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Looking to get into a TIG machine
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<blockquote data-quote="patooyee" data-source="post: 432952" data-attributes="member: 483"><p>So yesterday I was welding up an aluminum luggage rack for the back of my buggy using 1x1 square tube. I was really excited about how it all just clicked with me the other day and I was eager to get back at it. It was going really good 99% of the project, I was stacking dimes like a champ. But toward the end on two of the seams I was welding there was one pinhole on each that ABSOFUCKINGLUTELY would not weld. I couldn't get the flame to center of the hole, it would jump all around it. If I moved the torch over it the arc would wander sideways to the side. Filler would not go in it either. Even if I finagled a drop to fall in via gravity it would jump right out instantly. Heating all around it would cause filler to fuse around it but it would never go in that hole. I could dab on one side and move the heat to the other and the puddle would flow with the torch but pull filler AROUND the hole, not into it. Despite using new aluminum and having cleaned it with the wire brush I figured there must have been some sort of contaminant. So I busted out a flap disc that I only use for aluminum and grinded it all out back down to bare tube, tried again, same spots wouldn't weld. So then I grinded a hole in the mother ****er. I figured there wouldn't be contaminants if there wasn't material to contaminate. Welded the holes closed just fine but then right when I got to where the old holes were new holes formed with the same results as above.</p><p></p><p>Its just a luggage rack and the holes are pinholes. In the grand scheme of things they matter not so I just left them. But I'm still ****ing PO'ed as to what was going on. I used about 30' of filler rod on this whole piece. There were about 75 or so 1" seams that welded perfectly and then these 2 that did for all but 2 pinholes worth. Anyone got any clue what was going on here? I sure would have been pissed off even worse had I been doing a fuel cell with perfect leak-free seams all the way to the last 2 inches and then have this **** happen.</p></blockquote><p></p>
[QUOTE="patooyee, post: 432952, member: 483"] So yesterday I was welding up an aluminum luggage rack for the back of my buggy using 1x1 square tube. I was really excited about how it all just clicked with me the other day and I was eager to get back at it. It was going really good 99% of the project, I was stacking dimes like a champ. But toward the end on two of the seams I was welding there was one pinhole on each that ABSOFUCKINGLUTELY would not weld. I couldn't get the flame to center of the hole, it would jump all around it. If I moved the torch over it the arc would wander sideways to the side. Filler would not go in it either. Even if I finagled a drop to fall in via gravity it would jump right out instantly. Heating all around it would cause filler to fuse around it but it would never go in that hole. I could dab on one side and move the heat to the other and the puddle would flow with the torch but pull filler AROUND the hole, not into it. Despite using new aluminum and having cleaned it with the wire brush I figured there must have been some sort of contaminant. So I busted out a flap disc that I only use for aluminum and grinded it all out back down to bare tube, tried again, same spots wouldn't weld. So then I grinded a hole in the mother ****er. I figured there wouldn't be contaminants if there wasn't material to contaminate. Welded the holes closed just fine but then right when I got to where the old holes were new holes formed with the same results as above. Its just a luggage rack and the holes are pinholes. In the grand scheme of things they matter not so I just left them. But I'm still ****ing PO'ed as to what was going on. I used about 30' of filler rod on this whole piece. There were about 75 or so 1" seams that welded perfectly and then these 2 that did for all but 2 pinholes worth. Anyone got any clue what was going on here? I sure would have been pissed off even worse had I been doing a fuel cell with perfect leak-free seams all the way to the last 2 inches and then have this **** happen. [/QUOTE]
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