JPH0579406B2 - - Google Patents
Info
- Publication number
- JPH0579406B2 JPH0579406B2 JP58204688A JP20468883A JPH0579406B2 JP H0579406 B2 JPH0579406 B2 JP H0579406B2 JP 58204688 A JP58204688 A JP 58204688A JP 20468883 A JP20468883 A JP 20468883A JP H0579406 B2 JPH0579406 B2 JP H0579406B2
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- roll gap
- difference
- rolled material
- control
- 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 59
- 238000000034 method Methods 0.000 claims description 11
- 230000015654 memory Effects 0.000 description 19
- 238000010438 heat treatment Methods 0.000 description 10
- 238000005452 bending Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000007704 transition Effects 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
- B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/12—Rolling load or rolling pressure; roll force
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、圧延機により圧延される圧延材の蛇
行を防止する圧延機の制御方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a rolling mill control method for preventing meandering of a rolled material rolled by a rolling mill.
従来の圧延機の板厚制御は左右板厚の平均値が
一定となるように制御されているだけであり、左
右の板厚の差の補正は、オペレータによる手動操
作に頼つているのが現状である。このために、ス
タンド間の張力を大きくできない。特にホツトス
トリツプタンデム圧延機では通板時に蛇行が発生
しやすく、圧延作業の能率を低下させる原因とな
つている。
Plate thickness control in conventional rolling mills is only controlled so that the average value of the left and right plate thicknesses is constant, and correction of the difference in plate thickness between the left and right sides currently relies on manual operations by the operator. It is. For this reason, the tension between the stands cannot be increased. In particular, in hot strip tandem rolling mills, meandering tends to occur during sheet passing, which causes a reduction in the efficiency of the rolling operation.
第１図は、従来の蛇行防止制御方法を示したも
のである。 FIG. 1 shows a conventional meandering prevention control method.
第１図による従来方法は、操作側（WS）およ
び駆動側（DS）の各々の無負荷時相当のロール
ギヤツプSw，Sdと、圧延荷重Pw，Pdを検出す
ることによりWSとDSの圧延材の厚み差Δhdfを
見出し、この厚み差の方向と量に応じてWSとDS
のロールギヤツプ差を制御することにより圧延中
の圧延材の蛇行を防止する制御方法である。 The conventional method shown in Fig. 1 detects the roll gap Sw, Sd equivalent to no-load conditions on the operation side (WS) and drive side (DS), and the rolling loads Pw, Pd. Find the thickness difference Δhdf, and calculate WS and DS according to the direction and amount of this thickness difference.
This is a control method for preventing meandering of a rolled material during rolling by controlling the roll gap difference.
演算増巾器１４によりWSの圧延荷重PwとDS
の圧延荷重Pdとの差Pdfを演算し、演算増巾器１
５により差荷重Pdfにα／Ｋの係数をかける。Ｋ
は圧延機片側のバネ定数（TON／mm）であり、こ
の値はあらかじめ実測され、この実測値が設定さ
れる。又、αは制御常数である。 The rolling load Pw and DS of WS are calculated by the calculation amplifier 14.
Calculate the difference Pdf from the rolling load Pd of
5, the differential load Pdf is multiplied by the coefficient α/K. K
is the spring constant (T ON /mm) on one side of the rolling mill, and this value is actually measured in advance, and this measured value is set. Further, α is a control constant.
一方、演算増巾器１６により無負荷時相当の
WSのロールギヤツプSwとDSのロールギヤツプ
Sdとの差Sdfを演算する。演算増巾器１８は、演
算増巾器１６の出力値Sdfと、演算増巾器１５の
出力値α／Ｋ・Pdfと、そしてロツクオンサーボ１
７の出力値を入力し、下式(1)による圧延材１の左
右の厚み差Δhdfを演算出力する。 On the other hand, the operational amplifier 16 allows the
WS roll gap Sw and DS roll gap
Calculate the difference Sdf from Sd. The operational amplifier 18 inputs the output value Sdf of the operational amplifier 16, the output value α/K·Pdf of the operational amplifier 15, and the output value of the lock-on servo 17, and calculates the following formula (1 ) is calculated and outputs the thickness difference Δhdf between the left and right sides of the rolled material 1.
