JPH08155510A - Method for feeding cold rolling oil - Google Patents
Method for feeding cold rolling oilInfo
- Publication number
- JPH08155510A JPH08155510A JP6323804A JP32380494A JPH08155510A JP H08155510 A JPH08155510 A JP H08155510A JP 6323804 A JP6323804 A JP 6323804A JP 32380494 A JP32380494 A JP 32380494A JP H08155510 A JPH08155510 A JP H08155510A
- Authority
- JP
- Japan
- Prior art keywords
- concentration
- rolling oil
- rolling
- rolling mill
- tank
- 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
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Metal Rolling (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、最終圧延厚さの異な
る圧延を同一の冷間圧延機において行う際、各々の板厚
に適した圧延油濃度で供給するための圧延油の供給方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying a rolling oil for supplying a rolling oil having a concentration suitable for each plate thickness when rolling with different final rolling thicknesses is carried out in the same cold rolling mill. .
【０００２】[0002]
【従来の技術】冷間圧延においては、圧延中のワークロ
ールとストリップとの摩擦抵抗の減少のために、圧延潤
滑剤（以下圧延油という）が使用されるほか、塑性加工
熱のためロールならびにストリップの温度が上昇し、ス
トリップの形状を悪化させたり、ストリップ表面にヒー
トストリークなどの表面欠陥を発生させることから、ロ
ールならびにストリップを冷却するために、ロールクー
ラントをロールならびにストリップに供給する必要があ
る。冷間圧延での圧延油供給システムとしては、高濃度
（１０〜３０％）の圧延油エマルションを直接ストリッ
プに噴霧し、ロールの冷却は別のノズルから冷却水を吹
きつける直接給油方式と、潤滑と冷却の両機能をもった
低濃度の圧延油エマルションを多量に吹き付け、使用さ
れた圧延油エマルションを再びタンクに戻して繰り返し
使用する循環給油方式がある。2. Description of the Related Art In cold rolling, a rolling lubricant (hereinafter referred to as "rolling oil") is used in order to reduce frictional resistance between a work roll and a strip during rolling. Since the temperature of the strip rises, the shape of the strip deteriorates, and surface defects such as heat streaks occur on the strip surface, it is necessary to supply roll coolant to the roll and the strip in order to cool the roll and the strip. is there. As a rolling oil supply system in cold rolling, a high concentration (10 to 30%) rolling oil emulsion is directly sprayed on a strip, and a roll is cooled by spraying cooling water from another nozzle. There is a circulating oil supply method in which a large amount of a low-concentration rolling oil emulsion having both functions of cooling and cooling is sprayed, and the used rolling oil emulsion is returned to the tank again and repeatedly used.
【０００３】従来の最終圧延厚さの異なる薄鋼板の圧延
を同一の冷間圧延機で行う全ゲージ兼用ミルにおいて
は、鉱油ベースの圧延油と牛脂の２種類を使った２タン
クシステム、あるいはこれらの混合油もしくは牛脂を使
った１タンクシステム等が採用されてきた。２タンクシ
ステムの例としては、鉱油、モノエステル、ジエステル
の３ベースオイルにより調整された３種類の圧延油とデ
タージェント液とを最終圧延厚さに応じて使い分ける方
法（特公昭６３−６１０８３号公報）があり、厚物ミル
クリーンに使用されている。しかし、現状の連続焼鈍炉
等を用いたプロセスでは、積極的にミルクリーン圧延油
を使用する要求度が低下しており、さらに、使用圧延油
を切替える際に、使用圧延油の影響を小さくするためミ
ル洗浄を実施しなければならず、生産性を阻害するとい
う欠点を有している。また、最終スタンドにデタージェ
ントを使用すると、圧延油へのデタージェント液の混入
防止のために、最終スタンドと前段スタンド間にブロッ
クオフを実施しなければならず、改造のための費用が膨
大なものになる。In a conventional full-gauge mill for rolling thin steel sheets having different final rolling thicknesses by the same cold rolling mill, a two-tank system using two types of rolling oil based on mineral oil and beef tallow, or these A one-tank system using mixed oil or beef tallow has been adopted. As an example of a two-tank system, a method of selectively using three types of rolling oil prepared by three base oils of mineral oil, monoester, and diester and a detergent solution according to the final rolling thickness (Japanese Patent Publication No. 63-61083). It is used for thick mill clean. However, in the process using the current continuous annealing furnace, the demand for positively using mill clean rolling oil is decreasing, and further, when switching the rolling oil to be used, the influence of the rolling oil to be used is reduced. Therefore, mill cleaning must be carried out, which has a drawback of impairing productivity. Also, if a detergent is used for the final stand, block off must be performed between the final stand and the preceding stand to prevent the mixture of detergent liquid in the rolling oil, and the cost for remodeling is enormous. It becomes a thing.
