Silicon steel cold continuous rolling system

Abstract

The invention provides a silicon steel cold continuous rolling system, and relates to the technical field of rolling equipment, the silicon steel cold continuous rolling system comprises a cold continuous rolling unit, strip shape measuring rollers and an injection beam, the cold continuous rolling unit comprises a plurality of rolling mills which are arranged in sequence, and the strip shape measuring rollers are arranged at outlets of the two rolling mills at the two ends of the cold continuous rolling unit in the moving direction of silicon steel strips correspondingly; the strip shape measuring rollers are used for measuring the strip shape of the silicon steel strip rolled by the corresponding rolling mills, each rolling mill comprises a working roller, a spraying beam is arranged around the rolling mill, close to the tail end of the moving direction of the silicon steel strip, of the cold continuous rolling unit, and the extending direction of the spraying beam is consistent with that of the working roller of the rolling mill; a plurality of first nozzles are arranged on the spraying beam at intervals in the extending direction of the spraying beam, the plurality of first nozzles are respectively used for controlling and spraying cooling liquid to a working roller of the rolling mill, and the spraying beam is used for adjusting the amount of the cooling liquid sprayed by each first nozzle according to plate shape information measured by the plate shape measuring roller so as to enable the working roller to generate convexity deformation. The plate shape is simple and convenient to regulate and control, and the cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of rolling equipment, and in particular to a silicon steel cold rolling system. Background Art

[0002] Silicon steel, such as high-grade silicon steel with a silicon content greater than 3%, is usually rolled using a single-stand twenty-high mill. Since the mill requires multiple passes of rolling, the rolling parameters need to be readjusted for each pass, resulting in low rolling efficiency, a more complicated rolling process, and higher production costs. In addition, the quality of the rolled silicon steel strip is poor. Summary of the invention

[0003] The present invention aims to solve the technical problems of low rolling efficiency and poor rolling quality of silicon steel strip in the related art.

[0004] The present invention provides a silicon steel cold rolling system, comprising a cold rolling mill group, a plate shape measuring roller and a spray beam, wherein the cold rolling mill group comprises a plurality of rolling mills arranged in sequence, the plate shape measuring rollers are respectively arranged at the outlets of the two rolling mills at both ends of the cold rolling mill group along the moving direction of the silicon steel strip, the plate shape measuring rollers are used to measure the plate shape of the silicon steel strip after being rolled by the corresponding rolling mill, each of the rolling mills comprises a working roll, the spray beam is arranged around a rolling mill of the cold rolling mill group close to the tail end of the silicon steel strip in the moving direction, the spray beam is consistent with the extension direction of the working roll of the rolling mill, and the spray beam is spaced apart along the extension direction thereof with a plurality of first nozzles, the plurality of first nozzles are respectively controlled and used to spray coolant onto the working roll of the rolling mill, and the spray beam is used to adjust the amount of coolant sprayed by each of the first nozzles according to the plate shape information measured by the plate shape measuring roller, so as to cause the working roll to produce convex deformation.

[0005] Optionally, the plate shape measuring roller includes a measuring roller body and a pressure sensor, the measuring roller body is divided into a plurality of measuring sections along its extension direction, the working roller is divided into injection sections corresponding to a plurality of the first nozzles respectively along its extension direction, the measuring sections are arranged in a one-to-one correspondence with the injection sections, each of the measuring sections is provided with a pressure sensor, and the pressure sensor is used to contact the surface of the silicon steel strip.

[0006] Optionally, each of the rolling mills further includes an intermediate roll, a working roll bending hydraulic cylinder, a working roll transverse shift hydraulic cylinder, an intermediate roll bending hydraulic cylinder and an intermediate roll transverse shift hydraulic cylinder. The two working rolls are respectively provided with the intermediate rolls on the side away from each other. The working roll bending hydraulic cylinder is connected to the working roll driving to drive the working roll to bend and deform. The working roll transverse shift hydraulic cylinder is connected to the working roll driving to drive the working roll to move along its extension direction. The intermediate roll bending hydraulic cylinder is connected to the intermediate roll driving to drive the intermediate roll to bend and deform. The intermediate roll transverse shift hydraulic cylinder is connected to the intermediate roll driving to drive the intermediate roll to move along its extension direction.

[0007] Optionally, the plate shape measuring roller, the spray beam, the working roller bending hydraulic cylinder, the intermediate roller bending hydraulic cylinder and the intermediate roller transverse shifting hydraulic cylinder constitute a strip shape control system, and the working roller bending hydraulic cylinder and the intermediate roller bending hydraulic cylinder are used to adjust the bending degree of the working roller and the intermediate roller according to the plate shape information measured by the plate shape measuring roller; the intermediate roller transverse shifting hydraulic cylinder is used to adjust the position of the intermediate roller according to the plate shape information measured by the plate shape measuring roller.

[0008] Optionally, the silicon steel cold rolling system also includes a convexity meter and an edge drop meter, which are respectively arranged at both ends of the cold rolling mill along the moving direction of the silicon steel strip, and the convexity meter is used to measure the plate shape of the silicon steel strip entering the cold rolling mill, and the edge drop meter is used to measure the edge drop of the silicon steel strip coming out of the cold rolling mill.

