EP2769813B1 - Verfahren zur Kalibrierung der Position der Rollenschneidklingen eines Rollenschneiders - Google Patents

Verfahren zur Kalibrierung der Position der Rollenschneidklingen eines Rollenschneiders Download PDF

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Publication number
EP2769813B1
EP2769813B1 EP13193794.8A EP13193794A EP2769813B1 EP 2769813 B1 EP2769813 B1 EP 2769813B1 EP 13193794 A EP13193794 A EP 13193794A EP 2769813 B1 EP2769813 B1 EP 2769813B1
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EP
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Prior art keywords
slitter
slitter blade
blade
carriage
machine direction
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EP13193794.8A
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English (en)
French (fr)
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EP2769813A2 (de
EP2769813A3 (de
Inventor
Michael Daul
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Valmet Technologies Oy
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Valmet Technologies Oy
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2628—Means for adjusting the position of the cutting member
    • B26D7/2635—Means for adjusting the position of the cutting member for circular cutters

Definitions

  • the present invention relates to a slitter-winder of a fiber web production line in general and in particular to a method for calibrating the position of the slitter blades of a slitter-winder.
  • a fiber web e.g. paper
  • a fiber web is manufactured in machines which together constitute a paper-manufacturing line which can be hundreds of meters long.
  • Modern paper machines can produce over 450,000 tons of paper per year.
  • the speed of the paper machine can exceed 2,000 m/min and the width of the fiber web can be more than 11 meters.
  • a fiber web completing in the paper machine is reeled by a reel-up around a reeling shaft, i.e. a reel spool, into a parent roll the diameter of which can be more than 5 meters and the weight more than 160 tons.
  • the purpose of reeling is to modify the fiber web manufactured as planar to a more easily processable form.
  • the continuous process of the paper machine breaks for the first time and shifts into periodic operation.
  • the web of the parent roll produced in paper manufacture is full-width and even more than 100 km long, so it must be slit into partial webs with suitable width and length for the customers of the paper mill and wound around cores into so-called customer rolls before delivering them from the paper mill.
  • This slitting and winding up of the web takes place in an appropriate separate machine, i.e. a slitter-winder.
  • the parent roll On the slitter-winder, the parent roll is unwound, and the wide web is slit on the slitting section into several narrower partial webs which are wound up on the winding section around winding cores, such as spools, into customer rolls.
  • the slitter-winder is stopped and the wound rolls, i.e. the so-called set, is removed from the machine. Then, the process is continued with the winding of a new set.
  • These steps termed a set change, are repeated in sequences periodically until paper runs out of the parent roll, at which point a parent roll change is performed and the operation starts again with the unwinding of a new parent roll.
  • a fiber web is slit in the longitudinal direction i.e., in the machine direction, into several component webs between a pair of slitter blades comprising a top slitter blade and a bottom slitter blade.
  • the width of the component webs to be slit by the slitter blades and thus the position of the slitter blades can vary to a great extent when different slitter blade settings are used, depending on the set widths of the rolls to be produced.
  • the slitter blades have to be positioned, in the lateral direction i.e., the cross machine direction of the web, in the right slitting position corresponding to the desired roll widths.
  • the slitter blades of the slitter-winder are spaced apart as desired in the cross machine direction of the paper or board web, that is, a change of settings is carried out.
  • US 4 548 105 B1 discloses a method and a system for observing a position.
  • This publication describes the use of the method in a system used in the slitting of a paper web.
  • a measuring device is used which is in a position arrangement which comprises actuating members for controlling and performing the movement of the measuring device in the cross machine direction of the web and which system comprises at least one limiter for limiting the operation of the measuring device along the distance between the extreme positions such that one extreme position serves as the datum position for the determination.
  • An observing device in both directions of movement observes at least one member of the slitting device.
  • the system comprises drive means for the actuating members and moving devices performing a corrective movement of a movable device or member.
  • the position of the slitter blades are determined when the machine is stopped by means of forgoing arrangement, so as to minimize the duration of the standstill.
