EP3210681B1 - Device and method for rolling a strip of material with variable thickness - Google Patents

Device and method for rolling a strip of material with variable thickness Download PDF

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Publication number
EP3210681B1
EP3210681B1 EP17155391.0A EP17155391A EP3210681B1 EP 3210681 B1 EP3210681 B1 EP 3210681B1 EP 17155391 A EP17155391 A EP 17155391A EP 3210681 B1 EP3210681 B1 EP 3210681B1
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EP
European Patent Office
Prior art keywords
roller
rollers
strip
immersion
strip material
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EP17155391.0A
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German (de)
French (fr)
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EP3210681A1 (en
Inventor
Ingolf Günter Müller
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Tilgert Walzwerksmaschinenbau GmbH
Bilstein GmbH and Co KG
Original Assignee
Tilgert Walzwerksmaschinenbau GmbH
Bilstein GmbH and Co KG
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Publication of EP3210681A1 publication Critical patent/EP3210681A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/10—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-gap, e.g. pass indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • B21B37/26—Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control
    • B21B37/50—Tension control; Compression control by looper control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control
    • B21B37/52—Tension control; Compression control by drive motor control
    • B21B37/54—Tension control; Compression control by drive motor control including coiler drive control, e.g. reversing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/04—Thickness, gauge
    • B21B2261/05—Different constant thicknesses in one rolled product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/02—Tension
    • B21B2265/08—Back or outlet tension

Definitions

  • the invention relates to a device for rolling strip material with a periodically variable strip thickness, the device comprising a roll stand with a set of rollers and a setting system for adjusting the roll gap of the set of rolls, to which roll gap the strip material with an initial thickness is fed on the input side from a decoiler and from which from the strip material with the desired final thickness is fed to a reel on the output side.
  • the invention relates to a method for operating a device for rolling strip material with a periodically variable strip thickness, the device having a roll stand with a roller set and an adjustment system for adjusting the roll gap of the roll set, the strip material having an initial thickness on the input side of the roll gap Decoiler is supplied and from which the strip material with the desired, through which Roll gap certain end thickness is fed to a reel on the output side.
  • a device of the generic type and a method of a generic type are known in the prior art.
  • strip materials made of steel strip material are usually processed.
  • the prior art shows a possibility with which metal strips wound into coils in an economical manner can be unwound under tension, reduced in thickness and then rewound under tension, with a relatively constant strip thickness being provided on the inlet side and periodically variable strip thickness is to be achieved on the outlet side.
  • the speed control of the reels is also complex and can also lead to errors when operating the corresponding device.
  • the object of the invention is to provide an alternative solution for a corresponding device or a corresponding method which does not have any of the features of the force control of a compensating or dancer roll and a speed control of the reels Makes use of and which, in adaptation to the high strip throughput speeds, enables a faster automatic adjustment of the roll gap and thus a high quality of a periodically variable strip material to be achieved, taking into account the different strip speeds at the entry and exit of the roll gap.
  • the invention proposes that a roller arrangement with an immersion roller around which the strip material is guided is arranged both between the uncoiler and the roll stand and between the roll stand and the reel, and that the immersion rollers at a constant roller speed of the roll gap determining rolls of the roll stand depending on the position of the Rollers are position-controlled in order to compensate for the speed changes of the rolling stock at the inlet and at the outlet of the roll stand, and that the decoiler and the coiler are operated with tension control, and that a machine control is provided which detects the position of the rolls for a predeterminable roll gap and by means of which the Submersible rollers can be position-controlled depending on this.
  • the immersion rollers are position-controlled directly by the setting of the roll gap, which as a result leads to a significantly faster correct setting with changing roll gaps and to an exact rolling result.
  • both the decoiler and the coiler are operated with tension control, which is particularly advantageous for the use of the device.
  • a support roller for the strip material over which the strip material is guided is arranged in front of each dip roller and behind each dip roller, and that each support roller has a strip length detection device and / or a strip speed monitoring device.
  • the decoiler and the decoiler are provided with a tension measuring device, by means of which the current supply to the drive motors of the reels can be regulated.
  • the rolls of the roll stand that determine the roll gap rotate at a constant roll speed.
  • a method according to the invention is characterized in that a roller arrangement with an immersion roller which is adjustable transversely to the direction of travel of the strip material and around which the strip material is guided is arranged both between the uncoiler and the roll stand and also between the roll stand and the reel, the immersion rollers depending on the position of the rolls of the roll stand are position-controlled so that changes in speed compensate for changes in speed of the rolling stock at the inlet and at the outlet of the roll stand, and that the decoiler and the coiler are operated in a controlled manner.
  • the strip length and the speed of the strip material passing through are recorded in front of and behind each plunger roller and are fed to a control system for the rolling mill, from which signals are sent from the recorded data Position detection and / or correction of the position of the submerged rollers can be generated.
  • the tensile forces of the reels are recorded and the recorded data are fed to a control device, by means of which the power supply to the drive systems of the reels is regulated in such a way that the reel tension is adapted to the requirements from the operating parameters becomes.
  • the pitch of the rolls is recorded for a predetermined roll gap and these are fed as signals to a control device, by means of which the plunger rollers are set in a desired movement which is assigned to the roll gap and is stored in the control as a data pattern.
  • the rolls of the roll stand which determine the roll gap are operated at a constant roll speed.
  • FIG. 1 a device according to the invention for rolling strip material 1 with a periodically variable strip thickness is shown in general.
  • the device is shown schematically in a side view.
  • the direction of flow of the strip material is indicated at 2.
  • the device comprises a roll stand 3, of which the essential components, namely a roll set with two rolls 4 and 5, are shown.
  • an adjustment system 6 is shown schematically, which is designed to adjust the roll gap of the roll set 4, 5.
  • the roll gap which in particular Figure 2 and 3 is clearly visible, is set according to the desired strip thickness to be produced.
  • the strip material 1 is fed to the roll gap with an initial thickness on the input side from a decoiler 7 and from the roll gap the strip material 1 is fed to the reel 8 with the desired final thickness on the output side.
  • a roller arrangement with at least one plunger roller 9 or 10 is arranged between the uncoiler 7 and the roll stand 3 and also between the roll stand 3 and the reel 8, a roller arrangement with at least one plunger roller 9 or 10 is arranged.
  • tape guide rollers 13, 14, 15, 16 are arranged, with a further guide and deflection roller 17 between the guide roller 13 and the uncoiler 7 and also between the guide roller 16 and the reel 8 a further guide and deflection roller 18th arranged.
  • the continuous strip material 1 is guided around the rollers 17, 13, 9, 14 and 15, 10, 16, 18, respectively.
  • the plunger rollers can be adjusted by means of an actuator 19 or 20 in the direction of the movement arrows 11 or 12 upwards or downwards in the plane of the drawing and are at a constant roller speed of the rollers 4, 5 of the roll stand 3 which determine the roller gap as a function of the Positioning of the rollers 4, 5 in a position-controlled manner in order to compensate for the changes in speed of the rolling stock, that is to say of the strip material 1, at the inlet and at the outlet of the roll stand 3.
  • the uncoiler 7 and the reel 8 are operated with tension control.
  • a machine controller 27 which records and processes or stores the control values for the adjustment of the rolls 4, 5 for a predeterminable roll gap and by means of of which the immersion rollers 9, 10 are position-controllable in dependence thereon.
  • the machine controller 27 communicates with the setting system 6, with the belt length detection devices and belt speed monitoring devices 21, 22, 23, 24 with the actuating devices 19, 20 for the plunger rollers 9, 10, so that the machine controller 27 adjusts the rollers 4, 5 for the predetermined roll gap and the immersion rollers 9, 10 are position-controlled depending on it.
  • the entire area from the uncoiler 7 to the roll stand 3 is referred to as the entry area and the area from the roll stand 3 to the reel 8 is referred to as the exit area.
  • the changes in speed of the rolling stock (strip material 1) in the inlet and outlet of the roll stand 3, caused by the rolling of periodically variable strip thicknesses at a constant roller speed, are compensated for by the movement of the two plunging rollers 9 and 10.
  • the immersion rollers 9, 10 are position-controlled. The control takes place directly from the adjustment of the rollers 4, 5 in Connection with signals for the rolled strip length.
  • the operation of the two reels 7 and 8 is tension-controlled.
  • the aim is to derive the movement of the immersion rollers 9, 10 directly from the operating parameters of the rolling process.
  • the direction of movement and the type of movement (constant speed, acceleration or deceleration) of the plunging rollers 9, 10 are to be determined by the profile of the rolled material.
  • the immersion rollers 9, 10 move periodically. Each period of the immersion rollers 9, 10 in the inlet and outlet is assigned exactly one rolling period.
  • the profile of the rolled material of a rolling period L is divided into segments.
  • the individual segments each comprise areas with constant strip thickness (a with s 1 and b with s 2 ) and with variable strip thickness (Y and Z).
  • a segment in the outlet can always be of the same cross section and thus be assigned to the same-mass segment in the roller inlet (a E and b E as well as y E and z E with the input strip thickness s). For a rolling period L, this results in the strip length of the same mass in the inlet L E.
  • An average strip thickness s M in the outlet can be calculated from the individual segments of a rolling period. This average strip thickness is equivalent to the average speed at the roll outlet (V Am ) and thus also determines the average speed at the infeed (V EM ). The reel speeds in the inlet and outlet then correspond to these average speeds, as if the incoming strip of thickness s were rolled to thickness s M under constant conditions.
  • the movements of the roll adjustment and thus the roll profile are also decisive for the current speed.
  • the infeed speed is higher with a small stitch decrease than with a large stitch decrease.
  • the segments in the outlet can always have the same cross-section in the roller inlet assign. An average speed in the inlet can then be determined from the segments of a complete period, and the movement of the immersion rollers 9, 10 can also be determined according to segments.
  • the type and direction of the immersion roller movements 11, 12 thus result from the rolling parameters.
  • the rolling profile of a period L that is running out is compared in segments with a section of the same length L with the same thickness and the average thickness s M.
  • the segment b with the thickness s 2 is thicker than the average thickness s M. This means that the speed of the outgoing belt v A2 is lower than the average speed v AM . To compensate for this, a constant upward movement of the plunger is required.
  • the segment Z is divided into two sections by crossing the thickness of the rolled profile with the average thickness (Z 1 and Z 2 ). In the area Z 1 , the thickness is reduced to the average thickness. This means that the speed of the outgoing belt is accelerated up to the average speed v AM . At the crossing point, the average speed and the speed of the outgoing belt are identical. For the diving roller, this means that the upward movement of the diving roller is braked and the roller reaches its top dead center at the crossing point. The thickness increases in the area Z 2 reduced to thickness s 1 . The speed of the outgoing belt is accelerated up to the speed v A1 . The immersion roller is accelerated downwards in this area.
  • the segment a is thinner than the average thickness s M with the thickness s 1 .
  • the speed of the outgoing belt v A1 is therefore greater than the average speed v AM .
  • the plunger compensates for this by a constant downward movement.
  • segment Y the speed of the outgoing strip is reduced to the speed v A2 .
  • area Y 1 the downward movement is braked to bottom dead center and in area Y 2 , the plunger is accelerated upward again.
  • the control of the immersion roller movement in the inlet follows the immersion roller control of the outlet.
  • segment b E the speed of the incoming belt v E2 is higher than the average speed and in segment a E the speed v E1 is lower.
  • the immersion roller movement compensates for this and goes up at a constant speed in segment b E and also down in segment a E.
  • the segments Z E and Y E are also characterized by braking, dead center and acceleration. The dead points are controlled simultaneously with the dead points on the outlet side.
  • the rollers before the entry and after the exit of an immersion roller are each provided with pulse generators for tape length detection and speed monitoring.
  • the signals for the plunger roller movement can therefore be precisely matched to the roll position and thus to the roll profile.
  • Corrections may be necessary, for example, if the influence of the roller diameter becomes so great during very fast movements of the roll adjustment that the material parts that are additionally displaced or released in the inlet influence the plunger roll movement or if thickness deviations of the strip influence the rolling process.
  • the invention is not limited to the exemplary embodiments, but is often variable within the scope of the disclosure.

