CONTROL SYSTEM OF A MACHINE TOOL, PALLET SYSTEM WITH RELEASE DATA AND PROCEDURE FOR MACHINING RELEASE

Abstract

The invention relates to a control system for a machine tool 6, comprising: a receiving area 13 for receiving a pallet system comprising at least one pallet 1; and predetermined processing data available on the control system side for enabling the machine tool 6, wherein the control system is configured, upon receiving the pallet system in the receiving area 13, to read the pallet system-specific release data from the pallet system and compare it with the predetermined processing data in order to enable processing on the machine tool 6. Furthermore, the invention comprises a pallet system, comprising: a pallet 1; at least one structure; and a rewritable data memory 2, which is integrated into the pallet 1; and which stores pallet system-specific release data for enabling the machining process on the machine tool 6.

Description

[0001] The present invention relates to a system for controlling a machine tool for machining. The invention also relates to a workpiece carrier or pallet on which workpieces can be clamped for machining and which comprises a data memory for storing process parameters, based on which the operation of the machine tool can be controlled at the time of start-up.

[0002] When machining workpieces using a machine tool, tools and workpieces are moved relative to each other to machine the workpiece. Systems for handling are known from the prior art that provide workpiece pallets on which workpieces can be loaded independently of the machine tool. Document DE 10 2019 211472 A1 discloses a device for energy and information transfer between the pallet and the machine tool. At the loading station, one or more workpieces can be prepared on the pallet for machining. The disclosure of this document is hereby incorporated in its entirety by reference.

[0003] Before machining, the pallets can be stored in a handling system, as shown in DE 10 2020 133 542 A1, until further notice. An allocation system monitors the utilization of the machine park and allocates pallets to available workstations. In a flexible work environment, work is carried out on the machine tool spindle in mixed operation between neutral and high-speed operation. Different occupational health and safety requirements apply here. For example, a higher machine tool speed requires greater clamping force.

[0004] The required speed is determined by the machine tool's programming and is inherent in the machine tool. Starting with excessively high workpiece pallet requirements can cause damage to the machine tool and compromise work safety.

[0005] One object of the invention is therefore to provide optimized machining on a machine tool, taking a pallet into account. A further object may be to make machining on a machine tool safer.

[0006] To achieve these objectives, the features of the independent claims are proposed. Advantageous further developments can be found in the dependent claims. The respective dependent claims relate to preferred embodiments, each of which can be provided individually or in combination.

[0007] According to one aspect of the invention, a control system for a machine tool is provided. The machine tool can be configured in particular for machining workpieces, such as turning and milling. The machine tool can be automated and used in conjunction with other machines, as well as in a chain of machining steps. The machining of at least one workpiece can be carried out in mixed operation. Mixed operation refers to operation in which several machining operations, such as turning and milling, etc., can be applied. Mixed operation can be carried out on one machine tool or on several machine tools. Particularly with this type of system, which uses several different pallets, some of which differ significantly in design (e.g. groove pattern, etc.), the detection and verification of the pallet is very important.

[0008] The machine tool may include a receiving area for accommodating a pallet system. The receiving area may be located within the housing of the machine tool or at least be directly related to the release of the machine tool for machining.

[0009] The receiving area can be a spatially limited area designed to accommodate the pallet or pallet system for processing in the machine tool. The receiving area can be located at the same location as the area where the processing takes place. Alternatively and / or additionally, the receiving area can also be located outside the housing of the machine tool.

[0010] The control system can include predetermined machining data. This machining data can be used for purposes such as identifying the pallet system, configuring the machine tool, or preventing the start of machining. This predetermined machining data can, for example, be control data (in particular, internal control data on the control system side) of the machine tool and can be used, for example, to control and / or define an operating range of the machine tool. Thus, this control data can, for example, specify the (optimal and / or maximum) spindle speed, the (optimal and / or maximum) table speed, the (optimal and / or maximum) feed rate, and the (optimal and / or maximum) clamping force during workpiece machining.The “predetermined machining data” are predetermined because this machining data is already available to the machine tool control system, in particular before workpiece machining begins and especially before a workpiece pallet (or pallet system) is inserted into the machine tool’s receiving area. This design therefore further increases machining reliability. The table speed can vary depending on which clamping device or component is clamped on the pallet. If, for example, an FD pallet is inserted without a clamping device, the machine can also operate in rotation mode and the table speed can reach a maximum value. If, on the other hand, a standard pallet is inserted, the table speed is only used for positioning, for example, so the table speed is set to a minimum value.Table speed refers to the speed of a machine tool's worktable, usually during rotational movement. A pallet with one or more workpieces and / or a pallet system can be mounted on the worktable. The movement of the worktable allows objects mounted on it to be positioned and / or workpieces to be machined through relative movement to a cutting tool.

