A cold-rolled steel coil straightening device

Abstract

This utility model discloses a cold-rolled steel coil correction device, including multiple idlers mounted on a support beam. Two sets of correction components are symmetrically arranged between two idlers mounted on the support beam. The edge of the strip steel supported and conveyed by the idlers passes through the correction components. Each set of correction components includes a support frame and correction rollers mounted vertically on the same side of the support frame. The support frame controls the axis of the correction rollers to form an acute angle with the strip steel conveying direction. The distance between the two correction rollers is adjustable. This utility model alternately arranges idlers and a pair of correction components. When the idlers support and convey the strip steel, the edge of the strip steel passes through the correction components. The correction components are inclined relative to the length direction of the strip steel. The correction components apply force to the strip steel, forcing the two sides of the strip steel to move closer or further apart, thus forcing the strip steel to be in a centered state and realizing real-time correction of the strip steel.

Description

Technical Field

[0001] This utility model relates to the field of strip steel correction technology, specifically a cold-rolled steel coil correction device. Background Technology

[0002] In the processing of cold-rolled steel coils, continuous conveying and precise positioning of the strip are core aspects of ensuring product quality, and the seismic correction device is the key equipment to achieve this goal. Currently, the mainstream steel coil seismic correction devices in the industry generally adopt a "post-correction" mode, that is, when a significant deviation of the strip is detected, it is then reset by means of mechanical adjustment or power drive.

[0003] This method can solve the strip misalignment problem to some extent, allowing the strip to eventually return to the preset path. However, its limitations are particularly pronounced for long steel coils commonly used in cold rolling. Due to the large length of the steel coil, there is an unavoidable time lag between the appearance of strip misalignment at the edge, the detection device capturing the misalignment signal, and the correction mechanism completing the adjustment. During this time, the strip has already traveled a certain distance in a misaligned state, causing the steel coil to be unable to maintain a stable centered position during transport.

[0004] Specifically, when the strip steel is not centered, it will have a series of adverse effects on subsequent processing stages. During the coiling stage, the offset strip steel will cause a decrease in the alignment accuracy between the layers of the coil, forming a "tower-shaped coil" or a "loose coil." This not only affects the appearance quality of the coil but also increases the difficulty of subsequent uncoiling and may even lead to strip steel deformation due to uneven interlayer stress. In other processing stages, such as shearing and galvanizing, the offset of the strip steel will cause deviations in the processing benchmark, resulting in insufficient shearing dimensional accuracy, uneven coating thickness, and other problems, seriously affecting product consistency and yield.

[0005] Furthermore, the adjustment range and response speed of existing correction devices are often difficult to match the conveying speed of long steel coils. When the strip deviates significantly, a single correction action may not be able to completely eliminate the deviation, requiring multiple adjustments to bring the strip back into position, which further exacerbates the positional fluctuations of the strip during conveying. Utility Model Content

[0006] The purpose of this invention is to provide a cold-rolled steel coil straightening device, which aims to improve the problem that the device used for steel coil straightening cannot always keep the strip in a centered state.

[0007] This utility model is implemented as follows: A cold-rolled steel coil correction device includes multiple idlers mounted on a support beam. Two sets of correction components mounted on the support beam are symmetrically arranged between two idlers. The edge of the idler supporting and conveying the strip steel passes through the correction components. Each set of correction components includes a support frame and correction rollers mounted vertically on the same side of the support frame. The support frame controls the axis of the correction rollers to form an acute angle with the direction of strip steel conveying. The distance between the two correction rollers is adjustable, and the two correction rollers are located on the upper and lower sides of the strip steel, respectively, while the correction rollers are in contact with the strip steel line.

[0008] Preferably, the correction roller includes a frustum roller and an end plate disposed at the larger end of the frustum roller. Slots and insert rods are respectively provided on the side walls of the frustum roller and the end plate that are close to each other. The insert rod is inserted into the slot, and the end of the fastening bolt installed at the countersunk hole of the frustum roller is threaded into the end plate.

[0009] Preferably, the support frame includes a frame body, a lifting plate slidably sleeved on the frame body, and a bottom cylinder sleeved at the bottom of the frame body; the bottom cylinder is installed on the support beam, and a brake ring is provided for lifting between the bottom cylinder and the frame body; bearing seats are provided at the bottom of the frame body and on the side of the lifting plate, and the end shaft of the correction roller passes through the bearing seat.

