EP1412144B1 - Method and device for adjusting the degree of engagement of a tool with a web of material running past it - Google Patents

Method and device for adjusting the degree of engagement of a tool with a web of material running past it Download PDF

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Publication number
EP1412144B1
EP1412144B1 EP01988649A EP01988649A EP1412144B1 EP 1412144 B1 EP1412144 B1 EP 1412144B1 EP 01988649 A EP01988649 A EP 01988649A EP 01988649 A EP01988649 A EP 01988649A EP 1412144 B1 EP1412144 B1 EP 1412144B1
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EP
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Prior art keywords
tool
engagement
material web
speed
control unit
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EP01988649A
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German (de)
French (fr)
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EP1412144A1 (en
Inventor
Ingo Hahn
Christoph Müller
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Rexroth Indramat GmbH
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Rexroth Indramat GmbH
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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
    • B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/141—With means to monitor and control operation [e.g., self-regulating means]

Definitions

  • the invention relates to a method and a device for switching over the engagement distance of at least one externally radially arranged tool on an associated rotating roller into a passing material web according to the preamble of claims 1 and 4, respectively.
  • Tool-equipped rolls are used for processing hereby passing material webs, for example, as a paper cutter.
  • a paper cutter is used to cut a paper web wound on a roll by means of a knife as a tool into individual sections, which usually correspond to the standardized formats.
  • the present invention is applicable to all machines in which a time-periodic movement of a tool takes place, such as cross-saw machines, tubular bag machines and the like.
  • a paper cross cutter which consists of two oppositely arranged rollers, which are each equipped with a plurality of radially outwardly arranged blades to cut a passed between two rollers material web in predetermined sections.
  • the peripheral speed of the tool is synchronized with the speed of the web to permit cutting along a correct line.
  • the cutting of the web into different formats is also possible.
  • Switching the required for this Engagement distance of the knife-like tool takes place in that different tools are assigned to different engagement distances, which come from the stock of available tools those engaged, which bring about the desired engagement distance.
  • the control of the tool engagement takes place via hydraulic adjusting means by mechanical means.
  • a disadvantage of this switching of the engagement distance is due to the rather complicated structure of the device, which is complicated to install because of the large number of mechanical parts and is subject to wear.
  • DE 36 08 111 C1 discloses the switching of the engagement distance of a tool by electronic means.
  • the upper roll is driven by the lower roll through a gear drive for synchronizing the rotating rolls.
  • the input-side data for the control unit includes the peripheral speed of the tool determined via an incremental encoder as well as data on the speed of the material web passing through the rollers. Furthermore, a desired engagement distance of the tool, ie a desired format length can be specified. Depending on this data, the two special DC motors are controlled so that they can be brought to their full speed at standstill within a very short time, which corresponds to the respective material web speed. This speed is kept constant throughout the length of the cutting process.
  • the engine can be downshifted to a lower speed and then accelerated up to the full speed for the cutting process.
  • the motor may be accelerated to higher speeds to rotate the roller at an increased speed and to make the cut before the web has moved on to the so-called synchronous format corresponding to the circle of blades of the knives.
  • a paper cutting machine which is equipped with two cutting rollers.
  • the machine has a cam control that provides a computer-generated speed curve and a position curve for the machining cylinders. During operation, this data is permanently compared with the position data of the rolls and possible correction values are created for the processing cylinders, so that the length of the cut paper web is exactly maintained. In addition, the operator can make manipulations on the control electronics to change the desired length.
  • the invention includes the procedural teaching that for switching the engagement distance of the tool in the passing material web initially several different engagement distances predefined based on correspondingly different peripheral speeds of the tool retrievable, i. provided, after activating a switch the changeover to another predefined engagement distance during operation is performed exactly when the tool is engaged, so that with the next engagement of the tool in the material web, the new engagement distance is performed.
  • the advantage of the method according to the invention lies in particular in the fact that as a result no waste of the material web occurs which neither the preceding engagement distance is still assigned to the new intervention distance.
  • a waste-free switching of the engagement distance at full web speed can be done without a shutdown of the machine is required.
  • This is achieved by the direct provision of control data by electronic means, wherein the switching itself is controlled without waste in a favorable manner depending on the engagement situation of the tool in the material web.
  • This is realized by using the time during tool engagement to electronically switch to a new engagement distance. The synchronous operation is still maintained during the engagement of the tool, so that the new peripheral speed of the tool is effective immediately thereafter.
  • the peripheral speed of the tool to be executed for this purpose is determined such that the base movement is a uniform motion component for determining the engagement distance, which is superimposed by an accelerating or deceleration effecting compensation component in order to bring about adaptation to the web-synchronous peripheral speed during the engagement of the tool.
  • a faster uniform motion component of the roller relative to the speed of the material web are performed, whereas to achieve a longer engagement distance of the tool, a relatively slower uniform motion component of the roller is performed.
  • the method described above is carried out by means of an apparatus comprising an electronic control unit which provides the circumferential speeds representing different desired engagement distances. After activating a change-over switch, the control unit performs the changeover to another, predefined engagement distance exactly as soon as the tool is engaged.
  • a sensor which determines the corresponding desired values for controlling the rollers on the principle of a real master axis.
  • velocity data obtained according to the principle of the virtual master axis.
  • a separate, directly with the control unit in communication computer unit - preferably a PC - are provided, which calculates according to different desired engagement distances of the tool according to different cam-like peripheral speeds of the tool.
  • the software used for this purpose serves as a cam disk generation tool. It is the constant rotational movement of the virtual master axis converted into a desired time rotation of the roller. In this case, there is one area of constant peripheral speed per revolution of the roller, which coincides with the path speed for realizing a synchronous engagement in the material web. About the speed in the remaining area of the engagement distance of the tool is set in the web.
  • the data ascertained by the computer are stored directly in the drive control unit assigned to each roller together with the data of a virtual master axle gear determined via the control unit.
  • the control unit preferably has a binary input which serves as a changeover switch.
  • About the switch is a simultaneous switching between the plurality of stored in the drive control unit cam plate data with the associated Leitachsgetriebe flowers. By the simultaneous switching is achieved that in any case, the synchronization of the web speed with the peripheral speed of the tool is maintained.
  • the material web 1 consisting of paper is unwound from a unwinding device 2 at a constant web speed.
  • a Antriebsr egeliki 3 is used to achieve the constant.
  • the material web 1 enters the region of two oppositely arranged rollers 4 and 5.
  • Both rollers 4 and 5 are each equipped with externally arranged tools 6 and 7, which are designed in the manner of knives to the material web 1 in defined sections cut.
  • the cut sections are then fed to a collector device 8, in which an intermediate storage takes place.
  • a arranged in the region of the material web 1 sensor 9 is used to measure the web speed.
  • the material web speed measured by the sensor 9 is supplied to a control unit 10 on the input side.
  • the control unit 10 determines therefrom position setpoint values of a virtual master axis and passes them on to the output connected and assigned to each roller 4 and 5 drive control units 11 and 12 on.
  • a signal processing of the input Leitach position and of the leading axle gearbox takes place for the control.
  • the master axis position corresponds to the current position of the rollers, which can be determined via an incremental encoder, for example, and made available to the control.
  • the desired engagement distance in the form of a constant rotational speed for the rollers is specified via the data of the leading axle gear.
  • an angular displacement at the beginning must be taken into account in order to set the desired cutting area.
  • a cam table determines the required difference curve for accelerating or braking the rollers, so that a compensating movement between the Material web speed corresponding circumferential speed of the tool during engagement and the pitch determining peripheral speed is made possible outside the engagement of the tool.
  • the synchronicity to the material web speed can be produced - comparable to the cam disk stroke.
  • the invention is not limited to the embodiment given above. There are also conceivable modifications thereof, which nevertheless intervene in the scope defined by the claims. It is also conceivable that the invention is used in a known paper cross-cutting device, which cuts a multi-longitudinally divided material web with different engagement distances such that different paper formats are produced simultaneously in each longitudinal web, wherein the engagement distances in this case are independently switchable during operation.