[0009] Optionally, the convexity meter, the edge drop meter, the working roll bending hydraulic cylinder and the working roll transverse shift hydraulic cylinder constitute a strip edge drop control system, and the working roll bending hydraulic cylinder of each rolling mill is used to adjust the bending degree of the working roll according to the information measured by the convexity meter and the edge drop meter; the working roll transverse shift hydraulic cylinder is used to adjust the position of the working roll according to the information measured by the plate shape measuring roll.

[0010] Optionally, the silicon steel cold rolling system includes a thermometer and a spray pipe, the thermometer and the spray pipe constitute a strip temperature control system, the thermometer is arranged in a one-to-one correspondence with the rolling mill, each of the thermometers is located at the outlet side of the corresponding rolling mill, so as to measure the temperature of the silicon steel strip coming out of the corresponding rolling mill; the spray pipe has a plurality of second nozzles, and the outlet sides of the plurality of rolling mills of the cold rolling group close to the tail end of the moving direction of the silicon steel strip are respectively provided with the second nozzles, and the second nozzles are used to spray coolant onto the silicon steel strip.

[0011] Optionally, the silicon steel cold rolling system further includes a stretching roller, and a plurality of the stretching rollers are provided. The stretching rollers are provided on the side of the head end of the cold rolling mill group close to the moving direction of the silicon steel strip and between two adjacent rolling mills of the cold rolling mill group.

[0012] Optionally, the silicon steel cold rolling system also includes a uncoiler, an entrance looper and a heating device. Along the moving direction of the silicon steel strip, the uncoiler, the entrance looper and the cold rolling mill are arranged in sequence. The heating device is used to preheat the silicon steel strip. Two heating devices are provided, one of which is located between the uncoiler and the entrance looper, and the other is located between the entrance looper and the cold rolling mill.

[0013] Optionally, the silicon steel cold rolling system further comprises a straightener, a first scissors, a welder, a first tension roller, a second tension roller, a second scissors and a coiler, wherein along the moving direction of the silicon steel strip, the straightener, the first scissors, the welder and the first tension roller are sequentially arranged between the uncoiler and the entrance looper, the second tension roller is arranged between the entrance looper and the cold rolling mill group, and the second scissors and the coiler are sequentially arranged on the side of the cold rolling mill group away from the second tension roller; And / or, the cold rolling mill group includes six rolling mills arranged in sequence, each of the rolling mills has six rolls, including two working rolls, two intermediate rolls and two support rolls.

[0014] The silicon steel cold rolling system of the present invention has at least the following advantages compared with the related art: The multiple rolling mills of the cold rolling mill group can be rolling mills with a small number of rollers. Each rolling mill is arranged in sequence, and the silicon steel strip passes through each rolling mill in sequence to complete the rolling. By using multiple rolling mills with a small number of rollers for continuous rolling, each rolling mill does not need to roll multiple times, and the rolling efficiency is higher. The moving direction of the silicon steel strip is the setting direction of the multiple rolling mills. The two plate shape measuring rollers are respectively located at the exits of the two rolling mills at both ends of the cold rolling mill group along the moving direction of the silicon steel strip, that is, one of the plate shape measuring rollers is located at the exit of the head end rolling mill to measure the plate shape of the silicon steel strip after rolling by the head end rolling mill, and the other plate shape roller is located at the exit of the tail end rolling mill to measure the plate shape of the silicon steel strip after rolling by the multiple rolling mills arranged in sequence. The spray beam can adjust the coolant spray flow rate per unit time of each first nozzle according to the plate shape information measured by the plate shape measuring rollers at the exits of the head and tail end rolling mills, so that the cooling of the working rolls of the tail end rolling mill is inconsistent, and the faster cooling position will shrink, and the slower cooling position will expand, and finally This eventually causes the working roll to deform in convexity, and the silicon steel strip passes between the two working rolls of the rolling mill, causing the working roll to deform, that is, the plate shape of the silicon steel strip to deform, thereby achieving adjustment of the plate shape of the silicon steel strip, and observing the plate shape information measured by the plate shape measuring roll at the outlet of the tail rolling mill to determine whether the plate shape is adjusted to meet the requirements. The entire plate shape adjustment process is simple and convenient, and is conducive to ensuring the rolling quality. In addition, since each rolling mill will roll the silicon steel strip, it will affect its plate shape. By setting a spray beam around the working roll of the last rolling mill, it is only necessary to control the shape of the working roll of the last rolling mill to achieve regulation of the final plate shape. Not only is the plate shape control more convenient, but only one spray beam needs to be set, reducing equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a silicon steel cold rolling system according to an embodiment of the present invention; Figure 2 A schematic structural diagram of a rolling mill according to an embodiment of the present invention; Figure 3 This is a schematic structural diagram of a rolling mill without a frame according to an embodiment of the present invention; Figure 4 It is a structural schematic diagram of the injection amount of an embodiment of the present invention; Figure 5 Schematic diagram of the structure of the plate shape measuring roller according to an embodiment of the present invention.

