EP2271446B1 - Outil de pliage présentant un élément de mesure - Google Patents

Outil de pliage présentant un élément de mesure Download PDF

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Publication number
EP2271446B1
EP2271446B1 EP09725896A EP09725896A EP2271446B1 EP 2271446 B1 EP2271446 B1 EP 2271446B1 EP 09725896 A EP09725896 A EP 09725896A EP 09725896 A EP09725896 A EP 09725896A EP 2271446 B1 EP2271446 B1 EP 2271446B1
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EP
European Patent Office
Prior art keywords
bending tool
measuring element
sensor
bending
measuring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP09725896A
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German (de)
English (en)
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EP2271446A1 (fr
Inventor
Andreas Bauer
Ulrich Meindl
Marc Janson
Lasse Dorsch
Jürgen Hohenadel
Nick Brunner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trumpf Maschinen Austria GmbH and Co KG
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Trumpf Maschinen Austria GmbH and Co KG
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Publication date
Application filed by Trumpf Maschinen Austria GmbH and Co KG filed Critical Trumpf Maschinen Austria GmbH and Co KG
Publication of EP2271446A1 publication Critical patent/EP2271446A1/fr
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Publication of EP2271446B1 publication Critical patent/EP2271446B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/26—Program-control arrangements

Definitions

  • the invention relates to a bending tool m a measuring element according to the preamble of patent claim 1 and a bending machine according to the preamble of claim 17.
  • Bending tools for bending machines, in particular press brakes are already known from the prior art, which have a measuring element, with the particular information about a workpiece to be bent or already bent workpiece are detected and can be forwarded to a control device of the bending machine. Due to the often different workpiece geometry while bending tools are in use, in which different measuring elements can be replaced with each other to capture relevant workpiece properties even with different workpiece geometries can.
  • the measuring elements may be, for example, to feeler elements with which the legs of an already bent workpiece are touched and due to known relationships between displacement of the feeler elements and measured position of the feeler elements in the probing process, a bending angle of the workpiece can be determined.
  • measuring elements can now be used in a bending tool, it is necessary for a correct evaluation of the measured values that the properties of the respectively used measuring element be included in the interpretation or calculation or evaluation of the measurement results, for which information about the measuring element, eg geometry data of the probe element or electrical data of an electrical encoder, either on the measuring element or in the control device of the bending machine are stored or stored, wherein at least one unique identification of the measuring element is required in stored in the control device parameters of the measuring elements used.
  • information about the measuring element eg geometry data of the probe element or electrical data of an electrical encoder
  • the object of the invention is to provide a bending tool in which identification features of a measuring element or directly required for the measurement evaluation parameters of the measuring element are permanently mounted or stored and can be read out in a reliable manner. Furthermore, the information should also be attachable to measuring elements with small dimensions.
  • a bending tool having the features of patent claim 1, according to which it has a measuring element and an element receptacle for detachable connection of the measuring element with the bending tool, wherein the measuring element has an information carrier and on the bending tool, in particular on the element receptacle, a sensor arrangement for contactless detection of at least one information contained in the information carrier, in particular a permanent identification feature of the measuring element is arranged.
  • the information carrier may be formed by a portion of the measuring element or may be subsequently attached to the measuring element.
  • the information carrier comprises at least one permanent magnet and the sensor arrangement comprises at least one Hall sensor.
  • a suitable for measuring magnetic field strengths Hall sensor can be used to detect the presence, positioning or orientation of a permanent magnet disposed on the measuring element, whereby a permanent magnet can be used as part of the information carrier on the measuring element.
  • part of the information of the information carrier can be embodied by the position of the permanent magnet relative to a reference point on the measuring element, whereby the Hall sensor or several Hall sensors measure different magnetic field intensities depending on the position of the permanent magnet on the measuring element and certain positions of certain measured values of the magnetic field strength or arrangements of one or more permanent magnets underlying the training of the measuring element, and thereby an identification is possible.
  • the Hall sensor may further be formed as a Hall angle sensor, whereby the orientation or the magnetic orientation of the permanent magnet can be detected and thereby the possibility exists to attach to different measuring elements permanent magnets in different orientation, thereby enabling identification.
