Method of forming shaped configuration at end of long element

Details Method of forming shaped configuration at end of long element Method of forming shaped configuration at end of long element

1990-05-11

1991-11-19

Larson, Lowell A.

Metal deforming

With cutting

Machining after final metal-deforming

72344, 2989334, B21D 2800, B21D 4500

Patent

active

050656058

ABSTRACT:
Disclosed is a method of forming a shaped configuration by cold forging at an end of a long element, such as the armature shaft of a starter motor for an automobile. The die used in this method has an inner space in which a section for forming the shaped configuration is provided at one end portion thereof, and the diameter of the inner space gradually increases from the shaped configuration forming section to the other end portion of the inner space. A material is placed in the die from the other end portion of the inner space and then, is forced into the die by a punch to be forged into the shape corresponding to that of the inner space of the die. After the forging, the shaped material is pushed out of the die by a knock-out pin which is inserted into the die in the opposite direction to the direction in which the material is forced.

REFERENCES:
patent: 1617122 (1925-09-01), Kaufman
patent: 2064918 (1936-12-01), Kaufman

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