[0016] Description of reference numerals: 1. Rolling mill; 101. Working roll; 102. Intermediate roll; 103. Working roll bending hydraulic cylinder; 104. Working roll lateral shift hydraulic cylinder; 105. Intermediate roll bending hydraulic cylinder; 106. Intermediate roll lateral shift hydraulic cylinder; 107. Support roll; 108. Frame; 2. Plate shape measuring roll; 201. Pressure sensor; 3. Spray beam; 301. First nozzle; 3011. Sub-nozzle; 4. Convexity meter; 5. Edge drop meter; 6. Thermometer; 7. Second nozzle; 8. Tension measuring roll; 9. Uncoiler; 10. Inlet looper; 11. Heating device; 12. Straightening machine; 13. First scissors; 14. Welding machine; 15. First tension roll; 16. Second tension roll; 17. Second scissors; 18. Coiler; 100. Silicon steel strip. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0018] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "matched" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In addition, it should be noted that in the description of the present invention, it should be noted that the terminology nouns in the various embodiments, such as "upper", "lower", "front", "back" and other words indicating directions, are only for simplifying the description of the positional relationship based on the drawings in the specification, and do not mean that the referred elements and devices must be operated in accordance with the specific directions and defined operations and methods and structures in the specification. Such directional nouns do not constitute limitations on the present invention.

[0020] An XYZ coordinate system is established herein. The Z axis represents the up and down direction, the positive direction of the Z axis represents the top, and the negative direction of the Z axis represents the bottom. It should also be noted that the aforementioned Z axis representation is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0021] like Figure 1 and Figure 4As shown, a silicon steel cold rolling system according to an embodiment of the present invention comprises a cold rolling mill group, a plate shape measuring roller 2 and a spray beam 3, wherein the cold rolling mill group comprises a plurality of rolling mills 1 arranged in sequence, and the plate shape measuring rollers 2 are respectively arranged at the outlets of two rolling mills 1 at both ends of the cold rolling mill group along the moving direction of the silicon steel strip 100, and the plate shape measuring rollers 2 are used to measure the plate shape of the silicon steel strip 100 after being rolled by the corresponding rolling mill 1, and each of the rolling mills 1 comprises a working roll 101, and the cold rolling mill group is close to the moving direction of the silicon steel strip 100. The spray beam 3 is provided around one of the rolling mills 1 at the tail end in the rolling direction, the spray beam 3 is consistent with the extension direction of the working roll 101 of the rolling mill 1, and the spray beam 3 is provided with a plurality of first nozzles 301 at intervals along its extension direction, the plurality of first nozzles 301 are respectively controlled and used to spray coolant to the working roll 101 of the rolling mill 1, the spray beam 3 is used to adjust the amount of coolant sprayed by each first nozzle 301 according to the plate shape information measured by the plate shape measuring roll 2, so as to cause the working roll 101 to produce convex deformation.

[0022] Specifically, the cold rolling mill group is provided with a plurality of rolling mills 1 in sequence along the X direction, and the number of rolling mills 1 included in the cold rolling mill group can be flexibly selected according to needs. Each rolling mill 1 includes two working rolls 101 arranged opposite to each other up and down, and the working rolls 101 are extended along the Y direction. The silicon steel strip 100 passes through the two working rolls 101 from one side of the rolling mill 1 and enters the other side of the rolling mill 1.

[0023] like Figure 4 As shown, the spray beam 3 is extended along the Y direction, and a plurality of first nozzles 301 are arranged at intervals along the Y direction on the spray beam 3, and each first nozzle 301 includes two sub-nozzles 3011 arranged up and down, and the two sub-nozzles 3011 spray coolant to the upper and lower working rolls 101 respectively, and each sub-nozzle 3011 is controlled by a corresponding valve respectively, and by controlling the opening of each valve respectively, the plurality of sub-nozzles 3011 can spray at different flow rates, so that the cooling of different parts of the working roll 101 is inconsistent. The flatness measuring roller 2 can adopt the existing technology, and the flatness measuring roller 2 can detect the flatness of the silicon steel strip 100 by a contact sensor or a non-contact sensor.

