MOLDING METHOD BY FORGING AND MOLDING METHOD FOR CASE

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EP 1 736 255 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	published in accordance with Art. 158(3) EPC

(15)	Correction information:
	Corrected version no 1 (W1 A1)

(48)	Corrigendum issued on:
	20.06.2007 Bulletin 2007/25

(43)	Date of publication:
	27.12.2006 Bulletin 2006/52

(21)	Application number: 04728001.1

(22)	Date of filing: 16.04.2004

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International Patent Classification (IPC):

B21K 21/02^(2006.01)

(86)	International application number:
	PCT/JP2004/005443

(87)	International publication number:
	WO 2005/099929 (27.10.2005 Gazette 2005/43)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

(71)	Applicants:
	Bosch Automotive Systems Corporation Shibuya-ku Tokyo 150-8360 (JP) Ninomiya Co., Ltd. Ota-shi, Gumma 373-0015 (JP)

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Inventors:

TABEI, Youichi, c/o Bosch Automotive Systems Corporation
Higashimatsuyama-shi, Saitama 355-8603 (JP)
ARAKI, Takashi, c/o Bosch Automotive Systems Corporation
Higashimatsuyama-shi, Saitama 355-8603 (JP)
KOUNO, Shinji, c/o Bosch Automotive Systems Corporation
Higashimatsuyama-shi, Saitama 355-8603 (JP)
YANAOKA, Shoichi, c/o Nimomiya Co., Ltd.
Ota-shi, Gumma 373-0015 (JP)
MIURA, Takashi, c/o Nimomiya Co., Ltd.
Ota-shi, Gumma 373-0015 (JP)

(74)	Representative: Schwabe, Hans-Georg
	Patentanwälte Schwabe, Sandmair, Marx Stuntzstrasse 16 81677 München 81677 München (DE)

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References cited: :

(54)	MOLDING METHOD BY FORGING AND MOLDING METHOD FOR CASE

(57) A material member blanked from metal sheet is subjected to upsetting to form an annular peripheral portion that is thinner than the center part of the material inside the annular portion, and the thicker inside portion is formed into a concavity. The first intermediate product thus formed is drawn to form a cup-shaped case with an internal boss and/or an external boss, and an outside flange. The intermediate product can also be used to make gears and the like.