Punch assemblies and methods for modifying

  • US 9,776,337 B2
  • Filed: 12/07/2012
  • Issued: 10/03/2017
  • Est. Priority Date: 11/06/2008
  • Status: Active Grant
First Claim
Patent Images

1. A punch holder and punch tip assembly, the assembly comprising:

  • a punch holder including a first end and a second end, the punch holder having a sidewall, the punch holder having an axial bore formed therein, the punch holder having a retain-and-release member being pivotable and comprising a pivot shaft pivotably coupled to the sidewall of the punch holder, the retain-and-release member having a retaining portion; and

    a punch tip mounted releasably to the first end of the punch holder, the punch tip having a coupling portion and a working portion, the coupling portion of the punch tip being positioned in the axial bore of the punch holder so as to be contacted by the retaining portion of the retain-and-release member, the working portion of the punch tip including a flange and a punch blade, the flange of the working portion being butted-up against the first end of the punch holder, the punch blade projecting longitudinally from the flange of the working portion; and

    the sidewall of the punch holder has a cylindrical exterior side surface, the flange of the working portion of the punch tip has a cylindrical exterior side surface, and the cylindrical exterior side surface of the sidewall of the punch holder has the same diameter as the cylindrical exterior side surface of the flange of the working portion of the punch tip, such that the cylindrical exterior side surface of the sidewall of the punch holder and the cylindrical exterior side surface of the working portion of the punch tip together form a bearing surface to interface with an internal surface of a punch guide sidewall, when used with the assembly, while the flange of the working portion of the punch tip abuts the first end of the punch holder.

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