scootz
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| posted on 13/10/11 at 07:14 PM |
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Bending Box-Section
Can it be done without kinking?
It's Evolution Baby!
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HowardB
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| posted on 13/10/11 at 07:19 PM |
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obvious questions, like,..
how big, how thick, and how far??
If the answer to any or all of those is ummm quite a bit, then the answer is generally no without special kit,....
hth
Howard
Fisher Fury was 2000 Zetec - now a 1600 (it Lives again  and goes zoom)
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liam.mccaffrey
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| posted on 13/10/11 at 07:20 PM |
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yes a tube bender, with a square section die will do it.
What size do you want to do? I am thinking of making a square die for my bender
[Edited on 13/10/11 by liam.mccaffrey]
Build Blog
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scootz
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| posted on 13/10/11 at 07:40 PM |
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I was thinking 25mm x 25mm x 1.5mm...
It's Evolution Baby!
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balidey
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| posted on 13/10/11 at 07:50 PM |
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I have massive box full of that tube size with 90 deg bends, they are 'kinked' in a way where the inner and outer faces are formed in, the
sides are flat. It looks pretty good and were all machine done. If you want some and they are any good to you I can post some up, they have about a
foot of unbent section each end. You can weld them onto your box.
Or to try to bend it without kinking (much) and without a former, pack with DRY sand, seal both ends, heat and bend round a rough former.
Dutch bears have terrible skin due to their clogged paws
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MakeEverything
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| posted on 13/10/11 at 08:25 PM |
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quote:
Originally posted by scootz
I was thinking 25mm x 25mm x 1.5mm...
I went too quick over a hump back bridge and bent the subframe of my 60 place laguna, so yes its possible.....
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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Confused but excited.
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| posted on 13/10/11 at 08:56 PM |
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Didn't they used to fill it with lead first to stop kinking, bend it, then melt the lead out. This would be back in the days before hydraulic
computerised mandril benders. Come to think, they probably used a low melting point alloy like Wood's metal.
Tell them about the bent treacle edges!
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MakeEverything
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| posted on 13/10/11 at 09:22 PM |
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quote:
Originally posted by Confused but excited.
Didn't they used to fill it with lead first to stop kinking, bend it, then melt the lead out. This would be back in the days before hydraulic
computerised mandril benders. Come to think, they probably used a low melting point alloy like Wood's metal.
It was kiln dried sand i think.
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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907
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| posted on 14/10/11 at 07:30 AM |
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In my experience the outer face of the bend tends to collapse in and becomes concave.
Not sure if you can see this in the photo of my o/s engine mount but this is 25 x 25 x 3mm wall.
I would think that in 1.5 wall this would be more pronounced.
I only needed 45 deg so not to bad. Had I bent it more I think it would have collapsed more.
 
25x25x3 box engine mount
Cheers,
Paul G
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40inches
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| posted on 14/10/11 at 07:49 AM |
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MK's have a couple of that are bent, the inside of the bend is collapsed inwards, no other way really.
 
Coolant pipe fixing
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MikeR
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| posted on 14/10/11 at 06:13 PM |
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How much pressure is needed to bend 1" 1.6mm steel? I've often wondered how difficult it would be to make a former and bend it myself.
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907
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| posted on 14/10/11 at 06:32 PM |
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quote:
Originally posted by MikeR
How much pressure is needed to bend 1" 1.6mm steel? I've often wondered how difficult it would be to make a former and bend it myself.
I used an 8 tonne jack to bend that 3mm wall s/s in the earlier pic, if that's any help.
Paul G
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mad-butcher
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| posted on 14/10/11 at 06:46 PM |
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quote:
Originally posted by MakeEverything
quote:
Originally posted by Confused but excited.
Didn't they used to fill it with lead first to stop kinking, bend it, then melt the lead out. This would be back in the days before hydraulic
computerised mandril benders. Come to think, they probably used a low melting point alloy like Wood's metal.
It was kiln dried sand i think.
seen on "how it's made" forming brass bends for a trombone by filling with water and then freezing
tony
[Edited on 14/10/11 by mad-butcher]
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40inches
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| posted on 14/10/11 at 07:40 PM |
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The Locost way Linky
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