EP3887087A1 - Vorrichtung und verfahren zur strahlformung und strahlmodulation bei einer lasermaterialbearbeitung - Google Patents
Vorrichtung und verfahren zur strahlformung und strahlmodulation bei einer lasermaterialbearbeitungInfo
- Publication number
- EP3887087A1 EP3887087A1 EP19809449.2A EP19809449A EP3887087A1 EP 3887087 A1 EP3887087 A1 EP 3887087A1 EP 19809449 A EP19809449 A EP 19809449A EP 3887087 A1 EP3887087 A1 EP 3887087A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laser beam
- laser
- optical deflection
- optical
- deflection element
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000007493 shaping process Methods 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 title claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims abstract description 44
- 238000009826 distribution Methods 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims description 20
- 238000003466 welding Methods 0.000 claims description 7
- 238000003698 laser cutting Methods 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 description 16
- 238000005520 cutting process Methods 0.000 description 15
- 238000003754 machining Methods 0.000 description 8
- 230000006978 adaptation Effects 0.000 description 5
- 230000003993 interaction Effects 0.000 description 5
- 230000005855 radiation Effects 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000003534 oscillatory effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
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
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
-
- 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
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
- B23K26/046—Automatically focusing the laser beam
-
- 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
-
- 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
-
- 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
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/242—Fillet welding, i.e. involving a weld of substantially triangular cross section joining two parts
-
- 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
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/26—Seam welding of rectilinear seams
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/101—Scanning systems with both horizontal and vertical deflecting means, e.g. raster or XY scanners
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/105—Scanning systems with one or more pivoting mirrors or galvano-mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/0977—Reflective elements
- G02B27/0983—Reflective elements being curved
Definitions
- the present invention relates to a device and a method for beam shaping and beam modulation in laser material processing.
- Processes for laser material processing ideally require a three-dimensional distribution of a laser power density at an effective point that is adapted to a particular process in order to achieve optimum processing results with regard to quality and process efficiency. In conventional processes with static beam geometries, however, this is usually not the case.
- the present invention is therefore based on the object to provide a Vorrich device and a method with which the disadvantages mentioned are avoided, i. H. with which laser material processing can be carried out with the greatest possible flexibility.
- a device for beam shaping and beam movement in a laser material processing has a laser beam source for continuously emitting a laser beam, a beam shaping element, an optical deflection element and a focusing element arranged between the optical deflection element and a workpiece surface to be processed.
- the optical order is designed to shift a point of incidence of the laser beam on the workpiece surface.
- the beam shaping element is designed to change a position of a focal plane of the laser beam relative to the workpiece surface by means of a translational movement, and / or is designed to change an intensity distribution or lateral energy distribution within a beam cross section of the laser beam.
- the beam shaping element and the optical deflection element By using the beam shaping element and the optical deflection element, a three-dimensional adjustment or spatial positioning of the focused laser beam or the lateral energy distribution within the beam cross section with respect to the workpiece to be machined is made possible.
- the deflection element makes it possible to influence an integral of the beam intensity and a local interaction time.
- By deflecting the incident laser beam through the optical deflecting element in such a way that the point of impact can be varied a defined two-dimensional sional energy density distribution in the form of any Lissajous figures can be achieved on the workpiece surface.
- the position of the focal plane in the beam propagation direction can additionally be changed by a simple translational relative movement of the beam shaping element, so that an energy distribution in the form of any three-dimensional Lissajous figure can be defined.
- An extended translational relative movement of the beam shaping element furthermore makes it possible to adapt the intensity distribution over the beam cross section as desired within the three-dimensional Lissajous figure.
- the beam shaping element is positioned in a translationally application-related manner, while all other components of the device remain stationary or spatially fixed.
- the optical deflection element can be designed to be rotatable about two mutually perpendicular axes in order to achieve a simple change in the point of impact of the laser beam on the workpiece surface.
- At least one of the axes about which the optical deflection element can be rotated is collinear with the laser beam. This results in a simple geometric structure that contributes to a defined adjustability.
- the optical deflection element typically has one or two elements reflecting the laser beam, preferably mirrors, in order to enable a defined scanning.
- Each of the elements reflecting the laser beam can be rotatable about one of the two mutually perpendicular axes.
- each of the elements reflecting the laser beam can also be designed to be translationally movable and / or deformable in at least two spatial directions.
