WO2016059937A1 - Procédé de traitement de tôle à l'aide de diodes laser directes et dispositif de traitement par diodes laser directes mettant en oeuvre le procédé - Google Patents

Procédé de traitement de tôle à l'aide de diodes laser directes et dispositif de traitement par diodes laser directes mettant en oeuvre le procédé Download PDF

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Publication number
WO2016059937A1
WO2016059937A1 PCT/JP2015/076458 JP2015076458W WO2016059937A1 WO 2016059937 A1 WO2016059937 A1 WO 2016059937A1 JP 2015076458 W JP2015076458 W JP 2015076458W WO 2016059937 A1 WO2016059937 A1 WO 2016059937A1
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sheet metal
laser light
wavelength
laser
processing
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PCT/JP2015/076458
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English (en)
Japanese (ja)
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宏明 石黒
明彦 杉山
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株式会社アマダホールディングス
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    • 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
    • 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

Definitions

  • the present invention relates to a sheet metal processing method using a direct diode laser beam and a direct diode laser processing apparatus for executing the method.
  • a laser processing apparatus for processing a sheet metal an apparatus using a carbon dioxide gas (CO 2 ) laser oscillator, a YAG laser oscillator, or a fiber laser oscillator as a laser light source is known.
  • CO 2 carbon dioxide gas
  • the fiber laser oscillator has advantages such as better light quality and extremely high oscillation efficiency than the YAG laser oscillator. For this reason, a fiber laser processing apparatus using a fiber laser oscillator is used for industrial purposes, particularly for sheet metal processing (cutting or welding).
  • DDL Direct Diode Laser
  • the DDL module superimposes multiple-wavelength laser light generated by a plurality of laser diodes (LD) and transmits it to the processing head using a transmission fiber. Then, the laser light emitted from the end face of the transmission fiber is condensed and irradiated on a workpiece (work) by a collimator lens, a condensing lens, or the like.
  • LD laser diodes
  • the focal point of the laser beam is positioned above the workpiece cutting position so that the cutting width is approximately one half of the workpiece plate thickness.
  • a cutting method for focusing is known (Patent Document 1).
  • Patent Document 1 suppression of dross generation has not been sufficient.
  • the present invention has been made in view of the above problems, and its purpose is to provide a sheet metal that has less dross adhesion and easily peels off the attached dross when performing sheet metal processing using multi-wavelength laser light. And a direct diode laser processing apparatus for executing the same.
  • the aspect of the present invention when oscillating multi-wavelength laser light from a DDL module, transmitting the oscillated multi-wavelength laser light, and cutting a sheet metal having a thickness of 2 mm or more, transmission is performed.
  • the collected multi-wavelength laser light is condensed using a condensing lens having a focal length f ⁇ 150 mm and a focal position Pf of ⁇ 2.0 mm ⁇ Pf ⁇ about 0.0 mm with respect to the upper surface of the sheet metal.
  • a sheet metal processing method is provided, which includes cutting and processing the sheet metal by irradiating the sheet metal with laser light from the DDL module.
  • the gas pressure of the assist gas supplied to the processing point is 1.5 MPa (megapascal) or more.
  • the laser light from the DDL module is composed of at least two or more multiple-wavelength laser lights, and the wavelength of any laser light is less than 1000 nm.
  • the wavelength (Wavelength) of the laser beam from the DDL module is configured to be a multiple-wavelength of 800 nm to 990 nm.
  • the BPP (Beam parameter product) of the laser light emitted from the DDL module is 7 mm * mrad or more and 20 mm * mrad or less.
  • the BPP (Beam parameter product) of the laser beam is 10.3 mm * mrad
  • the beam waist has a diameter of 150 ⁇ m or more and 370 ⁇ m or less.
  • the beam waist is not less than 300 ⁇ m and not more than 364 ⁇ m.
  • the focal lens has an incident diameter of 20 mm and a condensing diameter d of 300 ⁇ m to 364 ⁇ m.
  • the Rayleigh length of the laser beam is 1.5 mm or more and 6 mm or less.
  • the Rayleigh length of the laser beam is 2.2 mm or more and 3.4 mm or less.
  • the sheet metal is preferably an aluminum sheet metal.
  • the sheet metal preferably has a thickness of 100 mm or less.