  • the information of the information carrier may be embodied by the magnetic orientation of the permanent magnet relative to a reference direction of the measuring element.
  • the Hall angle sensor can be a composite of several individual Hall sensors unit that can easily distinguish eight or more magnetic orientations of the permanent magnet and thus eight or more different types of measuring elements with a small size.
  • the permanent magnet is at least partially inserted in a recess or a breakthrough on the measuring element. This can be done in particular by pressing into the recess or the breakthrough.
  • the permanent magnet may alternatively or additionally be connected by an adhesive layer to the measuring element, wherein the adhesive layer consists in particular of chemically resistant adhesives, for example. Resin based.
  • a further embodiment of the bending tool according to the invention can consist in that the information carrier comprises an optically readable information and the sensor arrangement comprises at least one optoelectronic sensor.
  • the information carrier comprises an optically readable information
  • the sensor arrangement comprises at least one optoelectronic sensor.
  • light serves as a medium for reading out the information contained in or on the information carrier.
  • the sensor arrangement comprises at least one light emitter for illuminating the optically readable information.
  • This light emitter can be advantageously formed by an LED, so a light emitting diode, which has low power requirements and can be accommodated in the bending tool thanks to small dimensions even in very confined spaces.
  • the optically readable information consists in that it is formed by at least one color marking on the surface of the measuring element and the sensor arrangement comprises at least one color sensor. Different colors of the color markers can thus be used to identify different embodiments of the measuring element.
  • the illumination with a separate light emitter known light composition of advantage.
  • the color sensor used for the sensor arrangement has a sufficient color resolution in order to be able to detect a sufficient number of different color markings and thus also of different measuring elements.
  • the CIE-Lab system can be used as the color measurement system, and the color sensor can comprise a plurality of selective component sensors with which the individual color components of the light emitted by the color code can be measured.
  • the selectivity of the part sensors can be achieved for example by means of color filters.
  • the optically readable information may comprise a one-dimensional or two-dimensional bar code on the surface of the measuring element and the sensor arrangement may comprise an opto-electronic bar code reading arrangement.
  • This coding by means of a bar code which is known from product labeling or even tool identification, can also be used with small dimensions of the measuring elements and also permits reliable contactless detection of the information contained in the measuring element or identification thereof.
  • the optically readable information may further comprise a hole pattern formed from at least one recess or an opening in the surface of the measuring element, which can also be detected with one or more optoelectronic sensors.
  • a marking through a hole pattern can, for example, be applied directly during the production of the measuring element, for example by laser processing or laser cutting, and forms a very robust and durable information carrier.
  • the optoelectronic sensor of the sensor arrangement can comprise at least one photocell with which light reflected by the measuring element or the information carrier arranged thereon or transmitted by a breakthrough light measuring currents in the photocell and thus recognizes the hole pattern and thus the measuring element can be identified.
  • the optoelectronic sensor can furthermore be formed by an analog or discrete optical position sensor (PSD) with which, for example, a position of an opening illuminated by a light source on the rear side can be measured at the information carrier or at the measuring element and by means of this measurement result the identification of the measuring element can be carried out.
  • PSD discrete optical position sensor
  • the optoelectronic sensor comprises a bi-color LED for emitting light onto the recess or the aperture in the surface of the measuring element and for the simultaneous detection of the light reflected from the surface.
  • bi-color LED's are available with very small sizes and can therefore detect hole pattern even on very small measuring elements.
  • the information carrier comprises an integrated circuit containing the information in binary coding.
  • the high storage densities of such integrated circuits that are already possible today make it possible to store the information necessary for an identification but also the parameters of the measuring element required for the measurement in the smallest space.
  • the contactless transmission of the information can be effected in such a way that the integrated circuit is data-connected to the sensor arrangement by means of capacitive coupling between an electrically conductive surface on the measuring element and an electrically conductive surface on the element receptacle.
  • the two surfaces on the measuring element and on the measuring receptacle, which are preferably opposite each other directly at a small distance, act like a capacitor, can be forwarded to the high-frequency AC signals and thus a non-contact read-out can be performed.