Description

Die Erfindung betrifft eine Vorrichtung zum Walzen von Bandmaterial mit periodisch veränderlicher Banddicke, wobei die Vorrichtung ein Walzgerüst mit einem Walzensatz und einem Anstellsystem zur Einstellung des Walzspaltes des Walzensatzes aufweist, welchem Walzspalt das Bandmaterial mit einer Ausgangsdicke eingangsseitig von einer Abhaspel aus zugeführt wird und von welchem aus das Bandmaterial mit der jeweils gewollten Enddicke ausgangsseitig einer Aufhaspel zugeführt wird.The invention relates to a device for rolling strip material with a periodically variable strip thickness, the device comprising a roll stand with a set of rollers and a setting system for adjusting the roll gap of the set of rolls, to which roll gap the strip material with an initial thickness is fed on the input side from a decoiler and from which from the strip material with the desired final thickness is fed to a reel on the output side.

Des Weiteren betrifft die Erfindung ein Verfahren zum Betrieb einer Vorrichtung zum Walzen von Bandmaterial mit periodisch veränderlicher Banddicke, wobei die Vorrichtung ein Walzgerüst mit einem Walzensatz und einem Anstellsystem zur Einstellung des Walzspaltes des Walzensatzes aufweist, wobei dem Walzspalt das Bandmaterial mit einer Ausgangsdicke eingangsseitig von einer Abhaspel aus zugeführt wird und von dem aus das Bandmaterial mit der jeweils gewollten, durch den Walzspalt bestimmten Enddicke ausgangsseitig einer Aufhaspel zugeführt wird.Furthermore, the invention relates to a method for operating a device for rolling strip material with a periodically variable strip thickness, the device having a roll stand with a roller set and an adjustment system for adjusting the roll gap of the roll set, the strip material having an initial thickness on the input side of the roll gap Decoiler is supplied and from which the strip material with the desired, through which Roll gap certain end thickness is fed to a reel on the output side.

Aus der JP H 10 34204 A ist eine Vorrichtung zum Walzen von Bandmaterial bekannt, bei der Tänzerrollen vorgesehen sind, um Geschwindigkeitsunterschiede des Bandes auszugleichen.From the JP H 10 34204 A a device for rolling strip material is known in which dancer rolls are provided in order to compensate for differences in speed of the strip.

