JPH0551371B2 - - Google Patents
Info
- Publication number
- JPH0551371B2 JPH0551371B2 JP3300388A JP3300388A JPH0551371B2 JP H0551371 B2 JPH0551371 B2 JP H0551371B2 JP 3300388 A JP3300388 A JP 3300388A JP 3300388 A JP3300388 A JP 3300388A JP H0551371 B2 JPH0551371 B2 JP H0551371B2
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- catenary
- detectors
- magnetic
- output voltage
- 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 - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 74
- 239000010959 steel Substances 0.000 claims description 74
- 230000035699 permeability Effects 0.000 claims description 22
- 238000005554 pickling Methods 0.000 claims description 17
- 239000002436 steel type Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
(イ) 産業上の利用分野
本発明は、連続酸洗ライン等における鋼帯のカ
テナリ制御方法に関するものである。
(ロ) 従来技術
従来の連続酸洗ライン等のマグネツト式の鋼帯
透磁率検出器を用いた鋼帯のカテナリ制御方法と
しては、第１図に示すように、酸洗槽１内におけ
る鋼帯２のカテナリの位置ｙは酸洗槽１の下部に
設けられたマグネツト式の鋼帯透磁率検出器３に
よつて検出される。酸洗槽１の出入側に設けた各
ブライドル・ロール４，５が鋼帯２を所定のカテ
ナリ位置ｙに確保するように制御している。
従来のカテナリ制御方法においては、マグネツ
ト式鋼帯透磁率検出器３の出力値が鋼帯の鋼種
（成分）により変化（通常200mm）するため、第２
図および第３図に示すような問題があつた。
鋼帯２Ａでは第２図の曲線Ａの特性を有し、第
３図のカテナリ位置設定がy1になるとする。次
に、曲線Ｂの特性を持つ鋼帯２Ｂが酸洗槽１内を
流れると、カテナリ位置設定はy1のままであるの
で、設定値に対応する出力電圧V1になるように
制御するために、カテナリ位置y1からy3へ移行す
る（第２図）。その結果、カテナリ位置は第３図
に示すように下がり、カテナリ位置の設定いかん
によつては、酸洗槽１の底部と鋼帯２Ｂの裏面と
が接触し、鋼帯との裏面にすり疵が入ることがあ
る。
また、上記と逆の場合は、第２図に示す特性Ｃ
を有する鋼帯２Ｃについては、第３図に示すよう
にカテナリ位置がy2と大きくなり、酸洗槽１内で
の鋼帯２Ｃの浸漬長さが短くなり、スケール残り
が発生する。しかし、第２図に示すような各曲線
Ａ，Ｂ，Ｃ……を鋼帯の鋼種（成分）ごとにいく
つかテーブルを持ち、第１図のマグネツト式鋼帯
透磁率検出器３の出力値に上部コンピユータにて
材質補正をしてすべての鋼帯の鋼種（成分）を満
足することは不可能であり、安定なカテナリ制御
ができない。
(ハ) 発明が解決しようとする課題
本発明が解決しようとする課題は、鋼帯の鋼種
の相違にかかわらず安定した鋼帯カテナリを制御
できる安価な方法を得ることにある。
(ニ) 課題を解決するための手段
本発明の鋼帯のカテナリ制御方法は、連続酸洗
ライン等でマグネツト式の鋼帯透磁率検出器を用
いて鋼帯のカテナリを制御する方法において、少
なくとも２組のマグネツト式の鋼帯透磁率検出器
を用いること、第１組のマグネツト式の鋼帯透磁
率検出器を鋼帯のカテナリ制御位置に設けるこ
と、第２組のマグネツト式の鋼帯透磁率検出器を
前記第１組の鋼帯透磁率検出器よりも上流側で、
かつ、鋼帯パスライン常時一定位置に設けるこ
と、前記第２組の検出器の出力電圧を鋼帯の鋼種
により異なる出力電圧にもとづいて出力電圧偏差
が零となるように補正すること、前記第１組の検
出器の出力値と前記第２組の検出器の補正後の出
力値とを比較して偏差を求めること、該偏差が零
になるように鋼帯搬送用駆動モータの駆動速度を
制御することからなる手段によつて、上記課題を
解決している。
(ホ) 実施例
第１図を参照して、本発明の鋼帯のカテナリ制
御方法について説明する。本発明の方法は、
連続酸洗ライン等でマグネツト式の鋼帯透磁率
検出器を用いて鋼帯のカテナリを制御する方法に
おいて、少なくとも２組のマグネツト式の鋼帯透
磁率検出器３，６用いる。第１組のマグネツト式
の鋼帯透磁率検出器３を鋼帯のカテナリ制御位置
（図示例では酸洗槽１の底部）に設ける。また、
第２組のマグネツト式の鋼帯透磁率検出器６を鋼
帯パスライン常時一定位置（図示例では入側ブラ
イドル・ロール５内の鋼帯パスライン）に設け
る。
第２組のマグネツト式の鋼帯透磁率検出器６の
出力電圧を、鋼帯の鋼種により異なる出力電圧に
もとづいて補正する。第２組の検出器６の出力電
圧が鋼帯の鋼種によつて、第１組の検出器３の出
力電圧と相違するので、検出器６の出力電圧を透
磁率補正回路７および材質補正回路８によつて補
正する。
第２組の検出器６の補正後の出力値は、カテナ
リ位置設定回路９をかいして比較回路１０に送ら
れる。第１組の検出器３の出力値も比較回路１０
に送られ、第２組の補正後の出力値とを比較して
偏差を求め、この偏差を零にするように、鋼帯２
の搬送用駆動モータの駆動速度を制御する。
通常の鋼帯の送り速度制御は、第１図に示すよ
うに、出入側ブライドル・ロール４，５とも同一
の制御方式をとつている。すなわち、ブライド
ル・ロール４，５を駆動するモータ４１，５１
は、速度設定回路１２からの設定値とモータに直
結した速度計４４，５４からの実測値を比較し、
その偏差にもとづいて自動速度制御器４３，５３
およびモータ駆動回路４２，５２をかいして、速
度制御されている。
本発明の実施例においては、出側のブライド
ル・ロール４の駆動速度を一定に維持したまま、
入側のブライドル・ロール５の駆動速度を鋼帯の
鋼種の変更に即応して制御する。出入側を逆にし
てもよい。それには、比較回路１０からの出力を
比例積分回路１１をかいして、入側のブライド
ル・ロール５の制御系に送るのである。
(ヘ) 作用
第４図は各鋼種のカテナリの位置ｙと鋼帯検出
器の出力電圧ｖの関係を示す。図において、曲線
Ｄ，Ｅ，Ｆの鋼種は下記の第１表に示すとおりで
ある。
