On Monday, May 20, 2013 1:09:40 PM UTC-4, Lloyd E. Sponenburgh wrote:
Ok, 'solutions guys'...



I have some 0.010" phosphor bronze (spring temper) in rolls 6" wide x

80" long.



I need to cleanly slit some 3/8" strips x 80" from this without any edge

distortion.



We tried taking one a sheet metal house that had a long scissor-type

shear, and it cut it, but also curled the edge too much for our

application. It has to wind flat in a coil when finished.



I've tried sheet metal hand shears without much joy, a nibbler just chews

it, and sawing it on anything we've got is impossible.



We must not heat it. Also cost is an issue, or I'd have it done at a

waterjet and laser house down the road, but they want a couple-hundred

just to set up a job. For only five strips, that's not in budget.



A virgin roll has perfect edges, and rolls tightly. The mill that makes

the rolls from larger sheet stock cannot go narrower than 1".



Any ideas?



Thanks,

Lloyd

Hello,

I have pondered that if I had this problem in my shop I think I'd try this:

Mount ID of roll on an expanding arbor in lathe, pay attention to orientation of roll.

Place two hose clamps on OD of roll, one to left of cut, other to right of cut, about the width of my cutoff blade apart.

Use a sharp HSS cutoff blade to part off 3/8" slice of the roll between the clamps.

Feeds & speeds for this material I couldn't suggest, but should be some info about this available elsewhere.

Move/remove the clamps and do another slice.

First slice cut off would tell you if it's a workable plan, without destroying too much material if it's not going to work for some reason.

G'luck

--
PaulS