  • the integrated circuit may also be data-connected to the sensor element by means of inductive coupling between a coil arrangement on the measuring element and a coil arrangement on the element receptacle, wherein the non-contact read-out process is likewise effected by alternating current signals which lie between the two coil arrangements, which lie opposite each other directly at a small distance be transmitted in the form of magnetic field changes.
  • the information carrier may comprise an RFID element and the sensor arrangement may comprise an RFID reading unit.
  • RFID element for non-contact data transmissions are already known from the field of goods logistics and corresponding elements or reading units are also available in very small sizes.
  • the measuring element which can be inserted into the element receptacle on the bending tool can form the entire measuring device for detecting workpiece information
  • the measuring element it is also possible for the measuring element to be part of a tool arranged on the bending tool Measuring arrangement forms, which includes non-replaceable parts on the bending tool and the exchangeable in the element holder measuring element.
  • the measuring element can be designed as a mechanical probe element for determining a geometrical workpiece position or workpiece dimension, wherein the probing positions of the probe element are detected by the components of the measuring arrangement that are fixedly mounted on the bending tool.
  • the feeler element can have a feeler contour which touches two limbs of the workpiece to be bent, for example a circular contact disk, in which the position of the feeler disk within the angled workpiece to be measured is used to determine the bending angle.
  • the accuracy of the bending angle measurement can be additionally increased.
  • tactile elements is about WO 96/41690 the same applicant.
  • a reliable, non-contact readout of the information contained in the information carrier is achieved when the information carrier and the sensor arrangement to each other a distance selected from a range having a lower limit of 0.1 mm and an upper limit of 10 mm.
  • the smallest possible distance is advantageous, in particular, for the capacitive or inductive contactless transmission of the information when reading out an integrated circuit arranged on the measuring element, while greater distances are possible for the optical readout from a bar code or the measurement of a color marking.
  • a further advantageous embodiment of the bending tool according to the invention consists in that an interface for transmitting the information detected by the sensor arrangement to an electronic control device of a bending machine is formed on the bending tool. (Note: An execution without this feature probably does not seem to make sense technically feasible, the corresponding subclaim is likely to be deleted).
  • measurement signals generated by the measuring element can also be transmitted to the electronic control device via the aforementioned interface.
  • the interface is thereby used both for the forwarding of the identification feature of the measuring element and for the transmission of the measured data or measuring signals detected by means of the measuring element.
  • this interface may comprise electrical contact elements on the bending tool, which interact with corresponding contact elements on a tool holder on a bending machine.
  • the invention further relates to a bending machine, in particular a press brake, comprising a tool holder, at least one bending tool which can be coupled to the tool holder and a control device, wherein the bending tool is designed according to the invention.
  • a bending machine in particular a press brake, comprising a tool holder, at least one bending tool which can be coupled to the tool holder and a control device, wherein the bending tool is designed according to the invention.
  • the measuring element respectively used in the bending tool can be reliably and independently identified by the control device, whereby measurement errors caused by the offset of incorrect measuring element parameters are largely prevented.
  • the measuring element comprises an information carrier and at least one information contained therein is detected without contact by means of a sensor arrangement, in particular on the element receptacle. This information can be transmitted in sequence to a control device of a bending machine.
  • This method of identification compared to the above-mentioned previous method of identifying a usable in a bending tool measuring element on a much higher reliability and thereby avoids the occurrence of measurement errors.
  • the information detected by the sensor arrangement is processed via the measuring element used directly by a measuring device arranged in the bending tool and the processing of the measured data takes place in the bending tool
  • the method can also be used in such a way that the information of the information carrier is detected by the sensor arrangement during a relative movement between the measuring element and the element holder when the measuring element is inserted.
  • Fig. 1 shows a bending machine 1 according to the invention in the form of a press brake 2 comprising a machine frame 3, which has a fixed lower press table 4 and on which an approximately vertically adjustable adjustable upper press bar 5 is arranged.
  • Press table 4 and / or pressing bars 5 have a tool holder 6, in which at least one bending tool 7 can be used.
  • the bending tool 7 is formed on the press table 4 by a lower tool 8 in the form of a V-die 9, the bending tool 5 arranged on the bending tool 7 is formed by an upper tool 10 in the form of a punch 11.
