JPH07155818A - Method for rolling for reversible rolling mill - Google Patents
Method for rolling for reversible rolling millInfo
- Publication number
- JPH07155818A JPH07155818A JP5323400A JP32340093A JPH07155818A JP H07155818 A JPH07155818 A JP H07155818A JP 5323400 A JP5323400 A JP 5323400A JP 32340093 A JP32340093 A JP 32340093A JP H07155818 A JPH07155818 A JP H07155818A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- pass
- gradually
- time
- strip
- 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- Withdrawn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
Landscapes
- Control Of Metal Rolling (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は可逆式圧延機の圧延方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling method for a reversible rolling mill.
【0002】[0002]
【従来の技術】従来、可逆式圧延機においては、圧延機
の両側に巻取装置を配置し、帯状材の両端部のそれぞれ
を各巻取装置のマンドレルに巻付けた状態で、帯状材を
可逆的に複数パス圧延する。2. Description of the Related Art Conventionally, in a reversible rolling mill, winding devices are arranged on both sides of the rolling mill, and the strip material is reversible in a state in which both ends of the strip material are wound around the mandrels of the respective winding devices. Roll multiple passes.
【0003】[0003]
【発明が解決しようとする課題】然しながら、従来技術
では、各パスの圧延開始時に上下の圧延ロール間にある
帯状材の一端寄り中間部(巻取装置のマンドレルへの巻
取一端部から数巻分離れた部分)に一気に当該パスの全
圧下量(t0 −t1 )を加え(図4(A))、各パスの
圧延終了時には帯状材の他端寄り中間部(巻取装置のマ
ンドレルへの巻取他端部から数巻分離れた部分)から一
気に上記全圧下量を解放する。このため、帯状材は、上
述の一端寄り中間部と他端寄り中間部で図4(A)に示
す如くの圧延段差を生ずる。そして、この段差は、帯状
材を圧延の進行とともに巻取装置に巻取っていくとき、
帯状材の中間部の数巻〜数十巻の範囲に面折れを発生さ
せる原因となる(図4(B))。この面折れの発生は、
圧延張力の大なるステンレス鋼板等の圧延時に、巻取張
力も大となることから顕著となる。However, in the prior art, at the start of rolling of each pass, the intermediate portion of the strip-shaped material located between the upper and lower rolling rolls near one end (a few windings from one winding end on the mandrel of the winding device). The total amount of reduction (t 0 -t 1 ) of the pass is added to the (separated portion) at once (FIG. 4 (A)), and at the end of rolling of each pass, the intermediate portion (the mandrel of the winding device of the winding device) near the other end of the strip-shaped material (The part which is separated from the other end by several turns) is released all at once. Therefore, the strip-shaped material has a rolling step as shown in FIG. 4 (A) at the intermediate portion near the one end and the intermediate portion near the other end. And, this step is, when the strip-shaped material is wound on the winding device as the rolling progresses,
This causes surface bending in the range of several turns to several tens of turns in the middle part of the strip-shaped material (FIG. 4 (B)). The occurrence of this breakage is
This becomes remarkable because the winding tension also becomes large when rolling a stainless steel plate having a large rolling tension.
【0004】尚、特開平2-263515号公報には、帯状材の
マンドレルへの巻取り時に、帯状材の先端部がマンドレ
ル外周面に対してなす段差が、帯状材の数巻〜数十巻に
転写して生ずるトップマークの発生を防止するため、マ
ンドレルに段付きスリーブを装着するものを提案してい
る。然しながら、前述した可逆圧延時の面折れは、帯状
材の中間部に生ずる圧延段差に起因するものであり、帯
状材の先端部がマンドレル外周面に対してなす段差を解
消しようとする上記特開平2-263515号公報に記載の技術
では何ら全く解決できない。In Japanese Patent Laid-Open No. 2-263515, when a strip-shaped material is wound around a mandrel, the step formed by the tip of the strip-shaped material with respect to the outer surface of the mandrel is several to several tens of windings of the strip-shaped material. In order to prevent the generation of the top mark caused by the transfer to, the mandrel is proposed to have a stepped sleeve. However, the above-described surface breakage during reversible rolling is caused by a rolling step that occurs in the intermediate portion of the strip-shaped material, and the above-mentioned Japanese Patent Laid-Open Publication No. The technique described in Japanese Patent No. 2-263515 cannot solve the problem at all.
