EP0175679A2 - Procédé et dispositif de réglage d'un produit laminé continu dans un train de laminage continu - Google Patents

Procédé et dispositif de réglage d'un produit laminé continu dans un train de laminage continu Download PDF

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Publication number
EP0175679A2
EP0175679A2 EP85890225A EP85890225A EP0175679A2 EP 0175679 A2 EP0175679 A2 EP 0175679A2 EP 85890225 A EP85890225 A EP 85890225A EP 85890225 A EP85890225 A EP 85890225A EP 0175679 A2 EP0175679 A2 EP 0175679A2
Authority
EP
European Patent Office
Prior art keywords
parameter
speed
rolling
stand
assigned
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85890225A
Other languages
German (de)
English (en)
Other versions
EP0175679A3 (fr
Inventor
Walther Dipl.-Ing. Ossoinig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voestalpine AG
Original Assignee
Voestalpine AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voestalpine AG filed Critical Voestalpine AG
Publication of EP0175679A2 publication Critical patent/EP0175679A2/fr
Publication of EP0175679A3 publication Critical patent/EP0175679A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
    • B21B1/04—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing in a continuous process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B2035/005—Hydraulic drive motors

Definitions

  • the invention relates to a method for controlling the rolling stock pass in continuous rolling mills with controllable hydraulic motors for the individual stands, in which a physical parameter that changes with the rolling stock is measured on each stand and then the speed of the hydraulic motors corresponding to the deviation of the parameter from a desired value is regulated.
  • a method of the type mentioned at the outset has become known (AT-PS 356 622), in which each hydraulic motor is assigned a pump; The hydraulic pressure of the hydraulic motors is used as a parameter and, in the event of deviations from the setpoint, the control is carried out by pump adjustment of the motor of the respective subsequent frame.
  • Rolling mills driven by DC motors have also become known (AT-PS 371 029), in which the difference between the rolling stock speed and the circumferential roller speed is determined on each stand and this difference is used as a parameter for controlling the drive.
  • the aim of the invention is to provide a control method which enables a rapid change in speed in the event of deviations from a target tension and which works with high reliability.
  • the setpoint required for the control can be determined in a simple manner if the parameter determined during the tapping is stored in a manner known per se as the setpoint for the control in further operation.
  • the influence of temperature on the control can be minimized if the quotient of the rolling torque and the rolling force is determined in a manner known per se.
  • a particularly simple and precise control is obtained if, in a manner known per se, the - optionally standardized - difference between the circumferential roll speed and the running-in speed of the rolling stock is determined as a parameter.
  • a device is suitable for carrying out the method according to the invention in which a controllable hydraulic motor is assigned to each roll stand and sensors are provided for determining a physical variable which changes with the rolling stock and which, according to the invention, are characterized in that each roll stand is fed with a constant pressure, directly, e.g. by adjusting the swivel angle, a controllable hydraulic motor is assigned and that a control circuit is provided for each roll stand for regulating the motor speed of the roll stand in question as a function of the characteristic variable determined on this stand.
  • FIG. 1 shows a rolling stand with the associated drive in a schematic view in the longitudinal direction of the road
  • FIG. 2 shows a basic circuit diagram of the drive and the control of a stand corresponding to the prior art
  • FIG. 3 shows the basic circuit diagram of a control according to the invention, in which the quotient of the rolling moment and the rolling force is used as the characteristic variable
  • FIG. 4 shows, as before, another embodiment of the invention, in which the difference between the roller circulation speed and the running-in speed of the rolling stock is used as the characteristic variable.
  • a roll stand 1 is provided with an employment 2. It also has a spindle support 3, drive spindles 4, a worm gear 5, an intermediate gear 6 and a hydraulic motor 7.
  • Such rolling stands can be used in roughing mills, rolling mills, intermediate and finishing mills in which rod-shaped, round or square material, but also flat or tubular material should be rolled without loop formation due to oversized cross sections and resistance moments or for space reasons, the regulation according to the invention is used.
  • the hydraulic motor 7 works on the intermediate gear 6, the pinion gear 5, etc., as shown in FIG. 1.
  • the speed is controlled by a swivel angle adjustment.
  • a hydraulic actuator 8 with a proportional valve 9 is provided.
  • the hydraulic motor 7, the actuator 8 and the valve 9 are connected in the manner shown to a pressure line 10, a suction line 11 and a leak oil line 12.
  • a pressure accumulator 13 is also located on the pressure line 10.
  • the engine speed is measured continuously by means of a tachodynamo 14, an angle sensor 15 detects the respective swivel angle cZ.
  • the detected quantities are fed to a controller 16, which has a control input 17 (speed setpoint).
  • Fig. 3 two roll stands 1, 1 'are indicated schematically, which are part of a rolling train for rolling a strand 18 which, as indicated by the arrow A, runs from left to right in the drawing.
  • a controllable drive according to FIG. 2 is assigned to each scaffold and does not need to be explained in more detail. Furthermore, a control system 19, 19 'belongs to each scaffold and a drive guidance system 20 is assigned to the entire road.
  • a transmitter 21 is provided on each stand 1, 1 'and determines the respective rolling force f W.
  • the corresponding signal is fed to the control system 19 via an averager 22.
  • a multiplier 23 is also provided, to which a signal, which is a function f ( ⁇ ) of the swivel angle «of the motor 7, is fed.
  • the multiplier receives a signal ⁇ p which is proportional to the pressure difference of the hydraulic motor 7.
  • This quotient is used as a parameter for tension control, since a largely independent temperature of the parameter can be achieved by forming the quotient, whereas the rolling moment M w has a pronounced temperature dependency.
  • the signal Q is supplied on the one hand to a memory 25 and on the other hand to a switch 26.
  • the output signal Q of the memory 25 or the signal Q are fed to a controller 27, the output of which in turn reaches the control input 17 of the controller 16 via a summation generator 28.
  • the drive control system 20 can via the totalizers 28, 28 ',. act on all motor controllers 16, 16 ', ..
  • This type of control is used over the entire length of the strand on each stand, whereby the individual control systems 19, 19 ', ... can report their status to the central drive control system, so that the totalizers 28, 28', ..
  • a higher-level control or regulation is also possible.
  • a sequence control can also be provided on each scaffold, via which additional parameters can be entered into the drive guidance system 20 and via which the control can also be intervened.
  • FIG. 4 A control similar to that of FIG. 3 is illustrated in FIG. 4, but a different parameter is used. The same parts are provided with the same reference numerals as in FIG. 3.
  • the speed of the strand 18 is preferably measured without contact by means of a speed detector 29.
  • the detector 29 supplies a signal v i which corresponds to the running-in speed (actual speed value) of the line.
  • the effective roller circumferential speed v is determined from a signal n o corresponding to the roller speed and a signal corresponding to the roller diameter D wo .
  • the normalized speed difference (vv i ) / v u is then calculated in a computing circuit 31. This parameter serves as the control parameter.
  • the speed difference is a measure of the tension or pressure occurring between the scaffolding.
  • a setpoint value is stored in the memory 25, namely that value (v u - v i ) / v u which is determined when tapping in the free outlet before tapping the next stand.
  • the control system adjusts the speed of the scaffold to be controlled so that the stored back pressure value (speed difference) free of longitudinal force is restored on the previous scaffold.
  • the following stands are adjusted by the same determined speed (subsequent adjustment), so that no longitudinal tensile or compressive forces build up between other stands. This can be done via the drive guide system 20.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
EP85890225A 1984-09-21 1985-09-18 Procédé et dispositif de réglage d'un produit laminé continu dans un train de laminage continu Withdrawn EP0175679A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT3010/84 1984-09-21
AT0301084A AT381250B (de) 1984-09-21 1984-09-21 Verfahren und vorrichtung zur regelung des walzgutdurchlaufes in kontinuierlichen walzstrassen

