Computer-aided monitoring method and monitoring system

Abstract

The invention relates to a computer-aided monitoring method (10) for a manufacturing process performed using a laser processing machine (12), having the method steps of: a) continuously providing (14) manufacturing recordings (16) of a manufacturing area (18) of the laser processing machine (12); b) comparing (28) the manufacturing recordings (16) with predetermined monitoring events (30) in order to determine at least one actual fault event (32); c) determining (38) an event location (40) for the determined actual fault event (32) in the manufacturing area (18) of the laser processing machine (12); d) determining (44) at least one visual event recording (46) of the event location (40) from the manufacturing recordings (16); e) visually outputting (48) a monitoring report (50), wherein the monitoring report (50) comprises at least the fault event (32), the event location (40) and an event recording (46) at the time at which the fault event (32) occurs. The invention additionally relates to a monitoring system (54).

Description

[0001] Computer-aided monitoring procedure and monitoring system

[0002] Background of the invention

[0003] The invention relates to a computer-aided monitoring method for a manufacturing process using a laser processing machine. The invention also relates to a monitoring system.

[0004] Such methods are used to monitor manufacturing processes in order to detect errors that occur during production more quickly and to avoid financial losses due to downtime of the laser processing machine as well as damage to the laser processing machine due to incorrect processing and / or collisions.

[0005] Conventional methods detect deviations in the laser processing machine's production process and typically issue an error message indicating the deviation. However, the error message is usually issued in text form, which means that no further information about the error itself or the cause of the error can be provided to the operator. Therefore, the error message usually refers to the error result, for example, a collision between the laser processing machine and a workpiece, but not to the cause, in this case, the collision.

[0006] As a result, often only the error result can be corrected, meaning that a recurrence of the error cannot be ruled out. This results in repeated downtimes on the laser processing machine due to the same error cause. If the operator is required to locate the cause of the error message on the laser processing machine, this leads to considerable maintenance effort and extended downtimes for the laser processing machine.

[0007] Furthermore, manufacturing processes using laser processing machines are increasingly automated, and the laser processing machines are often controlled and maintained remotely. This limits or even eliminates direct visual access to the laser processing machine and the potential fault, making it even more difficult to determine the cause of the fault.

[0008] WO 2020 / 078683 A1 discloses a method for visualizing process information during the production of sheet metal components. The method is used to support the sorting process, whereby recorded workpiece image data of manufactured workpieces are visually output together with associated manufacturing process information to facilitate sorting for the operator. However, the described method is unsuitable for monitoring the manufacturing process itself.

[0009] EP 1 642 366 B1 discloses a laser welding process control system and method for real-time monitoring of weld seam quality during the creation of a weld seam. In the event of deviations in weld quality, operator interventions in the welding process are enabled and error flags are generated.

[0010] US 2015 / 0001196 A1 discloses a device for monitoring a laser weld bead, in which weld defects are detected using an image signal reflected from the weld bead surface. The detected weld defects can then be identified more precisely and / or require intervention in the welding process. The aforementioned prior art therefore cannot meet the required requirements for rapid defect detection combined with rapid and targeted elimination of the cause of the defect.

[0011] The object of the invention is to enable rapid and targeted detection and elimination of errors during the manufacturing process using a laser processing machine.

[0012] Description of the invention

[0013] This object is achieved according to the invention by a computer-aided monitoring method having the features of claim 1. Furthermore, the object is achieved by a monitoring system having the features of claim 8. The subclaims represent preferred embodiments of the invention.

[0014] According to the invention, a computer-assisted monitoring method is proposed. The monitoring method is thus carried out using at least one computer.

[0015] The monitoring method is particularly suitable for monitoring a manufacturing process that is carried out using a laser processing machine.

[0016] The monitoring procedure includes at least the following procedural steps:

[0017] In a method step a), a continuous provision of production records of a production area of ​​the laser processing machine is provided.

[0018] Production records are understood to mean, both before and after, visual, production-related, and / or sensory recordings of the production area of ​​the laser processing machine. For example, but not limited to, visual production records are understood to mean photographs and / or video recordings. Further, for example, but not limited to, sensory production records are understood to mean measured values ​​from various sensors, in particular sensors of the laser processing machine and / or data logs of the laser processing machine during the production process. Further, for example, production-related production plans, production parameters, etc., can be understood as production records.

