| 摘要 |
A gas-flooding device for attachment to a welding tool tip used in heli-arc welding which includes a nonconsumable electrode projecting from a gas nozzle. The attachment device consists of a housing defining an enclosure having one open wall, a leading side wall and a trailing side wall. The attachment device is secured in tandem relation with the welding tool tip by clamp means extending forwardly of the leading wall of the housing. The housing has gas inlet means remote from its open wall and is substantially filled with a metallic mesh material, such as steel wool to diffuse and retard the flow of gas, such as argon or helium. The open wall of the housing confronts the work and includes a screen member for retaining the steel wool. The leading and trailing side walls of the housing are each provided with an open recess dimensioned to direct gas rearwardly and forwardly from the enclosure over the work. The housing includes means defining bearing surfaces disposed to engage the work on opposite sides of the weld bead whereby the welding tool tip is supported in desired spatial relationship to the work.
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