Precision machining is the process of altering the shape, size, or performance of workpieces using machining equipment. According to the temperature state of the workpiece being processed, it is divided into cold working and hot working. Generally, cold working is carried out at room temperature without causing chemical or phase changes in the workpiece. Hot working, typically conducted at temperatures above or below room temperature, leads to chemical or phase changes in the workpiece. Cold working can be further classified into cutting and pressure working methods. Hot working processes include heat treatment, forging, casting, and welding.