JPS63165001A - Rolling method for thick plate - Google Patents

Rolling method for thick plate

Info

Publication number
JPS63165001A
JPS63165001A JP61308378A JP30837886A JPS63165001A JP S63165001 A JPS63165001 A JP S63165001A JP 61308378 A JP61308378 A JP 61308378A JP 30837886 A JP30837886 A JP 30837886A JP S63165001 A JPS63165001 A JP S63165001A
Authority
JP
Japan
Prior art keywords
rolling
pass
rolled
shape control
thick plate
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.)
Pending
Application number
JP61308378A
Other languages
Japanese (ja)
Inventor
Yoshiaki Ishihara
石原 慶明
Kazunori Yako
八子 一了
Shigeyasu Matsumoto
松本 重康
Mitsuru Yamawaki
山脇 満
Sadanori Nakayama
中山 定則
Fumitoshi Murakami
史敏 村上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP61308378A priority Critical patent/JPS63165001A/en
Publication of JPS63165001A publication Critical patent/JPS63165001A/en
Pending legal-status Critical Current

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  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

PURPOSE:To eliminate unstability in rolling of sheet materials, etc., and to permit stable shape control by executing thick plate rolling in accordance with the reference pass schedules registered by sizes and quality of rolled stocks. CONSTITUTION:The material quality, finish sheet thickness, width, etc., of a material 1 to be rolled are first inputted via an input device 5 to a memory and arithmetic unit 6 in the case of rolling the sheet material having a sharp temp. drop during rolling or material having high temp. dependency of deformation resistance in thick plate rolling. The memory and arithmetic unit 6 determines the applicable group from the material quality sections which are previously stored by groups according to the change characteristics of the deformation resistance with temp. in accordance with the data inputted thereto. Said unit selects the reduction pattern numbers by the finish sheet thickness and width stored for each of the material quality sections from the finish sheet thickness and width data of the material 1. The unit reads out the stored reference reduction pattern and starts rolling by determining the reduction pattern of the shape pass, i.e., final 3-4 passes.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は厚板圧延方法、特に圧延が不安定な薄物材あ
るいは変形抵抗の温度依存性が高い材料等の圧延の安定
化に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a thick plate rolling method, and particularly to stabilization of rolling of thin materials whose rolling is unstable or materials whose deformation resistance is highly temperature dependent.

〔従来の技術〕[Conventional technology]

従来、被圧延材を複数パス往復圧延する厚板圧延におけ
る形状制御方法は、第4図に示すように圧延材1の板幅
中央の板厚hcと板端部の板厚り、を測定し、中央板厚
hcに対する中央板厚hcと端部板厚り、の差の割合、
すなわち比率クラウンΔC,−(h、−h、 )/hc
を算出し、比率クラウン変化が一定値もしくはある許容
範囲に入るように形状制御パスすなわち最終数パスでベ
ンダー力、シフト量、圧延荷重等を調整している。
Conventionally, a shape control method in plate rolling in which a material to be rolled is reciprocated in multiple passes measures the thickness hc at the center of the width of the rolled material 1 and the thickness at the edge of the material, as shown in Fig. 4. , the ratio of the difference between the center plate thickness hc and the end plate thickness to the center plate thickness hc,
That is, the ratio crown ΔC, −(h, −h, )/hc
is calculated, and the bender force, shift amount, rolling load, etc. are adjusted in the shape control pass, that is, the final few passes, so that the ratio crown change falls within a constant value or within a certain tolerance range.