Δhdf＝（Sdf＋α／Ｋ・Pdf）−hdfm ……(1)
ここで、hdfmは圧延材のかみ込み時点の圧延
機の操作側と駆動側の厚み差であり、圧延材のか
み込み時点の差荷重Pdfとロールギヤツプ差Sdf
に基づき、上記(1)式からΔhdfを演算し、かかる
Δhdfを零とするような値である。 Δhdf=(Sdf+α/K・Pdf)−hdfm...(1) Here, hdfm is the difference in thickness between the operation side and drive side of the rolling mill at the time of biting of the rolled material, Load Pdf and roll gap difference Sdf
Based on this, Δhdf is calculated from the above equation (1), and the value is such that Δhdf is set to zero.
厚み差Δhdf信号はΔhdf＝０となるように圧下
装置１２及び１３にレベリング圧下指令として出
力される。 The thickness difference Δhdf signal is output as a leveling reduction command to the reduction devices 12 and 13 so that Δhdf=0.
以上による自動レベリング圧下操作により圧延
材１の蛇行は防止される。 Meandering of the rolled material 1 is prevented by the automatic leveling reduction operation as described above.
ここで、実際圧延時の差荷重Pdfは、第２図ａ
に示すように、圧延材１が圧延ロール２の幅方向
中心位置にかみ込まれたのにもかかわらずアンバ
ランス差荷重Pdfcが生じる特性をもつている。
ロツクオンサーボ１７は、このアンバランス差荷
重による厚み差の演算誤差を除去するためのもの
である。圧延材１が圧延ロール２にかみ込まれる
制御がスタートする迄は、リレー接点１９は開、
２０は閉となつている。第２図ａでのＡ時点で圧
延材がかみ込まれ、かみ込み時点の差荷重Pdfc
が生じると、演算増巾器１８の出力Δhdfが零と
なるようにリレー接点２０とロツクオンサーボ１
７から成るフイードバツクループにより操作さ
れ、Δhdf＝０となつた時点でロツクオンサーボ
１７の出力値hdfmは保持されると同時にリレー
接点２０は開、１９が閉となり制御がスタートさ
れる。 Here, the differential load Pdf during actual rolling is shown in Figure 2 a.
As shown in FIG. 2, the rolling material 1 has a characteristic that an unbalanced differential load Pdfc occurs even though the rolled material 1 is caught in the center position of the rolling roll 2 in the width direction.
The lock-on servo 17 is for eliminating calculation errors of the thickness difference due to this unbalanced difference load. The relay contact 19 is open until the control starts in which the rolled material 1 is bitten by the rolling roll 2.
20 is closed. The rolled material is bitten at point A in Figure 2 a, and the differential load Pdfc at the biting point is
occurs, the relay contact 20 and the lock-on servo 1 are connected so that the output Δhdf of the operational amplifier 18 becomes zero.
When Δhdf=0, the output value hdfm of the lock-on servo 17 is held, and at the same time, the relay contact 20 is opened and the relay contact 19 is closed, and control is started.
上記したように、従来方法においては、圧延材
のかみ込み時点の厚み差hdfmを基準とした制御
が行なわれる。 As described above, in the conventional method, control is performed based on the thickness difference hdfm at the time of biting of the rolled material.
しかし、実際の圧延においては、圧延材１の先
端部は前段ミルの圧延で第２図ｃに示すように曲
りが生じ、圧延機中心からずれてかみ込まれる。
この結果、差荷重Pdfは第２図ｂの斜線で示すよ
うな挙動となる。このために圧延材の先端曲りに
よる圧延機中心よりずれた点を基準として制御さ
れることになり、誤つた制御が行われ、制御によ
り圧延に悪い影響を与えてしまう。 However, in actual rolling, the leading end of the rolled material 1 is bent as shown in FIG. 2c during rolling by the preceding mill, and is bitten off the center of the rolling mill.
