JP4505231B2 - Lubricating oil supply method in cold rolling - Google Patents

Lubricating oil supply method in cold rolling Download PDF

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JP4505231B2
JP4505231B2 JP2004012678A JP2004012678A JP4505231B2 JP 4505231 B2 JP4505231 B2 JP 4505231B2 JP 2004012678 A JP2004012678 A JP 2004012678A JP 2004012678 A JP2004012678 A JP 2004012678A JP 4505231 B2 JP4505231 B2 JP 4505231B2
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lubricating oil
rolling mill
film thickness
roll
cooling water
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JP2005205432A (en
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義久 高濱
利幸 白石
茂 小川
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Nippon Steel Corp
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本発明は冷間圧延における潤滑油供給方法、特に潤滑油原液をワークロールに供給するニート潤滑方式による潤滑油供給方法に関する。   The present invention relates to a lubricating oil supply method in cold rolling, and more particularly to a neat lubrication method for supplying a lubricating oil stock solution to a work roll.

冷間圧延では、ステンレス鋼板を除いて通常エマルション潤滑が用いられている。しかし、エマルション潤滑ではむだになる潤滑油が多く、また圧延速度が高速になると潤滑不足を生じて焼付き疵を生じる場合がある。   In cold rolling, emulsion lubrication is usually used except for stainless steel plates. However, many lubricant oils are wasted by emulsion lubrication, and when the rolling speed is increased, insufficient lubrication may occur and seizure may occur.

上記エマルション潤滑の問題を解決する技術として、潤滑油原液(以下、単に潤滑油という)をロールおよび/または鋼板に供給するニート潤滑がある。ニート潤滑は摩擦を低減する有効な手段であるが、従来の潤滑油供給方法では、潤滑油原液をノズルから供給するので次のような問題があった。   As a technique for solving the problem of emulsion lubrication, there is neat lubrication in which a lubricating oil stock solution (hereinafter simply referred to as lubricating oil) is supplied to a roll and / or a steel plate. Although neat lubrication is an effective means for reducing friction, the conventional lubricating oil supply method has the following problems because the lubricating oil stock solution is supplied from the nozzle.

(1)潤滑過多を生じてスリップを起こし、疵を生じる場合がある。(2)潤滑油供給量を減少し過ぎると、潤滑油はエマルションより粘度が高いためにロールや板の全体に広がらず、供給されない部分で焼付き疵を生じる場合がある(幅方向不均一)。(3)板端やロール端からこぼれ落ちる潤滑油が現状より増加し、特にダイレクト潤滑では歩留りが悪化する。(4)リサーキュレーション潤滑ではダイレクト潤滑ほど歩留りの悪化はないものの、粘度が高く不純物を内包しやすいので再使用するための不純物の除去等が難しい。   (1) Excessive lubrication may cause slipping and wrinkles. (2) If the lubricating oil supply amount is reduced too much, the lubricating oil has a higher viscosity than the emulsion, so it does not spread over the entire roll or plate, and may cause seizure flaws in the parts where it is not supplied (non-uniform in the width direction). . (3) Lubricating oil spilling from the plate end and roll end is increased from the current level, and the yield is deteriorated particularly in direct lubrication. (4) In recirculation lubrication, although yield does not deteriorate as much as direct lubrication, it is difficult to remove impurities for reuse because of its high viscosity and easy inclusion of impurities.

上記ニート潤滑の問題を解決する技術として、鋼板の圧延用ワークロールの潤滑油供給装置であって、ワークロールに5mm以下の間隙で近接して潤滑油を供給する吐出口を設けた潤滑油供給装置がある。この装置では、吐出口の網状組織の細孔から潤滑油を滲み出させてワークロールに供給する。潤滑油供給量は、潤滑油に加わる圧力を調整して制御する。(例えば、特許文献1参照)。
特開2001−179313号公報(第4頁、第5頁、図1および 図4)
As a technique for solving the above-mentioned neat lubrication problem, a lubricating oil supply device for a work roll for rolling steel sheets, which is provided with a discharge port for supplying lubricating oil close to the work roll with a gap of 5 mm or less. There is a device. In this apparatus, lubricating oil is oozed out from the pores of the network structure of the discharge port and supplied to the work roll. The amount of lubricating oil supplied is controlled by adjusting the pressure applied to the lubricating oil. (For example, refer to Patent Document 1).
JP 2001-179313 A (4th page, 5th page, FIG. 1 and FIG. 4)

