公开(公告)号：US06199275B1

公开(公告)日：2001-03-13

申请号：US09306999

申请日：1999-05-07

申请人： Takashi Goitsuka ,  Kouji Nemoto ,  Masahiko Ryu ,  Yoshikatsu Nozawa

发明人： Takashi Goitsuka ,  Kouji Nemoto ,  Masahiko Ryu ,  Yoshikatsu Nozawa

IPC分类号： B23D1500

CPC分类号： B21J5/02 ,  B21K1/08 ,  F16C3/08 ,  Y10T29/49236 ,  Y10T29/49286

摘要： A steel material having a columnar configuration is subjected to forming by applying finishing processing performed after buster processing and coarse (preliminary) processing to obtain a configuration in which additive metal lump portions are combined with upper and lower portions of a shaft section having a circular cross section. In the following trimming processing, a shaft section is formed to have a configuration in which eliminative metal lump portions are cut and eliminated from right and left sides of the shaft section. In the following sizing processing, plastic flow is allowed to occur from the additive metal lump portions to the eliminative metal lump portions to obtain a shaft section having a circular cross section. When the shaft section is formed by effecting the processing steps as described above, a method for forming crank shafts and a method for producing crank shafts can be obtained, which make it possible to decrease the number of processing steps so that the processing cost is reduced and the processing time is shortened.

摘要翻译： 具有柱状构造的钢材通过在破碎处理和粗（预处理）处理之后进行精加工而进行成形，以获得添加金属块部分与具有圆形十字形的轴部分的上部和下部组合的构造 部分。 在以下的修整加工中，轴部形成为具有从轴部的左右侧切除消除金属块部的结构。 在以下施胶处理中，允许从添加金属块部分到消除金属块部分发生塑性流动，以获得具有圆形横截面的轴部分。 当通过如上所述的加工步骤形成轴部时，可以获得曲柄轴的形成方法和曲轴的制造方法，能够减少加工步骤的数量，从而减少加工成本 处理时间缩短。