As a result, the differential load Pdf behaves as shown by diagonal lines in FIG. 2b. For this reason, control is performed based on a point deviated from the center of the rolling mill due to the bending of the tip of the rolled material, resulting in incorrect control and adversely affecting rolling.
第２図ａでのＢ時点の尻ぬけにより制御は停止
されるが、真の尻ぬけ時点に対して尻ぬけの検出
に遅れがあるために、制御は尻ぬけ時の差荷重の
大きな変化に追従し、尻ぬけ制御停止后のロール
ギヤツプ差は0.5〜１mmと大きく誤つてしまう。
このために、オペレータは圧延かみ込み前（Ａ時
点前）のロールギヤツプ差を読みとつておき、尻
ぬけ時に大きく誤つたロールギヤツプ差を次材圧
延に備えて手動操作により先に読みとつた値に戻
す方法によつている。しかし、この方法では、圧
延の進行にともなつて変化するロールギヤツプ差
の適正値に対応できず、制御をかけることによ
り、かえつて圧延中の手動修正回数が増大すると
いつた不便が生じる結果となつている。 The control is stopped due to the bottom slippage at time B in Fig. 2a, but since there is a delay in detecting the bottom slippage compared to the true bottom slippage point, the control is stopped due to a large change in the differential load at the bottom slippage. Following this, the roll gap difference after the end of the trailing control is stopped is 0.5 to 1 mm, which is a large error.
For this purpose, the operator must read the roll gap difference before rolling biting (before time A), and manually return the roll gap difference, which was largely incorrect at the time of bottom slippage, to the previously read value in preparation for rolling the next material. It depends on the method. However, this method cannot cope with the appropriate value of the roll gap difference that changes as rolling progresses, and applying control results in inconveniences such as an increase in the number of manual corrections during rolling. ing.
本発明は上記従来技術に鑑みなされたものあ
り、その目的は、圧延材の先端曲りによる圧延機
中心のずれや、圧延材の尻ぬけ時の差荷重の大き
な変化に対しても安定的な制御が可能となる圧延
機の制御方法を提供することにある。
The present invention has been made in view of the above-mentioned prior art, and its purpose is to provide stable control even when the center of the rolling mill shifts due to bending of the tip of the rolled material and large changes in the differential load when the rolled material bottoms out. The object of the present invention is to provide a method for controlling a rolling mill that enables the following.
上記目的を達成するために本発明では、無負荷
時における圧延機の操作側及び駆動側各々の圧延
荷重とロールギヤツプを検出し、これらの検出値
から操作側と駆動側の差荷重とロールギヤツプ差
を演算し、該差荷重とロールギヤツプ差に基づき
操作側と駆動側の圧延材の厚み差を演算し、この
厚み差を基準として圧延中の圧延材の蛇行を防止
する圧延機の制御方法において、先行して圧延さ
れた圧延材の制御完了時の差荷重とロールギヤツ
プ差をメモリーし、次圧延材の圧延時に、該メモ
リーされた差荷重とロールギヤツプ差を基準とし
て操作側と駆動側の圧延材の厚み差を演算し、こ
の演算された厚み差に応じて操作側及び駆動側の
圧延荷重を制御して操作側及び駆動側のロールギ
ヤツプ差を制御するものである。
In order to achieve the above object, the present invention detects the rolling load and roll gap on the operating side and the driving side of the rolling mill when no load is applied, and calculates the differential load and roll gap between the operating side and the driving side from these detected values. In a rolling mill control method, the thickness difference between the rolled material on the operation side and the drive side is calculated based on the differential load and the roll gap difference, and this thickness difference is used as a reference to prevent meandering of the rolled material during rolling. The differential load and roll gap difference at the time of completion of control of the rolled material are memorized, and when the next rolled material is rolled, the thickness of the rolled material on the operation side and drive side is determined based on the memorized differential load and roll gap difference. The difference is calculated, and the rolling loads on the operating side and the driving side are controlled according to the calculated thickness difference, thereby controlling the roll gap difference between the operating side and the driving side.
