Method for producing a cross-slotted heading die

Details Method for producing a cross-slotted heading die Method for producing a cross-slotted heading die

1978-10-16

1980-12-30

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

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

72359, 72374, 72376, 72377, 76107R, B21D 2200

Patent

active

042415985

ABSTRACT:
A method and apparatus are provided for producing a cross-slotted die for forming cross-slotted screw heads. One end face of a cylindrical blank is turned to form a cone having a cone angle of between 124.degree. and 140.degree.. The cross shape is produced in this face by a single cold forming stage while preserving the outer diameter of the blank. The blank is held in a cylindrical holder having a bore with an internal diameter corresponding to the diameter of the cylindrical blank. An ejection mandrel engages in the bore to form the base of the holder. A platen carries a punch for insertion into the bore to deform the end face of the blank.

REFERENCES:
patent: 2066372 (1937-01-01), Tomalis
patent: 2140670 (1938-12-01), Donbeck
patent: 2417569 (1947-03-01), Rice
patent: 2633765 (1953-04-01), Glasner
patent: 2699693 (1955-01-01), Stellin
patent: 3650163 (1972-03-01), Juffs

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