200904558 九、發明說明： 【發明所屬之技術領域ϋ 技術領域 本發明係有關於一種鋼板製造過程中之冷卻控制方 法、冷卻控制裝置、冷卻水量計算裝置、電腦程式及記錄 媒體’特別係關於一種適合使用於對壓延後之鋼板進行冷 卻時的技術。 背景技術 10 至今，已提出一種冷卻控制方法，該方法係測量冷卻 運行中之鋼板溫度，變動喷射於鋼板上面及下面之冷卻水 量以使冷卻結束溫度為所需之溫度，並修正鋼板之上面溫 度與下面溫度的差，以防止因鋼板之上面溫度與下面溫度 的差而使鋼板形狀變形（例如，參照特公平7_41303號公報）。 15 又，在特開昭60-210313號公報所記載的冷卻方法中， 係依由被冷卻材之大小等所決定的係數而決定冷卻水量的 上下比率，而冷卻中之鋼板溫度與冷卻水量及熱傳係數有 很大的關係’亦即，前述熱傳係數係鋼板表面溫度的函數。 因此，由於冷卻開始時之鋼板溫度狀態會依各冷卻對 2〇象而不同’且冷卻中之鋼板表面溫度變化時時刻刻都在變 動，故因上述原因而產生的熱傳係數變化並無法正確地反 映於冷卻水量。所以，僅決定水量的上下比率並無法以高 精準度防止鋼板形狀變差。 為了解決前述問題，記載於特公平7_29139號公報中的 5 200904558 冷卻方法，係於壓延結束時預測計算冷卻開始時點的溫 度，使用將前述計算結果作為初始狀態的傳熱方程式，計 算出時時刻刻都在變化的表面溫度狀態及熱傳係數，藉此 可以高精準度地決定可抑制冷卻中鋼板形狀變差的水量上 5 下比。 然而，如前所述，由於熱傳係數會對冷卻開始時之鋼 板溫度產生很大的影響，故以在壓延結束時預測冷卻開始 溫度為前提的特公平7-29139號公報中所記載的冷卻方 法，會受到壓延結束時到冷卻開始為止之區間内各種干擾 10 的影響。因此，決定於壓延結束時之水量上下比也會包含 很多誤差，所以特公平7-29139號公報之冷卻方法的問題在 於抑制鋼板形狀變差之效果有其限度。 因此，可同時解決上述特開昭60-210313號公報及特公 平7-29139號公報之冷卻方法問題點的方法，係例如記載於 15 特開平2-70018號公報中之冷卻方法，該方法係藉由設置於 冷卻開始位置之溫度計實際測量結果來計算冷卻上下水量 比，並使用考慮一直在變化之表面溫度狀態與熱傳係數的 傳熱方程式，試著計算出上下溫度分布為一定之水量上下 比。 20 【發明内容】 發明揭示 記載於前述特開平2-70018號公報之冷卻方法，可能可 以高精準度求出水量上下比，但是，由於該冷卻方法係使 用傳熱方程式反覆計算進行探求而求出冷卻水量的上下 6 200904558 比，因此會使計算量變得很龐大。所以，會有直到得出結 算結果為止需要很多時間的問題。結果，很可能會發生鋼 板進入冷卻裝置後延遲開始注水的情況，或者也可能必須 使鋼板在冷卻裝置前停止而呈待機狀態直到開始注水為止 5 等，因此在實行上有其困難。 本發明有鑑於前述問題，目的係將鋼板冷卻至事先預 定之冷卻結束溫度時，迅速地控制喷射自冷卻裝置之上下 面的冷卻水量，以高精準度防止因上面與下面之冷卻速度 差而產生的鋼板形狀變形。 10 本發明之一種冷卻控制方法係以冷卻裝置將壓延後之 鋼板進行冷卻者，該冷卻控制方法包含有：預定冷卻程序 設定步驟，係根據設置於前述冷卻裝置進入側之溫度計測 量前述鋼板通過前述冷卻裝置内部時之溫度的測量值，運 算關於前述冷卻裝置内部之複數位置中，將前述鋼板冷卻 15 至預定溫度所需之冷卻條件而設定預定冷卻程序者；熱傳 係數計算步驟，係從前述預定冷卻程序設定步驟所設定之 預定冷卻程序的溫度、及可冷卻前述鋼板之一面之冷卻水 的第1冷卻水量密度，計算出顯示熱傳導容易度之熱傳係數 者；上下比計算步驟，係從前述熱傳係數計算步驟所計算 20 出之熱傳係數，計算出可冷卻前述鋼板之另一面之冷卻水 的第2冷卻水量密度，並計算前述第1冷卻水量密度與前述 第2冷卻水量密度之上下比者；及冷卻水量控制步驟，係根 據由前述上下比計算步驟所計算之上下比，控制可冷卻通 過前述冷卻裝置内部之鋼板的冷卻水量者。 7 200904558 又，本發明之冷卻控制裝置係以冷卻裝置將壓延後之 鋼板進行冷卻者，該冷卻控制裝置包含有：預定冷卻程序 設定機構，係可根據設置於前述冷卻裝置進入側之溫度計 測量前述鋼板通過前述冷卻裝置内部時之溫度的測量值， 5 運算關於前述冷卻裝置内部之複數位置中，將前述鋼板冷 卻至預定溫度所需之冷卻條件而設定預定冷卻程序者；熱 傳係數計算機構，係可從前述預定冷卻程序設定機構所設 定之預定冷卻程序的溫度、及可冷卻前述鋼板之一面之冷 卻水的第1冷卻水量密度，計算出顯示熱傳導容易度之熱傳 10 係數者；上下比計算機構，係可從前述熱傳係數計算機構 所計算出之熱傳係數，計算出可冷卻前述鋼板之另一面之 冷卻水的第2冷卻水量密度，並計算前述第1冷卻水量密度 與前述第2冷卻水量密度之上下比者；及冷卻水量控制機 構，係可根據由前述上下比計算機構所計算之上下比，控 15 制可冷卻通過前述冷卻裝置内部之鋼板的冷卻水量者。 此外，本發明之冷卻水量計算裝置係可計算以冷卻裝 置將壓延後之鋼板進行冷卻時所需的冷卻水量者，該冷卻 水量計算裝置包含有：預定冷卻程序設定機構，係可根據 設置於前述冷卻裝置進入側之溫度計測量前述鋼板通過前 20 述冷卻裝置内部時之溫度的測量值，運算關於前述冷卻裝 置内部之複數位置中，將前述鋼板冷卻至預定溫度所需之 冷卻條件而設定預定冷卻程序者；熱傳係數計算機構，係 可從前述預定冷卻程序設定機構所設定之預定冷卻程序的 溫度、及可冷卻前述鋼板之一面之冷卻水的第1冷卻水量密 8 200904558 度，計算出顯示熱傳導容易度之熱傳係數者；及上下比計 算機構，係可從前述熱傳係數計算機構所計算出之熱傳係 數，計算出可冷卻前述鋼板之另一面之冷卻水的第2冷卻水 量密度，並計算前述第1冷卻水量密度與前述第2冷卻水量 5 密度之上下比者。 又，本發明之電腦程式係可使電腦執行如前述之冷卻 控制方法者。此外，本發明之記錄媒體係記錄有如前述之 電腦程式者。 圖式簡單說明 ίο 第1圖係顯示本發明第1實施型態之鋼板製造線之一例 的圖。 第2圖係顯示本發明第1實施型態中之冷卻裝置之内部 構成例的圖。 第3圖係顯示本發明第1實施型態中之包含冷卻水量計 15 算裝置之控制系統之概略構成例的方塊圖。 第4圖係顯示藉由本發明第1實施型態之冷卻水量計算 裝置決定冷卻水量之步驟之一例的流程圖。 第5圖係顯示本發明第1實施型態中鋼板裏面溫度與下 部熱傳係數間之關係的圖。 20 第6圖係顯示本發明第1實施型態中鋼板表面溫度與上 部熱傳係數間之關係的圖。 第7圖係顯示板厚方向之11點之溫度分布的圖。 第8圖係顯示通過冷卻裝置之鋼板位置的圖。 第9圖係顯示本發明第1實施型態中探求冷卻上部水量 9 200904558 密度之方法的圖。 第10圖係顯示本發明第1實施型態中之冷卻溫度推移 之一例的特性圖。 第11圖係顯示本發明第1實施型態之上下比計算部計 5算冷卻上部水量之步驟之一例的流程圖。 【實施方式】 實施發明之最佳型態 (第1實施型態） 以下’參照圖示，說明本發明之最佳型態。 10 第1圖中顯示使用本發明之鋼板製造線之一例。 如第1圖所示，依序配置有：精軋壓延機2，係可將經 過未圖示之加熱爐或粗軋壓延機而粗略成形之鋼板1壓延 至目標板厚者；矯正機3，係可矯正精軋壓延後之鋼板 狀者’及冷卻裝置4，係可將矯正後之鋼板1加速冷卻者， 15如上述之配置可使加速冷卻後之鋼板1成為具有所需形狀 及材質的製品。 在精札壓延機2之輸入側配置有精軋前面溫度計5,而 在輸出側則配置有精乾輸出側溫度計6。又，在冷卻裝置4 之進入側，配置有冷卻輸入側溫度計7。在本實施型態中， 20各溫度計係可測定鋼板1之上面及下面的溫度。 第2圖係顯示冷卻裝置4之内部構成例的圖。在冷卻裝 置4的内部’配置排列有多數可搬送鋼板丨之輥群41，並且 在各冷卻區1Z〜19Z中，於鋼板丨之上面及下面配置排列有 多數可喷射冷卻水之噴嘴群(未圖示）。從前述噴嘴群所噴射 200904558 之冷卻水係藉由流量控 板之板厚或板長等條件別控誠量，並可依鋼 量。在本實施型態中整使用區數或各嗔嘴之喷射 入側溫度計7。 7部裴置4之輸入側配置有冷卻輸 第3圖係顯示包含本會 ^ 之控制系統概略構成的型態之冷卻水量計算裳置綱 連接有：壓延控制裝置2〇 。在冷卻水量計算裝置100， 各壓延機的综合控制者·生^可進行包含_壓延機2之 產管理者;資料輸入輪出=〇咖㈣如^ 10 15 算裝置1〇〇所輸出之各種資料，或對於冷卻水量計二置 ⑽輸出來自於者之輸人等者；及冷㈣Μ溫度朴 此外，在冷卻水量計算農置100，連接有冷卻水量控制 裝置500 ’該冷卻水量控制裝置5〇〇係可控制冷卻裝置4之各 冷卻區1Ζ〜19Ζ的流量控制閥501而控制冷卻水量者。 亦即，冷卻水量計算裝置丨〇 〇可根據由冷卻輪入側溫度 計7、壓延控制裝置200、生產管理裝置3〇〇及資料輸入輸出 裝置400等所輸入的資料，進行由冷卻水量控制裝置5〇〇所 控制之冷卻水量的計算。 特別地，本實施型態之冷卻水量計算裝置100係可藉由 一面搬送精軋壓延後之鋼板1 ’ 一面發送關於冷卻水量控制 裝置500所需之冷卻水量的資料’而可決定冷卻裝置4之注 水量者。 更具體而言，本實施型態之冷卻水量計算裝置100包含 有：預定冷卻程序設定部101，係可因應目標冷卻結束溫度 11 200904558 資訊，設定冷卻裝置4之鋼板1的預定冷卻程序者；熱傳係 數計算部102,係可取得冷卻裝置4中鋼板1之預定部位的熱 傳係數者；及上下比計算部103，係可根據由預定冷卻程序 設定部101所設定之預定冷卻程序、與由熱傳係數計算部 5 102所取得之熱傳係數，計算出反映於冷卻水量控制裝置 500之上面及下面的水量密度比者。 第4圖係顯示本實施型態中，藉由冷卻水量計算裝置 100決定冷卻水量之步驟之一例的流程圖。 在步驟S401中，預定冷卻程序設定部101設定冷卻裝置 10 4對於鋼板1的預定冷卻程序。具體而言，進行處理以測定 由冷卻輸入側溫度計7所測量之鋼板1表面溫度，求出在進 行冷卻前之時點，各區段的板厚方向溫度分布。 已知板厚方向的溫度分布係呈板厚方向中間位置之溫 度最高的拋物線狀。又，從表面溫度求出板厚方向之溫度 15 分布的方法可使用例如特公平7-41303號公報所揭示的方 法，而決定板厚方向11點的溫度分布（參照第7圖）。如果概 要說明，則上表面溫度1>係測量出的溫度，而上表面與板 溫最高點間之溫度差AT依下面式（1)算出。 AT=33.8 — 3_63h ( -0.0371 + 0.00528h) · TF... (1) 20 AT :上表面與板溫最高點的溫度差，h :板厚。 而下表面溫度TL則依下式(2)算出。 TL= TF +Κ]ξ ( ATScon+ATSclass ) +K2··· (2) ξ :由學習所得之溫度變換係數，ATS :由學習所得之 輸入側溫度上下面溫度差，K!、K2 :由調整要素決定。決 12 200904558 定滿足以上條件之拋物線狀溫度分布，並決定板厚方向之 溫度分布。 而且，將冷卻前之時點的各區之板厚方向溫度分布作 為初始值，根據所需之控制精準度將前述板厚方向分割成 5適當的長度(例如11點）而作為計算對象點，以熱傳遞差分方 程式解出冷卻裝置4至冷卻開純置為止的溫度推移^此 算出冷卻裝置4之冷卻開始位置之各區的板厚方向平均溫 度Tsk*(以下稱為「冷卻開始溫度Tsk*」，k為厚度方向指 數）’以作為冷卻開始溫度資訊。關於藉由解出熱傳遞差分 10方程式而分析溫度推移的方法，也揭示如例如特公平 7-41303號公報，概要說明如下，根據板厚方向之初始溫度 分布狀態，將板上之代表點之11點作為計算對象點，依下 式(3)所示之1次熱傳遞差分方程式進行計算。 (j)t+At=Q⑴t +At · (λ』+ ! - 2λ」· +λ| -1 )/ρ · Δχ2 〜1 ” 15 AQs = 4.88[[(Tg + 273)/100]4 - [(T(j) + 273)/100]4 ](j = i ，ll) = 〇(j = 2〜10)…(3) Q(j)t :時刻t之要素j的含熱量，T(j):表示同溫，Δι : 差分計算之固定時間（=const, 150msec)，p :密度，人：要素j 之熱傳遞率’ Tg .氣溫’ AQS :界線條件，Αχ :板厚分割 20 厚。此時，從板溫度Τ變換成熱量Q時， 若Τ> 880，則Q = 3.333 + 0.16T， 若TS 880，則 Q = — 149.05 + 0.481 · — 1 _68xl0-4 . T2 ; 從含熱量Q變換成溫度T時(含熱量：將比熱從進行積 分之值）， 25 若Q> 144_13，則T= —20_8 + 6.25xQ， 13 200904558 若0<QS144.13，則T=1431.5 —，（1.162xl06— 5.95x 103xQ)。 然後，預定冷卻程序設定部101基於各區（1Z〜19Z)之 冷卻通過速度，計算各區之通過時間（TMz)與冷卻預測溫度 5 (Tsk)而進行設定。在此，冷卻預測溫度(Tsk)係如第10圖所 示，表示各區之分割成數份之一個區域的輸入側溫度。 冷卻通過速度係藉由記載於特公平7-41303號公報之 方法，係由鋼板前端之位置與搬送速度的資料組所得。