[0024] In this embodiment, the multiple rolling mills 1 of the cold rolling mill group can be rolling mills 1 with a smaller number of rolls. The rolling mills are arranged in sequence, and the silicon steel strip 100 passes through the rolling mills 1 in sequence to complete the rolling. By using multiple rolling mills 1 with a smaller number of rolls for continuous rolling, each rolling mill 1 does not need multiple rolling passes, and the rolling efficiency is higher. The moving direction of the silicon steel strip 100 is the setting direction of the multiple rolling mills 1. The two plate shape measuring rollers 2 are respectively located at the exits of the two rolling mills 1 at both ends of the cold rolling mill group along the moving direction of the silicon steel strip 100, that is, one of the plate shape measuring rollers 2 is located at the exit of the head end rolling mill to measure the plate shape of the silicon steel strip 100 after being rolled by the head end rolling mill, and the other plate shape roller is located at the exit of the tail end rolling mill to measure the plate shape of the silicon steel strip 100 after being rolled by the multiple rolling mills 1 arranged in sequence. The spray beam 3 can adjust the coolant spray flow rate per unit time of each first nozzle 301 according to the plate shape information measured by the plate shape measuring rollers 2 at the exits of the head and tail end rolling mills, so that the cooling of the working rolls 101 of the tail end rolling mill is inconsistent at various locations, the faster cooling position will shrink, and the slower cooling position will expand, which will eventually lead to the working Roller 101 undergoes convex deformation, and the silicon steel strip 100 passes between the two working rolls 101 of the rolling mill 1, and the working roll 101 is deformed, that is, the plate shape of the silicon steel strip 100 is deformed, so as to adjust the plate shape of the silicon steel strip 100, and observe the plate shape information measured by the plate shape measuring roll 2 at the outlet of the tail rolling mill to judge whether the plate shape is adjusted to meet the requirements. The whole plate shape adjustment process is simple and convenient, and is conducive to ensuring the rolling quality; in addition, since each rolling mill 1 will roll the silicon steel strip 100, it will affect its plate shape. By setting a spray beam 3 around the working roll 101 of the last rolling mill 1, it is only necessary to control the shape of the working roll 101 of the last rolling mill 1 to achieve the final plate shape control. Not only is the plate shape control more convenient, but only one spray beam 3 needs to be set, which reduces the equipment cost.

[0025] like Figure 5 As shown, optionally, the plate shape measuring roller 2 includes a measuring roller body and a pressure sensor 201, the measuring roller body is divided into a plurality of measuring sections along its extension direction, the working roller 101 is divided into injection sections corresponding to a plurality of the first nozzles 301 respectively along its extension direction, the measuring sections are arranged in a one-to-one correspondence with the injection sections, each of the measuring sections is provided with a pressure sensor 201, and the pressure sensor 201 is used to contact the surface of the silicon steel strip 100.

[0026] In this embodiment, the extension direction of the measuring roller body is also the Y direction, and the measuring roller body is divided into a plurality of measuring sections along the Y direction. The number of pressure sensors 201 is consistent with that of the measuring sections, and each measuring section is provided with a pressure sensor 201. Each pressure sensor 201 is used to measure the thickness of each section of the silicon steel strip 100 along the width direction. The working roller 101 of the rolling mill 1 is divided into a plurality of injection sections along its extension direction, and a plurality of first nozzles 301 of the injection beam 3 respectively spray coolant to the corresponding injection sections, and the injection sections of the working roller 101 are arranged one by one with the measuring sections of the measuring roller body. According to the pressure distribution of each section of the silicon steel strip 100 along the width direction measured by each pressure sensor 201 of the plate shape measuring roller 2, it is judged whether the plate shape of the silicon steel strip 100 meets the requirements. Since the injection section of the working roller 101 is arranged in a one-to-one correspondence with the measuring section of the measuring roller body, if the thickness of the silicon steel strip 100 measured by the pressure sensor 201 of a certain measuring section does not meet the requirements, the opening of the first nozzle 301 that injects coolant to the corresponding injection section is adjusted, so that the roll shape of the working roller 101 can be controlled, thereby achieving the plate shape control of the silicon steel strip 100.

[0027] like Figure 2-Figure 3 As shown, optionally, each of the rolling mills 1 further includes an intermediate roll 102, a working roll bending hydraulic cylinder 103, a working roll transverse shift hydraulic cylinder 104, an intermediate roll bending hydraulic cylinder 105 and an intermediate roll transverse shift hydraulic cylinder 106, the two working rolls 101 are respectively provided with the intermediate rolls 102 on the side away from each other, the working roll bending hydraulic cylinder 103 is drivingly connected to the working roll 101 to drive the working roll 101 to bend and deform, the working roll transverse shift hydraulic cylinder 104 is drivingly connected to the working roll 101 to drive the working roll 101 to move along its extension direction, the intermediate roll bending hydraulic cylinder 105 is drivingly connected to the intermediate roll 102 to drive the intermediate roll 102 to bend and deform, and the intermediate roll transverse shift hydraulic cylinder 106 is drivingly connected to the intermediate roll 102 to drive the intermediate roll 102 to move along its extension direction.

[0028] Specifically, the working roll bending hydraulic cylinder 103 is a double-axis hydraulic cylinder, and the two hydraulic rods can be extended and retracted vertically. The two hydraulic rods are respectively connected to the upper and lower working rolls 101, so that one working roll bending hydraulic cylinder 103 can be used to drive the two working rolls 101 at the same time. The force on the two working rolls 101 is more uniform, and the overall structure of the rolling mill 1 is simpler, the cost is lower, and the space occupied is smaller.

[0029] The working roll bending hydraulic cylinder 103 may be a working roll positive bending hydraulic cylinder or a working roll negative bending hydraulic cylinder, such as a working roll positive bending hydraulic cylinder is provided between one end of the two working rolls 101 along the positive direction of the Y axis, and a working roll positive bending hydraulic cylinder is provided between one end of the two working rolls 101 along the negative direction of the Y axis, and / or, a working roll negative bending hydraulic cylinder is provided between one end of the two working rolls 101 along the positive direction of the Y axis, and a working roll negative bending hydraulic cylinder is provided between one end of the two working rolls 101 along the negative direction of the Y axis. The working roll positive bending hydraulic cylinders at both ends work simultaneously to make the middle parts of the two working rolls 101 bulge toward the side away from each other, or the working roll negative bending hydraulic cylinders at both ends work simultaneously to make the middle parts of the two working rolls 101 concave toward the side close to each other.