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  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Replacement Of Web Rolls (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Advancing Webs (AREA)
  • Control Of Cutting Processes (AREA)
  • Shearing Machines (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Making Paper Articles (AREA)
  • Paper (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)

Abstract

The invention relates to a method for adjusting the degree of engagement of a tool ( 6, 7 ) disposed on the outer radius of at least one associated rotating roll ( 4, 5 ) with a web of material ( 1 ) running past it. The aim of the invention is to improve the method so that the degree of engagement of the tool can be adjusted without loss of time and without producing any scraps. To this end, for adjusting the degree of engagement of the tool ( 6, 7 ) with the web of material ( 1 ), first several different degrees of engagement are electronically defined by means of different peripheral speeds of the tool ( 6, 7 ) so as to be retrievable. Once an adjuster ( 13 ) is activated, the change to another defined degree of engagement takes place during operation precisely when the tool ( 6, 7 ) engages with the web so that the new degree of engagement is carried out when the tool ( 6, 7 ) engages with the web of material ( 1 ) for the next time.

Description

Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung zum Umschalten des Eingriffsabstandes mindestens eines auf einer zugeordneten rotierenden Walze außenradial angeordneten Werkzeuges in eine vorbeilaufende Materialbahn gemäß dem Oberbegriff der Ansprüche 1 bzw. 4.The invention relates to a method and a device for switching over the engagement distance of at least one externally radially arranged tool on an associated rotating roller into a passing material web according to the preamble of claims 1 and 4, respectively.

Werkzeugbestückte Walzen werden zur Bearbeitung hieran vorbeilaufender Materialbahnen beispielsweise als Papierquerschneider eingesetzt. Ein Papierquerschneider dient zum Zerschneiden einer auf einer Rolle aufgewickelten Papierbahn mittels eines Messers als Werkzeug in einzelne Abschnitte, die gewöhnlich den standardisierten Formaten entsprechen. Die vorliegende Erfindung ist bei allen Maschinen anwendbar, bei denen eine zeitlich-periodische Bewegung eines Werkzeugs erfolgt, wie beispielsweise Quersägemaschinen, Schlauchbeutelmaschinen und dergleichen.Tool-equipped rolls are used for processing hereby passing material webs, for example, as a paper cutter. A paper cutter is used to cut a paper web wound on a roll by means of a knife as a tool into individual sections, which usually correspond to the standardized formats. The present invention is applicable to all machines in which a time-periodic movement of a tool takes place, such as cross-saw machines, tubular bag machines and the like.

