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1. 发明申请

WO2017035728A1 METHOD FOR LASER WELDING STEEL WORKPIECES 审中-公开
标题翻译：激光焊接工具的方法
公开(公告)号：WO2017035728A1
公开(公告)日：2017-03-09
申请号：PCT/CN2015/088563
申请日：2015-08-31
申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC , YANG, David S.
发明人： YANG, David S. , TAO, Wu , ZHANG, Jing , WOLSKER, Justin Allen
IPC分类号： B23K26/322 , B23K26/21
CPC分类号： B23K26/244 , B23K26/082 , B23K26/322 , B23K2201/006 , B23K2201/18 , B23K2201/34 , B23K2203/04
摘要： A method of laser welding a workpiece stack-up (10) that includes at least two overlapping steel workpieces (12, 14), at least one of which is a zinc-coated steel workpiece, is disclosed. The disclosed method includes advancing the laser beam (56) relative to the top surface (26) of the workpiece stack-up (10) in a way that imposes bidirectional movement of the laser beam (56). In particular, as it is being advanced relative to the top surface (26) of the workpiece stack-up (10), the laser beam (56) moves in a forward direction (80) while also moving back and forth in a lateral direction (82) oriented transverse to the forward direction. Such bidirectional movement is believed to minimize zinc vapor entrapment within the molten steel weld pool (74), thus leading to a laser weld joint (68) that contains less weld defects derivable from zinc vapors that may be generated by the heat of the laser beam (56).
摘要翻译：公开了一种激光焊接包括至少两个重叠钢工件（12,14）的工件叠层（10）的方法，其中至少一个是镀锌钢工件。所公开的方法包括以施加激光束（56）的双向移动的方式使激光束（56）相对于工件叠层（10）的顶表面（26）前进。特别地，当相对于工件叠层（10）的顶面（26）进行相对移动时，激光束（56）向前移动（80），同时沿横向方向前后移动（82）横向于向前方向定向。认为这种双向运动可最大限度地减少钢水熔池（74）内的锌蒸气截留，从而导致激光焊接接头（68），其包含较少的可由激光束热产生的锌蒸汽的焊接缺陷（56）。

2. 发明申请

WO2016192039A1 LASER WELDING OVERLAPPING METAL WORKPIECES 审中-公开
标题翻译：激光焊接重金属工件
公开(公告)号：WO2016192039A1
公开(公告)日：2016-12-08
申请号：PCT/CN2015/080578
申请日：2015-06-02
申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC , YANG, David S.
发明人： YANG, David S. , WOLSKER, Justin Allen , ZHANG, Jing , TAO, Wu , GAO, Dalong
IPC分类号： B23K26/24
CPC分类号： B23K26/244 , B23K2201/34 , B23K2203/04 , B23K2203/08
摘要： A method of laser welding a workpiece stack-up (10) that includes at least two overlapping steel workpieces (12, 14) comprises directing a laser beam (40) at a top surface (26) of the workpiece stack-up to form a keyhole (56) surrounded by a molten steel weld pool (58). The laser beam is conveyed along a predefined weld pattern that includes one or more nonlinear inner weld paths (66) and an enclosed outer peripheral weld path (68) surrounding the one or more nonlinear inner weld paths. During conveyance of the laser beam along the one or more nonlinear inner weld paths, the keyhole fully penetrates through the workpiece stack-up from the top surface of the stack-up to the bottom surface (28) of the stack-up. The method produces weld joints between the steel workpieces that do not have an intentionally imposed gap formed between their faying surfaces.
摘要翻译：激光焊接包括至少两个重叠的钢工件（12,14）的工件叠层（10）的方法包括在工件叠层的顶表面（26）处引导激光束（40）以形成钥匙孔（56）由钢水熔池（58）包围。激光束沿着包括一个或多个非线性内部焊接路径（66）和围绕一个或多个非线性内部焊接路径的封闭外部周边焊接路径（68）的预定焊接图案传送。在沿着一个或多个非线性内部焊接路径传送激光束期间，钥匙孔从堆叠的顶部表面完全穿透工件叠层到堆叠的底部表面（28）。该方法在钢工件之间产生焊接接头，这些焊接接头在其接合表面之间不形成有意的间隙。

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