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(Text on screen): Welding Preparation for Best Results, Kevin Caron, www.kevincaron.com
The Voice: Hey, Kevin. What are you doing?
Kevin Caron: Well, I've got to make this piece of metal longer,
so I've got to weld a little piece on the end of it right there, and I can cut it to fit in the hole that I need it to go in.
But I've got to prep the metal first.
The Voice: You mean you can't just weld it with it rusty like that? Metal's metal, isn't it?
Kevin Caron: Well, yeah, metal's metal, but rusty, no, no, uh-uh.
The Voice: Why not?
Kevin Caron: Because when you come along with your MIG welder and are just welding along,
what's gonna happen is you're gonna get all that rust;
it's going to get into your weld and contaminate the weld, and you'll have a bad weld and it just won't last.
The weld will be weak, it will break, it will crack. I mean, you don't want to go there.
So, get out the big, old trusty grinder and you've just got to clean all that rust off of the area that you're going to weld.
(grinding)
Bessey welding clamps: You gotta love 'em.
See the difference? Nice and bright and shiny. Red and rusty and not worth working with.
And while I was at it, I also put a little chamfer on the edge.
The Voice: Here, let me get a close-up of that.
Kevin Caron: Here, see this little edge right there, where I was going flat with the grinder across here,
And then I just turned the grinder at a little bit of an angle and I just went across it one time, just to put a little chamfer.
And then I'll just go ahead and do my other piece the same way, so I've got a little -
on the bottom of this piece, it's still vertical, and then it comes up and then out for the chamfer.
So, when I butt these two pieces together, I'll have that wider surface at the top
where I can put a nice, wide bead down inside there so everything will hold together.
I'll flip it over, and I'll also chamfer this side.
So, now I've just got that vertical area right in the middle of the metal, with a chamfer on one side and a chamfer on the other.
Nice weld. Never break. It'll hold up just fine.
That's what I've gotta do. So, clean these all up.
And this is important with MIG. It is even more important when you're TIG welding: clean, clean, clean, gotta be clean.
That's how you get your best welds.
Back to work!
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