EP4067003A1 - Tool system, drive unit and tool head - Google Patents

Abstract

A tool system is proposed having a drive unit and at least one tool head that can be placed on the drive unit, the drive unit having a drive, a controller, a connecting element and an interface, the connecting element being configured to releasably close the tool head placed on the drive unit in a form-fitting manner lock, wherein the drive is configured to transmit a mechanical force to the locked tool head, wherein the controller is configured to identify an identifier of the tool head via the interface and, depending on the identified identifier, an operating mode of the drive from a plurality of select operating modes. A drive unit and a tool head are also proposed.

Description

State of the art

The invention relates to a tool system having a drive unit and at least one tool head that can be placed on the drive unit. The invention also relates to a drive unit and a tool head.

Tool systems with interchangeable tool heads are known from the prior art in a variety of embodiments. Such tool systems typically have a drive unit, designed in particular as a hand-held device, onto which various tool heads can be placed. If a tool head has to be operated with an individual mode, the corresponding settings are usually made manually by the user. If the tool heads used and the work carried out with them are logged, this is usually done by recording an identifier or type designation of the tools and the materials used.

An example of such tool systems are pressing tools, in which the drive unit generates the force to be applied for processing and transmits it to the pressing insert (press jaw) used in each case by means of a mechanical coupling. The press insert is usually designed for a specific nominal force, a maximum stroke and a specific size range of the workpieces to be machined. These operating parameters must be set before the tool is put into operation, which not only delays the work process, but can also cause malfunctions or damage due to incorrect settings.

Disclosure of Invention

The object of the invention is to provide a tool system with exchangeable heads, in particular a pressing tool system with exchangeable pressing inserts (or pressing jaws) as exchangeable heads or tool heads, in which the disadvantages of the prior art are avoided.

The object is achieved according to the invention by a tool system (or a pressing tool system), which has a drive unit and at least one tool head (or pressing insert (or pressing jaw as tool head) that can be placed on the drive unit, the drive unit having a drive, a controller, a Having a connecting element and an interface, wherein the connecting element is configured to releasably lock the tool head placed on the drive unit in a form-fitting manner, the drive being configured to transmit a mechanical force to the locked tool head, the controller being configured to, via the Interface to identify an identifier of the tool head and, depending on the identified identifier, to select an operating mode of the drive from a plurality of operating modes. In particular, it is provided according to the invention that the connecting element of the drive unit and the tool head (or there s connecting element of the drive unit and at least part of the tool head or the part of the tool head that interacts with the connecting element) are connected to one another in a locked manner, in particular during operation (of the motor or drive) of the tool system, with this locking being implemented in particular in a form-fitting or latched manner, and in particular are arranged stationary or immobile.

The tool system according to the invention advantageously makes it possible for a replaceable tool head to be automatically recognized by the drive unit and operated in a manner specifically matched to the tool head. This not only increases the ease of use and shortens the work process, but also prevents an incorrect setting or improper use of the tool system. The drive unit is preferably a hand-held device, in particular a cordless hand-held device, which is equipped with an integrated energy storage unit. In particular, the tool system according to the invention can be a pressing tool system with interchangeable tool heads, each tool head being operated with specific operating parameters such as pressing force, pressing time and/or maximum stroke. It is also conceivable that only certain basic settings or ranges of the operating parameters are defined by the operating mode and a more precise selection is made by the user. In this case, the operating mode is selected depending on the identification of the tool head and an additional setting by the user. The automatic selection of the operating mode can also take place depending on the identifier of the tool head and an identifier of the workpiece to be machined. In particular, in addition to the tool head, the tool system has at least one additional tool head, preferably a plurality of additional ones Tool heads that have different identifiers and are associated with different modes of operation.

The tool head is attached to the drive unit by placing it and locking it in place. The locking preferably takes place by means of a latching mechanism, in which the attached tool head is brought into a closed position, for example by a rotary movement, and latches in a form-fitting manner in this position. In the locked position, the drive unit and the tool head are mechanically coupled in such a way that a force generated by the drive unit is transmitted to the tool head—in particular to a mechanical element of the tool head. The power can be transmitted by a mechanical coupling element such as a piston or ram, with the mechanical element (of the tool head) being set in motion by the drive unit (or by the mechanical coupling element of the drive unit) and the force applied by the drive unit being transmitted by mechanical Contact transferred to the tool head. The force transmitted through the contact is in particular directed parallel to a longitudinal axis of the drive unit and/or the tool head and points away from the drive unit. Alternatively, the force can also point towards the drive unit or oscillate between both directions. It is also conceivable that the drive unit drives a rotation of the mechanical coupling element and in this way transmits a torque to the tool head, with the axis of rotation being directed in particular parallel to the longitudinal axis of the drive unit and/or the tool head.