[0011] The pallet system can, for example, comprise: at least one pallet, at least one rewritable data storage device, which can be integrated into the pallet and stores pallet-system-specific release data for enabling the machining process on the machine tool. Pallet-system-specific release data includes, in particular, data that is specific to a specific pallet system and the elements it contains.

[0012] A pallet can be a workpiece carrier that can be inserted into a machine tool. A pallet can include interfaces that enable exchange between multiple machine tools. The workpieces can remain on the pallet during exchange and do not need to be reclamped, thereby increasing manufacturing tolerance and process efficiency. The pallet can be essentially rectangular, square, circular, or oval and can be provided with grooves or threaded holes. Detection or verification is particularly advantageous when used in mixed operations, as the requirements for the clamping device can sometimes vary considerably.

[0013] Furthermore, the pallet system can comprise at least one superstructure, where superstructures describe attachments to the pallet. In particular, clamping devices such as clamps, jaw lathe chucks, quick-change drill bit holders, or T-nuts can be superstructures. Clamping devices can be elements that can be used to secure workpieces to the pallet. Superstructures can also be workpieces. These can be, for example, semi-finished products, blanks, or already machined workpieces.

[0014] The rewritable data storage device can be implemented as a memory chip. This is advantageously a non-volatile memory. Rewritable describes the ability of the data storage device to store different or identical data multiple times in succession and to make it available for reading at least once until the stored data is completely or partially overwritten or deleted. The rewritable data storage device can be part of an RFID system in which data and power transmission is carried out wirelessly. Power transmission can also be optional if the data storage device is self-powered or has a cable-based power supply. Alternatively or additionally, the rewritable data storage device can be implemented as a flash memory device with a wired interface.Alternatively and / or additionally, an e-paper display can function as a rewritable data storage device, for example with text, QR code or barcode.

[0015] The pallet system can comprise one or more rewritable data storage devices. A data storage device can also partially contain immutable data, in particular a unique identifier, also known as a UID. A UID can be a unique serial number, for example, on an RFID tag. The predetermined machining data can be generated by one or more development systems during the creation of the machine code for programming the machine tool or during product development and design of the workpiece to be manufactured. Alternatively or additionally, the predetermined machining data can also be internal data of the machine tool control system. The data can be influenced by properties such as the material to be machined, the feed rate, the cutting edges used, the desired surface quality, the ambient temperature and / or the cycle times.

[0016] The control system can read pallet system-specific release data from the pallet system. The pallet system-specific release data can be configured to include data that corresponds at least partially to the predetermined processing data. Due to the fact that the pallet system-specific release data can be generated independently of the predetermined processing data, the possibility of inconsistencies in the dataset, such as a missing comparison parameter, can arise, which the control system is capable of tolerating. This can reduce the number of user interventions.

[0017] The control system can compare the pallet system-specific release data with the predetermined processing data (machine-readable, automated, pallet system recognition with readable parameters from the pallet / workpiece carrier / clamping device) to enable or prevent the machining process. This can occur at the time the pallet system is located in the receiving area of ​​the machine tool (or is being swapped in), especially when the pallet system is being loaded into the receiving area of ​​the machine tool. In the first step, i.e., before machining begins, so-called two-factor authentication can be performed based on the machine tool data and the data of the swapped-in pallet system.For example, processing can only be released once it has been confirmed (e.g., by comparing UIDs as two-factor authentication) that all correct elements of the pallet system, such as pallets, assembly elements, etc., are present and that no incorrect element is present in the pallet system. This enables clear management of various information from pallets, clamping devices on pallets, and workpiece carriers, for example, reducing the permissible speed according to operator input (the system can be used on stand-alone machines and machines with any type of automation, including robot loading and pallet storage), and reducing the clamping force with a corresponding reduction in the speed at the machine table. This enables clear assignment of pallets, workpiece carriers, and clamping devices on linked machines within the system.Different speeds and functions can also be enabled separately, depending on the result of the comparison.

