The machine tool of Guangdong mechanical processing plant produces parts with special geometry and precise size by removing chips from plastic materials. The latter is waste, which is caused by the long and continuous changes of plastic materials such as steel. From the point of view of treatment, it is useless. It is very easy to deal with the broken chips produced by cast iron. Guangdong machining plant implements five basic metal removal processes: turning, planing, drilling and milling. All other metal removal processes are modified from these five basic procedures. For example, boring is internal turning; Reaming, tapping and reaming are holes drilled for further processing; Gear machining is based on milling operation. Polishing and grinding are the deformation of grinding and removing abrasive. Therefore, there are only four basic types of machine tools in Guangdong mechanical processing plant, which use cutting tools with specially controllable geometry: 1. Lathe, 2. Drilling machine, 3. Milling machine, 4. Grinder. Chip is formed in grinding process, but the geometric shape of abrasive is uncontrollable. The quantity and speed of material removal by various machining processes in Guangdong mechanical processing plant is huge, just as in large-scale turning, or very small, such as grinding and ultra precision machining, only the high point of the surface is removed. A machine tool performs three functions: 1. It supports the workpiece or fixture and tool; 2. It provides relative motion for the workpiece and tool; 3. In each case, it provides a series of feed rates and generally up to 4-32 kinds of speed options.