The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 2006
Filed:
Feb. 26, 2004
Shoichi Ando, Sayama, JP;
Hiroshi Ono, Sayama, JP;
Tadashi Kobayashi, Sayama, JP;
Mitsuru Kamikawa, Sayama, JP;
Fumio Fukuda, Kikuchi-gun, JP;
Eiki Matsuura, Kikuchi-gun, JP;
Shoichi Ando, Sayama, JP;
Hiroshi Ono, Sayama, JP;
Tadashi Kobayashi, Sayama, JP;
Mitsuru Kamikawa, Sayama, JP;
Fumio Fukuda, Kikuchi-gun, JP;
Eiki Matsuura, Kikuchi-gun, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A method of manufacturing a billet for cold forging according to the present invention is characterized by the first spheroidizing annealing step of spheroidizing a carbide in a blank, the drawing step of drawing the blank at a predetermined sectional area reduction ratio after the first spheroidizing annealing step, and the second spheroidizing annealing step of promoting the dispersion of the internal carbide for an increased spheroidizing ratio after the drawing step. The drawing step has a drawing ratio of approximately 20%. The blank is cut to a desired dimension between said first spheroidizing annealing step and said second spheroidizing annealing step.