1. Grinding automotive parts - camshaft and crankshaft

The camshaft of automobile engine has a number of cams. The coarse grinding and fine grinding of the cam after hardening is the key process which affects the cam quality. Usually by the use of simulation-shaped grinding, the workpiece speed limit is limited, the workpiece is easy to produce grinding burns crack, the use of analog-shaped grinding, the cam surface contour curve wheel diameter affected by the size, it is difficult Make sure the cam profile is correct. Production practice shows that when the wheel diameter is large, the grinding out of the cam thin, when the wheel diameter is small, grinding the cam fat, only when the grinding wheel diameter close to or equal to the cam roller diameter (usually φ570mm) The profile error is close to zero, that is, the grinding cam surface contour curve close to the cam cam. In actual production, the wheel diameter used is generally from D600 (or 610) to D500, and the ideal wheel diameter (570) a lot of difference, so the total camshaft in most of the cam curve exceeded. To solve this problem, we rely on the grinding cam on the use of CBN grinding wheel grinding, CBN wheel diameter can be made D575, CBN abrasive layer thickness of 4 ~ 5mm, the grinding wheel diameter is the minimum D565, grinding diameter Although the scope of only 10mm, but the number of grinding parts is equivalent to dozens of ordinary wheel, not only to ensure the correct cam curve, but also does not produce grinding burns.

Such as Liton industrial automation company with CBN wheel grinding camshaft, the cost is reduced by 50%, the cam surface fatigue strength increased by 30%; Dongfeng Motor Company Xiangfan diesel engine plant with ceramic bonding agent CBN grinding wheel coarse grinding chilled cast iron camshaft , The cam grinding margin t = 4 ~ 5mm, υ sand = 60m / s, the workpiece speed n = 100r / min, υf = 0.1mm / s, using high-speed grinding fluid, CBN grinding wheel life is basically equivalent to 20 Corundum abrasive wheel.

Applications of Diamond Grinding Wheel

Metal and non-metallic hard and brittle material is widely used in ordinary abrasive difficult to process low iron content, it is widely used in optical processing, sapphire, watches lenses, glasses, glass, precision ceramic, ferrite, automobile and motorcycle, beauty , aviation, military, cutting tool industry. Such as cemented carbide, alumina ceramic, optical glass, agate gem, semiconductor materials, stone and the like.

So far only ceramic bond diamond wheel can be trimmed on the machine. When using such a grinding wheel, worn too much and the feed rate is too low. Recently, however, there is a resin bonded grinding wheel groove, both with high material removal rate can be trimmed on the production equipment.

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 and counterproductive. The best dressing quantity is the rule that can restore the grinding wheel geometry and produce good grinding edge after repairing several times.

Use a single-point dressing tool, should be 10-15o of the axis of the angle of contact with the grinding wheel diameter direction. 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.

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.

End face of the grinding wheel - Repair

After forming,grinding wheel end there may be some shortcomings, so to repair, due to the different abrasives, repair methods will be different, so we should take a different approach for different abrasive, then, we have to introduce how three different abrasive grinding wheel is carried out to repair:
First, the type of abrasive corundum, and this wheel is usually not needed trimming, by self-sharpening wheel to fall off the sand, ongoing appropriate compensation it. That is up to the new wheel in the beginning, in order to balance a simple tidy up.

Second, diamond abrasives, such grinding wheel dressing wheel dressing pen can not use, but to rely on a little soft, sticky bigger things to be trimmed, for example, A3. Iron, stone and so on.
Third, CBN abrasives, which can refer to the second wheel dressing wheel dressing mode.
 

14FF1 Duplex Grinding wheel bevel wheel_Diamond Grinding Wheel For Metal_Juchuang Abrasive Co.,Ltd.

14FF1 Duplex Grinding wheel bevel wheel_Diamond Grinding Wheel For Metal_Juchuang Abrasive Co.,Ltd.

M-tel:  +86-15136439750

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Drill modification Grinding Wheel HD

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

Grinding Wheel life and Criterion

The actual time of the grinding wheel dressing between the two is called the wheel life. Analyzing wheel life, generally based on the phenomenon of post-Face wear produced by visual determination. The main phenomenon: grinding process appears self-excited oscillation, the surface appears regeneration chatter; grinding noise increases; the workpiece surface burn appeared grinding, grinding force a sharp increase or decrease; loss of precision grinding; grinding surface rougher. The phenomenon is mainly due to the high temperature of grinding the workpiece surface roughness and precision and thermal damage due to the degradation caused by self-excited vibration.

Wheel End of life form: the wheel surface passivation - polished state (to increase the grinding force and grinding heat); wheel loading (prone to vibration or noise until burns); grinding wheel contour damage (machining accuracy)

What Are Superabrasives?

Superabrasives make up a special category of bonded abrasives designed for grinding the hardest, most challenging work materials.

Because carbides, high speed steels, PCD, PCBN, ceramics and some other materials used to make cutting tools can be nearly as hard as conventional abrasives, the job of sharpening them falls to a special class of abrasives-diamond and the CBN, the superabrasives.

These materials offer extreme hardness, but they are more expensive than conventional abrasives (silicon carbide and aluminum oxide). Therefore, superabrasive grinding wheels have a different construction than conventional abrasive wheels. Where a conventional abrasive product is made up of abrasive all the way through, superabrasive wheels have abrasive on the cutting edge of the wheel that is bonded to a core material, which forms the shape of the wheel and contributes to the grinding action.

