Turning parts is the use of lathes on the lathe to produce a part of the product, the use of rotational motion of the workpiece and the linear motion or curve of the tool to change the shape and size of the blank, it is processed into the requirements of the drawings. Turning machining is the method of cutting the workpiece with the workpiece relative to the tool rotation on the lathe. The cutting energy of the turning process is mainly provided by the workpiece rather than by the tool. Turning is the most basic and most common cutting method, which occupies a very important position in production. Turning is suitable for machining rotary surface, most of the workpiece with rotary surface can be processed by turning method, such as cylindrical surface inside and outside, inner and outer cone surface, end face, groove, thread and rotary forming surface, etc., the tool used is mainly lathe knife. The precision of turning machining is generally it11-it7, some can reach IT6, and the surface roughness Ra can reach 12.5-08um.
Parts made from turning are called turning parts, and there are many types of turning parts, which are famous for hard turning to maintain the thermal stability of parts.