Method of manufacturing an integrated light-weight solid metal s

Details Method of manufacturing an integrated light-weight solid metal s Method of manufacturing an integrated light-weight solid metal s

1989-04-26

1990-11-06

Eley, Timothy V.

Metal working

Method of mechanical manufacture

Assembling or joining

29508, B23P 1102

Patent

active

049674625

ABSTRACT:
A method of manufacturing an integrated light-weight solid metal shaft for use in a business machine by the steps of subjecting to acid treatment an inner periphery of a seam welded outer metal pipe having high hardness, subject to alkali cleaning an external periphery of an inner cylindrical member such as a solid cylindrical bar or pipe, having both low hardness and weight, inserting the inner cylindrical member into the outer metal pipe, cold drawing forcedly the thus assembled outer metal pipe and inner cylindrical members through a reducing die in order to wrinkle the inner periphery of the outer metal pipe and then integrate tightly the solid cylindrical bar onto the wrinkled inner periphery of the outer metal pipe through plastic deformation of the outer metal pipe and the solid cylindrical bar, internal pressure between the outer metal pipe and the inner cylindrical member and internal heat in the outer metal pipe and the inner cylindrical member caused by plastic deformation.

REFERENCES:
patent: 171440 (1875-12-01), Smith
patent: 2886170 (1959-05-01), Kerr
patent: 3672201 (1972-06-01), Hinshaw
patent: 4270690 (1981-06-01), Mabery et al.
patent: 4403385 (1983-09-01), Kirk
patent: 4541659 (1985-09-01), Nakamura
patent: 4691550 (1987-09-01), Dietzel
patent: 4854148 (1989-08-01), Mayer

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