Method of making self-lubricating bearing

US6258413A · kind A · utility

Assignee

• Norton Company · US

Inventors

• Peter Woelki · Mönchengladbach, DE
• Dominique Petit · Verton, FR
• Friedrich Harig · Willich, DE

Key dates

• Filing date: Aug 13, 1999
• Grant date: Jul 10, 2001
• Expiry date: Aug 13, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16C2240/60
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A method is provided for fabricating a self-lubricating bearing as a laminate of a metallic substrate and a series of raised structures formed integrally therewith and extending orthogonally therefrom. A fluoropolymer sliding or bearing layer is superposed with the substrate, with the raised structures embedded therein. The raised structures serve to hold the bearing layer in place to help prevent it from sliding along the surface of substrate during bearing operation. This anchorage to the substrate enables a relatively thick bearing layer to be utilized to relatively reduce tendency to creep. Alternatively, the structures provide a bearing fabricated according to the disclosed method having a relatively thin load bearing layer with a relatively constant friction coefficient over its life, with the structures acting as thermal and electrical bridges for relatively high heat and electrical conductivity between the substrate and a supported article such as a rotating shaft. The structures also may be in direct contact with the supported article to help prevent bedding-in. In this regard, the bearings are provided with a relatively low coefficient of friction, long bearing life, resi…