-
公开(公告)号：US11235422B2
公开(公告)日：2022-02-01
申请号：US16484010
申请日：2017-02-09
发明人： Yu Pan , David Yang , Wu Tao , Paolo Novelletto
IPC分类号： B23K26/22 , B23K26/082 , B23K26/244 , B23K26/08 , B23K103/08 , B23K103/10 , B23K103/04
摘要： A method for joining together metal workpiece (12,14 or 12,150, 14) includes forming a laser weld joint (66) in a workpiece stack-up (10) that fusion welds two or more overlapping metal workpiece (12,14 or 12,150 or 14) together. The laser weld joint (66) has an initial top surface (76). Once the laser weld joint (66) is formed, the method calls for impinging the laser weld joint (66) with a laser beam (24) and moving the laser beam (24) along the initial joint (66) including the initial top surface (76). The laser beam (24) is eventually removed from the laser weld joint (66) to allow the melted upper portion (78) of the joint (66) to resolidify and provide the laser weld joint (66) with a modified top surface (84) that is smoother than the initial top surface (76). By providing the laser weld joint with a smoother modified top surface, residual stress concentration points are removed and the laser weld joint is less liable to damage seal strips.
-
公开(公告)号：US20180043472A1
公开(公告)日：2018-02-15
申请号：US15659092
申请日：2017-07-25
发明人： David Yang , Wu Tao , Paolo A. Novelletto , Yu Pan , Justin Wolsker
IPC分类号： B23K26/244 , B23K26/08
摘要： A method of laser welding a workpiece stack-up that includes two or more overlapping metal workpieces is disclosed. The disclosed method includes directing a laser beam at a top surface of the workpiece stack-up to create a molten metal weld pool and, optionally, a keyhole, and further gyrating the laser beam to move a focal point of the laser beam along a helical path having a central helix axis oriented transverse to the top and bottom surfaces of the workpiece stack-up. The gyration of the laser beam may even be practiced to move the focal point of the laser beam along a plurality of helical paths so as to alternately convey the focal point back-and-forth in a first overall axial direction and a second overall axial direction while advancing the laser beam relative to the top surface of the workpiece stack-up along a beam travel pattern.
-
公开(公告)号：US10953497B2
公开(公告)日：2021-03-23
申请号：US16085283
申请日：2016-11-23
发明人： Hui-Ping Wang , Yu Pan , Blair E. Carlson , Joshua L. Solomon , William P. Payne , David Yang , Wu Tao
IPC分类号： B23K26/60 , B23K26/26 , B23K26/322 , B23K26/082 , B23K26/244 , B23K101/00 , B23K101/18 , B23K101/34 , B23K103/04
摘要： A method of laser welding a workpiece stack-up (10) of overlapping steel workpieces (12, 14) involves heat-treating a region (64) of the stack-up (10) followed by forming a laser weld joint (66) that is located at least partially within the heat-treated region (64). During heat-treating, one or more pre-welding laser beams (68) are sequentially directed at a top surface (20) of the workpiece stack-up (10) and advanced along a pre-welding beam travel pattern (70) so as to reduce an amount of vaporizable zinc within the stack-up (10). Thereafter, the laser weld joint (66) is formed by directing a welding laser beam (82) at the top surface (20) of the workpiece stack-up (10) and advancing the welding laser beam (82) along a welding beam travel pattern (84) that at least partially overlaps with a coverage area of a pre-welding beam travel pattern (70) or a shared coverage area portion of multiple pre-welding beam travel patterns (70). The method can help reduce an amount of vaporizable zinc within the stack-up (10).
-
公开(公告)号：US20200094350A1
公开(公告)日：2020-03-26
申请号：US16484010
申请日：2017-02-09
发明人： Yu Pan , David Yang , Wu Tao , Paolo Novelletto
IPC分类号： B23K26/22 , B23K26/08 , B23K26/082 , B23K26/244
摘要： A method for joining together metal workpiece (12,14 or 12,150,14) includes forming a laser weld joint (66) in a workpiece stack-up (10) that fusion welds two or more overlapping metal workpiece (12,14 or 12,150 or 14) together. The laser weld joint (66) has an initial top surface (76). Once the laser weld joint (66) is formed, the method calls for impinging the laser weld joint (66) with a laser beam (24) and moving the laser beam (24) along the initial joint (66) including the initial top surface (76). The laser beam (24) is eventually removed from the laser weld joint (66) to allow the melted upper portion (78) of the joint (66) to resolidify and provide the laser weld joint (66) with a modified top surface (84) that is smoother than the initial top surface (76). By providing the laser weld joint with a smoother modified top surface, residual stress concentration points are removed and the laser weld joint is less liable to damage seal strips.
-
公开(公告)号：US20190118307A1
公开(公告)日：2019-04-25
申请号：US16085283
申请日：2016-11-23
发明人： Hui-Ping Wang , Yu Pan , Blair E. Carlson , Joshua L. Solomon , William P. Payne , David Yang , Wu Tao
IPC分类号： B23K26/60 , B23K26/082 , B23K26/322 , B23K26/244 , B23K26/26
摘要： A method of laser welding a workpiece stack-up (10) of overlapping steel workpieces (12, 14) involves heat-treating a region (64) of the stack-up (10) followed by forming a laser weld joint (66) that is located at least partially within the heat-treated region (64). During heat-treating, one or more pre-welding laser beams (68) are sequentially directed at a top surface (20) of the workpiece stack-up (10) and advanced along a pre-welding beam travel pattern (70) so as to reduce an amount of vaporizable zinc within the stack-up (10). Thereafter, the laser weld joint (66) is formed by directing a welding laser beam (82) at the top surface (20) of the workpiece stack-up (10) and advancing the welding laser beam (82) along a welding beam travel pattern (84) that at least partially overlaps with a coverage area of a pre-welding beam travel pattern (70) or a shared coverage area portion of multiple pre-welding beam travel patterns (70). The method can help reduce an amount of vaporizable zinc within the stack-up (10).
-
公开(公告)号：US10675713B2
公开(公告)日：2020-06-09
申请号：US15659092
申请日：2017-07-25
发明人： David Yang , Wu Tao , Paolo A. Novelletto , Yu Pan , Justin Wolsker
IPC分类号： B23K26/244 , B23K26/082 , B23K26/322 , B23K26/08 , B23K101/34 , B23K103/16
摘要： A method of laser welding a workpiece stack-up that includes two or more overlapping metal workpieces is disclosed. The disclosed method includes directing a laser beam at a top surface of the workpiece stack-up to create a molten metal weld pool and, optionally, a keyhole, and further gyrating the laser beam to move a focal point of the laser beam along a helical path having a central helix axis oriented transverse to the top and bottom surfaces of the workpiece stack-up. The gyration of the laser beam may even be practiced to move the focal point of the laser beam along a plurality of helical paths so as to alternately convey the focal point back-and-forth in a first overall axial direction and a second overall axial direction while advancing the laser beam relative to the top surface of the workpiece stack-up along a beam travel pattern.
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.018 秒)