つまり、先行して圧延された圧延材の作業側と
駆動側の厚み差を基準に次圧延材の圧延が制御さ
れるので、次圧延材の先端曲りによる圧延機中心
のずれや、先行して圧延された圧延材の尻ぬけに
よる差荷重の大きな変化による制御遅れに対して
も、圧延材の先端部より尻ぬけ時に至るまで安定
的な制御が可能となる。 In other words, since the rolling of the next rolled material is controlled based on the thickness difference between the working side and the driving side of the previously rolled material, there is no possibility of deviation of the center of the rolling mill due to the bending of the tip of the next rolled material, or Even with a control delay due to a large change in the differential load due to the bottom shedding of the rolled material, stable control is possible from the tip of the rolled material up to the time the bottom comes off.
〔発明の実施例〕 第３図に、本発明による一実施例を示す。[Embodiments of the invention] FIG. 3 shows an embodiment according to the present invention.
メモリー２１及び２２は、先行材のレベリング
圧下手動操作完了后の差荷重及びロールギヤツプ
差をメモリーするためのものであり、そのメモリ
ー値が各々Pdfm及びSdfmである。 The memories 21 and 22 are for storing the differential load and roll gap difference after the manual leveling operation of the preceding material is completed, and the memory values thereof are Pdfm and Sdfm, respectively.
第４図は、圧延制御時の差荷重Pdf及びロール
ギヤツプ差Sdfの動きを示したものである。 FIG. 4 shows the movements of the differential load Pdf and the roll gap difference Sdf during rolling control.
Ａ時点で圧延材がかみ込まれ制御がスタートさ
れる。Ｂ時点でオペレータによるレベリング圧下
手動操作が行われ、Ｃ時点で完了する。制御はＢ
〜Ｃ時点間ではオペレータの操作と干渉するので
１時中断される。第３図でのリレー接点２３及び
２４は圧延中は図示の通りの状態となつており、
実差荷重Pdfと実ロールギヤツプ差Sdfが各々演
出増巾器１５及び１８にとり込まれる。一方、リ
レー接点２５は圧延中は開となつている。 At time A, the rolled material is bitten and control is started. At time B, the operator performs a manual leveling reduction operation, which is completed at time C. Control is B
- C is interrupted for 1 hour because it interferes with the operator's operation. The relay contacts 23 and 24 in Fig. 3 are in the state as shown during rolling,
The actual difference load Pdf and the actual roll gap difference Sdf are taken into the performance amplifiers 15 and 18, respectively. On the other hand, the relay contact 25 is open during rolling.
Ｂ時点で手動操作が開始されると同時にリレー
接点１９は閉から開となり制御を中断する一方、
リレー接点２０は同時に開から閉となりロツクオ
ンサーボ１７によるロツクオン操作（演算増巾器
１８の出力Δhdf＝０操作）が開始される。Ｃ時
点での手動操作終了時点でロツクオン操作による
Δhaf＝０完了が確認され、Δhdf＝０となつてい
れば、リレー接点２０は開となると同時にロツク
オンサーボ１７の出力値hdfmは保持され、リレ
ー接点１９が開から閉となり、制御は手動操作完
了時点を基準として再スタートされる。一方、手
動操作完了Ｃ時点では、メモリー２１及び２２に
この時点での差荷重PdfがPdfmとして、そして
ロールギヤツプ差SdfがSdfmとしてメモリーされ
る（前回メモリー値はすてられ、今回値に更新さ
れる）。 At the same time as the manual operation is started at time B, the relay contact 19 changes from closed to open and control is interrupted.
