Methods of welding
First Claim
1. The method of welding, comprising:
- (a) providing at least two housing sections with inner and outer peripheral edges and planar parallel surfaces therebetween;
(b) providing a diaphragm with a planar peripheral portion for being held by at least a part of the parallel surfaces of the housing sections;
(c) sandwiching the diaphragm between at least the two housing sections;
(d) selectively melting the housing sections along the outer peripheral edges of the sandwich, thereby expanding the liquid metal;
the step of melting includes electron beam welding(e) forcing the liquified metal of the housing sections out of the sandwich at the edges by the clamping of the housing sections to provide a component of force perpendicular to the sandwich edges(f) cooling the melted portion of the sandwich to thereby cause the housing sections to solidify and draw together, forming an impenetrable seal and pressure-resistant weld.
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Accused Products
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.
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Citations
28 Claims
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1. The method of welding, comprising:
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(a) providing at least two housing sections with inner and outer peripheral edges and planar parallel surfaces therebetween; (b) providing a diaphragm with a planar peripheral portion for being held by at least a part of the parallel surfaces of the housing sections; (c) sandwiching the diaphragm between at least the two housing sections; (d) selectively melting the housing sections along the outer peripheral edges of the sandwich, thereby expanding the liquid metal;
the step of melting includes electron beam welding(e) forcing the liquified metal of the housing sections out of the sandwich at the edges by the clamping of the housing sections to provide a component of force perpendicular to the sandwich edges (f) cooling the melted portion of the sandwich to thereby cause the housing sections to solidify and draw together, forming an impenetrable seal and pressure-resistant weld. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 26, 28)
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13. The method of removing or supplying gases in a vacuum welding chamber, comprising:
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(a) providing a housing having at least two sections with portals into the sections; (b) providing a member to be welded between the two sections;
the two sections defining a cavity within the housing;
the member dividing the housing cavity into at least two chambers;(c) disposing the member and housings into a vacuum welding chamber; (d) removing gases from the vacuum chamber prior to welding; (e) supplying gases to the vacuum chamber after welding; (f) maintaining predetermined pressure relationships between the housing chambers during the removal or supply of the gases to thereby dispose the member in a predetermined position with reference to the housing. - View Dependent Claims (14, 15, 17, 18, 19, 20, 21, 22, 23, 24)
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16. The method of determining the dimensions of removing and restoring gases to a jig in a vacuum welding chamber so as not to damage fragile parts, comprising:
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(a) providing at least two parts; (b) placing the two parts together for welding, the two parts defining therebetween a part chamber; (c) providing said two parts within the vacuum welding chamber; (d) providing the two parts with at least one port into the port chamber, the part having a known cross-sectional area; (e) providing a jig of at least two sections which together define a jig volume; (f) providing the jig with at least a first and second jig port; (g) placing the parts between the sections so that the port of the part is within the jig volume and the parts separate the jig volume into three volumes and the jig ports are in different jig volumes; (h) determining the volume of one of the jig volumes into which the part port exits; (i) selecting the cross-sectional area of the first jig port so as to be equal to the cross-sectional area of the part port multiplied by the volume of the jig into which the part port exits divided by the volume of the part chamber; (j) selecting the cross-sectional area of the second jig port such that it is equal to the cross-sectional area of the first jig port multiplied by the volume of the second jig volume and divided by the sum of the part volume and the first jig volume thereby causing the flow of gases into and out of the jig chamber volumes to maintain equal pressures therein. - View Dependent Claims (27)
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25. The method of determining the dimensions of removing and restoring gases to a jig in a vacuum welding chamber so as not to damage fragile parts, comprising;
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(a) providing at least two parts; (b) placing the two parts together for welding, the two parts defining therebetween a part chamber; (c) providing the two parts within the vacuum welding chamber; (d) providing the two parts with at least one port into the part chamber, the port having a known cross-sectional area; (e) providing a jig of at least two sections which together define a jig volume; (f) providing the jig with at least a first and second jig port; (g) placing the parts between the sections so that the port of the part is within the jig volume and the parts separate the jig volume into three volumes and the jig ports are in different jig volumes; (h) determining the volume of one of the jig volumes into which the part port exits; (i) selecting the cross-sectional area of the first jig port so as to be equal to the cross-sectional area of the part port mutiplied by the volume of the jig into which the part port exits divided by the volume of the part chamber; (j) selecting the cross-sectional area of the second jig port such that its area to the cross-sectional area of the first jig port multiplied by the volume of the second jig volume and divided by the sum of the part volume and the first jig volume causing the flow of gases into and out of the jig chamber volumes to create unequal pressures therein to distort the parts in a predetermined configuration.
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Specification