  • Lower tool 8 and upper tool 10 together form a bending tool set with the example.
  • a free-bending process, a stamping bending process or a 3-point bending process can be performed.
  • the vertical adjustment movement of the press beam 5 is effected by an adjusting device 12 which comprises an adjusting drive, for example one or more fluid cylinders and a guide on the machine frame 3, wherein the adjusting movement is controlled by a programmable electrical control device 13.
  • an adjusting device 12 which comprises an adjusting drive, for example one or more fluid cylinders and a guide on the machine frame 3, wherein the adjusting movement is controlled by a programmable electrical control device 13.
  • the tool holders 6 on the press table 4 or on the press bar 5 allow the insertion of bending tools 7 of different types, wherein as in Fig. 1 indicated that upper tool 10 and the lower tool 8 may each be composed of a plurality of bending tools 7.
  • the upper tool 10 includes in the illustrated embodiment, a bending tool 14 according to the invention, with a in Fig. 1 not shown measuring element is equipped, and that for detecting a relevant for a bending process measurement, in particular measurements on a to be bent or already bent Workpiece is suitable.
  • the measuring signals or measured values detected by the measuring element in the bending tool 14 are transmitted to the control device 13 and can be used to determine adjustment parameters of the bending machine 1 or for subsequent analysis of already performed bending operations.
  • the transmission of the measurement signals from the bending tool 14 to the control device 13 is in Fig. 1 indicated by a dashed connection line 15, of course, wireless transmission is possible.
  • Fig. 2 shows a sectional view of a bending tool 14 according to the invention used in a tool holder 6.
  • Fig. 2 shows an upper tool 10, the features of the invention can of course also on a bending tool 14, as the lower tool 8 (see Fig. 1 ) is present.
  • this has the same cross-sectional shape as a conventional bending tool 7, and is used with a fastening extension 16 in a mounting groove of the tool holder 6.
  • the bending tool 14 has an element receptacle 18, here in the form of a vertically extending in the direction of the bending plane 19 receiving bore 20.
  • a replaceable measuring element 21 is used, which is designed in this embodiment as a probe 22.
  • This comprises an outer sleeve member 23 in which a probe element 24 is adjustably mounted in the direction of the double arrow 25.
  • the probe element 24 has a Tastkontur here in the form of a Tastusion 26, with a bent, not shown workpiece can be touched and from this a bending angle can be determined on the workpiece.
  • the measuring sensors required for this purpose are contained in the measuring element 21, and will not be explained in detail at this point.
  • this is a displacement measuring system or position measuring system with which a displacement of the probe element 24 relative to the sleeve element 23 can be measured.
  • the measuring element 21 is interchangeable with another measuring element 21 ', which has a different contact disk 26' with a changed dimension and is suitable, for example, for other bending angle measuring ranges.
  • the measuring signals are guided by the measuring element 21 by means of a connecting line 27 indicated by dash-dotted lines to an interface 28 between the bending tool 14 and the tool holder 6 and transmitted by the latter by means of a further connecting line 29 to the control device 13, from which the measuring signals are evaluated.
  • a connecting line 27 indicated by dash-dotted lines to an interface 28 between the bending tool 14 and the tool holder 6 and transmitted by the latter by means of a further connecting line 29 to the control device 13, from which the measuring signals are evaluated.
  • a wireless transmission of measuring signals to the control device 13 is possible.
  • an information carrier 30 is arranged, which is formed either by a portion of the measuring element 21 itself or by a subsequently attached to this component.
  • This information carrier 30 carries information that is required for a correct evaluation of the measuring signals of the measuring element 21, and in particular comprises an identification feature 31, by means of which the control device 13 can recognize which measuring element 21 is inserted in the element receptacle 18 of the bending tool 14.
  • a non-contact sensor arrangement 32 is arranged on the bending tool 14, here on the element holder 18, which can read out the information contained on the information carrier 30 without contact. This information is transmitted in sequence via the dash-dotted lines indicated connection line 33 to the interface 28, via which the information is transmitted to the control device 13.
  • the sensor assembly 32 is arranged on the bending tool 14 so that it is opposite to the information carrier 30 at a small distance with fully inserted measuring element 21, whereby the non-contact readout process does not have to be over a long distance and therefore can be done with low interference.
