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(Text on screen): How to Weld Thin Metal to Thick Metal, Kevin Caron, www.kevincaron.com
The Voice: Hey, Kevin. What are you playing with?
Kevin Caron: I got a question the other day: How do you weld really thin metal (here's a piece of 22-gauge)
to thick metal? (this is a piece of eighth-inch plate.)
He's been working on his car; working on his racecar, and it just keeps blowing
right through the door skins and just making a mess; just having a hell of a time.
I thought, well, OK, let me show you a couple of tricks.
Well, what I did was I just cleaned up the eighth-inch plate a little, cleaned up this 22-gauge,
and now I'll just kind of hold it together, put a couple of little tacks on it, and then show you how to weld it.
First, something you've got to keep in mind when you're working with the thin and the thick.
(Come on down here; look down here)
Because this metal is so thin, because the 22-gauge, the sheet, the door panel, whatever it is that you're working on
is so thin, what you're going to want to do is, instead of coming down your joint, or instead of trying to weave back and forth
like you would on normal; on a normal weld like on this piece of eighth-inch plate,
what you're going to want to do is you're going to want to keep all your heat over here on the thicker plate.
And you're going to want to work along the edge of your joint just enough so the puddle can come up and get into your thinner metal.
It's tricky. It takes a little practice to do it. So, let's put the goggles on and we'll take a look at it.
Like I said, you're just going to come in and start on the thick metal and just let your puddle just kinda lap up a little.
You're not going to want to sit here and weave back and forth like you would on a thicker piece.
So, here we go.
(welding)
Just a little bit.
I'm going to come over here and get it here.
(welding)
Eh, let me get it one more time.
(welding)
See what I was doing? Just enough to keep your metal (go on and pick your helmet up);
just enough to keep the heat down on your thicker metal, wherever that may be.
And then you can go ahead and just splash it a little, if you will. Let the puddle just flow up a little.
Catch it with the edge of the puddle.
So, put your helmet back on and we'll come over and just run a little bead along there so you can get a better look at it.
(welding)
Did you see how I was doing that? Keep all your heat; most of your heat . . .
You know; good 80, 90 percent of your heat, down low; down on your thicker metal.
Pick your helmet up.
Remember, you have to have your amperage set or your voltage set for your thicker metal,
because you have to be able to get penetration into that. You know you're going to get penetration into the thinner stuff.
So, don't turn your welder down too far. Make sure you get enough penetration for your thick stuff.
The Voice: What do you have it set at, Kev?
Kevin Caron: Right now, that 251 Miller is set at 19 and a half volts and 283 inches.
And this is 035 wire, running on just a mixed gas: carbon dioxide and argon.
Let me go ahead and get this one last little piece.
Put your helmet back on so you can watch some more.
(welding)
Agh!
You see, it even caught me one time.
There, right there on the edge, here, right here in the corner where it bleeds through on the thinner metal?
It got just a little too hot. Came up a just little too high, snapped right there.
So, just remember, keep most of your heat on your thicker metal.
Keep your welder set for your thicker metal. Don't stand still. Keep moving. You should be fine.
Hope that answers your question. See ya.
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