この形状制御方法においては、各パス毎に前パスの実績
板厚、板クラウン、圧延荷重等を用いて初期圧下スケジ
ュールを修正する再スケジュールシステムを具備してい
るのが一般的である。
This shape control method generally includes a rescheduling system that corrects the initial rolling schedule for each pass using the actual plate thickness, plate crown, rolling load, etc. of the previous pass.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上記従来の圧延方法においては、各パス毎に再スケジュ
ールを作成する過程において圧延荷重、温度等を順次修
正し、比率クラウン変化を考慮して圧下スケジュールを
再編成するわけであるが、例えば仕上板厚が10.0m
m以下の薄物材の圧延では温度降下が非常に急峻である
ため最終圧延3〜4パスの形状側in tii域で被圧
延材の変形抵抗が急激に大となり、圧下スケジュールを
再編成する際に通正解を得ることが困難であった。同様
に変形抵抗の温度依存性が高い材料においても形状制御
パスにおける温度低下により上記パス間修正にて″適正
パススケジュールを得ることが困難であった。
In the conventional rolling method described above, in the process of creating a reschedule for each pass, the rolling load, temperature, etc. are sequentially corrected, and the rolling schedule is reorganized taking into account changes in the ratio crown. Thickness is 10.0m
When rolling thin materials with a thickness of less than m, the temperature drop is very steep, so the deformation resistance of the rolled material suddenly increases in the intii region on the shape side of the 3rd to 4th pass of the final rolling. It was difficult to get a correct answer. Similarly, even for materials whose deformation resistance is highly dependent on temperature, it is difficult to obtain an "appropriate pass schedule" through the above-mentioned inter-pass correction due to the temperature drop in the shape control pass.

このため圧延が不安定となり圧延途中で極大歪が発生し
たりして形状不良が生じるという問題点があった。
For this reason, there was a problem that rolling became unstable and maximum strain occurred during rolling, resulting in defective shape.

この発明は、かかる問題点を解決するためになされたも
のであり、薄物材等の圧延の不安定を解消し、安定な形
状制御を行なうことができる厚板圧延方法を提寓するこ
とを目的とするものである。
This invention was made to solve these problems, and the purpose is to propose a thick plate rolling method that can eliminate the instability of rolling thin materials and perform stable shape control. That is.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係る厚板圧延方法は、特に圧延中の温度降下
が急峻な薄物材あるいは変形抵抗の温度依存性が高い材
料の圧延における形状制御パスを圧延材寸法・材質別に
あらかじめ登録された基準パススケジュールにより行な
うことを特徴とする。
In the thick plate rolling method according to the present invention, the shape control path for rolling thin materials with a steep temperature drop during rolling or materials whose deformation resistance is highly temperature dependent is defined by a standard path registered in advance for each dimension and material quality of the rolled material. It is characterized by being carried out according to a schedule.

〔作 用〕 この発明においては、圧延中の温度降下が急峻な薄物材
あるいは変形抵抗の温度依存性が高い材料における形状
制御パススケジュールを圧延材寸法・材質別にあらかじ
め基準パススケジュールとして登録し、形状制御パスを
登録した基準パススケジュールに基いて行ない、形状制
御パスにおけるスケジュール修正を行なわず、安定した
形状制御を行なう。
[Function] In this invention, shape control pass schedules for thin materials whose temperature drops steeply during rolling or materials whose deformation resistance is highly temperature dependent are registered in advance as standard pass schedules for each rolled material size and material, and The control path is performed based on the registered reference path schedule, and stable shape control is performed without schedule modification in the shape control path.

〔実施例〕〔Example〕

第1図はこの発明の一実施例に係る圧延機の概略構成図
であり、図において1は圧延材、2は上ワークロール、
3は下ワークロールであり、上ワークロール2と下ワー
クロール3はパス間あるいはバー間においてロール軸方
向に各々シフトできるように構成されている。4は上・
下ワークロール2.3の上下に設けられたバックアップ
ロールである。
FIG. 1 is a schematic configuration diagram of a rolling mill according to an embodiment of the present invention, in which 1 is a rolled material, 2 is an upper work roll,
3 is a lower work roll, and the upper work roll 2 and the lower work roll 3 are configured to be able to shift in the roll axis direction between passes or between bars. 4 is above
These are backup rolls provided above and below the lower work roll 2.3.

