Tool wear in the form of tool wear of the tool in the normal cutting process

Tool wear in the form of tool wear is the cutting tool is in the normal process, due to physical or chemical action, the tool has the effect of wear. In the cutting process, the tool rake face and flank face with chip and workpiece, and generates  polycrystalline diamond , while in the contact  synthetic diamond powder  high temperature and pressure. Therefore, as for the cutting, before the flank wear will occur. Tool wear has the following three forms. The rake face of tool wear shape wear (crater wear) in the cutting of plastic material, if the cutting speed and cutting large thickness tends to grind the surface of the first crescent knife.