Method for operating machine tool and machine tool

Abstract

The invention relates to a method for operating a machine tool (10), comprising the following steps: a) automatically determining a current setpoint of at least one first operating parameter of the machine tool (10); b) automatically determining a current planned production situation of the machine tool (10); c) automatically processing the information determined in steps a and b by means of a data table which associates a value of a first operating parameter of the machine tool (10) for the currently planned production situation and / or a value of a second operating parameter of the machine tool (10) with at least one performance parameter; d) attempting to automatically determine at least one alternative value of the first operating parameter of the machine tool (10) by means of the data table, which at least one alternative value results in a higher value of the performance parameter in the currently planned production situation than the value of the performance parameter in the currently planned production situation having the current setpoint of the first operating parameter of the machine tool (10); e) if the value can be determined in step d), outputting the determined alternative value of the first operating parameter of the machine tool (10) or the determined value of the second operating parameter of the machine tool (10) to the person.

Description

Technical Field

[0001] The invention relates to a method for operating a machine tool and to a machine tool according to the preambles of the independent claims. Background Art

[0002] DE 10 2020 115 462 A1 describes a saw for cutting a panel With the aid of this machine, large plate-like initial workpieces can be divided into strip-shaped semi-finished products by longitudinal cutting and further divided into finished workpieces by transverse cutting and other steps as necessary. These finished workpieces can be used, for example, for furniture production.

[0003] Panel splitting saws are complex machines with a wide range of setting options ("operating parameters"). In order for the machine to operate efficiently and with guaranteed quality, it is essential to correctly set up the machine or its parameters and to use the existing functions and machine control of the machine in an optimal way. However, depending on the production situation, the correct setting of the machine is often not obvious to the operator and therefore requires expert knowledge. Often, operators are not aware of all the options available on their machine and are therefore unable to use the machine with maximum efficiency.

[0004] Usually, so-called "recipes" are used to define the production steps that are necessary for a workpiece or a machining program. Although the recipe includes the necessary production steps, it does not contain any further settings that are necessary for greater efficiency. It is known that machine tools can be set up with the help of material-dependent parameters. This technology automatically sets up the machine according to the material to be machined. This makes it possible to automate the settings. Settings that are "only mostly" correct or that are heavily dependent on the current production situation cannot be achieved with this method. In addition, material-dependent parameters must also be set, which means that the operator must be aware of the options and the correct settings. In the machining program, machine settings that may affect the ergonomic process or contain processes for specific raw materials are mostly not taken into account. Summary of the invention

[0005] The above-mentioned problem is solved by a method for operating a machine tool and a machine tool having the features of the corresponding independent claims.

[0006] According to the invention, intelligent improvement suggestions are made for the optimal use of the machine tool and its options based on the operator's respective production situation, and the operator can apply these improvement suggestions to the current production situation in a simple manner. At the same time, the control system of the machine tool does not "disable" the operator, but the operator can decide whether the improvement suggestion really makes sense with the help of any expertise he may have.

[0007] In particular, the invention proposes a method for operating a machine tool, in particular a sheet metal cutting device. The sheet metal cutting device is preferably a sheet metal cutting saw, with the aid of which large-sized plate-like initial workpieces can be cut into finished workpieces by longitudinal and transverse cutting and, if necessary, further steps (for example, in the case of furniture production). Such sheet metal cutting saws usually include a feed table, a machine table, a removal table, a sawing device and at least one feed device for moving the workpiece relative to the sawing device or relative to a sawing line defined by the movement of the sawing device.

[0008] The method according to the invention firstly comprises the automatic determination of the current set value of at least one first operating parameter of the machine tool in step a. Typically, this value is either preset by an automatic control (machine control) based on recorded, determined and / or predetermined parameters or is manually entered by an operator, for example based on personal experience (“expert knowledge”).

