A frame and roller configuration method for headless rolling equipment

Abstract

The invention discloses a method for configuring the frame and roll shape of headless rolling equipment, and relates to the technical field of steel rolling. The method comprises: configuring the roll shape of the support rolls of the rough rolling frames H0, H1 and H2 into a parabolic roll shape; then configuring the roll shape of the working rolls of the rough rolling frames H0 and H1 into a parabolic roll shape, and configuring the roll shape of the working rolls of the frame H2 into a CVC roll shape; then configuring the roll shape of the support rolls of the five frames of the finishing rolling frames F1 to F5 into a parabolic roll shape; finally configuring the roll shape of the working rolls of the finishing rolling frames F1 and F2 into a CVC roll shape, and the roll shape of the working rolls of the frames F3, F4 and F5 adopts a single-sided tapered roll shape. In this way, the problems of "U"-shaped wear of the working rolls, continuous increase in the thermal convexity of the working rolls, large differences in working conditions during thinning and re-thickening, etc., which occur during the same-width rolling of the long roll period, can be effectively solved, so that the headless rolling production line can be stably rolled during the long roll period.

Description

Technical Field

[0001] The invention relates to the technical field of steel rolling, and in particular to a frame and roller configuration method of headless rolling equipment. Background Art

[0002] Due to the diversity of the development of headless rolling production process, the rolling line equipment composition and layout of thin slab continuous casting and rolling also present flexible and changeable combinations. However, they all maintain the common advantages of headless rolling technology - that is, steel production is no longer a single piece and intermittent, but continuous rolling, the number of strip bites is reduced, the impact on the roll is also reduced, which is conducive to improving the life of the roll, and continuous rolling reduces the fluctuation of the cross-sectional shape of the steel, improves the quality of the steel, is conducive to the production of thin and ultra-thin strip steel, and can be cut into the required length or coil weight according to demand, which significantly improves the product yield.

[0003] The biggest advantage of thin slab continuous casting and rolling is continuous rolling, but it also brings corresponding problems: during long-term continuous rolling, the wear of the rolls continues to increase, and the thermal expansion characteristics are also quite different from those of conventional hot rolling. As the length of the roll cycle increases, the wear and thermal expansion of the working rolls intensify, and problems such as wave shape and deviation appear between the roll stands in the later stage, and the convexity of the strip gradually loses control. Summary of the invention

[0004] In view of the above problems, the present invention is proposed to provide a method for configuring a stand and a roll shape of an endless rolling equipment that overcomes the above problems or at least partially solves the above problems.

[0005] According to a first aspect of the present invention, a roll shape configuration method is provided, which is applied to a stand of an endless rolling equipment, comprising:

[0006] The support rolls of the rough rolling stands H0, H1 and H2 are configured to have a parabolic roll shape;

[0007] The working rolls of the rough rolling stands H0 and H1 are configured to have a parabolic roll shape, and the working rolls of the stand H2 are configured to have a CVC roll shape;

[0008] The support rolls of the five finishing rolling stands F1 to F5 are configured into a parabolic roll shape;

[0009] The working rolls of the finishing rolling stands F1 and F2 are configured as CVC rolls, and the working rolls of the stands F3, F4 and F5 are configured as single-sided tapered rolls.

[0010] Optionally, the parabolic roller shape of the support rollers of the frame H0, the frame H1 and the frame H2 may be in the form of a curve:

[0011]

[0012] Among them, B Hi (x) is the relative deviation of the support roller radius; i is the roughing mill stand number, with values ​​of 0, 1, and 2; L is the length of the support roller surface of the roughing mill stand, with a value range of 900 mm to 2000 mm; x is the axial coordinate of the support roller surface, with a value range of -L / 2 to L / 2; C HBi It is the convexity coefficient of the rough rolling support roll, and its value range is -1mm~1mm.

