EP1163988A1 - Installation de découpe feuille à feuille avec dispositif de lancement assurant la fonction de calage en position des feuilles - Google Patents
Installation de découpe feuille à feuille avec dispositif de lancement assurant la fonction de calage en position des feuilles Download PDFInfo
- Publication number
- EP1163988A1 EP1163988A1 EP01490020A EP01490020A EP1163988A1 EP 1163988 A1 EP1163988 A1 EP 1163988A1 EP 01490020 A EP01490020 A EP 01490020A EP 01490020 A EP01490020 A EP 01490020A EP 1163988 A1 EP1163988 A1 EP 1163988A1
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- EP
- European Patent Office
- Prior art keywords
- cutting
- sheet
- motor
- speed
- belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
- B26F1/42—Cutting-out; Stamping-out using a press, e.g. of the ram type having a pressure roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/34—Varying the phase of feed relative to the receiving machine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
- B65H2511/21—Angle
- B65H2511/212—Rotary position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2551/00—Means for control to be used by operator; User interfaces
- B65H2551/10—Command input means
Definitions
- the present invention relates to the technical field of cutting one by one semi-rigid sheets, in particular from cardboard, and more particularly, but not exclusively, in corrugated cardboard. She has main purpose of a cutting installation equipped with input a leaf launching device which has been perfected in sort of providing a new wedging function in position of sheets relative to the cutting tool.
- a cutting installation is always integrated in practice in a sheet processing line that includes at least as the first upstream machine, a device for introducing leaves, commonly called feeder, and having in a way general function of automatically inserting the sheets one after the other at the line entrance at a given rate (time interval between two successive sheets) and in their giving a given linear speed.
- the processing line only has a functionality of cutting the sheets
- the machine downstream of the feeder is the installation cutting.
- the line of processing also has the function of making an impression on the sheets, it includes between the feeder and the cutting installation a or several successive printing groups.
- Cutting a semi-rigid sheet, especially from cardboard corrugated, is carried out on conventional cutting installations using a cutting tool and a support surface.
- the cutting tool includes blades or support nets substantially perpendicular to the support surface when the sheet is compressed between this surface support and the cutting tool, so that the threads pass through the sheets and make the corresponding cut.
- the cutting tool is mounted on a tool tray, also commonly known as marble, while the bearing surface is formed by the surface of a cylinder, called cutting cylinder.
- the tool tray is designed to be in operation with a reciprocating movement of va and comes, which allows to move each sheet one after the other under the cutting cylinder from a sheet feeding position to be cut to a position for discharging the cut sheet.
- Such a cutting installation is also equipped upstream of the tool tray and support surface, supply means allowing each sheet to be inserted on the tool tray during displacement thereof relative to the cutting cylinder.
- these means supply systems include two successive systems for transporting leaves.
- the first known as the transfer case, receives the sheet of a upstream machine (feeder or printing unit), and transfer to a substantially constant speed, equal to the exit speed of the sheet of the upstream machine.
- the second known as the launch device, implements a launching belt which receives the sheet of transfer case and introduced it between the tool tray and the cutting cylinder.
- the kinematics of the of the launching device belt is usually controlled so as to have a speed profile which is as follows.
- the linear speed of the launching belt is constant and equal to the speed of the upstream transfer system.
- the belt substantially accelerates to launch achieve the desired launch speed for the sheet (speed linear of the marble in the cutting phase).
- the speed of the launching belt is kept constant (phase during which the sheet is introduced between the cylinder of cutting and the tool holder plate).
- the launching belt decelerates substantially linearly until the transfer system speed is reached again upstream.
- the speed of the drive belt launch is kept constant until the operating cycle next. It is important to emphasize that this speed profile, for a given cutting installation is always the same, whatever either the setting in position of the cutout relative to the sheet that we want to get.
- this synchronism device In the case of feeders mechanical, this synchronism device requires the implementation complex mechanics and a high cost price, based of differential elements. In the case of electronic feeders, it is possible to remove this complex mechanics, however this type feeder due to its high cost price, is reserved for lines high range treatment.
- the present invention provides a new solution to problem of timing in position of the sheets relative to the tool cutting, which is simple to implement and less expensive than currently known solutions, and which simplifies the feeder design.
- the invention is based essentially on a modification brought to the leaf launching device at the entrance of a cutting installation, to give this device launch of a new wedging functionality in position of sheets in relation to the cutting cylinder and the tool tray.