[0009] The method according to the invention further comprises, as step b., automatically determining a currently planned production situation of the machine tool. In the context of the present invention, the term "production situation" is to be understood in a very broad sense and can be any type of parameter or descriptive criterion which characterizes or describes the current machining process as a whole or in numerical or alphanumeric form and in a few cases also as pure numerical values ​​of operating parameters. The term "currently planned" means that the production situation does not necessarily exist now, but is future, i.e. a production process planned for the future.

[0010] The method according to the invention also comprises, in step c., automatically processing the information determined in steps a and b by means of a data table which associates the value of a first operating parameter of the machine tool for the currently planned production situation and / or the value of a second operating parameter of the machine tool with at least one performance parameter. Here, the term "data table" also includes a database with values, logical links, exclusion criteria and / or rule sets. Thus, the data table contains a data set in which numerical and / or alphanumeric data may be present. As a result of the processing, a performance parameter is obtained which characterizes the expected performance of the machine tool for the planned production situation and the determined value of the first operating parameter.

[0011] The method according to the invention also comprises, in step d., an attempt to automatically determine, by means of a data table, at least one alternative value for a first operating parameter of the machine tool or a value for a second operating parameter of the machine tool, which in the case of currently planned production leads to a higher value for the performance parameter than the value for the performance parameter in the case of currently planned production with the current set value for the first operating parameter of the machine tool. That is, a search is made for a better machine setting than the currently selected one. It is understood that there are situations in which there is no value for the first or second operating parameter that is more favorable than the value that has currently been set. In this case, the current setting is already optimal. In this respect, the method according to the invention merely "attempts" to determine a more favorable value, which may not be successful in all cases.

[0012] The two data tables are created in advance. In addition to appropriate numerical or alphanumeric values, at least the latter data table may also contain explanatory information, by means of which, for example, the operator can be informed of the special advantages of the proposed values. This information may also include, in particular, the name of the operating parameter and a description of the meaning of the operating parameter.

[0013] Finally, in step e, the determined alternative value for the first operating parameter of the machine tool or the determined value for the second operating parameter of the machine tool is automatically output to the person. This step is of course only possible if a more favorable value was actually found in the preceding step d. If this is not the case, for example, nothing is output or the person is explicitly informed that the most favorable setting is currently already present.

[0014] By means of an automatic output to a person (e.g. an operator, a shift supervisor or other responsible specialist), he or she can independently decide, using his or her specialist knowledge, whether the suggested values ​​(i.e. the suggested machine settings) make sense for the current production situation. If the person decides that this is the case, he or she can adopt the suggested values ​​by a corresponding input on an input device (keyboard, touch screen, microphone, etc.). Alternatively, the person can also abandon the suggestion, or he or she can "set the suggested values ​​to be presented again" so that he or she can decide again next time with more operating experience whether the alternative value should be used. This task can also be carried out directly on the machine tool or outside the machine tool (e.g. in the office of a production manager, etc.).

[0015] In an extended solution, it is provided that the first operating parameter of the machine tool or the second operating parameter of the machine tool is a parameter selected from the following group: a target operating state or an actual operating state of a subsystem of the machine tool; a target arrangement or an actual arrangement of at least one workpiece to be processed. The subsystem can be a specific detection device, the measured values ​​of which are used to control and / or regulate the machine tool, or it can also be, for example, a drive or other component. In the case of a sheet metal splitting saw, a specific example of a subsystem can be a so-called "reflection sensor (Lichttaster)", by which the cutting length of the current workpiece can be determined. If the reflection sensor is activated, the movement of the sawing device can be limited to the cutting length of the current workpiece, but on the contrary, if the reflection sensor is not activated, the saw must move in one step over the maximum possible stroke distance. When the reflection sensor is activated, this leads to an increase in performance, because the machine tool can saw faster based on material recognition. However, if the surface of the workpiece to be processed cannot be detected by the reflection sensor, it makes sense not to activate it. This is the case, for example, with the black surface of the workpiece.

