Variable depth cold working tool

Details Variable depth cold working tool Variable depth cold working tool

1989-12-01

1990-09-18

Larson, Lowell A.

Metal deforming

Process

Tube making or reshaping

72 36, 29446, B21J 1302, B23P 1102

Patent

active

049569910

ABSTRACT:
A portion of a hole drilled through various layers of structural material may be cold worked by forcing a mandrel through a sleeve lining the hole. In order to precisely fix the projection of the sleeve within the hole of one layer, the thickness is first determined by ultrasonic measurement. Then, a micrometer assembly is employed to project the sleeve outwardly from a tool nose piece by the dimension prceisely equal to the ultrasonically measured thickness. The present tool enables cold working of a hole within only one layer of material while avoiding disturbance of the hole continuation in other layers.

REFERENCES:
patent: 3385087 (1968-05-01), Huth
patent: 4140000 (1979-02-01), Ehmann
patent: 4423619 (1984-01-01), Champoux
patent: 4557033 (1985-12-01), Champoux
patent: 4574612 (1986-03-01), Tanikawa
patent: 4640111 (1987-02-01), Kuless

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