EP3639942A1 - Press machine with sensor system for the automated detection of a press jaw system - Google Patents

Abstract

The present invention relates to a press machine 10 for plastically deforming a tubular workpiece 30, in particular a fitting, the press machine having a press jaw receptacle 12 for coupling a press jaw arrangement 20 to the press machine. The press machine further comprises a drive 14, which is set up to drive a coupled press jaw arrangement 20 in order to apply a force to the workpiece 30, and a sensor system 40, which is set up to identify a press jaw arrangement 20 and to provide corresponding sensor data, a controller being set up for this purpose to control the drive based on the sensor data.

Description

1. Technical field

The present invention relates to a press machine for plastically deforming a tubular workpiece, in particular a fitting. The invention further relates to a method for operating such a press machine, a press jaw arrangement for coupling to a press machine, and also a tubular workpiece, in particular fitting.

2. Technical background

A number of methods for connecting tubular workpieces are known in the prior art. For example, pipes can be soldered or welded together. It is also known to insert the end of a small pipe into a pipe end of a larger pipe and then to press both pipe ends together.

In other cases, the pressing is carried out using a (press) fitting. For this purpose, press machines, such as pipe press machines, can be used to connect a pipe to a press fitting. Such a fitting can be configured, for example, as a pipe fitting, which can be used as a connecting piece of a pipe. A fitting can consist of different materials, for example copper, aluminum, plastic, composite and / or (stainless steel).

A (pipe) press machine can press jaws made of metals such as steel, aluminum or the like. include, which may be interchangeable. Furthermore, the pressing machine can comprise an exchangeable pressing tongs which have the pressing jaws. Other press jaw assemblies, including press jaws, are also known. By means of the press jaws or the press jaw arrangement, a force can be exerted on the fitting in order to deform it plastically in such a way that the fitting is as possible is tight, tight and tight against a pipe. When using such a press machine, the press jaws can be pressed together in order to press a fitting arranged in between over a pipe. The press machine can be hand-held and operated by a drive. Electrical and / or hydraulic drives are typically used.

The press jaws or the press jaw arrangement are typically workpiece-specific. For example, other pressing jaws / pressing jaw arrangements are used for pressing metal fittings, such as copper or (stainless steel) fittings, than when pressing plastic fittings. The press machine can be adapted to different workpieces, in particular fittings, by exchanging the press jaws / press jaw arrangement. Typically, when using such conventional pressing machines, the pressing is always carried out using the maximum pressing force, irrespective of the actually used pressing jaws or the used pressing jaw arrangement and / or the fittings used. However, this can be disadvantageous since, for example, plastic fittings can be pressed with a much lower pressing force than metal fittings. Applying the maximum pressing force thus leads to an unnecessary waste of energy.

In addition, each type of press jaw or press jaw arrangement used has its characteristic press characteristics. The pressing characteristics can depend, for example, on the transmission ratio of the pressing jaw arrangement, the material of the pressing jaws and the workpiece to be pressed. For example, a workpiece, such as a steel fitting, should be pressed differently than a plastic fitting, for example, in order to guarantee the best possible form fit and a long durability of the pressed fitting.

The present invention is therefore based on the object of achieving the most optimal and material-friendly pressing of a fitting with a pipe. In particular, an improved (pipe) press machine is to be provided, which enables such pressing. These and other tasks that will become apparent to those skilled in the art from the following description are achieved by a press machine according to claim 1, a method for operating a press machine according to Claim 13, a press jaw arrangement according to claim 14 and a tubular workpiece according to claim 15 solved.

3. Description of the invention

The present invention relates to a press machine for plastically deforming a tubular workpiece. The tubular workpiece can be a fitting, for example, and pressed to connect two pipes. The fitting can consist, for example, at least partially of copper, aluminum, plastic, composite and / or (stainless steel). The press machine in turn can be set up to plastically deform such a tubular workpiece, such as a fitting, for example, that it is connected to a piece of pipeline arranged in the fitting. In particular, a (compression) pressing can be carried out by means of the pressing machine in order to connect a fitting with a pipe in a non-detachable manner and / or in a non-positive manner. The fitting can be specified, for example, according to the standard DIN EN 1254-7.

