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Mandrel bender - bender die and clamp die

Mandrel bender - bender die and clamp die

Mandrel bender - bender die and clamp die

(OP)
Hello
I'd like to build my own tube mandrel bender and I'm wondering about bend die and die clamp dimension tolerances. I have aluminium pipe 22m outside diameter, which has +0,3/-0,2 mm tolerance.
I have mandrel and pressure die, only die and clamp are left. I was looking for few hours trying to find any tips how to make it, but i didn't find. Can anyone help me?

RE: Mandrel bender - bender die and clamp die

"...I have mandrel and pressure die, only die and clamp are left..." I am confused; what do you have left and what are you trying to make?
Also research manufacturers of these items for clues. Back in the 70's I did research tube benders and mandrels and I found a particular line that suited our manufacturing activities; that research was more involved than with today's research tools such as the web.

RE: Mandrel bender - bender die and clamp die

(OP)
I've wrote that only bend die and clamp die i have to make. I'am not sure if mandrel bender or tools producers would like to share their "know how" so that's why i'am asking you. I was looking for on web some drawings or clues but i found only general information

RE: Mandrel bender - bender die and clamp die

Forty years ago, I had access to the SME Die Design Handbook.
I think there was some coverage of bending dies therein.

Or, I could be misremembering. Try to borrow a copy.

Mike Halloran
Pembroke Pines, FL, USA

RE: Mandrel bender - bender die and clamp die

"...if mandrel bender or tools producers would like to share their know how..." If you can get catalogs or brochures, specifications may be available.

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