JPS6333936B2 - - Google Patents
Info
- Publication number
- JPS6333936B2 JPS6333936B2 JP25645484A JP25645484A JPS6333936B2 JP S6333936 B2 JPS6333936 B2 JP S6333936B2 JP 25645484 A JP25645484 A JP 25645484A JP 25645484 A JP25645484 A JP 25645484A JP S6333936 B2 JPS6333936 B2 JP S6333936B2
- Authority
- JP
- Japan
- Prior art keywords
- speed
- casting speed
- value
- torque
- casting
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は鋳片移動路の両側に複数台の駆動ロー
ルを配置して鋳片の引抜きを行う連続鋳造設備に
おける鋳片引抜装置の制御方法に関するものであ
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for controlling a slab drawing device in continuous casting equipment in which a plurality of drive rolls are arranged on both sides of a slab moving path to pull slabs. It is related to.
第１図は公知の鋳片引抜装置の断面図を示すも
ので、レードル１からタンデイツシユ２及びモー
ルド３を通つた鋳片４は通路の両側に配置した〇
で表わした非駆動ロールと、交流電動機で駆動さ
れる〓で表わした駆動ロールによつて引抜かれ
る。
FIG. 1 shows a sectional view of a known slab drawing device, in which the slab 4 that has passed from the ladle 1 through the tundish 2 and mold 3 is moved between non-driving rolls (marked with circles) placed on both sides of the passage and an AC motor. It is pulled out by a drive roll represented by 〓, which is driven by .
第２図は、前記各駆動ロールを駆動する交流電
動機の全部を一つの制御装置によつて駆動する従
来公知の制御装置を示すもので、各駆動交流電動
機毎に、それと連結された速度検出発電機の検出
電圧を用いて速度制御運転が行なわれるが、次の
ような問題がある。なお第２図中、５は電源装
置、６はトルク制御器、７は電流トルク変換器、
８は速度制御器、９は変流器である。 FIG. 2 shows a conventionally known control device in which all of the AC motors that drive the drive rolls are driven by one control device. Speed control operation is performed using the detected voltage of the machine, but there are the following problems. In FIG. 2, 5 is a power supply device, 6 is a torque controller, 7 is a current-torque converter,
8 is a speed controller, and 9 is a current transformer.
即ち、鋳片引抜装置に用いられる駆動ロール駆
動用交流電動機は、ほぼ等容量であるため、特定
の電動機をマスターとし、他の電動機をヘルパー
として運転することは不可能である。したがつ
て、各電動機をマスターとして運転するわけであ
るが、全ての電動機は鋳片或いはダミーバを介し
て機械的に連結されているため、各制御装置の速
度制御ゲインを高くとり、高精度制御を行うこと
は、各電動機間の負荷バランスの調整が因難とな
る欠点がある。したがつて、この方式では速度制
御ゲインを或る程度犠性にせざるを得ず、操業上
必要な制御精度が得られない虞れがある。 That is, since the AC motors for driving the drive rolls used in the slab drawing device have approximately the same capacity, it is impossible to operate a specific motor as a master and other motors as helpers. Therefore, each electric motor is operated as a master, but since all electric motors are mechanically connected via slabs or dummy bars, the speed control gain of each control device is set high to achieve high precision control. However, this method has the disadvantage that it becomes difficult to adjust the load balance between each motor. Therefore, in this method, the speed control gain has to be sacrificed to some extent, and there is a possibility that the control accuracy necessary for operation cannot be obtained.