- the main object of the invention is therefore an installation of sheet cut sheet which is known in that it comprises a cylinder cutting table, a reciprocating tool tray, and a device for launching the sheets between the support cylinder and the tool tray, and having a launching belt which is driven by a motor (M3) controlled by electronic means of control, and which allows, in synchronism with the movement of the tool tray and rotation of the cutting cylinder, speed up each sheet from a first linear speed (V1) to a second linear speed (V2) equal to the linear speed of the tool tray (2) during the cutting operation.
- M3 motor
- the installation of cutting includes means allowing entry by an operator a setting parameter (S) characterizing the position of the cut in each sheet relative to the front or rear edge of the sheet, and the electronic engine control means (M3) are designed to slaving in time, in position and speed, the motor (M3) in function of this setting parameter (S).
- S setting parameter
- M3 electronic engine control means
- It is another object of the invention to propose a line of sheet-to-sheet cutting comprising a sheet-to-sheet cutting installation sheet according to the invention and a mechanical feeder which is coupled mechanically for its operation on the driving motor shaft in rotation the cutting cylinder, without means for adjusting the position moving parts of the mechanical feeder relative to the position angle of the shaft of this motor.
- an installation for cutting one by one of semi-rigid sheets, and in particular of blanks of corrugated cardboard is incorporated successively, from entry to exit installation of a mechanical feeder A, a printing unit flexographic B, a transfer device C and a cutting unit D.
- the cutting unit D essentially comprises a cylinder of cutout 1, a tool tray 2 commonly known as marble, and a launching device 3.
- the marble 2 is usually designed to be reciprocated back and forth under the cylinder cutting 1, and carries metal nets for cutting a sheet of cookie cutter, by pinching the sheet between the cutting cylinder 1 and marble 2.
- the cutting unit D is equipped with a first motor M1 coupled to a reducer R1, by a transmission belt C1.
- R1 reducer has two outputs: the main output gear R1 directly drives the shaft 1a of the blank 1 cylinder; the secondary output of the reducer R1 is used for driving the feeder A, the printing unit B and the transfer device C.
- the transmission belt C1 between the motor M1 and the reducer R1 has been intentionally omitted.
- the motor M1 is controlled so as to drive this cutting cylinder 1 at a known predetermined constant speed, fixing the operating cycle of the installation (after an initial phase of linear acceleration when starting the installation ).
- the motor M1 is a brushless motor.
- this motor M1 does not require stepping, we can use more generally any motor delivering sufficient torque and allowing to rotate the cutting cylinder 1 at a substantially constant angular speed. We could thus use for example a vector asynchronous motor.
- the marble 2 for its movement alternative to the cutting cylinder 1 is mounted so usual on two parallel racks 4 and 5, which mesh respectively each with two identical pinions 6 (only one of two pinions 6 being visible in FIG. 3), the two pinions being driven by a M2 brushless motor, through a set of transmission pinion 7.8.
- the kinematics of the return movement of the marble with respect to the cutting cylinder 1, as well as the means of control of the M2 brushless motor to obtain this kinematics will detailed later.
- the invention is not limited to the use of a brushless motor for the motor (M2), but that we can generally use any motor can be controlled with sufficient precision in speed and position.
- marble 2 could be driven by the same motor as that (M1) used to drive the cutting cylinder in rotation.
- the launching device 3 is positioned immediately upstream of the cutting cylinder 1, above the rear path of the plate 2.
- This launching device 3, the structure of which is known per se, essentially comprises a belt 9 permeable to air (for example perforated belt), tensioned on two rollers 10, 11, one of which 10 is mounted to rotate freely and the other 11 of which is a motor.
- the upper strand 9a of the belt 9 which successively receives the sheets coming from the transfer device C, is inclined slightly downwards in the direction of the marble 2.
- the launching device comprises aeraulic means making it possible in the usual way to create an air flow through the upper strand 9 has the belt 9 so as to press and hold a sheet on the surface of the belt without risk of slipping of the sheet.
- the shaft 11a of the drive roller 11 is mechanically coupled to its rotary drive to a brushless motor M3 via two pinions 12 and 13 connected by a transmission belt 14 , the pinion 13 being mounted directly on the output shaft of the motor M3.
