METHOD OF MANUFACTURING A BALL MEMBER USABLE IN BALL VALVES AND OTHER FLOW CONTROL DEVICES

摘要

Disclosures include a method for manufacturing a ball member usable in a flow control valve. The method comprises connecting a workpiece to a rotating apparatus along an axis of rotation of the workpiece, simultaneously rotating the workpiece about the axis of rotation and moving a rotating cutting tool toward the axis of rotation along a second axis to form a first curved surface having a progressively shorter radius with respect to the axis of rotation, wherein the second axis is generally oriented perpendicular to the axis of rotation, and cutting a bore through the workpiece, wherein one end of the bore extends through the first surface and the other end of the bore extends through the second surface.

主权项

1. A method for manufacturing a ball member usable in a flow control valve, the method comprising:
forming a first curved portion of the ball member by:
rotating the workpiece about 180 degrees about an axis of rotation;rotating a cutting tool; andmoving the cutting tool towards the axis of rotation along an axis of the cutting tool; forming a second curved portion of the ball member by:
rotating the workpiece about 180 degrees about the axis of rotation;rotating the cutting tool; andmoving the cutting tool toward the axis of rotation along the axis of the cutting tool; machining a bore through the first and second curved portions transverse to the axis of rotation.