上記従来の圧延ロールのニート潤滑方法は、摩擦係数低減には有効である。しかし、潤滑油を細孔から滲み出させ、潤滑油に加わる圧力を調整して潤滑油供給量を制御するので、制御の応答に遅れが生じることがあった。このために、焼付き疵が生じるおそれがあった。   The conventional method for neat lubrication of rolling rolls is effective in reducing the friction coefficient. However, since the lubricating oil oozes out from the pores and the pressure applied to the lubricating oil is adjusted to control the supply amount of the lubricating oil, the control response may be delayed. For this reason, there was a possibility that seizure flaws would occur.

この発明は、潤滑油供給制御の応答性に優れ、焼付き疵のない高品質の製品を製造することができる冷間圧延における潤滑油供給方法を提供するものである。   The present invention provides a lubricating oil supply method in cold rolling that can produce a high-quality product that is excellent in responsiveness of the lubricating oil supply control and has no seizure flaws.

この発明の冷間圧延における潤滑油供給方法は、潤滑油原液をロールバイト入側に供給する冷間圧延における潤滑油供給方法において、圧延機のロール周速度と当該圧延機出側の板速度を測定して先進率を計算し、先進率が設定範囲内に入るように、潤滑油原液を潤滑油ノズルから圧縮気体で霧状に噴射してロールバイト入側に、空気流量を調整することによって潤滑油供給量を制御しながら供給し、前記圧延機出側で少なくともワークロールに冷却水を供給し、ワークロール出側のロール面および/または圧延機出側の金属板面に付着した冷却水を水切り装置で除去する。ここで、潤滑油原液は、鉱油、油脂または合成潤滑油からなり、酸化防止剤、油性向上剤などの添加剤が添加されたものも含む。 The lubricating oil supply method in cold rolling according to the present invention is a lubricating oil supply method in cold rolling in which a lubricating oil stock solution is supplied to the roll bite inlet side, and the roll peripheral speed of the rolling mill and the plate speed on the outlet side of the rolling mill are By measuring and calculating the advance rate , by adjusting the air flow rate to the roll bite entry side by injecting the lubricant oil stock in a mist with compressed gas from the lubricant nozzle so that the advance rate falls within the set range supplied while controlling the lubricating oil supply amount, the supplied cooling water to at least the work rolls at the delivery side of the rolling mill, cooling water adhering to the roll surface and / or the metal plate surface on the delivery side of the rolling mill work roll exit side Is removed with a drainer. Here, the lubricating oil stock solution is made of mineral oil, fat or synthetic lubricating oil, and includes those to which additives such as antioxidants and oiliness improvers are added.

また、この発明の冷間圧延における潤滑油供給方法は、潤滑油原液をロールバイト入側に供給する冷間圧延における潤滑油供給方法において、油膜厚計で圧延機出側の油膜厚を測定し、測定油膜厚が目標値に一致するように潤滑油原液を潤滑油ノズルから圧縮気体で霧状に噴射してロールバイト入側に、空気流量を調整することによって潤滑油供給量を制御しながら供給し、前記圧延機出側で少なくともワークロールに冷却水を供給し、ワークロール出側のロール面および/または圧延機出側の金属板面に付着した冷却水を水切り装置で除去する。 The lubricating oil supply method in cold rolling according to the present invention is a lubricating oil supply method in cold rolling in which a lubricating oil stock solution is supplied to the roll bite inlet side, and the oil film thickness is measured with an oil film thickness meter. While controlling the lubricating oil supply amount by adjusting the air flow rate to the roll bite inlet side by injecting the lubricating oil stock solution in a mist with compressed gas from the lubricating oil nozzle so that the measured oil film thickness matches the target value Then, cooling water is supplied to at least the work roll on the outlet side of the rolling mill, and the cooling water adhering to the roll surface on the outlet side of the work roll and / or the metal plate surface on the outlet side of the rolling mill is removed by a draining device.

