A good mechanical process engineer must be a good processing equipment application engineer, who is proficient in all kinds of knowledge of the machine tools. Introduce the most common turning, milling, planing, grinding, boring, drilling, wire cutting and other processing equipment in the mechanical processing industry, and understand the type, scope of application, structural characteristics and processing accuracy of these processing equipment. work piece clamped by fixture Lathe 1) TYPE OF LATHE The types of lathes include: instrument lathes, single axle automatic lathes, multi axle automatic or semi-automatic lathes, return wheel or turret lathes, crankshaft and camshaft lathes, vertical lathes, floor and horizontal lathes, profiling and Multi Tool lathes, axle spindles and gear cutting lathes, etc. Vertical lathes and horizontal lathes are commonly used in the machinery industry. 2) APPLICABLE SCOPE OF LATHE PROCESSING A. The horizontal lathe is suitable for turning inner and o