[0010] Preferably, the frame includes a base plate and two vertical rods installed above the base plate, with locking nuts distributed vertically at the threaded structure at the top of the vertical rods; both ends of the lifting plate are provided with through holes, the vertical rods pass through the through holes, and the two locking nuts are located on the upper and lower sides of the lifting plate.

[0011] Preferably, a second support plate and a first support plate are respectively provided on the side of the lifting plate and the bottom plate, and bearing seats are respectively installed at an angle on the side of the second support plate and the first support plate that are close to each other, and the generatrices of the two straightening rollers that are close to each other are set parallel to the strip steel.

[0012] Preferably, a bottom shaft is vertically installed below the base plate, the bottom of the bottom shaft is provided with an annular groove, and the bottom of the bottom shaft is inserted into the bottom cylinder; multiple threaded connecting holes are provided on the side wall of the bottom cylinder, and the end of the connecting stud installed at the threaded connecting hole extends into the annular groove.

[0013] Preferably, multiple second brake grooves with open tops are evenly distributed along the circumference of the top of the bottom cylinder, and first brake grooves are evenly distributed along the circumference of the bottom shaft. The number of first brake grooves and second brake grooves is equal. The interior of the brake ring is configured as a stepped structure with a larger bottom and a smaller top, and two rings of brake posts are distributed vertically on the inner side of the brake ring. The two rings of brake posts are respectively installed in the first brake groove and the second brake groove.

[0014] Preferably, a spring in a compressed state is sleeved on the bottom shaft, with both ends of the spring contacting the bottom plate and the brake ring respectively; a limit bolt is provided through the side of the bottom plate, and the bottom of the limit bolt can be threaded into the threaded hole of the brake ring.

[0015] Preferably, a fixing plate is provided at the top of the bottom cylinder, and a clamping plate is fitted on the bottom cylinder. The fixing plate and the clamping plate are distributed on the upper and lower sides of the support beam, and the studs installed under the fixing plate penetrate the support beam and the clamping plate.

[0016] Preferably, it also includes an adjusting rod assembly, which includes an internally threaded tube, two threaded posts that are threaded into both ends of the internally threaded tube, and two sets of connecting hoops that are respectively installed on the two threaded posts at opposite ends. The connecting hoops include a fixed arc plate and a clamping arc plate that are detachably connected. The side walls of the fixed arc plate and the clamping arc plate that are close to each other are both set as curved surfaces. The end ball installed at the end of the straightening roller shaft is located in the space formed by the fixed arc plate and the clamping arc plate.

[0017] The beneficial effects of this utility model are:

[0018] 1. This utility model alternately sets up idlers and a pair of correction components. When the idlers support and transport the strip steel, the edge of the strip steel passes through the correction components. The correction components are set at an angle relative to the length direction of the strip steel. The correction components can apply force to the strip steel to force the two sides of the strip steel to move closer or further apart, thus forcing the strip steel to be in a centered state and realizing the correction of the strip steel in real time.

[0019] 2. The present invention provides a correction roller comprising a detachably connected frustum roller and an end plate, with the end plate mounted on a support frame. The frustum roller can be disassembled and replaced after the rubber layer on the surface of the frustum roller is damaged, so that there is greater resistance between the frustum roller and the strip through the rubber layer, providing support for controlling the centering of the strip.

[0020] 3. The frame and the bottom cylinder of this utility model are movably connected, and a brake ring is installed between the bottom of the frame and the bottom cylinder. When it is necessary to adjust the angle between the straightening roller and the strip, the brake ring can be raised to release the restriction of the frame and the bottom cylinder. Then, the frame can be rotated to adjust the orientation of the straightening roller so that the straightening roller can apply a force in the tilting direction to the strip and control the strip to be in a centered state. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model, making other features, objects, and characteristics of the utility model more apparent. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model and the steel coil;

[0023] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the correction component of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the correction roller of this utility model;

[0026] Figure 5 This is a first structural schematic diagram of the adjusting rod assembly of this utility model;

[0027] Figure 6 This is a schematic diagram of the second structure of the adjusting rod assembly of this utility model;

[0028] Figure 7 This is a structural schematic diagram of the support frame of this utility model;

[0029] Figure 8 This is a schematic diagram of the structure of the lifting plate of this utility model;

[0030] Figure 9 This is a schematic diagram of the structure of the frame of this utility model;

[0031] Figure 10 This is a schematic diagram of the structure of the brake ring of this utility model;

[0032] Figure 11 This is a schematic diagram of the structure of the bottom cylinder of this utility model.

