WO2022188922A1 - Dispositif de miroir pour système de fabrication permettant la fabrication à base de faisceau laser, système et procédé de fabrication - Google Patents

Dispositif de miroir pour système de fabrication permettant la fabrication à base de faisceau laser, système et procédé de fabrication Download PDF

Info

Publication number
WO2022188922A1
WO2022188922A1 PCT/DE2022/100172 DE2022100172W WO2022188922A1 WO 2022188922 A1 WO2022188922 A1 WO 2022188922A1 DE 2022100172 W DE2022100172 W DE 2022100172W WO 2022188922 A1 WO2022188922 A1 WO 2022188922A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser beam
movement
mirror
actuator
mirror element
Prior art date
Application number
PCT/DE2022/100172
Other languages
German (de)
English (en)
Inventor
Heiko Blunk
Markus Lingner
Original Assignee
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
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 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. filed Critical Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
Priority to EP22709575.9A priority Critical patent/EP4304803A1/fr
Publication of WO2022188922A1 publication Critical patent/WO2022188922A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0037—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the heat emitted by liquids
    • G01J5/004—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the heat emitted by liquids by molten metals
    • 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
    • B23K26/034—Observing the temperature of the workpiece
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to a mirror device for a manufacturing system for laser beam-based manufacturing, a manufacturing system for laser beam-based manufacturing, a method for manufacturing a component, and a computer program product.
  • Mirror devices for manufacturing systems for laser beam-based manufacturing are known in principle.
  • the laser beam used is moved in a work plane by a two-axis deflection unit, for example a galvanometer scanner, positioned and used to melt a powder material.
  • the energy distribution within the cross section of the laser beam is defined by optics and is usually not controllable.
  • such laser beams have a Gaussian energy distribution within the cross section of the laser beam.
  • the powder material absorbs the energy provided by the laser to form a melt pool.
  • the Gaussian energy distribution results in individual alloy components evaporating with certain materials and pores forming in the solidified material, since the intensity in the center of the laser beam is too high and deep welding occurs.
  • the focal lengths for focusing the laser beam are varied in order to be able to melt more material with the resulting larger laser beam diameter in the working plane.
  • Increasing the laser power and the feed rate does not usually lead to an improved process, since due to the absorption capacity of the material no increase in the
  • Feed speed is possible and the higher laser power can lead to the evaporation of the alloy components.
  • the intensity distribution can be configured in an annular manner, among other things.
  • the build-up rate i.e. the volume of material melted per unit of time
  • the change in intensity distribution goes with a larger diameter of the laser beam, which reduces the resolution of the process.
  • Another way to increase the build rate is to use multiple laser units that expose the powder at the same time. This leads to higher system costs, since optical elements for beam positioning are required for each laser unit used. Another disadvantage of this is that the boundary areas between the working areas of the individual laser scanners have to be adjusted precisely.
  • the known systems and methods are distinguished by a low build-up rate on the one hand and a high level of plant and process complexity on the other.
  • the mirror device for a manufacturing system for laser beam-based manufacturing comprising a movably arranged first mirror element for deflecting a Laser beam that can be moved in a working plane with a feed movement, and an actuator coupled to the first mirror element, the actuator being arranged and designed to move the first mirror element in such a way that the laser beam in the working plane executes a first superimposition movement, which preferably superimposed on the feed motion.
  • the invention is based on the finding that with a
  • Overlapping movement enables faster beam positioning and a more uniform energy input into the material or into the workpiece.
  • a quasi-stationary and freely programmable intensity distribution results on the workpiece or on the material in particular at the high frequencies of the superimposition movement, which will be explained in more detail below.
  • the superposition movement of the laser beam carried out with a high repetition rate, for example along a feed direction of the feed movement of the laser beam results in multiple exposure, which results in the material being heated through without evaporation. As a result, deep welding in particular is prevented and the formation of spatter and smoke is avoided or reduced.
