WO2022058270A1 - Instrument de mesure pour outil laser, outil laser et dispositif d'usinage de pièce et procédé pour mesurer une distance - Google Patents

Instrument de mesure pour outil laser, outil laser et dispositif d'usinage de pièce et procédé pour mesurer une distance Download PDF

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Publication number
WO2022058270A1
WO2022058270A1 PCT/EP2021/075063 EP2021075063W WO2022058270A1 WO 2022058270 A1 WO2022058270 A1 WO 2022058270A1 EP 2021075063 W EP2021075063 W EP 2021075063W WO 2022058270 A1 WO2022058270 A1 WO 2022058270A1
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WO
WIPO (PCT)
Prior art keywords
laser
measuring instrument
optics
processing
measuring
Prior art date
Application number
PCT/EP2021/075063
Other languages
German (de)
English (en)
Inventor
Alexander Franz
Original Assignee
Volkswagen Aktiengesellschaft
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 Volkswagen Aktiengesellschaft filed Critical Volkswagen Aktiengesellschaft
Priority to CN202180062988.2A priority Critical patent/CN116113515A/zh
Publication of WO2022058270A1 publication Critical patent/WO2022058270A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • 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
    • 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
    • B23K26/1462—Nozzles; Features related to nozzles

Definitions

  • the invention relates to a measuring instrument for a laser tool. Furthermore, the invention according to patent claim 6 relates to a laser tool that can be equipped with such a measuring instrument. According to patent claim 7, the invention relates to a workpiece processing device which has the laser tool. Furthermore, the invention according to patent claim 8 relates to a method for measuring a distance between a laser tool and a workpiece.
  • Laser beam-based manufacturing methods or machining methods of workpieces using a laser machining system require accurate and precise knowledge of the beam profile of a machining laser beam or beam bundle that hits the workpiece at the machining point - also known as TCP (Tool Center Point).
  • This beam profile of the processing laser beam is determined by beam parameters such as focus diameter, position of a beam waist, laser beam power, beam parameter product (beam quality) and wavelength.
  • a variable variable that strongly influences the process is the position of the beam waist relative to the workpiece or processing point.
  • Measuring devices or principles are currently used to measure the beam profile, by means of which the beam profile can be measured with high precision when the laser processing system is started up, but which massively disrupt a process flow, since these conventional measuring devices or principles are particularly complex. Because, for example, a set-up time for applying such a measuring device to/in the laser processing system is undesirably long. Consequently, a particularly long downtime of the laser processing system is required, which leads to uneconomical operation of the laser processing system.
  • a possibly resulting undesired displacement of the processing point by only a few millimeters, for example due to a (even slight) collision of an element the laser processing system with another object and/or due to actuators that no longer function as intended, may result in the desired position of the beam waist no longer being precisely aligned with the workpiece, with the result that the dimensional accuracy and quality of joints are compromised or joints of the processed or manufactured by means of the laser processing system workpieces within a batch suffers.
  • US 2019/015931 A1 discloses a device and a method for measuring a distance between a laser processing head and a workpiece, a measuring light beam being coupled into a processing light path of a processing light beam and being focused onto a surface of the workpiece by means of a focusing lens of the processing light path, with a reflected Measuring light beam and a reference measuring light beam are superimposed and provided to an evaluation unit, which detects the distance between the laser processing head and the workpiece based on interferometry.
  • this conventional device or this conventional method is, on the one hand, particularly complex, since in order to couple the measuring light beams into the processing light path, the measuring light beams have to be deflected several times, as a result of which this device is particularly complex in terms of structure. Furthermore, the particularly complex measuring principle of interferometry contributes to the particularly high effort that is required to measure the distance between the laser processing head and the workpiece using this conventional device.
  • the object of the present invention is to provide a measuring instrument by means of which a distance between a workpiece and the measuring instrument can be measured particularly efficiently.
  • a measuring instrument is provided for a laser tool, the laser tool being designed in particular to project a processing laser beam onto, onto and/or into a workpiece in order to process the workpiece using the processing laser beam.
  • laser processing includes, for example, removing or separating material, connecting, for example welding, material, refining a surface of the workpiece, etc.