[0033] In the diagram: 1. Idler roller; 11. Support beam; 2. Correction assembly; 3. Correction roller; 31. Conical roller; 32. End plate; 33. End ball; 34. Slot; 35. Fastening bolt; 36. Insert rod; 4. Support frame; 41. Frame body; 411. Vertical rod; 412. Locking nut; 413. Base plate; 414. Limiting bolt; 415. First brake groove; 416. Annular groove; 417. First support plate; 418. Bottom shaft; 419. Lifting plate; 42. Through hole; 421. Second support plate; 422. Bottom cylinder; 43. Threaded connecting hole; 431. Connecting stud; 432. Second brake groove; 433. Clamping plate; 434. Fixing plate; 435. Brake ring; 444. Brake column; 441. Threaded hole; 442. Adjusting rod assembly; 5. Internal threaded tube; 51. Polygonal boss; 52. Threaded column; 53. Connecting hoop; 54. Fixing arc plate; 541. Clamping arc plate; 542. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0036] Example 1

[0037] In order to keep the strip in the center position at all times during the conveying process and change the way existing correction devices are adjusted afterward, this embodiment provides a correction device for steel coil processing.

[0038] like Figure 1 , Figure 2 As shown, the correction device includes multiple parallel idler rollers 1 and multiple sets of correction components 2. The idler rollers 1 are connected to two parallel support beams 11 via bearing seats. These support beams 11 are installed on existing equipment or equipped with corresponding frames to stably support the idler rollers 1 in the workplace, thereby enabling the conveying of the strip steel. The multiple sets of correction components 2 are arranged in pairs, with each pair of components 2 staggered with the idler rollers 1. That is, a pair of correction components 2 is placed between two adjacent idler rollers 1. This allows the edges of the strip steel to pass through the correction components 2 while the idler rollers 1 are supporting the strip steel. The pull of the correction components 2 on both sides of the strip steel forces the edges of the strip steel to move closer or further apart, thus centering the strip steel and achieving real-time correction of its deviation.

[0039] like Figure 3 As shown, specifically, each set of correction components 2 includes a support frame 4 and correction rollers 3 installed vertically on the same side of the support frame 4. The bottom of the support frame 4 is installed at the support beam 11, and the support frame 4 is adjustable. By adjusting the state of the support frame 4, the axis of the correction rollers 3 can be controlled to form an acute angle with the strip conveying direction. This allows the correction components 2 to apply an inclined force to the strip, forcing the two sides of the strip to move closer or further apart. Furthermore, the distance between the two correction rollers 3 can be adjusted by the support frame 4. The two correction rollers 3 are located on the upper and lower sides of the strip, respectively, and are in contact with the strip line. This restricts the position of the strip under the action of the two correction rollers 3 and facilitates the application of force to the strip.

[0040] like Figure 4 As shown, the straightening roller 3 includes a frustum roller 31 and an end plate 32 located at the larger end of the frustum roller 31. Slots 34 and insert rods 36 are respectively provided on the sidewalls of the frustum roller 31 and the end plate 32, which are close to each other. The insert rod 36 is inserted into the slot 34, and the end of the fastening bolt 35, installed at the countersunk hole of the frustum roller 31, is threaded into the end plate 32. This arrangement allows for a detachable connection between the frustum roller 31 and the end plate 32. The end plate 32 is connected to the support frame 4, thus ensuring stable installation of the frustum roller 31. To facilitate the application of force by the frustum roller 31 to the strip, a rubber layer is provided on the outer side wall of the frustum roller 31. However, the rubber layer is prone to wear after prolonged use. Therefore, the detachable installation of the end plate 32 and the frustum roller 31 facilitates replacement of the frustum roller 31 as needed.