Aus der US 5,662,018 ist ein Papierquerschneider bekannt, der aus zwei gegenüberliegend angeordneten Walzen besteht, die je mit mehreren außenradial angeordneten Messern bestückt sind, um eine zwischen beiden Walzen hindurchgeführte Materialbahn in vorgegebene Abschnitte zu zerschneiden. Während des Eingriffs der Werkzeuge in die Materialbahn wird die Umfangsgeschwindigkeit des Werkzeugs mit der Geschwindigkeit der Materialbahn synchronisiert, um das Zerschneiden entlang einer korrekten Linie zu ermöglichen. Mit dieser Vorrichtung ist auch das Zerschneiden der Materialbahn in verschiedene Formate möglich. Ein Umschalten des hierfür erforderlichen Eingriffsabstandes des messerartigen Werkzeuges erfolgt dadurch, dass verschiedene Werkzeuge unterschiedlichen Eingriffsabständen zugeordnet sind, wobei aus dem Vorrat der zur Verfügung stehenden Werkzeuge diejenigen in Eingriff kommen, die den gewünschten Eingriffsabstand herbeiführen. Die Steuerung des Werkzeugeingriffs erfolgt dabei über hydraulische Verstellmittel auf mechanischem Wege. Ein Nachteil dieser Umschaltung des Eingriffsabstandes liegt in dem recht komplizierten Aufbau der Vorrichtung begründet, die wegen der Vielzahl an mechanischen Einzelteilen aufwendig in der Montage ist und einem Verschleiß unterliegt.From US 5,662,018 a paper cross cutter is known, which consists of two oppositely arranged rollers, which are each equipped with a plurality of radially outwardly arranged blades to cut a passed between two rollers material web in predetermined sections. During the engagement of the tools in the web, the peripheral speed of the tool is synchronized with the speed of the web to permit cutting along a correct line. With this device, the cutting of the web into different formats is also possible. Switching the required for this Engagement distance of the knife-like tool takes place in that different tools are assigned to different engagement distances, which come from the stock of available tools those engaged, which bring about the desired engagement distance. The control of the tool engagement takes place via hydraulic adjusting means by mechanical means. A disadvantage of this switching of the engagement distance is due to the rather complicated structure of the device, which is complicated to install because of the large number of mechanical parts and is subject to wear.

Demgegenüber offenbart die DE 36 08 111 C1 die Umschaltung des Eingriffsabstandes eines Werkzeugs auf elektronischem Wege. Der Antrieb von zwei gegenüberliegend angeordneten und mit je einem Messer als Werkzeug versehenen Walzen erfolgt durch jeweils zugeordnete Elektromotoren in direkter Weise. Die obere Walze wird mit der unteren Walze durch einen Zahnradtrieb zum Synchronisieren der rotierenden Walzen angetrieben.In contrast, DE 36 08 111 C1 discloses the switching of the engagement distance of a tool by electronic means. The drive of two oppositely arranged and each provided with a knife as a tool rolls done by each associated electric motors in a direct manner. The upper roll is driven by the lower roll through a gear drive for synchronizing the rotating rolls.

Als Elektromotoren kommen Spezialgleichstrommotoren zum Einsatz, die von einer gemeinsamen elektronischen Steuerungseinheit in Abhängigkeit von verschiedenen Eingangsdaten diskontinuierlich, d.h. nach Art einer kurvenscheibenartigen Steuerung, angetrieben werden. Zu den eingangsseitigen Daten für die Steuerungseinheit, gehört die über einen Inkrementalgeber ermittelte Umfangsgeschwindigkeit des Werkzeugs sowie Daten über die Geschwindigkeit der durch die Walzen laufenden Materialbahn. Weiterhin ist ein gewünschter Eingriffsabstand des Werkzeugs, d.h. eine gewünschte Formatlänge vorgebbar. In Abhängigkeit von diesen Daten werden die beiden Spezialgleichstrommotoren so gesteuert, dass sie bei Stillstand innerhalb kürzester Zeit auf ihre volle Drehzahl gebracht werden können, die der jeweiligen Materialbahngeschwindigkeit entspricht. Diese Geschwindigkeit wird während der gesamten Länge des Schneidvorganges konstant gehalten. Je nach gewünschter Formattänge kann der Motor auf eine niedrigere Geschwindigkeit heruntergeregelt und dann zum Schnittvorgang wieder auf die volle Geschwindigkeit hochbeschleunigt werden. Für kleinere Formate kann der Motor nach Durchlauf der Schnittgeschwindigkeit auf höhere Geschwindigkeiten beschleunigt werden, um die Walze mit erhöhter Geschwindigkeit zu drehen und den Schnirt durchzuführen, bevor die Materialbahn sich um das so genannte Synchronformat, das dem Flugkreisumiang der Messer entspricht, weiterbewegt hat.As electric motors special DC motors are used, which are discontinuous, ie in the manner of a cam-like control, driven by a common electronic control unit in response to various input data. The input-side data for the control unit includes the peripheral speed of the tool determined via an incremental encoder as well as data on the speed of the material web passing through the rollers. Furthermore, a desired engagement distance of the tool, ie a desired format length can be specified. Depending on this data, the two special DC motors are controlled so that they can be brought to their full speed at standstill within a very short time, which corresponds to the respective material web speed. This speed is kept constant throughout the length of the cutting process. Depending on the desired formattance, the engine can be downshifted to a lower speed and then accelerated up to the full speed for the cutting process. For smaller formats, after passing through the cutting speed, the motor may be accelerated to higher speeds to rotate the roller at an increased speed and to make the cut before the web has moved on to the so-called synchronous format corresponding to the circle of blades of the knives.

