Re: [CAD_CAM_EDM_DRO] Re: 3-axis wire-bending? - Part 2

Hi, sounds like some real good stuff to try,and the nail board discussed
below, they have far surpassed anything i can offer! cul brian f.

----- Original Message -----
From: "ballendo" <ballendo@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, January 24, 2002 2:42 AM
Subject: [CAD_CAM_EDM_DRO] Re: 3-axis wire-bending? - Part 2


> Brian,
>
> Ok, we're talking small stuff. The benders I had in mind for retro
> fitting are large.
>
> It's kinda interesting how this list seems to know what I'm doing. I
> was investigating wire bending by cnc just before this thread came
> up...
>
> Making the machine you have in mind should not be too difficult. The
> design described below could be used for much heavier stock than you
> require, and a simpler approach could meet your needs.
>
> If you use a 5c spin indexer as a "head" you can have the clamping at
> given length, and rotation, simply. (Use a solenoid/air cylinder to
> lock and unlock the collet closer lever arm. Replace the index wheel
> with a timing belt pulley, to a motor for rotation) Add a brake to
> keep it from turning while bending.
>
> A leadscrew driven "bar feeder" behind the head will give you
> increments between bends.
>
> A single "bending arm", either leadscrew driven, or air cylinder
> powered and "stop-limited" by cnc will perform the bending duties.
> This could also be done with a suitably positioned rotary table, like
> the sherline 4" model.
>
> The tricky part is if you need more than 90 degree bends, as the face
> of the collet will get in the way. Same type of problem as with press
> brakes for bending sheet metal. And "gentle" curves need either to be
> done in the same sort of "linear segments" way that arcs are done in
> some cnc, or by using different "bell" housings in front of the
> collet.
>
> Hope this helps.
>
> Ballendo
>
> P.S. Would you please send me offlist a pic of the type of railing
> you hope to do?
>
> P.P.S. One "wiring harness" thing that might be helpful, but won't be
> cnc is a "nail board". This is simply a board with nails driven in
> where the wire harness needs to turn/terminate. If you account for
> springback, and use removeable pins, rather than nails, this may be a
> quick way to make some rails... (if you pull your PB stock through a
> 3 or 4 pin "straightener" first, you could even use coil stock)
>
> P.P.P.S. I'd like to see that organ factory myself...
>
> --- In CAD_CAM_EDM_DRO@y..., "cornbeltroute" <cornbeltroute@a...>
> wrote:
> > Learned great stuff from each response to my question:
> >
> > Steve - I didn't realize the bending device has one pushrod and
> > that the stock is rotated. Key info.
> >
> > Brian F. - I wish to manipulate .008 and similar diameters of
> > phosphor bronze wire into scale model railroad details,
> > particularly the long handrailings found on diesel locomotives.
> > Anything in wire harnessing that could be used in my area?
> >
> > Bill - I will check into spring-making methods; I have seen some
> > Web sites that deal with that, but I passed them by. I'll go back.
> >
> > Ballendo - Existing benders might be retrofitted, you say? Are
> > there info resources you can point me toward?
> >
> > Chris L. - I'll search for tool show locations and show dates; this
> > hadn't occurred to me. Do you recall the sponsor of the show you
> > attended?
> >
> > Jan - Perhaps Austin Organ Co. will take pity on a poor Iowa boy
> > who cannot travel so far to investigate. Just a tip or two where to
> > look in the literature (if any should exist) would be well worth
> the
> > phone call.
> >
> > I send you all my gratitude,
> >
> > Brian Chapman
>
>
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