PUBLIC Forums => Public Forums => Call For Assistance Feedback => Topic started by: Laura Lightstone on July 11, 2013, 11:01:15 AM

Title: Punch Press Articles
Post by: Laura Lightstone on July 11, 2013, 11:01:15 AM

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!

Title: Re: Punch Press Articles
Post by: Chris Monturo on July 11, 2013, 12:11:09 PM

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 (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)

Title: Re: Punch Press Articles
Post by: Laura Lightstone on July 11, 2013, 12:15:30 PM

Thanks, Chris.  I'll check that out.

Title: Re: Punch Press Articles
Post by: Evan Thompson on July 11, 2013, 01:12:51 PM

                                             Punch Presses (http://www.youtube.com/watch?v=Z26pEs8bocs#)                     

Title: Re: Punch Press Articles
Post by: Steve Scott on July 11, 2013, 02:55:12 PM

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?

Title: Re: Punch Press Articles
Post by: Steve Scott on July 11, 2013, 02:58:41 PM

Yep.  It was CTS Test #11-529.

Title: Re: Punch Press Articles
Post by: Steve Scott on July 11, 2013, 03:09:48 PM

And here are photos...