【0005】本発明は、可逆圧延される帯状材の巻取時
に帯状材の中間部に生ずる圧延段差起因の面折れを防止
することを目的とする。It is an object of the present invention to prevent surface breakage due to a rolling step that occurs in the intermediate portion of a strip-shaped material when the strip-shaped material to be reversibly rolled is wound.
【0006】[0006]
【課題を解決するための手段】本発明は、圧延機の両側
に巻取装置を配置し、帯状材の両端部のそれぞれを各巻
取装置のマンドレルに巻付けた状態で、帯状材を可逆的
に複数パス圧延する可逆式圧延機の圧延方法において、
各パスのうち少なくとも初期パスで、圧延開始時の圧下
力を徐々に増すことにて圧延開始端部の板厚変化を漸減
し、圧延終了時の圧下力を徐々に減ずることにて圧延終
了端部の板厚変化を漸増するようにしたものである。SUMMARY OF THE INVENTION According to the present invention, a winding device is arranged on both sides of a rolling mill, and both ends of the strip are wound around a mandrel of each winding device. In the rolling method of the reversible rolling mill that performs multiple pass rolling in
At least in the initial pass of each pass, the rolling force at the start of rolling is gradually increased to gradually reduce the plate thickness change at the rolling start end, and the rolling force at the end of rolling is gradually reduced to reduce the rolling end end. The change in plate thickness of the part is gradually increased.
【0007】[0007]
【作用】 各パスの圧延開始時に、帯状材は上下の圧延ロール間
にある該帯状材の一端寄り中間部(巻取装置のマンドレ
ルへの巻取一端部から数巻分離れた部分)に徐々に当該
パスの全圧下量(to −t1 )を加えられ、結果とし
て、圧延開始端部の板厚変化をテーパ状もしくは階段状
にて漸減せしめられる。[Operation] At the start of rolling in each pass, the strip is gradually moved to an intermediate portion between the upper and lower rolling rolls, close to one end of the strip (a part separated from the one end of winding on the mandrel of the winding device). The total reduction amount (t o −t 1 ) of the pass is applied to, and as a result, the plate thickness change at the rolling start end can be gradually reduced in a taper or step shape.
【0008】また、各パスの圧延終了時に、帯状材は
上下の圧延ロール間にある該帯状材の他端寄り中間部
(巻取装置のマンドレルへの巻取他端部から数巻分離れ
た部分)から徐々に当該パスの全圧下量(t0 −t1 )
を解放し、結果として、圧延終了端部の板圧変化をテー
パ状もしくは階段状にて漸増せしめられる。At the end of rolling in each pass, the strip-shaped material is separated from the other end of the strip-shaped material between the upper and lower rolling rolls by an intermediate portion (several windings from the other end of winding on the mandrel of the winding device). (Part) gradually decreasing the total amount of the pass (t 0 −t 1 ).
As a result, the plate pressure change at the end of rolling can be gradually increased in a taper shape or a step shape.
【0009】これにより、各パスの圧延時に、帯状材
の圧延開始端部、圧延終了端部に生ずる圧延段差を、巻
取り時に面折れを発生させない許容段差以内となるよう
に調整でき、圧延段差起因の面折れを防止できる。This makes it possible to adjust the rolling step generated at the rolling start end and the rolling end end of the strip during rolling in each pass so as to be within the allowable step which does not cause surface bending during winding, and the rolling step It is possible to prevent the bending of the surface.
