JPH07185631A - Winding temperature control method for hot rolled steel sheet - Google Patents
Winding temperature control method for hot rolled steel sheetInfo
- Publication number
- JPH07185631A JPH07185631A JP5335215A JP33521593A JPH07185631A JP H07185631 A JPH07185631 A JP H07185631A JP 5335215 A JP5335215 A JP 5335215A JP 33521593 A JP33521593 A JP 33521593A JP H07185631 A JPH07185631 A JP H07185631A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- rolled steel
- hot
- temperature
- hot rolled
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱間仕上圧延後の熱延
鋼板の巻取温度制御方法に関し、特に熱延鋼板の先端部
の巻取温度の精度向上を図り、全長にわたり均一な機械
的性質を得るための巻取温度制御方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a coiling temperature of a hot-rolled steel sheet after hot finish rolling, and more particularly to improve the accuracy of the coiling temperature at the tip of the hot-rolled steel sheet to obtain a uniform machine over the entire length. The present invention relates to a winding temperature control method for obtaining specific properties.
【０００２】[0002]
【従来の技術】熱間仕上圧延機により仕上圧延された高
温の熱延鋼板は巻取機により巻取られて製品コイルとな
るが、その巻取りの際、要求される製品の機械的性質を
確保するため巻取温度が定められている。この巻取温度
を制御するために、冷却装置が熱間仕上圧延機と巻取機
の間に設けられている。2. Description of the Related Art A high temperature hot-rolled steel sheet finish-rolled by a hot finish rolling mill is wound by a winder to form a product coil. At the time of winding, the required mechanical properties of the product are The coiling temperature is set to ensure it. In order to control the winding temperature, a cooling device is provided between the hot finish rolling mill and the winding machine.
【０００３】図２は、熱延鋼板を所定の巻取温度に制御
する巻取温度制御設備の概念図である。図において、１
は熱間仕上圧延機、２は巻取機、３はランアウトテーブ
ル、４はランアウトテーブル３を構成するローラ、５お
よび６は仕上圧延機１と巻取機２の間のランアウトテー
ブル３の上部および下部に設置された冷却装置、７は仕
上圧延機１の速度検出器、８および９は仕上圧延機１の
後面に設置された板厚計および仕上圧延機出側温度計、
10は巻取温度計、11は巻取温度制御用計算機、Ｓは熱延
鋼板、をそれぞれ示す。FIG. 2 is a conceptual diagram of a winding temperature control facility for controlling the hot rolled steel sheet at a predetermined winding temperature. In the figure, 1
Is a hot finish rolling mill, 2 is a winder, 3 is a runout table, 4 is a roller that constitutes the runout table 3, 5 and 6 are the upper part of the runout table 3 between the finish rolling mill 1 and the winder 2, and A cooling device installed at the lower portion, 7 is a speed detector of the finishing rolling mill 1, 8 and 9 are plate thickness gauges and finishing thermometers on the rear surface of the finishing rolling mill 1,
Reference numeral 10 is a winding thermometer, 11 is a winding temperature control computer, and S is a hot-rolled steel sheet.
【０００４】上記巻取温度制御設備においては、熱間仕
上圧延された熱延鋼板Ｓは、ランアウトテーブル３上を
走行中に仕上圧延機１と巻取機２の間に設けられた冷却
装置５，６によって上部および下部から注水されて冷却
され、その注水量は、巻取温度制御用計算機11に入力さ
れた速度検出器７からの圧延速度、板厚計８からの熱間
仕上圧延後の熱延鋼板Ｓの板厚、仕上圧延機出側温度計
９からの熱間仕上圧延後の熱延鋼板Ｓの温度などをもと
に、巻取られる熱延鋼板Ｓの温度が目標の巻取温度とな
るように演算して決定される。In the winding temperature control equipment, the hot-rolled hot-rolled steel sheet S is cooled by a cooling device 5 provided between the finish rolling mill 1 and the winding machine 2 while traveling on the runout table 3. , 6 to inject water from the upper and lower parts to cool it, and the amount of water injected is the rolling speed from the speed detector 7 input to the coiling temperature control computer 11 and the hot-rolling after hot rolling from the plate thickness gauge 8. Based on the plate thickness of the hot rolled steel sheet S, the temperature of the hot rolled steel sheet S after hot finish rolling from the finish rolling mill thermometer 9, the temperature of the hot rolled steel sheet S to be wound is the target winding. It is calculated and determined so as to be the temperature.