According to the invention, the drive unit has an interface which is used in particular to transmit information between the tool head and the drive unit and which allows the identification of the tool head to be transmitted to the controller of the drive unit. Based on the identifier, an operating mode of the drive unit is then defined by the controller and the tool head is operated in accordance with the mode. The operating mode is preferably completely determined by the identifier, ie the selection of the operating mode is based on a fixed association between identifier and operating mode, it being conceivable that this association can be configured by the user. In particular, there is data about the possible identifiers and the associated operating modes in a memory of the drive unit, eg in a register of the controller, and the operating mode is determined by retrieving these memory contents or by comparing the identified identifier with the stored identifiers. Alternatively, it is also conceivable that the controller of the drive unit transmits the identified identifier of the tool head to an external device and receives from it the operating mode determined as a function of the identifier. Preferably, the controller is configured to control the operation of the To block the tool head if no identifier has been identified or the identified identifier can not be assigned an operating mode.

The interface is preferably a mechanical interface, an electronic interface or a radio interface. A mechanical interface can be implemented, for example, on the basis of a lock and key principle, in which a structural element positively engages in a complementarily shaped recess and the identifier of the tool head is identified by this positive engagement. In particular, the tool head can have a mechanical coding in the form of a profile or a contour, eg a plurality of projections and/or recesses, which is identified by a complementary structure of the drive device through contact or scanning. For example, a switch or a plurality of switches of the drive unit can be actuated when there is mechanical contact between the two complementary structures. In the case of an electronic interface, when the tool head is put on, at least one electrically conductive contact is made with the drive unit and the identification of the tool head is read out by an electrical signal. In particular, for this purpose the tool head can contain an integrated circuit, for example a microchip, which is configured to communicate with the controller of the drive unit via a digital voltage signal. In the simplest case, the tool head has one or more electrical contact elements, the arrangement of which encodes the identifier of the tool head and which, when placed, closes one of several electrical circuits of the drive unit and thus enables the identifier to be identified. In the case of a radio interface, the identifier of the tool head is transmitted wirelessly to the controller of the drive unit by means of electromagnetic waves, with the information being transmitted, for example, via an active or passive transponder, in particular via an RFID or NFC system ("radio-frequency identification" or "near field communication") can take place. Further possibilities result from data transmission via Bluetooth or WLAN. The tool head preferably has a corresponding transmitter for transmitting the electromagnetic signal. It is also possible to identify the identifier using an external camera (for example a smartphone), an external scanner or an external sensor and to transmit it wirelessly to the drive unit. In principle, it is also conceivable to use interfaces in which the identification of the tool head is transmitted partly mechanically and partly by an electronic signal. It is also conceivable that a mechanical coding ensures that only tool heads suitable for tool operation can be placed on the drive unit, while the identifier is separated from this via an electronic interface or a radio interface is transferred. With all of these design options, the identifier can be transmitted when it is put on and/or when it is locked.

According to a preferred embodiment of the invention, the interface has an optical or acoustic sensor, a magnetic field sensor or a current sensor. In particular, the interface has a sensor or a plurality of sensors from the group of sensors specified below: one or more optical sensors, one or more acoustic sensors, one or more magnetic field sensors and one or more current sensors. The sensor is preferably arranged on the drive unit, for example on the connecting element, while the tool head has a signal transmitter or an identification feature that can be detected by the corresponding sensor. This can be, for example, a light source, a reflecting surface or an optical identifier, an acoustic signal transmitter, a power source, an electrical resistor or a magnet or a magnetic element. The sensor can be a light or color sensor, for example, and a light source or the color of a surface (or a plurality of surfaces) or a light source (or a plurality of light sources) can serve as the identification feature, with the identification of the tool head is encoded by the color or its RGB value. The identification feature can be a two-dimensional optical code (barcode, QR code) that can be read using a laser scanner or a camera. Another possibility is to encode the identifier in a three-dimensional shape that is recorded by a camera and assigned to the identifier, for example, by image recognition software. The identifier can also be transmitted by a field generated by a magnetic element, which is detected by a magnetic field sensor. The field can be generated either by a permanent magnet or by induction. In the case of an acoustic sensor, it can in particular be an ultrasonic sensor and the identifier can be correspondingly encoded by an ultrasonic signal. Furthermore, the acoustic signal can be generated via a loudspeaker and received by a microphone. In the case of a current sensor, the identifier can be encoded by an internal resistor. The identifier can also be detected in an inductive or capacitive manner or by microscopic or radiological methods for detecting nanoparticles.

