A steel strip camber defect correction device and correction method

Abstract

A device and method for correcting sickle bend defects of steel strips, wherein the device is provided with a set of steel strip tensioning mechanisms and two sets of steel strip correction mechanisms, and the steel strip passes through the steel strip tensioning mechanisms and each set of steel strip correction mechanisms in sequence; the steel strip correction mechanism is provided with an upper correction roller and a lower correction roller, and guide wheel assemblies are respectively arranged at the front, rear, left and right positions of the lower correction roller; the upper correction roller and the lower correction roller are conical rollers with parallel central axes, wherein the large diameter ends of the upper correction roller and the lower correction roller in one set of steel strip correction mechanisms are located at the rear of the steel strip correction mechanism, and a steel strip passing gap with a wide front and a narrow rear is formed between the upper correction roller and the lower correction roller, and the large diameter ends of the upper correction roller and the lower correction roller in another set of steel strip correction mechanisms are located at the front of the steel strip correction mechanism, and a steel strip passing gap with a narrow front and a wide rear is formed between the upper correction roller and the lower correction roller. The present invention improves the product quality and work efficiency of downstream production enterprises using steel strips as raw materials.

Description

Technical Field

[0001] The invention relates to the technical field of steel rolling, and in particular to a correction device and a correction method for a "sickle bend" defect of a steel strip. Background Art

[0002] Steel strips are widely used in industrial production, involving machinery manufacturing, engineering construction and other industries, especially in cold-bending products. During the steel rolling mill's sizing and coiling process, the steel strips will be deformed due to the uneven internal tension, resulting in the following Figure 1 The "sickle" phenomenon shown in the figure causes the downstream production enterprises that use steel strips as raw materials to have product edge tolerance problems during further processing and use of the steel strips due to the tolerance of the steel strip cross-section size, thus affecting the product quality of the downstream enterprises. In order to solve the problem of "sickle" of steel strips, downstream production enterprises that use steel strips as raw materials need to correct the shape of the steel strips. Therefore, it is necessary to optimize and design a steel strip correction device and a matching correction method to improve the product quality and work efficiency of downstream enterprises. Summary of the invention

[0003] The present invention provides a device and method for correcting the sickle bend defect of a steel strip, which aims to solve the problem of product edge line tolerance caused by excessive tolerance of the steel strip cross-section size tolerance by adjusting the "sickle bend" defect of the steel strip raw material, so as to improve the product quality and work efficiency of downstream production enterprises using the steel strip as raw material.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] A steel belt sickle defect correction device comprises a base, a steel belt tensioning mechanism and a steel belt correction mechanism; the base is fixed on a horizontal ground, and a group of steel belt tensioning mechanisms and two groups of steel belt correction mechanisms are assembled on the base, and the steel belt passes through the steel belt tensioning mechanism and each group of steel belt correction mechanisms in sequence under the pulling force of a traction device; the steel belt tensioning mechanism is provided with a pressing roller and a tensioning roller, and the pressing roller is arranged on the left and right sides of the tensioning roller and is located below the tensioning roller; the steel belt correction mechanism is provided with an upper correction roller and a lower correction roller arranged relatively , and guide wheel assemblies are respectively arranged at the front, rear, left and right positions of the lower correction roller; the upper correction roller and the lower correction roller are both conical rollers, and the central axes of the two are parallel. In one group of steel belt correction mechanisms, the large diameter ends of the upper correction roller and the lower correction roller are located at the rear of the steel belt correction mechanism, and a steel belt passing gap that is wide in front and narrow in the back is formed between the upper correction roller and the lower correction roller; in another group of steel belt correction mechanisms, the large diameter ends of the upper correction roller and the lower correction roller are located at the front of the steel belt correction mechanism, and a steel belt passing gap that is narrow in front and wide in the back is formed between the upper correction roller and the lower correction roller.

[0006] The above-mentioned steel belt sickle bend defect correction device, the guide wheel assembly includes a guide wheel body, a guide wheel shaft and a guide wheel seat assembly; the guide wheel body is assembled with the guide wheel shaft, the guide wheel body can rotate around the guide wheel shaft, and axial locking and positioning are achieved by a locking nut, and a steel belt guide groove is provided on the side wall of the guide wheel body; the lower end of the guide wheel shaft is clamped and fixed on the guide wheel seat assembly by a cylindrical plug.

