A fault detection mechanism for a progressive die of a motor core comprises a minitype travel switch, a fault feeler lever, a fault sliding head and a fault correcting pin, wherein the minitype travel switch, the fault feeler lever, the fault sliding head and the fault correcting pin are connected with a
machine tool controller. The minitype travel switch is fixed to an upper die base provided with a guide pin. The trigger end of the minitype travel switch makes contact with the end, close to the minitype travel switch, of the fault feeler lever, and a
bulb structure of the other end of the fault feeler lever makes contact with a side face clamping groove of the fault sliding head sliding along a first through hole of the upper die base. The
tail end of the fault correcting pin stretches out of a through hole of a stripper plate. The fault correcting pin and the guide pin are arranged in parallel, and a guide pin
insertion hole and a fault correcting pin
insertion hole are formed in the corresponding positions of the lower die base and a female die. The fault detection mechanism for the progressive die of the motor core has the advantages that the phenomena that waste workpieces are generated and
stamping cannot be carried out normally when mis-feeding and uncompleted feeding occur in a high-speed automatic
punching process of the progressive die are avoided, the service life of the progressive die is guaranteed, and the fault detection mechanism for the progressive die of the motor core is suitable for match production of various motor cores, and the quality of punched motor cores is improved.