Aus der EP 1 908 534 A1 ist eine Vorrichtung zum Walzen von Bandmaterial bekannt, bei der S-Rollenpaare als Bandspeicher jeweils ein- und auslaufseitig eines Walzgerüstes angeordnet sind.From the EP 1 908 534 A1 A device for rolling strip material is known, in which S-roller pairs are arranged as strip storage on the entry and exit sides of a roll stand.

Eine Vorrichtung gattungsgemäßer Art sowie ein Verfahren gattungsgemäßer Art sind im Stand der Technik bekannt. Bei solchen Vorrichtungen bzw. Verfahren werden üblicherweise Bandmaterialien aus Stahlbandmaterial verarbeitet. Insbesondere ist aus der EP 1 121 990 B2 eine gattungsgemäße Vorrichtung bekannt. Hierbei wird im Stand der Technik eine Möglichkeit aufgezeigt, mit der in wirtschaftlicher Art und Weise zu Coils aufgewickelte Metallbänder unter Zug abgewickelt, in der Dicke reduziert und anschließend unter Zug wieder aufgewickelt werden, wobei auf der Einlaufseite eine relativ konstante Banddicke vorgesehen wird und eine periodisch veränderliche Banddicke auf der Auslaufseite erreicht werden soll. In der angegebenen Druckschrift wird dies dadurch erreicht, dass zwischen Abhaspel und Walzgerüst sowie zwischen dem Walzgerüst und der Aufhaspel jeweils eine Ausgleichs- oder Tänzerrolle angeordnet ist, um die das Bandmaterial schleifenförmig herumgeführt ist und die bei konstanter Umfangsgeschwindigkeit der den Walzspalt bestimmenden Walzen des Walzgerüstes kraftgeregelt werden, um einen gewollten Bandzug aufzubringen. Zudem ist erforderlich, dass die Haspeln drehzahlgeregelt sind.A device of the generic type and a method of a generic type are known in the prior art. In such devices or methods, strip materials made of steel strip material are usually processed. In particular, is from the EP 1 121 990 B2 a generic device known. Here, the prior art shows a possibility with which metal strips wound into coils in an economical manner can be unwound under tension, reduced in thickness and then rewound under tension, with a relatively constant strip thickness being provided on the inlet side and periodically variable strip thickness is to be achieved on the outlet side. In the specified publication, this is achieved in that a compensating or dancer roll is arranged between the uncoiler and roll stand and between the roll stand and the reel, around which the strip material is looped around and which at constant circumferential speed of the roll gap determining rollers of the roll stand are force-controlled to apply a desired strip tension. It is also necessary that the reels are speed-controlled.

Diese vorgeschlagene Vorrichtung ist zwar im Prinzip brauchbar, jedoch ist insbesondere die Kraftregelung der Ausgleichs- oder Tänzerrollen nur mit einem relativ großem Zeitaufwand möglich, so dass Walzfehler aufgrund der periodisch veränderlichen Banddicke nicht schnell genug ausgeglichen werden können. Dies führt dazu, dass mit der Vorrichtung erzeugte Bänder mit periodisch veränderlicher Banddicke wegen der hohen Bandlaufgeschwindigkeiten fehlerhaft sind.Although this proposed device can be used in principle, the force control of the compensating or dancer rolls is only possible with a relatively large amount of time, so that rolling errors due to the periodically changing Strip thickness cannot be compensated quickly enough. The result of this is that tapes with periodically variable tape thickness produced with the device are defective because of the high tape running speeds.

Auch ist die Drehzahlregelung der Haspeln aufwendig und kann ebenfalls zu Fehlern beim Betrieb der entsprechenden Vorrichtung führen.The speed control of the reels is also complex and can also lead to errors when operating the corresponding device.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine alternative Lösung für eine entsprechende Vorrichtung bzw. ein entsprechendes Verfahren zur Verfügung zu stellen, die bzw. das von den Merkmalen der Kraftregelung einer Ausgleichs- oder Tänzerrolle sowie einer Drehzahlregelung der Haspeln keinen Gebrauch macht und die in Anpassung an die hohen Banddurchlaufgeschwindigkeiten eine schnellere automatische Einstellung des Walzspaltes und damit eine hohe Qualität eines periodisch veränderlichen Bandmaterials erreichbar macht und zwar unter Berücksichtigung der unterschiedlichen Bandgeschwindigkeiten am Einlauf und Auslauf des Walzspaltes.Based on this prior art, the object of the invention is to provide an alternative solution for a corresponding device or a corresponding method which does not have any of the features of the force control of a compensating or dancer roll and a speed control of the reels Makes use of and which, in adaptation to the high strip throughput speeds, enables a faster automatic adjustment of the roll gap and thus a high quality of a periodically variable strip material to be achieved, taking into account the different strip speeds at the entry and exit of the roll gap.

Zur Lösung dieser Aufgabe schlägt die Erfindung vor, dass sowohl zwischen der Abhaspel und dem Walzgerüst als auch zwischen dem Walzgerüst und der Aufhaspel eine Rollenanordnung mit einer Tauchrolle angeordnet ist, um die das Bandmaterial herumgeführt ist, und dass die Tauchrollen bei konstanter Walzendrehzahl der den Walzspalt bestimmenden Walzen des Walzgerüstes in Abhängigkeit von der Anstellung der Walzen positionsgesteuert sind, um die Geschwindigkeitsänderungen des Walzgutes am Einlauf und am Auslauf des Walzgerüstes auszugleichen, und dass die Abhaspel und die Aufhaspel zuggeregelt betrieben sind, und dass eine Maschinensteuerung vorgesehen ist, die die Anstellung der Walzen für einen vorbestimmbaren Walzspalt erfasst und mittels derer die Tauchrollen in Abhängigkeit davon positionssteuerbar sind.To achieve this object, the invention proposes that a roller arrangement with an immersion roller around which the strip material is guided is arranged both between the uncoiler and the roll stand and between the roll stand and the reel, and that the immersion rollers at a constant roller speed of the roll gap determining rolls of the roll stand depending on the position of the Rollers are position-controlled in order to compensate for the speed changes of the rolling stock at the inlet and at the outlet of the roll stand, and that the decoiler and the coiler are operated with tension control, and that a machine control is provided which detects the position of the rolls for a predeterminable roll gap and by means of which the Submersible rollers can be position-controlled depending on this.

Gemäß der Erfindung sind die Tauchrollen unmittelbar durch die Einstellung des Walzspaltes positionsgesteuert, was im Ergebnis zu einer deutlich schnelleren korrekten Einstellung bei wechselnden Walzspalten führt und zu einem exakten Walzergebnis. Zudem sind sowohl die Abhaspel als auch die Aufhaspel zuggeregelt betrieben, was für den Einsatz der Vorrichtung besonders vorteilhaft ist.According to the invention, the immersion rollers are position-controlled directly by the setting of the roll gap, which as a result leads to a significantly faster correct setting with changing roll gaps and to an exact rolling result. In addition, both the decoiler and the coiler are operated with tension control, which is particularly advantageous for the use of the device.

