레이저 용접방법

• Main Author: YAMAGUCHI MORIHIKO
• Format: Patent
• Language: Korean
• Published: 09.05.2023
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

제1금속부재(11)와 제2금속부재(12)를 용접하는 레이저 용접방법에서는, 접합선(13)을 따라 제1레이저빔을 제1주사패턴(P1)으로 조사하여 제1용접부(21)를 형성하는 제1워블가공(ST1)을 실시한다. 다음에, 제1워블가공(ST1)에 의하여 형성된 제1용접부(21)의 표면을 따라 제2레이저빔을 제2주사패턴(P2)으로 조사하여 제1용접부(21)에 중첩하여 상기 제1용접부(21)보다 넓은 폭이며 얕은 깊이의 제2용접부(22)를 형성하는 제2워블가공(ST2)을 실시한다. 지연균열을 방지하거나 혹은 억제할 수 있는 용접부(20)가 형성된다. In a laser welding method for welding a first metal member (11) and a second metal member (12), a first wobbling process (ST1) is carried out in which a first laser beam is directed in a first scanning pattern (P1) along a butt-joining line (13) and a first welded part (21) is formed. A second wobbling process (ST2) is subsequently performed in which a second laser beam is directed in a second scanning pattern (P2) along the surface of the first welded part (21) formed through the first wobbling process (ST1) and a second welded part (22) that is wider and shallower than the first welded part (21) is formed overlapping the first welded part (21). A welded part (20) in which delayed cracking can be prevented or suppressed is thus formed.