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WO2025219348A1 - Procédé d'inspection de machine et système pour mettre en œuvre un procédé d'inspection de machine - Google Patents

Procédé d'inspection de machine et système pour mettre en œuvre un procédé d'inspection de machine

Info

Publication number
WO2025219348A1
WO2025219348A1 PCT/EP2025/060286 EP2025060286W WO2025219348A1 WO 2025219348 A1 WO2025219348 A1 WO 2025219348A1 EP 2025060286 W EP2025060286 W EP 2025060286W WO 2025219348 A1 WO2025219348 A1 WO 2025219348A1
Authority
WO
WIPO (PCT)
Prior art keywords
machine
processing
machining
image
state
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2025/060286
Other languages
German (de)
English (en)
Inventor
Patrick Wowtscherk
Niclas Sjödin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trumpf Werkzeugmaschinen SE and Co KG
Original Assignee
Trumpf Werkzeugmaschinen SE and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Trumpf Werkzeugmaschinen SE and Co KG filed Critical Trumpf Werkzeugmaschinen SE and Co KG
Publication of WO2025219348A1 publication Critical patent/WO2025219348A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/24—Pc safety
    • G05B2219/24097—Camera monitors controlled machine
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/36—Nc in input of data, input key till input tape
    • G05B2219/36199—Laser cutting