The press machine further comprises a press jaw receptacle for coupling a press jaw arrangement to the press machine. The press jaw receptacle couples to the press jaw arrangement in such a way that the press machine can drive press jaws of the press jaw arrangement. For example, the coupling takes place via at least one coupling bolt. The press jaws of the press jaw arrangement can be arranged to be movable relative to one another and, for example, can be closed and also moved apart, so that in the moved-apart state, for example, a tubular workpiece, such as a fitting, can be arranged between the press jaws. The press jaws of the press jaw arrangement can be exchangeable. Different press jaw arrangements and / or press jaws can be designed for different tasks, such as pressing, crimping, or cutting. A press jaw arrangement typically comprises at least two press jaws.

The press machine further comprises a drive, which is set up to drive the press jaw arrangement in order to apply a force to the workpiece. The drive can comprise an electric motor, a pneumatic and / or a hydraulic drive unit and a gear. By means of the drive, the press jaws of the press jaw arrangement can be moved relative to one another and driven, for example, into the closed state. The drive can at least partially apply the force necessary to deform the tubular workpiece, for example to connect a fitting to a pipe section.

For this purpose, the drive can be connected to the press jaw arrangement directly or via a gear in order to transmit the driving force to the press jaw arrangement and the press packs. The force acting on the press jaws or the press jaw arrangement can be variably adjusted, for example by correspondingly varying motor parameters or other parameters (such as gear settings).

Furthermore, the press machine comprises a sensor system which is set up to identify a press jaw arrangement and to provide corresponding sensor data. The sensor system can be set up to recognize an individual press jaw arrangement, or also to recognize a press jaw arrangement according to its type. For this purpose, the sensor system can include detection means (e.g. a sensor) as an interface to the press jaw arrangement, and corresponding evaluation means, which can include a processor and / or memory with the appropriate program code. The detection means can be provided separately from the evaluation means on the press machine. The sensor system can be supplied via an energy source arranged on the press machine, which can also feed the drive or the electric motor, for example. The sensor system can also be activated by a user / operator using a button in order to carry out the identification. This enables targeted control of how and when the identification should take place. Furthermore, the sensor system can be set up to recognize an exchange and in particular the coupling of a press jaw arrangement to the press jaw receptacle and to carry out the identification after recognizing the exchange or the coupling.

The identification therefore does not necessarily mean that an individual press jaw arrangement is identified as an individual press jaw arrangement. Rather, it suffices that a press jaw arrangement is identified or recognized as being different from another press jaw arrangement. In the course of identification, the press jaw arrangement can be classified, for example, on the basis of its model number. In one example it can thus be recognized that a press jaw arrangement for pressing stainless steel fittings with a diameter of 15 mm is present and / or is coupled. Resulting sensor data can characterize the identified press jaw arrangement.

Furthermore, the press machine includes a controller that is set up to control the drive based on the sensor data.

Depending on the identified press jaw arrangement, the drive is controlled accordingly. Depending on which press jaw arrangement or which type of press jaw arrangement has been recognized, the press jaw arrangement can, for example, be driven differently by the drive in order ultimately to optimally deform the workpiece.

The present invention thus makes it possible to carry out the shaping as a function of the coupled pressing jaw arrangement. As a result, depending on the type of press jaw arrangement used, an individual pressing force can be applied by means of the drive in order to achieve an optimal and gentle deformation of the workpiece. The use of the sensor system allows the press jaw arrangement to be automatically identified and corresponding data to be passed on to the drive, so that the user or operator of the press machine does not have to make any entries himself and accordingly is not additionally burdened. This can reduce the risk of incorrect operation.

The press machine preferably comprises a storage medium with a database. The database preferably includes, for a plurality of press jaw arrangements, specific control parameters for controlling the press machine. Furthermore, the controller can then control the drive according to the at least one specific control parameter. According to the identification of the press jaw arrangement, corresponding control parameters can thus be loaded from the memory or from the database and used to operate the drive. For example, control parameters for a press jaw arrangement for stainless steel fittings and different control parameters for a press jaw arrangement for copper fittings can be stored in the database. Depending on whether a pressing jaw arrangement for stainless steel or copper fittings has been identified by means of the sensor system, the corresponding control parameters can be loaded from the database and used by the control to control the pressing machine and ultimately the drive. Corresponding control parameters can be stored in the database for different characteristics of the press jaw arrangements (for example transmission ratio, type of press jaws, size of the workpiece to be pressed, material of the workpiece to be pressed, and / or shape of the workpiece to be pressed) to enable optimal pressing or deformation of the respective workpiece. In a preferred embodiment, the database can be accessed via a (wired or wireless) interface, for example to update the content of the database.

