There are many different shapes and sizes of grinding wheels and abrasive tools. Depending on the different grinding materials, bonding materials and manufacturing processes, each type of grinding wheel has a certain range of application. Improper selection will directly affect machining accuracy, surface roughness and production efficiency. Therefore, the appropriate grinding wheel must be selected according to the specific situation. How to choose the right grinding wheel? Summarize the commonly used grinding wheels in grinding so that everyone can clearly choose the grinding wheel. First, the choice of ordinary grinding wheel
1, the choice of abrasives The choice of abrasives mainly depends on the workpiece material and heat treatment method
When grinding materials with high tensile strength, choose abrasives with high toughness.
When grinding materials with low hardness and high elongation, brittle abrasives should be selected.
When grinding high-hardness materials, choose abrasives with higher hardness.
Select abrasives that are not easy to process for chemical reactions.
The most commonly used abrades are brown fused alumina and white fused alumina, followed by black silicon carbide and green silicon carbide, and the rest are chromium corundum, single crystal corundum, microcrystalline corundum and zirconium corundum.
Brown corundum grinding wheel: Brown corundum has high hardness and toughness. Suitable for grinding high tensile strength metal, such as carbon steel, alloy steel, malleable cast iron, hard bronze, etc. This kind of abrasive has good abrasive performance and wide adaptability. It is usually used to remove large residual rough grinding. It is cheap and can be widely used.
White corundum grinding wheel: the hardness of white corundum is slightly higher than that of brown corundum, and the toughness is lower than that of brown corundum. The abrasive particles are easily broken during grinding. Therefore, the grinding heat is small, and it is suitable for manufacturing grinding wheels for grinding hardened steel, high carbon steel, high-speed steel and grinding thin-walled parts, and the cost is higher than that of brown corundum.
Black silicon carbide grinding wheel: Black silicon carbide fragile and sharp, hardness is higher than white corundum. Suitable for grinding materials with low mechanical strength, such as cast iron, brass, aluminum and refractories.
Green silicon carbide grinding wheel: green silicon carbide has higher hardness and brittleness than black silicon carbide, sharp abrasive particles, good thermal conductivity, suitable for grinding hard and brittle materials such as cemented carbide, optical glass, ceramics.
zirconia corundum grinding wheel: suitable for grinding tools, measuring tools, instruments, threads and other surface processing of high quality workpiece.
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