At the same time, the relay contact 20 changes from open to closed, and the lock-on operation by the lock-on servo 17 (operation where the output Δhdf of the operational amplifier 18 is 0) is started. At the end of the manual operation at time C, it is confirmed that the lock-on operation has completed Δhaf = 0, and if Δhdf = 0, the relay contact 20 opens and at the same time the output value hdfm of the lock-on servo 17 is held, and the relay The contact point 19 changes from open to closed, and control is restarted based on the point at which the manual operation is completed. On the other hand, at time C when manual operation is completed, the differential load Pdf at this point is stored as Pdfm in the memories 21 and 22, and the roll gap difference Sdf is stored as Sdfm (the previous memory value is discarded and updated to the current value). ).
圧延が進行し、Ｄ時点で圧延材の尻ぬけとな
る。制御はＤ時点での尻ぬけ時に生じて圧延和荷
重の急激な変化をとらえて尻ぬけを検出するが、
実際には真の尻ぬけに対して検出が遅れるので、
制御はＤ時点での尻ぬけ時の差荷重の大きな動き
に追従し、ロールギヤツプ差を大きく変えてしま
う。 The rolling progresses and at point D the rolled material reaches its bottom. The control detects the bottom slippage by capturing the sudden change in the rolling total load that occurs when the bottom slips out at time D.
In reality, there is a delay in the detection of true buttholes, so
The control follows the large movement of the differential load at the time of tail exit at time D, and the roll gap difference changes greatly.
第４図ｂでのＤ時点での値Sdftは、尻ぬけ検出
により制御が停止された時点のロールギヤツプ差
値を示したものである。この状態で、次の圧延材
を圧延すると、次材先端部の圧延で絞り込みが生
じて圧延が停止することになる。このために、尻
ぬけ后Ｅ時点で第３図のリレー接点２５は開から
閉となり、メモリー２２のメモリー値Sdfmが圧
下装置１２，１３に出力され実ロールギヤツプ差
をメモリー値Sdfmに等しくセツトする操作を行
なう。リレー接点２５は、実ロールギヤツプ差が
メモリー値Sdfmと等しくセツトされたＦ時点で
閉から開となり、実ロールギヤツプ差はこの状態
で保持される。 The value Sdft at time D in FIG. 4b indicates the roll gap difference value at the time when the control is stopped due to detection of tail-end slippage. In this state, when the next rolling material is rolled, the rolling of the leading end of the next material causes narrowing and the rolling stops. For this reason, the relay contact 25 shown in FIG. 3 changes from open to closed at the time E after the bottom exit, and the memory value Sdfm in the memory 22 is output to the lowering devices 12 and 13, and an operation is performed to set the actual roll gap difference equal to the memory value Sdfm. Do this. The relay contact 25 changes from closed to open at time F when the actual roll gap difference is set equal to the memory value Sdfm, and the actual roll gap difference is maintained in this state.
一方、尻ぬけ検出により（Ｄ時点）、リレー接
点１９は閉から開となり制御は停止され、同時に
リレー接点２３，２４は第３図の図示状態とは反
対側に切替えられ、そして、リレー接点２０も開
から閉となりロツクオン操作が開始される。 On the other hand, as a result of the bottom slippage detection (time point D), the relay contact 19 changes from closed to open, and the control is stopped. At the same time, the relay contacts 23 and 24 are switched to the opposite side from the state shown in FIG. 3, and the relay contact 20 The lock-on operation starts from opening to closing.
Ｇ時点で次の圧延材がかみ込まれると、ロツク
オン操作によるΔhdf＝０完了が確認され、Δhdf
＝０となつていれば、リレー接点２０は閉から開
となると同時にロツクオンサーボ１７の出力値
hdfmは保持され、そして、リレー接点２３，２
４は第３図の図示状態に再び切替えられると同時
にリレー接点１９が開から閉となり制御がスター
トされる。 When the next rolled material is bitten at time G, it is confirmed that Δhdf = 0 due to the lock-on operation, and Δhdf
= 0, the relay contact 20 changes from closed to open, and at the same time the output value of the lock-on servo 17 changes.
hdfm is held and relay contact 23,2
4 is switched again to the state shown in FIG. 3, and at the same time the relay contact 19 changes from open to closed and control is started.