【０００４】また、デタージェント液を用いず最終スタ
ンドに前方スタンドより高濃度圧延油を使用するような
ラインにおいては、タンク内の濃度を一定にするため定
期的なスキミングが必要となってくる。さらに、１タン
クシステムにおいては、最終仕上げ厚の変化が大きいロ
ットが繰返されると、圧延油濃度安定化のために投入す
る圧延油と、圧延油の排出回数が増大し、圧延油の損失
となって圧延油原単位が非常に悪化する傾向となる。こ
の問題を解決する方法としては、圧延機近傍に熱交換器
を設置し、この熱交換器により圧延油エマルションに温
度変化を与えて供給時にその圧延油エマルションの乳化
を不安定状態にして供給し、供給された圧延油エマルシ
ョンが循環タンクに帰還するまでの間に、他の熱交換器
により圧延油エマルションに温度変化を与えて圧延油エ
マルションの乳化を安定状態とする方法（特開昭５４−
６７５４５号公報）、各スタンドの入側、出側でクーラ
ントに濃度変化を与える方法（特公昭５８−２９１６８
号公報、特公昭５８−５７３１号公報）が提案されてい
る。Further, in a line in which a highly concentrated rolling oil is used for the final stand rather than the detergent solution, periodic skimming is required to keep the concentration in the tank constant. Furthermore, in a one-tank system, when a lot with a large change in final finish thickness is repeated, the rolling oil that is input to stabilize the rolling oil concentration and the number of rolling oil discharges increase, resulting in rolling oil loss. As a result, the rolling oil consumption rate tends to deteriorate significantly. As a method of solving this problem, a heat exchanger is installed in the vicinity of the rolling mill, and the temperature of the rolling oil emulsion is changed by this heat exchanger to make the emulsification of the rolling oil emulsion unstable during the feeding. A method for stabilizing the emulsification of the rolling oil emulsion by giving a temperature change to the rolling oil emulsion by another heat exchanger until the supplied rolling oil emulsion returns to the circulation tank (JP-A-54-
No. 67545), a method of changing the concentration of the coolant on the inlet side and the outlet side of each stand (JP-B-58-29168).
Japanese Patent Publication No. 58-5731).
【０００５】[0005]
【発明が解決しようとする課題】上記特開昭５４−６７
５４５号公報に開示の方法は、供給された不安定状態の
乳化を安定させるには、熱交換器による温度変化の付与
だけでなく、圧延油の乳化安定性を向上させる必要があ
り、圧延油変更時のトラブルは避けられないものと考え
られる。また、特公昭５８−２９１６８号公報、特公昭
５８−５７３１号公報に開示の方法は、回収段階におい
て濃度差によるスキミングの実施が必要となり、圧延油
原単位が悪化するという欠点を有している。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
According to the method disclosed in Japanese Patent No. 545, in order to stabilize the supplied emulsification in an unstable state, it is necessary to improve the emulsification stability of rolling oil as well as to impart a temperature change by a heat exchanger. It is thought that the trouble at the time of change is inevitable. Further, the methods disclosed in Japanese Patent Publication No. 58-29168 and Japanese Patent Publication No. 58-5731 have the drawback that skimming due to the difference in concentration is required at the recovery stage, and the rolling oil unit consumption deteriorates. .
【０００６】この発明の目的は、上記従来技術の問題点
を解消し、圧延油原単位を悪化させることなく、最終圧
延厚さに対応して最適な圧延油濃度を設定できる冷間圧
延油の供給方法を提供することにある。The object of the present invention is to solve the above-mentioned problems of the prior art and to provide a cold rolling oil which can set an optimum rolling oil concentration corresponding to the final rolling thickness without deteriorating the rolling oil consumption rate. It is to provide a supply method.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、上記目的
を達成すべく種々試験研究を重ねた。その結果、薄物用
に使用する高濃度の圧延油タンクと、厚物用に使用する
低濃度の圧延油タンクとを設け、薄物および厚物圧延中
はそれぞれ単独の圧延油タンクから圧延油エマルション
を供給して回収し、かつ、中間物の場合には各圧延油タ
ンクから圧延油エマルションを流量調整して適正な所定
濃度に調整し、所定濃度に達すると低濃度圧延油タンク
へ循環させ、圧延油濃度の上昇した低濃度圧延油タンク
は、厚物用圧延中に給水して濃度調整を行うことによっ
て、圧延油原単位を悪化させることなく、最終圧延厚さ
に対応して最適な圧延油濃度を設定できることを確認
し、この発明に到達した。[Means for Solving the Problems] The present inventors have conducted various test studies in order to achieve the above object. As a result, a high-concentration rolling oil tank used for thin products and a low-concentration rolling oil tank used for thick products are provided, and a rolling oil emulsion from a single rolling oil tank is used during thin and thick rolling. Supply and collect, and in the case of an intermediate product, adjust the flow rate of the rolling oil emulsion from each rolling oil tank to adjust it to an appropriate predetermined concentration, and when it reaches the predetermined concentration, circulate it to the low-concentration rolling oil tank and roll it. The low-concentration rolling oil tank with an increased oil concentration is supplied with water during thick rolling to adjust the concentration, so that the optimum rolling oil corresponding to the final rolling thickness can be obtained without deteriorating the rolling oil consumption rate. It was confirmed that the concentration can be set, and the present invention was reached.