  • the processing laser beam is formed with a beam waist during operation of the same, the position of which characterizes a processing point (TCP: tool center point) of the laser tool. If an actual distance and a target distance between the laser tool and the workpiece deviate from one another in an undesired manner, the beam waist and, as a result, the processing point is shifted in an undesired manner in relation to the workpiece. The quality of the laser machining and/or the quality of the machined workpiece then suffers as a result during the laser machining of the workpiece.
  • TCP tool center point
  • the measuring instrument To measure the distance—that is, the actual distance—between the measuring instrument and an object, in particular the workpiece, the measuring instrument has a laser triangulation sensor, by means of which a measuring laser beam can be emitted from the measuring instrument onto the object.
  • the measuring laser beam can be reflected when it hits the object or workpiece as a reflection measuring laser beam by means of the object, in particular by means of an outer surface of the object, so that the reflection measuring laser beam is thrown in the direction of the laser triangulation sensor, with the reflection measuring laser beam laser beam can then be received by the laser triangulation sensor.
  • the measuring laser beam is (at least partially) thrown back in the direction of the laser triangulation sensor as the reflection measuring laser beam, forming a reflection angle between the measuring laser beam and the reflection measuring laser beam on/on the surface of the object or workpiece, with the reflection angle depending on the distance of the object or Corresponds to the workpiece between the measuring instrument and the workpiece.
  • the reflectance measuring laser beam arrives at/in the laser triangulation sensor at an angle of incidence that depends on the angle of reflection, with the distance between the measuring instrument and the object being detectable or determinable by means of a suitable evaluation unit by processing a measure of the angle of incidence.
  • the measuring instrument also has a housing in which the laser triangulation sensor is arranged.
  • the housing is at least partially translucent, so that it is possible for the measuring laser beam, which can be emitted by the laser triangulation sensor, to exit the housing as intended and for the reflection measuring laser beam to enter the housing as intended.
  • the housing has transmissive properties in relation to a used wavelength of the reflection measuring laser beam and the measuring laser beam.
  • the invention provides that the housing has an external shape that corresponds to an external shape of an optics protection element of a processing laser optics of the laser tool.
  • the processing laser optics has, in particular, a large number of optics elements, for example lenses, mirrors, prisms etc. and/or combinations thereof. In order to protect these optical elements that break the light against contamination from the outside (e.g.
  • the processing laser optics have, in particular, the optics protection element, which is designed, for example, as a protective glass pane.
  • the optics protection element is designed, for example, as a protective glass pane.
  • Such an optical protection element, that is, for example, the protective glass pane is designed in particular to let light through as undisturbed as possible, in particular not to break it or only to break it particularly easily.
  • the housing of the laser tool for example a housing of the processing laser optics, is at least partially formed by the optics protection element or by the protective glass pane, so that it is ensured that the Optical elements emerging processing laser beam exits during operation of the laser tool under a irradiation of the optics protection element from the housing and towards the workpiece.
  • the housing of the measuring instrument and the optics protection element correspond to one another in such a way that the housing of the measuring instrument can be inserted into the processing laser optics of the laser tool instead of the optics protection element, and vice versa.
  • the measuring instrument is designed in particular to be mobile in relation to the laser tool, that is to say designed separately from the laser tool.
  • the measuring instrument in particular its housing, is designed as an insert element which corresponds to a receiving element of the laser tool, with the receiving element of the laser tool corresponding both to the housing of the measuring instrument and to the optics protection element, so that either the measuring instrument or the optics protection element is the respective insertion element can be used in the receiving element of the laser tool.
  • receiving elements for the optics protection element (“protective glass drawers”) are standardized, so that the position of the optics protection element in relation to the processing point of the laser tool is known.
  • the measuring instrument when the measuring instrument is inserted into the laser tool, its position in relation to the processing point of the laser tool is known. It is thus possible to use the measuring instrument to determine the distance between the laser tool and the workpiece based on the distance between the processing point and the optical protection element.
  • a distance sensor designed differently from a laser triangulation sensor for example an ultrasonic sensor, etc., is used as the distance sensor—as an alternative or in addition to the laser triangulation sensor.
  • the measuring instrument has a mirror element in its housing, by means of which the measuring laser beam can be deflected in the direction of the object or workpiece and the reflection measuring laser beam can be deflected in the direction of the laser triangulation sensor.
  • both the measurement laser beam and the reflection measurement laser beam are deflected by approximately 90 degrees by means of the mirror element.
