KR20070085061A - Continuous casting machine with a continuous casting die for casting liquid metals, particularly steel materials - Google Patents

Abstract

A continuous casting machine (1) for steel materials, comprising a continuous casting die (6) consisting of a casting mould (10) that is made of broad-sided plates (11) and narrow-sided plates (13), upon which piston cylinder units (16) are provided as actuators and support bearings, wherein the position thereof is measured by means of field measuring devices (21), the measuring data is stored via field bus modules (22) as BUS signals in a control unit (23) of the continuous casting machine (1) and can be returned post-processing as control signals to the actuators. According to the invention, in order to detect the measuring data locally on the continuous casting die (6) and enable local processing thereof, the respective hydraulic cylinder (16a) is connected to a valve stand (24) with a fixed terminal box (25) for the measuring signal and control signal lines (28) and the terminal box (25) is connected to an axis controller (30) enabling the field bus module (22) to guide the signals to a memory-programmable control unit (31).

Description

CONTINUOUS CASTING MACHINE WITH A CONTINUOUS CASTING DIE FOR CASTING LIQUID METALS, PARTICULARLY STEEL MATERIALS}

The present invention relates to a continuous casting machine comprising a continuous casting die for casting molten metal, in particular steel material. The continuous casting die includes a wide side plate that forms a casting mold. Between the wide side plates, narrow side plates that are adjustable on both sides are disposed to form a cast steel piece width in consideration of shrinkage of the cast steel piece. The narrow side plates are provided with two piston-cylinder units arranged vertically spaced apart as actuators and support bearings, respectively. The position of the piston-cylinder unit is measured via field measuring devices, the measurement data being transmitted to the BUS-line as a BUS-signal via the fieldbus module, stored in the control unit of the continuous casting machine, and after processing the control signal. It may be fed back to the actuator as.

Such continuous casting machines are known from WO 01/94052 A1. Said document describes, in a process computer of a control unit of a continuous casting system, a continuous casting machine for performing decentralized casting data processing of measurement data obtained via sensors in a continuous casting die. Distributed collection of measurement data further streamlines the measurement interval. In addition, such distributed collection allows measurement and control data to be collected in a cooled fieldbus module directly on a continuous casting die, delivered as a BUS signal to the BUS line, and stored at least in the control unit of the continuous casting system. Simplify measurement equipment by allowing them to be and / or processed

In order to adjust the piston rod or hydraulic cylinder fastened to the narrow side plate, the various signals to be generated and converted respectively near the hydraulic cylinder are electrically connected to the control circuit. The valve stand required for adjusting the hydraulic components is generally arranged in the hole support structure of the pouring platform area or below the injection platform (so-called on a fixed pedestal). The control unit is typically installed in the control chamber in the injection platform area. For field devices located in the region of a continuous casting die, a separator must be provided. This is because the continuous casting die must be able to be quickly dismantled and remounted. The measurement data can therefore be guided by the field measuring device only from the continuous casting die or from the valve stand into the control circuit of the control room. The distance to the control circuits in the control room is always very high, and data from four position sensors from each continuous casting die, ie data from four control valves, is transmitted to four synchronous serial interfaces and processed into twelve analog signals. .

It is an object of the present invention to collect and locally process measurement data of a continuous casting die area in cooled field devices.

The object is, in accordance with the present invention, a hydraulic cylinder of a piston-cylinder unit, respectively, in a valve stand, which is arranged in the region of the continuous casting die or in the region of the continuous casting control unit with a fixed terminal box for measuring signals and control signal lines. And the terminal box is connected to an axis controller, by which the field bus module is achieved by directing signals to a memory programmable control unit. As the spacing between modules becomes shorter, the benefits can be provided by reducing the cost of wiring. But the main advantage lies in the axis controller. This axis controller is a circuit based on a special microprocessor which is used to control the servo axis. The standard software used in the movement control unit incorporates real-time control for axis setting. The movement control unit is provided with an interface for the following equipment, for example:

A player- or step-position converter;

-Digital or analogue input or output;

A process field bus;

- network.