[0016] The subsystem may also be, for example, an operator assistance system which issues, for example, optical or acoustic instructions to the person regarding the action to be taken. The subsystem may also be, for example, a height measuring device for a bead which automatically controls or regulates a bead which is usually present in the region of the sawing line in a sheet metal separation device. In the case of a sheet metal separation saw, a specific example of an arrangement of the workpieces is an arrangement of two workpieces adjacent to one another or overlapping one another, or it may be possible to cause two workpieces to be processed sequentially or simultaneously.

[0017] Another example of a subsystem that is relevant here is the air supply system of an air cushion table, for example a blower, which can be activated in certain operating situations and not in others. Furthermore, a subsystem that is relevant here can be an automatic angle pressure device (Winkelandrückvorrichtung), which can be switched off, for example, during the production of manually manipulated workpieces. In the context of the present application, the term "subsystem" can also be extended to the consideration / disregard of specific parameter groups. For example, the operator can consciously switch the use of material-related parameters in the machine control on or off. Furthermore, the term "subsystem" can be extended to the switching states of specific software-based submethods, for example, whether the cutting plan optimization or stacking optimization is switched on or off. Another subsystem can be a movable chuck that can be individually moved. Depending on the switching state of the subsystem, parts of the cutting plan or the entire cutting plan hardly require any reordering.

[0018] As mentioned above, the subsystem may also be a drive, and the operating parameter may characterize the operating state, current power, current speed or simply the switching state of the drive.

[0019] In an extended embodiment, it is provided that the production situation is at least one selected from the following group: machining a workpiece with specific workpiece properties; machining the workpiece with a specific tool; machining the workpiece in a specific relative direction; machining the workpiece for a specific purpose. The workpiece properties may include, for example, the type of workpiece surface, for example, a black surface as described above or a surface that is particularly sensitive to pressure. If the machine tool can be operated with different types of tools, such as milling tools and drilling tools, specific tools may play a role. In particular, in the case of sheet metal splitting saws, the relative direction may be an important defining criterion for the production situation, because it defines the implementation of the longitudinal cut for producing the strip from the initial workpiece and the implementation of the transverse cut for producing the workpiece from the strip. The processing purpose may also define the production situation: for example, in the case of a sheet metal splitting saw, the processing purpose is necessary for whether the sawing device is used for separating cuts, trimming cuts or groove cuts. The specific processing purpose may also include the production quality that needs to be achieved, for example, whether it is a finished cut or a rough process.

[0020] In an extended embodiment, it is provided that the performance parameter is one selected from the following group: machining speed, for example the clock speed, but also the rotational speed of a rotating tool or the number of parts to be produced per shift, even if these come from a higher-level system, such as a "factory control system" or the like; machining quality, for example the quality of the cutting edge or the quality of the workpiece surface, but also the number of rejected workpieces; safety, the safety of personnel and the machine tool and the safety from associated damage; maneuverability, for example the forces or paths that must be applied or accumulated when a workpiece is manually manipulated by a person; material waste, in particular the amount of material waste or the utilization rate of the initial workpiece for producing the finished workpiece.

[0021] In an extended solution, it is provided that the personnel evaluate the acceptance of the substitute value of the first operating parameter of the machine tool or the determined numerical value of the second operating parameter of the machine tool output to the personnel. For example, the machine tool can regularly send anonymous data about the use and acceptance of the instructions output to the personnel to a central server (in principle, the evaluation can also be performed on the machine tool itself). The data collected here can then be evaluated by algorithms and / or human experts, for example based on history, to generate further suggestions and / or to check whether the suggestions are often adopted by the personnel. The data obtained can be used anonymously, for example, for marketing, development and product management. It is also possible to identify unused or rarely used functions that can improve the performance of the machine tool.

[0022] In one embodiment, it is provided that the data table (which is also referred to as the second data table) is adjusted based on the evaluation. In this way, the suggestion system can be improved and adjusted so that in the above-mentioned step d, an alternative value which is more often acceptable to the person is determined.

