Title:
VARIABLE BLADE MANUFACTURING METHOD AND VARIABLE BLADE IN VGS TYPE TURBO CHARGER
Document Type and Number:
WIPO Patent Application WO/2003/014547
Kind Code:
A1
Abstract:
A variable blade manufacturing method capable of realizing the mass−production of not only a variable blade but also a VGS type turbo charger formed by assembling the variable blade therein, comprising the steps of machining shaft parts to a specified diameter by rolling not by cutting to maximally eliminate a time−consuming cutting operation from a variable blade manufacturing process, remarkably suppressing the extension of the shaft parts and sharp edges due to rolling, and eliminating the cutting operation performed so far to correct the extension of the shaft parts and sharp edges, characterized in that a metal material forming the prototype of the variable blade (1) having blade parts (11) and shaft parts (12) formed integrally with each other is formed in the state of a near net shape where the shape and dimensions of the material near the specified variable blades (1), the shaft part forming parts of the material are rolled to a specified diameter to form the shaft part (12).
Inventors:
OHISHI SHINJIROH (JP)
Application Number:
PCT/JP2002/007941
Publication Date:
February 20, 2003
Filing Date:
August 02, 2002
Export Citation:
Assignee:
SOGHI KOGYO CO LTD (JP)
OHISHI SHINJIROH (JP)
OHISHI SHINJIROH (JP)
International Classes:
B21H7/16; B21K3/04; B23P15/02; F01D17/16; F02B37/24; F02C6/12; (IPC1-7): F02B37/12; F02B39/00; B21K3/04; B21H7/16
Foreign References:
| JP2000301283A | 2000-10-31 | |||
| JPH11151542A | 1999-06-08 | |||
| JP2000301283A | 2000-10-31 |
Other References:
See also references of EP 1422399A4
Attorney, Agent or Firm:
Higashiyama, Takahiko (Chisan Mansion Hontori 23-1, Hontori 3-chom, Shizuoka-shi Shizuoka, JP)
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