如 第8圖所示，將鋼板前端之位置作為X，當此時之搬送速度 10 為V(x)時，板上此時位於冷卻裝置入口的k點，換言之，位 於距離鋼板前端為X之某點的水冷時間為： t(x) =ί -dx x+Lzone V(x) 接著，以下式求出前端、中央、末端部的水冷時間tt tm 、 tb 0 15200904558 IX. Description of the Invention: TECHNICAL FIELD The present invention relates to a cooling control method, a cooling control device, a cooling water amount calculation device, a computer program, and a recording medium in a steel plate manufacturing process, particularly relating to a suitable It is used in the technique of cooling the rolled steel sheet. BACKGROUND ART Heretofore, a cooling control method has been proposed which measures the temperature of a steel sheet in a cooling operation, varies the amount of cooling water sprayed on and under the steel sheet so that the cooling end temperature is a desired temperature, and corrects the upper temperature of the steel sheet. The difference from the temperature below is to prevent the shape of the steel sheet from being deformed by the difference between the temperature of the upper surface of the steel sheet and the temperature of the lower surface (for example, refer to Japanese Patent Publication No. Hei 7-41303). In the cooling method described in JP-A-60-210313, the upper and lower ratios of the amount of cooling water are determined according to the coefficient determined by the size of the material to be cooled, etc., and the temperature of the steel sheet and the amount of cooling water during cooling are The heat transfer coefficient has a large relationship 'that is, the aforementioned heat transfer coefficient is a function of the surface temperature of the steel sheet. Therefore, since the temperature state of the steel sheet at the start of cooling differs depending on the two cooling images, and the surface temperature of the steel sheet during cooling changes at all times, the change in the heat transfer coefficient due to the above causes is not correct. The ground is reflected in the amount of cooling water. Therefore, it is not possible to prevent the shape of the steel sheet from being deteriorated with high precision by merely determining the upper and lower ratio of the amount of water. In order to solve the above problem, the 5 200904558 cooling method described in Japanese Patent Publication No. Hei 7-29139 is for predicting the temperature at the start of cooling at the end of rolling, and calculating the time and moment using the heat transfer equation in which the calculation result is the initial state. The surface temperature state and the heat transfer coefficient are all changed, whereby the amount of water that can suppress the shape of the steel sheet during cooling can be determined with high precision. However, as described above, since the heat transfer coefficient greatly affects the temperature of the steel sheet at the start of cooling, the cooling described in Japanese Patent Publication No. 7-29139, which is based on the prediction of the cooling start temperature at the end of rolling, is used. The method is affected by various disturbances 10 in the interval from the end of rolling to the start of cooling. Therefore, since the amount of water up-and-down ratio at the end of rolling is also included, there are many errors. Therefore, the problem of the cooling method of Japanese Patent Publication No. 7-29139 is limited in the effect of suppressing the deterioration of the shape of the steel sheet. Therefore, the method of cooling the method of the method of the above-mentioned Japanese Patent Publication No. Hei. No. Hei. Calculate the cooling water ratio by the actual measurement result of the thermometer set at the cooling start position, and use the heat transfer equation considering the surface temperature state and the heat transfer coefficient which are always changing, and try to calculate the upper and lower temperature distribution to a certain amount of water. ratio. In the cooling method of the above-mentioned Japanese Patent Publication No. Hei 2-70018, it is possible to obtain the upper-lower ratio of the water amount with high accuracy. However, the cooling method is obtained by searching for the heat transfer equation repeatedly. The amount of cooling water is higher than the upper limit of 200904558, so the amount of calculation becomes very large. Therefore, there will be a problem that requires a lot of time until a settlement result is obtained. As a result, it is highly probable that the steel sheet enters the cooling device and delays the start of water injection, or it may be necessary to stop the steel sheet before the cooling device and stand by until the start of water injection, etc., so that it is difficult to carry out. The present invention has in view of the foregoing problems, and an object is to rapidly control the amount of cooling water sprayed from above and below the cooling device when the steel sheet is cooled to a predetermined cooling end temperature, thereby preventing high temperature from being generated due to a difference in cooling rate between the upper surface and the lower surface. The shape of the steel plate is deformed. A cooling control method according to the present invention is configured to cool a rolled steel sheet by a cooling device, the cooling control method comprising: a predetermined cooling program setting step of measuring the steel sheet by the thermometer provided on the inlet side of the cooling device Calculating the temperature of the inside of the cooling device, calculating a predetermined cooling procedure for cooling conditions required to cool the steel sheet to a predetermined temperature in a plurality of positions inside the cooling device; and calculating a heat transfer coefficient from the foregoing The temperature of the predetermined cooling program set in the cooling program setting step and the first cooling water amount density of the cooling water on one side of the steel sheet are calculated, and the heat transfer coefficient indicating the ease of heat conduction is calculated; Calculating a heat transfer coefficient calculated by the heat transfer coefficient calculation step, calculating a second cooling water amount density of the cooling water that can cool the other side of the steel sheet, and calculating the first cooling water amount density and the second cooling water amount density The upper and lower ratio; and the cooling water quantity control step are based on Said upper and lower vertical ratio of the calculated ratio calculating step of controlling the steel sheet may be cooled through the inside of the cooling water by the cooling device. 