1" U in 1/4" copper tube

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gwrdriver
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Re: 1" U in 1/4" copper tube

Post by gwrdriver » Wed Jul 11, 2018 2:10 pm

LivingLegend wrote:
Wed Jul 11, 2018 6:02 am
Keeps the ice from cracking.
My guess would be that the detergent doesn't freeze and provides a lubricant to allow slip movement between the ice and the tube as the bend is made.
I'll be that somewhere in the Blogoshpere there'is a YouTube on "How Horns are Made."
GWRdriver
Nashville TN

Harold_V
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Re: 1" U in 1/4" copper tube

Post by Harold_V » Wed Jul 11, 2018 3:23 pm

Thanks. Interesting subject.
I once was successful in a bid for making several fuel lines from ½" aluminum tubing (defense contract).
Fuel line.JPG
A fixture was built that allowed the bends to be created without filling the tubing. I also built several formed tubes for the Bell helicopter helmet gunsight, which required two bends (offsets) that didn't distort the tubing, so this subject has been of interest to me.

H
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LivingLegend
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Re: 1" U in 1/4" copper tube

Post by LivingLegend » Wed Jul 11, 2018 4:11 pm

DianneB wrote:
Wed Jul 11, 2018 9:25 am
LivingLegend wrote:
Wed Jul 11, 2018 6:02 am
....They also freeze the ice to around -60 or -70 degree range.....
I don't have dry ice in stock either and don't know how else you could get -60 or -70!!
Table salt is more finely grained than most sand.... Try sealing one end of the tube then fill it FULL of table salt instead of sand. Pack the salt tightly and then seal the other end of the tube. You'll want as little internal void (like none) in the tube as possible once it's sealed.

LL
Last edited by LivingLegend on Wed Jul 11, 2018 4:40 pm, edited 1 time in total.
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LivingLegend
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Re: 1" U in 1/4" copper tube

Post by LivingLegend » Wed Jul 11, 2018 4:38 pm

Fender wrote:
Wed Jul 11, 2018 10:43 am
Depending on the degree of bending, one might need to anneal the tube, fill with solution, freeze, bend, rinse, repeat....😀
Nope. Regardless of what they use as a filler in the tubing of the instrument.... Cerrobend, pitch, or ice, they do the bend in one move.... Even complex compound curves.

LL
Do it right.... Or don't do it at all
I have no life. Therefore, I have a hobby
It's not that I'm apathetic, I just flat don't care
An Intellectual is nothing more than an Over-Educated IDIOT
Blogs: Where people with nothing to say..... Say it

John Hasler
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Re: 1" U in 1/4" copper tube

Post by John Hasler » Wed Jul 11, 2018 8:05 pm

Harold_V wrote:
Wed Jul 11, 2018 1:46 am
LivingLegend wrote:
Tue Jul 10, 2018 8:07 pm
They pour the soapy water into the tubing, freeze the tube, and then bend the tube around a form to the radius/curve/shape desired.
Any idea what function is performed by the addition of soap?

H
I think that the soap will cause the solution to gell rather than crystallizing as pure water would.

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gwrdriver
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Re: 1" U in 1/4" copper tube

Post by gwrdriver » Thu Jul 12, 2018 7:44 am

Here you go . . . https://www.google.com/search?q=making+ ... #kpvalbx=1
The pertinent part begins at 3:18.
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Fred_V
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Re: 1" U in 1/4" copper tube

Post by Fred_V » Thu Jul 12, 2018 8:45 am

I've seen a video of trumpet making using pitch too.
Fred V
Pensacola, Fl.

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SteveM
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Re: 1" U in 1/4" copper tube

Post by SteveM » Thu Jul 12, 2018 9:18 am

LivingLegend wrote:
Wed Jul 11, 2018 4:11 pm
Table salt is more finely grained than most sand
Popcorn salt is even finer grain.

Steve

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Builder01
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Re: 1" U in 1/4" copper tube

Post by Builder01 » Thu Jul 12, 2018 11:10 am

Fred_V wrote:
Thu Jul 12, 2018 8:45 am
I've seen a video of trumpet making using pitch too.
Pitch is so they get the notes correct!

David

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BAdams
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Re: 1" U in 1/4" copper tube

Post by BAdams » Thu Jul 12, 2018 11:12 am

:wink: That's a "sharp" comment that could fall "flat". :D

Harold_V
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Re: 1" U in 1/4" copper tube

Post by Harold_V » Thu Jul 12, 2018 4:00 pm

gwrdriver wrote:
Thu Jul 12, 2018 7:44 am
Here you go . . . https://www.google.com/search?q=making+ ... #kpvalbx=1
The pertinent part begins at 3:18.
Thanks for that. It's something I'd never seen, and answered a lot of questions.

H
Wise people talk because they have something to say. Fools talk because they have to say something.

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