  • a device that has a magnetic measuring system, in which position detection devices are connected with the carriages of the slitter blades, and a magnetic band which is used to determine position extends over the path of the carriages.
  • a slitter blade arrangement in which at least one light-emitting element, i.e., a laser, which emits visible radiation is arranged so as to be adjustable, the light beam of the laser is oriented to a desired position for a cutting blade, the laser producing a mark, that is a spot of light, which corresponds to the position to which the cutting blade is to be directed.
  • the laser can be used to produce a fan beam which forms a line in the cutting direction i.e., the machine direction, which marks a selected position for a slitter blade.
  • each slitter blade carriage is equipped with a fixed permanent magnet, and the distance between the permanent magnet and the slitter blade is constant, and the position of the permanent magnet is measured by means of a magnetic measuring device, thereby establishing the position of the slitter blade.
  • information is also needed in addition to the information on the position of the slitter blade carriage.
  • WO 2009/156566 A1 there is disclosed a method for calibrating the position of slitter blades of a slitter-winder in which there is at least one stationary fixed point of the frame of the slitter-winder. An edge of at least one slitter blade is positioned in relation to the position of the slitter blade carriage. Each fixed point is in the cross machine direction of the frame such that each slitter blade being positioned extends to at least one fixed point.
  • a sensor measures the position of the edge of the slitter blade with respect to a fixed point.
  • the sensor measures the position of the edge of the slitter blade with respect to the fixed point and the distance between the edge and the slitter blade carriage is specified because the position of the slitter blade carriage is continuously known. Based on knowing the distance between the edge and the slitter blade carriage, the slitter blade can be positioned by positioning the carriage.
  • the sensor is a distance sensor which measures the position of the slitter blade, preferably the edge, at the moment of calibration.
  • the slitter blade can be spaced from the sensor.
  • US 4 548 105 A shows a measuring and positioning process for slitter blades by moving a measuring device for determining a position of slitter blades in the transverse direction of a web to be cut when the measuring device moves past a slitting edge of the slitter blades, preferably, the edge of the lower slitter, along said transverse direction. Then, the determined (measured) position is compared to a desired position value with respect to a specific datum position acting as a reference position. In case the determined position differs from said desired position value, a corrective movement of the slitter blades into said (new) desired position is made.
  • DE 101 43 508 A1 shows a method for determining and adjusting a cutting gap of a rotating cutting knife by using a non-contact sensor.
  • the non-contact sensor measures an actual distance between the knife and a cutting edge and then a cutting gap can be adjusted to a desired set value by moving the knife in a horizontal direction.
  • An object of the invention is to provide an easy-to-use and reliably operating method for calibrating the position of the slitter blades of a slitter-winder.
  • the object of the present invention is achieved by a method for calibrating the position of slitter blades of a slitter-winder having the features of claim 1.
  • the invention provides a method for calibration of positions of slitter blades of a slitter-winder in a fiber web production line in which a laser is used.
  • the calibration is performed while the slitter is in standstill and no fiber web is running or being slit between the slitter blades.
  • Laser measurement for calibration is provided at the fiber web cutting point of a slitter blade, preferably the top slitter blade of a pair of slitter blades, and the laser measurement calibration is used to calibrate the slitter blade carriage position sensors.
  • a laser measures one slitter blade of each slitter blade pair when they are engaged without a web present.
  • Slitter blade pairs between the laser and the slitter blade pair being measured are separated to allow the laser beam to reach the furthest pair, and one-by-one the pairs of slitter blades progressively closer to the laser are closed and measured. Simultaneously with measuring each slitter blade pair the carriage positions are read.
  • the shape of slitter blades is typically such that the cutting edge is sharpened with one side inclined and the other side straight.
  • the laser measurement system is located such that the laser beam is directed to the slitter blade to its straight side thus resulting in further accuracy to the measurement.
  • the calibration of positions of slitter blades is typically needed after replacement of a slitter blade(s) or after replacement of a sensor(s) on a carriage(s) or after a power failure or a corresponding disturbance in operation but not in connection with each repositioning of the slitter blades for the selected slitting position corresponding to the desired roll widths.