[0007] In the above-mentioned steel strip sickle defect correction device, the steel strip guide groove is a trapezoidal cross-section groove or a rectangular cross-section groove.

[0008] The above-mentioned steel strip sickle bend defect correction device, the guide wheel seat assembly is provided with a pressure block, a parallel sliding block, a support plate and a guide wheel front and rear position adjustment unit; the guide wheel front and rear position adjustment unit includes a lead screw and a nut fixing block installed on the support plate, the nut fixing block is provided with a threaded hole matching the lead screw, the lead screw and the nut fixing block cooperate to form a transmission pair, one end of the lead screw is connected to the power source, and the other end is fixedly assembled with the parallel sliding block; the parallel sliding block is placed on the support plate, and the guide wheel shaft is fixed on the parallel sliding block; the pressure block is composed of left and right parts, which are installed on the support plate, and a parallel sliding block guide channel is formed between the left and right parts of the pressure block.

[0009] The above-mentioned steel belt sickle bend defect correction device, the steel belt tensioning mechanism is also provided with a tensioning roller upper and lower position adjustment unit, the tensioning roller upper and lower position adjustment unit includes two groups of first door-type frames arranged front and back, a first screw nut transmission assembly installed on the first door-type frame crossbeam and a first lifting slider equipped with the first door-type frame; a first slide rail matching with the first lifting slider is provided on the left and right columns of the first door-type frame; the first lifting slider is fixedly assembled with the front and rear ends of the tensioning roller, the top of the first lifting slider is fixedly assembled with the lower end of the screw in the first screw nut transmission assembly, and the upper end of the screw in the first screw nut transmission assembly is connected to a power source.

[0010] The above-mentioned steel strip sickle bend defect correction device, the steel strip correction mechanism is also provided with an upper correction roller up and down position adjustment unit, the upper correction roller up and down position adjustment unit includes two groups of second door-type frames arranged front and back, a second screw nut transmission assembly installed on the second door-type frame crossbeam and a second lifting slider equipped with the second door-type frame; second slide rails cooperating with the second lifting slider are provided on the left and right columns of the second door-type frame; the second lifting slider is fixedly assembled with the front and rear ends of the upper correction roller, the top of the second lifting slider is fixedly assembled with the lower end of the screw in the second screw nut transmission assembly, and the upper end of the screw in the second screw nut transmission assembly is connected to a power source.

[0011] A method for correcting the camber defect of a steel strip is provided. The camber defect of a steel strip is corrected by using the above-mentioned device for correcting the camber defect of a steel strip. The specific operation steps are as follows:

[0012] a. Through the first screw nut transmission assembly in the steel belt tensioning mechanism, the first lifting slide block in the tensioning roller upper and lower position adjustment unit is lowered to the limit position, and one end of the steel belt passes under the left pressure roller in the steel belt tensioning mechanism, then passes around the tensioning roller from above, and then passes under the right pressure roller in the steel belt tensioning mechanism, and then passes through the gap between the upper correction roller and the lower correction roller in the two sets of steel belt correction mechanisms in turn, and is connected to the traction device;

[0013] b. Adjust the two sets of first screw nut transmission components arranged front and back in the steel belt tensioning mechanism, and drive the tensioning roller to rise to a proper position through the first lifting slider, so that the steel belt is evenly subjected to the tensioning force;

[0014] c. According to the bending direction of the steel strip sickle, adjust the position of the upper correction roller in one set of steel strip correction mechanisms so that the steel strip between the upper correction roller and the lower correction roller passes through the gap to meet the process requirements;

[0015] d. Adjust the front and rear positions of the four groups of guide wheel assemblies (front, rear, left and right) in each group of steel belt correction mechanism so that the front and rear edges of the steel belt are embedded in the steel belt guide grooves of the guide wheel body;

[0016] e. Start the traction device. Under the pulling force of the traction device, the steel belt passes through the gap between the upper correction roller and the lower correction roller in the two sets of steel belt correction mechanisms, and the steel belt is rolled by the adjusted set of upper correction rollers and lower correction rollers. At the same time, the steel belt guide grooves in the four sets of guide wheel assemblies arranged in front, behind, left and right of the lower correction roller correct and adjust the edge of the steel belt, thereby realizing the correction operation of the "sickle bend" defect of the steel belt.