[0023] In one embodiment, it is provided that, based on the evaluation, possible improvements of the machine tool are determined, which improvements can achieve higher performance parameters. Thus, suggestions or proposals for improving the machine tool can be prepared for the customer, either by hardware or by activating existing options, wherein these existing options enable the customer to achieve an increase in the performance of his machine tool.

[0024] In one embodiment, it is provided that in step d, the replacement value is determined according to a predetermined priority parameter. The priority parameter can in principle be identical to the above-mentioned performance parameter. In this way, individual and / or customer-specific preferences can be taken into account.

[0025] In one embodiment, it is provided that the substitute value determined in step d and output in step e is assigned to a specific person or a specific user, and in particular, the substitute value is automatically set when a specific person or a specific user is identified. This also allows the personal preferences of individuals and / or customers to be taken into account or to be better served. The latter two embodiments allow "specific user application profiles" with priority or training settings to be provided and used. "Specific user" can refer to an individual or to a customer as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be described below with examples. In the accompanying drawings:

[0027] Figure 1 shows a schematic top view of a machine tool in the form of a panel dividing saw; and

[0028] Figure 2 Shown is a diagram for illustrating the operation Figure 1 Flowchart of the method for the machine tool shown. DETAILED DESCRIPTION

[0029] Figure 1 In the embodiment, a machine tool in the form of a plate splitting saw is provided with reference numeral 10. It comprises Figure 1 The saw is not shown in the drawing. The sawing line is indicated only by a dashed line with the reference numeral 12. The saw can be moved longitudinally to the sawing line 12 for the cutting operation. Above the sawing line 12 there is a pressure bar 14, below which there is a machine table 15, in which there is a saw groove (not shown), through which the saw blade of the saw can at least temporarily extend upwards above the level of the machine table 15.

[0030] The machine tool 10 further comprises a feed table 16 which is formed, for example, by a plurality of rollers (not shown). Figure 1In the initial configuration of the machine tool 10 shown, a plate-like workpiece 18 is located on the feed table 16. The workpiece 18 can be moved in a feed direction (arrow 22) by a first feed device 20 and can also be moved in a direction opposite to the feed direction 22 by a first clamping device 24 in the form of a pneumatic chuck. The first clamping device 24 is connected to a first motorized carrier 26 that moves along the feed direction 22.

[0031] The machine tool 10 further includes a second feeding device 28, which is arranged at Figure 1 In the static position shown, it is very close to the sawing line 12. The second feed device 28 comprises a second carrier 30 in the form of a movable carriage, to the side of which a second clamping device 32, for example in the form of a pneumatic chuck, is fixed. Figure 1 Below, a removal table 34 consisting of four sections is connected to the machine tool table 15.

[0032] The machine tool 10 also includes a processing device 36. For example, the processing device 36 can be a computer. The processing device 36 includes at least one processor 38 and at least one memory 40. The program code stored in the memory 40 can be run on the processor 38. The program code is programmed so that the processing device 36 automatically controls the processing described below. Figure 2 Method of explanation.

[0033] The processing device 36 also includes an output device 42, which is used to output information to a person, such as an operator of the machine tool 10. For example, the output device 42 may include a screen, a speaker, a laser projector, a light strip, etc. In addition, the processing device 36 also includes an input device 44, such as a keyboard, a touch screen, a microphone, etc.

[0034] During operation of the machine tool or the panel splitting saw 10, a plate-shaped initial workpiece 18 can be positioned relative to the sawing line 12 by the first feed device 20 and cut into strips by the saw (longitudinal cutting). The strip is then rotated 90° and placed again on the feed table 16 so that it is positioned relative to the sawing line 12 only by the first feed device 20 or only by the second feed device 28 and sequentially split into workpieces (transverse cutting).

