Device for automatically eliminating clearance between iron core rivets of motor and assembly method

The invention discloses a device for automatically eliminating a clearance between iron core rivets of a motor and an assembly method. The device mainly comprises a loading station, a rivet mounting station, a riveting station, an unloading station and a 200TC-type oil hydraulic press, wherein the loading station, the rivet mounting station, the riveting station and the unloading station are mounted in the same horizontal plane on an equipment rack, and the four stations can rotate mutually; the 200TC-type oil hydraulic press consists of 48 upper and lower independent continuously-rowed oil cylinders; each group of upper and lower oil cylinders are used for riveting one rivet of one iron core, the upper oil cylinders are used for pressing a cap of the corresponding rivet, and the lower oil cylinders are used for upwards pressing a flat head of the corresponding rivet so as to deform the flat head of the corresponding rivet, and thus a plurality of iron cores are assembled into a whole body; when each group of