7 200904558 Further, in the cooling control device of the present invention, the rolled steel plate is cooled by a cooling device, and the cooling control device includes a predetermined cooling program setting mechanism that measures the aforementioned temperature based on a thermometer provided on the inlet side of the cooling device. a temperature measurement value of the steel sheet passing through the inside of the cooling device, 5 calculating a predetermined cooling program for cooling conditions required to cool the steel sheet to a predetermined temperature in a plurality of positions inside the cooling device; a heat transfer coefficient calculating means, The heat transfer 10 coefficient indicating the ease of heat conduction can be calculated from the temperature of the predetermined cooling program set by the predetermined cooling program setting means and the first cooling water amount density of the cooling water which can cool one surface of the steel sheet; The calculation mechanism calculates the second cooling water amount density of the cooling water that can cool the other side of the steel sheet from the heat transfer coefficient calculated by the heat transfer coefficient calculating means, and calculates the first cooling water amount density and the foregoing 2 cooling water volume density ratio; and cooling water volume control mechanism The system can control the amount of cooling water passing through the steel plate inside the cooling device according to the upper-lower ratio calculated by the upper-lower ratio calculating means. Further, the cooling water amount calculating device of the present invention can calculate the amount of cooling water required for cooling the rolled steel plate by the cooling device, and the cooling water amount calculating device includes: a predetermined cooling program setting mechanism, which can be provided according to the foregoing The thermometer on the entry side of the cooling device measures the measured value of the temperature of the steel sheet passing through the inside of the cooling device described above, and calculates the cooling condition required to cool the steel sheet to a predetermined temperature in the plurality of positions inside the cooling device to set the predetermined cooling. a program for calculating a heat transfer coefficient, wherein the temperature of the predetermined cooling program set by the predetermined cooling program setting means and the first cooling water amount of the cooling water that can cool one surface of the steel plate are 8 200904558 degrees, and the display is calculated. The heat transfer coefficient of the heat conduction easiness; and the upper and lower ratio calculation mechanism calculates the second cooling water density of the cooling water that can cool the other side of the steel plate from the heat transfer coefficient calculated by the heat transfer coefficient calculating means And calculating the first cooling water amount density and the second cooling water amount 5 The density is higher than the lower. Further, the computer program of the present invention allows the computer to execute the cooling control method as described above. Further, the recording medium of the present invention is recorded as a computer program as described above. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an example of a steel sheet manufacturing line according to a first embodiment of the present invention. Fig. 2 is a view showing an example of the internal configuration of a cooling device in the first embodiment of the present invention. Fig. 3 is a block diagram showing a schematic configuration example of a control system including a cooling water gauge 15 in the first embodiment of the present invention. Fig. 4 is a flow chart showing an example of a procedure for determining the amount of cooling water by the cooling water amount calculating device according to the first embodiment of the present invention. Fig. 5 is a view showing the relationship between the inside temperature of the steel sheet and the heat transfer coefficient of the lower portion in the first embodiment of the present invention. Fig. 6 is a view showing the relationship between the surface temperature of the steel sheet and the upper heat transfer coefficient in the first embodiment of the present invention. Fig. 7 is a view showing the temperature distribution at 11 o'clock in the thickness direction. Figure 8 is a diagram showing the position of the steel plate passing through the cooling device. Fig. 9 is a view showing a method of searching for the density of the upper water amount 9 200904558 in the first embodiment of the present invention. Fig. 10 is a characteristic diagram showing an example of the cooling temperature transition in the first embodiment of the present invention. Fig. 11 is a flow chart showing an example of the procedure of calculating the upper water amount by the calculation unit in the first embodiment of the present invention. [Embodiment] BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) Hereinafter, the best mode of the present invention will be described with reference to the drawings. 10 Fig. 1 shows an example of a steel sheet manufacturing line using the present invention. As shown in Fig. 1, the finish rolling calender 2 is sequentially arranged to roll the steel sheet 1 which has been roughly formed by a heating furnace or a rough rolling calender (not shown) to a target thickness; the straightening machine 3, The steel plate shape after the finish rolling and the cooling device 4 can be corrected, and the corrected steel plate 1 can be accelerated and cooled. 15 The above arrangement can make the steel plate 1 after the accelerated cooling have the desired shape and material. product. A finishing front thermometer 5 is disposed on the input side of the finishing calender 2, and a lean output side thermometer 6 is disposed on the output side. Further, on the entry side of the cooling device 4, a cooling input side thermometer 7 is disposed. In the present embodiment, each of the 20 thermometers can measure the temperature above and below the steel sheet 1. Fig. 2 is a view showing an example of the internal configuration of the cooling device 4. In the interior of the cooling device 4, a plurality of roller groups 41 capable of transporting steel sheets are arranged, and in each of the cooling regions 1Z to 19Z, a nozzle group in which a plurality of sprayable cooling waters are arranged is disposed above and below the steel sheets (not Graphic). The cooling water injected from the nozzle group 200904558 is controlled by the thickness of the flow control plate or the length of the plate, and can be controlled according to the amount of steel. In the present embodiment, the number of zones or the injection side thermometer 7 of each nozzle is used. Cooling input is arranged on the input side of the seven-part device 4. The third figure shows the cooling water amount calculation plan including the schematic configuration of the control system of this meeting. The connection is: rolling control device 2〇. In the cooling water amount calculation device 100, the integrated controller and the raw material of each calender can perform the production manager including the calendering machine 2; the data input round-out = the coffee maker (four), such as ^ 10 15 Data, or for the