Method of and apparatus for manufacturing shaft

Details Method of and apparatus for manufacturing shaft Method of and apparatus for manufacturing shaft

2008-02-14

2011-11-08

Ekiert, Teresa (Department: 3725)

Metal deforming

By pulling workpiece through closed periphery die

And applying a 'pushing' force

C072S274000

Reexamination Certificate

active

08051694

ABSTRACT:
A shaft manufacturing apparatus includes a first drawing die having a cylindrical first cavity defined therein which is open at both ends thereof and a second drawing die having a cylindrical second cavity defined therein which is open at one end thereof. The angle formed between a first tapered part of the first drawing die and the axis of the first cavity is greater than the angle formed between a second tapered part of the second drawing die and the axis of the second cavity.

REFERENCES:
patent: 2109312 (1938-02-01), Dimmick
patent: 1175766 (1998-03-01), None
patent: 300149 (1989-01-01), None
patent: 10-036937 (1998-02-01), None
patent: 11-247835 (1999-09-01), None
Chinese Office Action 200810080563.0 issued Jul. 10, 2009.

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