Method of treating a tubular member

Details Method of treating a tubular member Method of treating a tubular member

1997-11-06

1999-07-27

Crane, Daniel C.

Metal deforming

With cutting

By composite tool

296231, B21D 2810

Patent

active

059271361

ABSTRACT:
The internal tubular surface of a collector can for a battery cell is processed by planing or ploughing an array of discrete portions of material out of the thickness of the can wall without penetrating the can so as to lift these portions inwardly of the surfaces, while leaving them attached to the can, to positions where they present surfaces facing both towards and away from the can. The lifted portions extend the internal surface of the can and provide couples into the active material of the cell which both physically and electrically bond the material to the extended surface. The process makes use of a segmental array of cutting elements advanced axially into the can, then moved radially to penetrate the can surface and axially or circumferentially through a cutting stroke to raise non-detached shavings on a segment of the internal surface of the can, and then withdrawn using reverse motions. Multiple segmental arrays may be used simultaneously, or the same array may be used sequentially on different segments of the surface.

REFERENCES:
patent: 3753364 (1973-08-01), Runyan
patent: 4194384 (1980-03-01), Fujie
patent: 5376410 (1994-12-01), MacKelvie
patent: 5553476 (1996-09-01), Oehy

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