EP1401593B1 - Verfahren zur einstellung der bahn einer abkantpresse - Google Patents

Verfahren zur einstellung der bahn einer abkantpresse Download PDF

Info

Publication number
EP1401593B1
EP1401593B1 EP02703430A EP02703430A EP1401593B1 EP 1401593 B1 EP1401593 B1 EP 1401593B1 EP 02703430 A EP02703430 A EP 02703430A EP 02703430 A EP02703430 A EP 02703430A EP 1401593 B1 EP1401593 B1 EP 1401593B1
Authority
EP
European Patent Office
Prior art keywords
punch
physical parameter
movement
piece
correction
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
EP02703430A
Other languages
English (en)
French (fr)
Other versions
EP1401593A1 (de
Inventor
Gerrit Gerritsen
Piero Papi
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.)
Bystronic Laser AG
Original Assignee
Bystronic Laser AG
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 Bystronic Laser AG filed Critical Bystronic Laser AG
Priority to DK02703430T priority Critical patent/DK1401593T3/da
Publication of EP1401593A1 publication Critical patent/EP1401593A1/de
Application granted granted Critical
Publication of EP1401593B1 publication Critical patent/EP1401593B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • the present invention relates to a method for adjusting the stroke of a press brake comprising a fixed apron carrying a die, a movable apron bearing a punch, means for moving the moving apron, said moving means resting on posts.
  • measuring rules for measuring the displacement (d) of the movable deck relative to the uprights at least one sensor measuring a physical parameter (p) varying according to the force exerted by said punch on a part of nominal thickness (e) to be bent at a set angle ⁇ c , placed on said die, and an electronic control device controlling the moving of the moving beam between a top dead center and a bottom dead center (BDC), provided with means of acquisition of the measurements of displacement (d) and of the physical parameter (p), and calculation means for correcting the value of said bottom dead center according to the measurements of said displacement (d) and udit physical parameter (p).
  • BDC bottom dead center
  • Applicant's patent CH 686119 describes a press brake of that type.
  • the force experienced by the amounts of a press under the effect of the thrust of the cylinders causes a bending of the amounts that can result in a deformation of the frame, up to 1-2 mm.
  • This flexion changes the penetration depth of the punch into the die, which creates an error in the bending angle obtained on the part to to fold.
  • control method determines, using pressure sensors, the force undergone by each of the amounts under the action means of Moving the moving deck, we compare each of the values obtained with a predetermined diagram establishing the relationship between the force suffered by the respective amount and the flexion of the amount, and the stroke of the slider is increased, in order to compensate for the deformations of the press.
  • the nominal thickness of the piece is one of parameters introduced into the control electronics of the press brake when setting the stroke.
  • the actual thickness e r of the sheet must be taken into account at each folding operation.
  • sheet steel manufacturers supply sheets whose actual thickness has variations of up to ⁇ 10% of the nominal value (e) of the thickness. If a sheet of 2 mm nominal thickness, for example, is to be bent at 90 ° in a 12 mm V-shaped opening, a variation of the thickness of 10% will induce, if not corrected, a variation of the folding angle of 2 °; without proper correction, the bending angle could vary between 88 ° and 92 °.
  • Patent application JP 02030327 proposes to determine the actual thickness of the piece to bend by detection concomitant with the increase of the hydraulic pressure by a first sensor and the position of the punch by a second sensor.
  • Patent Applications JP 051138254, JP 10052800 and JP 09136116 propose to determine the thickness of the piece to bend by detecting a variation in speed of descent from moving apron occurring at the moment the punch enters contact with this piece.
  • US Patent 4,550,586 proposes to determine the thickness the piece to be bent by detecting the loss of contact of this piece with sensors placed on the surface of the fixed deck, the loss of contact following the beginning of the process of folding.
  • US Pat. No. 4,408,471 proposes to record the variation of the force exerted by the punch on the workpiece as a function of its displacement, to deduce the modulus of elasticity of the workpiece from the slope of the workpiece. initial rectilinear portion of the force / displacement curve and, on the basis of a modeling of the behavior of the part in the zone of plastic deformation, to extrapolate from this curve the maximum point of displacement of the punch which will induce, after elastic return a folding angle having the set value ⁇ c .
  • This method has the advantage of taking into account the actual modulus of elasticity of the piece being bent.
  • the model to be used to calculate the maximum displacement of the punch is not the same.
  • the correctness of the correction of the bottom dead center therefore depends on the adequacy of the chosen model as an approximation of the behavior of the real part.