【０００８】すなわちこの発明は、仕上げ板厚の異なる
薄鋼板の圧延を同一の冷間圧延機において行う際の圧延
油エマルションを供給する方法において、高濃度と低濃
度の二つの圧延油タンクを設け、高濃度タンクと低濃度
タンクのそれぞれと圧延油供給ポンプを流量調整弁を介
して連結し、かつ、冷間圧延機に供給された圧延油エマ
ルションの戻り受皿と前記高濃度タンクおよび低濃度タ
ンクを開閉弁を介して連結し、仕上げ板厚に応じて薄物
ゲージは高濃度タンクより、厚物ゲージは低濃度タンク
より独立して圧延油エマルションを供給循環させ、中間
ゲージは高濃度タンクと低濃度タンクのそれぞれの流量
調整弁の開度を、吐出側に設けた自動濃度計の検出濃度
に応じて調整し、仕上げ板厚に応じて圧延油エマルショ
ンの濃度を調整すると共に、戻り受皿からの圧延油エマ
ルションの所定濃度以下を低濃度タンクへ流入させるこ
とを特徴とする冷間圧延油の供給方法である。That is, the present invention is a method of supplying a rolling oil emulsion when rolling thin steel sheets having different finish thicknesses in the same cold rolling mill, and is provided with two rolling oil tanks of high concentration and low concentration. A high-concentration tank and a low-concentration tank, respectively, and a rolling-oil supply pump connected through a flow control valve, and a return pan of the rolling-oil emulsion supplied to the cold rolling mill, the high-concentration tank, and the low-concentration tank. Depending on the finished plate thickness, the thin gauge gauge independently circulates the rolling oil emulsion from the high-concentration tank and the thick gauge gauge from the low-concentration tank. The opening of each flow rate adjustment valve of the concentration tank is adjusted according to the detected concentration of the automatic concentration meter installed on the discharge side, and the concentration of the rolling oil emulsion is adjusted according to the finished plate thickness. With a supply method of a cold-rolling oil for causing flow below a predetermined concentration of rolling oil emulsion from the return pan to low concentration tank.
【０００９】[0009]
【作用】この発明においては、高濃度と低濃度の二つの
圧延油タンクを設け、高濃度タンクと低濃度タンクのそ
れぞれと圧延油供給ポンプを流量調整弁を介して連結
し、かつ、冷間圧延機に供給された圧延油エマルション
の戻り受皿と前記高濃度タンクおよび低濃度タンクを開
閉弁を介して連結し、仕上げ板厚に応じて薄物ゲージは
高濃度タンクより、厚物ゲージは低濃度タンクより独立
して圧延油エマルションを供給循環させることによっ
て、高濃度から低濃度へは切替えのみで濃度調整でき、
濃度調整のための圧延油の投入や排出が皆無となり、圧
延油の原単位が低下する。また、この発明においては、
中間ゲージは高濃度タンクと低濃度タンクのそれぞれの
流量調整弁の開度を、吐出側に設けた自動濃度計の検出
濃度に応じて調整し、仕上げ板厚に応じて圧延油の濃度
を調整すると共に、戻り受皿からの圧延油エマルション
の所定濃度以下を低濃度タンクへ流入させることによっ
て、仕上げ板厚に応じて圧延油エマルションの濃度を適
正に設定することができ、安定した冷間圧延を行うこと
ができる。しかも、圧延油濃度の上昇した低濃度タンク
は、低濃度圧延油を供給して厚物圧延中に給水して濃度
調整することによって、圧延油の使用量を従来と比較し
て飛躍的に低減できる。In the present invention, two rolling oil tanks of high concentration and low concentration are provided, each of the high concentration tank and the low concentration tank is connected to the rolling oil supply pump through the flow rate adjusting valve, and cold rolling is performed. The return pan of the rolling oil emulsion supplied to the rolling mill is connected to the high-concentration tank and the low-concentration tank via an on-off valve. By circulating the rolling oil emulsion independently from the tank, the concentration can be adjusted simply by switching from high concentration to low concentration.
