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1. (CA2234895) METHOD AND APPARATUS FOR LASER CUTTING MATERIALS

Office : Canada
Application Number: 2234895 Application Date: 25.10.1996
Publication Number: 2234895 Publication Date: 01.05.1997
Publication Kind : A1
Prior PCT appl.: Application Number:PCTUS1996017226 ; Publication Number: Click to see the data
IPC:
B23K 26/04
B23K 26/0622
B23K 26/14
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
[IPC code unknown for B23K 26/0622]
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
Applicants: E.I. DU PONT DE NEMOURS AND COMPANY
Inventors:
Priority Data: 9511695.8 27.10.1995 EP
Title: (EN) METHOD AND APPARATUS FOR LASER CUTTING MATERIALS
(FR) PROCEDE ET APPAREIL DE DECOUPAGE D'OBJETS AU LASER
Abstract: front page image
(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.


Also published as:
EP0857098US6163010JPH11513935KR1019990067086WO/1997/015417