[0018] Furthermore, in one embodiment, a sensor matrix can be used for two-factor authentication. For example, the sensors present in a clamping device and / or spindle are uniquely configured. The sum of the data or signals from the sensors forms a unique sensor matrix. The signals or data from the pallet system's memory can be verified with the expected signals from the sensor matrix. Furthermore, clamping device detection can be provided in the pallet interface or in the clamping device carrier. Processing release, for example, of the machine table, can be possible with or without clamping devices.

[0019] The pallet system-specific release data can be read using a data reading device. The data reading device can be installed in the receiving area of ​​the machine tool and can access the pallet system-specific release data via a wired, tactile, and / or wireless connection, for example, via radio or visually. In particular, the data reading device can be part of an RFID system.

[0020] The predetermined machining data and pallet system-specific release data can include parameters, in particular control parameters of the machine tool, in the configuration information. The control system can set a parameter of the machine tool to a value of the configuration information of the pallet system-specific release data if the parameter of the predetermined machining data is equal to or greater than the parameter of the configuration information of the pallet system-specific release data. Thus, this configuration can further increase machining reliability. This can be done, in particular, before the machining operation is released.

[0021] The predetermined machining data can contain limit values ​​for preventing (and / or limiting) the start of machining, for example a maximum permissible clamping force or spindle speed of the machine tool for a predetermined machining sequence when manufacturing a specific workpiece. Depending on the workpiece to be machined, different limit values ​​can apply, for example when machining steel as the workpiece material compared to machining aluminum. For example, the table speed can also be part of the predetermined machining data. If a pallet that is set up for rotating machining is used, the table's rotating mode can be actively operated at a high table speed. For example, when using a pallet that is not set up for rotating machining, the table's rotating mode can be used for positioning.In this case, the table speed is designed to be low. Alternatively, the table rotation can be completely prevented by setting a corresponding numerical value. This design can thus further increase machining safety.

[0022] The control system can be configured to prevent a start of processing (or to limit processing) if at least one limit value of the predetermined processing data is equal to or greater than the permissible maximum value of the corresponding critical parameters (hereinafter also referred to as critical information) of the pallet system-specific release data.

[0023] The control system can compare a unique identifier contained in the pallet system-specific release data with a predefined comparison parameter of the predetermined processing data, in particular to determine whether the correct pallet system (preferably including superstructures) is present in the receiving area. The predefined comparison parameter can, in particular, be a unique identifier such as a UID. The risk of incorrect processing can thus be reduced or avoided. This design can thus further increase processing safety.

[0024] The predetermined machining data can be made available to the control system via a cloud-based system. Cloud-based, in the broadest sense, refers to the storage resource being provided at a location other than the immediate vicinity of the machine tool. This solution benefits from its flexibility in an automated process environment with a large number of machine tools. The predetermined machining data can be made available to more than one control system. Additionally and / or alternatively, the predetermined machining data can also be stored in the machine tool's control unit and / or in the machine tool itself.

[0025] The predetermined machining data can be generated automatically. The process can be carried out together with the design of the workpiece to be manufactured. Alternatively or additionally, the predetermined machining data can be created during programming of the machine tool. In turn, additionally or alternatively, the predetermined machining data can be created at the same time as the pallet system-specific release data. User input can trigger the write process to the rewritable data memory and / or the memory for storing the predetermined machining data. Thus, this design can further increase machining reliability.

[0026] The pallet system-specific release data can include at least one unique identifier (UID) that is designed to uniquely identify the pallet. The UID can consist of a serial number, an alphanumeric sequence of numbers / letters, and / or a title such as the product or project name.

[0027] The pallet system-specific release data can contain identification data for identifying the pallet system and / or configuration data for setting the machine tool's process parameters and / or critical information, in particular permissible maximum values, for preventing the machine tool from starting machining. Thus, this design can further increase machining safety.