The movement control unit used for the application includes a remote control device and a data display device (display). Application software is standard software and is stored in recallable memory. The movement control unit can control a plurality of shafts (hydraulic piston-cylinder unit). Based on the graph menu, the movement control unit is adapted not only to the type of axis via the parameters but also to the type of position feedback. Programming is not required. The movement control unit receives the necessary set values and start movements through the field bus line terminals and feeds the contents back to the host system with position and relative display. Another advantage is provided by ensuring that data transfer between the memory programmable control unit and the axis controller is made in a non-critical state over time.

Application software modules can be standardized. Material costs, facility costs, and wiring costs over time can be reduced. Electrical fault sensitivity is reduced. Similarly, maintenance costs are reduced. The time required for assembly and start of operation is shortened.

Assembly and maintenance of the electronic device is simplified by the memory programmable control unit being connected to the field bus module using a removable plug type connector under the condition that the number of contacts corresponds.

In addition, the above advantages are achieved according to another embodiment by the position sensors respectively integrated in the hydraulic cylinders being connected via a plug type connector with a valve stand seated on the hole support structure.

Modules located near the hot zone are protected by internal cooling of the terminal box of the continuous casting die area according to another feature.

For cooling, it is generally proposed that coolant discharged from air or a continuous casting die is used as the refrigerant.

According to one refinement, the BUS lines and field bus modules, and the measurement and control signal lines are physically formed by optical waveguides, radio transmitters or infrared technology.

The invention is explained in more detail according to the embodiment shown in the following figures.

1 is a side view of an optional continuous casting machine having a hole support structure.

FIG. 2 is a vertical cross-sectional view cut away showing a continuous casting die provided with an adjustment device for narrow side plates.

3 is a schematic block diagram illustrating a continuous casting die with an open / close circuit.

<Description of main parts of drawing>

1: continuous casting machine 2: support roll stand

3: steel material 4: pouring ladle

5: tundish 6: continuous casting die

7: casting billet 8: roll segment

8a: first roll segment 9: vapor chamber

10: Casting mold of continuous casting die 11: wide side plate

12: casting slab width 13: narrow side plate

14: fixed block 15: adjusting device

16: piston-cylinder unit 16a: hydraulic cylinder

17: spring 18: clamping block

19: bracket 20: support frame

21: field measuring device 21a: integrated position sensor

22: fieldbus module 22a: BUS line

23: continuous casting control unit 24: valve stand

25: terminal box 26: control chamber

27: hole support structure 28: measurement signal and control signal line

29 plug type connector 30 axis controller

31: memory programmable control unit

32: dividing line

The continuous casting machine 1 according to FIG. 1 comprises a support roll stand 2. Within this support roll stand 2, a cast steel piece 7 starting from the molten steel material 3 and flowing from the injection ladle 4 through the tundish 5 and the continuous casting die 6 to be cooled outside It is additionally cooled while being protected. The support roll stand 2 consists of a plurality of roll segments 8, frequently up to 15 roll segments 8, of which the first roll segment 8a is a vapor chamber 9. Surrounded by. A continuous casting die 6 is located in front of the steam chamber 9, in which the casting molds 10 of the continuous casting die 6 are spaced apart from each other at a thickness interval of the cast steel pieces 7 to be produced according to FIG. 2. It consists of two wide side plates 11 facing each other. Between the wide side plates 11, narrow side plates 13, which are adjustable on both sides, are arranged to form a cast steel piece width 12 while considering the shrinkage of the cast steel pieces 7, and the narrow side plates 13 The two fixing blocks 14 are each provided with, for example, vertically spaced apart and arranged in parallel. The adjusting device 15 is arranged on both sides between the fixing blocks 14. The adjusting device 15 comprises a hydraulic piston-cylinder unit 16. The fixing block 14 has a spring 17 inside the clamping block 18. The fixing block 14 is mounted and supported on the bracket 19 supported by the support frame 20. The piston-cylinder unit 16 is simultaneously an actuator and a support bearing. The position of the two piston-cylinder units 16 with their own hydraulic cylinders 16a is measured via the field measuring device 21. The field measuring device 21 is composed of, for example, an integrated position sensor 21a and synchronization means necessary for sensor status, casting die encryption, maintenance cycles, etc., as well as left or right synchronization means, upper or lower synchronization means. . The desired measurement data is passed through each field bus module 22 to the BUS line 22a as a BUS signal, and through the valve stand 24 with the fixed terminal box 25, the continuous casting machine of the present application ( It is guided and stored into the continuous casting control unit 23 of 1) and fed back to the actuator as a control signal, ie to the hydraulic cylinder 16a, after processing. The control unit is located in the control chamber 26 of the control room securely fastened to the hole support structure 27.