(a) Industrial Application Field The present invention relates to a catenary control method for steel strip in a continuous pickling line or the like. (b) Prior Art As a conventional catenary control method for steel strip using a magnetic steel strip magnetic permeability detector in a continuous pickling line, etc., as shown in FIG. The position y of the catenary No. 2 is detected by a magnetic steel strip permeability detector 3 provided at the bottom of the pickling tank 1. Bridle rolls 4 and 5 provided on the inlet and outlet sides of the pickling tank 1 are controlled to secure the steel strip 2 at a predetermined catenary position y. In the conventional catenary control method, since the output value of the magnetic steel strip permeability detector 3 changes depending on the steel type (component) of the steel strip (usually 200 mm), the second
There were problems as shown in Figures 3 and 3. It is assumed that the steel strip 2A has the characteristics of curve A in FIG. 2, and the catenary position setting in FIG. 3 is y1 . Next, when the steel strip 2B with the characteristics of curve B flows through the pickling tank 1, the catenary position setting remains at y 1 , so the output voltage is controlled to be V 1 corresponding to the set value. , the catenary moves from the catenary position y 1 to y 3 (Figure 2). As a result, the catenary position is lowered as shown in Figure 3, and depending on the setting of the catenary position, the bottom of the pickling tank 1 and the back surface of the steel strip 2B may come into contact, causing scratches on the back surface of the steel strip. may enter. In addition, in the opposite case to the above, the characteristic C shown in Fig. 2
As shown in FIG. 3, for the steel strip 2C, the catenary position increases to y2 , the immersion length of the steel strip 2C in the pickling tank 1 becomes short, and scale remains. However, the output values of the magnetic steel strip magnetic permeability detector 3 shown in FIG. It is impossible to satisfy the steel types (components) of all steel strips by correcting the material properties using the upper computer, and stable catenary control is not possible. (c) Problems to be Solved by the Invention The problem to be solved by the present invention is to obtain an inexpensive method capable of stably controlling steel strip catenary regardless of the steel type of the steel strip. (d) Means for Solving the Problems The steel strip catenary control method of the present invention is a method for controlling the steel strip catenary using a magnetic steel strip permeability detector in a continuous pickling line or the like. Two sets of magnetic steel strip permeability detectors are used, a first set of magnetic steel strip permeability detectors is provided at a catenary control position of the steel strip, and a second set of magnetic steel strip permeability detectors is installed at a catenary control position of the steel strip. a magnetic permeability detector upstream of the first set of steel strip magnetic permeability detectors,
