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1. (EP0857098) METHOD AND APPARATUS FOR LASER CUTTING MATERIALS

Office : European Patent Office
Application Number: 96937024 Application Date: 25.10.1996
Publication Number: 0857098 Publication Date: 12.08.1998
Publication Kind : A1
Designated States: AT, CH, FR, GB, LI
Prior PCT appl.: Application Number:US1996017226 ; Publication Number: Click to see the data
IPC:
B 23K
B 23K
B23K 26/04
B 23K
B23K 26/06
B23K 26/14
B23K 26/36
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
08
Devices involving relative movement between laser beam and workpiece
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
02
Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
04
Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
14
using a flow, e.g. a jet of gas, in conjunction with the laser beam
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
02
Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
06
Shaping the laser beam, e.g. by masks or multi-focusing
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
14
using a flow, e.g. a jet of gas, in conjunction with the laser beam
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
36
Removing material
CPC:
B23K 26/032
B23K 26/04
B23K 26/064
B23K 26/0648
B23K 26/0665
B23K 26/123
B23K 26/142
B23K 26/1462
B23K 26/364
Applicants: DU PONT
Inventors: KOBSA HENRY
Priority Data: 9617226 25.10.1996 US
Title: (DE) VERFAHREN UND VORRICHTUNG ZUM LASERSCHNEIDEN VON WERKSTOFFEN
(EN) METHOD AND APPARATUS FOR LASER CUTTING MATERIALS
(FR) PROCEDE ET APPAREIL DE DECOUPAGE D'OBJETS AU LASER
Abstract:
(EN) An improved method and apparatus of cutting an object with a laser beam, comprising using a diode laser-pumped pulsed solid state laser having an average power output from about 2 to about 100 watts and delivering an average laser beam brightness of greater than 1012 W/m2*sr and a peak brightness of greater than 1013 W/m2*sr to the object. Objects cut with the laser cutting method having heat affected zones (HAZ) of less than 4 mm, and having substantially no microcracks.
(FR) L'invention porte sur un procédé et un appareil de découpage d'objets au laser recourant à un laser solide pulsé à pompage par diode laser d'une puissance de sortie moyenne d'environ 2 à environ 100 W et dirigeant sur l'objet un faisceau d'une brillance moyenne supérieure à 1012 W/m2*sr et atteignant des pics de 1013 W/m2*sr. Les objets découpés par ce procédé présentent des zones affectées par la chaleur de moins de 4 mm et sont sensiblement exempts de microfissures.
Also published as:
US6163010JPH11513935CA2234895KR1019990067086WO/1997/015417