上記油膜厚の測定値に基づいて潤滑油供給制御を行なう場合、圧延機出側に油膜厚計を金属板上下面に設置し、測定油膜厚が目標値に一致するように当該圧延機入側の潤滑油供給量を上下別々に制御するようにしてもよく、また複数の潤滑油ノズルを板幅方向に沿って設置するとともに、圧延機出側に複数の油膜厚計を板幅方向に沿って設置し、それぞれの箇所の測定油膜厚が目標値に一致するように当該圧延機入側の潤滑油供給量をそれぞれ制御するようにしてもよい。   When lubricating oil supply control is performed based on the measured value of the oil film thickness, an oil film thickness meter is installed on the upper and lower surfaces of the metal plate at the rolling mill outlet side, and the rolling mill inlet side is set so that the measured oil film thickness matches the target value. The lubricating oil supply amount may be controlled separately up and down, and a plurality of lubricating oil nozzles are installed along the plate width direction, and a plurality of oil film thickness meters are arranged along the plate width direction on the rolling mill exit side. The lubricating oil supply amount on the rolling mill entry side may be controlled so that the measured oil film thickness at each location matches the target value.

この発明では、潤滑油原液を潤滑油ノズルから圧縮気体で霧状に噴射してロールバイト入側に供給する。潤滑油供給量は圧縮気体の流量により制御することができるので、潤滑油供給制御の高い応答性と精度が得られる。この結果、潤滑不足による焼付き疵の発生を防ぎ高品質の製品を製造することが可能で、さらに潤滑油の節減を図ることができる。   In this invention, the lubricating oil stock solution is sprayed from the lubricating oil nozzle in the form of a mist with compressed gas and supplied to the roll bite inlet side. Since the lubricating oil supply amount can be controlled by the flow rate of the compressed gas, high responsiveness and accuracy of the lubricating oil supply control can be obtained. As a result, it is possible to prevent the occurrence of seizure flaws due to insufficient lubrication and to manufacture a high-quality product, and to further reduce the lubricating oil.

また、ワークロール出側のロール面および/または圧延機出側の金属板面に付着した冷却水を水切り装置で除去する。ワークロール出側のロール面に付着した冷却水を除去する場合、潤滑油を金属板表面に十分に付着させることができる。圧延機出側の金属板面に付着した冷却水を除去する場合、油膜厚計を設置して油膜厚を測定することが可能となる。油膜厚の測定値に基づき油膜厚をフィードバック制御することにより、更に高精度で所要の油膜厚を得ることができる。さらに、水切り装置として水切り板を用いることにより、ミストおよび冷却水の飛散を防ぎ、良好な作業および設備環境を保つことができる。   Moreover, the cooling water adhering to the roll surface on the work roll exit side and / or the metal plate surface on the exit side of the rolling mill is removed by a draining device. When removing the cooling water adhering to the roll surface on the work roll exit side, the lubricating oil can be sufficiently adhered to the surface of the metal plate. When removing the cooling water adhering to the metal plate surface on the rolling mill exit side, an oil film thickness meter can be installed to measure the oil film thickness. By performing feedback control of the oil film thickness based on the measured value of the oil film thickness, the required oil film thickness can be obtained with higher accuracy. Furthermore, by using a draining plate as the draining device, it is possible to prevent scattering of mist and cooling water and maintain a good work and equipment environment.

本発明の第1の実施の形態は、常温で液状の潤滑油(潤滑油原液)を水と混合せずに圧縮空気を用いて噴霧状態でロールバイト入側で潤滑油を供給するとともに、ワークロール出側に冷却水を供給する。そして、ワークロール出側に配置した水切り板により、ワークロールの出側表面に付着した冷却水を水切り板で除去する。   In the first embodiment of the present invention, lubricating oil is supplied on the roll bite entry side in a sprayed state using compressed air without mixing liquid lubricating oil (lubricating oil stock solution) with water at room temperature, Supply cooling water to the roll exit side. And the cooling water adhering to the exit side surface of a work roll is removed with a draining board with the draining board arrange | positioned at the work roll exit side.