The control parameters particularly preferably include press parameters, which preferably include a maximum press force, a press speed, press travel and / or a press duration. Depending on the type of press jaw arrangement or the type of workpiece to be pressed by means of the press jaw arrangement, certain press forces, press speeds, press paths and / or press durations can be specified, for example, which are to be used by the press machine for pressing or deforming the fitting with the pipe section, for example. These parameters can be specified, for example, in the form of a pressing curve, which specifies a time course of the pressing force, pressing path and / or pressing speed. The person skilled in the art understands, depending on the intended use of the press machine, to store corresponding control parameters in the database. Furthermore, the control parameters can in particular include drive parameters, which in particular include a drive speed, drive power and / or an oil pressure. Depending on the type of press jaw arrangement or the type of workpiece to be pressed by means of the press jaw arrangement, various drive parameters can thus be stored in the database, which can be loaded based on the identified press jaw arrangement in order to ultimately deform the workpiece. The person skilled in the art understands that the pressing parameters or drive parameters can include motor and / or transmission parameters which can regulate the power transmission from the drive to the pressing jaws.

In addition, the sensor system can comprise at least one optical sensor, a contact-based sensor, an inductive sensor and / or capacitive sensor, wherein the sensor system can in particular be set up to read an RFID and / or NFC transponder. In particular, the sensor system can alternatively or additionally be set up to read a bar code or a QR code. Furthermore, the sensor system can comprise a Bluetooth module, which is set up to read out a corresponding Bluetooth module.

The use of an optical sensor or a contact-based sensor enables the provision of an inexpensive sensor system. A Contact-based sensor can include an electrical contact that comes into contact with a corresponding electrical contact of the pressing jaw / pressing jaw arrangement in order to identify the pressing jaw / pressing jaw arrangement.

The use of an inductive and / or capacitive sensor enables reliable identification, since inductive and / or capacitive sensors are less susceptible to contamination, such as optical or contact-based sensors. The RFID and / or NFC transponder or the corresponding Bluetooth module can have an identifier that is read out during identification. This identifier is characteristic of the type of press jaw arrangement or for an individual press jaw arrangement and can include, for example, a serial number and / or a type number. The control parameters can then be determined on the basis of the identifier read out and the database. Likewise, the RFID and / or NFC transponder or the corresponding Bluetooth module can include the control parameters themselves. These can then be read out during identification and passed on to the controller. As a result, the database of the press machine does not necessarily have to be updated if new or additional press jaw arrangements are to be used. The press jaw arrangement carries the necessary control parameters in the RFID and / or NFC transponder assigned to it or in a corresponding Bluetooth module.

RFID (English: radio frequency identification) enables the identification of the press jaw arrangement by means of electromagnetic waves. The press jaw arrangement can be identified automatically and without contact using RFID technology. An RFID reader (sensor) arranged on the press machine can read out the identifier and / or control parameters, which can be provided by a corresponding RFID transponder of the press jaw arrangement. An RFID transponder can be read out without additional energy being provided. The press jaw arrangement can thus be designed passively and does not require an additional interface or source for providing electrical energy.

NFC technology or near field communication is an international transmission standard based on RFID technology for the contactless exchange of data via electromagnetic induction or capacitive transmission. The communication between the corresponding NFC participants can be active-passive or also active-active. In the present case, the active part, ie the part that is supplied with electrical energy, is preferably provided in the press machine, the passive part on the press jaw arrangement. The press jaw arrangement can thus be designed passively and does not require an additional interface or source for providing electrical energy.

Bluetooth communication enables data transmission between devices over a short distance using radio technology. Communication takes place using an appropriately developed industry standard, for example in accordance with the IEEE 802.15.1 standard.

