ZA200606087B

ZA200606087B - Continuous casting machine with a continuous casting for casting liquid metals, particularly steel materials

Info

Publication number: ZA200606087B
Application number: ZA200606087A
Authority: ZA
Inventors: Dumitriu Bujor; Paul-Christian Hopp; Christian Geerkens; Hans Esau Klassen; Ronald Wilmes
Original assignee: Sms Demag Ag
Priority date: 2004-12-03
Filing date: 2006-07-24
Publication date: 2007-06-27
Also published as: CN100591441C; RU2006132922A; JP2008521617A; DE102004058355A1; CN101068638A; CA2583655A1; US20080093048A1; RU2388574C2; TW200624195A; WO2006058740A1; KR20070085061A; EP1833630A1; UA80657C2

Description

CONTINUOUS CASTING MACHINE WITH A CONTINUOUJS

CASTING DIE FOR CASTING LIQUID METALS, PARTICULA.RLY

STEEL MATERNALS .

The inveration is directed to a continuous casting machine with a continuous casting die for casting liquid metals, particularly steel material s, with broad-side plate=s which form the casting mold and between which are arranged at both sides nar-row-side plates which can be acljusted to form the continu cus casting width so that the shrinkage of the cast st-rand is taken into account and at which two pisto_n-cylinder units, which are spac~ed apart vertically, are pro~vided as actuators and support bearings whose positiom is measured by field measurement de=vices, with the measurement dat-a being conveyed in a BUS line as BUS signals boy fieldbus modules and stored i_n a control of the continuous casting machine and are fed back to the actuator=s as control signals after processing.

A continueous casting machine of the type . mentioned above is know from

WO 01/94052 A 1, which describes a continuous casting machine for locali_zed casting data processing of the measurement data obtained at a continuous casting die by sensors. Whe processing of the casting data is carried out in a process computer of the control system of the continuous casting installation. Localized reception of mea surement data increases the efficiency of the measuring pa-th and simplifies the me=asuring devices in that the meas.urement data and control data are collected directly on the continuous casting d.ie in cooled fieldbus modules, transferred as BUJS signals in a BUS line, and stoered and/or processed at least in the control systerm of the continuous casting instamllation.

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In order to adjust a piston rod that is articulated at the rarrow-side plate or=

R tos adjust a hydraulic cylinder, different signals which occur amd must be converted in the vicinity of the hydraulic cylinder must be ele=ctrically connected tos a regulating circuit. The valve stand which is required for -adjusting the hwydraulic components is generally arrange=d at the shop frame=work in the area of” th_e casting platform or below the latter (om so-called solid ground). The control equipment is usually installed in the area of the casting platfomm in the control rosom. It is important that there is a separaation for the field de vices in the area of th e continuous casting die because the coratinuous casting die must be dismantled amd reassembled quickly. Therefore, the measurement data caan be supplied to the cosntrol circuit in the control cabin by the field measurement d_evices only from thee continuous casting die or from the valwe stand. The distarmce to the control circuit in the control cabin is still very great and data from foumr position transmitters, four regulating valves in four- synchronous serial interfaces and twelve analog signals must be processed for each continuous casting die.

It is the object of the invention to ac=quire the measuremsent data in the area of the continuous casting die in cooled fiel d devices and to process this data locally.

According to the invention, the abowe-stated object is achieved by comnnecting the respective hydraulic cylinder of the piston-cylimnder units to a vallve stand which is arranged in the area of the continuous cassting die or the comtinuous casting control and which has am stationary terminal. box for the mesasurement signal lines and control signaul lines, and by conn_ecting the terminal bo=x to an axis regulator from which the fieldbus module supplies signals to a ~mesmory-programmable control. In this wary, cabling is advantzageously reduced ancl the distances between the component a_ssemblies are shortezd. But the chief adwantage consists in the axis regulators. T he axis regulators amre circuits which

TAFileS\26\1 033261207,716 pat appln Continuous Casting Machine ...03 21 07.doc are based on special microprocessors and are used for controlling servo-axes. . The standamrd software in the movement control adds a real-time ceontrol for the axis adjustament. For example, the movement control includes interfaces for: — machines transducers or incremental position transducers, — digital Or analog inputs or outputs, — aPROFTIBUS, — anetwork.