  • the mirror element for example a deflection mirror, can be used to redirect a beam path or a beam path of the measuring laser beam into a beam path or path of the processing laser optics, which also advantageously means that the distance between the laser tool or the measuring instrument and the object or workpiece can be detected, which is particularly important for uneven workpieces. In other words, a distance formed directly between the processing laser optics and the object is measured during operation of the measuring instrument. Because the measuring laser beam, which can be emitted by means of the measuring laser beam, can be projected coaxially to the beam path or beam path of the processing laser beam and in particular at least partially through the processing laser optics onto the processing point by means of the mirror element.
  • the measuring instrument has an output unit, by means of which a distance value characterizing the distance between the measuring instrument and the object can be provided.
  • the output unit has a display, by means of which the distance value can be provided, for example in the form of text, in particular numbers, can be displayed.
  • a (human) operator of the measuring instrument and/or the laser tool to read the distance value from the output unit, in particular from the display, in order to then adjust or readjust the laser tool based on the distance value in order to ensure a particularly high quality of the To ensure laser processing and consequently the workpiece.
  • the output unit--as an alternative or in addition to the display-- has a data communication element, by means of which the distance value can be made available in data form to a workpiece processing device.
  • the distance value is made available by means of the output unit of the workpiece processing device, in particular a control unit of the workpiece processing device, with the control unit of the workpiece processing device being configured for this, for example to adjust or readjust an actuator of the workpiece processing device, for example a robot arm, based on the distance value provided.
  • the laser tool as a be formed distal end member of a robot, this robot forms the workpiece processing device.
  • the laser tool is arranged on a distal end member of the robot or the workpiece processing device.
  • both the actuators and the laser tool and in particular the measuring instrument can be controlled by means of the control unit of the workpiece processing device, for which purpose, for example, the measuring instrument is coupled or can be coupled to the control unit.
  • the human operator can be dispensed with, at least for the adjustment or readjustment, since the measuring instrument, which interacts with the workpiece processing device in the manner described, enables an automatic adjustment or readjustment process.
  • the human operator advantageously only has to insert the measuring instrument into the processing laser optics of the laser tool instead of the optics protection element. This eliminates a source of human error from the process of adjustment or readjustment, in that the distance value is made available directly to the workpiece processing device by means of the data communication element.
  • the invention in a further (second) aspect, relates to a laser tool for laser processing an object, in particular a workpiece, with a measuring instrument designed according to the above description. Due to the measuring instrument, which is designed to measure a distance between the measuring instrument and the workpiece, the laser tool is set up to determine a distance between the object or workpiece and the laser tool by using the measuring instrument to measure the distance between the measuring instrument and the object or workpiece is measured and from this the distance between the object/workpiece and the laser tool is determined, for example calculated.
  • the laser tool has a laser light source and processing laser optics, the processing laser optics comprising a receiving element, by means of which an optics protection element of the processing laser optics can be removed non-destructively from the processing laser optics and/or can be inserted into them.
  • this aspect of the invention provides for the housing of the measuring instrument to have an external shape that corresponds to an external shape of the optics protection element, whereby the housing and consequently the measuring instrument can be used in the processing laser optics and/or can be removed from the processing laser optics in a reversible, non-destructive manner. It means that the measuring instrument can be used as intended in the processing laser optics when the optics protection element has been removed from the processing laser optics as intended. In other words, both the optics protection element and the measuring instrument are designed to correspond to the processing laser optics, so that the optics protection element and the measuring instrument can be exchanged for one another in relation to these processing laser optics.
  • the invention also includes developments of the laser tool according to the invention, which have features as have already been described in connection with the developments of the measuring instrument according to the invention. For this reason, the corresponding developments of the laser tool according to the invention are not described again here.
  • a workpiece processing device in particular a workpiece processing robot, has a laser tool designed in accordance with the above description.
  • the workpiece processing device is designed to use the laser tool, which in particular includes the measuring instrument, to measure a distance between a workpiece and the laser tool or measuring instrument particularly efficiently in order to ensure a particularly high quality of the laser processing and consequently of the (processed) workpiece to guarantee.
  • the invention also includes developments of the workpiece processing device according to the invention, which have features as have already been described in connection with the developments of the measuring instrument according to the invention and/or with the developments of the laser tool according to the invention. For this reason, these corresponding developments of the workpiece processing device according to the invention are not presented again here.