[0041] The two ends of the frustum roll 31 have different diameters. According to the relationship between angular velocity and linear velocity, when the angular velocity is constant, the linear velocity at the larger end is greater and the linear velocity at the smaller end is smaller. When the strip steel contacts the smaller end of the frustum roll 31, the difference in linear velocity will generate resistance, causing the strip steel to return to its original position.

[0042] like Figure 7 As shown, to ensure stable installation of the two straightening rollers 3, the support frame 4 includes a frame body 41, a lifting plate 42 slidably sleeved on the frame body 41, and a bottom cylinder 43 sleeved at the bottom of the frame body 41. The bottom cylinder 43 is mounted on the support beam 11, and a brake ring 44 is provided between the bottom cylinder 43 and the frame body 41. This brake ring 44 controls the stable installation of the frame body 41 relative to the bottom cylinder 43 and provides convenience for adjusting the orientation of the straightening rollers 3 by controlling the rotation of the frame body 41 relative to the bottom cylinder 43 as needed. Bearing seats are provided at the bottom of the frame body 41 and on the side of the lifting plate 42, and the bearing seats are inclined. Therefore, when the end shaft of the straightening roller 3 passes through the bearing seat, the generatrices of the two straightening rollers 3 that are close to each other are in a horizontal state, thereby achieving line contact between the straightening rollers 3 and the strip steel.

[0043] like Figure 8 , Figure 9 As shown, to achieve stable installation of the lifting plate 42, the frame 41 includes a base plate 413 and two vertical rods 411 installed vertically above the base plate 413. Locking nuts 412 are fitted vertically and horizontally at the threaded structure at the top of the vertical rods 411. Both ends of the lifting plate 42 have through holes 421, through which the vertical rods 411 pass. The two locking nuts 412 are located on the upper and lower sides of the lifting plate 42. When it is necessary to adjust the height of the lifting plate 42 so that the upper straightening roller 3 contacts the strip, the position of the lifting plate 42 can be adjusted by manually rotating the upper and lower locking nuts 412.

[0044] like Figure 8 , Figure 9As shown, in order to ensure that the bearing housing is stably installed on the lifting plate 42 and the base plate 413, a second support plate 422 and a first support plate 418 are respectively provided on the side of the lifting plate 42 and the base plate 413. The bearing housing is installed at an angle on the side of the second support plate 422 and the first support plate 418 that are close to each other. The generatrices of the two straightening rollers 3 that are close to each other are set parallel to the strip steel.

[0045] like Figure 9 , Figure 11 As shown, to achieve the movable connection between the frame 41 and the base cylinder 43, a bottom shaft 419 is vertically installed below the base plate 413. The bottom of the bottom shaft 419 has an annular groove 416. Multiple threaded holes 431 are provided on the side wall of the base cylinder 43, and a connecting stud 432 is installed at each threaded hole 431. The bottom of the bottom shaft 419 is inserted into the base cylinder 43, and the end of the connecting stud 432 extends into the annular groove 416. Therefore, the connecting stud 432 restricts the bottom shaft 419 to be stably installed within the base cylinder 43, and the end of the connecting stud 432 presses against the bottom shaft 419. When it is necessary to control the rotation of the frame 41 relative to the base cylinder 43, rotating the connecting stud 432 releases the restriction of the bottom shaft 419. After adjusting the orientation of the frame 41, rotating the connecting stud 432 in the opposite direction controls the stable installation of the frame 41 relative to the base cylinder 43.

[0046] like Figure 9 , Figure 10 , Figure 11 As shown, to ensure a more stable connection between the frame 41 and the base cylinder 43, multiple second brake grooves 433 with open tops are evenly distributed along the circumference of the top of the base cylinder 43, and first brake grooves 415 are evenly distributed along the circumference of the bottom shaft 419. The number of first brake grooves 415 and second brake grooves 433 are equal. The brake ring 44 has an internal stepped structure that is larger at the bottom and smaller at the top, and two rings of brake posts 441 are distributed vertically on the inner side of the brake ring 44. The two rings of brake posts 441 are respectively installed in the first brake groove 415 and the second brake groove 433. After adjusting the orientation of the frame 41, the bottom of the brake ring 44 is fitted onto the base cylinder 43, and the brake posts 441 are installed in the first brake groove 415 and the second brake groove 433, thus achieving braking of the frame 41. When it is necessary to adjust the orientation of the frame 41, lift the brake ring 44 to disengage it from the bottom cylinder 43, and insert the bottom thread of the limiting bolt 414 that passes through the bottom plate 413 into the threaded hole 442 of the brake ring 44 to control the brake ring 44 to remain stationary at a certain height. Then, rotate the frame 41 to adjust its orientation.

