公开(公告)号：US4916284A

公开(公告)日：1990-04-10

申请号：US348749

申请日：1989-05-08

Applicant: Frederick D. Petrick

Inventor： Frederick D. Petrick

IPC: B23K26/16 ,  B23K26/24 ,  B23K26/32 ,  B23K33/00

CPC classification number: B23K33/008 ,  B23K26/16 ,  B23K26/244 ,  B23K26/32 ,  B23K26/322 ,  B23K26/60 ,  B23K2201/006 ,  B23K2201/34 ,  B23K2203/04 ,  B23K2203/50 ,  B29C66/135 ,  B29C66/30223

Abstract: Methods of laser welding zinc coated galvalized steel are disclosed. In a method that relates to forming hem joints for motor vehicle body components a sheet of steel is provided with a plurality of V-shaped tabs. When a hem joint is formed the V-shaped tabs together with a surface of another sheet of steel form gas venting channels that provide an escape passage for gas vapors that are developed when the zinc coating is vaporized by laser welding. In another method of laser welding, one of the steel sheets has an axially extending wall that is V-shaped to provide a V-shaped groove and the wall has spaced gas vent holes.

Abstract translation: 披露了镀锌镀锌钢板的激光焊接方法。 在涉及形成机动车车身部件的下摆接头的方法中，钢板上设置有多个V形凸片。 当形成边缘接头时，V形接头与另一片钢板的表面一起形成气体排出通道，其为当通过激光焊接蒸发锌涂层时形成的气体蒸气提供排出通道。 在另一种激光焊接方法中，钢板之一具有V形的轴向延伸壁，以提供V形槽，并且壁具有间隔开的通气孔。