A cold-rolled steel strip forming equipment with thickness detection function

Abstract

The present invention relates to the technical field of steel strip production, and specifically to a cold-rolled steel strip forming equipment with a thickness detection function. The forming equipment comprises a frame, a finishing roll group, a spacing frame, a finishing drive, a roughing roll group, and a roughing drive. The frame is placed vertically, the finishing roll group is installed on the frame, the roller axis of the finishing roll group is horizontal, the spacing frame is arranged on the top of the frame, the spacing frame is connected to the rotating mounting component at the end of the finishing roll group, the spacing frame adjusts the roller center distance of the finishing roll group, the finishing drive is arranged on the side of the frame, and the finishing drive is connected to the finishing roll group by transmission; the steel strip to be processed passes through the middle of the finishing roll group, and the steel strip produced by the finishing roll group has a curvature. The finishing roll group comprises an upper roll and a lower roll, the upper roll and the lower roll are respectively connected to the frame for rotation, the upper roll is located directly above the lower roll, and the upper roll and the lower roll have different linear speeds at the meshing gap. The roughing roll group is arranged on the frame, the roughing drive is arranged on the side of the frame, and the roller spacing in the roughing roll group is smaller than that of the finishing roll group.

Description

Technical Field

[0001] The invention relates to the technical field of steel strip production, in particular to cold-rolled steel strip forming equipment with a thickness detection function. Background Art

[0002] Steel strips are increasingly used in industry, such as packaging, surface protection of equipment components, or as raw materials for processing other components. They have many uses in the fields of construction, automobiles, and machinery.

[0003] When steel strips are produced, they generally go through multiple processes. The basic processes are: raw material preparation, heating treatment below the recrystallization temperature, rolling into coils, pickling and drying, and then cold rolling. In the cold rolling stage, if the deformation is large, it is necessary to undergo multiple annealing treatments. Some steel strips are not heat treated after finishing rolling, because heat treatment reduces the strength of the steel strip and affects its use. Therefore, the internal stress of the steel strip in the cold rolling process is often annealed before the last finishing rolling step to remove it. After the last cold rolling, it is directly rolled and bundled, inspected and put into storage, waiting for transportation and transfer. This type of steel strip is straight before rolling. After winding, the inner and outer surface lengths of the steel strip have a slight difference, resulting in deformation stress. If the fixing measures during storage and transportation fail, the steel strip will quickly spread out, causing danger to the surrounding area. Summary of the invention

[0004] The object of the present invention is to provide a cold-rolled steel strip forming device with a thickness detection function to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A cold-rolled steel strip forming equipment with a thickness detection function, the forming equipment comprising a frame, a finishing roll group, a spacing frame, and a finishing drive. The frame is placed vertically, the finishing roll group is installed on the frame, the roller axis of the finishing roll group is horizontal, the spacing frame is arranged on the top of the frame, the spacing frame is connected to the rotating installation component at the end of the finishing roll group, the spacing frame adjusts the roller center distance of the finishing roll group, the finishing drive is arranged on the side of the frame, and the finishing drive is connected to the finishing roll group in a transmission manner; the steel strip to be processed passes through the middle of the finishing roll group, and the steel strip rolled by the finishing roll group has an arc.

[0007] The steel strip to be rolled enters the meshing gap between the rollers of the finishing roller group. The originally thick steel strip is squeezed and stretched into a thin layer and transported backward. The steel strip processed by the finishing roller group of this application has a slight curvature, and the curvature is close to the curvature during subsequent winding, which reduces the bending stress during winding. The internal stress of the steel strip after winding is small, and the corresponding built-in potential energy is also small. Even if the effectiveness of the bundling and fixing measures is reduced, the danger is greatly reduced. The spacing frame is used to adjust the roller spacing and control the thickness of the output steel strip. No adjustment is performed within a single operating cycle. When the working conditions are changed and steel strips of other sizes need to be rolled, the machine will be stopped for adjustment.

