Tension levelling production line, strip steel levelling production method and strip steel trimming production method

Abstract

This application discloses a strip straightening production line, a strip straightening production method, and a strip trimming production method, solving the technical problem of high cost in existing strip straightening production lines. The strip straightening production line includes an uncoiler, a coiler, a tension roller group, a guide roller group, and a disc shear. The guide roller group and the tension roller group are arranged side-by-side vertically and above the tension roller group. The guide roller group includes a base, several guide rollers located on the base, and several guide plates. The guide rollers are spaced apart along the strip conveying direction, with at least two guide rollers at different heights. A guide plate is provided between any two adjacent guide rollers. By setting the guide roller group vertically in the tension roller area, i.e., designing a double-layer steel passage in the tension roller area, it is possible to switch between three production modes: single straightening, single trimming, and trimming plus straightening, respectively, meeting personalized production needs while reducing production costs.

Description

Technical Field

[0001] This application belongs to the field of hot-rolled strip steel technology, specifically relating to a strip straightening production line, a strip straightening production method, and a strip trimming production method. Background Technology

[0002] Hot-rolled strip steel typically undergoes straightening, leveling, edge trimming, and slitting operations on a tension leveling line before entering the next process to meet customer requirements for strip size and dimensions. To satisfy diverse customer needs, tension leveling lines are generally equipped with uncoilers, straighteners, welding machines, tension roller sets, tension levelers, cross-cutting shears, disc edge trimmers, and coilers. Tension roller sets and tension levelers are used to improve the strip's shape and level, while disc shears are used to trim the strip's edges, eliminating edge defects and improving width accuracy. However, the more equipment a production line has, the higher its operating costs become. Furthermore, the operational characteristics of each piece of equipment can limit production output. For example, tension rollers located in the steel passageway require all of them to be operational during production. Summary of the Invention

[0003] To address the high cost of current strip straightening production lines, this application provides a strip straightening production line, a strip straightening production method, and a strip trimming production method.

[0004] In a first aspect of this application, a tension straightening production line is provided, comprising: An uncoiler is used to unwind hot-rolled steel coils into strips; A coiler is used to coil steel strip into coils; Tension roller assembly is located between the uncoiler and the coiler; A guide roller assembly is disposed between the uncoiler and the coiler. The guide roller assembly and the tension roller assembly are arranged side by side in the vertical direction and the guide roller assembly is positioned above the tension roller assembly. The guide roller assembly includes a base, a plurality of guide rollers disposed on the base, and a plurality of guide plates. The plurality of guide rollers are spaced apart along the conveying direction of the strip steel, and at least two of the guide rollers are at different heights. A guide plate is provided between any two adjacent guide rollers. A disc shear, used to trim the strip steel, is positioned between the tension roller group and the coiler; Wherein, when the strip needs to be straightened, the strip may be selectively conveyed along the tension roller group; when the strip needs to be trimmed, the strip may be selectively conveyed along the guide roller group; when the strip needs to be straightened and trimmed, the strip may be selectively conveyed along the tension roller group.

[0005] In some embodiments, the end of the guide roller is rotatably connected to the base; the axis of the guide roller is perpendicular to the conveying direction of the strip. The number of guide rollers is 2N+1, and the number of guide plates is 2N; the 2N+1 guide rollers form a triangular structure.

[0006] In some embodiments, 2N+1 of the guide rollers form an isosceles triangle structure, with one guide roller located at the apex of the triangle and the remaining 2N guide rollers arranged symmetrically along the longitudinal center line of the triangle structure.

[0007] In some embodiments, there are three guide rollers and two guide plates, with both guide plates set at an angle to the horizontal plane.

[0008] In some embodiments, the guide plate makes an angle of 5° to 20° with the horizontal plane.

[0009] In some embodiments, the guide plate includes a first connecting rod, a second connecting rod, and a plurality of connecting plates disposed between the first connecting rod and the second connecting rod. The first connecting rod and the second connecting rod are spaced apart along the strip conveying direction, and the plurality of connecting plates are spaced apart along the extension direction of the first connecting rod to form an operating space exposing the tension roller assembly. Both the first connecting rod and the second connecting rod are connected to the base.