[0028] The pallet system-specific release data can include permissible maximum values, in particular maximum control values, for one or more elements of the pallet system, in order to define a permissible operating range of the pallet system. A permissible operating range can be defined via load limits, for example, depending on the load-bearing capacity of the pallet system or its subcomponents. The permissible maximum values, which also serve as the configuration data, can be individually configured for individual components of the pallet system. The comparison and release of processing can be carried out component by component for the pallet system with multiple components. In particular, the release and / or restriction can be applied to a portion of the components of the pallet system. This configuration can thus further increase safety during processing.

[0029] The configuration data of the pallet system-specific release data can contain control parameters of the machine tool, in particular a spindle speed, a table speed, a clamping force and / or a feed of the machine tool.

[0030] The pallet system-specific release data can contain permissible maximum values ​​for preventing the start of machining, in particular a clamping force, table speed and / or spindle speed of the machine tool.

[0031] The pallet system-specific release data can include several unique identifiers, UIDs, in particular at least one for the pallet and one for each assembly element comprising the specific pallet system. The release process can thus be individually adapted to the requirements of the respective assembly and / or each assembly can be individually identified. For example, processing can only be released once it has been confirmed (by comparing the UIDs as two-factor authentication) that all correct elements of the pallet system, such as pallets, assembly elements, etc., are present and that no incorrect elements are present in the pallet system. For example, it can happen that the assemblies of the pallet system are incorrectly assembled by a user.In such a case, the comparison can detect that, for example, a specific UID does not match the predetermined processing values. An error message can be issued and the start of processing can be blocked for security reasons. Thus, this design can further increase processing security.

[0032] A method for controlling a machine tool is proposed, which may include reading the pallet system-specific release data from a rewritable data memory located in the receiving area of ​​the machine tool and comparing the pallet system-specific release data with predetermined machining data in order to release machining of the machine tool.

[0033] Furthermore, a method is proposed which can set a parameter, in particular machining parameters of the machine tool, to a value of the configuration information of the pallet system-specific release data if the value of the configuration information of the predetermined machining data is equal to or greater than the value of the configuration information of the pallet system-specific release data (or preferably does not correspond to the value of the configuration information).

[0034] Furthermore, a method is proposed by which the machining by the machine tool is not started if a permissible maximum value of the predetermined machining data is equal to or greater than the limit value of the pallet system-specific release data. Short description of the characters Fig. 1: shows schematically the process steps for releasing machining with a machine tool Fig. 2: shows a flowchart of an embodiment for enabling machining with a machine tool Fig. 3: shows a first application example of a release process Fig. 4: shows a second application example of a release process Fig. 5: shows a third application example of a release process Fig. 6: shows a flowchart of another embodiment for enabling machining with a machine tool Fig. 7: shows a fourth application example of a release process Fig. 8: shows a fifth application example of a release process Fig. 9a: shows the underside of a pallet in an oblique view Fig. 9b: shows a detailed view of a pallet in oblique view Fig. 10a: shows a representation of a receiving area of ​​a machine tool in an oblique view Fig. 10b: shows a detailed view of a receiving area of ​​a machine tool in an oblique view Detailed description of the characters

[0035] In the following, exemplary embodiments of the present invention are described in detail with reference to exemplary figures. The features of the exemplary embodiments can be combined in whole or in part, and the present invention is not limited to the described exemplary embodiments.

[0036] Fig. 1 schematically shows the process steps of the release process for starting machining on a machine tool 6. The illustration shows the preparation process that a pallet system goes through, starting with the human-machine interface 10. A pallet 1 for holding one or more workpieces 3 is assigned to a production process and moved to a setup station. The pallet 1 comprises at least one superstructure. A superstructure can, on the one hand, be fastening elements such as claws, chucks, clamps, or clamping bridges. On the other hand, the term superstructure can also include the workpiece 3, which can enter the initial process as an unmachined blank or has already undergone machining steps. The workpieces 3 are moved into the workpiece holder 4 at the setup station. A workpiece holder 4 can, for example, be a clamping element to which the workpiece 3 is fastened with a defined clamping force.The combination of the material of the workpiece 3 with the clamping force results, for example, in a maximum permissible spindle speed of the machine tool 6. For example, it is also conceivable that the entire pallet system, including the machining superstructures, is moved, such as linearly or rotationally. The user can collect this information at the setup station and transfer it to a human-machine interface 10, such as a computer with a keyboard or a tablet. The pallet system-specific release data is written to the rewritable data storage device 2 using the data writing device 8.