There is no input or discharge of rolling oil for concentration adjustment, and the unit consumption of rolling oil is reduced. Further, in the present invention,
The intermediate gauge adjusts the opening of each flow rate adjustment valve of the high concentration tank and the low concentration tank according to the detected concentration of the automatic concentration meter installed on the discharge side, and adjusts the concentration of rolling oil according to the finished plate thickness. In addition, by introducing a predetermined concentration or less of the rolling oil emulsion from the return pan into the low concentration tank, the concentration of the rolling oil emulsion can be set appropriately according to the finished plate thickness, and stable cold rolling can be performed. It can be carried out. Moreover, the low-concentration tank with increased rolling oil concentration drastically reduces the amount of rolling oil used by supplying low-concentration rolling oil and supplying water during thick rolling to adjust the concentration. it can.
【００１０】この発明方法を実施するうえでの操業上考
慮すべき点は、低濃度タンク容量の１／２までの圧延油
量で操業することである。何故ならば、回収圧延油エマ
ルションが増加すると低濃度タンクがオーバーフローす
るためで、低濃度タンク容量の１／２までの圧延油量で
操業すれば、１〜２週間の圧延サイクル後の低濃度タン
クの上層部を捨てて浮上異物を除去し、クーラントの純
度を向上させるスキミングで圧延油量の調整は可能であ
る。この発明における薄鋼板とは、仕上げ板厚０．１２
０ｍｍ〜２．３５０ｍｍのものをいい、その内で薄物と
は、板厚０．２２０ｍｍ以下、厚物とは板厚０．５００
ｍｍ以上を差し、この間を中間ゲージという。また、こ
の発明における圧延油エマルションの低濃度、高濃度と
は、例えば、厚物用の圧延油濃度１．０％のものを低濃
度、また、薄物用の圧延油濃度５．０％のものを高濃度
といい、厚物用と薄物用の中間を中間ゲージ用という。The point to be taken into consideration in carrying out the method of the present invention is to operate with a rolling oil amount up to 1/2 of the low concentration tank capacity. This is because the low-concentration tank overflows when the amount of recovered rolling oil emulsion increases, so if operating with a rolling oil amount up to 1/2 of the low-concentration tank capacity, the low-concentration tank after a rolling cycle of 1-2 weeks. The amount of rolling oil can be adjusted by discarding the upper layer part to remove floating foreign matter and skimming to improve the purity of the coolant. The thin steel plate in the present invention means a finished plate thickness of 0.12.
0 mm to 2.350 mm, in which thin is 0.220 mm or less and thick is 0.500.
Insert at least mm, and the space between them is called the intermediate gauge. Further, the low concentration and high concentration of the rolling oil emulsion in the present invention are, for example, those having a rolling oil concentration of 1.0% for a thick product and a low concentration of 5.0% for a thin product. Is called high concentration, and the middle for thick and thin is called intermediate gauge.
【００１１】この発明で用いる自動濃度計としては、導
電率式濃度計、半導体イオンセンサ、イオン電極等を用
いることができる。また、仕上げ板厚に応じて圧延油エ
マルションの濃度の調整は、吐出側に設けた自動濃度計
の検出濃度を圧延油制御部に入力し、予め設定された仕
上げ板厚に応じた圧延油濃度と比較演算し、検出濃度が
予め設定された圧延油濃度となるよう、高濃度タンクと
低濃度タンクのそれぞれの流量調整弁の開度を制御する
ことにより行うことができる。As the automatic densitometer used in the present invention, a conductivity type densitometer, a semiconductor ion sensor, an ion electrode or the like can be used. In addition, the concentration of the rolling oil emulsion is adjusted according to the finished plate thickness by inputting the detected concentration of the automatic densitometer installed on the discharge side to the rolling oil control unit, and the rolling oil concentration according to the preset finished plate thickness. Can be performed by controlling the opening of the flow rate adjusting valve of each of the high concentration tank and the low concentration tank so that the detected concentration becomes a preset rolling oil concentration.