5は圧延材lの材質、目標板厚、板幅等の諸元を入力す
る入力装置、6は入力装置5から入力される諸元及び前
パス時のロールギャップ、ベンダー力、シフト量又は板
プロフイル測定値等の圧延実績を記憶し、記憶した情報
より各パス毎のパススケジュールを決定し、またパス間
にて前パスの圧延実績により次パス以降のパススケジュ
ールを再修正する記憶・演算装置、7は記憶・演算装置
6で決定したパススケジュールにより各パスの圧延荷重
、ペングー力、シフト量等を出力する出力装置である。
5 is an input device for inputting specifications such as the material, target plate thickness, and plate width of the rolled material l; 6 is an input device for inputting specifications such as the material of the rolled material l, target thickness, and plate width; 6 is an input device for inputting specifications input from the input device 5, roll gap, bender force, shift amount, or plate during the previous pass; A storage/calculation device that stores rolling results such as profile measurement values, determines the pass schedule for each pass from the stored information, and re-corrects the pass schedule for the next pass and subsequent passes between passes based on the rolling results of the previous pass. , 7 is an output device that outputs the rolling load, force, shift amount, etc. of each pass according to the pass schedule determined by the storage/arithmetic device 6.

上記のように構成した圧延機により、圧延中の温度降下
が急峻な例えば仕上板厚が10.0mm以下の薄物材あ
るいは変形抵抗の温度依存性が高い材料を圧延する場合
には、まず第2図に示すように被圧延材1の温度に対す
る変形抵抗変化特性に応じて各材質区分A、B・・・・
・・・・・J毎にグループ別けを行ない、区分した各グ
ループ名A、B・・・・・・・・・Jを記憶・演算装置
6に記憶させる0次に、各材質区分A、B、・・・・・
・・・・J毎に基準とする仕上板厚、板幅側に形状制御
パスすなわち最終3〜4パスの圧下パターンを作成して
記憶・演算装置6に記憶する。
When rolling a thin material with a steep temperature drop during rolling, such as a finished plate thickness of 10.0 mm or less, or a material whose deformation resistance is highly dependent on temperature, using the rolling mill configured as described above, first As shown in the figure, each material classification A, B...
...Groups are performed for each J, and each group name A, B......J is stored in the storage/calculation device 6. Next, each material classification A, B is stored. ,...
. . . A shape control pass, that is, a rolling pattern for the final three to four passes, is created on the reference finished plate thickness and plate width side for each J, and is stored in the storage/arithmetic unit 6.

第1表は例えば材質区分Aにおける仕上板厚、板幅側に
定めた基準圧下パターン番号を示し、第1表においてり
、L+1.M、・・・・・・・・・は仕上板厚、板幅に
応じた圧下パターン番号である。
Table 1 shows, for example, the finished plate thickness in material classification A and the standard reduction pattern number determined on the plate width side. M, . . . are rolling pattern numbers corresponding to the finished plate thickness and plate width.

第  1  表 上記仕上板厚、板幅側に定めた圧下パターン番号り、L
+1.M、・・・・・・・・・に対応した形状制御圧下
量パターンを例えば第2表に示すように作成する。
Table 1 The above finished plate thickness, rolling pattern number determined on the plate width side, L
+1. A shape control reduction amount pattern corresponding to M, . . . is created, for example, as shown in Table 2.

第  2  表 上記のようにして各材質区分A、B、・・・・・・・・
・J毎に作成した形状制御パスの圧下パターン番号及び
圧下量パターンを入力装置5に入力して記憶・演算装置
6に記憶する。
Table 2 Each material classification A, B, etc. as shown above.
- Input the rolling pattern number and rolling amount pattern of the shape control path created for each J into the input device 5 and store them in the storage/arithmetic device 6.

上記のように構成した圧延機により、特に圧延中の温度
降下が急峻な薄物材等を圧延する場合の動作を第3図に
示すフローチャートに基いて説明する。
The operation of the rolling mill configured as described above when rolling a thin material whose temperature drops particularly sharply during rolling will be explained based on the flowchart shown in FIG. 3.

まず、被圧延材1のデータすなわち圧延材1の材質、仕
上板厚、板幅等を入力装置5を介して記憶・演算装置6
に入力する(ステップ31)、記憶・演算装置6では人
力された被圧延材1の材質のデータからあらかじめ温度
に対する変形抵抗変化特性に応じてグループ別けして記
憶しておいて材質区分A、B、・・・・・・・・・J中
から適用対象グループを決定する(ステップ32)0次
に被圧延材lの仕上板厚、板幅のデータより各材質区分
A、B。
First, the data of the rolled material 1, that is, the material, finished plate thickness, plate width, etc., of the rolled material 1 are sent to the storage/calculation device 6 via the input device 5.
(Step 31), the storage/calculation device 6 stores the data of the material of the rolled material 1 input manually in advance in groups according to the deformation resistance change characteristics with respect to temperature, and stores material classifications A and B. , . . . Determine the application target group from J (step 32) 0 Next, each material classification A and B is determined based on the data of the finished plate thickness and plate width of the rolled material l.

