| 摘要 |
PURPOSE:To easily align molds by simultaneously performing electric discharge machining of guide pin holes having a common core so as to utilizing said holes, when a set of the molds consisting of a punch and a punching die used for a press mold are prepared by electric discharge machining. CONSTITUTION:After a punch 14' equipping plate shaped rising parts 15, whose end is formed in a trimming die shape, is prepared by electric discharge machining, a die machining electrode 21 is provided in each end of said rising parts 15 while electrodes 22 made of graphite machining guide pin holes 25 are adhesively implanted. Electric discharge machining of punching holes 24 and the guide pins holes 25 is simultaneously performed by said electrodes 21, 22, thus a die 23 is produced. And then, removing the electrodes 21, 22 and mounting guide pins in place of the electrodes 22 to be fitted into the guide pin holes 25, molds of the punch 14' and the die 23 can be aligned with a less amount of labor further with more easiness. |