  • the temperature gradient during the cooling process can be reduced by targeted post-heating of the melted material by means of the first superimposition movement and thus the risk of stress cracks in the material can be reduced. This enables the processing of other materials and thus creates new applications.
  • a circular superimposition movement it is possible, for example, to distribute the Gaussian energy distribution within the laser beam evenly over a larger area or a ring.
  • the mirror device is designed for a manufacturing system for laser beam-based manufacturing.
  • the laser beam-based production can include or be, for example, the manufacture and/or processing of a workpiece and/or component.
  • the manufacturing system can be a system for selective laser melting, for example.
  • the manufacturing system can be a system for laser beam cutting, welding and removal.
  • the mirror device comprises the movably arranged first mirror element.
  • the first mirror element is arranged and designed to deflect a laser beam. It is particularly preferred that the first mirror element is arranged such that it can be rotated and/or tilted.
  • the first mirror element preferably has a reflection surface.
  • the reflection surface is preferably flat in order to deflect a laser beam.
  • the reflection surface of the first mirror element is preferably designed in such a way that there is no beam shaping of the laser beam impinging on it. It is particularly preferable that the reflection surface is flat.
  • the reflection surface is also preferably provided with a reflective coating that is matched to the wavelength of the laser beam and is designed in such a way that the smallest possible proportion of the laser power is absorbed, so that a reflectivity of 100% is desirable.
  • the first mirror element is preferably of a size and/or a geometry that is weight-optimized, so that the first mirror element can be moved in a highly dynamic manner.
  • the mirror device has a cooling unit for cooling the first mirror element.
  • the cooling unit can be designed, for example, to apply a gas, in particular a high-purity gas, or air to the first mirror element.
  • the mirror device further includes the actuator.
  • the actuator is coupled to the first mirror element.
  • the actuator is with the first Mechanically coupled mirror element.
  • the mechanical coupling is preferably designed in such a way that the mirror device has a high level of rigidity and in particular a natural frequency that is above an operating frequency of the mirror device.
  • the natural frequency is preferably many times higher than the operating frequency.
  • the mechanical coupling is preferably designed essentially without play.
  • the actuator is preferably electromechanically coupled to the mirror element. It is particularly preferred that the mirror device has at least one coupling element, the first mirror element being coupled to the actuator by means of the at least one coupling element.
  • the actuator preferably has a cylindrical base body, which has a diameter of 25 mm and a height of 35 mm, for example.
  • the mirror device is also characterized in that the actuator is arranged and designed to move the first mirror element in such a way that the laser beam in the working plane executes a first superimposition movement that superimposes the feed movement.
  • the superposition movement is brought about in particular by the first mirror element.
  • the superimposition movement can be brought about by tilting the first mirror element back and forth.
  • a two-dimensional tilting movement preferably takes place about a pivot located in the central axis of the laser beam in the reflection surface. Due to the small deflection angle of the first mirror element, other spatial positions for the pivot point are also conceivable.
  • the feed movement usually takes place along a predefined working path.
  • the feed motion is implemented, for example, by galvanometer scanners.
  • the superimposition movement is an additional movement of the laser beam in the working plane that is essentially independent of the feed movement.
  • the overlay movement can be a unidirectional movement between a first position A and a second position B, for example. It is particularly preferred that from position B to position A a sudden return movement is provided.
  • the overlay movement can about it also contain any possible movement sequences, for example elliptical or loop-shaped.
  • the superimposition movement is characterized in particular by the fact that its speed is usually a multiple of the feed speed of the feed movement. It is particularly preferred that the speed of the superimposing movement is more than ten times, more than a hundred times and/or more than a thousand times higher than that
  • a preferred embodiment variant of the mirror device is characterized in that the first superimposition movement has a first movement distance of between 1 mm and 10 mm, in particular between 1 mm and 5 mm.
  • the movement distance is, in particular, the distance that exists between two points of the superimposition movement whose spacing is at a maximum.
