普碳鋼板材矯直機的設計
普碳鋼板材矯直機的設計,鋼板,矯直機,設計
ABSTRACT
There are provided an even number of paired roll-shift type rolling mills 12a,12b and a controller 16 for controlling the rolling mills 12a,12b.
Each of upper and lower work rolls 13 of each of the roll-shift type rolling mills has a predetermined crown curve and has a roll shifting mechanism 14 for axially shifting the upper and the lower work rolls relative to each other.
The controller 16 determines a shift amount of each rolling mill in order to obtain a predetermined cross section shape of a steel plate,shifts the work rolls of the rolling mill on the upstream side paired every rolling coil to thereby disperse wear on the roll surface,and moves the work rolls of the rolling mill on the downstream side of the pair in a predetermined direction by the same distance,thereby canceling the change in the cross section shape of the plate by the shifting operation for the wear dispersion.
摘要
有一對軋輥軸向移動式軋機12a,12b以及控制軋機12a,12b的控制器16。
每組軸向移動的軋輥機中的工作軋輥13的各自上邊緣與下邊緣都有預定的凸邊曲線,同時軋輥移位裝置14用以控制上下工作軋輥彼此間的軸向相對移動。
控制器16控制每一個軋機的位移量為了獲得鋼板的預定截面形狀,它通過移動軋機每組成對的軋輥中上邊的工作軋輥上的每組成對的軋輥以此來使軋輥的上下表面的離差,同時使軋機成對工作的下方的軋輥在預定的方向上移動同樣的距離,以此通過改變磨軋的離差的過程來撤銷板的截面形狀的變化。
1
HOT TANDEM ROLLING MILL
BACKGROUND OF THE INVENTION
1.Field Of The Invention
The present invention relates to a hot tandem rolling mill which can perform both shape control by shifting rolls and wear dispersion.
2.Related Background Art
A roll-shift type rolling mill schematically shown in FIG.1(for example,U.S. Pat.No.5,640,866,Janpanese Patent Laid-Open No.7-232202,and the like)is known as a roll mill used to obtain a very flat plate product.According to the roll-shift type rolling mill,upper and lower work roll 1 having convex and concave parts as shown in U.S.Pat.No.5,640,866 are alternately shifted in the axial direction of the rolls,and roll a plate member 2,thereby controlling the shape in cross section of the plate member.
On the other hand,in an ordinary hot finishing rolling mill,a rolling part of the surface of a roll is worn as the number of plates which are rolled increases.Especially,the end parts of the roll are worn morn than the center part.When a plate to be rolled next is wide,the cross section of the plate has a shape in which the both ends are thicker(those are called cat's ears) as schematically in FIG.2 and the rolled shape deteriorates.
1
熱連軋機
發(fā)明的背景
1、發(fā)明的領域
本發(fā)明與熱連軋機相關,它通過轉動軋輥以及磨軋離差來控制是板面的形狀。
2、相關技術背景
圖1所示的是軋輥滾動式軋機的原理簡圖(例如,U.S.Pat.No.5,640,866,Janpanese Patent Laid-Open No.7-232202等),它是用來獲取平鋼板產品的軋制設備。根據軋輥移動式軋機,工作輥1的上部和下部有如圖U.S.Pat.No.5,640,866凸、凹部分是在軸向尺寸交替變化的軋輥。軋制板面2可以控制整個板面的截面形狀。
另一方面,一個普通的完備的熱軋機中,軋輥表面軋制部分的外形的磨損是隨著已被軋制鋼板的數(shù)目越來越厲害。特別是,軋輥末端磨損大于中間部分。當下一個待軋鋼板很寬時,鋼板的橫截面會形成兩端厚的形狀(那些被形象地稱為貓耳朵)如簡圖2所示,同時這個卷形會變形。
In a conventional hot finishing rolling mill,therefore,the width of a plate cannot be freely changed and rolling operation is performed according to a predetermined operation schedule(called a coffin schedule)as shown in an example of FIG.3.According to the example of FIG.3,the axis of abscissa denotes the number of rolling coils after roll replacement and the axis of ordinate shows the rolling width of plates.In order to obtain a necessary plate width,rolling operation for narrow plates is repeated and the rolls are warmed,and plate members are rolled in accordance with the order of the wider plate members.Other various operation schedules are used according to hot finishing rolling lines.
