초록 ▼

Disclosed is an improved welding system incorporating a novel torch mounted gas scavenging system which removes and filters contaminant gases from the workplace and incorporates an enclosure which creates high turnover rates of shielding gases at the weld pool thereby preventing contaminant gas indu

Disclosed is an improved welding system incorporating a novel torch mounted gas scavenging system which removes and filters contaminant gases from the workplace and incorporates an enclosure which creates high turnover rates of shielding gases at the weld pool thereby preventing contaminant gas induced defects, and which insulates the heat affected area thereby prolonging the cooling process of the weld pool, effectively reducing porosity and other related defects, and which provides the capability of accurately monitoring and displaying specific measurements of an ongoing welding operation such as humidity, ambient frequencies, internal temperature and pressure in the enclosure, and on line acoustic emissions sensors which indicate the presence or absence of defects as the weld is being made. The system also has an auxiliary gas source which is independently controlled from the primary shielding gas flow, which allows the introduction of auxiliary gas flows into the enclosure without disturbing the primary gas flow pattern.

대표청구항 ▼

[ I claim:] [1.] A torch mounted gas scavenging system for use with manual and robotic welding and cutting torches to remove contaminant gases from the weld or cutting site comprising:a hollow enclosure having an upper end adapted for connection to the lower portion of at least one welding or cuttin

[ I claim:] [1.] A torch mounted gas scavenging system for use with manual and robotic welding and cutting torches to remove contaminant gases from the weld or cutting site comprising:a hollow enclosure having an upper end adapted for connection to the lower portion of at least one welding or cutting torch, a main body portion extending downwardly from said upper end to surround said at least one torch lower portion, and a base portion at a lower end of said main body portion configured to be positioned closely adjacent the metal surfaces surrounding the weld or cutting site;said enclosure main body portion being extensible and contractable such that said base portion is movable relative to said upper end and to said lower portion of said at least one torch;viewing means on said enclosure main body portion for observing the welding or cutting operation taking place inside said enclosure; anda gas conduit having one end in fluid communication with the interior of said enclosure and another end adapted for connection with a source of gas under pressure for conducting gas under pressure into said enclosure to provide a gas envelope around the weld or cutting site which is expelled from the enclosure to remove vapor and moisture from the affected zone in the substrate around the weld or cut and evacuate contaminant gases from the proximity of the weld.