【００１２】[0012]
実施例１ 以下にこの発明方法の詳細を実施の一例を示す図１に基
づいて説明する。図１はこの発明の冷間圧延油の供給シ
ステムの説明図である。図１において、１は圧延油濃度
５．０％の高濃度圧延油２を収容する高濃度タンク、３
は圧延油濃度１．０％の低濃度圧延油４を収容する低濃
度タンク、５は薄鋼板を圧延する冷間圧延ミル、６は冷
間圧延ミル５の各スタンドに圧延油エマルションを供給
するポンプで、高濃度タンク１および低濃度タンク３と
それぞれ流量調整弁Ｖ1、Ｖ2を介して連結されている。
９はポンプ６の吐出側に設置した自動濃度計で、測定し
た圧延油濃度は圧延油制御部１０に入力され、圧延油制
御部１０から指令して流量調整弁Ｖ1、Ｖ2の開閉および
開度を調整することによって、高濃度、低濃度および所
定の中間濃度の圧延油を供給できるよう構成されてい
る。なお、ポンプ６の撹拌能力が不十分で自動濃度計９
までの間に中間濃度の圧延油を均一化できなければ、ポ
ンプ６と自動濃度計９との間に撹拌機を備えたプレミキ
シングタンクを配置し、中間濃度の圧延油を均一にすれ
ばよい。１１は各スタンドへの圧延油エマルションの供
給配管、１２は各スタンドに設けた圧延油エマルション
の戻り受皿で、前記高濃度タンク１および低濃度タンク
３とそれぞれ開閉弁Ｖ3、Ｖ4を介して連結され、圧延油
制御部１０から指令して開閉弁Ｖ3、Ｖ4を開閉すること
によって、戻り受皿１２からの回収圧延油エマルション
を高濃度タンク１または低濃度タンク３に循環できるよ
う構成されている。Example 1 Details of the method of the present invention will be described below with reference to FIG. FIG. 1 is an explanatory diagram of a cold rolling oil supply system of the present invention. In FIG. 1, 1 is a high-concentration tank containing a high-concentration rolling oil 2 having a rolling oil concentration of 5.0%, 3
Is a low-concentration tank containing a low-concentration rolling oil 4 having a rolling oil concentration of 1.0%, 5 is a cold rolling mill for rolling thin steel sheets, and 6 is a rolling oil emulsion supplied to each stand of the cold rolling mill 5. The pump is connected to the high concentration tank 1 and the low concentration tank 3 via flow rate adjusting valves V 1 and V 2 , respectively.
Reference numeral 9 denotes an automatic densitometer installed on the discharge side of the pump 6, and the measured rolling oil concentration is input to the rolling oil control unit 10 and is instructed by the rolling oil control unit 10 to open and close the flow rate adjusting valves V 1 and V 2 . By adjusting the opening, it is possible to supply rolling oil of high concentration, low concentration and a predetermined intermediate concentration. In addition, the stirring capacity of the pump 6 is insufficient and the automatic densitometer 9
If the rolling oil having the intermediate concentration cannot be made uniform until the above, it is sufficient to arrange a premixing tank equipped with a stirrer between the pump 6 and the automatic densitometer 9 to make the rolling oil having the intermediate concentration uniform. . Reference numeral 11 is a pipe for supplying the rolling oil emulsion to each stand, 12 is a return pan for the rolling oil emulsion provided in each stand, and the high-concentration tank 1 and the low-concentration tank 3 are connected via the on-off valves V 3 and V 4 , respectively. The rolling oil controller 10 is connected to the rolling oil control unit 10 to open and close the on-off valves V 3 and V 4 so that the rolling oil emulsion recovered from the return tray 12 can be circulated to the high concentration tank 1 or the low concentration tank 3. ing.
【００１３】上記のとおり構成したことによって、冷間
圧延ミル５で仕上げ板厚が０．１２０〜２．３５０ｍｍ
の薄鋼板を圧延するに際し、仕上げ板厚０．２２０ｍｍ
以下を圧延する場合、仕上げ板厚０．５００ｍｍ以上を
圧延する場合、仕上げ板厚０．２２０ｍｍ超０．５００
ｍｍ未満を圧延する場合において、表１に示すとおり、
流量調整弁Ｖ1、Ｖ2および開閉弁Ｖ3、Ｖ4を開閉させる
と共に、仕上げ板厚０．２２０ｍｍ超０．５００ｍｍ未
満を圧延する場合は、仕上げ板厚に応じて予め圧延油制
御部１０に入力設定されている圧延油濃度と、自動濃度
計９から入力された圧延油濃度とを比較演算し、流量調
整弁Ｖ1、Ｖ2の開度を調整して圧延油濃度を仕上げ板厚
に応じて予め設定された圧延油濃度に制御することによ
って、圧延油の原単位を大幅に低減することができる。
なお、表１中の開閉弁Ｖ3欄の仕上げ板厚０．２２０ｍ
ｍ超０．５００ｍｍ未満の行の開閉は、圧延油濃度＞４
％の場合は開、４％以下は閉、また、表１中の開閉弁Ｖ
4欄の仕上げ板厚０．２２０ｍｍ超０．５００ｍｍ未満
の行の開閉は、圧延油濃度＞４％の場合は閉、４％以下
は開を示す。With the above-described structure, the finished plate thickness of the cold rolling mill 5 is 0.120 to 2.350 mm.