In particular, a first reading range of the sensor system can be limited and be at most 0.3 m, preferably at most 0.2 m and most preferably at most 0.1 m. Furthermore, the first reading range of the sensor system can be selected such that only a coupled press jaw arrangement can be identified. Limiting the first reading range prevents an incorrect press jaw arrangement located in the vicinity of the press machine from being inadvertently identified. For example, the press machine is provided together with a plurality of press jaw arrangements in a transport case or on a workbench. When the press machine is started up, only the coupled or the press jaw arrangement to be coupled should be identified. This can be ensured by limiting the first reading range.

Furthermore, the sensor system can be set up to identify a workpiece, the storage medium comprising a database which comprises at least one specific control parameter for a plurality of workpieces, the controller being set up to control the drive according to the at least one specific control parameter.

The drive is controlled accordingly depending on the workpiece identified. Depending on the type of workpiece or the type of workpiece that has been recognized, the press jaws can be driven differently by the drive, for example, in order to ultimately optimally deform the workpiece. Both the type of workpiece and the type of press jaw arrangement can be taken into account when selecting the control parameters. In particular, it can be checked whether the identified pressing jaw arrangement matches the workpiece to be pressed. If this is not the case, an alarm can be triggered issued in order to avoid faulty pressing and / or damage to the press machine. The control parameters can also be adapted to the identified workpiece, thus avoiding excessive pressing. If, for example, a press jaw arrangement for pressing stainless steel fittings is coupled to the press machine and the workpiece to be pressed is a copper fitting, an excessive press force would be applied if only the type of press jaw arrangement was taken into account. If, on the other hand, the type of workpiece is also recognized, the pressing force can be reduced accordingly and the workpiece can be pressed with the supposedly unsuitable pressing jaw arrangement - but with a reduced pressing force.

The present invention thus allows the deformation to be carried out as a function of the object to be deformed and the press jaw arrangement used. As a result, depending on the type of workpiece used or the coupled pressing jaw arrangement, an individual pressing force can be applied by means of the drive in order to achieve an optimal and gentle deformation without damaging the workpiece or the pressing machine.

A second reading range for identifying the workpiece can preferably be in the range from 0 meters to 5 meters, more preferably in the range from 0.01 meters to 2 meters, further preferably in the range from 0.02 meters to 1 meter and further preferably in the range from 0 .05 meters to 0.5 meters. The sensor system can therefore only identify workpieces that are within the second reading range. This enables only those workpieces that are actually to be deformed to be identified. This at least partially prevents accidental identification of workpieces that are far away and cannot be deformed. Depending on the sensors used, the first and the second reading range can be different.

The sensor system is preferably set up to identify features of characteristic features of the workpiece, in particular of characteristic geometric features of the press jaw arrangement and / or of a workpiece. For example, a shape and / or size of at least part of the press jaw arrangement and / or the workpiece can be recognized by means of the sensor system. On the basis of these characteristic features, the pressing jaw arrangement and / or the workpiece can be identified, at least according to their type, and the drive can then be controlled accordingly to optimally deform the workpiece.

In a preferred embodiment, the sensor system comprises a sensor such as a camera, an optical scanner, an RFID reader, an NFC reader and / or a Bluetooth module for identifying the workpiece. The same sensor or different sensors or sensor types can be used to identify the workpiece and press jaw arrangement. The camera can be an optical camera, which can have sufficient resolution and quality to identify the workpiece, at least according to its type. For example, a fitting with a diameter of 15 mm can be identified using the camera. Color values can also be used to infer the material of the workpiece. By means of the optical scanner, the RFID reader, the NFC reader and / or the Bluetooth module, data or identifications can be recognized, which can be provided by the workpiece itself or the press jaw arrangement, for example, and allow the workpiece to be identified . For example, the optical scanner can recognize a barcode or QR code that is arranged on the workpiece. To ensure identification by means of an optical camera or optical scanner, a lamp can also be provided on the press machine, which can at least partially illuminate or illuminate the area that can be detected by the camera or by the scanner.

The sensor system is preferably set up to recognize a barcode on the workpiece, a QR code on the workpiece, an identifier in an RFID transponder on the workpiece, an identifier in an NFC transponder on the workpiece, and / or an identifier in one Bluetooth module on the workpiece. The person skilled in the art understands that the workpiece can be equipped with corresponding codes or transponders or modules in order to provide the press machine with appropriate data for identifying the workpiece, at least according to its type.

