Re: Square Tube bending

Dies for square tube are often made of two pieces a top and bottng om.
Often the inside surface of the die is crowned or arced. The inside
or id of the bend shrinks considerably and the crowning assists in
minimizing wrinkles. The ouside edge or od often bends in or collapes.
To minimize distortion of od and id, fill tube with sand and cap ends
after bending empty sand. Stretch formers often use sand to minimize
on distortion.

Size of the tubing, wall thicknes, and bend radius are all important
factors in deciding what type process to use. I've built simple dies
for bending 1/2" to 1" square tube in wall thicknesses from .060 to
.120, from heavy plywood cut with a jig saw or bandsaw. More elaborate
and durable dies can be built from heavy walled tubing or sch 40 pipe.


Check out these two sites for some ideas

www.jd2.com/
http://www.shopoutfitters.com/

Good Luck

Doug

--- In CAD_CAM_EDM_DRO@y..., "Smoke" <gordonr@r...> wrote:
> There's a set of plans available thru Lindsay Publications that will
let you
> build your own tubingbender.
>
> Smoke
>
>
>
> >Is there anything special about dies for bending Square tubing?
> >There seems to be very few people who know anything about bending
> >square tubing.
> >Anyone know where I can find info on this? I want to build a set
of
> >my own dies for one specific project.
> >
> >Thanks.
> >
> >
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