在傳統(tǒng)的熱軋機,要求鋼板的寬度不可以隨意變動,根據預定的運行流程(所謂的密閉流程)軋制流程正如圖3的例圖所示。
根據圖3的例圖,軸的橫坐標表示通過軋制的軋輥數(shù)目,縱坐標代表軋板的軋制寬度。為了獲取一個需要的軋板寬度,軋制系統(tǒng)將窄軋板重復軋制,軋輥在軋制前要預熱。鋼板的軋制要按照寬鋼板的軋制順序。其他的各種軋制過程依據熱軋相關規(guī)則。
In the conventional hot finishing rolling mill,as mentioned above,since the rolling operation is performed according to a predetermined operation schedule,there is a problem that schedule-free rolling operation which is performed irrespective of the plate width cannot be executed.
上面提到的傳統(tǒng)的熱軋機,由于軋制操作是根據預定的操作流程來執(zhí)行的,那么將導致一個問題,即不考慮鋼板寬度的自由規(guī)程軋制過程降無法執(zhí)行。
Consequently,there has been proposed that the upper and lower work rolls are axially shifted relative to each other by using the above-mentioned roll-shift type rolling mill,thereby dispersing local wear of the surface of the roll and achieving the schedule-free rolling operation.In this case,however,since a shifting function is used to disperse the wear of the surface of the roll,there is a problem that an inherent control of the cross section shape cannot be performed.
因此,由已經提出的,上下工作輥根據上述的滾扎軋輥移動式軋機的原理,通過彼此相對的軸向移動,從而分散軋輥表面的磨軋,而實現(xiàn)自由規(guī)程軋制。然而在這種情況下,由于移動的運行使軋輥的表面離差產生,將導致一個不可避免的問題,即截面形狀的控制無法保證。
That is,hitherto,the function of shifting the upper and lower work rolls of the roll-shift type rolling mill in the axial direction is used to control the cross section shape of a steel plate.The shifting function is,however,used for dispersing the wear of the roll,so that the shape cannot be controlled.There is consequently a problem that the wear dispersion and the cross section shape control are incompatible.
這是迄今為止,通過利用軋輥移動式軋機的上下工作軋輥在軸向的移動功能來控制鋼板的截面形狀。然而,這個移動的功能是使軋輥相互錯位,以致無法控制形狀。因此,表面的形狀的不平整性和截面形狀的控制仍存在不相容性問題。
SUMMARY OF THE INVENTION
The present invention is provided in order to solve the problems.Therefore it is an object of the present invention to provide a hot tandem rolling mill which can realize both of schedule-free rolling operation by dispersing wear of the surface of the roll and a control of a cross section shape of a steel plate.
該發(fā)明的概括
現(xiàn)今的發(fā)明是為了解決問題。因此本連軋機的發(fā)明,在實現(xiàn)分散軋輥表面的離差的同時,又控制鋼板截面的面積而完成自由規(guī)程軋制。
According to the present invention,there is provided a hot tandem rolling mill having roll-shift type rolling mills of an even number which are paired and a controller for controlling the rolling mills.Each of upper and lower work rolls of each of the roll-shift type rolling mills has a predetermined crown curve.There is also provided a roll shifting mechanism for axially moving the upper and lower work rolls relative to each other.The controller determines a shift amount of each rolling mill in order to obtain a predetermined cross section shape of a steel plate,shifts the work rolls of the rolling mill on the upstream side of a pair by a predetermined amount by using the shift position as a center for every rolling coil to thereby disperse wear of the surface of the roll,and moves the work rolls of the rolling mill on the downstream side of the pair in a predetermined direction by the same distance.thereby canceling the change in the cross section shape of the plate caused by the shifting operation for the wear dispersion.
