The structure and operating principle of the progressive die with automatic feed by hook for piercing and blanking used on a general press were described. The blank layout form was presented. Taking upper die traveling down as the power, the die was fed by a mechanism of cam driver and slide block as well as the hook mechanically jointed on the slide block. There was a mechanism for avoiding strip back on the die following right move of the slide block and the hook. The die could finish the working procedures of auto-feed, piercing and blanking by single stroke of the press. The die is compact in structure, reliable in running,convenient in operation and high in production efficiency.
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