Method of manufacturing a ring-shaped member

Details Method of manufacturing a ring-shaped member Method of manufacturing a ring-shaped member

2005-10-13

2010-12-14

Ross, Dana (Department: 3725)

Metal deforming

Process

Tube making or reshaping

C072S393000, C072S402000

Reexamination Certificate

active

07849724

ABSTRACT:
The outer side of a pair of curved parts3dof a longitudinal annular blank is pressed and energized towards the curved part3dof the opponent side with a molding outer die14of a shaping device13to press and widen each curved part3dto a large curved part of large curvature radius, and a half-finished article17is molded, and thereafter, the half-finished article17is pressed and widened by cooperative operation of a finishing inner die of the shaping device and a window part of a perfect circle functioning as an outer die to manufacture a ring-shaped member. Therefore, a yield rate or a percentage of the weight of the ring-shaped member with respect to the weight of the raw material and the yield rate or the percentage of the ring-shaped member with respect to the blank can be improved, and the cost can be reduced.

REFERENCES:
patent: 1091751 (1914-03-01), Mogan et al.
patent: 4467511 (1984-08-01), Collgon
patent: 5526670 (1996-06-01), Parola
patent: 6637248 (2003-10-01), Ishii et al.
patent: 6655182 (2003-12-01), Mattsson
patent: 45-5144 (1970-02-01), None
patent: 58-128231 (1983-07-01), None
patent: 6-47139 (1994-06-01), None

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