| 摘要 |
Apparatus for weld build-up on a surface of revolution consists of an elongated, rotatable assembly that supports, at one end, an electrical welding torch (10) terminating in a nozzle, the rotatable assembly introduction electrical welding current, inert gas, and welding wire to the torch, and including an electrically conductive, hollow, metal drive spindle. The drive spindle (200) applies driving motion and conducts electrical current for transmission to the torch, and the gas and welding wire pass through the spindle to the torch. Also, an electrically conductive carrier (110) is mounted in a radially adjustable, electrically continuous, offset relationship to a conductive body (140) joined to the end of a spindle, and a torch held is in electrically conductive relationship by the carrier, the electrically conductive body and carrier together defining a gas tight passage (FIG. 6A) extending from the spindle to the torch, a connection cavity being defined at a motion interface between the carrier and the body to maintain gas flow continuity therebetween over their range of offset adjustment. A method for weld build up on a surface of revolution, and a system of orbital torch components (FIGS. 7A-7H) are also described.
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