US 11,928,401 B2
Laser machining simulation method, laser machining system having means for implementing the method, and computer program for implementing this method
David Bruneel, Sougne-Remouchamps (BE); Liliana Cangueiro, Leuven (BE); Paul-Etienne Martin, Bordeaux (FR); José-Antonio Ramos De Campos, Angleur (BE); and Axel Kupisiewicz, Neupré (BE)
Assigned to LASER ENGINEERING APPLICATIONS, Angleur (BE)
Appl. No. 16/964,161
Filed by LASER ENGINEERING APPLICATIONS, Angleur (BE)
PCT Filed Jan. 25, 2019, PCT No. PCT/EP2019/051916
§ 371(c)(1), (2) Date Jul. 22, 2020,
PCT Pub. No. WO2019/145515, PCT Pub. Date Aug. 1, 2019.
Claims priority of application No. 2018/5046 (BE), filed on Jan. 26, 2018.
Prior Publication US 2021/0034798 A1, Feb. 4, 2021
Int. Cl. G06F 30/20 (2020.01); B23K 26/06 (2014.01); B23K 26/0622 (2014.01); B23K 26/082 (2014.01); B23K 26/359 (2014.01); B23K 26/382 (2014.01); B23K 26/40 (2014.01); B23K 26/70 (2014.01); G05B 19/4155 (2006.01)
CPC G06F 30/20 (2020.01) [B23K 26/0624 (2015.10); B23K 26/0626 (2013.01); B23K 26/082 (2015.10); B23K 26/359 (2015.10); B23K 26/382 (2015.10); B23K 26/40 (2013.01); B23K 26/70 (2015.10); B23K 26/702 (2015.10); G05B 19/4155 (2013.01); G05B 2219/45165 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for simulating a laser machining of a material by a laser machining system capable of emitting a machining laser beam, said method comprising the following steps:
a) providing a central unit with:
information relating to the material to be machined comprising:
a delta δ relative to a penetration depth of the machining laser beam in the material,
a threshold fluence Fth relative to a minimum energy density of the laser beam allowing a machining,
an incubation coefficient S, between 0 and 1, relating to a dependence of the threshold fluence Fth on a number of pulses of the laser beam at a single point,
a complex refractive index n+ik,
information relating to said laser machining system comprising:
information relating to a polarization of said machining laser beam,
a pulse energy of said machining laser beam EP,
a diameter of said machining laser beam at a focal point w,
an order of a Gaussian p of said machining laser beam between 1 and 20,
a pulse repetition rate PRR of pulses n of the machining laser beam,
a wavelength of the machining laser beam;
b) performing with said central unit a simulation of a machining of said material to be machined with said laser machining system;
c) determining with said central unit on the basis of:
said information relating to interaction between the laser beam and the material to be machined, and,
said information relating to said laser machining system,
a machining profile in two or three dimensions corresponding to the simulation of a machining of said material to be machined with said laser machining system and laser machining parameters based on the simulation; and
d) configuring said laser machining system to machine said material with a laser source according to the laser machining parameters,
the method taking into account surface topography depth increasing of a surface of the material to be machined after each consecutive laser pulse.