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.

JPH07164094	MANUFACTURE OF WHEEL, ABOVE ALL WHEEL ESPECIALLY PRELIMINARILY FORMED FOR RAILROAD CARRIAGE, AND DEVICE THEREFOR
JP3900310	CASTING AND FORGING METHOD
WO/2022/197722	MULTI-PIECE EXTRUSION SPOKES FOR WHEELS

ONO KOTARO (JP)
MOCHIKAWA AKIJI (JP)

PCT/JP2009/004420

March 11, 2010

September 07, 2009

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WASHI KOSAN KK (JP)
ONO KOTARO (JP)
MOCHIKAWA AKIJI (JP)

B21K1/34; B60B1/06; B60B3/02

JPH09249951A	1997-09-22
JP2008087066A	2008-04-17
JPH06198382A	1994-07-19
JP2007319895A	2007-12-13
JP2838593B2	1998-12-16
JPS55144351A	1980-11-11

SHIRASAKI, SHINJI (JP)
Shinji Shirasaki (JP)

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