Tim Wescott wrote:
I'm working on a project (it's a visual pun -- because if you're going to
name an engine part after a body part, it should look like the body part,
right?)
Basically I'm making a model airplane muffler (of a style called a
_tongue_ muffler, hence the near-obsessive search for a solution just to
make a god-damned PUN) by soldering two aluminum shells together (see
pictures). Later I'll solder the shells to a base that bolts to the
engine. If I just make one shell a little undersized compared to the
other and squeeze them together, I have a honkin' big seam that I'll need
to fill and file to get everything looking nice.
So I'd like to make a shell, then roll a little bead in it, then solder
everything together.
But I can't find any little bead rollers!!!
So, does anyone have any suggestions for what to do (other than perhaps
to abandon the project, or see a good shrink?) I'm thinking that for a
roller all I need are a pair of little wheels that are machined with the
correct 1/32" step, rounded to fit the interior of the shell, running on
bearings in a block and geared together.
Does that sound about right, or is there something I'm missing? I'd like
to make the amount of squeeze between the rollers at least somewhat
adjustable -- are there any known-good ways to do that, or is it
unnecessary?
Thanks in advance.
The pictures are he
https://docs.google.com/file/d/0B5lS...jajVqTWc/edit?
usp=sharing
https://docs.google.com/file/d/0B5lS...DcllvVWs/edit?
usp=sharing
How about a bit more primitive method? Grab a pair of flat nosed pliers
and use a dremel to grind a notch in one jaw face. Then solder a piece
of correct sized round stock in place on the other jaw. Place aluminum
in jaws, squeeze and you have a bead, For corners use needle nosed and
go slow. Good use for the cheap dollar store tools.
--
Steve W.