EP0054535A2 - Dispositif pour surveiller des trains de laminoir ou des trains refroidisseurs - Google Patents

Dispositif pour surveiller des trains de laminoir ou des trains refroidisseurs Download PDF

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Publication number
EP0054535A2
EP0054535A2 EP81890194A EP81890194A EP0054535A2 EP 0054535 A2 EP0054535 A2 EP 0054535A2 EP 81890194 A EP81890194 A EP 81890194A EP 81890194 A EP81890194 A EP 81890194A EP 0054535 A2 EP0054535 A2 EP 0054535A2
Authority
EP
European Patent Office
Prior art keywords
light source
cooling section
rolling
mill
control unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP81890194A
Other languages
German (de)
English (en)
Other versions
EP0054535A3 (en
EP0054535B1 (fr
Inventor
Harald Dipl.-Ing. Brandl
Reinhard Dolc
Klaus Dr. Dipl.-Ing. Kammerhofer
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 EP0054535A2 publication Critical patent/EP0054535A2/fr
Publication of EP0054535A3 publication Critical patent/EP0054535A3/de
Application granted granted Critical
Publication of EP0054535B1 publication Critical patent/EP0054535B1/fr
Expired 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
    • B21B33/00—Safety devices not otherwise provided for; Breaker blocks; Devices for freeing jammed rolls for handling cobbles; Overload safety devices