  • US Patent 4,511,976 discloses a method in which a electronic control device records the variation of the angle ⁇ between the sheet and the top of the matrix, measured by a position sensor which follows the deformation of the sheet, placed on the fixed deck, and the variation of the force punch support.
  • the initial linear part of the curve F / ⁇ calculates the modulus of elasticity of the sample and, by extrapolation of the curve in the deformation zone plastic, the controller calculates the maximum angle necessary to obtain the set value of the angle of folding in the absence of load.
  • the measurement of the angle ⁇ is imprecise and unreliable, the sensors commonly used for this type measurement gradually fading, and must be recalibrated for each matrix.
  • the object of the present invention is to propose a method of adjusting the stroke of a press brake which compensates for the springback effect of the piece, without present the disadvantages of previous methods.
  • This object is achieved by a method of the defined input type in which the difference in thickness between the actual thickness (e r ) of the workpiece and the nominal thickness (e) of the workpiece is calculated by comparing the actual position of the displacement of the punch at which a predetermined variation ⁇ p of the physical parameter (p) occurs with the theoretical position of said displacement where this variation ⁇ p should occur, in which the electronic control device processes the measurements of said displacement (d) and said parameter during the phase of plastic deformation of the part being folded, so as to compare them and to determine their deviations from the data recorded during a reference folding operation which made it possible to obtain the value of set point ⁇ c of the bending angle after releasing the force exerted by the punch and determining a reference value of the spring effect correction, and in wherein the electronic control device calculates a low dead center correction as a function of said reference correction of the spring effect and said deviations from the data of the reference record.
  • the comparison with the reference record is performed by calculating the instantaneous angle of folding ⁇ under load of the part, as a function of the variation of said displacement (d) following said variation ⁇ p of the parameter physical, taking into account said thickness difference (e r - e) and the geometrical parameters of the punch and the die.
  • the pressing force (F) of the punch on the workpiece is calculated by means of the value of the physical parameter (p), the succession of values of the instantaneous angle of folding / support force ( ⁇ , F) is acquired and compared to a reference curve ( ⁇ , F) ref pre-recorded during a reference folding operation that made it possible to obtain the set value ⁇ c of the folding angle after releasing the force exerted by the punch, and the electronic control device calculates a correction of the bottom dead center as a function of the difference between the pairs ( ⁇ , F) and the reference curve ( ⁇ , F) ref .
  • the method according to the invention avoids the use of unreliable angle measuring devices.
  • the process according to the invention avoids errors due to the use of models inappropriate theoretical.
  • the control device preferably performs a second correction of the bottom dead center taking into account the difference of thickness thus determined.
  • the speed of the movement movement is reduced to a speed Measurement acquisition (vam), less than the speed of pre-determined folding (VP), when the punch is at a predetermined distance from the theoretical pinch level of the sheet metal, this distance being greater than the tolerance of thickness ⁇ e of manufacture of said sheet, and the speed of movement movement increases again until said bending speed after detection of variation predetermined ⁇ p of said physical parameter (p).
  • vam speed Measurement acquisition
  • VP speed of pre-determined folding
  • the variation of the physical parameter (p) makes it possible to to determine the mechanical stresses to which the press, and therefore its deformation, and this on the basis of of data relating to the tool itself, stored in memory.
  • This measure of the constraints can be used to calculate a third correction, representative of the deformation of the press itself under the effect of these constraints.
  • the press brake shown in FIG. movable apron 1 supporting a punch 2 and a fixed apron 3 supporting a matrix 4.
  • Moving the moving deck is carried out using two hydraulic cylinders 5, 5 ', mounted on two respective uprights 6, 6 'integral with the apron inferior.
  • the machine is equipped with two measuring rules 9 and 9 ', mounted on each of its sides, in the fold axis, to measure the movement of the movable deck by compared to the respective amounts 6 and 6 '.
  • the folding movement is controlled by an electronic control device 7.
  • the control device electronics is arranged to process the signals a1 and a2 respectively from each of the pressure sensors and also treat two signals b1 and b2 from the rules of measure 9 and 9 'and representative of the movements of the apron mobile relative to each of the amounts 6 and 6 '.
