Nut forming apparatus

Details Nut forming apparatus Nut forming apparatus

1984-03-21

1986-03-11

Husar, Francis S.

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

10 76T, 10 77, 72356, 72359, B21J 716, B21J 1308, B21K 168

Patent

active

045746095

ABSTRACT:
A nut forming apparatus in which a pair of identical die assemblies are housed in a pair of diametrically opposed boxes in a rotary block and rearward movement of the die assembly relative to the rotary block at a first die station is precluded but rearward movement of that die assembly is allowed as it is moved to a second die station by rotary movement of the rotary block. A fixed back pierce pin, associated with each die assembly, is thus inoperative in response to a front forming blow struck by a punch positioned at the first die station but operates to back pierce the nut blank upon rearward movement of the die assembly in response to a front forming blow struck by a punch positioned at the second die station. A pair of cammingly interfaced cylindrical members associated with each die undergo relative rotation as the die assembly is moved by rotation of the rotary block between the first and second die stations to respectively preclude and allow rearward movement at that die assembly.

REFERENCES:
patent: 460553 (1891-10-01), Burdick
patent: 3154977 (1964-11-01), Schultz
patent: 4019432 (1977-04-01), Dunkin
patent: 4175417 (1979-11-01), Vergnani et al.
patent: 4272978 (1981-06-01), Berecz

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