ALUMINUM ALLOY-MADE FORGING-FORMED PRODUCT AND PRODUCING METHOD THEREFOR, AND DIE FOR FORGING AND FORGING APPARATUS, AND ALUMINUM ALLOY-MADE ROTOR BLANK AND ALUMINUM ALLOY-MADE ROTOR

Japanese Patent JP2007075884

A

To provide a method for producing an aluminum alloy-made forging-formed product with which the dimensional precision is improved and after-treatment man-hours can be reduced.

The method for producing the aluminum alloy-made forging-formed product includes a process for forge-forming the formed product having grooving portion parallel to the main forming direction by using an upper die and a lower die having thin sheet-state portion protruded in the forming hole; the formation is started under state of giving the back pressure to the tip end surface in the main forming direction of a blank for forging when forge-forming, and thus, since at the time point when filling-up ratio of the blank for forging into the forming hole becomes a prescribed range, the back pressure is removed, and the dimensional precision is improved and the yield can be improved by reducing the after-treatment man-hours.

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KITAMURA KEIZO

JP2005270418A

March 29, 2007

September 16, 2005

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SHOWA DENKO KK

B21J5/02; B21J5/00; B21K3/04; C22C21/02; F04C18/344; F04C29/00

JP2000117380A	2000-04-25
JPH10296382A	1998-11-10
JP2000140978A	2000-05-23
JPH05337586A	1993-12-21
JPH02213442A	1990-08-24
JP2005153017A	2005-06-16

WO2001077398A1

2001-10-18

Kenzo Fukuda
Shinichi Fukuda
Takemichi Fukuda

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