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EP3870386A1 - Procédé et dispositif de surveillance d'un processus de découpe - Google Patents

Procédé et dispositif de surveillance d'un processus de découpe

Info

Publication number
EP3870386A1
EP3870386A1 EP19801470.6A EP19801470A EP3870386A1 EP 3870386 A1 EP3870386 A1 EP 3870386A1 EP 19801470 A EP19801470 A EP 19801470A EP 3870386 A1 EP3870386 A1 EP 3870386A1
Authority
EP
European Patent Office
Prior art keywords
cutting
workpiece
cutting process
length
speed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19801470.6A
Other languages
German (de)
English (en)
Inventor
Steffen Kessler
David Schindhelm
Winfried Magg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trumpf Werkzeugmaschinen SE and Co KG
Original Assignee
Trumpf Werkzeugmaschinen SE and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Trumpf Werkzeugmaschinen SE and Co KG filed Critical Trumpf Werkzeugmaschinen SE and Co KG
Publication of EP3870386A1 publication Critical patent/EP3870386A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • B23K26/032—Observing, e.g. monitoring, the workpiece using optical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/0869—Devices involving movement of the laser head in at least one axial direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B23K26/0643—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising mirrors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B23K26/0648—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising lenses

Definitions

  • the present invention relates to a method for monitoring, in particular for regulating, a cutting process on a workpiece, comprising: focusing a machining beam, in particular a laser beam, onto the workpiece, detecting an area of the workpiece to be monitored, the one
  • the invention also relates to a device for monitoring, in particular for regulating, a cutting process on a workpiece, comprising: a focusing device for focusing a
  • Processing beam in particular a laser beam
  • an image capture device for capturing an area to be monitored on the workpiece, which includes an interaction area of the processing beam with the workpiece, and an evaluation device which is designed, based on the detected interaction area, at least one characteristic parameter of the cutting process , especially the kerf.
  • Laser cutting process which can be used to record characteristic parameters of a laser cutting process, for example an impending cut, has become known from WO 2012/107331 A1 by the applicant.
  • An impending cut is detected when the cut gap falls below a predetermined gap.
  • the area of the observed cutting front is compared with a reference area which corresponds to the area of the cutting front for a good cut or quality cut.
  • Cut-off can also be detected if the radiation intensity emitted by the reference surface exceeds a limit value for the target brightness for a normal cut.
  • WO 2012/107331 A1 also proposes a
  • the general cause of a cut-off is insufficient energy input into the workpiece.
  • the insufficient path energy leads to a flattening of the cutting front, i.e. to an increase in the cutting front angle, as a result of which the melt at the lower cutting edge can no longer be driven out completely and solidifies in the kerf.
  • the closure of the lower edge leads to
  • the cutting front angle which is a characteristic parameter of the cutting gap, is therefore an indicator of an impending cut.
  • Cutting nozzle is limited. Especially in flame cutting processes, small Nozzle diameter used, so that the cutting front lower edge even with a good cut outside the limited by the nozzle mouth
  • WO2015036140A1 proposes that the applicant draws conclusions as to the cutting front angle as a characteristic parameter of the cutting process from a brightness or intensity value, which is determined from an image of the interaction area recorded during slow observation at an angle to the beam axis of the laser beam pull. By comparing the intensity value with a threshold value, it can be concluded that a critical value of the cutting front angle is exceeded, at which there is no longer a good cut.
  • a cutting front wake is determined from the camera images and can be regulated to a specific setpoint.
  • the object of the invention is to provide a method and a device for monitoring, in particular for regulating, a cutting process, which reliably determine a characteristic parameter of the cutting process
  • Enable cutting process in particular a characteristic parameter of a kerf formed in the cutting process, and / or an advantageous control of the cutting process.
  • this object is achieved by a method of the type mentioned at the outset, which is characterized in that in one
  • a cutting front length of a cutting front formed on the kerf is determined.
  • the inventors have recognized that a determination of the cutting front length as
  • Control variable for the melt cutting process is possible by detecting the length of a lighting phenomenon from the process zone or the interaction area of the machining beam with the workpiece. Typically, a thermal image of the area to be monitored or the
  • Melt cutting process e.g. recorded or observed at wavelengths in the NIR / IR wavelength range, but it may also be an observation at others
  • Wavelengths possible e.g. in the UV wavelength range.
  • the area to be monitored is detected by means of an observation beam path that runs essentially coaxially with a beam axis of the processing beam.
  • An essentially coaxial observation beam path is understood to mean that the observation beam path is coaxial or parallel to the beam axis or at a (small) angle to the