[0013] Optionally, the roll profiles of the working rolls of the stands H0, H1 and H2 are in the form of:

[0014]

[0015] Among them, W Hi (x) is the relative deviation of the working roll radius; x is the axial coordinate of the working roll surface, ranging from 0 to L+2S, L is the length of the roughing stand support roll surface, S is the axial roll shifting stroke of the working roll of the roughing stand; i is the roughing stand number, ranging from 0, 1, 2; C HWi is the convexity coefficient of the rough rolling work roll, and its value range is -1mm~1mm; a1 is the CVC roll polynomial coefficient, and its value range is: -3.31813E-05~-2.98632E-04; a2 is the CVC roll polynomial coefficient, and its value range is: -1.66568E-07~-1.49911E-06; a3 is the CVC roll polynomial coefficient, and its value range is: 1.05757E-10~9.51814E-10.

[0016] Optionally, the parabolic roll shape of the support rolls of the five stands F1 to F5 of the finishing rolling mill is in the form of a curve:

[0017]

[0018] Of which, B Fi (x) is the relative deviation of the roller radius of the finishing support roller; i is the number of the finishing stand, with values ​​of 1, 2, 3, 4, and 5; L is the length of the roller surface of the finishing stand support roller, with a value range of 900 mm to 2000 mm; x is the axial coordinate of the roller surface of the finishing support roller, with a value range of -L / 2 to L / 2; C FBi It is the roller convexity coefficient of the finishing support roller, and its value range is -1mm~1mm.

[0019] Optionally, the CVC roll profile of the working rolls of the finishing stands F1 and F2 is as follows:

[0020] W Fi (x) = b 1i x+b 2i x 2 +b3i x 3 i=1,2

[0021] Among them, W Fi (x) is the relative deviation of the roller radius of the finishing work roll; i is the number of the finishing stand, x is the axial coordinate of the roller surface of the finishing work roll, and the value range is 0~L+2S, L is the roller surface length of the supporting roll of the finishing stand, and S is the axial roller shifting stroke of the working roll of the finishing stand; b 1i is the CVC roll polynomial coefficient, the value range is: 3.21898E-05~2.89709E-04; b 2i is the CVC roller polynomial coefficient, the value range is: -1.07079E-07~-9.63712E-07; b 3i is the CVC roller polynomial coefficient, and its value range is: 5.28786E-11~4.75907E-10.

[0022] Optionally, the single-sided tapered roll profile of the working rolls of the finishing stands F3, F4 and F5 is as follows:

[0023]

[0024] Among them, W Fi (x) is the relative deviation of the roller radius of the finishing work roll; i is the number of the finishing stand, x is the axial coordinate of the roller surface of the finishing work roll, the unit is mm, the value range is 0 to L+2S, L is the roller surface length of the supporting roll of the finishing stand, S is the axial roller shifting stroke of the working roll of the finishing stand; c1 and c2 are the roller shape coefficients of the first section, the value range is 0 to 1; d1, d2, d3, R1 are the roller shape coefficients of the second section, the value range is -50000 to 50000; e1, e2, e3 are the roller shape coefficients of section III, with a value range of -3000 to 3000; f1, f2, f3, R2 are the roller shape coefficients of section IV, with a value range of -5000000 to 5000000; g1, g2 are the roller shape coefficients of section V, with a value range of 0 to 1; L1, L2, L3, L4, L5 are the roller lengths of sections I to V, in mm, satisfying L1≤L2≤L3≤L4≤L5=L+2S.

[0025] Optionally, the working rolls of the roughing mill stand and the working rolls of the finishing mill stand both have the function of axial roll shifting.

[0026] According to a second aspect of the present invention, there is provided a rack of a headless rolling equipment, comprising: a rough rolling rack H0, a rack H1, a rack H2, and a finishing rolling rack F1, a rack F2, a rack F3, a rack F4, and a rack F5;

[0027] Stands H0 to H2 include support rolls and working rolls, respectively. The support rolls of stands H0, H1 and H2 have parabolic roll shapes, the working rolls of stands H0 and H1 have parabolic roll shapes, and the working rolls of stand H2 have CVC roll shapes.

[0028] The frames F1 to F5 include support rolls and working rolls respectively. The support rolls of the frames F1 to F5 have a parabolic roll shape, the working rolls of the frames F1 and F2 have a CVC roll shape, and the working rolls of the frames F3 to F5 have a single-sided tapered roll shape.