[0035] However, it is also possible that two adjacent strips are placed on the feed table 16, wherein one strip is held by the first feed device 20 and the adjacent strip by the second feed device 28. If necessary, the two feed devices 20 and 28 then position the respective strips in different ways relative to the sawing line 12, so that the strips can be simultaneously divided differently by a single cut (transverse cut) of the saw. It is also possible to saw individual workpieces or strips, but also stacked workpieces or strips.

[0036] Now through Figure 2 The method for operating the machine tool 10, which has already been briefly mentioned, is explained in more detail. The method starts in a function block 46. In a block 48, two variables are processed, namely the current set value of a first operating parameter of the machine tool 10 and the currently planned production situation of the machine tool 10. The current set value of the first operating parameter is determined in a function block 50, and the current production situation is determined in a function block 52. Both function blocks 50 and 52 receive corresponding data from a machine control device 54.

[0037] The above-mentioned first operating parameter of the machine tool 10 can be a parameter selected from the following group: a target operating state or an actual operating state of a subsystem of the machine tool 10; a target arrangement or an actual arrangement of at least one workpiece 18 to be processed. A subsystem can be a specific detection device, whose measured values ​​are used to control and / or adjust the machine tool 10. In the case of the current panel splitting saw 10, a specific example of a subsystem can be a so-called "reflection sensor", by which, for example, the cutting length of the current workpiece 18 can be determined. If the reflection sensor ( Figure 1 If the reflective sensor (not shown) is activated, the movement of the saw in the longitudinal direction of the saw line 12 can be limited to the cutting length (corresponding to the width of the workpiece 18), but if the reflective sensor is not activated, the saw must move during the cutting process over the maximum possible stroke distance (more or less than the total length of the saw line 12).

[0038] The subsystem may also be, for example, an operator assistance system which issues, for example, optical or acoustic instructions to a person regarding the action to be taken, for example, by means of an output device 42. The subsystem may also be, for example, a height measuring device for the pressure bar 14 which automatically controls or regulates the lowering of the pressure bar 14 onto the workpiece arranged in the area of ​​the sawing line 12, both as a pre-positioning and for the actual processing. In the case of the present panel dividing saw 10, a specific example of the arrangement of the workpieces may be an arrangement of two workpieces adjacent to or overlapping each other, or may cause two workpieces to be processed sequentially or simultaneously, as described above by way of example in conjunction with the first feed device 20 and the second feed device 28.

[0039] Typically, a subsystem may be a configurable component, such as the position of a movable receiving station or the height of a stacking station, etc., or a configurable software module.

[0040] The production situation determined in the functional block 52 may be at least one selected from the following group: machining a workpiece with specific workpiece properties; machining a workpiece with a specific tool; machining a workpiece in a specific relative direction; machining a workpiece for a specific purpose. For example, the workpiece properties may include the type of workpiece surface. For example, the workpiece may have a colored, in particular black, surface, or the workpiece or the material of the workpiece may be particularly sensitive to pressure, so that the clamping pressure must be adjusted accordingly, for example by means of the above-mentioned pressure strip 14. In an embodiment not currently described, if the machine tool can be operated with different types of tools, for example with milling tools and drilling tools, specific tools may play a role.

[0041] Particularly in the case of the present panel dividing saw 10, the relative direction can be an important defining criterion for the production situation, since it defines the implementation of the aforementioned longitudinal cuts for producing a strip from the initial workpiece 18 and the implementation of the aforementioned transverse cuts for producing a (finished) workpiece from the strip. The processing purpose can also define the production situation: for example, in the case of the present panel dividing saw 10, the processing purpose is necessary for whether the sawing device is used for separating cuts, trimming cuts or groove cuts.

[0042] The automatic processing in the function block 48 is performed under the condition of using the data table provided in the function block 56, which relates the value of the first operating parameter of the machine tool 10 for the currently planned production situation to at least one performance parameter. The data table 56 is pre-created in the function block 58, for example, under laboratory conditions. For example, the data table contains a large number of data sets for each possible production situation, which data sets consist of two types of data: "first operating parameter" and "performance parameter".

