WO2012130596A2 - Procédé de fabrication d'une pièce pliée et plieuse pour la mise en œuvre du procédé - Google Patents

Procédé de fabrication d'une pièce pliée et plieuse pour la mise en œuvre du procédé Download PDF

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Publication number
WO2012130596A2
WO2012130596A2 PCT/EP2012/054196 EP2012054196W WO2012130596A2 WO 2012130596 A2 WO2012130596 A2 WO 2012130596A2 EP 2012054196 W EP2012054196 W EP 2012054196W WO 2012130596 A2 WO2012130596 A2 WO 2012130596A2
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WO
WIPO (PCT)
Prior art keywords
bending
angle
workpiece
arm
end portion
Prior art date
Application number
PCT/EP2012/054196
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German (de)
English (en)
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WO2012130596A3 (fr
Inventor
Jürgen Wolf
Original Assignee
Wafios 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 Wafios Ag filed Critical Wafios Ag
Publication of WO2012130596A2 publication Critical patent/WO2012130596A2/fr
Publication of WO2012130596A3 publication Critical patent/WO2012130596A3/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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/14—Bending rods, profiles, or tubes combined with measuring of bends or lengths
    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member

Definitions

  • the invention relates to a method for producing a bent part according to the preamble of claim 1 and to a bending machine arranged for carrying out the method according to the preamble of claim 9.
  • Preferred field of application is the bending of pipes.
  • the movements of machine axes of a bending machine are controlled by means of a control device coordinated to the workpiece, such as a wire, a pipe, a pipe or a rod, by plastic Forming one or more lasting bends.
  • the workpiece is reshaped by means of a bending machine having a bending head with a bending arm having means for engaging an end portion of the workpiece and being rotatable about a bending axis by means of a bending drive controlled by a controller.
  • the means for engaging may be, for example, a bending pin which is applied to the end portion for bending on one side becomes. Bending pins are used, for example, for wire bending.
  • the means for engaging may also be a tensioning device for clamping the end portion. Such clamping devices are often used when bending pipes by means of rotary draw bending.
  • a section of the workpiece to be reshaped is first brought into a starting position in the engagement region of the bending head. If prefabricated, ready-cut individual workpieces are to be bent, they can be inserted into the bending machine for this purpose. It is also possible to move from a longer workpiece supply a piece of suitable length by a Zubuchroperation in the starting position. Thereafter, the means for engaging is brought into contact with the end portion. This may vary depending on the construction of the machine, e.g. by applying a bending pin to the end portion on one side or by clamping the end portion by means of a tensioning device, e.g. the end portion between a clamping jaw of the clamping device and a bending mold is fixed.
  • a tensioning device e.g. the end portion between a clamping jaw of the clamping device and a bending mold is fixed.
  • the outer contour of the bending mold can stabilize the inner contour of the bend and specify their radius exactly.
  • a bending operation without bending form is also possible. Thereafter, in a bending operation, by bending the bending arm about the bending axis, bending is generated between a feed side portion of the workpiece and the end portion.
  • the relative orientation of the end portion to the feed side portion is commonly described by the "bend angle.” For the purposes of this application, this is defined as the angle that a plane normal to the neutral fiber of the feed side portion has with a plane normal to the neutral fiber of the end portion
  • the bending angle is the angle between the extended center axes of the feed side portion and the end portion. In the idealized case, the magnitude of the bending angle corresponds to the angle of rotation which the bending arm travels to produce the desired bend.
  • the bent end portion springs back after a bending process due to the elastic plastic material behavior by a certain angular amount, which is usually referred to as springback angle.
  • the springback is usually compensated by the fact that the workpiece is over-bent during the bending operation beyond the desired bending angle desired for the finished bent part. Attempts are made to control the extent of overbending, which can be described by the overbending angle, so that the desired setpoint bending angle is present after springback.
  • a bending operation is usually carried out in order to achieve the actual bending angle (actual bending angle) sufficiently close to the desired target bending angle. Approximate bending angle. Precision requirements for the desired bending angle are in some cases less than a tenth of a degree.
  • EP 0 384 477 B1 describes a pipe bending machine with a measuring device for determining the springback and the post bending angle after releasing a non-bent pipe leg.
  • the tube is thereby inserted into the machine, fixed by means of a clamping device on the bending tool whose initial orientation is determined and that after bending the tube by a desired angle is rotated back until the non-bent tube leg has assumed its initial orientation without force.
