Pressing pliers network and method for pressing a workpiece

Abstract

The invention relates to a crimping pliers network (39) which comprises pressing pliers (2), an electronic control unit (31) (in particular a smartphone or a tablet) as well as a data storage device (37) (in particular a cloud storage (38)). According to the invention, a die (3, 4) of the pressing pliers (2) comprises an identifier (18, 19) which can be captured by a capturing device (21) of the pressing pliers. Data (48) from the data storage device (37) and being specific for the captured identifier (18, 19) is provided to the control unit (31). The data might be a desired pressing force curve (49), a desired pressing displacement curve (50) and/or information concerning a workpiece for which the dies (3, 4) are designated. In this way, it is possible to increase the process safety when using the crimping pliers (2). Furthermore, the invention relates to a method for pressing a workpiece.

Claims

1. A pressing pliers network comprising: manual pressing pliers for pressing a workpiece, the manual pressing pliers comprising: hand levers for manually actuating the manual pressing pliers, a die accommodation, an exchangeable die that can be accommodated in the die accommodation, an identifier of the die, a capturing device which is configured for capturing the identifier of the die, an electronic control unit being embodied externally from the manual pressing pliers and being arranged separately from the manual pressing pliers, a first communication link between the capturing device of the manual pressing pliers and the electronic control unit, an external data storage device on which data is stored, a second communication link between the electronic control unit and the external data storage device on which data is stored and an output device of the electronic control unit or of the manual pressing pliers, the electronic control unit comprising control logic which on a basis of the identifier of the die captured by the capturing device and transmitted via the first communication link and of data from the data storage device being specific for the captured identifier and being transmitted via the second communication link generates an output of the output device which contains an information for a type of workpiece which can be pressed with the die inserted into the pressing pliers.

2. The pressing pliers network of claim 1, wherein the capturing device is arranged in a region of a pliers head of the pressing pliers.

3. The pressing pliers network of claim 2, wherein the capturing device is arranged adjacent to the die accommodation.

4. The pressing pliers network of claim 1, wherein the capturing device comprises at least one of a reading device for reading an identifier embodied as an optical coating and a mechanical scanning device for scanning an identifier embodied as a mechanical contact contour and a receiving unit for receiving a signal sent by a radio frequency identification (RFID) unit of the die, the signal containing the identifier or forming the same and a receiver receiving a radiation signal or light signal which forms or contains the identifier and an inductive coupling device for providing an inductive coupling between the die and the capturing device.

5. The pressing pliers network of claim 1, wherein the captured identifier of the die is at least one of a type of the die and a unique specific identifier of the die and an authentication of the die.

6. The pressing pliers network of claim 1, wherein the exchangeable die comprises a transmitting unit for transmitting the identifier, the transmitting unit being arranged in a recess or in an inner chamber of the die.

7. The pressing pliers network of claim 1, wherein the electronic control unit comprises control logic which on the basis of the identifier of the die captured by the capturing device and transmitted via the first communication link to the electronic control unit and on the basis of data transmitted from the data storage device via the second communication link to the electronic control unit controls an output of an output device or an entry into a storage unit which contains an information that the die is not authenticated for a use in the pressing pliers.

8. The pressing pliers network of claim 1, wherein the electronic control unit comprises control logic which loads characteristic data concerning a desired pressing force curve or concerning a desired pressing displacement curve which is specific for the captured identifier from the data storage device via the second communication link to the electronic control unit, the pressing pliers comprises at least one sensor or switch for sensing an actual pressing force signal or an actual pressing displacement signal when running through a pressing stroke during which in a pressing process a workpiece is pressed by the die arranged in the die accommodation and the electronic control unit comprises control logic by which an evaluation of the pressing process is provided under consideration of characteristic data of the desired pressing force curve or the desired pressing displacement curve and of the actual pressing force signal or the actual pressing displacement signal.