[0047] To fit the brake ring 44 onto the bottom shaft 419, the bottom shaft 419 can be configured as a stepped structure with a thicker top and a thinner bottom. In this case, the thinner part of the bottom shaft 419 is inserted into the bottom cylinder 43, and the first brake groove 415 is located at the thicker part. Alternatively, the bottom shaft 419 can be configured as a straight rod structure, in which case the height of the first brake groove 415 must be equal to the height of the bottom shaft 419.

[0048] like Figure 9 As shown, in order to control the brake ring 44 to be stably sleeved on the bottom cylinder 43, a spring 417 in a compressed state is sleeved on the bottom shaft 419, and the two ends of the spring 417 are in contact with the bottom plate 413 and the brake ring 44 respectively.

[0049] The bottom cylinder 43 is stably connected to the support beam 11, for example, by welding the bottom cylinder 43 to the support beam 11, or by detachably connecting the bottom cylinder 43 to the support beam 11. In short, the alignment component 2 must be stably installed.

[0050] like Figure 11 As shown, when the bottom cylinder 43 is detachably connected to the support beam 11, a fixing plate 435 is provided on the top of the bottom cylinder 43, and a clamping plate 434 is sleeved on the bottom cylinder 43. The fixing plate 435 and the clamping plate 434 are distributed on the upper and lower sides of the support beam 11, and the stud installed below the fixing plate 435 passes through the support beam 11 and the clamping plate 434.

[0051] Example 2

[0052] like Figure 5 , Figure 6 As shown, based on Embodiment 1, in order to control the two straightening rollers 3 to be installed relatively stably and with sufficient strength, an adjusting rod group 5 is provided at the ends of the two straightening rollers 3. The adjusting rod group 5 includes an internally threaded tube 51, two threaded posts 53 that are respectively threaded into both ends of the internally threaded tube 51, and two sets of connecting clamps 54 respectively installed at the ends of the two threaded posts 53 that are far apart from each other. The connecting clamp 54 includes a fixed arc plate 541 and a clamping arc plate 542 that are detachably connected. The side walls of the fixed arc plate 541 and the clamping arc plate 542 that are close to each other are both set as curved surfaces. The end ball 33 installed at the end of the shaft of the straightening roller 3 is located in the space formed by the fixed arc plate 541 and the clamping arc plate 542, so as to realize the movable connection between the end ball 33 and the connecting clamp 54, and enhance the strength of the two straightening rollers 3 to be placed relatively stably with the cooperation of the internally threaded tube 51 and the threaded post 53. To accommodate the adjustment of the spacing between the straightening rollers 3, the fixed arc plate 541 and the clamping arc plate 542 are designed to be detachable, allowing the restriction of the end ball 33 and the connecting clamp 54 to be removed before adjusting the spacing of the straightening rollers 3. A polygonal boss 52 is fixedly provided in the middle of the internally threaded tube 51.

[0053] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0054] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A cold-rolled steel coil straightening device, characterized in that, It includes multiple idlers (1) set on a support beam (11), and two sets of correction components (2) symmetrically arranged between two idlers (1) on the support beam (11). The edge of the idler (1) supporting and conveying the strip passes through the correction component (2). Each set of correction components (2) includes a support frame (4) and correction rollers (3) arranged vertically on the same side of the support frame (4). The support frame (4) controls the axis of the correction roller (3) to form an acute angle with the strip conveying direction. The distance between the two correction rollers (3) is adjustable, and the two correction rollers (3) are located on the upper and lower sides of the strip respectively. At the same time, the correction rollers (3) are in contact with the strip line.

2. The cold-rolled steel coil straightening device according to claim 1, characterized in that, The correction roller (3) includes a frustum roller (31) and an end plate (32) disposed at the larger end of the frustum roller (31). Slots (34) and insert rods (36) are respectively provided on the side walls of the frustum roller (31) and the end plate (32) that are close to each other. The insert rod (36) is inserted into the slot (34), and the end of the fastening bolt (35) installed at the countersunk hole of the frustum roller (31) is threaded into the end plate (32).

