发明授权
- 专利标题： Evaluation method and evaluation apparatus for spot welded portion
- 专利标题（中）： 点焊部的评价方法及评价装置
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申请号： US10849140申请日： 2004-05-20
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公开(公告)号： US07543732B2公开(公告)日： 2009-06-09
- 发明人: Eiichi Kobayashi , Yusuke Kondo , Hisayuki Ishizu , Nobutaka Oda , Kazuo Ao
- 申请人： Eiichi Kobayashi , Yusuke Kondo , Hisayuki Ishizu , Nobutaka Oda , Kazuo Ao
- 申请人地址： JP Tokyo
- 专利权人： Mitsubishi Jidosha Kogyo Kabushiki Kaisha
- 当前专利权人： Mitsubishi Jidosha Kogyo Kabushiki Kaisha
- 当前专利权人地址： JP Tokyo
- 代理机构： Birch, Stewart, Kolasch & Birch, LLP
- 优先权： JP2003-146373 20030523; JP2003-146374 20030523
- 主分类号： B23K31/12
- IPC分类号： B23K31/12
摘要：
A technique for evaluation of the strength of a spot welded portion of a panel is provided. A stress value at the welded portion of the panel is calculated by a stress analysis according to a FEM using the elements, and then the strength of the welded portion is evaluated based on the stress value at the welded portion. A portion in the proximity of the spot welded portion is divided, with a central portion of the spot welded portion registered with a nodal point of the elements, into a central element and plural concentric ring-like elements from the center side provided by the central portion of the spot welded portion. Thereafter, the plural concentric ring-like elements are individually divided in a circumferential direction each into a plurality of portions to form the elements. Then, the strength is evaluated based on the stress value of the second ring-like element.