[0017] In the above-mentioned method for correcting the sickle bend defect of the steel strip, in the step c, when the bending direction of the sickle bend of the steel strip is forward bending, the position of the upper correction roller in a group of steel strip correction mechanisms forming a narrow front and wide rear steel strip passing gap between the upper correction roller and the lower correction roller is adjusted so that the steel strip passing gap between the upper correction roller and the lower correction roller meets the process requirements, and the sickle bend defect of the steel strip is corrected by the cooperation of the upper correction roller and the lower correction roller in the steel strip correction mechanism, while the upper correction roller and the lower correction roller in the other group of steel strip correction mechanisms are in a non-working state.

[0018] In the above-mentioned method for correcting the sickle bend defect of the steel strip, in the step c, when the bending direction of the sickle bend of the steel strip is backward, the position of the upper correction roller in a group of steel strip correction mechanisms forming a steel strip passing gap between the upper correction roller and the lower correction roller is adjusted so that the steel strip passing gap between the upper correction roller and the lower correction roller meets the process requirements, and the sickle bend defect of the steel strip is corrected by the cooperation of the upper correction roller and the lower correction roller in the steel strip correction mechanism, while the upper correction roller and the lower correction roller in the other group of steel strip correction mechanisms are in a non-working state.

[0019] In the above-mentioned method for correcting the sickle bend defect of a steel belt, in the step d, the front and rear positions of the four groups of guide wheel assemblies (front, rear, left and right) in the steel belt correction mechanism are adjusted according to the width of the steel belt, so that the central axis of the steel belt coincides with the central axis of the steel belt tensioning mechanism and the steel belt correction mechanism.

[0020] The present invention provides a device for correcting the sickle bend defect of a steel strip, which is provided with a steel strip tensioning mechanism and two groups of steel strip correction mechanisms, wherein the cone angles of the conical rollers in the two groups of steel strip correction mechanisms are in opposite directions, and two types of steel strip passing gaps, wide at the front and narrow at the back, and narrow at the front and wide at the back, are formed in the two groups of steel strip correction mechanisms. Therefore, the device can be respectively suitable for correction operations on steel strips with different sickle bend directions, thereby improving the universal performance of the device for correcting the sickle bend defect of the steel strip. The present invention also provides a method for correcting the sickle bend defect of a steel strip, which first tensions the steel strip to be corrected through a steel strip tensioning mechanism to make it in a tension balance state, and adjusts the position of the upper correction roller in one group of steel strip correction mechanisms according to the bending direction of the sickle bend of the steel strip, so that the steel strip between the upper correction roller and the lower correction roller in the steel strip correction mechanism passes through the gap to meet the process requirements, and when the steel strip passes through the steel strip correction mechanism under the pulling force of the traction device, the upper correction roller and the lower correction roller cooperate to roll the steel strip, and at the same time, four groups of guide wheel assemblies arranged in front, behind, left and right positions of the lower correction roller correct and adjust the edge of the steel strip. In summary, the present invention realizes the correction of the "sickle bend" defect of the steel strip, solves the problem of product edge line tolerance caused by excessive tolerance of the steel strip section size tolerance, and achieves the purpose of improving the product quality and work efficiency of downstream production enterprises using steel strip as raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the "sickle bend" of the steel strip;

[0022] Figure 2 It is a structural schematic diagram of the steel strip sickle defect correction device of the present invention;

[0023] Figure 3 yes Figure 2 The main cross-sectional view of

[0024] Figure 4 It is a schematic diagram of the steel belt tensioning mechanism;

[0025] Figure 5 It is a schematic diagram of the steel belt correction mechanism;

[0026] Figure 6 It is the front view of the steel belt correction mechanism;

[0027] Figure 7 yes Figure 6 The enlarged view of the structure at position Ⅰ in the middle;

[0028] Figure 8 It is a schematic diagram of the structure of the guide wheel assembly in the steel belt correction mechanism;

[0029] Fig. 9 yes Figure 8 The main cross-sectional view of

[0030] Fig.10 yes Fig. 9 Schematic diagram of the AA section structure.