[0029] Optionally, the working rolls of the roughing mill stand and the working rolls of the finishing mill stand both have the function of axial roll shifting.

[0030] Optionally, the axial shifting stroke range of the working roll is 100 mm to 300 mm.

[0031] The above one or more technical solutions in the embodiments of this specification have at least the following technical effects:

[0032] The embodiments of the present specification provide a method for configuring the frame and roller shape of a headless rolling equipment, including a roughing roller shape configuration and a use method, and a finishing roller shape configuration and a use method. In a typical 8-frame headless rolling production line, according to the characteristics of the rolling working conditions, the working rolls and support rolls of the frames are configured with a combination of parabolic roller shape, triple CVC roller shape, and single-sided tapered roller shape to solve the problems of "U"-shaped wear of the working rolls during the same-width rolling process of long rolls, continuous increase in the thermal convexity of the working rolls, and large differences in working conditions during thinning and rethickening, so that the headless rolling production line can perform stable rolling during the long roll period.

[0033] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference figures are used to represent the same parts throughout the accompanying drawings.

[0035] In the attached picture:

[0036] Figure 1 A flow chart of a roller shape configuration method in an embodiment of the present invention is shown.

[0037] Figure 2A schematic diagram of a frame of a headless rolling equipment in an embodiment of the present invention is shown.

[0038] Figure 3 A schematic diagram of a single-sided tapered roller in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Due to the diversity of the development of headless rolling production process, the rolling line equipment composition and layout of thin slab continuous casting and rolling also present flexible and changeable combinations. However, they all maintain the common advantages of headless rolling technology - that is, steel production is no longer a single piece and intermittent, but continuous rolling, the number of strip bites is reduced, the impact on the roll is also reduced, which is conducive to improving the life of the roll, and continuous rolling reduces the fluctuation of the cross-sectional shape of the steel, improves the quality of the steel, is conducive to the production of thin and ultra-thin strip steel, and can be cut into the required length or coil weight according to demand, which significantly improves the product yield.

[0044] The biggest advantage of thin slab continuous casting and rolling is continuous rolling, but it also brings corresponding problems: during long-term continuous rolling, the wear of the rolls continues to increase, and the thermal expansion characteristics are also quite different from those of conventional hot rolling. As the length of the roll cycle increases, the wear and thermal expansion of the working rolls intensify, and problems such as wave shape and deviation appear between the roll stands in the later stage, and the convexity of the strip gradually loses control.

[0045] Based on the above research content, this embodiment provides a roll shape configuration method, which is applied to the frame of the headless rolling equipment. Figure 1 , Figure 2 As shown, the roller shape configuration method includes steps 101 to 104:

[0046] Step 101: configuring the support rolls of the rough rolling stands H0, H1 and H2 to have a parabolic roll shape;

[0047] Step 102: The working rolls of the rough rolling stands H0 and H1 are configured to have a parabolic roll shape, and the working rolls of the stand H2 are configured to have a CVC roll shape;

[0048] Step 103: configuring the support rolls of the five finishing rolling stands F1 to F5 to have a parabolic roll shape;

[0049] Step 104: The working rolls of the finishing rolling stands F1 and F2 are configured to have a CVC roll shape, and the working rolls of the stands F3, F4 and F5 are configured to have a single-sided tapered roll shape.

[0050] Among them, the headless rolling equipment is a typical 8-stand headless rolling equipment, that is, the equipment includes 8 stands or 8 rolling mills. Among them, 3 stands are rough rolling stands and 5 stands are finishing rolling stands. All 8 rolling mills are four-roll mills, with a pair of working rolls and a pair of support rolls. All rolling mills have the functions of axial roll shifting and bending of the working rolls. The axial roll shifting stroke of the working rolls is ±S, in mm, and the range of the roll shifting stroke is 100mm-300mm. An induction heating or tunnel furnace heating device is equipped between rough rolling and finishing rolling to supplement the heat of the intermediate billet.

