Brazing Guide

Quote:

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Originally Posted by Thrilla

WOW... I went to use a bigger, meaner, stronger torch today... took me 30min to braze a desuperheater to the condensor :eek: lol the copper kept melting and steel n' copper doesn't heat up at the same rate...

Question:
What should I use as a heat shield when brazing the compressor?

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In above scenario, subject heat only to copper part about half an inch away from steel part... steel part hold heat much more than copper so you need to apply less heat (pretty much heat flowing from copper is good enough.
Hmm... wet rag of tower or there are those gel sprays and clay things that absorbs heat. You Really DON'T need one for compressor though... there are even some painting around compressor which could catch fire I think if you have to worry about that.

Yep, I figured. (Flux and) Heat up the copper first, when it gets red, heat both the copper and steel. They will both get glowing red very soon, apply 45% silver rod and let it flow :D

The new torch is pretty hot, so I want to protect everything for safety reasons.

Is this Bernz-o-matic oxy torch set good for brazing? I can use propane to heat pipes up to dark red and use this to braze, no?
http://img478.imageshack.us/img478/7...cc34eb94za.jpg

Quote:

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Originally Posted by Thrilla

Is this Bernz-o-matic oxy torch set good for brazing? I can use propane to heat pipes up to dark red and use this to braze, no?
http://img478.imageshack.us/img478/7...cc34eb94za.jpg

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I have that set up and it works great. the only downfall is the oxygen goes relatively quickly and is about $9 a bottle, other then that its great.

It's $12 a bottle here, but a few joints shouldn't be a problem, thanks for the input!

Hello there :cool:

COuld someone give me an idea of how can i braze the cap tube too the filter please? i've tryed, but the captube continues to be seeled after the brazing :mad:

Push the captube bout a half inch or so into the filter/drier.

UPS :S
GOD I'M REALLY N00B!! lol

tnkx once again

Hey there,

I'm planning on making my own VGA tube. My idee was to use an alu heatsink and braze some other metal plates on it resulting in a cube tube design. I know, it's getto, but it will cost me only some gas.

I saw the movie a few pages ago, it looks easy, but... is it easy i.r.l.?
People told me that ist's not. Any knowledge to share about this, I'm a virging when it comes down to brazing/welding. I have a brazing set available, and also a soldering set. My thought was to heat up the base with a coocking plate to make it easier brazing.

your Idea is more complex than you realize. .......aluminium is usually joined with a MIG or Tig welder.........gas welding, well as you heat your aluminum it will be there one second and in a instant it will be a molten Blob......

Also joining dissimilar metals can not always be done so simply,especially aluminum,reconsider that choice for copper or be happy with a all aluminium tube. You just say "other metal plates"

I agree with wdrzal, although aluminum can be brazed together, it's very difficult, and mostly used for production parts with very well controlled furnaces. Usually the filler metal melts only about 30F to 100F lower temp than the alloy, and some alloys like 6061 which is very common for a machined part melts at a temp very close to the filler metal. I know some guys that can do it, but they are professional automotive prototype guys, brazing aluminum by hand I end up with a melted part about half the time, it's just too difficult. Copper is lovely to braze, and it has better thermal properties.

I've done some reading too, it really seem that I will not be able to do this. No tools/skills. Damm, I allready prepared that Alu heatsink :s
Ah well, maybe I can modify it for using it as memory heatsink, allthough most part of it is not usable anymore.

I've a D-Tek Whitewater wich had his best since a while, maybe I'll use that thing to build my tube. Thx for the info. If you're interested in the result, visit the LN2 section of this forum once in while, I have until newyear to finish this project (it will be used for a local VGA OC competition).