[0031] Explanation of the symbols in the figure:

[0032] 1 is a steel belt, 1-1 is a sickle bend;

[0033] 2 is a steel belt tensioning mechanism, 2-1 is a first door-type frame, 2-2 is a tensioning roller, 2-3 is a pressing roller, 2-4 is a first screw nut transmission assembly, 2-5 is a first lifting slider, and 2-6 is a first slide rail;

[0034] 3 is a steel belt correction mechanism, 3-1 is a second door-type frame, 3-2 is an upper correction roller, 3-3 is a lower correction roller, 3-4 is a guide wheel assembly, 3-4-1 is a guide wheel body, 3-4-2 is a guide wheel shaft, 3-4-3 is a parallel sliding block, 3-4-4 is a lead screw, 3-4-5 is a nut fixing block, 3-4-6 is a pressure block, 3-4-7 is a support plate, 3-4-8 is a steel belt guide groove, 3-4-9 is a locking nut, 3-4-10 is a cylindrical plug, 3-5 is a second lead screw nut transmission assembly, 3-6 is a second slide rail, and 3-7 is a second lifting slide block;

[0035] 4 is a base. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] Refer to Figure 1. During the process of cutting and coiling the steel strip 1 to a certain size in the rolling mill, the steel strip 1 will be deformed due to the uneven internal tension, resulting in the sickle bend 1-1 shown in the figure. As a result, the downstream production enterprises using the steel strip 1 as raw material will suffer from the problem of product edge line tolerance due to the excessive tolerance of the steel strip cross-section dimension during the processing and use of the steel strip 1, thus affecting the product quality of the downstream enterprises. By analyzing the structure of the sickle bend 1-1 on the steel strip 1, the following conclusions can be drawn: When the sickle bend 1-1 is bent backward (as shown in the attached figure), the steel strip 1-1 is deformed due to the uneven internal tension, resulting in the appearance of the sickle bend 1-1. Figure 1 As shown in the figure, the cross section of the steel strip 1 is narrow at the front and wide at the back. When the sickle bend 1-1 is bent forward, the cross section of the steel strip 1 is wide at the front and narrow at the back.

[0038] See also Figure 2 , Figure 3In order to solve the problem of "sickle bend" of steel strip, the present invention provides a device for correcting the sickle bend defect of steel strip, the steel strip correction device comprising a base 4, a steel strip tensioning mechanism 2 and a steel strip correction mechanism 3; the base 4 is fixed on a horizontal ground, and a group of steel strip tensioning mechanisms 2 and two groups of steel strip correction mechanisms 3 are assembled on the base 4. Under the pulling force of the traction device, the steel strip 1 passes through the steel strip tensioning mechanism 2 and each group of steel strip correction mechanisms 3 in sequence, and the sickle bend 1-1 defect of the steel strip 1 can be adjusted under the cooperation of the steel strip tensioning mechanism 2 and the steel strip correction mechanism 3.

[0039] See also Figure 2 , Figure 3 , Figure 4 The steel belt sickle bend correction device described in the present invention is provided with a pressure roller 2-3, a tensioning roller 2-2 and a tensioning roller up and down position adjustment unit in its steel belt tensioning mechanism 2; the pressure roller 2-3 is arranged on the left and right sides of the tensioning roller 2-2, and is located below the tensioning roller 2-3; the tensioning roller up and down position adjustment unit includes two groups of first door-type frames 2-1 arranged front and back, a first screw nut transmission assembly 2-4 installed on the first door-type frame crossbeam and a first lifting slide block 2-5 equipped with the first door-type frame; first slide rails 2-6 cooperating with the first lifting slide block 2-5 are provided on the left and right columns of the first door-type frame 2-1; the first lifting slide block 2-5 is fixedly assembled with the front and rear ends of the tensioning roller 2-2, the top of the first lifting slide block 2-5 is fixedly assembled with the lower end of the screw in the first screw nut transmission assembly 2-4, and the upper end of the screw in the first screw nut transmission assembly 2-4 is the power source connection end.