  • the invention also relates to a method for determining a distance between a laser tool and an object designed, for example, as a workpiece, with an optics protection element of the laser tool being removed reversibly non-destructively from a processing laser optics of the laser tool and a measuring instrument instead of the optics protection element used in the processing laser optics.
  • the laser tool and the measuring instrument are designed according to the above description.
  • the invention also includes developments of the method according to the invention, which have features as have already been described in connection with the developments of the measuring instrument according to the invention, the laser tool according to the invention and/or the workpiece processing device according to the invention. For this reason, these corresponding developments of the method according to the invention are not presented again here.
  • the invention also includes the combinations of features of the described embodiments.
  • FIG. 1 An exemplary embodiment of the invention is described below.
  • the figure shows a schematic view of a laser tool with processing laser optics, in which a measuring instrument or an optics protection element can be inserted.
  • the exemplary embodiment explained below is a preferred embodiment of the invention.
  • the described components of the embodiment each represent individual features of the invention to be considered independently of one another, which also develop the invention independently of one another and are therefore also to be regarded as part of the invention individually or in a combination other than that shown.
  • the embodiment described can also be supplemented by further features of the invention already described.
  • a measuring instrument 1, a laser tool 2, a workpiece processing device 3 and a measuring method are described together below.
  • the figure shows a schematic view of the laser tool 2 with a processing laser optics 4 into which the measuring instrument 1 or an optics protection element 5 can be inserted.
  • the laser tool 2 is described, with the optics protection element 5 being inserted into the processing laser optics 4 .
  • the laser tool 2 is designed to project a processing laser beam 6 onto a workpiece 7 , a beam waist 8 of the processing laser beam 6 characterizing a processing point 9 of the laser tool 2 .
  • the beam waist 8 and the processing point 9 coincide.
  • a position of the beam waist 8 and consequently of the processing point 9 is decisively determined by the processing laser optics designated as a whole with the reference number 4 .
  • the processing laser optics 4 have at least two optical elements 10 on, for example, lenses, mirrors, etc. Using these optical elements 10, during operation of the laser tool 2, the laser light coupled into the processing laser optics 4 is converted using optophysical laws into the processing laser beam 6, i.e., for example, focused, refracted, deflected, reflected, etc., so that ultimately the position of the beam waist 8 and consequently the processing point 9 of the laser tool 2 results.
  • the processing laser optics 4 has a central optics axis 11 which forms a longitudinal central axis of the processing laser optics 4 , for example.
  • the optics center axis 11 or the longitudinal center axis of the processing laser optics 4 characterizes, for example, a beam path or beam path of the processing laser beam 6.
  • the laser light which is converted into the processing laser beam 6 by means of the processing laser optics 4, is coupled into the optical elements 10 of the processing laser optics 4 on an input side 12 of the processing laser optics 4 by means of a processing laser light source 13, so that it emerges as the processing laser beam 6 on an output side 14 of the processing laser optics 4 .
  • the processing laser light source 13 can be, for example, a laser diode and/or another laser light source, it being understood in particular that the processing laser light source 13 can be arranged at a distance from the processing laser optics 4, so that the processing laser light can be transmitted, for example, by means of a light guide element, for example a light guide cable. can be coupled into the processing laser optics 4 on the input side 12 .
  • the processing laser optics 4 and consequently the laser tool 2 also have the optics protection element 5, which protects the optics elements 10 from becoming soiled and/or damaged if, during laser processing of the workpiece 7, molten material of the same is sprayed or whirled up.
  • the optics protection element 5 which is in the form of a protective glass pane, for example, is inserted into the processing laser optics 4 , in particular coaxially in relation to the central axis 11 of the optics.
  • the laser tool 2 in particular the processing laser optics 4, has a receiving element 15, which corresponds to the optics protection element 5, with the optics protection element 5 forming a (first) insertion element 16, so that the optics protection element 5 or the first insertion element 16 and the receiving element 15 of the Laser tool 2 and the processing laser optics 4 are designed to form a holding device.
  • this holding device has the receiving element 15 and the first insertion element 16 inserted therein, that is to say the optics protection element 5 .
  • a frictional and/or positive connection is formed between the insertion element 16 and consequently the optics protection element 5 and the receiving element 15, whereby the optics protection element 5 as the first insertion element 16 is non-positive and/or positively held in the receiving element 15 of the processing laser optics 4 or can be held.