cooling water meter two (10) output from the input of the person; and cold (four) Μ temperature Park In addition, the amount of cooling water is calculated 100, connected to the cooling water amount control device 500 'the cooling water amount control device 5〇 The tether system can control the flow rate control valve 501 of each of the cooling zones 1 to 19 of the cooling device 4 to control the amount of cooling water. In other words, the cooling water amount calculation device 进行 can be performed by the cooling water amount control device 5 based on the data input from the cooling wheel input side thermometer 7, the rolling control device 200, the production management device 3, the data input/output device 400, and the like. The calculation of the amount of cooling water controlled by 〇〇. In particular, in the cooling water amount calculation device 100 of the present embodiment, the cooling device 4 can be determined by transmitting the information on the amount of cooling water required for the cooling water amount control device 500 while conveying the steel sheet 1 ' after the finish rolling rolling. Water injection amount. More specifically, the cooling water amount calculation device 100 of the present embodiment includes a predetermined cooling program setting unit 101 that sets a predetermined cooling program of the steel plate 1 of the cooling device 4 in response to the target cooling end temperature 11 200904558 information; The transmission coefficient calculation unit 102 can obtain the heat transfer coefficient of the predetermined portion of the steel sheet 1 in the cooling device 4; and the upper and lower ratio calculation unit 103 can be based on the predetermined cooling program set by the predetermined cooling program setting unit 101. The heat transfer coefficient obtained by the heat transfer coefficient calculation unit 5 102 calculates the water amount density ratio reflected on the upper and lower surfaces of the cooling water amount control device 500. Fig. 4 is a flow chart showing an example of a procedure for determining the amount of cooling water by the cooling water amount calculating device 100 in the present embodiment. In step S401, the predetermined cooling program setting unit 101 sets a predetermined cooling program of the cooling device 104 for the steel sheet 1. Specifically, the surface temperature of the steel sheet 1 measured by the cooling input side thermometer 7 was measured, and the temperature distribution in the thickness direction of each section at the time before cooling was determined. It is known that the temperature distribution in the thickness direction is the parabola having the highest temperature in the middle of the thickness direction. Further, the method of obtaining the temperature 15 distribution in the thickness direction from the surface temperature can determine the temperature distribution at 11 o'clock in the thickness direction by using the method disclosed in Japanese Patent Publication No. Hei 7-41303 (see Fig. 7). If the outline is explained, the upper surface temperature 1 > is the measured temperature, and the temperature difference AT between the upper surface and the highest temperature of the plate temperature is calculated by the following formula (1). AT=33.8 — 3_63h ( -0.0371 + 0.00528h) · TF... (1) 20 AT : Temperature difference between the upper surface and the highest temperature of the plate temperature, h : plate thickness. The lower surface temperature TL is calculated according to the following formula (2). TL= TF +Κ]ξ ( ATScon+ATSclass ) +K2··· (2) ξ : Temperature conversion coefficient obtained by learning, ATS: temperature difference between the upper and lower sides of the input side obtained by learning, K!, K2: Adjustment factor decision.决 12 200904558 The parabolic temperature distribution satisfying the above conditions is determined, and the temperature distribution in the thickness direction is determined. Further, the temperature distribution in the thickness direction of each zone at the time before cooling is taken as an initial value, and the thickness direction is divided into 5 appropriate lengths (for example, 11 points) according to the required control precision, and is used as a calculation target point. The heat transfer difference equation is used to calculate the temperature transition from the cooling device 4 to the cooling open position. The average thickness Tsk* of the respective regions of the cooling start position of the cooling device 4 is calculated (hereinafter referred to as "cooling start temperature Tsk*". , k is the thickness direction index)' as the cooling start temperature information. A method for analyzing the temperature transition by solving the heat transfer differential equation 10 is also disclosed, for example, in Japanese Patent Publication No. Hei 7-41303, which is summarized as follows, and the representative point on the board is based on the initial temperature distribution state in the thickness direction. 11 points are calculated as the calculation target point, and are calculated according to the first heat transfer difference equation shown by the following formula (3). (j)t+At=Q(1)t +At · (λ』+ ! - 2λ"· +λ| -1 )/ρ · Δχ2 〜1 ” 15 AQs = 4.88[[(Tg + 273)/100]4 - [ (T(j) + 273)/100]4 ](j = i ,ll) = 〇(j = 2~10)...(3) Q(j)t : the heat content of element j at time t, T( j): indicates the same temperature, Δι : fixed time of differential calculation (=const, 150msec), p: density, person: heat transfer rate of element j 'Tg. temperature 'AQS: boundary condition, Αχ: plate thickness division 20 thick At this time, when the plate temperature Τ is converted into heat Q, if Τ > 880, then Q = 3.333 + 0.16T, and if TS 880, then Q = - 149.05 + 0.481 · - 1 _68xl0-4 . T2 ; When Q is transformed into temperature T (including heat: the value obtained by integrating specific heat), 25 if Q > 144_13, then T = -20_8 + 6.25xQ, 13 200904558 If 0 < QS144.13, then T = 1431.5 -, ( 1. 162xl06 - 5.95x 103xQ) The predetermined cooling program setting unit 101 calculates the passage time (TMz) and the cooling predicted temperature 5 (Tsk) of each zone based on the cooling passage speed of each zone (1Z to 19Z). Here, the cooling predicted temperature (Tsk) is as shown in Fig. 10, indicating that the division of each zone is The input side temperature of one part of the section. The cooling passage rate is obtained by the method of the position of the front end of the steel plate and the conveyance speed by the method described in Japanese Patent Publication No. 7-41303. As shown in Fig. 8, the steel plate is shown in Fig. 8. The position of the front end is taken as X. When the conveying speed 10 at this time is V(x), the plate is located at the k point of the inlet of the cooling device, in other words, the water cooling time at a point X from the front end of the steel plate is: t( x) = ί -dx x+Lzone V(x) Next, the water cooling time tt tm and tb 0 15 of the front end, the center, and the end portion are obtained by the following equation.