本發(fā)明所提供的熱連軋機,有兩個成對的軸向移動式軋機和控制軋機的控制器。每個軸向移動式軋機的上下工作輥都有預定的凸度曲線。也提供了使上下工作軋輥在軸向相對彼此的轉移機械裝置。該控制器控制每個軋機的移量為了獲得鋼板的預定橫截面形狀,它通過轉移位置作為中心改變軋機中的一對工作軋輥的上游移量用以分散軋輥的表面離差。同時移動一對下游軋機在工作軋輥在預定方向相同的距離。從而撤銷由磨損離差在移位操作過程中引起的板的截面形狀的改變。
According to the construction of the present invention,since rolling operation is performed by axially shifting the work rolls of the roll-shift type rolling mills of an even number which are paired by using the shift position determined to obtain a predetermined plate crown for every rolling coil,the wear of the surface of each roll can be dispersed.Further,by performing the rolling operation of the rolling mills on the upstream and downstream sides in a predetermined direction(for example,opposite direction or the same direction)by the same distance,the change in the cross section shape of the steel plate caused by the shifting operation to disperse wear occurring in the rolling mill on the upstream side can be canceled by the rolling mill on the downstream.Since the plate crown is controlled by changing the center position of the schedule-free rolling operation and the control of the cross section shape of the steel plate,that is,the plate crown control by the dispersion of the local wear of the roll surface can be compatibly performed.
根據本發(fā)明,軋制系統(tǒng)通過成對的軋機的工作軋輥的軸向移位,利用確定位置的轉變來獲得每個扎卷板預定的鋼板凸度,以及各個軋輥表面的離差可以被分離。此外,在軋機軋制系統(tǒng)預定方向(例如,相反的方向或同一方向)上的上、下游移動的同樣距離,由于發(fā)生在軋機在上游的移位操作的分散磨損所導致的鋼板截面的變化可以在軋機的下游所撤銷。由于板的凸度是由自由規(guī)程軋制系統(tǒng)的中心位置變動和鋼板截面形狀的控制的改變,即由軋輥表面的局部磨損離差所導致的板的凸度控制可以妥善地得到解決。
The other objects and advantageous feature of the present invention will become apparent from the following detailed description with reference to the appended drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG.1 is a schematic diagram showing a conventional roll-shift type rolling mill;
FIG.2 shows an example of a cross section shape of a plate due to wear of rolls;
FIG.3 shows an example of operating schedule in a conventional hot tandem rolling mill;
FIG.4 is a diagram showing the whole construction of a hot tandem rolling mill according to the present invention;
FIG.5 is s diagram explaining the principle of the present invention;
FIG.6A is a diagram showing a roll shift state of an odd-number stand according to the present invention;
FIG.6B is a diagram showing a roll shift state of an even-number stand according to the present invention;
FIG.7A is another diagram showing a roll shift state of an odd-number stand according to the present invention;
FIG.7B is another diagram showing a roll shift state of an even-number stand according to the present invention.
該發(fā)明的其他的結構以及特性將在下面附有注釋的簡圖中詳細列出。
例圖的簡要說明
圖1是常見的軋輥移位式軋機的原理圖;
圖2是由于軋輥的磨損,形成鋼板截面截面形狀的例圖;
圖3是普通的熱連軋機的工作機制直角坐標圖;
圖4根據該發(fā)明,描述的是該熱軋機的所有結構部件;
圖5是該發(fā)明的軋制原理圖;
圖6A根據該發(fā)明,描述的奇數(shù)軋輥軸向移動狀態(tài)的簡圖;
圖6B根據該發(fā)明,描述的偶數(shù)軋輥軸向移動狀態(tài)的簡圖;
圖7A根據該發(fā)明,描述的奇數(shù)軋輥軸向移動狀態(tài)的另一幅簡圖;
圖8B根據該發(fā)明,描述的偶數(shù)軋輥軸向移動狀態(tài)的另一幅簡圖;
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Embodiments of the present invention will be described hereinbelow with reference to the drawings.Common portion in the drawings are designated by the same reference numberals and repetition of the description is omitted.
