JPH04319009A - Method for rolling steel tube by on-line measuring displacement of surface of rolling roll in high-speed hot rolling process for steel tube - Google Patents
Method for rolling steel tube by on-line measuring displacement of surface of rolling roll in high-speed hot rolling process for steel tubeInfo
- Publication number
- JPH04319009A JPH04319009A JP3109550A JP10955091A JPH04319009A JP H04319009 A JPH04319009 A JP H04319009A JP 3109550 A JP3109550 A JP 3109550A JP 10955091 A JP10955091 A JP 10955091A JP H04319009 A JPH04319009 A JP H04319009A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- roll
- steel tube
- displacement
- outer diameter
- 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- Withdrawn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
- 238000005096 rolling process Methods 0.000 title claims abstract description 22
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 title claims description 22
- 239000010959 steel Substances 0.000 title claims description 22
- 238000000034 method Methods 0.000 title claims description 12
- 238000005098 hot rolling Methods 0.000 title claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
Landscapes
- Control Of Metal Rolling (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、鋼管を高速で熱間圧延
する工程において、圧延ロール表面の摩耗等による微小
な変位をオンラインで検出することにより、常に安定し
た外径、表面肌に仕上げるための鋼管圧延方法に関する
。[Industrial Application Field] The present invention detects minute displacements due to abrasion on the rolling roll surface online during the process of hot rolling steel pipes at high speed, thereby constantly achieving a stable outer diameter and surface texture. This invention relates to a method for rolling steel pipes.
【０００２】0002
【従来の技術】一般に、鋼管の熱間高速圧延ミルでは、
仕上げ外径の制御を行う場合、圧延した鋼管を冷却後、
サンプリングして外径を測定し、仕上げスタンドのロー
ルギャップをフィードバック制御する方法が採られてい
る。（特開昭５４−１２６６５３号公報、特開昭６０−
６４７１２号公報、特開平０１−１５２０５号公報等）
また、オンラインの熱間での外径測定については、光セ
ンサー等の非接触の測定器を用いる方法や、仕上げスタ
ンドの圧延反力を測定することにより、およその外径変
化の傾向を管理することは可能である。[Prior Art] Generally, in hot high-speed rolling mills for steel pipes,
When controlling the finished outer diameter, after cooling the rolled steel pipe,
A method is adopted in which the outer diameter is measured by sampling and the roll gap of the finishing stand is feedback-controlled. (Japanese Patent Application Laid-Open No. 126653/1983, Japanese Patent Application Laid-open No. 1983-
64712, JP-A-01-15205, etc.)
In addition, regarding online hot outer diameter measurement, the tendency of approximate outer diameter change can be managed by using a non-contact measuring device such as an optical sensor or by measuring the rolling reaction force of the finishing stand. It is possible.
【０００３】0003
【発明が解決しようとする課題】圧延した鋼管を冷却後
、サンプリングして外径を測定し、仕上げスタンドのロ
ールギャップをフィードバック制御する方法の場合、仕
上がり外径を即座に把握することができないため、外径
の異常な変動が起こった場合、大量の寸法不良が発生す
る恐れがある。また、冷却した後のサンプリング測定で
は、熱収縮や、表面スケールの付着状態により、バラツ
キが大きく、真の仕上がり外径を把握することは困難で
ある。また、非接触の光センサー等を用いた仕上げ直後
の外径をオンラインで測定する方法は、熱間高速圧延の
ためセンサーの耐久性、測定精度に問題があり、外径を
制御するには至らない。また、ロール摩耗によりロール
孔型が大きくなることによる外径の変動は、スタンドの
圧延反力を測定することにより、およその傾向を管理す
ることは可能であるが、正確な外径変動を把握すること
はできない。さらにロールの摩耗量を把握できないため
、ロール表面の肌荒れに気付くのが遅れ、仕上がり製品
の肌荒れ不良が大量発生する場合もある。[Problem to be Solved by the Invention] In the case of a method in which the rolled steel pipe is sampled after cooling, the outer diameter is measured, and the roll gap of the finishing stand is feedback-controlled, the finished outer diameter cannot be immediately determined. , if an abnormal variation in the outer diameter occurs, a large amount of dimensional defects may occur. Furthermore, sampling measurements after cooling have large variations due to thermal contraction and the state of adhesion of surface scale, making it difficult to determine the true finished outer diameter. In addition, the online method of measuring the outside diameter immediately after finishing using a non-contact optical sensor, etc. has problems with the durability of the sensor and measurement accuracy due to hot high-speed rolling, and it is not possible to control the outside diameter. do not have. In addition, it is possible to roughly control the tendency of changes in the outer diameter caused by the enlargement of the roll hole shape due to roll wear by measuring the rolling reaction force of the stand, but it is difficult to grasp exact changes in the outer diameter. I can't. Furthermore, since the amount of wear on the rolls cannot be ascertained, there is a delay in noticing roughness on the roll surface, which may result in a large number of defects in the roughness of the finished product.
