Hi Dick:
I last worked
as a die maker 50 years ago, so my memories of that die is
limited to breaking the band saw blade over and over. Suffice it
to say just drilling a round hole was too large for the die set,
and wouldn't have worked for the stripper. I think the openings
were in a circle, so think of a band cut into segments with a
small space between each. So a bit like a fat explanation mark
(!).
Then there
was the shuffle die for the grill on an electric heater. It took
4 cycles to punch the holes while the part was shuffled side to
side and front to back. And since the hole count was 20? top to
bottom and 37 side to side the die set had to "PULL" one column
of punches on two cycles. They could have saved a bundle if they
had changed the count to 38!
Carl.
On 2/23/2025 8:45 PM, OldToolmaker via
groups.io wrote:
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Hello Carl.
I am trying to visualize what you mean by keystone shape
punches. I know what a die set is and how it functions. I have
built does well. I just need a little help with shape of
keystone. Most of my career was in plastic mold making and
associated plastic mold design.?
Dick