Furthermore, the sensor of the sensor system can be arranged directly on the press jaw holder. In a preferred embodiment, the sensor is at least partially covered by an element of the press machine in a first configuration of the press machine, and is released by the element in a second configuration of the press machine. For example, a sensor of the sensor system can be covered by part of the housing of the press machine, whereby the sensor can be protected against dirt or other environmental influences. When the press jaws are moved apart or opened, which can correspond to the second configuration, the sensor is (at least partially) released or exposed. The press jaw arrangement and / or the workpiece can now be identified by means of the sensor system. When the workpiece is subsequently deformed, the press jaws are moved towards one another or brought into the first configuration, as a result of which the sensor can again be at least partially covered by part of the housing. This also ensures that the identification by means of the sensor system only takes place if the workpiece is to be deformed. This prevents the wrong identification of a workpiece that is nearby (e.g. lying on a workbench).

The press jaws of the press jaw arrangement and particularly preferably the entire press jaw arrangement are preferably free of the sensor system. Thus, according to this exemplary embodiment, no elements of the sensor system are arranged on the press jaws or the press jaw arrangement. The sensor system can thus, for example, be arranged exclusively on or in a hand part of the press machine. This enables the press jaws or the press jaw arrangement to be easily exchanged. In another preferred embodiment, the sensor system is at least partially arranged on the press jaws or the press jaw arrangement, in particular in a depression of the press jaws (for example to protect the sensor system). The sensor system can be connected to the motor of the press machine via a coupling interface.

The sensor system is preferably at least partially arranged in a housing of the press machine. If the sensor system is set up to read an RFID and / or NFC transponder, or if it comprises a Bluetooth module, the sensor system can be arranged entirely within the housing of the press machine. The housing of the press machine is at least partially permeable to the readout data. In particular, the housing material can comprise glass, ceramic, plastics or composites which are at least partially transparent to electromagnetic radiation. Likewise, the housing can have suitable cutouts to enable reading. With this arrangement, the sensor system can be protected against contamination or other environmental influences, since it is at least partially shielded by the housing of the press machine.

Particularly preferably, the press jaw arrangement can at least partially cover the sensor of the sensor system when the press jaw arrangement is coupled to the press jaw receptacle, the sensor being at least partially uncovered when no press jaw arrangement is coupled to the press jaw receptacle. Thus, the sensor system or the sensor can be protected against contamination or other environmental influences. In addition, the reading accuracy of the sensor system can be increased since the sensor system or the sensor of the sensor system is set up directly adjacent to the coupled pressing jaw receptacle and is not covered by other parts, such as a housing part. This means that a very small maximum first reading range can be achieved and the risk of incorrect identification of adjacent, non-coupled press jaw receptacles can be reduced.

The press machine preferably comprises a log memory set up for storing the sensor data and control data. As a result, the coupling process and / or the deformation process can be made traceable. All or some of the data relating to the coupling process and / or the deformation process can be stored in the log memory, for example to enable quality monitoring of individual deformations. The log memory can be accessed via a (wireless or wired) interface to read out the corresponding data.

The present invention further relates to a method for operating a press machine according to the above statements, for plastically deforming a tubular workpiece, such as a fitting. The method comprises the following steps: coupling a press jaw arrangement to the press jaw holder of the press machine; Identifying the press jaw arrangement by means of the sensor system and preferably identifying the workpiece; Gripping the workpiece with the coupled press jaw assembly; Controlling the press machine according to the identified press jaw arrangement and preferably according to the identified workpiece, in order to apply a force by means of the press jaw arrangement to the surface of the gripped workpiece in order to plastically deform the workpiece.

The pressing jaw arrangement can be identified after the coupling or before the coupling, in particular during the coupling. To generate the force, the drive of the press machine can be controlled accordingly. It can depend a reduced or increased pressing force, pressing duration and / or pressing speed can be set from the identifying step, depending on which pressing jaw arrangement or which workpiece type has been identified.

According to the present invention, in particular the method steps of identifying, gripping and / or controlling can be implemented in a computer program, wherein the computer program can cause a corresponding press machine system to carry out the respective steps.