In particular, according to a preferred embodiment, it is provided according to the invention that the sensor is provided as an optical sensor for color detection (in particular for the detection or differentiation or distinguishability of a large number of different colors or color values),
in particular, the sensor for detecting an identifier in the form of an optical recognizable imprint or label or an optically recognizable surface is formed. Here, in particular, the optically recognizable surface is formed on or as part of the tool head, in particular formed in such a way that the optically recognizable surface can be detected by the sensor of the interface (ie the drive unit). It is also preferably provided here that the interface (of the drive unit) has an illumination device or an irradiation device for generating electromagnetic radiation, in particular light radiation, such that for the detection or detection of the identifier, the area of the identifier is irradiated or illuminated with the corresponding electromagnetic radiation takes place. The identification or the detection of the identifier preferably takes place by optically detecting the identifier in each case, in particular by optically detecting a color or a plurality of colors or a plurality of arranged colored areas.

As a result, it is possible according to the invention in a particularly simple and robust manner to acquire or detect the piece of identification information or the plurality of pieces of identification information. In particular, it is advantageously possible according to the invention for color detection to be carried out. In particular, it is possible to distinguish between a large number of different and unambiguous color shades, so that - for example - an information content of several bits (in particular 2 bits or 3 bits or 4 bits or 5 bits or 6 bits or 7 bits or from 8 bits or from 9 bits or from 10 bits or from 11 bits or from 12 bits) can be taken from a single area kept in a specific color (i.e. 2 bits if four different color tones are distinguished in the area of the area, 3 bits if eight different color tones are distinguished in the area, 4 bits if sixteen different color tones are distinguished in the area, 5 bits if thirty-two different color tones are distinguished in the area, 6 bits if in the area sixty-four different hues are distinguished, 7 bits if 128 different hues are distinguished in the area of the surface, 8 bits if in the area of the F 256 different color tones can be distinguished on the surface, 9 bits if 512 different color tones are distinguished in the area of the surface, 10 bits if 1024 different color tones are distinguished in the area of the surface, 11 bit if 2048 different color tones are distinguished in the area of the surface, 12 bit, if 4096 different shades of color are distinguished in the area of the surface). Correspondingly, two such surfaces (each) in a specific color allow a corresponding doubling of the information content, so that a large number of different types of tool heads can already be distinguished with just one or two such surfaces in (each) a specific color. By providing three or more such in (each) a specific color held surfaces can according to the usable or available or detectable information content can be increased.

In addition, with the tool system according to the invention, it is also possible for the drive unit to have at least one further interface in addition to the interface. For example, the identifier of the tool head can be recognized via the (first) interface and verified via the additional (second) interface. The first interface can also be used to identify the identifier of the tool head, while the second interface identifies an identifier of the workpiece to be machined and/or reads in additional operating data or operating settings. In principle, combinations of all of the configurations described above are possible for this purpose. The second interface is preferably an optical interface or a radio interface. In particular, the identification of the tool head and/or the identification of the identification of the workpiece can be verified by reading in an optical code. Alternatively, the verification and/or identification can take place via a wireless data exchange with an external computing device or a mobile computing unit (notebook, tablet, smartphone).

According to a further preferred embodiment of the invention, it is provided that the operating mode defines an amplitude of the mechanical force transmitted to the tool head and/or an amplitude of a movement of the tool head and/or defines a time profile of the mechanical force and/or the movement of the tool head . The amplitude of the force means in particular the maximum force or maximum torque applied by the drive unit, while the amplitude of the movement corresponds in particular to the maximum stroke of the tool head and/or the mechanical coupling element of the drive unit. For example, a specific maximum force or a specific force range can be provided for a tool head, which is automatically set after the identifier has been identified. A specific maximum stroke or a corresponding range can also be set depending on the identifier. The operating mode can also define operating parameters that influence the specific time course of the force or movement. Examples here are the length of time over which the force is applied or the frequency of a periodically applied force or movement. In general, the current force or movement amplitude can be defined as a function of time by the operating mode, ie in particular its increase and decrease over time.