Bevorzugt ist zudem vorgesehen, dass vor jeder Tauchrolle und hinter jeder Tauchrolle eine Stützrolle für das Bandmaterial angeordnet ist, über die das Bandmaterial geführt ist, und dass jede Stützrolle eine Bandlängenerfassungseinrichtung und/oder eine Bandgeschwindigkeitsüberwachungseinrichtung aufweist.It is also preferably provided that a support roller for the strip material over which the strip material is guided is arranged in front of each dip roller and behind each dip roller, and that each support roller has a strip length detection device and / or a strip speed monitoring device.

Durch eine solche Anordnung und Ausgestaltung ist es möglich, die Position der Tauchrolle nicht nur in Abhängigkeit von der Einstellung des Walzspaltes zu steuern, sondern zusätzlich wird auch die jeweils erzeugte Bandlänge und die Bandgeschwindigkeit bei der Verstellung der Tauchrolle mit berücksichtigt. Dies führt zu einem noch besseren Ergebnis bezüglich des Walzvorganges.Such an arrangement and configuration make it possible not only to control the position of the plunger roller as a function of the setting of the roll gap, but also to take into account the strip length and the strip speed generated in each case when adjusting the plunger roller. This leads to an even better result with regard to the rolling process.

Zudem kann vorgesehen sein, dass die Abhaspel und die Aufhaspel mit einer Zugmesseinrichtung versehen sind, mittels derer die Stromzufuhr zu den Antriebsmotoren der Haspeln regelbar ist.In addition, it can be provided that the decoiler and the decoiler are provided with a tension measuring device, by means of which the current supply to the drive motors of the reels can be regulated.

Zudem ist bevorzugt vorgesehen, dass die den Walzspalt bestimmenden Walzen des Walzgerüstes mit konstanter Walzendrehzahl umlaufen.In addition, it is preferably provided that the rolls of the roll stand that determine the roll gap rotate at a constant roll speed.

Ein erfindungsgemäßes Verfahren ist dadurch gekennzeichnet, dass sowohl zwischen der Abhaspel und dem Walzgerüst als auch zwischen dem Walzgerüst und der Aufhaspel eine Rollenanordnung mit einer quer zur Laufrichtung des Bandmaterials verstellbaren Tauchrolle angeordnet wird, um die das Bandmaterial herumgeführt ist, wobei die Tauchrollen in Abhängigkeit von der Anstellung der Walzen des Walzgerüstes positionsgesteuert werden, so dass durch die Positionsänderung Geschwindigkeitsänderungen des durchlaufenden Walzgutes am Einlauf und am Auslauf des Walzgerüstes ausgeglichen werden, und dass die Abhaspel und die Aufhaspel zugeregelt betrieben werden.A method according to the invention is characterized in that a roller arrangement with an immersion roller which is adjustable transversely to the direction of travel of the strip material and around which the strip material is guided is arranged both between the uncoiler and the roll stand and also between the roll stand and the reel, the immersion rollers depending on the position of the rolls of the roll stand are position-controlled so that changes in speed compensate for changes in speed of the rolling stock at the inlet and at the outlet of the roll stand, and that the decoiler and the coiler are operated in a controlled manner.

Hierbei ist bevorzugt vorgesehen, dass vor und hinter jeder Tauchrolle die Bandlänge und die Geschwindigkeit des durchlaufenden Bandmaterials erfasst und einer Steuerung für die Walzanlage zugeführt wird, aus den erfassten Daten Signale zur Positionserfassung und/oder Korrektur der Position der Tauchrollen generiert werden.It is preferably provided here that the strip length and the speed of the strip material passing through are recorded in front of and behind each plunger roller and are fed to a control system for the rolling mill, from which signals are sent from the recorded data Position detection and / or correction of the position of the submerged rollers can be generated.

Des Weiteren ist bevorzugt vorgesehen, dass zum Zwecke der Zugregelung der Haspeln die Zugkräfte der Haspeln erfasst und die erfassten Daten einer Regeleinrichtung zugeführt werden, mittels derer die Stromzufuhr zu den Antriebssystemen der Haspeln derart geregelt wird, dass der Haspelzug jeweils den Erfordernissen aus den Betriebsparametern angepasst wird.Furthermore, it is preferably provided that, for the purpose of tension control of the reels, the tensile forces of the reels are recorded and the recorded data are fed to a control device, by means of which the power supply to the drive systems of the reels is regulated in such a way that the reel tension is adapted to the requirements from the operating parameters becomes.

Auch ist bevorzugt vorgesehen, dass die Anstellung der Walzen für einen vorbestimmten Walzspalt erfasst und diese als Signale einer Steuereinrichtung zugeführt werden, mittels derer die Tauchrollen in eine dem Walzspalt zugeordnete in der Steuerung als Datenmuster abgelegte Sollbewegung versetzt werden.It is also preferably provided that the pitch of the rolls is recorded for a predetermined roll gap and these are fed as signals to a control device, by means of which the plunger rollers are set in a desired movement which is assigned to the roll gap and is stored in the control as a data pattern.

Des Weiteren ist bevorzugt vorgesehen, dass die den Walzspalt bestimmenden Walzen des Walzgerüstes mit konstanter Walzendrehzahl betrieben werden.Furthermore, it is preferably provided that the rolls of the roll stand which determine the roll gap are operated at a constant roll speed.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und im Folgenden näher beschrieben. Es zeigt:

Figur 1
eine schematische Darstellung einer Vorrichtung zum Walzen von Bandmaterial in Seitenansicht;
Figur 2
Besonderheiten einer erfindungsgemäßen Ausgestaltung;
Figur 3
weitere Einzelheiten der erfindungsgemäßen Ausgestaltung.
An embodiment of the invention is shown in the drawing and described in more detail below. It shows:
Figure 1
a schematic representation of an apparatus for rolling strip material in side view;
Figure 2
Special features of an embodiment according to the invention;
Figure 3
further details of the configuration according to the invention.

In Figur 1 ist ganz allgemein eine erfindungsgemäße Vorrichtung zum Walzen von Bandmaterial 1 mit periodisch veränderlicher Banddicke dargestellt. Die Vorrichtung ist schematisch in Seitenansicht dargestellt. Die Durchlaufrichtung des Bandmaterials ist bei 2 angegeben. Die Vorrichtung umfasst ein Walzgerüst 3, von dem die wesentlichen Bestandteile, nämlich ein Walzensatz mit zwei Walzen 4 und 5 gezeigt ist. Ferner ist schematisch ein Anstellsystem 6 gezeigt, welches zur Einstellung des Walzspaltes des Walzensatzes 4, 5 ausgebildet ist.In Figure 1 a device according to the invention for rolling strip material 1 with a periodically variable strip thickness is shown in general. The device is shown schematically in a side view. The direction of flow of the strip material is indicated at 2. The device comprises a roll stand 3, of which the essential components, namely a roll set with two rolls 4 and 5, are shown. Furthermore, an adjustment system 6 is shown schematically, which is designed to adjust the roll gap of the roll set 4, 5.

