sheet metal - Am I doing this right?

[lilredex]

Good advice above, here is some further reading:

http://www.autobodystore.com/basics.htm

http://www.repairnation.com/paint_n_...corner_pg1.htm

http://www.autobody101.com/

http://floorpans.pontiac455.com/


Hi all, new to this board.........these are some of my bookmarks.

Edit: Recently purchased a MM135 and also replaced that ground clamp with something more substantial.

[helocat]

Rick,
I've done quite a few patch panels in past few years.
The best way to do this is to invest in a panel flanging tool. I don't know if you're familiar with this tool, but, what it does is it offsets the area to be welded and your panel sits flush with patch. You then have no gap to fill. I usually cut the opening a 1/2" small all the way around, drill 3/16" holes into the patch on the ares to be welded and plug weld the patch in. Then weld the perimeter in with pulsed beads and grind it all down. Most of the time you will be able to metal finish the area or use very little filler to finish.
In the rare instances were a butt weld is necessary, I usually put a backing strip behind the patch. I do this by putting 3/16" holes along the weld area and plug weld the strip in. Then I weld into the strip.
The last technique to use if the backing strip will be visible, and you dont want to use one, is, tack weld the patch in, and use a copper "spoon" behind the weld and pulse weld the perimeter moving the spoon as you proceed with the weld.
I hope this information helps you, it has worked for me the past 30 years or so.

Bow: GOOD STUFF! I had not heard of the "spoon" tech. I like that.

Mark