The hydraulic cylinder 16a is connected to the valve stand 24 near the continuous casting die 6 or near the continuous casting control unit 23. The valve stand 24 may also be located near the control chamber 26 (FIG. 1). The valve stand 24 is provided with a terminal box 25, in which measurement signals and control signal lines 28 are guided. The measurement signal and control signal line 28 is connected with a plug type connector 29. The signals received from the valve stand 24 are processed in the connected axis controller 30 and transmitted via the field bus module 22 to the memory programmable control unit 31 located in the control chamber 26. .

The circuit block is again outlined in FIG. 3 for a modified embodiment of the actuator and support bearing (hydraulic cylinder 16a). The separation line 32 indicates that the valve stand 24 and the terminal box 25 are located close to the axis controller 30, and the measurement data obtained from the hydraulic cylinder 16a is connected via the plug type connector 29. To the axis controller 30 and then to the memory programmable control unit 31 in the control chamber 26 via the field bus module 22. In this connection the control unit 31 is no longer very far from the axis controller 30 according to the invention.

Claims (6)

Continuous casting machine 1 with a continuous casting die 6 for casting molten metal, in particular steel material, the continuous casting die 6 comprising a wide side plate 11 forming a casting mold 10. In addition, between the wide side plates 11, the narrow side plates 13 adjustable on both sides are disposed to form the cast steel piece width 12 while considering the shrinkage of the cast steel pieces 7, and the narrow side plates 13 There are provided two piston-cylinder units 16 arranged vertically spaced apart as actuators and support bearings, respectively, the position of the piston-cylinder units being measured via the field measuring device 21, the measurement data being measured The continuous main, which is transmitted via the module 22 to the BUS line 22a as a BUS signal and stored in the control unit 23 of the continuous casting machine 1 and fed back to the actuator as a control signal after processing. In the group (1), The hydraulic cylinder 16a of the piston-cylinder unit 16 has a fixed terminal box 25 for measuring signals and control signal lines 28, in the region of the continuous casting die 6 or in continuous casting. Each of which is connected to a valve stand 24 disposed in an area of the control unit 23, the terminal box 25 is connected to an axis controller 30, and the field bus module 22 is connected by an axis controller 30. Continuous casting machine, characterized in that it directs the signal to the memory programmable control unit (31). 2. Continuous casting machine according to claim 1, characterized in that the memory programmable control unit (31) is connected to the field bus module (22) using a removable plug type connector (29) under the condition that the number of contacts is corresponding. The position sensor (21a) integrated in the hydraulic cylinder (16a), respectively, is connected to a valve stand (24) seated on the hole support structure (27) via a plug type connector (29). Continuous casting machine characterized in that the. 2. Continuous casting machine according to claim 1, characterized in that the terminal box (25) is internally cooled in the region of the continuous casting die (6). The continuous casting machine according to claim 1 or 4, wherein air or cooling water discharged from the continuous casting die (6) is used as a refrigerant. The method of claim 1, wherein the BUS line 22a and the field bus module 22 as well as the measurement signal and control signal line 28 are physically formed by an optical waveguide, a radio transmitter, or infrared technology. Continuous casting machine.

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