[0010] In some embodiments, there are two connecting plates, one of which is located at the first end near the first connecting rod; the other connecting plate is located at the second end near the first connecting rod.

[0011] In some embodiments, the tension roller group includes an inlet tension roller group and an outlet tension roller group; the tension straightening production line includes an uncoiling pinch roll, a straightening roller group, an inlet cross shear, an automatic welding machine, a front pinch roll, the inlet tension roller group, a scale breaking tension straightening machine, the outlet tension roller group, a rear pinch roll, a three-roll straightening machine, a disc shear, a double pressure roller, an outlet cross shear, and a winding pinch roll, arranged sequentially along the conveying direction.

[0012] In a second aspect of this application, a strip straightening production method is provided, based on the above-mentioned tension straightening production line, comprising the following steps: Start the uncoiler and uncoil the strip steel using the uncoiler; Start the tension roller group to convey the strip steel to the disc shear; Start the disc shears to trim the strip steel. Start the coiler to bend the strip steel into a coil.

[0013] In a third aspect of this application, based on the above-mentioned tension straightening production line, the following steps are included: Start the uncoiler and uncoil the strip steel using the uncoiler; The tension roller group is turned off, and the strip is conveyed to the coiler via the guide roller group; Start the coiler to bend the strip steel into a coil.

[0014] According to one or more embodiments of this application, a tension leveling production line, a strip straightening production method, and a strip trimming production method are provided. The tension leveling production line includes an uncoiler, a coiler, a tension roller group, a guide roller group, and a disc shear. The uncoiler is used to unwind hot-rolled steel coils into strip steel; the coiler is used to coil the strip steel into a coil; the tension roller group is disposed between the uncoiler and the coiler; the guide roller group is disposed between the uncoiler and the coiler, and the guide roller group and the tension roller group are arranged side by side in the vertical direction and above the tension roller group; the guide roller group includes a base and a guide roller group disposed on the base. The system includes several guide rollers and guide plates, with the guide rollers spaced apart along the conveying direction of the strip steel, and at least two guide rollers at different heights. A guide plate is positioned between any two adjacent guide rollers. A disc shear, located between the tension roller group and the coiler, is used to trim the strip steel edges. When the strip steel needs straightening, it can be selectively conveyed along the tension roller group; when the strip steel needs edge trimming, it can be selectively conveyed along the guide roller group; and when both straightening and edge trimming are required, the strip steel can be selectively conveyed along the tension roller group. By setting guide roller groups vertically in the tension roller area, i.e., designing a double-layer steel passage in the tension roller area, it is possible to switch between three production modes: single straightening, single edge trimming, and edge trimming plus straightening, respectively, meeting personalized production needs while reducing production costs. This system provides a tension straightening production line equipment configuration and production mode that can adapt to the edge trimming or straightening requirements of different strip steel products. Attached Figure Description

[0015] Figure 1 A schematic diagram of the tension straightening production line in one or more embodiments of this application is shown.

[0016] Figure 2 It shows Figure 1 A schematic diagram of the structure of the guide roller group and tension roller group.

[0017] Figure 3 It shows Figure 2 Top view of the guide roller assembly and tension roller assembly.

[0018] Figure 4 It shows Figure 2 A schematic diagram of the guide plate.