According to a preferred embodiment of the invention, the drive is a hydraulic, pneumatic or electric drive. In the case of a hydraulic drive, the drive has a pumping device which conveys a hydraulic fluid, in particular a hydraulic oil Pressure is applied and a mechanical coupling element is set in motion via the pressure, so that a mechanical force is transmitted to the tool head. For example, the hydraulic fluid can be pumped into a pressure cylinder and drive a movable piston that transfers the power to the tool head. Alternatively, the liquid can be pumped into a hydraulic motor and generate a torque that is transmitted to the tool head via the coupling element. The pumping device can in particular be an electrically driven hydraulic pump (eg an axial piston pump). In a pneumatic drive, a gas is compressed with a compressor and the force generated by the gas pressure is transmitted to the tool head via the mechanical coupling element. Alternatively, it is also conceivable for the pump or the compressor not to be part of the drive unit and for the pressurized medium to be supplied to and removed from the drive unit from the outside. In the case of an electric drive, the drive unit has in particular an electric motor and a gear unit, the force generated by the electric motor being transmitted via the gear unit to the mechanical coupling element and thus to the tool head.

According to a preferred embodiment of the invention, the connecting element has a locking mechanism, in particular a bayonet lock. The closure consists in particular of a male connecting element and a complementary-shaped female connecting element, wherein the female connecting element can be designed, for example, as a socket, which receives the male, for example cylindrically designed, connecting element. Preferably, the connector of the drive unit is the female connector, while the tool head has a corresponding male connector. An arrangement is also conceivable in which the drive unit has the male connecting element and the tool head has the female connecting element. The male connecting element has in particular at least one projection, for example a pin, which slides into a recess of the female connecting element when the tool head is placed or locked. The recess is in particular an L-shaped slit with a longitudinal slit, at the end of which there is a short transverse slit running essentially at right angles or at an angle. Preferably, the transverse slot in turn has a short transverse segment at its end, which forms a "serif" of the L-shaped recess. The projection of the male connecting element first slides into the longitudinal slot when it is put on, then moves into the transverse slot by turning and finally snaps into the serif, where it is held in position by a spring, for example, so that it is prevented from sliding out, or only through targeted effort is possible. This way lets A stable, detachable connection between the drive unit and the tool head can be established using a relatively simple, robust mechanism.

According to a further preferred embodiment of the invention, it is provided that the connecting element is configured to engage when a target position of the attached tool head is reached, or the connecting element has a sensor or a contact element, in particular a switch, for detecting the target position of the tool head. In particular, the tool head is brought into the desired position by rotating it. A possible latching mechanism is in particular the bayonet catch described above with the serif-shaped transverse segment, into which the projection of the male connecting element latches. However, other latching mechanisms are also conceivable here, in which one or more projections latch into recesses and are held in position in particular by an elastic element such as a spring. The target position of the tool head can be detected, for example, via the position of the latching element, via a sensor, a switch or via a correspondingly arranged electrically conductive element that closes a circuit when the target position is reached.

According to a preferred embodiment of the invention, the controller is configured to use the connecting element and/or the interface to detect a positioning of the attached tool head and in particular to detect an incorrect position or a desired position of the tool head. For example, the controller can indicate the presence of a faulty position or the desired position by means of an optical or acoustic signal.

According to a preferred embodiment of the invention, the tool head is configured to perform a movement for pressing, cutting and/or bending workpieces. In particular, the tool head can be configured to receive a tool insert with which a workpiece that can be gripped by the tool insert or attached to the tool insert can be separated and/or deformed. It is possible that the tool system has a plurality of tool inserts and a tool head is compatible with multiple tool inserts. The tool system can be a press tool system, for example, and the tool insert can be a press insert (press jaw). The interface or another interface of the tool system can be used to identify an identifier of the tool insert and to select an operating mode of the drive depending on the identifier of the tool head and the identifier of the tool insert.

The drive unit preferably has an energy storage unit, in particular a lithium-ion battery. In this way, the tool system according to the invention can be operated without a power cable or any other connection to an external energy source.

According to a further preferred embodiment of the invention, it is provided that the drive unit has an electronic data memory (in particular a memory card, e.g. an SD card) and/or is configured to transmit data via the interface or another interface to an external data processing device (in particular a PC, notebook, tablet or smartphone). The internal or external data memory can be used in particular to log the tool head used, the operating mode, the machined workpieces and/or the work cycle carried out in a log file. In this way, the work steps carried out can be traced back and/or further processed with suitable software. In particular, it is possible to graphically display the work cycle on the external data processing device. The data transmission to the external device can be wired (e.g. USB cable) or wireless (Bluetooth, WLAN).

