Posted by rustyJeep
on 1/23/2006, 4:05 pm, in reply to "Definitions"
198.68.191.246
non-technical, no-frills definitions...
MIG and TIG are both variations on arc welding (TERMINOLOGY: arc welding uses low-voltage, high current electrical energy to produce heat for the welding process). Both processes use an inert gas fed through the working end (TERMINOLOGY: torch for TIG, Gun for MIG)to shield the welding process from atmospheric gas. The main difference is that a MIG welder continuously feeds filler material in the form of a wire via the gun, in TIG the weldor (TERMINOLOGY: welder is a machine, weldor is the person operating the machine) holds the filler material in his hand and feeds it into the weld manually. MIG is the most commonly used process for manufacturing, because it takes less time and less skill to make a good weld. TIG takes about 10 times as long to perform, so is used in applications where weld quality is more important than production cost.
About high-pulse... I'm not familiar with that exact phrase. There are variations on MIG and TIG that use either the words HIGH or PULSE, but I don't think they're used together. They're phrases that the weldor or weld engineer use that are related to the frequency of current the welder produces or how a MIG machine sprays filler material into the weld.
As you can tell, these are actually complicated technologies. If you're not a weldor, an employer shouldn't expect you to know too much about it. A weldor is going to come on here and say I've oversimplified, but that's all you get on the nickel tour.
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