Patent US3916141A successfully refreshed from Google Patents.
US3916141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance welding of honeycomb panel edges
Assignee: McDonnell Douglas Corp
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Filing: 1973-12-03
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Granted: 1975-10-28
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Expires: 1993-12-03
Abstract
Abstract Honeycomb panel edges are crushed and resistance seam welded, then trimmed through the weld to provide a solid edging. The irregular panel edge surface due to crushed core material and voids of the cell structure, under high welding pressure, transfers an impression to the face of the copper electrode wheels which is removed as the wheels rotate during the welding operation.
Inventors
- 👤 Chester A Czohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:19
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/002; B23K11/0093
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
171 words
The method of providing a solid edging to a honeycomb panel consisting of a honeycomb core between face sheets, said method comprising the steps of: 1. crushing the edges of the face sheets together and crumpling the honeycomb core in between, 2. passing the face sheet edges and crumpled core between a pair of electrode wheels under a pressure of approximately 2,000 pounds, 3. passing said edges and core between said wheels a multiple of times at successively higher weld current settings to resistance seamweld said face sheet edges and crumpled core into a continuous solid weld nugget joining the face sheets together, and 4. trimming through the weld longitudinally to create the solid edging on the panel; wherein the crumpled core between the face sheets makes an impression on the faces of the electrode wheels, and wherein the impressions are continuously removed as the electrode wheels rotate in their welding operation with rotating abrasive wheels having faces compatible with the faces of the electrode wheels to maintain their desired configuration.
Claim 2
Independent Claim
171 words
The method of providing a solid edging to a honeycomb panel consisting of a honeycomb core between face sheets, said method comprising the steps of: 1. crushing the edges of the face sheets together and crumpling the honeycomb core in between, 2. passing the face sheet edges and crumpled core between a pair of electrode wheels under a pressure of approximately 2,000 pounds, 3. passing said edges and core between said wheels a multiple of times at successively higher weld current settings to resistance seamweld said face sheet edges and crumpled core into a continuous solid weld nugget joining the face sheets together, and 4. trimming through the weld longitudinally to create the solid edging on the panel; wherein the crumpled core between the face sheets makes an impression on the faces of the electrode wheels, and wherein the impressions are continuously removed as the electrode wheels rotate in their welding operation with rotating abrasive wheels having faces compatible with the faces of the electrode wheels to maintain their desired configuration.
Claim 3
Dependent Claim
21 words
passing the face sheet edges and crumpled core between a pair of electrode wheels under a pressure of approximately 2,000 pounds,
Claim 4
Dependent Claim
21 words
passing the face sheet edges and crumpled core between a pair of electrode wheels under a pressure of approximately 2,000 pounds,
Claim 5
Dependent Claim
33 words
The method of providing a solid edging as in claim 1 wherein said abrasive wheels have their faces dressed while in turn the abrasive wheels are dressing the faces of said electrode wheels.
Claim 6
Dependent Claim
40 words
passing said edges and core between said wheels a multiple of times at successively higher weld current settings to resistance seamweld said face sheet edges and crumpled core into a continuous solid weld nugget joining the face sheets together, and
Claim 7
Dependent Claim
40 words
passing said edges and core between said wheels a multiple of times at successively higher weld current settings to resistance seamweld said face sheet edges and crumpled core into a continuous solid weld nugget joining the face sheets together, and
Claim 8
Dependent Claim
66 words
trimming through the weld longitudinally to create the solid edging on the panel; wherein the crumpled core between the face sheets makes an impression on the faces of the electrode wheels, and wherein the impressions are continuously removed as the electrode wheels rotate in their welding operation with rotating abrasive wheels having faces compatible with the faces of the electrode wheels to maintain their desired configuration.
Claim 9
Dependent Claim
66 words
trimming through the weld longitudinally to create the solid edging on the panel; wherein the crumpled core between the face sheets makes an impression on the faces of the electrode wheels, and wherein the impressions are continuously removed as the electrode wheels rotate in their welding operation with rotating abrasive wheels having faces compatible with the faces of the electrode wheels to maintain their desired configuration.
References Cited (Backward Citations)
US2108795A
Cited
US3581046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |