JPH07121403B2 - Method for polishing pinch roll for hot rolled steel strip winder - Google Patents
Method for polishing pinch roll for hot rolled steel strip winderInfo
- Publication number
- JPH07121403B2 JPH07121403B2 JP15021787A JP15021787A JPH07121403B2 JP H07121403 B2 JPH07121403 B2 JP H07121403B2 JP 15021787 A JP15021787 A JP 15021787A JP 15021787 A JP15021787 A JP 15021787A JP H07121403 B2 JPH07121403 B2 JP H07121403B2
- Authority
- JP
- Japan
- Prior art keywords
- pinch roll
- steel strip
- polishing
- pinch
- winder
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
- B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
- B21B28/04—Maintaining rolls in effective condition, e.g. reconditioning while in use, e.g. polishing or grinding while the rolls are in their stands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/006—Pinch roll sets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、熱延鋼帯巻取機用ピンチロールの研磨方法に
関するものである。The present invention relates to a method for polishing a pinch roll for a hot-rolled steel strip winder.
熱延鋼帯巻取機用ピンチロールのポリッシャーとして、
圧延間の僅かな時間中にピンチロールの疵取りを行うこ
との出来る装置として、実開昭57−116303号公報に『上
ピンチロール用ロールポリシャー』が提案されている
が、ピンチロールを圧延(巻取)作業中に研磨出来る技
術としては未開発である。そのため巻き取られるべき鋼
帯の先端がピンチロールガイドに衝突してできる鋼帯先
端部のカエリが、かみこみ時ピンチロール表面に焼きつ
き疵をつくり、後続の鋼帯にその疵を転写することが多
発していた。As a polisher for pinch rolls for hot rolled steel strip winders,
As a device capable of removing flaws from pinch rolls during a short time between rollings, "Roll polisher for upper pinch rolls" has been proposed in Japanese Utility Model Publication No. 57-116303, but rolling pinch rolls ( It is not yet developed as a technique that can be used during polishing. Therefore, when the tip of the steel strip to be wound collides with the pinch roll guide, the burrs at the tip of the steel strip make a burn mark on the pinch roll surface when it is bitten, and transfer the flaw to the subsequent steel strip. Was occurring frequently.
圧延(巻き取り)中に研磨が困難とされる理由は、次の
通りである。The reason why polishing is difficult during rolling (winding) is as follows.
(イ)圧延(巻き取り)中に研磨を行うと、研磨中はピ
ンチロール回転に対する抵抗が大きく、ピンチロール駆
動電動機の定格負荷の50%程にも達するので回転速度が
低下し、巻き取り中であると仕上圧延機とピンチロール
間に張力が無くなり、ループができて正常な巻き取りが
できなくなる。(ロ)またそのために、ポリッシャーの
研磨能を低下(押付け力の減少等)させてピンチロール
駆動電動機への負荷を小さくすると、ピンチロールにで
きた疵を除去できなくなる。(B) If polishing is performed during rolling (winding), the resistance against pinch roll rotation is large during polishing, and the rotation speed decreases as much as about 50% of the rated load of the pinch roll drive motor, causing the rotation speed to decrease during winding. In that case, tension is lost between the finish rolling mill and the pinch roll, and a loop is formed, which prevents normal winding. (B) Therefore, if the polishing ability of the polisher is reduced (the pressing force is reduced) to reduce the load on the pinch roll driving motor, it becomes impossible to remove the flaws formed on the pinch roll.