Definitions

  • the invention relates to a device for monitoring rolling mills and cooling lines, in particular for the production of bars or wires.
  • a device for monitoring rolling mills and cooling lines in particular for the production of bars or wires.
  • the throughput is increased with increasing operating weights and higher rolling speeds.
  • Process control is provided at rolling speeds of, for example, 30 to 80 m / s, since such rolling speeds already exceed the responsiveness of the control personnel.
  • process controls which work using process computers, a number of essential operating parameters for the rolling, in particular the speed specification of the drive, the control of separating units or scissors, the loop control and the sequence control, are automatically monitored and controlled.
  • Such computer-controlled rolling mills require an unobstructed pass line for the rolling stock.
  • a check on the rolling mills for obstacles is generally only carried out on the current rolling mills and cooling lines when the rolling mill has been moved. is built or if the rolling malfunction has already occurred. It is not possible to check the continuous line during rolling operation with the known measures due to the short cycle times of often less than 5 s.
  • the invention aims to provide a device of the type mentioned at the beginning with which the automatic testing of the pass line in the time sections between successive rolling operations can be carried out at the speed required for this.
  • the invention consists essentially in that at least one light source, for example a Ne-He laser, is arranged at one end of a rolling mill or cooling section in the pass line of the material to be rolled and out of the pass line so that at least a light-sensitive sensor, for example a Si photodiode, is arranged at the other end of the rolling mill or cooling section in the through-line of the material to be rolled and can be pivoted out of it, and that the signals of the light-sensitive sensor of an evaluation circuit and a control unit for the rolling mill or cooling section are fed.
  • a light source for example a Ne-He laser
  • the pass line is checked optoelectronically, a process computer can be used rapid check for obstacle clearance in the relatively short time interval t to be made between successive rolling operations.
  • the light source and light-sensitive sensor are each pivotably arranged and can be swiveled into the pass line for the measuring process and swiveled out of the pass line again after the measurement has taken place.
  • the light source is formed, for example, by a Ne-He laser with an output of ⁇ 10 mW. Such a laser is not significantly influenced by the industrial atmosphere or the ambient light and can be focused very precisely.
  • a Si photo diode can be used, which is characterized by low response times of, for example, 10 -2 s.
  • the signals from the light-sensitive sensor can either be evaluated with the process computer available for controlling the process or with a separate evaluation circuit and used for controlling the drive.
  • At least one additional material detector such as, for. B. a photocell, a light barrier or inductive or capacitive proximity switch before the inlet and / or after the outlet of the rolling mill or cooling section to be monitored
  • the control device can be connected to a drive for pivoting the light source and de sensor.
  • the possible malfunctions can be recognized in good time and the necessary control measures can be implemented in good time. If, for example, the measurement of the through line shows that there is no obstacle, no additional control measures are necessary. In the event that an obstacle has been found in the through line, the An conveyance of further material until the obstacle is removed, provided that the primary material has not yet been conveyed into the production line.
  • the control device can, for example, initiate measures for removing the obstacle, provided there is still sufficient time for this. If a replacement product route is available, the collision of the material that has entered the production line could be prevented by switching a switch. If such a path is not available, so that these measures would be too late to prevent a collision, a separating unit can still be activated as a last resort, so that the rolling stock is removed from the rolling train before hitting the obstacle.
  • the training is preferably such that the control unit in a manner known per se with the drive of the rolling mill or cooling section and / or with at least one subassembly, such as. B. a chopper, and / or at least one switch to an alternative path, is connected before the inlet of the rolling mill or cooling section to be monitored.
  • the light source is advantageously arranged at the outlet end of the rolling mill to be monitored, which creates the possibility that the beam cone of the light source is focused according to the caliber row of the rolling mill. Such focusing of the light source offers the greatest security for the detection of obstacles in the rolling mill or the cooling section.
  • FIG. 1 shows a block diagram of a conventional computer-controlled rolling mill
  • FIG. 2 shows a 1 with the monitoring device according to the invention
  • FIG. 3 a further embodiment of the monitoring device according to the invention.
  • the billet task is denoted by 1.
  • 2 shows a walking beam furnace which can serve as a material buffer.
  • 3 designates a two-core roughing street, to which intermediate streets 4 connect. Following the intermediate streets 4, switches 5 are provided for the distribution of the rolling stock. 6 is used to refer to garret reels, while the material is fed to winding layers 8 for the formation of the bundle via the finishing lines designated 7.
  • a coil transport device is designated.
  • the process control is indicated schematically in FIG. 1, 10 being the conductance calculator for the first wire and 11 being the conductance calculator for the second wire.
  • a corresponding process periphery 13 is also provided.
  • a material tracking computer 14 together with the associated process periphery 15 is included in the process control. Coupling lines for connecting the individual computers or peripherals are indicated at 16.
  • FIG. 2 The monitoring device is now included in such a system, as shown in FIG. 2.
  • the components that are unchanged from FIG. 1 are designated by the same reference numerals, a hook path 17 for the removal of the bundles for testing, pressing, binding, sorting and unloading being visible in the enlarged representation.
  • the monitoring device has a measuring device consisting of a light source 18 and a light-sensitive sensor 19.
  • the light source 18 is of a Ne-He laser and the light-sensitive sensor of an Si photodiode.
  • Transmitter and receiver 18 and 19 are pivotally mounted about an axis 21 lying outside the respective pass line 2 0 and provided with a pivot drive 22.
  • FIG. 3 An enlarged representation of such a monitoring device can be seen in FIG. 3.
  • the Ne-He laser 18 is on a divergence .c. of ⁇ 0.08 mRad focused, this angle corresponds, for example, the caliber series of mill train 4.
  • both the transmitter 18 and the receiver 19 are pivoted into the pass line 20 and the signal emitted by the laser is made available by the Si photodiode 19 to an evaluation circuit 23.
  • a signal line 26 or 27 is used for the evaluation circuit 23.
  • the evaluation circuit 23 is connected to the central control and control unit 29 via the line 28.
  • a material detector 30 is arranged in front of the inlet end 25.
  • the material detector arranged after the outlet end 24 is designated 31, the signals of the material detectors 30, 31 being connected to the central control and control unit 29 via signal lines 32.
  • the swivel drive 22 of the transmitter or receiver is actuated by lines 33 from the central control and control unit 29. If the material detector 30 indicates that the rod end has passed the point of this detector, the pivoting of the receiver 19 into the pass line 20 can be initiated after a corresponding safety time. At the same time, the time monitoring for the next staff can begin. If now the material detector 31 signals the passing of the rod end, the pivoting of the transmitter 18 in the D is urchmoorline by the central monitoring and control unit 29 20 worked. The correspondingly focused signal is then sent out and the evaluation is carried out. Immediately after the measurement process, the transmitter 18 and receiver 19 are pivoted back into their starting position outside the pass line 20.
  • the central control and control unit and a control system for the feed unit 34 for the primary material in turn release any locking which may have been triggered previously and initiate the discharge of the next rolled primary material.
  • the raw material control 3 1 remains locked until the obstacle is removed. If there is already a signal from the material detector 30 at such a time, this means that the following rolling stock is already in the inlet. In the case shown in FIG. 3, an alternative route is no longer available and an obstacle removal also appears too late.
  • a chopping shear 36 is put into operation via the control line 35, which cuts up the rolling stock before hitting the obstacle and removes it from the rolling train. Such a measure can be omitted if a switch can be used to redirect to a replacement product route or if timely obstacle removal can take place.
  • the laser used is calibrated when the rolling mill is empty. In operation, when a beam intensity of at least 90% is received, the rolling mill is assumed to be free of obstacles.
  • control measures can be carried out in a hard-wired manner in the computer. They can also be freely programmed, which is more flexible if e.g. B. the production plant is changed or further control measures are to be included.
  • the monitoring device is only arranged on the intermediate and finished streets. A check is not absolutely necessary in Vor No 3, which is still used with larger cross sections.
  • the interconnection of rolling mills can be done individually or in combination. If these rolling mills follow one another directly, practically only the combined release is possible.
  • Ne-He laser has the advantage that such a transmitter operates unaffected by the industrial atmosphere, such as oil mist and water vapor, and is not disturbed by the ambient light.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Metal Rolling (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP81890194A 1980-12-16 1981-12-03 Dispositif pour surveiller des trains de laminoir ou des trains refroidisseurs Expired EP0054535B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT6133/80 1980-12-16
AT0613380A AT369591B (de) 1980-12-16 1980-12-16 Elektrische ueberwachungseinrichtung fuer staboder drahtwalzwerke oder fuer kuehlstrecken von walzenstrassen