図1は、上記潤滑油供給方法を実施する冷間圧延機の一例を示している。以下、金属板が鋼板であるとして説明する。圧延機10は、ワークロール12およびバックアップロール14を備えた4段圧延機である。この圧延機10において、潤滑油が潤滑油タンク30から潤滑油ポンプ34により配管32を経て潤滑油ヘッダー20に送られる。潤滑油は、潤滑油ヘッダー20からこれにロール軸方向に沿って配置された複数の潤滑油ノズル22に流入する。一方、圧縮空気タンク40から乾燥した圧縮空気が配管42を経て潤滑油ノズル22に供給される。潤滑油は圧縮空気と混合されて潤滑油ノズル22から噴出し、霧吹き状となってワークロール12と鋼板1に供給される。ニート潤滑であるので効果的に摩擦係数を減少させることができる。潤滑油圧力調節弁36で潤滑油圧力を一定に保持し、空気流量調節弁46で空気流量を調整して潤滑油供給量を制御する。   FIG. 1 shows an example of a cold rolling mill that implements the lubricating oil supply method. Hereinafter, description will be made assuming that the metal plate is a steel plate. The rolling mill 10 is a four-high rolling mill provided with a work roll 12 and a backup roll 14. In the rolling mill 10, the lubricating oil is sent from the lubricating oil tank 30 to the lubricating oil header 20 via the piping 32 by the lubricating oil pump 34. Lubricating oil flows from the lubricating oil header 20 into a plurality of lubricating oil nozzles 22 arranged along the roll axis direction. On the other hand, the dried compressed air from the compressed air tank 40 is supplied to the lubricating oil nozzle 22 through the pipe 42. The lubricating oil is mixed with the compressed air and ejected from the lubricating oil nozzle 22 to be sprayed and supplied to the work roll 12 and the steel plate 1. Since it is neat lubrication, the friction coefficient can be effectively reduced. The lubricant pressure is kept constant by the lubricant pressure control valve 36, and the air flow rate is adjusted by the air flow rate control valve 46 to control the lubricant supply amount.

エマルション潤滑では、水の熱伝導率が高いために十分な冷却効果が得られるが、エアアトマイズ法では十分な冷却効果が期待できない。焼付きを防ぐために、圧延機出側から冷却水をワークロール12に散布する。したがって、この実施の形態では、圧延機10のワークロール出側に複数の冷却水ノズル26をロール軸方向に沿って配置し、ワークロール12を水冷するようにしている。冷却水は、冷却水タンク50から配管52を経て冷却水ヘッダー24に冷却水ポンプ54で送られる。冷却水はロール軸方向に沿って冷却水ヘッダー24に取り付けられた複数の冷却水ノズル26からワークロール12の出側表面に散布され、ワークロール12を冷却する。冷却水量は冷却水流量調節弁56で調整する。 In emulsion lubrication, a sufficient cooling effect can be obtained due to the high thermal conductivity of water, but a sufficient cooling effect cannot be expected with the air atomization method. In order to prevent seizure, cooling water is sprayed on the work roll 12 from the rolling mill exit side. Therefore, in this embodiment, a plurality of cooling water nozzles 26 are arranged along the roll axis direction on the work roll exit side of the rolling mill 10 to cool the work roll 12 with water. The cooling water is sent from the cooling water tank 50 through the piping 52 to the cooling water header 24 by the cooling water pump 54. The cooling water is sprayed on the exit surface of the work roll 12 from a plurality of cooling water nozzles 26 attached to the cooling water header 24 along the roll axis direction, thereby cooling the work roll 12. The amount of cooling water is adjusted by a cooling water flow rate adjustment valve 56.

飛散した冷却水がワークロール12の表面に付着すると、潤滑油の鋼板1への付着が妨げられるので、水切り板28をワークロール出側に近接して設けている。水切り板28は、ロール回転方向に関して冷却水ノズル26の下流側に位置している。ワークロール表面と水切り板28の先端面との間の間隙は、0〜5mm程度である。したがって、水切り板28は飛散する冷却水のワークロール12へ付着を防ぎ、潤滑油の鋼板1への付着を確実にする。また、水切り板28は冷却水およびヒュームの圧延機周辺への飛散を防ぎ、良好な作業および設備環境を保つ。なお、水切り板28が柔らかい材料、例えばプラスチックで作製されている場合、ワークロール表面と水切り板28の先端とが接触(間隙が0mm)していてもよい。   When the scattered cooling water adheres to the surface of the work roll 12, adhesion of the lubricating oil to the steel plate 1 is hindered, so the draining plate 28 is provided close to the work roll exit side. The draining plate 28 is located on the downstream side of the cooling water nozzle 26 in the roll rotation direction. The gap between the work roll surface and the tip surface of the draining plate 28 is about 0 to 5 mm. Therefore, the draining plate 28 prevents the scattered cooling water from adhering to the work roll 12 and ensures that the lubricating oil adheres to the steel plate 1. Further, the draining plate 28 prevents cooling water and fume from being scattered around the rolling mill and maintains a good work and equipment environment. When the draining plate 28 is made of a soft material such as plastic, the work roll surface and the tip of the draining plate 28 may be in contact with each other (gap is 0 mm).