  • the transmitted multi-wavelength laser light is condensed using a condensing lens having a focal length f ⁇ 120 mm and a focal position Pf of 0.0 mm ⁇ Pf ⁇ 2.0 mm with respect to the upper surface of the sheet metal.
  • a sheet metal processing method is provided, which includes cutting and processing the sheet metal by irradiating the sheet metal with laser light from the DDL module.
  • the gas pressure of the assist gas supplied to the processing point is 0.8 MPa to 1.5 MPa.
  • the laser light from the DDL module is composed of at least two or more multiple-wavelength laser lights, and the wavelength of any laser light is less than 1000 nm.
  • the wavelength (Wavelength) of the laser beam from the DDL module is configured to be a multiple-wavelength of 800 nm to 990 nm.
  • the BPP (Beam parameter product) of the laser light emitted from the DDL module is 7 mm * mrad or more and 20 mm * mrad or less.
  • the BPP (Beam parameter product) of the laser beam is 10.3 mm * mrad
  • the beam waist has a diameter of 150 ⁇ m or more and 370 ⁇ m or less.
  • the beam waist is not less than 300 ⁇ m and not more than 364 ⁇ m.
  • the focus lens has an incident diameter of 300 ⁇ m or more and 364 ⁇ m or less.
  • the Rayleigh length of the laser beam is 1.5 mm or more and 6 mm or less.
  • the Rayleigh length of the laser beam is 2.2 mm or more and 3.4 mm or less.
  • the sheet metal is preferably an aluminum sheet metal.
  • the transmitted multi-wavelength laser light is used with a condensing lens having a focal length f ⁇ 150 mm, and a focal position Pf arranged at ⁇ 2.0 mm ⁇ Pf ⁇ about 0.0 mm with respect to the upper surface of the sheet metal.
  • the transmitted multi-wavelength laser light is used.
  • the laser beam from the DDL module is collected using a condensing lens having a focal length f ⁇ 120 mm and a focal position Pf of 0.0 mm ⁇ Pf ⁇ 2.0 mm with respect to the upper surface of the sheet metal. Light on sheet metal And it is processed by cutting the sheet metal processing method of sheet metal made of is provided by.
  • the conditions described after the first side surface are preferably satisfied.
  • the first It is preferable that the conditions described after the second aspect are satisfied.
  • a DDL module that oscillates multi-wavelength laser light, a transmission fiber that transmits multi-wavelength laser light oscillated by the DDL module, and a sheet metal having a thickness of 2 mm or more are cut.
  • the multi-wavelength laser light transmitted by the transmission fiber has a focal length f ⁇ 150 mm, and the focal position Pf is set to ⁇ 2.0 mm ⁇ Pf ⁇ about 0.0 mm with respect to the upper surface of the sheet metal.
  • a direct diode laser processing apparatus comprising: a laser processing machine that condenses light using a condensing lens that is arranged and irradiates the metal plate with laser light from a DDL module to cut and process the metal plate.
  • a DDL module that oscillates multi-wavelength laser light, a transmission fiber that transmits multi-wavelength laser light oscillated by the DDL module, and a sheet metal thinner than 2 mm are cut.
  • the multi-wavelength laser light transmitted by the transmission fiber has a focal length f ⁇ 120 mm, and the focal position Pf is arranged at 0.0 mm ⁇ Pf ⁇ 2.0 mm with respect to the upper surface of the sheet metal.
  • a DDL module that oscillates multi-wavelength laser light, a transmission fiber that transmits multi-wavelength laser light oscillated by the DDL module, and a sheet metal having a thickness of 2 mm or more are cut.
  • the multi-wavelength laser light transmitted by the transmission fiber has a focal length f ⁇ 150 mm, and the focal position Pf is set to ⁇ 2.0 mm ⁇ Pf ⁇ about 0.0 mm with respect to the upper surface of the sheet metal.
  • the multi-wavelength laser light is condensed using a condensing lens having a focal length f ⁇ 120 mm and a focal position Pf arranged at 0.0 mm ⁇ Pf ⁇ 2.0 mm with respect to the upper surface of the sheet metal.
  • a laser processing machine for processing by cutting sheet metal with a laser beam from the DDL module by irradiating the sheet metal, the direct diode laser machining apparatus comprising a are provided.
