Text 21546, 81 rader
Skriven 2006-01-09 17:48:00 av Michiel van der Vlist (2:280/5555)
  Kommentar till text 21215 av Roy Witt (1:1/22)
Ärende: WTC fire         (was; La
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 MvdV>> Language issue here. I thought hat by "wire welding" you meant
 MvdV>> welding with a torch.

 > OK, I'll give you that one. We call that type of welding, with
 > a torch, using filler rod (here they're about 3ft long).

here they are 1 metre long. Thickness 3 or 4 mm. The ones used for brazing are
excellent for making an HB9CV fox hunting antenne. I made many of them. I also
used the steel filler rod to make antennas but they are no good for permanent
use at they will rust. We once made a dozen for the local scout group here to
have fox hunt during a JOTA.

So much for history. I have been lending my callsign to the local scout group
for the JOTA for some twenty years now. This year, well last year actually,
just befoe I was going to call them to remind them of the need to register,
they called me to tell me that this time they would dispense with the JOTA part
and do participate in the JOTI only. <sigh>

 > Wire welding is with the MIG machine and the wire is on a spool
 > that is regulated by the MIG machine.

Yes, I know about the MIG welders with a wire spool. Never used it myself
though.

I have a simple transformer for arc welding. 140 Amps maximum. I actually
bought it for my son to practise, but he soon lost interest so I kept it for
myself.

I have some pictures of it that I still should put on my webiste on the
"mistlamp op de kar" sub page. maybe I will find the time one of these days...

 MvdV>> I never claimed to be an experienced welder. In fact I am a lousy
 MvdV>> welder.You may remember me and Jack Yates discussing welding and me
 MvdV>> admitting to it. I am good at soldering though..

 > I never wanted to be a welder, because you can lose your
 > eyesight very easily. I've had 'sand' in my eyes more often
 > than I care to. That's what it feels like if you've been
 > overexposed to the bright light of an arc welder.

I never had that myself. But I have worked in an eye hospital and so I have
seen the results of exposure to UV. Because it is not so much the brightness of
the light as the UV that causes "welder's eyes". Doesn't happen if you are
careful but if you are sloppy with the hood....

 >>> (that's why you use a flux, heat the material and melt the rod).

 MvdV>> The flux is to clean the surface and screen the material from the
 MvdV>> atmosphere so that it does not oxidize.

 > Correct. That's what the gas used in MIG and TIG welding does.

And the slug around the electrode for arc welding...

 > There is a flux wire for the MIG, which means you pay more for
 > the wire, but you don't have to spend the money on gas.

Then it isn't MIG anymore..

 >>> Otherwise, there would be no weld. And you're right about too
 >>> deep penetration; that would occur if your weld burns holes
 >>> through joint.

 MvdV>> Which is why I am a lousy welder. I don't know how to properly
 MvdV>> regulate it. Especially with thin stuf, I often burn through it.

 > That was my dad. He used to weld exhaust systems, using a
 > torch and clothes hanger wire, which could be made of anything.
 > He burned a lot of holes, but with persistance, he got the job
 > done. But, once you learn to use the proper wire, it's not that
 > hard to weld thin stuff. Knowing the tempurature colors involved
 > in welding helps a lot.

I have no experience with a torch for welding, just for brazing.

With the electric arc welder, you don't see colours...

Cheers, Michiel

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