  • Fig. 3 shows in an enlarged section the upper end of the measuring element 21 according to Fig. 2 from which it can be seen that between the information carrier 30 and the sensor assembly 32, a distance 34 is present, and no contact takes place by means of contacts or the like. Due to the non-contact operation of the sensor arrangement 32, however, the read-out process indicated by an arrow 35 can nevertheless be carried out and, for example, the identification feature 31 contained in the information carrier 30 can be transmitted to the control device 13.
  • the outer sleeve member 23 and the adjustable therein in the direction of the double arrow 25 mounted probe element 24 recognizable, the position of which, as indicated here, with a measuring sensor 36, in particular a position sensor 37 can be detected.
  • the forwarding of these measurement signals to the interface 28 can be as in Fig. 3 shown, via its own formed between the measuring element 21 and the bending tool 14 measuring interface 38 which, for example, also electrical contacts includes, but the transmission of the measuring signals can also be done via the sensor assembly 32, if also be read-without measuring signals are generated with the measuring sensor 36 can be detected in sequence by means of the sensor arrangement 32 and forwarded to the control device 14.
  • Fig. 4 shows the principle of non-contact information transfer from the information carrier 30 to the sensor assembly 32 by means of a magnetic field.
  • the information carrier 30 comprises a permanent magnet 39 and the sensor arrangement 32 a magnetic field sensor 40.
  • the magnetic field sensor 40 detects the presence or position or orientation of the magnetic field caused by the permanent magnet 39 and thereby the arrangement, positioning or alignment of one or more permanent magnets 39 the information contained on the information carrier 30 of the measuring element 21, for example, form an identification feature 31.
  • the magnetic field sensor 40 can be designed, for example, as a magnetoresistive sensor (AMR type) whose electrical resistance is influenced by the presence and / or the strength and / or the orientation of a magnetic field of the permanent magnet 39 and can thus be used for identification.
  • AMR type magnetoresistive sensor
  • the magnetic field sensor 40 can detect only the presence of a permanent magnet 39, a plurality of different types of sensing elements 21 can be detected when a combination of a plurality of permanent magnets and a plurality of magnetic field sensors 40 is
  • the magnetic field sensor 40 is designed as a Hall sensor arrangement 41, with which also the presence, the positioning or the orientation a magnetic field caused by the permanent magnet 39 can be detected.
  • a current-carrying Hall sensor 42 of the Hall sensor arrangement 41 an output voltage which is proportional to the product of the current intensity and the magnetic field strength is effected by a magnetic field running perpendicular thereto. With known current intensity can thus be expected on the magnetic field strength and from the presence, the position or the orientation of a permanent magnet 39 are detected.
  • the Hall sensor arrangement 41 comprises four Hall sensors 42, which can determine an angle 45 between a reference direction 43 and a magnetic field orientation 44 by means of a corresponding electrical circuit and evaluation logic.
  • Such units comprising a plurality of Hall sensors 42 can form a Hall angle sensor 46, which is also available in very small dimensions of a few mm 2 . Due to the high angular resolution of such Hall angle sensors 46 alone with a permanent magnet 39, a number of at least eight or more different magnetic field orientations 44 and thus also different embodiments of the measuring element 21 can be reliably determined without contact.
  • a disturbing influence of foreign magnetic fields on the sensor arrangement 32 can be largely prevented.
  • Fig. 4 shows further that alternatively or in addition to an angle 45 of the magnetic field alignment 44 also a position 47 with respect to a reference point 48, which influences the magnetic field or the Hall sensor 42 influences and therefore also the position 47 of the permanent magnet 39 on the information carrier 30 or
  • the measuring element 21 can serve as an identification feature 31.
  • reed contacts which can perform switching functions under the action of a magnetic field, can also be used as part of the sensor arrangement 32.
  • Another principle of the contactless transmission of the information stored in the information carrier to the sensor arrangement is that the information carrier 30 comprises optically readable information and the sensor arrangement 32 comprises at least one optoelectronic sensor.
  • Fig. 5 shows a possible example of such an embodiment in which two optoelectronic sensors 49 are part of the sensor arrangement 32 in the area of the element receptacle 18.