  • the first movement distance can be the distance between two reversal points of the first superimposition movement.
  • the first movement distance can, for example, be a diameter of the first
  • the first superimposition movement is preferably designed as a reciprocating movement. In particular, such short movement distances lead to optimum heating of the area of the material or workpiece surrounding the laser beam. Thus, high build rates can be realized.
  • a preferred development of the mirror device is characterized in that the actuator is arranged and designed to move the first mirror element in such a way that a quasi-stationary intensity distribution is established.
  • the disadvantage of a Gaussian energy distribution in the laser beam can be reduced or eliminated by a quasi-stationary intensity distribution.
  • the actuator is arranged and designed to move the first mirror element at a frequency of more than 0.5 kilohertz, preferably more than 1 kilohertz, further preferably more than 1.5 kilohertz, in particular more than 2 kilohertz . With such high frequencies, the quasi-stationary intensity distribution is made possible in an advantageous manner.
  • the first mirror element is tilted back and forth at the frequencies described above. If the first mirror element is tilted back and forth with one of these frequencies, the laser beam also moves with a heterodyning movement corresponding to this frequency.
  • the first mirror element is arranged such that it can be tilted about a first tilting axis.
  • the first mirror element is coupled to the actuator in such a way that the actuator moves the first mirror element back and forth between a first tilting end position and a second tilting end position.
  • the first mirror element is arranged such that it can be tilted about a second tilting axis, the second tilting axis being aligned essentially orthogonally to the first tilting axis.
  • Different superimposition movements are made possible with a first tilting axis and a second tilting axis.
  • circular or elliptical or loop-shaped superimposition movements of the laser beam can be realized with two tilting axes.
  • the actuator is a piezo element or includes it.
  • the actuator preferably comprises two or more, in particular a large number, of piezo elements.
  • a piezo element is in particular a component that utilizes the piezo effect.
  • a mechanical movement is brought about in particular by the application of an electrical voltage.
  • high frequencies of a mechanical movement can be generated with piezo elements.
  • piezo elements are advantageously characterized by high rigidity.
  • the actuator is or comprises a drive, in particular a direct drive.
  • the direct drive includes in particular at least one permanent magnet and an electrical coil that is designed to be controllable. Additionally, the direct drive may be or may include a voice coil. A voice coil is also known as a voice coil.
  • the mirror device includes a sensor for detecting a melt bath temperature of a melt bath.
  • the sensor is preferably a photodiode and/or a thermal camera.
  • the mirror device comprises a splitter mirror arranged in the beam path of the laser beam, which reflects the laser beam and transmits radiation reflected from the melt pool, the sensor and the splitter mirror being arranged in such a way that the sensor detects the transmitted, reflected radiation.
  • the mirrors arranged in the beam path of the laser beam are always arranged in such a way that they are directed towards the melt pool, radiation reflected from the melt pool is also reflected back via these mirrors, especially if the coating of the mirrors in the beam path also reflect the required wavelengths and the transmissive ones Optics let the reflected light through.
  • a sensor arranged behind this splitter mirror can detect the reflected radiation. It is particularly preferred that the sensor is arranged behind the splitter mirror.
  • the mirror device comprises a movably arranged second mirror element, the actuator and/or another actuator being arranged and designed to move the second mirror element in such a way that the laser beam is in the Working plane executes a second overlay movement superimposed on the feed movement.
  • the second superimposition movement can be designed to be the same as or different from the first superimposition movement.
  • the first superimposition movement has a first movement pattern that is different from the second superimposition movement. This means in particular that the first movement pattern is different from a second movement pattern of the second superimposed movement.
  • the first movement pattern of the first superposition movement can be, for example, a substantially unidirectional movement between two positions.
  • the second movement pattern of the second superimposition movement can be circular, elliptical and/or loop-shaped, for example.
  • a further preferred development of the mirror device is characterized in that it comprises a control device for controlling the first mirror element, the second mirror element and/or the actuator.