  • Beam axis of the machining beam is less than 5 °. It has been shown that the detection of the light phenomenon by means of an observation beam path that runs essentially coaxially to the beam axis of the processing beam is easier to implement in terms of system technology by means of coaxial camera-based process observation than an off-axis arrangement of a spatially resolving detector, for example a camera.
  • the area to be monitored is preferably acquired by a
  • Nozzle opening of a machining nozzle for the passage of the machining beam onto the workpiece is shown by an imaging sensor system with a vertical or quasi-vertical ( ⁇ 5 ° angle to the beam axis of the processing beam or the laser beam) through the processing nozzle Process lights shown, their length measured and the (target) length of the cutting process can be regulated if necessary (see below).
  • a nozzle opening of the processing nozzle, through which a cutting gas jet emerges from the processing nozzle has a maximum extension of at least 7 mm, preferably between 7 mm and 12 mm.
  • Machining nozzle with a comparatively large nozzle opening is advantageous for controlled process control of the melt cutting process, as will be described in more detail below.
  • the maximum extension is understood to mean the diameter of the nozzle opening. In the case of another cross-sectional geometry of the nozzle, the maximum extension means the longest nozzle axis of the nozzle opening. In the case of a nozzle opening with an elliptical cross section, the maximum extension is involved
  • the maximum extension of the nozzle opening is measured on the side of the nozzle facing the workpiece.
  • the fusion cutting process is carried out with a
  • Cutting gas pressure of less than 10 bar, preferably of more than 1 bar and less than 10 bar, particularly preferably of at least 2 bar and less than 6 bar.
  • the cutting gas emerges together with the machining jet from the nozzle opening of the machining nozzle and points out when it exits
  • the cutting gas used for the melt cutting process is mostly an inert gas, for example nitrogen, but it is also, for example
  • Gas mixtures with a certain oxygen content can be used.
  • melt cutting process is carried out at one
  • Cutting speed carried out which is at least 80%, preferably at least 90% of a cutting tear-off speed.
  • the cutting speed of the fusion cutting process is therefore less than 20%, preferably less than 10%, below the cutting-off speed.
  • the cut quality remains good up to the cut-off limit, so that cutting speeds can be made close to the cut-off limit.
  • the cut-off speed i.e. the speed at which it becomes one
  • Workpiece thicknesses and laser powers can be determined beforehand in series of measurements (experimental).
  • the cutting front length is from an image of the
  • the brightness of the lighting phenomenon in the image is thus greater than the brightness threshold.
  • Intensity threshold can be set, for example, relative to a reference value of the brightness or intensity in the image.
  • a maximum intensity value within the image for example, can serve as a reference value to which the respectively measured intensity is related or calibrated.
  • the image capturing device can be calibrated in a reference cutting process with reference cutting parameters and / or by comparing the intensity measurement values with those of a reference image capturing device.
  • the profile cut, the length of which is used to determine the cutting front length usually runs centrally in the kerf.
  • the method comprises: regulating the cutting front length to a predetermined target length by influencing at least one
  • regulation to a predetermined target length means that regulation takes place to a constant target length or that the predetermined target length is prevented from being exceeded, i.e. the regulation prevents the target length from being exceeded.
  • the inventors have found that the cutting front length is for one
  • Control is particularly suitable for cutting speeds close to the cutting speed: In the previous standard processes for
  • the cutting speeds are about 20-40% below the feed rates that are achieved under the conditions specified above with regard to the cutting gas pressure and the diameter of the nozzle opening.
  • control parameters are used to regulate the
  • Cutting front length influences the cutting speed between the machining beam and the workpiece (feed) and / or the performance of the machining beam.
  • the increase in the cutting front length with increasing feed becomes more pronounced with increasing feed, so that a feed control (and accordingly also a control of the power of the machining beam)
  • the cutting speed (feed speed) and / or the laser power as a good control variable using the feed speed and / or the power of the processing beam as a manipulated variable (s) or as a control parameter.
  • a change in the cutting speed can easily be prevented by changing the feed rate or the laser power, i.e. the fusion cutting process can be carried out quickly enough with a sufficient distance from the cut, which ensures the robustness of the process under interference.
  • a further aspect of the invention relates to a device of the type mentioned at the outset, in which the evaluation device is designed or programmed / configured to determine a cutting front length of a cutting front formed on the kerf as a characteristic parameter on the basis of the detected interaction area.
  • the evaluation device can display an image of the
