| 摘要 |
A rotary welding attachment member comprising a cam member having a cam surface and a rotatable base movable relative to the cam member. The rotatable base supporting a support rod and the support rod supporting a rider block which is movable along the support rod. A movable torch head, supporting a welding tip, being supported by the rider block. The torch head being coupled to the rotatable base via a flexible coupling to facilitate conveyance of a welding wire and a welding gas to the torch tip while the rotatable base, the support rod, the rider block and the torch head facilitating a supply of electrical current to the torch tip. An indexing mechanism, at least partially support by the rotatable base and cooperating with the cam surface, moves the rider block radially inwardly or outwardly along the support rod as the rotatable base rotates.
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