  • the control device is preferably coupled in terms of signals to the actuator and/or the further actuator. It is particularly preferred that output signals of the control device can be used as input signals by the actuator and/or the further actuators.
  • a further preferred embodiment variant of the mirror device is characterized in that the control device is set up to control the actuator in such a way that the first superimposition movement and/or the second superimposition movement is/are aligned parallel to the feed movement.
  • Such a first or second superimposition movement aligned parallel to the feed movement is preferably unidirectional, so that it occurs uniformly from a first position A to a second position B and then returns to the starting position A with a step function.
  • control device is set up to control the actuator in such a way that the first superimposition movement and/or the second superimposition movement is/are aligned orthogonally to the feed movement. Such a superimposition movement is in particular aligned transversely to the feed movement.
  • control device is set up to control the actuator in such a way that the first superposition movement and/or the second superimposition movement has a circular, elliptical and/or loop-shaped first movement pattern and/or second movement pattern.
  • the control device is set up to receive a temperature signal from the sensor that characterizes the melt bath temperature of the melt bath and to control and/or regulate a laser unit, in particular a laser power, based on the temperature signal.
  • the laser unit which in particular is not comprised by the mirror device, can be controlled or regulated by means of a correspondingly configured signal from the control device.
  • control device is set up to control the actuator in such a way that one of the mirror elements is moved with a substantially translational movement and the other mirror element is moved with a substantially rotary movement.
  • This can mean, for example, that the first mirror element is moved with a translatory movement and the second mirror element is moved with a rotary movement.
  • control device can be coupled in terms of signals to a laser scanner and is set up to control the actuator as a function of the advance movement of the laser beam caused by the laser scanner.
  • the first superposition movement is aligned orthogonally to the feed movement.
  • the control device can consequently control the actuator, for example, in such a way that the first superimposition movement takes place essentially exclusively in the y-direction.
  • the previously described control of the actuator by means of the control device can be set up in an analogous manner for the further actuator.
  • a further preferred embodiment variant of the mirror device is characterized in that it comprises two or three further mirror elements which are arranged in such a way that the laser beam is aligned essentially coaxially in front of the first mirror element in the laser beam direction and behind the last of the four mirror elements in the laser beam direction.
  • Such a mirror device is in particular designed to be retrofittable, so that it can be installed in existing production systems.
  • the object mentioned at the outset is achieved by a manufacturing system for laser beam-based manufacturing, comprising a laser unit for emitting a laser beam and a mirror device according to one of the embodiment variants described above.
  • the laser unit can be a solid-state laser or a CO2 laser, for example. Furthermore, any other laser suitable for laser beam-based production can be used.
  • the laser unit can be or include a fiber laser, for example.
  • the laser unit is preferably set up in such a way that the emitted laser beam has a wavelength of 1064 nm.
  • the laser unit also preferably has an output of between 400 W and 1000 W.
  • a preferred embodiment variant of the production system comprises a collimation area in which the laser beam is essentially collimated, with the mirror device being arranged in the collimation area, in particular between a collimator unit and a focusing unit.
  • the production system comprises a laser scanner, the control device being coupled to the laser scanner in terms of signals and controlling the first mirror element as a function of a feed movement of the laser beam caused by the laser scanner.
  • the production system is preferably a laser processing machine, in particular for laser beam melting, for selective laser melting, for laser beam cutting, for laser beam welding and/or for laser beam ablation.
  • the object mentioned at the outset is achieved by a method for laser beam-based production of a component with a laser beam that can be moved in a working plane with a feed movement, comprising the step of: controlling an actuator coupled to a first mirror element, the mirror element being arranged for deflecting the laser beam is such that the laser beam performs a first superimposition movement in the working plane, which preferably superimposes the feed movement.
