| 摘要 |
A gas lens assembly for use in a gas shielded welding torch to provide laminar gas flow to the weld puddle. The assembly includes a plurality of annular fine mesh inner filter screens mounted in fixed axially spaced disposition in a gas chamber formed between the lens body and lens sleeve. The filter screens are preferably spaced apart a predetermined distance by a plurality of wave-shaped open mesh spacer discs disposed in a sandwich configuration between the filter screens. A stack of adjacently disposed outer filter screens are mounted in the gas chamber outwardly of the fine mesh filter screens. Each of the outer screens in the stack is individually removable such that the outermost screen can be readily peeled from the stack when damaged by spatter or heat to maintain the laminar gas flow through the assembly and prolong the useful life of the assembly.
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