Der Walzspalt, der insbesondere in Figur 2 und 3 gut ersichtlich ist, wird entsprechend der zu erzeugenden gewünschten Banddicke eingestellt. Dem Walzspalt wird das Bandmaterial 1 mit einer Ausgangsdicke eingangsseitig von einer Abhaspel 7 aus zugeführt und von dem Walzspalt aus wird das Bandmaterial 1 mit der jeweils gewollten Enddicke ausgangsseitig einer Aufhaspel 8 zugeführt. Sowohl zwischen der Abhaspel 7 und dem Walzgerüst 3 als auch zwischen dem Walzgerüst 3 und der Aufhaspel 8 ist eine Rollenanordnung mit jeweils mindestens einer Tauchrolle 9 bzw. 10 angeordnet. Neben den Tauchrollen 9 bzw. 10, die in Richtung der Bewegungspfeile 11 bzw. 12 beweglich sind, sind Bandführungsrollen 13, 14, 15, 16 angeordnet, wobei zwischen der Führungsrolle 13 und der Abhaspel 7 eine weitere Führungs- und Umlenkrolle 17 und ebenso zwischen der Führungsrolle 16 und der Aufhaspel 8 eine weitere Führungs- und Umlenkrolle 18 angeordnet. Das durchlaufende Bandmaterial 1 wird jeweils um die Rollen 17, 13, 9, 14 bzw. 15, 10, 16, 18 herumgeführt.The roll gap, which in particular Figure 2 and 3 is clearly visible, is set according to the desired strip thickness to be produced. The strip material 1 is fed to the roll gap with an initial thickness on the input side from a decoiler 7 and from the roll gap the strip material 1 is fed to the reel 8 with the desired final thickness on the output side. Both between the uncoiler 7 and the roll stand 3 and also between the roll stand 3 and the reel 8, a roller arrangement with at least one plunger roller 9 or 10 is arranged. In addition to the plunger rollers 9 and 10, which are movable in the direction of the movement arrows 11 and 12, tape guide rollers 13, 14, 15, 16 are arranged, with a further guide and deflection roller 17 between the guide roller 13 and the uncoiler 7 and also between the guide roller 16 and the reel 8 a further guide and deflection roller 18th arranged. The continuous strip material 1 is guided around the rollers 17, 13, 9, 14 and 15, 10, 16, 18, respectively.

Die Tauchrollen sind mittels jeweils eines Stellantriebes 19 bzw. 20 in Richtung der Bewegungspfeile 11 bzw. 12 nach oben bzw. nach unten in der Zeichnungsebene gesehen verstellbar und werden bei konstanter Walzendrehzahl der den Walzspalt bestimmenden Walzen 4, 5 des Walzgerüstes 3 in Abhängigkeit von der Anstellung der Walzen 4, 5 positionsgesteuert, um die Geschwindigkeitsänderungen des Walzgutes, also des Bandmaterials 1, am Einlauf und am Auslauf des Walzgerüstes 3 auszugleichen. Die Abhaspel 7 und die Aufhaspel 8 sind zuggeregelt betrieben.The plunger rollers can be adjusted by means of an actuator 19 or 20 in the direction of the movement arrows 11 or 12 upwards or downwards in the plane of the drawing and are at a constant roller speed of the rollers 4, 5 of the roll stand 3 which determine the roller gap as a function of the Positioning of the rollers 4, 5 in a position-controlled manner in order to compensate for the changes in speed of the rolling stock, that is to say of the strip material 1, at the inlet and at the outlet of the roll stand 3. The uncoiler 7 and the reel 8 are operated with tension control.

Die vor jeder Tauchrolle 9 und hinter jeder Tauchrolle 10 angeordneten Stützrollen 13, 14 bzw. 15, 16, über die das Bandmaterial 1 geführt ist, weisen jeweils eine Bandlängenerfassungseinrichtung und eine Bandgeschwindigkeitsüberwachungseinrichtung 21, 22 bzw. 23, 24 auf. Ferner ist die Abhaspel 7 und die Aufhaspel 8 jeweils mit einer Zugmesseinrichtung ZM versehen, mittels derer die Stromzufuhr, die bei 25, 26 angedeutet ist, zu den Antriebsmotoren MA der Haspeln 7, 8 regelbar ist, um den Haspelzug den Erfordernissen aus den Betriebsparametern angepasst zu halten.The support rollers 13, 14 and 15, 16, which are arranged in front of each immersion roller 9 and behind each immersion roller 10 and over which the strip material 1 is guided, each have a strip length detection device and a strip speed monitoring device 21, 22 and 23, 24, respectively. Furthermore, the reel 7 and the reel 8 are each provided with a tension measuring device ZM, by means of which the power supply, which is indicated at 25, 26, to the drive motors MA of the reels 7, 8 can be regulated in order to adapt the reel pull to the requirements from the operating parameters to keep.

Des Weiteren ist eine Maschinensteuerung 27 vorgesehen, die die Stellwerte für die Anstellung der Walzen 4, 5 für einen vorbestimmbaren Walzspalt erfassen und verarbeiten bzw. speichern und mittels derer die Tauchrollen 9, 10 in Abhängigkeit davon positionssteuerbar sind. Dazu kommuniziert die Maschinensteuerung 27 mit dem Anstellsystem 6, mit den Bandlängenerfassungseinrichtungen und Bandgeschwindigkeitsüberwachungseinrichtungen 21, 22, 23, 24 mit den Stelleinrichtungen 19, 20 für die Tauchrollen 9, 10, so dass mittels der Maschinensteuerung 27 die Anstellung der Walzen 4, 5 für den vorbestimmten Walzspalt erfasst und die Tauchrollen 9, 10 in Abhängigkeit davon positionsgesteuert werden.Furthermore, a machine controller 27 is provided, which records and processes or stores the control values for the adjustment of the rolls 4, 5 for a predeterminable roll gap and by means of of which the immersion rollers 9, 10 are position-controllable in dependence thereon. For this purpose, the machine controller 27 communicates with the setting system 6, with the belt length detection devices and belt speed monitoring devices 21, 22, 23, 24 with the actuating devices 19, 20 for the plunger rollers 9, 10, so that the machine controller 27 adjusts the rollers 4, 5 for the predetermined roll gap and the immersion rollers 9, 10 are position-controlled depending on it.

Die den Walzspalt bestimmenden Walzen 4, 5 des Walzgerüstes 3 werden mit konstanter Walzendrehzahl betrieben. In der Zeichnung sind in Figur 1 oben die Bereiche konstanter Geschwindigkeit des Bandmaterials 1 und veränderlicher Geschwindigkeit des Bandmaterials 1 einlaufseitig und auslaufseitig angegeben mit vE=konstant, vE=veränderlich, vA=veränderlich und vA=konstant.The rolls 4, 5 of the roll stand 3 which determine the roll gap are operated at a constant roll speed. In the drawing are in Figure 1 Above the ranges of constant speed of the strip material 1 and variable speed of the strip material 1 on the inlet and outlet sides indicated with v E = constant, v E = variable, v A = variable and v A = constant.

Der gesamte Bereich von der Abhaspel 7 bis zum Walzgerüst 3 wird als Einlaufbereich und der Bereich von dem Walzgerüst 3 bis zur Aufhaspel 8 als Auslaufbereich bezeichnet.The entire area from the uncoiler 7 to the roll stand 3 is referred to as the entry area and the area from the roll stand 3 to the reel 8 is referred to as the exit area.

