EP4090497A1 - Outil de serrage doté d'un capteur de force de serrage - Google Patents

Outil de serrage doté d'un capteur de force de serrage

Info

Publication number
EP4090497A1
EP4090497A1 EP21700562.8A EP21700562A EP4090497A1 EP 4090497 A1 EP4090497 A1 EP 4090497A1 EP 21700562 A EP21700562 A EP 21700562A EP 4090497 A1 EP4090497 A1 EP 4090497A1
Authority
EP
European Patent Office
Prior art keywords
clamping
clamping tool
tool according
connecting member
transmitting
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.)
Granted
Application number
EP21700562.8A
Other languages
German (de)
English (en)
Other versions
EP4090497C0 (fr
EP4090497B1 (fr
Inventor
Zbigniew Noniewicz
Andree Schumacher
Jürgen ZIMMER
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.)
Wolfcraft GmbH
Original Assignee
Wolfcraft GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wolfcraft GmbH filed Critical Wolfcraft GmbH
Publication of EP4090497A1 publication Critical patent/EP4090497A1/fr
Application granted granted Critical
Publication of EP4090497C0 publication Critical patent/EP4090497C0/fr
Publication of EP4090497B1 publication Critical patent/EP4090497B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/068—Arrangements for positively actuating jaws with at least one jaw sliding along a bar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B5/00—Clamps
    • B25B5/16—Details, e.g. jaws, jaw attachments

