Looking for Advice on Brazing

Magwych

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The Quill exhaust on my CCM is a lovely compact can, but it is too loud for practical usage.
Taking baffle is a short length of straight through 29mm ID pipe, so it is not really doing much.
I have fabricated an additional tube form perforated stainless and a stainless core plug, there are 130 3mm holes on the tube, whic provide more area than the existing piupe, so I am hoping to have mimnimsed any icrease in back-pressure, whilst disrupting the pulses o reduce the volume a bit.
Now I need to join it all together. I am about to go traipsing around some local welding shops, but had though about using the likes of the GoSystem QP8066H torch with MAPP gas and general brazing rods.
Has anyone used this before, or something similar, and know if it woudl be up to the job?
20170621_125451.jpg
 
Why not rivet it first so it can be more easily altered if needed?
 
Thanks for the thoughts Timolgra. There are 2 answers to your question :
1) It has gone though several heat cycles, the solid pipe has now heat-hardened. Drilling is now a right PITA.
2) Some time over the course of the next few weeks I pack up everything uo to start a new life in Europe, this is my final attemt at sorting th Quill. No success, it goes in the bin.

Even if i did go for a temporary solution in order to test (not a bad idea), if it is successful then my original question still remains.
 
In that case I'd take to someone handy with a TIG welder, it would be done in 5 mins.
 
Have you brazed before ? It's a technique that has to be learned just as welding is
Not since school, no.

My assumptions:
1) get it clean.
2) keep it clean with flux.
3) keep cleaning it wth more flux until it gets up to heat.
4) Make sure it is up to ehat and stays here whilst feeding in brazing rod ( flux coated).
Any major errors there?

I am used to soldering copper etc with lower temperature solders. The main thing, I think, is whether the torch can get the materials up to temperature
 
Thanks Timolgra. Why TIG and not the more common MIG, If you don't mind my asking?
Not that I have many of either close by.

I'm no welder with each so may be talking out of my arse but I understand you can get a finer weld with TIG, anything would do as it's not going anywhere :D
 
Not since school, no.

My assumptions:
1) get it clean.
2) keep it clean with flux.
3) keep cleaning it wth more flux until it gets up to heat.
4) Make sure it is up to ehat and stays here whilst feeding in brazing rod ( flux coated).
Any major errors there?

I am used to soldering copper etc with lower temperature solders. The main thing, I think, is whether the torch can get the materials up to temperature

You need to get the hang of making circular motions with the torch to keep the metal at an equal area of cherry red either side of the joint whilst feeding in the rod with an in out motion, that's why brazes always look like waves

The old buggers who learnt like I did might know a song about Aunty Mary which helped get the rhythm right :rob
 
If it's stainless and the gaps are not too big you can silver solder it quite easily with a butane/propane torch, some flux powder and a couple of 1/16" rods will be plenty.
 
You need to get the hang of making circular motions with the torch to keep the metal at an equal area of cherry red either side of the joint whilst feeding in the rod with an in out motion, that's why brazes always look like waves

The old buggers who learnt like I did might know a song about Aunty Mary which helped get the rhythm right :rob

Lol I remember that song;

Auntie Mary
Had a canary
Up the leg of her drawers
When she farted
Down it darted
Never went there
No more
 
If you were nearer, I'd of TIG'd that up in 5 mins.........

TIG welding is cleaner, puts less heat into the material causing less distortion, and creates no spatter.

Hope you get it sorted.
 
I presume you can braze then :beerjug:
I'm an apprentice trained mechanical engineer, did welding and brazing as part of the fabrication aspect. Its been quite a few years since I last had a go.
Doesn't stop me from appreciating a bit of welding porn now and again. 😁 Have a look on YouTube, there are plenty of videos.
 
Go to a heating \ aircon place and get a couple of fluxed silver solder rods. All you will need is a good blow torch.
Apply a coating of solder (tinning) to both parts and heat and join together once hot enough. the joint will be super strong so you dont need much solder.
No skill needed but you will have to get the metal very hot so a decent blow torch needed.
 
Thanks everyone, especially for the Aunty Mary song :)
For the cost of a tenner, the second "backstreet" (we do not have mnay streets TBH) garage come car auction recycling centre did the job for me.
They even threw in an hour's Xenophobia and specialist Europhobia for free ;-)

20170621_171354.jpg


I still would have liked an excuse to get me decent blow torch, though.
 


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