潤滑油供給量の制御は、摩擦係数と密接な関係がある先進率に基づいて行なう。ワークロール周速がワークロール回転速度計(図示しない)で、また板速度が圧延機出側の板速度計62でそれぞれ測定される。これらの測定結果は潤滑油供給制御装置60に送られ、先進率が計算される。潤滑油供給制御装置60は摩擦係数と先進率との関係に基づいて所要の潤滑油供給量を求め、空気流量調節弁46に操作信号を出力する。これにより、潤滑油供給量が制御され、油膜は所要の厚さに維持される。   Control of the amount of lubricating oil supplied is based on an advanced rate that is closely related to the coefficient of friction. The work roll peripheral speed is measured by a work roll rotational speed meter (not shown), and the plate speed is measured by a plate speed meter 62 on the delivery side of the rolling mill. These measurement results are sent to the lubricating oil supply control device 60, and the advance rate is calculated. The lubricating oil supply control device 60 obtains a required lubricating oil supply amount based on the relationship between the friction coefficient and the advanced rate, and outputs an operation signal to the air flow rate adjustment valve 46. As a result, the amount of lubricating oil supplied is controlled, and the oil film is maintained at a required thickness.

この発明の第2の実施の形態では、常温で液状の潤滑油を水と混合せずに圧縮空気を用いてロールバイト入側で潤滑油を噴霧状態で供給するとともに、ワークロール出側に冷却水を供給する。そして、圧延機出側に配置した水切り板により、鋼板表面に付着した冷却水を水切り板で除去する。   In the second embodiment of the present invention, lubricating oil is supplied in a sprayed state on the roll bite entry side using compressed air without mixing liquid lubricant at room temperature with water and cooled to the work roll exit side. Supply water. And the cooling water adhering to the steel plate surface is removed with a draining board with the draining board arrange | positioned at the rolling mill delivery side.

図2は、上記潤滑油供給方法を実施する圧延機の例を示している。図2において、図1に示す装置、部材と同様の装置、部材には同一の参照符号を付け、その詳細な説明は省略する。   FIG. 2 shows an example of a rolling mill that implements the lubricating oil supply method. In FIG. 2, devices and members similar to those shown in FIG. 1 are assigned the same reference numerals, and detailed descriptions thereof are omitted.

水切り板29が、圧延機10の出側に配置されている。鋼板1の表、裏面の油膜厚をそれぞれ測定する油膜厚計64、66が、水切り板29の下流側に設けられている。鋼板面と水切り板29の先端面との間の間隙は0〜5mm程度である。   A draining plate 29 is disposed on the exit side of the rolling mill 10. Oil film thickness gauges 64 and 66 for measuring the oil film thickness on the front and back surfaces of the steel plate 1 are provided on the downstream side of the draining plate 29. The gap between the steel plate surface and the tip surface of the draining plate 29 is about 0 to 5 mm.

水切り板29によって冷却水の鋼板表面へ付着した冷却水は除去され、ヒュームが圧延機周りに多量に飛散する状況にはならないので環境的な問題がほとんどなく、油膜厚計64、66の設置が可能である。油膜厚計64、66として、例えば赤外線式油膜厚計を用いることができる。   The cooling water adhering to the surface of the cooling water is removed by the draining plate 29, and there is almost no environmental problem because the fume is not scattered in a large amount around the rolling mill. Is possible. As the oil film thickness meters 64 and 66, for example, an infrared type oil film thickness meter can be used.

