EP1632298B1 - Méthode et dispositif de fabrication d'un fil levier plié - Google Patents

Méthode et dispositif de fabrication d'un fil levier plié Download PDF

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Publication number
EP1632298B1
EP1632298B1 EP20050107173 EP05107173A EP1632298B1 EP 1632298 B1 EP1632298 B1 EP 1632298B1 EP 20050107173 EP20050107173 EP 20050107173 EP 05107173 A EP05107173 A EP 05107173A EP 1632298 B1 EP1632298 B1 EP 1632298B1
Authority
EP
European Patent Office
Prior art keywords
wire
bending
case
bending process
lever
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.)
Expired - Lifetime
Application number
EP20050107173
Other languages
German (de)
English (en)
Other versions
EP1632298A1 (fr
Inventor
Bernd Pauer
Daniela Sasse
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP1632298A1 publication Critical patent/EP1632298A1/fr
Application granted granted Critical
Publication of EP1632298B1 publication Critical patent/EP1632298B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire

Definitions

  • Devices according to the preamble of claim 6 are for example from the WO-A-96/21529 or the DE-C-19835521 known.
  • the invention relates to a method for producing a lever wire of a provided for arrangement in a fuel tank of a motor vehicle level sensor by a wire feed to a previously entered setpoint and a subsequent bending operation of the wire by a predetermined angle. Furthermore, the invention relates to a device for producing a bent lever wire of a provided for arrangement in a fuel tank of a motor vehicle level sensor with a feed device and with a bending device.
  • Level sensors for detecting a level of fuel in today's fuel tanks usually have a arranged on a support potentiometer, which detects the inclination angle of a lever wire mounted in the carrier.
  • the lever wire holds at its end facing away from the carrier a float following the fuel level.
  • the carrier usually has an angling as storage in the carrier and further bends, which allow unhindered pivoting of the lever wire in the most twisted fuel tanks.
  • the invention is based on the problem, a method of the type mentioned in such a way that a recalibration of the lever wire is avoided. Furthermore, a device for the simplest and most accurate manufacture of the lever wire to be created.
  • the first problem is solved according to the invention by a method according to claim 1.
  • the actual value is preferably determined after each individual bending operation or even before the bending process after the wire feed and compared with the intended target value. This allows early detection of a possible deviation in the bending of the lever wire and, if necessary, corrected. As a result, the manufacture of the lever wire is particularly simple and economical. A complex recalibration can be avoided thereby.
  • the detection of the measured value requires according to an advantageous development of the invention, a particularly low cost when the measured value is optically determined.
  • the method according to the invention makes it possible to produce a multiply bent lever wire if, after a first bending operation has taken place, a further wire feed and a further bending operation take place.
  • the measured value could, for example, be determined after each bending process at a new location on the lever wire.
  • the total tolerance between the two ends of the lever wire according to the invention can be kept particularly low if the measured value is determined in each case at the free end of the lever wire.
  • the lever wire according to another advantageous embodiment of the invention has a particularly high dimensional accuracy, if after a determination of a deviation above a predetermined tolerance in the setpoint / actual value comparison, a renewed bending process or a renewed wire feed takes place.
  • This design corrects each individual bend for a detected deviation.
  • individual tolerances are compensated in the bends of the lever wire, so that a tight overall tolerance of the finished bent lever wire can be maintained.
  • the tolerances of the lever wire depend very much on its material properties or the temperature prevailing during bending. After changing the material or changing the temperature, at least the second lever wire can be finished with a particularly small number of corrections if a correction value for the bending process is determined from the desired value and the deviation determined in the desired / actual value comparison and for the bending process of the following lever wire is stored.
  • each bending process can be detected in the manufacture of the lever wire and thus early adjust the bending device and / or the feed device so that the lever wire is bent as intended.
  • This allows a particularly close overall tolerance of the lever wire reach after production.
  • the device according to the invention therefore enables a particularly simple production of the lever wire.
  • tolerances of the bends can be easily compensated if the computing device is designed to calculate a correction value for actuating the feed device and / or the bending device.
  • the measuring point can be detected with particularly low constructional outlay if the monitoring device has at least one visual detection device which is longitudinally displaceable in provided spatial axes.
  • the monitoring device has at least one visual detection device which is longitudinally displaceable in provided spatial axes.
  • one detection device each is used on the three spatial axes.
  • a single detection device in the space axes provided for detecting the measuring point can be moved.
