Patent US3571906A successfully refreshed from Google Patents.
US3571906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction bonding of hard-to-grip workpieces
Assignee: Caterpillar Inc
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Filing: 1968-09-26
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Granted: 1971-03-23
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Expires: 1988-09-26
Abstract
Abstract A process for friction or inertia bonding difficult-to-grip parts wherein the parts are mounted within fixtures and a lowmelting-temperature alloy is poured into the fixtures so as to absorb hoop stresses and to prevent relative rotation between the workpiece and the fixture.
Inventors
- 👤 Robert C Barth
- 👤 Marion R Calton
- 👤 Daniel L King
- 👤 Theodore L Oberle
- 👤 Franklin E Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:45
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/12; B23K2101/00; B23K2101/001; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
A method of bonding metal workpieces comprising the steps of: a. mounting a first workpiece in a first holding fixture; b. placing a second workpiece in a second holding fixture; c. pouring a low melting temperature alloy about at least one of said workpieces in its respective holding fixture, thereby forming a cooperative retaining surface between that workpiece and its fixture; d. allowing said alloy to solidify; e. relatively rotating said workpieces at a predetermined speed; f. bringing said workpieces into contact to generate heat; and g. exerting an axial force in the direction of the contacting workpieces.
Claim 2
Independent Claim
98 words
A method of bonding metal workpieces comprising the steps of: a. mounting a first workpiece in a first holding fixture; b. placing a second workpiece in a second holding fixture; c. pouring a low melting temperature alloy about at least one of said workpieces in its respective holding fixture, thereby forming a cooperative retaining surface between that workpiece and its fixture; d. allowing said alloy to solidify; e. relatively rotating said workpieces at a predetermined speed; f. bringing said workpieces into contact to generate heat; and g. exerting an axial force in the direction of the contacting workpieces.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein said step of relatively rotating said workpieces while exerting a relative axial force therebetween occurs while friction-welding said workpieces.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein said step of relatively rotating said workpieces while exerting a relative axial force therebetween occurs while inertia-welding said workpieces.
Claim 5
Dependent Claim
30 words
The method of claim 1 further including the steps of allowing the workpieces to cease their rotating and then heating said alloy and thereby removing it from the welded assembly.
Claim 6
Independent Claim
98 words
A method of bonding metallic parts at least one of which have shape which is difficult to grip comprising the steps of: placing one part in a cavity of a holding fixture; filling the rest of said cavity, without covering the bonding face of said part, with a liquified low melting temperature material to lock the part to the fixture as the material solidifies; allowing said moisture to solidify; and pressing the parts together and rotating them in rubbing contact until they are bonded together and rotation is stopped, and subsequently removing the solidified material from the assembly.
Claim 7
Independent Claim
98 words
A method of bonding metallic parts at least one of which have shape which is difficult to grip comprising the steps of: placing one part in a cavity of a holding fixture; filling the rest of said cavity, without covering the bonding face of said part, with a liquified low melting temperature material to lock the part to the fixture as the material solidifies; allowing said moisture to solidify; and pressing the parts together and rotating them in rubbing contact until they are bonded together and rotation is stopped, and subsequently removing the solidified material from the assembly.
Claim 8
Dependent Claim
59 words
The method of claim 5 wherein said one part is a turbine rotor blade ring and said step of filling said cavity includes the step of filling of the area between the blades of said blade ring with said liquified material, thereby forming a solid ring capable of withstanding hoop stresses created during the step of rotating the parts.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |