Re: [CAD_CAM_EDM_DRO] Re: Holding thin sheet

I have made a vacuumm chuck for Damascening (engine turning) It held .060 sheets of aluminum pretty good. The box was made of wood.

As long as your parts have alot of surface area you can get alot of force.
But remember you will never get any more than 14.7 lb/in2 , no matter how hard you suck!!

Jon Anderson wrote:

> > --- In CAD_CAM_EDM_DRO@y..., indigo_red@q... wrote:
> > >
> > > How about a small homemade vacuum table setup. Drill evenly spaced
> > > tiny holes in a sheet of "whatever? alum, Delrin etc"
> > >
> > > ===== =======|======= ======= ===|
> > > | |------->airflow >> ===== Vacuum source
> > > =================================|
>
> As it happens, I'm making a vacuum chuck right now. Have a job that
> requires machining around the entire perimeter with corner radii.
> I'll be drilling the thru holes first, and the vacuum chuck will have
> two locating pins to insure proper location, but the vacuum is all that
> will hold the parts down.
> Job-wise, I'd really be better off just holding the parts down on the
> pins and avoiding the end mill as it goes around the part, but I've
> always wanted to try one, so I am.
> When the job is finished, if I still have an extra or two, I'll drill
> out the registration holes a bit and see if the vacuum alone will hold.
> If it all works out, I'll post a couple pics.
>
> Jon
>
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