切削离不开刀具,刀具在切削材料时要磨损,刀具磨损到一定程度时就丧失切削能力。如用丧失切削能力的刀具再进行切削,就会降低生产率和产品质量,所以测量和控制刀具的磨损是一件极其重要的事情,尤其在评定刀具切削性能和被切削材料的可加工性时,刀具的磨损往往被用来作为评定的标准,此时,对刀具磨损的测量精度就提出更高的要求。刀具在切削时,在刀刃前刀面和后隙面上都会有磨损,但在多种情况下都是以后隙面的 Cutting is inseparable from the tool, the tool in the cutting material to wear, the tool wear to a certain extent, the loss of cutting power. Cutting and cutting tools with loss of cutting ability will reduce productivity and product quality. Therefore, measuring and controlling tool wear is an extremely important issue. Especially when evaluating the cutting performance of cutting tools and the machinability of cut materials, Tool wear is often used as a measure of the standard, at this time, the measurement accuracy of tool wear put forward higher requirements. Tool cutting, cutting edge in the rake face and backlash will wear, but in many cases are backlash