Publications (3)

Publication Number Publication Date
EP0054535A2 true EP0054535A2 (fr) 1982-06-23
EP0054535A3 EP0054535A3 (en) 1983-02-16
EP0054535B1 EP0054535B1 (fr) 1984-11-28

Family

ID=3583212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81890194A Expired EP0054535B1 (fr) 1980-12-16 1981-12-03 Dispositif pour surveiller des trains de laminoir ou des trains refroidisseurs

Country Status (5)

Country Link
US (1) US4477722A (fr)
EP (1) EP0054535B1 (fr)
JP (1) JPS57146413A (fr)
AT (1) AT369591B (fr)
DE (1) DE3167506D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997000148A1 (fr) * 1995-06-14 1997-01-03 Paul Wurth S.A. Commande a interrupteur inductif pour train de rouleaux

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2799019B2 (ja) * 1989-12-18 1998-09-17 株式会社東芝 圧延通路検査方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB932587A (en) * 1959-09-15 1963-07-31 South African Iron & Steel A method and means for the detection of cobble in continuous rolling mills
BE671339A (fr) * 1964-12-02 1966-04-22
FR2268609A1 (en) * 1974-04-26 1975-11-21 Fagueret Henri Safety device for woodworking machine - has plate over cutter raised and lowered by sensors actuated by workpiece
US4170121A (en) * 1978-05-11 1979-10-09 United States Steel Corporation Protective device for roll stands and the like
EP0020879A1 (fr) * 1979-06-06 1981-01-07 Erwin Sick GmbH Optik-Elektronik Détecteur de distance électro-optique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795402A (en) * 1970-06-09 1974-03-05 Digilux Corp Pin sensing system
US3983388A (en) * 1975-10-06 1976-09-28 Automation Systems, Inc. Apparatus for hardware item inspection
US4107539A (en) * 1977-03-16 1978-08-15 Jerry Kirsch Laser workpiece position and presence inspector and machine control governor
JPS5682475A (en) * 1979-12-10 1981-07-06 Toshiba Corp Rolling passage inspection device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB932587A (en) * 1959-09-15 1963-07-31 South African Iron & Steel A method and means for the detection of cobble in continuous rolling mills
BE671339A (fr) * 1964-12-02 1966-04-22
FR2268609A1 (en) * 1974-04-26 1975-11-21 Fagueret Henri Safety device for woodworking machine - has plate over cutter raised and lowered by sensors actuated by workpiece
US4170121A (en) * 1978-05-11 1979-10-09 United States Steel Corporation Protective device for roll stands and the like
EP0020879A1 (fr) * 1979-06-06 1981-01-07 Erwin Sick GmbH Optik-Elektronik Détecteur de distance électro-optique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997000148A1 (fr) * 1995-06-14 1997-01-03 Paul Wurth S.A. Commande a interrupteur inductif pour train de rouleaux

Also Published As

Publication number Publication date
US4477722A (en) 1984-10-16
ATA613380A (de) 1982-05-15
DE3167506D1 (en) 1985-01-10
EP0054535A3 (en) 1983-02-16
JPS628248B2 (fr) 1987-02-21
AT369591B (de) 1983-01-10
JPS57146413A (en) 1982-09-09
EP0054535B1 (fr) 1984-11-28

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