Stator core manufacturing method and stator core

The invention discloses a stator iron core manufacturing method, and belongs to the field of motors, the end part of a stator iron core is pressed by adopting a pressing block, the pressing block is provided with a pressing surface, the pressing surface is a plane, the pressing surface is circular, the radius of the pressing surface is R # imgabs0 #, d is the radius of a through hole, alpha is a material coefficient, and l is the length of a tooth part; a welding device is arranged in the direction perpendicular to the stator laminations, the welding device welds the tooth portions of the laminations at the ends of the stator core, the welding track of the welding device is circular and located between the outer edge of the abutting face and the tooth roots of the tooth portions, and the number of the laminations welded by the welding device is larger than or equal to 2. After the tooth parts of the stator laminations at the end parts are mutually welded, the structural strength of the tooth parts is increase