Method of forming a pressure accumulator

Details Method of forming a pressure accumulator Method of forming a pressure accumulator

1978-02-16

1979-08-14

Envall, Jr., Roy N.

Electric heating

Metal heating

For bonding with pressure

219107, B23K 1108

Patent

active

041646398

ABSTRACT:
A method of forming a pressure accumulator is disclosed which comprises the steps of advancing a cylindrical resilient metallic sleeve carrying a separator or bladder through the open mouth of a shell forming a part of the casing of the accumulator, the shell including on an inner wall surface thereof an annular groove defining an inwardly directed sharpened lip in the casing wall. The sleeve is positioned such that the outer circumference thereof, adjacent its upper end, is disposed in abutting relation to the said lip. An electrode is placed against the upper end of the sleeve opposite the lip at a position remote from the deformable bladder. The shell section and the electrode are relatively rotated about an axis of revolution coincident with the longitudinal axis of the shell while electrical current is passed through the electrode, sleeve, and into the casing, the current flow being sufficient to induce a melting and consequent fusion between components of the metal forming the sleeve and lip portion, whereby the sleeve is secured to the shell section and a seal is defined by the annular fused portions of the shell and the sleeve. Thereafter the open mouth portions of the shells are welded together to define a completed casing.

REFERENCES:
patent: 1982850 (1934-11-01), Banks
patent: 3847182 (1974-11-01), Greer
patent: 3907000 (1975-09-01), Carr
patent: 3925637 (1975-12-01), Becker

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