  • the method for calibrating the position of slitter blades of a slitter-winder in a fiber web production line in which slitter blades are moved by slitter blade carriages mounted on cross machine direction guides of the slitter-winder.
  • the cross machine direction is defined as perpendicular to the running direction or machine direction of the fiber web. The slitter blades thus are moved to slitting positions for slitting the fiber web into partial webs which extend in the machine or longitudinal direction of the fiber web.
  • At least one of the slitter blades of each slitter blade pair is movable upwards and downwards in the carriage in relation to its distance to the other slitter blade of the slitter blade pair for engaging and correspondingly opening each slitter blade pair.
  • the positions of the carriages are measured by slitter blade carriage sensors.
  • Each slitter blade pair position is measured and calibrated, with a laser sensor which measures and calibrates the positions of one slitter blade of each slitter blade pair. The measurement of said calibration is performed while the slitter-winder is at a standstill and no fiber web is running or being slitted between the slitter blades.
  • the measurement and said calibration is provided at the fiber web cutting point of each slitter blade pair used to calibrate the slitter blade carriage position sensors.
  • the laser sensor measures the distance to one slitter blade of each slitter blade pair when the pair is engaged, while other slitter blade pairs between the laser sensor and the slitter blade pair are not engaged and so do not block the laser beam from reaching the one slitter blade which is being measured.
  • the measurement and the calibration by the laser sensor is provided to measure and calibrate the positions of each slitter blade pair one-by-one.
  • the slitter blade carriage positions are defined simultaneously with said measurement and said calibration by the laser sensor.
  • the laser beam is directed to the straight side of the slitter blade for increased accuracy of the blade position measurement.
  • FIGS. 1-3 show three of the top blades 23 1 , 23 2 , 23 N and bottom 24 1 , 24 2 2, 24 N slitter blade pairs used in slitting.
  • Each of the top slitter blades 23 1 , 23 2 , 23 N is attached to a top slitter blade carriage 21 1 , 21 2 , 21 N , correspondingly, which top slitter blade carriages 21 1 , 21 2 , 21 N are arranged to be movable in a cross machine direction as shown by arrows S 21 in relation to the travel direction i.e., the machine direction, of the web along an upper guide 11, and each of the bottom slitter blades 24 1 , 24 2 2, 24 N are attached to a bottom slitter blade carriage 22 1 , 22 2 , 22 N , correspondingly, which bottom slitter blade carriages 22 1 , 22 2 , 22 N are arranged to be movable in the cross machine direction as shown by arrows S 22 in relation to the travel direction of the web along a lower guide 12.
  • Actuators (not shown) are connected to the top and bottom slitter blade carriages for providing the movement of the carriages to the desired positions for s
  • each top and bottom slitter blade carriage 21 1 , 21 2 , 21 N ; 22 1 , 22 2 , 22 N is equipped with a position indicator, for example a position magnet 15 1 , 15 2 , 15 N ; 16 1 , 16 2 , 16 1N , and a position sensor, for example a magnetostrictive position sensor 13, 14, is arranged below each guide 11, 12, respectively, by means of which sensor 13, 14 the position of the respective position magnet 15 1 , 15 2 , 15 N ; 16 1 , 16 2 , 16 N is measured.
  • the principles of such an arrangement are known from US 7 086 173 B1 .
  • the sensors can also be some other sensors suitable for measuring a distance, such as inductive or pulse sensors. Also laser measurement can be applied.
  • Laser measurement for calibration is provided at the cut point of a top slitter blade, 23 1 , 23 2 , 23 N of a slitter blade pair, and the laser measurement calibration is used to calibrate the slitter blade carriage position sensors comprising the magnetostrictive position sensors 13, 14; and magnets15, 15 2 , 15 N ; 16 1 , 16 2 , 16 N .
  • the laser 30 with the beam 31 strikes one slitter blade 23 1 , 23 2 , 23 N ; of each slitter blade pair while the slitter blade pairs that are located between the slitter blade pair being measured and the laser sensor 30 are not engaged so that the laser beam 31 senses the engaged slitter blade 23 1 .
