Invention Grant
- Patent Title: Method using a laser for welding between two metallic materials or for sintering of powder(s), application for making bipolar plates for PEM fuel cells
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Application No.: US16183070Application Date: 2018-11-07
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Publication No.: US11648625B2Publication Date: 2023-05-16
- Inventor: Ludovic Rouillon
- Applicant: Commissariat a l'Energie Atomique et aux Energies Alternatives
- Applicant Address: FR Paris
- Assignee: Commissariat a l'Energie Atomique et aux Energies Alternatives
- Current Assignee: Commissariat a l'Energie Atomique et aux Energies Alternatives
- Current Assignee Address: FR Paris
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: FR 60478 2017.11.08
- Main IPC: B23K26/211
- IPC: B23K26/211 ; H01M8/0232 ; H01M8/0245 ; B23K26/12 ; B23K26/34 ; H01M8/0256 ; B23K26/00 ; B23K26/21 ; H01M8/10 ; B23K101/34 ; B23K101/18 ; H01M8/1018
Abstract:
A method for welding between two metallic plates, including:
(a) fitting a solid plate without openings, configured to be transparent at at least one emission wavelength of a laser beam (F) emitted by a laser (L), between the laser (L) and at least one contact zone between the metallic plates to be welded;
(a1) inerting of the contact zone via a netural gas, where the neutral gas circulates in channels delimited by the contact zone between the metallic plates and by the solid plate;
(a2) exerting pressure on the two metallic plates to apply them against one another in the contact zone to be welded, where the application pressure is exerted by the solid plate directly in contact with one of the two metallic plates to be welded; and
(b) emission of a laser beam, through the solid plate, to perform welding of the metallic plates in the contact zone.
(a) fitting a solid plate without openings, configured to be transparent at at least one emission wavelength of a laser beam (F) emitted by a laser (L), between the laser (L) and at least one contact zone between the metallic plates to be welded;
(a1) inerting of the contact zone via a netural gas, where the neutral gas circulates in channels delimited by the contact zone between the metallic plates and by the solid plate;
(a2) exerting pressure on the two metallic plates to apply them against one another in the contact zone to be welded, where the application pressure is exerted by the solid plate directly in contact with one of the two metallic plates to be welded; and
(b) emission of a laser beam, through the solid plate, to perform welding of the metallic plates in the contact zone.
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