| 摘要 |
PURPOSE: A double lower holder welding gun is provided to weld different work piece of different thickness with one welding gun, thereby improving working efficiency. CONSTITUTION: A welding gun comprises a frame(11) connected to a robot, an arm(17) connected to the frame, a lower holder(10) positioned in lower part of work piece connected to the arm, a shank member connected to the lower holder and the frame. The shank member has a tip member to make spark in its end. The lower holder is connected to the arm rotating right and left around the central shaft of the arm. An auxiliary holder(20) is connected to the arm of lower part of the lower holder. The lower holder and the auxiliary holder are fixed by a spring ball plunger to the arm.
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