RE: [ATM] bending square aluminium tube

[Charles Mitchard <charlesmitchard@iinet.net.au>]

Check this out,
It should be easy to convert to whatever size material you want to form

Build a slip roll machine
by 
<http://www.amazon.com/exec/obidos/tg/detail/-/1878087142//exec/obidos/search-handle-url/index=books&field-author=Vincent%20R%20Gingery/102-1842745-2652959>Vincent 
R Gingery

http://www.amazon.com/exec/obidos/tg/detail/-/1878087142/102-1842745-2652959?v=glance



>Some 50 years ago my father was a plumbing, heating, and sheetmetal
>contractor and his shop had a number of tools for rolling sheetmetal into
>ductwork.  These were hand-operated crank-driven machines; no such thing as
>a motor.  The best idea would be similar to a hand-operated meet-grinder.
>
>It consisted of three-wheels, 2 below and one over the workpiece, centered
>between the bottom two rollers. The top center roller's position was
>controlled by a wing-nut screw thread that controlled the radius being
>rolled.  Tight curves required multiple passes, always lowering the center
>wheel a bit at a time between passes.  Too big a 'bite' caused it to slip
>and kink the work.
>
>A mechanized, industrial machine to accomplish the work is shown at
>http://www.toolsplus1.com/ringroller.htm (no endorsements implied, its just
>a good illustration).  That image and a bit of imagination may give people
>some ideas.
>
>
>Richard Klappal


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