Definitions

  • the invention relates to a clamping tool with a device for generating a clamping position, in which two clamping elements apply a clamping force to a workpiece, the counterforce of which is absorbed by a connecting member connecting the clamping elements, with an element that deforms when the clamping force is generated and with a sensor element that converts the deformation of the deformable element into an electrical signal, from the value of the clamping force can be determined.
  • the invention also relates to a method for operating the clamping tool in combination with a transmitting / receiving device.
  • US Pat. No. 6,758,098 B1 also describes a C-shaped clamp in which a strain gauge is used to determine a clamping force through the deformation of a deformable element.
  • DE 212005000037 U1 describes a one-hand clamp with a sensor for determining the force applied, the sensor being arranged on a clamping jaw.
  • DE 102013101479 A1 describes a clamp with a fixed clamping jaw which is fixedly arranged on a rod and a movable clamping jaw which is carried by a drive housing. Inside the drive housing there is a drive body which can be displaced by the back and forth pivoting movement of a drive arm relative to the rod in the direction of the fixed jaw or in another mount in the direction away from the fixed jaw. When the drive arm is actuated, the drive body becomes misaligned on the rod in order to be displaced back again after actuation by a return spring from a blocking element on the rod. The blocking element forms a back pressure lock which can be canceled by actuating a release lever.
  • the invention is based on the object of further developing a generic clamping tool in an advantageous manner.
  • the deformable element which is deformed when the clamping force is applied, is a blocking element via which one of the clamping elements is supported on the connecting member in the clamping position.
  • the blocking element is designed and has such a function as is described in DE 102013101479 A1. The full content of the disclosure of this document is therefore with in this application included, also in order to incorporate features of this document into the claims.
  • the blocking element can be brought from a blocking position supported on the connecting member into a release position, then the clamping element supported with the blocking element on the connecting member, so in particular a clamping jaw in the release position in the direction of the Relocate counterforce against the connecting link, for example a rod.
  • the tensioning element can be arranged on a drive housing which can be displaced along the connecting member. In the release position, the drive housing can be shifted in particular in the direction of extension of the connecting member, wherein the drive housing can have a drive member, in particular in the form of a drive arm, with which the drive housing can be displaced gradually in the direction of the clamping force by repeating the drive member.
  • the sensor element can be formed by a strain measuring element.
  • the sensor element is arranged in particular on a surface of the blocking element. It can be stuck on there. It can be in a pocket. It can also be fastened elsewhere on the blocking element. It is essential that a deformation, in particular an expansion, of the blocking element is transmitted to the sensor element so that the deformation can be converted into an electrical signal from which the clamping force can be determined.
  • the element, in particular the blocking element can have a window through which the connecting member, for example a rod, extends.
  • the window can have two parallel legs, each of which adjoins edges that cant in the blocking position on the connecting member.
  • the sensor element can be arranged on one of these legs. The sensor element can thus extend next to the rod.
  • an electronic device can be provided, which the sensor element evaluates delivered signals.
  • the evaluation can take place in such a way that a value of the clamping force is determined.
  • the sensor element can communicate with a transmitting / receiving device via a wired or wireless transmission path.
  • the signals supplied by the sensor element or the signals or data determined by the electronic device can be transmitted from the clamping tool to the transmitting / receiving device via the transmission path.
  • the transmitting / receiving device is a mobile terminal, for example a tablet computer or a smartphone.
  • the clamping tool according to the invention is used together with a mobile terminal, the mobile terminal being programmed in such a way that it can show the data or values supplied on a display, for example a display.
  • the mobile terminal is preferably programmed in such a way that a use case can be selected from a group of use cases in the program, a maximum and / or minimum clamping force being assigned to each of the use cases of the group of use cases.
  • the program is then able to provide information to a user as to whether a minimum clamping force has been reached or whether a maximum clamping force has been exceeded.
  • the invention also relates to a method for using the tool according to the invention with a transmitting / receiving device which is able to display the values of the clamping force or values derived therefrom. According to a further development of the invention, it is provided that the clamping tools of a plurality of clamping tools each have an electronic device which evaluates signals supplied by the sensor element.
  • the electronic device is able to emit a sensually, in particular optically or acoustically detectable signal when the actual value of the clamping force deviates from the target value, is outside a target value window, is below a threshold value or above a threshold value.
  • each of the plurality of jointly used clamps emits a different signal, in particular a different acoustic signal, so that the type of signal can be used to identify which clamp has a clamping force deviation.
  • Fig. 1 is a plan view of a clamping tool as it is known from DE 10 2013101479 A1,
  • FIG. 2 enlarges the section designated II in FIG. 1 with the housing cover removed in a basic position
  • FIG. 3 shows a representation according to FIG. 2, however, in a release position
  • FIGS. 2 and 3 shows the blocking element shown in FIGS. 2 and 3 in a plan view
  • FIG. 5 shows the blocking element in a perspective illustration.
  • a first clamping element 3 forms a fixed clamping jaw which is attached by means of an arm to a free end of a connecting link 1, which is a rod, the rod having a flat, oval or round cross-section and can be made of steel.
  • the arm carrying the jaw 3 can also be attached to the other free end of the rod (connecting link 1). Then the clamping tool does not work as a clamp but as an expanding clamp.
  • a second clamping element 4 which forms a clamping jaw, is attached to a drive housing 6.
  • the drive housing is slidably mounted on the connecting member 1. It can always be relocated in the direction of arrow K. In the direction of arrow G, however, only when a release lever 14 is actuated.
  • a protruding into the drive housing 6 arm of the drive member 7 acts against a drive body 16 which has a window through which the connecting member 1 formed by a flat steel, round steel, oval steel or polygonal steel protrudes.
  • the drive body 16 tilts on the two narrow sides of the connecting member 1, so that the drive body cannot move relative to the connecting member 1.
  • a further pivoting of the drive member 7 then leads to a displacement of the drive housing 6 ge compared to the connecting member 1 in a tensioning direction K. After releasing the tensioning force applied to the drive member 7 causes a spring element 18 a displacement of the drive body 16 back into the starting position, where the drive body 16 is displaced with respect to the connecting member 1.