  • the signals b1 and a1 separately the signals b2 and a2 on the other hand, in particular for to take into account possible defects of homogeneity of the piece to bending, and performing correction calculations and stroke compensations of the movable apron separately at the level the left amount and the right amount.
  • the skilled person will readily understand that the following description also illustrates well the calculations and race compensation for each of the two amounts taken separately, their respective signals subject of separate processing, that the calculations and compensations for signals averaged between the left amount and the right amount.
  • the bearing force is zero. It can be represented by the pressure (p) measured by the sensors 8, 8 ', which has an initial value that can be measured and zeroed by calculation.
  • the variation of the bearing force is linear during the elastic deformation of the sheet.
  • the slope of the linear part of the curve p / d or of the curve F / ⁇ derived from it by mathematical transformation makes it possible to calculate the modulus of elasticity.
  • the position of the moving deck to which corresponds the beginning of the variation of the physical parameter (p) makes it possible to calculate the actual thickness e r of the sheet. To determine this actual thickness more precisely, the descent of the deck can be controlled by the electronic control device according to a variant described below and illustrated by FIG.
  • FIG. 3 shows, on the same diagram, on the one hand the speed of descent V of the moving apron, which is preprogrammed, and, at the same time, the variation of the hydraulic pressure P measured at the level of the pressure sensors 8, 8 ', depending on the displacement (d).
  • the descent is carried out initially at a high approach speed V1, until a predetermined distance from the level where the punch theoretically pinches the sheet, said safety distance ds.
  • the speed is reduced, for example to a speed close to the folding speed VP, the latter being imposed by the composition and the nominal thickness of the sheet as well as by the characteristics of the desired folding, angle of Folding and tool profile.
  • This speed can typically be of the order of 10 mm / s.
  • the actual thickness e r of the sheet will be in the range e ⁇ ⁇ e.
  • the speed of descent is reduced to a measurement acquisition speed, vam, which is order of 1/2 to 1/10 of the folding speed VP, typically 1 mm / s - 5 mm / s.
  • the pressure sensors 8 and 8 ' measure the hydraulic pressure P at each of the jacks 5 and 5 'and the control device 7 records it and Trafficking.
  • the variation of the pressure is represented (in arbitrary units) in Figure 3.
  • the reduction of speed of descent of the moving deck, speed approach V1 at the folding speed VP, is accompanied by a slight concomitant pressure increase dp1, no significant with regard to folding.
  • a measuring cycle of the sensor + device control electronics lasts about 10 ms: in this way, while the deck goes down to a folding speed VP of the order of 10 mm / s, a measurement of the pressure is carried out every 0.1 mm; when the descent speed is reduced to a measurement acquisition speed vam of 1 mm / s, a measurement pressure is performed every 0.01 mm.
  • the device so is able to very accurately determine the when the pressure P increases again by an amount ⁇ p, representative of the contacting of the punch with the face top of the sheet.
  • ⁇ p representative of the contacting of the punch with the face top of the sheet.
  • the comparison of the entry level in contact with the level theoretical pinch determines the difference between thickness actual and nominal of the sheet and the control device 7 immediately recalculate a bottom dead center.
  • the descent of the apron mobile can be continued at the folding speed VP.
  • the pressure measured at the sensors 8, 8 After contact, the pressure measured at the sensors 8, 8 'increases almost linearly up to reach a PP value, bending pressure, which can to reach the order of magnitude of 300 bars; beyond is happening the plastic deformation of the part, the curve (d, P) curls down, then pressure P decreases slightly and linearly.
  • the value of the pressure in this phase of plastic deformation determines the deformation of the uprights and other fixed parts of the press.
  • the electronic device 7 compares the value of the pressure during the plastic deformation with an abacus specific to this press brake, recorded in memory, establishing the relationship between this value, the deformation of the fixed parts of the press and the penetration error of the punch that in result, in the absence of correction.
  • the punch stroke that is, the position of the bottom dead center (BDC) is corrected Consequently.
  • curve 10 becomes almost linear beyond its maximum curve area 11, 12.
  • the method of calculating the spring effect compensation is based on the comparison of the curve 10, representing the values ( ⁇ , F) calculated as the progress of the folding operation with a reference curve 20, representing the values ( ⁇ , F) ref stored in memory when a folding of a sheet of nominal thickness e and length L ref .
  • This reference curve 20, shown in dashed lines in FIG. 4, notably gives the maximum value of the instantaneous angle under load ( ⁇ ) max ref , having made it possible to obtain the setpoint value ( ⁇ ) c after the phase releasing the pressing force exerted by the punch on the workpiece, illustrated by the straight segment 21.
