Vertical pierce die

Details Vertical pierce die Vertical pierce die

1984-05-30

1986-11-11

Meister, James M.

Cutting

By tool inside hollow work

One tool having only rectilinear motion

83 54, B26D 100, B21D 2828

Patent

active

046215530

ABSTRACT:
A piercing die assembly for punching a plurality of radially extending holes in a tubular member. The assembly having an open end for receiving a tubular member to be punched. The die assembly having structure for supporting the tubular member in a pre-punching position including radially inner and outer die walls for backing up inner and outer wall surfaces of the tubular member to be punched. A plurality of spaced radially movable punch assemblies are operatively connected with the die structure and having a series of radially movable punches. The punch assemblies having bearings positioned at radially outer ends of the punches and each bearing and its associated punch being radially movable simultaneously together. A vertically movable ring-shaped actuator member is positioned radially outwardly of the punches and is movable axially from a pre-punching position to a post-punching position. A plurality of spaced cams are mounted on the ring-shaped actuator member and are movable up and down therewith from a pre-punching position to a post-punching position and with cams being positioned for contacting and actuating the bearings and the punches to punch holes in the tubular member in a preplanned manner. A press is provided for moving the actuator member from its pre-punching position and actuating said cams to actuate the punches to punch the tubular member.

REFERENCES:
patent: 2325437 (1943-07-01), Temple

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