  • a preferred embodiment variant of the method includes the step: tilting the first mirror element about a first tilting axis, in particular moving the first mirror element between a first tilting end position and a second tilting end position.
  • the method can include the step: tilting the first mirror element about a second tilting axis.
  • the method can include the step: controlling and/or regulating a laser unit, in particular a laser power of the laser unit, based on a temperature signal that characterizes a melt bath temperature of a melt bath.
  • the laser power can be controlled and/or regulated based on a position of the first mirror element.
  • it is preferred that the laser power is controlled and/or regulated based on a speed of the laser beam in a working plane.
  • the method can include the step: controlling the actuator as a function of the feed movement caused by the laser scanner Computer program cause this by a computer to perform the method according to one of the embodiments described above.
  • FIG. 1 shows a schematic, two-dimensional view of an exemplary embodiment of a manufacturing system with a mirror device
  • FIG. 2 shows a further schematic, two-dimensional view of an exemplary embodiment of a manufacturing system with a mirror device
  • 3 shows a further schematic, two-dimensional view of an exemplary embodiment of a manufacturing system with a mirror device
  • FIG. 4 shows a schematic view of exemplary superimposition movements of a laser beam in a working plane
  • Figure 5 a schematic method.
  • the manufacturing system 1 shown in FIG. 1 comprises a laser unit 18 for emitting a laser beam 16, 24.
  • the laser unit can be a solid-state laser or a CO2 laser, for example. Any other laser suitable for laser beam-based production can also be used.
  • the one from the laser unit 18 emitted laser beam first strikes a collimator unit 20 which collimates the laser beam 16 .
  • the collimated laser beam 16 then strikes a mirror device 2. Within the mirror device 2, the collimated laser beam 16 first strikes a mirror element 10, then a further mirror element 8 and then a first mirror element 4.
  • the first mirror element 4 is movably arranged.
  • the first mirror element 4 is arranged to deflect the laser beam about two axes aligned substantially orthogonally to one another.
  • the first mirror element 4 is designed to deflect the laser beam 16 .
  • the first mirror element 4 is coupled to an actuator 6 .
  • the actuator 6 is arranged and designed to move the first mirror element 4 in such a way that the focused laser beam 24 , which will be explained in more detail below, executes a first superimposition movement 46 in the working plane 28 that superimposes the feed movement 36 .
  • the actuator 6 preferably includes a large number of
  • Piezo elements so that the mirror element 4 moves back and forth about a tilting axis at a high frequency, for example two kilohertz.
  • the laser beam 16 is deflected by the first mirror element 4 onto a further mirror element 12 .
  • the mirror elements 4, 8 to 12 are each arranged in such a way that the laser beam is deflected by 90 degrees. Since a total of four mirror elements 4, 8 to 12 are arranged within the mirror device 2, the laser beam has the same orientation in the beam direction in front of the mirror device 2 and behind the mirror device 2.
  • the laser beam strikes a focusing unit 22.
  • the collimated laser beam 16 is focused within the focusing unit 22, so that a focused laser beam 24 is formed.
  • the focused laser beam 24 strikes a laser scanner 26.
  • the laser scanner can be a galvanometer scanner, for example.
  • the laser scanner 26 directs the focused laser beam 24 onto the working plane 28.
  • the laser scanner 26 is preferably arranged and designed in such a way that that the focal point of the focused laser beam 24 lies essentially in the working plane 28 .
  • the movement of a focused laser beam 24 in a working plane 28 with a laser scanner 26 is known in principle.
  • a disadvantage of this in the past was that the laser beam was focused in the working plane 28 in such a way that stress cracks occurred within the solidified material as a result of the punctiform input of energy and the associated steep temperature gradient. This limited the choice of materials for the laser beam melting process. In addition, with certain materials the temperatures were so high that individual alloy components evaporated and pores formed in the solidified material.
  • These disadvantages are prevented by the mirror device 2.
  • the focused laser beam 24 can be moved back and forth in the working plane 28 about a predefined center point. Furthermore, it can revolve around the center. As a result, the area surrounding the predefined center point is preheated and, if necessary, also postheated.
  • the mirror device 2 also enables the melt bath in the working plane 28 to be monitored.
  • the mirror device 2 has a photodiode 14 for this purpose.
  • the photodiode 14 is arranged behind the mirror element 8 designed as a splitter mirror. By reflecting radiation from the melt pool, which travels backwards through the path of the laser beam described above, this radiation impinges on the photodiode 14.