Aus der EP-A-0 035 462 ist eine Papierschneidmaschine bekannt, die mit zwei Schneidwalzen ausgerüstet ist. Die Maschine verfügt über eine Kurvensteuerung die eine Computergenerierte Geschwindigkeitskurve und eine Positionskurve für die Bearbeitungszylinder vorgibt. Während des Betriebes werden diese Daten permanent mit den Positionsdaten der Walzen verglichen und eventuelle Korrekturwerte für die Bearbeitungszylinder erstellt, damit die Länge der geschnittenen Papierbahn genau eingehalten wird. Zusätzlich kann der Bediener über Bedienelemente Eingriffe in die Steuerelektronik vornehmen, um die gewünschte Länge zu verändern.From EP-A-0 035 462 a paper cutting machine is known, which is equipped with two cutting rollers. The machine has a cam control that provides a computer-generated speed curve and a position curve for the machining cylinders. During operation, this data is permanently compared with the position data of the rolls and possible correction values are created for the processing cylinders, so that the length of the cut paper web is exactly maintained. In addition, the operator can make manipulations on the control electronics to change the desired length.

Bei dem vorstehend beschriebenen bekannten Verfahren zur Bestimmung des Eingriffsabstandes von auf rotierenden Walzen außenradial angeordneten Messern in eine vorbeilaufende Materialbahn tritt das Problem auf, dass ein Umschalten des Eingriffsabstandes, d.h. eine Änderung der Formatlänge, während des Betriebes zwar möglich ist; hierbei jedoch ein Verschnitt während des Zeitfensters der Umschaltung der Formatlänge entsteht. Um keinen derartigen Verschnitt entstehen zu lassen war es bisher üblich, die Maschine zum Umschalten des Eingriffsabstandes zunächst außer Betrieb zu setzen, dann ein Einrichten der Maschine auf den neuen Eingriffsabstand vorzunehmen und anschließend die Maschine wieder in Betrieb zu setzen. Diese Vorgehensweise verursacht andererseits jedoch einen hohen, in der Massenproduktion nachteiligen, Zeitaufwand und Verschnitt während des Hochlaufens bzw. Bremsvorganges.In the known method described above for determining the engagement distance of externally arranged on rotating rolls knives in a passing material web, the problem arises that a switching of the engagement distance, i. a change in format length, while possible while operating; Here, however, a waste during the time window of switching the format length arises. In order not to create such a waste, it has hitherto been customary to first disable the machine for switching over the engagement distance, then to set up the machine to the new engagement distance and then to put the machine back into operation. On the other hand, however, this procedure causes a high expenditure of time and waste, which is disadvantageous in terms of mass production, during acceleration or braking.

Es ist daher die Aufgabe der vorliegenden Erfindung, das gattungsgemäße Verfahren sowie die diesbezügliche Vorrichtung dahingehend weiter zu verbessern, dass ohne Zeitverlust ein verschnittfreies Umschalten des Eingriffsabstandes des Werkzeugs möglich ist.It is therefore an object of the present invention to further improve the generic method and the relevant device to the effect that a waste-free switching of the engagement distance of the tool is possible without loss of time.

Die Aufgabe wird ausgehend von einem Verfahren gemäß dem Oberbegriff des Anspruchs 1 in Verbindung mit dessen kennzeichnenden Merkmalen gelöst. Vorrichtungsgemäß wird das Verfahren wie in Anspruch 4 angegeben gelöst. Die jeweils rückbezogenen abhängigen Ansprüche geben vorteilhafte Weiterbildungen der Erfindung wieder.The object is achieved on the basis of a method according to the preamble of claim 1 in conjunction with its characterizing features. According to the device, the method as stated in claim 4 is achieved. The respective dependent dependent claims give advantageous developments of the invention again.

Die Erfindung schließt die verfahrenstechnische Lehre ein, dass zum Umschalten des Eingriffsabstandes des Werkzeugs in die vorbeilaufende Materialbahn zunächst mehrere unterschiedliche Eingriffsabstände anhand entsprechend unterschiedlicher Umfangsgeschwindigkeiten des Werkzeugs abrufbar vordefiniert, d.h. bereitgestellt, werden, wobei nach Aktivieren eines Umschalters der Wechsel zu einem anderen vordefinierten Eingriffsabstand während des Betriebes genau dann durchgeführt wird, sobald sich das Werkzeug im Eingriff befindet, so dass mit dem nächsten Eingriff des Werkzeugs in die Materialbahn der neue Eingriffsabstand ausgeführt wird.The invention includes the procedural teaching that for switching the engagement distance of the tool in the passing material web initially several different engagement distances predefined based on correspondingly different peripheral speeds of the tool retrievable, i. provided, after activating a switch the changeover to another predefined engagement distance during operation is performed exactly when the tool is engaged, so that with the next engagement of the tool in the material web, the new engagement distance is performed.

