WELDING METHOD AND WELDING DEVICE

• Main Authors: SAKAI TOSHIAKI, KAYAHARA TAKASHI, YASUOKA TOMOMICHI, SHIGEMATSU TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 22.06.2023
• 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

To provide a new welding method and a welding device which, for example, can obtain required welding strength while suppressing spatters.SOLUTION: A welding method irradiates, for example, a processing object containing metal with a laser beam, melts the processing object in the irradiated part, and performs welding. The laser beam is composed of a main power region and at least one sub-power region, power of the main power region is equal to or more than power of the sub power region, a power ratio of the power of the main power region to a total of the power of the main power region and the power of the sub power region is within a range of 144:1 to 1:1. An aspect ratio of a depth of a weld mark to a width perpendicular to a sweeping direction of the weld mark formed in the processing object by relative movement of the laser beam to the processing object may be 0.8 or more.SELECTED DRAWING: Figure 5 【課題】例えば、スパッタを抑制しながら、所要の溶接強度を得ることが可能となるような、新規な溶接方法および溶接装置を提供する。【解決手段】溶接方法にあっては、例えば、金属を含む加工対象に向かってレーザ光を照射し、照射された部分の加工対象を溶融して溶接を行う。レーザ光は、主パワー領域と、少なくとも一つの副パワー領域とによって構成され、主パワー領域のパワーは、それぞれの副パワー領域のパワー以上であり、主パワー領域のパワーと、少なくとも一つの副パワー領域のパワーの合計とのパワー比が、１４４：１から１：１までの範囲内にある。レーザ光と加工対象との相対的な移動により当該加工対象に形成される溶接痕の掃引方向に対して直交する幅に対する溶接痕の深さのアスペクト比は、０．８以上であってもよい。【選択図】図５