BACKSIDE SURFACE WELDING SYSTEM AND METHOD

Laser welding of a first metal substrate having a first planar surface and a second planar surface disposed opposite the first planar surface to a second metal substrate is performed by placing an end face of the second metal substrate proximate to the first planar surface, An input laser beam from a fiber laser is generated, and a beam delivery system is provided that is configured to receive the input laser beam and generate an output laser beam having a beam spot that moves in a predetermined pattern along a first and a second axes to irradiate a target area on the second planar surface such that the target area is positioned over an intersection region of the first planar surface where the end face is positioned proximate to the first planar surface. 通过以下来执行将第一金属基板到第二金属基板的激光焊接，其中第一金属基板具有第一平坦表面和与该第一平坦表面相反设置的第二平坦表面，将第二金属基板的端面放置成靠近于第一平坦表面；从光纤激光器生成输入激光束；和提供束传输系统，该束传输系统被配置为接收输入激光束并且生成具有沿第一轴线和第二轴线以预定图案移动的束斑的输出激光束，以便照射第二平坦表面上的目标区域，使得目标区域定位于第一平坦表面的相交区域上方，其中端面被定位成靠近于第一平坦表面。