Another subject matter of the present invention relates to a drive unit that has a drive, a controller, a connecting element and an interface, the connecting element being configured to releasably lock a tool head that can be placed on the drive unit in a form-fitting manner, the drive being configured to to transmit mechanical force to the locked tool head, wherein the controller is configured to identify an identifier of the tool head via the interface and to select an operating mode of the drive from a plurality of operating modes depending on the identified identifier.

Another object of the present invention relates to a tool head that can be placed on an embodiment of the drive unit according to the invention, the tool head being configured to interact with the connecting element of the drive unit in such a way that the tool head placed on the drive unit can be detachably locked in a form-fitting manner.

The drive unit according to the invention and the tool head according to the invention result in the same design options and advantages that were described in relation to the tool system according to the invention. In particular, according to a preferred embodiment of the tool head according to the invention, it is provided that the tool head has an identifier which is transmitted via an interface of the drive unit is identifiable. Provision is also made in particular for the identifier to be in the form of an optically recognizable imprint or label or an optically recognizable surface and for the identifier to be recorded or detected by optically recording the identifier in each case, in particular by optically detecting one color or a plurality of colors of colors or a plurality of arranged colored areas, wherein in particular for the detection or detection of the identifier, the area of the identifier is irradiated or illuminated with a corresponding electromagnetic radiation.

Further advantageous design features of the invention are contained in the following description of the figures.

Brief description of the drawings

Fig. 1

eine schematische Perspektivansicht eines Ausführungsbeispiels des erfindungsgemäßen Werkzeugsystems mit einer Antriebseinheit und einem ersten Werkzeugkopf,

Fig. 2

eine schematische Perspektivansicht des Ausführungsbeispiels, in der der erste Werkzeugkopf auf die Antriebseinheit aufgesetzt ist,

Fig. 3

eine schematische Perspektivansicht eines Ausführungsbeispiels des erfindungsgemäßen Werkzeugsystems mit der Antriebseinheit und einem zweiten Werkzeugkopf.

Fig. 4

eine schematische Perspektivansicht des Ausführungsbeispiels, in der der zweite Werkzeugkopf auf die Antriebseinheit aufgesetzt ist,

Fig. 5

eine schematische Perspektivansicht der Antriebseinheit ohne Stößel,

Fig. 6

eine schematische Perspektivansicht der Antriebseinheit mit Stößel.

The invention will now be explained in more detail on the basis of the preferred exemplary embodiments illustrated in the drawings. while showing

1

a schematic perspective view of an embodiment of the tool system according to the invention with a drive unit and a first tool head,

2

a schematic perspective view of the embodiment in which the first tool head is placed on the drive unit,

3

a schematic perspective view of an embodiment of the tool system according to the invention with the drive unit and a second tool head.

4

a schematic perspective view of the embodiment in which the second tool head is placed on the drive unit,

figure 5

a schematic perspective view of the drive unit without the plunger,

6

a schematic perspective view of the drive unit with ram.

Embodiments of the invention

the figure 1 shows a schematic representation of an embodiment of the tool system 1 according to the invention, which in this case as a battery-hydraulic Press tool system is formed. The tool system 1 consists of the drive unit 2 (shown here only partially) onto which the tool head 3 can be placed. The tool head 3 in turn has a receptacle 11 which can accommodate a tool insert (not shown), in particular a pressing jaw. The tool insert can be mechanically locked with the lock 12 so that the pressing jaw is firmly connected to the tool head 3 . Depending on the desired pressing force, different tool heads 3 can be placed on the drive unit. the inside figure 1 shown tool head 3 is designed for a nominal force of 19 kN, while the tool head 3 from the Figures 3 and 4 designed for a nominal force of 32 kN. The two tool heads also differ in various other sizes, such as maximum stroke, pressing time and the maximum nominal width of the connection material to be processed.

