Mig brazing

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Can anyone tell me about mig brazing. What equipment is needed, how easy is it to learn, and how well it hold up. I would like to know if this would be good to weld up a bicycle frame. THanks for any help!
Reply:I know about oxy/ acetaline brazing, with Bronze, nickel rod, and silver solder. I don't know about mig brazing, I have never heard of it. There was a great thread in the how-to section on brazing, with excellent links. I learned it by just trying it for fun; I fixed some busted gears when I learned it to save a few bucks in shop class in HS.And then, after so much work...... you have it in your hand, and you look over to your side...... and the runner has run off. Leaving you holding the prize, wondering when the runner will return.
Reply:Good question, I'm thinking it would not be the ideal process for a bike frame.  Better to use slip fittings and silver braze by oxyfuel torch.I remember seeing OTC Daihen equipement at the AWS show that was setup specifically for the MIG Brazing process, but that was probably 10 years ago.  I believe MIG brazing was developed for automotive sheet metal applications, and uses a silicon bronze (Everdur) or similar alloy.  It appears to be mostly popular in Europe.Did not find much in a web search, but here is one article on pulsed GMA brazing.  http://www.aws.org/w/s/wj/2001/10/0011/index.htmlAlso an article on BMW's troubles with MIG brazing and replacement of the process with Lincoln's Surface Tension Transfer (STT) process.http://content.lincolnelectric.com/p...ture/nx450.pdfAnd some info from Fronius.http://www.fronius.com/cps/rde/xbcr/..._loeten_gb.pdfhttp://www.fronius.com/cps/rde/xbcr/...blechen_gb.pdf