[0008] The forming equipment also includes a roughing roll group and a roughing drive. The roughing roll group is arranged on the frame, the roughing drive is arranged on the side of the frame, the roughing drive is connected to the roughing roll group by transmission, the roller spacing in the roughing roll group is larger than that in the finishing roll group, and the forming equipment also includes a plurality of guide rollers. The guide rollers are arranged beside the frame, and the guide rollers are used for the rotation and bending support of the steel strip from the roughing roll group to the finishing roll group.

[0009] The thicker steel strip first enters the roughing roll group for initial cold rolling, and the thickness becomes the intermediate thickness. After bypassing several guide rolls, it enters the finishing roll group for final thickness cold rolling. The steel strip uses a larger turning radius between the two roll groups as much as possible to prevent damage caused by small radius bending. Under a larger bending radius, the guide roll is not convenient to be integrated into the frame, so it is installed independently. A corresponding mounting frame is set at a farther position of the frame, and a suitable placement position is selected according to site conditions. If the steel strip at the roughing roll group is to undergo a larger deformation, an annealing structure can be set on the rotating bending path, such as a furnace body. Annealing is completed during the feeding process between the two roll groups to soften the hard grains and eliminate lattice distortion in preparation for finishing rolling.

[0010] The finishing roll group includes an upper roll and a lower roll, which are respectively connected to the frame for rotation. The upper roll is located directly above the lower roll, and the upper roll and the lower roll have different linear speeds at the meshing gap.

[0011] The upper roller contacts the upper surface of the steel strip and extrude the upper metallographic structure of the extended steel strip, while the lower roller extrude the lower metallographic structure of the steel strip. There is a slight difference in the speed of the upper and lower layers, which directly produces an arc length difference between the upper and lower surfaces on the rear steel strip after the extension output. By controlling the arc length difference ratio of the upper and lower surfaces of the output steel strip and tending to the ratio during subsequent coiling, the internal stress after coiling can be reduced. In addition, when the steel strip is coiled, the degree of bending at the small radius is different from that at the large radius, and the arc length difference ratio of the two sides is also different at the large radius and the small radius. Therefore, this factor can also be taken into account during cold rolling, and the linear speed difference ratio of the upper roller and the lower roller must be able to change continuously.

[0012] The finishing rolling drive includes a bracket, a main motor, a reduction box, and a differential box. The bracket is fixed on the side of the frame, and a reduction box is arranged on the side of the bracket away from the frame. The main motor is arranged at the input end of the reduction box. The reduction box has two output ends, and the two output ends are respectively connected to the ends of the upper roller and the lower roller. A differential box is arranged on one of the transmission paths between the reduction box and the upper roller or the lower roller, and the differential box can infinitely adjust the speed difference between the input and the output.

[0013] The reduction box outputs the rotational power obtained from the main motor, and matches the corresponding speed output according to the diameter difference between the upper roller and the lower roller. When the differential box is not in effect, the upper roller and the lower roller have the same linear speed at the meshing point. The differential box is used to fine-tune the speed of a certain roller. The differential box adopts a solution similar to that of a car differential, but only adjusts the power distribution. This application requires the differential to accurately control the difference between the input and output speeds.

[0014] The finishing drive also includes a speed matching motor. The differential case includes a housing, an input shaft, an output shaft, a public rotating disk, an intermediate gear, and a speed matching gear. The housing is fixed to a bracket. The input shaft and the output shaft both pass through the housing. The input shaft and the output shaft are rotatably connected to the housing and their axes are in line. The public rotating disk is rotatably connected to the input shaft and the output shaft respectively. Bevel gears are respectively arranged at the ends of the input shaft and the output shaft that are close to each other. An intermediate gear is rotatably arranged on the public rotating disk. The rotation axis of the intermediate gear is perpendicular to the input shaft. The intermediate gear is respectively meshed with the gears at the ends of the input shaft and the output shaft. Teeth are also arranged on the public rotating disk. The teeth on the public rotating disk take the input shaft as the axis. The speed matching gear is rotatably installed on the housing. The speed matching gear is meshed with the public rotating disk. The speed matching motor is installed on the bracket. The speed matching motor is directly connected to the speed matching gear.

[0015] One end of the input shaft away from the revolving disk is connected to the reduction box, and one end of the output shaft away from the revolving disk is connected to the upper roller or the lower roller.

