geometry distortion. It must therefore be trimmed to restore the cutting capacity and correct geometry. The wheel needs to be trimmed with a diamond pen.

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Grinding wheel grinding conditions

1. Grinding wheel margin is too large.

2. Reasonable grinding wheel parameter setting, reasonable choice grinding wheel grinding amount. In the grinding wheel burn occurs when less, should increase the longitudinal feed rate: grinding wheel burn occurs when a large amount of feed should be reduced to increase the number of grinding wheel.

3 workpiece speed reasonable setting, too high or too low is not very good.

4. Magnetic force is not enough, the workpiece stops adjusting the magnetic force.

5. Grinding spindle spindle vibration overhaul.

6. Strictly control the grinding wheel drive system and the gap between the grinding wheel mandrel, grinding wheel belt elastic adjustment appropriate.

7. Workpiece and grinding wheel motor torque selection is sufficient.

Users need to improve product quality awareness, the courage to improve manufacturing technology


The 21st century is a high-tech era, the product must be a high-performance, high-quality only the market, enterprises have vitality. To this end, the manufacturing technology should be improved as soon as possible, and the promotion of the use of CBN tools to improve manufacturing technology is a powerful measure, which not only requires the competent authorities of the strong support and support, organized and planned to gradually promote the CBN tools, Use, but also requires the user the courage to accept new materials, new technologies, changing the old concept of production and management methods, that knife (grinding) with a very low cost targets, only about 1/100 of the cost of the product, rather than In order to improve production efficiency and ensure product quality prevail, this will limit the quality and efficiency of the knife (grinding) with the application of advanced equipment and production capacity. Practice has proved that CBN knife (grinding) with the effectiveness of not only can improve the quality of the product processing, but also can improve economic efficiency.

Grinding wheel balance bracket is a must be equipped with accessories, it can be static balance wheel, in order to achieve the correct use of the purpose of grinding wheel, plus level instrument can also detect the static balance of precision parts.
Wheel balance bracket selection of high-quality materials for the balance axis, the heat treatment and precision machining and assembly Guer high precision, stable performance is an ideal machine tool accessories. General diameter greater than 125mm of the wheel to be balanced, so that the wheel center of gravity coincides with its rotation axis. Unbalanced grinding wheel in the high-speed rotation will produce vibration, affecting the processing quality and precision machine tools, serious damage will cause machine and grinding wheel disruption caused by uneven primary uneven grinding wheel parts density, geometric asymmetry As well as eccentric installation. Therefore, before installing the wheel to be balanced, the balance of static and dynamic balance wheel balance of two. Under normal circumstances, only for static balance, but in high-speed grinding (speed greater than 50m / s) and high-speed grinding, the need for dynamic balance. Balance wheel will be installed in the balance of the spindle, and then put the mandrel of the grinding wheel flat balance wheel on the balance of the guide rail, the wheel will swing back and forth until the swing stop. Balanced grinding wheel can be stationary at any position. If the wheel is unbalanced, its heavier parts always go to below, where the balance can be moved to balance.

Most of the initial production of ceramic grinding wheel, ceramic bonded grinding wheel has the advantage of its natural porous and chemical stabilityQualitative,Which is suitable for dry grinding and wet grinding,Especially when water-based and oil-based grinding fluids are used.but,Ceramic wheel of the poor flexibility,And requires a high sintering temperature,Limiting its development.
Phenolic resinMixture wheel has a good elasticity,On the shock,Impact,Lateral pressure sensitivity of the small advantages.Its high stability makes it Able to adapt to higher speed and improve the grinding performance,Which is particularly suitable for grinding wheel and cutting wheel,it Of the good flexibility to make it suitable for ultra-precision grinding and surface polishing.
Phenolic resin-bonded grinding wheel production process are mainly cold-pressing process, semi-hot pressing process and hot pressing process three

