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.