- 专利标题: Method for producing a forged crankshaft
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申请号: US15325101申请日: 2015-07-09
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公开(公告)号: US10350671B2公开(公告)日: 2019-07-16
- 发明人: Kenji Tamura , Junichi Okubo , Koichiro Ishihara , Ken Yoshino , Kunihiro Yabuno , Hiroyuki Kurokawa , Tomohisa Yamashita , Sho Takamoto
- 申请人: NIPPON STEEL & SUMITOMO METAL CORPORATION
- 申请人地址: JP Tokyo
- 专利权人: NIPPON STEEL & SUMITOMO METAL CORPORATION
- 当前专利权人: NIPPON STEEL & SUMITOMO METAL CORPORATION
- 当前专利权人地址: JP Tokyo
- 代理机构: Clark & Brody
- 优先权: JP2014-144338 20140714
- 国际申请: PCT/JP2015/003452 WO 20150709
- 国际公布: WO2016/009620 WO 20160121
- 主分类号: B21J5/02
- IPC分类号: B21J5/02 ; B21K1/08 ; F16C3/08
摘要:
A method for producing a forged crankshaft includes: a preforming step of forming a preformed blank with no flash, the preformed blank including a shape of the crankshaft, wherein the crank arm have excess projecting portions at an outer peripheries of side portions of the crank arm near the crank pin; a die forging step of forming a forged blank with flash by pressing the preformed blank with a pair of first dies; and a trimming step of removing the flash from the forged blank. In the die forging step, while a second die is abutted against a journal-side surface of the crank arm and holds the surface, the excess projecting portions of the crank arm are deformed by the first dies so as to increase the side portions of the crank arm in thickness.
公开/授权文献
- US20170189955A1 METHOD FOR PRODUCING A FORGED CRANKSHAFT 公开/授权日:2017-07-06