Manufacturing method and manufacturing device for rotary electric machine core

A manufacturing device for a rotary electric machine core that is a rotor core or a stator core, the manufacturing device comprising:

• a pressurization mechanism that includes a base and a pressurization member arranged on both sides of a laminated body in a lamination direction, respectively, the laminated body being configured by laminating a plurality of steel plates, each of the steel plates being made by covering a steel plate body with an insulating film, the pressurization mechanism pressurizing the laminated body as at least the pressurization member is made to advance and retract in the lamination direction of the laminated body;
• a heater that heats the laminated body;
• a pressure sensor that detects surface pressure as detected pressure, the surface pressure being received by the pressurization member from the laminated body;
• a temperature sensor that detects temperature of the laminated body as detected temperature;
• and
• a controller that controls drive of the heater and the pressurization mechanism, wherein the controller is configured to execute in parallel:
• a heating mechanism in which the heater is driven to heat the laminated body until the detected temperature reaches specified target temperature;
• and
• a pressurization mechanism in which the pressurization member is moved in a direction towards the laminated body until a pressure load reaches a target load that is larger than a specified fastening load, the pressure load being obtained as the detected pressure and a pressing surface area, that is a contact area between the pressurization member and the laminated body, are multiplied, the pressurization member is then made to stand still until the pressure load is reduced and becomes constant as a value smaller than the target load, and, once the pressure load is constant, the pressurization member is moved in a direction away from the laminated body.