Species.
1.Cold pressing process:
Cold bonding process using binder and wetting agent powder, usually used as a wetting agent with liquid phenolic
Resin, furfural, furfuryl alcohol, cresol, etc., with the most liquid phenolic resin. Determine the liquid resin and
The ratio of powdered resin used (usually called Liquid powder ratio) Of the factors are: abrasive particle size distribution, filler type,The filler content, the viscosity of the liquid resin, the nature of the powdered resin, and the like. If the viscosity of the liquid resin is larger,Completely coated abrasive surface on the need for more liquid resin; abrasive and filler particle size, the smaller the table The larger the area, the greater the amount of liquid; the higher the molecular weight of the powder resin, the lower the free phenol,Its adhesion with the liquid resin is worse, the more the amount of liquid required. Above several situations need to mention High liquid powder ratio. Liquid resin is generally used as a wetting agent,Liquid powder than the selection1:2-1:4, And with furfural or Furfuryl alcohol and anthracene oil as a wetting agent mixture, liquid powder than the selection1:6-1:8. Mixing machine to go through the process To achieve the desired mixing effect without damaging the abrasive. When adding the mixture of fine powder
Between the general2-5Minute, too short can not guarantee mixing evenly, too long resin film easy to fall off, and lead Caused by material temperature rise, the resin to cure.
The mixing procedure is as follows:
First, the abrasive, usually mixed particle size, pre-mixed, then add wetting agent, uniform wetting abrasive,

The powdery resin which had been mixed with other powdery fillers was further added and the mixture was further mixed until homogeneous. Mixed good grinding

Material should have good plasticity and mobility, the material can not be too wet, or easy to agglomerate, but can not have powder

Group, while ensuring a good liquidity, in order to ensure adequate injection, the general method used to remove the sieve

Piece. Good or bad way to determine the plasticity of materials is: grasping a good mix of materials, gently pinch it by hand

Into a group better.



The general will be good to join the powdery material in the wet abrasive in the formation of easy dough, has gradually been eliminated, now

In the use of more double-pot mixture method is the first abrasive and wetting agent in a mixer in the mix,

While another mixer will be powdered resin and other powder filler mix, and then a good wetting abrasive

Into the powder, the mixture can be uniform. Double-pot mixture of the advantages of both can not produce dough, but also to avoid

Pollution-free, easy to clean material pot.



The mixed material is sieved, that can be used to suppress the.



The pressing procedure is as follows:



The mold is installed, weighing the required amount of abrasive into the mold cavity, flattened after the suppression. Need to be placed

Reinforced fiberglass mesh is placed as required. And then pressurized at room temperature, the general pressure of the cold pressure range15-30N / mm2, Preferably15-25 N / mm2. The choice of pressure depends on the material plasticity

And the density required to achieve the wheel. Should not use too high pressure, otherwise it will crush the abrasive. When pressed

Between the general5-50Sec, preferably5-30Sec, the length of time depends on the wheel to achieve the required density andShape and material plasticity is good or bad. Then you can remove the wheel for the next step- Cured.

First, the wheel type and performance

(A), Overview

Grinding wheel is the most important kind of abrasive grinding. The grinding wheel is a porous body which is prepared by adding binder, grinding, drying and baking. Due to the different abrasives, binders and manufacturing processes, grinding wheel characteristics vary widely, and therefore have a significant impact on the quality of grinding, productivity and economy. The characteristics of the grinding wheel mainly by the abrasive, particle size, binder, hardness, organization, shape and size and other factors.

(B), wheel classification

  Grinding wheel can be divided into ordinary abrasive (corundum (Al2O3) and silicon carbide, etc.) wheel and superhard abrasive (diamond and cubic boron nitride) wheel; according to grinding wheel shape can be divided into flat grinding wheel, Cylindrical grinding wheel, cup-shaped grinding wheel, dish-shaped grinding wheel, etc .; according to the binder can be divided into ceramic grinding wheel, resin grinding wheel, rubber grinding wheel, metal grinding wheel.