Die durch das Walzen von periodisch veränderlichen Banddicken bei konstanter Walzendrehzahl entstehenden Geschwindigkeitsänderungen des Walzgutes (Bandmaterials 1) im Einlauf und Auslauf des Walzgerüstes 3 werden durch die Bewegung der beiden Tauchrollen 9 und 10 ausgeglichen. Die Tauchrollen 9, 10 werden positionsgesteuert. Die Steuerung erfolgt direkt aus der Anstellung der Walzen 4, 5 in Verbindung mit Signalen zur gewalzten Bandlänge. Der Betrieb der beiden Haspeln 7 und 8 erfolgt zuggeregelt.The changes in speed of the rolling stock (strip material 1) in the inlet and outlet of the roll stand 3, caused by the rolling of periodically variable strip thicknesses at a constant roller speed, are compensated for by the movement of the two plunging rollers 9 and 10. The immersion rollers 9, 10 are position-controlled. The control takes place directly from the adjustment of the rollers 4, 5 in Connection with signals for the rolled strip length. The operation of the two reels 7 and 8 is tension-controlled.

Ziel ist es, die Bewegung der Tauchrollen 9, 10 direkt aus den Betriebsparametern des Walzvorganges abzuleiten. Auf diese Weise soll die Bewegungsrichtung und die Art der Bewegung (konstante Geschwindigkeit, Beschleunigung oder Verzögerung) der Tauchrollen 9, 10 durch das Profil des gewalzten Materials bestimmt werden.The aim is to derive the movement of the immersion rollers 9, 10 directly from the operating parameters of the rolling process. In this way, the direction of movement and the type of movement (constant speed, acceleration or deceleration) of the plunging rollers 9, 10 are to be determined by the profile of the rolled material.

Was die Ansteuerung der Tauchrollenbewegung betrifft, so wird diese direkt aus den Signalen für die Walzenanstellung sowie den Bandlängensignalen abgeleitet, die mittels der Erfassungseinrichtungen 21, 22, 23, 24 erfasst werden.As far as the control of the plunger roller movement is concerned, this is derived directly from the signals for the roll adjustment and the strip length signals, which are detected by means of the detection devices 21, 22, 23, 24.

Die Bewegung der Tauchrollen 9, 10 erfolgt periodisch. Jede Periode der Tauchrollen 9, 10 im Ein- und Auslauf ist zeitlich exakt einer Walzperiode zugeordnet.The immersion rollers 9, 10 move periodically. Each period of the immersion rollers 9, 10 in the inlet and outlet is assigned exactly one rolling period.

Zur weiteren Erläuterung wird nun auf die Figuren 2 und 3 Bezug genommen.For further explanation, reference is now made to the Figures 2 and 3 Referred.

Um die Bewegung T der Tauchrollen 9, 10 exakt zuordnen zu können, wird das Profil des gewalzten Materials einer Walzperiode L in Segmente unterteilt. Die einzelnen Segmente umfassen jeweils Bereiche mit konstanter Banddicke (a mit s1 und b mit s2) sowie mit veränderlicher Banddicke (Y und Z). Durch Ermittlung der Einzelquerschnitte kann immer einem Segment im Auslauf ein querschnittsgleiches und somit massegleiches Segment im Walzeneinlauf zugeordnet werden (aE und bE sowie yE und zE mit der Eingangsbanddicke s). Daraus ergibt sich für eine Walzperiode L die massegleiche Bandlänge im Einlauf LE.In order to be able to assign the movement T of the plunging rollers 9, 10 exactly, the profile of the rolled material of a rolling period L is divided into segments. The individual segments each comprise areas with constant strip thickness (a with s 1 and b with s 2 ) and with variable strip thickness (Y and Z). By determining the individual cross sections, a segment in the outlet can always be of the same cross section and thus be assigned to the same-mass segment in the roller inlet (a E and b E as well as y E and z E with the input strip thickness s). For a rolling period L, this results in the strip length of the same mass in the inlet L E.

Aus den einzelnen Segmenten einer Walzperiode lässt sich eine durchschnittliche Banddicke sM im Auslauf errechnen. Diese durchschnittliche Banddicke ist ein Äquivalent für die durchschnittliche Geschwindigkeit im Walzenauslauf (VAm) und bestimmt somit auch die durchschnittliche Geschwindigkeit im Einlauf (VEM). Die Haspelgeschwindigkeiten in dem Ein- und Auslauf entsprechen dann jeweils diesen durchschnittlichen Geschwindigkeiten, so als ob unter konstanten Bedingungen das einlaufende Band der Dicke s auf die Dicke sM abgewalzt würde.An average strip thickness s M in the outlet can be calculated from the individual segments of a rolling period. This average strip thickness is equivalent to the average speed at the roll outlet (V Am ) and thus also determines the average speed at the infeed (V EM ). The reel speeds in the inlet and outlet then correspond to these average speeds, as if the incoming strip of thickness s were rolled to thickness s M under constant conditions.

Die segmentweise Betrachtung der Verhältnisse zwischen durchschnittlicher Banddicke und der Dicke in einem Segment lässt einen Rückschluss auf das jeweilige Geschwindigkeitsverhältnis zu. Je größer die Dickenunterschiede sind, desto größer ist auch der Geschwindigkeitsunterschied in diesem Segment des Walzenauslaufes.The segment-by-segment analysis of the relationships between the average strip thickness and the thickness in a segment allows conclusions to be drawn about the respective speed ratio. The greater the difference in thickness, the greater the difference in speed in this segment of the roll outlet.

Für den Walzeneinlauf sind ebenfalls die Bewegungen der Walzenanstellung und somit das Walzprofil maßgebend für die aktuelle Geschwindigkeit. Bei konstanter Walzengeschwindigkeit und gleichbleibenden Zügen ist bei geringer Stichabnahme die Einlaufgeschwindigkeit höher als bei großer Stichabnahme. Den Segmenten im Auslauf lassen sich immer querschnittsgleiche Segmente im Walzeneinlauf zuordnen. Aus den Segmenten einer kompletten Periode lässt sich dann sowohl eine durchschnittliche Geschwindigkeit im Einlauf bestimmen, als auch nach Segmenten zugeordnet die Bewegung der Tauchrollen 9, 10 ermitteln.For the roll infeed, the movements of the roll adjustment and thus the roll profile are also decisive for the current speed. With a constant roller speed and constant draws, the infeed speed is higher with a small stitch decrease than with a large stitch decrease. The segments in the outlet can always have the same cross-section in the roller inlet assign. An average speed in the inlet can then be determined from the segments of a complete period, and the movement of the immersion rollers 9, 10 can also be determined according to segments.

Die Art und Richtung der Tauchrollenbewegungen 11, 12 (konstante Geschwindigkeit auf/ab, Verzögerung, Totpunkt oder Beschleunigung) ergeben sich somit aus den Walzparametern. Um die Bewegung der Tauchrollen 9, 10 exakt dem Walzprozess zuzuordnen, wird das auslaufende Walzprofil einer Periode L segmentweise verglichen mit einem volumengleichen Abschnitt gleicher Länge L mit der durchschnittlichen Dicke sM.The type and direction of the immersion roller movements 11, 12 (constant speed up / down, deceleration, dead center or acceleration) thus result from the rolling parameters. In order to assign the movement of the immersion rollers 9, 10 exactly to the rolling process, the rolling profile of a period L that is running out is compared in segments with a section of the same length L with the same thickness and the average thickness s M.