[0040] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 The steel strip correction device described in the present invention is provided with an upper correction roller 3-2, a lower correction roller 3-3 and an upper correction roller upper and lower position adjustment unit arranged relatively in each group of steel strip correction mechanisms 3, and a guide wheel assembly 3-4 is respectively provided at the front, rear, left and right positions of the lower correction roller 3-3; the upper correction roller 3-2 and the lower correction roller 3-3 are both conical rollers, and the roller taper α is preferably 1-3°, and the central axes of the upper correction roller 3-2 and the lower correction roller 3-3 are parallel, and the large diameter ends of the upper correction roller 3-2 and the lower correction roller 3-3 in one group of steel strip correction mechanisms 3 are located at the rear of the steel strip correction mechanism 3, and a steel strip passing gap with a wide front and a narrow rear is formed between the upper correction roller 3-2 and the lower correction roller 3-3, and the large diameter ends of the upper correction roller 3-2 and the lower correction roller 3-3 in another group of steel strip correction mechanisms 3 are located at the front of the steel strip correction mechanism 3, and a steel strip passing gap with a narrow front and a wide rear is formed between the upper correction roller 3-2 and the lower correction roller 3-3.

[0041] See also Figure 2 , Figure 3 , Figure 5 , Figure 8 , Fig. 9 , Fig.10 The steel belt correction device of the present invention, the guide wheel assembly 3-4 includes a guide wheel body 3-4-1, a guide wheel shaft 3-4-2 and a guide wheel seat assembly; the guide wheel body 3-4-1 is assembled with the guide wheel shaft 3-4-2, the guide wheel body 3-4-1 can rotate around the guide wheel shaft 3-4-2, and axial locking and positioning are achieved through a locking nut 3-4-9, and a steel belt guide groove 3-4-8 with a trapezoidal or rectangular cross-section structure is provided on the side wall of the guide wheel body 3-4-1; the lower end of the guide wheel shaft 3-4-2 is clamped and fixedly installed on the guide wheel seat assembly through a cylindrical plug 3-4-10; the guide wheel seat assembly is provided with a pressure block 3-4-6, a parallel sliding block 3-4-3, a support plate 3-4-7 and a guide wheel front and rear position adjustment block 3-4-8. The whole unit, the guide wheel front and rear position adjustment unit includes a lead screw 3-4-4 and a nut fixing block 3-4-5 installed on the support plate 3-4-7, a threaded hole matching the lead screw 3-4-4 is provided on the nut fixing block 3-4-5, the lead screw 3-4-4 and the nut fixing block 3-4-5 cooperate to form a transmission pair, one end of the lead screw 3-4-4 is connected to the power source, and the other end is fixedly assembled with the parallel sliding block 3-4-3, the parallel sliding block 3-4-3 is placed on the support plate 3-4-7, the guide wheel shaft 3-4-2 is fixed on the parallel sliding block 3-4-3, the pressure block 3-4-6 consists of two left and right parts, which are installed on the support plate 3-4-7, and a parallel sliding block guide channel is formed between the left and right parts of the pressure block 3-4-6.

[0042] In the preferred embodiment of the steel belt sickle bend defect correction device described in the present invention, the power source connection end of the first screw nut transmission assembly 2-4 in the steel belt tensioning mechanism 2, the second screw nut transmission assembly 3-5 in the steel belt correction mechanism 3 and the screw 3-4-4 in the guide wheel assembly 3-4 is preferably a square shaft structure, which can be connected to a manually operated wrench or a motor output shaft to realize manual operation or motor-driven screw rotation.

[0043] See also Figure 2 , Figure 3 The present invention also provides a steel strip sickle defect correction method, which uses the steel strip sickle defect correction device to correct the steel strip sickle defect. The specific operation steps are as follows:

[0044] a. Through the first screw nut transmission assembly 2-4 in the steel belt tensioning mechanism 2, the first lifting slider 2-5 in the tensioning roller upper and lower position adjustment unit is lowered to the limit position, and one end of the steel belt 1 passes under the left pressure roller in the steel belt tensioning mechanism 2, then passes around the tensioning roller 2-2 from above, and then passes under the right pressure roller in the steel belt tensioning mechanism 2, and then passes through the gap between the upper correction roller 3-2 and the lower correction roller 3-3 in the two sets of steel belt correction mechanisms 3, and is connected to the traction device;