首選方案的說明
該發(fā)明的方案會在下文隨例圖一起闡述。圖紙中共同的部分由相同的參數(shù)表示,重復的部分被省略。
FIG.4 is a diagram illustrating the whole construction of a hot tandem rolling mill of the present invention.In the diagram,a hot tandem rolling mill 10 of the invention has an even number of roll-shift type rolling mills 12a,12b which are paired(one pair is used in the diagram)and a controller 16 for controlling the rolling mills.In the diagram,other rolling mills 5 are regular ones which are not of the roll-shift type(for example,they are four-stage rolling mills).The whole rolling mills 5 perform tandem rolling operation to thereby obtain a predetermined percentage reduction in thickness.
圖4是闡述該發(fā)明——熱連軋機的結構圖。該圖中的熱連軋機10有兩個軸向移動式的軋機12a和12b,它們是成對的(在圖中有一對使用著),以及控制器16控制著軋輥的運動。圖中,其他的輥子5是不用于軸向移動的常規(guī)軋輥(它們是4階軋輥)。圖中所有的5#軋機通過執(zhí)行連軋操作使軋板在厚度上獲得預定的百分比減幅。
The present invention is not limited that the roll-shift type rolling mills 12a,12b are paired.Roll-shifting type rolling mills of four or larger even-number can be also used.Although it is preferable to arrange the pair of the rolling mills so as to be neighboring each other as shown in the diagram,the present invention is not limited to the arrangement.A rolling mill of a different type may be also interposed between the roll-shift type rolling mills 12 on the upstream side and the downstream side.
該連軋機的發(fā)明不僅僅局限于軸向移動軋輥僅為一對12a和12b。軸向移動的四輥或者更多的數(shù)目也可以應用。雖然本發(fā)明的一對12a和12b軋輥在圖上是相鄰分布的,其實該發(fā)明不限于圖上的分布。在軸向移動的軋機12上下游間可以設置與此不同類型的軋機。
Each of the upper and lower rolls 13 of each of the roll-shift type rolling mills 12a,12b has a predetermined crown curve for controlling the cross section shape of a plate.The rolling mill 12 has a roll-shifting mechanism 14 for axially shifting the upper and lower work roll 13 relative to each other.
每臺軸向移動軋機12a和12b的每個上下軋輥13都有預定的凸度路拱曲線來控制板的截面形狀。軋機12擁有軸向移位裝置14來控制上下工作軋輥13的相對各自的軸向移動。
The controller 16 determines a shift amount of each of the rolling mills 12a,12b in order to obtain a predetermined cross section shape of a steel plate and shifts the work rolls 13 of the rolling mill 12a on the upstream side of each pair every rolling coil by using the shift position as a center,thereby dispersing the wear on the roll surface.The controller 16 shifts the work rolls 13 of the rolling mill 12b on the downstream side of the pair in a predetermined direction(opposite or same direction)by the same distance correspond to the shift stroke of the rolling mill 12a,thereby canceling the change in the cross section shape of the plate by the shift for the wear dispersion.The roll-shifting mechanism 14 axially shifts the upper and lower work rolls 13 relative to each other in accordance with a control signal from the controller 16.
控制器16是控制軋機12a和12b各自的位移量以獲取鋼板預定的截面的形狀,控制器16通過利用各檔為中心改變上游軋機12a的工作軋輥的每對滾圈,從而分散輥的表面的磨軋。同時控制器16在預定的方向上(相同或相反的方向),改變在下游軋機12b的工作軋輥13相對應軋機12a的沖程的同樣距離,從而撤銷由表面離差在鋼板截面形狀上引起的改變。軸向轉移機制14依據控制器16傳來的信號控制著上下工作軋輥13相對各自的軸向位移。
FIG.5 is a diagram explaining the principle of present invention.FIG.6 is a diagram showing a roll-shifting state of the present invention in this case.In FIG.5,the axis of abscissa denotes the shift amount of the roll-shift type rolling mills 12a,12b.Corresponding rolling operations are shown by the same numbers(1,2,3,...)in the diagram.