  • the positions of the slitter blades 23 1 , 23 2 , 23 N are measured one-by-one and the corresponding carriage positions are read simultaneously.
  • the laser sensor 30 is located such that a substantially straight side of the slitter blades 23 1 , 23 2 , 23 N will be sensed by the laser beam 31.
  • the shape of slitter blades is as shown in the figures and is typically such that the cutting edge is sharpened such that one side is inclined and the other side is straight and as mentioned the laser measurement system is located such that the laser beam 31 is directed to the straight side of the slitter blades 23 1 , 23 2 , 23 N thus resulting in further accuracy to the measurement.
  • top and bottom slitter blade pairs 23 2 , 23 N ; 24 2 , 24 N are unengaged and the top slitter blade 23 1 farthest from the laser 30 is calibrated by a laser measurement system including the laser 30 and the laser beam 31 which together comprise the laser sensor which sends the laser beam 31 that measures the position of the farthest top slitter blade 23, while it is positioned engaged with the corresponding bottom slitter blade 24 1 in a slitting position, i.e. contacting the bottom slitter blade.
  • the next farthest top slitter blade 23 2 is moved downwards as shown by arrow S 23 to a closed position for calibrating the second top slitter blade 23 2 , which engages to the corresponding bottom slitter blade 24 2 , as shown in FIG. 2 and after the measurement of the top slitter blade 23 2 the next top slitter blade (not shown) is measured and calibrated and correspondingly each top slitter blade is measured and calibrated until finally the last top slitter blade 23 N ,which is closest to the laser beam is engaged with the corresponding bottom slitter blade 24 N and is measured and calibrated as shown in FIG. 3 .
  • the stages of calibrating measurement by the laser measurement system comprising a laser 30 and the beam 31 it generates, can also be performed in reverse order, beginning from the closest top slitter blade 23 N engaged with the corresponding bottom slitter blade 24 N as shown in FIG. 3 which is then opened out of engagement so the next slitter blade pair (not shown) can be measured and calibrated as to its position and which is in turn opened out of engagement so the next slitter blade pair can be measured and calibrated and so on until finally the last top slitter blade 23 1 in engagement with the corresponding bottom slitter blade 24, is measured and calibrated as shown in FIG. 1 .
  • each top slitter blade is calibrated one-by-one by the laser measurement system 30, 31 and simultaneously the corresponding top and bottom slitter blade carriage 21 1 , 21 2 , 21 N ; 22 1 , 22 2 , 22 N positions are measured by the position sensor system 13; 14, 15 1 , 15 2 , 15 N ; 16 1 , 16 2 , 16 N for providing accurate information to a control system (not shown) which controls the movement of the slitter of the carriages, if needed.
  • the blade carriages 21 1 , 21 2 , 21 N ; 22 1 , 22 2 , 22 N are positioned for slitting the fiber web into the next set of partial webs with desired widths for the next set of customer rolls (partial web rolls).
  • the calibration of the positions of the slitter blades is typically needed after replacement of a slitter blade(s) or after replacement of a sensor(s) of a carriage(s) or after a power failure or a corresponding disturbance in operation. Such calibration of the positions of the slitter blades is not needed with each routine positioning of the slitter blades to the slitting position corresponding to the desired roll widths.
  • the positions of the slitter blades of a slitter-winder are calibrated using a laser to perform measurement and calibration of the fiber web cutting point of each slitter blade pair. Measurement and calibration is preformed on the top slitter blade of each of a multiplicity of slitter blade pairs one after another.
  • the laser measures one slitter blade of each slitter blade pair while they are engaged.
  • the slitter blade pairs between the laser and the slitter blade pair being measured are not engaged.
  • Carriages which support the slitter blades have position sensors which the laser measurements calibrate and the blade pair positions are measured and the carriage positions are read simultaneously.
  • the cutting edges of the slitter blades are sharpened to have straight sides and the laser measurement system is located so the laser beam is directed to the straight side.

