US3928901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming a cladding sheet to a convex/concave substrate
Assignee: General Electric Co
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Filing: 1974-10-10
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Granted: 1975-12-30
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Expires: 1994-10-10
Abstract
Abstract A sheet cladding is closely preformed to a convex-concave substrate by a method including the steps of rough forming the sheet cladding about the substrate so that the sheet cladding closely abuts the convex surface of the substrate while being spaced from the concave surface of the substrate. The sheet cladding, assembled to the substrate, is placed into a rubbery mold which is thereafter sealed and cold isostatic pressure is applied thereto so that the portion of the cladding sheet opposite the concave surface is deformed into the concave surface thereby stretching the sheet cladding to form a tight skin over the substrate.
Inventors
- 👤 William F Schilling
- 👤 Adrian M Beltran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:52
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/02; B21D26/021; B21D26/053; B21D26/059; B21D49/00; B23; B23K; B23K20/00; B23K20/02; B23K20/021; B23P; B23P15/00; B23P15/04; F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/288; F05; F05D; F05D2250/00; F05D2250/70; F05D2250/71; F05D2250/711; F05D2250/712; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49337; Y10T29/49826; Y10T29/49908
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
A method of preforming a sheet cladding to a substrate having a concave-convex surface, the method comprising the steps of: a. rough forming the sheet cladding to the substrate so that the sheet cladding closely abuts the convex surface of the substrate while the sheet cladding opposite the concave surface of the substrate is spaced from the concave surface including: i. fastening one edge of the sheet cladding to the convex surface of the substrate; ii. joining the other edge of the sheet cladding to the one edge of the sheet cladding to define a seam on the convex surface of the substrate;
Claim 2
Independent Claim
103 words
A method of preforming a sheet cladding to a substrate having a concave-convex surface, the method comprising the steps of: a. rough forming the sheet cladding to the substrate so that the sheet cladding closely abuts the convex surface of the substrate while the sheet cladding opposite the concave surface of the substrate is spaced from the concave surface including: i. fastening one edge of the sheet cladding to the convex surface of the substrate; ii. joining the other edge of the sheet cladding to the one edge of the sheet cladding to define a seam on the convex surface of the substrate;
Claim 3
Dependent Claim
40 words
The method recited in cLaim 1 further comprising the steps of: a. annealing the sheet cladding; and, b. cutting the sheet cladding into a blank to approximate the unfolded outer surface of the substrate prior to the rough farming step.
Claim 4
Independent Claim
116 words
A method of preforming a sheet cladding to a substrate having a convex-concave surface, the method comprising the steps of: a. rough forming the sheet cladding to the substrate so that the sheet cladding closely abuts the convex surface of the substrate while the sheet cladding opposite the concave surface of the substrate is spaced from the concave surface; b. placing the sheet cladding and substrate assembly into a sealed rubbery mold including: i. inserting the rubbery mold into a rubbery sleeve; ii. sealing each end of the rubbery sleeve with an end plate and clamp; and, c. applying isostatic pressure to the mold to deform the sheet cladding into contact with the substrate concave surface.
Claim 5
Independent Claim
116 words
A method of preforming a sheet cladding to a substrate having a convex-concave surface, the method comprising the steps of: a. rough forming the sheet cladding to the substrate so that the sheet cladding closely abuts the convex surface of the substrate while the sheet cladding opposite the concave surface of the substrate is spaced from the concave surface; b. placing the sheet cladding and substrate assembly into a sealed rubbery mold including: i. inserting the rubbery mold into a rubbery sleeve; ii. sealing each end of the rubbery sleeve with an end plate and clamp; and, c. applying isostatic pressure to the mold to deform the sheet cladding into contact with the substrate concave surface.
Claim 6
Dependent Claim
31 words
The method recited in claim 3 wherein the rough forming step further comprises joining one edge of the sheet cladding to the other edge at the convex surface of the substrate.
Claim 7
Dependent Claim
42 words
The method recited in claim 3 wherein the isostatic pressure is cold isostatic pressure exceeding the room temperature yield strength of the sheet cladding based on the thickness of the cladding multiplied by the height of the concave surface to be clad.
Claim 8
Independent Claim
150 words
A method of forming a sheet cladding to an airfoil substrate having a concave-convex surface, the method comprising the steps of: a. rough forming the sheet cladding to the substrate so that the sheet cladding closely abuts the concave surface including: i. fastening one edge of the sheet cladding to the convex surface of the substrate; ii. joining the other edge of the sheet cladding to the one edge of the sheet cladding to define a seam on the convex surface of the substrate; b. placing the sheet cladding and substrate assembly into a sealed rubbery mold; and, c. applying isostatic pressure to the mold and assembly to deform the sheet cladding to the substrate concave surface wherein the isostatic pressure exceeds the room temperature yield strength of the sheet cladding based on the thickness of the cladding sheet multiplied by the height of the concave surface to be clad.
Claim 9
Independent Claim
150 words
A method of forming a sheet cladding to an airfoil substrate having a concave-convex surface, the method comprising the steps of: a. rough forming the sheet cladding to the substrate so that the sheet cladding closely abuts the concave surface including: i. fastening one edge of the sheet cladding to the convex surface of the substrate; ii. joining the other edge of the sheet cladding to the one edge of the sheet cladding to define a seam on the convex surface of the substrate; b. placing the sheet cladding and substrate assembly into a sealed rubbery mold; and, c. applying isostatic pressure to the mold and assembly to deform the sheet cladding to the substrate concave surface wherein the isostatic pressure exceeds the room temperature yield strength of the sheet cladding based on the thickness of the cladding sheet multiplied by the height of the concave surface to be clad.
References Cited (Backward Citations)
US3433039A
Cited
US3707750A
Cited
US3668768A
Cited
US3699623A
Cited
US3827118A
Cited
US3699642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |