A device for turning over a steel sheet and correcting a turtleback defect

Abstract

The application discloses a steel plate turning and turtle-back defect correcting device, and belongs to the technical field of steel plate production. The device comprises two guide rails, a transverse moving frame body which is slidably connected to the guide rails, a longitudinal pressing roller assembly which is slidably connected to the transverse moving frame body, a steel plate supporting assembly which is arranged at the middle part of the guide rails, and a plate turning assembly which is arranged at one side of the upper part of the steel plate supporting assembly. The device can effectively repair the turtle-back and reverse turtle-back defects of the limit wide-thick specification steel plate, improve the yield of the transversely cut open flat steel plate, separate the correcting process from the transverse cutting line, significantly reduce the equipment load and risk of the transverse cutting line, and effectively avoid the phenomena that the existing transverse cutting line open flat steel plate is prone to produce the turtle-back and reverse turtle-back defects under the limit thickness and width specification, the straightening machine load is too large, and the yield is low. The device comprises two guide rails which are arranged in parallel along the length direction of the steel plate.

Description

Technical Field

[0001] This invention belongs to the field of steel plate production technology, specifically a device for turning over steel plates and correcting turtle-back defects. Background Technology

[0002] In steel production, cross-cutting is a crucial process for leveling steel coils into steel plates, and its leveling effect directly impacts the plate's shape and quality. The cross-cutting line not only cuts the steel coil but also significantly influences the flatness and geometry of the steel plate. Typically, different cross-cutting lines are suitable for leveling steel plates with varying thicknesses and widths. When the thickness and width of the steel coil to be leveled approach the upper limit of the cross-cutting line's capabilities, the leveled steel plate is prone to developing a "turtle-back" defect, characterized by a central arch.

[0003] As the thickness and width of the steel coil increase, the hump defects after the steel plate is leveled become more pronounced. Under the same straightener reduction, the hump on the steel plate corresponding to the inner ring of the coil is usually much larger than that on the outer ring. This is because the inner ring of the coil experiences greater concentration of bending stress and residual stress during the leveling process, making the central area more prone to arching. Increasing the reduction of the straightener is a common method to improve the plate shape, but practice has shown that excessively increasing the reduction has limited effect on improving the hump of medium-thick steel coils, and may even lead to overload of the straightener drive shaft, increased equipment vibration, or fatigue damage to components, thus seriously affecting the safe operation of the cross-cutting straightener equipment.

[0004] When steel coils are flattened into steel plates, if the turtle-back defect exceeds the allowable standard, they have to be re-judged or directly scrapped. This not only reduces the product yield, but also increases production costs and wastes resources. Summary of the Invention

[0005] The purpose of this invention is to provide a steel plate flipping and turtle-back defect correction device to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] A device for correcting steel plate flipping and turtle-back defects is provided, comprising two guide rails, a transversely movable frame slidably connected to the two guide rails, a longitudinal pressure roller assembly slidably connected to the transversely movable frame, a steel plate support assembly disposed in the middle of the two guide rails, and a flipping plate assembly disposed on one side of the upper part of the steel plate support assembly.

[0007] Furthermore, several sets of lateral moving wheels are provided on both sides of the lateral moving frame, and the sets of lateral moving wheels are slidably connected to the guide rail.

[0008] Furthermore, the longitudinal pressure roller assembly includes a longitudinal mounting frame, and two lifting cylinders are provided at the bottom of the longitudinal mounting frame. Support plates are fixedly connected to the two lifting cylinders, and extrusion rollers are rotatably connected to the two support plates.

[0009] Furthermore, a sliding groove is provided on the transversely moving frame, and a longitudinal pressure roller assembly is slidably connected in the sliding groove.

[0010] Furthermore, the extrusion roller is a stepped extrusion roller, with stepped portions provided on both sides of the extrusion roller.

[0011] Furthermore, the steel plate support assembly includes a main support platform, on which a plurality of hydraulic cylinder support assemblies are arranged, and the plurality of hydraulic cylinder support assemblies are distributed in a layered array on the main support platform.

[0012] Furthermore, a placement groove is provided on one side of the upper part of the main support platform, and a flip-plate assembly is provided on one side of the placement groove.

[0013] Furthermore, the flap assembly includes several flipping cylinders, which are disposed on one side of the upper part of the main support platform. The telescopic ends of the flipping cylinders are hinged to flaps, and a reinforcing plate is provided on one side of the upper part of the flaps.

[0014] Furthermore, the hydraulic cylinder support assembly includes a support cylinder, the telescopic end of which is fixedly connected to a hemispherical support block, a connecting block is provided on the hemispherical support block, and a contact plate is fixedly connected to the connecting block.