  • monitoring area which contains the interaction area and which e.g. evaluated through a nozzle opening of a processing nozzle, in order to determine the length of a lighting phenomenon in the cutting direction, which corresponds to the cutting front length.
  • the device comprises a regulating device for regulating the cutting front length to a predetermined nominal length
  • Control parameters influence the energy input into the workpiece.
  • the process can be regulated in particular by changing the cutting speed and / or the laser power, in such a way that the cutting front length determined by the evaluation device corresponds to the target length or does not exceed the target length.
  • the control device is designed or
  • the cutting front length can be regulated to the desired length using the cutting speed as a control parameter, provided the cutting front length changes sufficiently as a function of the cutting speed, which is particularly the case at high cutting speeds just below the cutting speed .
  • Fig. 1 is a schematic representation of an embodiment of a
  • Image of a region of the workpiece to be monitored on the basis of which a cutting front length as a characteristic parameter of the
  • Fig. 3 shows the cutting front length depending on the ratio of
  • FIG. 1 shows an exemplary structure of a device 1 for process monitoring and control of a laser fusion cutting process on a plate-shaped workpiece 2 by means of a laser processing system, of which only one processing unit 3 (part of a laser processing head) with a focusing lens 4 is shown in FIG. 1 Focusing a C02, solid or diode laser beam 5 of the laser processing system, a processing nozzle 6 and with one
  • Deflecting mirror 7 is shown.
  • the deflecting mirror 7 is partially permeable and therefore forms an entry-side component of the
  • Process monitoring device 1 The device 1 for process monitoring, like the processing unit 3, is part of the laser processing head.
  • the deflecting mirror 7 reflects the incident laser beam 5 and transmits the process radiation relevant for the process monitoring, reflected by the workpiece 2 and emitted by the interaction zone in a wavelength range which in the present example lies between approx. 550 nm and 2000 nm.
  • Perforated mirrors can be used to control the process radiation
  • Perforated mirror usually leads to diffraction effects of the process radiation as well as to a strong influence on the laser radiation.
  • Deflecting mirror 9 is arranged, which deflects the process radiation onto a geometrically high-resolution camera 10 as an image acquisition unit.
  • the camera 10 can be a high-speed camera that is coaxial with the
  • Laser beam axis 11 or for the extension 11a of the laser beam axis 11 is arranged independent of direction. The same goes for
  • Observation beam path 8 in the example shown coaxial to the laser beam axis 11 or to its extension 11 a.
  • the camera 10 in the incident light method, ie in the VIS wavelength range, possibly also in the NIR wavelength range, if an additional one Illumination source 15 is provided, which radiates in the NIR region and illuminates radiation 17 coaxially via a further partially transparent mirror 16
  • Laser beam axis 11 is coupled into the beam path.
  • Illumination source 15 can be provided with laser diodes, for example with a wavelength of 658 nm, or diode lasers, for example with a wavelength of 808 nm, which, as shown in FIG. 1, can be arranged coaxially, but also off-axis to the laser beam axis 11. Alternatively, it is the inclusion of the
  • an imaging, focusing optical system 12 shown in FIG. 1 as a lens which focuses the radiation relevant for process monitoring onto the camera 10.
  • An aspherical design of the imaging optical system or lens 12 for focusing can prevent or at least reduce spherical aberrations in the imaging.
  • a filter 13 in front of the camera 10 is advantageous if further radiation or wavelength components are to be excluded from the detection with the camera 10.
  • the filter 13 can e.g. be designed as a narrow-band bandpass filter with a small half-width, um
  • Element 12 and / or the filter 13 along the laser beam axis 11 can be adjusted and, if necessary, changed by means of a positioning system known to the person skilled in the art, represented for simplicity by a double arrow.
  • the camera 10 is in the present example without the additional
  • Illumination source 15 operated, i.e. the inherent lighting of the process zone in the NIR / IR wavelength range is detected. As shown in Fig. 2, the
  • Camera 10 has a high-resolution image 20 on its sensor surface 10a
  • the image 20 is shown by the circular inner contour of the nozzle opening 6a (see FIG. 1) of the nozzle 6 limited, whose diameter D or its maximum extent on
  • outlet end of the nozzle 6 in the example shown is between 7 mm and 12 mm.
  • the cutting process shown in FIG. 1 is a
  • the nozzle 6 can also be used as
  • Ring flow nozzle can be formed with two (usually concentric) nozzle openings: The laser beam 5 then emerges through the opening of the inner nozzle and the cutting gas jet 14 through the outer nozzle opening or through the inner and outer nozzle opening.
  • the outer nozzle opening has one
  • the image of camera 10 is taken through the inner nozzle opening, so that image 20 is delimited by the circular inner contour of the inner nozzle opening, which has a diameter of, for example, 3 mm.
  • An evaluation device 18 shown in FIG. 1 is used to evaluate the image 20 and in particular to detect an interaction area 22 within the area 21 of the workpiece 2 to be monitored.
  • the evaluation device 18 is in signaling mode with a control device 19 also shown in FIG. 1