  • the inventive device designed according to another advantageous embodiment of the invention structurally particularly simple when the detection device or the detection devices is designed as a camera / are.
  • FIG. 1 shows a partially filled with fuel fuel tank 1 with a flange 3 used in a mounting opening 2.
  • a biased against the bottom of the fuel tank 1 swirl pot 4 is supported on the flange 3 from.
  • the swirl pot 4 holds a level sensor 5 with a lever wire 7 carrying a float 6.
  • the lever wire 7 has a bearing 8 in a carrier 9 fastened to the swirl pot 4.
  • the level sensor 5 has a potentiometer 10 for detecting the deflection of the lever wire 7.
  • the lever wire 7 has a plurality of bends 11. For assembly, the lever wire 7 is advanced with the float 6 through the mounting hole 2 in the fuel tank 1.
  • the bends 11 of the lever wire 7 allow the introduction of the level sensor 5 in particularly twisted fuel tank 1 and also the unimpeded movement of the float 6 over the entire height of the fuel tank. 1
  • FIG. 2 schematically shows a device for producing the lever wire 7 from FIG. 1 from a wire 12 wound on a roll.
  • the device has an electric feed device 13 and an electrical bending device 14.
  • the feed device 13 conveys the wire 12 into a measuring and bending space 19.
  • the feed device 13 stops the wire 12 and clamps it firmly.
  • the wire 12 from the bending device 14 bent.
  • a measuring point 15 is defined, which is detected by a monitoring device 16.
  • the monitoring device 16 has two detection devices 17 which can be displaced longitudinally in a spatial axis.
  • the detection devices 17 are each designed as a camera. Exemplary are in FIG. 2 two detection devices 17 for detecting the measuring point 15 shown in a plane.
  • the feed device 13, the bending device 14 and the monitoring device 16 are connected to a computing device 18, which controls the feed device 13 and the bending device 14 as a function of input setpoint values of the measuring point 15.
  • the measuring point 15 of the wire 12 can detect in a plane.
  • the monitoring device 16 may include a non-illustrated, third arranged perpendicular to the plane detection device and detect the measuring point 15 in the third spatial axis.
  • a monitoring device with a single, movable in the space axes provided camera can be used.
  • FIG. 3 shows the device for producing the lever wire 7 after a first bending operation with one of the bends 11 to be generated and a second control of the feed device 13 before the generation of the next, in FIG. 1
  • the detection devices 17 designed as cameras were moved in order to follow the measuring point 15 defined at the free end of the wire 12.
  • FIG. 4 shows a flowchart for the manufacture of the lever wire 7 FIG. 1 with the device from the FIGS. 2 and 3 ,
  • the computing device 18 controls the feed device 13 in a step S2, so that the clamping of the wire 12 is released, the wire 12 is moved into the measuring and bending space 19 up to the desired coordinate and then tightened.
  • the detection devices 17 of the monitoring device 16 detect the actual value of the measuring point 15 defined at the free end of the wire 12 in a visual measurement S3.
  • the deviation of the actual value from the desired value is detected in a further step S4 and the feed device is exceeded when an intended tolerance is exceeded 13 again controlled via a correction loop S5.
  • the first bending process S6 is started. After the first bending operation S6, the actual value of the measuring point 15 at the tip of the wire 12 is again determined in a visual measurement S7 with the monitoring device 16. After a comparison S8 of the actual value with the desired value, the bending process S6 is again carried out in a correction loop S9 with a calculated correction factor in the case of a deviation outside a prescribed tolerance. However, if the actual value lies within the tolerance, it is checked in a further step S10 whether the program for producing the lever wire 7 from the wire 12 has been completely carried out. Subsequently, either another feed and bending operation of the wire 12 or the finished bent lever wire 7 is output.
  • FIG. 5 shows a control loop of the method FIG. 4 for producing the lever wire 7 FIG. 1 ,
  • a reference variable W (t) of the intended target angle or the intended nominal length of the wire 12 during the feed or bending process S6 and with a controlled variable x (t) of the actual angle or the actual length of the advanced or bent wire 12.
  • the monitoring device 16 detects the actual angle or the actual wire length from the controlled variable and supplies this measured value to the computing device 18, in which a control difference E (t) is determined. From this control difference, a manipulated variable Y (t) for the bending process S6 or the feed is determined.
  • the manipulated variable Y (t) is thus a correction factor with which a faulty bent wire 12 can be bent.
  • the parameters with which the bending device 14 and the feed device 13 are actuated for the production of a following lever wire 7 can be corrected with the correction factor.
  • disturbances Z (t) act on the wire 12 during the bending operation S6, such as the internal stress of the material or the temperature, which influence the actual length produced or the actual angle of the finished bent wire 7.
  • the influence of these disturbances Z (t) on the bend 11 of the wire 12 are detected by means of the monitoring device 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Claims (9)

