• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The forward slip and the backward slip at a first stand are dependant upon a draft, the back tension, the front tension, and the shape of a sheet in a tandem type rolling mill. It is difficult to control the shape solely by detecting the tension distribution between the last stand and the tension reel. In the method of this invention, the shape of a rolled sheet is controlled by disposing a first shape meters between the pay-off reel and the first stand and a second shape meter between the last stand and the tension reel whereby shape control can be attained through a simple system. Tension distributions detected by the two shape meters are functions of the forward slip and the backward slip. Accordingly the forward slips and the backward slips at all other stands except the first and last stands need not be considered when the tension distributions between the pay-off reel and the first stand and between the last stand and the tension reel are detected and the sums of these tension distributions produce a desired pattern. The shape control is attained by disposing a first shape meter at the input side of the first stand and a second shape meter at the output side of the last stand and by controlling the roll bending force and/or a roll coolant available at each stand so as to produce the sum in the desired pattern.
    公开号:SU1048980A3
    申请号:SU782684455
    申请日:1978-11-04
    公开日:1983-10-15
    发明作者:Икеми Синити；Охба Коити
    申请人:Мицубиси Денки Кабусики Кайся (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a method for adjusting the shape of a rolled sheet (strip) in a rolling mill of a continuous type. The stretch strip during rolling depends on the relative reduction, and the distribution of the stretch in the transverse direction depends on the distribution of the thickness of the TIN 7 of the strip in the transverse direction (its profile) on the inlet side and on the distribution of the thickness of the strip in the transverse direction (its profile after rolling. On the distribution then strip lengths after rolling, (transversely, on the thickness ratios) are affected by the change in the profile of the mill rolls, such as, for example, the elastic deformation of the mill roll, its thermal expansion, caused by heat from rolled laminates to rolling rollers, wear of rolling rollers. The distribution of stretching in the transverse direction affects the distribution in the transverse direction of compressive stress and tensile stress along the strip, which remain similar to the distribution of stretching in the transverse direction. When these the stresses exceed a certain limit, a deformation of the rolled strip occurs, resulting in bulging, which is a defect in shape. There is a known method of adjusting the direct strip of a strip by means of counter-bend of basks with a change in the force of the counter-bend as a function of the difference in tension across the width of the strip 1. The known method does not take into account.; of all factors affecting the transverse strip thickness variation, and therefore does not provide high accuracy of shape. There is also a known method of adjusting the shape of a rolled strip by affecting the profile of the rolls of the last stand in the distribution function of the tension at the exit from the stand across the width of the strip 2. G According to the well-known method of adjusting the shape, it is desirable to create a uniform front tension in the last stand. However, in a continuous type rolling mill, it is usually difficult to obtain a uniform distribution in the transverse direction of the bedding in the first stand, with the result that the velocity distribution on the downstream side of the first stand is also not uniform in the transverse direction. Therefore, the lag in the first stand (if not taking into account the back tension in the first stand) is not uniform in the transverse direction and changes depending on the shape of the strip on the exit side of the first stand. To create. evenly distributing the lag, it is necessary to create a certain distribution of tension between the dispensing reel and the first stand. Accordingly, even when creating a uniform front tension in the last stand, it is impossible to obtain the desired shape of the rolled strip due to the uneven distribution of the rear tension in the first stand,. The purpose of the invention is to improve the accuracy of the shape of the resulting strip. This goal is achieved in that according to the method of adjusting the strip profile during its rolling with tension on a continuous mill with marking the strip from the roll at the mill entrance and the deep strip into the roll at the exit of the mill by adjusting the roll profile from the tension distribution signal The width of the strip at the entrance to the mill is additionally measured across the width at the exit of the mill and the resulting signal is summed up. with the aforementioned, signal of tension distribution at the output of the mill. Fig. 1 shows a variant of a block circuit intended for implementing a method for adjusting the shape of a rolled strip; FIGS. 2-7 show various forms of rolled strip at the inlet and outlet of the mill; Fig. 8 shows the profile of a strip and a plot of tensions along its width; Fig, 9 is a diagram of the operations of the main part of the variant block diagram 1 "L, shown in Fig.1; Figs. 10 and 11 are other variants of the flowchart for implementing the inventive method, .. The