【０００４】0004
【課題を解決するための手段】本発明は、図１に示すよ
うに仕上スタンドの工程概念図において、 図２の如く
、仕上スタンドの最終圧延スタンドのロール１ａ，１ｂ
の表面に、例えば渦電流方式等の変位センサー４ａ，４
ｂを設け、ロール表面の微小な変位をオンラインで実測
することにより、最終圧延スタンドのロールの孔型の径
、即ち製品の仕上がり外径を制御装置５により演算させ
、このデータをもとに、最終圧延スタンドのロールギャ
ップ量を調整すべく、ロール軸２ａ，２ｂを移動させる
電動機３ａ，３ｂに指令を出し、 常時安定した仕上が
り外径を供給することが可能となる。また、ロール表面
の変位を定量的に実測することにより、ロール摩耗量を
把握することが可能となるため、 摩耗によるロール表
面の肌荒れも事前に予知できる。[Means for Solving the Problems] In the process conceptual diagram of a finishing stand as shown in FIG.
For example, displacement sensors 4a, 4 of eddy current type etc. are mounted on the surface of
b, and by actually measuring minute displacements on the roll surface online, the diameter of the hole of the roll of the final rolling stand, that is, the finished outer diameter of the product, is calculated by the control device 5, and based on this data, In order to adjust the roll gap amount of the final rolling stand, a command is issued to the electric motors 3a and 3b that move the roll shafts 2a and 2b, making it possible to always supply a stable finished outer diameter. In addition, by quantitatively measuring the displacement of the roll surface, it is possible to determine the amount of roll wear, so roughness of the roll surface due to wear can be predicted in advance.
【０００５】[0005]
【実施例】鋼管製品寸法（外径・肉厚）３４．０φ×３
．２ｍｍの低炭素鋼一般配管用鋼管製造時に、渦電流方
式の変位センサー（直径約２０ｍｍ）を用いて、圧延ロ
ール表面との距離（変位）を測定し、 本発明の外径制
御を行った結果、図３の如く、安定した鋼管外径が得ら
れることが確認された。この場合、初期のロールギャッ
プは、０．５ｍｍで狙いの外径が仕上がるようにロール
孔型形状は設定されている。
最終仕上げスタンドのロール孔型径 Ｄｆ＝Ｄｏ｛１
＋α（ｔ−ｔｏ）｝
Ｄｏ：製品外径、ｔ：圧延温度、ｔｏ：常温 α：線
膨張係数ロール孔型寸法 ロール巾 Ｗ＝Ｄｆ、ロ
ール深さ ｅ＝１／２（Ｄｆ−ｇ）ｇ：ロールギャッ
プ圧延途中に、ロール表面が摩耗により変化し、孔型径
が増加すれば、ロールギャップを０．５→０．４ｍｍと
孔型径の増加部分だけ、減少させることにより、安定し
たロール孔型径を保持する。実施例では、約０．２ｍｍ
のロールギャップを調整することにより、 安定した仕
上がり外径を得ることができた。尚、鋼管の仕上がり外
径の確認は、製品（冷間）の外径をノギス等の測定で行
った。[Example] Steel pipe product dimensions (outer diameter/wall thickness) 34.0φ x 3
．． Results of controlling the outer diameter of the present invention by measuring the distance (displacement) from the rolling roll surface using an eddy current displacement sensor (approximately 20 mm in diameter) during the manufacture of 2 mm low carbon steel pipes for general piping. As shown in FIG. 3, it was confirmed that a stable outer diameter of the steel pipe could be obtained. In this case, the roll hole shape is set so that the initial roll gap is 0.5 mm and the desired outer diameter is achieved. Roll hole diameter of final finishing stand Df=Do{1
+ α (t-to)} Do: Product outer diameter, t: Rolling temperature, TO: Room temperature α: Linear expansion coefficient Roll hole size Roll width W = Df, Roll depth e = 1/2 (Df-g) g : During roll gap rolling, if the roll surface changes due to wear and the hole diameter increases, the roll gap can be reduced from 0.5 to 0.4 mm by the increased portion of the hole diameter, resulting in a stable roll. Maintain hole diameter. In the example, about 0.2 mm
By adjusting the roll gap, we were able to obtain a stable finished outer diameter. The finished outer diameter of the steel pipe was confirmed by measuring the outer diameter of the product (cold) using a caliper or the like.
