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Bent Metal Pipe

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Bent Metal Pipe

Unread postAuthor: SpudsMcGee » Mon Feb 09, 2009 8:54 pm

Does anyone know a way to straighten a bent metal pipe, without machinery?
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Unread postAuthor: rp181 » Mon Feb 09, 2009 8:57 pm

stick a rod in, and pull it up. For thick pipe, a hammer might work. How big is it?
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Unread postAuthor: SpudsMcGee » Mon Feb 09, 2009 9:01 pm

6mm, its for my bbmg I'm working on.
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Unread postAuthor: SubsonicSpud » Mon Feb 09, 2009 9:17 pm

You might want to heat it up first depending on how bent it is
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Unread postAuthor: rp181 » Mon Feb 09, 2009 9:31 pm

Heat it up, and just keep rolling it.
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Unread postAuthor: ckman » Mon Feb 09, 2009 9:56 pm

put it in your vice then squeeze it on every side until you have covered the whole piece of pipe, so that it will straighten it out in a straight line.
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Unread postAuthor: sssssbooom » Tue Feb 10, 2009 12:37 am

What I have thought up is find a drill bit that is a tiny bit bigger and drill a hole in something like a 2x4 and then push the tube threw I think it would work but I never tested it
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Unread postAuthor: frankrede » Tue Feb 10, 2009 8:13 am

Depends how bent it is, how long the piece is, how the bend is, and how many bends.
In most cases your going to have to get a new piece if you want a true bore.
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Unread postAuthor: jimmy101 » Tue Feb 10, 2009 1:24 pm

Straightening a bent pipe is probably futile ...

But, you might try capping one end, fill with sand then tamp the sand down hard, probably need someithing like a metal rod and a sledge hammer to get enough tamping force. Keep adding sanding and tamping until the pipe straightens out.

This is similar to one way to bend a pipe without it kinking. Fill with sand, tamp, then bend. The sand will keep the pipe from collapsing at the bend.
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