[0019] Continuous provisioning means provision at regular intervals. Provisioning preferably occurs at intervals of less than 1 second, particularly preferably at intervals of less than 0.1 seconds, throughout the entire manufacturing process.

[0020] The production records are typically provided by the laser processing machine and / or by additional measuring and recording means, in particular by a monitoring system as described above and below.

[0021] Preferably, a large number of production records are provided. This allows for particularly comprehensive monitoring of the production area and the production process, and potential errors can be detected at an early stage.

[0022] In a subsequent step b) of the monitoring method, the production records are compared with predetermined monitoring events. This comparison can be used to determine an actual fault event. The fault event is preferably determined before the occurrence of possible consequential damage caused by the fault event itself. Preferably, the production records are compared with a plurality of predetermined monitoring events.

[0023] A fault event can be understood as a deviation from a predetermined production process that can lead to a deterioration in process quality and / or damage to the laser processing machine, the environment, and / or the workpieces being manufactured. A typical fault event is the tilting of a finished workpiece, which can create a risk of collision between the workpiece and moving machine parts of the laser processing machine. Another typical fault event is increased process glow caused by inadequate adaptation of the production parameters to the workpiece being processed.

[0024] Predetermined monitoring events are production records from previous manufacturing processes that led to the occurrence of a fault event. By comparing the predetermined monitoring events with the provided production records, it can be concluded, if there is sufficient agreement, that a fault event has occurred for the monitored manufacturing process.

[0025] A deviation from the production process can thus be identified by comparing the production records with production records that are typical for error events. For example, if the production records show a high degree of similarity with production records in which an error event has occurred, it can be concluded that the error event is about to occur.

[0026] In a further step c) of the monitoring method, the location of the detected actual error event in the production area of ​​the laser processing machine is determined. In other words, the position of the error event in the production area of ​​the laser processing machine is determined, which facilitates targeted remediation of the error event.

[0027] The location of the event can be determined by evaluating the coordinates associated with the production record containing the deviation. For example, the position coordinates of a processing head of the laser processing machine can be used to determine the position of the error event in the case of increased process brightness.

[0028] A method step d) of the monitoring method involves determining at least one visual event recording of the event location from the production records. In other words, a recording of the production area is determined in which the fault event is visually recognizable.

[0029] In a method step e) of the monitoring method, a monitoring report is visually output, wherein the monitoring report includes at least the monitoring event, the event location, and an event recording at the time the monitoring event occurred. In other words, according to the invention, in addition to an error message, additional visual information about the error event is output. This allows an operator to quickly and effectively resolve the error event and its cause.

[0030] In summary, the invention proposes a monitoring method that, in addition to outputting an error message, provides additional automatically generated visual information about the error itself and the cause of the error. This enables the operator's attention to be drawn directly to the cause of the error event, which would otherwise be difficult or impossible to access. Such a meaningful error description enables targeted rectification of the error and its cause. Downtime of the laser processing machine and maintenance effort are minimized. From a multitude of production records, the information required to rectify the error event is automatically selected and displayed, appropriate to the error situation.

[0031] In a preferred embodiment of the monitoring method, method step c) provides for the event location to be determined by evaluating the area coordinates of the laser processing machine's production area stored in the production records. In other words, each production record is assigned unique area coordinates within the laser processing machine's production area. For example, it may be provided that an imaging device is adjusted and aligned to record a predetermined sub-area of ​​the production area.

[0032] Furthermore, an embodiment of the monitoring method is preferred in which at least one actual error event is determined by issuing an error message from the laser processing machine. In other words, an error message generated by the laser processing machine can be further processed by the monitoring method, thereby providing additional information about the cause of the error. This allows laser processing machines to be effectively incorporated into the monitoring method, further improving the monitoring quality.

[0033] The error message from the laser processing machine can be determined, for example, by detecting a process deviation using the laser processing machine's sensors. Furthermore, increased process glow can be detected as a result of an unfavorable setting of the process parameters. The error message from the laser processing machine typically contains the area coordinates of the laser processing machine's processing head, which can provide the location of the event as well as a visual recording of the process glow.