and providing the steel strip pass line at a constant position at all times, correcting the output voltage of the second set of detectors so that the output voltage deviation becomes zero based on the output voltage that differs depending on the steel type of the steel strip, and Comparing the output value of one set of detectors and the corrected output value of the second set of detectors to obtain a deviation, and adjusting the driving speed of the steel strip conveying drive motor so that the deviation becomes zero. The above problem is solved by means of control. (E) Embodiment The catenary control method for steel strip according to the present invention will be described with reference to FIG. The method of the present invention includes at least two sets of magnetic steel strip permeability detectors 3 and 6 in a method for controlling the catenary of a steel strip using a magnetic steel strip magnetic permeability detector in a continuous pickling line or the like. use A first set of magnetic steel strip permeability detectors 3 is provided at a catenary control position of the steel strip (in the illustrated example, at the bottom of the pickling tank 1). Also,
A second set of magnetic steel strip permeability detectors 6 is provided at a constant position on the steel strip pass line (in the illustrated example, on the steel strip pass line in the entrance bridle roll 5). The output voltage of the second set of magnetic steel strip permeability detectors 6 is corrected based on the output voltage, which varies depending on the steel type of the steel strip. Since the output voltage of the second set of detectors 6 differs from the output voltage of the first set of detectors 3 depending on the steel type of the steel strip, the output voltage of the detector 6 is adjusted between the permeability correction circuit 7 and the material correction circuit. Corrected by 8. The corrected output values of the second set of detectors 6 are sent to a comparison circuit 10 via a catenary position setting circuit 9. The output value of the first set of detectors 3 is also
The output value of the second set is compared with the corrected output value to determine the deviation.
Controls the drive speed of the transport drive motor. As shown in FIG. 1, normal steel strip feed rate control uses the same control system for both the inlet and outlet bridle rolls 4 and 5. That is, the motors 41 and 51 that drive the bridle rolls 4 and 5
compares the setting value from the speed setting circuit 12 and the actual value from the speedometers 44, 54 directly connected to the motor,
Based on the deviation, automatic speed controllers 43, 53
The speed is controlled using motor drive circuits 42 and 52. In the embodiment of the present invention, while maintaining the driving speed of the exit side bridle roll 4 constant,
The driving speed of the bridle roll 5 on the entry side is controlled in immediate response to a change in the steel type of the steel strip. The entrance and exit sides may be reversed. To do this, the output from the comparator circuit 10 is sent to the control system of the bridle roll 5 on the entry side via a proportional-integral circuit 11. (f) Effect Figure 4 shows the relationship between the catenary position y of each steel type and the output voltage v of the steel strip detector. In the figure, the steel types of curves D, E, and F are as shown in Table 1 below.