flowchart (Fig. 1) shows strip 1, mill rolls 2, 3 and 4, an outstanding winder 5, tension winder b, devices for adjusting the bending force 7, 8 and 9, gauges 10 and 11 for determining each of the tension distributions in the transverse direction, an arithmetic unit 12 that receives the tension distributions determined by gauges 10 and 11, Determines if sums of distributions match. A desired change, such as a constant lag, and finding the difference between the desired change and the given tension distribution, is an arithmetic unit 13 that regulates the roll bending force in the last stand or in the first stand or in each stand. The dependencies between lead, lag, and back strap are explained for TOI7O when a flat I band is fed from the output winder and compression is off. The first stand has some distribution in the transverse direction. The distribution of advance f (x) in the first stand is expressed as: f (x) g (2C, (x), R (x), (x),), (where H (x) is the distribution of reduction in the transverse direction; R ( x) is the roll radius distribution in the transverse direction, h (x) is the strip thickness distribution on the input side in the transverse direction — friction coefficient, X is the distance from the side edge of the strip. When the roll radius distribution .and the distribution of the strip thickness on the input to the side are constant, and the reduction distribution is not constant, the lead f (x) has the distribution expressed by (i). The lag distribution, I (x) in the first stand, is expressed as -Hf (7)) (2 where ho (x) is the thickness of the strip on the exit side. The settling distribution is not constant. Between the output winder and A certain back tension is created by the first stand, which depends on the lag distribution. The advance distribution determines the mass flow between the inlet and the output of the first stand.When the thickness of the strip on the output side has some. distribution in width, speed on the output side of the first stand. also has a definite -p spread. Thus, even if the strip shape on the emitting coiler is flat (the thickness is uniform), this is not enough. If the compression in the first stand changes, the tension between the outstanding winder and the first stand. has a certain distribution, as well as the speed at the exit of the first stand. The distribution of the speed of the strip, fed to the last stand, in the transverse direction depends on the first stand, the second stand (p-1) -th adhesive, and depending on the shape of the npOKai strip, the reduction rate in the first stand affects the i.e. the thickness of the strip on the exit side of the second stand depends on the thickness of the strip on the exit side and the output speed of the first stand. The thickness of the strip on the exit side of the third stand depends on the thickness of the strip on the exit-. Noah side and output speed of the second stand, etc. Accordingly, the thickness of the strip on the input side and the input speed of the last stand depend on the reduction in the first stand, and there is no need to consider the distribution of reduction in the cells from the second (p-1) -th. Thus, to obtain the desired shape of the rolled strip, it is necessary to have the desired change in the sum of the distribution of the rear tension in the first stand and the distribution of the front tension in the last stand. FIG. 1-6 show the tension distribution during rolling in one stand, as shown in FIG. 2; in fig. 3 sections of strip 1, with the left part showing the section before rolling, and the right - after. FIG. 4-7 are graphs in which each tension value is plotted on the ordinate axis, and each width value is on the abscissa axis, with the left graphs showing the tensions defined by an equal shape emitter, and the right ones are the tension, -. jieHHHe second gauge form 11 ,. at the same time on .fig. 4 shows the distribution of tension in the cross section of the flat form before rolling; in fig. 5 - the distribution of chat g-, ri In the cross section of the flat form of the other rolling and in the section with the waviness of the strip after rolling; Fig. 6b shows the distribution of tension in the cross section of the flat form before rolling and in the section with the crookedness of the strip after rolling. The tension distributions are correspondingly similar to the shape of the cross section in the case of a flat strip on the inlet side. FIG. Figure 7 shows the conditions created by the control method shown in Figure 1. The forces to bend the rolls 7, 8 and 9 are adjusted such that the sums of the distribution of tension determined by the first meter 10 and the distribution of tension determined by the second meter of form 11 give the distribution for the desired shape (in this case flat). When adjustment is made (Fig. 7), a flat cross section is obtained. When the cross-sectional shape of the strip is set, shown in Fig. 8 above, the roll bending forces are adjusted in such a way that the sum of the distributions determined by the first and second shape gauges 10 and 11 gave the tension distribution shown in Figure 8 below. The shape of the strip On the input side is flat. : When the shape of the strip on the inlet side is not flat 1 K, it is easy to foresee such sums of tension distributions that give the desired cross-sectional shape. When the cross section of the rolled strip has a thickening in the center, and rolled onto the strip is wound on a tension winder b, the central part of the rolled strip wound