[0037] The pallet system can consist of at least one pallet 1, at least one rewritable data storage device 2, and at least one superstructure. A pallet 1 is practical for handling workpieces, among other things, in a manufacturing process with multiple production steps. The rewritable data storage device 2 can be implemented, for example, as an RFID tag, flash memory, or e-paper. The pallet system-specific release data can be stored on the rewritable data storage device 2. Superstructures include, for example, workpieces 3 and / or workpiece holders 4 such as clamps, screw connections, threads, or clamping devices.

[0038] The data storage device 2 is, for example, an RFID tag, and in an optional version, it has a diameter of 20 mm and a thickness of 3 mm. The tag contains a non-volatile, rewritable memory chip. The chip can, for example, have a capacity of 2048 bytes. The electronics are encapsulated in a polyphthalamide (PPA) casing, which ensures resistance to liquids such as coolants or lubricants. Furthermore, the tag can include a coil that serves as an antenna for both power supply and data transmission.

[0039] Alternatively or additionally, a USB storage device could be used, which establishes a wired data exchange with the control unit 7 when the pallet system is inserted into the receiving area 13. Alternatively, a rewritable e-paper display, which stores and displays information in a 2D code, could also be used. The reading and writing devices 8 would need to be adapted accordingly.

[0040] After the write process (which is preferably performed at the setup station), the pallet system can be stored. If the resource management system has assigned a machine tool 6 to the pallet system, it is moved to the receiving area 13 of the machine tool 6.

[0041] At a time that is directly related to the arrival of the pallet system in the receiving area 13, the data reading device 9 reads the pallet system-specific release data from the rewritable data memory 2 and makes the pallet system-specific release data available to the control unit 7.

[0042] Fig. Figure 1 shows the generation of the predetermined machining data, starting with the human-machine interface 11. For example, a user entrusted with programming the machine tool 6 enters the predetermined machining data into the human-machine interface 11. Alternatively, the predetermined machining data can be generated automatically after programming. This task can be performed by an IT system with or without subsequent user control. Alternatively, the generation of the predetermined machining data could be generated in the same work step with the pallet system-specific release data. A user input can (optionally) control the writing of the rewritable data memory 2, and also make the predetermined machining data available to the control system.

[0043] In the next step, the predetermined machining data are transferred to a cloud storage 12. There, the predetermined machining data are available to the control unit 7. Alternatively, the predetermined machining data can be transmitted directly to the control unit 7, or the human-machine interface 11 could be part of the unit consisting of the machine tool 6 and the control unit 7.

[0044] The Fig. Figure 2 shows the process steps of the release process as a flowchart. The first column shows steps S1.1 to S1.3 of the pallet system-specific release data up to comparison step S3, and the second column shows steps S2.1 to S2.3 of the predetermined processing data.

[0045] In step S1.1, the pallet system-specific release data is transferred to Fig. 1, for example, by a user. Subsequently, the pallet system can be stored or, for example, moved to another location until it is moved to the receiving area 13 of the machine tool 6 in step S1.3. The pallet system-specific release data is read from the rewritable data memory 2 of the pallet system into the control system. Reading is performed, for example, by the data reading device 9. The data can remain on the data memory or be deleted after successful transfer.

[0046] In the second column, steps S2.1 to S2.3 up to the comparison step S3 of the predetermined processing data are explained. The predetermined processing data are, as Fig. 1, is generated in step S2.1. In step S2.2, the predetermined processing data are transferred to a storage unit to be read into the control system in step S2.3. Steps S2.2 and S2.3 can also be skipped depending on the system architecture.

[0047] In step S3, the pallet system-specific release data and the predetermined machining data are compared. In the control unit 7, the data are compared. On this basis, the machining process is released, if necessary, with restrictions, or the start is denied S4 (optionally, however, depending on the result of the comparison, only certain speeds and / or functions can be released). Therefore, even before machining begins, an automated so-called two-factor authentication can be performed based on the data of the machine tool (control system) and the data of the inserted pallet system. This is preferably performed automatically when the pallet system is inserted (e.g., as soon as the pallet system is in the machine tool's workspace).For example, processing can only be approved once it has been confirmed (e.g., by comparing UIDs as two-factor authentication) whether all correct elements of the pallet system, such as pallets, mounting elements, etc., are present and no incorrect elements are present in the pallet system. The information to be compared can particularly advantageously include at least a permissible speed, a machining type (such as milling or turning), and the type or design of the clamping device. In an advantageous further development, a sensor matrix with unique assignments can be used to check the consistency of the data in combination with the signals generated by the clamping device / pallet / workpiece carrier. Different speeds and functions can be approved separately.