  • a blocking element 2 is provided which is held by a spring element 17 in a blocking position in which two narrow edges of a window 8 canted on the narrow edges of the Support the connecting link 1 so that the drive housing 6 is not displaced in the direction of the counterforce G with respect to the connecting link 1 who can. Only by actuating the release lever 14, the cam 19 of which is arranged at the end of an arm, brings the blocking element 2 out of the blocking position, enables the drive housing 6 to be displaced back in the counterforce direction G.
  • the blocking element 2 In a clamping position, the blocking element 2 is acted upon in a deforming manner. This is an expanding deformation in the direction of extension of the window 8.
  • the two edges 10 of the window 8 are spaced apart as a function of the clamping force K.
  • the window 8 is formed by a frame which has two parallel frame legs 9, 9 ', which are stretched in the tensioned position.
  • a sensor element 5 is located on one of these legs 9, 9 '.
  • the sensor element 5 is a strain gauge.
  • the strain gauge 5 can be glued to the leg 9 of the frame that frames the window 8.
  • the sensor element 5 is located in particular between two lines defined by the two edges 10.
  • the strain gauge is arranged in particular where the blocking element is stretched by the transmission of the clamping force from the clamping element 4 to the connecting member 1. Cables 12 can be provided, with which the sensor element 5 is connected to an electrical device 11.
  • the electrical device 11 can have a battery with which it is supplied with electrical energy.
  • the electrical device 11 can have a transmitting / receiving antenna in order to exchange data with an external transmitting / receiving device 20 along a wireless communication path 13, 13 ′.
  • an electrical contact (not shown) can also be provided in order to establish a wired communication path with an external electrical device.
  • the external electrical device which forms a transmitting / receiving device, is formed by a mobile terminal, for example a tablet computer or a smartphone.
  • the mobile terminal is denoted by the reference number 20.
  • values can be shown that are measured with the sensor element 5.
  • the mobile terminal 20 is programmed in such a way that an application can be selected from a group of application cases.
  • a limit value is assigned to each of the use cases.
  • the limit value can be a minimum clamping force, a maximum clamping force or a range between a minimum and a maximum clamping force.
  • On the display 21 it can be shown whether the application between the clamping elements 3, 4 is in a valid range for the particular application selected.
  • the applications can be, for example, the clamping of various materials or workpieces.
  • the display 21 can emit a signal, for example an optical or an acoustic signal, if a minimum clamping force is not reached or a maximum clamping force is exceeded.
  • the maximum allowable clamping force depends on the application, so for example on the type of material, such as the hardness of the wood that is glued with the help of the clamping tool.
  • An application which concerns the gluing of soft woods can have a lower limit value for the maximum tension force to be applied than an application for a harder wood.
  • the invention also relates to a method and a use in which a plurality of essentially identically designed clamping tools communicate with an external transmitting / receiving device 20.
  • the display 21 of the transmitting / receiving device 20 can then display all clamping forces that the clamping tools exert on a workpiece. It can be shown visually which of the large number of clamping tools has to be tightened or which clamping tool the clamping force is to be reduced so that all clamping tools exert a uniform clamping force on the workpiece.
  • a plurality of clamps can be arranged in series one behind the other, the clamps to exert a predetermined clamping force on a workpiece.
  • Each of the clamps can emit an optical or acoustic or otherwise sensible signal when the actual value of the clamping force deviates from a target value, lies outside a target value window, falls below a target value or exceeds a target value.
  • the signals to be emitted can differ in a suitable manner, so that in the case of several of the clamps it can be differentiated on the basis of the emitted signals, from which clamp the signal was emitted.
  • the acoustic signals can differ, for example, by pitch, tone sequence or the same.
  • a clamping tool which is characterized in that the deformable element is an element 2, via which one of the clamping elements 4 is supported on the connecting member 1 in the clamping position.
  • a clamping tool which is characterized in that the element is a blocking element 2, which can be brought into a release position by a support on the connecting member 1, the clamping element 4 supported on the connecting member 1 with the blocking element 2 in the Release position in the direction of the counterforce G relative to the connec tion member 1 can be shifted.
  • a clamping tool which is characterized in that the clamping element 4 supported with the blocking element 2 on the connecting member 1 is assigned to a drive housing 6 which can be displaced in the release position in the direction of extension of the connecting member 1, the drive housing 6 being a drive member 7, with which the drive housing 6 can be displaced step by step in the direction of the clamping force K by a repetitive movement of the drive member and the blocking element 2 forms a back pressure lock.
  • a clamping tool which is characterized in that the sensor element 5 is a strain measuring element which is fastened to a surface of the blocking element 2.
  • a clamping tool which is characterized in that the sensor element 5 is arranged on a leg 9 of a frame framing a window 8, the connecting member 1 extending through the window 8.
  • a clamping tool which is characterized in that two opposing edges of the window 8 form edges 10 which cant in the blocking position on the connecting member 1, with at least one of two legs 9, which connect the two edges 10 forming edges to one another, 9 ', which in particular wear sensors designed as a strain gauge 5.
  • a clamping tool which is characterized in that an electronic device 11 is provided which evaluates the signals supplied by the sensor element 5 and determines a value of the clamping force K and / or transmits the signals and / or that the electronic device 11 is set up in such a way that the optical or acoustic signals generated by a clamping clamp can be distinguished from another clamping clamp that is used together with one clamping clamp ..
  • a clamping tool which is characterized in that a wire-bound or wireless transmission path 13 is provided with which the signals supplied by the sensor element 5 or values determined by the electronic device 11 away from the clamping tool to a transmitting / receiving device 20 can be transferred.
  • a method which is characterized in that a data communication 13, 13 'is established with a transmitting / receiving device 20, the transmitting / receiving device 20 having a display 21 on which the values of the clamping force K or from it derived values are shown.
  • a use of a clamping tool which is characterized in that the transmitting / receiving device 20 wirelessly receives data from the clamping tool and displays this or data derived therefrom on a display 21, the transmitting / receiving device 20 being in particular a mobile terminal 20
  • several clamping tools transmit data to a common transmitting / receiving device 20 and the data or data derived therefrom are displayed on the display 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Clamps And Clips (AREA)

