Method of manufacturing a valve sleeve

Details Method of manufacturing a valve sleeve Method of manufacturing a valve sleeve

1986-06-02

1987-11-17

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72358, B21K 120

Patent

active

047064870

ABSTRACT:
A method of manufacturing a valve sleeve is disclosed which is adapted to construct an oil rotary valve together with a valve rotor, and a valve sleeve of a configuration which is suitably formed by carrying out the method is also disclosed. The valve sleeve has an axially extending groove in its inner surface, and the bottom surface of the groove has a portion which is disposed at an angle with respect to the axis. The method of manufacturing comprises shaping a cylindrical member having an inner and an outer diameter, both of which are greater than those of a valve sleeve to be manufactured, inserting a punch into the material, and applying a compression to the material from the radially outside thereof to cause the internal surface of the material to bear against the punch.

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