Patent ID: 11928401
Assignee: LASER ENGINEERING APPLICATIONS
Field: Machine tools (Mechanical engineering)
Classification: CPC G  B | IPC B  G

Claim 0:
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.