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Re: Arc welding question #39254 07/30/02 04:22 PM
Joined: Jun 2000
Posts: 1,002
carter Offline
Body Damage is Cool
</font><blockquote><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><hr /><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Originally posted by 4Crawler:
<strong>[QUOTE]Also try the different polarity and/or AC settings to change the heat going into the metal (if your welder supports this). Reversing the polarity (make the electrode negative) will greatly reduce the heat into the metal, and running AC is about 1/2 way between the two. This is the main advantage of having an AC/DC welder, gives you added flexibility.</strong></font><hr /></blockquote><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Roger, is this true for MIG welding as well?


Mike Carter
85 & 86 4Runners

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Re: Arc welding question #39255 07/30/02 04:36 PM
Joined: Jan 2000
Posts: 12,153
4Crawler Offline
Web Wheeler
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</font><blockquote><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><hr /><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Originally posted by thecarterman:
<strong> </font><blockquote><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><hr /><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Originally posted by 4Crawler:
<strong>[QUOTE]Also try the different polarity and/or AC settings to change the heat going into the metal (if your welder supports this). Reversing the polarity (make the electrode negative) will greatly reduce the heat into the metal, and running AC is about 1/2 way between the two. This is the main advantage of having an AC/DC welder, gives you added flexibility.</strong></font><hr /></blockquote><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Roger, is this true for MIG welding as well?</strong></font><hr /></blockquote><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Unfortunately no, MIG (gas or flux core) have to be run the proper polarity, hard wire is electrode-positive and flux core is usually electrode negative.

Re: Arc welding question #39256 07/31/02 02:56 PM
Joined: Apr 2000
Posts: 3,748
Dandeman Offline
Toyota Moderator
Here's a neat chart I found on the Army training material welding site http://www.adtdl.army.mil/cgi-bin/atdl.dll/tc/9-237/toc.htm
about welding polarity... Lots of other good welding info also...

<img src="http://personal.atl.bellsouth.net/rdu/e/_/e_dan/weld_polarity.jpg" alt="" />

Also have a link to this site on the "Welding" page link in the signature below..

Re: Arc welding question #39257 07/31/02 03:05 PM
Joined: Dec 2000
Posts: 154
Kendall Offline OP
Wheeler
That looks like a good site. I bookmarked it for future reading.

I welded it up last night. I tack welded the inner seam on top and bottom, then made sort welds across the gap letting it cool inbetween welds. This worked great. It also cause less heat distortion of the intended bend.

Thanks for your help.


88 Xtra Cab, SAS, 35X12.50 MTR, Toyota E-Lockers front and rear, Rear seat, custom nerfs and rear bumper.
Re: Arc welding question #39258 07/31/02 04:38 PM
Joined: Jun 2001
Posts: 934
gota87toy Offline
Rock Warrior
hey Kendall-

I make most of my cuts in square tubing w/ a standard circular saw w/ a metal cutting blade. Just set the depth so that it doesn't cut thru, set the desired angle on the miter guage or lay them out w/ a carpenters square and have at it. Ya just have to plan which side to cut to for a good clean, straight, easy to weld bend. The kerf on the blades I use is 1/8", so ya have to offset both cuts that much. Two cuts at 22-1/2 degrees make a real clean 45 degree bend.

later


"Nine-11 changed me," he said. "I'm shocked that it didn't change the whole country, frankly."

Dennis Miller
Re: Arc welding question #39259 07/31/02 07:49 PM
Joined: Dec 2000
Posts: 154
Kendall Offline OP
Wheeler
That is what I did, except with a chop saw. The problem was I only needed a little bend around 6 degrees. I ended up with a little too much material removed and had a gap at the proper angle. It did come out good, nice and clean look that way.


88 Xtra Cab, SAS, 35X12.50 MTR, Toyota E-Lockers front and rear, Rear seat, custom nerfs and rear bumper.
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