  • the information carrier 30 contains the information about the measuring element 21 in the form of a hole pattern on its surface, which is formed by one or more recesses 50 or openings in the information carrier 30.
  • the contactless detection of the information thus formed takes place by 30 light is emitted from the optoelectronic sensor 49 by a light emitter 51 in the direction of the surface 52 of the information carrier and light detected by a photocell 53 from the surface 52.
  • the light emitted by the light emitter 51 is due to the light formed in the information carrier 30 recess 50 is not or only to a very limited extent and therefore the presence of the recess 50 can be detected by the photocell 53.
  • a bi-color LED 54 can be used as optoelectronic sensor 49, of which one LED serves as light emitter 51 and the second LED is used as photocell 53.
  • Fig. 5 only two optoelectric sensors 49 are provided with which each two states - recess 50 present or recess 50 not present - can be detected.
  • four different hole patterns can be detected with the illustrated sensor arrangement 32 and therefore four different measuring elements 21 can be identified without contact.
  • this number can be increased, in which a larger number of opto-electric sensors 49 and an adapted extended hole pattern is used.
  • apertures are used in the information carrier 30, instead of the light reflected from the surface 52, light passing through the information carrier 30 can also be used if the light emitter 51 and the photocell 53 are arranged at opposite ends of an aperture.
  • the translucent aperture in the information carrier 30 may of course be filled with a translucent material, whereby the breakthrough can not be opaque by dirt deposits in its interior.
  • Fig. 6 shows another possible embodiment with optical readout of the information contained in the information carrier 30, in which the information carrier 30 has on its surface 52 an optically readable bar code 55 and the sensor assembly 32 on the bending tool 14 and the element holder 18 includes an optoelectronic bar code reading device 56.
  • This can be arranged so that it detects the bar code 55 in the inserted state of the measuring element 21 or else can detect the bar code 55 while moving past in the direction of movement 57 during insertion of the measuring element 21 into the element holder 18.
  • the read-out process can also be detected by the sensor arrangement 32 during a relative movement between measuring element 21 and element holder 18 when the measuring element 21 is inserted.
  • a one-dimensional bar code is shown, but of course two-dimensional bar codes can also be used.
  • Fig. 7 shows a further embodiment with optical readout of the information contained in the information carrier 30, in which the information is represented by a distance 47 of a passage 58 on the information carrier 30 with respect to a reference point 48.
  • the detection of this position 47 takes place by irradiation of the information carrier 30 by means of an elongated light emitter 51 on a first side of the aperture 58 and measurement of the light beam passing through the aperture 58 by means of an optoelectronic sensor 49 in the form of an optical position sensor 59 (PSD - position sensitive device), which, depending on the position 47 at which the light beam impinges, outputs a specific voltage signal which is transmitted to the control device or an evaluation logic.
  • PSD - position sensitive device optical position sensor 59
  • light emitter 51 shown in an oblong manner can also be formed by a plurality of punctiform light sources if the positions 47 of the opening 58 which are possible on the information carrier 30 are adapted thereto.
  • Fig. 8 shows a section of a bending tool 14 according to the invention with a measuring element 21 inserted in an element holder 18, which has an information carrier in the form of an integrated circuit 60 in which the information about the measuring element 21, in particular an identification feature 31 is stored in a memory element 61 indicated by dashed lines.
  • the memory element 61 can advantageously be a non-volatile memory, which makes it possible to dispense with a power supply source in the measuring element 21 to maintain the information.
  • the contactless detection of the information contained in the memory element 61 by the sensor arrangement 32 takes place in this embodiment by means of capacitive coupling between two arranged on the measuring element 21 electrically conductive surfaces 62 and two arranged on the bending tool 14 and the element holder 18 also electrically conductive surfaces 62 ', the Face 62 faces at a small distance.
  • the two opposing surfaces 62, 62 ' are electrically insulated from each other by the air gap 63 in between and act like capacitor surfaces and are therefore suitable for the transmission of electrical, in particular high-frequency, alternating fields.
  • the sensor element 32 can read out the information contained in the integrated circuit 60, in particular in the memory element 61, by means of capacitive coupling, and in this way an identification of the measuring element 21 can take place.
