The hardness of the cutting wheel has a significant effect on the quality of the machined surface and the grinding efficiency. The hardness of the grinding wheel is high, the abrasive grains are not easily peeled off, and the contour of the abrasive cutting edge is easily maintained, so that the workpiece has low roughness and high precision. However, if it is too hard, the blunt abrasive grains still remain on the surface of the grinding wheel, which not only reduces the grinding efficiency, but also increases the frictional extrusion on the surface of the workpiece due to the passivated abrasive grains, grinding force and grinding. The heat is significantly increased to increase the surface roughness of the workpiece, and it is also prone to defects such as burn cracks.
On the contrary, if the hardness of the grinding wheel is low, the blunt abrasive grains are easy to fall off, the sharp abrasive grains are often maintained on the working surface of the grinding wheel, the grinding efficiency is improved, and the heat generation is small, and the surface burn of the workpiece can be avoided, but the workpiece precision and The surface roughness is worse. When the hardness is too low, the abrasive particles will fall off under the sharp state, so that the grinding wheel quickly loses the geometric shape of iK, the workpiece twist is difficult to control, and the surface of the workpiece is also easily scratched by the falling abrasive, resulting in surface roughness. Ascending, while the grinding effect will also decrease.
What is the impact of the hardness of the 4 1/2 super thin cutting disc wheel on the machining? In general, it has the following effects:
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