この現象を第2,3,4図によりさらに詳しく説明すると、
ピンチロール5,6に焼き付ききずや擦りきずが発生する
と、人手により砥石を用いて研磨除去してきた。この手
間を省くためポリシャー装置8,9が考案されたが、研磨
中はピンチロール回転に対する抵抗が大きく、ピンチロ
ール駆動電動機の定格負荷の50%にも達することがあ
り、従ってピンチロール回転速度が低下し、ピンチロー
ル5,6と鋼帯1が接触し、巻取中であると仕上圧延機2
とピンチロール5,6間の張力が無くなり、ループが発生
し正常な巻取が不可能となる。逆にポリシャー研磨能力
を低下させ、ピンチロール電動機への負荷を小さくする
と、ピンチロール5,6に発生したきず11を除去できなく
なる。よって、ポリシャー研磨は巻取中以外のアイドル
中に行うことになるが、この方法によると、ピンチロー
ルきず11の連続発生は防止できるが完全には該ピンチロ
ールきずを防止できない。しかもピンチロールきず11の
殆どは鋼帯最先端1aが案内ガイド10に衝突した際発生す
るカエリ12が原因であるので、コイル全長にわたってき
ず13が発生することになる。This phenomenon will be explained in more detail with reference to Figs.
When seizure flaws or scratches were generated on the pinch rolls 5 and 6, they were manually removed by polishing with a grindstone. Polisher devices 8 and 9 have been devised to save this effort, but the resistance to pinch roll rotation during polishing is large, and the pinch roll drive motor may reach 50% of the rated load. When it is lowered, the pinch rolls 5 and 6 come into contact with the steel strip 1, and the finish rolling mill 2
The tension between the pinch rolls 5 and 6 disappears and a loop occurs, making normal winding impossible. Conversely, if the polisher polishing ability is reduced and the load on the pinch roll motor is reduced, it becomes impossible to remove the flaw 11 generated on the pinch rolls 5 and 6. Therefore, the polisher polishing is performed during idling other than during winding. According to this method, continuous occurrence of the pinch roll flaws 11 can be prevented, but the pinch roll flaws cannot be completely prevented. Moreover, since most of the pinch roll flaws 11 are caused by the burrs 12 generated when the leading edge 1a of the steel strip collides with the guide guide 10, the flaws 13 are generated over the entire length of the coil.
本発明は、圧延(巻き取り)中にピンチロール研磨を行
う新規な研磨方法を提供し、ピンチロール起因の鋼帯ロ
ール疵をなくすることを目的とするものである。An object of the present invention is to provide a novel polishing method for performing pinch roll polishing during rolling (winding), and to eliminate a steel strip roll defect caused by a pinch roll.
本発明は、鋼帯の熱間圧延において、仕上圧延機を出た
鋼帯の先端が巻取機用ピンチロールに噛み込み直後もし
くは直前からピンチロールを通過し巻取機に到達するま
で、ピンチロールに搭載したポリッシャーによりピンチ
ロールの研磨を行うことを特徴とする熱延鋼帯巻取機用
ピンチロールの研磨方法である。なお、上記ポリッシャ
ーにより研磨を行うとともに巻取中にも上ピンチロール
を前記鋼帯の上部に引き上げて研磨を続行するようにし
てもよい。The present invention, in the hot rolling of the steel strip, until the tip of the steel strip that has exited the finish rolling mill bites into the pinch roll for the winder until it reaches the winder after passing through the pinch roll from immediately before or immediately before it reaches the winder. A method for polishing a pinch roll for a hot-rolled steel strip winding machine, which comprises polishing the pinch roll by a polisher mounted on the roll. The polishing may be performed by the polisher and the upper pinch roll may be pulled up to the upper portion of the steel strip to continue the polishing even during winding.
本発明者等は、圧延(巻き取り)中のピンチロール研磨
について種々検討したところ、仕上圧延機をでた鋼帯の
先端は最初は走行スピードが遅くその段階ではピンチロ
ールの周速の方が速く、そのためポリッシャーを押しつ
けて研磨するとピンチロールの回転速度が落ちるが、仕
上圧延機−ピンチロール間にはループが生じないことに
相到した。そうであれば、仕上圧延機を出た鋼帯の先端
がピンチロールに焼きつきを起こす巻き取りの初期にピ
ンチロール表面についた疵を研磨してしまえば、後続の
鋼帯にピンチロール疵を転写することは起こらないので
ある。The present inventors have made various studies on pinch roll polishing during rolling (winding), and at the end of the steel strip exiting the finish rolling machine, the traveling speed is slow at first and the peripheral speed of the pinch roll is better at that stage. Since the rotation speed of the pinch roll was low when the polishing was performed by pressing with a polisher, the loop speed did not occur between the finish rolling mill and the pinch roll. If so, the tip of the steel strip exiting the finish rolling machine will cause seizure on the pinch roll.If the flaw on the pinch roll surface is polished in the early stage of winding, the pinch roll flaw will be formed on the subsequent steel strip. Transcription does not occur.