  • Fig. 9 shows a further possible embodiment of a bending tool 14 according to the invention, in which the information carrier 30 is also formed by an integrated circuit 60 with a memory element 61 or includes such and the air gap 63 between the measuring element 21 and bending tool 14 is bridged by inductive coupling.
  • the integrated circuit 60 is connected to a first coil arrangement 64 and the sensor arrangement 32 comprises a second coil arrangement 65 between which the information contained in the information carrier 30 in the form of an integrated circuit 60 information can be transmitted without contact via the air gap 63 by means of high-frequency electromagnetic oscillations.
  • coil assemblies 64 and 65 other equivalent antenna arrangements may be provided.
  • the integrated circuit 60 and the coil arrangement 64 can be combined to form an RFID element 66, which has already been state-of-the-art in the area of logistics and product labeling.
  • the sensor arrangement 32 is designed as an RFID reading unit 67, whereby the information contained in the RFID element 66 can be read without contact.
  • a color marking 68 can be used as the information carrier, the sensor arrangement 32 in this case comprising at least one color sensor 69, with which the color of the light emitted by the color marking 68 is measured and from this by means of a predefined color code in the manner of used measuring element 21 can be closed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Claims (17)

  1. Outil de pliage (14), comprenant un élément de mesure (21) et un logement d'élément (18) pour la liaison amovible de l'élément de mesure (21) avec l'outil de pliage (14), caractérisé en ce que l'élément de mesure (21) présente un support d'information (30), et qu'il est disposé à l'outil de pliage (14), en particulier au logement d'élément (18), un agencement de capteurs (32) fonctionnant sans contact pour la détection d'au moins une information se trouvant dans le support d'information (30), en particulier d'une caractéristique d'identification durable (31) de l'élément de mesure (21).
  2. Outil de pliage (14) selon la revendication 1, caractérisé en ce que le support d'information (30) comprend au moins un aimant permanent (39), et l'agencement de capteurs (32) comprend au moins un capteur de champ magnétique (40), en particulier un capteur de Hall (42).
  3. Outil de pliage (14) selon la revendication 2, caractérisé en ce qu'au moins une partie de l'information du support d'information (30) est formée par la position (47) de l'aimant permanent (39) relativement à un point de référence (48) à l'élément de mesure (21).
  4. Outil de pliage (14) selon la revendication 2 ou 3, caractérisé en ce que le capteur de champ magnétique (40) est réalisé comme capteur d'angle de Hall (46).
  5. Outil de pliage (14) selon la revendication 4, caractérisé en ce qu'au moins une partie de l'information du support d'information (30) est formée par une orientation de champ magnétique (44) de l'aimant permanent (39) relativement à une direction de référence (43) à l'élément de mesure (21).
  6. Outil de pliage (14) selon l'une des revendications précédentes, caractérisé en ce que le support d'information (30) comprend une information lisible optiquement, et l'agencement de capteurs (32) comprend au moins un capteur opto-électrique (49).
  7. Outil de pliage (14) selon la revendication 6, caractérisé en ce que l'agencement de capteurs (32) comprend au moins un émetteur de lumière (51) pour éclairer l'information lisible optiquement.
  8. Outil de pliage (14) selon la revendication 6 ou 7, caractérisé en ce que l'information lisible optiquement comprend au moins un marquage en couleur (68) à la surface (52) de l'élément de mesure (21), et l'agencement de capteurs (32) comprend au moins un capteur de couleur (69).
  9. Outil de pliage (14) selon la revendication 6 ou 7, caractérisé en ce que le support d'information (30), en tant qu'information lisible optiquement, comprend un code à barres (55) unidimensionnel ou bidimensionnel à la surface (52) de l'élément de mesure (21), et l'agencement de capteurs (32) comprend un agencement de lecture de code à barres opto-électronique (56).
  10. Outil de pliage (14) selon l'une des revendications 6 à 9, caractérisé en ce que l'information lisible optiquement comprend un motif à trous formé par au moins un évidement (50) ou un perçage dans la surface (52) de l'élément de mesure (21).
