Lathes belong to processing machinery and are divided into ordinary lathes, automatic lathes, instrument lathes, and computer lathes. It performs radial or axial machining using a cutting tool by gripping the material and then rotating it. The application of automatic lathes and computerized lathes is becoming increasingly common nowadays. Because both of these methods are fully automated, the accuracy error caused by manual operation is reduced to the bottom point, and the processing speed is not slow, making them suitable for large-scale production. Most computer lathes nowadays are equipped with side turning tools and back turning tools, which means milling can also be performed on the lathe. The surface roughness of lathe machining is approximately between Ra0.4-1.6. Stamping uses pre made molds and punching machines for cold stamping processing, mainly for sheet metal processing. The processed materials are mostly sheet metal, and the processing speed is relatively good, suitable for large-scale production. The processing technology is divided into engineering molds and continuous molds. Engineering molds, also known as single punch molds, require several sets of molds for some complex parts. Continuous molds separate the shape of the product into several parts in one mold in the mold cavity, so that one stroke of the punch press processing is a finished product. Continuous punching machines can process three to four hundred products per minute.