[0016] When the speed matching motor stops and self-locks, the speed matching gear and the public rotating plate cannot move. At this time, the rotation on the input shaft will be completely transmitted to the output shaft through the intermediate gear, and a one-to-one transmission is performed. When the speed matching motor rotates slightly, the speed matching gear drives the public rotating plate to rotate slightly. At this time, the transmission ratio of the intermediate gear to transmit the input shaft to the output shaft is no longer 100%, but a speed difference appears. By adjusting the speed of the public rotating plate, the difference between the input shaft speed and the output shaft speed can be changed to achieve precise adjustment. The difference between the differential case of the present application and the differential in the car is mainly that there are two inputs and one output, and the differential control is achieved by the input speed of the speed matching motor, while the car has one input and two outputs.

[0017] The finishing drive also includes an extension shaft, which is used to connect the coupling space from the reduction box to the upper roll or the lower roll.

[0018] Because it is necessary to add a differential box in the space between the reduction box and the upper and lower rollers, the lower roller cannot be directly connected to the reduction box. It is connected through an extended shaft, and the joints are connected through a universal coupling. Because the center distance between the upper and lower rollers needs to be adjusted according to the thickness requirements of the steel strip, and the center distance between the two output heads of the reduction box is difficult to adjust, a universal coupling is added to the transmission path for coordination.

[0019] The finishing rolling drive also includes an auxiliary frame, the lower end of the auxiliary frame is placed on the foundation, and the upper part of the auxiliary frame is connected to the bracket and the main motor.

[0020] The auxiliary frame provides additional support for the remaining components of the finishing drive to avoid the center of gravity shifting due to suspended installation.

[0021] The two rollers in the roughing roller group are installed in an up and down floating manner. The floating amount of the gap between the two rollers in the roughing roller group is 20~60% of the design value, and the two rollers have a pre-tightening force to move closer to each other. Force sensors are set at the ends of the two rollers in the floating direction. The force sensors detect the size of the forced force that moves the two rollers of the roughing roller group away from each other and transmit signals to the speed control motor.

[0022] As the first cold rolling position, the roughing roll group can allow a large error in size. The floating rollers with approaching preload can sense the reaction force of the steel strip at the roughing meshing position. If the reaction force is large, the roughing rolls are moved away from each other by a certain distance to expand the roughing gap. In this case, a dense metallographic structure will appear on the surface of the steel strip. In the subsequent finishing meshing position, the material here can be slightly stretched. When the lower roller encounters the dense part, the speed is slightly increased than expected, so that the dense part at the lower layer is pulled and stretched more, the dense part is eliminated, and the metallographic structure of the produced steel strip is uniform.

[0023] The diameter of the steel strip that rotates and bends between the roughing roll group and the finishing roll group is two thousand times or more of its own thickness.

[0024] By setting the positions of several guide rollers, the turning radius of the steel strip between two cold rolling positions can be adjusted. A larger radius prevents local bending and damage to the steel strip. In this application, the turning diameter is more than two thousand times greater than the thickness.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: the present application allows the steel strip to undergo two cold deformation processes through the combination of a roughing roll group and a finishing roll group, and the thickness error is smaller; the two meshing wheels at the finishing roll group both have active speed input, and the two rollers rotate at the designed speed. The slight linear speed difference at the meshing point can allow the steel strip to directly tend to the difference in arc lengths of the upper and lower surfaces during subsequent winding, greatly reducing the bending internal stress after winding, and annealing after winding is no longer a necessary process, retaining a high strength until the use stage. The speed adjustment of the two rollers in the finishing roll group is precisely controlled by a motor, and is steplessly and continuously adjusted, without the need to configure a multi-ratio gear group for group transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall appearance of the present invention;

[0027] Figure 2 It is a front view of the present invention;

[0028] Figure 3 for Figure 2 The cutaway view AA in FIG. 1 is shown, and the schematic structure of the steel belt rotary guide is added;

[0029] Figure 4 It is a schematic diagram of the cold rolling process of the steel strip at the meshing position of the upper roll and the lower roll of the present invention;

[0030] Figure 5 Schematic diagram of the difference in arc length between the inner and outer surfaces of the coiled steel strip of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the differential case of the present invention without the outer shell;