Lzone 0 V⑴ -dx • L/2 +fz〇ne } 〇 v〇〇 dx L+fc 0 να) -dx 20 L :板長，V(x)= l/(ax2 + bx+c)，帶入前述3式，求 出 a、b、c。 L2· izone r(t t +t b -2t L2·彳 zone _{L(2t 3t, +t, m -) + feone(t t +tb-2tm)} 14 200904558 1 Ί 3t +Π c = irw{Ltt+w*L( 4 加速範圍（X之定義區威)係依下式而定。 5 L + lzone+ Δΐ〇2 L :板長，lz〇ne :有效冷卻區長，A1c2 :(餘複合體= const)。 藉由以上，在預定之加速範圍内適當的定出X’代入V(x) 之式’作成鋼板前端之位置與該時點之搬送組(速度模式）。 10然後，將前述運算結果輸出至通過速度控制裝置(未圖示）。 如上述般求出加速率，係因為一面搬送鋼板1、一面進 行冷卻時，鋼板前端部與末端部進入冷卻裝置4的時間會不 一樣。亦即，由於沿著鋼板的長方向，冷卻開始溫度會有 所不同，所以前端部與末端部冷卻後的溫度也會不同，為 15 了使各種製品材質橫貫全長的溫度皆可均一，藉由隨著向 末端部前進而加速鋼板通過速度而可進行修正。藉由以 上，可得到至冷卻結束目標溫度為止的冷卻程序。 接著，在步驟S402中，熱傳係數計算部1〇2從各區基準 水量密度，選擇對應於計算對象區2之基準水量密度，代入 20冷卻下部水量密度(WDLi)。在此，決定各區之基準水量密 度的方法，可使用例如特公平7_41303號公報所示之由商業 電腦所傳送之值來決定等方法。 然後，在步驟S403中，熱傳係數計算部1〇2將冷卻預測 溫度(Tsk)作為初始值，進行熱傳遞差分計算，計算鋼板裏 15 200904558 面溫度(TLi)。在此’區域iz之最初的反覆運作之Tsk值係「冷 卻開始溫度Tsk*」，該值以外之反覆運作計算結果為Tsk。 然後，由已計算之冷卻下部水量密度(WDLi)與鋼板裏面溫 度(TLi)求出下部熱傳係數(aLi)。關於鋼板裏面溫度(TLi)， 5以前述之特公平7-41303號公報為例，可以j=ll進行計算。 第10圖係顯示本實施型態之冷卻溫度推移的特性圖。 如第10圖所示，鋼板裏面溫度(TLi)係顯示例如區域12 内之1反覆運作的輸入側裏面溫度。計算鋼板裏面溫度(TLi) 時，將冷郃預測溫度(Tsk)作為初始值，進行熱傳遞差分計 10异，以各反覆運作來進行鋼板裏面溫度(TLi)的計算。 關於計算下部熱傳係數(a U)的方法，參照第5圖於後進 行詳細說明。 一般而言’熱傳係數(〇0係由水量密度WD(m3/m2· 分）、表面溫度Ts所決定之非線性函數，已提出各種方程 15式。例如，提出了以下式子。Lzone 0 V(1) -dx • L/2 +fz〇ne } 〇v〇〇dx L+fc 0 να) -dx 20 L : plate length, V(x)= l/(ax2 + bx+c), bring in In the above formula 3, a, b, and c are obtained. L2· izone r(tt +tb -2t L2·彳zone _{L(2t 3t, +t, m -) + feone(tt +tb-2tm)} 14 200904558 1 Ί 3t +Π c = irw{Ltt+ w*L (4 acceleration range (X defined zone) depends on the following formula. 5 L + lzone+ Δΐ〇2 L : plate length, lz〇ne: effective cooling zone length, A1c2 : (co-complex = const By setting X' to V(x) in the predetermined acceleration range, the position of the front end of the steel plate and the transfer group (speed mode) at that time are created. 10 Then, the above calculation result is output. The speed control device (not shown) is used to determine the acceleration rate as described above. When the steel sheet 1 is conveyed while being cooled, the time at which the front end portion and the end portion of the steel sheet enter the cooling device 4 is different. Since the cooling start temperature varies depending on the longitudinal direction of the steel sheet, the temperature after cooling of the front end portion and the end portion is also different, so that the temperature of each product material can be uniform throughout the entire length, with The end portion advances to accelerate the steel sheet passing speed and can be corrected. With the above, the target temperature to the end of cooling can be obtained. Next, in step S402, the heat transfer coefficient calculating unit 1〇2 selects the reference water amount density corresponding to the calculation target region 2 from each zone reference water amount density, and substitutes 20 to cool the lower water amount density (WDLi). Therefore, the method of determining the reference water amount density of each zone can be determined by, for example, a value transmitted by a commercial computer as shown in Japanese Patent Publication No. 7_41303. Then, in step S403, the heat transfer coefficient calculation unit 1〇2 The cooling predicted temperature (Tsk) is taken as the initial value, and the heat transfer differential calculation is performed to calculate the surface temperature (TLi) of the steel sheet 15 200904558. The initial value of the Tsk value of the 'area iz' is the "cooling start temperature Tsk*". The result of the repeated operation calculation other than this value is Tsk. Then, the lower heat transfer coefficient (aLi) is obtained from the calculated lower water volume density (WDLi) and the inside temperature of the steel sheet (TLi). Regarding the inside temperature of the steel sheet (TLi), 5 Taking the above-mentioned Japanese Patent Publication No. Hei 7-41303 as an example, the calculation can be performed by j = 11. Fig. 10 is a characteristic diagram showing the cooling temperature transition of this embodiment. As shown in Fig. 10, the inside temperature of the steel plate is shown. (TLi) shows, for example, the temperature inside the input side in which the inside of the region 12 is repeatedly operated. When calculating the temperature inside the steel sheet (TLi), the cold heading predicted temperature (Tsk) is used as an initial value, and the heat transfer differential meter is different. The calculation of the temperature inside the steel sheet (TLi) is carried out in reverse. The method for calculating the lower heat transfer coefficient (a U) will be described in detail later with reference to Fig. 5. In general, the heat transfer coefficient (〇0 is a nonlinear function determined by the water amount density WD (m3/m2·min) and the surface temperature Ts) has been proposed in various equations. For example, the following formula has been proposed.
Log(a) = A + B*Log(WD) +C*TS+D· · .(4) 由於熱傳係數(a)會因為水沸騰型態的不同而相異，故 關於(4)式之係數a ' B、c、D，一般係如以下，以表面溫 度將前述(4)式進行係數分別。 20 Ts^Kl->Al ' B1 > Cl ' D1Log(a) = A + B*Log(WD) +C*TS+D· · . (4) Since the heat transfer coefficient (a) differs depending on the boiling state of the water, the formula (4) The coefficients a ' B, c, and D are generally as follows, and the coefficients of the above formula (4) are respectively subjected to coefficients at surface temperatures. 20 Ts^Kl->Al ' B1 > Cl ' D1
Ts < Kl^> A2 ' Β2 ' C2 ' D2 又，由於上表面與下表面一般會產生冷卻水滯留狀態 的差，故進行係數分別係為通例。因此，採用前述(4)之基 本式的例子，分別使用以下的係數組，而計算熱傳係數。 16 200904558 例如’關於上部熱傳係數計算用的係數，為：Ts <Kl^> A2 ' Β2 ' C2 ' D2 Further, since the upper surface and the lower surface generally cause a difference in the state of the cooling water retention state, the coefficient of progress is a general example. Therefore, using the example of the basic formula of the above (4), the heat transfer coefficient is calculated using the following coefficient sets, respectively. 16 200904558 For example, the coefficient for calculating the upper heat transfer coefficient is:
