JPH0212642B2 - - Google Patents
Info
- Publication number
- JPH0212642B2 JPH0212642B2 JP56021751A JP2175181A JPH0212642B2 JP H0212642 B2 JPH0212642 B2 JP H0212642B2 JP 56021751 A JP56021751 A JP 56021751A JP 2175181 A JP2175181 A JP 2175181A JP H0212642 B2 JPH0212642 B2 JP H0212642B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- tension
- rolling
- stand
- rolling mill
- 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
- 238000005096 rolling process Methods 0.000 claims description 46
- 239000000463 material Substances 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 16
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims 4
- 230000001747 exhibiting effect Effects 0.000 claims 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000005098 hot rolling Methods 0.000 claims 1
- 239000012925 reference material Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
- B21B37/52—Tension control; Compression control by drive motor control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Description
【発明の詳細な説明】
本発明は、連続圧延機の制御方法に係り、複数
スタンドから成る金属熱間タンデム圧延機のスタ
ンド間の張力を制御する改良された圧延機制御方
法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous rolling mill control method, and more particularly to an improved rolling mill control method for controlling the tension between the stands of a metal hot tandem rolling mill consisting of a plurality of stands.
周知のように熱間タンデム圧延機のスタンド間
張力制御の方法には、圧延荷重を用いる方法また
は圧延トルクを用いる方法がある。 As is well known, there are two methods for controlling the tension between stands of a hot tandem rolling mill: a method using rolling load and a method using rolling torque.
スタンド間張力制御時に、材料温度が変化する
ことによる圧延トルクの変動は、張力制御精度を
劣化させる。この劣化の補正には各スタンド毎に
別途設けた圧延荷重計によつて圧延荷重の変動を
検出し、この検出出力に基づき、各スタンド毎に
前者の圧延荷重を用いる張力制御方法が用いられ
ているが、この補正方法は全体としての構成を複
数高価にし、圧延荷重計という保守を伴なう検出
器を保有するという欠点があつた。 During tension control between stands, fluctuations in rolling torque due to changes in material temperature degrade tension control accuracy. To correct this deterioration, a rolling load meter installed separately for each stand detects the variation in rolling load, and based on this detection output, a tension control method is used that uses the former rolling load for each stand. However, this correction method has the disadvantage that the overall structure is complicated and expensive, and it requires a detector called a rolling load meter that requires maintenance.
また、後者の圧延トルクを用いる張力制御方法
においては、圧延材料の温度等の材料特性が変化
すると制御がうまくいかない欠点を有した。これ
は無張力時に測定された圧延トルクの記憶値と、
材料特性が変化した時点での圧延トルク値とに差
が生ずるからである。 Furthermore, the latter tension control method using rolling torque has the disadvantage that control is not successful when material properties such as temperature of the rolled material change. This is the memorized value of rolling torque measured under no tension,
This is because a difference occurs in the rolling torque value at the time the material properties change.
ここにおいて本発明は、無張力時の圧延トルク
を測定記憶しその時の材料温度を基にし、かつ張
力時または圧縮時の圧延トルクを測定し、その時
の材料温度を知つて前記無張力時の材料温度との
差から、無張力時の圧延トルクが材料特性により
変動する量を補正してやり、これと前記張力時ま
たは圧縮時の圧延トルクとの差から張力または圧
縮力を求め、常時張力または圧縮力を良好に制御
し、また下流スタンド間においては材料温度降下
式に基づき上記と同様の制御を行なう熱間タンデ
ム圧延機における張力制御方法を提供することを
その目的とする。 Here, the present invention measures and stores the rolling torque at the time of no tension, based on the material temperature at that time, measures the rolling torque at the time of tension or compression, and knowing the material temperature at that time, rolls the material at the time of no tension. From the difference in temperature, the amount by which the rolling torque under no tension varies due to material properties is corrected, and the tension or compression force is determined from the difference between this and the rolling torque under tension or compression, and the constant tension or compression force is calculated. It is an object of the present invention to provide a tension control method in a hot tandem rolling mill, which performs the same control as described above based on the material temperature drop equation between downstream stands.
以下、図面を参照して本発明を詳細に説明す
る。 Hereinafter, the present invention will be explained in detail with reference to the drawings.
第１図は、熱間タンデム圧延機の概要を示す構
成図である。 FIG. 1 is a configuration diagram showing an outline of a hot tandem rolling mill.
圧延材１が＃１スタンド圧延機２と＃２スタン
ド圧延機３により、タンデム圧延されている状態
を表わし、スタンドは＃ｎスタンドまであり、
＃１スタンドを例にとれば、減速機４で結合され
たロール駆動用電動機５により＃１スタンドのロ
ールは駆動される。 It shows a state where the rolled material 1 is tandem rolled by #1 stand rolling mill 2 and #2 stand rolling mill 3, and there are up to #n stands,
Taking the #1 stand as an example, the rolls of the #1 stand are driven by a roll drive electric motor 5 coupled to a reduction gear 4.
