Method of manufacturing formed component for aircraft use made of aluminum alloy and formed component for aircraft use

Patent metadata

Field	Value
Publication number	US-2015299836-A1
Application number	US-201314647359-A
Country	US
Kind code	A1
Filing date	Dec 19, 2013
Priority date	Dec 21, 2012
Publication date	Oct 22, 2015
Grant date	—

Abstract

A method of manufacturing a formed component for aircraft use according to the present invention includes: subjecting a material made of an aluminum alloy to solution heat treatment; then forming the material into a predetermined shape under cold working conditions; and thereafter subjecting the material to artificial age-hardening treatment. Under the cold working, the material is formed into the predetermined shape while a strain corresponding to a temper T8 is being imparted to the material by a roll forming apparatus. This makes it possible to manufacture a formed component for aircraft use made of an aluminum alloy in a T8 state at a lower cost than conventional art.

First claim

1 . A method of manufacturing a formed component for aircraft use made of an aluminum alloy, the method comprising:
subjecting a material made of an aluminum alloy to solution heat treatment; then forming the material into a predetermined shape under cold working conditions; and thereafter subjecting the material to artificial age-hardening treatment, wherein under the cold working, the material is formed into the predetermined shape while a strain corresponding to a temper T8 is being imparted to the material by a roll forming apparatus.

2 . The method of manufacturing a formed component for aircraft use according to claim 1 , wherein
the roll forming apparatus is a multi-stage roll forming apparatus.

3 . The method of manufacturing a formed component for aircraft use according to claim 2 , wherein
a clearance of at least some of rolls of the multi-stage roll forming apparatus is adjusted to be less than a thickness of the material to impart a compressive strain to the material.

4 . The method of manufacturing a formed component for aircraft use according to claim 1 , wherein
the strain imparted to the material when the forming of the material is performed is a compressive strain or a tensile strain.

5 . The method of manufacturing a formed component for aircraft use according to claim 1 , wherein
the aluminum alloy is an aluminum-lithium alloy containing lithium.

6 . The method of manufacturing a formed component for aircraft use according to claim 1 , wherein
the formed component for aircraft use is a frame or a stringer.

7 . A formed component for aircraft use made of an aluminum alloy, the formed component being obtained by the method of manufacturing a formed component for aircraft use according to claim 1 .

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Okada Hideki
• Ishikawa Chikara
• Yamada Etsuko
• Wada Takumi

Classifications

• B21B1/00

  Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section (B21B17/00 - B21B23/00 take precedence; with respect to composition of material to be rolled B21B3/00; extending closed shapes of metal bands by simultaneous rolling at two or more zones B21B5/00; metal-rolling stands as units B21B13/00; continuous casting into moulds having walls formed by moving rolls B22D11/06); Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations · CPC title

• B21B2003/001

  Aluminium or its alloys · CPC title

• C22F1/04 Primary

  of aluminium or alloys based thereon · CPC title

• C22C21/00

  Alloys based on aluminium · CPC title

• C22C21/14

  with silicon · CPC title