Publications (2)

Publication Number Publication Date
EP0175679A2 true EP0175679A2 (fr) 1986-03-26
EP0175679A3 EP0175679A3 (fr) 1986-08-27

Family

ID=3543915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85890225A Withdrawn EP0175679A3 (fr) 1984-09-21 1985-09-18 Procédé et dispositif de réglage d'un produit laminé continu dans un train de laminage continu

Country Status (3)

Country Link
EP (1) EP0175679A3 (fr)
JP (1) JPS6182914A (fr)
AT (1) AT381250B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0549557A1 (fr) * 1991-11-11 1993-06-30 GFM Gesellschaft für Fertigungstechnik und Maschinenbau Aktiengesellschaft Procédé et dispositif pour la régulation d'un passage à faible force longitudinale du produit laminé continu à travers un train de laminoir continu

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB587466A (en) * 1944-08-17 1947-04-25 Standard Machinery Company Improvements in or relating to rolling mills
DE1054299B (de) * 1952-10-18 1959-04-02 Hydromatik G M B H Mehrfachgetriebe
DE1279589B (de) * 1962-04-03 1968-10-10 Max Planck Inst Eisenforschung Verfahren zur Regelung kontinuierlich arbeitender Walzenstrassen
DE1602203A1 (de) * 1967-03-28 1970-04-16 Wissenschaftlich Tech Zentrum Antrieb fuer Walz- und Rollenrichtmaschinen
JPS5224146A (en) * 1975-08-20 1977-02-23 Tokyo Shibaura Electric Co Device for controlling tension between stands in continuous rolling mill
US4123927A (en) * 1976-07-14 1978-11-07 Friedrich Kocks Gmbh & Co. Rolling mill
DE2815341A1 (de) * 1978-04-10 1979-10-18 Bbc Brown Boveri & Cie Verfahren und schaltungsanordnung zur regelung der laengskraft zwischen walzgeruesten einer kontinuierlichen walzstrasse mit einzelantrieben
AT356622B (de) * 1978-12-18 1980-05-12 Gfm Fertigungstechnik Verfahren zum regeln des walzgutdurchlaufes durch eine kontinuierliche walzstrasse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0549557A1 (fr) * 1991-11-11 1993-06-30 GFM Gesellschaft für Fertigungstechnik und Maschinenbau Aktiengesellschaft Procédé et dispositif pour la régulation d'un passage à faible force longitudinale du produit laminé continu à travers un train de laminoir continu

Also Published As

Publication number Publication date
EP0175679A3 (fr) 1986-08-27
JPS6182914A (ja) 1986-04-26
ATA301084A (de) 1986-02-15
AT381250B (de) 1986-09-10

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Inventor name: OSSOINIG, WALTHER, DIPL.-ING.