熱間タンデム圧延機入側に、圧延材１の温度を
測定するための温度検出器６を設ける。 A temperature detector 6 for measuring the temperature of the rolled material 1 is provided on the inlet side of the hot tandem rolling mill.
ここで各スタンドにおける変数ないし定数を次
のように示しておく。ただしｉはスタンド番号に
相当する。 Here, the variables or constants in each stand are shown below. However, i corresponds to the stand number.
スタンド間距離 Li-1 〔ｍ〕
（このｉは２、３、…ｎである。）
各スタンドにおける材料温度 θi 〔℃〕
（以下ｉは１、２、３…ｎである。）
スタンド出側板厚 hi 〔ｍ〕
ロール周速度 vi 〔ｍ／hr〕
等価熱伝達係数 σi 〔Kcal／m2・hr・℃〕
基準材料温度 θRi 〔℃〕
材料比熱 Ｃ 〔Kcal／Kg・℃〕
材料比重 γ 〔Kg／m3〕
＃１スタンド入側温度 θIN 〔℃〕
周囲温度 θ0 〔℃〕
スタンド出側材料断面積 Ai 〔mm2〕
スタンド実効ロール半径 Ri 〔mm〕
減速比 ξi
電動機界磁磁束 Φi 〔Wb〕
電動機電機子電流 Iai 〔Ａ〕
電動機回転速度 Ni 〔rpm〕
前述したように材料温度により圧延トルクが変
動する。この圧延トルクの変動分△Geiを次式で
求める。Distance between stands L i-1 [m] (hereinafter i is 2, 3,...n) Material temperature at each stand θ i [℃] (hereinafter i is 1, 2, 3...n) Stand Output plate thickness h i [m] Roll circumferential speed v i [m/hr] Equivalent heat transfer coefficient σ i [Kcal/m 2・hr・℃] Reference material temperature θ Ri [℃] Material specific heat C [Kcal/Kg・℃] Material specific gravity γ [Kg/m 3 ] #1 stand entrance temperature θ IN [℃] Ambient temperature θ 0 [℃] Stand exit material cross-sectional area A i [mm 2 ] Stand effective roll radius R i [mm] Reduction ratio ξ i Motor field magnetic flux Φ i [Wb] Motor armature current I ai [A] Motor rotation speed N i [rpm] As mentioned above, the rolling torque varies depending on the material temperature. The variation in rolling torque △G ei is calculated using the following formula.
△Gei＝αi・（θRi−θi）
＝αi・△θi …（１式）
ここに、ｉ＝１、２、３、…ｎ
ただし、△θiは材料の基準温度からの変化分、
αiは各スタンド固有の影響係数で圧延材料、鋼
種、操業条件、圧延機の種類等の圧延条件で決ま
り学習により最適値を求めることもできる。△G ei = α i・(θ Ri −θ i ) = α i・△θ i … (1 equation) Here, i = 1, 2, 3, … n However, △θ i is calculated from the reference temperature of the material. The change in
α i is an influence coefficient unique to each stand and is determined by rolling conditions such as rolling material, steel type, operating conditions, and type of rolling mill, and the optimum value can be determined through learning.
熱間タンデム圧延機の入側の材料温度は温度検
出器により測定しθINであり、＃１スタンド２に
接近して温度検出器を設置すれば、＃１スタンド
２における材料温度（２式）となる。 The material temperature at the entrance side of the hot tandem rolling mill is measured by a temperature sensor and is θ IN.If a temperature sensor is installed close to #1 stand 2, the material temperature at #1 stand 2 (2 sets) becomes.
θ1＝θIN …（２式）
＃１スタンド２における基準となる材料温度
は、θ1のうち無張力での圧延トルク記憶時の材料
温度θR1とする。 θ 1 = θ IN (Formula 2) The reference material temperature in #1 stand 2 is the material temperature θ R1 of θ 1 at the time of memorizing the rolling torque without tension.