In order to fix the tool head 3 on the drive unit 2, the drive unit 2 has a connecting element 4, which is designed here as a cylindrical bushing 4 provided with recesses 7, 7', which receives the cylindrical end of the tool head 3 and is secured by a bayonet catch 6 locked. For this purpose, the recesses 7, 7′ are each L-shaped and consist of a longitudinal slot, the end of which is followed by a short transverse slot running essentially at right angles or at an angle. At its end, the transverse slot in turn has a short transverse segment 14, 14' (cf. Figures 5 and 6 ) forming the "serif" of the L-shaped recess 7, 7'. When placing the tool head 3 is inserted into the socket 4, wherein a pin-shaped projection 8 slides into the longitudinal slot. By turning the tool head 3, the projection 8 then moves into the transverse slot and finally engages in the serif 14, 14', where it can be held in position, for example by a spring, so that the tool head 3 is fixed in its desired position. In the illustrated embodiment, the connecting element 4 has two L-shaped slots 7, 7' which cooperate with the two pins 6 (only one of which is visible in the illustration). The connecting element 4 also has a limit switch or sensor 9, via which the drive unit 2 detects the position of the tool head 3 and, in particular, a correct positioning (or incorrect position) can be detected.

For power transmission between drive unit 2 and tool head 3, a hydraulic drive in the form of a ram 10' (cf. figure 5 ) trained mechanical coupling element set in motion, which transmits the force generated by the hydraulics to the tool head 3 by mechanical contact. In the Figures 1 to 4 and 6 is the tool system 1 for better visibility without the ram 10 ' shown and only the opening 10 visible through which the plunger 10 'protrudes from the drive unit 2.

According to the invention, the drive unit 2 has an interface 5 which is designed here as a sensor arranged on the bottom surface of the connecting socket 4 . An identifier of the tool head 3 is identified via the interface 5 and the operating mode of the drive is set by controlling the drive unit as a function of this identifier. In particular, it is possible in the exemplary embodiment shown that the specific operating parameters (nominal force, maximum stroke, pressing time, etc.) of the tool head 3 are selected automatically when the tool head 3 is placed and/or locked, without the user having to make manual settings for this. In this way, not only is the ease of use increased and the use of the tool system 1 made more effective, but setting an incorrect operating mode is also advantageously prevented.

The interface 5 can be, for example, an optical or acoustic sensor, a magnetic field sensor or a current sensor. The tool head 3 has a corresponding identification feature or a signal generator via which the identifier can be identified. This can be, for example, an optical or mechanical code that is read in or scanned by the sensor 5 . The identifier can also be encoded by an electrical resistance or a magnetic, capacitive or inductive element, the identifier being read out via an electrical contact between the drive unit 2 and the tool head 3 .

According to the invention, it is particularly preferred that the identifier of the tool head 3 is designed in the form of an optically recognizable imprint or label or an optically recognizable surface. The identifier is preferably recorded or detected by optically detecting the identifier, in particular by optically detecting a color (or one color of the imprint or label) (in particular from a plurality or a large number of distinguishable colors) or a plurality of colors or a plurality of arranged colored areas (e.g. two colored areas arranged next to each other or also two concentrically arranged circular (or ring-shaped) colored areas), whereby, in particular, for the detection or detection of the identifier, the area of the identifier is irradiated or illuminated with a corresponding electromagnetic radiation (in the visible spectral range ) is provided. For this purpose, the interface 5 or the sensor in particular has an illumination device or irradiation device (radiating or illuminating in the direction of the identifier) and a color sensor (sensitive in particular in relation to this direction).

If the identifier is implemented in the form of an optically recognizable imprint or label, the respective identifier of the tool head 3 (and thus the tool head 3 itself) is optically recorded, possibly also with simultaneous or previous irradiation or illumination of the area of the respective identifier with a corresponding electromagnetic radiation. For this purpose, visible light (i.e. a wavelength range from approx. 380 nm to approx. 750 nm) or infrared radiation (i.e. a wavelength range from approx. 750 nm to approx. 3 µm or up to approx. 50 µm, in particular IR-A (approx. 780 to approx. 1400 nm), IR-B (approx. 1400 nm to approx. 3 µm) or IR-C (approx. 3 µm to approx. 50 µm)) or ultraviolet radiation (i.e. a wavelength range from approx. 100 nm to approx. 380 nm, in particular UV-A (approx. 315 to approx. 380 nm), UV-B (approx. 280 nm to approx. 315 nm) or UV-C (approx. 100 nm to approx. 280 nm)) is used. The identification of a tool head 3 is implemented here in particular in the form of an imprint on a suitable surface or a suitable surface area, for example in the form of a barcode or barcode or as a multidimensional optical code, in particular as a QR code. Alternatively or in addition to an optically readable identifier (or an identifier with optically readable identification information), it is also possible and preferred according to the invention for the identifier to be provided in the form of an electromagnetically readable transponder element or RFID tag element.