Der Vorteil des erfindungsgemäßen Verfahrens liegt insbesondere darin, dass hierdurch kein Verschnitt der Materialbahn auftritt, der weder dem vorhergehenden Eingriffsabstand noch dem neuen Eingriffsabstand zuzuordnen ist. Somit kann durch das erfindungsgemäße Verfahren ein verschnittfreies Umschalten des Eingriffsabstandes bei voller Bahngeschwindigkeit erfolgen, ohne dass ein Abschalten der Maschine erforderlich ist. Dieses wird durch die unmittelbare Bereitstellung von Ansteuerdaten auf elektronischem Wege erzielt, wobei das Umschalten selbst in günstiger Weise in Abhängigkeit von der Eingriffssituation des Werkzeuges in die Materialbahn verschnittfrei gesteuert wird. Dies wird dadurch realisiert, dass die Zeit während des Eingriffs des Werkzeugs dafür genutzt wird, auf einen neuen Eingriffsabstand elektronisch umzuschalten. Der Synchronlauf bleibt während des Eingriffs des Werkzeugs noch erhalten, so dass die neue Umfangsgeschwindigkeit des Werkzeuges unmittelbar danach wirksam wird.The advantage of the method according to the invention lies in particular in the fact that as a result no waste of the material web occurs which neither the preceding engagement distance is still assigned to the new intervention distance. Thus, by the method according to the invention a waste-free switching of the engagement distance at full web speed can be done without a shutdown of the machine is required. This is achieved by the direct provision of control data by electronic means, wherein the switching itself is controlled without waste in a favorable manner depending on the engagement situation of the tool in the material web. This is realized by using the time during tool engagement to electronically switch to a new engagement distance. The synchronous operation is still maintained during the engagement of the tool, so that the new peripheral speed of the tool is effective immediately thereafter.

Vorzugsweise wird die hierfür auszuführende Umfangsgeschwindigkeit des Werkzeuges derart festgelegt, dass als Grundbewegung ein gleichförmiger Bewegungsanteil zur Festlegung des Eingriffsabstandes ausgeführt wird, der von einem ein Beschleunigen oder Abbremsen bewirkenden Ausgleichsanteil überlagert wird, um eine Anpassung an die materialbahnsynchrone Umfangsgeschwindigkeit während des Eingriffs des Werkzeugs herbeizuführen. Dabei kann zur Erzielung eines kürzeren Eingrififsabstandes des Werkzeugs ein schnellerer gleichförmiger Bewegungsanteil der Walze relativ zur Geschwindigkeit der Materialbahn ausgeführt werden, wogegen zur Erzielung eines längeren Eingriffsabstandes des Werkzeugs ein relativ verlangsamter gleichförmiger Bewegungsanteil der Walze ausgeführt wird.Preferably, the peripheral speed of the tool to be executed for this purpose is determined such that the base movement is a uniform motion component for determining the engagement distance, which is superimposed by an accelerating or deceleration effecting compensation component in order to bring about adaptation to the web-synchronous peripheral speed during the engagement of the tool. In this case, to achieve a shorter Einrififsabstandes of the tool, a faster uniform motion component of the roller relative to the speed of the material web are performed, whereas to achieve a longer engagement distance of the tool, a relatively slower uniform motion component of the roller is performed.

Das vorstehend beschriebene Verfahren wird mittels einer Vorrichtung ausgeführt, die eine elektronische Steuerungseinheit umfasst, welche die unterschiedlichen gewünschten Eingriffsabstände repräsentierenden Umfangsgeschwindigkeiten abrufbar bereitstellt. Die Steuerungseinheit führt nach Aktivieren eines Umschalters den Wechsel zu einem anderen, vordefinierten Eingriffsabstand genau dann durch, sobald sich das Werkzeug im Eingriff befindet.The method described above is carried out by means of an apparatus comprising an electronic control unit which provides the circumferential speeds representing different desired engagement distances. After activating a change-over switch, the control unit performs the changeover to another, predefined engagement distance exactly as soon as the tool is engaged.

Zur Messung der hierfür benötigten Geschwindigkeitsdaten der Materialbahn ist ein Sensor vorgesehen, der zur Ansteuerung der Walzen nach dem Prinzip einer realen Leitachse die entsprechenden Sollwerte ermittelt. Daneben ist es auch möglich Geschwindigkeitsdaten zu verwenden, die nach dem Prinzip der virtuellen Leitachse gewonnen werden. Vorteilhafterweise werden diese Sollwerte einer jeder Walze zugeordneten Antriebsriegeleinheit zur Verfügung gestellt, worüber die zugeordnete Walze direkt lagegeregelt ansteuerbar ist.To measure the speed data of the material web required for this purpose, a sensor is provided which determines the corresponding desired values for controlling the rollers on the principle of a real master axis. In addition, it is also possible to use velocity data obtained according to the principle of the virtual master axis. Advantageously, these nominal values of each roll associated drive bolt unit provided, about which the associated roller is directly controlled position controlled.

Weiterhin kann eine separate, direkt mit der Steuerungseinheit in Verbindung stehende Rechnereinheit - vorzugsweise ein PC - vorgesehen werden, welche ausgehend von unterschiedlich gewünschten Eingriffsabständen des Werkzeuges entsprechend unterschiedliche kurvenscheibenartige Umfangsgeschwindigkeiten des Werkzeugs berechnet. Die hierfür eingesetzte Software dient insoweit ais Kurvenscheibengenerierungswerkzeug. Es wird die konstante Drehbewegung der virtuellen Leitachse in eine zeitlich gewünschte Drehbewegung der Walze umgewandelt. Hierbei existiert pro Umdrehung der Walze ein Bereich konstanter Umfangsgeschwindigkeit, die zur Realisierung eines synchronen Eingriffs in die Materialbahn mit der Bahngeschwindigkeit übereinstimmt. Über die Geschwindigkeit im übrigen Bereich wird der Eingriffsabstand des Werkzeuges in die Materialbahn festgelegt.Furthermore, a separate, directly with the control unit in communication computer unit - preferably a PC - are provided, which calculates according to different desired engagement distances of the tool according to different cam-like peripheral speeds of the tool. The software used for this purpose serves as a cam disk generation tool. It is the constant rotational movement of the virtual master axis converted into a desired time rotation of the roller. In this case, there is one area of constant peripheral speed per revolution of the roller, which coincides with the path speed for realizing a synchronous engagement in the material web. About the speed in the remaining area of the engagement distance of the tool is set in the web.