- the beam shaping element is typically linearly movable or deformable along an axis, this axis being tilted relative to the optical axis of the incident laser beam and the optical axis of the deflected laser beam.
- the tilt is preferably between 35 ° and 55 °, particularly preferably 45 °.
- the beam shaping element which as a rule also has an element reflecting the laser beam, such as a mirror, is also tilted by the aforementioned angle with respect to the workpiece surface to be processed.
- a continuously emitted laser beam is directed from a laser beam source via a beam shaping element, an optical deflection element and an optical focusing element arranged between the optical deflection element and a workpiece surface to be processed.
- a point of impact of the laser beam on the workpiece surface is shifted ben by the optical deflecting element and a position of a focal plane of the laser beam relative to the workpiece surface is changed by a translational movement of the beam shaping element and / or it is changed by the beam shaping element, for example by a translational Movement changes an intensity distribution within the beam cross-section.
- the beam shaping element and / or the optical deflection element who typically moves the oscillating by a control unit in a frequency range between 1 Hz and 100 kHz to set desired three-dimensional Lissajous figures.
- Said control unit can generally be set up for the control or regulation of the described method or the described device.
- the laser power can be modulated by the control unit in a frequency range between 1 Hz and 10 MHz, so that time-varying intensity densities can be generated.
- the method described is typically a laser cutting method or a laser welding method.
- a beam diameter of the laser beam is oscillated at a frequency between 1 Hz and 100 kHz, that is to say it is periodically enlarged and reduced. It can also be provided that a beam waist diameter of the laser beam is oscillated in a range between 0.5-d F and 2-d F of a fixed nominal beam waist diameter.
- the nominal beam waist diameter can be determined application-specifically and in particular can be between 100 pm and 200 pm.
- the machining properties can be set as desired by periodically increasing and decreasing the beam diameter.
- the beam diameter is typically identical to the beam waist diameter with regard to its size on a laser beam cross section of minimal diameter.
- the described method can be carried out with the described device, i. H. the device described is designed to carry out the method described.
- Fig. 1 is a schematic perspective view of a device for
- Fig. 2 is a schematic side view of the device
- FIG. 3 shows a view corresponding to FIG. 2 of an alternative embodiment of the beam path shown in FIG. 2.
- FIG. 1 shows a device for beam shaping or beam movement in a schematic perspective view.
- a laser beam source 1 in the present case a cw laser beam source, that is a laser beam source emitting a continuous, non-pulsed beam, emits a laser beam 2, which can be emitted in the electromagnetic wavelength range of visible radiation, infrared radiation or ultraviolet radiation.
- the laser beam 2 is deflected by a movable mirror as a beam forming element 3 in the illustrated embodiment by 90 ° by reflection in the direction of an optical deflecting element 4th
- the optical deflection element 4 can be rotated about two mutually perpendicular axes and, in the exemplary embodiment shown, is also a mirror. In further exemplary embodiments, however, the optical deflection element 4 can also be constructed from two mirrors.
- the optical deflection element 4 deflects the laser beam 2 in the direction of a workpiece surface 7 to be machined.
- a focusing element 5 in the exemplary embodiment shown a spherical or aspherical lens, is arranged in a housing 6 through which the laser beam 2 is focused on the workpiece surface 7 to be machined.
- the laser beam source 1 and the movements of the beam shaping element 3 and the optical deflecting element 4 are controlled by a control / regulating unit 8, which is in electrical or electronic connection with the elements mentioned.
- the optical deflection element 4 can thus cause the laser beam 2 to move on the workpiece surface 7 in the xy direction, as shown enlarged in the right part of FIG. 1. At least one of the axes around which the movement takes place is parallel or collinear to the incident laser beam 2.
- a translational movement of the beam-shaping element 3 along the axis indicated by arrows in FIG. 1 can position a focal plane or focal plane relative to the workpiece surface 7 can be changed so that an adjustment along a z-axis, which is also shown in the right part of FIG. 1, is made possible.
- This axis along which typically a periodic movement of the beam shaping element 3 takes place, is tilted in the exemplary embodiment shown in FIG. 1 by 45 ° in each case with respect to the incident and the reflected laser beam 2, and is therefore parallel to a surface normal of the mirror.
- the Beamformungsele element 3 is used in the illustrated embodiment, only an adjustment of the z-axis.
- the control unit 8 can vary a laser power of the laser beam 2. This is usually done oscillating at a frequency between 1 Hz and 10 MHz.