  • the mirror device 2 also includes a control device 50.
  • the control device 50 is connected to the photodiode 14, the actuator 6, the laser unit 18 and the laser scanner 26 are signal-coupled.
  • the control device 50 is designed to control the first mirror element 4 , the laser unit 18 , the actuator 6 and the laser scanner 26 .
  • the control device 50 is set up to control the actuator 6 in such a way that the first superposition movement 46 is parallel and/or orthogonal to the Feed movement 36 is aligned and / or has a circular, elliptical and / or loop-shaped first movement pattern.
  • the control device 50 is also preferably set up to receive a temperature signal characterizing a melt bath temperature of the melt bath from the photodiode 14 and to control and/or regulate the laser unit 18 based on the temperature signal.
  • the control device 50 is coupled to the laser unit 18 in terms of signals.
  • the control device 50 is set up in such a way that it can control the laser power as a function of an angular position of the mirror element 4 and as a function of a current path speed of the laser beam in the working plane 28 .
  • the laser power can also be influenced by the control device 50 varying the frequency and/or the duty cycle of the laser beam.
  • the structure of the mirror device 2 differs from the structure described above in that a second mirror element and a second actuator 32 are provided.
  • a second superposition movement 48 can be implemented with the second mirror element 30 . It is thus possible, for example, for the laser beam 24 to perform a unidirectional and a circular movement around the center point 34 .
  • the photodiode 14 is arranged behind the mirror element 12 here, so that the mirror element 12 is designed as a splitter mirror.
  • the control device 50 described with reference to FIG. 1 can be provided in an analogous manner with the necessary adjustments in the production system 1 shown in FIG. 3 shows a further preferred embodiment of the production system 1.
  • This production system has a laser unit 18 and a collimator unit 20 for emitting a collimated laser beam 16.
  • the mirror device 2 comprises a first mirror element 4 and an actuator 6.
  • the collimated laser beam 16 reflected by the first mirror element 4 impinges on the laser scanner 26, which deflects the collimated laser beam 16 to a plane field lens 27.
  • FIG. 4 shows possible overlay movements 46, 48 in the working plane 28 of the focused laser beam 24.
  • the solid line in the middle represents the position of the laser beam 24 predefined by the working path at a point in time without taking into account the overlay movements 46, 48. This position would Adjust if mirror assembly 2 is not used.
  • the laser beam 24 is moved with the feed movement 36 along the predefined work path.
  • the superposition movements 46, 48 are superimposed on this movement.
  • the laser beam 24 can move back and forth continuously with the first superimposition movement 46 such that it moves back and forth between the first parallel end point 42 and the second parallel end point 44 .
  • the parallel end points 42, 44 are moved along with the focused laser beam 24 along the feed movement 36.
  • the laser beam 24 can also be moved with a second superposition movement 48 so that the laser beam 24 is moved back and forth between the first orthogonal end point 38 and the second orthogonal end point 40 .
  • the area surrounding the focused laser beam 24 is preheated and/or postheated.
  • the feed speed of the feed movement 36 can be increased.
  • step 100 the actuator 6 coupled to the first mirror element 4 is controlled, with the first mirror element 4 being arranged to deflect the laser beam 16 in such a way that the laser beam 24 in the working plane 28 executes a first superimposition movement 46 superimposed on the feed movement 36.
  • step 102 a second actuator 32 is controlled to move a second mirror element 30, so that a second superposition movement 48 is made possible. Steps 100 and 102 are preferably carried out at the same time.
  • step 104 the laser unit 18 is controlled based on a temperature signal. The laser power is also dependent a position of the laser beam in the working plane and a speed of the laser beam in the working plane and/or regulated.
  • the control device 50 is preferably coupled in terms of signals to a controller for the laser scanner 26 so that the orientation of the tilting mirror movement can be synchronized with the current direction of movement of the laser scanner 26 .
  • the temperature sensor 14 is arranged behind the mirror element 12, it is preferable for the temperature sensor to be in the form of a thermal camera in order to advantageously record the temperature distribution over a larger area.
  • the photodiode described above and the thermal camera preferably have an essentially identical field of view.
  • mirror element 10 mirror element 12
  • mirror element 14 photodiode 16
  • collimated laser beam 18 laser unit 20
  • collimator unit 22 focusing unit 24 focused laser beam 26 laser scanner