【0010】尚、可逆圧延においては、全パスで圧延
段差を生ずるものの、全パスのうち初期パスの方が、
(a) 圧下率が同じでも圧延前板圧T0 が大であるため、
圧下量(t0 −t1 )が大となること、(b) 被圧延材料
が加工硬化する後パスに比して圧下率が大きく設定され
ていることから、圧延段差は大となる。よって、本発明
は各パスのうち初期パス側のパスで実施して特に有効で
ある。In reversible rolling, although a rolling step is generated in all passes, the initial pass of all passes is
(a) Since the pre-rolling plate pressure T 0 is large even if the reduction ratio is the same,
Since the amount of reduction (t 0 −t 1 ) is large and (b) the reduction ratio is set to be large compared to the post-pass where the material to be rolled is work hardened, the rolling step becomes large. Therefore, the present invention is particularly effective when implemented on the initial path side among the paths.
【0011】[0011]
【実施例】図1は可逆式圧延機を示す模式図、図2は本
発明によるテーパ状圧下状態を示す模式図、図3は本発
明による階段状圧下状態を示す模式図、図4は従来例を
示す模式図である。1 is a schematic diagram showing a reversible rolling mill, FIG. 2 is a schematic diagram showing a tapered reduction state according to the present invention, FIG. 3 is a schematic diagram showing a stepwise reduction state according to the present invention, and FIG. It is a schematic diagram which shows an example.
【0012】可逆式圧延機10は、その両側に巻取装置
11、12を配置し、帯状材Sの両端部のそれぞれを各
巻取装置11、12のマンドレル11A、12Aに巻付
けた状態で、帯状材Sを可逆的に複数パス圧延する。The reversible rolling mill 10 has winding devices 11 and 12 arranged on both sides thereof, and both ends of the strip S are wound around the mandrels 11A and 12A of the winding devices 11 and 12, respectively. The strip S is reversibly rolled in multiple passes.
【0013】可逆式圧延機10は、圧下シリンダ13に
より上下の圧延ロール14、15のギャップを変更し、
帯状材Sに所定の圧下量を付与可能としている。The reversible rolling mill 10 changes the gap between the upper and lower rolling rolls 14 and 15 by the reduction cylinder 13,
A predetermined amount of reduction can be applied to the strip material S.
【0014】以下、可逆式圧延機10による圧延方法に
ついて説明する。 (1) 両巻取装置11、12のマンドレル11A、12A
のそれぞれに帯状材Sの両端部を巻付け、帯状材Sに張
力を付与した状態で、各パスの圧延を開始する。The rolling method by the reversible rolling mill 10 will be described below. (1) Mandrels 11A, 12A of both winding devices 11, 12
Both ends of the strip-shaped material S are wrapped around each of the strips, and tension is applied to the strip-shaped material S, and rolling of each pass is started.
【0015】(2) 全パス、もしくは全パスを構成する各
パスのうち少なくとも初期パス側のパスで、圧下シリン
ダ13を用いて、(a) 圧延開始時の圧下力を徐々に増す
ことにて圧延開始端部の板圧変化を漸減し、(b) 圧延終
了時の圧下力を徐々に減ずることにて圧延終了端部の板
圧変化を漸増する。(2) By using the reduction cylinder 13 in at least the initial pass side of all passes or each of the passes forming all the passes, (a) the rolling force at the start of rolling can be gradually increased. The plate pressure change at the rolling end is gradually reduced, and (b) the rolling force at the rolling end is gradually increased by gradually reducing the rolling force at the end of rolling.
【0016】圧下シリンダ13による上記(a) 、(b) の
板圧変化の漸減、漸増制御は、図2のテーパ状あるいは
図3の階段状の如くになされる。The gradual reduction and gradual increase control of the plate pressures (a) and (b) by the pressure reduction cylinder 13 are performed in the taper shape of FIG. 2 or the step shape of FIG.