[0032] In the figure: 1, frame; 21, roughing roll group; 22, finishing roll group; 221, upper roll; 222, lower roll; 3, spacing frame; 4, roughing drive; 5, finishing drive; 51, bracket; 52, main motor; 53, reduction gear box; 54, differential box; 541, input shaft; 542, output shaft; 543, revolving plate; 544, intermediate gear; 545, matching gear; 55, extension shaft; 56, matching motor; 57, auxiliary frame; 8, guide roller; 9, steel belt; 91, compacting part. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0034] A cold-rolled steel strip forming equipment with a thickness detection function, the forming equipment comprising a frame 1, a finishing roll group 22, a spacing frame 3, and a finishing drive 5. The frame 1 is placed vertically, the finishing roll group 22 is installed on the frame 1, the roller axis of the finishing roll group 22 is horizontal, the spacing frame 3 is arranged on the top of the frame 1, the spacing frame 3 is connected to the rotating installation component at the end of the finishing roll group 22, the spacing frame 3 adjusts the roller center distance of the finishing roll group 22, the finishing drive 5 is arranged on the side of the frame 1, and the finishing drive 5 is connected to the finishing roll group 22 in transmission; the steel strip 9 to be processed passes through the middle of the finishing roll group 22, and the steel strip rolled by the finishing roll group 22 has a curvature.

[0035] like Figure 1 , 4 As shown in Figure 5, the steel strip 9 to be rolled enters the meshing gap between the rollers of the finishing roller group 22. The originally thick steel strip is squeezed and stretched into a thin layer and transported backward. The steel strip processed by the finishing roller group 22 of the present application has a slight curvature, and the curvature is close to the curvature during subsequent winding, which reduces the bending stress during winding. The internal stress of the steel strip after winding is small, and the corresponding built-in potential energy is also small. Even if the effectiveness of the bundling and fixing measures is reduced, the danger is greatly reduced. The spacing frame 3 is used to adjust the roller spacing and control the thickness of the output steel strip. No adjustment is performed within a single operating cycle. When the working condition is changed and steel strips of other sizes need to be rolled, the machine is stopped for adjustment.

[0036] The forming equipment also includes a roughing roll group 21 and a roughing drive 4. The roughing roll group 21 is arranged on the frame 1, and the roughing drive 4 is arranged on the side of the frame 1. The roughing drive 4 is connected to the roughing roll group 21 by transmission. The roller spacing in the roughing roll group 21 is greater than that of the finishing roll group 22. The forming equipment also includes a plurality of guide rollers 8. The guide rollers 8 are arranged next to the frame 1. The guide rollers 8 are used for the rotational bending support of the steel strip 9 from the roughing roll group 21 to the finishing roll group 22.

[0037] like Figure 2 , 3 As shown, the thicker steel strip 9 first enters the roughing roller group 21 for initial cold rolling, and the thickness becomes the intermediate thickness. After bypassing several guide rollers 8, it enters the finishing roller group 22 for final thickness cold rolling. The steel strip 9 uses a larger turning radius between the two roller groups as much as possible to prevent damage caused by small radius bending. Under a larger bending radius, the guide roller 8 is not convenient to be integrated into the frame 1, so an independent installation is adopted. A corresponding mounting frame is set at a farther position of the frame 1, and a suitable placement position is selected according to the site conditions. If the steel strip 9 at the roughing roller group 21 is to undergo a larger deformation, an annealing structure can be set on the rotating bending path, such as a furnace body. Annealing is completed during the feeding process between the two roller groups to soften the hard grains and eliminate lattice distortion, in preparation for finishing rolling.

[0038] The finishing roll group 22 includes an upper roll 221 and a lower roll 222. The upper roll 221 and the lower roll 222 are rotatably connected to the frame 1 respectively. The upper roll 221 is located directly above the lower roll 222. The upper roll 221 and the lower roll 222 have different linear speeds at the meshing gap.