In the figure 2 the tool system 1 is shown in the assembled state. The tool head 3 is placed on the drive unit 2 and locked in its desired position via the bayonet catch 6 . In the set position, the switch 9 of the connecting element 4 in particular is activated, so that the controller of the drive unit 2 recognizes the correct positioning of the tool head 3 . In the attached or locked state, the mechanical coupling element (the plunger 10 ′) of the drive unit 2 is in mechanical contact with the moving parts of the tool head 3 and can thus transmit the force generated by the drive to the tool head 3 . If the identification of the tool head 3 is, in particular, an optical or mechanical coding, the sensor 5 of the drive unit 2 and the coding are preferably arranged in such a way that they are opposite one another when the tool head 3 is in the desired position, so that the identification of the identification takes place exclusively with a correctly positioned tool head 3 .

In figure 3 the exemplary embodiment of the tool system 1 according to the invention is shown with a second tool head 3 . The second tool head 3 is designed for a nominal force of 32 kN and differs from that in FIGS Figures 1 and 2 illustrated tool head 3 additionally in various other operating sizes, such as maximum stroke, pressing time and the maximum nominal diameter of the connection material to be processed. The placement and locking takes place in the to figure 1 described way. For connection to the socket 4, the tool head 3 has two pin-shaped projections 5 (only one of the two is visible in the figure), which together with the L-shaped slots 7, 7' form the bayonet lock. The second tool head 3 also has a receptacle 11 which can accommodate a tool insert (not shown). The tool insert can be mechanically locked with the lock 12 so that the tool insert is firmly connected to the tool head 3 .

The identifier of the tool head 3 is automatically recognized by the sensor 5 when it is placed or locked, and the operating mode of the drive is selected accordingly by controlling the drive unit 2 . Here, compared to the first tool head 3 from the Figures 1 and 2 changed operating parameters are automatically taken into account without the need for manual adjustment by the user.

The drive unit 2 of the tool system 1 can also have a data memory (e.g. an SD card) and/or a data interface with which data can be transmitted to an external data processing device (in particular a PC, notebook, tablet or smartphone). In this way, the tool heads 3 used, the operating modes, the machined workpieces and/or the work cycle carried out can be logged in a log file or displayed graphically. This enables the work steps carried out to be traced and the tools and materials used to be assigned or documented. Data transmission can be wired (e.g. USB cable) or wireless (Bluetooth, WLAN).

In the figure 4 the tool system 1 is shown with the second tool head 3 in the assembled state. The tool head 3 is placed on the drive unit 2 and locked in its desired position via the bayonet catch 6 . In the attached (and correctly positioned) state, the controller of the drive unit 2 identifies the identifier of the tool head 3 and automatically sets the operating mode matched to the identifier or the tool head 3 .

the Figures 5 and 6 are each a detailed view of the drive unit 2. The connecting element 4 of the drive unit 2 is formed by a cylindrical bushing 4 provided with recesses 7, 7', which receives the cylindrical end of the tool head 3 and is locked by the bayonet catch 6. For this purpose, the recesses 7, 7′ are each L-shaped and each consist of a longitudinal slit, at the end of which there is a short transverse slit that runs essentially at right angles or at an angle. At its end, the transverse slot in turn has a short transverse segment 14, 14' which forms the serif of the L-shaped recess. When placing the tool head 3 is inserted into the socket 4, wherein a pin-shaped projection 8 of the tool head 3 slides into the longitudinal slot. By turning the tool head 3, the projection 8 then moves into the transverse slot and finally snaps into the serif 14, where it can be held in position, for example by a spring, so that the tool head 3 is fixed in its desired position. In the illustrated embodiment, the connecting element 4 has two L-shaped slots 7, 7', which interact with two pins 6 of the tool head 3.

For power transmission between drive unit 2 and tool head 3, a hydraulic drive sets in motion a mechanical coupling element in the form of a ram 10, which transmits the force generated by the hydraulic system to tool head 3 through mechanical contact. In the figure 6 the drive unit 2 is shown without the plunger 10', so that only the opening 10 is visible, through which the plunger 10' protrudes from the drive unit 2. In the figure 5 the ram 10' is shown together with its longitudinal direction of movement 13. The direction of movement 13 runs in particular in the axial direction of the tool head 3, ie in the direction of its longitudinal axis. The force generated by the drive is transmitted to the tool head 3 by mechanical contact through the ram 10'.