9. A pressing pliers network comprising: manual pressing pliers for pressing a workpiece, the manual pressing pliers comprising hand levers for manually actuating the manual pressing pliers, a die accommodation, an exchangeable die that can be accommodated in the die accommodation, an identifier of the die, a capturing device which is configured for capturing the identifier of the die and an electronic control unit being embodied externally from the manual pressing pliers and being arranged separately from the manual pressing pliers, a workpiece specification device of the manual pressing pliers or of the electronic control unit which is configured such that it is possible to input or capture a workpiece specifier of a workpiece which is designated for being pressed by the manual pressing pliers, a first communication link between the capturing device of the manual pressing pliers and the electronic control unit, an external data storage device on which data is stored, a second communication link between the electronic control unit and the external data storage device on which data is stored and an output device of the manual pressing pliers or of the electronic control unit, where the electronic control unit comprises control logic which on a basis of the identifier of the die captured by the capturing device of the manual pressing pliers and transmitted from the manual pressing pliers via the first communication link to the electronic control unit, the workpiece specifier input into the workpiece specification device or captured by the workpiece specification device and data transmitted from the data storage device via the second communication link to the electronic control unit analyses if the die is suitable for pressing the workpiece having the workpiece specifier; and the control logic generates an output at the output device which depends on a result of the analysis.

10. The pressing pliers network of claim 9, the electronic control unit comprising control logic which on the basis of the identifier of the die captured by the capturing device and transmitted via the first communication link and of data from the data storage device being specific for the captured identifier and being transmitted via the second communication link generates an output of the output device which contains an information for a type of workpiece which can be pressed with the die inserted into the pressing pliers.

11. The pressing pliers network of claim 9, wherein the capturing device is arranged in a region of a pliers head of the pressing pliers.

12. The pressing pliers network of claim 11, wherein the capturing device is arranged adjacent to the die accommodation.

13. The pressing pliers network of claim 9, wherein the capturing device comprises at least one of: a reading device for reading an identifier embodied as an optical coating and a mechanical scanning device for scanning an identifier embodied as a mechanical contact contour and a receiving unit for receiving a signal sent by a radio frequency identification (RFID) unit of the die, the signal containing the identifier or forming the same and a receiver receiving a radiation signal or light signal which forms or contains the identifier and an inductive coupling device for providing an inductive coupling between the die and the capturing device.

14. The pressing pliers network of claim 9, wherein the captured identifier of the die is at least one of: a type of the die and a unique specific identifier of the die and an authentication of the die.

15. The pressing pliers network of claim 9, wherein the exchangeable die comprises a transmitting unit for transmitting the identifier, the transmitting unit being arranged in a recess or in an inner chamber of the die.

16. The pressing pliers network of claim 9, wherein the electronic control unit comprises control logic which on the basis of the identifier of the die captured by the capturing device and transmitted via the first communication link to the electronic control unit and on the basis of data transmitted from the data storage device via the second communication link to the electronic control unit controls an output of an output device or an entry into a storage unit which contains an information that the die is not authenticated for a use in the pressing pliers.

17. The pressing pliers network of claim 9, wherein the electronic control unit comprises control logic which loads characteristic data concerning a desired pressing force curve or concerning a desired pressing displacement curve which is specific for the captured identifier from the data storage device via the second communication link to the electronic control unit, the pressing pliers comprises at least one sensor or switch for sensing an actual pressing force signal or an actual pressing displacement signal when running through a pressing stroke during which in a pressing process a workpiece is pressed by the die arranged in the die accommodation and the electronic control unit comprises control logic by which an evaluation of the pressing process is provided under consideration of characteristic data of the desired pressing force curve or the desired pressing displacement curve; and of the actual pressing force signal or the actual pressing displacement signal.