Finished plate thickness 0.220mm when rolling thin steel plate
When rolling the following, when finishing plate thickness 0.500mm or more, when finishing plate thickness 0.220mm over 0.500
When rolling less than mm, as shown in Table 1,
When the flow rate adjusting valves V 1 and V 2 and the on-off valves V 3 and V 4 are opened and closed and the finished plate thickness of more than 0.220 mm and less than 0.500 mm is rolled, the rolling oil control unit 10 is preliminarily set according to the finished plate thickness. The rolling oil concentration input and set to the rolling oil concentration input from the automatic densitometer 9 is compared and calculated, and the openings of the flow rate adjusting valves V 1 and V 2 are adjusted to obtain the rolling oil concentration. By controlling the concentration of the rolling oil preset according to the above, it is possible to significantly reduce the basic unit of the rolling oil.
The finish plate thickness of the on-off valve V 3 column in Table 1 is 0.220 m.
Rolling oil concentration> 4 when opening and closing rows that are larger than m and less than 0.500 mm
% Open, 4% or less close, and open / close valve V in Table 1
The opening and closing of the row of the finished plate thickness of more than 0.220 mm and less than 0.500 mm in the fourth column indicates closed when the rolling oil concentration> 4%, and open when 4% or less.
【００１４】[0014]
【表１】 [Table 1]
【００１５】実施例２ 実施例１の冷間圧延油の供給システムに改善し、仕上げ
板厚０．１２０ｍｍないし２．３５０ｍｍの薄板を圧延
するに際し、合成エステルからなる圧延油濃度５．０％
の高濃度圧延油と、圧延油濃度１．０％の低濃度圧延油
を使用し、仕上げ板厚０．２２０ｍｍ以下の場合は、圧
延油濃度５．０％の高濃度圧延油を使用し、仕上げ板厚
０．５００ｍｍ以上の場合は、圧延油濃度１．０％の低
濃度圧延油を使用し、仕上げ板厚０．２２０ｍｍ超０．
５００ｍｍ未満の場合は、図４に示すとおり、仕上げ板
厚に応じて最適圧延油濃度となるよう高濃度圧延油と低
濃度圧延油を混合し、噴射圧力４．０〜５．０ｋｇ／ｃ
ｍ2・Ｇ、流量４００〜２０００ｌ／ｍｉｎ、圧延油温
度５０〜６０℃で供給して冷間圧延した。この場合回収
圧延油は、圧延油濃度４％超は高濃度タンクに回収し、
圧延油濃度４％以下は低濃度タンクに回収した。この場
合における圧延サイクルは、図３（ｂ）に示すとおり、
最初に高濃度タンクに１０００リットルの高濃度圧延油
を投入し、低濃度へは切替えのみで水の補給により濃度
調整し、再度高濃度へも切替えのみで対処し、次の低濃
度への切替え時に濃度調整する際、低濃度タンクの上層
部を捨てて浮上異物を除去し、クーラントの純度を向上
させるスキミングを実施して一部低濃度圧延油を排出す
ることを繰り返した。Example 2 The cold rolling oil supply system of Example 1 was improved, and when rolling a thin plate having a finished plate thickness of 0.120 mm to 2.350 mm, a rolling oil concentration of synthetic ester of 5.0% was obtained.
High-concentration rolling oil and low-concentration rolling oil with a rolling oil concentration of 1.0% are used. If the finished plate thickness is 0.220 mm or less, high-concentration rolling oil with a rolling oil concentration of 5.0% is used. When the finished plate thickness is 0.500 mm or more, a low-concentration rolling oil with a rolling oil concentration of 1.0% is used, and the finished plate thickness exceeds 0.220 mm and is less than 0.20 mm.
When it is less than 500 mm, as shown in FIG. 4, high-concentration rolling oil and low-concentration rolling oil are mixed so that the optimum rolling oil concentration is obtained according to the finished plate thickness, and the injection pressure is 4.0 to 5.0 kg / c.
m 2 · G, a flow rate of 400 to 2000 l / min, a rolling oil temperature of 50 to 60 ° C., and cold rolling was performed. In this case, the recovered rolling oil is recovered in a high-concentration tank if the rolling oil concentration exceeds 4%,
The rolling oil concentration of 4% or less was collected in a low concentration tank. The rolling cycle in this case is as shown in FIG.
First, add 1000 liters of high-concentration rolling oil to the high-concentration tank, adjust the concentration by replenishing water by simply switching to a low concentration, then deal with switching to a high concentration again, then switching to the next low concentration. At times, when adjusting the concentration, the upper layer of the low concentration tank was discarded to remove floating foreign substances, skimming was performed to improve the purity of the coolant, and part of the low concentration rolling oil was discharged.