Gemäß einer weiteren, die erfindungsgemäße Vorrichtung verbessernden Maßnahme sind die vom Rechner ermittelten Daten gemeinsam mit den über die Steuerungseinheit ermittelten Daten eines virtuellen Leitachsgetriebes direkt in der jeder Walze zugeordneten Antriebsregeleinheit abgespeichert. Vorzugsweise verfügt die Steuerungseinheit über einen binären Eingang, der als Umschalter dient. Über den Umschalter erfolgt ein zeitgleiches Umschalten zwischen den mehreren in der Antriebsregeleinheit hinterlegten kurvenscheibenartigen Daten mit den zugeordneten Leitachsgetriebedaten. Durch das zeitgleiche Umschalten wird erreicht, dass in jedem Fall die Synchronisation der Bahngeschwindigkeit mit der Umfangsgeschwindigkeit des Werkzeuges erhalten bleibt.According to a further measure improving the device according to the invention, the data ascertained by the computer are stored directly in the drive control unit assigned to each roller together with the data of a virtual master axle gear determined via the control unit. The control unit preferably has a binary input which serves as a changeover switch. About the switch is a simultaneous switching between the plurality of stored in the drive control unit cam plate data with the associated Leitachsgetriebedaten. By the simultaneous switching is achieved that in any case, the synchronization of the web speed with the peripheral speed of the tool is maintained.

Weitere die Erfindung verbessernde Maßnahmen werden nachstehend gemeinsam mit der Beschreibung eines bevorzugten Ausführungsbeispiels der Erfindung anhand der Figuren näher dargestellt. Es zeigt:

Figur 1
eine blockschaftbildartige Darstellung einer erfindungsgemäßen Vorrichtung, die nach Art eines Papierquerschneiders ausgebildet ist, und
Figur 2
eine Signalflussdarstellung der Ansteuerung der rotierenden Walzen.
Further measures improving the invention will be described in more detail below together with the description of a preferred embodiment of the invention with reference to FIGS. It shows:
FIG. 1
a block-like image of a device according to the invention, which is designed in the manner of a paper cutter, and
FIG. 2
a signal flow representation of the control of the rotating rollers.

Gemäß Figur 1 wird die aus Papier bestehende Materialbahn 1 ausgehend von einer Abwickeleinrichtung 2 mit konstanter Bahngeschwindigkeit abgewickelt. Zur Erzielung der konstanten, von einer virtuellen Leitachse abgeleiteten Geschwindigkeit der tvlaterialbahn 1 wird eine Antriebsr egeleinheit 3 eingesetzt. Nach Abwicklung gelangt die Materialbahn 1 in den Bereich von zwei gegenüberliegend angeordneten Walzen 4 und 5. Beide Walzen 4 und 5 sind je mit außenradial angeordneten Werkzeugen 6 und 7 ausgestattet, die nach Art von Messern ausgebildet sind, um die Materialbahn 1 in definierte Abschnitte zu zerschneiden. Die geschnittenen Abschnitte werden anschließend einer Sammlereinrichtung 8 zugeführt, worin eine Zwischenlagerung erfolgt. Ein im Bereich der Materialbahn 1 angeordneter Sensor 9 dient der Messung der Materialbahngeschwindigkeit. Die durch den Sensor 9 gemessene Materialbahngeschwindigkeit wird einer Steuerungseinheit 10 eingangsseitig zugeführt. Die Steuerungseinheit 10 ermittelt hieraus Lagesollwerte einer virtuellen Leitachse und gibt diese an ausgangsseitig angeschlossene und jeder Walze 4 und 5 zugeordnete Antriebsregeleinheiten 11 und 12 weiter. Über eine ebenfalls mit der Steuerungseinheit 10 in Verbindung stehenden Rechnereinheit 14 werden nach dem Prinzip einer Kurvenscheibentabelle diejenigen Daten erstellt, die von der Steuerungseinheit 10 gemeinsam mit den Daten des zugeordneten Leitachsgetriebes in die Antriebsregeleinheiten 11 und 12 der beiden Walzen 4 und 5 geladen werden.According to FIG. 1, the material web 1 consisting of paper is unwound from a unwinding device 2 at a constant web speed. To achieve the constant, derived from a virtual master axis speed of the tvlaterialbahn 1 a Antriebsr egeleinheit 3 is used. After settlement, the material web 1 enters the region of two oppositely arranged rollers 4 and 5. Both rollers 4 and 5 are each equipped with externally arranged tools 6 and 7, which are designed in the manner of knives to the material web 1 in defined sections cut. The cut sections are then fed to a collector device 8, in which an intermediate storage takes place. A arranged in the region of the material web 1 sensor 9 is used to measure the web speed. The material web speed measured by the sensor 9 is supplied to a control unit 10 on the input side. The control unit 10 determines therefrom position setpoint values of a virtual master axis and passes them on to the output connected and assigned to each roller 4 and 5 drive control units 11 and 12 on. Via a computer unit 14 likewise connected to the control unit 10, those data are created on the principle of a cam table which are loaded by the control unit 10 together with the data of the associated master axle into the drive control units 11 and 12 of the two rollers 4 and 5.

