Precise grinding head for inner tooth hole of pin wheel housing and grinding method

The invention discloses a precise grinding head for an inner tooth hole of a pin wheel housing and a grinding method. The grinding head comprises a mounting base, a first bracket, a gasket, a positioning mounting cover, a connecting shaft, a first angular contact ball bearing, a first rotor, a first spacing ring, a first grinding wheel gasket, a forming grinding wheel, a second grinding wheel gasket, a second spacing ring, a synchronous belt wheel, a second rotor, a third spacing ring, a second angular contact ball bearing, a locking spacing ring, a locking nut, a second bracket and a synchronous belt. The grinding head is relatively reliable and simple, is lower in cost, can satisfy the high-precision requirement of a precise speed reducer on the inner tooth hole, can synchronously grind one whole tooth and two half teeth, greatly improves the processing efficiency, is excellent in sealing effect, largely prolongs the service life, is convenient to replace the forming grinding wheel, largely widens the application range, is convenient for use, and is excellent in application prospect.