- the function of the launching belt 9 is to take up a sheet brought to an initial linear speed (V1) by the transfer device C, and to bring this sheet between the plate 2 and the cutting cylinder 1 of the cutting, in synchronism with these two elements, and making it undergo an acceleration until reaching a determined linear speed (V2) equal to the linear speed of advancement of the marble 2 under the cutting cylinder 1 during cutting.
- the invention is not limited to the use of a brushless motor for the motor (M3), but that one can more generally use any motor which can be controlled with sufficient precision in speed and position; it could be a vertical asynchronous motor with low inertia and offering characteristics comparable to a brushless motor.
- the mechanical feeder (A) has essentially two superposed rollers A1 and A2, associated with a upstream device A3, reciprocating, and having the usual manner function of pushing the sheets one by one between the two rollers A1 and A2.
- This pushing device A3 being known, it will not be detailed.
- the two rollers A1 and A2 of the feeder A are mechanically coupled to the secondary output of the reducer R1 by a mechanical transmission chain comprising essentially from the output of the reducing secondary R1, a transmission by cardan CA, a second R2 reducer with return angle, and an A4 belt driving the two rollers A1 and A2 at the same speed and in opposite directions.
- the A3 leaf pushing device is coupled to the axis of rotation of the lower roller A2, by a pinion A5 driving a mechanism A6 known rod type, allowing to transform the rotational movement continuous of pinion A5 in an alternating movement of given amplitude.
- this transmission chain does not allow any adjustment of the position of the mobile elements (A1, A2, A3) of the mechanical feeder by relative to the angular position of the shaft of this motor (M1). So, unlike the usual implementation of a mechanical feeder in a cutting installation, no provision is made between the feeder and the shaft mechanical control of this feeder (in this case secondary output gearbox R1) no synchronism system based on differentials allowing a user to program a delay or an advance of feeder operation in relation to the operating cycle of the cutting unit E.
- the feeder A under the control motor rotation M1 is designed to deliver leaves one after the other, communicating a speed to each sheet data set by the speed of rotation of the rollers A1 and A2, and above all with a positioning of each sheet at the output of the feeder relative to the angular position of the cutting cylinder which is adjusted once for all during the design of the cutting installation, and which is not modifiable by a user of the installation.
- This relative positioning corresponds to an initial setting of a sheet with respect to the cylinder of cutting, and determines an initial position of the cutting in the sheet.
- each sheet output by feeder A is taken up directly by pinching between the plate cylinder B1 and the backpressure cylinder B2 of the printing group.
- the transfer device C is known per se and will therefore not be detailed. It essentially implements a box containing a plurality of CT conveyor belts, of small width, parallel and spaced, and mounted tensioned, above a perforated curved plate P, on two rollers, one of which 17 a is motor and the other 17 b is mounted free to rotate.
- the drive roller 17 a for its rotational drive, is coupled to the secondary output of the reducer R1, by a synchronous transmission belt C2 and a reducer R4.
- This transmission chain is calculated so that the linear speed (V1) of the CT belts is constant (the motor M1 being driven at constant speed) and substantially equal to the linear speed of the sheets leaving the printing unit (circumferential speed backpressure cylinders B2 and plate holder B1).
- the CT conveyor belts make it possible to receive the sheets one after the other after printing and to convey them at a constant speed (V1) to the launching device 3 of the cutting unit.
- the transfer device (C) is equipped with suction means (not shown) making it possible to press the transported sheets against the upper side of CT belts.
- Control means for brushless motors M1 to M3 ( Figure 5)
- each brushless motor M1 to M3 is equipped with a sensor (not shown), commonly known as a “resolver” delivering a information on the instantaneous angular position of the motor rotor ( Figure 5, signal 18), and is controlled in torque mode by a variator 19 providing the engine with three control signals (R, S, T), depending a setpoint signal 20, and position feedback information (signal 18).
- a sensor not shown
- a variator 19 providing the engine with three control signals (R, S, T), depending a setpoint signal 20, and position feedback information (signal 18).
- each brushless motor M2 to M3 is equipped with an incremental encoder 21 mounted directly on the motor rotor and coding in the form of pulses the angular position of the rotor (signal 22), the number of pulses per revolution of the rotor being fixed and defined by the resolution of the encoder.
- the cutting unit D also includes a third incremental encoder 21 ', which is mounted directly on the shaft 1 a of the cutting cylinder 1.
