US 12,280,449 B2
Method and apparatus for cutting and ablating a workpiece with a complex fluid-jet-guided laser beam
Florent Bruckert, Sciez-sur-Léman (FR); Gilles Soulier, Romont (CH); Grégoire Laporte, Prilly (CH); and Bernold Richerzhagen, Saint-Sulpice (CH)
Assigned to SYNOVA S.A., Duillier (CH)
Appl. No. 17/424,520
Filed by SYNOVA S.A., Duillier (CH)
PCT Filed Jan. 21, 2020, PCT No. PCT/EP2020/051361
§ 371(c)(1), (2) Date Jul. 21, 2021,
PCT Pub. No. WO2020/152136, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. 19152959 (EP), filed on Jan. 22, 2019.
Prior Publication US 2022/0134481 A1, May 5, 2022
Int. Cl. B23K 26/38 (2014.01); B23K 26/0622 (2014.01); B23K 26/146 (2014.01); B23K 26/352 (2014.01); B23K 103/04 (2006.01)
CPC B23K 26/38 (2013.01) [B23K 26/0622 (2015.10); B23K 26/146 (2015.10); B23K 26/3576 (2018.08); B23K 2103/04 (2018.08)] 16 Claims
OG exemplary drawing
 
1. A method (100) for cutting or ablating a particular material of a workpiece (310) with a pulsed laser beam (200), the method (100) comprising:
producing (101) the pulsed laser beam (200) with at least one laser source (301, 301a),
providing (102) a pressurized fluid jet (303) onto the workpiece (310), and
coupling (103) the pulsed laser beam (200) into the fluid jet (303) towards the workpiece (310),
wherein the pulsed laser beam (200) comprises at least two superimposed pulsations (201, 202) selected based on the particular material of the workpiece (310),
wherein a first pulsation (201) of the at least two superimposed pulsations (201, 202) has a different power and frequency than a second pulsation (202) of the at least two superimposed pulsations (201, 202),
wherein the first pulsation (201) is suitable to cut or ablate the particular material of the workpiece (310), and
the second pulsation (202) is suitable to smooth a surface (610) created by cutting or ablating the particular material with the first pulsation (201).