【０００６】[0006]
【発明の効果】図３に示す如く、本発明により、安定し
た仕上がり外径を供給することが可能となった。 この
ため、寸法精度の高い、高品質の鋼管を製造できるばか
りでなく、外径のマージン削減による歩留向上も実現で
きる。また、外径寸法の異常値や、ロール肌荒れによる
鋼管表面肌荒れを、即座に検知し、修正することが可能
となり、不良品の大量発生を未然に防止することができ
た。As shown in FIG. 3, the present invention has made it possible to provide a stable finished outer diameter. Therefore, it is not only possible to manufacture high-quality steel pipes with high dimensional accuracy, but also to improve yield by reducing the outer diameter margin. In addition, it became possible to immediately detect and correct abnormal values of the outer diameter dimension and roughness on the surface of the steel pipe due to roll roughness, thereby preventing the production of a large number of defective products.
【図１】仕上げ圧延スタンドの図、[Figure 1] Diagram of finishing rolling stand,
【図２】本発明の最終仕上げスタンドの鋼管圧延方法を
示す図、FIG. 2 is a diagram showing the steel pipe rolling method of the final finishing stand of the present invention;
【図３】鋼管の外径制御した場合の比較図である。FIG. 3 is a comparison diagram when controlling the outer diameter of a steel pipe.
１ａ，１ｂ 最終仕上スタンド
２ａ，２ｂ 主駆動軸
３ａ，３ｂ ロールギャップ調整用モーター４ａ，４
ｂ 変位センサー
５ 制御装置1a, 1b Final finishing stands 2a, 2b Main drive shafts 3a, 3b Roll gap adjustment motors 4a, 4
b Displacement sensor 5 control device
Claims (2)
て、オンラインで圧延ロール表面の摩耗等による微小な
変位を変位センサー等を用いて検出し、その信号により
ロールギャップ量をコントロールして、常時安定した鋼
管外径に仕上げることを特徴とする、鋼管の高速熱間圧
延工程における、圧延ロール表面変位のオンライン測定
による鋼管圧延方法。[Claim 1] In the process of hot rolling steel pipes at high speed, minute displacements due to wear on the rolling roll surface are detected online using a displacement sensor, etc., and the roll gap amount is controlled based on the signal. A steel pipe rolling method that uses online measurement of rolling roll surface displacement in a high-speed hot rolling process of steel pipes, which is characterized by finishing the steel pipe to a stable outer diameter.
て、オンラインで圧延ロール表面の摩耗等による微小な
変位を変位センサー等を用いて検出し、その信号により
ロールの摩耗による肌荒れ状態を監視し、圧延鋼管の表
面肌をオンラインで把握することを特徴とする、鋼管の
高速熱間圧延工程における、圧延ロール表面変位のオン
ライン測定による鋼管圧延方法。[Claim 2] In the process of hot rolling steel pipes at high speed, minute displacements due to abrasion of the rolling roll surface are detected online using a displacement sensor, etc., and the rough surface condition due to roll abrasion is monitored based on the signal. , a steel pipe rolling method using online measurement of rolling roll surface displacement in a high-speed hot rolling process of steel pipes, which is characterized by online grasping of the surface texture of the rolled steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3109550A JPH04319009A (en) | 1991-04-16 | 1991-04-16 | Method for rolling steel tube by on-line measuring displacement of surface of rolling roll in high-speed hot rolling process for steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3109550A JPH04319009A (en) | 1991-04-16 | 1991-04-16 | Method for rolling steel tube by on-line measuring displacement of surface of rolling roll in high-speed hot rolling process for steel tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04319009A true JPH04319009A (en) | 1992-11-10 |
Family
ID=14513086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3109550A Withdrawn JPH04319009A (en) | 1991-04-16 | 1991-04-16 | Method for rolling steel tube by on-line measuring displacement of surface of rolling roll in high-speed hot rolling process for steel tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04319009A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693799A (en) * | 2017-04-07 | 2018-10-23 | 宝山钢铁股份有限公司 | A kind of online roll gap meter automatic running controller and control method |
| JP2021530363A (en) * | 2018-07-17 | 2021-11-11 | 静涛 韓 | Medium and small diameter thick metal pipes and their manufacturing methods |
| TWI788150B (en) * | 2021-12-20 | 2022-12-21 | 中國鋼鐵股份有限公司 | Method for measuring springback value of roll |
-
1991
- 1991-04-16 JP JP3109550A patent/JPH04319009A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693799A (en) * | 2017-04-07 | 2018-10-23 | 宝山钢铁股份有限公司 | A kind of online roll gap meter automatic running controller and control method |
| CN108693799B (en) * | 2017-04-07 | 2020-10-27 | 宝山钢铁股份有限公司 | Automatic operation controller and control method for online roll gap instrument |
| JP2021530363A (en) * | 2018-07-17 | 2021-11-11 | 静涛 韓 | Medium and small diameter thick metal pipes and their manufacturing methods |
| TWI788150B (en) * | 2021-12-20 | 2022-12-21 | 中國鋼鐵股份有限公司 | Method for measuring springback value of roll |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980711 |