  • curves ( ⁇ , F) recorded during repetitive bends are substantially parallel to each other in the quasi-linear portion of the plastic deformation zone; in other words, they have a difference ⁇ f that varies practically not as a function of ⁇ between the points P 3 and P 4 .
  • the modulus of elasticity could also be determined from the slope between two points P1 and P2 of the part linear curve ( ⁇ , F) corresponding to the deformation elastic.
  • FIG. 4 also shows that if the curve 10 is extrapolated, its intersection with the line 21, representative of the spring effect, gives the bend angle ⁇ max under stress for the sample being bent which allows to obtain the set value ⁇ c in the absence of constraint.
  • ⁇ max is greater than ( ⁇ max ) ref if the folding curve is above the reference curve; ⁇ max is less than ( ⁇ max ) ref in the opposite case.
  • the measurements (p, d) are acquired, digitized and converted into pairs ( ⁇ , F) by the electronic control device (7).
  • the calculation of the correction of ( ⁇ max ) ref is carried out without graphical extrapolation: a plurality of values of F between the points P 3 and P 4 obtained as above are first corrected by a factor L / L ref . Then, the difference ⁇ f between the curve portion 10 situated between P 3 and P 4 and the curve 20 is determined from the values thus corrected by a least squares method. Then, the electronic control device calculates the corrected value of ⁇ max from ( ⁇ max ) ref and ⁇ f.
  • We can use the relation: ( ⁇ max ) ref - ⁇ max ⁇ f / tg ⁇
  • the angle ⁇ between the line 21 and the abscissa axis is obtained by recording the reference curve 20 and preprogrammed for the folding operation.
  • the electronic control device calculates the corrected value of the bottom dead point from the relationships indicated above between ⁇ , d and P.
  • this low dead center correction calculation is performed during folding, well before the punch approaches bottom dead center, based on measurements of pairs (p, d) made in a range. displacement, namely between points P 3 and P 4 , which is easy to determine.
  • the correction of the bottom dead center which compensates the deformation of the press is carried out simultaneously.
  • the correction that compensates for variations in the thickness of the part is already done at this time.
  • the reference curve can be obtained by means of a first folding test as shown in FIG. 5.
  • FIG. 5 represents the plastic deformation zone of the test intended to provide the reference values of the effect correction. of spring.
  • the folding represented by the curve 200 is conducted until reaching the set point of the folding angle ⁇ c , but under stress.
  • the punch is then slightly raised, so that the bending angle of the piece decreases under the effect of spring.
  • This process is represented by the segment 201 which intersects the abscissa axis at a point ⁇ 1.
  • the punch is then lowered so as to continue the bending of the part to a bending angle under stress ⁇ c + A.
  • the bearing force increases along the curve 202, first linearly, then along an arc of curve corresponding to the end of the plastic deformation. Then the punch is raised again and the support force decreases along the right segment 203; it is verified that the folding angle returns to the value ⁇ c in the absence of stress and that the segment 203 is parallel to the segment 201.
  • Figure 5 also shows a subsequent folding using data from the reference fold.
  • the corresponding ordinate B of the reference curve 200 is determined and the difference B 'between the ordinate of the point P 5 and the corresponding ordinate B of the reference curve.
  • the whole of the angular correction of spring effect applicable to the folding operation illustrated by the curve 100 is therefore A + A '.
  • the control electronics converts this value into a low dead center correction by means of the algebraic expressions indicated above.
  • the whole signal processing can be performed by comparing the pairs (d, p) with a curve (d, p) ref recorded during a first fold, that is to say a curve similar to the right half of the curve (d, P) of Figure 3, without operating the mathematical transformation (d, p) ⁇ ( ⁇ , F).
  • a curve (d, p) ref recorded during a first fold that is to say a curve similar to the right half of the curve (d, P) of Figure 3
  • the mathematical transformation (d, p) ⁇ ( ⁇ , F) if the reference curve is recorded on a first machine, and the following bends are made on another machine, this transformation is necessary to be able to make the comparisons and corrections described above.
  • the reference curve can be data stored in memory, obtained during a previous work.
  • the electronic control device searches in memory for the existence of a reference curve for identical bending parameters and material.
  • the research in memory relates in particular to the setpoint angle ⁇ c , the combination of tools and the physical parameters of the material (thickness, strength of the material).
  • a set of reference curves can constitute a database. This can be accessed online at a plurality of users, either in the form of a database of public access data, either as part of a private network.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Claims (9)

