Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
1998-07-31
2001-04-03
Young, Lee (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S607000, C029S892000, C029S892200, C192S084961
Reexamination Certificate
active
06209191
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
This application is based on and incorporates herein by reference Japanese Patent Application No. Hei. 9-209295 filed on Aug. 4, 1997.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method for manufacturing a pulley integrated type rotor for an electromagnetic clutch, in which a pulley member and a rotor member are integrated with each other.
2. Description of Related Art
Conventionally, as shown in
FIG. 14
, in manufacturing process of an electromagnetic clutch, a pulley member
11
and a rotor member
12
are formed individually, then these are welded to be integrated with each other.
However, in the conventional manufacturing method, it is difficult to ensure a high concentric accuracy between the pulley member
11
and the rotor member
12
connected to each other, because of accumulation tolerances of the pulley member
11
and the rotor member
12
and connection tolerance between these members
11
,
12
. Therefore, the accumulation tolerances and the connection tolerance need to be strictly controlled, thereby increasing the manufacturing cost of the electromagnetic clutch.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a method for manufacturing a pulley integrated type rotor for an electromagnetic clutch.
According to the present invention, an inner cylindrical portion of a double cylindrical portion and a cover member which covers an end side of the double cylindrical portion are formed by plastic-forming a disk material. After that, the disk material is slit inwardly from an outside thereof in a radial direction of the disk material to form an outer cylindrical portion of the double cylindrical portion and a pulley corresponding portion which will be the pulley member. Finally, a pulley groove is formed by plastic-forming the pulley corresponding portion.
Thus, even when the location of the pulley member relative to the outer cylindrical portion are different, same processes can be applied to these different type pulley integrated rotors until the slitting process. That is, different type pulley integrated type rotors can be manufactured with low cost while maintaining high concentric accuracy between the pulley member and the rotor member.
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Kasuya Yasuji
Kawakami Satoshi
Shohara Hiroshi
Tabuchi Yasuo
Denso Corporation
Harness Dickey & Pierce PLC
Trinh Minh
Young Lee
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