Das Segment b ist mit der Dicke s2 dicker als die durchschnittliche Dicke sM. Dies bedeutet, dass die Geschwindigkeit des auslaufenden Bandes vA2 geringer ist als die durchschnittliche Geschwindigkeit vAM. Um dies auszugleichen ist eine konstante Aufwärtsbewegung der Tauchrolle erforderlich. Das Segment Z wird durch die Kreuzung der Dicke vom gewalzten Profil mit der mittleren Dicke in zwei Abschnitte geteilt (Z1 und Z2). Im Bereich Z1 wird die Dicke reduziert bis zur durchschnittlichen Dicke. Dies bedeutet, dass die Geschwindigkeit des auslaufenden Bandes beschleunigt wird, bis zur durchschnittlichen Geschwindigkeit vAM. Im Kreuzungspunkt sind durchschnittliche Geschwindigkeit und Geschwindigkeit des auslaufenden Bandes identisch. Für die Tauchrolle ergib sich daraus, dass die Aufwärtsbewegung der Tauchrolle gebremst wird und im Kreuzungspunkt die Rolle ihren oberen Totpunkt erreicht. Im Bereich Z2 wird die Dicke weiter reduziert bis zur Dicke s1. Die Geschwindigkeit des auslaufenden Bandes wird beschleunigt bis zur Geschwindigkeit vA1. Die Tauchrolle wird in diesem Bereich nach unten beschleunigt.The segment b with the thickness s 2 is thicker than the average thickness s M. This means that the speed of the outgoing belt v A2 is lower than the average speed v AM . To compensate for this, a constant upward movement of the plunger is required. The segment Z is divided into two sections by crossing the thickness of the rolled profile with the average thickness (Z 1 and Z 2 ). In the area Z 1 , the thickness is reduced to the average thickness. This means that the speed of the outgoing belt is accelerated up to the average speed v AM . At the crossing point, the average speed and the speed of the outgoing belt are identical. For the diving roller, this means that the upward movement of the diving roller is braked and the roller reaches its top dead center at the crossing point. The thickness increases in the area Z 2 reduced to thickness s 1 . The speed of the outgoing belt is accelerated up to the speed v A1 . The immersion roller is accelerated downwards in this area.

Das Segment a ist mit der Dicke s1 dünner als die durchschnittliche Dicke sM. Die Geschwindigkeit des auslaufenden Bandes vA1 ist somit größer als die durchschnittliche Geschwindigkeit vAM. Die Tauchrolle gleicht dies durch eine konstante Abwärtsbewegung aus.The segment a is thinner than the average thickness s M with the thickness s 1 . The speed of the outgoing belt v A1 is therefore greater than the average speed v AM . The plunger compensates for this by a constant downward movement.

Für das Segment Y gilt, dass die Geschwindigkeit des auslaufenden Bandes reduziert wird bis zur Geschwindigkeit vA2. Im Bereich Y1 wird die Abwärtsbewegung gebremst bis zum unteren Totpunkt und im Bereich Y2 wird die Tauchrolle wieder nach oben beschleunigt. Die Steuerung der Tauchrollenbewegung im Einlauf folgt der Tauchrollensteuerung des Auslaufes.For segment Y, the speed of the outgoing strip is reduced to the speed v A2 . In area Y 1 , the downward movement is braked to bottom dead center and in area Y 2 , the plunger is accelerated upward again. The control of the immersion roller movement in the inlet follows the immersion roller control of the outlet.

Im Segment bE ist die Geschwindigkeit des einlaufenden Bandes vE2 höher als die durchschnittliche Geschwindigkeit und im Segment aE ist die Geschwindigkeit vE1 geringer.In segment b E the speed of the incoming belt v E2 is higher than the average speed and in segment a E the speed v E1 is lower.

Die Tauchrollenbewegung gleicht dies aus und geht im Segment bE mit konstanter Geschwindigkeit nach oben und im Segment aE ebenso nach unten. Die Segmente ZE und YE sind ebenso durch Abbremsen, Totpunkt und Beschleunigen gekennzeichnet. Die Totpunkte werden jeweils zeitgleich mit den auslaufseitigen Totpunkten gesteuert.The immersion roller movement compensates for this and goes up at a constant speed in segment b E and also down in segment a E. The segments Z E and Y E are also characterized by braking, dead center and acceleration. The dead points are controlled simultaneously with the dead points on the outlet side.

Um die Bewegungen der Tauchrollen zu überwachen und gegebenenfalls zu korrigieren, sind jeweils die Rollen vor dem Einlauf und nach dem Auslauf einer Tauchrolle mit Impulsgebern zur Bandlängenerfassung und Geschwindigkeitsüberwachung versehen.In order to monitor and, if necessary, correct the movements of the immersion rollers, the rollers before the entry and after the exit of an immersion roller are each provided with pulse generators for tape length detection and speed monitoring.

Die Signale für die Tauchrollenbewegung können also exakt auf die Walzenanstellung und somit auf das Walzprofil abgestimmt werden.The signals for the plunger roller movement can therefore be precisely matched to the roll position and thus to the roll profile.

Korrekturen können zum Beispiel notwendig werden, wenn bei sehr schnellen Bewegungen der Walzenanstellung der Einfluss der Walzendurchmesser so groß wird, dass die zusätzlich im Einlauf verdrängten oder freiwerdende Materialanteile die Tauchrollenbewegung beeinflussen oder wenn Dickenabweichungen des Bandes den Walzprozess beeinflussen.Corrections may be necessary, for example, if the influence of the roller diameter becomes so great during very fast movements of the roll adjustment that the material parts that are additionally displaced or released in the inlet influence the plunger roll movement or if thickness deviations of the strip influence the rolling process.

Da die Bewegung der Tauchrollen sehr genau an die Walzenanstellung und somit an die jeweilige Profiländerung angepasst werden kann, ist eine konstante Wickelgeschwindigkeit und damit eine exakte Zugregelung für beide Haspeln problemlos möglich.Since the movement of the plunger rollers can be adapted very precisely to the roll position and thus to the respective profile change, a constant winding speed and thus an exact tension control for both reels is possible without any problems.

Es bleibt noch anzumerken, dass die im Ausführungsbeispiel dargestellten Vorgänge nur ein Beispiel sind. Es sind auch mehr als vier Segmente für eine Walzperiode möglich.It remains to be noted that the processes shown in the exemplary embodiment are only an example. More than four segments are also possible for a rolling period.

Die Erfindung ist nicht auf die Ausführungsbeispiele beschränkt, sondern im Rahmen der Offenbarung vielfach variabel.The invention is not limited to the exemplary embodiments, but is often variable within the scope of the disclosure.