[0048] This allows for clear management of various information about pallets, clamping devices on pallets, and workpiece carriers, for example, reducing the permissible speed according to operator input (the system can be used on stand-alone machines and machines with any automation, including robot loading and pallet storage), and reducing the clamping force with a corresponding reduction in the speed at the machine table. This allows for clear assignment of pallets, workpiece carriers, and clamping devices on linked machines within the system.

[0049] In Fig. 3, the release process is explained using an example. The pallet system-specific release data includes identification data, configuration data, and critical information. The identification data primarily serves the purpose of identification. In this example, a unique identification number was assigned to the pallet system, which enables unambiguous identification. In this example, the identification data is not independently configured to release the start of processing. For example, using an inventory management system, additional data linked to the identification data can be obtained. Furthermore, the pallet system-specific release data includes configuration data, such as the spindle speed N in this example. P. In this example, the spindle speed describes the speed at which the milling cutter of machine tool 6 is operated. The spindle speed is set up in such a way that it is used to configure machine tool 6. Furthermore, the pallet system-specific release data includes critical information, such as the clamping force F in this example. P In this example, the critical information regarding the clamping force is a permissible maximum value. This critical information is configured to prevent the machine tool from starting. The spindle speed can also be critical information.

[0050] The predetermined machining data includes configuration data such as the spindle speed N V and the critical information of the clamping force F V .

[0051] In comparison, the comparable data, in this case N P and N V , as well as F P and F Vcompared with each other. The critical information is that a numerical value of the pallet system-specific release data is higher than the comparable numerical value of the predetermined processing data. In the case of the clamping force, the condition F results. P ≥ F V . This condition is met in the specific example. A release can be granted. Furthermore, the configuration data is compared. The spindle speed N P is greater than the spindle speed N V , therefore does not represent a restriction. The maximum spindle speed of the machine tool N M is set to the spindle speed N P The actual spindle speed used determines the programming of the machine tool and can also be lower than N M stand out.

[0052] The Fig. Figure 4 shows another application example. A variation of the first application example concerns the identification data of the pallet system-specific release data. Instead of an identification number, there is a title of the pallet system. The clamping force F P and the spindle speed N V are higher, the spindle speed N P lower than in Fig. 3. The critical information F P and F V are compared with each other. F P is higher than the numerical value of the critical data of the predetermined machining data, therefore a release can be granted. The spindle speed N P the pallet system-specific release data is lower than the spindle speed N V of the predetermined machining data. In order not to exceed the specified value, the maximum spindle speed of the machine tool N M to the value of the pallet system-specific release data, i.e. NP , is fixed. The release is therefore not carried out as intended in the predetermined machining data, but reduced by the parameter of the spindle speed.

[0053] The Fig. Figure 5 shows another application example. Compared to the previous application examples, the pallet system-specific release data and the predetermined processing data contain identification data, configuration data, and critical information for multiple workpieces mounted on a pallet.

[0054] The identification data is used to assign the information to be compared; in this specific example, line by line.

[0055] For the paddle wheel example, the clamping force F is lower than in the last application example. P , higher or equal are the remaining numerical values. A comparison of F P and F Vshows that FP has a low numerical value, which means that machining for the “paddle wheel” workpiece is not enabled.

[0056] The cylinder head example, which is mounted on the same pallet, carries the configuration data and critical information of the example from Fig. 3. The comparison of the critical information results in F P ≥ F V . The release is set by setting the maximum spindle speed with N M = N P granted.

[0057] Another example is shown in Fig. 6. The figure is a flowchart analogous to Fig. 2. The difference lies in the addition of the additional work step S3.2. After comparing the pallet system-specific release data with the predetermined processing data, the possibility of process optimization exists. If necessary, a process classified as not ready for release can be made ready for release by modifying the settings. This can preferably be done automatically, whereby information regarding the modification can be output to the user (and / or directly at the machine tool).

