Round tubing help

[Upnorth]

I need help....
I havent worked with round tubing before. I'm trying to build this snowboard waxing stand. I usually use square tubing but for this I bought 1" .065 round crew tube.

I expected a bit of warp but the first weld (coped by hand with a grinder) turned the base into more of a rocking horse than a saw horse.

I saw somewhere a picture of a bracket/vise made for welding up railings but cant find it now, any help?

I do know that even clamping wont stop this. I was thinking about heting the other side and quenching the side oposite the weld.....

[mauricio_daniel_62]

Maybe can help.

[Upnorth]

Thanks but the cope isn't the issues, it's the warping after the weld cools.....

[bearston]

Did you weld the joint all the way around the seam at once? Sounds like too much heat at once which caused the tube to pull. Perhaps welding short 1/2 " to 1 inch beads and then letting them cool before continuing would minimize distortion. Too much continuous heat will pull and change the shape of any relatively thin walled tube or plate.

[Upnorth]

Yup, tonnes of heat poured in, I even blew a hole and filled it in for good measure......
Im tig welding with a Maxstar 150 with no foot control. I'll drop the amps and work on my patience.
The aim is to learn, if it was all about the project I would have mig welded it with square tube and been done already, but where is the lesson in that?

The goal now is to try to convince this joint to be straight again.....

[allfluxedup]

Looks just like my $30 keyboard stand......but seriously, if you welded the entire thing from round tube thats probably part of then issue. In my experienced it is difficult to weld a round joint without using a positioner . I have done round joints on thin walled , even on thick walled tube and due to the awkward path of the weld I tended to sit in one spot a little too long. If I had someone roll the peice for me it went faster,travel speed wise, the weld was smoother and I did not burn through. All that equates to less heat , smaller HAZ and less warpage/distortion. Best bet is to either use square tube for the uprights for easier joints or weld as was mentioned above , backstepping it. Good luck trying to warp it back. Maybe relief cuts and new welds and some grinding might help-.......or just scrap it and start over. I tried to make something similar once and it got shorter and shorter until I bought one at the store.
Mike