Stückeverzeichnis:Track directory:

11
Bandmaterialband material
22
Bewegungsrichtung von 1Direction of movement from 1
33
Walzgerüstrolling mill
44
Walzeroller
55
Walzeroller
66
Anstellsystemadjustment system
77
Abhaspeluncoiler
88th
Aufhaspelcoiler
99
Tauchrollediving role
1010
Tauchrollediving role
1111
Bewegungsrichtung von 9Direction of movement of 9
1212
Bewegungsrichtung von 10Direction of movement of 10
1313
Umlenkrolleidler pulley
1414
Umlenkrolleidler pulley
1515
Umlenkrolleidler pulley
1616
Umlenkrolleidler pulley
1717
Führungsrolleleadership
1818
Führungsrolleleadership
1919
Stelleinrichtung von 9Actuator from 9
2020
Stelleinrichtung von 10Actuator from 10
2121
Bandlängenerfassungs- und Bandlängengeschwindigkeitsüberwachungs-einrichtungTape length detection and tape length monitoring device
2222
Bandlängenerfassungs- und Bandlängengeschwindigkeitsüberwachungs-einrichtungTape length detection and tape length monitoring device
2323
Bandlängenerfassungs- und Bandlängengeschwindigkeitsüberwachungs-einrichtungTape length detection and tape length monitoring device
2424
Bandlängenerfassungs- und Bandlängengeschwindigkeitsüberwachungs-einrichtungTape length detection and tape length monitoring device
2525
Stromversorgung von 7Power supply from 7
2626
Stromversorgung von 8Power supply from 8
ZMZM
Zugmesseinrichtungtensile gauge
MAMA
Antriebsmotordrive motor
2727
Maschinensteuerungmachine control
TT
Bewegung der TauchrollenMovement of the diving rollers
LL
Walzperioderolling period

Claims (9)

  1. A device for rolling strip material (1) with a periodically variable strip thickness, the device including a roller stand (3) with a set of rollers and an adjustment system (6) for adjustment of the roller gap of the set of rollers, to the entry side of said roller gap the strip material (1) having an initial thickness being fed from an uncoiling station (7) and from the exit side of which the strip material (1) with the respectively desired final thickness being fed to a coiling station (8), characterized by that between the uncoiling station (7) and the roller stand (3) as well as between the roller stand (3) and the coiling station (8), a roller assembly with an immersion roller (9, 10) is disposed, around which the strip material (1) is guided, that the positions of the immersion rollers (9, 10), with constant roller speed of the rollers (4, 5) of the roller stand (3) determining the roller gap, are controlled depending on the adjustment of the rollers (4, 5) in order to balance the speed variations of the rolling material at the entry and at the exit of the roller stand (3), and that the uncoiling station (7) and the coiling station (8) are operated in a tension-controlled manner, and that a machine controller (27) is provided that detects the adjustment of the rollers (4, 5) for a predetermined roller gap and by means of which, depending thereon, the positions of the immersion rollers (9, 10) can be controlled.
  2. The device according to claim 1, characterized by that before each immersion roller (9, 10) and behind each immersion roller (9, 10), a support roller (13, 14; 15, 16) for the strip material (1) is disposed, over which the strip material (1) is guided, and that each support roller (13, 14; 15, 16) comprises a strip length detection device and/or a strip speed monitoring device (21, 22; 23, 24).
  3. The device according to one of claims 1 or 2, characterized by that the uncoiling station (7) and the coiling station (8) are provided with a tension measurement device (ZM), by means of which the current supply to the drive motors (MA) of the coiling/uncoiling stations can be controlled.
  4. The device according to claim 1 to 3, characterized by that the rollers (4, 5) of the roller stand (3) determining the roller gap rotate with constant roller speed.
  5. A method for operating a device for rolling strip material (1) with a periodically variable strip thickness, the device including a roller stand (3) with a set of rollers and an adjustment system (6) with a machine controller (27) for adjustment of the roller gap of the set of rollers, to the entry side of said roller gap the strip material (1) having an initial thickness being fed from an uncoiling station (7) and from the exit side of which the strip material (1) with the respectively desired final thickness being fed to a coiling station (8), characterized by that between the uncoiling station (7) and the roller stand (3) as well as between the roller stand (3) and the coiling station (8), a roller assembly with an immersion roller (9, 10) adjustable transversely to the running direction (2) of the strip material (1) is disposed, over which the strip material (1) is guided, the positions of the immersion rollers (9, 10), depending on the adjustment of the rollers (4, 5) of the roller stand (3), being controlled such that, by the position variation, speed variations of the passing rolling material at the entry and at the exit of the roller stand (3) are balanced, and that the uncoiling station (7) and the coiling station (8) are operated in a tension-controlled manner.
  6. The method according to claim 5, characterized by that before each immersion roller (9, 10) and behind each immersion roller (9, 10), the strip length and the speed of the passing strip material (1) are detected and supplied to a controller (27) for the rolling mill, and that from the detected data, signals for the position detection and/or correction of the position of the immersion rollers (9, 10) are generated.
  7. The method according to one of claims 5 or 6, characterized by that for the purpose of tension control of the coiling/uncoiling stations (7, 8), the tension forces of the coiling/uncoiling stations (7, 8) are detected, and the detected data are supplied to a control device, by means of which the current supply to the drive systems of the coiling/uncoiling stations (7, 8) is controlled such that the tension of the coiling/uncoiling stations is respectively adjusted to the requirements resulting from the operating parameters.
  8. The method according to one of claims 5 to 7, characterized by that the adjustment of the rollers (4, 5) for a predetermined roller gap is detected and supplied as signals to a control device (27), by means of which the immersion rollers (9, 10) are adjusted to a set position assigned to the roller gap and stored in the controller as a data pattern.
  9. The method according to one of claims 5 to 8, characterized by that the rollers (4, 5) of the roller stand (3) determining the roller gap are operated with constant roller speed.
EP17155391.0A 2016-02-23 2017-02-09 Device and method for rolling a strip of material with variable thickness Active EP3210681B1 (en)

Applications Claiming Priority (1)

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DE102016103088 2016-02-23

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US11701695B2 (en) 2018-12-06 2023-07-18 Sms Group Gmbh Method for operating a roll stand for stepped rolling

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HUE063023T2 (en) * 2016-12-30 2023-12-28 Outokumpu Oy Method and device for flexible rolling metal strips
CN107716550B (en) * 2017-09-09 2019-03-29 首钢集团有限公司 A kind of production method of low-alloy longitudinal thickness-variable steel plate
JP7135991B2 (en) * 2019-04-25 2022-09-13 トヨタ自動車株式会社 Calibration judgment device and calibration judgment method
DE102020211770A1 (en) * 2020-03-06 2021-09-09 Sms Group Gmbh Roll stand
BR112022021572A2 (en) 2020-05-14 2022-12-06 Nippon Steel Corp METHOD TO PRODUCE REDUCED IRON
CN112605124B (en) * 2020-11-27 2022-07-05 苏州吉润汽车零部件有限公司 Rolling equipment and forming method for continuous variable cross-section thin steel plate

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DE10004532A1 (en) 2000-02-02 2001-08-30 Josef Froehling Gmbh Walzwerks Device for rolling strips with a periodically variable strip thickness
DE10310399B4 (en) * 2003-03-07 2005-03-03 Sundwig Gmbh Apparatus and method for rolling metal strips
DE102006047463A1 (en) * 2006-10-07 2008-04-17 ACHENBACH BUSCHHüTTEN GMBH Rolling mill and method for flexible cold or hot one-way or reverse rolling of metal strip

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US11701695B2 (en) 2018-12-06 2023-07-18 Sms Group Gmbh Method for operating a roll stand for stepped rolling

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US20170239700A1 (en) 2017-08-24
ES2769264T3 (en) 2020-06-25
US10413949B2 (en) 2019-09-17
EP3210681A1 (en) 2017-08-30

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