なお、前記したロツクオン操作によるΔhdfの
値がゼロでない（Δhdf≠０）のときは、
演算増幅器１５の出力値α／Ｋ・Pdfmとメモリー
２２の出力値Sdfmとの加算値α／Ｋ・Pdfm＋Sdfm
にロツクオンサーボ１７の出力値Δhdfが等しく
ない状態、すなわち、ロツクオン操作が完了して
いない状態であるので、この場合は、Δhdf＝０
となるまでロツクオン操作が継続される。 Note that when the value of Δhdf due to the lock-on operation described above is not zero (Δhdf≠0), the sum of the output value α/K·Pdfm of the operational amplifier 15 and the output value Sdfm of the memory 22 is α/K·Pdfm+Sdfm. Since the output values Δhdf of the lock-on servo 17 are not equal, that is, the lock-on operation has not been completed, in this case, Δhdf=0.
The lock-on operation continues until .
以上から明らかなように、Ｇ時点での制御の厚
み差の基準値hdfmは、先行材の手動操作終了后
のＣ時点の基準値hdfmと同じ値が適用されるこ
とになる。Ｇ時点以降手動操作が行なわれる迄は
この基準値は変更されず、手動操作が行なわれる
と、先に説明したＢからＣ時点の制御操作が実行
され、このくり返えしにより圧延が行なわれる。
又、１つの圧延材の中で２度以上の手動操作が行
なわれた場合は、最后の手動操作時点の基準値
hdfmが次の圧延材に適用される。尚、第４図ａ
に示した先端部曲りの存在するゾーンＩ、及び前
段ミル尻ぬけに入側張力が無くなる後端部ゾーン
は圧延が不安定となる部分であるので、このゾ
ーンＩ〜で手動操作が行なわれた場合のメモリ
ー２１，２２のメモリー値更新は行なわないよう
にし、次材への適用を排除するようにしている。 As is clear from the above, the reference value hdfm of the control thickness difference at time G is the same as the reference value hdfm at time C after the manual operation of the preceding material is completed. This reference value is not changed until manual operation is performed after time G, and when manual operation is performed, the control operations from time B to time C described above are executed, and rolling is performed by repeating this process. .
In addition, if manual operation is performed twice or more on one rolled material, the reference value at the time of the last manual operation
HDFM is applied to the following rolled materials: Furthermore, Figure 4a
Zone I, where there is a bend in the tip shown in Figure 1, and the rear end zone, where the entry tension is lost at the front end of the mill, are areas where rolling becomes unstable, so manual operation was performed in Zone I ~. In this case, the memory values of the memories 21 and 22 are not updated, and application to the next material is excluded.
第５図は、特定の加熱炉で加熱された圧延材の
各圧延スタンドでの差荷重のメモリー値の推移を
示したものである。Fnが最終スタンド、Fn-1、
Fn-2は各々その前段スタンドである。差荷重値
は、加熱炉の加熱特性変化にともなつて連続的に
変化するが、板幅及び板厚のスケジユール変更に
より不連続的に変化することはない。従つて先行
材の圧延データを次材の制御に適用する本発明に
よる方法が成り立つことがわかる。 FIG. 5 shows the transition of the memory value of the differential load at each rolling stand of a rolled material heated in a specific heating furnace. Fn is the final stand, Fn -1 ,
Fn -2 is its front stand. The differential load value changes continuously as the heating characteristics of the heating furnace change, but it does not change discontinuously due to schedule changes in plate width and plate thickness. Therefore, it can be seen that the method according to the present invention in which the rolling data of the preceding material is applied to the control of the next material is valid.