[0039] like Figure 2 , 4As shown, the upper roller 221 contacts the upper surface of the steel strip 9 and squeezes and stretches the upper metallographic structure of the steel strip 9, while the lower roller 222 squeezes the lower metallographic structure of the steel strip 9. The upper and lower layer speeds have a slight difference, which directly generates an arc length difference between the upper and lower surfaces on the rear steel strip 9 after the stretching output. By controlling the arc length difference ratio of the upper and lower surfaces of the output steel strip 9 and tending to the ratio during subsequent winding, the internal stress after winding can be reduced. In addition, when the steel strip is wound, the bending degree at the small radius is different from that at the large radius, and the arc length difference ratio of the two sides is between the large radius and the small radius. For example, for a steel coil with a maximum outer diameter of 1000mm after coiling, a central support tube diameter of 400mm, and a steel strip thickness of 0.5mm, for the same section of material in the outer layer, the difference ratio of the arc length of the outer surface to the arc length of the inner surface is about one thousandth, and the difference ratio of the arc length difference divided by the outer arc length is about two thousandths. Therefore, this factor can also be taken into account during cold rolling, and the linear speed difference ratio of the upper roller 221 and the lower roller 222 should vary continuously from one thousandth to two thousandths.

[0040] The finishing drive 5 includes a bracket 51, a main motor 52, a reduction box 53, and a differential box 54. The bracket 51 is fixed to the side of the frame 1. The reduction box 53 is arranged on the side of the bracket 51 away from the frame 1. The main motor 52 is arranged at the input end of the reduction box 53. The reduction box 53 has two output ends, and the two output ends are respectively connected to the ends of the upper roller 221 and the lower roller 222 by transmission. The differential box 54 is arranged on one of the transmission paths between the reduction box 53 and the upper roller 221 or the lower roller 222. The differential box 54 can infinitely adjust the speed difference between the input and the output.

[0041] The reduction box 53 outputs the rotational power obtained from the main motor 52, and matches the corresponding speed output according to the diameter difference between the upper roller 221 and the lower roller 222. When the differential box 54 does not work, the upper roller 221 and the lower roller 222 have the same linear speed at the meshing point. The differential box 54 is used to fine-tune the speed of a certain roller. Figure 2 The solution of adjusting the upper roller 221 is adopted, and the differential case 54 adopts a solution similar to that of a car differential, except that the power distribution is adjusted. This application requires the differential to accurately control the difference between the input and output speeds.

[0042] The finishing drive 5 also includes a speed matching motor 56, and the differential case 54 includes a housing, an input shaft 541, an output shaft 542, a public rotating disk 543, an intermediate gear 544, and a speed matching gear 545. The housing is fixed to the bracket 51, and the input shaft 541 and the output shaft 542 both pass through the housing. The input shaft 541 and the output shaft 542 are rotatably connected to the housing and the axes are colinear. The public rotating disk 543 is rotatably connected to the input shaft 541 and the output shaft 542 respectively, and bevel gears are respectively arranged at the ends of the input shaft 541 and the output shaft 542 that are close to each other. An intermediate gear 544 is rotatably arranged on the revolution disk 543, and the rotation axis of the intermediate gear 544 is perpendicular to the input shaft 541. The intermediate gear 544 is meshed with the end gears of the input shaft 541 and the output shaft 542 respectively. Teeth are also arranged on the revolution disk 543, and the teeth on the revolution disk 543 are axially connected to the input shaft 541. A speed matching gear 545 is rotatably arranged on the housing, and the speed matching gear 545 is meshed with the revolution disk 543. A speed matching motor 56 is arranged on the bracket 51, and the speed matching motor 56 is directly connected with the speed matching gear 545.

[0043] One end of the input shaft 541 away from the revolving disk 543 is connected to the reduction box 53 , and one end of the output shaft 542 away from the revolving disk 543 is connected to the upper roller 221 or the lower roller 222 .

[0044] like Figure 2 , 6 As shown, when the speed matching motor 56 stops and self-locks, the speed matching gear 545 and the public rotating disk 543 cannot move. At this time, the rotation on the input shaft 541 will be completely transmitted to the output shaft 542 via the intermediate gear 544, and a one-to-one transmission is performed. When the speed matching motor 56 rotates slightly, the speed matching gear 545 drives the public rotating disk 543 to rotate slightly. At this time, the transmission ratio of the intermediate gear 544 transmitting the input shaft 541 to the output shaft 542 is no longer 100%, but a speed difference appears. By adjusting the size of the speed W3 of the public rotating disk 543, the difference between the speed W1 of the input shaft 541 and the speed W2 of the output shaft 542 can be changed to achieve precise adjustment. The difference between the differential case of the present application and the differential in the car is mainly that there are two inputs and one output, and the differential control is achieved by the input speed W4 of the speed matching motor 56, while the car has one input and two outputs.

