Friction welding apparatus
First Claim
1. A method of friction welding a first workpiece to a second workpiece, the process being characterized by the steps of:
- securing said second workpiece in a fixed, nonrotating relationship relative to said first workpiece;
placing the first workpiece in a contacting relationship relative to the second workpiece so as to create a first selected contact pressure therebetween;
establishing a weld containment chamber around said first workpiece;
rotating said first workpiece at a selected speed relative to said second workpiece so as to induce a burn-off phase and an upset phase while simultaneously maintaining positive fluid pressure within said chamber;
gradually increasing a forging pressure between said first workpiece and said second workpiece to a second selected contact pressure; and
terminating rotation of said first workpiece relative to said second workpiece.
17 Assignments
0 Petitions
Accused Products
Abstract
A friction welding apparatus and a method for its use is disclosed where the apparatus includes a plurality of interchangeable components including a drive means, an actuator assembly, a support system and a control system, the combination operable to friction weld a workpiece to a valve body. The apparatus features a means to maintain a positive fluid pressure within the weld chamber during burn-off and upset phases. Such a means is provided to keep out explosive gases emitted by one of the members being welded. The apparatus features a means to maintain a positive fluid pressure within the weld chamber during burn-off and upset phases. Such a means is provided to keep out explosive gases emitted by one of the members being welded.
34 Citations
2 Claims
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1. A method of friction welding a first workpiece to a second workpiece, the process being characterized by the steps of:
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securing said second workpiece in a fixed, nonrotating relationship relative to said first workpiece; placing the first workpiece in a contacting relationship relative to the second workpiece so as to create a first selected contact pressure therebetween; establishing a weld containment chamber around said first workpiece; rotating said first workpiece at a selected speed relative to said second workpiece so as to induce a burn-off phase and an upset phase while simultaneously maintaining positive fluid pressure within said chamber; gradually increasing a forging pressure between said first workpiece and said second workpiece to a second selected contact pressure; and terminating rotation of said first workpiece relative to said second workpiece. - View Dependent Claims (2)
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Specification