18. A method for pressing a workpiece under use of a pressing pliers network, wherein the pressing pliers network comprises: manual pressing pliers for pressing a workpiece, the manual pressing pliers comprising: hand levers for manually actuating the manual pressing pliers, a die accommodation, an exchangeable die that can be accommodated in the die accommodation, an identifier of the die, a capturing device which is configured for capturing the identifier of the die, an electronic control unit being embodied externally from the manual pressing pliers and being arranged separately from the manual pressing pliers, a first communication link between the capturing device of the manual pressing pliers and the electronic control unit, an external data storage device on which data is stored, a second communication link between the electronic control unit and the external data storage device on which data is stored, and an output device of the electronic control unit or of the manual pressing pliers, the electronic control unit comprising control logic which on a basis of the identifier of the die captured by the capturing device and transmitted via the first communication link and of data from the data storage device being specific for the captured identifier and being transmitted via the second communication link, generates an output of the output device which contains an information for a type of workpiece which can be pressed with the die inserted into the pressing pliers, wherein the method comprises the following method steps: the die is inserted into the pressing pliers, by the capturing device of the pressing pliers the identifier of the die is captured, data is downloaded via the second communication link from the data storage device, the data containing information being specific for the captured identifier and the information indicating which at least one type of a workpiece can be pressed with the die inserted into the pressing pliers and information indicating which at least one type of workpiece can be pressed with the die is output by an output device.

19. The method for pressing a workpiece according to claim 18, the method comprising the following additional method steps: characteristic data concerning a desired pressing force curve or a desired pressing displacement curve which is specific for the captured identifier is downloaded via the second communication link from the data storage device, a sensor senses an actual pressing force signal or an actual pressing displacement signal during a pressing stroke by which a workpiece is pressed in a pressing process with the die, an evaluation of the pressing process is provided under consideration of the data of the desired pressing force curve or the desired pressing displacement curve and the actual pressing force signal or the actual pressing displacement signal.

20. A method for pressing a workpiece under use of a pressing pliers network, wherein the pressing pliers network comprises: manual pressing pliers for pressing a workpiece, the manual pressing pliers comprising hand levers for manually actuating the manual pressing pliers, a die accommodation, an exchangeable die that can be accommodated in the die accommodation, an identifier of the die, a capturing device which is configured for capturing the identifier of the die and an electronic control unit being embodied externally from the manual pressing pliers and being arranged separately from the manual pressing pliers, a workpiece specification device of the manual pressing pliers or of the electronic control unit which is configured such that it is possible to input or capture a workpiece specifier of a workpiece which is designated for being pressed by the manual pressing pliers, a first communication link between the capturing device of the manual pressing pliers and the electronic control unit, an external data storage device on which data is stored, a second communication link between the electronic control unit and the external data storage device on which data is stored and an output device of the manual pressing pliers or of the electronic control unit, where the electronic control unit comprises control logic which on a basis of the identifier of the die captured by the capturing device of the manual pressing pliers and transmitted from the manual pressing pliers via the first communication link to the electronic control unit, the workpiece specifier input into the workpiece specification device or captured by the workpiece specification device and data transmitted from the data storage device via the second communication link to the electronic control unit analyses if the die is suitable for pressing the workpiece having the workpiece specifier; and the control logic generates an output at the output device which depends on a result of the analysis, wherein the method comprises the following method steps: the die is inserted into the pressing pliers, by the capturing device of the pressing pliers the identifier of the die is captured, by the workpiece specification device a workpiece specification of a workpiece which is designated for being pressed with the pressing pliers is captured or input, on the basis of the captured identifier of the die captured by the capturing device and on the basis of the workpiece specification an analysis is performed if the die is suitable for pressing the workpiece comprising the workpiece specifier and dependent on the result of the analysis an entry and/or an output is generated.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following, the invention is further explained and described with respect to preferred exemplary embodiments illustrated in the drawings.

(2) FIG. 1 schematically shows a pressing pliers network comprising a pressing pliers set, an external electronic control unit and an external data storage device, the pressing pliers set comprising pressing pliers and an exchangeable die.

