Machining refers to the process of changing the overall dimension or performance of the workpiece through a mechanical device. According to the difference in processing methods, it can be divided into cutting and pressure processing.

In the production process, the process of changing the shape, size, position and nature of the production object to make it into a finished product or semi-finished product is called a process. It is the main part of the production process. The technological process can also be divided into casting, forging, stamping, welding, machining, assembly and other technological processes. The mechanical manufacturing technological process generally refers to the sum of the mechanical processing technological process of parts and the assembly technological process of machines. Other processes are called auxiliary processes, such as transportation, storage, power supply, equipment maintenance, etc. The technological process is also composed of one or several sequential processes. A process consists of several steps.