Punch Press Articles

[Laura Lightstone]

Does anyone know where I can find an article (AFTE or other) on toolmarks created by a punch press?  A keyword search in the Journal index comes up empty.  Not finding anything in two books I have on tools either:  Tools and How to Use Them & Cutting Tool Applications.  Thanks!

[Chris Monturo]

Punch Press is the machine.  The dies do the work and the action is shearing.  Using those terms may help in finding more articles. Here is a pretty good one.

http://books.google.com/books?id=1ZOXXV9LdcwC&pg=PA435&lpg=PA435&dq=shearing+action+of+metal&source=bl&ots=CwD7CzptVw&sig=r5RajmJtYrKUl8FGlA30M51WNUw&hl=en&sa=X&ei=o9jeUdHIFqKTyAHri4GwBg&ved=0CHwQ6AEwDg#v=onepage&q=shearing%20action%20of%20metal&f=false

[Laura Lightstone]

Thanks, Chris.  I'll check that out.

[Evan Thompson]

                                             Punch Presses                     

[Steve Scott]

Didn't we have a toolmark proficiency a couple of years back that was trying to match punched out pieces of metal to the source?

[Steve Scott]

Yep.  It was CTS Test #11-529.

[Steve Scott]

And here are photos...