Claims (8)

  1. Verfahren zum Kalibrieren der Position von Rollenschneidklingen (23, 24) einer Rollenschneidmaschine in einer Faserbahnherstellungslinie, in der eine Bewegung der Faserbahn durch die Rollenschneidmaschine eine Maschinenrichtung definiert und eine Maschinenquerrichtung senkrecht zu der Maschinenrichtung definiert ist,
    wobei die Rollenschneidmaschine eine Vielzahl von in Maschinenquerrichtung angeordneten Rollenschneidklingenpaaren (23, 24) hat und zumindest eine Rollenschneidklinge (23; 24) jedes Rollenschneidklingenpaars (23, 24) an einem Schlitten (21; 22) zur Aufwärtsbewegung und Abwärtsbewegung mit Bezug auf den Schlitten (21; 22) zum Ändern eines Abstands mit Bezug auf eine zweite Rollenschneidklinge (24; 23) des Rollenschneidklingenpaars (23, 24) zum Eingreifen und entsprechenden Öffnen jedes Rollenschneidklingenpaars (23, 24) montiert ist, und wobei der Schlitten (21; 22) zur Bewegung in einer Maschinenquerrichtung auf einer Führung (11; 12) der Rollenschneidmaschine zu Schneidpositionen zum Schneiden der Faserbahn in Teilbahnen in der Maschinenrichtung der Faserbahn montiert ist, wobei das Verfahren durch die Schritte gekennzeichnet ist:
    Messen in jedem Paar der Rollenschneidklingen (23, 24) mit einem Laser (30), der einen sich in Maschinenquerrichtung erstreckenden Strahl (31) hat, einer Maschinenquerrichtungsposition einer ersten Rollenschneidklinge (23), die mit einer zweiten Rollenschneidklinge (24) eingreift, die jeweils ein Paar der Vielzahl von Rollenschneidklingenpaaren (23, 24) bilden, wobei die erste Rollenschneidklinge (23) an einem ersten Schlitten (21) montiert ist, der in der Maschinenquerrichtung auf einer ersten Führung (11) in der Rollenschneidmaschine beweglich ist, und wobei die zweite Rollenschneidklinge (24) an einem zweiten Schlitten (22) montiert ist, der in der Maschinenquerrichtung auf einer zweiten Führung (12) in der Rollenschneidmaschine beweglich ist, wobei das Messen in jedem Paar der Rollenschneidklingen (23, 24) durchgeführt wird, während die Rollenschneidmaschine im Stillstand ist und keine Faserbahn läuft, und wobei Rollenschneidklingenpaare (23, 24) zwischen dem Laser und dem Paar der Rollenschneidklingen (23, 24), das gemessen wird, offen sind, um den Laserstrahl (31), der das Paar der Rollenschneidklingen (23, 24), das gemessen wird, erreichen soll, nicht zu blockieren;
    Messen einer Position jedes ersten Schlittens (21) in der Maschinenquerrichtung mit einem ersten Schlittenpositionssensor (13);
    Vergleichen der Maschinenquerrichtungsposition jeder ersten Rollenschneidklinge (23) mit der Position jedes ersten Schlittens (21) in der Maschinenquerrichtung, die mit dem ersten Schlittenpositionssensor (13) gemessen wird; und
    Kalibrieren jedes ersten Schlittenpositionssensors (13), so dass jede erste Rollenschneidklinge (23) auf der Grundlage jedes ersten Schlittenpositionssensors (13) positioniert werden kann.
  2. Verfahren nach Anspruch 1, wobei die Messschritte, der Vergleichsschritt und der Kalibrierungsschritt mit Bezug auf jedes Rollenschneidklingenpaar (23, 24) einmal zu einer Zeit ausgeführt werden.
  3. Verfahren nach Anspruch 1, wobei für jedes Rollenschneidklingenpaar (23, 24) die erste Rollenschneidklingenschlittenposition mit dem Laser gleichzeitig mit dem Messen der Maschinenquerrichtungsposition der ersten Rollenschneidklinge (23) des Rollenschneidklingenpaars (23, 24) gemessen wird.
