Welding question: joining an inner sleeve

Michael Horowitz wrote in
:

On Sun, 23 Sep 2007 11:16:50 +0000 (UTC), Fortunat1 wrote:


Yeah, I've been learning those as well. I found that the rod is a
great help here. when the metal underneath starts to go I start adding
rod to the edge of the hole going around the edge and voila! some of
them even look like rosettes.

Have you worked with heat sinks? Try this: get a heavy steel washer
with a 3/8" hole. Drill an 1/8" hole in a piece of sheet and lay it
over another sheet - you're forming a flat version of the same thing
you do in preparation of a rosette weld. Now center the washer on the
1/8" hole. The heavy washer will wick away a lot of heat and reduce
the amount the upper sheet burns back. The equivalent for tubing would
be 'chill bars', which I'm thing of trying, but also thinking that's
going over-board - MIke


Haen't really tried them yet. None of the info I have mentions them so I
hadn't really thought of it. What I have doen is not cut off ends of tubes
and what not until I've welded them up in order not to blow edges away,
which kind of amounts to the same thing, but I'm going to try it..