Definitions

  • the invention relates to a machine inspection method for performing inspections on a processing machine for machining workpieces, in particular a laser and/or punching machine, using a camera attached to a machining head of the processing machine. Furthermore, the invention relates to a system for performing a machine inspection method.
  • the object of the invention is to further develop the state of the art.
  • a machine inspection method for carrying out checks on a processing machine, in particular on a laser and/or punching processing machine, for processing workpieces
  • the processing machine has a plurality of machine units
  • the processing machine has a movable processing head, wherein a camera is attached to the processing head, wherein a first image of a first machine unit of the plurality of machine units is created with the camera, wherein a first state of the first machine unit is determined based on the first image, wherein the first state is compared with at least one first prerequisite for a first machine processing program, in particular a laser cutting and/or punching processing program, wherein the first machine processing program is executed if fulfillment of the first prerequisite is detected by the first state.
  • the first prerequisite can comprise prerequisites for several of the plurality of machine units.
  • Such requirements include, for example, proper setup of tools required for machining.
  • Such requirements also include, for example, a machining space between a tool and a workpiece to be machined that should be free of any foreign bodies, such as reject elements on a raw material to be machined, which typically arise in a separating machining process.
  • Such requirements can include correct machine settings in order to achieve a quality requirement to be met, for example, sufficient cleanliness and/or flatness of a support of the raw material to be machined.
  • such requirements can also include correct parameter selection in order to achieve a quality requirement to be met, such as sufficient cutting quality for a cut workpiece contour.
  • the camera attached to the machining head of the processing machine can record the various states at different points on the processing machine. Consequently, only one camera is required for states on multiple machine units.
  • the comparison can therefore also be automated and does not have to be performed manually. If the state deviates from the prerequisite, the machining program is not executed, thus avoiding errors in the execution of the machining program and the resulting incorrect machining of the workpiece or damage to the processing machine. Only if the If the condition is met, the machining program is executed.
  • a machine operator is notified via a user output when the first requirement of the first state is not met. This allows the machine operator to react to the deviation and establish a state that meets the requirement or load a machining program with different requirements.
  • the image quality of the first image in particular an image quality insufficient for determining the first state, is determined, wherein at least one movement of the processing head is performed and at least one second image of the first machine unit is captured with the camera in at least one further recording perspective if the image quality of the first image is insufficient for determining the first state, wherein the first state of the first machine unit is determined based on the second image.
  • Production conditions such as light reflections or contamination, often complicate sensor-based, in particular camera-based, recordings.
  • the sensor values themselves, in particular camera recordings can already have a quality insufficient for the necessary recording.
  • the disclosed method solves this problem in that the camera attached to the processing head of the processing machine can perform at least one further recording of the machine unit by moving the processing head into at least one further recording perspective.
  • the second image can be used instead of the first image to determine the first state.
  • the second image can be used in combination with the first image to determine the first state.
  • At least one machine unit of the plurality of machine units consists of a magazine with a plurality of machining head tools, in particular machining head tools in the form of nozzles for laser processing or punching heads for punching, wherein each of the machining head tools is inserted in the magazine at a fixed magazine position, wherein the first requirement of the first machine processing program comprises the presence of a predetermined machining head tool, wherein the existing machining head tools are detected as a first state, wherein the machining head tools have an identification coding, in particular in the form of a QR code, a barcode and/or an identification number, wherein the identification codings can be read with the camera are recorded and the first state is determined from the recorded identification codes.
  • Tools are a fundamental machine unit of a processing machine. Such tools are typically attached to the processing head of the processing machine. Examples include processing head tools in the form of nozzles for laser processing or punching heads for punching. Such processing head tools are typically interchangeable, and several processing head tools are stored in a magazine in a specific magazine position. If the machine processing program requires at least one processing head tool, information about this can be stored in a machine control system. By moving the processing head, the camera can capture an identification code for a respective processing head tool in a specific magazine position. Information about the captured processing head tool can be passed on to the machine control system. In other words, the method enables mechanical and automated identification of processing head tools in specific magazine positions.
  • the method can be used to compare the identified machining head tools with the required machining head tools from the first machining program before its execution, whereby a machining head tool required for the first machining program is identified as missing in the magazine and/or a machining head tool is identified in the magazine that is not required for the first machining program.
  • the method thus enables mechanical and automated identification of missing or incorrectly inserted machining head tools.
  • the magazine position of the predetermined machining head tool is determined, wherein the magazine position of the predetermined machining head tool is taken into account during the execution of the first machining program, in particular during an automatic exchange process of the machining head tool.
  • the machining program can be adapted to the magazine position. It is therefore not necessary for the predetermined machining head tool to be located at a predetermined magazine position. If the machining machine has a function For an automatic machining head tool change process, the information about the magazine positions can be passed on to the automatic tool change function. In other words, the method enables mechanical and automated identification and subsequent replacement of machining head tools.