[0015] Furthermore, several rubber strips are provided on the upper part of the flip plate on the side away from the flipping cylinder.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] For steel plates with turtle-back defects, start the lateral moving frame to move longitudinally along the guide rail, adjust the longitudinal pressure roller assembly to the defect area and press down to locally roll the steel plate. After the rolling is completed, measure the improvement of the defect, and repeat the operation until it meets the technical requirements. For reverse turtle-back steel plates, first hoist the steel plate onto the support assembly, adjust the extension of the hydraulic cylinder to form an inclined slope towards the flipping plate, so that the steel plate gradually tilts towards the flipping plate under its own weight. After the steel plate is close to the flipping plate, control the flipping plate cylinder to make the steel plate fall from vertical to horizontal with the side plate to complete the flipping. Then, roll the steel plate for repair according to the turtle-back defect steel plate correction process. Through the above structure and operation, this device can effectively repair the turtle-back and reverse turtle-back defects of steel plates with extreme width and thickness specifications, improve the yield of cross-cut and leveled steel plates, and separate the straightening process from the cross-cutting line, significantly reducing the load and risk of the cross-cutting line equipment. It effectively avoids the phenomenon that existing cross-cutting line leveled steel plates are prone to turtle-back and reverse turtle-back defects, excessive load on the straightening machine, and low yield under extreme thickness and width specifications. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 A schematic diagram of the overall structure of a steel plate flipping and turtle-back defect correction device; Figure 2 This is a schematic diagram of the tilted structure of the hydraulic cylinder support assembly provided by the present invention. Figure 3 This is a schematic diagram of the structure of the lateral moving frame provided by the present invention; Figure 4 A schematic diagram of the hydraulic cylinder support assembly provided by the present invention; Figure 5 This is a schematic diagram of the flap assembly structure provided by the present invention.

[0020] In the diagram: 1. Guide rail; 2. Lateral moving frame; 21. Lateral moving wheel set; 22. Sliding groove; 3. Longitudinal pressure roller assembly; 31. Longitudinal mounting frame; 32. Lifting cylinder; 33. Support plate; 34. Extrusion roller; 4. Steel plate support assembly; 41. Main support platform; 411. Placement groove; 42. Cylinder support assembly; 421. Support cylinder; 422. Hemispherical support block; 43. Connecting block; 424. Contact plate; 5. Flip plate assembly; 51. Tilting cylinder; 52. Flip plate; 53. Reinforcing plate; 54. Rubber strip. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0023] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] Please see Figure 1-5 As shown in the embodiment of the present invention, a steel plate flipping and turtle-back defect correction device includes two guide rails 1, on which a transverse moving frame 2 is slidably connected. The two guide rails 1 are arranged parallel to each other along the length of the steel plate to provide a stable and precise linear motion path for the transverse moving frame 2, ensuring that the position of the pressure roller assembly 3 is controllable and the movement is smooth during the correction process, and avoiding secondary deformation of the steel plate due to uneven loading or shaking. A longitudinal pressure roller assembly 3 is slidably connected to the transverse moving frame 2. The transverse moving frame 2 is set on the guide rails 1 by a sliding connection and can move back and forth along the length of the steel plate. The longitudinal pressure roller assembly 3 is slidably connected to the transverse moving frame 2 and can move along the width of the steel plate, and is controlled by a hydraulic cylinder or hydraulic system. The core function of the actuator, which enables vertical extension and retraction, is to apply controllable downward vertical pressure to a local area of ​​the steel plate. This releases residual stress within the steel plate through plastic deformation, thereby eliminating turtle-back or reverse turtle-back defects. A steel plate support assembly 4 is located in the middle of the two guide rails 1. The steel plate support assembly 4 is positioned in the middle area of ​​the two guide rails 1 and is used to support the steel plate to be corrected. A flipping plate assembly 5 is located on one side of the upper part of the steel plate support assembly 4. The flipping plate assembly 5 is mainly used to flip the steel plate with U-shaped (reverse turtle-back) defects. The flipping plate assembly 5 completes the flipping process of the steel plate from horizontal to vertical and back to horizontal through the flipping plate and its driving cylinder, creating the correct force direction for subsequent turtle-back defect correction. Implementation Method 1: Correction Process for Steel Plates with Turtle-Back Defects; Start the transverse moving frame 2 and move it longitudinally along the guide rail 1; position the longitudinal pressure roller assembly 3 in the transverse position and align it with the turtle-back defect area of ​​the steel plate; control the longitudinal pressure roller assembly 3 to press down and roll the steel plate locally; after the rolling is completed, measure the improvement of the turtle-back defect of the steel plate, and repeat the above steps according to the measurement results until the defect meets the technical requirements.

