| 摘要 |
The automatic welding machine improves the reliability of the welds of keys tone plate to the railroad car lower frame by equipping the welder head coupled with a welding torch. The welding machine comprises; (A) a flatcar frame (3) to move back and forth in the length direction of keystone plate; (B) two welder heads (5,5a) supported by supportor (4); (C) a servomotor (14) to drive rollers on the rail (10) supported by I type beam (11); (D) a jig (7) to support the lower frame (6) of the workpiece (2).
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