METHOD FOR PRODUCING WHEEL BY EXTRUSION AND WHEEL

WIPO Patent Application WO/2010/026780

A1

Provided are a method for producing a wheel having an excellent and uniform mechanical strength; and a wheel. The method for producing a wheel comprises a preparation step (S1) for preparing a molten material by melting a light metal alloy, a casting step (S2) for producing a cast billet (1) by casting the molten material, a preliminary forging step (S3) for producing a forged billet (2) by performing pressure compression of the cast billet (1) so that the forging ratio becomes 3.5 or more, an extrusion step (S4) for producing a pre-wheel (3a) having a temporary disk portion (22), a temporary outer rim portion (7a) and a temporary inner rim portion (8a) by extruding the forged billet (2), a heat treatment step (S6) for heat treating the pre-wheel (3a), and a forming step for forming a disk portion, an outer rim portion (7) and an inner rim portion (8) by processing the temporary disk portion (22), the temporary outer rim portion (7a) and the temporary inner rim portion (8a) mechanically.

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ONO, Kotaro (1-16, Terute 1-chome Fukui-sh, Fukui 24, 〒9100024, JP)
小野光太郎 (〒24 福井県福井市照手１丁目１番１６号 Fukui, 〒9100024, JP)

JP2009/004420

March 11, 2010

September 07, 2009

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WASHI KOSAN CO., LTD. (15-21, Takanawa 2-chome Minato-k, Tokyo 74, 〒1080074, JP)
ワシ興産株式会社 (〒74 東京都港区高輪２丁目１５番２１号 Tokyo, 〒1080074, JP)
ONO, Kotaro (1-16, Terute 1-chome Fukui-sh, Fukui 24, 〒9100024, JP)

B21K1/34; B60B1/06; B60B3/02

SHIRASAKI, Shinji (5F Mikado Bldg, 29-21 Takadanobaba 1-chome, Shinjuku-k, Tokyo 75, 〒1690075, JP)

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