  • the associated angle by which the bending tool has been turned back is measured and the tube is bent by this angle.
  • the measuring device has a pivotable sensing arm, which is brought to rest on the non-bent tube leg, and a non-rotatably connected to the probe arm pointer. The sensing arm and the pointer are rotatable about an axis parallel to the bending axis.
  • the utility model DE 297 1 8 648 U 1 describes a bending machine for bending a pipe, which has a bending tool pivotable about a bending axis with a clamping device for holding the pipe leg to be bent and a holder having an abutment for supporting the supply side to be bent Having tubular leg adjoining pipe section.
  • the bending machine is equipped with a measuring device for determining the springback of the pipe section after bending.
  • the clamping device is formed with an opening path for releasing the bent pipe leg by at least the springback of the bent pipe leg while holding and maintaining the position of the other pipe section.
  • the measuring device has a be attached to the bent or bent pipe section sensor for transmitting the pivotal position about the bending axis on the one hand of the clamped and on the other hand released from the clamping device tube leg.
  • the measuring device has a Drehweggeber, which is connected on the one hand with the bending tool and on the other hand with the attachable to the pipe section sensor.
  • EP 0 928 647 A2 describes a tube bending machine with a tactile measuring device for measuring the actual bending angle actually produced by the bending process.
  • DE 10 2009 003 950 A1 (corresponding to US Pat. No.
  • 7,584,637 describes a method for bending a metal object and a bending machine suitable therefor, which has a measuring device which serves to measure actual bending coordinates of the bent metal objects. Based on the measurement, a subsequent bending process can be controlled.
  • a measuring device a camera is provided in one embodiment.
  • EP 1 916 498 B1 describes further methods for measuring and / or correcting the workpiece shape after deformation by bending.
  • the invention provides a method having the features of claim 1 and a bending machine having the features of claim 9.
  • Advantageous developments are specified in the dependent claims. The wording of all claims is incorporated herein by reference.
  • the bending arm is brought into a measuring position in which an element of the bending arm is in contact (contact with contact) with the end portion.
  • An encoder signal which represents the rotational position of the bending arm in the measuring position, is processed to determine the actual bending angle.
  • encoder signal in this case denotes the signal of a sensor for detecting the position (absolute encoder) or position change (incremental encoder) of a machine element
  • the machine element may be the bending arm itself or a machine element coupled to the bending arm If necessary, the position or change in position of a linearly displaceable machine element can also be detected and evaluated by a displacement sensor.
  • the bending arm is thus used as part of a measuring device for determining the actual bending angle. Since the bending arm for the measurement in contact with the bent end portion, a measuring method is realized in which the rotational position of the bending arm is detected by at least one encoder. On a separate measuring device, e.g. with a separate button or with camera or the like, can therefore be dispensed with.
  • the bending drive coupled to the bending arm has a rotary encoder connected to the control device, and a transmitter signal of this rotary encoder is processed to determine the actual bending angle.
  • This variant can be used numerically controlled bending machines, in which at least the machine axis is equipped for pivoting the bending arm as a controlled machine axis with a rotary encoder for feeding back the actual angle of rotation, be realized without additional design effort as a pure software solution.
  • the rotary encoder with which the rotational position of the bending arm is detected in the measuring position, does not necessarily have to be integrated into the bending drive. Rather, a separate from the bending drive encoder may be provided which is mounted at a suitable location to detect the rotational position of a slip-coupled to the slip-free element of the drive train for the bending arm.
  • the element of the bending arm which in the measuring position is in contact with the end section, is preferably formed by an element of the clamping device, in particular by a clamping jaw, with which the end section is pressed against a bending mold during the bending operation.
  • the element may also be formed by a separate element from the clamping device.
  • a bending pin may be the element that is in contact with the end portion in the measuring position.
  • the means for engaging the end portion eg, tensioning means or bending pin
  • the means for engaging the end portion remains engaged with the clamped end portion after the end of the bending operation, and the bending drive is released to determine the actual bending angle such that the bending arm moves through the relaxing portion Workpiece is rotated in the measuring position.
  • release here describes in particular a situation in which the machine-applied torques on the bending arm are smaller than the moments applied by the relaxing workpiece in that the self-locking of drive, gearbox and the like or other influences such as gravity are neutralized in the direction of springback
  • the bending arm can be brought into a floating position in which it can follow the movement of the end section without impairing this movement.
