Roll turning lathe is driven by power source -transmission unit-executive component,thus forming a transmission chain.During the cutting process, the machined surface is obtained by a relative movement of the tool and the workpiece mounted on the roll lathe.Through the cutting work piece rough to obtain the required surface shape.The working surface of the components mainly includes flat, cylindrical, conical surface and various forming surfaces. The common surface of the workpiece has a flat surface, a rotating surface, a thread, a gear tooth forming surface. These surfaces are linear surfaces.