Über einen der Steuerungseinheit 10 eingangsseitig zugeordneten Umschalter 13 wird mittels der Steuerungseinheit 10 ein Wechsel von dem aktuellen Eingriffsabstand der beiden Werkzeuge 6 und 7 zu einem anderen Eingriffsabstand durchgeführt, sobald sich das Werkzeug 6, 7 im Eingriff befindet.About a control unit 10 on the input side associated switch 13, a change from the current engagement distance of the two tools 6 and 7 is carried out to another engagement distance by the control unit 10 as soon as the tool 6, 7 is engaged.

Gemäß Figur 2 erfolgt zur Ansteuerung eine Signalverarbeitung der eingangsseitig vorgegebenen Leitachsposition sowie des Leitachsgetriebes. Die Leitachsposition entspricht der aktuellen Position der Walzen, welche beispielsweise über einen Inkrementalgeber ermittelt und der Ansteuerung zur Verfügung gestellt werden können. Über die Daten des Leitachsgetriebes wird der gewünschte Eingriffsabstand in Form einer konstanten Drehgeschwindigkeit für die Walzen vorgegeben. Weiterhin ist aufgrund der Schrägstellung der Messer eine Winkelverschiebung am Anfang zu berücksichtigen, um den gewünschten Schnittbereich einzustellen. Nachfolgend bestimmt eine Kurvenscheibentabelle die erforderliche Differenzkurve zum Beschleunigen oder Bremsen der Walzen, so dass eine Ausgleichsbewegung zwischen der der Materialbahngeschwindigkeit entsprechenden Umfangsgeschwindigkeit des Werkzeugs während des Eingriffs und der den Eingrirfsabstand bestimmenden Umfangsgeschwindigkeit außerhalb des Eingriffs des Werkzeuges ermöglicht wird. Über eine Änderung der Amplitude der Differenzkurve ist - vergleichbar mit dem Kurvenscheibenhub - die Synchrcnität zur Materialbahngeschwindigkeit herstellbar. Über einen zusätzlichen Multiplikator 1/Nutzen ist eine steuerungstechnische Anpassung der Werkzeuganzahl pro Walze möglich.According to FIG. 2, a signal processing of the input Leitach position and of the leading axle gearbox takes place for the control. The master axis position corresponds to the current position of the rollers, which can be determined via an incremental encoder, for example, and made available to the control. The desired engagement distance in the form of a constant rotational speed for the rollers is specified via the data of the leading axle gear. Furthermore, due to the inclination of the knife, an angular displacement at the beginning must be taken into account in order to set the desired cutting area. Subsequently, a cam table determines the required difference curve for accelerating or braking the rollers, so that a compensating movement between the Material web speed corresponding circumferential speed of the tool during engagement and the pitch determining peripheral speed is made possible outside the engagement of the tool. By means of a change in the amplitude of the difference curve, the synchronicity to the material web speed can be produced - comparable to the cam disk stroke. By means of an additional multiplier 1 / benefit, it is possible to adjust the number of tools per roller in terms of control technology.

Die Erfindung ist nicht beschränkt auf das vorstehend angegebene Ausführungsbeispiel. Es sind auch Abwandlungen hiervon denkbar, die dennoch in den durch die Ansprüche definierten Schutzbereich eingreifen. Es ist auch denkbar, dass die Erfindung bei einer bekannten Papierquerschneidereinrichtung eingesetzt wird, die eine mehrfach längsgeteilte Materialbahn mit unterschiedlichen Eingriffsabständen derart schneidet, dass in jeder Längsbahn gleichzeitig unterschiedliche Papierformate produziert werden, wobei die Eingriffsabstände hierbei während des Betriebes unabhängig voneinander umschaltbar sind.The invention is not limited to the embodiment given above. There are also conceivable modifications thereof, which nevertheless intervene in the scope defined by the claims. It is also conceivable that the invention is used in a known paper cross-cutting device, which cuts a multi-longitudinally divided material web with different engagement distances such that different paper formats are produced simultaneously in each longitudinal web, wherein the engagement distances in this case are independently switchable during operation.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Materialbahnweb
22
AbwickelreinrichtungAbwickelreinrichtung
33
AntriebsregeleinheitDrive control unit
44
Walzeroller
55
Walzeroller
66
WerkzeugTool
77
WerkzeugTool
88th
Sammlereinheitcollector unit
99
Sensorsensor
1010
Steuerungseinheitcontrol unit
1111
AntriebsregeleinheitDrive control unit
1212
AntriebsregeleinheitDrive control unit
1313
Umschalterswitch
1414
Rechnereinheitcomputer unit

Claims (10)