＃２スタンド３における材料温度θ2は、前記各
スタンドにおける変数ないし定数を用いて、材料
温度降下式に基づき
θ2＝θ0＋（θ1−θ0）・e-2O 1 The material temperature θ 2 in the #2 stand 3 is determined based on the material temperature drop formula using the variables or constants in each stand as θ 2 = θ 0 + (θ 1 −θ 0 )・e -2O 1
Claims (1)
て、無張力時の圧延トルクとその時の材料温度を
記憶し、タンデム圧延時の非線形特性を示す材料
温度と前記記憶した材料温度との差に応じて前記
記憶した無張力時の圧延トルクを修正し、タンデ
ム圧延時の圧延トルクと前記非線形特性を示す材
料温度の変化を補償した無張力時圧延トルクとの
差から材料に印加される張力または圧縮力を演算
して目標張力または圧縮力に制御することを特徴
とする熱間タンデム圧延機における張力制御方
法。 ２ その入側に温度検出器を設置して材料温度を
測定し、実測した圧延機入側材料温度から各スタ
ンドでの材料温度を予測して材料特性変化を補償
して制御することを特徴とする特許請求の範囲第
１項記載の熱間タンデム圧延機における張力制御
方法。 ３ その入側での材料温度を予め知得して、各ス
タンドの材料温度を予測し材料特性変化を補償す
ることを特徴とする特許請求の範囲第１項記載の
熱間タンデム圧延機における張力制御方法。 ４ 材料の時間的な温度降下または加熱炉固有の
材料低温部分を予測パターンとして予め知得し、
材料特性変化を補償することを特徴とする特許請
求の範囲第３項記載の熱間タンデム圧延機におけ
る張力制御方法。 ５ 圧延荷重検出器を設けた上流スタンドとそれ
に続く圧延荷重検出器を備えない下流スタンドか
らなり、上流スタンドの圧延荷重を知得してその
上流スタンドの材料温度を算出し、これを基にし
て材料特性変化を補償することを特徴とする特許
請求の範囲第１項記載の熱間タンデム圧延機にお
ける張力制御方法。[Claims] 1. In a continuous hot rolling mill consisting of a plurality of stands, the rolling torque under no tension and the material temperature at that time are memorized, and the material temperature exhibiting nonlinear characteristics during tandem rolling is combined with the stored material temperature. The memorized rolling torque when no tension is applied is corrected according to the difference between the two, and the rolling torque is applied to the material based on the difference between the rolling torque during tandem rolling and the rolling torque when no tension is compensated for the change in temperature of the material exhibiting the nonlinear characteristics. 1. A method for controlling tension in a hot tandem rolling mill, characterized in that the tension or compression force is calculated and controlled to a target tension or compression force. 2. A temperature sensor is installed on the entrance side to measure the material temperature, and the material temperature at each stand is predicted from the actually measured material temperature on the entrance side of the rolling mill to compensate for changes in material properties and control. A method for controlling tension in a hot tandem rolling mill according to claim 1. 3. Tension in the hot tandem rolling mill according to claim 1, characterized in that the temperature of the material on the entry side is known in advance, the material temperature of each stand is predicted, and changes in material properties are compensated for. Control method. 4. Know in advance the temperature drop of the material over time or the low temperature part of the material specific to the heating furnace as a predicted pattern,
4. A method for controlling tension in a hot tandem rolling mill according to claim 3, wherein the method comprises compensating for changes in material properties. 5 Consists of an upstream stand equipped with a rolling load detector and a downstream stand that is not equipped with a rolling load detector.The rolling load of the upstream stand is learned, the material temperature of the upstream stand is calculated, and the material temperature of the upstream stand is calculated based on this. A method for controlling tension in a hot tandem rolling mill according to claim 1, wherein the method comprises compensating for changes in material properties.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56021751A JPS57137015A (en) | 1981-02-17 | 1981-02-17 | Tension controlling method in hot tandem rolling mill |
| DE19823205589 DE3205589C2 (en) | 1981-02-17 | 1982-02-17 | Device for regulating the tension of the rolling stock in a tandem hot rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56021751A JPS57137015A (en) | 1981-02-17 | 1981-02-17 | Tension controlling method in hot tandem rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57137015A JPS57137015A (en) | 1982-08-24 |
| JPH0212642B2 true JPH0212642B2 (en) | 1990-03-23 |
Family
ID=12063761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56021751A Granted JPS57137015A (en) | 1981-02-17 | 1981-02-17 | Tension controlling method in hot tandem rolling mill |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS57137015A (en) |
| DE (1) | DE3205589C2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2134428B (en) * | 1983-02-03 | 1987-06-17 | Metal Box Plc | Continuous extrusion of metals |
| FR2788233B1 (en) | 1999-01-11 | 2001-02-23 | Alstom | METHOD OF CONTROLLING TRACTIONS / COMPRESSIONS IN A HOT MULTICAGE ROLLER AND CONTROL SYSTEM THEREOF |
-
1981
- 1981-02-17 JP JP56021751A patent/JPS57137015A/en active Granted
-
1982
- 1982-02-17 DE DE19823205589 patent/DE3205589C2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE3205589C2 (en) | 1986-04-17 |
| DE3205589A1 (en) | 1982-08-26 |
| JPS57137015A (en) | 1982-08-24 |
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