エアアトマイズ法では、少なくとも潤滑過多によるスリップの発生や供給むらを生じることはない。供給した潤滑油はロールバイト入口で油溜まりを形成し、その後は供給した分がすべてロールバイト内に導入されるとみなされるので、出側の油膜厚計は必須ではない。しかし、通常操業では様々な外乱が生じているので、必要最小量の潤滑油を供給するためには油膜厚計によるフィードバック制御を行うことが望ましい。   In the air atomization method, at least slip generation or supply unevenness due to excessive lubrication does not occur. The supplied lubricating oil forms an oil reservoir at the roll bite inlet, and thereafter, it is considered that all of the supplied amount is introduced into the roll bite, and therefore the oil film thickness meter on the outlet side is not essential. However, since various disturbances occur in normal operation, it is desirable to perform feedback control using an oil film thickness meter in order to supply the minimum amount of lubricating oil.

上記フィードバック制御では、目標油膜厚は過去の操業実績から当該圧延条件において焼付きの生じない最小油膜厚を設定する。圧延機出側の油膜厚計64、66で測定された油膜厚は、潤滑油供給制御装置60に入力される。潤滑油供給制御装置60は目標油膜厚と実測油膜厚との差に基づき操作信号を圧縮空気流量調節弁46に出力する。圧縮空気流量の調整により潤滑油供給量が変化して、目標油膜厚が得られる。   In the feedback control, the target oil film thickness is set to the minimum oil film thickness that does not cause seizure under the rolling conditions from the past operation results. The oil film thickness measured by the oil film thickness meters 64 and 66 on the delivery side of the rolling mill is input to the lubricating oil supply control device 60. The lubricating oil supply control device 60 outputs an operation signal to the compressed air flow rate adjustment valve 46 based on the difference between the target oil film thickness and the actually measured oil film thickness. By adjusting the compressed air flow rate, the amount of lubricating oil supplied changes, and the target oil film thickness is obtained.

油膜厚計64、66を板幅方向に複数台設置すれば、板幅方向の油膜厚不均一を解消することが可能である。板幅方向の油膜厚分布を測定し、隣接する潤滑供給端からの重なりを考慮した上で潤滑油を供給することにより、油膜厚を板幅方向にも均一にすることができる。この場合、圧縮空気タンク40と潤滑油ノズル22とを結ぶ配管42ごとに圧縮空気流量調節弁46を設けて各潤滑油ノズルごとに圧縮空気流量を調整する。また逆に、板幅方向の潤滑油供給量を変化させることにより中伸びや端伸びを意図的に作り出すこともできる。特に高張力圧延を行う場合、板端の微小クラック起因の板破断を回避するために端伸び気味に圧延する場合があるが、この実施の形態はそのためにも有効である。   If a plurality of oil film thickness meters 64 and 66 are installed in the plate width direction, it is possible to eliminate uneven oil film thickness in the plate width direction. By measuring the oil film thickness distribution in the plate width direction and supplying the lubricating oil in consideration of the overlap from the adjacent lubrication supply ends, the oil film thickness can be made uniform in the plate width direction. In this case, a compressed air flow rate adjusting valve 46 is provided for each pipe 42 connecting the compressed air tank 40 and the lubricating oil nozzle 22 to adjust the compressed air flow rate for each lubricating oil nozzle. Conversely, it is also possible to intentionally create medium elongation and end elongation by changing the amount of lubricating oil supplied in the plate width direction. In particular, when high-tensile rolling is performed, rolling may be performed in an end-elongated manner in order to avoid plate breakage due to minute cracks at the plate end, but this embodiment is also effective for this purpose.

この発明は上記実施の形態に限られるものではない。例えば、水切り装置として水切り板以外に圧縮空気などの不燃焼性圧縮気体をワークロール面および/または金属板面に噴射する噴射装置であってもよい。第2の実施の形態でワークロールの出側にも水切り板を設けてもよい。この場合、更に確実に所要の厚みの油膜を金属板表面に形成することができる。油膜厚計は、金属板の上、下面のいずれか一方に配置してもよい。潤滑油ノズルに供給する圧縮気体は、空気のほかに窒素ガスなどの不燃焼気体であってもよい。ロールバイトから圧延機上流側に距離をおいて、潤滑油ノズルを配置してもよい。圧延材は鋼のほかにチタン、アルミニウム、マグネシウム、銅などの金属およびこれら各金属の合金であってもよい。   The present invention is not limited to the above embodiment. For example, a spraying device that sprays non-combustible compressed gas such as compressed air onto the work roll surface and / or the metal plate surface in addition to the draining plate may be used as the draining device. In the second embodiment, a draining plate may be provided on the exit side of the work roll. In this case, an oil film having a required thickness can be more reliably formed on the surface of the metal plate. The oil film thickness meter may be disposed on either the upper or lower surface of the metal plate. The compressed gas supplied to the lubricating oil nozzle may be non-combustible gas such as nitrogen gas in addition to air. Lubricating oil nozzles may be arranged at a distance from the roll tool to the upstream side of the rolling mill. In addition to steel, the rolled material may be a metal such as titanium, aluminum, magnesium, copper, or an alloy of these metals.