[0019] Explanation of reference numerals in the attached drawings: 10-Tension straightening production line, 100-Uncoiler, 200-Winder, 300-Tension roller group, 310-Inlet tension roller group, 320-Outlet tension roller group, 400-Guide roller group, 410-Base, 420-Guide roller, 421-First guide roller, 422-Second guide roller, 423-Third guide roller, 430-Guide plate, 431-First connecting rod, 432-Second connecting rod, 433-Connecting plate, 500-Disc shear, 600-Uncoil pinch roll, 700-Straightening roller group, 800-Inlet cross shear, 900-Automatic welding machine, 910-Front pinch roll, 920-Scale breaking tension straightening machine, 930-Rear pinch roll, 940-Three-roller correction machine, 950-Double pressure roller, 960-Outlet cross shear, 970-Winder pinch roll. Detailed Implementation

[0020] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] In a traditional tension leveling production line, steel coils are uncoiled by an uncoiler, pass through inlet equipment such as pinch rollers and welding machines, and then enter straightening equipment such as tension rollers and tension levelers to straighten their shape. Next, a disc shear removes edge defects, and finally, a coiler rewinds the coils. The disc shear is located on both sides of the steel passageway and can be used selectively depending on production needs; the tension rollers and tension levelers are located within the steel passageway and must be fully operational during production.

[0022] Therefore, in order to solve the above problems, this application provides a strip straightening production line, a strip straightening production method, and a strip trimming production method.

[0023] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4According to a first aspect of this application, a tension leveling production line 10 is provided, comprising an uncoiler 100, a coiler 200, a tension roller group 300, a guide roller group 400, and a disc shear 500. The uncoiler 100 is used to unwind hot-rolled steel coils into strip steel; the coiler 200 is used to coil the strip steel into a coil; the tension roller group 300 is disposed between the uncoiler 100 and the coiler 200; the guide roller group 400 is disposed between the uncoiler 100 and the coiler 200, and the guide roller group 400 is arranged parallel to the tension roller group 300 in the vertical direction and is disposed above the tension roller group 300; the guide roller group 400 includes a base 410, and a guide roller group disposed on the base 410. A plurality of guide rollers 420 and a plurality of guide plates 430 are provided. The guide rollers 420 are spaced apart along the conveying direction of the strip, and at least two guide rollers 420 are at different heights. A guide plate 430 is provided between any two adjacent guide rollers 420. A disc shear 500 is used to trim the strip and is located between the tension roller group 300 and the coiler 200. Wherein, when the strip needs to be straightened, the strip can be selectively conveyed along the tension roller group 300; when the strip needs to be trimmed, the strip can be selectively conveyed along the guide roller group 400; when the strip needs to be straightened and trimmed, the strip can be selectively conveyed along the tension roller group 300.

[0024] The guide roller group 400 and the tension roller group 300 are arranged side by side in the vertical direction, which can form a dual-channel area in the tension roller group 300 area of ​​the tension roller group 10. If the strip needs to be straightened or if straightening and trimming operations are required, the tension roller group 300 can be started. The strip is straightened by passing through the tension roller group 300 in the tension roller group 300 area. At this time, no strip is conveyed along the guide roller group 400. If the strip does not need to be straightened, the tension roller group 300 can be turned off, and the strip is conveyed along the guide roller group 400.

[0025] Therefore, by setting guide roller group 400 in the vertical direction of the tension roller area, i.e., designing a double-layer steel passage in the tension roller area, it is possible to switch between three production modes: single straightening, single trimming, and trimming plus straightening, respectively, to meet personalized production needs while reducing production costs. This allows for the configuration and production modes of the tension straightening production line 10, which can adapt to the trimming or straightening requirements of different strip steel products.

[0026] In some embodiments, the end of the guide roller 420 is rotatably connected to the base 410; the axis of the guide roller 420 is perpendicular to the conveying direction of the strip; compared to the tension roller group 300, the guide roller 420 mainly relies on the conveying of the strip to provide guidance and does not require the use of mechanical energy. Whether the strip needs to pass through the tension roller group 300 can be selected according to the production needs. If only edge trimming is required, the strip can pass through the guide roller group 400; if straightening and shape improvement are required, the strip can pass through the tension roller group 300. In some embodiments, the upper ends of the guide roller 420 can be fixed to bearing seats by rolling bearings, and the bearing seats are mounted on the base 410, allowing the guide roller 420 to rotate freely relative to the base 410 around its axis.