タンデム圧延機での先行材のメモリー操作は、
制御用スタンドのいずれかで手動操作が行なわれ
た場合は、手動操作が行なわれたスタンドのみメ
モリー値の更新を行なうのではなく、他スタンド
も同時にメモリー値の更新を行なう。これは、タ
ンデム圧延機の場合は、張力により全スタンドが
つながつており、１つのスタンドでの手動操作は
他のスタンドにもその影響がつたわるためであ
る。 The memory operation of the preceding material in the tandem rolling mill is
When manual operation is performed on any of the control stands, the memory values are not updated only on the stand where the manual operation was performed, but on the other stands as well. This is because in the case of a tandem rolling mill, all stands are connected by tension, and manual operation on one stand will have an effect on the other stands.
加熱炉が複数設備されている場合は、個々の加
熱炉に対応してメモリー２１，２２を複数個設け
ることにより加熱炉毎に選択してメモリーし、抽
出される次材の加熱炉No.と同一の先行材の加熱炉
のNo.のメモリー値を次材に適用する方法をとるこ
とにより、個々の加熱炉の加熱特性の変化に対応
することもできる。 If multiple heating furnaces are installed, a plurality of memories 21 and 22 are provided corresponding to each heating furnace, so that each heating furnace is selected and stored in memory, and the heating furnace number of the next material to be extracted is stored. By applying the memory value of the heating furnace No. of the same preceding material to the next material, it is also possible to respond to changes in the heating characteristics of individual heating furnaces.
本発明によれば、オペレータにより圧延の状況
が確認された先行材の手動操作完了時点を基準と
して制御されるので、圧延材の先端部より尻ぬけ
時に至るまで適正な制御が可能となり、制御性能
が向上し、圧延の安定性を向上できる。又、尻ぬ
け時に大きく変化したロールギヤツプ差は自動的
に先行材のロールギヤツプ差のメモリー値に次材
圧延に備えて設定されるのでオペレータの負担が
なくなると共に適確な設定が可能となる。
According to the present invention, since the control is performed based on the point in time when the manual operation of the preceding material is completed when the rolling status has been confirmed by the operator, appropriate control is possible from the tip of the rolled material to the end of the rolling material, and control performance is improved. This improves rolling stability. In addition, the roll gap difference that has changed significantly during the tailing is automatically set in the memory value of the roll gap difference of the preceding material in preparation for rolling the next material, which eliminates the burden on the operator and allows for accurate setting.
第１図、第２図は従来方法の説明図、第３図は
本発明の一実施例の実施装置系統図、第４図、第
５図は本発明の説明図である。
１……圧延材、２……圧延ロール、３……補強
ロール、４〜５……圧延荷重計、６，８……油圧
ジヤツキ、７，９……油圧ジヤツキラム、１０〜
１１……無負荷時ロールギヤツプ検出器、１２〜
１３……圧下装置、１４〜１６，１８……演算増
巾器、１７……ロツクオンサーボ、１９〜２０，
２３〜２５……リレー接点、２１〜２２……メモ
リー。
FIGS. 1 and 2 are explanatory diagrams of a conventional method, FIG. 3 is a system diagram of an apparatus for implementing an embodiment of the present invention, and FIGS. 4 and 5 are explanatory diagrams of the present invention. 1...Rolled material, 2...Roll roll, 3...Reinforcement roll, 4-5...Rolling load cell, 6, 8...Hydraulic jack, 7, 9...Hydraulic jack ram, 10-
11...No-load roll gap detector, 12~
13... Lowering device, 14-16, 18... Arithmetic amplifier, 17... Lock-on servo, 19-20,
23-25...Relay contact, 21-22...Memory.