  11. Outil de pliage (14) selon l'une des revendications 6 à 10, caractérisé en ce que le capteur opto-électrique (49) est formé par un capteur de position optique analogique ou discret (PSD) (59).
  12. Outil de pliage (14) selon la revendication 10, caractérisé en ce que le capteur opto-électrique (49) comprend une DEL bicolore (54) pour l'émission de lumière sur l'évidement (50) ou le perçage dans la surface (52) de l'élément de mesure (21) et pour la détection simultanée de la lumière réfléchie par la surface (52).
  13. Outil de pliage (14) selon l'une des revendications 1 à 12, caractérisé en ce que le support d'information (30) comprend un circuit intégré (60) contenant l'information en codage binaire.
  14. Outil de pliage (14) selon l'une des revendications 1 à 13, caractérisé en ce que l'élément de mesure (21) fait partie d'un agencement de mesure disposé à l'outil de pliage (14).
  15. Outil de pliage (14) selon la revendication 14, caractérisé en ce que l'élément de mesure (21) comprend un élément de tâtage mécanique (24) pour la détermination d'une position géométrique de la pièce ou d'une dimension de la pièce.
  16. Outil de pliage (14) selon l'une des revendications 1 à 15, caractérisé en ce qu'est réalisé à l'outil de pliage (14) une interface (28) pour la transmission de l'information détectée par l'agencement de capteurs (32) à un dispositif de commande électronique (13) d'une machine de pliage (1).
  17. Machine de pliage (1), en particulier presse de pliage (2), comprenant un logement d'outil (6), au moins un outil de pliage (14) apte à être couplé avec le logement d'outil (6) et un dispositif de commande (13), caractérisée en ce que l'outil de pliage (14) est réalisé selon l'une des revendications 1 à 16.
EP09725896A 2008-03-28 2009-03-27 Outil de pliage présentant un élément de mesure Not-in-force EP2271446B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0048508A AT506604B1 (de) 2008-03-28 2008-03-28 Biegewerkzeug mit messelement
PCT/AT2009/000123 WO2009117756A1 (fr) 2008-03-28 2009-03-27 Outil de pliage présentant un élément de mesure

Publications (2)

Publication Number Publication Date
EP2271446A1 EP2271446A1 (fr) 2011-01-12
EP2271446B1 true EP2271446B1 (fr) 2012-08-29

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Application Number Title Priority Date Filing Date
EP09725896A Not-in-force EP2271446B1 (fr) 2008-03-28 2009-03-27 Outil de pliage présentant un élément de mesure

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EP (1) EP2271446B1 (fr)
AT (1) AT506604B1 (fr)
WO (1) WO2009117756A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT519002B1 (de) * 2016-09-16 2018-03-15 Trumpf Maschinen Austria Gmbh & Co Kg Biegewerkzeug, insbesondere ein Oberwerkzeug oder einen Biegestempel, und ein Betriebswechselverfahren
NL2018393B1 (nl) * 2017-02-20 2018-09-17 Wila Bv Inrichting voor het inklemmen van een gereedschap en werkwijze voor het vervaardigen van een dergelijke inrichting

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19521369C2 (de) 1995-06-12 2000-06-29 Trumpf Gmbh & Co Bearbeitungsmaschine zum Umformen von Werkstücken
JP3691121B2 (ja) * 1995-08-10 2005-08-31 株式会社アマダ 折曲加工装置
US6163734A (en) * 1996-07-05 2000-12-19 Amada Co Ltd Punching tool provided with tool identification medium and punch press provided with a tool identification medium reader cross reference to related application
ITPR20030087A1 (it) * 2003-10-03 2005-04-04 Schiavi Macchine Ind Spa Dispositivo di sicurezza per presse piegatrici di lamiere.
DE102004024953A1 (de) * 2004-05-21 2005-12-08 Sick Ag Sicherungsverfahren und Sicherheitseinrichtung für eine Maschine, insbesondere eine Biegepresse

Also Published As

Publication number Publication date
WO2009117756A1 (fr) 2009-10-01
EP2271446A1 (fr) 2011-01-12
AT506604B1 (de) 2009-12-15
AT506604A1 (de) 2009-10-15
WO2009117756A8 (fr) 2010-02-04

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