[0051] In this embodiment, considering the characteristics of the headless rolling production conditions, a functional partition is made for the rack of the headless rolling equipment. In detail, the strip thickness from rack H0 to rack H1 is relatively thick and the temperature is relatively high. The strip is mainly deformed here, so a parabolic roller-shaped working roll is selected with a parabolic roller-shaped support roll. In the stage of racks H2, racks F1 and racks F2, the strip has been thinned to a relatively thin thickness, for example, 5 to 20 mm, which is closer to the thickness of the final product, and the strip temperature is also relatively high, about 900 to 1200 degrees, after passing through the heating device in the middle. At this time, the profile of the strip needs to be controlled, so the rack is required to have a relatively strong ability to control the profile of the strip. Therefore, when configuring, a CVC roller-shaped working roll is selected with a parabolic roller-shaped support roll. The CVC roller-shaped roll is a continuously variable crown roll. In the stage of stand F3-stand F5, the temperature of the strip is relatively low and the thickness of the strip is relatively thin, the thinnest being 0.8-1.0mm. At this time, the strip is not easy to deform, and the strip is getting longer and longer. Therefore, during rolling, the rotation speed of the roll is getting faster and faster. Therefore, the stand at the rear end is seriously worn. Based on the characteristics of this working condition, a single-sided tapered working roll is selected with a parabolic support roll.

[0052] Specifically, the curve form of the parabolic roll shape of the support rolls of the roughing stand H0, stand H1 and stand H2 is:

[0053]

[0054] Among them, B Hi (x) is the relative deviation of the support roller radius; i is the roughing mill stand number, with values ​​of 0, 1, and 2; L is the length of the support roller surface of the roughing mill stand, with a value range of 900 mm to 2000 mm; x is the axial coordinate of the support roller surface, with a value range of -L / 2 to L / 2; C HBi It is the convexity coefficient of the rough rolling support roll, and its value range is -1mm~1mm.

[0055] The roll profile curves of the working rolls of the roughing stand H0, stand H1 and stand H2 are as follows:

[0056]

[0057] Among them, W Hi (x) is the relative deviation of the working roll radius; x is the axial coordinate of the working roll surface, ranging from 0 to L+2S, L is the length of the roughing stand support roll surface, S is the axial roll shifting stroke of the working roll of the roughing stand; i is the roughing stand number, ranging from 0, 1, 2; C HWiis the convexity coefficient of the rough rolling work roll, and its value range is -1mm~1mm; a1 is the CVC roll polynomial coefficient, and its value range is: -3.31813E-05~-2.98632E-04; a2 is the CVC roll polynomial coefficient, and its value range is: -1.66568E-07~-1.49911E-06; a3 is the CVC roll polynomial coefficient, and its value range is: 1.05757E-10~9.51814E-10.

[0058] Among them, the working rolls of stands H0 and H1 adopt variable stroke periodic roll shifting, with a roll shifting step of 5 to 10 mm and a roll shifting frequency of 1 roll of strip steel. The roll shifting directions of adjacent stands are opposite, and the roll shifting moment is when the virtual shear point of the strip reaches the roll gap of the rolling mill. The roll shifting time is 10 to 20 seconds.

[0059] The curve form of the parabolic roll shape of the support rolls of the five stands F1 to F5 of the finishing rolling is:

[0060]

[0061] Of which, B Fi (x) is the relative deviation of the roller radius of the finishing support roller; i is the number of the finishing stand, with values ​​of 1, 2, 3, 4, and 5; L is the length of the roller surface of the finishing stand support roller, with a value range of 900 mm to 2000 mm; x is the axial coordinate of the roller surface of the finishing support roller, with a value range of -L / 2 to L / 2; C FBi It is the roller convexity coefficient of the finishing support roller, and its value range is -1mm~1mm.

[0062] The CVC roll curves of the working rolls of the finishing stands F1 and F2 are as follows:

[0063] W Fi (x) = b 1i x+b 2i x 2 +b 3i x 3 i=1,2

[0064] Among them, W Fi (x) is the relative deviation of the roller radius of the finishing work roll; i is the number of the finishing stand, x is the axial coordinate of the roller surface of the finishing work roll, and the value range is 0~L+2S, L is the roller surface length of the supporting roll of the finishing stand, and S is the axial roller shifting stroke of the working roll of the finishing stand; b 1i is the CVC roll polynomial coefficient, the value range is: 3.21898E-05~2.89709E-04; b 2i is the CVC roller polynomial coefficient, the value range is: -1.07079E-07~-9.63712E-07; b 3iis the CVC roller polynomial coefficient, and its value range is: 5.28786E-11~4.75907E-10.