CBN grinding wheel in the hole in the application

Internal grinding efficiency has been very low, the main reason is the grinding speed, grinding wheel material and the rigidity of the problem. Production process used in dressing wheel, grinding wheel replacement time accounted for almost a single piece of work time 1/3 to 1/5. If the inner or groove grinding using CBN electroplated grinding wheel, and the wheel speed, increasing the diameter of the grinding rod, can be properly increased workpiece speed and feed rate, not only can guarantee the hole (arc) diameter, groove width size and shape Bit accuracy, surface roughness and avoid burns, but also can be doubled to improve processing efficiency and reduce processing costs.


Such as a domestic factory processing an annual output of 600,000 textile machinery rolling bearing sets, grinding φ15.5 +0.04 the hole and the adjacent arc groove, in the past with chrome corundum (GG) wheel, need to use two processes in two M224 internal grinding machine, the slot (arc) diameter difference and the size and hole concentricity is difficult to ensure, and low efficiency, the use of CBN wheel, the coarse grinding rod, increased feed, saving trim And the replacement of grinding wheel time, completely solve the original problem. And then changed to hole, groove at the same time grinding, that is, in the grinding rod installed two grinding wheel, so that the grinding efficiency increased by 1 times, saving a grinding machine. The surface roughness of the workpiece is Ra0.63μm. The grinding process parameters are as follows: υ = 36m / s, υ2 = 19m / min, f = 1μm / r, f = 0.5μm / r, Time t = bs, with 10% concentration of the emulsion value.

The hardness of the grinding wheel is not the hardness of the abrasive wheel, but the hardness of the combination between the abrasive. Is divided into soft, soft, hard, super-hard several. Each has several levels. Hard abrasive wheel is not easy to fall off, grinding the metal scraps easily bonded to the grinding wheel, resulting in surface burns; soft abrasive wheel easy to fall off, do not burn the workpiece, but the grinding wheel consumption faster.
Grinding wheel in addition to hardness, the organizational structure is divided into tight, in a total of 12 loose, compact structure is not easy to heat.
According to your situation, you can then check the wheel speed is not low? The workpiece speed is not high?
The hardness of the wheel should be its granularity! You can see the coarser the grain size the more rough the wheel, the appearance can be seen! The larger the model number of the grinding wheel, the finer it is used to refine or to throw, the more soft and brittle! Easily damaged.

Grinding machine maintenance

A)Grinder shield, power switch should be intact, reliable;

B)Grinding wheel wheel should be checked without cracks, no loosening;

C)Power cord without damage;

D)Grinding machine shield, the power switch should be clean.

E)Insulation resistance of the power supply into the line, measured with a shake table insulation resistance should be greater than

2MΩ

F)One year of maintenance repair.

2.CBN grinding wheel in the hole in the application

Internal grinding efficiency has been very low, the main reason is the grinding speed, grinding wheel material and the rigidity of the problem. Production process used in dressing wheel, grinding wheel replacement time accounted for almost a single piece of work time 1/3 to 1/5. If the inner or groove grinding using CBN electroplated grinding wheel, and the wheel speed, increasing the diameter of the grinding rod, can be properly increased workpiece speed and feed rate, not only can guarantee the hole (arc) diameter, groove width size and shape Bit accuracy, surface roughness and avoid burns, but also can be doubled to improve processing efficiency and reduce processing costs.


Such as a domestic factory processing an annual output of 600,000 textile machinery rolling bearing sets, grinding φ15.5 +0.04 the hole and the adjacent arc groove, in the past with chrome corundum (GG) wheel, need to use two processes in two M224 internal grinding machine, the slot (arc) diameter difference and the size and hole concentricity is difficult to ensure, and low efficiency, the use of CBN wheel, the coarse grinding rod, increased feed, saving trim And the replacement of grinding wheel time, completely solve the original problem. And then changed to hole, groove at the same time grinding, that is, in the grinding rod installed two grinding wheel, so that the grinding efficiency increased by 1 times, saving a grinding machine. The surface roughness of the workpiece is Ra0.63μm. The grinding process parameters are as follows: υ = 36m / s, υ2 = 19m / min, f = 1μm / r, f = 0.5μm / r, Time t = bs, with 10% concentration of the emulsion value.