単スタンド4Hiの実験ミルを用いてコイル圧延を実施した。エアアトマイズ法で鋼板上、下面にそれぞれ油膜厚計を1台ずつ設置して圧延を行った。ワークロールには冷部水を供給した。あらかじめエアアトマイズ法で1200m/minの圧延速度にしたのち、供給量を減少させていく実験を行い、必要最小油膜厚を求めておいた。実験では速度を増加させて1200m/minになったところで定常圧延に入り、当該条件で20分圧延を行ったのち、減速して実験を終了した。圧延後にコイルを確認したが、焼付き疵の発生は見られなかった。   Coil rolling was performed using a single stand 4Hi experimental mill. Rolling was carried out by installing one oil film thickness meter on each of the upper and lower surfaces of the steel sheet by the air atomization method. Cold water was supplied to the work roll. The minimum required oil film thickness was obtained by conducting an experiment in which the supply rate was decreased after a rolling speed of 1200 m / min in advance by the air atomization method. In the experiment, when the speed was increased to 1200 m / min, steady rolling was started, rolling was performed for 20 minutes under the above conditions, and then the experiment was terminated with the speed reduced. Although the coil was confirmed after rolling, the occurrence of seizure flaws was not observed.

つぎに、3%濃度のエマルション潤滑で圧延した。濃度は先にエアアトマイズ法で求めた最小油量をエマルションの場合に換算して決定し、供給量を上、下片側10L/minと一定にした。圧延後コイルを巻き解いたところ、定常部圧延開始後約17分以降で焼付きが生じていることが確認され、エアアトマイズ法の有効性が確認された。   Next, it was rolled with 3% concentration emulsion lubrication. The concentration was determined by converting the minimum oil amount previously obtained by the air atomization method into the case of an emulsion, and the supply amount was made constant at 10 L / min on the upper and lower sides. When the coil was unwound after rolling, it was confirmed that seizure had occurred about 17 minutes after the start of steady-state rolling, and the effectiveness of the air atomization method was confirmed.

この発明の第1の実施の形態であって、この発明の潤滑油供給方法を実施する圧延機の模式的構成図である。It is 1st Embodiment of this invention, Comprising: It is a typical block diagram of the rolling mill which implements the lubricating oil supply method of this invention. この発明の第1の実施の形態であって、この発明の潤滑油供給方法を実施する圧延機の模式的構成図である。It is 1st Embodiment of this invention, Comprising: It is a typical block diagram of the rolling mill which implements the lubricating oil supply method of this invention.

符号の説明Explanation of symbols

1 金属板(鋼板) 10 圧延機
12 ワークロール 14 バックアップロール
20 潤滑油ヘッダー 22 潤滑油ノズル
24 冷却水ヘッダー 26 冷却水ノズル
28、29 水切り板 30 潤滑油タンク
34 潤滑油ポンプ 36 潤滑油圧力調節弁
40 圧縮空気タンク 46 空気流量調節弁
50 冷却水タンク 54 冷却水ポンプ
56 冷却水流量調節弁 60 潤滑油供給制御装置
62 板速度計 64、66 油膜厚計
DESCRIPTION OF SYMBOLS 1 Metal plate (steel plate) 10 Rolling machine 12 Work roll 14 Backup roll 20 Lubricating oil header 22 Lubricating oil nozzle 24 Cooling water header 26 Cooling water nozzle 28, 29 Drain plate 30 Lubricating oil tank 34 Lubricating oil pump 36 Lubricating oil pressure control valve 40 Compressed Air Tank 46 Air Flow Control Valve 50 Cooling Water Tank 54 Cooling Water Pump 56 Cooling Water Flow Control Valve 60 Lubricating Oil Supply Control Device 62 Plate Speedometer 64, 66 Oil Film Thickness Meter

