EP0063285B1 - Vorrichtung zum wiederholten Abgiessen flüssiger Metallmengen aus einem Vorratsgefäss - Google Patents

Vorrichtung zum wiederholten Abgiessen flüssiger Metallmengen aus einem Vorratsgefäss Download PDF

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Publication number
EP0063285B1
EP0063285B1 EP19820102812 EP82102812A EP0063285B1 EP 0063285 B1 EP0063285 B1 EP 0063285B1 EP 19820102812 EP19820102812 EP 19820102812 EP 82102812 A EP82102812 A EP 82102812A EP 0063285 B1 EP0063285 B1 EP 0063285B1
Authority
EP
European Patent Office
Prior art keywords
control device
digital
memory
analog
value transmitter
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.)
Expired
Application number
EP19820102812
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0063285A3 (en
EP0063285A2 (de
Inventor
Gerd Wilhelm Dipl.-Ing. Drees
Jan Dr. Fabianowski
Rober Ing. Grad. Ibach
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.)
BBC Brown Boveri AG Germany
Original Assignee
Brown Boveri und Cie AG Germany
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 Brown Boveri und Cie AG Germany filed Critical Brown Boveri und Cie AG Germany
Publication of EP0063285A2 publication Critical patent/EP0063285A2/de
Publication of EP0063285A3 publication Critical patent/EP0063285A3/de
Application granted granted Critical
Publication of EP0063285B1 publication Critical patent/EP0063285B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D39/00—Equipment for supplying molten metal in rations

Definitions

  • the invention relates to a device for automatically controlling a stopper for repeated pouring of liquid metal quantities from a storage vessel, the stroke of the stopper being influenced as a function of time to adapt the outflow rate to the swallowing capacity of the casting mold.
  • the pouring time and the lifting height of the stopper and thus indirectly the pouring speed can be analog, e.g. be specified by a potentiometer or digitally.
  • the adjustment of the setting elements, e.g. the potentiometer is generally not a problem for the operating personnel.
  • the object of the invention is to simplify the setting of a new casting curve for the operating personnel and at the same time to achieve an optimal adaptation of the casting curve to the swallowing capacity of the casting mold. If possible, the casting curve should correspond to a manually controlled casting curve.
  • an operating lever for manually actuating the stopper mechanically on a potentiometer or the like acts as a setpoint generator, that this setpoint generator is connected to a memory for storing the setpoint generator position as a function of time and that a device for plug actuation during manual pouring can be connected to the setpoint generator via a switching device or during automatic pouring with the output of the memory and during interconnection of the setpoint generator with the device for plug actuation, the setpoint generator position can be stored as a function of time.
  • a changeover switch is provided, with which the switch is made to either manual or automatic pouring. Furthermore, a switch is provided in the transmitter, with which a control pulse is given to an electronic logic when the operating lever is moved from the zero position, which signals the start of the casting.
  • the memory itself which is advantageously designed as a digital memory, is connected via an analog-digital converter to a potentiometer as a setpoint generator and via a digital-analog converter to the control device for actuating the stopper.
  • the electrical connection between the setpoint generator and the control device for actuating the stopper can run via the analog-digital converter and the digital-analog converter, but the setpoint generator can also be connected directly to the control device for the plug actuation.
  • the analog-digital or the digital-to-analog converter can be saved when an angle encoder or the like is used as the setpoint generator. is used or if the plug actuation device can be controlled with digital values. Even when using a potentiometer as a setpoint generator, the analog-to-digital and digital-to-analog converters can be avoided if an analog memory is used as the memory.
  • the control devices shown in Figures 1 to 4 each contain three modules: a transmitter 1, an electronic switching device 5 and a device 6 for plug actuation.
  • the transmitter 1 contains a potentiometer 4 and a switch 3.
  • the potentiometer is actuated by the operating lever 2.
  • the switch 3 is actuated.
  • further switches can be provided which are actuated in different positions of the operating lever, i.e. be closed or opened.
  • the switch 3 arranged in the transmitter 1 is connected to an electronic logic circuit 13, which in the present case generates a sampling frequency for sampling the setpoint generator position.
  • This electronic logic circuit can also be used for other switching operations.
  • the sampling frequency generated in the logic circuit 13 is fed to the memory 26.
  • the device for plug actuation 6 consists essentially of an electromagnetic converter 7, which converts the electrical signal into a proportional movement and moves the plug 8 via a linkage 11.
  • the pouring opening 10 in the casting container 9 is e.g. an oven or the like changed according to the given casting curve.
  • a signal proportional to the position of the potentiometer 4 is fed via line 18 to the analog digital converter 17.
  • the output of the analog-digital converter 17 is via the line 19 connected to a contact of the switch 15.
  • the analog-digital converter 17 is connected via line 20 to the memory 26 and its output is connected via line 21 to the second contact of the changeover switch 15.
  • the changeover switch 15 is connected to the input of the digital / analog converter 22, the output of which is connected to a summing element 23.
  • a value for the basic level that can be set on the potentiometer 24 is also fed to the summing element 23.
  • the switch 14 is used to set whether the casting process is to be carried out manually using the operating lever 2 or automatically by querying the casting curve stored in the memory 26. Via the connection 16, the changeover contact 15 is switched accordingly and a corresponding signal is sent to the electronic logic circuit 13, so that in manual operation the casting curve is simultaneously stored in the memory 26 via the line 20, while in automatic operation the stored curve is stored over the line 21 is given to the control device for the plug actuation.
  • FIG. 2 differs from FIG. 1 only in the arrangement of the analog-digital converter 17 and the digital-analog converter 22.
  • the output of the encoder 1 connected to the potentiometer 4 is connected directly via line 27 to the contact of the switch 15, which in turn is connected directly communicates with the summer 23.
  • a parallel branch leads from the output connected to the potentiometer 4 via the line 28 to the analog-digital converter 17 via the memory 26 to the analog-digital converter 17 via the memory 26 to the digital-analog converter 22, and from there to the second contact of the changeover switch 15.
  • a sampling frequency of 10 Hz is generally sufficient, since this is generally much higher than the maximum frequency of the plug.
  • a digital, angle-coded setpoint generator 32 is used as the setpoint generator for the casting curve.
  • the digital memory 26 can be controlled directly via the line 30.
  • the output of the memory is connected to a contact of the switch 15.
  • the other contact of the switch is connected via line 27 to the output of the digital setpoint generator 32.
  • a component with digital control is used as the summing element 33. This saves a digital-to-analog converter and an analog-to-digital converter.
  • a digital transmitter is also used as the basic level transmitter 35.
  • the electromagnetic converter 36 can also be controlled digitally.
  • FIG. 4 shows a further exemplary embodiment of the invention with an analog setpoint generator 4, which is connected to the summing element 23 via the line 27 and the changeover switch 15, as in FIG. 2.
  • the output of potentiometer 4 is connected via line 30 to an analog memory 34, the output of which is connected via line 31 to a contact of switch 15.
  • Casting curves can be saved if casting is to be carried out in molds with different swallowing capacities.
  • An identifier for the respective casting curve can be attached to the casting mold, which may can be queried automatically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feedback Control In General (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
EP19820102812 1981-04-10 1982-04-02 Vorrichtung zum wiederholten Abgiessen flüssiger Metallmengen aus einem Vorratsgefäss Expired EP0063285B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3114562 1981-04-10
DE19813114562 DE3114562A1 (de) 1981-04-10 1981-04-10 Vorrichtung zum wiederholten abgiessen fluessiger metallmengen aus einem vorratsgefaess