Superabrasive wheels are supplied in the same standard grit range as conventional wheels (typically 46 through 2,000 grit). Like other types of wheels, they can be made in a range of grades and concentrations (the amount of diamond in the bond) to fit the operation.

There are four types of bond used in superabrasive wheels. Resinoid bond wheels are exceptionally fast and cool cutting. They are well-suited to sharpening multi-tooth cutters and reamers, and for all precision grinding operations. Resin is the "workhorse" bond, most commonly used and most forgiving. Vitrified bond wheels combine fast cutting with a resistance to wear. They are often used in high-volume production operations. Metal bond wheels are used for grinding and cutting non-metallic materials, such as stone, reinforced plastics and semiconductor materials that cannot be machined by other cutting tools. Single-layer plated wheels are used when the operation requires both fast stock removal and the generation of a complex form.

JUCHUANG DIAMOND WHEEL

RESIN BOND - Depending on the material to be cut or ground, JUCHUANG DIAMOND WHEEL has the resin bond matrix to get the job done efficiently and at the lowest possible cost.  Our resin bond matrixes are designed for maximum performance which reduces production time and increases profits.  Advanced bonding technology provides for the fast free cutting/grinding of even the most difficult to machine materials.  Bond matrixes are available for dry, mist and flood applications.  

METAL BOND - JUCHUANG DIAMOND WHEEL offers a comprehensive range of metal bond matrixes to handle a wide variety of applications.  Our metal bonds are designed with varying degrees of hardness and abrasion resistance to provide maximum performance and long life.  The most sophisticated metallurgical techniques and top of the line, premium diamond combines to guarantee maximum productivity and consistency.  Our goal is superior performance at an affordable price. 
 

Resin-cutting, grinding wheel presses, cutting disc, grinding wheel device

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

Safety rules before Grinder wheel using

  1, grinding machine must be someone responsible for regular checks to ensure the normal operation.

  2, wheel replacement, should cut off the power while installation should be checked prior to the grinding wheel for cracks, if not easy to identify the naked eye, can be a solid line of the wheel lifted a piece of wood and then gently tapping, listening to their sound. Metallic sound is excellent, Yasheng bad)

  3, grinding machine must have a solid right wheel cover from the wheel carriage must not exceed 5mm shall be used.

  4, when installing the wheel can not be on the nut too loose, too tight, should be checked before using the nut is loose.

  5. After installing the wheel, be sure to test idling 23 minutes, running to see whether the balance, the protection device is properly reliable, the test run should arrange two staff members, one of whom stood side wheel is actuated wheel and, if abnormal, by another person in the distribution cabinet immediately cut off the power. To prevent accidents.

 6, where the user should wear protective glasses, can not be positive on the wheel, but should stand on the side. When using the grinder, are not allowed to wear gloves, cotton yarn and other things prohibited the use of grinding tools package.

 7, should be checked before using the wheel is intact (there should be no cracks, cracks or disability) wheel shaft are securely installed, and reliable. Between the grinding machine and whether the debris shield, whether compliance with safety requirements, confirm no problem

Structures Of Diamond Grinding Wheel

Diamond grinding wheel is suitable for a variety of materials forage to concentrate grinding surface grinding, cylindrical grinding, internal grinding, and cutting. For example: carbide, ceramics, magnetic materials, tungsten steel, semiconductors, glass, gemstones.

The structure of gridning wheel generally consists of the active layer, the substrate, the buffer layer consists of three parts.

1, the working layer, also known as diamond layer, made of abrasive, binder and filler, is working part wheel.

2, also known as non-diamond layer, transition layer, the binding agent, metal powder and a filler, is fixedly connected to the part of the diamond layer on the substrate.

Our large supply of diamond, CBN grinding wheel, disc, cutter. My company has advanced production and processing equipment, strong technical force, strict means testing. All products produced in accordance with national standards.

3, the substrate for receiving the abrasive layer and the use of securely held on the grinding machine spindle flange. General metal binding agent selected steel products, alloy powder as a matrix;

Resin binder be aluminum, electrical wooden base. It made of aluminum, steel or bakelite processing, support from the working layer and chucking abrasive effect.

The quality of the grinding wheel molding and use of precision level and the substrate are a great relationship. When using a diamond grinding wheel drill trench requires a higher feed rate. In order to ensure a high feed rate, cutting sharp require binding agent system.

Vibration is an enemy of finishing

In grinding wheel dressing, effectively reduce the vibration, to avoid the grinding wheel surface traces of finishing, collisions and damage repair tools, etc, is crucial. This means that also must be a balance of grinding wheel, which is decided by the structure characteristics of the grinding wheel itself. The stand or fall of uneven density and the wheel geometry, will affect the natural balance of a grinding wheel. So choose a high quality of the grinding wheel is also very important. If is a high quality of the grinding wheel, the proper installation which can keep balance of grinding wheel is very good. According to the grinding wheel manufacturer factory instructions, grinding wheel with an up arrow, which shows the light while the wheel after rough balance. Root tree arrows, then the user can pay attention to dressing grinding wheel, make its reach dynamic equilibrium. Cooling fluid filling evenly, sometimes can also help the wheel balance.

As much as possible in order to prevent vibration, the operator will make dressing tools strong ground clamp on the holder and have the smallest trailer, only in this way can make the dressing tool has a strong enough rigidity. If the diamond tool in the process of finishing not firm clamping, hard to avoid can cause serious noise, vibration, make the surface of the parts produced tiny ripples, the surface strain of the parts and cause some damage for dressing tools.