chriscook
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| posted on 26/8/05 at 04:38 PM |
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My point was that the caterham chassis is brazed (by Arch), caterhams are all SVA'd. Therefore brazing must be acceptable for SVA.
(The cracking comment just comes from part of my job being fatigue analysis)
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JoelP
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| posted on 26/8/05 at 04:49 PM |
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i picked up the mig for the first time in around a year, and was delighted to find im no worse than before!  Which is just as well, as there's
a bed and a pair of gates to make!
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907
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| posted on 26/8/05 at 07:07 PM |
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Hi All.
I think this thread is getting confused.
Brazing, using a brass filler rod, is a capillary joint.
The brass flows between two layers the way solder does,
and as with solder, cleanliness is paramount, hence it's
outlawed for the welding of cars for Mot.
Chassis are Bronze Welded. A totally different ball game.
Bronze, when molten, has a higher surface tension, and is bead forming,
hence it can be used for welding fillets.
It does however flow through the joint to a certain extent, and form
a penetration bead on the underside.
Sorry chaps, just had to say that. The incorrect use of the term "brazing"
is one of my pet hates. Rant over.
Paul G
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Rorty
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| posted on 26/8/05 at 10:01 PM |
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quote:
Originally posted by JoelP
i picked up the mig for the first time in around a year, and was delighted to find im no worse than before! Which is just as well, as there's
a bed and a pair of gates to make!
Bed? Gates? Have you got a really ugly wife? 
Cheers, Rorty.
"Faster than a speeding Pullet".
PLEASE DON'T U2U ME IF YOU WANT A QUICK RESPONSE. TRY EMAILING ME INSTEAD!
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Rorty
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| posted on 26/8/05 at 10:09 PM |
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quote:
Originally posted by 907
Hi All.
I think this thread is getting confused.
Brazing, using a brass filler rod, is a capillary joint.
The brass flows between two layers the way solder does,
and as with solder, cleanliness is paramount, hence it's
outlawed for the welding of cars for Mot.
Chassis are Bronze Welded. A totally different ball game.
Bronze, when molten, has a higher surface tension, and is bead forming,
hence it can be used for welding fillets.
It does however flow through the joint to a certain extent, and form
a penetration bead on the underside.
Sorry chaps, just had to say that. The incorrect use of the term "brazing"
is one of my pet hates. Rant over.
Paul G
Brass alloy glue!
I'm aware of the differences of the two procedures (I've brazed (OK...bronze welded) more than one hillclimber). I think brazing has just
become the modern day generic description of joining metal parts with brass/zinc or brass/tin and a gas torch.
The question still stands; does SVA have a problem with it and why?
Cheers, Rorty.
"Faster than a speeding Pullet".
PLEASE DON'T U2U ME IF YOU WANT A QUICK RESPONSE. TRY EMAILING ME INSTEAD!
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johnjulie
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| posted on 27/8/05 at 08:51 PM |
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Bronze welding uses an alloy of 60% copper and 40% zinc. Giving a stronger joint than brazing.
Cheers John
JFDI
"Just F*****G Do It"
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Rorty
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| posted on 27/8/05 at 10:01 PM |
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quote:
Originally posted by johnjulie
Bronze welding uses an alloy of 60% copper and 40% zinc. Giving a stronger joint than brazing.
Cheers John
BRASS is usually 67 percent copper and 33 percent ZINC, but BRONZE is made from copper with TIN and often other metals like nickel and with normally
only trace amounts of zinc.
Brazing uses a rod that melts at about 450 degrees C. In other words, the rod melts, the metal doesn’t. Brazing uses capillary action, which is
similar to a paper towel absorbing water. The metal is heated and a brass rod is melted onto the surface. The process uses adhesion (it sticks to the
surface) versus cohesion (when the filler metal becomes one with the metal, Grasshopper) as in braze/bronze welding. In brazing, the metal being
brazed does not melt.
Cheers, Rorty.
"Faster than a speeding Pullet".
PLEASE DON'T U2U ME IF YOU WANT A QUICK RESPONSE. TRY EMAILING ME INSTEAD!
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johnjulie
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| posted on 30/8/05 at 06:39 PM |
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"Cohesion", is when two metals stick together, "Fusion" is when two metals join together.
Cheers John
JFDI
"Just F*****G Do It"
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Peteff
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| posted on 30/8/05 at 07:45 PM |
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What's welding then? Where has it gone to or is it fusion or fission? I've lost the thread here, am I becoming incohesive? Anybody going
to mention mig brazing just to add more fuel to the fire. I'm using Marmite to stick my next chassis together, try getting the lid off that
after it's welded itself on for a couple of weeks. Joel, if you have to go to those lengths to keep her in it's time you let go, set her
free you know it's the right thing to do
[Edited on 30/8/05 by Peteff]
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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Simon
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| posted on 30/8/05 at 08:52 PM |
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Well, My chassis was TIG welded, I do bronze/mild and stainless welding at work. Also do soldering for small metal imperfection but
generally avoid cos it's a pain in the final colouring process
And, the best bit, now my car is nearly finished, I finally bought a MIG. Never done it before, but just been playing with it. How easy is
that!!!!!!!!!!!!!! Bit more playing around and I'll be happy
BTW It's an ESAB C150. Comments welcomed
ATB
Simon
[Edited on 30/8/05 by Simon]
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JoelP
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| posted on 30/8/05 at 09:01 PM |
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quote:
Originally posted by Peteff
Joel, if you have to go to those lengths to keep her in it's time you let go, set her free you know it's the right thing to do
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