  1. Verfahren zur Regelung des Hubs einer Abkantpresse, umfassend eine bewegliche Wange (1), die einen Stempel (2) trägt, eine feste Wange (3), die eine Matrize (4) trägt, Mittel (5, 5') zur Bewegung der beweglichen Wange, wobei sich die Bewegungsmittel auf Pfosten (6, 6') stützen, die mit der festen Wange fest verbunden sind, Messlineale (9, 9') zur Messung der Bewegung (d) der beweglichen Wange in Bezug auf die Pfosten, mindestens einen Fühler (8, 8'), der einen physikalischen Parameter (p) misst, der in Abhängigkeit von der Kraft schwankt, die vom Stempel auf ein zu biegendes Werkstück ausgeübt wird, das auf der Matrize angeordnet ist, und eine elektronische Steuervorrichtung (7), welche die Bewegung der beweglichen Wange zwischen einem oberen Totpunkt und einem unteren Totpunkt (BDC) steuert und versehen ist mit Mitteln zur Erfassung der Messwerte der Bewegung (d) und des physikalischen Parameters (p) und mit Berechnungsmitteln zur Korrektur des Wertes des unteren Totpunkts in Abhängigkeit von den Messwerten der genannten Bewegung und des genannten physikalischen Parameters, dadurch gekennzeichnet, dass die Dickendifferenz zwischen der realen Dicke des Werkstücks und der Nenndicke (e) des Werkstücks berechnet wird, indem die reale Position der Bewegung des Stempels, in der es zu einer vorbestimmten Veränderung Δp des physikalischen Parameters (p) kommt, mit der theoretischen Position der genannten Bewegung verglichen wird, in der es zu dieser Veränderung Δp kommen sollte, dass die elektronische Steuervorrichtung die Messwerte der Bewegung (d) und des physikalischen Parameters (p) während der Phase der plastischen Verformung des gerade gebogenen Werkstücks verarbeitet, um sie zu vergleichen und ihre Abweichungen von den Daten zu bestimmen, die bei einem Referenzbiegevorgang aufgezeichnet wurden, der es ermöglichte, den Sollwert αc des Biegewinkels nach dem Aufheben der durch den Stempel ausgeübten Kraft zu erhalten und einen Referenzwert für die Korrektur der Federkraft zu bestimmen, und dass die elektronische Steuervorrichtung in Abhängigkeit von der Referenzkorrektur der Federkraft und den Abweichungen von den Daten der Referenzaufzeichnung eine Korrektur des unteren Totpunkts berechnet.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der momentane Biegewinkel α unter Belastung des Werkstücks in Abhängigkeit von der Veränderung der Bewegung d berechnet wird, indem die Dickendifferenz (er - e) und die geometrischen Parameter des Stempels und der Matrize berücksichtigt werden, dass der Auflagedruck (F) des Stempels auf dem Werkstück mit Hilfe des Werts des physikalischen Parameters (p) berechnet wird, dass die Aufeinanderfolge der Werte des Parameterpaares momentaner Biegewinkel / Auflagedruck (α, F) erfasst und mit einer Referenzkurve (α, F)ref verglichen wird, die bei einem Biegevorgang mit dem gleichen Material voraufgezeichnet wurde, der es ermöglichte, den Sollwert αc des Biegewinkels nach dem Aufheben der durch den Stempel ausgeübten Kraft zu erhalten, und dass die elektronische Steuervorrichtung (7) eine Korrektur (A') des maximalen Werts des momentanen Winkels unter Belastung (αmax)ref berechnet, der bei der Referenzbiegung bestimmt wurde, und zwar in Abhängigkeit von der Abweichung zwischen dem aus der Messung hervorgegangenen Paar (α, f) und der Referenzkurve (α, f)ref im Bereich der plastischen Verformung.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass die elektronische Steuervorrichtung (7) in Abhängigkeit von der Korrektur (A') des maximalen Werts des momentanen Winkels unter Belastung (αmax)ref eine Korrektur des unteren Totpunkts (BDC) berechnet.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die elektronische Steuervorrichtung 7 eine zweite Korrektur des unteren Totpunkts (BDC) berechnet, bei der die Dickendifferenz zwischen der realen Dicke des Werkstücks und der Nenndicke (e) des Werkstücks berücksichtigt wird.
  5. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass die Geschwindigkeit der Bewegung der beweglichen Wange auf eine Messwerterfassungsgeschwindigkeit (vam) reduziert wird, die kleiner ist als eine vorbestimmte Biegegeschwindigkeit (VP), wenn sich der Stempel in einer vorbestimmten Entfernung von der theoretischen Höhe des Einklemmens des Blechs befindet, die größer ist als die Dickentoleranz Δe für die Herstellung des Blechs, und dass die Bewegungsgeschwindigkeit nach dem Nachweis der vorbestimmten Änderung Δp des physikalischen Parameters (p) wieder bis auf die Biegegeschwindigkeit erhöht wird.
  6. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die elektronische Steuervorrichtung (7) die Messwerte des physikalischen Parameters (p) mit einer voraufgezeichneten Rechentafel vergleicht, welche die Beziehung zwischen dem genannten physikalischen Parameter und der Verformung der festen Teile der Presse herstellt, und eine dritte Korrektur des unteren Totpunkts (BDC) berechnet, indem sie die genannte Verformung berücksichtigt.
  7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der genannten physikalische Parameter die mechanische Beanspruchung ist, die ein Zylinder auf die bewegliche Wange ausübt und die in diesem Bereich durch einen Dehnungsmesser gemessen wird.
  8. Verfahren nach einem der Ansprüche 1 bis 6, eingesetzt in einer Abkantpresse, deren Bewegungsmittel zwei hydraulische Zylinder, die jeweils einem der Pfosten zugeordnet sind, und einen jedem Zylinder zugeordneten Druckfühler (8, 8') umfassen, dadurch gekennzeichnet, dass der physikalische Parameter der Mittelwert zwischen den hydraulischen Drücken ist, die durch die Fühler (8, 8') gemessen werden.
  9. Verfahren nach einem der Ansprüche 1 bis 6, eingesetzt in einer Abkantpresse, deren Bewegungsmittel zwei hydraulische Zylinder, die jeweils einem der Pfosten zugeordnet sind, und einen jedem Zylinder zugeordneten Druckfühler (8, 8') umfassen, dadurch gekennzeichnet, dass die Regelung des Hubs für jeden Pfosten unabhängig vom anderen ausgeführt wird und dass der physikalische Parameter der Druck ist, der jeweils von jedem der Fühler (8, 8') gemessen wird.
EP02703430A 2001-03-16 2002-03-15 Verfahren zur einstellung der bahn einer abkantpresse Expired - Lifetime EP1401593B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK02703430T DK1401593T3 (da) 2001-03-16 2002-03-15 Fremgangsmåde til regulering af en kantpresses slag