  4. Verfahren nach Anspruch 3, wobei das Vergleichen der Maschinenquerrichtungsposition der ersten Rollenschneidklinge (23) mit der Position des ersten Rollenschneidklingenschlittens (21) gleichzeitig mit der ersten Schlittenpositionsmessung und der Messung der Maschinenquerrichtungsposition jeder ersten Rollenschneidklinge (23) ausgeführt wird; und
    wobei die Kalibrierung von jedem der ersten Schlittenpositionssensoren (13) gleichzeitig mit der ersten Schlittenpositionsmessung und der Messung der Maschinenquerrichtungsposition jeder ersten Rollenschneidklinge (23) ausgeführt wird.
  5. Verfahren nach Anspruch 1, wobei jede erste Rollenschneidklinge (23) eine gerade Seite hat und der Laserstrahl (31) zu jeder geraden Seite jeder ersten Rollenschneidklinge (23) gerichtet ist.
  6. Verfahren nach Anspruch 1, wobei die Schritte zum Messen in jedem Paar der Rollenschneidklingen (23, 24) mit dem Laser (30) der Maschinenquerrichtungsposition der ersten Rollenschneidklinge (23); Messen der Position jedes ersten Schlittens (21); Vergleichen der Maschinenquerrichtungsposition jeder ersten Rollenschneidklinge (23) mit der Position jedes ersten Schlittens (21); und Kalibrieren jedes ersten Schlittenpositionssensors (13) nach dem Austausch zumindest einer der Rollenschneidklingen (23, 24) oder nach dem Austausch zumindest eines Abstandssensors oder nach einem Stromausfall oder einer entsprechenden Störung im Betrieb der Rollenschneidmaschine ausgeführt werden.
  7. Verfahren nach Anspruch 1, wobei der Laserstrahl (31) zu einer Faserbahnschnittstelle jeder ersten Rollenschneidklinge (23) gerichtet ist.
  8. Verfahren nach Anspruch 1, wobei in jedem Paar der Rollenschneidklingen (23, 24) jede erste Rollenschneidklinge (23) oberhalb der zweiten Rollenschneidklinge (24) positioniert ist.
EP13193794.8A 2013-02-22 2013-11-21 Verfahren zur Kalibrierung der Position der Rollenschneidklingen eines Rollenschneiders Active EP2769813B1 (de)

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CN107379069B (zh) * 2017-08-16 2022-11-04 吕明芳 复合卷材自动同步往复切断机
CN108162043A (zh) * 2017-12-27 2018-06-15 宁波沸柴机器人科技有限公司 一种自动裁切工具
KR101893901B1 (ko) * 2018-06-01 2018-08-31 주식회사 에이엘텍 알루미늄 박 검품 및 절단 장치와 이의 제어 방법
EP3744476B1 (de) * 2019-05-27 2023-10-11 Summa System und verfahren zur kalibrierung von schneideplottern
CN112643740A (zh) * 2020-12-03 2021-04-13 浙江百联无纺科技有限责任公司 一种无纺布生产用分切机构
CN117681280B (zh) * 2024-02-02 2024-04-09 江苏兴广包装科技有限公司 一种高效率分条机及其工作方法

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DE3445254A1 (de) * 1984-12-12 1986-06-12 Jagenberg AG, 4000 Düsseldorf Verstelleinrichtung fuer nebeneinander angeordnete und auf gegenseitigen abstand verfahrbare bearbeitungseinheiten
DE10143508A1 (de) * 2001-09-05 2003-03-20 Biforce Anstalt Vaduz Verfahren zur Schneidspalteinstellung
FI115615B (fi) 2002-08-08 2005-06-15 Metso Paper Inc Menetelmä ja laite paperi- tai kartonkikoneen pituusleikkurin terien aseman kalibroimiseksi
EP1647377B1 (de) 2004-10-18 2007-02-21 Jurmet Sp. z o.o. Schneidemesseranordnung an einer Konfektionierungsmachine für Papier- und Folienbahnen mit lichtemittierendes Element zur Erzeugung von Markierungen, die die gewünschte Messerposition zeigen
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FI20085640A0 (fi) 2008-06-26 2008-06-26 Metso Paper Inc Menetelmä ja laite kuiturainakoneen pituusleikkurien terien aseman kalibroimiseksi

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