WELDING METHOD AND WELDING APPARATUS

• Main Authors: MATSUNAGA KEIGO, KAYAHARA TAKASHI, TAKADA KAZUTERU, YASUOKA TOMOMICHI, SHIGEMATSU TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 19.03.2024
• 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 new welding apparatus that can make areas of a weld part smaller while suppressing sputter for instance, which can make a diameter of a beam smaller in other words.SOLUTION: In the welding method, a portion irradiated with a laser beam in a work-piece is melted to perform welding by irradiating a surface of the work-piece with the laser beam that moves in a sweeping direction relatively with respect to the work-piece. The lase beam includes a plurality of beams, and the plurality of beams include at least one main beam and at least one sub beam that is smaller in power than the main beam. On the surface are formed a main power region including the at least one main beam and a sub power region including the at least one sub beam, where a shortest distance between centers of the plurality of beams made adjacent to each other on the surface is 75[μm] or less.SELECTED DRAWING: Figure 3 【課題】例えば、スパッタを抑制しながら、溶接部の面積をより小さく、つまりビームの直径をより小さくすることが可能な、新規な溶接方法および溶接装置を得る。【解決手段】加工対象に対して相対的に掃引方向に移動するレーザ光を加工対象の表面に照射することにより、加工対象のレーザ光が照射された部分を溶融して溶接を行う、溶接方法であって、レーザ光は、複数のビームを含み、複数のビームは、少なくとも一つの主ビームと、当該主ビームよりもパワーが小さい少なくとも一つの副ビームとを含み、表面上に、少なくとも一つの主ビームを含む主パワー領域と、少なくとも一つの副ビームを含む副パワー領域と、が形成され、表面上において隣接する複数のビームの中心間の最小距離が、７５［μｍ］以下である。【選択図】図３