| 摘要 |
An electrode holder which conducts welding current from a platen via a base, a hollow body, and a spindle in the body. The spindle has an electrode tip socket in its outer end. This eliminates shunt cables. The spindle is axially moveable and has a head inside the body abutting a flange on the body. A split-ring jam-collar abuts the head and a spring forces the jam-collar into current-carrying contact with both the head and the body. The collar and head have camming surfaces to move the ring radially against the body. By using a spring to suit the work, preloading the spring, and calculating added load to move the spindle axially, the force of contact at the workpiece can be controlled to make good welding contact and to not damage the tip or work. The length of inward travel of the spindle in conjunction with the strength of the spring and preload gives an accurate measure of applied load. Two or more such holders on a platen may be used with the springs compensating differences in spacing and in workpieces.
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