・・・・・・・・・J毎に記憶された仕上板厚、板幅別
の圧下パターン番号を選択する(ステップ33)0例え
ば被圧延材1の材質が第2図に示した材質区分Aに該当
し、仕上板厚が4.5 m m板幅が2500mmの場
合には第1表に示す圧下パターン番号M+1を選択する
0次にこの圧下パターン番号M+1より、第2表に示す
ようにあらかじめ作成され記憶されている基準圧下量パ
ターンを読出し形状制御パスすなわち最終3〜4パスの
圧下パターンを決定して(ステップ35)圧延を開始す
る(ステップ36)。
...... Select the rolled pattern number for each finished plate thickness and plate width stored for each J (step 33) 0 For example, if the material of the rolled material 1 is the material classification shown in Fig. 2 If it corresponds to A and the finished plate thickness is 4.5 mm and the plate width is 2500 mm, select rolling pattern number M+1 shown in Table 1.0 Next, from this rolling pattern number M+1, as shown in Table 2. The standard rolling reduction amount pattern created and stored in advance is read out, the rolling pattern for the shape control pass, that is, the final three to four passes is determined (step 35), and rolling is started (step 36).

この形状制御パスにおける圧下パターンの決定に際し、
実際の仕上板厚、板幅があらかじめパターン化した基準
値と数値が相違する場合、例えば実際の仕上板厚が4−
5 m m s板幅が2250mmの場合は第1表から
基準圧下パターン番号Mと基準圧下パターン番号M+1
を選択しくステップ33)、各圧下パターン番号に対応
する基準圧下量パターンを読出し補完を行ない(ステッ
プ34)、形状制御パスの圧下パターンを決定する(ス
テップ35)。
When determining the rolling pattern in this shape control pass,
If the actual finished plate thickness and plate width differ from the standard values that have been patterned in advance, for example, if the actual finished plate thickness is 4-
5 mm s If the plate width is 2250 mm, use the standard rolling pattern number M and standard rolling pattern number M+1 from Table 1.
is selected (step 33), the standard reduction amount pattern corresponding to each reduction pattern number is read out and complemented (step 34), and the reduction pattern of the shape control pass is determined (step 35).

上記のようにして形状制御パスの圧下パターンを決定し
た後に被圧延材1の圧延を行なうが、この際形状制御パ
スまでは前パスの実績厚、板クラウン等を用いた再スケ
ジュールシステムを用いて圧延を行ない、形状制御パス
に入ったら前パスの実績厚等によるスケジュール修正を
行なわずに、あらかじめ圧延材寸法・材質別に登録され
た基準パススケジュールで圧延を行なう、したがって形
状制御パスにおいては被圧延材1の材質、寸法に最適の
パススケジュールで圧延することができる。
After determining the rolling pattern of the shape control pass as described above, the material 1 to be rolled is rolled.At this time, up to the shape control pass, a rescheduling system using the actual thickness of the previous pass, plate crown, etc. is used. When rolling is performed and the shape control pass is entered, rolling is performed according to the standard pass schedule registered in advance for each rolled material size and material without making schedule corrections based on the actual thickness of the previous pass. Therefore, in the shape control pass, the rolled Rolling can be performed using a pass schedule that is optimal for the material and dimensions of material 1.

なお、上記実施例では形状制御パスの圧下量パターンを
記憶させた場合について説明したが、圧下量パターンと
同時にペングー力、シフト量等の諸設定値を記憶させて
も良く、また実際に圧延開始する時点の実測圧延材温度
により圧延開始前に、あらかじめ記憶しである圧下量パ
ターンを微調整しても良い。
In the above embodiment, the case where the rolling reduction amount pattern of the shape control pass is memorized is explained, but it is also possible to store various set values such as pen force and shift amount at the same time as the rolling amount pattern. The rolling reduction amount pattern, which is stored in advance, may be finely adjusted before the start of rolling based on the actually measured temperature of the rolled material at the time of rolling.