  • Characteristic parameter of the laser cutting process which is a cutting front length L of a cutting front 23 (see FIG. 1) formed during cutting machining, against which a kerf 24 is opposed to a feed or cutting direction (i.e. in the negative X direction) connects.
  • the cutting front length L is measured between a point P1 at the front end of the interaction region 22 and a point P2 at the rear end of the interaction region 22 along the feed or cutting direction, along which the laser beam 5 with a cutting or feed speed V (see FIG. 1) is guided over the workpiece 2.
  • the feed direction corresponds to the X direction.
  • the image acquisition device 10 can be used to take a quick image during the cutting process, for example at a frequency of 100-1000 Hz.
  • the individual images 20 are e.g. evaluated by a threshold method, i.e. a respective image 20 is binarized by comparing the intensity values of the recorded lighting phenomenon at the individual pixels with a threshold value.
  • the length of the light in the cutting direction (X direction) which corresponds to the cutting front length L, is determined from the binarized image 20.
  • the cutting front length L can therefore be seen in Figure 20 e.g. about brightness threshold values ls one in
  • Cutting direction (X direction) of the profile section 25 of the lighting phenomenon can be determined, i.e. the cutting front length can be determined as the length L between two points P1, P2 of the profile section 25, at which a predetermined brightness threshold value ls or predetermined brightness threshold values are undershot. Calibration of the measured values of the intensity I to a reference value within the image 20, for example to a maximum, can take place
  • the image acquisition device 10 can be calibrated in a reference cutting process using reference cutting parameters and by comparing the measured values with those of a reference image acquisition device.
  • the diameter D of the machining nozzle 6 and the cutting speed V are the laser power P of the laser beam 5 or the laser source (not shown), the material of the workpiece 2 and the thickness d of the plate-shaped workpiece between an upper side 2a and an underside 2b of the workpiece 2.
  • melt cutting process described above can be carried out, for example, with the following process parameters:
  • Cutting speeds V are carried out which are at least 80%, preferably at least 90%, of a cutting-off speed Vs.
  • Cutting-off speed Vs can be determined in advance for a respective workpiece material, a respective workpiece thickness d, a predetermined laser power P and a predetermined cutting gas pressure ps.
  • the corresponding values for the cutting tear speed Vs can be determined in advance for a respective workpiece material, a respective workpiece thickness d, a predetermined laser power P and a predetermined cutting gas pressure ps. The corresponding values for the cutting tear speed Vs can
  • Cutting speeds V are performed.
  • the cutting front length L increases greatly, so that it is favorable to regulate the cutting front length L to a predetermined, constant desired length Ls with the aid of the control device 19.
  • the control device 19 influenced or changed the control device 19 at least one control parameter of the cutting process, which influences the energy input into the workpiece 2.
  • FIG. 3 shows the dependence of the cutting front length L determined with the aid of the evaluation device 18 on the cutting speed V, more precisely on the
  • Ratio of the cutting speed V to the cutting speed Vs for the example of structural steel with a thickness d of the workpiece 2 of 8 mm.
  • the increase in the cutting front length L increases with increasing
  • Cutting front length L is possible with the aid of the cutting speed V or the feed as a setting parameter at high cutting speeds V, which are typically more than 80% or more than 90% of the cutting-off speed Vs.
  • the target length Ls of the cutting front length L is approximately 0.6 mm, which is a ratio of the cutting speed V to
  • Cut-off speed Vs of approx. 95% corresponds.
  • a regulation of the cutting front length L to a predetermined target length Ls can alternatively or additionally also be carried out with the aid of the laser power P of the laser beam 5 as control parameters.
  • the fusion cutting process can be carried out at a sufficient distance from the cut-off, which ensures the robustness of the fusion cutting process under interference.
  • Feed adjustment AV (change in cutting speed V) take place at regular intervals (e.g. 200 Hz).
  • the feed adjustment AV can, for example, from the current feed V, which is stored in the control device 19 or in the evaluation device 18, the target length Ls, the difference D L between the one currently measured by the evaluation device 18
  • the control of the cutting front length L to the target length Ls can be carried out using the individual images if this is slow enough (e.g. with a cycle of 200 Hz), so that good control behavior is obtained without overshoot.
  • Averaging of the individual images 20 recorded by means of the image capture device 10 can be carried out by the image processing, i.e. make the determination of the cutting front length L more robust. For the averaging, for example, a sliding, possibly
  • weighted average can be determined.
  • the averaging can take place by a current image and the last average value image with a predetermined one
  • the fusion cutting process can be performed near the cut-off speed Vs, i.e. the feed range up to the cut-off speed Vs can be used almost completely without the quality of the cut edges of the cut line 24 deteriorating or without cutting cut-off occurring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