  • the attached state of dross is small, and the attached dross is easy to peel off.
  • FIG. 2A is a side view showing an example of a laser oscillator according to the embodiment of the present invention.
  • FIG. 2B is a front view of the laser oscillator.
  • FIG. 1 shows an overall configuration of a DDL laser processing machine according to an embodiment of the present invention.
  • the DDL laser beam machine includes a laser oscillator 11 that oscillates a multi-wavelength laser beam LB, and a transmission fiber (process fiber) that transmits the laser beam LB oscillated by the laser oscillator 11. ) 12 and a laser processing machine (laser processing machine main body) 13 for condensing the laser beam LB transmitted by the transmission fiber 12 to a high energy density and irradiating the workpiece (work) W.
  • a laser oscillator 11 that oscillates a multi-wavelength laser beam LB
  • a transmission fiber that transmits the laser beam LB oscillated by the laser oscillator 11.
  • a laser processing machine laser processing machine main body 13 for condensing the laser beam LB transmitted by the transmission fiber 12 to a high energy density and irradiating the workpiece (work) W.
  • the laser beam machine 13 has a machining head 17 that irradiates the workpiece with the laser beam LB emitted from the transmission fiber 12.
  • the processing head 17 includes a collimator unit 14 that converts laser light from the fiber 12 into substantially parallel light by a collimator lens 15, and a laser light LB that has been converted to substantially parallel light, perpendicular to the X-axis and Y-axis directions.
  • a bend mirror 16 that reflects downward in the Z-axis direction, a condensing lens 18 that condenses the laser light LB reflected downward by the bend mirror 16, and a nozzle at the tip.
  • the collimator lens 15 and the condenser lens 18 for example, a general lens such as a quartz plano-convex lens can be used.
  • a lens driving unit that drives the collimator lens 15 in a direction parallel to the optical axis (X-axis direction) is installed in the collimator unit 14.
  • the laser processing machine further includes a control unit that controls the lens driving unit.
  • the laser processing machine 13 further includes a processing table 21 on which a workpiece (work) W is placed, a portal X-axis carriage 22 that moves in the X-axis direction on the processing table 21, and an X-axis carriage 22. And a Y-axis carriage 23 that moves in the Y-axis direction perpendicular to the X-axis direction.
  • the collimator lens 15 in the collimator unit 14, the bend mirror 16, and the condensing lens 18 in the processing head 17 are fixed to the Y-axis carriage 23 in a state where the optical axis has been adjusted in advance. Move in the axial direction. It is also possible to provide a Z-axis carriage that can move in the vertical direction with respect to the Y-axis carriage 23 and to provide the condenser lens 18 on the Z-axis carriage.
  • the laser processing machine irradiates the workpiece W with the laser beam LB having a predetermined condensing diameter which is condensed by the condenser lens 18 and also injects an assist gas coaxially to melt the melt. While removing, the X-axis carriage 22 and the Y-axis carriage 23 are moved. Thereby, the laser beam machine can cut the workpiece W.
  • the workpiece W include various materials such as stainless steel, mild steel, and aluminum.
  • the plate thickness of the workpiece W is, for example, about 0.1 mm to 100 mm.
  • the laser oscillator 11 includes a housing 60, the LD module 10 housed in the housing 60 and connected to the transmission fiber 12, and the housing 60.
  • a power supply unit 61 that is housed in the LD module 10 and supplies power to the LD module 10
  • a control module 62 that is housed in the housing 60 and controls the output of the LD module 10, and the like are provided.
  • An air conditioner 63 that adjusts the temperature and humidity in the housing 60 is installed outside the housing 60.
  • the LD module 10 superimposes and outputs laser beams having multiple wavelengths ( ⁇ 1, ⁇ 2, ⁇ 3,..., ⁇ n).
  • the LD module 10 includes a plurality of laser diodes (hereinafter referred to as “LD”) 3 1 , 3 2 , 3 3 ,... 3 n (n is an integer of 4 or more), and LD 3 1 , 3 2 , 3 3. , ⁇ ⁇ ⁇ 3 n to the fiber 4 1, 4 2, 4 3, is connected via a ⁇ ⁇ ⁇ 4 n, multiwavelength ⁇ 1, ⁇ 2, ⁇ 3, ⁇ , spectral beam combination to laser light of ⁇ n
  • a spectral beam combining unit 50 that performs (spectral beam combining) is provided.