[0030] One end of the working roll 101 along the Y direction is connected to the working roll transverse hydraulic cylinder 104, and the working roll transverse hydraulic cylinder 104 can push the working roll 101 to move along the Y direction to adjust the position of the working roll 101, and then adjust the shape of the rolled strip to meet different processing needs.

[0031] There are two intermediate rolls 102, which are arranged in parallel with each other and are both extended in the Y direction. The two intermediate rolls 102 are located on the side away from the two working rolls 101. The intermediate roll bending hydraulic cylinder 105 can be an intermediate roll positive bending hydraulic cylinder or an intermediate roll negative bending hydraulic cylinder. Both ends of each intermediate roll 102 in the Y direction are connected with an intermediate roll bending hydraulic cylinder 105. The intermediate roll bending hydraulic cylinder 105 can apply a driving force in the up-down direction to the intermediate roll 102, so that the middle part of the intermediate roll 102 is convex and bent upward or concave downward, thereby changing the force applied by the intermediate roll 102 to the working roll 101, so as to adjust the shape of the rolled strip and form it into a desired shape.

[0032] One end of the intermediate roller 102 along the Y direction is connected to the intermediate roller transverse hydraulic cylinder 106, and the intermediate roller transverse hydraulic cylinder 106 can push the intermediate roller 102 to move along the Y direction to adjust the position of the intermediate roller 102, and then adjust the shape of the rolled strip to meet different processing needs.

[0033] like Figure 1-Figure 3 As shown, optionally, the plate shape measuring roller 2, the spray beam 3, the working roller bending roller hydraulic cylinder 103, the intermediate roller bending roller hydraulic cylinder 105 and the intermediate roller transverse shifting hydraulic cylinder 106 constitute a strip plate shape control system, and the working roller bending roller hydraulic cylinder 103 and the intermediate roller bending roller hydraulic cylinder 105 are used to adjust the bending degree of the working roller 101 and the intermediate roller 102 according to the plate shape information measured by the plate shape measuring roller 2; the intermediate roller transverse shifting hydraulic cylinder 106 is used to adjust the position of the intermediate roller 102 according to the plate shape information measured by the plate shape measuring roller 2.

[0034] In this embodiment, based on the information measured by the plate shape measuring roller 2, by adjusting the injection flow rate of each first nozzle 301 of the injection beam 3, the working roll 101 of the rolling mill 1 at the tail end is bent and deformed to adjust the rolled shape of the silicon steel strip 100. At the same time, by adjusting the expansion and contraction amount in the working roll bending roll hydraulic cylinder 103, the intermediate roll bending roll hydraulic cylinder 105 and the intermediate roll transverse displacement hydraulic cylinder 106, the working roll 101 is bent and deformed, and the intermediate roll 102 is deformed or moved to adjust the plate shape of the rolled silicon steel strip 100. The plate shape adjustment range is larger and can better meet the use needs.

[0035] like Figure 1 As shown, optionally, the silicon steel cold rolling system also includes a convexity meter 4 and an edge drop meter 5, and the convexity meter 4 and the edge drop meter 5 are respectively arranged at both ends of the cold rolling mill along the moving direction of the silicon steel strip 100, and the convexity meter 4 is used to measure the plate shape of the silicon steel strip 100 entering the cold rolling mill, and the edge drop meter 5 is used to measure the edge drop of the silicon steel strip 100 coming out of the cold rolling mill.

[0036] Specifically, the convexity meter 4 and the edge drop meter 5 can directly adopt the existing technology. The convexity meter 4 can measure the thickness of each point of the silicon steel strip 100 along the width direction respectively to obtain the convexity simulation plate shape curve of the silicon steel strip 100. The convexity meter 4 is set at the inlet side of the cold rolling mill, that is, the side where the silicon steel strip 100 enters the cold rolling mill, and can measure the plate shape of the silicon steel strip 100 entering the cold rolling mill, that is, the initial plate shape, to provide reference data for subsequent plate shape adjustment.

[0037] The edge drop meter 5 is used to measure the inclination of the edge of the silicon steel strip 100, that is, the degree of deviation of the edge of the silicon steel strip 100 relative to the center line. The edge drop meter 5 is arranged on the exit side of the cold rolling mill. By observing the real-time measurement results of the edge drop meter 5, it can be determined whether the edge of the finally rolled strip is consistent with the process requirements, so as to make timely adjustments, which helps to prevent excessive edge drop from causing further processing problems.

[0038] like Figure 1 As shown, optionally, the convexity meter 4, the edge drop meter 5, the working roll bending hydraulic cylinder 103 and the working roll transverse shift hydraulic cylinder 104 constitute a strip edge drop control system, and the working roll bending hydraulic cylinder 103 of each rolling mill 1 is used to adjust the bending degree of the working roll 101 according to the information measured by the convexity meter 4 and the edge drop meter 5; the working roll transverse shift hydraulic cylinder 104 is used to adjust the position of the working roll 101 according to the information measured by the plate shape measuring roll 2.

