structure
Diamond wheel construction work generally consists of layers, substrate, buffer layer composed of three parts.
Working layer, also known as diamond layer, made of abrasive, binder and filler, is working part wheel. Also known as non-diamond layer the buffer layer, the binding agent, metal powder and a filler, is fixedly connected to the part of the diamond layer on the substrate.
Substrate for receiving the abrasive layer, and when used with a flange securely held on the grinding machine spindle. 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.
characteristic
Characteristics include a wide diamond wheel diamond abrasive, particle size, density, size and shape of the binding agent.
use
Since diamond abrasive with the characteristics (high hardness, high compressive strength, wear resistance), making it an ideal tool for diamond abrasive grinding hard and brittle materials and carbide in grinding, not only high efficiency, precision high and good roughness, abrasive consumption, long service life, but can also improve working conditions. Low iron content of the metal and non-metallic hard and brittle material is widely used in ordinary abrasive difficult to process, such as carbide, alumina ceramic, optical glass, agate gem, semiconductor materials, stone and the like.

What type of abrasive Grinding wheel is?

Grinding wheel is to add a binder in the abrasive, the porous body through compacts made of dried and calcined. Due to the abrasive, bond and different manufacturing processes, characteristic differences between the grinding wheel is large, so the grinding process quality, productivity and economy have an important impact.

Characteristics of grinding wheel is mainly determined by the abrasive particle size, binder, hardness, structure, shape and size and other factors; abrasive wheel is the largest amount, the most widely used method of using surface rotating at high speed when used, can be of metal or cylindrical, round, flat face and a variety of other non-metallic type workpiece roughing, semi-finishing and fine grinding and grooving and cutting and so on.

The press can be divided into ordinary abrasive abrasive (corundum and silicon carbide) abrasive grinding wheel and the natural and super abrasive (diamond and cubic boron nitride grinding wheel) wheel; according to the shape can be divided into flat-shaped grinding wheel, bevel wheel, cylindrical grinding wheel , cup wheels, disc wheel and so on; press binding agent can be divided into ceramic wheel, resin wheel, rubber wheel, metal grinding wheel. The main parameters of the abrasive wheel, viscosity, hardness, binding agents, shape, size and so on.

In the production process to use diamond grinding wheel on the belt, the general grinding wheel is necessary to remove the cleaning operation for 5-7 days, there is grinding down rubber crumbs above, after the high temperature friction and firmly attached to the diamond surface, it is difficult cleaning.

Cleaning requirements: (1) to environmental protection, non-one can not be a halogenated hydrocarbon. (2) can not damage the diamond grinding wheel.

Gringding Wheel In Mechanical Descaling

This method is currently applied widely as a descaling method, the principle is the use of impact and friction effectively remove rust and dirt. This method is commonly used in portable electric Grinding Wheel, electric brush, brush pneumatic, derusting guns. The advantage of this method is that rust quality, efficiency are high, but the drawback is that these tools also require manual operation, greater labor intensity of geometrically complex parts and precision is not applicable, not suitable for large-scale blasting needs. It is more extensive or spraying and blasting two treatments rust dirty methods currently applied.

(1) This method is mainly blasting sand blasting, shot blasting, vacuum blasting, high-pressure and high-pressure water, sand and water.

(2) This is a high-speed shot blasting iron pellet (pellet or other materials) the impact of a use of high-speed rotating impeller blast wheel thrown, with the friction between the parts of the surface to clean rust and achieve the purpose.

How to prevent the broken 2 wheel in the idling

In grinding operation rules have a provision, requires the operator to install new grinding wheel before grinding should let it idle for a few minutes, the purpose is to observe the possibility of broken. Wheel the reason why the idling broken, mainly because it in the rotation of the front has a crack. Therefore, the prevention of such broken should be to prevent the wheel in the transport, storage and installation of the cracks.

2.1 correct grinding wheel transport mode and method

(1) long distance transport, handling should be complete package, available has no significant impact on the environment of soft materials will wheel fully infilled, to prevent the handling process of vibration and impact.

(2) short distance transport:

A. handling to prevent the wheel from falling or hit by the impact of such impact;

B. must scroll, to spread on the ground to buffer wood, rubber or straw bags such as, in the gently rolling;

C special heavy grinding wheel should be used when handling special handling tools, the use of tools should be equipped with soft materials of the liner, the vehicle should be equipped with inflatable tires.

However in the practical work, we can often see short distance conveying wheel in did not take any protective measures, in the factory on the road rolling wheel, a solid wheel cart to transport the wheel (especially in the trenches cut grinding wheel), they are ignoring wheel transport regulations on the storage, irresponsible to the personal safety of the operators, safety accident hidden trouble.

2.2 correct grinding wheel keeping method

(1) the requirements of the storage environment:

A. grinding wheel should be placed in a dry, temperature change is small, and the room temperature should not be less than 5 degrees celsius;

B. where there is no vibration;

C rubber bonded grinding wheel can not contact with oil, resin bond wheel should not be in contact with alkali;

D. rubber bonded grinding wheel and resin bond grinding wheel storage temperature is best at 5 degrees 20 degrees Celsius, the relative humidity should not be greater than 60%, to avoid direct sunlight and close to the heat sink, drainage device.

