Roll die assembly with misalignment damage protection

Details Roll die assembly with misalignment damage protection Roll die assembly with misalignment damage protection

1988-02-16

1989-03-14

Larson, Lowell A.

Metal deforming

Tool and/or tool holder

Having unitary tool-face

72 3, 72465, 2924352, B21D 1900

Patent

active

048115908

ABSTRACT:
A die assembly (12) has a die (14) with a nose (16) positioned to project into the hollow end (106) of an insert (102) being installed in a panel workpiece (100). A pilot pin (32) projects outwardly form the center of the nose (16) and into the insert (102) when the workpiece (100) is properly aligned. The pin (32) is mounted to slide axially relative to the die (14). The pin (32) is biased outwardly but yields under forces exceeding a predetermined magnitude. When the panel (100) is misaligned and a ram (8) urges the panel (100) against the pin (32), the pin (32) retracts to prevent damage to the panel (100). Thrust plates (64) support the die (14) and move radially inwardly when the pin (32) retracts. Feet (22) on the die (14) are received into grooves (70) on the thrust plates (64) to allow the die (14) to retract and thereby prevent the nose (16) from damaging the workpiece (100).

REFERENCES:
patent: 2089795 (1937-08-01), Hodge
patent: 3197854 (1965-08-01), Rohe et al.
patent: 3348292 (1967-10-01), Turner et al.
patent: 3693247 (1972-09-01), Brown
patent: 3875653 (1975-04-01), Schoepe et al.
patent: 3938239 (1976-02-01), Lauth
patent: 4235013 (1980-11-01), Volmer
Specification Sheet from General Magnaplate, Ventura, California re Nedox.RTM. (undated).

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