- This encoder 21' delivers a first signal 22 'coding under pulse shapes the angular position of the cutting cylinder 1, as well as a second signal 23 'which is synchronous with the first signal 21', and which results in one pulse every (n) pulses of the first signal 21 ', the counting factor (n) being configurable.
- the counting factor (n) of this signal is adjusted so that the encoder 21 'associated with the motor M1 delivers a pulse (synchronization signal 23') at each revolution of the cutting cylinder 1, each pulse (top synchronization) being used for synchronization of other M2 and M3 motors.
- the cutting unit has an axis card 24 which makes it possible to drive in parallel at least three distinct axes (one axis corresponding to a brushless motor M1, M2 or M3).
- the card 24 usually comprises a trajectory generator 25 which is controlled by a movement program 26 stored in RAM.
- This movement 26 program communicates successively over time with the associated trajectory generator 25 information on the next axis trajectory point (next position of the axis, speed of the axis at this position, and duration of movement axis to reach this position), the trajectory generator automatically calculating point by point the kinematics of the axis between two successive points provided by the movement program 26.
- the trajectory generator 25 delivers a position setpoint 27 which is compared to the position feedback signal 22 or 22 '.
- the signal from setpoint 20 for controlling each drive 19 is generated by a regulator R, for example of the PID type, from the difference between the setpoint 27 delivered by the trajectory generator 25 and the signal position feedback 22 or 22 '.
- the movement 26 program for controlling each motor brushless M1, M2, and M3 is specific to the kinematics respectively of the cutting cylinder 1, of the plate 2 and of the belt 9 of the launch 3.
- the kinematics of the cutting cylinder 1 is extremely simple, since the latter is driven at constant angular speed ( ⁇ 0 ) by the motor M1, with the exception of the initial start-up phase, during which movement program 26 provides the trajectory generator 25 controlling the motor M1, trajectory points allowing constant acceleration of the cutting cylinder, until reaching the predefined rotation speed ( ⁇ 0 ).
- each operating cycle of the stage 2 is broken down into three main phases, the start of a cycle being synchronized by the synchronization signal 23 '(top synchronization) delivered by the incremental encoder 21 'of the M1 engine.
- the first phase (phase 1 / FIG. 5) is a waiting phase of fixed and known duration (t offset ), during which the plate 2 is stationary in a known position, called neutral. This is position (a) of the marble 2 in FIG. 4. In this neutral position, the first marble cutting thread is located at a known distance d from the axis of rotation of the cutting cylinder 1.
- the second phase corresponds to the forward movement of the marble.
- This phase breaks down as follows.
- the marble accelerates (Figure 5 / point P 0 to P 2 ) to the position referenced (b) in Figure 4.
- This position corresponds to a positioning of the front edge of the marble 2 upstream of the cylinder of and cutting away of the weak axis of the cylinder.
- the marble 2 is driven at constant speed V2 ( Figure 5 / points P 2 to P 3 ) to the position referenced (c) in Figure 4.
- the marble 2 undergoes a deceleration (figure 5 / points P 3 to P 5 ) until reaching at zero speed the position referenced (d) in figure 4.
- the cutting sheet and the cutting clippings are in a known manner removed from the marble 2 partly as soon as the marble arrives in position (c) and before the marble returns 2.
- the third phase corresponds to the return movement of the plate from position (d) to the neutral position (a).
- This third phase is also broken down into an acceleration step ( Figure 5 / points P 5 to P 6 ), a step of moving the marble at constant speed (point P 7 to P 8 ) and a deceleration step to '' to reach position point (a) with zero speed ( Figure 5 / points P 8 to P 10 ).
- the intermediate positions of the plate 2 at the end of the acceleration and displacement stages at constant speed do not necessarily correspond to the positions (b) and (c) of the forward movement.
- the movement program 26 for controlling the motor M2 is parameterized by the designer of the cutting unit, at least with the points P 0 to P 10 (FIG. 5), which correspond to changes in the speed profile of the plate. In practice, other intermediate programming points are also inserted by the designer of the cutting unit D.
- Each point P i corresponds to three pieces of information supplied by the movement program 26 for the trajectory generator 25: position information (X i ) characterizing the distance (for example in mm) of movement of the plate 2 from the previous position P i-1 ,; speed information ( ⁇ i ) giving the speed of the rotor of the motor M2 (in rev / s) to obtain the required instantaneous linear speed of the plate at position P i ; temporal information (T i ) characterizing the duration of movement of the plate 2 between the positions P i-1 and P i .
