Oil hydraulic bulge-forming process for the manufacture of front

Details Oil hydraulic bulge-forming process for the manufacture of front Oil hydraulic bulge-forming process for the manufacture of front

1979-12-07

1981-12-15

Gilden, Leon

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72 61, 29421R, B21D 3908

Patent

active

043052690

ABSTRACT:
A straight tubular ferrous blank of a circular section, starting material of the invention is deformed in its section along its whole length and bent to form a fork with two legs or blades, the thus formed tubular fork is set in a sectional forming die of top and bottom molds; the die has a concave corresponding to a protuberant socket and has also at its end an opening into which a mandrel having a recess corresponding to the same protuberant socket is introduced; the tubular fork set in the sectional die is subjected to the oil hydraulic bulge-forming process together with the mandrel simultaneously forced into the opening to bulge-form the socket, and the desired front fork blank of the single unit type is obtained.

REFERENCES:
patent: 588804 (1897-08-01), Porish
patent: 2770874 (1956-11-01), Lindow
patent: 3564886 (1971-02-01), Nakamura
patent: 4047412 (1977-09-01), Holmgren
patent: 4051704 (1977-10-01), Kimura

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