  1. Method for switching over the engagement distance of a tool (6, 7) into a material web (1) which is running past, which tool (6, 7) is arranged radially on the outside on at least one associated rotating roll (4, 5), the said material web (1) being moved in a straight line at a constant speed, the circumferential speed of the tool (6, 7) being synchronized with the speed of the material web (1) in the manner of a cam-disc control means, during the duration of the engagement of the tool (6, 7) into the material web (1), and the desired engagement distance being fixed by an increased or reduced circumferential speed of the roll (4, 5) during the remaining duration, characterized
    - in that initially a plurality of different engagement distances are predefined electronically for the switching over of the engagement distance of the tool (6, 7) into the material web (1) in a manner which can be called up using correspondingly different circumferential speeds of the tool (6, 7),
    - the change to another predefined engagement distance being carried out, after activation of a changeover switch (13), during operation exactly as soon as the tool (6, 7) is in engagement, with the result that the new engagement distance is carried out with the next engagement of the tool (6, 7) into the material web (1).
  2. Method according to Claim 1, characterized in that the engagement distance is fixed by the circumferential speed of the tool (6, 7) in such a way that, as a basic movement, a uniform movement component is carried out for fixing the engagement distance which is superimposed by a compensating-movement component which brings about acceleration or braking, in order to bring about adaptation to the circumferential speed, which is synchronous with the material web, during the engagement of the tool (6, 7).
  3. Method according to Claim 2, characterized in that, in order to achieve a shorter engagement distance of the tool (6, 7), a quicker uniform movement component of the roll (4, 5) is carried out relative to the speed of the material web (1), whereas, in order to achieve a longer engagement distance of the tool (6, 7), a relatively decelerated uniform movement component of the roll (4, 5) is carried out.
  4. Apparatus for switching over the engagement distance of the tool (6, 7) into the material web (1) which is running past and moves in a straight line at a constant speed, which tool (6, 7) is arranged radially on the outside on at least one associated rotating roll (4, 5), having an electronic control unit (10) which, in a manner of a cam-disc control means, synchronizes the circumferential speed of the tool (6, 7) with the speed of the material web (1) during the duration of the engagement of the tool (6, 7) into the material web (1), the desired engagement distance being fixed during the remaining duration by setting an increased or reduced circumferential speed of the roll (4, 5), characterized
    - in that the electronic control unit (10) provides, in a manner which can be called up, different circumferential speeds which represent desired engagement distances,
    - the change to another, predefined engagement distance being carried out according to the requirement of the control unit (10), after the activation of a changeover switch (13), exactly as soon as the tool (6, 7) is in engagement, in order to carry out the new engagement distance with the next engagement of the tool (6, 7).
  5. Apparatus according to Claim 4, characterized in that a sensor (9) is provided for measuring the speed of the material web (1), which sensor (9) is connected to the input side of the control unit (10) which calculates from this the setpoint values which are required for the control principle of the real leading axle.
  6. Apparatus according to Claim 4, characterized in that electronically calculated speed data for the speed of the material web (1) are supplied to the input side of the control unit (10) which calculates from this setpoint values which are required for the control principle of the virtual leading axle.
  7. Apparatus according to Claim 5 or 6, characterized in that the control unit (10) makes the determined setpoint values available for the leading axle of a drive regulating unit (11, 12) which is assigned to every roll (4, 5), via which the associated roll (4, 5) can be actuated in a position-regulated manner.
  8. Apparatus according to Claim 4, characterized in that a computing unit (14) is provided which is connected to the control unit (10) and, starting from different desired engagement distances of the tool (6, 7), determines correspondingly different cam-disc-like circumferential speeds of the tool (6, 7) electronically.
  9. Apparatus according to Claim 8, characterized in that the data which is determined by the computing unit (14) is stored jointly with the data, which is determined via the control unit (10), of the virtual leading-axle gear mechanism directly in the drive regulating unit (11, 12) which is assigned to every roll (4, 5).
  10. Apparatus according to Claim 4, characterized in that the control unit (10) has a binary input as a changeover switch (13), via which the changeover takes place between a plurality of cam-disc-like data which is stored in the drive regulating unit (11, 12) with the associated data for the leading-axle gear mechanism.
EP01988649A 2000-10-26 2001-10-26 Method and device for adjusting the degree of engagement of a tool with a web of material running past it Expired - Lifetime EP1412144B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10053247A DE10053247A1 (en) 2000-10-26 2000-10-26 Method and device for switching the engagement distance of a tool in a passing material web
DE10053247 2000-10-26
PCT/DE2001/004026 WO2002034484A1 (en) 2000-10-26 2001-10-26 Method and device for adjusting the degree of engagement of a tool with a web of material running past it

Publications (2)

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EP1412144A1 EP1412144A1 (en) 2004-04-28
EP1412144B1 true EP1412144B1 (en) 2006-06-14

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EP01988649A Expired - Lifetime EP1412144B1 (en) 2000-10-26 2001-10-26 Method and device for adjusting the degree of engagement of a tool with a web of material running past it

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EP (1) EP1412144B1 (en)
JP (1) JP2004512188A (en)
AT (1) ATE329735T1 (en)
AU (1) AU2002220507A1 (en)
CA (1) CA2426971C (en)
DE (3) DE10053247A1 (en)
DK (1) DK1412144T3 (en)
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WO (1) WO2002034484A1 (en)

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DE102007034834A1 (en) * 2007-07-26 2009-01-29 Robert Bosch Gmbh Method and device for optimizing cross-processing operations
HUE061135T2 (en) * 2017-02-21 2023-05-28 Manz Italy Srl Machining apparatus and method

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JP2004512188A (en) 2004-04-22
ATE329735T1 (en) 2006-07-15
DK1412144T3 (en) 2006-10-16
US7089078B2 (en) 2006-08-08
EP1412144A1 (en) 2004-04-28
CA2426971A1 (en) 2002-05-02
AU2002220507A1 (en) 2002-05-06
WO2002034484A1 (en) 2002-05-02
DE50110192D1 (en) 2006-07-27
ES2266294T3 (en) 2007-03-01
DE10053247A1 (en) 2002-05-29
DE10194647D2 (en) 2003-11-06
US20040059457A1 (en) 2004-03-25
CA2426971C (en) 2006-10-03

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