| 摘要 |
PURPOSE:To reduce an initial cost by fitting pivotally and freely oscillatably a welding gun to a gun bracket, disposing the pivotal fitting part thereof on the extension line of the surface to be welded of a work and executing spot welding. CONSTITUTION:The gun bracket 11 is erected and fixed to an arm 10 of a rectangular coordinate type robot and the opening and closing center of a pincher gun 12 is freely oscillatably and pivotally fitted to the top end thereof. A welding device operates the robot by the preliminarily taught operation control and disposes the pivotal shaft 13 of the gun 12 onto the extension line of the surface to be welded of the coupling flange 15 of the work 14; at the same time said device moves the gun 12 along the flange 15. The spot welding is successively executed by electrodes 12a by extending and contracting a pressurizing cylinder 16. Since the shaft 13 exists on the extension line of the surface to be welded of the work 14, the electrodes 12a grasp uniformly the flange 15 and satisfactory welding is executed. The initial cost is reduced by using the inexpensive rectangular coordinate type robot. |
