>Hm...interesting. I hadn't thought of that. The only problem I can
>think of is making sure the bed is perfectly flat, and that the tool
>gets even pressure all the way around. Otherwise some of the circles
>may not cut out.

A normal pneumatic punch would use a proper die (male & female) for
punching, and never punch over a flat surface. The punch will not last
unless this is done so. There is also an air supply fed to the hollow of
the upper punch or to the bottom die using tangential holes (depends which
is overlapping which) that causes air pressure to push out the cut disc
when the plunger rises. This is needed only if the punch-out is complete.
Normal setup is for the male punch to have the air puff and the female die
to be the pickup and evacuate punched goods to a bin under the table. If
the goods are sensitive then they fall on a chute and travel by conveyor.

Peter

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body