SEAM WELD SYSTEM, SEAM WELD METHOD, AND PRODUCTION METHOD OF WORKPIECE

• Main Authors: SONODA TEPPEI, NAKAKURA MASAMI
• Format: Patent
• Language: English; Japanese
• Published: 19.11.2015
• 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

PROBLEM TO BE SOLVED: To perform seam weld with high quality and easily.SOLUTION: A seam weld system according to one embodiment comprises: roller electrodes; an electrode movement mechanism (robot arm); a plurality of drive sources (servo motors); and a control part. A pair of the roller electrodes are provided for performing seam weld to a workpiece by sandwiching the workpiece at peripheral edge parts of them in a state that the roller electrodes rotate and are energized. To the electrode movement mechanism, the roller electrodes are attached, and the electrode movement mechanism moves the roller electrodes along a weld line of the workpiece. The drive sources rotate a joint of the electrode movement mechanism and the roller electrodes, respectively. The control part controls a rotation amount of the roller electrode, based on torque change of the drive sources, so that torque acting to the roller electrodes becomes in a preset range. 【課題】品質高くかつ容易にシーム溶接を施すこと。【解決手段】実施形態の一態様に係るシーム溶接システムは、ローラ電極と、電極移動機構（ロボットアーム）と、複数の駆動源（サーボモータ）と、制御部とを備える。上記ローラ電極は、一対設けられ、互いの周縁部で被溶接物を挟み付けつつ回転しながら通電されることによって上記被溶接物をシーム溶接する。上記電極移動機構は、上記ローラ電極が取り付けられ、かかるローラ電極を上記被溶接物の溶接線に沿って移動させる。上記駆動源は、上記電極移動機構の関節および上記ローラ電極それぞれを回転させる。上記制御部は、上記ローラ電極に作用するトルクが予め設定された範囲内となるように上記駆動源のトルク変化に基づいて上記ローラ電極の回転量を制御する。【選択図】図３Ａ