Claims (1)
各々の圧延荷重とロールギヤツプを検出し、これ
らの検出値から操作側と駆動側の差荷重とロール
ギヤツプ差を演算し、該差荷重とロールギヤツプ
差に基づき操作側と駆動側の圧延材の厚み差を演
算し、この厚み差を基準として圧延中の圧延材の
蛇行を防止する圧延機の制御方法において、 先行して圧延された圧延材の制御完了時の差荷
重とロールギヤツプ差をメモリーし、 次圧延材の圧延時に、該メモリーされた差荷重
とロールギヤツプ差を基準として操作側と駆動側
の圧延材の厚み差を演算し、この演算された厚み
差に応じて操作側及び駆動側の圧延荷重を制御し
て操作側及び駆動側のロールギヤツプ差を制御す
ることを特徴とする圧延機の制御方法。[Claims] 1. Detect the rolling load and roll gap on the operation side and drive side of the rolling mill under no load, calculate the differential load and roll gap between the operation side and drive side from these detected values, and In a rolling mill control method that calculates the thickness difference between the rolled material on the operation side and the drive side based on the differential load and roll gap difference, and uses this thickness difference as a reference to prevent the rolled material from meandering during rolling, The differential load and roll gap difference at the time of completion of control of the rolled material are memorized, and when rolling the next rolled material, the difference in thickness between the rolled material on the operating side and the driving side is calculated based on the memorized differential load and roll gap difference. A method for controlling a rolling mill, characterized in that the roll gap difference between the operating side and the driving side is controlled by controlling the rolling loads on the operating side and the driving side in accordance with the calculated thickness difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58204688A JPS6099415A (en) | 1983-11-02 | 1983-11-02 | Control method of rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58204688A JPS6099415A (en) | 1983-11-02 | 1983-11-02 | Control method of rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6099415A JPS6099415A (en) | 1985-06-03 |
| JPH0579406B2 true JPH0579406B2 (en) | 1993-11-02 |
Family
ID=16494656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58204688A Granted JPS6099415A (en) | 1983-11-02 | 1983-11-02 | Control method of rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6099415A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3585826B2 (en) | 2000-11-24 | 2004-11-04 | 株式会社直方建材 | Energy saving house and method of forming floor heating device in it |
| KR100498068B1 (en) * | 2000-12-21 | 2005-07-01 | 주식회사 포스코 | Method of in-line rolling for strip casting |
| JP4617585B2 (en) * | 2001-03-19 | 2011-01-26 | Ｊｆｅスチール株式会社 | Method and apparatus for preventing drawing of rear end portion of material to be rolled in continuous rolling |
-
1983
- 1983-11-02 JP JP58204688A patent/JPS6099415A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6099415A (en) | 1985-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4685777B2 (en) | Wedge setting and control method in sheet metal rolling | |
| JPH0579406B2 (en) | ||
| JPH0218168B2 (en) | ||
| JP2795551B2 (en) | Camber control method in hot rolling mill | |
| JPS6111123B2 (en) | ||
| JP3521081B2 (en) | Strip width control method in hot finishing mill | |
| KR101879092B1 (en) | Apparatus and method for measuring camber in hot rolling process | |
| JP3347572B2 (en) | Meandering control method for tandem rolling mill | |
| JP3321085B2 (en) | Centering method of rolled material | |
| JPH048122B2 (en) | ||
| JPH0616891B2 (en) | Rolling control method | |
| JPS6243763B2 (en) | ||
| JP3237559B2 (en) | Thickness control method of hot continuous rolling mill | |
| JPH0566203B2 (en) | ||
| JPH05269516A (en) | Method for controlling shape in rolling of thick plate | |
| JP2001137918A (en) | Setup method of hot-rolling mill | |
| JP3350294B2 (en) | Control method and control device for tandem mill | |
| JPH04284910A (en) | Method for controlling plate width in hot rolling mill | |
| JPH05220511A (en) | Method for controlling thickness in continuous hot rolling mill | |
| JPH06269821A (en) | Controller for flat shape of rolling mill | |
| JPH0470083B2 (en) | ||
| JPS6372416A (en) | Thickness compensation method for bited end part of rolled stock | |
| JPH0628763B2 (en) | Plate thickness control device for rolling mill | |
| JPH06328111A (en) | Method for controlling leveling in hot rolling | |
| JPH0211324B2 (en) |