第1図(a)(b)は本発明の実施例を示すものであ
る。まず鋼帯1がピンチロール5,6にかみこむ前にポリ
シャー8,9を該ピンチロール5,6に接触、研磨している状
態で待機させる(第1図(a))。次に鋼帯先端1aがピ
ンチロール5,6にかみこみ、その際にピンチロール5,6に
焼き付く異物をポリシャー8,9で除去する。この時、ピ
ンチロール5,6は鋼帯通板速度よりも高速で回転してい
るので、ポリシャー8,9で研磨することによりピンチロ
ール周速が低くなっても、圧延機2とピンチロール5,6
間にループは発生せず、正常な巻取が可能である(第1
図(b))。ポリシャー8,9は鋼帯先端1aがマンドレル
7に到達するタイミングでピンチロール5,6から切り離
し研磨を中断する。1 (a) and 1 (b) show an embodiment of the present invention. First, before the steel strip 1 bites into the pinch rolls 5 and 6, the polishers 8 and 9 are kept in contact with and polished in the pinch rolls 5 and 6 (FIG. 1 (a)). Next, the tip 1a of the steel strip bites into the pinch rolls 5 and 6, and foreign substances that stick to the pinch rolls 5 and 6 at that time are removed by the polishers 8 and 9. At this time, since the pinch rolls 5 and 6 are rotating at a speed higher than the steel strip threading speed, even if the peripheral speed of the pinch rolls becomes low by polishing with the polishers 8 and 9, the rolling mill 2 and the pinch rolls 5 , 6
A loop does not occur between them and normal winding is possible (1st
Figure (b)). The polishers 8 and 9 are separated from the pinch rolls 5 and 6 at the timing when the steel strip tip 1a reaches the mandrel 7, and interrupt the polishing.
なお巻取中にポリシャー8,9をかけると、前述の如くピ
ンチロール5,6の負荷が大きくなって問題となるが、も
う少しポリシャー8,9をかけた方が良い場合は、鋼帯先
端が巻取機に巻き付き後に上ピンチロール5を鋼帯1よ
り引上げ、その上昇位置で上ピンチロール5を駆動して
研磨すれば、上記問題点を伴なうことなくより完全に研
磨することが可能である。If the polishers 8 and 9 are applied during winding, the load on the pinch rolls 5 and 6 will increase, as described above, but this will cause a problem. If the upper pinch roll 5 is pulled up from the steel strip 1 after being wound around the winder and the upper pinch roll 5 is driven and polished at the elevated position, it is possible to perform more complete polishing without the above problems. Is.
以下本発明の施工例について説明する。Hereinafter, a construction example of the present invention will be described.
熱間圧延工場の仕上ホットストリップミル後段のダウン
コイラ式巻取機用ピンチロール(鍛鋼に硬化肉盛りした
ロール、上ロール920mmφ、下ロール460mmφ)に対し、
下記条件で本発明を実施した結果、疵発生率(コイル本
数比)は0.2%であった。For the finisher hot strip mill post-down coiler type winder pinch rolls (rolls hardened on forged steel, upper roll 920mmφ, lower roll 460mmφ)
As a result of carrying out the present invention under the following conditions, the defect occurrence rate (ratio of the number of coils) was 0.2%.
