There are many different shapes and sizes of grinding wheels and abrasive tools. According to different abrasive materials, bond materials and manufacturing processes, each type of grinding wheel has a certain scope of application. Improper selection will directly affect machining accuracy, surface roughness and production efficiency. Therefore, the grinding wheel must be selected according to the specific situation. How to choose the grinding wheel correctly? Summarize the grinding wheels commonly used in grinding, so that everyone can clearly choose the grinding wheel.
1. Selection of ordinary grinding wheels
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 used.
When grinding high-hardness materials, choose abrasives with higher hardness.
Choose abrasives that are not easy to process for chemical reactions.
The most commonly used abrasives are brown corundum and white corundum, 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 metals with high tensile strength, such as carbon steel, alloy steel, malleable cast iron, hard bronze, etc. This abrasive has good grinding performance and wide adaptability. It is usually used to remove large amounts of coarse 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. During the grinding process, the abrasive particles are easily broken. Therefore, the grinding heat is small, suitable for manufacturing hardened steel, high carbon steel, high speed steel and grinding thin-walled grinding wheels, the cost is higher than brown corundum.
Black silicon carbide grinding wheel: Black silicon carbide is fragile and sharp, and its hardness is higher than that of white corundum. Suitable for grinding materials with low mechanical strength, such as cast iron, brass, aluminum and refractory materials.
Green silicon carbide wheel: Green silicon carbide has higher hardness and brittleness than black silicon carbide, sharp abrasive grains, good thermal conductivity, suitable for grinding hard and brittle materials such as cemented carbide, optical glass, ceramics and so on.
Chrome corundum grinding wheel: suitable for grinding high-quality workpieces such as cutting tools, measuring tools, instruments, and threads.
