tube bending - calculating forces involved

[increible]

Hi,
I'm trying to design a tube bending machine, I'm aiming to bend up to Ø2" schedule 40 steel tubes, but first i have to calculate the forces involved in this bending, I've been searching around (like ASM handbooks, Marks' Standard Handbook, etc) but haven't had any luck finding literature regarding the calculation of these forces.

Do any of you know how to calculate such forces, or perhaps someone could recommend to me a good book or paper regarding this issue?

thanks

 

[MikeHalloran]

The phrase "schedule 40" refers to pipe, not tube, so you have to start with the outside diameter, which is not 2".



Mike Halloran
Pembroke Pines, FL, USA

 

[leisure17]

Try bending a piece round a former by hand & see how much leverage is required. it will give you a start

 

[hydtools]

Use a beam equation. Fixed one end, simply supported midway, single force at the free end. The lengths are up to you and determined by your bending setup.

Ted