条件:ホットコイル数 1万個(約174,000トン) 弾性砥石ポリシャー押付面圧 1.6kg/cm2 研磨時間 0.5秒/1コイル これに対して従来の圧延と圧延の合間に研磨したもの
は、上記とほぼ同じ条件で2%の疵発生率であった。従
って本発明により1.8%の疵発生率減少となっているこ
とがわかる。Conditions: 10,000 hot coils (174,000 tons) Elastic grindstone Polisher pressing surface pressure 1.6 kg / cm 2 Polishing time 0.5 sec / coil On the other hand, the one polished between the conventional rolling and The defect occurrence rate was 2% under almost the same conditions. Therefore, it can be seen that the present invention reduces the defect occurrence rate by 1.8%.
本発明によると、ピンチロール疵の発生後ただちに疵除
去できるので、被圧延鋼帯にピンチロール疵を転写させ
ず、生産歩留を向上させる効果がある。According to the present invention, since the flaw can be removed immediately after the occurrence of the pinch roll flaw, there is an effect that the pinch roll flaw is not transferred to the rolled steel strip and the production yield is improved.
第1図(a),(b)は本発明の実施例を説明する概略
側面図、 第2図はホットストリップミル、ピンチロール及び巻取
機の位置関係を示す概略側面図、 第3図はピンチロールとピンチロールポリシャーの説明
図、 第4図(a),(b)はピンチロール疵の発生状況を説
明する側面図である。 1……圧延材(鋼帯)、2……仕上圧延機、3……ラン
アウトテーブル、4……サイドガイド、5,6……ピンチ
ロール、7……マンドレル、8,9……ポリシャー、10…
…案内ガイド、11……ピンチロールきず、12……鋼帯先
端カエリ、13……押し込みきず1 (a) and 1 (b) are schematic side views for explaining an embodiment of the present invention, FIG. 2 is a schematic side view showing the positional relationship between a hot strip mill, a pinch roll and a winder, and FIG. An explanatory view of the pinch roll and the pinch roll polisher, and FIGS. 4 (a) and 4 (b) are side views for explaining the occurrence state of the pinch roll flaw. 1 ... Rolled material (steel strip), 2 ... Finishing rolling mill, 3 ... Runout table, 4 ... Side guide, 5,6 ... Pinch roll, 7 ... Mandrel, 8,9 ... Pollisher, 10 …
… Guidance guide, 11 …… Pinch roll flaw, 12 …… Steel strip burrs, 13 …… Pushing flaw
Claims (1)
た鋼帯の先端が巻取機用ピンチロールに噛み込み直後も
しくは直前からピンチロールを通過し巻取機に到達する
まで、ピンチロールに搭載したポリッシャーによりピン
チロールの研磨を行うことを特徴とする熱延鋼帯巻取機
用ピンチロールの研磨方法。1. In hot rolling of a steel strip, until the tip of the steel strip exiting the finish rolling mill bites into a pinch roll for a winder or immediately before it reaches the winder after passing through the pinch roll. A method for polishing a pinch roll for a hot-rolled steel strip winder, which comprises polishing the pinch roll with a polisher mounted on the pinch roll.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15021787A JPH07121403B2 (en) | 1987-06-18 | 1987-06-18 | Method for polishing pinch roll for hot rolled steel strip winder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15021787A JPH07121403B2 (en) | 1987-06-18 | 1987-06-18 | Method for polishing pinch roll for hot rolled steel strip winder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63317207A JPS63317207A (en) | 1988-12-26 |
JPH07121403B2 true JPH07121403B2 (en) | 1995-12-25 |
Family
ID=15492097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15021787A Expired - Lifetime JPH07121403B2 (en) | 1987-06-18 | 1987-06-18 | Method for polishing pinch roll for hot rolled steel strip winder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07121403B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4913536B2 (en) * | 2006-10-20 | 2012-04-11 | 新日本製鐵株式会社 | Roll for hot rolling winding equipment and adjustment method thereof |
-
1987
- 1987-06-18 JP JP15021787A patent/JPH07121403B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS63317207A (en) | 1988-12-26 |
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