Welding critique please

[Mathius]

One other thing to consider when MIG-welding sheetmetal: stitch weld it.

jp

I've always hard stitch welding described as several intermediate tack welds.

I heard you talk about stitch welding on another forum, and you said to drill holes and weld into the holes where the metal overlaps. I've always heard this referred to as plug welding, or spot welding.

It doesn't really matter to me what terminology you use, just as long as you can clarify so I know what you're talking about.

It's definately easier for the novice welder to do either.

However, I caution you to make sure that there is no gaps at the edge of the metal because if water gets trapped in there, your metal will rust from the inside out. Also, it's impossible to paint where your metal overlaps unless you do it beforehand and grind off where you're plug welding, but you still run the risk of your paint or other coating to burn off.



I think if you're going to have any overlapping at all, you'd be better off using a lap joint to keep water out, unless for some reason you can't get to the inside panel.

To prevent rust, your metal has to be either coated, or secured air-tight.

Mathius