【表】
第４図に示すように、鋼帯の化学成分により同
じカテナリの位置ｙでも出力電圧がそれぞれ異な
る。例えば、酸洗槽内に１個の鋼帯透磁率検出器
のみの場合、カテナリの基準位置y1を酸洗槽底部
から100mmの位置に制御しようとすると、鋼種Ｄ
では、1.7V、鋼種Ｅでは、0.3V、鋼種Ｆでは−
0.5Vに鋼帯検出器の出力電圧が得られるように
酸洗槽出入側ブライドルの速度制御を実施しなけ
ればならない。
これは多種類の鋼種を酸洗するラインでは現実
的に実施不可能である。しかし、１種類の出力電
圧−距離特性曲線でカテナリ制御を実施すると
（例えば、Ｅ特性曲線を採用したとする）、カテナ
リ基準位置y1＝100mmでは0.3Vであるために、鋼
種Ｅでは、カテナリ基準位置y1＝163mm、鋼種Ｆ
では、カテナリ基準位置y1＝65mmとなり、カテナ
リ基準位置y1が変動することになる。
そこで、本発明の方法においては、第２図に示
すように、鋼帯Ａを基準に鋼帯Ａの送り速度を設
定した場合に、鋼帯Ａが鋼帯ＢまたはＣに変更し
たときには、第１組の検出器３の出力電圧はカテ
ナリ位置yXに対してVBまたはVCに変化する。そ
こで、まず鋼帯変更による補正△VBまたは△VC
を行つた後に、カテナリ基準位置y1との偏差△
V1をなくすように鋼帯の速度制御を行う。
(ト) 効果
本発明の方法によれば、鋼帯の鋼種の違いによ
る出力電圧の違い、すなわちカテナリ位置の下が
りによる酸洗槽下部と鋼帯の裏面との接触による
すり疵、または逆にカテナリ位置が必要以上に浮
き上がることによるスケール残り等の品質問題を
解消することができる。また、トラブル発生時に
カテナリ距離・出力電圧曲線の手動介入による変
更、カテナリ位置設定値の変更等の煩しい動作を
省略することもできる。それに合せて、カテナリ
位置表示（運転室表示）も精度を増し、オペレー
タの操業の目安ともなる。[Table] As shown in Fig. 4, the output voltage differs even at the same catenary position y depending on the chemical composition of the steel strip. For example, when there is only one steel strip permeability detector in the pickling tank, if you try to control the catenary reference position y 1 to a position 100 mm from the bottom of the pickling tank, the steel type D
So, 1.7V, 0.3V for steel type E, − for steel type F.
The speed of the pickling tank entrance/exit bridle must be controlled so that the output voltage of the steel strip detector is 0.5V. This is practically impossible on a line that pickles many types of steel. However, if catenary control is performed using one type of output voltage-distance characteristic curve (for example, if the E characteristic curve is adopted), the catenary reference position y 1 = 100 mm is 0.3V, so for steel type E, the catenary Reference position y 1 = 163mm, steel type F
Then, the catenary reference position y 1 =65 mm, and the catenary reference position y 1 will fluctuate. Therefore, in the method of the present invention, as shown in FIG. 2, when the feed rate of steel strip A is set based on steel strip A, when steel strip A is changed to steel strip B or C, The output voltage of one set of detectors 3 changes to V B or V C with respect to the catenary position y X. Therefore, first, the correction by changing the steel strip △V B or △V C
After performing , the deviation from the catenary reference position y 1 is △
Control the speed of the steel strip to eliminate V 1 . (g) Effects According to the method of the present invention, differences in output voltage due to different steel types of steel strips, i.e., scratches due to contact between the lower part of the pickling tank and the back surface of the steel strip due to lowering of the catenary position, or conversely, catenary It is possible to eliminate quality problems such as scale remaining due to positions being raised more than necessary. Further, when trouble occurs, it is possible to omit cumbersome operations such as changing the catenary distance/output voltage curve by manual intervention and changing the catenary position setting value. In line with this, the accuracy of the catenary position display (display in the operator's cab) has also increased, and it also serves as a guide for operators' operations.