【０００５】[0005]
【発明が解決しようとする課題】ところで、上述の如き
巻取温度制御においては、熱延鋼板Ｓの先端部の巻取温
度は目標の巻取温度からの偏差およびバラツキが大き
く、中間部と比較して目標とする巻取温度から外れ易い
と言う問題のあることが従来より言われており、この問
題の改善策として、例えば特公平 4−8125号公報や特開
平 3−198905号公報に、熱延鋼板の先端部の温度を目標
温度とするため、先行熱延鋼板の先端部における巻取温
度の実績値と目標値との差をもとに後続熱延鋼板の先端
部の目標温度を修正する方法が提案されている。この方
法ではそれなりに熱延鋼板の先端部の巻取温度を目標巻
取温度に制御し得るものと思われるが、詳細を後記する
先行熱延鋼板と後続熱延鋼板との間の時間間隔が考慮さ
れていない。In the coiling temperature control as described above, the coiling temperature at the tip of the hot-rolled steel sheet S has a large deviation and variation from the target coiling temperature. It has been conventionally said that there is a problem that it is easy to deviate from the target winding temperature, and as a countermeasure for this problem, for example, Japanese Patent Publication No. 4-8125 and Japanese Patent Laid-Open No. 3-198905, Since the temperature of the tip of the hot-rolled steel sheet is set as the target temperature, the target temperature of the tip of the subsequent hot-rolled steel sheet is calculated based on the difference between the actual value and the target value of the winding temperature at the tip of the preceding hot-rolled steel sheet. A method to fix it is proposed. With this method, it seems that the winding temperature of the tip of the hot-rolled steel sheet can be controlled to the target winding temperature as it is, but the time interval between the preceding hot-rolled steel sheet and the subsequent hot-rolled steel sheet, which will be described later in detail, is Not considered.
【０００６】一方、本発明者らも、上記問題を改善する
ために種々の調査および研究を重ねてきた。そして、熱
延鋼板Ｓの先端部の温度について調査した結果、後続熱
延鋼板の先端部の温度は、図３に示すように先行熱延鋼
板が通過した後、後続熱延鋼板が到達するまでの時間間
隔に影響されることを突き止めるとともに、その大きな
要因がランアウトテーブル３のローラ４にあることを突
き止めた。On the other hand, the present inventors have made various investigations and studies in order to improve the above problems. Then, as a result of investigating the temperature of the tip portion of the hot-rolled steel sheet S, the temperature of the tip portion of the subsequent hot-rolled steel sheet was determined as shown in FIG. It was found that the roller 4 of the run-out table 3 had a major factor as well as the influence of the time interval of.