本発明は上記の欠点を改善するためになされた
もので、鋳片移動路の両側に複数台の駆動ロール
を配置し、それらの駆動ロールを、トルク制御器
を備えた専用の制御装置によつて各個に駆動して
鋳片の引抜きを行う連続鋳造設備における鋳片引
抜装置において、適数の駆動ロールに鋳造速度検
出器を取付け、それら鋳造速度検出器により検出
された速度信号の中から、検出値の大きい順に数
個の検出値を選択し、更にその最大値を除いた検
出値の平均値又はその選択検出値中の最小値を鋳
造速度検出値とし、この鋳造速度検出値を鋳造速
度指令値と比較し、その両者の差を各駆動ロール
の前記トルク制御器にトルク指令として授与し、
各駆動ロールはトルク制御されながら、鋳片引抜
装置全体としては速度制御されるようにしたもの
である。
The present invention has been made to improve the above-mentioned drawbacks, and includes a plurality of drive rolls arranged on both sides of the slab moving path, and these drive rolls are controlled by a dedicated control device equipped with a torque controller. In a slab drawing device in continuous casting equipment in which the slabs are pulled out by driving each roller individually, casting speed detectors are attached to an appropriate number of drive rolls, and from among the speed signals detected by the casting speed detectors, Select several detected values in descending order of detected values, and then use the average value of the detected values excluding the maximum value or the minimum value among the selected detected values as the casting speed detection value, and use this casting speed detection value as the casting speed. Compare with a command value and give the difference between the two as a torque command to the torque controller of each drive roll,
While the torque of each drive roll is controlled, the speed of the slab drawing device as a whole is controlled.
以下本発明の実施例を図面に基づき説明すれば
次の通りである。
Embodiments of the present invention will be described below based on the drawings.
第３図は本発明の実施例を示すもので、全駆動
ロールM1〜M12に速度検出発電機TG1〜TG12を
取付け、これらにより検出された電圧から、電圧
が正の場合は最大値検出制御器１０により大きい
順に３個選び、更にこの３個の電圧から最小値検
出制御器１１によつて最小値のものを選び出し、
これを鋳造速度とするものである。 FIG. 3 shows an embodiment of the present invention, in which speed detection generators TG 1 to TG 12 are attached to all drive rolls M 1 to M 12 , and from the voltage detected by these, when the voltage is positive, the maximum The value detection controller 10 selects three voltages in descending order, and from these three voltages, the minimum value detection controller 11 selects the one with the minimum value.
This is taken as the casting speed.
即ち、最小値検出制御器１１によつて選択され
た検出電圧は、切換制御器１４を介して得られた
速度信号Niと速度指令信号Nsの差を共通速度制
御器１７′に入力し、その偏差信号を共通速度制
御器１７′により増幅して得られた出力信号を各
電動機のトルク指令として分配する。 That is, the detected voltage selected by the minimum value detection controller 11 is determined by inputting the difference between the speed signal Ni obtained via the switching controller 14 and the speed command signal Ns to the common speed controller 17'. The output signal obtained by amplifying the deviation signal by the common speed controller 17' is distributed as a torque command to each electric motor.
なお最小値を検出する代りに、３個の検出電圧
の中の最大値を除き、残りの２個の平均値を鋳造
速度としてもよい。 Note that instead of detecting the minimum value, the maximum value among the three detected voltages may be removed and the average value of the remaining two may be used as the casting speed.
この発明の実施例において、最大値検出制御器
１０により大きい順に３個の検出電圧を選ぶの
は、断線或いは検出器自体の故障で出力電圧が異
常に低下している速度検出信号を鋳造速度帰環信
号から除くためであり、次に最小値検出制御器１
１によつて前記３個の検出電圧から最小値のもの
を選び出して、それを鋳造速度とするのは駆動ロ
ールと鋳片間にスリツプが発生して回転数が増加
している駆動ロールに連結されている速度検出器
の速度検出信号を鋳造速度帰環信号から除去する
ためであつて、この方式によれば従来の方式に比
し安定した鋳造速度による制御が行なわれること
になる。 In the embodiment of the present invention, the reason why the maximum value detection controller 10 selects the three detection voltages in descending order is that the speed detection signal whose output voltage has abnormally decreased due to wire breakage or a failure of the detector itself is returned to the casting speed. This is to remove it from the ring signal, and then the minimum value detection controller 1
1 selects the minimum value from the three detected voltages and uses it as the casting speed.The reason is to connect the drive roll whose rotational speed is increasing due to a slip between the drive roll and the slab. The purpose of this method is to remove the speed detection signal of the speed detector from the casting speed return signal, and according to this method, control using a more stable casting speed can be performed than in the conventional method.
