Milling Machine Processing A machining method in which the forging rotates as the main motion and the milling cutter makes the feed motion. In the machining process of the forging factory's milling machine, the main motion is the rotational movement of the forging. It is especially suitable for processing wheel forgings, machine tool spindle forgings, etc. with rotating surfaces. The feed motion is the linear movement of the cutting tool.   Grinding Processing A method of processing the surface of a forging in a forging factory, where the grinding wheel rotates at a high angular velocity. Generally, the processing using a grinding wheel is called an external grinder. During the grinding process, the self - sharpening effect of the grinding wheel is unique compared to other cutting tools. It is different from the cutting edges of ordinary cutting tools.   Boring Processing A machining method in which the boring tool rotates as the main motion, and either the forging or the boring tool makes the feed motion. Boring processing is mainly carried out on milling - boring machines and boring machines. Boring is a further processing of drilling holes in forgings. Boring can expand the hole diameter, improve the precision, reduce the surface roughness, and can effectively correct the inclination of the original hole centerline. Boring can be divided into rough boring, semi - finish boring, and finish boring.   Planing Processing A machining method in which the planer tool and the forging perform a relative linear motion in the horizontal direction. Planing is a major method for planar processing. It is a commonly used processing method for planar processing in the single - piece and small - batch production of forgings. Common planer - type machine tools include shapers, double - housing plan