Author Topic: Spot welds  (Read 1861 times)

do8erman

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Spot welds
« on: July 15, 2022, 14:56:25 »
For the home restorer front fenders/ wings can be spot welded to inner fenders to represent original spots with tips available to achieve this ( info on here ) with a hand held machine . The A pillar seems a different story and there seems little info here on that . Not wishing to plug weld and clean which I assume is done on many do some people use a single sided machine for this ?  Would any one know a restoration company  in UK that would be prepared to spot weld panels that have been lightly plug welded to hold in place with there machine . Trying to find how mercedes done this but cannot find the assembly process on this model unlike some others . Overreaching yes but you never know   if you do not ask

ja17

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Re: Spot welds
« Reply #1 on: July 15, 2022, 19:33:10 »
I am sure Mercedes used custom, job specific, spot welding equipment and fixtures on the assembly line. In addition the exact sequence of spot welding panels in place was also critical.
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

Shvegel

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Re: Spot welds
« Reply #2 on: July 16, 2022, 02:42:43 »
The guy who rebuilt my chassis used a single sided machine in a few areas like along the fender tops.  He was obsessed with getting everything just so.  The single sided Lenco machine worked a treat.

do8erman

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Re: Spot welds
« Reply #3 on: July 16, 2022, 12:25:28 »
Thank you for your replies  . It's a hire job from United welding or similar company or purchase and sell as new hardly used  when finished  second-hand kit like this seems to lose very little money now days with prices rising almost daily .

wwheeler

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Re: Spot welds
« Reply #4 on: July 16, 2022, 15:42:24 »
I just looked up the Lenco spotweld mark2 L-4000. I wish I had run across this about 10 years ago when I was welding the panels on the Roadrunner!!! Not cheap but when you are doing close to a 1000 spot welds, it pays for itself. The time savings alone would justify this machine over using plug welds. Looks like there are two electrodes. One does the actual spot weld and the other is a ground of sorts on the back side and doesn't have to be on the same spot as the spot weld.     
Wallace
Texas
'68 280SE W111 coupe
'60 220SE W128 coupe
'70 Plymouth Roadrunner 440+6