[0027] In some embodiments, the number of guide rollers 420 is 2N+1, and the number of guide plates 430 is 2N; the 2N+1 guide rollers 420 form a triangular structure. The triangular arrangement of the guide rollers 420 provides installation space for the tension roller group 300 below the guide rollers 420, ensuring that the strip can be smoothly conveyed on the guide rollers 420 or the tension roller group 300. The triangular arrangement of the guide rollers 420 can lift the strip and then gently lower it, ensuring smooth conveying of the strip. Furthermore, a guide plate 430 is provided between two adjacent guide rollers 420, which serves to support the strip.

[0028] In some embodiments, 2N+1 guide rollers 420 form an isosceles triangle structure, with one guide roller 420 located at the apex of the triangle and the remaining 2N guide rollers 420 symmetrically arranged along the longitudinal centerline of the triangle structure. The isosceles triangular arrangement of guide rollers 420 creates an inverted V-shaped path for the strip, forming a conveying channel that first rises and then falls during strip conveying, ensuring smooth strip conveying while providing space for the tension roller group 300.

[0029] In some embodiments, three guide rollers 420 and two guide plates 430 are provided, with both guide plates 430 being angled relative to the horizontal plane. The three guide rollers 420 are respectively referred to as the first guide roller 421, the second guide roller 422, and the third guide roller 423, and the two guide plates 430 are respectively referred to as the first guide plate 430 and the second guide plate 430. The base 410 is a boss-shaped structure, with the middle protruding for mounting the second guide roller 422, and the two ends of the convex shape for mounting the first guide roller 421 and the third guide roller 423, respectively. The first guide roller 421, the second guide roller 422, and the third guide roller 423 are mounted on the base 410 and can be fixed to the bearing seat by rolling bearings. The bearing seat is mounted on the base 410, allowing the guide rollers 420 to rotate freely relative to the base 410 around their axes.

[0030] In some embodiments, the first guide roller 421 and the third guide roller 423 are located on the same horizontal plane, and the height of the second guide roller 422 is higher than the height of the first guide roller 421 and the third guide roller 423, thereby forming an inverted V-shaped path. After the second guide roller 422 lifts the strip, the inclined surfaces between the first guide roller 421 and the second guide roller 422, as well as the inclined surfaces between the second guide roller 422 and the third guide roller 423, are symmetrical. The inclined surfaces on both sides can prevent the strip from deviating or running off course, and can promptly straighten the strip, ensuring stable conveying of the strip.

[0031] In some embodiments, after the first guide plate 430 and the second guide plate 430 are mounted on the base 410, the height of the first guide plate 430 and the second guide plate 430 is slightly lower than the height of the top of the guide rollers 420 adjacent to each other at both ends. That is, while being able to support the strip steel, it can also avoid interfering with the rotation of the guide rollers 420, thus ensuring the normal rotation of the guide rollers 420.

[0032] In some embodiments, the angle between the guide plate 430 and the horizontal plane is 5° to 20°, and the angle between the guide plate 430 and the horizontal plane can be 5°, 8°, 10°, 12.5°, 15°, 17°, or 20°. This allows the guide plate 430 to simultaneously serve the purposes of supporting and guiding materials.

[0033] In some embodiments, the guide plate 430 includes a first connecting rod 431, a second connecting rod 432, and a plurality of connecting plates 433 disposed between the first connecting rod 431 and the second connecting rod 432. The first connecting rod 431 and the second connecting rod 432 are spaced apart along the strip conveying direction, and the plurality of connecting plates 433 are spaced apart along the extending direction of the first connecting rod 431 to form an operating space exposed to the tension roller assembly 300. The first connecting rod 431, the second connecting rod 432, and the plurality of connecting plates 433 are integrally formed, and the guide plate 430 can serve the purpose of supporting the material. In addition, the plurality of connecting plates 433 are spaced apart to form a hollow operating space. When the strip is conveyed along the tension roller assembly 300, the operator can stand on the connecting plates 433 and pull the strip through the hollow operating space to ensure the normal conveying of the strip along the tension roller assembly 300. Furthermore, during the production process, the operating space facilitates daily inspection of the tension roller equipment below the guide plate.