【0017】以下、本実施例の作用について説明する。 各パスの圧延開始時に、帯状材Sは上下の圧延ロール
14、15間にある該帯状材Sの一端寄り中間部(巻取
装置11のマンドレル11Aへの巻取一端部から数巻分
離れた部分)に徐々に当該パスの全圧下量(to −t
1 )を加えられ、結果として、圧延開始端部の板厚変化
をテーパ状もしくは階段状にて漸減せしめられる。The operation of this embodiment will be described below. At the start of rolling of each pass, the strip material S is separated from the one end portion of the strip material S between the upper and lower rolling rolls 14 and 15 (the winding device 11 is wound around the mandrel 11A by several turns). Gradually decrease to the total reduction amount (t o −t) of the pass.
1 ) is added, and as a result, the change in plate thickness at the rolling start end can be gradually reduced in a taper or step shape.
【0018】また、各パスの圧延終了時に、帯状材S
は上下の圧延ロール14、15間にある該帯状材Sの他
端寄り中間部(巻取装置12のマンドレル12Aへの巻
取他端部から数巻分離れた部分)から徐々に当該パスの
全圧下量(t0 −t1 )を解放し、結果として、圧延終
了端部の板圧変化をテーパ状もしくは階段状にて漸増せ
しめられる。At the end of rolling in each pass, the strip material S
Is gradually moved from the intermediate portion near the other end of the strip S between the upper and lower rolling rolls 14 and 15 (a portion separated from the other end of the winding of the winding device 12 onto the mandrel 12A) by several passes. The total reduction amount (t 0 −t 1 ) is released, and as a result, the plate pressure change at the end of rolling can be gradually increased in a taper shape or a step shape.
【0019】これにより、各パスの圧延時に、帯状材
Sの圧延開始端部、圧延終了端部に生ずる圧延段差を、
巻取り時に面折れを発生させない許容段差以内となるよ
うに調整でき、圧延段差起因の面折れを防止できる。As a result, the rolling step generated at the rolling start end and the rolling end end of the strip S during rolling in each pass is
It can be adjusted so as to be within an allowable step difference that does not cause a surface break during winding, and it is possible to prevent a surface break due to a rolling step.
【0020】以下、本発明の具体的実施結果について説
明する。圧延張力が大であって巻取張力が大となり、圧
延段差起因の面折れを生じ易いステンレス鋼板の可逆圧
延において、本発明方法の実施により、従来の歩留りロ
ス 1%を 0.2%に低減できることを認め、本発明の効果
が極めて顕著であることを求めた。The specific results of carrying out the present invention will be described below. In the reversible rolling of the stainless steel sheet, which has a large rolling tension and a large winding tension, and is likely to cause surface bending due to the rolling step, it is possible to reduce the conventional yield loss of 1% to 0.2% by implementing the method of the present invention. It was confirmed that the effect of the present invention was extremely remarkable.
【0021】[0021]
【発明の効果】以上のように本発明によれば、可逆圧延
される帯状材の巻取時に帯状材の中間部に生ずる圧延段
差起因の面折れを防止することができる。As described above, according to the present invention, it is possible to prevent the surface breakage due to the rolling step which occurs in the intermediate portion of the strip-shaped material when the strip-shaped material to be reversibly rolled is wound.
【図1】図1は可逆式圧延機を示す模式図である。FIG. 1 is a schematic diagram showing a reversible rolling mill.
【図2】図2は本発明によるテーパ状圧下状態を示す模
式図である。FIG. 2 is a schematic view showing a tapered rolled-down state according to the present invention.
【図3】図3は本発明による階段状圧下状態を示す模式
図である。FIG. 3 is a schematic view showing a stepwise rolled state according to the present invention.
【図4】図4は従来例を示す模式図である。FIG. 4 is a schematic view showing a conventional example.