Abstract

L'invention concerne un outil de serrage doté d'un dispositif destiné à générer une position de serrage dans laquelle deux éléments de serrage (3, 4) appliquent une force de serrage à une pièce à travailler, dont la force antagoniste est prise par un élément de liaison (1) reliant les éléments de serrage (3, 4) l'un par rapport à l'autre, un élément se déformant sous l'effet de la force de serrage (K), et un élément capteur (5) convertissant la déformation de l'élément déformable en un signal électrique qui peut être utilisé pour déterminer la valeur de la force de serrage (K). Selon l'invention, l'élément déformable est formé par un élément de blocage (2) qui sert de bloc de poussée et au-dessus duquel l'un des éléments de serrage (4) est supporté sur l'élément de liaison (1) dans la position de serrage.
EP21700562.8A 2020-01-13 2021-01-13 Outil de serrage doté d'un capteur de force de serrage Active EP4090497B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020100582.2A DE102020100582A1 (de) 2020-01-13 2020-01-13 Spannwerkzeug mit Spannkraftsensor
PCT/EP2021/050566 WO2021144298A1 (fr) 2020-01-13 2021-01-13 Outil de serrage doté d'un capteur de force de serrage

Publications (3)

Publication Number Publication Date
EP4090497A1 true EP4090497A1 (fr) 2022-11-23
EP4090497C0 EP4090497C0 (fr) 2025-12-31
EP4090497B1 EP4090497B1 (fr) 2025-12-31

Family

ID=74186707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21700562.8A Active EP4090497B1 (fr) 2020-01-13 2021-01-13 Outil de serrage doté d'un capteur de force de serrage

Country Status (3)

Country Link
EP (1) EP4090497B1 (fr)
DE (1) DE102020100582A1 (fr)
WO (1) WO2021144298A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986007232A1 (fr) * 1985-05-28 1986-12-04 American Telephone & Telegraph Company Appareil de positionnement d'un panneau de circuit
US6758098B1 (en) 2002-02-20 2004-07-06 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Force-measuring clamp
IL162291A (en) 2004-06-01 2008-04-13 David Klein Clamp with clamp force sensor
CH697200A5 (de) * 2004-10-01 2008-06-25 Oerlikon Assembly Equipment Ag Klemmvorrichtung und Transportvorrichtung zum Transportieren von Substraten.
DE102006013108B4 (de) * 2006-03-22 2017-06-01 Wolfcraft Gmbh Spannwerkzeug, insbesondere Spannzwinge, Spannstock oder Spreizzwinge
DE202008000295U1 (de) 2008-01-02 2008-03-13 Hsieh, Chih-Ching Die sensorische Konstruktion eines Spannmittels
DE102013101479A1 (de) 2013-02-14 2014-08-28 Wolfcraft Gmbh Lösbare Blockiervorrichtung insbesondere an einem Spannwerkzeug

Also Published As

Publication number Publication date
EP4090497C0 (fr) 2025-12-31
DE102020100582A1 (de) 2021-07-15
WO2021144298A1 (fr) 2021-07-22
EP4090497B1 (fr) 2025-12-31

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