[0045] The finishing drive 5 further includes an extended shaft 55 , which is used to connect the reduction box 53 to the coupling space of the upper roller 221 or the lower roller 222 .

[0046] like Figure 2As shown, because it is necessary to add a differential case 54 in the space between the reduction box 53 and the upper roller 221 and the lower roller 222, the lower roller 222 cannot be directly connected to the reduction box 53, and is connected through an extension shaft 55. The joints are connected through a universal coupling. Because the center distance between the upper roller 221 and the lower roller 222 needs to be adjusted according to the thickness requirements of the steel strip, and the center distance between the two output heads of the reduction box 53 is difficult to adjust, a universal coupling is added to the transmission path for coordination.

[0047] The finishing drive 5 further comprises an auxiliary frame 57 , the lower end of the auxiliary frame 57 is placed on the foundation, and the upper part of the auxiliary frame 57 is connected to the bracket 51 and the main motor 52 .

[0048] The auxiliary frame 57 provides additional support for the remaining components of the finishing drive 5 to avoid the center of gravity shifting due to the suspended installation.

[0049] The two rollers in the roughing roller group 21 are installed in an up and down floating manner, and the floating amount of the gap between the two rollers in the roughing roller group 21 is 20~60% of the design value, and the two rollers have a pre-tightening force to move closer to each other. Force sensors are set at the ends of the two rollers in the floating direction. The force sensors detect the size of the forced force that moves the two rollers of the roughing roller group 21 away from each other and transmit signals to the speed control motor 56.

[0050] like Figure 2 , 3 As shown in 4, the roughing roller group 21 is used as the first cold rolling position, and the size can allow a large error. The rollers with floating installation and close preload can sense the reaction force of the steel strip at the rough rolling meshing position. If the reaction force is large, the roughing rollers are moved away from each other by a certain distance to expand the rough rolling gap, and a dense part 91 of the metallographic structure appears on the surface of the steel strip at this point. At the subsequent fine rolling meshing position, the material here can be slightly stretched, that is, Figure 4 In the process, when the lower roller 222 encounters the dense portion 91, the rotation speed is slightly increased than expected, so that the dense portion at the lower layer is pulled and stretched more, the dense portion is eliminated, and the metallographic structure of the produced steel strip is uniform.

[0051] The diameter of the steel strip 9 that is bent and rotated between the roughing roll set 21 and the finishing roll set 22 is two thousand times or more of its own thickness.

[0052] like Figure 3 As shown, by setting the positions of several guide rollers 8, the turning radius of the steel strip between two cold rolling positions can be adjusted. A larger radius prevents local bending and damage of the steel strip. In this application, the turning diameter is more than two thousand times greater than the thickness.