[0039] In this embodiment, based on the plate shape information of the final product detected by the edge drop meter 5, it can be determined whether the design requirements are met. If not, the extension and retraction amount of the working roll bending hydraulic cylinder 103 and the intermediate roll bending hydraulic cylinder 105 of the rolling mill 1 can be adjusted according to the initial plate shape information detected by the convexity meter 4, so that the working roll 101 is bent and deformed and moves along the Y direction, and then the edge drop of the rolled silicon steel strip 100 is adjusted, and the plate shape adjustment is convenient.

[0040] like Figure 1 As shown, optionally, it also includes a thermometer 6 and a spray pipe, the thermometer 6 and the spray pipe constitute a strip temperature control system, the thermometer 6 is arranged one-to-one with the rolling mill 1, and each of the thermometers 6 is respectively located at the outlet side of the corresponding rolling mill 1 to measure the temperature of the silicon steel strip 100 coming out of the corresponding rolling mill 1; the spray pipe has a plurality of second nozzles 7, and the outlet sides of the plurality of rolling mills 1 of the cold rolling mill group close to the tail end of the moving direction of the silicon steel strip 100 are respectively provided with the second nozzles 7, and the second nozzles 7 are used to spray coolant to the silicon steel strip 100.

[0041] In this embodiment, the temperature meter 6 can be a temperature sensor, and coolant flows in the injection pipe. According to the rolling requirements of the silicon steel strip, the temperature needs to be increased in the first few rolling passes. The rolling temperature can be increased by adjusting the reduction amount and rolling speed of multiple rolling mills 1 near the head end of the moving direction of the silicon steel strip 100. In the subsequent rolling passes, the strip temperature needs to be lowered to facilitate winding by the coiler 18. Therefore, a second nozzle 7 is set on the outlet side of multiple rolling mills 1 near the tail end of the moving direction of the silicon steel strip 100 to quickly cool the strip.

[0042] Since only the subsequent rolling passes need to be cooled, that is, the number of second nozzles 7 in the injection pipeline is less than the number of rolling mills 1. For example, six rolling mills 1 are provided. Along the moving direction of the silicon steel strip 100, the six rolling mills 1 are rolling mill No. 1, rolling mill No. 2, rolling mill No. 3, rolling mill No. 4, rolling mill No. 5 and rolling mill No. 6, respectively. Three second nozzles 7 can be provided, one of which is located between rolling mill No. 3 and rolling mill No. 4, another second nozzle 7 is located between rolling mill No. 4 and rolling mill No. 5, and another second nozzle 7 is located between rolling mill No. 5 and rolling mill No. 6.

[0043] like Figure 1 As shown, optionally, the silicon steel cold rolling system also includes a stretching roller 8, and a plurality of the stretching rollers 8 are provided. The stretching rollers 8 are provided on the side of the head end of the cold rolling mill group close to the moving direction of the silicon steel strip 100 and between two adjacent rolling mills 1 of the cold rolling mill group.

[0044] Specifically, the stretch roller 8 includes a cylindrical stretch roller body and a sensor arranged thereon. The stretch roller body can contact the passing silicon steel strip 100. During the rolling process, along with the movement of the silicon steel strip 100, the sensor will continuously collect the working data of the stretch roller body, such as the rotation angle, deformation, etc., and the collected data will be processed and converted to obtain the tension of the silicon steel strip 100 at different positions, such as the inlet side of the cold rolling mill and between adjacent rolling mills 1, to ensure that the tension value of the silicon steel strip 100 during the production process is within a safe and effective range, thereby ensuring the safe progress of production.

[0045] like Figure 1 As shown, optionally, the silicon steel cold rolling system also includes a uncoiler 9, an entry looper 10 and a heating device 11. Along the moving direction of the silicon steel strip 100, the uncoiler 9, the entry looper 10 and the cold rolling mill are arranged in sequence. The heating device 11 is used to preheat the silicon steel strip 100. Two heating devices 11 are provided, one of which is located between the uncoiler 9 and the entry looper 10, and the other heating device 11 is located between the entry looper 10 and the cold rolling mill.

[0046] Specifically, two uncoilers 9 can be provided, and a silicon steel coil can be placed on each of the two uncoilers 9. The uncoilers 9 can uncoil the corresponding silicon steel coil. The entry looper 10 can not only guide the strip entering the cold rolling mill, but also be able to move or adjust freely. When the welder 14 welds the strip below, the strip stops being conveyed into the entry looper 10. At this time, by disassembling and adjusting the entry looper 10, the strip stored therein can be released and supplied to the cold rolling mill, thereby realizing continuous rolling of the cold rolling mill.