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH4902001 2001-03-16
CH4902001 2001-03-16
PCT/CH2002/000154 WO2002074463A1 (fr) 2001-03-16 2002-03-15 Procede de reglage de la course d'une presse-plieuse

Publications (2)

Publication Number Publication Date
EP1401593A1 EP1401593A1 (de) 2004-03-31
EP1401593B1 true EP1401593B1 (de) 2005-06-08

Family

ID=29783953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02703430A Expired - Lifetime EP1401593B1 (de) 2001-03-16 2002-03-15 Verfahren zur einstellung der bahn einer abkantpresse

Country Status (8)

Country Link
US (1) US7079919B2 (de)
EP (1) EP1401593B1 (de)
JP (1) JP4050619B2 (de)
CN (1) CN1286590C (de)
AT (1) ATE297272T1 (de)
DE (1) DE60204568T2 (de)
ES (1) ES2244749T3 (de)
WO (1) WO2002074463A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7607329B2 (en) 2005-03-17 2009-10-27 Siemens Aktiengesellschaft Method for free bending

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPR20040088A1 (it) * 2004-12-13 2005-03-13 Schiavi Macchine Ind Spa Metodo e dispositivo per la determinazione dello spessore o del ritorno elastico di un pezzo piegato con una pressa piegatrice.
JP4878806B2 (ja) * 2005-10-11 2012-02-15 株式会社アマダ ダイ金型，折曲げ加工方法及び装置
AT505743B1 (de) * 2007-03-30 2009-07-15 Trumpf Maschinen Austria Gmbh Verfahren zur festlegung eines einstellparameterwerts einer biegepresse
CN102445921A (zh) * 2010-09-30 2012-05-09 成都飞机工业（集团）有限责任公司 一种壁板多道次滚弯加载轨迹设计与数控代码生成方法
JP6103741B2 (ja) * 2012-05-11 2017-03-29 株式会社ホリカワ工業 金型及び折り曲げ加工方法
ITTV20120125A1 (it) 2012-07-06 2014-01-07 Gasparini Ind S R L Dispositivo per la bombatura in presse piegatrici.
JP6200274B2 (ja) 2012-10-23 2017-09-20 株式会社アマダホールディングス 加工機におけるパンチの最終デプス検出装置および最終デプス検出方法
AT512892B1 (de) * 2012-10-25 2013-12-15 Trumpf Maschinen Austria Gmbh Anordnung mit einer Biegepresse und einem Roboter sowie Verfahren zur Herstellung eines Biegeteils
CN103736775A (zh) * 2013-09-27 2014-04-23 广东工业大学 一种水火弯板成型数字胎架检测平台及方法
JP6243752B2 (ja) * 2014-02-25 2017-12-06 株式会社アマダホールディングス プレスブレーキ
CN104392053A (zh) * 2014-11-29 2015-03-04 江西洪都航空工业集团有限责任公司 一种蒙皮滚弯零件截面曲率分析方法
CN110198831B (zh) * 2017-02-06 2022-02-22 日本精工株式会社 框架构造、加工装置、部件的制造方法、滚动轴承的制造方法、车辆的制造方法、机械的制造方法以及冲压装置
CN111377598B (zh) * 2018-12-28 2023-08-04 扬明光学股份有限公司 模造镜片的制造设备及方法
EP3839676A1 (de) 2019-12-16 2021-06-23 Bystronic Laser AG Dickenausgleich in einem schneid- und biegeverfahren
CN113458489B (zh) * 2021-07-09 2022-05-27 浙江工贸职业技术学院 一种花键拉刀与圆孔拉刀的自动化校正装置及方法
CN114147109B (zh) * 2021-09-16 2022-07-05 深圳市明鑫工业材料有限公司 一种可自动控制调节的金属表面冲压加工工艺
CN113976680B (zh) * 2021-10-18 2024-03-29 芜湖银鹤机械制造有限公司 后挡板误差报警的数控折弯机监控系统