S 帯状材 10 可逆式圧延機 11、12 巻取装置 11A、12A マンドレル 13 圧下シリンダ S Band-shaped material 10 Reversible rolling mill 11, 12 Winding device 11A, 12A Mandrel 13 Rolling cylinder
Claims (1)
材の両端部のそれぞれを各巻取装置のマンドレルに巻付
けた状態で、帯状材を可逆的に複数パス圧延する可逆式
圧延機の圧延方法において、 各パスのうち少なくとも初期パスで、圧延開始時の圧下
力を徐々に増すことにて圧延開始端部の板厚変化を漸減
し、圧延終了時の圧下力を徐々に減ずることにて圧延終
了端部の板厚変化を漸増することを特徴とする可逆式圧
延機の圧延方法。1. A reversible rolling method in which a winding device is arranged on both sides of a rolling mill, and the strip material is reversibly rolled in a plurality of passes in a state where both ends of the strip material are wound around the mandrels of the respective winding devices. In the rolling method of the rolling mill, in at least the initial pass of each pass, the rolling force at the start of rolling is gradually increased to gradually reduce the thickness change at the rolling start end and gradually reduce the rolling force at the end of rolling. In particular, a rolling method for a reversible rolling mill characterized by gradually increasing the plate thickness change at the end of rolling.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5323400A JPH07155818A (en) | 1993-11-30 | 1993-11-30 | Method for rolling for reversible rolling mill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5323400A JPH07155818A (en) | 1993-11-30 | 1993-11-30 | Method for rolling for reversible rolling mill |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07155818A true JPH07155818A (en) | 1995-06-20 |
Family
ID=18154295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5323400A Withdrawn JPH07155818A (en) | 1993-11-30 | 1993-11-30 | Method for rolling for reversible rolling mill |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07155818A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112337970A (en) * | 2020-10-22 | 2021-02-09 | 河南中孚高精铝材有限公司 | Double-frame cold rolling mill bottoming thick head control method |
-
1993
- 1993-11-30 JP JP5323400A patent/JPH07155818A/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112337970A (en) * | 2020-10-22 | 2021-02-09 | 河南中孚高精铝材有限公司 | Double-frame cold rolling mill bottoming thick head control method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH07155818A (en) | Method for rolling for reversible rolling mill | |
JPH0663606A (en) | Method for rolling metallic foil | |
US2166418A (en) | Method of rolling | |
JP2752589B2 (en) | Shape control method and apparatus for continuous rolling mill | |
JPH10263610A (en) | Continuous hot rolling method of steel plate | |
CA2431156A1 (en) | Winding web onto seriatim cores with feedback control of axial force and length | |
JP2004090079A (en) | Edge drop controller for rolling mill | |
JP2762888B2 (en) | Steel strip winding method | |
JP3947284B2 (en) | Method for manufacturing rolled coil | |
JP3294138B2 (en) | Hot rolling equipment and hot rolling method | |
JP4077804B2 (en) | Metal plate rolling method | |
JPS64130B2 (en) | ||
JPH05277536A (en) | Method and device for controlling correction of meandering of steel plate | |
JPH02303607A (en) | Rolling mill and rolling method for very thin and wide hoop | |
JPH05293542A (en) | Method for preventing necking of hot rolling steel sheet | |
JP3339207B2 (en) | Metal strip | |
JP4306001B2 (en) | Running shape control method in sheet rolling | |
JP2831840B2 (en) | Winding method of metal band | |
JPH0129601B2 (en) | ||
JPH0360803A (en) | Cold rolling method for stainless steel strip | |
JPS6241154A (en) | Method of controlling louver roll for hot rolled material | |
JPS63303610A (en) | Method for preventing lapping of rolled stock | |
FI82619B (en) | TILLVERKNINGSFOERFARANDE FOER METALLBAND. | |
JPH07136717A (en) | Method for controlling take-up machine | |
JP3294139B2 (en) | Hot rolling equipment and hot rolling method |
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: 20010130 |