Stanzvorrichtung

摘要

A workpiece blanking apparatus (1) has a die (16), a pad (10) for holding a plate of metal on the die (16), a blanking punch (7) for depressing the plate (W1) on the die downwardly of the die to blank a workpiece (W2) out of the plate (W1), and a counterpunch (20) vertically movably disposed in the die in confronting relationship to the blanking punch (7) and movable downwardly with the workpiece (W2) blanked by the blanking punch (7). A counterpunch urging device (25) normally urges the counterpunch upwardly, and a holding mechanism (26) holds the counterpunch in a lowered position after the workpiece is blanked by the blanking punch until the blanking punch (7) is spaced from the workpiece, the pad (10) is spaced from the plate (W1), and the blanking punch (7) and the pad (10) are lifted to a predetermined position. The holding mechanism (26) releases the counterpunch (20) in the lowered position and allows the counterpunch (20) to displace the workpiece (W1) out of the die (16) when the blanking punch and the pad are lifted to the predetermined position.