[0045] b. Adjust the two sets of first screw nut transmission components 2-4 arranged front and back in the steel belt tensioning mechanism 2, and drive the tensioning roller 2-2 to rise to a proper position through the first lifting slider 2-5, so that the steel belt 1 is evenly subjected to the tensioning force;

[0046] c. According to the bending direction of the sickle bend 1-1 on the steel strip 1, adjust the position of the upper correction roller 3-2 in one of the sets of steel strip correction mechanisms. When the bending direction of the sickle bend 1-1 on the steel strip 1 is forward bending, the cross-section of the steel strip 1 is wide at the front and narrow at the back. At this time, adjust the position of the upper correction roller 3-2 in one of the sets of steel strip correction mechanisms that form a narrow at the front and wide at the back steel strip passing through a gap between the upper correction roller and the lower correction roller, so that the steel strip passing through the gap between the upper correction roller 3-2 and the lower correction roller 3-3 meets the process requirements. When the bending direction of the sickle bend 1-1 on the steel strip 1 is backward bending, the cross-section of the steel strip 1 is narrow at the front and wide at the back. Adjust the position of the upper correction roller 3-2 in one of the sets of steel strip correction mechanisms that form a wide at the front and narrow at the back steel strip passing through a gap between the upper correction roller and the lower correction roller, so that the steel strip passing through the gap between the upper correction roller 3-2 and the lower correction roller 3-3 meets the process requirements.

[0047] d. Adjust the front and rear positions of the guide wheel body 3-4-1 in the front, rear, left and right four guide wheel assemblies 3-4 in the steel belt correction mechanism 3 according to the width of the steel belt 1, so that the central axis of the steel belt 1 coincides with the central axis of the steel belt tensioning mechanism 2 and the steel belt correction mechanism 3, and the front and rear side edges of the steel belt 1 are embedded in the steel belt guide groove 3-4-8 of the guide wheel body 3-4-1;

[0048] e. Start the traction device. Under the pulling force of the traction device, the steel strip 1 passes through the gap between the upper correction roller 3-2 and the lower correction roller 3-3 in the two sets of steel strip correction mechanisms 3, and the adjusted set of upper correction rollers and lower correction rollers cooperate to roll the steel strip 1. Since the shape of the steel strip passing through the gap between the upper correction roller and the lower correction roller is opposite to the taper of the cross-sectional shape of the sickle bend 1-1 on the steel strip 1, the rolling action of the upper correction roller and the lower correction roller can make the molecules of the steel strip 1 move laterally, thereby changing the cross-sectional shape of the steel strip 1. At the same time, the edge of the steel strip 1 is corrected and adjusted by the steel strip guide grooves 3-4-8 in the four sets of guide wheel assemblies 3-4 arranged in front, rear, left and right positions of the lower correction roller, thereby realizing the correction operation of the "sickle bend" defect of the steel strip.

Claims

1. The device for correcting the camber defect of steel strip is characterized by: It comprises a base (4), a steel belt tensioning mechanism (2) and a steel belt correction mechanism (3); the base (4) is fixed on a horizontal ground, and a set of steel belt tensioning mechanisms (2) and two sets of steel belt correction mechanisms (3) are mounted on the base (4); under the pulling force of a traction device, the steel belt (1) passes through the steel belt tensioning mechanism (2) and each set of steel belt correction mechanisms (3) in sequence; the steel belt tensioning mechanism (2) is provided with a pressing roller (2-3) and a tensioning roller (2-2); the pressing roller (2-3) is arranged on the left and right sides of the tensioning roller (2-2) and is located below the tensioning roller (2-2); the steel belt correction mechanism (3) is provided with an upper correction roller (3-2) and a lower correction roller (3-3) which are arranged opposite to each other, and the lower correction roller (3-3) is provided with a pressing roller (2-3) and a tensioning roller (2-2) which are arranged on the left and right sides of the tensioning roller (2-2) and are located below the tensioning roller (2-2); A guide wheel assembly (3-4) is respectively arranged at the front, rear, left and right positions of (3-3); the upper correction roller (3-2) and the lower correction roller (3-3) are both conical rollers, and the central axes of the two are parallel. In one set of the steel belt correction mechanism (3), the large diameter ends of the upper correction roller (3-2) and the lower correction roller (3-3) are located at the rear of the steel belt correction mechanism (3), and a steel belt passing gap that is wide at the front and narrow at the rear is formed between the upper correction roller (3-2) and the lower correction roller (3-3); in another set of the steel belt correction mechanism (3), the large diameter ends of the upper correction roller (3-2) and the lower correction roller (3-3) are located at the front of the steel belt correction mechanism (3), and a steel belt passing gap that is narrow at the front and wide at the rear is formed between the upper correction roller (3-2) and the lower correction roller (3-3).