The present invention further relates to a press jaw arrangement for coupling to a press machine for plastically deforming a tubular workpiece, in particular a fitting. For example, this press jaw arrangement can be coupled to a press machine according to the above statements. The press jaw arrangement comprises a marking which is set up to be identified by the sensor system of the press machine, the marking preferably comprising an RFID transponder or an NFC transponder. The marking is preferably arranged in a depression of the press jaw arrangement in order to protect it from dirt, damage and other environmental influences. In particular, the depression can be sealed. For example, the depression, including the marking, can be sealed with a plastic, such as an epoxy resin, glass or ceramic. The sealing material can completely enclose and / or cover the marking.

The present invention further relates to a tubular workpiece, in particular fitting, which is set up for plastic deformation by a press machine. The tubular workpiece can be deformed for example by a press machine according to the above statements. The workpiece, in particular fitting, can be configured in accordance with the above explanations and can consist of copper, plastic, composite, and / or (stainless steel). The tubular workpiece comprises a means which is set up to provide an identifier for identifying the workpiece. According to the above statements, the means can be configured, for example, as a barcode or QR code. In particular, the means can comprise a transponder, in particular an RFID or NFC transponder, which is set up to provide the identifier.

4. Description of preferred embodiments

Figur 1

eine Explosionsansicht eines Pressmaschinensystems, umfassend eine Pressmaschine und eine Pressbackenanordnung gemäß einer Ausführungsform der vorliegenden Erfindung;

Figur 2

eine Pressbackenanordnung mit Pressbacken gemäß einer Ausführungsform der vorliegenden Erfindung;

Figur 3

ein rohrförmiges Werkstück gemäß einer Ausführungsform der vorliegenden Erfindung, und

Figur 4

eine schematische Darstellung eines Pressmaschinensystems, umfassend eine Pressmaschine, eine Pressbackenanordnung und ein rohrförmiges Werkstück gemäß einer Ausführungsform der vorliegenden Erfindung.

The present invention is described in more detail below with reference to the accompanying figures. The same elements are provided with the same reference numerals. Show it:

Figure 1

an exploded view of a press machine system comprising a press machine and a press jaw assembly according to an embodiment of the present invention;

Figure 2

a press jaw assembly with press jaws according to an embodiment of the present invention;

Figure 3

a tubular workpiece according to an embodiment of the present invention, and

Figure 4

is a schematic representation of a press machine system comprising a press machine, a press jaw assembly and a tubular workpiece according to an embodiment of the present invention.

In Figure 1 A press machine system 1 is shown, which comprises a press machine 10 and a press jaw arrangement 20 according to an embodiment of the present invention as well. The press machine 10 comprises a hand part 11, which can be guided by an operator or user. The pressing jaw arrangement 20 can be detachably coupled to the hand part 11. The press jaw arrangement 20 comprises two press jaws 21a, 21b by means of which a workpiece (fitting) can be gripped and plastically deformed. For this purpose, a drive 14, such as an electric motor with a transmission, is provided in the hand part 11, which drive the press jaw arrangement 20 via a coupling interface and can ultimately move the press jaws 21a, 21b in order to deform the fitting. To start the deformation process of the fitting, an operator can actuate a corresponding actuation lever 13: By actuating the lever 13 accordingly, the press jaws 21a, 21b are first moved apart to grip a fitting and then pressed together to deform the fitting. The coupling of the pressing jaw arrangement 20 to the pressing machine 10 takes place via the pressing jaw receptacle 12, which can for example comprise a bolt.

A sensor system 40 (cf. Fig. 4 ) provided. In this exemplary embodiment, the sensor system comprises an inductive and / or capacitive sensor and is in particular set up for reading out an RFID and / or NFC transponder 22. By actuating the lever 13 to move the pressing jaws 21a, 21b apart to grip a fitting, the sensor system 40 is activated. Likewise, the sensor system 40 can be activated when a press jaw arrangement 20 is coupled to the press jaw receptacle 12. In the activated state, the sensor system 40 can for example recognize and read out an identifier from a corresponding press jaw arrangement 20. The identifier can be stored in a transponder 22. Likewise, the transponder can have stored control data that can be read out by the sensor system 40. On the basis of this identifier, the pressing jaw arrangement 20 can be identified by means of the sensor system 40. In addition, the sensor system 40 can identify a workpiece type. Furthermore, when the lever 13 is actuated appropriately, the drive 14 is driven in order to exert a force on the fitting arranged between the press jaws 21a, 21b. For this purpose, the drive 14 is controlled depending on which press jaw arrangement 20 or which type of workpiece has been identified.

