发明授权
- 专利标题: Oil ring, manufacturing method thereof, and piston structure using the oil ring
- 专利标题(中): 油环,其制造方法和使用油环的活塞结构
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申请号: US11257377申请日: 2005-10-24
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公开(公告)号: US07797829B2公开(公告)日: 2010-09-21
- 发明人: Masaki Yamada , Kuniyasu Ito , Masami Kawasaki , Tomoaki Abe , Shigenobu Uchiyama
- 申请人: Masaki Yamada , Kuniyasu Ito , Masami Kawasaki , Tomoaki Abe , Shigenobu Uchiyama
- 申请人地址: JP Tokyo
- 专利权人: Kabushiki Kaisha Riken
- 当前专利权人: Kabushiki Kaisha Riken
- 当前专利权人地址: JP Tokyo
- 代理机构: Slater & Matsil, L.L.P.
- 优先权: JP2003-120169 20030424
- 主分类号: B23P15/06
- IPC分类号: B23P15/06
摘要:
A method of manufacturing an oil ring is disclosed. The oil ring includes an annular oil ring body having a pair of rail portions at its axially upper and lower portions and butt ends, and a coil expander assembled in the inner periphery of the oil ring body. A number of oil ring bodies and annular spacers having a smaller diameter than the oil ring bodies are stacked, and then aligned and retained using a jig such that an outer periphery of the oil ring bodies becomes a circle. The aligned oil ring bodies are rotated and a flat region that is substantially level with respect to the outer peripheral sliding surface of the plurality of oil ring bodies is formed. Curved regions extending on both sides of that flat region are formed using a buff or an elastic grindstone.
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