The selection of grinding wheel can be carried out with reference to the following principles:
(1) The material of the gear to be ground is usually quenched alloy steel and high-speed steel of various grades. The material of the grinding wheel should be white corundum, chrome corundum, or a mixed abrasive of the two.
(2) The higher the hardness of the tooth surface of the gear to be ground, the smaller the surface roughness parameter value, the softer the hardness of the grinding wheel, the finer the particle size, the higher the precision required for the gear to be ground, and the larger the grinding allowance. When it is better to use a grinding wheel of different particle size and hardness for rough grinding and fine grinding.
(3) When grinding with a forming grinding wheel, in order to avoid surface burn, a softer grinding wheel should be used; with CBN grinding wheel, the service life can be greatly extended.
(4) During dry grinding, the heat dissipation conditions are poor. The hardness of the selected grinding wheel should be soft, the grain size should be coarse, and the structure should be loose, but the influence on the roughness of the gear tooth surface should also be considered.
(5) When grinding the teeth with the worm wheel, in order to ensure the accuracy of the tooth shape, the smaller the modulus of the gear, the finer the grain size of the grinding wheel and the higher the hardness.
A variety of typical gear grinding machines. There are recommended grinding wheels, please refer to the corresponding instructions when selecting.