Landscapes

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

Abstract

L'invention se rapporte à un dispositif miroir (2) pour système de fabrication (1) permettant la fabrication à base de faisceau laser, à un système de fabrication (1) permettant la fabrication à base de faisceau laser, à un procédé de fabrication d'un élément, et à un produit programme d'ordinateur. En particulier, l'invention se rapporte à un dispositif miroir (2) pour un système de fabrication (1) permettant la fabrication à base de faisceau laser, comprenant un premier élément de miroir (4) disposé de façon mobile pour dévier un faisceau laser (16, 24), qui est mobile avec un mouvement d'avance (36) dans un plan de travail (28), et un actionneur (6) accouplé au premier élément de miroir (4), l'actionneur (6) étant agencé et conçu pour déplacer le premier élément de miroir (4) de telle sorte que le faisceau laser (16, 24) effectue un premier mouvement de superposition (46) dans le plan de travail (28).
PCT/DE2022/100172 2021-03-08 2022-03-03 Dispositif de miroir pour système de fabrication permettant la fabrication à base de faisceau laser, système et procédé de fabrication WO2022188922A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22709575.9A EP4304803A1 (fr) 2021-03-08 2022-03-03 Dispositif de miroir pour système de fabrication permettant la fabrication à base de faisceau laser, système et procédé de fabrication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021105559.8 2021-03-08
DE102021105559.8A DE102021105559A1 (de) 2021-03-08 2021-03-08 Spiegelvorrichtung für ein Fertigungssystem zur laserstrahlbasierten Fertigung, Fertigungssystem und Verfahren

Publications (1)

Publication Number Publication Date
WO2022188922A1 true WO2022188922A1 (fr) 2022-09-15

Family

ID=80735510

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2022/100172 WO2022188922A1 (fr) 2021-03-08 2022-03-03 Dispositif de miroir pour système de fabrication permettant la fabrication à base de faisceau laser, système et procédé de fabrication

Country Status (3)

Country Link
EP (1) EP4304803A1 (fr)
DE (1) DE102021105559A1 (fr)
WO (1) WO2022188922A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10027148A1 (de) * 2000-05-31 2001-12-06 Volkswagen Ag Vorrichtung zur Bearbeitung eines Werkstückes mittels eines fokussierbaren Lasers
DE102007025461A1 (de) * 2006-06-14 2007-12-27 Atn Automatisierungstechnik Niemeier Gmbh Quasisimultanbearbeitung mit Laserscanner
DE102008022014B3 (de) * 2008-05-02 2009-11-26 Trumpf Laser- Und Systemtechnik Gmbh Dynamische Strahlumlenkung eines Laserstrahls
DE102010018377A1 (de) * 2010-04-26 2011-04-28 Labom Meß- und Regeltechnik GmbH Funktionsbauteil wie Druckmittler mit einer Metallfolie aus Sonderwerkstoff, Verfahren zum Anschweißen einer Metallfolie aus Sonderwerkstoff sowie Laserstrahlschweißeinrichtung hierfür
DE102016107581B3 (de) * 2016-02-16 2017-04-13 Scansonic Mi Gmbh Schweißverfahren zum Verbinden von Werkstücken an einem Überlappstoß
US20210060701A1 (en) * 2018-08-30 2021-03-04 Ipg Photonics Corporation Backside surface welding system and method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10027148A1 (de) * 2000-05-31 2001-12-06 Volkswagen Ag Vorrichtung zur Bearbeitung eines Werkstückes mittels eines fokussierbaren Lasers
DE102007025461A1 (de) * 2006-06-14 2007-12-27 Atn Automatisierungstechnik Niemeier Gmbh Quasisimultanbearbeitung mit Laserscanner
DE102008022014B3 (de) * 2008-05-02 2009-11-26 Trumpf Laser- Und Systemtechnik Gmbh Dynamische Strahlumlenkung eines Laserstrahls
DE102010018377A1 (de) * 2010-04-26 2011-04-28 Labom Meß- und Regeltechnik GmbH Funktionsbauteil wie Druckmittler mit einer Metallfolie aus Sonderwerkstoff, Verfahren zum Anschweißen einer Metallfolie aus Sonderwerkstoff sowie Laserstrahlschweißeinrichtung hierfür
DE102016107581B3 (de) * 2016-02-16 2017-04-13 Scansonic Mi Gmbh Schweißverfahren zum Verbinden von Werkstücken an einem Überlappstoß
US20210060701A1 (en) * 2018-08-30 2021-03-04 Ipg Photonics Corporation Backside surface welding system and method