[0034] In a preferred embodiment of the monitoring method, the at least one visual event recording is determined depending on the recording orientation relative to the event location. In particular, when determining the visual event recording, obscuring of the event location by moving machine parts of the laser processing machine can be taken into account. Determining the visual event recording can alternatively or additionally be carried out depending on the distance of a recording device from the event location, with particular preference being given to production recordings recorded by a recording device located close to the event location. Further preferred is an embodiment of the monitoring method in which visual production recordings of the entire production area are provided in method step a).By visually recording the entire production area, particularly comprehensive and complete monitoring of the production process can be ensured.

[0035] In a preferred embodiment of the monitoring method, at least 3, preferably at least 6, particularly preferably at least 12, different visual production records of the production area are provided. Different production records typically refer to records made by different recording devices. The inventors have recognized that the previously described number of different visual production records represents a good balance in terms of monitoring accuracy and process costs.

[0036] In a preferred development of the monitoring method, the provided visual production records are recorded from at least three different recording directions onto the production area. Typically, the production records are recorded by different orientations of the recording devices onto the production area. Preferably, the recording devices are arranged at equal intervals around the production area. This allows for particularly comprehensive recording of the production area, taking moving machine parts into account.

[0037] The underlying task is further solved by a monitoring system.

[0038] The monitoring system is configured and designed for use in a monitoring method described above and below. The monitoring system has an evaluation unit. The evaluation unit is preferably designed as a computer or as part of a computer.

[0039] The evaluation unit is configured to receive the provided production records described above and below. In other words, the evaluation unit can be configured to receive different file formats via different transmission means.

[0040] The evaluation unit is also designed to compare at least one predetermined monitoring event with the provided production records and to determine an error event. Typically, a comparison is performed using algorithms, particularly self-learning ones, which allows for a particularly fast comparison with a large number of monitoring events.

[0041] The evaluation unit is further configured to determine an event recording of the event location for a detected error event.

[0042] The monitoring system also has an output unit for outputting a monitoring report. The output unit is typically designed for visual output of the monitoring report. The output unit can be designed as a mobile display, in particular as a smartphone.

[0043] In a preferred embodiment, the monitoring system comprises at least one visual recording device for providing at least one visual production record of the production area of ​​the laser processing machine. This allows an area of ​​the production area to be monitored to be determined independently of the laser processing machine, thereby further increasing monitoring accuracy. Typically, the at least one visual recording device is embodied as a camera. Further preferred is an embodiment in which the monitoring system has two or more visual recording devices for providing two or more visual production records. The recording devices have different recording orientations with respect to the production area.This ensures particularly complete monitoring of the production area regardless of the positions of the moving machine parts of the laser processing machine.

[0044] In a preferred embodiment, the monitoring system further comprises a monitoring sensor system, wherein the monitoring sensor system is designed to provide production records. The monitoring sensor system preferably comprises the machine sensors of the laser processing machine. This allows the monitoring system to be cost-effectively expanded with production records, in particular machine logs, of the laser processing machine, and the monitoring quality can be further increased.

[0045] In one embodiment of the monitoring system, the output unit is designed as a display of the machine control system of the laser processing machine. This allows for cost-effective output directly at the laser processing machine.

[0046] Further preferred is an embodiment of the monitoring system in which the evaluation unit is designed to evaluate production records from two or more production areas of two or more laser processing machines. This allows the evaluation device to be used centrally to monitor multiple laser processing machines, thereby reducing monitoring costs.

[0047] Further advantages of the invention will become apparent from the description and the drawings. Likewise, the above-mentioned and further-described features can be used individually or in combination in any desired manner. The embodiments shown and described are not intended to be exhaustive, but rather are exemplary in nature for describing the invention.

[0048] Detailed description of the invention and

[0049] Fig. 1 shows a schematic representation of a monitoring method according to the invention for a manufacturing process carried out with a laser processing machine.

[0050] Fig. 2 shows a schematic representation of a production arrangement with a laser processing machine and a monitoring system.

[0051] Fig. 3 shows a schematic representation of a partial section of the production arrangement from Fig. 2 when a monitoring event has occurred.

[0052] Fig. 1 shows a computer-aided monitoring method 10 according to the invention. The monitoring method is suitable and designed for monitoring a manufacturing process using a machine tool. In particular, the manufacturing process is carried out using a laser processing machine 12 (see Figs. 2, 3).

[0053] The monitoring method 10 is explained in more detail below with reference to the remaining Figs. 2, 3.

[0054] The computer-assisted monitoring method 10 comprises at least the following procedural steps:

[0055] In a method step 14 of the monitoring method 10, a continuous provision of production records 16 (see Figs. 2, 3) of a production area 18 (see Fig. 2) of the laser processing machine 12 is provided.