[0053] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A cold-rolled steel strip forming equipment with thickness detection function, characterized in that: The forming equipment comprises a frame (1), a finishing roller group (22), a spacing frame (3), and a finishing drive (5); the frame (1) is placed vertically, the finishing roller group (22) is installed on the frame (1), the roller axis of the finishing roller group (22) is horizontal, the spacing frame (3) is arranged on the top of the frame (1), the spacing frame (3) is connected to the rotating mounting component at the end of the finishing roller group (22), the spacing frame (3) adjusts the roller center distance of the finishing roller group (22), the finishing drive (5) is arranged on the side of the frame (1), and the finishing drive (5) is connected to the finishing roller group (22) in a transmission manner; the steel strip (9) to be processed passes through the middle of the finishing roller group (22), and the steel strip rolled by the finishing roller group (22) has a curvature; The forming equipment further comprises a roughing roll group (21) and a roughing drive (4), wherein the roughing roll group (21) is arranged on the frame (1), the roughing drive (4) is arranged on the side of the frame (1), the roughing drive (4) is connected to the roughing roll group (21) in a transmission manner, the distance between the rollers in the roughing roll group (21) is greater than that in the finishing roll group (22), and the forming equipment further comprises a plurality of guide rollers (8), wherein the guide rollers (8) are arranged beside the frame (1), and the guide rollers (8) are used for supporting the rotation and bending of the steel strip (9) from the roughing roll group (21) to the finishing roll group (22); The finishing roller group (22) comprises an upper roller (221) and a lower roller (222), wherein the upper roller (221) and the lower roller (222) are respectively rotatably connected to the frame (1), the upper roller (221) is located directly above the lower roller (222), and the upper roller (221) and the lower roller (222) have different linear velocities at the meshing gap; The finishing drive (5) comprises a support (51), a main motor (52), a reduction box (53), and a differential box (54); the support (51) is fixed to a side of a frame (1); a reduction box (53) is arranged on a side of the support (51) away from the frame (1); the main motor (52) is arranged at an input end of the reduction box (53); the reduction box (53) has two output ends, and the two output ends are respectively connected to the ends of an upper roller (221) and a lower roller (222) in a driving manner; a differential box (54) is arranged on one of the transmission paths between the reduction box (53) and the upper roller (221) or the lower roller (222); and the differential box (54) can infinitely adjust the speed difference between the input and the output.

2. The cold-rolled steel strip forming equipment with thickness detection function according to claim 1 is characterized in that: The finishing drive (5) further comprises a speed matching motor (56); the differential case (54) comprises a housing, an input shaft (541), an output shaft (542), a rotating disk (543), an intermediate gear (544), and a speed matching gear (545); the housing is fixed to the bracket (51); the input shaft (541) and the output shaft (542) both pass through the housing; the input shaft (541) and the output shaft (542) are rotatably connected to the housing and their axes are colinear; the rotating disk (543) is rotatably connected to the input shaft (541) and the output shaft (542), respectively; and conical ends of the input shaft (541) and the output shaft (542) are respectively provided. gear, an intermediate gear (544) is rotatably arranged on the revolving disk (543), the rotation axis of the intermediate gear (544) is perpendicular to the input shaft (541), the intermediate gear (544) is respectively meshed with the end gears of the input shaft (541) and the output shaft (542), the revolving disk (543) is also provided with teeth, the teeth on the revolving disk (543) are oriented with the input shaft (541) as the axis, the speed matching gear (545) is rotatably arranged on the housing, the speed matching gear (545) is meshed with the revolving disk (543), the speed matching motor (56) is arranged on the bracket (51), and the speed matching motor (56) is directly connected to the speed matching gear (545); One end of the input shaft (541) away from the revolving disk (543) is connected to the reduction box (53), and one end of the output shaft (542) away from the revolving disk (543) is connected to the upper roller (221) or the lower roller (222).

3. The cold-rolled steel strip forming equipment with thickness detection function according to claim 1, characterized in that: The finishing drive (5) further comprises an extension shaft (55), wherein the extension shaft (55) is used to connect the coupling space from the reduction box (53) to the upper roller (221) or the lower roller (222).

4. The cold-rolled steel strip forming equipment with thickness detection function according to claim 1, characterized in that: The finishing drive (5) further comprises an auxiliary frame (57), the lower end of the auxiliary frame (57) being placed on a foundation, and the upper part of the auxiliary frame (57) being connected to the bracket (51) and the main motor (52).

5. The cold-rolled steel strip forming equipment with thickness detection function according to claim 2, characterized in that: The two rollers in the roughing roller group (21) are installed in an up-and-down floating manner, the floating amount of the gap between the two rollers in the roughing roller group (21) is 20-60% of the design value, and the two rollers have a pre-tightening force to move closer to each other. Force sensors are arranged at the ends of the two rollers in the floating direction, and the force sensors detect the magnitude of the force that forces the two rollers of the roughing roller group (21) to move away from each other and transmit a signal to the speed control motor (56).

6. The cold-rolled steel strip forming equipment with thickness detection function according to claim 1, characterized in that: The diameter of the steel strip (9) that is rotated and bent between the roughing roll group (21) and the finishing roll group (22) is two thousand times or more of its own thickness.

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