  • the positive and/or positive connection that acts or can be closed between the insertion element 16 and the receiving element 15 can be releasably reversibly non-destructively, so that the optics protection element 5, as the first insertion element 16, can be reversibly removed from the receiving element 15 and, consequently, non-destructively of the processing laser optics 4 can be removed.
  • the measuring instrument 1 has a housing 17 whose external shape 18 is designed in such a way that the measuring instrument 1 and the optics protection element 5 have the same external shape 18 , 19 .
  • the housing 17 of the measuring instrument 1 is designed in such a way that the outer shape 18 of the measuring instrument 1 and the outer shape 19 of the optics protection element 5 correspond to one another at least to the extent that the measuring instrument 1 can be inserted into the processing laser optics 4 instead of the optics protection element 5.
  • the housing 17 of the measuring instrument 1 has means for closing a non-positive and/or positive connection between the measuring instrument 1 and the receiving element 15 of the processing laser optics 4 .
  • a further (for example second) insertion element 20 for the receiving element 15 is formed by the measuring instrument 1 . Consequently, the measuring instrument 1 or the second insertion element 20 and the receiving element 15 of the laser tool 2 or the processing laser optics 4 are designed to form the holding device.
  • the holding device then has the receiving element 15 and—as an alternative to the optics protection element 5—the second insertion element 20 inserted therein, ie the measuring instrument 1 .
  • Measuring instrument 1 has a distance sensor 21, in particular laser triangulation sensor 22, by means of which a measuring laser beam 23 can be emitted or radiated, which can be aligned to measure a distance 24 on workpiece 7, in particular on a surface 25 of workpiece 7.
  • the laser triangulation sensor indicates this
  • the 22 or distance sensor 21 in the present example has a measuring laser light source 26 which is designed in particular differently from the processing laser light source 13 . Furthermore, the measuring instrument 1 has a mirror element 27 by means of which the measuring laser beam 23 is directed onto the workpiece 7 or onto the surface 25 of the workpiece 7 when the measuring instrument 1 is in operation. Under an impact of the measuring laser beam
  • both the measuring laser beam 23 and the reflection measuring laser beam 28 are each deflected by approximately 90 degrees by means of the mirror element 27, so that a particularly compact construction of the measuring instrument 1 is possible, for example if the laser triangulation sensor 22 is particularly high, in order to then mount it horizontally.
  • the distance 24 is measured particularly quickly and efficiently during a series production process, over which the laser tool 2, in particular the output side 14 of the laser tool 2 and the workpiece 7, in particular its surface 25, are spaced apart, according to the method for measuring the distance 24 to remove the optics protection element 5 or the first insertion element 16 on the laser tool 2, in particular from the processing laser optics 4. Then the measuring instrument 1 or the (second) insertion element 20 is to be inserted into the laser tool 2, in particular into the processing laser optics 4, by inserting the measuring instrument 1 into the receiving element 15 of the laser tool 2 or the processing laser optics 4. In other words, the optics protection element 5 is exchanged for the measuring instrument 1 in order to measure the distance 24 .
  • the processing laser beam 6 must be deactivated beforehand, for example by deactivating the processing laser light source 13 .
  • the laser tool 2 is thus described below, with the measuring instrument 1 being inserted into the processing laser optics 4 .
  • the measuring laser beam 23 is radiated onto the surface 25 of the workpiece 7 by means of the laser triangulation sensor 22 and by means of the mirror element 27, so that the measuring laser beam 23 is reflected by the surface 25 as the reflection measuring laser beam 28 to the laser triangulation sensor 22.
  • the reflection measuring laser beam 28 is deflected by means of the mirror element 27 in the present example. Since a geometric arrangement of the receiving element 15 in relation to an end 29 of the laser tool 2 facing the workpiece 7 is known, a geometric arrangement of the measuring instrument 1 inserted into the receiving element 15 in relation to the end 29 of the laser tool 2 is correspondingly known.
  • the method provides, for example, that the measuring instrument 1 is used to detect or measure a distance 30 over which the measuring instrument 1 and the surface 25 of the workpiece 7 are spaced apart.
  • the distance 24 can be determined by means of simple mathematical operations - which can be carried out in particular by a control unit or computing unit (not shown) of the measuring instrument 1 which the laser tool 2 and the workpiece 7 are spaced apart.
  • the distance 24 can be measured exactly in a particularly short measuring time, for example within a few seconds determine, so that it is particularly easy to determine in this way whether the beam waist 8 or the processing point 9 is arranged in the desired manner in relation to the workpiece 7 in order to ensure a particularly high or advantageous quality of the laser processing and consequently of the workpiece processed by means of the laser processing 7 to ensure.