3. The cold-rolled steel coil straightening device according to claim 1, characterized in that, The support frame (4) includes a frame body (41), a lifting plate (42) slidably sleeved on the frame body (41), and a bottom cylinder (43) sleeved on the bottom of the frame body (41); the bottom cylinder (43) is installed on the support beam (11), and a brake ring (44) is provided between the bottom cylinder (43) and the frame body (41); bearing seats are provided at the bottom of the frame body (41) and on the side of the lifting plate (42), and the end shaft of the correction roller (3) passes through the bearing seat.

4. The cold-rolled steel coil straightening device according to claim 3, characterized in that, The frame (41) includes a base plate (413) and two vertical rods (411) installed vertically above the base plate (413). Locking nuts (412) are provided on the threaded structure at the top of the vertical rods (411) and distributed on the upper and lower sides. Both ends of the lifting plate (42) are provided with through holes (421), and the vertical rods (411) are provided through the through holes (421). The two locking nuts (412) are located on the upper and lower sides of the lifting plate (42).

5. A cold-rolled steel coil straightening device according to claim 4, characterized in that, A second support plate (422) and a first support plate (418) are respectively provided on the sides of the lifting plate (42) and the base plate (413), and bearing seats are respectively installed at an inclination on the side of the second support plate (422) and the first support plate (418) that are close to each other. The generatrices of the two straightening rollers (3) that are close to each other are set parallel to the strip steel.

6. A cold-rolled steel coil straightening device according to claim 4, characterized in that, A bottom shaft (419) is vertically installed below the base plate (413). The bottom of the bottom shaft (419) is provided with an annular groove (416), and the bottom of the bottom shaft (419) is inserted into the bottom cylinder (43). Multiple threaded connecting holes (431) are provided on the side wall of the bottom cylinder (43), and the end of the connecting stud (432) installed at the threaded connecting hole (431) extends into the annular groove (416).

7. A cold-rolled steel coil straightening device according to claim 6, characterized in that, Multiple second brake grooves (433) with open tops are evenly distributed along the circumference of the top of the bottom cylinder (43), and multiple first brake grooves (415) are evenly distributed along the circumference of the bottom shaft (419). The number of first brake grooves (415) and second brake grooves (433) is equal. The interior of the brake ring (44) is set as a stepped structure with a larger bottom and a smaller top, and two rings of brake posts (441) are arranged vertically on the inner side of the brake ring (44). The two rings of brake posts (441) are respectively installed in the first brake groove (415) and the second brake groove (433).

8. A cold-rolled steel coil straightening device according to claim 7, characterized in that, A spring (417) in a compressed state is sleeved on the bottom shaft (419), and the two ends of the spring (417) are in contact with the bottom plate (413) and the brake ring (44) respectively; a limit bolt (414) is provided through the side of the bottom plate (413), and the bottom of the limit bolt (414) can be threaded into the threaded hole (442) of the brake ring (44).

9. A cold-rolled steel coil straightening device according to claim 3, characterized in that, A fixing plate (435) is provided on the top of the bottom cylinder (43), and a clamping plate (434) is fitted on the bottom cylinder (43). The fixing plate (435) and the clamping plate (434) are distributed on the upper and lower sides of the support beam (11), and the stud installed below the fixing plate (435) passes through the support beam (11) and the clamping plate (434).

10. A cold-rolled steel coil alignment device according to claim 1, characterized in that, It also includes an adjusting rod assembly (5), which includes an internally threaded tube (51), two threaded posts (53) that are respectively threaded into both ends of the internally threaded tube (51), and two sets of connecting clamps (54) respectively installed on the two threaded posts (53) at opposite ends. The connecting clamps (54) include a fixed arc plate (541) and a clamping arc plate (542) that are detachably connected. The side walls of the fixed arc plate (541) and the clamping arc plate (542) that are close to each other are both set as curved surfaces. The end ball (33) installed at the end of the shaft of the correction roller (3) is located in the space formed by the fixed arc plate (541) and the clamping arc plate (542).

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