| 摘要 |
A gas lens assembly for use in a gas shielded welding torch to provide lamin ar gas flow to the weld puddle. The assembly includes a plurality of annular fi ne mesh inner filter screens mounted in fixed axially spaced disposition in a g as chamber formed between the lens body and lens sleeve. The filter screens are preferably spaced apart a predetermined distance by a plurality of wave-shap ed open mesh spacer discs disposed in a sandwich configuration between the filt er 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 scree n 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 li fe of the assembly.
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