Core block for motor, and method for producing core block for motor

A method for producing a core block that is for a motor and includes stacked electromagnetic steel sheets, the method comprising:

• edge formation machining using electrical energy or optical energy to form an entire perimeter of an edge on the electromagnetic steel sheets in the core block;
• and
• punching using press machining on the electromagnetic steel sheets after the edge formation machining using electrical energy or optical energy, wherein
• a site in the motor where the edge formation machining using electrical energy or optical energy is performed to form the entire perimeter of the edge on the electromagnetic steel sheets in the core block is an outer peripheral surface on a rotor core that is to be a gap section in the motor, or tooth tips in a stator core that are to be a gap section in the motor, and
• the punching is performed using the press machining to form some or the entire perimeter of the edge on the electromagnetic steel sheets in the core block at a portion in the electromagnetic steel sheets where the edge formation machining using electrical energy or optical energy has not been performed.