2. The device for correcting the camber defect of a steel strip according to claim 1 is characterized in that: The guide wheel assembly (3-4) comprises a guide wheel body (3-4-1), a guide wheel shaft (3-4-2) and a guide wheel seat assembly; the guide wheel body (3-4-1) is assembled with the guide wheel shaft (3-4-2); the guide wheel body (3-4-1) can rotate around the guide wheel shaft (3-4-2) and achieve axial locking and positioning through a locking nut (3-4-9); a steel belt guide groove (3-4-8) is provided on the side wall of the guide wheel body (3-4-1); the lower end of the guide wheel shaft (3-4-2) is clamped and fixedly mounted on the guide wheel seat assembly through a cylindrical plug (3-4-10).

3. The device for correcting the camber defect of a steel strip according to claim 2 is characterized in that: The steel belt guiding groove (3-4-8) is a groove with a trapezoidal cross section or a groove with a rectangular cross section.

4. The device for correcting the camber defect of a steel strip according to claim 3 is characterized in that: The guide wheel seat assembly is provided with a pressing block (3-4-6), a parallel sliding block (3-4-3), a support plate (3-4-7) and a guide wheel front and rear position adjustment unit; the guide wheel front and rear position adjustment unit comprises a lead screw (3-4-4) and a nut fixing block (3-4-5) mounted on the support plate (3-4-7); a threaded hole matching the lead screw (3-4-4) is provided on the nut fixing block (3-4-5); the lead screw (3-4-4) and the nut fixing block (3-4-5) match in a The lead screw (3-4-4) is connected to a power source at one end and fixedly assembled with a parallel sliding block (3-4-3) at the other end; the parallel sliding block (3-4-3) is placed on a support plate (3-4-7), and the guide wheel shaft (3-4-2) is fixed on the parallel sliding block (3-4-3); the pressing block (3-4-6) is composed of left and right parts, which are installed on the support plate (3-4-7), and a parallel sliding block guide channel is formed between the left and right parts of the pressing block (3-4-6).

5. The steel strip camber defect correction device according to any one of claims 1 to 4, characterized in that: The steel belt tensioning mechanism (2) is also provided with a tensioning roller up-and-down position adjustment unit, the tensioning roller up-and-down position adjustment unit comprising two groups of first door-type frames (2-1) arranged front and rear, a first lead screw nut transmission assembly (2-4) mounted on the first door-type frame crossbeam, and a first lifting slide block (2-5) matched with the first door-type frame; first slide rails (2-6) matched with the first lifting slide block (2-5) are provided on the left and right columns of the first door-type frame (2-1); the first lifting slide block (2-5) is fixedly assembled with the front and rear ends of the tensioning roller (2-2), the top of the first lifting slide block (2-5) is fixedly assembled with the lower end of the lead screw in the first lead screw nut transmission assembly (2-4), and the upper end of the lead screw in the first lead screw nut transmission assembly (2-4) is connected to a power source.

6. The device for correcting the camber defect of a steel strip according to claim 5 is characterized in that: The steel belt correction mechanism (3) is also provided with an upper correction roller up-down position adjustment unit, the upper correction roller up-down position adjustment unit comprising two sets of second door-type frames (3-1) arranged front and rear, a second lead screw nut transmission assembly (3-5) installed on the second door-type frame crossbeam and a second lifting slide block (3-7) matched with the second door-type frame; second slide rails (3-6) matched with the second lifting slide block (3-7) are provided on the left and right columns of the second door-type frame (3-1); the second lifting slide block (3-7) is fixedly assembled with the front and rear ends of the upper correction roller (3-2), the top of the second lifting slide block (3-7) is fixedly assembled with the lower end of the lead screw in the second lead screw nut transmission assembly (3-5), and the upper end of the lead screw in the second lead screw nut transmission assembly (3-5) is connected to a power source.