〔発明の効果〕〔Effect of the invention〕

この発明は以上説明したように、特に圧延中の温度降下
が急峻な薄物材あるいは変形抵抗の温度依存性が高い材
料の形状制御パスにおいては前パスの実績厚、板クラウ
ン等によるスケジュール修正を行なわず、あらかじめ圧
延材寸法・材質別に登録された基準パススケジュールに
基いて圧延を行なうようにしたので、形状制御パスの圧
延を圧延材寸法・材質に対して最適なパススケジュール
で行なうことができ、安定した形状制御を行なうことが
できる効果を有する。
As explained above, this invention corrects the schedule based on the actual thickness of the previous pass, plate crown, etc., especially in the shape control pass of thin materials whose temperature drops rapidly during rolling or materials whose deformation resistance is highly temperature dependent. First, rolling is performed based on a standard pass schedule registered in advance for each dimension and material of the rolled material, so rolling of shape control passes can be performed with the optimal pass schedule for the dimensions and material of the rolled material. This has the effect of allowing stable shape control.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の実施例を示すブロック図、第2図は
温度に対する変形抵抗変化特性図、第3図は上記実施例
の動作を示すフローチャート、第4図は従来例の説明図
である。 1・・・・・・・・・被圧延材、2・・・・・・・・・
上ワークロール、3・・・・・・・・・下ワークロール
、4・・・・・・・・・バックアップロール、5・・・
・・・・・・入力装置、6・・・・・・・・・記憶・演
算装置、7・・・・・・・・・出力装置。 代 理 人 弁理士 佐々木 宗 治 第2図 Δ 第4図 第3図
Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a characteristic diagram of deformation resistance change with respect to temperature, Fig. 3 is a flowchart showing the operation of the above embodiment, and Fig. 4 is an explanatory diagram of a conventional example. . 1...... Rolled material, 2......
Upper work roll, 3...Lower work roll, 4...Backup roll, 5...
. . . Input device, 6 . . . Storage/arithmetic device, 7 . . . Output device. Agent Patent Attorney Muneharu Sasaki Figure 2Δ Figure 4 Figure 3

Claims (1)

【特許請求の範囲】[Claims] 被圧延材を複数パス往復圧延する厚板圧延において、特
に圧延中の温度降下が急峻な薄物材あるいは変形抵抗の
温度依存性が高い材料の圧延における形状制御パルスを
圧延材寸法・材質別にあらかじめ登録された基準パスス
ケジュールにより行なうことを特徴とする厚板圧延方法
Shape control pulses are registered in advance for each size and material of the rolled material, especially when rolling thin materials with a steep temperature drop during rolling or materials whose deformation resistance is highly temperature dependent, in plate rolling where rolled materials are reciprocated in multiple passes. A thick plate rolling method characterized in that rolling is carried out according to a standard pass schedule.
JP61308378A 1986-12-26 1986-12-26 Rolling method for thick plate Pending JPS63165001A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61308378A JPS63165001A (en) 1986-12-26 1986-12-26 Rolling method for thick plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61308378A JPS63165001A (en) 1986-12-26 1986-12-26 Rolling method for thick plate

Publications (1)

Publication Number Publication Date
JPS63165001A true JPS63165001A (en) 1988-07-08

Family

ID=17980346

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61308378A Pending JPS63165001A (en) 1986-12-26 1986-12-26 Rolling method for thick plate

Country Status (1)

Country Link
JP (1) JPS63165001A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009028749A (en) * 2007-07-26 2009-02-12 Kobe Steel Ltd Method of deciding pass schedule in tandem rolling equipment
JP2019022899A (en) * 2017-07-24 2019-02-14 Jfeスチール株式会社 Method for rolling of thick steel plate, and method for production thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009028749A (en) * 2007-07-26 2009-02-12 Kobe Steel Ltd Method of deciding pass schedule in tandem rolling equipment
JP2019022899A (en) * 2017-07-24 2019-02-14 Jfeスチール株式会社 Method for rolling of thick steel plate, and method for production thereof

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