(3) FIG. 2 schematically shows a method for pressing a workpiece with pressing pliers.

(4) FIG. 3 in a three-dimensional view shows two dies comprising transmitting units for an identifier arranged therein.

(5) FIG. 4 in a three-dimensional view shows an alternative embodiment of two dies comprising transmitting units for an identifier arranged therein.

DETAILED DESCRIPTION

(6) FIG. 1 shows a pressing pliers set 1. The pressing pliers set 1 comprises pressing pliers 2 and an exchangeable pair of dies 3, 4. For the shown embodiment, the pressing pliers 2 are embodied as crimping pliers 6. The actuation of the pressing pliers 2 is provided by the user via a manual actuation of hand levers 7, 8. By a drive connection 9 not shown here the hand levers 7, 8 are connected to die accommodations 10, 11 in a way such that the relative pivoting movement of the hand levers 7, 8 towards each other leads to an opening movement or closing movement of the die accommodations 10, 11. The die accommodations 10, 11 are realized by pliers jaws 12, 13. The drive connection 9 here extends within a housing 14 of a mechanical pliers head 15.

(7) The pressing pliers 2 comprise an electronic constructional group or electronic constructional unit 16 which is arranged adjacent to the die accommodations 10, 11. For the shown embodiment, the electronic constructional unit 16 is held by the housing 14 of the mechanical pliers head 15. Preferably, the electronic constructional unit 16 is arranged on both sides of the mechanical pliers head 15 where the electronic constructional unit partially or completely covers the mechanical pliers head 15. Concerning the constructive design of the electronic constructional unit 16, the electrical or electronic design of the electronic constructional unit 16 and/or the connection of the electronic constructional unit 16 to the mechanical pliers head 15 reference is made to the not pre-published European patent application with the official application number EP 18 173 803.0 which is incorporated by this reference into the present patent application.

(8) The force flow of the pressing force biasing a die 3 at least partially flows via a sensor 17 which senses a pressing force biasing the die 3. Concerning options for the design of the sensor 17 and its integration into pressing pliers (here with a splitting of the pressing force to a pressing force part biasing the sensor 17 and another pressing force part bypassing the sensor 17 in a mechanical parallel connection) reference is made to the not pre-published European patent application EP 17 168 040.8-1809 which is incorporated by this reference into the present patent application.

(9) The dies 3, 4 each comprise an identifier 18, 19 which is specific for the associated die 3, 4 or for the type of the die 3, 4.

(10) The electronic constructional unit 16 comprises an identifier processing device 20 which comprises a capturing device 21, an electronic control unit 22, an output device 23 and an interface 24.

(11) The identifier processing unit 20 on the one hand communicates with the sensor 17 for transmitting an actual pressing force signal 25 measured by the sensor 17 during the pressing stroke. It is possible that the sensor 17 or another sensor also senses an actual pressing displacement signal 26 during the crimping stroke. The identifier processing unit 20 (here the capturing device 21) captures the identifiers 18, 19 of the dies 3, 4. As mentioned in the beginning, this can be provided by capturing the identifier 18, 19 embodied as an optical coding by a camera or a scanner or a reading device of the capturing device 21, by capturing an identifier embodied as a mechanical contact contour by a mechanical scanning device, by an RFID unit 27, 28 of the dies 3, 4 which transmits the identifier 18, 19 which is then captured by the capturing device 21, by a near field communication or a radiation transmitter or light transmitter 29, 30 of the dies 3, 4, the transmitted light or transmitted radiation containing the identifier 18, 19 in coded form and the transmitted light or transmitted radiation being captured by the capturing device 21 or by an inductive coupling between the die 3, 4 and the capturing device 21 (for mentioning only some examples which are not intended to limit the present invention).