- each operating cycle of the launching device 3 is broken down into five phases, and is, in the same way as for the stage 2, synchronized by the synchronization signal 23 '(top synchronization ) delivered by the incremental encoder 21 'of the motor M1.
- Phase (1) the motor M3 drives the belt 9 at a first constant linear speed (point P ' 0 of the trajectory) which is equal to the linear speed V 1 of the belts CT of the transfer device.
- Phase (2) [points P ' 1 to P' 4 ]: acceleration of the belt 9 of the launching device until reaching a second constant linear speed which is equal to the limit speed V 2 of the plate 2 in the cutting phase.
- Phase (3) [points P ' 4 to P' 5 ]: drive of the belt 9 of the launching device at this second speed.
- Phase (4) [points P ' 5 to P' 8 ]: deceleration of the belt 9 of the launching device until again reaching the first aforementioned linear speed equal to the linear speed of the belts CT of the transfer device.
- Phase (5) [points P ' 8 to P' 9 ]: drive of the belt 9 of the launching device at this first speed
- the axis card 24 has been programmed by the designer of the cutting installation with at least the points (P ' 0 to P' 9 ) of the trajectory which is shown in solid lines in FIG. 6, and which is designated below as the reference trajectory, each point P ′ i being characterized by position information (X ′ i ), defining the distance (for example in mm) from movement of the belt 9 from the previous position P i-1 , speed information ( ⁇ ' i ) giving the speed of the motor rotor M3 (in rev /: s) to obtain the required instantaneous linear speed of the belt 9 at position P ' i , and time information (T' i ) characterizing the duration of movement of the belt 9 between positions P ' i-1 and P' i
- the reference trajectory (solid line trajectory in the figure 6) which is initially programmed in the axis card 24 corresponds to an initial setting in position of each sheet relative to the cylinder of cutout 1, which translates in practice into an initial position determined of the cut in each sheet, in relation to the front edge (or back) of the sheet.
- one of the input / output ports 28 of the card with axis 24 is connected, for example by a serial link of RS232 type, to input / output means 29 (operator interface), comprising input means such as a keyboard and display means (screen).
- the axis card 24 is also programmed to execute in the background a program 30, which permanently performs a scanning loop of the input / output port 28, and which on detection of the sending by the means of input / output 29 of a new timing parameter (S), interrupts its scanning loop, performs the calculation of a new value (T ' 1 ) for point P' 1 of the trajectory of the belt 9 of the launch, and a new value (T ' 5 ) for the point P' 5 of the trajectory of the belt 9 of the launching device, sends these new values of the parameters T ' 1 and T' 5 to the movement program 26 controlling the trajectory generator 25 associated with the motor M3, then resumes its scan loop of the input / output port 28, pending a new value for the setting parameter (S).
- a program 30 which permanently performs a scanning loop of the input / output port 28, and which on detection of the sending by the means of input / output 29 of a new timing parameter (S), interrupts its scanning loop, performs the calculation of a new value (T '
- FIG. 7 shows a sheet (F) having a cutout 31, which has been produced at an initial distance e given from the front edge 32 of the sheet F.
- This initial distance e corresponds to an initial setting of the sheet relative to to the support cylinder 1 (reference trajectory in solid line in FIG. 6).
- the setting parameter (S) is a distance of advance (negative value) or delay (positive value) compared to the initial distance ( e ) which is entered by the operator.
- the deviation Sa an example of the advance distance
- the deviation Sr an example of the delay distance.
- the aforementioned program 30 of the axis card 24 is designed to calculate the new value of T ' 5 by subtracting from the current value of T' 5 the above-mentioned variation in time ⁇ t.
- FIG. 6 There are shown in dotted lines in FIG. 6, two examples of modification of the trajectory of the belt 9 of the launching device 3, consecutive respectively to the entry of a distance of advance Sa and of a distance of delay Sr with respect to the initial setting distance ( e ).