  1. Procédé pour la fabrication d'un levier en fil métallique comportant plusieurs coudes et faisant partie d'un capteur de niveau de remplissage prévu pour être mis en place dans le réservoir à carburant d'un véhicule automobile, ladite fabrication étant réalisée, dans chaque cas, par une avance du fil métallique jusqu'à une valeur de consigne réglée au préalable, suivie d'une opération de cintrage selon un angle donné, alors que, immédiatement après l'exécution de chaque opération de cintrage et/ou après l'exécution de l'avance du fil métallique, la valeur de mesure est détectée, puis la valeur effective et la valeur de consigne sont comparées et la valeur de mesure est déterminée dans chaque cas à l'extrémité libre du levier en fil métallique.
  2. Procédé selon la revendication 1, caractérisé par le fait que la valeur de mesure est déterminée par une méthode optique.
  3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que, après l'exécution d'une première opération de cintrage, on procède à une autre avance du fil métallique et à une autre opération de cintrage.
  4. Procédé selon l'une des revendications précédentes, caractérisé par le fait que, après avoir constaté une différence supérieure à une tolérance donnée lors de la comparaison entre la valeur de consigne et la valeur effective, on procède à un renouvellement de l'opération de cintrage ou à un renouvellement de l'avance du fil métallique.
  5. Procédé selon l'une des revendications précédentes, caractérisé par le fait que, à partir de la valeur de consigne et de la différence déterminée lors de la comparaison entre la valeur de consigne et la valeur effective, on détermine un facteur de correction pour l'opération de cintrage et ce facteur est mémorisé pour l'opération de cintrage du levier en fil métallique suivant.
  6. Dispositif pour la fabrication d'un levier en fil métallique comportant plusieurs coudes et faisant partie d'un capteur de niveau de remplissage prévu pour être mis en place dans le réservoir à carburant d'un véhicule automobile, ledit dispositif comprenant un système d'avance et un système de cintrage, caractérisé par un système de contrôle (16) permettant de détecter, dans chaque cas, une valeur effective à un point de mesure (15) après chaque opération de cintrage et/ou après chaque avance et par un système de calcul (18) destiné à comparer la valeur effective du point de mesure (15) à une valeur de consigne, le système de contrôle (16) étant configuré pour détecter chaque valeur effective à l'extrémité libre du levier en fil métallique.
  7. Dispositif selon la revendication 6, caractérisé par le fait que le système de calcul (18) est configuré pour calculer un facteur de correction permettant de commander le système d'avance (13) et/ou le système de cintrage (14).
  8. Dispositif selon la revendication 6 ou 7, caractérisé par le fait que le système de contrôle (16) comporte au moins un appareil détecteur (17) visuel pouvant se déplacer longitudinalement suivant des axes donnés.
  9. Dispositif selon l'une des revendications 6 à 8, caractérise par le fait que l'appareil détecteur (17) ou les appareils détecteurs (17) sont des caméras.
EP20050107173 2004-09-03 2005-08-04 Méthode et dispositif de fabrication d'un fil levier plié Expired - Lifetime EP1632298B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200410043174 DE102004043174A1 (de) 2004-09-03 2004-09-03 Verfahren und Vorrichtung zur Herstellung eines gebogenen Hebeldrahtes

Publications (2)

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EP1632298A1 EP1632298A1 (fr) 2006-03-08
EP1632298B1 true EP1632298B1 (fr) 2008-10-29

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EP20050107173 Expired - Lifetime EP1632298B1 (fr) 2004-09-03 2005-08-04 Méthode et dispositif de fabrication d'un fil levier plié

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EP (1) EP1632298B1 (fr)
DE (2) DE102004043174A1 (fr)
ES (1) ES2317150T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2914203B1 (fr) * 2007-04-02 2009-05-15 Jaubjaub Consulting Sarl Unite de cintrage d'un tube
DE102010014384A1 (de) * 2010-04-06 2011-10-06 Wafios Ag Richt- und Abschneidemaschine
US11027323B2 (en) * 2016-06-10 2021-06-08 Advanced Orthodontic Solutions Method and apparatus for auto-calibration of a wire bending machine

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3028834A1 (de) * 1980-07-30 1982-02-25 Adolf 8962 Pfronten Wünsch Verfahren und maschine zum automatischen stanzen und biegen von werkstuecken
DE3322777A1 (de) * 1983-06-24 1985-01-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Verfahren zum richtenden umformen, insbesondere biegerichten und/oder torsionsrichten, von werkstuecken
DE4109795A1 (de) * 1991-03-26 1992-10-01 Georg Burger Verfahren und einrichtung zum stanzen, biegen und/oder pressen
BR9103814A (pt) * 1991-08-30 1993-03-30 Brasil Compressores Sa Processo para dobramento de corpos plasticamente deformaveis
DE4137752A1 (de) * 1991-11-16 1993-05-19 Braun Federdraht Vertriebs Gmb Verfahren und vorrichtung zum beruehrungslosen messen von objekten
US5477715A (en) * 1992-04-08 1995-12-26 Reell Precision Manufacturing Corporation Adaptive spring winding device and method
DE4330783A1 (de) * 1993-09-10 1995-03-16 Otto Bihler Stelleinrichtung in einer Bearbeitungsmaschine
WO1996021529A1 (fr) * 1995-01-11 1996-07-18 British United Shoe Machinery Ltd. Systeme de definition de profil
DE19754521C2 (de) * 1997-12-09 2000-03-30 Mannesmann Vdo Ag Füllstandssensor
DE19835521C1 (de) * 1998-08-06 2000-02-17 Schuessler Technik Bernd Schue Verfahren zum Biegen von Draht
DE10304327A1 (de) * 2003-02-04 2004-08-19 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum Biegen schlanker Werkstücke

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Publication number Publication date
ES2317150T3 (es) 2009-04-16
EP1632298A1 (fr) 2006-03-08
DE102004043174A1 (de) 2006-03-09
DE502005005788D1 (de) 2008-12-11

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