【０００７】すなわち、ランアウトテーブル３のローラ
４の表面温度は、先行熱延鋼板の冷却中、注水されてい
る位置のローラでは低く、注水されていない位置のロー
ラでは高い。また、ローラ４の表面温度は先行熱延鋼板
の温度にも影響され、鋼板温度が高いとローラの表面温
度も高くなる。さらに、先行熱延鋼板の尾端通過後、ロ
ーラ表面温度は空冷により降下し、後続熱延鋼板の先端
が来た時から上昇し、中間部以降ではほぼ飽和した状態
となり安定する。一方、先行熱延鋼板と後続熱延鋼板と
の間の時間間隔は、連続して仕上圧延される熱延鋼板毎
に異なる。このように先行熱延鋼板と後続熱延鋼板との
間の時間間隔が異なれば、先行熱延鋼板の尾端が通過し
た後のランアウトテーブル３のローラ４の空冷時間も異
なり、その表面温度も異なる。さらに、先行熱延鋼板の
注水位置、温度によってもローラ表面温度が異なること
になる。ローラ４の表面温度が異なると熱延鋼板との間
に温度差が異なるため、これにより熱延鋼板Ｓの先端部
はローラ４による冷却で温度降下量にバラツキを生じる
ことになる。このため、熱延鋼板Ｓの中央部では巻取温
度の実績値はほぼ目標値に制御されているが、先端部で
は巻取温度の実績値のバラツキが大きくなる。That is, the surface temperature of the roller 4 of the run-out table 3 is low in the roller at the position where water is poured and is high at the roller where water is not supplied during the cooling of the preceding hot-rolled steel sheet. The surface temperature of the roller 4 is also affected by the temperature of the preceding hot-rolled steel sheet, and when the steel sheet temperature is high, the surface temperature of the roller also rises. Further, after passing through the tail end of the preceding hot-rolled steel sheet, the roller surface temperature drops due to air cooling, rises from the time when the leading edge of the subsequent hot-rolled steel sheet comes, and becomes substantially saturated and stable after the middle portion. On the other hand, the time interval between the preceding hot-rolled steel sheet and the subsequent hot-rolled steel sheet differs for each hot-rolled steel sheet that is continuously finish-rolled. Thus, if the time interval between the preceding hot-rolled steel sheet and the subsequent hot-rolled steel sheet is different, the air-cooling time of the roller 4 of the runout table 3 after the tail end of the preceding hot-rolled steel sheet has passed is different, and the surface temperature is also different. Further, the roller surface temperature also varies depending on the water injection position and temperature of the preceding hot-rolled steel sheet. When the surface temperature of the roller 4 is different, the temperature difference between the roller 4 and the hot-rolled steel sheet is different, so that the tip of the hot-rolled steel sheet S is cooled by the roller 4 and the temperature drop amount varies. Therefore, the actual value of the winding temperature is controlled to be substantially the target value in the central portion of the hot-rolled steel sheet S, but the actual value of the winding temperature varies greatly at the tip portion.
【０００８】本発明は、上記の事情に着目してなされた
ものであって、その目的は、熱延鋼板の先端部における
巻取温度の精度向上を図り、これにより、熱延鋼板全長
にわたり均一な機械的性質を得るための巻取温度制御方
法を提供することである。The present invention has been made in view of the above circumstances, and its purpose is to improve the accuracy of the winding temperature at the tip of the hot-rolled steel sheet, thereby making it uniform over the entire length of the hot-rolled steel sheet. It is to provide a winding temperature control method for obtaining various mechanical properties.
【０００９】[0009]
【課題を解決するための手段】上記の目的を達成するた
め、本発明に係わる熱延鋼板の巻取温度制御方法は、熱
間仕上圧延機と巻取機の間に配設された複数個の注水バ
ンクにより熱延鋼板の巻取温度を目標温度に制御する方
法において、先行熱延鋼板に続く後続熱延鋼板の先端部
の温度を、先行熱延鋼板と後続熱延鋼板との間の時間間
隔および先行熱延鋼板の注水位置や温度に基づく先端部
の温度降下量を加味する注水量をもって制御するもので
ある。In order to achieve the above object, a method for controlling a coiling temperature of a hot-rolled steel sheet according to the present invention comprises a plurality of hot-rolling mills arranged between a hot-finish rolling mill and a coiler. In the method of controlling the coiling temperature of the hot-rolled steel sheet to the target temperature by the water injection bank, the temperature of the tip portion of the subsequent hot-rolled steel sheet following the preceding hot-rolled steel sheet is set between the preceding hot-rolled steel sheet and the subsequent hot-rolled steel sheet. It is controlled by the amount of water injection taking into consideration the time interval and the amount of temperature drop at the tip portion based on the water injection position and temperature of the preceding hot-rolled steel sheet.
