[TheForge] copper welding warping

[RIES NIEMI]

Amazingly enough, I had very little problem with the copper warping.
We built a box from 1/8", about a foot square, just big enough for a
canister of ashes, and we used woodworking corner clamps, the little diecast
metal ones, which I often use on right angle work. Then we rolled the pipe
into a big "U" shape, and passed it thru the 1/16" and welded it to a base
plate of 1/8", which was then bolted to the top of a concrete wall.
These were 2 different pieces- the box was separate, with a removable front
I engraved with my boeing surplus gorton engraver.
The pipe arch was on a curved wall, and the owner made a stained glass
window to hang in it. I rolled the 1/16" copper on the slip rolls and
english wheel to form a sort of organic shape that followed the concrete
wall, and it had something like 12 feet of continuous tig weld, and warpage
never reared its ugly head.