(12) The identifier processing unit 20 (or the electronic constructional unit 16) communicates via the interface 24 with an external electronic control unit 31 which might be embodied as a personal computer, tablet, laptop or smartphone. The electronic control unit 31 comprises an output device 32, a data storage device 33 as well as a workpiece specification device 34. Preferably, the first communication link 35 between the interface 24 and the electronic control unit 31 is bi-directional. Furthermore, the electronic control unit 31 communicates by a second communication link 36 via suitable interfaces with a data storage device 37 (which is arranged externally from the control unit 31 and from the crimping tool set 1) which is preferably embodied as a cloud storage 38.

(13) By means of the first communication link 35 the pressing pliers set 1 communicates with the control unit 31 which again by the second communication link 36 communicates with the data storage device 37. In this way, a pressing pliers network 39 is formed.

(14) FIG. 2 shows a method for pressing a workpiece:

(15) In a method step 40 a user selects dies 3, 4 from a plurality of pairs of dies and inserts the selected dies 3, 4 into die accommodations 10, 11 of pressing pliers 2.

(16) In a method step 41 the identifiers 18, 19 of the dies 3, 4 are captured by the capturing device 21. As explained above, the capturing can be provided by capturing an optical identifier as a barcode or QR-code by means of a reading device, by a mechanical scanning of a scanning contour of the dies 3, 4, by means of a receipt of a signal of an RFID unit 27, 28 each being associated with a die 3, 4, by means of a capturing device 21, by an inductive coupling and the like.

(17) In a method step 42, the captured identifier 18, 19 is processed by the control unit 22. It is possible that on the basis of this processing an output is generated at the output device 23. It is e.g. possible that at the output device 23 it is displayed (e.g. with an actual die number) which specific die 3, 4 is present or which type of die is present. It is also possible that the output device 23 displays the number of working strokes that have been passed by the dies 3, 4 where, when exceeding a threshold of the number of working strokes, it is also possible that the output device 23 displays a demand for exchanging the dies 3, 4. Here, it is possible that information required for the analysis (as the number of working strokes that have been run through by the dies 3, 4 and which have been counted by a suitable counting device of the pressing pliers 2, a correlation of the different identifiers 18, 19 of different pairs of dies to a type of workpiece and the like) is stored in a storage unit of the identifier processing device 20 or of the electronic constructional unit 16. However, for the embodiment described here this is not the case.

(18) Instead, in a method step 43 the identifier 18, 19 (or an information determined therefrom by the control unit 22 due to the processing) is transmitted via the interface 24 by means of the first communication link 35 to the control unit 31, which is e.g. a smartphone or a tablet. Here, the transmission is preferably provided wirelessly by WLAN or via bluetooth or cable-based.

(19) In a method step 44, the control unit 31 again transmits the identifiers 18, 19 (or an information determined therefrom, in some cases also with a further processing by the control unit 31) via the second communication link 36 to the data storage device 37 which is in particular embodied as a cloud storage 38. In the data storage device 37 a correlation of the identifiers 18, 19 or information determined therefrom with types or components of workpieces which can be processed with the dies 3, 4 associated with the identifiers 18, 19 are stored.

(20) Due to this correlation and a communication to the control unit 31 and/or to the control unit 22 it is possible that in a method step 45 information is provided in the control unit 31 and/or in the control unit 22 for which workpiece, for which type of workpieces or which types of workpieces or configurations of the same the dies 3, 4 arranged in the die accommodations 10, 11 are designated.

(21) In a method step 46, this information can be brought to the knowledge of the user by the output device 23 and/or the output device 32. It is e.g. possible that in the method step 46 on a display of the smartphone it is displayed to the user which plugs, which cable and/or which sealing can be crimped with the dies 3, 4 being inserted into the pressing pliers 2.

(22) It is e.g. also possible that the user inputs a product number or type number of the workpiece or of components via the workpiece specification device 34 of the control unit 31. The control unit 31 displays to the user that the crimping of this workpiece or the component of the same is admissible with the dies 3, 4 or not.

