Shop-Made Fixture Turns Out Dream Welds

You can tell a lot about a person by the company they keep, and you can tell a lot about a craftsman by the tools and jigs he or she builds. Whether for one-off jobs or long-term use, these ad hoc tools, like this tubing rotator for a welding shop, help deliver results beyond the ordinary.

What we appreciate about [Delrin]’s tool is not how complex it is — with just a motor from an old satellite dish and a couple of scooter wheels, it’s anything but complicated. What we like is that to fabricate some steering links, each of which required three passes of TIG welding to attach a threaded bung to the end of a rod, [Delrin] took the time to build just the tool for the job. The tools slowly rotates the rod, letting the welder keep the torch in one position as the workpiece moves under it. The grounding method is also simple but clever — just a wide strap of braid draped over the rod. The result is some of the prettiest and most consistent welds we’ve seen in a while, and with an order for 28 steering links, it ought to be a huge time saver.

It may be time for a little more TIG welding love around here. Sure, we’ve covered the basics of oxy-acetylene welding, and even talked about brazing aluminum. Perhaps your humble Hackaday writer will take the plunge into a new TIG welder and report from a newbie’s perspective. You know, for science.

[via r/welding]

13 thoughts on “Shop-Made Fixture Turns Out Dream Welds

    1. The Woodgears guy is amazing and i wish HaD covered more of his stuff. The only bummer is that half his projects are typically based on at least a few things he already built. But once you’ve got them built…

    1. 3D printed jigs and fixtures to hold 3D printed parts for doing other operations are very simple to make. Model the jig then boolean subtract the part from the jig. Print the jig and it fits the part perfectly.

  1. Dan, if your going to get yourself a TIG. Speaking from a newbies point of view Don’t make the mistake I did and got one that only outputs DC, works fine for steel but no good for aluminium :(

    1. I have to agree. TIG welding aluminium is such a pleasure that it would be a shame to get a machine that don’t do AC. Start by getting the hang of it welding steel, and then moving to Stainless and Al for some beautiful parts :)
      I’m a newbie, by the way, I only have maybe 30 hours of seat time on a TIG, and actually tried to do my first “real part” in Al yesterday, a coolant tank for a CNC machine (just a non-leaking box with a hole for a hose, I’ll see on monday if the gallon of water inside found a way out).

  2. Did a rotary setup long ago for hydraulics used a speed controlled motor on a I-Beam with some 2nd hand chuck and stock tuned in the speeds for a Monkey to weld on it press and go drop the arm with a roller onto pipe and same same weld everytime.

  3. I have worked on commercial versions. Some with about 6″ drive wheels and some that were rotating hundreds of feet of 3′ diameter pipe for pilings. There were being welded end to end with a sub-arc machine. The welding being done in a shack in a construction yard with hole in each side of the building to keep the rain out.

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