  • the plurality of LD3 1 , 3 2 , 3 3 ,... 3 n various semiconductor lasers can be adopted, and the combination of types and numbers is not particularly limited, and is appropriately selected according to the purpose of sheet metal processing. Is possible.
  • the wavelengths ⁇ 1, ⁇ 2, ⁇ 3,..., ⁇ n of the LD3 1 , 3 2 , 3 3 ,... 3 n are selected, for example, to be less than 1000 nm, selected in the range of 800 nm to 990 nm, or 910 nm to 950 nm. In this embodiment, it is set to 910 nm to 950 nm.
  • the laser light of multiple wavelengths ⁇ 1, ⁇ 2, ⁇ 3,..., ⁇ n is controlled by group (block) management for each wavelength band, for example.
  • the output can be variably adjusted individually for each wavelength band.
  • the output of all the wavelength bands can be adjusted so that it may become the desired absorption rate to a workpiece
  • LD3 1 , 3 2 , 3 3 ,... 3 n are simultaneously operated, and an appropriate assist gas such as oxygen or nitrogen is blown near the focal position.
  • an appropriate assist gas such as oxygen or nitrogen is blown near the focal position.
  • the spectral beam combining unit 50 includes a fixing unit 51 that bundles and fixes the emission ends of the fibers 4 1 , 4 2 , 4 3 ,... 4 n to form a fiber array 4, and fibers 4 1 , 4 2 , 4 3. ,... 4 n Collimator lens 52 that collimates laser light from n , Diffraction grating 53 that diffracts multi-wavelength ⁇ 1, ⁇ 2, ⁇ 3,. And a condensing lens 54 that condenses the laser light from 53 and enters the transmission fiber 12.
  • the diffraction grating 53, between the condenser lens 54, LD units 3 1, 3 2, 3 3, partially reflective coupler forming a resonator together with a reflecting surface provided on ⁇ ⁇ ⁇ 3 n trailing portion 55 is provided.
  • the partial reflection coupler 55 is preferably disposed between the collimator lens 52 and the condenser lens 54.
  • the beam waist for each wavelength of the laser light of multiple wavelengths ⁇ 1, ⁇ 2, ⁇ 3,..., ⁇ n is, for example, 100 ⁇ m. It is about 400 ⁇ m, and these multiple diameters provide multifocality.
  • the beam waist is formed by an optical element having an incident diameter of the condenser lens 18 of about 2 mm to 20 mm and a focal length of 50 mm to 300 mm.
  • the plate thickness of the workpiece W is, for example, about 0.5 mm to 30 mm.
  • the output of the short wavelength side wavelength band is made larger than the long wavelength side output in the range where the incident angle is larger than 0 ° and smaller than 50 °.
  • the cutting speed of the workpiece W can be selected, for example, in the range of 60 m / min to 250 m / min.
  • This processing method is a method of cutting a sheet metal having a thickness of 2 mm or more, and has a focal length f ⁇ 150 mm, and the focal position Pf is defined as ⁇ 2.0 mm ⁇ Pf with respect to the upper surface of the sheet metal.
  • the sheet metal is irradiated with parallel laser light from a DDL module.
  • a sheet metal having a thickness of 2 mm or more can be cut at a high speed (for example, a speed of 3 m / min to 6 m / min), and dross that can be easily removed is generated on the cut surface. Only.
  • the sheet metal is preferably an aluminum sheet metal.
  • the laser light from the DDL module includes two or more multi-wavelength laser lights, and the wavelength of each laser light is less than 1000 nm.
  • the wavelength of the laser beam is more preferably 800 nm or more and 990 nm or less.
  • the laser beam emitted from the DDL module or the BPP (beam parameter product) of the laser beam is preferably 7 mm * mrad or more and 20 mm * mrad or less.
  • the BPP is 10.3 mm * mrad.
  • the beam waist (diameter) of the laser beam is preferably 150 ⁇ m or more and 370 ⁇ m or less.
  • the beam waist is not less than 300 ⁇ m and not more than 364 ⁇ m.
  • the Rayleigh length of the laser beam is preferably 1.5 mm or more and 6 mm or less, more preferably 2.2 mm or more and 3.4 mm or less.