  • the end portion In the bending operation, the end portion is first bent over by a bending moment relative to the feed side portion relative to a target bending angle in a bending direction by an overbending angle. This should compensate for the inevitable springback partially or completely. After this overbending, the "release" of the bending axis, if any, may immediately follow in combination with a controlled return to the relaxed state.
  • a measurement of the actual bending angle can be made immediately after completion of the release, ie when the effected by the under tension bending part backward movement against the original bending direction completed and the bending arm is at rest. As a result, the actual return curve can be determined easily.
  • the procedure is such that, after the bending arm has been bent over by the bending drive, it is turned back counter to the first bending direction until a counter-torque opposing the (original) bending moment is applied to the bending arm, so that the end portion acts in the original bending direction on the bending arm exercises.
  • This process is also referred to in this application as "retracting.”
  • the workpiece is first actively bent back beyond its fully relaxed position, after which the bending arm can be rotated through the relaxing workpiece in the original bending direction into the measuring position It has been shown that frequently even more accurate measurement results can be achieved.
  • the process step of the "free travel" or the active bending back may also be useful in other methods, regardless of the other features of the bending operation and the determination of the actual bending angle.
  • a measurement situation is sought in which the deformed workpiece is loaded as little as possible by external forces, so that the relative orientation between end section and feed side section can be determined on the force-free workpiece.
  • a slide rail device is used, which serves as an abutment in preferred bending machines for guiding the feed side section during the bending operation.
  • the slide rail device is first relieved after the end of the bending operation (before the determination of the actual bending angle) and then pressed back to the feed side section for fixing the feed side section for the determination of the actual bending angle.
  • the workpiece can fully relax. If the slide rail device is then pressed against the feed side section again, its position with respect to the machine-fixed coordinate system is precisely defined. Since the rotational position of the bending arm is related to the machine-fixed coordinate system, can thus be done by determining the rotational position of the bending arm in the measuring position an exact determination of the actual bending angle. For the fixation of the feed side portion in the determination of the actual bending angle, it is not necessary to press the slide rail means with the force to the feed side portion, which is applied during the bending operation.
  • the invention also relates to a bending machine for producing a bent part from an elongated workpiece, in particular from a tube, wherein the bending machine has a bending head with a bending arm, which has means for engaging an end portion of the workpiece and controlled by a control device Bending drive is rotatable about a bending axis.
  • the bending machine is configured to perform the procedure.
  • a further aspect of the present invention relates to a computer program product, which is stored in particular on a computer-readable medium or implemented as a signal, wherein the computer program product, when loaded into the memory of a suitable computer and executed by a computer, causes the computer or a machine controlled by the computer to perform a method according to the invention or a preferred embodiment thereof.
  • Fig. 1 shows a schematic representation of a plan view of the bending head of a single-head bending machine for bending pipes by Rotationszugbiegen;
  • Fig. 2 shows the bending head of Figure 1 after clamping the tube before the start of the first bending movement.
  • Fig. 3 shows the bending head of Figure 1 at the end of a first bending movement (overbending).
  • FIG. 4 shows the bending head of FIG. 1 at the end of one opposite to FIG first bending movement directed return motion with active
  • Fig. 5 shows the bending head of Fig. 1 after releasing the bending drive and spring back into the measuring position of the bending arm.
  • FIG. 1 shows a schematic representation of a plan view of the bending head 1 00 of a single-head bending machine. It is designed as a tube bending machine to provide an elongate workpiece 1 1 0 in the form of a tube with a round cross-section by cold forming with one or more bends.
  • the bending machine has a rectangular machine coordinate system MK, identified by lowercase letters x, y and z, with a vertical z-axis and horizontal x and y axes.
  • the x-axis is parallel to the workpiece axis 1 12 of the still unbent workpiece.
  • the later-described, regulated-driven machine axes each designated by capital letters (e.g., C, V, L, P, and Y).
  • an initially straight workpiece section is brought into the initial position shown in the engagement region of the bending head 1 00.
  • the workpiece is often already in cut-to-size form as a prefabricated workpiece prior to bending and is inserted manually or mechanically into the bending machine.
  • With thinner cross sections is often of a longer Workpiece supply (coil) worked, and there is a separate (not shown) supply means is provided, with which a work piece to be formed is conveyed parallel to a feed direction or feed direction to the starting position.
  • the machine axis for the feed is called C-axis, it has a motor MC.