  • the first state is compared with a first prerequisite of a plurality of machining programs, whereby only those machining programs are executed whose first prerequisite is met by the first state.
  • This embodiment is particularly advantageous for a production plan consisting of a plurality of machining programs and stored in a machine control system.
  • manual operator intervention in the processing machine is detected, and after the operator intervention has been completed, the process steps of the machine inspection process are carried out again.
  • detection can be carried out, for example, by sensors in the entrance area of a magazine, for example, by optical sensors in the form of light barriers.
  • a renewed identification of all machining head tools inserted in the magazine and a comparison with the required machining head tools from the machine processing program or from the machine processing programs of the production plan can be carried out.
  • the previously described process steps for identifying missing or incorrectly inserted machining head tools and/or issuing an error message about them and/or comparing them with a production plan can then be initiated again after the operator intervention.
  • the first requirement comprises a working area of the processing machine that is free of foreign objects, wherein the first image of the working area of the processing machine is created by means of the camera before and/or during the execution of the first machining program, wherein, based on the first image, the first status is determined as to whether a foreign object is in the working area.
  • a foreign object can, for example, be a reject element.
  • reject elements A recurring problem in the processing of workpieces with processing machines is reject elements, which often inevitably arise, especially in separating process steps such as laser cutting or punching. In this case, it is often not possible to prevent reject elements from forming in the Processing space between a tool and the workpiece to be machined.
  • reject elements in the form of punched or cut-out inner contour parts can remain on a raw material sheet during laser cutting or punching if they were not correctly ejected due to an error. If these reject elements are located on a planned punching or cutting contour, the parameters planned by the machining program for this punching or cutting contour will lead to a different and possibly undesirable result or undesirable quality.
  • the disclosed method solves this problem in that, for the machining program to be carried out in a working area of the machine, in particular for laser cutting and/or punching, partial profiles to be traversed for this purpose, in particular laser cutting contours and/or punching forming areas, are detected by a movement of the machining head before and/or during and/or after partial profile machining by means of the camera attached to it, wherein reject elements already located on these partial profiles and/or reject elements arising during workpiece machining are detected and information about this is transmitted to the machine control system.
  • Information about the detected foreign object can be output to a user via a user output. This allows the user to react to the foreign object in the work area and initiate appropriate measures. Furthermore, a detected foreign object can trigger a stop of the processing machine.
  • the first machine program can be adjusted. Based on the location of the detected foreign object, a machining operation at this location can be omitted. In other words, a part of the first machine machining program is skipped. This, in particular, prevents a collision with the foreign object.
  • Information about the omitted machining operation can be transmitted to a higher-level production planning system. For example, a workpiece part to be separated, which is planned in the machine machining program, can be omitted, and information about this can be transmitted to a higher-level production planning system, wherein a subsequent machine machining program is expanded by the production planning system to include a new loading of the omitted workpiece part.
  • the invention enables automated rescheduling of a machining operation disrupted by a foreign object. Processing. This is particularly advantageous when a processing machine is operated unmanned for an extended period, for example, during a night shift.
  • the first requirement comprises the correct ejection of a material part, in particular a remnant or a workpiece part, separated from a raw material to be processed, in particular a sheet metal panel, during the execution of the first machining program.
  • An image of the material part is created using the camera, and based on the image, it is determined as a first status whether the correct ejection has occurred.
  • the function of an automated ejection can, for example, comprise the targeted collection of remnants or separated workpiece parts at a specific location, such as in a storage box located beneath the work area.
  • the first status is determined by a comparison with an additional sensor system for detecting correct ejection.
  • the method can be used to further detect the correct ejection and/or incorrect ejection and/or jamming using the camera located on the processing head and to perform a comparison with the additional sensor system, for example, initiated by the additional sensor system detecting unclear or faulty states.
  • a combination of the detection by the camera attached to the processing head and the detection by the additional sensor system can be combined to create an overall detection with higher overall quality.
  • the processing machine comprises a processing support, in particular a sheet metal support grid
  • the first prerequisite comprises a state of the processing support, in particular a slag build-up, wherein a first image of the processing support is created with the first camera and, based on the image, the state of the processing support is determined as the first status.
  • the state of the processing support can, for example, be sufficient cleanliness and/or flatness. After a longer period of time, processing residues or other process materials can accumulate on such processing supports. If the amount of accumulation exceeds a critical value, this can influence the quality of the workpiece processing.
  • this target state of the processing support is undershot, the method can inform the user about this via the user output.
  • the process can trigger a stop of the processing machine if the target state of the processing requirement is undershot.
  • a plurality of workpiece parts are machined during the execution of the first machining program, wherein the first prerequisite is a target quality of a first workpiece part.
  • the first prerequisite is a target quality of a first workpiece part.
  • an actual quality of the first workpiece part is recorded as the first state.
  • the cutting edge quality can include properties such as roughness, discoloration, and/or burr formation. If the actual quality falls below the target quality, information about this can be transmitted to the user via the user output.
  • the processing machine can be stopped.
  • a system for carrying out a machine inspection method comprising a processing machine for processing workpieces, in particular a laser and/or punching processing machine, and a computer unit, wherein the processing machine comprises a processing head and a camera is attached to a processing head of the processing machine, wherein the computer unit is configured to carry out a machine inspection method.