[0065] The setting range of the roll shifting amount of the working rolls of frames F1 and F2 is ±S, the roll shifting step length is 5 to 10 mm, the roll shifting frequency is 1 roll of strip steel, the roll shifting moment is when the virtual shear point of the strip reaches the roll gap of the rolling mill, the roll shifting duration is 20 to 40 seconds, and the roll shifting direction of the working rolls is automatically controlled by the plate shape control model according to the deviation between the actual convexity of the finished product and the target convexity, so that the convexity of the finished product reaches the control target range.

[0066] Combination Figure 3 As shown, the single-sided tapered roll curve of the working rolls of the finishing rolling stands F3, F4 and F5 is as follows:

[0067]

[0068] Among them, W Fi (x) is the relative deviation of the roller radius of the finishing work roll; i is the number of the finishing stand, x is the axial coordinate of the roller surface of the finishing work roll, the unit is mm, the value range is 0 to L+2S, L is the roller surface length of the supporting roll of the finishing stand, S is the axial roller shifting stroke of the working roll of the finishing stand; c1 and c2 are the roller shape coefficients of the first section, the value range is 0 to 1; d1, d2, d3, R1 are the roller shape coefficients of the second section, the value range is -50000 to 50000; e1, e2, e3 are the roller shape coefficients of section III, with a value range of -3000 to 3000; f1, f2, f3, R2 are the roller shape coefficients of section IV, with a value range of -5000000 to 5000000; g1, g2 are the roller shape coefficients of section V, with a value range of 0 to 1; L1, L2, L3, L4, L5 are the roller lengths of sections I to V, in mm, satisfying L1≤L2≤L3≤L4≤L5=L+2S.

[0069] The setting range of the single-sided taper roller shifting amount of the three frames F3 to F5 is ±S. When the working roll is in the initial roll shifting position, the edge of the strip is located in the roller shape range of the second section. As the number of rolled strip coils increases, the cone angle of the working roll gradually shifts toward the inside of the strip. The roll shifting step is 0 to 5 mm, the roll shifting frequency is 1 roll of strip, and the roll shifting moment is when the virtual shear point of the strip reaches the roll gap of the rolling mill. The roll shifting time is 20 to 40 seconds.

[0070] In summary, the embodiment of this specification provides a roll configuration method, including a roughing mill roll configuration and use method, a finishing mill roll configuration and use method, by using a parabolic roll, a triple CVC roll, and a single-sided tapered roll combination configuration for the working rolls and support rolls of the typical 8-stand headless rolling equipment according to the characteristics of the rolling working conditions, to solve the problems of "U"-shaped wear of the working rolls, continuous increase of the thermal convexity of the working rolls, and large differences in working conditions during thinning and re-thickening during the long roll period, so that the headless rolling production line can be rolled stably during the long roll period. Compared with the prior art, it avoids frequent replacement of rolls and reduces production costs.

[0071] Based on the same inventive concept, the present invention also provides a rack of a headless rolling equipment, including: a rough rolling rack H0, a rack H1, a rack H2, and a finishing rolling rack F1, a rack F2, a rack F3, a rack F4, and a rack F5;

[0072] Stands H0 to H2 include support rolls and working rolls, respectively. The support rolls of stands H0, H1 and H2 have parabolic roll shapes, the working rolls of stands H0 and H1 have parabolic roll shapes, and the working rolls of stand H2 have CVC roll shapes.

[0073] The frames F1 to F5 include support rolls and working rolls respectively. The support rolls of the frames F1 to F5 have a parabolic roll shape, the working rolls of the frames F1 and F2 have a CVC roll shape, and the frames F3 to F5 have a single-sided tapered roll shape.

