Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Patent
1997-12-23
1999-12-07
Cuda, I
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
29888, B23P 1500
Patent
active
059962267
ABSTRACT:
A process for manufacturing push rod balls including the steps of introducing a metal ball, having an exterior surface, into contact with a carbon enriched medium for an interval sufficient to diffuse carbon into metal matrix forming the exterior surface region and, then, rapidly cooling the carburized metal balls. After the carburized metal balls are cooled, a central bore is drilled through the body of the metal ball. After drilling, the metal ball is brought into contact with a hardening atmosphere at a suitable temperature for an interval sufficient to harden the metal region proximate to the exterior surface of the metal ball. After contact with the hardening atmosphere, the metal balls are oil quenched. The resulting push rod balls have an exteriorly oriented wear surface surrounding an interior core. The interior core is composed of a steel or steel alloy containing between about 0.1 and about 0.2% by weight carbon. A hardened case layer is of an essentially uniform depth is located between the exterior surface and the inner core. The push rod ball has a cylindrical throughbore transiting its diameter. The push rod ball can be positioned on a suitable push rod shaft to provide a push rod assembly in which the weld region connecting shaft to ball extends through the hardened case region into the central core of the push rod ball.
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Cuda I
ITT Manufacturing Enterprises Inc.
Seitter Robert P.
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