  • Fig.1 A system for carrying out a machine inspection method
  • FIG. 1 another system for carrying out a machine inspection procedure.
  • Fig. 1 shows a system for carrying out a machine inspection method.
  • the system comprises a processing machine 1, in this case a laser cutting machine.
  • the processing machine 1 is configured to process a workpiece 9, in this case a sheet metal panel.
  • the machine tool 1 comprises a movable machining head 4, in this case a laser cutting head.
  • a camera 3 is attached to the machining head 4.
  • the machining machine 1 comprises a plurality of machine units 2, in this case a magazine 2a, wherein the magazine has six magazine positions 2c, wherein one magazine position 2c is empty and the other five magazine positions 2c are filled with several machining head tools 2b, and a machining support 2d. By moving the machining head 4, the camera 3 can be aligned with the individual machine units 2.
  • the camera 3 can be aligned with the machining support 2d or with the magazine 2a, with the magazine positions 2c and the machining heads 2b.
  • a first image 5 of the machine unit 2 can be created using the camera 3.
  • the system comprises a computing unit 7, wherein the computing unit 7 is communicatively connected to the camera 3.
  • the computing unit 7 is a computer connected to the processing machine 1.
  • the computing unit 7 can also be part of the processing machine 1.
  • the camera 3 transmits the first image 5 to the computing unit 7.
  • a first machining program 6 and a first prerequisite are stored in the computing unit 7. In this example, the machining program 6 contains the first prerequisite.
  • the computing unit 7 determines a first state of the machine unit 2 from the first image 5 and compares the first state with the first prerequisite of the first machining program 6. If the first state fulfills the first prerequisite, the machining program 6 is executed by the processing machine 1. The computing unit 7 is connected to a user output 8. If the first state does not fulfill the first prerequisite, the first machining program 6 is not executed, and information is output via the user output 8 so that a machine operator can react to the faulty state of the machine unit.
  • the computing unit 7 checks whether the image quality of the first image 5 is sufficient to determine the first state. For example, the first image 5 may have insufficient image quality due to light reflection or contamination of the optics of the camera 3. If the first image 5 has insufficient image quality, the processing head 4 is moved so that the camera 3 views the first machine unit 2 from a different angle and creates a second image of the first machine unit 2. The state of the first machine unit 2 is then determined based on the second image. By moving the machining head 4, the camera 3 can be aligned with the magazine 2a. Using the camera 3, an image 5 of the magazine 2a with the magazine positions 2c and the machining head tools 2b located therein is then created.
  • the image 5 is transmitted to the computing unit 7, and the computing unit uses the image 5 to determine which magazine positions 2c are empty and which magazine positions 2c contain a machining head tool 2b.
  • the machining head tools 2b each have an identification code. Based on the identification code, the computing unit 7 determines which machining head tools 2b are present at which magazine positions 2c of the magazine 2a. The computing unit 7 compares the existing machining head tools 2b with the machining head tool assumed in the first machining program 6. If the assumed machining head tool is present in the magazine, the first machining program 6 is executed. If the required machining head tool is not present in the magazine, the first machining program 6 is not executed and information is output to the machine operator via the user output 8.
  • the magazine position 2c of the required machining head tool 2b is taken into account when executing the machining program 6.
  • the magazine position 2c can be taken into account when executing the machining program 6.
  • the computing unit 7 can compare the state of the first machine unit 2 with the respective first requirements of the machining programs 6. Then, the machining programs 6 whose requirements are met by the state of the first machine unit 2 are executed.
  • the camera 3 By further moving the machining head 4, the camera 3 is aligned with the machining support 2d. Using the camera 3, an image 5 of the machining support 2d is then created. The image 5 is transmitted to the computing unit 7, and the computing unit determines from the image 5 whether the state of the machining support 2d fulfills the requirements of the machining program 6. If the state of the machining support 2d fulfills the requirements, the first machining program 6 is executed. If the state of the machining support 2d does not fulfill the requirements, the first machining program 6 not executed and information is output to the machine operator via user output 8.
  • the first prerequisite of the machining program 6 can be a required machining head tool, several required machining head tools, a required state of the machining support or any combination thereof.
  • Figure 2 shows another system for executing a machine inspection method. Only the differences from Figure 1 are described below.
  • the computing unit 7 is part of the processing machine 1.
  • the user output 8 is part of the processing machine 1.
  • the camera 3 By moving the processing head 4, the camera 3 can be aligned with a severed material part 10 or the remaining defect in the workpiece 9. The camera 3 then creates an image 5 of the severed material part 10 and/or the defect in the workpiece 9. The image 5 is transmitted to the computing unit 7, and the computing unit determines from the image 5 whether the severed material part 10 was correctly ejected. In an embodiment not shown, correct ejection can also be checked by further sensors, e.g., a light grid below the workpiece 9. The computing unit 7 compares the state of the severed material part 10 with the prerequisite of the first machining program 6. If the severed material part 10 has been correctly ejected, the first machining program 6 is executed. If the separated material part 10 is not correctly ejected, the first machine processing program 6 is not executed and information is output to the machine operator via the user output 8.
  • the camera 3 By moving the machining head 4, the camera 3 can be aligned to different points on the workpiece 9. Images 5 of the workpiece 9 are then created using the camera 3. The images 5 are transmitted to the computing unit 7, and the computing unit determines from the images 5 whether a foreign object 11 is on the workpiece. The computing unit 7 compares the condition of the workpiece 9 with the prerequisite of the first machining program 6. If the workpiece 9 is free of foreign objects 11 that would interfere with the execution of the first machining program 6, the first machining program 6 is executed. If the computing unit 7 detects interfering foreign objects 11 on the workpiece 9, the first Machine processing program 6 is not executed and information is output to the machine operator via user output 8.