- the time values corresponding to the time variation ⁇ t calculated automatically each time by the program 30 of the axis card 24 are indicated respectively Ta and Tr.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Control Of Cutting Processes (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Nonmetal Cutting Devices (AREA)
- Paper Feeding For Electrophotography (AREA)
- Displays For Variable Information Using Movable Means (AREA)
- Details Of Cutting Devices (AREA)
Abstract
Description
- la figure 1 est une représentation schématique, vue de coté, d'une ligne de traitement de flans de carton, avec margeur, groupe d'impression flexographie, dispositif de transfert et installation de découpe feuille à feuille ;
- la figure 2 est représentation agrandie et plus précise de l'installation de découpe de la figure 1 ;
- la figure 3 est une représentation simplifiée de l'installation de découpe, montrant de manière schématique les moteurs (M1), (M2) et (M3) utilisés pour l'entraínement respectivement du cylindre de découpe, du plateau porte-outil (marbre) et de la courroie du dispositif de lancement ;
- la figure 4 illustre de manière schématique les différentes postions du plateau porte-outil de l'installation de découpe pendant son mouvement aller ;
- la figure 5 est un synoptique des moyens électroniques de commande des moteurs (M1), (M2), (M3) ;
- la figure 6 représente dans le temps, et pour un cycle de
fonctionnement (découpe d'une feuille) :
- courbe (I) : la vitesse de rotation du moteur (M1)/ cylindre de découpe,
- courbe (II) : la vitesse de rotation du moteur (M3)/ courroie de lancement,
- courbe (III) : la vitesse de rotation du moteur (M2) / plateau porte-outil,
- et la figure 7 représente une découpe réalisée dans une feuille selon plusieurs valeurs de calage.
1ère contrainte : la vitesse constante de déplacement du marbre en phase découpe doit être égale à la vitesse linéaire du cylindre de découpe 1., soit : pour le point P2 de la trajectoire du marbre :
2ème contrainte : la distance de déplacement du marbre pendant la phase de découpe (paramètre X3 du point P3 de la trajectoire du marbre) doit être supérieure ou égale à la dimension de la feuille dans le sens machine.
3ème contrainte : la distance aller du marbre doit être égale à la distance retour ( X1+X2+X3+X4+X5 = X6+X7+X8+X9+X10).
Phase (1): le moteur M3 entraíne la courroie 9 à une première vitesse linéaire constante ( point P'0 de la trajectoire) qui est égale à la vitesse linéaire V1 des courroies CT du dispositif de transfert.
Phase (2) [points P'1 à P'4] : accélération de la courroie 9 du dispositif de lancement jusqu'à atteindre une seconde vitesse linéaire constante qui est égale à la vitesse limite V2 du marbre 2 en phase découpe.
Phase (3) [points P'4 à P'5] : entraínement de la courroie 9 du dispositif de lancement à cette seconde vitesse.
Phase (4) [points P'5 à P'8] : décélération de la courroie 9 du dispositif de lancement jusqu'à atteindre de nouveau la première vitesse linéaire précitée égale à la vitesse linéaire des courroies CT du dispositif de transfert.
Phase (5) [points P'8 à P'9] : entraínement de la courroie 9 du dispositif de lancement à cette première vitesse
Δt = S/(V2 -V1) avec S ayant une valeur négative ou positive (par exemple en mm) selon que la distance de calage qui a été saisie est respectivement une distance d'avance ou de retard, V2 étant la vitesse linéaire d'avance ( par exemple en mm/s) en phase de découpe , et V1 correspond à la vitesse linéaire d'entraínement ( par exemple en mm/s) des courroies CT du dispositif de transfert.
A l'inverse, le programme 30 précité de la carte d'axe 24 est conçu pour calculer la nouvelle valeur de T'5 en soustrayant à la valeur courante de T'5 la variation de temps Δt précitée.
Claims (9)
- Installation (D) de découpe feuille à feuille comportant un cylindre de découpe (1), un plateau porte-outils (2) à mouvement alternatif, et un dispositif (3) pour le lancement des feuilles entre le cylindre d'appui (1) et le plateau porte-outil (2), et comportant une courroie (9) de lancement qui est entraínée par un moteur (M3) piloté par des moyens électroniques de commande, et qui permet, en synchronisme avec le mouvement du plateau porte-outils et la rotation du cylindre de découpe (1), d'accélérer chaque feuille depuis une première vitesse linéaire (V1) jusqu'à une seconde vitesse linéaire (V2) égale à la vitesse linéaire du plateau porte-outil (2) lors de l'opération de découpe, caractérisée en ce qu'elle comprend des moyens (28, 29,30) permettant la saisie par un opérateur d'un paramètre de calage (S) caractérisant la position de la découpe (31) dans chaque feuille (F) par rapport au bord avant ou arrière (32) de la feuille (F), et en ce que les moyens électroniques de commande du moteur (M3) sont conçus pour asservir dans le temps, en position et en vitesse, le moteur (M3) en fonction de ce paramètre de calage (S).