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4408471A (en) * 1980-10-29 1983-10-11 Massachusetts Institute Of Technology Press brake having spring-back compensating adaptive control
US4511976A (en) * 1982-07-06 1985-04-16 Cincinnati Incorporated Press brake having spring back compensation stroke reversal control
CH651767A5 (fr) * 1982-11-05 1985-10-15 Cybelec Sa Procede de pliage d'une tole a l'aide d'une presse plieuse.
US4819467A (en) * 1986-09-17 1989-04-11 Cincinnati Incorporated Adaptive control system for hydraulic press brake
JPH0230327A (ja) * 1988-07-15 1990-01-31 Matsushita Electric Works Ltd プレスブレーキのストローク制御装置
JPH0729223B2 (ja) * 1991-06-28 1995-04-05 アイダエンジニアリング株式会社 プレス機械の下死点位置補正装置
CH686119A5 (fr) * 1991-10-31 1996-01-15 Beyeler Raskin Sa Procede de reglage de la course du coulisseau d'une presse-plieuse et presse-plieuse comportant un dispositif de reglage pour la mise en oeuvre du procede.
JP3385039B2 (ja) 1991-11-20 2003-03-10 株式会社アマダ ベンダーにおける板厚測定方法及び測定装置
JP2752898B2 (ja) * 1993-06-16 1998-05-18 株式会社小松製作所 Ｖ曲げ加工におけるスプリングバック角度計測装置
JP2900012B2 (ja) * 1993-08-23 1999-06-02 アイダエンジニアリング株式会社 プレスのスライド下死点位置補正装置
JP3363970B2 (ja) * 1993-10-15 2003-01-08 株式会社小松製作所 プレスブレーキのラム位置設定方法およびラム制御装置
JP3720099B2 (ja) 1995-11-10 2005-11-24 株式会社アマダ 曲げ加工機における板厚検出方法およびその装置並びに曲げ加工方法および曲げ加工機
JPH1052800A (ja) 1996-08-08 1998-02-24 Daikin Ind Ltd プレス加工機の制御装置
DE19782030T1 (de) * 1996-10-03 1999-08-12 Komatsu Mfg Co Ltd Biegeverfahren und Biegevorrichtung für eine Biegemaschine
EP1120176B1 (de) * 2000-01-24 2005-04-20 Bystronic Laser AG Verfahren zum Steuern des Hubes einer Biegepresse
WO2001060541A1 (fr) * 2000-02-18 2001-08-23 Amada Company, Limited Procede et dispositif de detection de l'epaisseur d'une plaque sous presse
AT411164B (de) * 2000-08-16 2003-10-27 Trumpf Maschinen Austria Gmbh Verfahren zum betrieb einer biegepresse und biegepresse, insbesondere abkantpresse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7607329B2 (en) 2005-03-17 2009-10-27 Siemens Aktiengesellschaft Method for free bending