[0034] In some embodiments, the first connecting rod 431 and the second connecting rod 432 are welded together to form an integral frame structure for supporting the guide plate 433. The guide plate 433 and the above-mentioned integral frame can be fixed with bolts. The guide plate 433 can be a resin plate, such as a polyethylene plate, which can be wear-resistant and prevent scratches on the strip steel.

[0035] In other embodiments, both the first connecting rod 431 and the second connecting rod 432 are connected to the base 410. The first connecting rod 431 has two oppositely arranged ends, and both the first and second ends of the first connecting rod 431 are provided with connecting blocks. The first and second ends of the second connecting rod 432 are also provided with connecting blocks. The connecting blocks and the base 410 can be connected by bolts, which facilitates easy disassembly and assembly for later equipment maintenance.

[0036] In some embodiments, two connecting plates 433 are provided, one connecting plate 433 is located at the first end near the first connecting rod 431; the other connecting plate 433 is located at the second end near the first connecting rod 431. That is, the two connecting plates 433 are located at the two ends of the first connecting rod 431 and the second connecting rod 432, respectively, thereby exposing the middle section of the tension roller group 300. Under normal circumstances, the strip steel is conveyed through the middle section of the tension roller group 300. The operating space is exposed in the middle section of the tension roller group 300, which facilitates the operator to pull the strip steel and ensures the normal conveying of the strip steel along the tension roller group 300.

[0037] In some embodiments, the tension roller group 300 includes an inlet tension roller group 310 and an outlet tension roller group 320; in some embodiments, both the inlet tension roller group 310 and the outlet tension roller group 320 are provided with guide roller groups 400 in the vertical direction. This allows for switching between three production modes: single straightening, single edge trimming, and edge trimming plus straightening, meeting personalized production needs while reducing production costs.

[0038] In some embodiments, the tension straightening production line 10 includes, in sequence along the conveying direction, an uncoiling pinch roll 600, a straightening roll group 700, an inlet cross shear 800, an automatic welding machine 900, a front pinch roll 910, an inlet tension roll group 310, a scale breaking tension straightening machine 920, an outlet tension roll group 320, a rear pinch roll 930, a three-roll alignment machine 940, a disc shear 500, a double pressure roll 950, an outlet cross shear 960, and a winding pinch roll 970.

[0039] During production, the strip steel first passes through the uncoiler 100, which expands and continuously unwinds the horizontal steel coil, establishing initial back tension for supplying the entire line. The uncoiler pinch roll 600 bites and feeds the strip head, working with the straight-head shovel to complete the threading, and provides instantaneous braking to prevent loosening during coil changes. The straightening roll group 700 initially flattens the bent strip head, eliminating large curvature and ensuring smooth subsequent threading. The inlet cross-cutting 800 cuts off the excess section or weld seam at the strip head, providing a neat, right-angled new head for easy welding and threading. The automatic welding machine 900 performs online welding of the front and rear coil heads and tails, enabling coil changes without stopping the machine and maintaining continuous tension throughout the line. The front pinch roll 910 provides stable clamping for the welding machine and tension rolls, ensuring zero slippage during welding. The inlet tension roll group 310 establishes a certain tension, forming the tension difference required for straightening with the outlet tension roll. The scale-breaking straightening machine 920 repeatedly bends and stretches, breaking up iron oxide scale, improving strip shape, and eliminating yield plateaus. The exit tension roller group 320 maintains constant tension at the front end, absorbs changes in elongation, and prevents tension fluctuations from affecting the disc shear 500. The rear pinch roller 930 briefly clamps the strip, works with the tension roller to switch tension, and provides a stable entry speed for the disc shear 500. The three-roller alignment machine 940 uses photoelectric closed-loop to instantly correct the strip centerline, ensuring a cutting edge width accuracy of ±1 mm. The disc shear 500 continuously cuts longitudinally, removing cracks and oxidized edges, refining the width to contract tolerances, and breaking or coiling waste edges online. The double pressure rollers 950 press the strip to prevent edge warping after cutting and also prevent strip drift during high-speed operation. The exit cross-cutting 960 cuts the strip into steel plates according to length or sampling requirements, or removes unqualified sections at the tail. The coiling pinch roller 970 provides initial clamping force for the coiler 200 to bite into the strip head, preventing loosening and misalignment. Coiler 200: Under constant tension, the finished strip steel is re-coiled into a dense steel coil, completing the finishing process and facilitating its transport out of the factory.