The mmovement control used for the application comprises a remote control and a data display device. The application_ software is standard and is stored in a retrievable memory. The movement control is capable of controlling a plurality of axes (hyadraulic piston-cylinder units). On the basis of a graphic menu, the movement control is adapted to the type of axis and to the type of position : feedback by parameters. Programming is mot necessary. The movement control receives thes required reference values and sstarting movement via the fieldbus line connection -and feeds them back to the mas ter system with the posistion and a status readirag. Further advantages consist in that the transmission -of data between thes memory-programmable controel and the axis regulator Js non-critical with respec to time and is reliable.

Application software modules can be standardized. The cost of material, installation costs and the time spent on placing cable can be reducecd.

Susceptibilitty to electrical interference is resduced. Maintenance cozsts are likewise reduced. The time required for assembly and operation startup is reduced.

Assembly and maintenance of the ele=ctronics are simplified in that the ~memory-pro grammable control is connectecd to the fieldbus module by means of a detachable plug-in connection with a correzsponding quantity of contacts.

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According to another embodiment, the same advantamges are ach _ieved in . that position transmitters which are intesgrated in the hydraulic cylinde-rs are connected to the valve stand at the shop framework by the gplug-in connection.

Assemblies located in the vicinit-y of the heating zonee are protec=ted according to further features in that the interior of the terminal boxes imn the area of the continuous casting die is cooled.

Generally, for purposes of coolin_g, either air or cooling water which is tapped off from the continuous casting «die is used as coolant.

In a further development, the BUS line, fieldbus module and me asurement 1 0 signal lines and control signal lines are physically formed by light waveeguides or wireless transmission or infrared technology.

Embodiment examples of the inv ention are shown in the drawings and described more fully below.

Figure 1 shows a side view of a continuous casting m _achine of amy type, 1:5 including the shop framework;

Figure 2 shows a vertical cross se=ction through a cont=inuous cast-ing die with narrow-side plate adjusting device; and

Figure 3 shows a simplified block= diagram of the continuous casting die with circuits.

The continuous casting machine 1. according to Figure 1 has a sugpporting roll stand 2. The casting strand 7 of liqu_id steel material 3 w=hich flows from a casting ladle 4 through a tundish 5 and a. continuous casting edie 6 and w~hich is cooled on the outside is supported and further cooled in the ssupporting roll stand 2. The supporting roll stand 2 comprises a plurality of roll segmerts 8, often up to fifteen roll segments 8, the fimrst roll segment 8a b eing enclosed by a steam chamber 9. The continuous castin_g die 6 is located in front of the steam

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chamber 9. The casting mold 10 of the continuous casting die 6 according to . Figure 2 comprises two broad-sicle plates 11 which are located opposite one another at a distance corresponding to the thickness of the strarad 7 to be cast.

Narrow-side plates 13 which are adjustable for forming the cas-ting strand 5 width 12 while taking into account the shrinkage of the casting strand 7 are arranged on both sides between the broad-side plates 11 and, for example, two parallel fastening blocks 14 which are spaced apart vertically anre provided at the narrow-side plates 13. The adjusting devices 15 having hydrau_lic piston-cylinder units 16 are arranged between the fastening blocks 14 on both ssides. The fastening blocks 14 comprise springs 17 within a clamping block 18 and are supported on arms 19 carried by a supporting frame 20. The pi=ston-cylinder unit 16 is an actuator and a support bearing simultaneously. Th-e position of the two piston-cylinder units 16 with their hydraulic cylinders 16a &s determined by field measurement devices 21 whi ch comprise, for example, intsegrated position transmitters 21a, synchronization devices for the left side or righht side, for top or bottom, for the status of the sensoxs, a die code, maintenance cycles, and the like.

The measurement data obtained are transferred by the respectiv—e fieldbus modules 22 in a BUS line 22a as BUS signals, conducted in a continuous casting control 23 of the continuous castirag machine 1 through a valve =stand 24 with a stationary terminal box 25, stored and, after being processed, fecd back to the actuators, i.e., for example, the hydraulic cylinders 16a, as contr ol signals. The control is located in a control room 26 of a control cabin which is fixedly connected to the shop framework 27.

The hydraulic cylinders 16a are connected to the valve stamnd 24 in the vicinity of the continuous casting die 6 or the continuous castingz control 23. The valve stand 24 can also be located dn the vicinity of the control room 26 (Fig. 1).

