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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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alum welding with Linc 135plus??
I recently bought a Lincoln 110V 135 Plus mig welder. So far I love
the machine. It works great for what Im doing. I was curious if anyone has tried welding alum. with one of these. I would like to weld some 1x3x11ga. alum tubing. Does anyone have any experience with this? Any help would be great. Has anyone gas(oxy-acet) welded alum? How does that work, I read somewhere that you need special lenses. Thanks for the help, Craig |
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alum welding with Linc 135plus??
Craig Suslosky writes:
I was curious if anyone has tried welding alum. with one of these. I would like to weld some 1x3x11ga. alum tubing. I have the smaller Lincoln MIG version, gas kit, and argon, and have done several aluminum projects. It really only works at all with some practice, and on certain thicknesses of stock. I could do an OK job on 1/8 or 1/4 inch stock. Sounds joints but not very pretty. On 0.050 sheet it would burn through all over. Dunno what "11 ga" is, but it sounds on the thin side. Opposite problem on thicker material, where you can't get a hot enough puddle, and you can wind up with inadequate penetration, especially where corners come together and increase the mass. My best results were a vertical metal stock rack made from 2" square tubing with 1/8 walls. In 7 perpendicular joints, they all came out strong, and a few of the beads even looked close to a real professional type of result. Aluminum is just a difficult material to weld, with its combination of low melting point and high thermal conductivity. The little MIG welders don't deal with that very well. It isn't cheap, either, the wire and the argon gas you'll use. For me it was more for entertainment than anything, doing something exotic yourself, doing little projects that are too small for hiring out. making things you just can't buy off the shelf. |
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