[0047] When the silicon steel strip 100 is a high-grade silicon steel strip, that is, when the high-grade silicon steel is rolled by a silicon steel cold rolling system, since the high-grade silicon steel has the characteristic of being brittle and easy to break, a heating device 11 is arranged between the uncoiler 9 and the entrance looper 10, so that the silicon steel strip 100 entering the entrance looper 10 can be preliminarily heated to about 50°C, thereby improving the plasticity of the silicon steel strip 100 and avoiding the silicon steel strip 100 from breaking due to repeated bending after entering the entrance looper 10; by arranging a heating device 11 between the entrance looper 10 and the cold rolling mill, the silicon steel strip 100 entering the cold rolling mill can be preheated to about 200°C, thereby further improving the plasticity of the silicon steel strip 100 and facilitating subsequent rolling.

[0048] Here, the heating device 11 may be an electromagnetic heating device, which can generate heat when powered on.

[0049] like Figure 1As shown, optionally, the silicon steel cold rolling system also includes a straightener 12, a first scissors 13, a welder 14, a first tension roller 15, a second tension roller 16, a second scissors 17 and a coiler 18. Along the moving direction of the silicon steel strip 100, the straightener 12, the first scissors 13, the welder 14 and the first tension roller 15 are sequentially arranged between the uncoiler 9 and the entrance looper 10, the second tension roller 16 is arranged between the entrance looper 10 and the cold rolling mill group, and the second scissors 17 and the coiler 18 are sequentially arranged on the side of the cold rolling mill group away from the second tension roller 16. The straightening machine 12 can straighten the head and tail of the silicon steel strip 100. The first scissors 13 and the second scissors 17 can be hydraulic shears. The first scissors 13 can cut off the unqualified part of the strip. Two uncoilers 9 are set. After the silicon steel coil on one uncoiler 9 is released, the silicon steel coil on the other uncoiler 9 begins to be released, and the strip head of the newly released silicon steel coil and the strip tail of the released silicon steel coil are welded at the welding machine 14, so as to achieve continuous rolling. The first tension roller 15 can increase the tension of the strip entering the entrance looper 10, and the second tension roller 16 can increase the tension of the strip entering the cold rolling unit. After the coiler 18 is rolled to a suitable coil diameter, the second scissors 17 shear the strip, and then the unloading trolley transports the steel coil away.

[0050] like Figure 2-Figure 3 As shown, optionally, the cold rolling mill group includes six rolling mills 1 arranged in sequence, each of which has six rolls, including two working rolls 101, two intermediate rolls 102 and two support rolls 107. The rolling mill 1 also includes a frame-type frame 108, and the working rolls 101, the intermediate rolls 102 and the support rolls 107 are all arranged inside the frame 108. The working rolls 101, the intermediate rolls 102 and the support rolls 107 extend along the Y direction and are relatively parallel. The sides of the two working rolls 101 that are away from each other are respectively provided with intermediate rolls 102, and the sides of the two intermediate rolls 102 that are away from each other are respectively provided with support rolls 107. The working rolls 101 of each rolling mill 1 can be designed with a small roll diameter. Compared with using five or less rolling mills 1, a cold rolling mill group using six rolling mills 1 can achieve a larger compression ratio and obtain a thinner silicon steel strip product. Compared with using seven or more rolling mills 1, a cold rolling mill group using six rolling mills 1 can avoid the problem of difficulty in rolling the silicon steel strip 100 due to excessive hardening and poor plasticity, as well as the problem of breakage at the edge of the silicon steel strip 100.

[0051] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A silicon steel cold rolling system, characterized in that: The invention comprises a cold rolling mill group, a plate shape measuring roller (2) and a spray beam (3), wherein the cold rolling mill group comprises a plurality of rolling mills (1) arranged in sequence, wherein the plate shape measuring rollers (2) are respectively arranged at the outlets of two rolling mills (1) at both ends of the cold rolling mill group along the moving direction of the silicon steel strip (100), wherein the plate shape measuring rollers (2) are used to measure the plate shape of the silicon steel strip (100) after being rolled by the corresponding rolling mill (1), wherein each rolling mill (1) comprises a working roller (101), and a rolling mill (101) of the cold rolling mill group close to the tail end of the moving direction of the silicon steel strip (100) 1), the spray beam (3) is arranged around the working roll (101) of the rolling mill (1), the spray beam (3) is consistent with the extension direction of the working roll (101) of the rolling mill (1), and the spray beam (3) is provided with a plurality of first nozzles (301) at intervals along the extension direction thereof, the plurality of first nozzles (301) are respectively controlled and used to spray coolant onto the working roll (101) of the rolling mill (1), and the spray beam (3) is used to adjust the amount of coolant sprayed by each of the first nozzles (301) according to the plate shape information measured by the plate shape measuring roll (2), so as to cause the working roll (101) to produce crown deformation.

2. The silicon steel cold rolling system according to claim 1, characterized in that: The plate shape measuring roller (2) comprises a measuring roller body and a pressure sensor (201); the measuring roller body is divided into a plurality of measuring sections along its extension direction; the working roller (101) is divided into spray sections corresponding to a plurality of the first nozzles (301) along its extension direction; the measuring sections are arranged in a one-to-one correspondence with the spray sections; each measuring section is provided with a pressure sensor (201); and the pressure sensor (201) is used to contact the surface of the silicon steel strip (100).

