LASER BEAM WELDING METHOD

摘要

PURPOSE:To remarkably suppress the generation of surface strain of the circumference and a general part of a continuous weld zone. CONSTITUTION:In laser beam welding where a laser beam is irradiated intermittently along a welding planning line L on a hemming machining part 2 of an outer panel 1a and an inner panel 1b to form the continuous weld zone 3 intermittently notches 11 are preformed on a hemming flange 10 of the outer panel 1a, the continuous weld zone 3 is formed between the couple of notches 11, tensile stress generated around the continuous weld zone 3 is released by the notches 11 and the generation of the surface strain is suppressed.