[0040] Therefore, by installing the above-mentioned equipment in the tension straightening production line 10, it is ensured that the finished strip steel is rolled into a dense steel coil.

[0041] In a second aspect of this application, a strip straightening production method is provided, based on the above-described strip straightening production line 10, comprising the following steps: Start the uncoiler 100 and uncoil the strip steel through the uncoiler 100; Understandably, the safe, continuous, and tensioned unfolding of steel coils through the uncoiler 100, providing a stable, centered, and controllable feed head for the entire production line, is a prerequisite for continuous production.

[0042] Start the tension roller group 300 and convey the strip steel to the disc shear 500 through the tension roller group 300; Understandably, strip straightening requires the use of tension roller group 300. Therefore, when tension roller group 300 is started, inlet tension roller group 310 establishes a certain tension, creating the tension difference required for straightening with the outlet tension roller. Outlet tension roller group 320 maintains constant tension at the front end, absorbing changes in elongation and preventing tension fluctuations from affecting the disc shear 500.

[0043] Start the disc shear 500 to cut the strip steel edges; Understandably, the 500-inch disc shear can continuously cut longitudinal edges, removing cracks and oxidized edges, and finishing the width to the contract tolerance. Waste edges are broken or rolled up online.

[0044] Start the coiler 200 to bend the strip steel into a coil.

[0045] Understandably, the coiler 200 rewinds the finished strip steel into a dense coil under constant tension, completing the finishing process and facilitating its transport out of the factory.

[0046] Therefore, combined with other equipment in the strip straightening production line 10, the strip straightening production method is as follows: the steel coil is uncoiled in the uncoiler 100, and then passes through the uncoiler pinch roll 600, straightening roll group 700, inlet cross shear 800, automatic welding machine 900, front pinch roll 910, inlet tension roll group 310, scale breaking straightening machine 920, outlet tension roll group 320, rear pinch roll 930, three-roll correction machine 940, double pressure roll 950, outlet cross shear 960, coiling pinch roll 970, and coiler 200 to complete the strip straightening.

[0047] Since no edge trimming is required during the straightening process, the 500 disc shear is turned off.

[0048] If the strip steel needs to be trimmed, the 500 disc shear can be turned on.

[0049] Therefore, combined with other equipment in the strip straightening production line 10, the strip edge trimming and straightening production method is as follows: the steel coil is uncoiled in the uncoiler 100, and then passes through the uncoiler pinch roll 600, straightening roll group 700, inlet cross shear 800, automatic welding machine 900, front pinch roll 910, inlet tension roll group 310, scale breaking straightening machine 920, outlet tension roll group 320, rear pinch roll 930, three-roll correction machine 940, disc shear 500, double pressure roll 950, outlet cross shear 960, coiling pinch roll 970, and coiler 200 to complete the strip shape straightening and edge trimming.

[0050] A third-party aspect of this application provides a method for producing strip edge trimming, based on the above-mentioned tension leveling production line 10, comprising the following steps: S100: Start the uncoiler 100 and uncoil the strip steel through the uncoiler 100; It is understandable that safely, continuously, and with tension, unwinding the steel coil through the uncoiler 100 to provide a stable, centered, and controllable feed head for the entire production line is a prerequisite for continuous production.