7. A method for correcting a steel strip camber defect, characterized in that: It uses the steel strip sickle defect correction device of any one of claims 5 to 6 to complete the correction of the steel strip sickle defect, and the specific operation steps are as follows: a. The first lifting slide block (2-5) in the tensioning roller upper and lower position adjustment unit is lowered to the limit position through the first screw nut transmission assembly (2-4) in the steel belt tensioning mechanism (2), and one end of the steel belt (1) is passed from below the left pressure roller in the steel belt tensioning mechanism (2), then passes around the tensioning roller (2-2) from above, and then passes from below the right pressure roller in the steel belt tensioning mechanism (2), and then passes through the gap between the upper correction roller (3-2) and the lower correction roller (3-3) in the two sets of steel belt correction mechanisms (3) to connect with the traction device; b. Adjusting the two sets of first screw nut transmission assemblies (2-4) arranged front and rear in the steel belt tensioning mechanism (2), and driving the tensioning roller (2-2) to rise to a proper position via the first lifting slider (2-5), so that the steel belt (1) is evenly subjected to the tensioning force; c. adjusting the position of the upper correction roller (3-2) in one set of the steel strip correction mechanisms according to the bending direction of the sickle bend (1-1) on the steel strip (1), so that the steel strip between the upper correction roller (3-2) and the lower correction roller (3-3) passes through the gap to meet the process requirements; d. Adjust the front and rear positions of the four groups of guide wheel assemblies (3-4) in each group of steel belt correction mechanisms, namely, front, rear, left and right, so that the front and rear edges of the steel belt (1) are embedded in the steel belt guide grooves (3-4-8) of the guide wheel body (3-4-1); e. The traction device is started, and the steel belt (1) passes through the gap between the upper correction roller (3-2) and the lower correction roller (3-3) in the two sets of steel belt correction mechanisms (3) under the pulling force of the traction device, and the steel belt (1) is rolled by the adjusted set of upper correction rollers and lower correction rollers. At the same time, the steel belt guide grooves (3-4-8) in the four sets of guide wheel assemblies (3-4) arranged in front, rear, left and right positions of the lower correction roller correct and adjust the edge of the steel belt (1), thereby achieving the correction operation of the "sickle bend" defect of the steel belt.

8. The method for correcting the camber defect of a steel strip according to claim 7 is characterized in that: In the step c, when the bending direction of the sickle bend (1-1) on the steel strip (1) is forward bending, the position of the upper correction roller (3-2) in a set of steel strip correction mechanisms forming a steel strip passing gap with a narrow front and a wide rear between the upper correction roller and the lower correction roller is adjusted so that the steel strip passing gap between the upper correction roller (3-2) and the lower correction roller (3-3) meets the process requirements, and the sickle bend defect of the steel strip (1) is corrected by the cooperation of the upper correction roller (3-2) and the lower correction roller (3-3) in the steel strip correction mechanism, while the upper correction roller and the lower correction roller in the other set of steel strip correction mechanisms are in a non-working state.

9. The method for correcting the camber defect of a steel strip according to claim 7, characterized in that: In the step c, when the bending direction of the sickle bend (1-1) on the steel strip (1) is backward bending, the position of the upper correction roller (3-2) in a set of steel strip correction mechanisms forming a steel strip passing gap with a wide front and a narrow rear side between the upper correction roller and the lower correction roller is adjusted so that the steel strip passing gap between the upper correction roller (3-2) and the lower correction roller (3-3) meets the process requirements, and the sickle bend defect of the steel strip (1) is corrected by the cooperation of the upper correction roller (3-2) and the lower correction roller (3-3) in the steel strip correction mechanism, while the upper correction roller and the lower correction roller in the other set of steel strip correction mechanisms are in a non-working state.

10. The method for correcting the camber defect of a steel strip according to claim 8 or 9, characterized in that: In the step d, the front and rear positions of the guide wheel bodies (3-4-1) in the four groups of guide wheel assemblies (3-4) in the front, rear, left and right of the steel belt correction mechanism (3) are adjusted according to the width of the steel belt (1), so that the central axis of the steel belt (1) coincides with the central axis of the steel belt tensioning mechanism (2) and the steel belt correction mechanism (3).

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