The valve stand 24 contains the terminal box 25 to which the me=asurement signal lines and control signal lines 28 are fed. The measurement signasl lines and control signal lines 28 are provided with plugz-in connections 29. The si gnals . arriving from the valve stand 24 are processead in a conne=cted axis regulator 30 and conveyed by ~the fieldbus module 22 to a :memory-prcgrammable control 31 located in the control room 26.

The circuit blocks are shown once agai in a simpl: ified manner im Figure 3 for a modified em_ bodiment form of the actuat-ors and sup-port bearings (hydraulic cylinders 16a). Thhe separating line 32 expres=ses the prox_imity of the vallve stand 24 and term-inal box 25 to the axis regul-ator 30. The measurement data obtained from the hydraulic cylinders 16a are conducted wia the plug-in connections 29 into the axis regulator 30 and wia the field bus module 22 to the memory-programrnable control 31, no longer —far away, in the control rooem 26.

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List of Refereence Numerals . 1 continmious casting machine 2 supporting roll stand 3 steel material 4 castings ladle 5 tundishh 6 continous casting die 7 castings, strand 8 roll segments 8a first roll segment 9 steam chamber 10 casting. mold of the continuous casting die 11 broad-sside plate 12 casting strand width 13 narrow -side plate 14 fastenirag block 15 adjustirag device 16 piston-acylinder unit 16a hydraullic cylinder 17 springs 18 clampirmg block 19 arm 20 supportzing frame 21 field me=asurement device 21a integrat-ed position sensor 22 fieldbus module 22a BUS lire

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23 continu ous casting control - 24 valve stand ) 25 terminal box 26 control room 27 shop framework 28 measureement signal line and control signal line 29 plug-in connection 30 axis regulator 31 memorys-programmable control 32 separating line

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Claims

CLAIMS . 1. A continuous castimg machine (1), comprising a continuous casting die (6) for casting liquid metals, particularly steel materials, with broad-side plates C11) forming the casting rnold (10), narrow-side plates (13) which are adjusta_ble for forming the casting strand width (12) while takzing into account the shrinkage of the casting strand ((7) and are arranged on both sides between the broad-sside plates (11); and two ppiston-cylinder units (16), whaich are spaced apart vertically, provided at the narrowv-side plates (13) as actuators and support bearingzs, the position of the pist on-cylinder units (16) being rneasured by field measur-ement devices (21), the measurement data being transferred via fieldbus module=s (22) in a BUS line (22a) as BUS signals and stored i n a control (23) of the continuous casting machine 1) and, after being processed, fed back to the actuatomrs as control signals, characterized in that the hydmraulic cylinder (16a) of the piston-cylinder units (16) iss connected in each instance= to a valve stand (24) whaich is arranged in the area of the continuous casting edie (6) or the continuous casting control (23) and which has a stationary terminal box (25) for the measurement signal lines and control signal lines (28), and in tknat the terminal box (25) is connected to an axis regulator (30) from which tle fieldbus module (22) s upplies the signals to a memory-programmable control (C31).
2. A continuous castingg machine according to claim 1, characterized in that TA\Files\2611033 222 6207,716 pat appln Continuous Casting Machine= .,.03 21 07.doc the memory-preogrammable control (31) is connected to the fieldbus module (22) . by means of a deetachable plug-in connection (29) with as corresponding quantity of contacts.
3. A continuous casting machine according to claims 1 and 2, characterized in that position transmitters (21a) which are integrated in the hydraulic cylinders (16a), are connected to- the valve stand (24) at the shop framework (27) by the plug-in connection (29).
4, A continuous casting machine according to claim 1, characterized in that the interior of thee terminal boxes (25) in the area of the c=ontinuous casting die (6) is cooled.
5. A ceontinuous casting machine according to claims 1 and 4, characterized in shat either air or cooling water which is tapped off from the ceontinuous casting die (6), is used ass coolant.
6. A continuous casting machine according to claim 1, characterized in that the BUS line (22:3), the fieldbus module (22) and the meassurement signal lines and control signa:l lines (28) are physically formed by ligknat waveguides or wireless transmiszsion or infrared technology. T:\Files\261103326\207,716 pat appl Continuous Casting Machine .,.03 21 07.doc