(23) It is optionally, alternatively or cumulatively possible that in a method step 47 data 48 is provided to the control unit 31 from the data storage device 37, the data 48 being specific for the captured identifiers 18, 19 and the data 48 e.g. being a desired pressing force curve 49 and/or a desired pressing displacement curve 50, inclinations of the same, maxima, minima and the like. If then a workpiece is pressed with the pressing pliers 2, the actual pressing force signal 25 and/or the actual pressing displacement signal 26 sensed by the sensor 17 is transmitted by the control unit 22 via the first communication link 35 to the control unit 31. By means of the control unit 31 then in a method step 51 the crimping process is evaluated under consideration or comparison of the desired pressing force curve 49 and/or the desired pressing displacement curve 50 on the one hand and the actual pressing force signal 25 and/or the actual pressing displacement signal 26. An evaluation of this type might be used for the examination if the inserted dies 3, 4 are admissible for being used for the workpiece pressed therein because a pressing of a workpiece not being suitable (in particular with a non-fitting diameter, a stiffness which is not adequate and/or a non-fitting geometry) leads to a deviation of the actual pressing force signal 25 from the desired pressing force curve 49 outside of a tolerance region (the tolerance region might also be transmitted by the data storage device 37 via the second communication link 36 to the control unit 31). However, even if an admissible workpiece is crimped by the dies 3, 4, by means of the comparison, a process monitoring can be provided for monitoring if the workpiece has been inserted into the dies 3, 4 according to the specifications and if the pressing stroke has been run through according to the specifications. If this is not the case, also the actual pressing force signal 25 is outside from the tolerance region of the desired pressing force curve 49. By the output device 32 then a corresponding output is generated (so e.g. an output of the type that the workpiece is admissible or not admissible for being pressed by the dies 3, 4, that the pressing stroke has been run through according to the specifications or not or it is even possible that the actual pressing force signal over time is played or the actual pressing displacement signal is displayed and/or the desired pressing force curve over time or over the desired pressing displacement curve is displayed, in some cases also with the display of the tolerance region). Accordingly, it can be brought to the knowledge of the user where the actual pressing force signal 25 has been within the tolerance region and that in some cases the tolerance region has been left.

(24) In a method step 52, then a documentation is provided by making an entry into a data storage device of the pressing pliers 2 (so of the electronic constructional unit 16 or the identifier processing device 20), into the data storage device 33 and/or into the data storage device 37.

(25) In order to mention only one example that is not intended to limit the present invention, the entry might be the date of the execution of the pressing stroke, the captured identifier 18, 19, any data related to the inserted workpiece captured by the workpiece specification device 34 or input, data related to the result of the evaluation of the pressing process as e.g. the actual pressing force signal 25 and/or the actual pressing displacement signal 26.

(26) It is optionally possible that by means of the workpiece specification device 34 (which might base on a captured image of a workpiece which is to be pressed with an image processing for identifying the workpiece or components of the same or which might base on a manual input of ciphers) the workpiece which is designated for being pressed by the pressing pliers 2 is specified. This specification of the workpiece can then also be documented by entry in the method step 52. It is also possible that then in the control unit 31 it is analyzed if an admissible combination of the specified workpiece and the dies 3, 4 is present where the result can then be displayed by the output device 34. It is alternatively or cumulatively possible that for the specific workpiece characteristic data 48 being specific for the specified workpiece are provided from the data storage device 37 to the control unit 31 (as e.g. desired pressing force curves 49 and desired pressing displacement curves 50 being specific for the combination of dies 3, 4/specified workpiece) which can then be used as the basis for the above-described evaluation. It is also possible that on the basis of the specification of the workpiece which is to be crimped, the specification being sensed by the workpiece specification device 34 or input into the workpiece specification device 34 an image is produced at a displaying device for the user indicating which suitable die has to be inserted into the die accommodation.