[0056] Manufacturing records 16 can be visual manufacturing records 20 (see Figs. 2, 3), for example photographs and / or video recordings, as well as sensory manufacturing records 22 (see Fig. 2), for example sensor recordings and / or data logs of a machine control 24 (see Fig. 2) of the laser processing machine 12.

[0057] In other words, various recordings of the manufacturing process of the laser processing machine 12 and / or of workpieces 26 to be manufactured or manufactured (see Fig. 3) can be used or further processed by the monitoring method 10.

[0058] Preferably, several, in particular a large number of, production records 16 are provided. Particularly preferably, the production records 20, in particular visual ones, relate to the entire production area 18 of the laser processing machine 12. This ensures particularly comprehensive monitoring.

[0059] A subsequent method step 28 of the monitoring method 10 provides for a comparison of the production records 16 with predetermined monitoring events 30 (see Fig. 2) in order to determine an actually occurring or occurred error event 32 (see Fig. 3).

[0060] An error event 32 is understood to be an event during production by the laser processing machine 12, both preceding and following, that can lead to quality losses in production and / or to damage or downtime of the laser processing machine 12 or the entire production process. The occurrence, course, and / or initiation of such an event to be monitored can be predetermined, for example, using known characteristic production records, so that an evaluation of identical or similar production records 16 can reliably infer the initiation and / or occurrence of an error event 32.

[0061] For example, it can be provided that continuously provided sensory production records 22 of the laser processing machine 12 are checked for correspondence with known error events. This can be done simply by evaluating the data logs of the laser processing machine 12 and the characteristic error messages of the laser processing machine 12 contained therein. Such an error message can, for example, relate to a faulty cut by the laser processing machine 12 or an incorrect positioning of the laser processing machine 12 relative to the workpiece 26, which are detected by machine sensors 34 (see Fig. 2) in the processing head 36 (see Figs. 2, 3) of the laser processing machine 12.

[0062] Furthermore, for example, it can be provided that continuously provided visual production records 20 of the production area 18 of the laser processing machine 12 are compared with known, predetermined visual monitoring events 30. Thus, tilting of a manufactured workpiece 26 or thermal deformation of the workpiece 26 or of a provided workpiece blank 37 (see Figs. 2, 3) can be detected by visually comparing the visual production records 20 with the visual monitoring events 30.

[0063] A further method step 38 of the monitoring method 10 provides for determining an event location 40 (see Fig. 3) for the determined actual error event 32 in the production area 18 of the laser processing machine 12.

[0064] In other words, the location of the error event 32 that has occurred in the production area 18 is determined. This allows an operator and / or a person entrusted with resolving the error event 32 to be provided with additional information regarding the cause and location of the error event 32. This significantly shortens the time required to resolve the error event 32, thereby minimizing the downtime of the laser processing machine 12.

[0065] The event location 40 is preferably determined by evaluating area coordinates 42 (see Fig. 3) of the production area 18 of the laser processing machine 12 stored in the production records 16. The area coordinates 42 are particularly preferably designed as machine coordinates of the laser processing machine 12.

[0066] For example, the event location 40 can be determined by evaluating the position coordinates of the processing head 36 associated with an error message from the machine sensors 34 of the laser processing machine 12.

[0067] Furthermore, for example, the event location 40 can be determined by evaluating the area coordinates 42 stored in a visual production recording 20. In a particular embodiment, the production area 18 captured by a visual production recording 20 is known. This allows for particularly fast and reliable assignment of the visual production recording 20. The area coordinates 42 can be stored manually or determined automatically by image analysis algorithms.

[0068] In a further method step 44 of the monitoring method 10, a determination of at least one visual event recording 46 (see Fig. 3) of the event location 40 from the production records 20 is provided.

[0069] A visual event recording 46 is understood to be a preceding and subsequent visual recording of the error event 32 that has occurred. In other words, in method step 44, a visual production recording 20 is determined that shows the error event 32.