- the laser beam 2 is emitted by the laser beam source 1 but with a laser power of 5 kW to 20 kW.
- control unit 8 controls the movement of the laser beam 2 on the workpiece surface 7 in at least one of the axes, ie the x-axis, the y-axis and / or the z-axis, with a frequency between 1 Hz and 100 kHz modulated oscillating.
- the workpiece is fed parallel to the x-axis.
- the feed direction can of course also be directed differently.
- the laser beam 2 formed and focused with the aid of the beam shaping element 3 and the optical deflecting element 4 can be practically independent of one another in all three spatial directions in a frequency range dependent on a particular application with amplitudes between 0.01c / F to 2c / Z (where c / F the diameter of the beam waist (focal plane) of the oscillating beam and c / Z the characteristic dimension (i.e. length, width and / or depth of a processing zone).
- an effective volume of the laser beam 2 is positioned in an oscillatory manner in terms of time and space in a manner adapted to the machining process, and thus the effective range is adapted to a special machining process, with the possible inclusion of additional parameters for process control, in order to distribute almost any three-dimensional, time-varying power density distribution along a machining contour and in interaction with time-varying boundary conditions of the process zone.
- the beam power is typically modulated as a function of the current feed of the addressed component of the oscillation movement.
- This oscillating movement of the effective volume of the laser beam 2 can be technically achieved by a mechanical, electromechanical or adaptive beam shaping element 3 and / or a mechanical, electromechanical, electrostatic or piezo-driven optical deflection element 4.
- the oscillating movement in the machining direction x and transversely to the machining direction y either with the aid of two galvanometer-driven scanner mirrors or with the aid of a single mirror movable in two directions of rotation
- the individual mirror can be a MEMS mirror (micro electro-mechanical system).
- the beam shaping element 3 can be designed as an adaptive mirror, that is, as a further optical deflection element, which can change a surface shape from planar to convex and / or concave pneumatically, electrostatically, electromechanically or piezo-driven, and thus the beam profile and the beam path influenced.
- polygon wheels for the beam deflection in the case of special preferred directions of a special process.
- the oscillation movement in the z direction can take place, for example, by means of piezo-driven adaptive deflection mirrors.
- two-dimensional beam shaping in the x and z direction or in the y and z direction is also permitted by zeroing the oscillation amplitude and / or frequency of the remaining directional component.
- the x-z oscillation allows the angle of the cutting front to be adjusted and adjusted at any time during the cutting process. This enables optimum absorption ratios to be achieved, which can increase process efficiency.
- the y-z oscillation allows the cutting gap width to be set in a range of O.Olö ⁇ b ⁇ 0.2 b (sheet thickness b) depending on the sheet thickness and can be changed at any time during the cutting process.
- Adjust and change the cutting front with the simultaneous possibility of an adjustable or variable cutting gap width. This makes it possible to generate an optimal interaction surface for the oxidation reaction in the case of flame cutting. In the case of fusion cutting, the expulsion of the molten material in interaction with the cutting gas is improved for an optimal geometry of the cutting front. This reduces or prevents burr formation and reduces the roughness of the cut edges.
- the xz oscillation allows a front angle of a laser reduced steam capillary and adjust at any time during the welding process. In this way, optimal absorption ratios can be achieved, which can increase process efficiency or achieve greater stability of the capillary.
- the y-z oscillation allows a width of a weld seam to be adapted to technological requirements with regard to a connection width and seam strength and to be changed at any time during the welding process.
- the oscillation in three spatial directions allows the geometry of the laser-induced vapor capillary to be shaped in a targeted manner and adapted during the process with adapted frequency and amplitude values.
- the oscillation in three spatial directions allows the geometry of the weld pool to be set in a targeted manner and adapted during the process with adapted frequency and amplitude values. Relevant technological properties of the weld seam and its mechanical characteristics can be improved.
- the described method or the described device can also be used for additive manufacturing.
- FIG. 2 shows a schematic side view of the beam path of the device, in which the laser beam 2 first strikes a convex beam-shaping element 3, is reflected from there onto a concavely shaped deflection element 4 and from there passes through the focusing element 5 onto the workpiece surface 7 .
- Recurring features are provided with identical reference numerals in this figure as well as in the following figure.
- a relatively small beam width or a relatively small beam diameter d1 is formed, which can also be referred to as the beam waist diameter.