第３図に示す実施例のごとく、各駆動ロール或
は電動機M1〜M12に取付けられた速度検出発電
機TG1〜TG12より第１鋳造速度Niを検出し、こ
れを速度指令信号Nsと比較し、両者の差を共通
速度制御器１７′に入力させ、その偏差信号を１
７′により増幅して得られた出力信号を各電動機
のトルク指令として分配する。 As in the embodiment shown in FIG. 3, the first casting speed N i is detected from speed detection generators TG 1 to TG 12 attached to each drive roll or electric motor M 1 to M 12 , and this is used as a speed command signal. N s , the difference between the two is input to the common speed controller 17', and the deviation signal is
The output signal obtained by amplification by 7' is distributed as a torque command to each electric motor.
この場合、鋳片のシエル厚に応じた必要な引抜
きトルクに比例して分配すれば理想的な鋳片の引
抜きが行なわれる。 In this case, if the necessary drawing torque is distributed in proportion to the shell thickness of the slab, the ideal slab can be pulled out.
そして、各電動機の制御装置は、このトルク指
令に基づき、トルク制御で電動機M1〜M12を運
転する。 Then, the control device for each electric motor operates the electric motors M 1 to M 12 under torque control based on this torque command.
即ち、ロールを駆動する各電動機駆動制御装置
では各駆動ロールの負荷を均等になるように制御
するためのトルク制御を行い、鋳片引抜装置全体
としては、鋳造速度帰環回路によつて選択された
信号を代表帰環信号とする鋳片の速度制御が行わ
れる。 That is, each electric motor drive control device that drives the rolls performs torque control to equalize the load on each drive roll, and the casting speed return circuit as a whole performs torque control to control the load on each drive roll. The speed of the slab is controlled using the signal as a representative return signal.
速度制御器１７′のゲインは、操業に必要な精
度を得るまで大きくすることが可能で、グループ
全体として精密な速度制御による鋳造が可能であ
る。 The gain of the speed controller 17' can be increased until the accuracy required for operation is achieved, allowing casting with precise speed control for the group as a whole.
なお、この方式で駆動ロールにスリツプが発生
すると、負荷が軽減して電流トルク変換器７の出
力が減少する。この場合、トルク指令値との差が
大きくなるため、トルク指令が正のときは電動機
が加速されて過速度になる虞があるが、この実施
例ではそれを防止するため、過速防止制御器１９
が装備されている。 Note that if slip occurs in the drive roll in this method, the load is reduced and the output of the current-torque converter 7 is reduced. In this case, the difference with the torque command value becomes large, so when the torque command is positive, there is a risk that the electric motor will be accelerated and overspeed; however, in this embodiment, in order to prevent this, the overspeed prevention controller is installed. 19
is equipped.
この過速防止制御器１９の入力には、鋳造速度
指令値Nsと速度検出発電機の出力電圧との差を
とる向きで与える。 The input of this overspeed prevention controller 19 is given in the direction of taking the difference between the casting speed command value Ns and the output voltage of the speed detection generator.
したがつて、速度検出発電機の出力電圧が鋳造
速度指令値Nsに等しいか、或いは近い値にある
時は、過速防止制御器１９の出力は零である。と
ころが、速度検出電機電圧が、予め設定されたレ
ベルを越えて鋳造速度指令値よりずれると、過速
防止制御器１９から、駆動ロールの速度を鋳造速
度指令に引き戻す方向の出力が送出され、所定の
鋳造速度で鋳片引抜装置が運転されるように制御
される。 Therefore, when the output voltage of the speed detection generator is equal to or close to the casting speed command value Ns , the output of the overspeed prevention controller 19 is zero. However, when the speed detection electric voltage exceeds a preset level and deviates from the casting speed command value, the overspeed prevention controller 19 sends out an output in the direction of returning the speed of the drive roll to the casting speed command. The slab drawing device is controlled to operate at a casting speed of .
