For pure electric vehicles, the manufacture of its powertrain no longer requires traditional internal combustion engines, and accordingly no longer requires engine blocks, cylinder heads, crankshafts, camshafts and connecting rods and other components. However, even in the production of pure electric vehicles, there are still a considerable number of parts and components whose demand for metal cutting remains basically unchanged. In addition, a new part of the workload that requires metal cutting processing has been added. For example, in the manufacture of new energy vehicle drive motors, metal cutting processing is required for the motor shaft, motor housing, etc., and metal cutting processing for newly added various types of molds. etc. (including all kinds of special processing).