Gain extra benefits by becoming a Supporting Member Click here find out how!

Classic Performance Products Classic Industries
American Auto Wire
Danchuk Catalog
Hellwig Products IncPerformance Rod & CustomNu-Relics Power Windows





Username Post: patch panel welding        (Topic#354620)
995jim 
Contributor
Posts: 657
995jim
Loc: Ohio
Reg: 12-17-06
12-29-18 04:06 PM - Post#2755945    

hello, Ive been putting patch panel pieces on my project. some pieces 3"-12" in length and need advise on how to eliminate the metal from sinking or raising. I use spot type tacks but am usually left with areas not filled after I take a scotch loc to it then fill those areas and more grinding.
then its sometimes a slippery slope of metal malformation the more its addressed. Any advise would be great.
thanks jim

Jim

65' Impala SS, 65' Belair, 89' Silverado Z71, 95' Silverado Z71, 12' Silverado, 15' Silverado LTZ, 16' Tahoe LTZ


 




wagonman100 
Site Ambassador
Posts: 15022

Loc: Baltimore, MD
Reg: 11-27-04
12-30-18 07:58 PM - Post#2756060    
    In response to 995jim

The best advice is to only do a couple of tacks and let the area cool off before introducing any more heat in that area. So skip around a lot. When you get closer to finishing, you won’t have as many areas to skip to, so you’ll just have to wait for it to cool down. Also limit the amount of heat you put into the panel while grinding. Welding causes shrinking, so you’ll always have a little warpage. The idea is to limit it.

You may need to metal finish some areas. Which technique to use depends on the damage. If you have a low spot you can get to from the back, you can do some on dolly hammering to stretch the metal a bit where it shrank. If you have low and high spots adjacent to each other, you can do some off dolly hammering to raise the lows and lower the highs.

Also, patches with square corners will shrink more at the corners. Patches with rounded corners will shrink less.

Jay
Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier


 
Ray P W 
Contributor
Posts: 524

Reg: 09-30-15
12-31-18 08:27 AM - Post#2756096    
    In response to wagonman100

Good morning Jim.

The "professionals" just mig weld the patch panels in quick and dirty then cover the whole mess up with bondo.

To avoid that I did my own body work without any bondo when I restored my '36 Chevy PU in the early 1970s. There are probably many ways to weld in patch panels but here's what worked for me.
1. Made patch panels sized for butt welding.
2. Surrounded repair area with wet towels to absorb heat.
3. Tacked panels at approximately 1" intervals with Victor oxy-acetylene torch with #000 tip installed.
4. Welded sections approximately 1" long then cooled area with towels before welding the next section.
5. Hammered the welds to lower their profiles.
6. With hammer, dolly, pick hammer, adjustable Vixen file and "slapping" file worked the area to blend highs and lows for correct contour. With a thin rag under your palm you can actually feel irregularities that you can't see.
7. Shrank the "oil can" areas that inevitably result from the welding.

Metal shrinking is another whole topic that you may already have mastered.

I'm a geologist, not any kind of automotive professional. So I figure if I can do it, anyone can. Like anything, it just takes time.

The results were good enough for my restored '36 PU to win its class (T-2, 1929-36 trucks) at the 1976 VCCA National Meet in Colorado Springs competing against the mega dollar trailer queens. I throw that statement in to make it undeniable that a motivated amateur can do body repair and painting as well or better than the "professionals".

You can do it! Good luck.

Ray W



Edited by Ray P W on 12-31-18 08:29 AM. Reason for edit: No reason given.

 
MPandC 
"8th Year" Gold Supporting Member
Posts: 3355
MPandC
Loc: Leonardtown, MD
Reg: 03-09-06
08-14-20 07:20 AM - Post#2801072    
    In response to Ray P W

value="transparent">

Robert


MP&C Shop Projects


Edited by MPandC on 08-18-20 04:48 AM. Reason for edit: No reason given.

 
Midnight Rider 
"14 th Year" Gold Supporting Member
Posts: 660
Midnight Rider
Age: 62
Loc: Brooklyn Ctr, Minnesota
Reg: 01-19-05
08-14-20 04:41 PM - Post#2801128    
    In response to MPandC

Robert,
Great video. Lots of good tips to work with.
Thanks for sharing.
Bill

Bill
Midnight Rider

1966 Bel Air 2-door sedan
2007 K-2500


 
wagonman100 
Site Ambassador
Posts: 15022

Loc: Baltimore, MD
Reg: 11-27-04
08-14-20 06:58 PM - Post#2801142    
    In response to Midnight Rider

Nice video Robert. Very informative for beginners and experienced folk alike. Thanks for clarifying the “skipping around” advice. I neglected to mention what I meant by it. I get used to the way I do things at work and some things are just second nature. I also weld a lot of seams where I don’t have access for planishing, so I just have to concentrate on limiting shrinkage.

Jay
Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier


 
51 AD 3100 
Contributor
Posts: 125

Age: 53
Loc: Grant, AL
Reg: 08-30-20
01-24-21 05:34 AM - Post#2812804    
    In response to 995jim

pretty sure you mean scotch -brite ...the fiber scuff pad...a scotch loc is an electrical connector.

take your time, spot weld (.23 solid wire/C25 gas)from the middle and go towards the edges. Every few (3-4)inches should work. let it cool , go back and lay the next course of spots halfway on the first spots...again, let it cool before repeating. if theres any distortion,stop welding, hammer it out before you continue.

Life's more fun, in a '51


Edited by 51 AD 3100 on 01-24-21 05:35 AM. Reason for edit: No reason given.

 




Icon Legend Permissions Topic Options
Report Post

Quote Post

Quick Reply

Print Topic

Email Topic

1411 Views
FusionBB
FusionBB™ Version 2.1
©2003-2006 InteractivePHP, Inc.
Execution time: 0.093 seconds.   Total Queries: 17   Zlib Compression is on.
All times are (GMT -0800) Pacific. Current time is 03:16 PM
Top