Machining technology includes machining and CNC machining two categories.Machining refers to the drawing shape and size requirements. The process of accurately removing excess material in blank by traditional machining makes blank meet the form and position tolerance required by drawings. Modern machining is divided into two categories: manual machining and CNC machining. Manual processing refers to the operator's operation of lathes, milling machines, grinding machines and other mechanical equipment for precise processing of the workpiece, suitable for single piece, small batch parts production. CNC machining is the operator to CNC equipment set the program language, CNC through the identification and interpretation of the program language to control the axis of CNC machine tools automatically according to the requirements of processing, suitable for large quantities, complex shape parts processing. The specific process of mechanical processing mainly includes turning, milling, grinding, pliers, drilling, boring, planing, punching, sawing, and including electroplating, heat treatment, wire cutting, forging and other methods.

When selecting machining methods, factors such as processing quality, production efficiency and economy should be considered. The selection of surface processing methods should meet the requirements of processing quality, production efficiency and economy at the same time. For example, for some machining surfaces that require precise control, machining methods such as precision cutting and grinding can be selected; For some processing surfaces that require large areas of material removal, milling, planing and other processing methods can be selected.

In the machining process, there are also some important concepts to understand, such as the process, installation and station, work step and walking tool. The main basis for distinguishing the process is whether the work place or equipment is changed, and whether the content of the completed part of the process is continuous. Installation and station refers to occupying a correct position on the machine tool or fixture before the workpiece is processed. Then the process of clamping is called clamping. After the workpiece or the assembled unit has been clamped once, the content of the part of the process completed is called installation. In order to complete a certain process content, after the completion of a workpiece clamping, each position occupied by the workpiece or assembly unit and the moving part of the fixture or equipment relative to the fixed part of the tool or equipment is called the station. The process step refers to the part of the process that is continuously completed when the surface to be machined or the connecting surface at the time of assembly is unchanged from the cutting or assembly tool. In a working step, if the metal layer cut off the surface of the machined is very thick, it needs to be cut several times, and each cutting is a cutting tool. A work step may consist of one or several knife walks.