  • the bending head has a bending arm 120 that is rotatable relative to the machine frame about a bending axis 125 extending parallel to the z-axis of the machine coordinate system.
  • the associated machine axis is referred to herein as Y-axis and includes a bending drive MY in the form of an electric servo motor. This is coupled via a drive train slip-free with the bending arm 120.
  • the bending arm includes a clamping device 130 which is pivotable with this and serves as means for engaging the end portion to clamp an end portion 1 15 of the workpiece for the bending operation.
  • the clamping device includes a on the bending arm perpendicular to the workpiece longitudinal direction linearly movable clamping jaw 1 35, which has on the side facing the workpiece a concave cylindrical receiving contour for application to the cylindrical end portion.
  • the associated machine axis is referred to as P-axis and has as its drive an electric motor MP, which rotates a ball screw.
  • This spindle carries a spindle nut, which carries the balls and moves with rotation of the spindle in the longitudinal direction.
  • the spindle nut is attached to a linearly movable carriage, which carries the jaw.
  • the jaw When clamped, the jaw, which is moved toward the workpiece, presses the workpiece against a concave cylindrical contoured straight portion 142 (clamping region) of a bending mold 140 which is rotatable coaxially with the bending arm about the bending axis 125 and then rounds the clamping region over a large portion of its circumference is.
  • the bending mold can be firmly connected to the bending arm.
  • a separate from the bending drive drive is provided for the bending mold to change the rotational position of the bending mold relative to the rotational position of the bending arm. Due to the outer contour of the bending mold, the inner contour of the bent workpiece is predetermined and stabilized in the region of the generated bend.
  • a slide rail device In order to stabilize the feed side section 11 of the workpiece 110 during the bending operation, a slide rail device is provided with a slide rail element 150 which does not move with the bending arm during the bending operation.
  • the slide rail device has two linear machine axes, namely the V-axis and the L-axis with associated electromotive drives MV and ML.
  • the L-axis causes a horizontal translation of the slide rail element 150 parallel to the x-axis of the machine coordinate system or parallel to the feed direction, the V-axis a horizontal linear motion perpendicular thereto and parallel to the y-axis.
  • a concave cylindrical receiving contour is provided which on the feed side of the slide rail element surrounds the feed side section 1 18 half-sidedly and stabilizes it over a relatively long length.
  • the linear movement parallel to the axial direction of the feed side section (L-axis) is used in the bending process.
  • All drives for the machine axes are electrically connected to a control device 180, including the Power supply for the drives, a central processing unit and storage units contains. With the aid of the control software active in the control software, the movements of all machine axes are variably controlled to produce a coordinated movement of the elements involved in the bending process.
  • a display and control unit 190 connected to the control device serves as an interface to the machine operator.
  • the motors for linear movements may each be servomotors or electric linear drives (direct drives), for the rotary motion servo drives or servomotors are provided, which are also known as direct drives, e.g. can be designed as torque motors.
  • Some or all of the machine axes may be designed as controlled machine axes and contain a corresponding encoder (rotary encoder, position sensor), which is connected to the control device and the actually reached by control position feedback to the control device.
  • the encoder 128 of the bending drive MY connected to the control device 180 is shown schematically. He can directly detect the rotational position of the shaft of the servo motor or the rotational position of a coupled with this shaft slip-free rotary element of the drive train for the bending arm.
  • the bending operation begins with the bending drive Y being activated to pivot the bending arm 120 and the bending die 140 in a first bending movement about the bending axis 125 in the bending direction 127.
  • the bending drive Y being activated to pivot the bending arm 120 and the bending die 140 in a first bending movement about the bending axis 125 in the bending direction 127.
  • a bend 1 17 generated whose center of curvature lies at the bending axis 125 and the inner contour is determined by the outer contour of the bending mold.
  • the feed side section is pulled parallel to the x axis in the direction of the bending head.
  • This feeding movement is assisted by simultaneous activation of the L-axis, which shifts the slide rail element 1 50 of the slide rail device parallel to the x-axis or to the feed direction with the movement speed of the feed side section. This retains its straight shape.
  • the workpiece feed (C axis) is also activated.
  • a bend with a bending angle of 90 ° (target bending angle) is to be generated on the workpiece.
  • the bending angle BW is defined as that angle which a vertical plane 1 1 8E perpendicular to the neutral fiber of the feed side section 1 1 8 includes with a plane perpendicular to the neutral fiber of the end portion 1 15 level 1 15E.