3. Grinding gear with CBN grinding wheel


Gear grinding is a single tooth surface and multi-tooth surface grinding, single tooth surface grinding can obtain high processing accuracy, but low efficiency, high cost, multi-tooth grinding although the production efficiency is high, but its processing The quality is worse than single tooth grinding. If CBN grinding wheel, whether using single tooth surface grinding or multi-tooth grinding, the use of electroplated CBN grinding wheel or ceramic grinding wheel, the effect is extremely significant:


(1) CBN grinding wheel can be made into high-precision tooth profile, because of high durability, not frequent dressing, do not often adjust the machine, access to a stable tooth gallery, lead and pitch accuracy.


(2) can achieve high-speed grinding and high feed rate grinding tooth surface, low roughness and will not burn, can improve the grinding efficiency under the conditions of high gear accuracy (6 to 7).


(3) The CBN grinding wheel has long service life, good grinding performance, saving a lot of auxiliary time such as grinding wheel replacement, machine adjustment and workpiece inspection.

Special-use Grinding wheel

Special-use Grinding wheel stone for thin-cutter slitter-scorer machine in corrugated carton production line include special wheels for hard-alloy blade, high-speed steel blade and Grinding wheels for blades in miscellaneous materials. 

Import of excellent materials, unique formula and advanced technologies have been adopted in “Yinglong” Grinding-stone. Senior engineers strictly control the overall production process and ensure the qualities of products. 

Featuring sharp blade and well wear resistance, our products have been proved to reach the international advanced level. We have experienced and skillful technicians who ensure that both size and specification of every Juchuang wheel can meet the international standard.

0 Introduction

Superhard abrasives made from diamond or cubic boron nitride (CBN) abrasives have been widely used in all areas of grinding due to
their excellent grinding properties.


Diamond grinding wheel grinding cemented carbide, glass, ceramics, precious stones and other high-hard and brittle materials effects
tool. In recent years, with the rapid development of high-speed grinding ultra-precision grinding technology, a higher demand on the
wheel, metal bond wheel because of its combination of high strength, good shape, long service life and other significant features
and production has been widely application.


Metal bonded diamond wheel according to the different manufacturing methods are mainly sintering, electroplating two types. In order
to give full play to the role of superhard abrasive, foreign from the early 1990s began to use high-temperature brazing process
development of a new type of grinding wheel, that is, single-layer high temperature brazing superhard abrasive wheel.


1, sintered type diamond grinding wheel

Sintered metal bond grinding wheel is made of bronze and other metal as bonding agent. It is made by high temperature sintering

method. It has high bonding strength, good formability, high temperature resistance, good thermal conductivity and long service life

and can bear heavy load. As the grinding wheel sintering process inevitably exist shrinkage and deformation, so the wheel must be

used before shaping, but the wheel dressing more difficult. At present, the conventional grinding wheel shaping method is not only

time-consuming and labor-intensive, but also the dressing process of diamond particles fall off more, dressing the wheel itself is

very expensive, plastic precision is low.


In recent years, scholars have carried out the application of special processing methods of dressing metal bond diamond wheel

research work, mainly electrolysis dressing method, EDM dressing compound dressing method. Electrolysis dressing method is fast, but

the precision is not high; EDM dressing high precision, both plastic surgery can repair sharp, but the slower shaping; complex

dressing method of electrolytic spark compound dressing method, mechanochemical composite dressing method So the dressing effect is

better, but the system is more complex, so the sintering of diamond wheel dressing problem is still not well resolved.


In addition, because the grinding wheel manufacturing process determines the surface morphology of the random, each grain geometry,
distribution and cutting edge height is inconsistent, so only a small number of high-cutting edge cutting to the workpiece, limiting
grinding quality grinding Efficiency is further improved.