以上のように本発明によれば、各駆動電動機の
負荷の分担が変らないように制御できるほか精度
の高い運転を行うことが出来るもので、実用上連
続鋳造設備における鋳片引抜装置の制御方法とし
て好適なものである。
As described above, according to the present invention, it is possible to control the load sharing of each drive motor so that it does not change, and also to perform highly accurate operation. It is suitable as
第１図は公知の鋳片引抜装置の断面図、第２図
は各個電源方式によるその制御装置の電気回路
図、第３図は本発明実施例の電気回路図である。
M1〜M12……駆動電動機、TG1〜TG12……速
度検出発電機、R1〜R12……縦電器接点、５……
電源装置、６……トルク制御器、７……電流トル
ク変換器、８……速度制御器、９……変流器、１
０及び１３……最大値検出制御器、１１及び１２
……最小値検出制御器、１４……切換制御器。
FIG. 1 is a sectional view of a known slab drawing device, FIG. 2 is an electric circuit diagram of its control device using an individual power supply system, and FIG. 3 is an electric circuit diagram of an embodiment of the present invention. M1 to M12 ...Drive motor, TG1 to TG12 ...Speed detection generator, R1 to R12 ...Vertical electrical contact, 5...
Power supply device, 6...torque controller, 7...current torque converter, 8...speed controller, 9...current transformer, 1
0 and 13... Maximum value detection controller, 11 and 12
...Minimum value detection controller, 14...Switching controller.
Claims (1)
置し、それらの駆動ロールをトルク制御器を備え
た専用の制御装置によつて各個に駆動して鋳片の
引抜きを行う連続鋳造設備における鋳片引抜装置
において、適数の駆動ロールに鋳造速度検出器を
取付け、それら鋳造速度検出器により検出された
速度信号の中から、検出値の大きい順に数個の検
出値を選択し、更にその最大値を除いた検出値の
平均値又はその選択検出値中の最小値を鋳造速度
検出値とし、この鋳造速度検出値を鋳造速度指令
値と比較し、その両者の差を各駆動ロールの前記
トルク制御器にトルク指令として授与し、各駆動
ロールはトルク制御されながら、鋳片引抜装置全
体としては速度制御されるようにしたことを特徴
とする連続鋳造設備における鋳片引抜装置の制御
方法。1. Continuous casting equipment in which a plurality of drive rolls are arranged on both sides of a slab moving path, and each drive roll is driven individually by a dedicated control device equipped with a torque controller to draw slabs. In a slab drawing device, casting speed detectors are attached to an appropriate number of drive rolls, and several detected values are selected from among the speed signals detected by the casting speed detectors in descending order of the detected values, and then The average value of the detection values excluding the maximum value or the minimum value among the selected detection values is taken as the casting speed detection value, this casting speed detection value is compared with the casting speed command value, and the difference between the two is calculated as the casting speed command value of each drive roll. A control method for a slab drawing device in continuous casting equipment, characterized in that a torque command is given to a torque controller so that the torque of each drive roll is controlled, while the speed of the slab drawing device as a whole is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25645484A JPS60227958A (en) | 1984-12-06 | 1984-12-06 | Control device for billet drawing equipment in continuous casting installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25645484A JPS60227958A (en) | 1984-12-06 | 1984-12-06 | Control device for billet drawing equipment in continuous casting installation |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2858880A Division JPS56126061A (en) | 1980-03-08 | 1980-03-08 | Control unit for ingot drawing device in continuous casting plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60227958A JPS60227958A (en) | 1985-11-13 |
| JPS6333936B2 true JPS6333936B2 (en) | 1988-07-07 |
Family
ID=17292867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25645484A Granted JPS60227958A (en) | 1984-12-06 | 1984-12-06 | Control device for billet drawing equipment in continuous casting installation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60227958A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100458726B1 (en) * | 2002-08-29 | 2004-12-03 | 재단법인 포항산업과학연구원 | Method for controlling load sharing of strand driven roll |
| DE102004010038A1 (en) | 2004-03-02 | 2005-09-15 | Sms Demag Ag | Driving the safety rolls (7c) of a continuous casting machine useful for casting molten metals, especially molten steels |
| EP3000539B1 (en) | 2014-09-24 | 2016-11-16 | SMS group GmbH | Method for casting and rolling an endless strand |
-
1984
- 1984-12-06 JP JP25645484A patent/JPS60227958A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60227958A (en) | 1985-11-13 |
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