[0043] The performance parameter can be one selected from the following group: processing speed, such as clock speed, in the case of the current panel splitting saw 10, it can also be, for example, the rotational speed of the rotating saw blade or the feed speed of the saw frame on which the saw blade is arranged; processing quality, such as the quality of the cutting edge or the quality of the workpiece surface produced by the sawing process on the strip or the finished workpiece, or the number of unqualified workpieces after the sawing process is implemented; safety, such as the personnel safety of the machine tool 10 and the safety of the machine tool 10 from damage; maneuverability, for example, the force or path that must be applied or accumulated when the workpiece is manually manipulated by a person (for example, the strip is rotated 90° and replaced in the feed device 20 and 28); material scraps, in particular the amount of material scraps or the utilization rate of the initial workpiece 18 used to manufacture the finished workpiece.

[0044] For example, an example of some columns and rows in such a data table might look like this:

[0045]

[0046] In the table, panel_type_1 represents a workpiece having a first workpiece characteristic, and panel_type_2 represents a workpiece having a second workpiece characteristic; assist_off and assist_on represent the on-state of the optical assist system; RPM1 and RPM2 represent the corresponding speeds of the sawing tool; sens_on and sens_off represent the on-state of the detection device (such as a length measurement system); L1 to L8 represent different values ​​of performance parameters, and in the current embodiment, represent the processing speed.

[0047] The result of the processing in functional block 48 is to provide a desired value for the performance parameter in functional block 60 .

[0048] In function block 62, an attempt is made to determine, with the aid of a (second) data table provided in function block 64, a substitute value for a first operating parameter of machine tool 10 or a numerical value for a second operating parameter of machine tool 10, which substitute value for the first operating parameter of machine tool 10 or the numerical value for the second operating parameter of machine tool 10 results in an expected value of a performance parameter under the currently planned production conditions (function block 52), which is higher than the expected value of the performance parameter provided in function block 60 under the currently planned production conditions with the currently set value of the first operating parameter of machine tool 10.

[0049] The data table provided in function block 66 is also generated in advance, for example, in a laboratory (function block 66). The data table provided in function block 64 may contain, for a variety of possible production situations, value pairs, triples of values, quadruples of values, etc., which relate at least two data types, “first operating parameter” and “performance parameter”, to each other. However, preferably, the data set also contains other information, such as the type of the first operating parameter, the type of the performance parameter, and other information useful to the operator of the machine tool 10.

[0050] The corresponding substitute value for the first operating parameter is provided in function block 68. In this case, the priority specified in function block 70 also plays a role, because the substitute value is determined according to the priority parameter specified in function block 70. The priority parameter can in principle be the same as the performance parameter listed above.

[0051] In function block 72, it may be determined that the current settings are already optimal, i.e., no alternative value for the first operating parameter that improves the performance parameter can be found. Conversely, in function block 74, it may be determined that the current settings are not optimal, i.e., an alternative value for the first operating parameter that is more favorable for performance has been found. In function block 76, a corresponding output is made to a person, for example, by means of output device 42.

[0052] Furthermore, the person can also be informed whether a more favorable alternative value can be found and, if so, which operating parameter the alternative value relates to and which is the better value. Furthermore, the person can also be informed in this case what type of functional improvement can be achieved by using the alternative value for the first operating parameter (or the second operating parameter). For example, the range of the expected performance improvement can also be informed.

[0053] In function block 78, the person can indicate, for example, on input device 44, whether he or she accepts the suggestion provided in function block 76. If he or she accepts the suggestion, the machine control (function block 54) will be adjusted accordingly. The machine control 54 learns the identity of the person (function block 80). This allows the accepted substitute value of the first operating parameter to be assigned to the person in function block 82, so that the machine control can be set accordingly for future production situations by the person in advance and automatically.