In the Figure 2 A press jaw assembly 20 with press jaws 21a, 21b is shown in accordance with an embodiment of the present invention. The press jaw arrangement can be detachably coupled to a press jaw receptacle 12 of a press machine 10. A transponder 22 (for example an RFID or NFC transponder) is arranged in a recess 24. If the press jaw arrangement 20 is coupled to the press jaw receptacle 12 of a press machine 10, the sensor system 40 and in particular a sensor of the sensor system is at least partially covered.

In Figure 3 A possible embodiment of a tubular workpiece according to an embodiment of the present invention is shown. The workpiece shown is designed in the form of a fitting 30. The fitting 30 comprise a means 32 for providing an identifier for identifying the respective fitting 30, for example to a press machine 10 according to FIG Figure 1 . That in the Figure 3 Fitting 30 shown comprises an RFID transponder 32, on which at least one identifier is stored. The identifier characterizes the fitting 30 at least according to its type. By means of a corresponding RFID reader on the press machine, such as by means of the Figure 1 described sensor, the identifier stored on the RFID transponder 32 of the fitting 30 can be read out in order to identify the fitting 30.

Figure 4 is a schematic representation of the press machine system 1. The system comprises a press machine 10 with a press jaw arrangement 20 releasably coupled thereto. The press jaws 21a, 21b of the press jaw arrangement 20 have a tubular workpiece 30. The press machine 10 further comprises a hand part 11 for gripping the press machine 10 and a lever 13 for actuating the press machine 10. In addition, the press machine 10 comprises a sensor system 40, which in the present illustration comprises two sensors 42, 44. The sensor 42 serves to identify the press jaw arrangement 20 by means of the transponder 22 and has a maximum first reading range D20. The first reading range D20 of the sensor system is selected such that only a coupled press jaw arrangement 20 can be identified. Limiting the first reading range D20 prevents an incorrect press jaw arrangement located in the vicinity of the press machine 10 from being inadvertently identified. The sensor 44 is used to identify the workpiece 30 by means of the transponder 32. The sensor 44 has a second reading range D30. The second reading range D30 is selected such that the sensor system 40 can only identify workpieces 30 that are in the immediate vicinity of the pressing jaws 21a, 21b and / or are gripped by the pressing jaws 21a, 21b. Furthermore, the sensor system can comprise a sensor which serves both to identify the press jaw arrangement 20 and to identify the workpiece 30.

Furthermore, the press machine 10 comprises a storage medium 18 with a database. The database preferably includes, for a plurality of press jaw arrangements 20 and / or workpieces 30, specific control parameters for controlling the press machine 10. A controller 16 of the press machine 10 can control the drive 14 according to the at least one specific control parameter.

The person skilled in the art understands that individual elements of the above-mentioned exemplary embodiments can be combined or exchanged with one another.

Reference symbol list:

1

Press machine system

10th

Press machine

11

Hand part

12th

Press jaw holder

13

Actuating means

14

drive

16

control

18th

Storage medium

20th

Press jaw arrangement

21a, b

Press jaws

22

Transponder

24th

deepening

30th

Workpiece (fitting)

32

Transponder

40

Sensor system

42, 44

sensor

D20

first reading range

D30

second reading range

Claims (15)