  • the workpiece is initially bent over an overbending angle UW, wherein the overbending angle is defined here as the difference angle between the desired bending angle and the bending angle achieved during overbending.
  • the first angle of rotation of the bending arm between the initial position with unbent workpiece (FIG. 2) and the rotational position during overbending (FIG. 3) is approximately 95 ° and, accordingly, the overbend angle is approximately 5 °.
  • the amount of overbending, d. H. the overbend angle or the first rotation angle can be calculated workpiece-specific via the software, e.g. based on workpiece parameters such as wall thickness, diameter and modulus of elasticity.
  • a characteristic curve can be recorded or stored, indicating the relationship between the desired bending angle on the workpiece (target bending angle) and the necessary for its generation, to be driven by the bending axis first rotation angle.
  • the characteristic curve can first be determined on the basis of workpiece parameters and then manually adjusted by the user if necessary. Alternatively, the overbending angle can also be determined iteratively.
  • an automatic adjustment (correction) of the characteristic curve is made if the result of the measurement shows that the first rotation angle determined on the basis of the current characteristic curve does not lead to the desired setpoint bending angle with sufficient accuracy, ie if the difference between the measured actual value Bending angle and the desired bending angle exceeds a predefinable limit.
  • the bending arm 120 and the bending mold 140 are synchronously pivoted back against the bending direction 127 of the first bending movement by means of the bending drive MY in an opposite direction 123 until a bending moment opposite to the original bending moment is applied to the bending drive or the bending arm.
  • the slide rail 35 and the workpiece 110 are also retracted at the same time.At the end of this free movement, the bending angle currently present on the clamped workpiece is smaller than the desired bending angle covered, which is greater than the overbend angle.
  • the bent part ie the workpiece 100
  • This active bending back of the workpiece a better state of stress can be achieved in the workpiece after the end of the bending operation, so that this retains its shape even over a long time.
  • the backward bending or bending back stresses the workpiece predominantly in the elastic range, but it can also be produced small amount of plastic deformation.
  • Bending and subsequent counterbending in the plastic area are performed by overbending and subsequent "artificial aging" bending, the effects being similar to straightening in that the resulting stress state is better preserved than without this additional plastic deformation During straightening, alternating positive and negative bending moments are generated, which stabilize the shape of the bending part.
  • all drives except the drive for the P-axis (jaw drive) de-energized so that in particular the lateral Andgurterrorism of the slide rail member 150 is lifted to the supply-side section 1 1 8.
  • the slide is pressed again with the help of the V-axis to the feed side section, but only with about 1 0% of the force present in the first bending process. As a result, the feed-side section is fixed for the subsequent measurement of the actually achieved bending angle (actual bending angle).
  • the bending drive MY can either be de-energized or supplied with power in such a way that the self-locking in the bending drive and in possible transmission elements and other influences in the direction of springback are neutralized (floating position). Since now the feed side section 1 18 is set in its orientation and the unbent end portion 1 15 is indeed clamped in the clamping device, but is released with respect to rotation about the bending axis, the workpiece relaxes, springs back and rotates the bending arm 120 and the so coupled bending drive MY in the original bending direction 127 with. The spring back in the original bending direction 127 is shown schematically in Fig. 5.
  • the actual actual bending angle is applied to the workpiece.
  • the associated rotational position of the bending drive can be read out directly from the encoder signal of the rotary encoder 128 by the control device 1 80.
  • the bending arm itself is used as part of a measuring device for determining the actual bending angle.
  • This method variant for measuring the actual bending angle is completely without separate measuring devices, such as buttons, cameras or the like, since only already existing in the bending machine elements, such as the encoder 128, are used.
  • the actual bending angle agrees after the return already sufficiently accurate with the target bending angle. If there is too great a deviation between the desired bending angle and the actual bending angle, a bending process is initiated.
  • the tensioning device remains in engagement with the end portion and the bending arm is moved by the bending drive by a certain Nachbiegewinkel in a suitable Nachbie subung.
  • a special process variant is used for the determination of the size of the Nachbiegevorgangs, ie for the determination of the extent and direction of the pivotal movement of the bending arm during postbending.
  • a first factor F1 is determined in advance for each bend of a workpiece on the basis of a gauge-containing good part, which is the ratio of the actual angle of rotation of the bending drive during overbending (first rotation angle or sum of desired bending angle and overbending angle) to the read out actual bending angle the determination of the actual bending angle results.
