Re: What are the different ways to Anneal brass?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: fnbrowning</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Sgt_Jamez</div><div class="ubbcode-body">Tripwire - What do you mean by a "lazy rich flame"? Excuse the noobness but I just dont get your meaning. Thanks. </div></div>
Tripwire is a pressure vessel boiler code welder, so he works with equipment that most don't have. Fer instance, I have a Prest-O-Lite Acetylene Torch Outfit, that permits mixing of acetylene with air at the torch head, so no other source of air is necessary. With this it is easy to get a lazy rich (and still HOT) flame.
With most retail propane heads, this is not possible.
But thanx Tripwire . . . you've given me an idea!
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I used to do that stuff, but not anymore.......grin.
Now I'm gonna snap y'alls minds.....
No fancy expensive gear, just a DIY homemade rig........study this picture below.
It's a run of the mill propane torch that under normal circumstances has a very sharp and balanced flame. The problem I find with this arangement is that it's a bit difficult to get an EVEN heat where I want it. I like to wash a wider flame over the neck AND the shoulder, and have the entire area reach temp at the same time. First for savings in actual compounded work time, and second because I want the whole area annealed the same amount and not risk a hot spot.
On this normal burnzomatic torch head I picked up at true value, there are a series of holes that are "air" intakes for the "burn". To "rich" the mixture up just a little, which consequently makes the flame more lazy and "washing", means taking some of the "air" away from the fuel. A rich flame has more fuel than it needs, a lean flame has more oxygen than it needs.
To do this with my plain old burnzomatic torch, I fashioned an aluminum collar that slips down over the torch head, covers the air intake holes, and is locked in place with a small set screw. If you notice in the picture, the air intake holes are all covered up. It just so happens that there is just enough air getting in and under the collar to make the flame just the right amount of lazy and rich. When I made it I had figured that there would be a small sliver of the air intake holes exposed to let enough air into the mixture, but that's not the case. The holes are not completely sealed off, it's just that there's enough air slipping in and around the "looseness" of the collar.
It's also somewhat adjustable too. By unlocking it and slipping it up or down just a minute amount I can make it even more lazy than pictured, or I can point it up more. Where it's at now in the pic is where I have the best luck washing the neck/shoulder with flame. My anneal times per case are probably a tad slower than with a pointed pencil flame, but it's an even annealing, and I like the results.
I would imagine that you could find something in the drawers at the hardware store that you could make a collar out of, steel, brass, aluminum, no matter. I do know for a fact that just wrapping a little tape around the holes and poking pin holes through the tape until the flame is right, works. Though that wouldn't be as adjustable as a collar, and eventually the heat might get the tape and make a mess. You could maybe cut the side out of an aluminum beer can, wrap a piece of it around the holes, and use a small hose clamp to keep it in place. That makes some pretty good sense too.....