(27) It is also possible that the identifier processing device 20 or the electronic constructional unit 16 comprises a GPS unit by which it is possible to automatically determine a position of the pressing pliers 2. The position determined in this way can then be transmitted by the first communication link 35 to the external electronic control unit 31. It is then possible to display the position of the pressing pliers 2 at the external electronic control unit 31 for the user, in some cases also with indications to the route leading to the pressing pliers 2. In this way, it is easier for the user to retrieve the pressing pliers 2 in cases where the user has deposited the pressing pliers 2 at some place. However, it is also possible that the die 3, 4 comprises a GPS unit the signal of which can then be transmitted (by the electronic constructional unit 16 or independent on the electronic constructional unit 16) to the external electronic control unit 31 so that also the external electronic control unit 31 is aware of the position of the die and is able to display the position of the die.

(28) As another option, the pressing pliers 2 might be able to allow a communication with a storage device for the pressing pliers 2 and preferably for a plurality of further tools. The storage device might e.g. be a tool box, a tool trolley or a tool crib. By means of the communication the storage device is informed that the pressing pliers 2 are arranged in the storage unit. This might e.g. be provided automatically in the way that when the pressing pliers 2 are arranged in the storage device a signal sent by the pressing pliers and specifying the pressing pliers 2 propagates in the receiving region of a receiver of the storage device. The storage device might then give an overview to a user on the tools arranged within the storage device and might here in particular give the information if the pressing pliers 2 are arranged in the storage device or not. The corresponding also applies for the dies 3, 4.

(29) FIG. 3 shows dies 3, 4 into which each a transmitting unit 53, 54 for the identifier 18, 19 is integrated. It is generally possible that the transmitting units 53, 54 comprise a battery or a rechargeable accumulator so that the transmitting units 53, 54 are able to actively transmit the identifiers 18, 19 which is in particular triggered by a suitable activation signal of the identifier processing unit 20. However, preferably the transmitting units 53, 54 are embodied as RFID units 27, 28. According to FIG. 3, the dies 3, 4 comprise recesses 55, 56 which are here embodied as blind bores 57, 58. With an accurate fit the transmitting units 53, 54 are accommodated in the recesses 55, 56. For this purpose, the transmitting units 53, 54 might e.g. have a cylindrical design or a design similar to a coin cell. It is possible that a housing of the transmitting units 53, 54 is freely accessible within the dies 3, 4 in an assembly direction 59 along which the transmitting units 53, 54 are inserted into the recesses 55, 56 and which might correspond to the longitudinal axis of the blind bores 57, 58 or opposite to this direction. Accordingly, the identifier 18, 19 transmitted from the transmitting unit 53, 54 is not weakened or obstructed by the dies 3, 4. It is also possible that the capturing device 21 of the identifier processing device 20 is arranged in the region of the axis defined by the assembly direction 59 so that the identifier 18, 19 sent out by the transmitting units 53, 54 can be received without any redirections. It is also possible that after the insertion of the transmitting units 53, 54 into the associated recesses 55, 56 the transmitting unit 53 is covered in outer direction (so opposite to the assembly direction 59) by a layer of a varnish. This layer of a varnish should allow the passing of the signal which contains the identifier 18, 19 and which is sent by the transmitting units 53, 54 without an excess weakening or damping of this signal. Furthermore, the layer of the varnish might seal an interior chamber of the recess 55, 56, wherein the transmitting unit 53, 54 is accommodated in outer direction so that the entry of humidity and/or contaminations can be avoided. Finally, it is possible that by means of the layer of the varnish a protective effect can be achieved for the transmitting unit 53, 54 against mechanical damages. Preferably, a housing of the transmitting units 53, 54 or the layer made of the varnish or any other cover is flush with an outer surface 60 of the die 3, 4.