  • the further production is controlled on the basis of this first factor for the re-bending process at the same bend. For this purpose, the overbending, then the subsequent free movement and finally the release of the bending arm and the determination of the actual bending angle take place for each bend.
  • the angle determined in this step from the rotary encoder 128 is subtracted from the desired bending angle and the differential angle obtained with the for the Nachbiegevorgang multiplied at the good part determined first factor. The value obtained in this way is used as a bending angle.
  • the first rotation angle can therefore be determined based on a gauge-containing good part of a series of identical bending parts or by a measurement on the current workpiece.
  • An additional second factor F2 may be taken into account to weight the difference angle. This can be useful, for example, if there are too large angular deviations within a series, because otherwise, for example, the first bending over again can lead to an overbending and thus to a wrong angle. As a good approximation, a linear relationship between the angular deviation and the second factor can be assumed.
  • the second factor can in this case be represented by a mathematically generated straight line in an xy-diagram, the x-axis recording the angular deviation and the y-axis the second factor F2, the straight line representing the y-axis at + 1 cuts and has a negative slope.
  • the first factor F1 is maintained almost unchanged for small angular deviations and is suitably reduced in size for larger angular deviations.
  • the slope of the line i. the proportionality factor between the angle deviation and the second factor can be set.
  • a tube is bent with a numerically controlled rotary draw bending machine with a bending mold.
  • Other embodiments work without bending form.
  • a solid rod or a wire can be bent.
  • Workpieces may have a circular, but also oval or polygonal cross-section or be profiled in other ways.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

L'invention porte sur un procédé de fabrication d'une pièce pliée à partir d'une pièce de forme allongée, en particulier d'un tube. Dans ce procédé, on utilise une plieuse qui présente une tête de pliage équipée d'un bras de pliage qui présente un dispositif pour attaquer un segment terminal de la pièce et qui peut tourner autour d'un axe de pliage sous l'action d'un entraînement de pliage commandé par un dispositif de commande. Tout d'abord, un segment de la pièce est placé dans une position de départ dans la zone d'attaque de la tête de pliage. Puis, le dispositif d'attaque est mis en contact avec le segment terminal. Ensuite, dans une opération de pliage, un pli est formé entre un segment côté entrée et le segment d'extrémité par la rotation du bras de pliage autour de l'axe de pliage. Ensuite, on obtient un angle de pliage réel produit par l'opération de pliage. Pour trouver l'angle de pliage réel, le bras de pliage est placé dans une position de mesure dans laquelle un élément du bras de pliage est en contact avec le segment d'extrémité et un signal d'un émetteur qui représente la position de rotation du bras de pliage dans la position de mesure est traité pour déterminer l'angle de pliage réel.
PCT/EP2012/054196 2011-03-25 2012-03-12 Procédé de fabrication d'une pièce pliée et plieuse pour la mise en œuvre du procédé WO2012130596A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011006101.0 2011-03-25
DE102011006101.0A DE102011006101B4 (de) 2011-03-25 2011-03-25 Verfahren zur Herstellung eines Biegeteils und Biegemaschine zur Durchführung des Verfahrens

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WO2012130596A2 true WO2012130596A2 (fr) 2012-10-04
WO2012130596A3 WO2012130596A3 (fr) 2013-05-23

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CN109684753A (zh) * 2018-12-28 2019-04-26 西北工业大学 一种管材弯曲回弹角逆向预测和补偿方法
CN112536342A (zh) * 2020-11-13 2021-03-23 中国航发沈阳黎明航空发动机有限责任公司 一种手工弯板装置
TWI805836B (zh) * 2018-09-05 2023-06-21 義大利商Ｂｌｍ股份有限公司 管加工用機器

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DE102015208350B3 (de) * 2015-05-06 2016-08-25 Wafios Aktiengesellschaft Verfahren zur Herstellung von Formteilen und Umformmaschine zur Durchführung des Verfahrens
DE102016205137B4 (de) 2016-03-29 2017-12-14 Wafios Aktiengesellschaft Verfahren und Biegemaschine zur Herstellung eines mehrdimensional gebogenen Biegeteils
US11833572B2 (en) * 2020-03-06 2023-12-05 Greenlee Tools, Inc. Bender for bending a workpiece with automatic springback compensation
DE102020203394A1 (de) 2020-03-17 2021-09-23 Wafios Aktiengesellschaft Verfahren zur Herstellung eines Biegeteils aus einem Rohr

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