Noddle Posted March 29, 2009 Share Posted March 29, 2009 slightly off topic, but is TIG welding like Oxy / acetylene wire welding ? Nigel Quote Link to comment Share on other sites More sharing options...
kiwi303 Posted March 29, 2009 Share Posted March 29, 2009 sort of... TIG uses an electric arc from a handpiece to melt the pieces being worked on where the arc touches down instead of using a flame. If you're used to oxy/acet I hear TIG is simple to learn as many of the skills are similar, manuvering the fill rod for one, but where on Oxy/acet heat is controlled by moving the flame distance from the work to the light blue flame tip either into or out of the flame, TIG uses a foot or thumb control to increase or decrease cueent while arc distance remains constant. Quote Link to comment Share on other sites More sharing options...
Bart Hoedemaker Posted March 29, 2009 Share Posted March 29, 2009 Use a good Speedglas with not to dark lens, so you can see what you are doing. For the rest: Fall and stand up, everybody have to learn. Quote Link to comment Share on other sites More sharing options...
AkumaNoZeta Posted September 1, 2009 Author Share Posted September 1, 2009 I just thought I'd add a little update to this. I've done TIGing for like 3 weeks straight and now it's easier for me than MIG welding is, I just have so much more control of the TIG that I feel so much more comfortable with it now. Not to mention I love how you can hammer-weld the TIG beads when doing body work. The Henrob 2000 for oxy-acetylene torch is nice too, I think just because of it's versatility and price I would buy a Henrob as my first welding device whenever I have to start getting my own equipment. Just so everybody know, the Henrob is a lot easier than a Victor torch. Quote Link to comment Share on other sites More sharing options...
at-jefft Posted September 1, 2009 Share Posted September 1, 2009 MIG should be used for bodywork, the heat generated by TIG is much greater and will warp the metal. Quote Link to comment Share on other sites More sharing options...
AkumaNoZeta Posted September 1, 2009 Author Share Posted September 1, 2009 The warpage is caused by the shrinking of the weld bead, by hammer-welding it you are stretching out the bead again bringing the metal back to where it was. You can't hammer on a MIG weld so if you warp that it won't be as easy to bring back. Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted September 2, 2009 Share Posted September 2, 2009 Hmm, I guess maybe for that specific operation if you had it set up well enough you might be alright, but I would not recommend it. TIG may be very controllable and clean, but it dumps heat in like no tommorow. Quote Link to comment Share on other sites More sharing options...
Bart Hoedemaker Posted September 3, 2009 Share Posted September 3, 2009 Yeah, that's right. Best to use is MIG. ( co2 for the oldies ) Quote Link to comment Share on other sites More sharing options...
Xnke Posted September 4, 2009 Share Posted September 4, 2009 Who says you can't hammer a mig weld? There is no reason at all not to. If the weld is a full penetration, clean weld, then there is absolutely no reason to treat it any different than a weld made by any other process. Quote Link to comment Share on other sites More sharing options...
AkumaNoZeta Posted September 4, 2009 Author Share Posted September 4, 2009 The MIG weld is too hard to hammer on, the TIG can be hammered on because it cools slower and therefore is a lot softer. Also since the MIG is hard, it's also brittle, making it very likely to crack. Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted September 4, 2009 Share Posted September 4, 2009 The MIG weld is too hard to hammer on, the TIG can be hammered on because it cools slower and therefore is a lot softer. Also since the MIG is hard, it's also brittle, making it very likely to crack. Um.. I dunno about that statement.. a molten pool is a molten pool... I dont believe a MIG vs. TIG will "cool" faster or slower. I can understand that a MIG introduces a lot of heat in a larger area, while the TIG introduces the same heat in a smaller area.. but a larger surface dissipating the heat will cool faster then a smaller area. I think its the filler metal you use on the weld that determines how soft or hard the bead is. *from my understanding* Quote Link to comment Share on other sites More sharing options...
Bart Hoedemaker Posted September 6, 2009 Share Posted September 6, 2009 Um.. I dunno about that statement.. a molten pool is a molten pool... I dont believe a MIG vs. TIG will "cool" faster or slower. I can understand that a MIG introduces a lot of heat in a larger area, while the TIG introduces the same heat in a smaller area.. but a larger surface dissipating the heat will cool faster then a smaller area. I think its the filler metal you use on the weld that determines how soft or hard the bead is. *from my understanding* I think you meaned just the other way around.... Change MIG/TIG in your story... Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted September 7, 2009 Share Posted September 7, 2009 TIG punches heat into the material slower, generally. TIG is slower in general. With that, you have a larger amount of total heat in the TIG'ed part than MIG. The surface area is actually about the same; the entire part. Soon as you start putting heat into the surface, it starts transmitting it out to the whole part as well as radiating it off the part. With MIG, you are "in and out" much faster, so the rest of the part is generally not heated up much by the time you are done. Your weld area cools faster. That is why you can't TIG sheetmetal for a body. Too much heat, too much expansion, too much warp. Quote Link to comment Share on other sites More sharing options...
AkumaNoZeta Posted September 7, 2009 Author Share Posted September 7, 2009 http://www.sanjosechevys.org/Tech/tech_Sheet_Metal_welding.htm Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.