Message:

<p>[QUOTE=&quot;Oldhoopster, post: 7474783, member: 84179&quot;]Then where is the evidence of the tearing from the punch and tear characteristic of the blanking process?</p><p><br /></p><p>Why wouldn&#039;t the compression of the metal during the upset mill process erase most /all of the the cut and tear remnants?</p><p><br /></p><p>Why does the higher striking pressure&nbsp; during Proof production leave these artifacts, but its not seen with lower pressures used for business strikes (per the observations of the OP)? </p><p><br /></p><p>Wouldn&#039;t multiple strikes during proof production force the metal towards the collar and eliminate most/all of the blanking marks that made it past the upset mill and also contribute to collar abrasion/erosion like worn dies?[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in