[0074] The working rolls of the roughing mill stand and the working rolls of the finishing mill stand both have the function of axial roll shifting, and the stroke range of the axial roll shifting of the working rolls is 100 mm to 300 mm.

[0075] The curve form of the parabolic roll shape of the support rolls of the roughing stand H0, stand H1 and stand H2 is:

[0076]

[0077] Among them, B Hi (x) is the relative deviation of the support roller radius; i is the roughing mill stand number, with values ​​of 0, 1, and 2; L is the length of the support roller surface of the roughing mill stand, with a value range of 900 mm to 2000 mm; x is the axial coordinate of the support roller surface, with a value range of -L / 2 to L / 2; C HBi It is the convexity coefficient of the rough rolling support roll, and its value range is -1mm~1mm.

[0078] The roll profile curves of the working rolls of the roughing stand H0, stand H1 and stand H2 are as follows:

[0079]

[0080] Among them, W Hi (x) is the relative deviation of the working roll radius; x is the axial coordinate of the working roll surface, ranging from 0 to L+2S, L is the length of the roughing stand support roll surface, S is the axial roll shifting stroke of the working roll of the roughing stand; i is the roughing stand number, ranging from 0, 1, 2; C HWi is the convexity coefficient of the rough rolling work roll, and its value range is -1mm~1mm; a1 is the CVC roll polynomial coefficient, and its value range is: -3.31813E-05~-2.98632E-04; a2 is the CVC roll polynomial coefficient, and its value range is: -1.66568E-07~-1.49911E-06; a3 is the CVC roll polynomial coefficient, and its value range is: 1.05757E-10~9.51814E-10.

[0081] Among them, the working rolls of stands H0 and H1 adopt variable stroke periodic roll shifting, with a roll shifting step of 5 to 10 mm and a roll shifting frequency of 1 roll of strip steel. The roll shifting directions of adjacent stands are opposite, and the roll shifting moment is when the virtual shear point of the strip reaches the roll gap of the rolling mill. The roll shifting time is 10 to 20 seconds.

[0082] The curve form of the parabolic roll shape of the support rolls of the five stands F1 to F5 of the finishing rolling is:

[0083]

[0084] Of which, B Fi (x) is the relative deviation of the roller radius of the finishing support roller; i is the number of the finishing stand, with values ​​of 1, 2, 3, 4, and 5; L is the length of the roller surface of the finishing stand support roller, with a value range of 900 mm to 2000 mm; x is the axial coordinate of the roller surface of the finishing support roller, with a value range of -L / 2 to L / 2; C FBi It is the roller convexity coefficient of the finishing support roller, and its value range is -1mm~1mm.

[0085] The CVC roll curves of the working rolls of the finishing stands F1 and F2 are as follows:

[0086] W Fi (x) = b 1i x+b 2i x 2 +b 3i x 3 i=1,2

[0087] Among them, W Fi(x) is the relative deviation of the roller radius of the finishing work roll; i is the number of the finishing stand, x is the axial coordinate of the roller surface of the finishing work roll, and the value range is 0~L+2S, L is the roller surface length of the supporting roll of the finishing stand, and S is the axial roller shifting stroke of the working roll of the finishing stand; b 1i is the CVC roll polynomial coefficient, the value range is: 3.21898E-05~2.89709E-04; b 2i is the CVC roller polynomial coefficient, the value range is: -1.07079E-07~-9.63712E-07; b 3i is the CVC roller polynomial coefficient, and its value range is: 5.28786E-11~4.75907E-10.

[0088] The setting range of the roll shifting amount of the working rolls of frames F1 and F2 is ±S, the roll shifting step length is 5 to 10 mm, the roll shifting frequency is 1 roll of strip steel, the roll shifting moment is when the virtual shear point of the strip reaches the roll gap of the rolling mill, the roll shifting duration is 20 to 40 seconds, and the roll shifting direction of the working rolls is automatically controlled by the plate shape control model according to the deviation between the actual convexity of the finished product and the target convexity, so that the convexity of the finished product reaches the control target range.

