Metal working – Method of mechanical manufacture – Impeller making
Reexamination Certificate
2006-08-15
2006-08-15
Look, Edward K. (Department: 3745)
Metal working
Method of mechanical manufacture
Impeller making
C029S557000
Reexamination Certificate
active
07089664
ABSTRACT:
A manufacturing method based on a plastic working technique which can eliminate cutting and welding as much as possible in manufacturing an adjustable blade incorporated in a VGS turbocharger. In the method a blank is punched out from a metal material having a substantially constant thickness to be a shaped material (W) as a starting form for an adjustable blade (1); thereafter, the shaped material (W) is compressed between a pair of opposed dies to form a blade portion (11), a shaft portion (12) and the like having desired shapes; thereafter a non-product portion protruding from a product portion is trimmed; then the shaft portion (12) is rolled by pressing the shaft portion (12) of the shaped material (W) against a pair of dies to have a desired diametrical thickness and a near net shape having a shape and dimensions thereof made close to the aimed at adjustable blade. In a finishing operation the shaped material (W), having the near net shape, is pressed by a pair of opposed dies, so that a desired accuracy of a vane height in a completed state can be achieved.
REFERENCES:
patent: 5403161 (1995-04-01), Nealon et al.
patent: 6050775 (2000-04-01), Erdmann et al.
patent: 6453556 (2002-09-01), Watanabe et al.
patent: 5-123808 (1993-05-01), None
patent: 11-151542 (1999-06-01), None
patent: 2000-301283 (2000-10-01), None
Akita Fine Blanking Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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