(2) requirements for storage space and manner

A, the wheel should not be piled up at random, should be stored within the appropriate stent, cabinets or drawers, should be in accordance with the specifications are placed separately, storage should be with signs, in order to avoid confusion and error.

B. placement method should be considered the shape and size of the grinding wheel, the larger diameter or thickness of the grinding wheel should be upright or slightly inclined placed, thinner and smaller grinding wheel should be stacked, but stacked height not more than 60 a 500 0mm;

C. small wheel diameter (diameter 50 mm below) be used rope on the safe, bowl, cup and saucer shaped wheel should be to the bottom face under a stack, but placed height can not be too high.

D. rubber or resin sheet grinding wheel stack height to below 200 mm, and in the upper and lower put a flat iron plate to prevent deformation of the grinding wheel, with the sharp edge of the sheet wheel shall be stacked and in the middle pad to pad thick paper or other soft material);

E. resin bond, rubber bonded grinding wheel in the process of storage, the bond will be aging to reduce its strength, so the storage period of the grinding wheel generally can not be more than one year. The grinding wheel must be re examined before it can be used after the storage period;

To ensure that vehicle braking performance wheels for processing

To ensure the car has good braking performance, both end surfaces parallel to the brake disc requires a degree of 0.005mm, roughness Ra <0.4μm, both end faces have decorative patterns. In order to ensure equal thickness, parallel and decorative patterns, it requires the use of a fixture pole while turning both end faces, and then double-wheel grinding process while double-end, so far there are no suitable special machine. Manufacturers can only be used after the completion of the common procedure modernization of machine tools, precision machining it is not only low, low efficiency and poor security, labor-intensive. Due to the required accuracy, processing of products barely into two international auto parts market, can not be directly supporting the world's leading automobile manufacturers.

Proper installation and use of the grinding wheel

  It should be carefully checked before installation of the grinding wheel without deformation, hoarse voice, cracking and the maximum line speed indicated whether the angle grinder is consistent with a cutter speed, error-free after installation should confirm mounted flat disc Kafa Lan degree and diameter and gasket meets the requirements. When the ban solid wheel, only allowed to use the specific manual wrench, prohibited the use of clamps or supplement beating tools.

  When tightening, pay attention to the tightness of the nut or screw fastening wheel drive is not enough to produce the degree of slip is appropriate to prevent the tightening force caused by excessive wheel breakage. After tightening the flange after installation Put the protective covers, the operator sideways and rotational direction of the grinding wheel and a certain angle commissioning of power for 30 seconds, no abnormality can be put into use. When using the technological requirements should control the amount of feed can not be forced to feed and impact wheel

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Grinding wheel

Superior performance of the grinding wheel must have sharp grinding at the same time, good self-sharpening and high durability features. Manufacturing and grinding wheel

Main consideration when combined with agent, concentration of abrasive, grinding wheel and abrasive hardness.

1

Combining with the agent

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Four of abrasive binder (resin, ceramic, metal, electroplating), ceramic bond

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Abrasive tool development

The fastest. Worldwide, the ceramics

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The proportion of abrasive tool has been developed from

20

century

80

s

4%

Up to now

50%

Above, increase

Speed rapidly. Because of the ceramic

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Abrasive grinding with high efficiency, good shape retention, high durability, easy to repair and abrasive

Powerusageeffectiveness high (as

75%

Above, the rest of the type of binder for

5060%

Grinding wheel long life and other advantages, thus become a high efficiency, high precision

The degree of grinding the grinding tool of choice. At present, used in grinding of camshaft

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Grinding wheel are all made of ceramic bond.

2

Abrasive selection

Main body of grinding, abrasive abrasive, its performance is good or bad directly affect the grinding effect.

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Abrasive corundum grinding

Compared to material has higher hardness and strength, thus cutting sharp and wear-resisting. Grinding processing such high strength of the camshaft

Next, the use of

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Grinding is the best choice. Different type of

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Abrasive, due to the difference of manufacturing process, and its crystal morphology, star

Particle shape also each are not identical, each with different strength, thermal stability, resistance to chemical erosion and breakage feature. Should be based on"

Mixture of species, grinding workpiece and grinding way is different, choose different type of abrasive. Need to point out

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Abrasive in the high

Under the temperature easily react with water and alkaline oxide and make its structure is damaged, which is to choose the types of grinding fluid, pressure

And traffic factors must be considered.

3

The concentration of

Grinding wheel concentration said when grinding wheel face of the grinding grain number per unit area to grinding, high concentration

Can bring higher grinding ratio,

200%

The concentration ratio

100%

Concentration of grinding wheel life is long

45

Times. At present, high speed, high efficiency grinding were adopted

High concentrations of grinding wheel, such as import ceramic grinding camshaft grinding machine matching

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Grinding wheel concentrations are generally

200%

4

hardness

Abrasive hardness grade said the size of the binder on the abrasive holding force, manufacturers one of the important indices for process control, is also used

The main families choose abrasive performance parameter. Wheel hardness uniformity and stability and hardness of rational choice is to ensure the quality of grinding

Important premise.

Foreign ceramic

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Grinding wheel generally have

37

A hardness level to choose from,

Domestic has yet to develop

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Grinding wheel

(package

Enclosed diamond abrasive) hardness testing standard, the manufacturer only in formula to control the hardness.