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.