- the beam width of the focused laser beam 2 can be oscillated in a frequency range from 1 Hz to 100 kHz in a certain size range, for example between a focus diameter of 100 miti to 200 miti.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Laser Beam Processing (AREA)
- Electromagnetism (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018220336.9A DE102018220336A1 (de) | 2018-11-27 | 2018-11-27 | Vorrichtung und Verfahren zur Strahlformung und Strahlmodulation bei einer Lasermaterialbearbeitung |
PCT/EP2019/082372 WO2020109209A1 (de) | 2018-11-27 | 2019-11-25 | Vorrichtung und verfahren zur strahlformung und strahlmodulation bei einer lasermaterialbearbeitung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3887087A1 true EP3887087A1 (de) | 2021-10-06 |
Family
ID=68696422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19809449.2A Pending EP3887087A1 (de) | 2018-11-27 | 2019-11-25 | Vorrichtung und verfahren zur strahlformung und strahlmodulation bei einer lasermaterialbearbeitung |
Country Status (4)
Country | Link |
---|---|
US (1) | US20220037846A1 (de) |
EP (1) | EP3887087A1 (de) |
DE (1) | DE102018220336A1 (de) |
WO (1) | WO2020109209A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021221665A1 (en) * | 2020-04-30 | 2021-11-04 | Promega Corporation | Laser illumination techniques for capillary electrophoresis |
CN111958107B (zh) * | 2020-06-30 | 2022-09-23 | 北京航天控制仪器研究所 | 一种激光精细加工设备 |
EP4056309A1 (de) | 2021-03-09 | 2022-09-14 | Bystronic Laser AG | Vorrichtung und verfahren zum laserschneiden eines werkstücks und erzeugen von werkstückteilen |
DE102021126360A1 (de) * | 2021-10-12 | 2023-04-13 | Lpkf Laser & Electronics Aktiengesellschaft | Verfahren zur Bearbeitung eines Werkstücks durch Laserstrahlung in Form von Lissajous-Figuren sowie ein hierfür bestimmter Scanner und ein Spiegelelement |
DE102022123730A1 (de) * | 2022-09-16 | 2024-03-21 | TRUMPF Werkzeugmaschinen SE + Co. KG | Laserbearbeitung mit Scanneroptik |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3970501B2 (ja) * | 2000-06-19 | 2007-09-05 | 株式会社日平トヤマ | レーザ加工装置 |
JP5221560B2 (ja) * | 2007-11-27 | 2013-06-26 | 三星ダイヤモンド工業株式会社 | レーザ加工装置 |
DE102008053397B4 (de) | 2008-05-20 | 2012-12-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zum Schmelzschneiden von Werkstücken mit Laserstrahlung |
DE102009048519A1 (de) * | 2009-10-07 | 2011-04-14 | Minebea Co., Ltd. | Hydrodynamisches Lager |
DE14764437T1 (de) * | 2013-03-13 | 2019-09-12 | Ipg Photonics (Canada) Inc. | Verfahren und systeme zur kennzeichnung von laserbearbeitungseigenschaften durch messung von schlüssellochdynamiken mittels interferometrie |
DE102016204578B3 (de) * | 2016-03-18 | 2017-08-17 | Trumpf Laser- Und Systemtechnik Gmbh | Laserschweißen von Stahl mit Leistungsmodulation zur Heißrissvermeidung |
DE102017200119A1 (de) * | 2017-01-05 | 2018-07-05 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur prozessorientierten Strahlformanpassung und Strahlorientierung |
JP6863050B2 (ja) * | 2017-04-28 | 2021-04-21 | トヨタ自動車株式会社 | レーザ溶接方法及びレーザ溶接装置 |
DE102018106579A1 (de) * | 2018-03-20 | 2019-09-26 | Pulsar Photonics Gmbh | Verfahren zur Bearbeitung eines Werkstücks mittels Bestrahlung mit Laserstrahlung sowie Vorrichtung hierzu |
-
2018
- 2018-11-27 DE DE102018220336.9A patent/DE102018220336A1/de active Pending
-
2019
- 2019-11-25 US US17/297,487 patent/US20220037846A1/en active Pending
- 2019-11-25 WO PCT/EP2019/082372 patent/WO2020109209A1/de unknown
- 2019-11-25 EP EP19809449.2A patent/EP3887087A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
DE102018220336A1 (de) | 2020-01-09 |
US20220037846A1 (en) | 2022-02-03 |
WO2020109209A1 (de) | 2020-06-04 |
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