Claims (4)

潤滑油原液をロールバイト入側に供給する冷間圧延における潤滑油供給方法において、
圧延機のロール周速度と当該圧延機出側の板速度を測定して先進率を計算し、先進率が設定範囲内に入るように、潤滑油原液を潤滑油ノズルから圧縮気体で霧状に噴射してロールバイト入側に、空気流量を調整することによって潤滑油供給量を制御しながら供給し、
前記圧延機出側で少なくともワークロールに冷却水を供給し、ワークロール出側のロール面および/または圧延機出側の金属板面に付着した冷却水を水切り装置で除去することを特徴とする冷間圧延における潤滑油供給方法。
In the lubricating oil supply method in cold rolling to supply the lubricating oil stock solution to the roll bite entry side,
Measure the roll peripheral speed of the rolling mill and the sheet speed on the delivery side of the rolling mill to calculate the advanced rate , and spray the lubricant stock solution from the lubricating oil nozzle with a compressed gas so that the advanced rate falls within the set range. Suppose while controlling the lubricating oil supply by jetting and adjusting the air flow rate to the roll bite entry side,
Wherein supplying at least the cooling water to the work rolls at the delivery side of the rolling mill, and removing the cooling water adhering to the roll surface and / or the metal plate surface on the delivery side of the rolling mill work roll exit side draining device Lubricating oil supply method in cold rolling.
潤滑油原液をロールバイト入側に供給する冷間圧延における潤滑油供給方法において、
油膜厚計で圧延機出側の油膜厚を測定し、測定油膜厚が目標値に一致するように潤滑油原液を潤滑油ノズルから圧縮気体で霧状に噴射してロールバイト入側に、空気流量を調整することによって潤滑油供給量を制御しながら供給し、前記圧延機出側で少なくともワークロールに冷却水を供給し、ワークロール出側のロール面および/または圧延機出側の金属板面に付着した冷却水を水切り装置で除去することを特徴とする冷間圧延における潤滑油供給方法。
In the lubricating oil supply method in cold rolling to supply the lubricating oil stock solution to the roll bite entry side,
Measure the oil film thickness on the exit side of the rolling mill with an oil film thickness meter, and spray the lubricating oil stock solution in a mist with compressed gas from the lubricating oil nozzle so that the measured oil film thickness matches the target value. flow rate supplied while controlling the lubricating oil supply amount by adjusting the supplying cooling water to at least the work rolls at the delivery side of the rolling mill, the roll surface of the work roll exit side and / or delivery side of the rolling mill of the metal plate A cooling oil supply method in cold rolling, wherein cooling water adhering to the surface is removed by a draining device.
圧延機出側に油膜厚計を金属板上下面に設置し、測定油膜厚が目標値に一致するように当該圧延機入側の潤滑油供給量を上下別々に制御することを特徴とする請求項2に記載の冷間圧延における潤滑油供給方法。 Claims an oil film thickness meter the delivery side of the rolling mill placed in the metal plate the upper and lower surfaces, measured oil film thickness, characterized in that vertically separately control the lubricating oil supply amount of the rolling mill inlet side to match the target value Item 3. A method for supplying lubricating oil in cold rolling according to Item 2 . 複数の潤滑油ノズルを板幅方向に沿って設置するとともに、圧延機出側に複数の油膜厚計を板幅方向に沿って設置し、それぞれの箇所の測定油膜厚が目標値に一致するように当該圧延機入側の潤滑油供給量をそれぞれ制御することを特徴とする請求項2または請求項3記載の冷間圧延における潤滑油供給方法。 Install multiple lubricant nozzles along the plate width direction, and install multiple oil film thickness meters along the plate width direction on the exit side of the rolling mill so that the measured oil film thickness at each location matches the target value. 4. The method for supplying lubricating oil in cold rolling according to claim 2 , wherein the amount of lubricating oil supplied to the rolling mill is controlled.
JP2004012678A 2004-01-21 2004-01-21 Lubricating oil supply method in cold rolling Expired - Fee Related JP4505231B2 (en)

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