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  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Machine Tool Sensing Apparatuses (AREA)

Abstract

L'invention concerne un procédé d'inspection de machine pour effectuer des vérifications sur un outil d'usinage (1), en particulier sur un outil d'usinage au laser et/ou de poinçonnage, pour usiner des pièces à usiner (9), dans lequel l'outil d'usinage (1) comporte une pluralité d'unités de machine (2) ; l'outil d'usinage (1) comporte une tête d'usinage mobile (3) ; une caméra (4) est fixée à la tête d'usinage (3) ; une première image (5) d'une première unité de machine (2) de la pluralité d'unités de machine (2) est générée au moyen de la caméra (4) ; sur la base de la première image (5), un premier état de la première unité de machine (2) est déterminé ; le premier état est comparé à au moins une première condition préalable pour un premier programme d'usinage (6), en particulier un programme d'usinage de découpe au laser et/ou de poinçonnage ; et le premier programme d'usinage (6) est exécuté lorsqu'il est reconnu que le premier état satisfait la première condition préalable.
PCT/EP2025/060286 2024-04-15 2025-04-14 Procédé d'inspection de machine et système pour mettre en œuvre un procédé d'inspection de machine Pending WO2025219348A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102024110465.1 2024-04-15
DE102024110465.1A DE102024110465A1 (de) 2024-04-15 2024-04-15 Maschineninspektionsverfahren und System zur Durchführung eines Maschineninspektionsverfahrens

Publications (1)

Publication Number Publication Date
WO2025219348A1 true WO2025219348A1 (fr) 2025-10-23

Family

ID=95450273

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2025/060286 Pending WO2025219348A1 (fr) 2024-04-15 2025-04-14 Procédé d'inspection de machine et système pour mettre en œuvre un procédé d'inspection de machine

Country Status (2)

Country Link
DE (1) DE102024110465A1 (fr)
WO (1) WO2025219348A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011003717A1 (de) * 2011-02-07 2012-08-09 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Vorrichtung und Verfahren zur Überwachung und insbesondere zur Regelung eines Laserschneidprozesses
EP2540432A1 (fr) * 2011-06-27 2013-01-02 Trumpf Maschinen AG Machine de traitement au laser dotée de composants échangeables et son procédé d'utilisation
WO2019238344A1 (fr) * 2018-06-11 2019-12-19 Siemens Aktiengesellschaft Vérification d'une situation de traitement avant l'exécution du traitement
US20200331095A1 (en) 2016-11-25 2020-10-22 Glowforge Inc. Engraving in a computer numerically controlled machine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019125951A1 (de) * 2019-09-26 2021-04-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zur Bahngenauigkeitsbestimmung einer stationären Bearbeitungsmaschine
DE202021104688U1 (de) * 2021-09-01 2022-12-02 Starrag Gmbh Vorrichtung zur Prozessüberwachung in einer Werkzeugmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011003717A1 (de) * 2011-02-07 2012-08-09 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Vorrichtung und Verfahren zur Überwachung und insbesondere zur Regelung eines Laserschneidprozesses
EP2540432A1 (fr) * 2011-06-27 2013-01-02 Trumpf Maschinen AG Machine de traitement au laser dotée de composants échangeables et son procédé d'utilisation
US20200331095A1 (en) 2016-11-25 2020-10-22 Glowforge Inc. Engraving in a computer numerically controlled machine
WO2019238344A1 (fr) * 2018-06-11 2019-12-19 Siemens Aktiengesellschaft Vérification d'une situation de traitement avant l'exécution du traitement

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