【００１６】また、比較のため、従来の１タンク方式
で、図３（ａ）に示すとおり、高濃度から低濃度への切
替え毎に濃度調整のために添加する水によって余剰とな
る圧延油を排出し、再度高濃度への切替え時に圧延油を
補給し、噴射圧力４．０〜５．０ｋｇ／ｃｍ2・Ｇ、流
量４００〜２０００ｌ／ｍｉｎ、圧延油温度５０〜６０
℃で供給した改善前の場合についても同様に冷間圧延し
た。この発明の冷間圧延油の供給システムに改善後およ
び改善前のそれぞれについて、圧延油の原単位を求め
た。その結果を図２に示す。図２に示すとおり、本発明
方法を採用することによって薄鋼板圧延時における圧延
油の原単位は、改善前の０．５５０ｌ／Ｔｏｎから０．
３５０ｌ／Ｔｏｎと著しく低減しており、その効果は明
らかである。Further, for comparison, in the conventional one-tank system, as shown in FIG. 3 (a), excess rolling oil due to water added for concentration adjustment is added every time switching from high concentration to low concentration. Discharge and replenish the rolling oil at the time of switching to a high concentration again, injection pressure 4.0-5.0 kg / cm 2 · G, flow rate 400-2000 l / min, rolling oil temperature 50-60
Similarly, cold rolling was performed in the case before the improvement that was supplied at 0 ° C. The basic unit of the rolling oil was calculated for each of the cold rolling oil supply system of the present invention after improvement and before improvement. The result is shown in FIG. As shown in FIG. 2, by adopting the method of the present invention, the unit consumption of rolling oil at the time of rolling a thin steel sheet is 0.550 l / Ton before improvement to 0.
It is significantly reduced to 350 l / Ton, and its effect is clear.
【００１７】[0017]
【発明の効果】以上述べたとおり、この発明方法によれ
ば、最終圧延厚さの異なる圧延を同一の冷間圧延機にお
いて行う際、各々の板厚に適した圧延油濃度で供給でき
ると共に、余分な圧延油の投入、排出を抑制して圧延油
の原単位を著しく低減することができる。As described above, according to the method of the present invention, when rolling with different final rolling thicknesses is carried out in the same cold rolling mill, it is possible to supply the rolling oil concentration suitable for each sheet thickness, and It is possible to significantly reduce the unit consumption of rolling oil by suppressing the input and discharge of extra rolling oil.
【図１】この発明の冷間圧延油の供給システムの説明図
である。FIG. 1 is an explanatory diagram of a cold rolling oil supply system of the present invention.
【図２】実施例２におけるこの発明の冷間圧延油の供給
システムに改善前後の圧延油原単位を示すグラフであ
る。FIG. 2 is a graph showing rolling oil basic units before and after improvement in the cold rolling oil supply system of the present invention in Example 2.
【図３】実施例２におけるこの発明の冷間圧延油の供給
システムに改善前後の圧延サイクルと圧延油の投入排出
状況を示すもので、（ａ）図は改善前、（ｂ）図は改善
後である。[Fig. 3] Fig. 3 shows rolling cycles before and after improvement and a charging / discharging situation of rolling oil in the cold rolling oil supply system of the present invention in Example 2, where (a) is before improvement and (b) is improvement. Later.
【図４】仕上げ板厚と圧延湯濃度と高濃度圧延油の混合
比率との関係を示すグラフである。FIG. 4 is a graph showing the relationship between the finished plate thickness, the concentration of hot rolling water, and the mixing ratio of high-concentration rolling oil.
１ 高濃度タンク ２ 高濃度圧延油 ３ 低濃度タンク ４ 低濃度圧延油 ５ 冷間圧延ミル ６ ポンプ ９ 自動濃度計 １０ 圧延油制御部 １１ 供給配管 １２ 戻り受皿 Ｖ1、Ｖ2 流量調整弁 Ｖ3、Ｖ4 開閉弁1 High-concentration tank 2 High-concentration rolling oil 3 Low-concentration tank 4 Low-concentration rolling oil 5 Cold rolling mill 6 Pump 9 Automatic concentration meter 10 Rolling oil control unit 11 Supply pipe 12 Return pan V 1 , V 2 Flow rate adjusting valve V 3 , V 4 open / close valve
Claims (1)
の冷間圧延機において行う際の冷間圧延機に圧延油エマ
ルションを供給する方法において、高濃度と低濃度の二
つの圧延油エマルションタンクを設け、高濃度タンクと
低濃度タンクのそれぞれと圧延油エマルション供給ポン
プを流量調整弁を介して連結し、かつ、冷間に供された
圧延油エマルションの戻り受皿と前記高濃度タンクおよ
び低濃度タンクを開閉弁を介して連結し、仕上げ板厚に
応じて薄物ゲージは高濃度タンクより、厚物ゲージは低
濃度タンクより独立して圧延油エマルションを供給循環
させ、中間ゲージは高濃度タンクと低濃度タンクのそれ
ぞれの流量調整弁の開度を、吐出側に設けた自動濃度計
の検出濃度に応じて調整し、仕上げ板厚に応じて圧延油
エマルションの濃度を調整すると共に、戻り受皿からの
圧延油エマルションの所定濃度以下を低濃度タンクへ流