(30) For the embodiments of FIGS. 3 and 4, the dies 3, 4 are generally designed as described in the patent publication DE 198 02 287 01. This will as an example be explained on the basis of the die 3, where the corresponding also applies for the die 4. The die 3 comprises a flange section 61 and a die section 62. The flange section 61 has a plate-like design. The flange section 61 is accommodated with a transitional fit or a play between pliers jaw plates of the associated pliers jaw 12. The flange section 61 comprises a through bore 63 which has an orientation transverse to the crimping force biasing the die 3 and transverse to the pivoting plane of the dies 3, 4 and so of the pliers jaws 12, 13. In the state assembled to the pliers jaw a fixing screw or fixing pin extends through the through bore 63. The fixing screw or fixing pin is held in both end region in the aforementioned pliers jaw plates of the associated pliers jaw 12. In a transition region 64 between the flange section 61 and the die section 62 a step 65 might be provided (without this necessarily being the case). In the transition region 64 a base body of the die 3 comprises two bores 66, 67 having an orientation parallel to each other and having an orientation vertical to the crimping force biasing the die 3 and having an orientation vertical to the pivoting plane of the dies 3, 4. Bearing elements 68, 69 are held in the bores 66, 67. Preferably, the bearing elements 68, 69 are embodied as bolts or pins which are accommodated in the bores 66, 67 with an accurate fit. When the die 3 is assembled to the pliers jaw 12, the end regions of the bearing elements 68, 69 protruding from the flange section 61 (here half-cylindrical outer surfaces of the pins or bolts) contact concave accommodations of the pliers jaw plates having a corresponding shape. In this way, the holding and guiding of the die 3 at the associated pliers jaw 12 is provided.

(31) The die section 62 protrudes towards the other die out of the pliers jaw plates and serves for providing the die contour 70. With respect to further details for the general design of the dies 3, 4, reference is made to the patent publication DE 198 02 287 01.

(32) For the embodiment of FIG. 3, the transmitting unit 53, 54 is arranged in the flange section 61. Accordingly, in the state of the dies 3, 4 assembled to the pressing pliers 5 the transmitting units 53, 54 are protected by the pliers jaw plates. Here, preferably the recesses 55, 56 are arranged on the side of the flange section 61 facing away from the die section 62.

(33) FIG. 4 shows another example for the integration of the transmitting units 53, 54 into the dies 3, 4. Here, indeed also the transmitting units 53, 54 are arranged in the flange section 61 of the dies 3, 4. However, the recesses 55, 56 (here blind bores 57, 58) are arranged with an extension in the pliers head plane where preferably one direction of the extension of the recesses 55, 56 or of the blind bores 57, 58 is parallel to the pressing force. Preferably, the pressing pliers 2 comprise a hollow space in the region of an axis defining the assembly direction 59, the hollow space preferably being formed between the pliers jaw plates. The hollow space provides a good signal transmission. The identifier processing device 20 or the capturing device 21 might then directly adjoin to this hollow space or other components or material section might be arranged between the hollow space and the capturing device 21.

(34) Various other kinds of integration of the transmitting units 53, 54 into the dies 3, 4 are possible. To mention only some non-limiting examples, a recess or an inner chamber of a die 3, 4 wherein the transmitting unit 53, 54 is arranged can be closed by a lid. It is also possible that the flange section 61 or the whole die 3 is formed by two half shells which then form the inner chamber for accommodating the transmitting unit 53, 54 where the two half shells can be connected to each other with a provision of a sealing effect of the inner space by a material bond (e.g. by adhering or welding).

(35) The distance of a transmitting unit 53, 54 from an associated capturing device 21 is preferably smaller than 3 cm, smaller than 2 cm, smaller than 1.5 cm or even smaller than 1 cm. This distance extends at least partially through the aforementioned hollow chamber of the pressing pliers 2 so that a good signal transmission is provided.

(36) In the case that the identifier 18, 19 or the transmitting unit 53, 54 comprises an RFID, the corresponding applies for an excitation signal for a power supply of the RFID sent by the identifier processing unit 20.