圖5是本發(fā)明的原理圖。圖6是本發(fā)明的軋輥在相對移位狀態(tài)工作圖。圖5中,橫坐標代表的是軸向移位軋機12a和12b的位移量。相應的軋制操作在圖中由相同的數(shù)字(1,2,3,...)示出。
According to the example,the shift amounts of the rolling mills 12a,12b determined by the contronller 16 are,for example,+30mm and -30mm,respectively,although it is not necessary that the shift amount are equal.A shifting amount(oscillation amount)b in the axial direction for wear dispersion is set to,for example, ±75 mm.Further,the rolling mills 12b and 12a have the opposite shifting direction(oscillation directions)for wear dispersion.That is,in the hot tandem rolling mill 10,while oscillating within a range of ±150 mm,the plate crown control is performed by varying the oscillation center values A,B.
根據圖示,雖然不要求位移量相同,由控制器16控制的軋機12a,12b各自的位移量是+30mm到-30mm。在軸向的磨軋離差的位移(擺動位移)b為±75mm。而且,軋機12b和12a的你磨軋離差有相反的移動方向(擺動方向)。即該熱連軋機,有±150mm的擺動位移,軋板凸度控制是通過改變位于A,B間的擺動中心。
According to the above-mentioned construction of the invention,rolling operation is performed while axially shifting the work rolls 13 of the roll-shift type rolling mills 12a,12b of an even number which are paired every coil by using the shift position A,B determined in order to obtain a predetermined plate crown,so that the wear of the surface of the roll can be dispersed.
Further,in case of the odd-number stand and the even-number stand shown in FIG.6,by shifting the rolling mills on the upstream sides in the oppsite directions by the same distance,the change in the cross section shape of the steel plate caused by the shifting operation for dispersing the wear occurring in the rolling mill 12a on the upstream side can be canceled by the rolling mill 12b on the downstream side.The achievement of the schedule-free rolling operation and the control of cross section shape of the steel plate,that is,the plate crown control by the dispersion of the local wear of the roll surface can be compatibly performed.
根據上述的該發(fā)明的結構,軋制操作在如下的工藝中完成,軸向移動軋機12a,12b的沿軸向工作的軋輥13通過在A,B間移動為了獲得預定的軋板凸度,以便離散軋輥表面的磨軋。
而且,在圖6中的奇數(shù)個軋輥和偶數(shù)個軋輥的軋機,通過改變上游軋機在相反方向的相同距離,上游軋機12a因軋制操作產生的鋼板截面形狀的變化,可以由下游的軋機12b撤銷。軋制操作的完成以及鋼板的截面形狀的控制,即由軋輥表面的局部磨軋離差控制的軋板凸度可以很好的控制。
Although the direction of the convex crown of the upper work roll 1 of the odd-number stand and that of the even-number stand are the same in the example of FIG.6,as shown in the example of FIG.7,the directions of the convex crowns of the upper work rolls 1 may be oppsite.In this case,by shifting the rolling mills on the upper and down stream sides in the same direction by the same distance,effects similar to those of FIG.6 can be obtained.
盡管圖6中奇數(shù)個軋輥與偶數(shù)個的的上工作軋輥1的凸面是一樣的,而圖7中所示的卻可能相反。在次情況,通過在相同方向改變上下游軋機的相同距離,仍然可以獲得類似于圖6的軋制效果。
That is,the hot tandem rolling mill of the present invention has excellent effects such that both of the schedule-free rolling operation by the dispersion of the wear of the surface of the roll and the control of the cross section shape of a steel plate can be performed.
該熱軋機有比較好的特性,由軋輥表面的磨軋離差產生的軋制操作和鋼板截面形狀的控制都可以實現(xiàn)。
Although the invention has been described with reference to certain preferred to the embodiments.On the contrary,the invention includes all improvements,modifications,and equivalents within the scope of the append claims.
