Forming method of bushing with inner sliding surface

Details Forming method of bushing with inner sliding surface Forming method of bushing with inner sliding surface

1992-12-02

1993-11-30

Rosenbaum, Mark

Metal working

Method of mechanical manufacture

Process for making bearing or component thereof

29898059, 72352, 72368, 72700, F16C 3314, B21D 5300

Patent

active

052653358

ABSTRACT:
An inner sliding surface layer of a bearing bushing is formed into a crowning shape in an axial direction by a die shaping method. A bushing blank fitted on a generally-tapered lower end portion of an upper mandrel is inserted, together with the upper mandrel, into a hole in a forming die, and the bushing blank is deformed between the forming die, the upper mandrel and a lower mandrel having an upper end portion similar in shape to the lower end portion of the upper mandrel, thereby obtaining the bushing having the sliding inner peripheral surface of a crowning shape.

REFERENCES:
patent: 2198074 (1940-04-01), Berry
patent: 2289572 (1942-07-01), Underwood
patent: 2338858 (1944-01-01), Lignian
patent: 2722047 (1955-11-01), Cousino
patent: 4048703 (1977-09-01), Lehnart
patent: 4122701 (1978-10-01), Lehnart

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