What are the differences and working principles of lathes, broaching machines and grinders?

Lathe mainly uses the rotation of the workpiece and the linear motion of the tool to process the workpiece, and it can process all kinds of revolving surfaces on the lathe. Female buttons, threads and other parts; Broaching machine is a machine tool for processing various internal and external forming surfaces of workpieces with broaches. When broaching, the machine tool only has the linear motion of the broach, which is the main motion in the machining process, and the feeding motion is realized by the structure of the broach itself. Broaching machine can be divided into internal broaching machine and external broaching machine according to the nature of work. Broaching machine is generally hydraulic transmission, it only has the main movement and the structure is simple. Grinding machine is a workpiece between two grinding wheels, one of which plays a grinding role and is called grinding wheel; The other grinding wheel plays a driving role, which is called the guide wheel; The lower part of the workpiece is supported by the tray. The axis of the guide wheel forms an angle with the grinding wheel in the vertical direction, which drives the workpiece to rotate and feed longitudinally.