| 摘要 |
PROBLEM TO BE SOLVED: To provide an outpace processing method and a metal mold capable of shear-separating a part to be a scrap only with a cut-off blade part provided in a punch metal mold, when executing outpace processing of a work piece.SOLUTION: An outpace processing method is provided for executing outpace processing of a plate-like work piece W with a die metal mold 13 having a rectangular die hole 17 and a punch metal mold 1 having a punch blade part 5 freely engaging with/separating from the die hole 17, and includes the steps of: forming a half-blank processing part HB in which the three directions of both sides in the width direction of the die hole 17 and the advancing direction of the outpace processing, exist in a connection state to the work piece when the punch blade part 5 is engaged with the die hole 17; forming a tip side part T integral only with the half-blank processing part HB and breaking through and shearing a proper position between the half-blank processing part HB and the tip side part T only with the cut-off blade part 9 provided on an under surface of the punch blade part 5; repeating the step by the proper number of times; and shear-separating the half-blank processing part from the work piece in the final step. |