[0070] According to the invention, in a method step 48 of the monitoring method 10, a visual output of a monitoring report 50 (see Fig. 2) is provided. The monitoring report 50 comprises at least the name of the error event 32, the event location 40, and at least one event recording 46 at the time of occurrence of the error event 32. This makes it possible to provide a visual representation to the operator and / or the person entrusted with rectifying the error event 32. This enables a particularly effective and rapid rectification of the error event 32, since rectification measures can be carried out in a targeted manner. The at least one output event recording 46 preferably extends over a time window of 2 or more, particularly preferably 10 or more, seconds around the time of occurrence of the error event 32.This allows the cause of error event 32 to be determined particularly precisely. Furthermore, the occurrence of future error events 32 can be prevented by correcting the cause.

[0071] Fig. 2 shows a manufacturing arrangement 52 with a monitoring system 54 and a laser processing machine 12.

[0072] The monitoring system 54 is designed and particularly suitable for use in the previously described monitoring method 10 (see Fig. 1).

[0073] According to the invention, the monitoring system 54 comprises an evaluation unit 56. The evaluation unit 56 is designed to receive the provided production records 16. The production records 16 can be received wirelessly or via a cable.

[0074] Preferably, the production records 16 of the production area 18 are transmitted from the laser processing machine 12 to the evaluation unit 56 via a secure internet connection. This allows the evaluation unit 56 to be used for the central monitoring of various production processes on various laser processing machines 12.

[0075] The evaluation unit 56 is also designed to compare at least one predetermined monitoring event 30 with the provided production records 16. The comparison can be performed using predetermined algorithms, preferably using self-learning algorithms. This allows the comparison to be performed particularly quickly and reliably by the evaluation unit 56. The evaluation unit 56 is further designed to determine at least one event recording 46 (see Fig. 3) of the event location 40 (see Fig. 3) for an actually occurred or detected fault event 32 (see Fig. 3). The event recording 46 is preferably determined using the aforementioned, in particular self-learning, algorithms.

[0076] The monitoring system 54 also has an output unit 58 for outputting the monitoring report 50. The output unit 58 is typically configured as a display 60 of the machine control system 24 of the laser processing machine 12. This enables the immediate provision of information that can be used to correct the error event 32.

[0077] As shown, the monitoring system 54 comprises several, here five, recording devices 62a-e, here cameras, for providing visual production records 20, here videos, of the production area 18.

[0078] Preferably, the recording devices 62a-e, as shown, have different recording orientations 64a-e with respect to the production area 18. This allows the production area 18 to be recorded from different perspectives, so that hidden areas, which may arise, for example, due to the movement of the processing head 36, can be avoided.

[0079] In other words, the provided visual manufacturing records 20 can preferably be recorded from different recording directions, due to the different recording orientations 64a-e of the recording devices 62a-e.

[0080] In a special embodiment, it can be provided that the visual event recording 46 determined in method step d) of the monitoring method 10 is determined depending on the recording orientation relative to the event location 40 (see Fig. 3). This can, for example, exclude visual production recordings 20 in which the event location 40 is obscured in perspective, for example by the processing head 36. As shown, the recording devices 62a-e can be designed to record partial areas 66a-e of the production area 18. The partial areas 66a-e can complement and / or overlap one another, so that the entire production area 18 can be recorded as completely as possible. This can ensure particularly complete and high-resolution monitoring of the production area 18.

[0081] The monitoring system 54 may include a central memory 68. The central memory 68 may be configured to store predetermined monitoring events 30 and / or to store production records 16. Preferably, the central memory 68 is used as a basis for further developing the algorithms used for evaluation, in particular self-learning algorithms.

[0082] Fig. 3 shows a partial section of the production arrangement 52 in a side view of the production area 18 of the laser processing machine 12.

[0083] The workpiece blank 37 arranged on a workpiece support 70 of the laser processing machine 12 is processed, or here cut, by means of a laser beam 72 of the laser processing machine 12.

[0084] A finished workpiece 26 is tilted during production by the laser processing machine 12 and protrudes beyond the workpiece blank 37 by a projection 73. The projection 73 is greater than a processing distance 74 of the processing head 36 of the laser processing machine 12, which is moved parallel to the workpiece blank 37 along the arrow directions 76. This creates the risk of a collision between the processing head 36 and the workpiece 26, which can lead to damage to the workpiece 26 and / or the laser processing machine 12 and to downtime of the laser processing machine 12. The tilted workpiece 26 is thus the cause of an error event 32. By carrying out the monitoring method 10 (see Fig. 1), the error event 32 can be detected by evaluating, for example here, a visual production record 20 of the event location 40, before damage to the laser processing machine 12 and / or the workpiece 26 occurs.The operator is notified of the error event 32 on the output unit 58 (see Fig. 2) along with the event location 40. According to the invention, an event recording 46, in this case a video recording of the tilted workpiece 26, is also displayed so that targeted remediation of the error event 32 can be initiated.

