Title: Piercing and coining apparatus

Abstract: Apparatus for piercing and coining a metal workpiece is provided. The apparatus includes a punch and a back-up die which accomplish the piercing, and a coining die located around the punch and movable with respect thereto to accomplish the coining. The punch and coining die are driven by a hydraulic ram which enables the overall apparatus to be relatively compact as compared to most heavy-duty dies and is adaptable for use at a station in a machine which also performs other operations on the workpiece. The workpiece is held precisely in position by a plurality of locators including adjustable fingers which contact and position the workpiece.

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Inventors: Paul, William A. (Toledo, OH, US)

Application Number: 562790
Filing Date: 1975-03-27
Publication_date: 1976-03-16
Assignee:
Primary Class(es): 72/335 72/328, 72/332, 72/432, 72/464
Other Classes:
US Patent Ref:

1920303	Aug, 1933	Grotnes	72/327.
2432804	Dec, 1947	Bieske	72/334.
2700407	Jan, 1955	Trimble	72/333.
2772735	Dec, 1956	Wakelee	83/685.
3146749	Sep, 1964	Heinle	113/1.
3494168	Feb, 1970	Williamson	72/335.
3776016	Dec, 1973	Quinn et al.	72/327.

Other Refs:
Primary Examiner: Lanham, C. W.
Assistant Examiner: Duzan, James R.
Attorney: Gutchess, Jr.; Allen D.