Tsu^Klu—Alu、Blu、Clu、Dlu u A2u、Β2υ、02υ、D2u。又，關於下部 熱傳係數計算用之係數，為： 5 Tsl^K1l—A1L、B1L、C1L、D1L、 tsl<kil—A2l、B2l、C2l、D2l。根據前述想法，以 第5圖進行說明。 第5圖係顯示本實施型態中，鋼板裏面溫度與下部熱傳 係數之關係的特性圖。 1〇 在第5圖中，顯示WDL㈣.3、〇.8、2·0時之鋼板襄面溫 度與熱傳係數間之關係的曲線。 例如’ WDLi=0_8時，若計算出鋼板裏面溫度(Tu)之 值’則可求出對應於WDLi=0.8之曲線上座標5〇1的丫座標 (aLl)。另外，事先記憶有因冷卻下部水量密度(WDLi)之數 15值而異的複數曲線圖案，而未記憶已計算的冷卻下部水量 密度(WDLi)的曲線圖⑽，使用最接近之數值的曲線圖 案。因此，為了提高計算精準度，希望可以記憶較多的曲 線圖案。 接著，在步驟S404中，上下比計算部1〇3使用在步驟 20 S403所計算之下部熱傳係數（aLi)，計算冷卻上部水量 (WDUi) ’並計算前述反覆計算之適當上下比(ηί)。 然後，參照第6圖說明冷卻上部水量密度(评〇叫的計 算方法。 第6圖係本實施型態中’顯示鋼板表面溫度(TUi)與上 17 200904558 部熱傳係數(aUi)間之關係的圖。 在本實施型態中，探求通過鋼板表面溫度(TUi)=鋼板 裏面溫度(TLi)、上部熱傳係數(aUi)=下部熱傳係數(aLi)之 座標601的曲線，並取得冷卻上部水量密度(WDUi)。與冷 5 卻下部水量密度(WDLi)—樣，也記憶有複數冷卻上部水量 密度(WDUi)的曲線圖案，但未記憶所對應之曲線圖案時， 直接計算冷卻上部水量密度(WDUi)。 接著，參照第9圖及第11圖’說明冷卻上部水量密度 (WDUi)的計算方法。 10 如第9圖所示，一面變化冷卻水量密度WDU，一面探 求計算出上部熱傳係數(aUi)會與下部熱傳係數(aLi)相同 的冷卻上部水量密度(WDUi)。 第11圖係顯示本實施型態中，上下比計算部103計算冷 卻上部水量密度(WDUi)之步驟的流程圖。 15 在步驟S1101中，判定上部標準熱傳係數(a〇)是否與丁 部熱傳係數(aLi)為一致。在此，上部標準熱傳係數(aG)係指 對應於標準水量密度(WDU*)之非基準面熱傳係數，係藉由 前述之(4)式來進行計算。又，標準水量密度(WDU*)係事先 記憶而作為資料。 20 前述判定結果若為一致時，WDUi=WDU*，則結束計 算。另一方面，若步驟Sii〇l之判定結果不一致時，則在步 驟S1102判定上部標準熱傳係數(叫)是否大於下部熱傳係數 (aLl)°前述判定結果若上部標準熱傳係數(aQ)大於下部熱傳 係數(aLi)時，則跳至步驟S1106。另一方面，步驟S1102之 18 200904558 判定結果若上部標準熱傳係數(α〇)小於下部熱傳係數(aLi) 時，前進至步驟S1103。 接著，在步驟S1103中，將k追加1(從步驟sn〇2前進時 設让=0)，計算\¥01^+1=\¥014+4\^(1^0)。在此，設％01；14及 5 AWk 為： AWk= | WDUk-WDUk., I /2 (k>l), WDU。= WDU、AW0=S (S:定數）。 接著’在步驟S1104中，判定步驟sii〇3所計算之對應 於WDUk+,的熱傳係數（ak+1)與下部熱傳係數(aU)是否一 10致。前述判定結果若為一致時，則在步驟su〇5中，判定前 述計算之熱傳係數(ak+1)是否大於下部熱傳係數(aU)。 前述判定結果若前述所計算之熱傳係數(ak+i)小於下 部熱傳係數(aLi)時，則回到步驟sn〇3，追加，再度進 行同樣的計算。另-方面’當步驟SUG5之判定結果為前述 15 (ak+i)大於前述(aLi)時，則前進至步驟su〇6。 然後，在步驟S1106中，對於k追加丨(從步驟“丨⑽前進 時設k=0)，計算WDUk+1=WDUk〜/vWk。接著，在步驟叫们 中，判定在步驟S1106所計算之對應於WDUk+|的熱傳係數 (ak+丨）是否與aLi —致，當判定結果為—致時， 20 WDUi=WDUk+1 ’則、结束計算。另一方面，當步驟sii们判 定之結果不為一致時，則在步驟S1108中判㈣是否小於 aLi。 當前述判定之結果為前述所計算之熱傳係數(a㈠大 於前述下部熱傳係數(aLi)時，回到步驟sn〇6，對於^匕追 19 200904558 樣計算。另一方面，當步 =果為㈣ak+1)小於前述(aLl)時，則前進至步 疋 5 止 對於值k再追加卜再度進行同樣的計算。如上所述古 前述計算之熱傳係數(〜）與 ^ ’直到 止，反覆騎計算。 ‘、、、㈣數(’-致為 另外’在本實施《中，在冷卻裝請始進行^ 時，係以鋼板表面溫度與鋼板裏面溫度大致相:部 關板表面溫度⑽)，衫心度(tLi)㈣行計^， 疋，例如，在冷卻裝置4進行 但 10 15 20 算前述熱傳遞差分方程式二==會， 溫度之間產生誤差。此時，為了對於區域ιζ :傳遞差分方程式而進行微調，也可參酌前述所計算= 然後，藉由計算冷卻上部水量密度(WDUi)，而 反覆運作之適當上下比。適當上 ： r|i=WDUi/WDLi。 、…马 接著，在步驟S4〇5中，上下比計算部1〇3判定 區之反覆運作是否全部結束。#前述判定結果為未 時，回到步驟S403,再度重複進行計算。另_方面，=步 驟S405之狀結果為e結树，前進至下個步驟s他。 關於重複運作順序，可任意設定，但將1重複運作時間 (TM )乘以重複運作次數⑴而計算闕時間(職)時 係决定重複運作:欠1^ΕΤΜ>τΜζ。 接者，在步驟S4〇6’上下比計算部1〇3計算各重複運作 20 200904558 將前述平均值作為最 之適當上下比(ηί)的平均值(AVE(r)i))， 後的區域適當上下比(ηΖ)。 然後，在步驟S407中，熱傳係數計算部1〇2判定未進行 計算之下-個區域是否存在。當前述判定結果為存在有= 5 一個區域時，回到步驟S402，再度進行計算以計算出下— 個區域之區域適當上下比(ηί)。另一方面，當步驟以〇7之判 定結果為不存在有下一個區域時，前述至下個步驟S408。 當所有的區域適當上下比之計算結束後，冷卻水量計 算裝置100將所有的區域適當上下比(ηζ)的資料發送至冷卻 10 水量控制裝置500，冷卻水量控制裝置500根據前述資料， 調整冷卻裝置4之流量控制閥501，使冷卻水流於各喷嘴。 藉此，在本實施型態中，在鋼板1之前端部分進入冷卻裝置 4之前，可使所有區域之冷卻水流出。Tsu^Klu—Alu, Blu, Clu, Dlu u A2u, Β2υ, 02υ, D2u. Further, the coefficients for calculating the lower heat transfer coefficient are: 5 Tsl^K1l - A1L, B1L, C1L, D1L, tsl < kil - A2l, B2l, C2l, D2l. Based on the foregoing ideas, description will be made in Fig. 5. Fig. 5 is a characteristic diagram showing the relationship between the inside temperature of the steel sheet and the heat transfer coefficient of the lower portion in the present embodiment. 1〇 In Fig. 5, the relationship between the surface temperature of the steel sheet and the heat transfer coefficient at WDL (4).3, 〇.8, and 2·0 is shown. For example, when WDLi = 0_8, if the value of the temperature inside the steel sheet (Tu) is calculated, the 丫 coordinate (aL1) corresponding to the coordinate 5〇1 of the curve of WDLi = 0.8 can be obtained. In addition, a complex curve pattern differing by the number 15 of the cooling lower water density (WDLi) is stored in advance, and the calculated cooling lower water density (WDLi) curve (10) is not memorized, and the curve pattern of the closest value is used. . Therefore, in order to improve the calculation accuracy, it is desirable to memorize more curved patterns. Next, in step S404, the upper-lower ratio calculating unit 1〇3 calculates the lower-stage heat transfer coefficient (aLi) calculated in step S403, calculates the cooling upper water amount (WDUi)', and calculates the appropriate up-down ratio (ηί) of the above-described repeated calculation. . Then, referring to Fig. 6, the calculation of the upper water volume density (the calculation method of the squeaking) is shown in Fig. 6. Fig. 6 shows the relationship between the surface temperature (TUi) of the steel sheet and the heat transfer coefficient (aUi) of the upper 17 200904558 in this embodiment. In the present embodiment, the curve of the coordinate 601 passing through the steel sheet surface temperature (TUi) = steel plate inner temperature (TLi), upper heat transfer coefficient (aUi) = lower heat transfer coefficient (aLi) is sought and cooled. The upper water density (WDUi) is similar to the cold 5 but the lower water density (WDLi), and also stores the curve pattern of the multiple cooling upper water density (WDUi), but when the corresponding curve pattern is not memorized, the cooling upper water amount is directly calculated. Density (WDUi) Next, the calculation method of the cooling upper water amount density (WDUi) will be described with reference to Fig. 9 and Fig. 11'. 10 As shown in Fig. 9, while changing the cooling water amount density WDU, the upper heat transfer is calculated. The coefficient (aUi) is the same as the lower heat transfer coefficient (WDUi) of the lower heat transfer coefficient (aLi). Fig. 11 is a view showing the step of calculating the upper water volume density (WDUi) by the upper and lower ratio calculating unit 103 in the present embodiment. Flow chart. 15 In step S1101, it is determined whether the upper standard heat transfer coefficient (a〇) is consistent with the butt heat transfer coefficient (aLi). Here, the upper standard heat transfer coefficient (aG) is corresponding to the standard water volume density (WDU*). The non-reference surface heat transfer coefficient is calculated by the above formula (4). Further, the standard water volume density (WDU*) is previously stored as data. 20 If the above judgment results are identical, WDUi=WDU*, Then, if the determination result of step Sii〇1 is inconsistent, it is determined in step S1102 whether the upper standard heat transfer coefficient (called) is greater than the lower heat transfer coefficient (aLl). If the coefficient (aQ) is greater than the lower heat transfer coefficient (aLi), the process jumps to step S1106. On the other hand, the result of the determination of the upper standard heat transfer coefficient (α〇) is lower than the lower heat transfer coefficient (aLi). Proceed to step S1103. Next, in step S1103, k is added to 1 (set from step sn2 to advance = 0), and \¥01^+1=\¥014+4\^(1^0) is calculated. Here, let %01;14 and 5 AWk be: AWk= | WDUk-WDUk., I /2 (k>l), WDU.