REFERENCE MARKS

1

tool system

2

drive unit

3

tool head

4

fastener

5

interface/sensor

6

locking mechanism

7

recess

7'

further recess

8th

head Start

9

Limit switch/sensor

10

Opening for plunger

10'

Plunger for power transmission

11

Tool holder

12

locking

13

direction of movement

14

transverse slit

14'

transverse slit

Claims (15)

Tool system (1) having a drive unit (2) and at least one tool head (3) that can be placed on the drive unit (2), characterized in that the drive unit (2) has a drive, a controller, a connecting element (4) and an interface ( 5), wherein the connecting element (4) is configured to releasably lock the tool head (3) placed on the drive unit (2) in a form-fitting manner, the drive being configured to transmit a mechanical force to the locked tool head (3). , wherein the controller is configured to identify an identifier of the tool head (3) via the interface (5) and to select an operating mode of the drive from a plurality of operating modes depending on the identified identifier. Tool system (1) according to claim 1, wherein the interface (5) is a mechanical interface, an electronic interface or a radio interface. Tool system (1) according to claim 1 or 2, wherein the interface (5) has an optical or acoustic sensor, a magnetic field sensor or a current sensor, the sensor being provided in particular as an optical sensor for color detection, In particular, the sensor is designed to detect an identifier in the form of an optically recognizable imprint or label or an optically recognizable surface, wherein the interface (5) also has an illumination device or irradiation device for generating electromagnetic radiation, in particular light radiation, in such a way that the area of the identifier is irradiated or illuminated with the corresponding electromagnetic radiation in order to record or detect the identifier, In particular, the identification or detection of the identifier takes place by optically detecting the identifier in each case, in particular by optically detecting a color or a plurality of colors or a plurality of arranged colored areas. Tool system (1) according to one of the preceding claims, wherein the operating mode is an amplitude of the transmitted to the tool head (3). mechanical force and/or an amplitude of a movement of the tool head (3) and/or a time profile of the mechanical force and/or the movement of the tool head (3). Tool system (1) according to one of the preceding claims, wherein the drive is a hydraulic, pneumatic or electric drive. Tool system (1) according to one of the preceding claims, wherein the connecting element (4) has a locking mechanism (6), in particular a bayonet lock. Tool system (1) according to one of the preceding claims, wherein the connecting element (4) is configured to engage when a desired position of the attached tool head (3) is reached, or the connecting element (4) has a sensor (9) or a contact element (9), in particular a switch for detecting the desired position of the tool head (3). Tool system (1) according to one of the preceding claims, wherein the controller is configured to use the connecting element (4) and/or the interface (4) to detect a positioning of the attached tool head (3) and in particular an incorrect position or a desired position of the tool head (3) to detect. Tool system (1) according to any one of the preceding claims, wherein the tool head (3) is configured to perform a movement for pressing, cutting and/or bending workpieces. Tool system (1) according to one of the preceding claims, wherein the drive unit (2) has an energy storage unit, in particular a lithium-ion battery. Tool system (1) according to any one of the preceding claims, wherein the drive unit (2) has an electronic data memory and / or is configured to transmit data via the interface or another interface to a to transfer external data processing equipment. Drive unit (2), characterized in that the drive unit (2) has a drive, a controller, a connection element (4) and an interface (5), the connection element (4) being configured to attachable tool head (3) in a detachable, form-fitting manner, the drive being configured to transmit a mechanical force to the locked tool head (3), the controller being configured to transmit an identifier of the tool head (3) via the interface (5) to identify and depending on the identified identifier to select an operating mode of the drive from a plurality of operating modes. Tool head (3), characterized in that the tool head (3) can be placed on a drive unit (2) according to claim 12, wherein the tool head (3) is configured to interact with the connecting element (4) of the drive unit (2) in such a way that the tool head (3) placed on the drive unit (2) can be releasably locked in a form-fitting manner. Tool head (3) according to claim 13, wherein the tool head (3) has an identifier which can be identified via an interface (5) of the drive unit (2). Tool head (3) according to claim 14, wherein the identifier is in the form of an optically recognizable imprint or label or an optically recognizable surface and that the identification or the detection of the identifier takes place by optically detecting the identifier in each case, in particular by optically detecting a color or a plurality of colors or a plurality of arranged colored areas, with the area of the identifier being irradiated or illuminated with a corresponding electromagnetic radiation in particular in order to record or detect the identifier.

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