  • the laser tool 2 or the workpiece processing device 3 having the laser tool 2 together with the measuring instrument 1 is calibrated when the laser tool 2 or the workpiece processing device 3 is put into operation, with the desired or ideal distance between the end 29 of the Laser tool 2 and the surface 25 of the workpiece 7 is set manually.
  • the measuring instrument 1 can then be adjusted, for example, in such a way that a deviation of the laser tool 2 and/or the workpiece 7 from this ideal distance is detected by means of the measuring instrument 1 by using the measuring instrument 1 to measure a larger or smaller distance than the ideal distance is measured or recorded.
  • the measuring instrument 1 also has an output unit 31 by means of which a distance value characterizing the distance 24 and/or the distance 30 can be provided.
  • the output unit 31 has a display 32, whereby the human operator of the laser tool 2 or the measuring instrument 1 can be provided with the distance value, for example in the form of text, in particular digits.
  • the output unit 31 has a data communication element 33 as an alternative or in addition to the display 32, by means of which the distance value can be made available in data form to the workpiece processing device 3, in particular the control device of the same.
  • the distance value characterizing the distance 24 is provided by the measuring instrument 1 via the data communication element 33 to the control device of the workpiece processing device 3 .
  • the control device of the workpiece processing device 3 is designed to accept the distance value as an input control signal, which means that an actuator 34 of the workpiece processing device 3 can be controlled by the control device based on the distance value.
  • the workpiece processing device 3 for the distance 24 to be set automatically or autonomously as soon as the measuring instrument 1 is inserted as intended into the receiving element 15 of the processing laser optics 4 or the laser tool 2 .
  • the workpiece processing device 3 has the laser tool 2 and consequently—if the measuring instrument 1 is inserted into the laser tool 2, the measuring instrument 1.
  • the workpiece processing device 3 is designed as a workpiece processing robot or at least has one.
  • the actuator 34 of the workpiece processing device 3 can be embodied, for example, as a robot actuator, with the laser tool 2 forming, for example, a distal end element of the workpiece processing robot or being arranged on this distal end element.
  • control device of the workpiece processing device 3 is designed as a robot control device, to which the distance value can be made available in data form, in particular by means of the data communication element 33 of the output unit 31, so that then - after the distance 24 has been recorded by means of the measuring instrument 1 - the robot control device Workpiece processing robot, that is, the actuator 34, controls accordingly for adjustment or readjustment.
  • the robot control device can influence robot programming, for example , by means of which the actuator 34 or robot actuator can be controlled or is controlled in order to adjust the distance 24 (again) in such a way that the processing point 9 of the laser tool 2 or the workpiece processing device 3 is or will be arranged as desired in relation to the workpiece 7.
  • the invention shows how the measuring instrument 1, the laser tool 2, the workpiece processing device 3 and/or the method for measuring the distance 24 can be used to measure this particularly efficiently, in particular without having to interrupt a series production process or series machining process for a particularly long time, which is disadvantageous have to. Because the measuring instrument 1 can be inserted into the receiving element 15 of the processing laser optics 4 as intended, a particularly long and disadvantageous set-up time for the laser tool 2 in order to convert it to measure the distance 24 is eliminated. Instead, the optics protection element 5 or the protective glass pane is removed particularly efficiently from the receiving element 15, i.e. from the processing laser optics 4, in a simple manner, after which the measuring instrument 1 can be inserted into the receiving element 15, i.e.
  • the measuring instrument 1 is particularly inexpensive, since it is particularly inexpensive compared to conventional measuring systems (which can cost several tens of thousands of euros), in particular it costs less than one thousand euros. This results in an economically particularly favorable measuring method, which contributes to a particularly high and in particular constant quality of workpieces 7 .
  • the distance 24 at which the laser tool 2 and the surface 25 of the workpiece 7 are spaced apart from one another can be determined particularly precisely by directing the measuring laser beam 23 along the beam path of the processing laser beam 6, for example along the central optics axis 11, onto the surface 25 of the workpiece 7 is projected.
  • the distance 24 is measured or recorded directly at the processing point 9 , which is preferable to recording the distance 24 away from the processing point 9 .

