METHOD OF FORMING FRACTURE START PORTION OF CON ROD AND FORMING DEVICE
    1.
    发明申请
    METHOD OF FORMING FRACTURE START PORTION OF CON ROD AND FORMING DEVICE 审中-公开
    形成连接和形成装置的断裂起始部分的方法

    公开(公告)号:US20160074949A1

    公开(公告)日:2016-03-17

    申请号:US14784695

    申请日:2014-05-09

    IPC分类号: B23D31/00 B23P15/00

    摘要: A method of forming a fracture start portion of a con rod for forming fracture start portions of a con rod at opposing positions in an inner peripheral surface of a large end of the con rod made of metal, includes a first step of forming a groove portion at a position corresponding to the fracture start portion by using a first insert tip with a large tip end and a second step of forming the fracture start portion, which has become a V-shaped groove, by machining a bottom portion of the groove portion smaller by using a second insert tip having a tip end smaller than the first insert tip.

    摘要翻译: 一种形成用于在由金属制成的杆的大端的内周面的相对位置处形成杆的断裂起始部分的杆的断裂起始部分的方法包括:第一步骤,形成槽部分 通过使用具有大的前端的第一插入端头和形成V形槽的断裂起始部分的第二步骤,通过机械加工凹槽部分的较小的底部,在对应于断裂起始部分的位置处 通过使用具有小于第一插入尖端的尖端的第二插入尖端。