L'invention concerne un procédé de surveillance, en particulier de régulation, d'un processus de découpe sur une pièce. Le procédé comprend les étapes consistant à : concentrer un rayon d'usinage, en particulier un rayon laser, sur la pièce ; détecter une zone (21) à surveiller de la pièce, qui comprend une zone d'interaction (22) du rayon d'usinage ; et déterminer au moins une grandeur caractéristique (L) typique du processus de découpe, en particulier un joint de coupe (24) obtenu lors du processus de découpe à l'aide de la zone d'interaction (22) détectée. Selon l'invention, une longueur avant de découpe (L) d'une partie avant de découpe obtenue sur le joint de coupe (24) est déterminée dans un processus de découpe par fusion à l'aide de la zone d'interaction (22) détectée en tant que grandeur caractéristique typique. L'invention concerne également un dispositif associé de surveillance, en particulier de régulation, d'un processus de découpe sur une pièce (2).
EP19801470.6A 2018-10-22 2019-10-22 Procédé et dispositif de surveillance d'un processus de découpe Pending EP3870386A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018218006.7A DE102018218006A1 (de) 2018-10-22 2018-10-22 Verfahren und Vorrichtung zur Überwachung eines Schneidprozesses
PCT/EP2019/078679 WO2020083884A1 (fr) 2018-10-22 2019-10-22 Procédé et dispositif de surveillance d'un processus de découpe

Publications (1)

Publication Number Publication Date
EP3870386A1 true EP3870386A1 (fr) 2021-09-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19801470.6A Pending EP3870386A1 (fr) 2018-10-22 2019-10-22 Procédé et dispositif de surveillance d'un processus de découpe

Country Status (6)

Country Link
US (1) US20210387280A1 (fr)
EP (1) EP3870386A1 (fr)
JP (1) JP2022517169A (fr)
CN (1) CN112912199B (fr)
DE (1) DE102018218006A1 (fr)
WO (1) WO2020083884A1 (fr)

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DE102022121341A1 (de) 2022-08-24 2024-02-29 TRUMPF Werkzeugmaschinen SE + Co. KG Laserschneiden eines Werkstücks unter Schutz der Bearbeitungsvorrichtung
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JP2022517169A (ja) 2022-03-07
US20210387280A1 (en) 2021-12-16
WO2020083884A1 (fr) 2020-04-30
DE102018218006A1 (de) 2020-04-23
CN112912199B (zh) 2023-06-27

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