【００１０】[0010]
【作用】以下、本発明の構成並びに作用について詳述す
る。上述したように、ランアウトテーブルのローラは、
先行熱延鋼板の尾端が通過後、空冷により冷却される。
従って、後続熱延鋼板の先端が来た時のローラの表面温
度は、先行熱延鋼板の注水位置や温度および先行熱延鋼
板の尾端通過後からの時間により決定される。一方、ロ
ーラ冷却による熱延鋼板の温度降下量は、熱延鋼板の表
面温度とローラの表面温度との差の関数であり、ローラ
の表面温度が低いほど熱延鋼板の温度降下量は大きくな
る。従って、先行熱延鋼板と後続熱延鋼板との間の時間
間隔が長くなるほど、後続熱延鋼板の先端部の温度降下
量が大きくなる。The structure and operation of the present invention will be described in detail below. As mentioned above, the runout table rollers
After the tail end of the preceding hot-rolled steel sheet has passed, it is cooled by air cooling.
Therefore, the surface temperature of the roller when the tip of the succeeding hot-rolled steel sheet comes is determined by the water injection position and temperature of the preceding hot-rolled steel sheet and the time after the tail end of the preceding hot-rolled steel sheet has passed. On the other hand, the temperature drop of the hot-rolled steel sheet due to roller cooling is a function of the difference between the surface temperature of the hot-rolled steel sheet and the surface temperature of the roller, and the lower the surface temperature of the roller, the greater the temperature drop of the hot-rolled steel sheet. . Therefore, the longer the time interval between the preceding hot-rolled steel sheet and the subsequent hot-rolled steel sheet, the larger the temperature drop amount at the tip of the subsequent hot-rolled steel sheet.
【００１１】そこで、本発明では、熱間仕上圧延機と巻
取機の間に配設された複数個の注水バンクにより熱延鋼
板の巻取温度を目標温度に制御するに当たり、先行熱延
鋼板の注水位置や温度および先行熱延鋼板と後続熱延鋼
板との間の時間間隔に基づく先端部の温度降下量を加味
して注水量を制御するように構成した。Therefore, in the present invention, when the winding temperature of the hot rolled steel sheet is controlled to the target temperature by the plurality of water injection banks arranged between the hot finish rolling mill and the winder, the preceding hot rolled steel sheet is used. The water injection amount was controlled by taking into account the water injection position and temperature and the temperature drop amount at the tip based on the time interval between the preceding hot-rolled steel sheet and the subsequent hot-rolled steel sheet.
【００１２】先行熱延鋼板と後続熱延鋼板との間の時間
間隔に基づく先端部の温度降下量を加味する仕方として
は、ローラの表面温度が先行熱延鋼板と後続熱延鋼板と
の間の時間間隔から予測できるので、これを温度計算に
考慮するようにしてもよいし、あるいは、先行熱延鋼板
と後続熱延鋼板との間の時間間隔を基に熱延鋼板の先端
部の制御上の目標温度を補正するようにしてもよい。い
ずれの方法によっても熱延鋼板の先端部の巻取温度のバ
ラツキを小さくすることができ、熱延鋼板全長にわたり
均一な機械的性質を得ることができる。As a method of adding the temperature drop amount at the tip portion based on the time interval between the preceding hot-rolled steel sheet and the subsequent hot-rolled steel sheet, the surface temperature of the roller is set between the preceding hot-rolled steel sheet and the subsequent hot-rolled steel sheet. Since it can be predicted from the time interval of the hot-rolled steel sheet, it may be taken into consideration in the temperature calculation, or the tip of the hot-rolled steel sheet is controlled based on the time interval between the preceding hot-rolled steel sheet and the subsequent hot-rolled steel sheet. The target temperature above may be corrected. Either method can reduce variations in the winding temperature at the tip of the hot-rolled steel sheet, and can obtain uniform mechanical properties over the entire length of the hot-rolled steel sheet.
