摘要 |
<P>PROBLEM TO BE SOLVED: To provide a planetary pinion case which has necessary strength and is manufactured with highly precision in a short period of time, and a press device to be a device for manufacturing the planetary pinion case. <P>SOLUTION: In the press device 1 to be the device for manufacturing the planetary pinion case, a lower die has a placing part 13 on which a stock material 2 for the pinion cases is placed and an upper die is provided with an internal helical gear punching part 10 which is rotatably supported and on the peripheral surface of which a helical gear is formed, and when performing press working by die clamping operation, pressing is performed while rotating the internal helical gear punching part 10 with respect to the stock material 2 for the pinion cases placed on the placing part 13. The internal helical gear is formed on the stock material 2 for the pinion case by press working and the internal gear is manufactured in a very short period of time. <P>COPYRIGHT: (C)2012,JPO&INPIT |