  • a second embodiment of the sheet metal processing method is a method of processing a sheet metal having a thickness of less than 2 mm, having a focal distance f of 120 mm or less, and a focal position Pf on the upper surface of the sheet metal.
  • the sheet metal is irradiated with parallel laser light from the DDL module using a condenser lens set to 0.0 mm to 2.0 mm as a reference.
  • a sheet metal (aluminum) having a thickness of, for example, 1 mm can be cut at a high speed (for example, a speed of 14 m / min) without generating dross.
  • the gas pressure of the assist gas supplied to the processing point during the processing is preferably 0.8 MPa to 1.5 MPa, and more preferably 0.8 MPa to 1.2 MPa.
  • optical parameters such as the wavelength of the laser beam from the DDL module, BPP, Rayleigh length, and beam waist are the same as those in the first processing method.
  • the output of the laser oscillator is 2 kW
  • the incident angle of the laser beam to the aluminum plate as the workpiece (workpiece) is 70 °.
  • the multi-wavelength laser light a laser light having a wavelength of 910 mm to 950 nm was used.
  • the index of processing evaluation is such that the dross as shown in FIG. 7 does not occur, and the cut surface is uniform and melts down and does not dent or wavy. Determine.
  • “Dross” means that a substance melted by laser light at the time of cutting the material adheres as a molten material to the lower part of the material.
  • the cut surface is in a state as shown in FIGS.
  • FIG. 4 shows a case in which dross is generated during aluminum cutting, and the dross is easily peeled off by hand and the dross is insignificant (hereinafter referred to as “light dross” and indicated by symbol “ ⁇ ”).
  • FIG. 5 shows a case in which dross is generated during aluminum cutting, and this dross can be peeled off by hand, but can be easily peeled off by using a tool (hereinafter referred to as a normal dross symbol ⁇ ⁇ ).
  • FIG. 6 shows a state in which dross is generated during aluminum cutting, and this dross cannot be removed unless a tool is used (hereinafter referred to as heavy dross, indicated by symbol ⁇ ). In this case, it can be understood that the height of the dross is larger than those in FIGS.
  • Example 1 shows the test results of Example 1.
  • the thickness of the workpiece was 1.0 mm
  • the focal length of the collimator lens was 100 mm
  • the focal length of the condenser lens was 120 mm.
  • the assist gas was nitrogen (N2)
  • the pressure was 0.8 MPa
  • the nozzle was 2 mm in diameter
  • GP nozzle gap, which is the distance between the nozzle tip and the material
  • Example 1 light dross cutting was achieved when the focal point was set at a position 0.5 mm to 2.0 mm above the workpiece upper surface.
  • the workpiece could be cut at a speed of 14 m / min in a light dross state.
  • the upper limit of the focal position for realizing light dross cutting is 1.7% (2/120), preferably 0.8%, based on the focal length (120 mm) of the condenser lens. (1/120), and the lower limit is 0.0%.
  • the ⁇ mark means a light dross that can be easily peeled by hand, and the ⁇ ⁇ mark indicates a normal dross (which can be easily removed with a file such as a file) ) Signifies a heavy dross that must be scraped off, and a cross sign signifies that processing is impossible.
  • the aluminum plate having a thickness of 1 mm uses a condensing lens with a focal length of 120 mm, and the focal point is set to a position 0.5 mm to 2.0 mm above the workpiece upper surface, thereby 14 m / mm. It can be seen that light dross can be cut at a processing speed of a minute.
  • Example 2 shows the test results of Example 2.
  • the thickness of the aluminum plate as a workpiece was 2 mm
  • the focal length of the collimator lens was 100 mm
  • the focal length of the condenser lens was 150 mm.
  • the pressure of nitrogen as the assist gas was 1.2 MPa, and the nozzle diameter was 2 mm.
  • Example 2 light dross cutting was realized when the focus was set at a position of +0.5 mm to ⁇ 3.0 mm with respect to the upper surface of the workpiece.
  • the aluminum workpiece could be cut at a speed of 6 m / sec by setting the focal position to 0 mm to +0.5 mm with respect to the upper surface of the workpiece.