- Installation selon la revendication 1 caractérisée en ce que les moyens électroniques de commande du moteur (M3) pilotent le moteur (M3) en fonction d'une trajectoire de points (P'i) programmée, chaque point P'i étant caractérisé par une information de position (X'i), définissant la distance de déplacement de la courroie de lancement (9) depuis la position précédente Pi-1,, une information de vitesse (Ω'i) définissant la vitesse du rotor du moteur (M3) pour obtenir la vitesse linéaire instantanée requise de la courroie 9 à la position P'i, et une information temporelle (T'i) caractérisant la durée de déplacement de la courroie de lancement (9) entre les positions P'i-1 et P'i, et en ce que les moyens électroniques de commande du moteur (M3) comprennent un programme (30) permettant, à chaque modification du paramètre de calage (S) de calculer automatiquement une nouvelle trajectoire de points (P'i).
- Installation selon la revendications 2 caractérisée en ce que le programme (30) de calcul de trajectoire est conçu pour calculer une variation de temps (Δt) fonction de la valeur du paramètre de calage (S) qui a été saisie et de l'écart entre les première (V1) et seconde (V2) vitesses linéaires, pour calculer, par ajout de la variation de temps (Δt) calculée, une nouvelle valeur pour l'information temporelle (T'1) du point (P'1) de la trajectoire correspondant au point d'entrée dans la phase d'accélération de la courroie de lancement (9), et pour calculer par soustraction de la variation de temps (Δt) calculée, une nouvelle valeur pour l'information temporelle (T'5) du point (P'5) de la trajectoire correspondant au point de sortie de la phase d'entraínement de la courroie de lancement (9) à vitesse constante (V2).
- Installation selon l'une des revendications 1 à 3 caractérisée en ce que le moteur (M3) est un moteur brushless.
- Ligne de découpe feuille à feuille comportant une installation de découpe feuille à feuille et un margeur mécanique pour l'introduction une à une des feuilles en synchronisme avec la rotation du cylindre de découpe (1) de l'installation de découpe, caractérisée que l'installation de découpe (D) est conforme à celle visée à l'une des revendications 1 à 5 et en ce que le margeur mécanique (A) est couplé mécaniquement pour son fonctionnement à l'arbre du moteur (M1) entraínant en rotation le cylindre de découpe (1), sans moyen de réglage de la position des éléments mobiles (A1, A2, A3) du margeur mécanique par rapport à la position angulaire de l'arbre de ce moteur (M1).
- Dispositif pour le lancement d'une feuille à l'entrée d'une unité de découpe et comportant une courroie (9) de lancement qui est entraínée par un moteur (M3) piloté par des moyens électroniques de commande, et qui permet, en synchronisme avec un signal de synchronisation (23') d'accélérer chaque feuille depuis une première vitesse linéaire (V1) jusqu'à une seconde vitesse linéaire (V2), caractérisé en ce qu'il comprend des moyens (28, 29,30) permettant la saisie par un opérateur d'un paramètre de calage (S) caractérisant la position de la découpe (31) dans chaque feuille (F) par rapport au bord avant ou arrière (32) de la feuille (F), et en ce que les moyens électroniques de commande du moteur (M3) sont conçus pour asservir dans le temps, en position et en vitesse, le moteur (M3) en fonction de ce paramètre de calage (S).
- Dispositif selon la revendication 6 caractérisé en ce que les moyens électroniques de commande du moteur (M3) pilotent le moteur (M3) en fonction d'une trajectoire de points (P'i) programmée, chaque point P'i étant caractérisé par une information de position (X'i), définissant la distance de déplacement de la courroie de lancement (9) depuis la position précédente Pi-1,, une information de vitesse (Ω'i) définissant la vitesse du rotor du moteur (M3) pour obtenir la vitesse linéaire instantanée requise de la courroie 9 à la position P'i, et une information temporelle (T'i) caractérisant la durée de déplacement de la courroie de lancement (9) entre les positions P'i-1 et P'i, et en ce que les moyens électroniques de commande du moteur (M3) comprennent un programme (30) permettant, à chaque modification du paramètre de calage (S) de calculer automatiquement une nouvelle trajectoire de points (P'i).
