Spherical plain bearing and method of manufacturing thereof

Details Spherical plain bearing and method of manufacturing thereof Spherical plain bearing and method of manufacturing thereof

1999-04-08

2000-11-14

Jenkins, Daniel J.

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

148225, 2989813, C23C 820, B21D 5310, B21K 176, B23P 1700

Patent

active

061464716

ABSTRACT:
The improved spherical plain bearing of the present invention is formed using a unique method of manufacture which includes surface hardening of the outer ring and the inner ring wherein the outer ring includes a fracture zone having a reduced cross-sectional area which allows the case hardening diffusion technique to penetrate much deeper into the ring fracture zone than in the other areas thereof. In this manner the reduced cross-section area of the outer ring provides a more brittle area with less of the more ductile interior steel which is more difficult to fracture. Such fracturing is necessary with such plain spherical bearings in order to allow placement of the inner ring within the outer ring. The spherical plain bearing produced by this method can include a single fracture or double fracture. Thus this bearing provides significant structural strength due to the inner core of softer more ductile steel while at the same time providing enhanced wear characteristics due to the case hardened outer layer on both the inner and outer races.

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