T.Alan Kraus wrote:
On 8/1/2011 11:24 PM, Gunner Asch wrote:
On Mon, 1 Aug 2011 22:34:56 -0700 (PDT), "
wrote:

I want to make an adjustable cheek rest for a rifle stock.

I want to bend the 1" wide Aluminum around a 2" pipe for 180 degrees.

Do I need to anneal it?
Do I need to do it while it is hot?

Thanks in advance.

What kind of aluminum are you planning on useing?

I think if you were going to use the common 6061..you can simply heat it
up, which softens it up, bend it and reharden.

http://www.cnczone.com/forums/bendin...3_16_inch.html


"found the best way to anneal aluminum is with an oxy/ acetylene rig.
Use the biggest rosebud you have, a #8 is plenty big, burn the acetylene
without the oxygen, cote the aluminum with that black nasty soot, turn
on the oxygen to a nice neutral flame, and apply just enough heat to
burn away the soot from the aluminum. Let it cool naturally and your
medium is back to moving like butter. "
--
"The danger to America is not Barack Obama but a citizenry
capable of entrusting a man like him with the Presidency.
It will be far easier to limit and undo the follies of an
Obama presidency than to restore the necessary common sense
and good judgment to a depraved electorate willing to have
such a man for their? president.. Blaming the prince of the
fools should not blind anyone to the vast confederacy of
fools that made him their prince".

Make a carburizing flame with the oxyacetylene torch and deposit a soot
surface onto the aluminum. then flow more oxygen for a hot flame and
heat the aluminum evenly until the soot disappears, then you know the
aluminum is annealed and soft

and if you stay just a second too long, it plops on the floor in a ugly
puddle. AO is pretty darned hot. After screwing up a few pieces I
started using propane to burn off the soot. You can still melt a hole
but you have to work at it a bit more.