- Dispositif selon la revendications 7 caractérisé en ce que le programme (30) de calcul de trajectoire est conçu pour calculer une variation de temps (Δt) fonction de la valeur du paramètre de calage (S) qui a été saisie et de l'écart entre les première (V1) et seconde (V2) vitesses linéaires, et pour calculer, par ajout de la variation de temps (Δt) calculée, une nouvelle valeur pour l'information temporelle (T'1) du point (P'1) de la trajectoire correspondant au point d'entrée dans la phase d'accélération de la courroie de lancement (9), et pour calculer par soustraction de la variation de temps (Δt) calculée, une nouvelle valeur pour l'information temporelle (T'5) du point (P'5) de la trajectoire correspondant au point de sortie de la phase d'entraínement de la courroie de lancement (9) à vitesse constante (V2).
- Dispositif selon l'une des revendications 6 à 8 caractérisé en ce que le moteur (M3) est un moteur brushless.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0007734A FR2810268B1 (fr) | 2000-06-16 | 2000-06-16 | Installation de decoupe feuille a feuille avec dispositif de lancement assurant la fonction de calage en position des feuilles |
FR0007734 | 2000-06-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1163988A1 true EP1163988A1 (fr) | 2001-12-19 |
EP1163988B1 EP1163988B1 (fr) | 2003-01-15 |
Family
ID=8851359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01490020A Expired - Lifetime EP1163988B1 (fr) | 2000-06-16 | 2001-06-06 | Installation de découpe feuille à feuille avec dispositif de lancement assurant la fonction de calage en position des feuilles |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1163988B1 (fr) |
AT (1) | ATE231054T1 (fr) |
DE (1) | DE60100084T2 (fr) |
ES (1) | ES2191003T3 (fr) |
FR (1) | FR2810268B1 (fr) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4604083A (en) * | 1983-02-21 | 1986-08-05 | Bobst Sa | Machine for manufacturing folded boxes |
EP0620088A1 (fr) * | 1993-04-16 | 1994-10-19 | Jean Pierre Cuir | Dispositif à revêtement interchangeable pour découper une à une des feuilles semi-rigides, notamment de carton |
US5613675A (en) * | 1994-01-27 | 1997-03-25 | Heidelberger Druckmaschinen | Method and device for conveying sheets in a feeder region of a sheet-processing machine |
US6059705A (en) * | 1997-10-17 | 2000-05-09 | United Container Machinery, Inc. | Method and apparatus for registering processing heads |
-
2000
- 2000-06-16 FR FR0007734A patent/FR2810268B1/fr not_active Expired - Lifetime
-
2001
- 2001-06-06 ES ES01490020T patent/ES2191003T3/es not_active Expired - Lifetime
- 2001-06-06 EP EP01490020A patent/EP1163988B1/fr not_active Expired - Lifetime
- 2001-06-06 DE DE60100084T patent/DE60100084T2/de not_active Expired - Lifetime
- 2001-06-06 AT AT01490020T patent/ATE231054T1/de not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4604083A (en) * | 1983-02-21 | 1986-08-05 | Bobst Sa | Machine for manufacturing folded boxes |
EP0620088A1 (fr) * | 1993-04-16 | 1994-10-19 | Jean Pierre Cuir | Dispositif à revêtement interchangeable pour découper une à une des feuilles semi-rigides, notamment de carton |
US5613675A (en) * | 1994-01-27 | 1997-03-25 | Heidelberger Druckmaschinen | Method and device for conveying sheets in a feeder region of a sheet-processing machine |
US6059705A (en) * | 1997-10-17 | 2000-05-09 | United Container Machinery, Inc. | Method and apparatus for registering processing heads |
Also Published As
Publication number | Publication date |
---|---|
EP1163988B1 (fr) | 2003-01-15 |
FR2810268B1 (fr) | 2002-10-25 |
FR2810268A1 (fr) | 2001-12-21 |
ATE231054T1 (de) | 2003-02-15 |
ES2191003T3 (es) | 2003-09-01 |
DE60100084T2 (de) | 2003-11-20 |
DE60100084D1 (de) | 2003-02-20 |
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