第１図は従来の鋼帯の酸洗ラインに本発明の方
法を適用した概略説明図。第２図は鋼帯の変更に
よるカテナリ位置と鋼帯検出器の出力電圧との関
係を示すグラフ。第３図は酸洗槽内における各種
鋼帯のカテナリ位置の説明図。第４図は鋼帯の鋼
種と検出器出力電圧とカテナリの位置との相互関
係を示すグラフ。
３：第１組のマグネツト式の鋼帯検出器、６：
第２組のマグネツト式の鋼帯検出器。
FIG. 1 is a schematic explanatory diagram in which the method of the present invention is applied to a conventional steel strip pickling line. FIG. 2 is a graph showing the relationship between the catenary position and the output voltage of the steel strip detector when the steel strip is changed. FIG. 3 is an explanatory diagram of the catenary positions of various steel strips in the pickling tank. FIG. 4 is a graph showing the correlation between the steel type of the steel strip, the detector output voltage, and the catenary position. 3: First set of magnetic steel strip detectors, 6:
Second set of magnetic steel strip detectors.
Claims (1)
率検出器を用いて鋼帯のカテナリを制御する方法
において、少なくとも２組のマグネツト式の鋼帯
透磁率検出器を用いること、第１組のマグネツト
式の鋼帯透磁率検出器を鋼帯のカテナリ制御位置
に設けること、第２組のマグネツト式の鋼帯透磁
率検出器を前記第１組の鋼帯透磁率検出器よりも
上流側で、かつ、鋼帯パスライン常時一定位置に
設けること、前記第２組の検出器の出力電圧を鋼
帯の鋼種により異なる出力電圧にもとづいて出力
電圧偏差が零となるように補正すること、前記第
１組の検出器の出力値と前記第２組の検出器の補
正後の出力値とを比較して偏差を求めること、該
偏差が零になるように鋼帯搬送用駆動モータの駆
動速度を制御することからなる鋼帯のカテナリ制
御方法。1. In a method for controlling the catenary of a steel strip using magnetic steel strip permeability detectors in a continuous pickling line, etc., at least two sets of magnetic steel strip permeability detectors are used, and the first set A magnetic steel strip magnetic permeability detector is provided at a catenary control position of the steel strip, and a second set of magnetic steel strip magnetic permeability detectors is provided upstream of the first set of steel strip magnetic permeability detectors. and the steel strip pass line is always provided at a constant position, and the output voltage of the second set of detectors is corrected so that the output voltage deviation becomes zero based on the output voltage that differs depending on the steel type of the steel strip. Comparing the output value of the first set of detectors and the corrected output value of the second set of detectors to obtain a deviation, and adjusting the driving speed of the steel strip conveying drive motor so that the deviation becomes zero. A steel strip catenary control method comprising controlling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3300388A JPH01210114A (en) | 1988-02-16 | 1988-02-16 | Catenary control method for steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3300388A JPH01210114A (en) | 1988-02-16 | 1988-02-16 | Catenary control method for steel strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01210114A JPH01210114A (en) | 1989-08-23 |
| JPH0551371B2 true JPH0551371B2 (en) | 1993-08-02 |
Family
ID=12374664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3300388A Granted JPH01210114A (en) | 1988-02-16 | 1988-02-16 | Catenary control method for steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01210114A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109335789B (en) * | 2018-09-17 | 2020-04-24 | 芜湖海成科技有限公司 | Conveying device for electrolytic metal strip |
-
1988
- 1988-02-16 JP JP3300388A patent/JPH01210114A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01210114A (en) | 1989-08-23 |
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