Conveyor rollers and manner of their manufacture

Details Conveyor rollers and manner of their manufacture Conveyor rollers and manner of their manufacture

1992-03-17

1993-08-24

Crane, Daniel C.

Metal deforming

By three or more coacting relatively movable tools

Yieldable face portion or auxiliary tool on tool-couple element

72357, 72370, 72416, 72325, B21D 4104

Patent

active

052378500

ABSTRACT:
A method of reducing the end portion of a pipe to a smaller diameter of exact and smooth dimensions for fitting therein a roller contact bearing comprises the steps of; inserting into the end to be reduced a mandrel of an outside diameter coextensive with that of the bearing to be inserted and of a length coextensive with the predesignated length of the reduced portion; placing the pipe together with the inserted mandrel into a split die having a first portion of a length coextensive with that of the predesignated reduced length of the pipe and of an inner diameter coextensive with the predesignated outer diameter of the pipe, and a second portion of a diameter at least coextensive with the original diameter of the pipe; and placing the die and the pipe into a press for compressing the pipe end by means of the die and the mandrel.

REFERENCES:
patent: 137475 (1873-04-01), Parmalee
patent: 430539 (1890-06-01), Parmalee
patent: 812856 (1906-02-01), Loss
patent: 1104088 (1914-07-01), Wales
patent: 1232974 (1917-07-01), Rateike
patent: 2241091 (1941-05-01), Hood
patent: 2343403 (1944-03-01), Criley
patent: 2638664 (1953-05-01), Maxson
patent: 4722216 (1988-02-01), Fencl
patent: 4881395 (1989-11-01), Shinjo

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