Cast-aluminum rotor core production process based on progressive punching of closed slots

The invention relates to a production process of a cast-aluminum rotor iron core based on progressive punching of closed slots, belongs to the technical field of motors, and solves the technical problems of air exhaust, high probability of shrinkage cavities and slim strips of a motor, high probability of slim strips and broken strips caused by blocking slots among split iron cores in an existing high-pressure aluminum casting process. According to the solution, the production process for the cast-aluminum rotor iron core based on the progressive punching closed slots comprises the following steps: 1) determining the length of the iron core; 2) calculating rotor skew data; (3) a groove inclination detection device is designed, the groove inclination detection device comprises a dummy shaft and a taper key, and the dummy shaft comprises a dummy shaft body and a bottom plate arranged below the dummy shaft body; 4) detecting the inclination of the groove; 5) selecting a qualified iron core; and 6) combined casti