[0051] S200: Close the tension roller group 300 and convey the strip steel to the coiler 200 via the guide roller group 400; Understandably, if the strip only needs to be trimmed and not straightened, it is not necessary to pass the strip through the tension roller group 300. Instead, the strip can be passed through the guide roller group 400. The guide roller 420 mainly relies on the conveying of the strip to provide guidance. Compared with the tension roller group 300, the guide roller group 400 does not require the use of mechanical energy, which can meet the needs of personalized production while reducing production costs.

[0052] S300: Start the coiler 200 to bend the strip steel into a coil.

[0053] Understandably, the coiler 200 rewinds the finished strip steel into a dense coil under constant tension, completing the finishing process and facilitating its transport out of the factory.

[0054] Therefore, combined with other equipment in the straightening production line 10, the strip edge trimming and straightening production method is as follows: Strip single edge trimming production method: The steel coil is uncoiled in the uncoiler 100, and passes through the uncoiler pinch roll 600, straightening roll group 700, inlet cross shear 800, automatic welding machine 900, front pinch roll 910, inlet guide plate device, inlet guide roller device, scale breaking straightening machine 920, outlet guide plate device, outlet guide plate device, rear pinch roll 930, three-roll straightening machine 940, disc shear 500, double pressure roll 950, outlet cross shear 960, coiling pinch roll 970, and coiler 200 to complete the strip edge trimming.

[0055] In addition, the scale breaking and straightening machine 920 in the above equipment can be turned off.

[0056] Therefore, this application can selectively operate according to product requirements, specifically as follows:

[0057] 1) According to product requirements, if the strip steel needs to be straightened and trimmed, then during production, the strip steel is uncoiled by the uncoiler 100, and then enters the tension roller area after passing through the inlet equipment such as the uncoiler pinch roll 600, straightening roll group 700, inlet cross shear 800, automatic welding machine 900, and front pinch roll 910. The strip steel is manually threaded into the inlet tension roller group 310, scale breaking and straightening machine 920, and outlet tension roller group 320. After exiting the tension roller area, it enters the outlet equipment such as the rear pinch roll 930, three-roll straightening machine 940, disc shear 500, double pressure roller 950, outlet cross shear 960, and coiling pinch roll 970. Finally, it enters the coiler 200 to complete the rewinding.

[0058] 2) If the strip steel only requires edge trimming according to product requirements, then during production, the strip steel is uncoiled by the uncoiler 100, and then enters the tension roller area after passing through the uncoiler pinch roll 600, straightening roll group 700, entrance cross shear 800, automatic welding machine 900, front pinch roll 910 and other entrance equipment. The strip steel is manually threaded into the entrance guide plate and entrance guide roller device above the entrance tension roller. After passing through the scale breaking and straightening machine 920, it enters the exit guide plate and exit guide roller device above the exit tension roller. After exiting the tension roller area, it enters the exit equipment such as the rear pinch roll 930, three-roll straightening machine 940, disc shear 500, double pressure roller 950, exit cross shear 960, coiling pinch roll 970 and other exit equipment. Finally, it enters the coiler 200 to complete the rewinding.

[0059] 3) If the strip only requires straightening according to product requirements, then during production, the strip is uncoiled by the uncoiler 100, and then enters the tension roller area after passing through the uncoiler pinch roll 600, straightening roll group 700, entrance cross shear 800, automatic welding machine 900, front pinch roll 910 and other entrance equipment. The strip is then manually threaded into the entrance tension roller group 310, scale breaking and straightening machine 920, and exit tension roller group 320. After exiting the tension roller area, it enters the exit equipment such as the rear pinch roll 930, three-roll straightening machine 940, double pressure roll 950, exit cross shear 960, and coiling pinch roll 970. Finally, it enters the coiler 200 to complete the rewinding.

[0060] Through the above embodiments, this application has the following beneficial effects or advantages: 1) This application optimizes the input mode of tension roller equipment by designing a double-layer steel passage in the tension roller area. During production, different channels can be selected according to the straightening and trimming requirements of the strip steel, enabling switching between three production modes: single straightening, single trimming, and trimming plus straightening. This meets personalized production needs while reducing production costs. The application also provides a tension straightening production line 10 with equipment configuration and production modes that can adapt to the trimming or straightening requirements of different strip steel products.