入させることを特徴とする冷間圧延油の供給方法。1. A method of supplying a rolling oil emulsion to a cold rolling mill when rolling thin steel sheets having different finish thicknesses in the same cold rolling mill, wherein two rolling oil emulsions of high concentration and low concentration are used. A tank is provided, the high-concentration tank and the low-concentration tank are respectively connected to the rolling oil emulsion supply pump through a flow rate adjusting valve, and the return pan of the rolling oil emulsion that has been cold-processed and the high-concentration tank and the low concentration tank are connected. Concentration tanks are connected via an on-off valve, and rolling oil emulsion is circulated independently from the high-concentration tank for the thin gauge and the low-concentration tank for the thick gauge according to the finished plate thickness, and the intermediate gauge is the high-concentration tank. The opening of the flow rate adjusting valve of each of the low concentration tank and the low concentration tank is adjusted according to the detected concentration of the automatic concentration meter installed on the discharge side, and the concentration of the rolling oil emulsion is adjusted according to the finished plate thickness. The method for supplying cold rolling oil is characterized in that a predetermined concentration or less of the rolling oil emulsion from the return pan is caused to flow into the low concentration tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6323804A JPH08155510A (en) | 1994-11-30 | 1994-11-30 | Method for feeding cold rolling oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6323804A JPH08155510A (en) | 1994-11-30 | 1994-11-30 | Method for feeding cold rolling oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08155510A true JPH08155510A (en) | 1996-06-18 |
Family
ID=18158800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6323804A Pending JPH08155510A (en) | 1994-11-30 | 1994-11-30 | Method for feeding cold rolling oil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08155510A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010056651A (en) * | 1999-12-16 | 2001-07-04 | 이구택 | Fast returning method of mill-oil of tendem cold mill |
| WO2006054780A1 (en) | 2004-11-22 | 2006-05-26 | Nippon Steel Corporation | Method for supplying lubricating oil in cold rolling |
| DE102009056262A1 (en) | 2009-12-01 | 2011-06-09 | Sms Siemag Aktiengesellschaft | Process for rolling a rolling stock |
| DE102009056264A1 (en) | 2009-12-01 | 2011-06-09 | Sms Siemag Aktiengesellschaft | Process for rolling a rolling stock |
| CN103846281A (en) * | 2012-11-28 | 2014-06-11 | 宝山钢铁股份有限公司 | Device and method for preventing emulsion channeling between cold rolling unit frames |
| CN115740049A (en) * | 2022-11-17 | 2023-03-07 | 首钢智新迁安电磁材料有限公司 | Silicon steel cold continuous rolling lubricating system and method |
-
1994
- 1994-11-30 JP JP6323804A patent/JPH08155510A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010056651A (en) * | 1999-12-16 | 2001-07-04 | 이구택 | Fast returning method of mill-oil of tendem cold mill |
| WO2006054780A1 (en) | 2004-11-22 | 2006-05-26 | Nippon Steel Corporation | Method for supplying lubricating oil in cold rolling |
| KR100867018B1 (en) * | 2004-11-22 | 2008-11-10 | 신닛뽄세이테쯔 카부시키카이샤 | Method for supplying lubricating oil in cold rolling |
| US8720244B2 (en) | 2004-11-22 | 2014-05-13 | Nippon Steel & Sumitomo Metal Corporation | Method of supplying lubrication oil in cold rolling |
| DE102009056262A1 (en) | 2009-12-01 | 2011-06-09 | Sms Siemag Aktiengesellschaft | Process for rolling a rolling stock |
| WO2011067123A1 (en) | 2009-12-01 | 2011-06-09 | Sms Siemag Ag | Method for rolling a product to be rolled |
| DE102009056264A1 (en) | 2009-12-01 | 2011-06-09 | Sms Siemag Aktiengesellschaft | Process for rolling a rolling stock |
| WO2011067119A1 (en) | 2009-12-01 | 2011-06-09 | Sms Siemag Ag | Method for rolling a product which is to be rolled |
| CN103846281A (en) * | 2012-11-28 | 2014-06-11 | 宝山钢铁股份有限公司 | Device and method for preventing emulsion channeling between cold rolling unit frames |
| CN103846281B (en) * | 2012-11-28 | 2016-01-20 | 宝山钢铁股份有限公司 | A kind of apparatus and method preventing emulsion channeling between cold mill complex frame |
| CN115740049A (en) * | 2022-11-17 | 2023-03-07 | 首钢智新迁安电磁材料有限公司 | Silicon steel cold continuous rolling lubricating system and method |
| CN115740049B (en) * | 2022-11-17 | 2023-09-15 | 首钢智新迁安电磁材料有限公司 | Silicon steel cold continuous rolling lubrication system and method |
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