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Old 05-31-2021, 10:16 AM
TAKerry TAKerry is offline
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Might experiment with a propane torch, would not trust myself with the Oxy/Ac. As a welder for years ... shrinking hot metal was always the enemy. Spent a lot of time trying to prevent it, or compensate for it ... rarely USE it ... except flame bending long pieces edgewise. Heat with a welding torch in a series of triangle shapes with the base of the triangle on the side you want the inside radius to be ... but that was always metal at least 1/4" thick.
Sorry for the hijack, but there was an old timer welder pop would use. This guys first career was as a fabricator at Beth Steel in Bmore. He told me of a time they were shaping large I beams for bridge work. Said there were a gang of guys with rose bud torches heating the beam to bend it.

To get back to the original program, I had to repair some accident damage on the lower back quarter of a car, I did use a contour gauge comparing to the other side. But like Musclah said, as long as its close, youre only going to see one side at time.

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Old 05-31-2021, 11:02 AM
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A set of torches with the small brazing tip...is the ticket for shrinking metal. A small fine ..pointy flame. The propane flame is way too big ..IMHO.

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Old 05-31-2021, 06:20 PM
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I wouldn't use a propane torch, that will only cause more problems as it heats to large of an area and takes to long allowing the heat to disperse on the panel distorting it.

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Old 06-01-2021, 02:47 AM
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You just gave me a reason to buy and new set of torches. I've lost half the tips for mine and it's pretty much obsolete anyway, can't get parts for it.

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Old 06-01-2021, 05:59 AM
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Iíve used my stud welder with the shrink tip on those pesky high spots then check with a body file.

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Old 06-01-2021, 02:18 PM
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Curious how the shrink tip works, something like a copper tip that heats up a spot using electrical resistance like a spot welder?

I just ordered a Harris #1 torch tip which hopefully fits my 1980's Craftman torch.

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Old 06-01-2021, 02:48 PM
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Curious how the shrink tip works, something like a copper tip that heats up a spot using electrical resistance like a spot welder?

I just ordered a Harris #1 torch tip which hopefully fits my 1980's Craftman torch.
Yes.

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Old 06-01-2021, 02:55 PM
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you can even use a mig welder. heat it hammer it down preferably with dolly and then cool it down.

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Old 06-01-2021, 07:45 PM
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So pull the wire out of a MIG welder, use an old tip as the contact?

I assume I'd have to play with the settings on some scrap so I don't blow holes in things, including the welder.

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Old 06-02-2021, 09:41 AM
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just make believe you're welding a hole 1/2 " after you finish cooling down just grind it and cool with air as you grind

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Old 06-02-2021, 02:00 PM
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Oh, so you mean actually apply metal with the MIG, I thought it was just using the MIG transformer to provide current to heat a spot of metal.

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Old 06-02-2021, 03:31 PM
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The wire is the heat .

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Old 06-02-2021, 09:37 PM
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What a mess.....

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Old 06-03-2021, 12:21 AM
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I'll give the torch method a try first I think.

So far my experience for small imperfections has been ... less is better. Get it close and stop messing with it until a more experience hand can look at it.

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Old 06-03-2021, 10:04 AM
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I think the torch method works best,I just suggested the mig if you're in a pinch.Good luck with you're build.

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Old 06-04-2021, 09:33 AM
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I thought you meant using an old tip too. Like dataway, I am curious as to how the shrinking tips work and what they work with. Do they make something like that for a standard wirefeed MIG?

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Old 06-04-2021, 08:05 PM
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Click image for larger version

Name:	BD6ACC43-0B9B-4213-9F8D-0D45A7BAC912.jpg
Views:	253
Size:	31.0 KB
ID:	567749

This carbon stick set up is the balls. Just remove your tip....wind this rig in...shut the wire speed to off....up the heat a touch....ground said panel...touch the rod to the panel and pull the trigger....flame Less heat to a specific area.

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Old 06-04-2021, 08:16 PM
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Attachment 567749

This carbon stick set up is the balls. Just remove your tip....wind this rig in...shut the wire speed to off....up the heat a touch....ground said panel...touch the rod to the panel and pull the trigger....flame Less heat to a specific area.
I read somewhere that you cannot use those with an inverter style MIG. Have you tried it?

Don

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Old 06-04-2021, 08:37 PM
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I read somewhere that you cannot use those with an inverter style MIG. Have you tried it?

Don
My old Solar 165 mig ran it....Itís best to check with your manufacturer to be sure.

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Old 06-04-2021, 11:43 PM
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Excellent ... I'll get one of those, I have two transformer based Lincoln MIGs that should do the trick.

I'd guess it wouldn't work well with an inverter MIG, they use a computer to sense what's happening at the tip and adjust on the fly ... not sure it would play nice with something like this.

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