[0089] Combination Figure 3 As shown, the single-sided tapered roll curve of the working rolls of the finishing rolling stands F3, F4 and F5 is as follows:

[0090]

[0091] Among them, W Fi (x) is the relative deviation of the roller radius of the finishing work roll; i is the number of the finishing stand, x is the axial coordinate of the roller surface of the finishing work roll, the unit is mm, the value range is 0 to L+2S, L is the roller surface length of the supporting roll of the finishing stand, S is the axial roller shifting stroke of the working roll of the finishing stand; c1 and c2 are the roller shape coefficients of the first section, the value range is 0 to 1; d1, d2, d3, R1 are the roller shape coefficients of the second section, the value range is -50000 to 50000; e1, e2, e3 are the roller shape coefficients of section III, with a value range of -3000 to 3000; f1, f2, f3, R2 are the roller shape coefficients of section IV, with a value range of -5000000 to 5000000; g1, g2 are the roller shape coefficients of section V, with a value range of 0 to 1; L1, L2, L3, L4, L5 are the roller lengths of sections I to V, in mm, satisfying L1≤L2≤L3≤L4≤L5=L+2S.

[0092] The setting range of the single-sided taper roller shifting amount of the three frames F3 to F5 is ±S. When the working roll is in the initial roll shifting position, the edge of the strip is located in the roller shape range of the second section. As the number of rolled strip coils increases, the cone angle of the working roll gradually shifts toward the inside of the strip. The roll shifting step is 0 to 5 mm, the roll shifting frequency is 1 roll of strip, and the roll shifting moment is when the virtual shear point of the strip reaches the roll gap of the rolling mill. The roll shifting time is 20 to 40 seconds.

[0093] In summary, the frame of a headless rolling equipment provided in this embodiment, through the configuration of the roughing roll shape and the finishing roll shape, in a typical 8-frame headless rolling production line, according to the characteristics of the rolling working conditions, the working rolls and support rolls of the frame are configured with a combination of parabolic roll shape, three-dimensional CVC roll shape, and single-sided tapered roll shape, so as to solve the problems of "U"-shaped wear of the working rolls during the same-width rolling process of long roll period, continuous increase in the thermal convexity of the working rolls, large differences in working conditions during thinning and rethickening, etc., so that the headless rolling production line can perform stable rolling during the long roll period.

[0094] The above are only various embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A roller configuration method, characterized in that: The stands used in endless rolling equipment include: The support rolls of the rough rolling stands H0, H1 and H2 are configured to have a parabolic roll shape; The working rolls of the rough rolling stands H0 and H1 are configured to have a parabolic roll shape, and the working rolls of the stand H2 are configured to have a CVC roll shape; The support rolls of the five finishing rolling stands F1 to F5 are configured into a parabolic roll shape; The working rolls of the finishing rolling stands F1 and F2 are configured as CVC rolls, and the working rolls of the stands F3, F4 and F5 are configured as single-sided tapered rolls; The curve form of the parabolic roller shape of the support rollers of the frames H0, H1 and H2 is: Among them, B Hi (x) is the relative deviation of the support roller radius; i is the roughing mill stand number, with values ​​of 0, 1, and 2; L is the length of the support roller surface of the roughing mill stand, with a value range of 900 mm to 2000 mm; x is the axial coordinate of the support roller surface, with a value range of -L / 2 to L / 2; C HBi It is the convexity coefficient of the rough rolling support roll, and its value range is -1mm~1mm.

2. A roller configuration method according to claim 1, characterized in that: The roll curves of the working rolls of the frames H0, H1 and H2 are as follows: Among them, W Hi (x) is the relative deviation of the working roll radius; x is the axial coordinate of the working roll surface, ranging from 0 to L+2S, L is the length of the roughing stand support roll surface, S is the axial roll shifting stroke of the working roll of the roughing stand; i is the roughing stand number, ranging from 0, 1, 2; C HWi is the convexity coefficient of the rough rolling work roll, and its value range is -1mm~1mm; a1 is the CVC roll polynomial coefficient, and its value range is: -3.31813E-05~-2.98632E-04; a2 is the CVC roll polynomial coefficient, and its value range is: -1.66568E-07~-1.49911E-06; a3 is the CVC roll polynomial coefficient, and its value range is: 1.05757E-10~9.51814E-10.