【００１３】[0013]
【実施例】以下、本発明の実施例を説明する。本発明に
係わる熱延鋼板の巻取温度制御方法は、基本的には前記
図２に示す巻取温度制御設備に適用される。EXAMPLES Examples of the present invention will be described below. The winding temperature control method for hot-rolled steel sheet according to the present invention is basically applied to the winding temperature control equipment shown in FIG.
【００１４】本発明の巻取温度制御方法では、巻取温度
制御用計算機11に入力され記憶されている熱間仕上圧延
による圧延速度、熱間仕上圧延後の熱延鋼板Ｓの板厚、
温度などをもとに、熱延鋼板Ｓの巻取温度を目標値に制
御するに当たり、指令された目標温度に加えて、さらに
熱延鋼板Ｓの先端部の制御上の目標温度を、図３に示
す、先行熱延鋼板と後続熱延鋼板との間の時間間隔と先
端部の温度降下量との関係より修正する制御を加え、こ
れにより、注水量を求めて熱延鋼板Ｓの全体の制御が行
われる。In the winding temperature control method of the present invention, the rolling speed by hot finish rolling, which is input and stored in the winding temperature control computer 11, the plate thickness of the hot rolled steel sheet S after hot finish rolling,
In controlling the coiling temperature of the hot-rolled steel sheet S to a target value based on the temperature and the like, in addition to the commanded target temperature, a target temperature for control of the tip of the hot-rolled steel sheet S is shown in FIG. The control which corrects from the relationship between the time interval between the preceding hot-rolled steel sheet and the subsequent hot-rolled steel sheet and the temperature drop amount at the tip end is added, whereby the water injection amount is calculated to determine the total amount of hot-rolled steel sheet S. Control is performed.
【００１５】因みに、板厚が 3mm、板幅1235mmで、目標
巻取温度が 500℃、強度30キロの鋼板において、従来の
方法で冷却した時の巻取温度の実績と、本発明の方法で
冷却した時の巻取温度の実績を図１に示す。破線は従来
方法によるもの、実線は本発明方法によるものである。By the way, in a steel plate having a plate thickness of 3 mm, a plate width of 1235 mm, a target coiling temperature of 500 ° C. and a strength of 30 kg, the coiling temperature when cooled by the conventional method and the method of the present invention are used. Fig. 1 shows the results of the winding temperature when cooled. The broken line is based on the conventional method, and the solid line is based on the method of the present invention.
【００１６】従来の方法では、鋼板先端部で巻取温度の
目標値に対して、実績値が低めに大きく外れているが、
本発明の方法では鋼板全長にわたって良好な巻取温度精
度が得られている。In the conventional method, the actual value deviates from the target value of the coiling temperature at the tip of the steel plate to a large extent, but
According to the method of the present invention, good winding temperature accuracy is obtained over the entire length of the steel sheet.
【００１７】[0017]
【発明の効果】本発明によれば、鋼板全長にわたり、巻
取温度精度の向上、および機械的性質の均一化が達成で
き、その経済的効果は大きい。According to the present invention, the accuracy of the coiling temperature can be improved and the mechanical properties can be made uniform over the entire length of the steel sheet, and its economic effect is great.
【図１】従来方法で冷却した時の巻取温度実績と本発明
方法で冷却した時の巻取温度実績を示す図である。FIG. 1 is a diagram showing a winding temperature result when cooled by a conventional method and a winding temperature result when cooled by a method of the present invention.
【図２】熱間仕上圧延機と巻取機との間の冷却設備の概
要図である。FIG. 2 is a schematic diagram of cooling equipment between a hot finish rolling mill and a winding machine.
