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Author Topic: A Cool Method For Bending Tubing  (Read 1644 times)

Offline Dick Fowler

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A Cool Method For Bending Tubing
« on: March 10, 2007, 05:50:36 PM »
I saw this on the Discovery Channel today. They were showing a guy building custom Trombones. When it came time to bend the thin wall brass tubing, he fills the tubes with water, plugs the ends and freezes them. When he bends the tubing filled with ice it doesn't crimp!

HOW COOL IS THAT !  (Pun intended) H^^
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Dick Fowler AMA 144077
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Offline frank carlisle

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Re: A Cool Method For Bending Tubing
« Reply #1 on: March 10, 2007, 06:19:47 PM »
Man that's such a cool idea - it gives me chills!

Did he hve a bending fixture?
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Offline Clint Ormosen

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Re: A Cool Method For Bending Tubing
« Reply #2 on: March 12, 2007, 01:43:23 AM »
I wonder how he keeps the expanding ice from splitting the thin tube?
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Offline Dick Fowler

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Re: A Cool Method For Bending Tubing
« Reply #3 on: March 12, 2007, 05:46:32 AM »
Quote from: Clint Ormosen on March 12, 2007, 01:43:23 AM
I wonder how he keeps the expanding ice from splitting the thin tube?

The caps were simple plastic caps that slipped over the ends. I imagine the caps are pushed out rather than the tubing splitting.
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Dick Fowler AMA 144077
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Offline Howard Rush

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Re: A Cool Method For Bending Tubing
« Reply #4 on: March 12, 2007, 12:57:04 PM »
Did he heat the tubes to bend them?
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Offline phil c

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Re: A Cool Method For Bending Tubing
« Reply #5 on: March 13, 2007, 07:06:13 PM »
The brass should be tempered before bending.  Heat it red hot and quench it in water.  Then fill it with water and freeze it.  Should bend like spaghetti.

Copper tubing is much better to use for fuel lines in tanks though.  It doesn't corrode and split.
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