公开(公告)号：US06383447B1

公开(公告)日：2002-05-07

申请号：US09610474

申请日：2000-07-05

申请人： Toyoshige Nakata ,  Tadaaki Shimada ,  Tatsuhiro Iio ,  Toshimasa Fujita ,  Toshimi Ikeda

发明人： Toyoshige Nakata ,  Tadaaki Shimada ,  Tatsuhiro Iio ,  Toshimasa Fujita ,  Toshimi Ikeda

IPC分类号： B22F302

CPC分类号： B30B11/02 ,  B22F5/08

摘要： An intermediary die 10 is provided with inner circumferential helical teeth r, a lower punch 7 is provided with outer circumferential helical teeth p, and an upper punch 8 is provided with outer circumferential helical teeth q, respectively. When the intermediary die 10, the lower punch 7 and the upper punch 8 all engage to manufacture helical gears by compacting powdered materials, lateral displacement (phase displacement) of a phase guide 11 which is adapted to engage with the upper outer punch 8a, is forcibly corrected to allow it to return to its original position, from the time when the load of the upper outer punch 8a is reduced to when the intermediary die 10 is released. There is also provided an escape surface on the pressing surface of the upper outer punch 8a. The escape surface is designed to reduce the slide contact force developed on a compacted product Ga when the upper outer punch 8a and the compacted product Ga are respectively displaced in a lateral direction.

摘要翻译： 中间模具10设置有内周螺旋齿r，下冲头7设置有外周螺旋齿p，上冲头8分别设置有外周螺旋齿q。 当中间模具10，下冲头7和上冲头8都接合以通过压实粉末材料制造斜齿轮时，适于与上外冲头8a接合的相导向件11的横向位移（相位移动）是 从上部外冲头8a的负载减小到中间模具10被释放的时刻被强制地修正为允许其返回到其原始位置。 另外，在上外侧冲头8a的按压面上设置有脱离面。 逃逸面被设计成当上部外冲头8a和压制产品Ga分别沿横向方向移位时，减小在压制产品Ga上产生的滑动接触力。