[0054] The input of the person in the function block 78 can be evaluated in the function block 84. For example, the machine tool 10 can regularly send anonymous data about the use and acceptance of the instructions output to the person to a central server (not shown) (in principle, the evaluation can also be performed on the machine tool itself). The data collected here can then be evaluated by algorithms and / or human experts to generate further suggestions and / or to check whether the operator's suggestions are often adopted. The data obtained can be used in an anonymous manner, for example, for marketing, development and product management. It is also possible to identify unused or rarely used functions that can improve the performance of the machine tool. The data table in the function block 64 can also be adjusted in this way.

[0055] Furthermore, based on the evaluation in functional block 84, possible improvements of machine tool 10 that enable higher performance parameters to be achieved can be determined in functional block 86. Thus, suggestions or proposals for possible improvements of machine tool 10 can be prepared for the customer, either by hardware or by activating existing options, which enable the customer to achieve an increase in the performance of machine tool 10.

[0056] The method ends in box 88 .

Claims

1. A method for operating a machine tool (10), in particular a sheet metal cutting saw, characterized in that The method comprises the following steps: a. automatically determining a current setting value of at least one first operating parameter of the machine tool (10); b. automatically determining the current planned production status of the machine tool (10); c. automatically processing the information determined in step a and step b by means of a data table which associates the value of the first operating parameter of the machine tool (10) and / or the value of the second operating parameter of the machine tool (10) for the currently planned production situation with at least one performance parameter; d. attempting to automatically determine, by means of a data table, at least one alternative value for the first operating parameter of the machine tool (10) or a value for a second operating parameter of the machine tool (10), the at least one alternative value for the first operating parameter or the value for the second operating parameter resulting in a higher value for the performance parameter in the currently planned production situation than the value for the performance parameter in the currently planned production situation with the currently set value for the first operating parameter of the machine tool (10); e. If a value can be determined in step d, automatically outputting the determined substitute value of the first operating parameter of the machine tool (10) or the determined value of the second operating parameter of the machine tool (10) to a person.

2. The method according to claim 1, characterized in that The first operating parameter of the machine tool (10) or the second operating parameter of the machine tool (10) is a parameter selected from the following group: a target operating state or an actual operating state of a subsystem of the machine tool (10); a target arrangement or an actual arrangement of at least one workpiece (18) to be processed.

3. The method according to at least one of the preceding claims, characterized in that The production situation is at least one selected from the following groups: processing a workpiece (18) having specific workpiece characteristics; processing the workpiece (18) with a specific tool; processing the workpiece (18) in a specific relative direction; processing the workpiece (18) for a specific purpose.

4. The method according to at least one of the preceding claims, characterized in that The performance parameter is one selected from the following group: processing speed; processing quality; safety; maneuverability; material scrap.

5. The method according to at least one of the preceding claims, characterized in that The acceptability of the substitute value of the first operating parameter of the machine tool (10) or the determined value of the second operating parameter of the machine tool (10) output to the person is evaluated.

6. The method according to claim 5, characterized in that The data table is adjusted based on the evaluation.

7. The method according to claim 5 or 6, characterized in that: Modifications to the machine tool (10) that would enable higher performance parameters to be achieved are determined based on the evaluation.

8. The method according to at least one of the preceding claims, characterized in that The replacement value in step d is determined according to a predetermined priority parameter.

9. The method according to at least one of the preceding claims, characterized in that The substitute value determined in step d and output in step e is assigned to a specific person or a specific user, and in particular, the substitute value is automatically set when the specific person or the specific user is identified.

10. The method according to at least one of the preceding claims, characterized in that The automatic output in step e is performed directly at the machine tool (10) or at a location far away from the machine tool (10), for example, in a space far away from the machine tool (10).

11. A machine tool (10) for automatically machining a workpiece (18) by means of a tool, the machine tool (10) comprising a machining device (36), the machining device (36) having a processor (38) and a memory (40), wherein: A program code can be executed on the processor (38), characterized in that the processing device (36) is programmed to carry out the method according to the preceding claim.

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