Press machine (10) for plastically deforming a tubular workpiece (30), in particular a fitting, comprising the press machine (10): a press jaw receptacle (12) for coupling a press jaw arrangement (20) to the press machine (10); a drive (14) configured to drive a coupled press jaw assembly (20) to apply a force to the workpiece (30); a sensor system (40) set up to identify a press jaw arrangement (20) and to provide corresponding sensor data; a controller (16) which is set up to control the drive (14) based on the sensor data. Press machine (10) according to claim 1, comprising a storage medium (18) with a database, which comprises at least one specific control parameter for a plurality of press jaw arrangements (20), the controller (16) being set up to drive (14) according to the at least one to control a specific control parameter. Press machine (10) according to claim 2, wherein the control parameters include press parameters, which in particular comprise a maximum press force, a press speed, a press travel and / or a press duration, and / or wherein
the control parameters include drive parameters, which include in particular a predetermined drive speed, drive power and / or a predetermined oil pressure. Press machine (10) according to one of the preceding claims, wherein the sensor system (40) comprises at least one optical sensor, a contact-based sensor, an inductive sensor and / or capacitive sensor (42, 44), and wherein the sensor system (40) in particular for reading an RFID and / or NFC transponder (22, 32) is set up, and / or the sensor system (40) is set up in particular for reading out a bar code or a QR code. Press machine (10) according to one of the preceding claims, wherein the sensor system (40) has a maximum first reading range (D20) of at most 0.3 m, preferably at most 0.2 m and most preferably at most 0.1 m, and / or wherein the first reading range (D20) of the sensor system is selected such that only a coupled press jaw arrangement (20) can be identified. Press machine (10) according to one of the preceding claims, wherein the sensor system (40) is set up to identify a workpiece (30), a second reading range (D30) for identifying the workpiece (30) preferably in the range from 0 m to 5 m, more preferably in the range from 0.01 m to 2 m, more preferably in the range from 0.02 m to 1 m and further preferably in the range from 0.05 m to 0.5 m, and wherein the storage medium (18) is a Database, which comprises at least one specific control parameter for a plurality of workpieces (30), the controller (16) being set up to control the drive (14) according to the at least one specific control parameter. Press machine according to one of the preceding claims, wherein the sensor system (40) for feature recognition of characteristic features of the press jaw arrangement (20) and / or a workpiece (30), in particular of characteristic geometric features of the press jaw arrangement (20) and / or the workpiece (30) is set up. Press machine (10) according to one of the preceding claims, wherein the sensor system (40) is set up to recognize a barcode on the workpiece (30), a QR code on the workpiece (30), an identifier in an RFID transponder on the workpiece (30), an identifier in an NFC transponder (32) on the workpiece (30), and / or an identifier in a Bluetooth module on the workpiece (30). Press machine (10) according to one of the preceding claims, wherein the sensor (42, 44) of the sensor system (40) is arranged directly on the press jaw receptacle (12), and wherein the sensor (42, 44) is preferably an element of the press machine (10 ) in a first configuration of the press machine (10) at least is partially covered, and in a second configuration of the press machine (10) the element releases the sensor (42, 44). Press machine (10) according to one of the preceding claims, wherein the press jaws (21a, b) of the press jaw arrangement (20) and preferably the press jaw arrangement (20) is free of the sensor system (40). Press machine (10) according to one of the preceding claims, wherein the press jaw arrangement (20) at least partially covers the sensor (42, 44) of the sensor system (40) when the press jaw arrangement (20) is coupled to the press jaw receptacle (12), and wherein the Sensor (42, 44) is at least partially uncovered if no press jaw arrangement (20) is coupled to the press jaw receptacle (12). Press machine (10) according to one of the preceding claims, further comprising a log memory configured for storing sensor data and control data. Method for operating a press machine (10) according to one of claims 1 to 12 for plastically deforming a tubular workpiece (30), the method comprising: Coupling a press jaw arrangement (20) to the press jaw receptacle (12) of the press machine (10); Identifying the press jaw arrangement (20) by means of the sensor system (40) and preferably identifying the workpiece (30); Gripping the workpiece (30) with the coupled press jaw arrangement (20); Controlling the press machine (10) according to the identified press jaw arrangement (20) and preferably according to the identified workpiece (30), in order to apply a force by means of the press jaw arrangement (20) to the surface of the gripped workpiece (30) to the workpiece (30) plastically deform. Press jaw arrangement (20) for coupling to a press machine (10) according to one of claims 1 to 12, comprising: a marking which is set up to be identified by the sensor system (40) of the press machine (10), wherein the marking preferably comprises an RFID transponder (22) or an NFC transponder, which is preferably arranged in a recess (24) in the press jaw arrangement (20). Tubular workpiece (30), in particular fitting, set up for plastic deformation by a press machine (10), comprising means (32), preferably transponders, in particular RFID or NFC transponders, set up to provide an identifier for identifying the workpiece (30).

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