Publications (3)

Publication Number Publication Date
EP0063285A2 EP0063285A2 (de) 1982-10-27
EP0063285A3 EP0063285A3 (en) 1983-02-16
EP0063285B1 true EP0063285B1 (de) 1985-08-14

Family

ID=6129885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820102812 Expired EP0063285B1 (de) 1981-04-10 1982-04-02 Vorrichtung zum wiederholten Abgiessen flüssiger Metallmengen aus einem Vorratsgefäss

Country Status (3)

Country Link
EP (1) EP0063285B1 (enrdf_load_stackoverflow)
JP (1) JPS57177877A (enrdf_load_stackoverflow)
DE (1) DE3114562A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3608503C2 (de) * 1986-03-14 1994-09-01 Stopinc Ag Verfahren zum automatischen Angießen eines Stranges einer Stranggießanlage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3620294A (en) * 1969-07-11 1971-11-16 Trw Inc Semiautomatic metal casting apparatus
US3693066A (en) * 1970-08-24 1972-09-19 Computervision Corp Natural feeling common drive plotter-digitizer
US3920972A (en) * 1974-07-16 1975-11-18 Cincinnati Milacron Inc Method and apparatus for programming a computer operated robot arm

Also Published As

Publication number Publication date
EP0063285A3 (en) 1983-02-16
DE3114562C2 (enrdf_load_stackoverflow) 1987-12-10
EP0063285A2 (de) 1982-10-27
JPH0317587B2 (enrdf_load_stackoverflow) 1991-03-08
JPS57177877A (en) 1982-11-01
DE3114562A1 (de) 1982-10-28

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