盡管這項發(fā)明被認為涉及到一定的其他創(chuàng)意的原形。但與此相反,在這個范圍的附加的技術要求,該發(fā)明包括全部的技術提高,修改以及同等設備。
What is claimed is:
1、A hot tandem rolling mill for shaping a plate to a predermined cross-sectional shape,comprising:
a first rolling mill including upper and lower work rolls,each of the work rolls having a crown with a direction;
a second roll-shift rolling mill including upper and lower work rolls,each of the work rolls having a crown with a direction;
a controller operably connnected to the first and second roll-shift rolling mills to shift the first and second roll-shift rolling mills in tandem by a first crown control shift amount sufficient to impart a desired cross-sectional shape to a plate rolled between the upper and lower work rolls,and to shift the first and second roll shift-rolling mill in tandem by a second wear dispersion amount,whereby an effect on the cross-sectional shape of the plate due to the second amount shift of the first roll shift rolling mill is cancelled out by an effct on the cross-sectional shape of the plate duo to the second amount shift of the second roll shift rolling mill,and whereby the second amount shift disperses wear on the upper and lower work rolls.
附加說明:
1、形成預定橫截面形狀的熱軋機包括如下內容:
包括上下的工作輥,并且各個工作輥在一個方向上的凸度,為第一臺軸向移動軋機;
包括上下工作軋輥,并且各個工作軋輥一個方向上的凸度,為第二臺軸向移動軋機;
連接第一臺和第二臺軸向移動軋機控制器通過第一臺凸度足夠的移動來改變這一前一后兩臺軋機的各自的位移,以達到在上下軋輥間的鋼板獲得先前預定的截面的形狀,控制器通過第二臺的磨軋位移離差改變一前一后的兩臺軋機的位移.通過第二臺軋機位移產生的截面形狀的影響借以緩和由于第一臺軋機第二位移在第二個軋機軋板截面形狀的影響,再借以地而位移分散上下軋輥的表面磨軋。
2、A hot tandem rolling mill according to claim1,wherein the direction of the crown of the upper work roll of the first roll-shift rolling mill is equal to the direction of the crown of the upper work roll of the second roll-shift rolling mill, and a direction of the second amount shift of the first roll-shift rolling mill is opposite to a direction of the second amount shift of the second roll-shift rolling mill.
2、根據說明1,第一個軋機上軋輥與第二臺軋機的上軋輥的凸線在水平方向上平齊,第一個軋機與第二臺軋機在軸向的二次位移相反。
3、A hot tandem rolling mill according to claim 1,wherein the direction of the crown of the upper work roll of the first roll-shift rolling mill is opposite to the direction the crown of the upper work roll of the second roll-shift rolling mill,and a direction of the second amount shift of the first roll-shift rolling mill is equal to a direction of the secong amount shift of the second roll-shift rolling mill.
3、根據說明1,第一個軋機上軋輥與第二臺軋機的上軋輥的凸線相反,第一個軋機與第二臺軋機在軸向的位移相同。
4、A hot tandem rolling mill according to claim 1,further comprising at least one additional pair of first and second roll-shift rolling mills.
4、根據說明1,進一步的增加磨軋系統(tǒng)至少有一對如上述的第一和第二軋機。
5、A hot tandem rolling mill according to claim2,wherein the controller periodically reverses direction of the second amount shift of the first and second rolling mills so that the direction of the second amount shift of the first roll-shift rolling mill remains opposite to a direction of the second amount shift of the first roll-shift rolling mill remains opposite to a direction of the second amount shift of the first roll-shift rolling mill.
5、根據說明2,控制器周期性的反向改變第一和第二個軋機第二位移量的方向使第一個軋機的二次位移方向仍與第一個軋機一次位移量的方向相反。
6、A hot tandem rolling mill according to claim 3,wherein the controller periodically reverses direction of the second amount shift of the first and second roll-shift rolling mills so that the direction of the second amount shift of the first roll-shift rolling mill remains equal to a direction of the second amount shift of the first roll-shift rolling mill.
6、根據說明3,控制器周期性的反向改變第一和第二個軋機第二位移量的方向使第一個軋機的二次位移方向仍與第一個軋機一次位移量的方向相同。
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