Lapping Pressure Automatically Controlling Method in High Speed Lapping

The computer control technique is used to control lapping pressure on-line in this paper. In the starting period of lapping, contacting state between the workpiece surface and lapping tool surface is not ideal case. In order to reduce the impact between the workpiece and lapping tool, in starting lapping, the lapping pressure is lower, and then increases gradually until a certain higher pressure reached and keeps this pressure lapping continually. During this period, the machining efficiency at such high pressure is higher. When lapping finished, the lapping pressure decreases gradually, which can assure the quality of the machined workpiece surface. When this method is used, not only the lapping accuracy can be assured, but also the requirements for an operator are relaxed. Moreover, supplementary machining time is shortened and the lapping efficiency is increased.