on this winder becomes thicker, which results in an effect like when a tension winder 6 having a larger radius center and smaller, at the ends. Accordingly, during normal operation, the tension in the center is greater than the tension at the ends. In this case, the standard tension distribution is not uniform. . FIG. 9 shows an operation scheme where the tension distribution between the emitting coiler and the first stand is determined by a shape meter 10, and the tension distribution between the Tensioner and the last stand — a shape meter 11. CS Mg / m tension distributions are determined by element 14, and the tension distribution is compared with the desired tension distribution in order to obtain the difference between them in element 15. Then the reduction distribution in the last stand is determined by using the said difference in element 16. Definition, n Whether such a calculated distribution of reduction in the last stand is within the allowable range or not is performed in element 17. When it is within the allowable range, in element 18 below, the roll bending force along the last stand is read. When it is not r - "- within the acceptable range

    ABOUT
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    Fig.5 D element. 19, the bending strength of the rolls of the first stand is calculated. The determination of whether the calculated bending force of the rolls of the first stand affects the accuracy of the strip thickness or not is performed in element 20. If the -band thickness can be changed using the named parameter, the bending strength of the rolls of the first stand is adjusted. If the strip thickness cannot be changed with the aid of this parameter, the element 21 calculates the tension, the bending forces of the intermediate stand rolls and the required bending strength of the rolls. FIG. 10 and 11 are block diagrams of other variants of the proposed method of adjusting the shape of the rolled sheet. FIG. 10 shows the arithmetic unit 22 for determining the time delay from the moment of the gripping of the band by the first cell to the capture of the band by the last cell; the delay device 23 for delaying the time determined by the form meter 10, depending on the delay time calculated by the arithmetic unit 22, FIG. 11 shows an arithmetic unit 24 for determining the number of roll coolers; positions 25, 26 and 27 denote means for adjusting the roll cooler pddas. . If the shape of the STRIP cannot be controlled only by the bending forces of the rolls, to obtain the desired shape of the strip, its adjustment i is carried out by changing the flow distribution of the roll cooler in the transverse direction.
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    权利要求:
    Claims (1)
    [1]
    METHOD FOR ADJUSTING THE STRIP PROFILE FOR WHEEL when rolling it with tension on a continuous mill with unwinding the strip from the roll at the entrance to the mill and winding the strip into the roll at the exit of the mill by regulation ·; profile of the roll from the signal is distributed. the tension along the width of the strip at the exit of the mill, and the fact that, in order to increase the accuracy of the shape of the obtained strip, they additionally measure the distribution of tension along the width of the strip at the entrance to the mill and sum the received signal with the mentioned signal distribution of tension at the outlet of the mill. _
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    同族专利:
    公开号 | 公开日
    US4199967A|1980-04-29|
    GB2007565A|1979-05-23|
    DE2848727C2|1982-10-21|
    GB2007565B|1982-04-07|
    DE2848727A1|1979-05-17|
    SE440488B|1985-08-05|
    JPS5467550A|1979-05-31|
    SE7811553L|1979-05-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CA680007A|1961-02-10|1964-02-11|Westinghouse Electric Corporation|Automatic gauge control system|
    GB1231008A|1968-03-25|1971-05-05|
    BE754385A|1969-08-06|1971-01-18|Bbc Brown Boveri & Cie|SYSTEM FOR PRE-ADJUSTING THE ADJUSTMENT OF THE GAP OF THE CYLINDERS OF A COLD ROLLING CAGE SET ACCORDING TO THE THICKNESS OF THE BELT|
    JPS4817146B1|1970-03-07|1973-05-26|
    DD85043A1|1970-08-31|1971-10-12|Arrangement for regulating the voltage profile across the bandwidth|
    DE2133942C3|1971-07-02|1973-11-29|Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt|Arrangement for the non-contact measurement of the speed of an object|
    JPS5225824B2|1972-10-16|1977-07-09|
    US3934438A|1973-05-09|1976-01-27|Nippon Kokan Kabushiki Kaisha|Method of long-edge shape control for tandem rolling mill|
    JPS545384B2|1973-05-09|1979-03-16|DE2927769C2|1979-07-10|1987-01-22|Sms Schloemann-Siemag Ag, 4000 Duesseldorf, De|
    JPS641208B2|1979-12-27|1989-01-10|Mitsubishi Electric Corp|
    JPH06244B2|1984-05-09|1994-01-05|三菱電機株式会社|Plate shape control device|
    DE3435232C2|1984-09-26|1987-02-26|Hoesch Stahl Ag, 4600 Dortmund, De|
    AT211031T|1995-11-20|2002-01-15|Sms Demag Ag|DEVICE FOR INFLUENCING THE PROFILE OF ROLLED ROLLING STRIP|
    DE102008015828A1|2007-09-26|2009-04-02|Sms Demag Ag|Rolling device and method for its operation|
    CN102274862B|2011-07-12|2013-11-06|马鞍山钢铁股份有限公司|Method for overcoming rib raising drawback of cold-rolled steel strip|
    CN110624954B|2019-10-16|2021-01-08|北京首钢股份有限公司|Plate shape control method for hot-rolled thin high-strength weathering steel|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP13491777A|JPS5467550A|1977-11-09|1977-11-09|Shape control of rolled material|
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