  • the upper limit of the focal position for realizing light dross cutting is 0.3% (0.5 / 150) based on the focal length (150 mm) of the condenser lens, and the lower limit is ⁇ 2.0% ( ⁇ 3/150), preferably ⁇ 1.3% ( ⁇ 2.0 / 150), more preferably ⁇ 0.7% ( ⁇ 1/150), and even more preferably 0. %.
  • the aluminum plate having a thickness of 2 mm uses a condensing lens with a focal length of 150 mm, and the focal point is set to a position 0.5 mm to 2.0 mm above the workpiece upper surface, thereby 14 m / mm. It can be seen that light dross can be cut at a processing speed of a minute. Note that 0.5 mm is 0.3% of the focal length of 150 mm, and the focal position can be expressed as 0.3% of the focal length of 150 mm.
  • FIG. 9 shows the test results of Example 3.
  • an aluminum workpiece having a thickness of 3 mm was processed using a collimator similar to the above and a condenser lens having a focal length of 150 mm.
  • the pressure of the assist gas (nitrogen) was 1.5 MPa, and the gas nozzle diameter was 2 mm.
  • light dross cutting could be realized by setting the focal position of the condenser lens to 0.0 mm to -1.5 mm with respect to the upper surface of the workpiece.
  • light dross cutting could be realized at a speed of 3 m / min by setting the focal position to -0.5 mm to -1.0 mm with respect to the upper surface of the workpiece.
  • the upper limit of the focal position for realizing light dross cutting is 0.0% (0.0 / 150) based on the focal length (150 mm) of the condenser lens, and more preferably ⁇
  • the lower limit is ⁇ 1.0% ( ⁇ 1.5 / 150), preferably ⁇ 0.7% ( ⁇ 1/150).
  • Comparative Example 1 FIG. 10 shows the test results of Comparative Example 1.
  • an aluminum material having a thickness of 2 mm is cut using a collimator similar to the above and a condensing lens having a focal length of 120 mm.
  • a condensing lens having a focal length of 150 mm is more desirable than a condensing lens having a focal length of 120 mm for cutting a workpiece having a thickness of 2 mm.
  • Comparative Example 2 When an aluminum material having a thickness of 2 mm was cut using a fiber laser and a condensing lens having a focal length of 150 mm, it was found that heavy dross was generated regardless of the selection of the focal position.
  • the DDL laser is superior to the fiber laser in terms of dross adhesion.

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

Abstract

Lors du traitement d'une tôle au moyen d'un laser à longueurs d'onde multiples, un procédé de traitement de tôle et un dispositif de traitement par diodes laser directes ont pour résultat une adhérence d'écume minimale et permettent de décoller facilement l'écume adhérente. Dans le procédé de traitement de tôle et le dispositif de traitement par diodes laser directes, lors de la découpe d'une tôle d'une épaisseur de 2 mm ou plus, un faisceau laser provenant d'un module de diodes laser directes (DDL) est émis sur la tôle, est condensé au moyen d'une lentille de condenseur qui présente une distance focale f ≥ 150 mm et est agencé, par rapport à la surface supérieure de la tôle, au niveau d'une position focale Pf avec -2,0 mm < Pf ≦ environ 0,0 mm. Lors de la découpe de la tôle d'une épaisseur inférieure à 2 mm, un faisceau laser provenant du module DDL est émis sur la tôle, est condensé au moyen d'une lentille de condenseur qui présente une distance focale f ≦ 120 mm et est agencé, par rapport à la surface supérieure de la tôle, au niveau d'une position focale Pf avec 0,0 mm < Pf ≦ 2,0 mm
PCT/JP2015/076458 2014-10-15 2015-09-17 Procédé de traitement de tôle à l'aide de diodes laser directes et dispositif de traitement par diodes laser directes mettant en oeuvre le procédé WO2016059937A1 (fr)

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JP2014211022A JP6043773B2 (ja) 2014-10-15 2014-10-15 ダイレクトダイオードレーザ光による板金の加工方法及びこれを実行するダイレクトダイオードレーザ加工装置

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017179642A1 (fr) * 2016-04-14 2017-10-19 株式会社アマダホールディングス Appareil d'usinage laser et procédé d'usinage laser
CN111163897A (zh) * 2017-10-06 2020-05-15 株式会社天田控股集团 镀敷钢板的激光切断加工方法、激光加工头、及激光加工装置
JPWO2021124581A1 (fr) * 2019-12-20 2021-06-24

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