Coldwork system with delay split sleeve

Details Coldwork system with delay split sleeve Coldwork system with delay split sleeve

1974-07-17

1976-03-16

Lanham, C. W.

Metal deforming

By relatively receding work-engaging tool-faces

Embodying three or more tools

29446, 72324, 72370, B21D 4102

Patent

active

039437485

ABSTRACT:
A method of coldworking a hole through a work piece which includes the steps of placing a seamless tubular member through the hole in the work piece, passing a mandrel through the tubular member so that the tubular member is expanded radially and circumferentially sufficiently to expand the material in the work piece about the hole beyond its elastic limit, and longitudinally fracturing the tubular member after substantially maximum expansion of the tubular member. The application also contemplates a tubular member construction for use in the method and a tool for performing the method.

REFERENCES:
patent: 2411246 (1946-11-01), Clapper
patent: 2502711 (1950-04-01), Evans
patent: 2507201 (1950-05-01), Evans
patent: 3566662 (1971-03-01), Champoux
patent: 3628246 (1971-12-01), Bronne

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