3. A roller configuration method according to claim 1, characterized in that: The curve form of the parabolic roll shape of the support rolls of the five stands F1 to F5 of the finishing rolling is: Of which, B Fi (x) is the relative deviation of the roller radius of the finishing support roller; i is the number of the finishing mill stand, with values ​​of 1, 2, 3, 4, and 5; L is the length of the support roll surface of the finishing mill stand, with a value range of 900 mm to 2000 mm; x is the axial coordinate of the support roll surface of the finishing mill stand, with a value range of -L / 2 to L / 2; C FBi It is the roller convexity coefficient of the finishing support roller, and its value range is -1mm~1mm.

4. A roller configuration method according to claim 1, characterized in that: The CVC roll curves of the working rolls of the finishing rolling stands F1 and F2 are as follows: W Fi (x)=b 1i x+b 2i x 2 +b 3i x 3 i=1,2 Among them, W Fi (x) is the relative deviation of the roller radius of the finishing work roll; i is the number of the finishing stand, x is the axial coordinate of the roller surface of the finishing work roll, and the value range is 0~L+2S, L is the roller surface length of the supporting roll of the finishing stand, and S is the axial roller shifting stroke of the working roll of the finishing stand; b 1i is the CVC roll polynomial coefficient, the value range is: 3.21898E-05~2.89709E-04; b 2i is the CVC roller polynomial coefficient, the value range is: -1.07079E-07~-9.63712E-07; b 3i is the CVC roller polynomial coefficient, and its value range is: 5.28786E-11~4.75907E-10.

5. A roller configuration method according to claim 1, characterized in that: The single-sided tapered roll profile of the working rolls of the finish rolling stands F3, F4 and F5 is as follows: Among them, W Fi (x) is the relative deviation of the roller radius of the finishing work roll; i is the number of the finishing stand, x is the axial coordinate of the roller surface of the finishing work roll, the unit is mm, the value range is 0~L+2S, L is the roller surface length of the finishing stand support roll, S is the axial roller shifting stroke of the working roll of the finishing stand; c1 and c2 are the roller shape coefficients of the first section, the value range is 0~1; d1, d2, d3, R1 are the roller shape coefficients of the second section, the value range is -50000~50000 ; e1, e2, e3 are the roller shape coefficients of section III, with a value range of -3000 to 3000; f1, f2, f3, R2 are the roller shape coefficients of section IV, with a value range of -5000000 to 5000000; g1, g2 are the roller shape coefficients of section V, with a value range of 0 to 1; L1, L2, L3, L4, L5 are the roller lengths of sections I to V, in mm, L1≤L2≤L3≤L4≤L5=L+2S.

6. A roller configuration method according to claim 1, characterized in that: The working rolls of the roughing mill stand and the working rolls of the finishing mill stand both have the function of axial roll shifting.

7. A frame of a headless rolling equipment, characterized in that: Using the roller configuration method described in any one of claims 1 to 6; The racks of the headless rolling equipment include: a rough rolling rack H0, a rack H1, a rack H2, and a finishing rolling rack F1, a rack F2, a rack F3, a rack F4, and a rack F5; The racks H0 to H2 respectively include support rolls and working rolls. The support rolls of the racks H0, H1 and H2 have a parabolic roll shape. The working rolls of the racks H0 and H1 have a parabolic roll shape. The working rolls of the rack H2 have a CVC roll shape. The frames F1 to F5 include support rolls and working rolls respectively. The support rolls of the frames F1 to F5 have a parabolic roll shape. The working rolls of the frames F1 and F2 have a CVC roll shape. The frames F3 to F5 have a single-sided tapered roll shape.

8. The frame of the endless rolling equipment according to claim 7, characterized in that: The working rolls of the roughing mill stand and the working rolls of the finishing mill stand both have the function of axial roll shifting.

9. The frame of the endless rolling equipment according to claim 8, characterized in that: The stroke range of the axial shifting of the working roll is 100 mm to 300 mm.

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