【図３】先行熱延鋼板と後続熱延鋼板との間の時間間隔
と先端部の目標温度に対する偏差との関係を示すグラフ
図である。FIG. 3 is a graph showing a relationship between a time interval between a preceding hot-rolled steel sheet and a subsequent hot-rolled steel sheet and a deviation with respect to a target temperature of a tip portion.
１：熱間仕上圧延機 ２：巻取機 ３：ランアウトテーブル ４：ローラ ５：上部冷却装置 ６：下部冷却装置 ７：速度検出器 ８：板厚計 ９：仕上圧延機出側温度計 10：巻取温度計 11：巻取温度制御用計算機 Ｓ：熱延鋼板 1: Hot finishing rolling mill 2: Winding machine 3: Run-out table 4: Roller 5: Upper cooling device 6: Lower cooling device 7: Speed detector 8: Plate thickness gauge 9: Finishing mill exit side thermometer 10: Winding thermometer 11: Computer for winding temperature control S: Hot rolled steel sheet
───────────────────────────────────────────────────── フロントページの続き (72)発明者 水田 篤男 兵庫県加古川市金沢町１番地 株式会社神 戸製鋼所加古川製鉄所内 (72)発明者 浦川 秀喜 兵庫県加古川市金沢町１番地 株式会社神 戸製鋼所加古川製鉄所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Mizuta 1 Kanazawa-machi, Kakogawa, Hyogo Prefecture Kamido Steel Works, Ltd. Kakogawa Steel Works (72) Hideki Urakawa Kanazawa-cho, Kakogawa, Hyogo Prefecture Kamido Co., Ltd. Inside the Kakogawa Works
Claims (1)
た複数個の注水バンクにより熱延鋼板の巻取温度を目標
温度に制御する方法において、先行熱延鋼板に続く後続
熱延鋼板の先端部の温度を、先行熱延鋼板と後続熱延鋼
板との間の時間間隔および先行熱延鋼板の注水位置や温
度に基づく先端部の温度降下量を加味する注水量をもっ
て制御することを特徴とする熱延鋼板の巻取温度制御方
法。1. A method for controlling a coiling temperature of a hot-rolled steel sheet to a target temperature by a plurality of water injection banks arranged between a hot finish rolling mill and a winding machine, wherein Controls the temperature of the tip of the hot-rolled steel sheet with the time interval between the preceding hot-rolled steel sheet and the subsequent hot-rolled steel sheet and the amount of water injection that takes into account the water pouring position of the preceding hot-rolled steel sheet and the temperature drop amount at the tip based on the temperature. A method for controlling a winding temperature of a hot rolled steel sheet, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5335215A JPH07185631A (en) | 1993-12-28 | 1993-12-28 | Winding temperature control method for hot rolled steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5335215A JPH07185631A (en) | 1993-12-28 | 1993-12-28 | Winding temperature control method for hot rolled steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07185631A true JPH07185631A (en) | 1995-07-25 |
Family
ID=18286056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5335215A Withdrawn JPH07185631A (en) | 1993-12-28 | 1993-12-28 | Winding temperature control method for hot rolled steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07185631A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008020549A1 (en) * | 2006-08-18 | 2008-02-21 | Nippon Steel Corporation | Method of cooling steel sheet |
| KR20200035078A (en) * | 2017-07-28 | 2020-04-01 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | Winding temperature control system |
-
1993
- 1993-12-28 JP JP5335215A patent/JPH07185631A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008020549A1 (en) * | 2006-08-18 | 2008-02-21 | Nippon Steel Corporation | Method of cooling steel sheet |
| KR100882931B1 (en) * | 2006-08-18 | 2009-02-10 | 신닛뽄세이테쯔 카부시키카이샤 | Method of cooling steel sheet |
| US8282747B2 (en) | 2006-08-18 | 2012-10-09 | Nippon Steel Corporation | Cooling method of steel plate |
| KR20200035078A (en) * | 2017-07-28 | 2020-04-01 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | Winding temperature control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010306 |