= WDU, AW0=S (S: Then, in step S1104, it is determined whether the heat transfer coefficient (ak+1) corresponding to WDUk+ calculated in step sii3, and the lower heat transfer coefficient (aU) are one or so. In the case of coincidence, in step su〇5, it is determined whether the aforementioned calculated heat transfer coefficient (ak+1) is greater than the lower heat transfer coefficient (aU). If the heat transfer coefficient (ak+i) calculated as described above is smaller than the lower heat transfer coefficient (aLi), the result of the determination is returned to step sn3, and the same calculation is performed again. On the other hand, when the result of the determination in step SUG5 is that the above 15 (ak+i) is larger than the above (aLi), the process proceeds to step su〇6. Then, in step S1106, 丨 is added for k (k=0 is set from the step "(10) forward), and WDUk+1 = WDUk 〜 / vWk is calculated. Next, in the step call, it is determined that it is calculated in step S1106. Corresponding to whether the heat transfer coefficient (ak+丨) of WDUk+| is consistent with aLi, when the result of the determination is -, 20 WDUi=WDUk+1 ', the calculation is ended. On the other hand, when the result of step sii is not determined If they are identical, it is judged whether or not (4) is smaller than aLi in step S1108. When the result of the foregoing determination is the aforementioned calculated heat transfer coefficient (a (a) is greater than the lower heat transfer coefficient (aLi), return to step sn6, for ^ On the other hand, when the step = fruit is (4) ak+1) is smaller than the above (aLl), then proceed to step 5 and then perform the same calculation for the value k and then add the same calculation. The heat transfer coefficient (~) and ^' calculated above are calculated until the end of the ride. ',,, (4) number ('--for the other' in this implementation, when the cooling installation begins, ^ is the steel plate The surface temperature is approximately the same as the temperature inside the steel plate: the surface temperature of the closing plate (10), and the core (tLi) (4) Rows, 疋, for example, in the cooling device 4, but the above-mentioned heat transfer difference equation 2 == will occur, and an error occurs between the temperatures. At this time, in order to fine-tune the region ιζ: transfer the difference equation, It can also be calculated as described above = then, by calculating the cooling upper water density (WDUi), the appropriate upper and lower ratios of the operation are repeated. Appropriately: r|i=WDUi/WDLi., ..., then, in step S4〇5 The upper/lower ratio calculating unit 1〇3 determines whether or not the overlapping operation of the determination area is all completed. # If the determination result is not satisfied, the process returns to step S403, and the calculation is repeated again. In addition, the result of step S405 is an e-tree. Go to the next step s. Regarding the repeat operation sequence, you can set it arbitrarily, but multiply the 1 repetitive operation time (TM) by the number of repetitive operations (1) and calculate the 阙 time (job) to decide to repeat the operation: owe 1^ΕΤΜ> Μζ , 接 计算 在 ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' 2009 2009 2009 2009 2009 2009 2009 2009 2009 2009 2009 2009 2009 2009 2009 2009 2009 The area is properly up and down (ηΖ). Then, in step S407, the heat transfer coefficient calculation unit 1〇2 determines whether or not the area under the calculation is not present. When the foregoing determination result is that there is an area of = 5, the process returns to step S402, and the calculation is performed again to calculate. The area of the area is appropriately up-and-down ratio (ηί). On the other hand, when the step is determined by the result of 〇7 as the absence of the next area, the foregoing step to the next step S408. When all the areas are properly compared After the calculation is completed, the cooling water amount calculation device 100 transmits the data of the appropriate up-and-down ratio (ηζ) of all the areas to the cooling water quantity control device 500, and the cooling water amount control device 500 adjusts the flow rate control valve 501 of the cooling device 4 based on the above-described data. Cooling water flows to each nozzle. Thereby, in the present embodiment, the cooling water of all the regions can be made to flow out before the front end portion of the steel sheet 1 enters the cooling device 4.
在步驟S408中，預定冷卻程序設定部101判定由冷卻輸 15入側溫度計7所測定溫度的部分是否已為鋼板1之末端部 分。前述判定結果為鋼板1之末端部分時，結束全部的處 理。另一方面，若步驟S408之判定結果為祚鋼板1之末端部 分時，回到步驟S401，對於鋼板1之下一個部分’取得新的 冷卻程序。 20 如前所述，為了使沿著鋼板1全長之製品材質為均一， 會使鋼板通過速度向末端部而加快。因此，鋼板1之冷部程 序會依鋼板1之位置而不同。所以，在本實施塑態中，可將 鋼板1分成複數部分，而依各部分取得冷卻程序。 在本實施型態中，由於如前所述，決定冷卻上部水量 21 200904558 密度(WDUi)及冷卻下部水量密度(WDLi)，故可簡化為了將 鋼板1冷卻至事先預定之冷卻結束溫度、控制從冷卻裝置4 之上下面所喷射的冷卻水量而需要的計算量。藉此，可在 鋼板1之前端部分進入冷卻裝置4之前，在全部區域1Z〜19Z 5 流通冷卻水，而可將鋼板形狀的惡化抑制到最小。 (本發明之其他實施例） 具體而言，前述實施型態之冷卻水量計算裝置100係由 包含CPU、RAM、ROM等電腦裝置或電腦系統所構成者。 因此，為了實現本發明之各種機能處理，而安裝於電腦之 10 電腦程式本身也屬於本發明。 又，前述實施型態不過是實施本發明之具體化例子， 不能根據前述而限定解釋本發明的技術範圍。亦即，只要 不脫離本發明的技術思想或其主要特徵，即可以各種形式 實現本發明。 15 產業上利用之可能性 根據本發明，由於係根據設置於前述冷卻裝置進入側 之溫度計測量前述鋼板通過前述冷卻裝置内部時之溫度的 測量值，運算關於前述冷卻裝置内部之複數位置中，將前 述鋼板冷卻至預定溫度所需之冷卻條件而設定預定冷卻程 20 序，並且從前述所設定之預定冷卻程序的溫度、及可冷卻 前述鋼板之一面之冷卻水的第1冷卻水量密度，計算出顯示 熱傳導容易度之熱傳係數，並從前述計算出之熱傳係數， 計算出可冷卻前述鋼板之另一面之冷卻水的第2冷卻水量 密度，再根據前述第1冷卻水量密度與前述第2冷卻水量密 22 200904558 度之上下比，控制可冷卻通過前述冷卻裝置内部之鋼板的 冷卻水量，故可簡化為了將鋼板冷卻至事先預定之冷卻結 束溫度為止而需控制噴射自冷卻裝置上下面之冷卻水量所 需的計算置。猎此^由於可大幅縮短得到前述所需計鼻結 5 果為止的時間，故可大幅縮短從進行前述鋼板之溫度測定 至實際開始冷卻為止的期間。因此，可將前述進入側之溫 度計設置於前述冷卻裝置的正前方，並且可實現水量上下 比誤差較少的冷卻處理過程，而可抑制鋼板形狀變形。 I：圖式簡單說明3 ίο 第1圖係顯示本發明第1實施型態之鋼板製造線之一例 的圖。 第2圖係顯示本發明第1實施型態中之冷卻裝置之内部 構成例的圖。 第3圖係顯示本發明第1實施型態中之包含冷卻水量計 15 算裝置之控制系統之概略構成例的方塊圖。 第4圖係顯示藉由本發明第1實施型態之冷卻水量計算 裝置決定冷卻水量之步驟之一例的流程圖。 第5圖係顯示本發明第1實施型態中鋼板裏面溫度與下 部熱傳係數間之關係的圖。 20 第6圖係顯示本發明第1實施型態中鋼板表面溫度與上 部熱傳係數間之關係的圖。 第7圖係顯示板厚方向之11點之溫度分布的圖。 第8圖係顯示通過冷卻裝置之鋼板位置的圖。 第9圖係顯示本發明第1實施型態中探求冷卻上部水量 23 200904558 密度之方法的圖。 第10圖係顯示本發明第1實施型態中之冷卻溫度推移 之一例的特性圖。 第11圖係顯示本發明第1實施型態之上下比計算部計 5 算冷卻上部水量之步驟之一例的流程圖。 【主要元件符號說明】 1...鋼板 100...冷卻水量計算裝置 2...精軋壓延機 101...預定冷卻程序設定部 3".墙0¾¾ 102…熱傳係數計算部 4...冷卻裝置 103...上下比計算部 5...精軋前面溫度計 200...壓延控制裝置 6...精軋輸出側溫度計 300...生產管理裝置 7…冷卻輸入側溫度計 400…資料輸入輸出裝置 41…報群 500…冷卻水量控制裝置 1Z〜19Z...冷卻區 501...