A new method for checking the surface burn of parts

In mechanical products, many important parts such as bearings, gears, crankshafts, camshafts, piston pins and universal joints, etc., need to be ground after heat treatment. In contrast, the power consumption per unit of cutting area during grinding is far more than other processing methods, most of the converted heat will enter the workpiece surface, so it is easy to cause changes in the metallographic structure of the processed surface. In the case of improper selection of process parameters, cooling methods and abrasive conditions, the workpiece is prone to appear a quite deep metallographic structure change layer (ie tempering layer) during the grinding process, accompanied by a large surface residual stress, even This leads to cracks, which is the so-called grinding burn problem.

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