[0058] The Fig. 7 shows an application example for the extended embodiment from Fig. 6.

[0059] In this example, the pallet system contains a clamping device with a unique identification number. This UID is contained in the pallet system-specific release data. The predetermined processing data stipulates that a specific clamping device must be used. This is critical information and should be understood as a limit value.

[0060] The comparison of the pallet system-specific release data with the predetermined processing data shows, analogous to the previous examples, that a release of the processing start is permissible (F P ≥ F V and N P ≥ N V ). In addition, the critical information of the clamping device UID is compared. Since this information is identically contained in the predetermined processing data and the pallet system-specific release data, processing can also be approved in this regard.

[0061] In this example, the simplified assumption of a direct proportional relationship between spindle speed and clamping force is used. The greater the clamping force, the higher the spindle speed may be in this assumption. Furthermore, it is advantageous for machine tool 6, workpiece 3, and other influencing factors to keep the clamping force and speed parameters as low as possible. In the example shown, machining on machine tool 6 could be started as specified by the pallet system-specific release data. Alternatively, the clamping force in the pallet system is set to the value F P ' of the predetermined processing data F V reduced. Accordingly, the spindle speed M M the machine tool to a value N P ' can be reduced. The aforementioned process participants are thus protected compared to the planned processing. The clamping force is actually reduced in this case.

[0062] The Fig. 8 shows a further application example for the extended embodiment from Fig. 6. Deviating from the application example from Fig. 7 is the clamping force F P the pallet system-specific release data is lower than the clamping force F V of the predetermined machining data. Therefore, enabling machining by machine tool 6 is not permitted in the first step.

[0063] The decision data also includes information about the clamping device type, for example. The pallet system-specific release data contains the critical information that the clamping device is a high-speed capable device. According to the predetermined processing data, a high-speed capable clamping device is required to start processing. This criterion is met and does not prevent release.

[0064] As described above, this example assumes a directly proportional relationship between clamping force and permissible spindle speed. The pair of numbers F P and N P a reduced speed N P ' such that the clamping force on the pallet system corresponds to the clamping force F specified from the predetermined processing data V is at least equivalent. The spindle speed of machine tool 6 is set to N M = N P ' The clamping force F P is actually not increased in the example shown. Despite the insufficient numerical values ​​of the pallet system-specific release data, processing can be started with restrictions.

[0065] The Fig. Figure 9a shows the underside of a pallet 1 in an oblique view. Attachments such as clamping devices or workpieces 3 can be attached to the side of the pallet 1 facing away from the viewer. At the top of the figure, grooves for inserting T-nuts can be seen in the side surface. These, in turn, can accommodate auxiliary elements such as clamps for clamping workpieces.

[0066] Centrally located in area A is the Fig. 9a shows the center piece. Four pull studs 16 are located around the perimeter, which center and secure the pallet 1 in the receiving area 13 of the machine tool 6. Outside these, in turn, are recesses for reducing mass and balancing the pallet 1. The geometry of the underside of the pallet 1 is designed to prevent incorrect assembly with regard to orientation.

[0067] The detailed view of area A is shown in Fig. 9b is shown enlarged. The centerpiece comprises several screw connections that connect the centerpiece to the main component of pallet 1. Data and / or energy can be transferred to and / or from pallet 1 via the interfaces 14 of pallet 1. A rewritable data storage device 2 is located on the underside. The rewritable storage device 2 is arranged so that it is freely accessible, for example, for maintenance and for free transmission for writing or reading.

[0068] In Fig. 10a, the receiving area 13 of the machine tool is formed as a counterpart to the pallet 1 from the Fig. 9a and Fig. 9b. The clamping cones 17 engage the pull studs 16 and clamp the pallet 1 automatically, reproducibly and stationary in the receiving area 13 of the machine tool. Fig. 10b represents area A analogous to the Fig.9b is an enlarged view. The counterpart to the interfaces of the pallet 14 are the interfaces of the machine tool 15. These are docked together for signal and / or energy transmission.

[0069] The data reading device 9 is integrated into the receiving area 13 of the machine tool 6. This is designed openly to enable wireless data transmission.