[0085]

[0086] 10 monitoring procedures; 42 area coordinates;

[0087] 12 laser processing machines; 44 process steps;

[0088] 14 procedural steps; 46 event recording;

[0089] 16 Production record; 25 48 Process step;

[0090] 18 Manufacturing area; 50 Monitoring report;

[0091] 20 visual production 52 production layout; recording; 54 monitoring system;

[0092] 22 sensory production 56 evaluation unit; recording; 30 58 output unit;

[0093] 24 machine controls; 60 displays;

[0094] 26 Workpiece; 62a-e Recording device;

[0095] 28 Process step; 64a-e Recording alignment;

[0096] 30 monitoring events; 66a-e sub-area;

[0097] 32 error event; 35 68 memory;

[0098] 34 machine sensors; 70 workpiece supports;

[0099] 36 processing head; 72 laser beam;

[0100] 37 workpiece blank; 73 overhang

[0101] 38 process steps; 74 processing distance;

[0102] 40 Event location; 4o 76 Arrow direction.

Claims

Patent claims 1. A computer-aided monitoring method (10) for a manufacturing process carried out with a laser processing machine (12), comprising the method steps: a) continuously providing (14) manufacturing records (16) of a manufacturing area (18) of the laser processing machine (12); b) comparing (28) the manufacturing records (16) with predetermined monitoring events (30) to determine at least one actual error event (32); c) determining (38) an event location (40) for the determined actual error event (32) in the manufacturing area (18) of the laser processing machine (12); d) determining (44) at least one visual event recording (46) of the event location (40) from the manufacturing records (16);e) visually outputting (48) a monitoring report (50), wherein the monitoring report (50) comprises at least the fault event (32), the event location (40) and an event recording (46) at the time of occurrence of the fault event (32); 2. Monitoring method (10) according to claim 1, wherein in method step c) the event location (40) is determined by evaluating area coordinates (42) of the production area (18) of the laser processing machine (12) stored in the production records (16).

3. Monitoring method (10) according to claim 1 or 2, wherein the at least one actual error event (32) is determined by outputting an error message of the laser processing machine (12).

4. Monitoring method (10) according to one of the preceding claims, wherein the at least one visual event recording (46) is dependent ability of a recording orientation (64a-e) to the event location (40) is determined.

5. Monitoring method (10) according to one of the preceding claims, wherein in method step a) visual production records (20) of the entire production area (18) are provided.

6. Monitoring method (10) according to one of the preceding claims, wherein at least 3, preferably at least 6, particularly preferably at least 12, visual production records (20) of the production area (18) are provided.

7. Monitoring method (10) according to claim 5 or 6, wherein the provided visual production records (20) are recorded onto the production area (18) from at least 3 different recording directions.

8. Monitoring system (54) for use in a monitoring method (10) according to one of the preceding claims, comprising - an evaluation unit (56) for receiving provided manufacturing records (16); for comparing at least one predetermined monitoring event (30) with the provided manufacturing records (16); and for determining an event location (40) and an event record (46) of the event location (40) for a detected fault event (32); - An output unit (58) for outputting a monitoring report (50).

9. The monitoring system (54) of claim 8, further comprising at least one visual recording device (62a-e), in particular a camera, for providing at least one visual manufacturing record (20).

10. The monitoring system (54) of claim 9, comprising two or more visual recording devices (62a-e) for providing two or more visual manufacturing records (20), wherein the recording devices (62a-e) have different recording orientations (64a-e) on the manufacturing area (18).

11. Monitoring system (54) according to one of claims 8 to 10, further comprising a monitoring sensor system, in particular comprising the machine sensors (34) of the laser processing machine (12), wherein the monitoring sensor system is designed to provide the production records (16).

12. Monitoring system (54) according to one of claims 8 to 11, wherein the output unit (58) is designed as a display (60) of a machine control (24) of the laser processing machine (12).

13. Monitoring system (54) according to one of claims 8 to 12, wherein the evaluation unit (56) is designed to evaluate production records (16) of two or more production areas (18) of two or more laser processing machines (12).

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