Metal fusion bonding – Process – With protecting of work or filler or applying flux
Patent
1978-10-30
1981-05-05
Ramsey, Kenneth J.
Metal fusion bonding
Process
With protecting of work or filler or applying flux
B23K 1500, B23K 900
Patent
active
042653894
ABSTRACT:
Disclosed is a method of welding a diaphragm to the housing sections of a diaphragm-controlled device. The diaphragm and housings are first clamped together to provide a component of force perpendicular to the areas or seat of the housing which hold the diaphragm. An electron beam directed at, above, and below the sandwich edge of the housing and diaphragm causes a weld to be formed in a portion of the seat. The clamping pressure and expansion of the liquified metal forces part of the metal out of the sandwiched area such that, upon cooling, the housings are brought together against the diaphragm in a secure and pressure-tight weld. In order to weld in a vacuum chamber, it is necessary to remove the gases in the chamber. Diaphragm devices are characterized by the housing having a cavity therein and the diaphragm dividing the cavity into two chambers. Gas evacuation and re-introduction must be controlled to avoid unwanted diaphragm distortion. This is accomplished by providing portals into the housing chambers which are proportional to the volumes therein. The gases thereby pass into and out of the chambers at a rate proportional to the volume, thereby maintaining equal pressures in the housing chambers.
REFERENCES:
patent: 2841984 (1958-07-01), Green
patent: 3458683 (1969-07-01), Canonico et al.
patent: 3793885 (1974-02-01), Frick
patent: 4158311 (1979-06-01), Yasuhara et al.
Furgang Philip
Ramsey Kenneth J.
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