Also Published As

Publication number Publication date
DE60204568T2 (de) 2006-05-24
JP2004520939A (ja) 2004-07-15
CN1286590C (zh) 2006-11-29
JP4050619B2 (ja) 2008-02-20
US20040111177A1 (en) 2004-06-10
DE60204568D1 (de) 2005-07-14
EP1401593A1 (de) 2004-03-31
ES2244749T3 (es) 2005-12-16
US7079919B2 (en) 2006-07-18
CN1496289A (zh) 2004-05-12
WO2002074463A1 (fr) 2002-09-26
ATE297272T1 (de) 2005-06-15

Similar Documents

Publication Publication Date Title
EP1401593B1 (de) Verfahren zur einstellung der bahn einer abkantpresse
EP1452302B1 (de) Verfahren zur Korrigierung eines Biegvorgangs und Biegepresse
EP1120176B1 (de) Verfahren zum Steuern des Hubes einer Biegepresse
FR2627119A1 (fr) Procedes de detection d'usinabilite et de coupe
FR2661987A1 (fr) Procede de mesure de la pression intracranienne et dispositif a utiliser dans ce but.
FR2534022A1 (fr) Procede de production d'un element sensible a une contrainte, dispositif pour convertir un mouvement mecanique en signaux electriques et transducteur
EP1981394A1 (de) Vorrichtung zum messen des winkels zwischen weitsicht und kurzsicht bei einem brillenpatienten
FR2654369A1 (fr) Procede et appareil de detection des angles de cintrage de feuilles metalliques et procede de cintrage.
FR2890305A1 (fr) Un procede et un dispositif pour fournir une mesure de la pression intraoculaire.
WO2001003863A1 (fr) Presse plieuse a precision amelioree
KR20110058897A (ko) 롤 스탠드에서 상호 작용하는 2개의 작업 롤을 보정하기 위한 보정 방법
EP0540476A1 (de) Verfahren zum Steuern des Stösselhubes einer Abkantpresse und Abkantpresse mit einer Steuervorrichtung zum Durchführen des Verfahrens
JP2004520939A5 (de)
EP1320000B1 (de) Verfahren zur Kalibrierung eines Messgerätes
JPH025489B2 (de)
CH667532A5 (fr) Dispositif pour mesurer la force de decoupage et limiter les surcharges dans une presse a platines.
FR2890304A1 (fr) Un dispositif pour mesurer la resistance a la deformation d'une cornee.
BE1014933A3 (fr) Dispositif integrateur pour detecter et recuperer la deformation des epaules, dans une machine a presser et a plier.
EP1345712B1 (de) Verfahren zur echtzeiteinstellung einer richtmaschine
EP1725352B1 (de) Rollenrichtmaschine mit variablem achsenabstand
FR2502033A1 (fr) Procede et dispositif pour le faconnage de pieces telles que dentures, axes, portees cylindriques ou analogues
EP1652593B1 (de) Verfahren zum Richten von gewaltzten Metallprofilen
WO2023025893A1 (fr) Contrôle d'impression 3d
FR2672997A1 (fr) Procede de mesure non destructive en ligne d'une caracteristique d'un produit fabrique en continu, et dispositif associe.
FR2601603A1 (fr) Procede de pliage auto-adaptatif.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030910

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050608

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050608

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050608

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 60204568

Country of ref document: DE

Date of ref document: 20050714

Kind code of ref document: P

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: ABREMA AGENCE BREVETS ET MARQUES GANGUILLET & HUMP

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20050810

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050908

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051108

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2244749

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060331

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060331

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20060309

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20080318

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050608

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20080317

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20090331

Year of fee payment: 8

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20091130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090331

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091123

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20101001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101001

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: ROSENICH PAUL; GISLER CHRISTIAN PATENTBUERO PAUL R

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 60204568

Country of ref document: DE

Representative=s name: PATENTBUERO PAUL ROSENICH AG, LI

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20180420

Year of fee payment: 17

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20200727

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: NEW ADDRESS: ROTENBODENSTRASSE 12, 9497 TRIESENBERG (LI)

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190316

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20210317

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20210225

Year of fee payment: 20

Ref country code: DE

Payment date: 20210302

Year of fee payment: 20

Ref country code: BE

Payment date: 20210217

Year of fee payment: 20

Ref country code: SE

Payment date: 20210311

Year of fee payment: 20

Ref country code: GB

Payment date: 20210308

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20210211

Year of fee payment: 20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

Ref country code: DE

Ref legal event code: R071

Ref document number: 60204568

Country of ref document: DE

REG Reference to a national code

Ref country code: BE

Ref legal event code: MK

Effective date: 20220315

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20220314

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20220314

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK07

Ref document number: 297272

Country of ref document: AT

Kind code of ref document: T

Effective date: 20220315