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Laser Beam Processing (AREA)

Abstract

L'invention concerne un instrument de mesure (1, 20) conçu pour un outil laser (2), qui permet de mesurer une distance (30) entre l'instrument de mesure (1, 20) et un objet (7), comprenant : un capteur à triangulation laser (21, 22) au moyen duquel un faisceau laser de mesure (23) peut être émis sur l'objet (7, 25), ledit faisceau laser pouvant être réfléchi au moyen de l'objet (7, 25) en tant que faisceau laser de mesure de réflexion (28) par impact sur l'objet (7, 25) et peut être reçu par le capteur à triangulation laser (21, 22) ; et comprenant un logement (17) dans lequel se situe le capteur à triangulation laser (21, 22). Selon l'invention, le logement (17) présente une forme externe (18) qui correspond à une forme externe (19) d'un élément de protection optique (5, 16) d'un système optique d'usinage laser (4) de l'outil laser (2) ; le logement (17) et ainsi l'instrument de mesure (1, 20) pouvant être insérés dans l'outil laser (2). L'invention concerne également un outil laser (2) équipé dudit instrument de mesure (1, 20), un dispositif d'usinage de pièce (3), en particulier un robot d'usinage de pièce, et un procédé pour mesurer une distance (24).
PCT/EP2021/075063 2020-09-15 2021-09-13 Instrument de mesure pour outil laser, outil laser et dispositif d'usinage de pièce et procédé pour mesurer une distance WO2022058270A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202180062988.2A CN116113515A (zh) 2020-09-15 2021-09-13 用于激光工具的测量仪器、激光工具和工件加工设备以及用于测量距离的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020211533.8 2020-09-15
DE102020211533.8A DE102020211533B3 (de) 2020-09-15 2020-09-15 Messinstrument für ein Laserwerkzeug, Laserwerkzeug und Werkstückbearbeitungsvorrichtung sowie Verfahren zum Messen eines Abstands

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DE102011121697A1 (de) * 2011-12-16 2013-06-20 Precitec Kg Laserbearbeitungsvorrichtung zur Bearbeitung eines Werkstücks mittels eines Laserstrahls
DE102014113283A1 (de) * 2014-09-15 2016-03-17 Blackbird Robotersysteme Gmbh Vorrichtung zur Remote-Laserbearbeitung mit Sensor-Scannereinrichtung
DE102015107556B3 (de) * 2015-05-13 2016-09-01 Precitec Gmbh & Co. Kg Kassettenmodul zur Halterung eines optischen Elements in einer Laserbearbeitungsanlage
DE102016122830A1 (de) * 2016-11-25 2018-05-30 NoKra Optische Prüftechnik und Automation GmbH Verfahren und Anordnung zur Abstandsmessung
US20190015931A1 (en) 2017-07-14 2019-01-17 Precitec Gmbh & Co. Kg Method and device for measuring and controlling a distance between a machining head and a workpiece

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DE102015200263A1 (de) 2015-01-12 2016-07-14 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Verfahren zum Aktualisieren von Daten einer Materialbearbeitungsmaschine sowie zugehörige Materialbearbeitungsmaschine und austauschbare Maschinenkomponente
DE102015115803A1 (de) 2015-09-18 2017-03-23 Precitec Gmbh & Co. Kg Verfahren zum Führen eines Bearbeitungskopfes entlang einer zu bearbeitenden Spur

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DE102011121697A1 (de) * 2011-12-16 2013-06-20 Precitec Kg Laserbearbeitungsvorrichtung zur Bearbeitung eines Werkstücks mittels eines Laserstrahls
DE102014113283A1 (de) * 2014-09-15 2016-03-17 Blackbird Robotersysteme Gmbh Vorrichtung zur Remote-Laserbearbeitung mit Sensor-Scannereinrichtung
DE102015107556B3 (de) * 2015-05-13 2016-09-01 Precitec Gmbh & Co. Kg Kassettenmodul zur Halterung eines optischen Elements in einer Laserbearbeitungsanlage
DE102016122830A1 (de) * 2016-11-25 2018-05-30 NoKra Optische Prüftechnik und Automation GmbH Verfahren und Anordnung zur Abstandsmessung
US20190015931A1 (en) 2017-07-14 2019-01-17 Precitec Gmbh & Co. Kg Method and device for measuring and controlling a distance between a machining head and a workpiece

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CN116113515A (zh) 2023-05-12

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