[0070] Existing features, components, and specific details may be exchanged and / or combined to create further embodiments, depending on the required application. Any modifications within the scope of the knowledge of the person skilled in the art are implicitly disclosed in this description. Reference symbol 1 pallet 2 rewritable data storage 3 Workpiece 4 Workpiece holder 6 Machine tool 7 Control unit 8 Data writing device 9 Data reading device 10, 11 Human-Machine Interface 12 Cloud storage 13 Recording area 14 Interface Palette 15 Machine tool interface 16 pull studs 17 clamping cone

Claims

[1] Control system for a machine tool (6), having a receiving area (13) for receiving a pallet system, which comprises at least one pallet (1) and pallet system-specific release data; wherein the control system comprises: predetermined processing data on the control system side for enabling processing on the machine tool (6), wherein the control system is set up, when the pallet system is picked up in the receiving area (13), to read the pallet system-specific release data from a data carrier of the pallet system and to compare them with the predetermined processing data of the control system in order to release processing on the machine tool (6). [2] Control system according to claim 1, further comprising a data reading device (9) which is arranged to read the pallet system-specific release data when the pallet system is received in the receiving area (13). [3] Control system according to at least one of the preceding claims, wherein the predetermined processing data comprise at least configuration information of the machine tool (6) and wherein the configuration information comprises permissible and / or set working ranges of the machine tool (6). [4] Control system according to at least one of the preceding claims, wherein a parameter of the predetermined processing data is set to a setting value of the pallet system-specific release data if the parameter of the predetermined processing data is greater than the corresponding parameter of the pallet system-specific release data. [5] Control system according to at least one of the preceding claims, wherein the predetermined machining data contain limit values ​​for preventing the machining start of the machine tool (6). [6] Control system according to at least one of the preceding claims, wherein the processing is not started if at least one limit value of the predetermined processing data is greater than a permissible maximum value of the pallet system-specific release data. [7] Control system according to at least one of the preceding claims, wherein the control system is configured to compare a unique identifier contained in the pallet system-specific release data with a predefined comparison parameter of the predetermined processing data. [8] Control system according to at least one of the preceding claims, wherein the predetermined processing data are provided on a cloud basis. [9] Control system according to at least one of the preceding claims, wherein the predetermined processing data are generated automatically. [10] Control system according to at least one of claims 2 to 9, wherein the data reading device (9) is part of an RFID system. [11] Pallet system comprising: a pallet (1); at least one structure; and a rewritable data memory (2) which is integrated into the pallet (1); and which stores pallet system-specific release data for releasing a machining operation on the machine tool (6). [12] Pallet system according to claim 11, wherein the structure comprises a workpiece (3) and / or at least one clamping means. [13] Pallet system according to at least one of claims 11 to 12, wherein the pallet system-specific release data contain identification data for the unique identification of the pallet system. [14] Pallet system according to at least one of claims 11 to 13, wherein the pallet system-specific release data comprise permissible maximum values ​​of one or more elements of the pallet system. [15] Pallet system according to at least one of claims 11 to 14, wherein the pallet system-specific release data contain configuration data for setting the control parameters of the machine tool (6). [16] Pallet system according to at least one of claims 11 to 15, wherein the pallet system-specific release data comprises a plurality of unique identifiers, UIDs; and / or wherein the pallet system-specific release data contains permissible maximum values ​​for preventing the start of machining of the machine tool. [17] Pallet system according to at least one of claims 11 to 16, wherein the rewritable data memory (2) is part of an RFID system. [18] Method for controlling a machine tool (6), the method comprising the steps of: Reading the pallet system-specific release data from a rewritable data memory (2) of a pallet system that is present in the receiving area (13); Comparing the pallet system-specific release data with predetermined machining data in order to release machining of the machine tool (6). [19] Method according to claim 18, wherein a parameter for machining the machine tool (6) is set to a value of the configuration information of the pallet system-specific release data when the value of the configuration information of the predetermined machining data is equal to or greater than the value of the configuration information of the pallet system-specific release data. [20] Method according to at least one of claims 18 or 19, wherein the processing is not started if a permissible maximum value of the predetermined processing data is equal to or greater than the limit value of the pallet system-specific release data. [21] Computer-based method which, when applied to a computing unit which can be controlled by the control system according to claim 1, causes the control system according to claim 1 to carry out at least the method steps according to claim 18.

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