[0061] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0062] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0063] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0065] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A withdrawal and straightening line, characterized in that, include: An uncoiler is used to unwind hot-rolled steel coils into strips; A coiler is used to coil steel strip into coils; Tension roller assembly is located between the uncoiler and the coiler; A guide roller assembly is disposed between the uncoiler and the coiler. The guide roller assembly and the tension roller assembly are arranged side by side in the vertical direction and the guide roller assembly is positioned above the tension roller assembly. The guide roller assembly includes a base, a plurality of guide rollers disposed on the base, and a plurality of guide plates. The plurality of guide rollers are spaced apart along the conveying direction of the strip steel, and at least two of the guide rollers are at different heights. A guide plate is provided between any two adjacent guide rollers. A disc shear, used to trim the strip steel, is positioned between the tension roller group and the coiler; Wherein, when the strip needs to be straightened, the strip may be selectively conveyed along the tension roller group; when the strip needs to be trimmed, the strip may be selectively conveyed along the guide roller group; when the strip needs to be straightened and trimmed, the strip may be selectively conveyed along the tension roller group.

2. The pull-chilling line according to claim 1, characterized in that, The end of the guide roller is rotatably connected to the base; the axis of the guide roller is perpendicular to the conveying direction of the strip steel. The number of guide rollers is 2N+1, and the number of guide plates is 2N; the 2N+1 guide rollers form a triangular structure.

3. The pull-chilling line according to claim 2, characterized in that, The 2N+1 guide rollers form an isosceles triangle structure, with one guide roller located at the apex of the triangle and the remaining 2N guide rollers arranged symmetrically along the longitudinal center line of the triangle structure.

4. The pull-chilling line according to claim 3, characterized in that, The guide rollers are provided in three units, and the guide plates are provided in two units, with both guide plates set at an angle to the horizontal plane.

5. The pull-chilling line according to claim 4, characterized in that, The angle between the guide plate and the horizontal plane is 5° to 20°.

6. The withdrawal and straightening line according to any one of claims 1-5, characterized in that, The guide plate includes a first connecting rod, a second connecting rod, and a plurality of connecting plates disposed between the first connecting rod and the second connecting rod. The first connecting rod and the second connecting rod are spaced apart along the strip conveying direction, and the plurality of connecting plates are spaced apart along the extension direction of the first connecting rod to form an operating space that exposes the tension roller assembly. Both the first connecting rod and the second connecting rod are connected to the base.

7. The pull-chilling line according to claim 6, characterized in that, The connecting plate is provided in two parts, one of which is located at the first end near the first connecting rod; the other connecting plate is located at the second end near the first connecting rod.

8. The withdrawal and straightening line according to any one of claims 1-5, characterized in that, The tension roller group includes an inlet tension roller group and an outlet tension roller group; the tension straightening production line includes an uncoiling pinch roll, a straightening roller group, an inlet cross shear, an automatic welding machine, a front pinch roll, the inlet tension roller group, a scale breaking tension straightening machine, the outlet tension roller group, a rear pinch roll, a three-roll correction machine, a disc shear, a double pressure roller, an outlet cross shear, and a winding pinch roll, arranged sequentially along the conveying direction.

9. A method for the production of a strip steel straightening, based on the stretch-straightening line according to any one of claims 1-8, characterized in that, Includes the following steps: Start the uncoiler and uncoil the strip steel using the uncoiler; Start the tension roller group to convey the strip steel to the disc shear; Start the disc shears to trim the strip steel. Start the coiler to bend the strip steel into a coil.

10. A method for producing strip edge trimming, based on the tension leveling production line according to any one of claims 1-8, characterized in that, Includes the following steps: Start the uncoiler and uncoil the strip steel using the uncoiler; The tension roller group is turned off, and the strip is conveyed to the coiler via the guide roller group; Start the coiler to bend the strip steel into a coil.

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