流量控制閥 24In step S408, the predetermined cooling program setting unit 101 determines whether or not the portion of the temperature measured by the cooling input/output side thermometer 7 is the end portion of the steel sheet 1. When the result of the above determination is the end portion of the steel sheet 1, the entire treatment is terminated. On the other hand, if the result of the determination in step S408 is the end portion of the stencil sheet 1, the process returns to step S401, and a new cooling program is acquired for the lower portion ' of the steel sheet 1. 20 As described above, in order to make the material of the entire length of the steel sheet 1 uniform, the speed of the steel sheet is increased toward the end portion. Therefore, the cold portion of the steel sheet 1 differs depending on the position of the steel sheet 1. Therefore, in the plastic state of the present embodiment, the steel sheet 1 can be divided into a plurality of portions, and a cooling process can be obtained for each portion. In the present embodiment, since the upper water amount 21 200904558 density (WDUi) and the cooling lower water amount density (WDLi) are determined as described above, it is possible to simplify the cooling of the steel sheet 1 to a predetermined cooling end temperature, and control from The amount of calculation required for the amount of cooling water injected above and below the cooling device 4. Thereby, the cooling water can be circulated in all the regions 1Z to 19Z 5 before the front end portion of the steel sheet 1 enters the cooling device 4, and deterioration of the shape of the steel sheet can be suppressed to a minimum. (Other Embodiments of the Present Invention) Specifically, the cooling water amount calculation device 100 of the above-described embodiment is constituted by a computer device such as a CPU, a RAM, or a ROM, or a computer system. Therefore, the computer program itself installed on the computer in order to realize the various functional processing of the present invention also belongs to the present invention. Further, the foregoing embodiments are merely examples of the implementation of the present invention, and the technical scope of the present invention cannot be construed as limited to the foregoing. That is, the present invention can be implemented in various forms without departing from the technical idea of the present invention or its main features. 15 Industrial Applicability According to the present invention, since the measured value of the temperature of the steel sheet passing through the inside of the cooling device is measured based on a thermometer provided on the inlet side of the cooling device, the calculation of the plurality of positions in the interior of the cooling device will be The predetermined cooling step 20 is set by cooling the steel sheet to a cooling condition required for a predetermined temperature, and is calculated from the temperature of the predetermined cooling program set and the first cooling water amount density of the cooling water that can cool one surface of the steel sheet. a heat transfer coefficient showing the ease of heat conduction, and calculating a second cooling water amount density of the cooling water that can cool the other side of the steel sheet from the heat transfer coefficient calculated as described above, and based on the first cooling water amount density and the second The cooling water volume ratio 22 is higher than the upper limit of 200904558 degrees, and the cooling water amount of the steel sheet passing through the inside of the cooling device can be controlled, so that it is possible to simplify the cooling of the upper and lower sides of the cooling device in order to cool the steel sheet to a predetermined cooling end temperature. The calculation required for the amount of water. Since this time can be greatly shortened, the period from the measurement of the temperature of the steel sheet to the actual start of cooling can be greatly shortened. Therefore, the temperature meter of the aforementioned entry side can be disposed directly in front of the above-described cooling device, and a cooling process in which the water amount is less than the upper limit error can be realized, and the shape deformation of the steel sheet can be suppressed. I. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an example of a steel sheet manufacturing line according to a first embodiment of the present invention. Fig. 2 is a view showing an example of the internal configuration of a cooling device in the first embodiment of the present invention. Fig. 3 is a block diagram showing a schematic configuration example of a control system including a cooling water gauge 15 in the first embodiment of the present invention. Fig. 4 is a flow chart showing an example of a procedure for determining the amount of cooling water by the cooling water amount calculating device according to the first embodiment of the present invention. Fig. 5 is a view showing the relationship between the inside temperature of the steel sheet and the heat transfer coefficient of the lower portion in the first embodiment of the present invention. Fig. 6 is a view showing the relationship between the surface temperature of the steel sheet and the upper heat transfer coefficient in the first embodiment of the present invention. Fig. 7 is a view showing the temperature distribution at 11 o'clock in the thickness direction. Figure 8 is a diagram showing the position of the steel plate passing through the cooling device. Fig. 9 is a view showing a method of detecting the density of the upper water amount 23 200904558 in the first embodiment of the present invention. Fig. 10 is a characteristic diagram showing an example of the cooling temperature transition in the first embodiment of the present invention. Fig. 11 is a flow chart showing an example of the procedure of calculating the upper water amount by the calculation unit in the first embodiment of the present invention. [Description of main component symbols] 1...Steel plate 100...Cooling water amount calculation device 2: Finish rolling calender 101...Predetermined cooling program setting unit 3". Wall 03⁄43⁄4 102... Heat transfer coefficient calculation unit 4. .. Cooling device 103...Upper/down ratio calculating unit 5: Finishing front thermometer 200... Rolling control device 6: Finishing output side thermometer 300... Production management device 7... Cooling input side thermometer 400 ...data input/output device 41...report group 500...cooling water amount control device 1Z to 19Z...cooling zone 501...flow control valve 24