3. The silicon steel cold rolling system according to claim 1, characterized in that: Each rolling mill (1) further comprises an intermediate roll (102), a working roll bending hydraulic cylinder (103), a working roll transverse hydraulic cylinder (104), an intermediate roll bending hydraulic cylinder (105) and an intermediate roll transverse hydraulic cylinder (106); the two working rolls (101) are respectively provided with the intermediate rolls (102) on the sides away from each other; the working roll bending hydraulic cylinder (103) is drivingly connected to the working roll (101) to drive the working roll (101) to bend and deform; the working roll transverse hydraulic cylinder (104) is drivingly connected to the working roll (101) to drive the working roll (101) to move along its extension direction; the intermediate roll bending hydraulic cylinder (105) is drivingly connected to the intermediate roll (102) to drive the intermediate roll (102) to bend and deform; and the intermediate roll transverse hydraulic cylinder (106) is drivingly connected to the intermediate roll (102) to drive the intermediate roll (102) to move along its extension direction.

4. The silicon steel cold rolling system according to claim 3, characterized in that: The strip shape measuring roll (2), the spray beam (3), the working roll bending hydraulic cylinder (103), the intermediate roll bending hydraulic cylinder (105) and the intermediate roll transverse shift hydraulic cylinder (106) constitute a strip shape control system. The working roll bending hydraulic cylinder (103) and the intermediate roll bending hydraulic cylinder (105) are used to adjust the bending degrees of the working roll (101) and the intermediate roll (102) according to the strip shape information measured by the strip shape measuring roll (2); the intermediate roll transverse shift hydraulic cylinder (106) is used to adjust the position of the intermediate roll (102) according to the strip shape information measured by the strip shape measuring roll (2).

5. The silicon steel cold rolling system according to claim 3, characterized in that: It also includes a convexity meter (4) and an edge drop meter (5), the convexity meter (4) and the edge drop meter (5) are respectively arranged at the two ends of the cold rolling mill along the moving direction of the silicon steel strip (100), and the convexity meter (4) is used to measure the plate shape of the silicon steel strip (100) entering the cold rolling mill, and the edge drop meter (5) is used to measure the edge drop of the silicon steel strip (100) coming out of the cold rolling mill.

6. The silicon steel cold rolling system according to claim 5, characterized in that: The convexity meter (4), the edge drop meter (5), the working roll bending hydraulic cylinder (103) and the working roll transverse shift hydraulic cylinder (104) constitute a strip edge drop control system. The working roll bending hydraulic cylinder (103) of each rolling mill (1) is used to adjust the bending degree of the working roll (101) according to the information measured by the convexity meter (4) and the edge drop meter (5); the working roll transverse shift hydraulic cylinder (104) is used to adjust the position of the working roll (101) according to the information measured by the plate shape measuring roll (2).

7. The silicon steel cold rolling system according to claim 1, characterized in that: The invention also comprises a temperature measuring instrument (6) and a spraying pipeline, wherein the temperature measuring instrument (6) and the spraying pipeline constitute a strip temperature control system, wherein the temperature measuring instrument (6) is arranged in a one-to-one correspondence with the rolling mill (1), and each temperature measuring instrument (6) is respectively located at the outlet side of the corresponding rolling mill (1) to measure the temperature of the silicon steel strip (100) coming out of the corresponding rolling mill (1); the spraying pipeline has a plurality of second nozzles (7), and the outlet sides of the plurality of rolling mills (1) of the cold rolling mill group close to the tail end in the moving direction of the silicon steel strip (100) are respectively provided with the second nozzles (7), and the second nozzles (7) are used to spray cooling liquid onto the silicon steel strip (100).

8. The silicon steel cold rolling system according to claim 1, characterized in that: It also comprises a stretching roller (8), a plurality of which are provided, and the stretching roller (8) is provided on one side of the front end of the cold rolling mill group close to the moving direction of the silicon steel strip (100) and between two adjacent rolling mills (1) of the cold rolling mill group.

9. The silicon steel cold rolling system according to claim 1, characterized in that: The invention also comprises an uncoiler (9), an inlet looper (10) and a heating device (11). The uncoiler (9), the inlet looper (10) and the cold rolling mill are arranged in sequence along the moving direction of the silicon steel strip (100). The heating device (11) is used to preheat the silicon steel strip (100). Two heating devices (11) are provided, one of which is located between the uncoiler (9) and the inlet looper (10), and the other of which is located between the inlet looper (10) and the cold rolling mill.

10. The silicon steel cold rolling system according to claim 9, characterized in that: It also comprises a straightener (12), a first shear (13), a welder (14), a first tension roller (15), a second tension roller (16), a second shear (17) and a coiler (18); along the moving direction of the silicon steel strip (100), the straightener (12), the first shear (13), the welder (14) and the first tension roller (15) are sequentially arranged between the uncoiler (9) and the entry looper (10); the second tension roller (16) is arranged between the entry looper (10) and the cold rolling mill; and the second shear (17) and the coiler (18) are sequentially arranged on a side of the cold rolling mill away from the second tension roller (16); And / or, the cold rolling mill group comprises six rolling mills (1) arranged in sequence, each of the rolling mills (1) having six rolls, including two working rolls (101), two intermediate rolls (102) and two support rolls (107).

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