Also Published As

Publication number Publication date
EP4304803A1 (fr) 2024-01-17
DE102021105559A1 (de) 2022-09-08

Similar Documents

Publication Publication Date Title
EP3256285B1 (fr) Dispositif d'irradiation, machine de traitement et procédé de fabrication d'une couche ou d'une sous-zone d'une couche d'une pièce tridimensionnelle
EP2925481B1 (fr) Procédé et dispositif de traitement de matériau par rayons laser
DE102011011734B4 (de) Vorrichtung, Anordnung und Verfahren zur Interferenzstrukturierung von flächigen Proben
EP3408050B1 (fr) Dispositif et méthode pour un procédé d'usinage thermique
DE19513354A1 (de) Materialbearbeitungseinrichtung
EP2429755B1 (fr) Dispositif et procédé permettant l'usinage périphérique au laser d'un cordon de matière
WO2004020141A1 (fr) Unite de formation de faisceau possedant deux lentilles axicon et dispositif pourvu de ladite unite permettant d'introduire de l'energie de rayonnement dans une piece constituee d'un metal peu absorbant
CH710428B1 (de) Laserbearbeitungssysteme und -verfahren, die einen Laserstrahl dithern können.
DE102020102077B4 (de) Laserbearbeitungsvorrichtung und Verfahren zur Laserbearbeitung eines Werkstücks
WO2009132764A1 (fr) Procédé d'usinage au laser de pièces au moyen d'un faisceau laser et d'une déviation dynamique de ce faisceau laser
EP3274121A1 (fr) Procédé de jonction par faisceau laser et optique d'usinage laser
EP3414044B1 (fr) Procédé de production d'une partie d'une couche d'un composant tridimensionnel
DE102019115554A1 (de) Bearbeitungsvorrichtung zur Laserbearbeitung eines Werkstücks und Verfahren zur Laserbearbeitung eines Werkstücks
WO2020109209A1 (fr) Dispositif et procédé de formation et de modulation de faisceau dans le traitement de matériaux au laser
WO2019158580A1 (fr) Système d'ajustement d'un écoulement de poudre par rapport à l'axe longitudinal central d'un rayon d'énergie
DE3916264A1 (de) Einrichtung zur strahlfuehrung bei der laser-werkstueckbearbeitung
WO2019233944A1 (fr) Dispositif de traitement au laser de pièces difficilement accessibles
EP3747588A1 (fr) Dispositif d'usinage destiné à l'usinage laser d'une pièce et procédé d'usinage laser d'une pièce
WO2022028879A1 (fr) Procédé de soudage laser d'électrodes
DE102009047995B3 (de) Verfahren zur gratfreien trennenden Bearbeitung von Werkstücken
EP3603871A1 (fr) Dispositif et procédé d'usinage d'une pièce par rayonnement laser
WO2021122894A1 (fr) Procédé d'usinage laser de matière et installation d'usinage laser
WO2022188922A1 (fr) Dispositif de miroir pour système de fabrication permettant la fabrication à base de faisceau laser, système et procédé de fabrication
DE102015200795B3 (de) Anordnung zur Bestrahlung einer Objektfläche mit mehreren Teilstrahlen ultrakurz gepulster Laserstrahlung
EP0683007B1 (fr) Dispositif d'usinage

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22709575

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2022709575

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2022709575

Country of ref document: EP

Effective date: 20231009