[0028] Implementation Method 2: Flipping and Correction Process of the Inverted Tortoise-Back Steel Plate; The steel plate with the U-shaped defect is hoisted onto the steel plate support assembly 4; the extension of the hydraulic cylinder of the steel plate support assembly 4 is adjusted so that the support platform forms a slope shape that tilts towards the flip plate 52; as the hydraulic cylinder is gradually adjusted, the steel plate tilts towards the flip plate 52 under its own weight; when the steel plate is close to the flip plate 52, the flipping cylinder 51 is controlled to move, so that the side plate falls back from the vertical state to the horizontal state, and the steel plate is flipped; the flipped steel plate is then hoisted back onto the support platform. Roller pressing repair is performed on steel plates with turtle-back defects according to the correction process. Through the above structure and working method, this device can effectively repair turtle-back and reverse turtle-back defects in steel plates with extreme width and thickness. It not only improves the yield of cross-cut and leveled steel plates, but also significantly reduces the load and risk of the cross-cutting line by separating the correction process from the cross-cutting line. This improves the safety and stability of the entire production line and has high engineering application value and promotion significance.

[0029] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, several transverse moving wheel sets 21 are arranged on both sides of the transverse moving frame 2. The transverse moving wheel sets 21 are slidably connected to the guide rail 1. The transverse moving frame 2 serves as the load-bearing and moving platform for the longitudinal pressure roller assembly 3. During operation, it not only needs to bear its own weight but also the large reaction force generated when the longitudinal pressure roller assembly 3 presses down on the steel plate. If it relies on only a single point or a few supports, problems such as local stress concentration, running jamming, or track wear are likely to occur.

[0030] Therefore, several transverse moving wheel sets 21 are set along the length direction on both sides of the transverse moving frame 2. Through multi-point distributed support, the weight of the frame and the working load are evenly distributed on the guide rail 1. From the perspective of structural mechanics, this effectively reduces the load on a single contact point, improves the overall load-bearing capacity and operational reliability. By setting several transverse moving wheel sets 21 on both sides of the transverse moving frame 2 and forming a stable and reliable sliding connection with the guide rail 1, the transverse moving frame 2 can still maintain good straightness, stability and positioning accuracy under heavy load and repeated movement conditions. This provides a reliable motion basis for the precise rolling of the longitudinal pressure roller assembly 3, thereby effectively improving the controllability and safety of the steel plate turtle back defect correction process.

[0031] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, a sliding groove 22 is provided on the transverse moving frame 2, and a longitudinal pressure roller assembly 3 is slidably connected in the sliding groove 22. The sliding groove 22 extends along the width direction of the steel plate on the transverse moving frame 2. The longitudinal pressure roller assembly 3 is embedded in the sliding groove 22 through a slider structure, so that the longitudinal pressure roller assembly 3 can be adjusted in the transverse position relative to the transverse moving frame 2. This allows the longitudinal pressure roller assembly 3 to achieve continuous adjustment of the pressure roller action point in the width direction of the steel plate without changing the overall position of the transverse moving frame 2, thereby meeting the correction needs of steel plates of different widths and different defect locations.

[0032] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, the longitudinal pressure roller assembly 3 includes a longitudinal mounting frame 31. Two lifting cylinders 32 are provided at the bottom of the longitudinal mounting frame 31. Support plates 33 are fixedly connected to the two lifting cylinders 32. Extrusion rollers 34 are rotatably connected to the two support plates 33. The transverse moving frame 2 moves the longitudinal pressure roller assembly 3 to the designated longitudinal position of the steel plate; the transverse position of the longitudinal pressure roller assembly in the sliding groove 22 is adjusted and locked; the two lifting cylinders 32 are activated to extend synchronously, driving the support plate 33 and the extrusion roller 34 to move downward; the extrusion roller 34 contacts the surface of the steel plate and applies pressure to achieve local rolling; after the rolling is completed, the lifting cylinders 32 retract, the extrusion roller 34 is lifted, and enters the next correction position.

[0033] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, the extrusion roller 34 is a stepped extrusion roller with stepped sections on both sides. The stepped extrusion roller 34 forms a structure with a central main roller section and stepped sections on both sides in the axial direction of the roller body, and its diameter varies in stages. Compared with traditional cylindrical rollers of the same diameter, this structure changes the contact state between the extrusion roller 34 and the steel plate from a single contact form to a partitioned and graded contact.

[0034] In one embodiment, see Figure 1 , Figure 2 and Figure 4As shown, the steel plate support assembly 4 includes a main support platform 41, on which several hydraulic cylinder support assemblies 42 are arranged in an array. The main support platform 41 serves as the load-bearing foundation of the steel plate support assembly 4. The hydraulic cylinder support assemblies 42 arranged in an array along the longitudinal and transverse directions allow the steel plate to be supported by multiple adjustable points throughout the support area, replacing the traditional single-sided or few-point support. By changing the extension of the hydraulic cylinders 421 at different positions, the support profile under the steel plate is actively shaped, causing the steel plate to produce controllable reverse bending or tilting under the combined action of gravity and support reaction force. This provides a basis for correcting turtleback and reverse turtleback defects and for turning the steel plate over. The extension of the middle support cylinder 421 can be reduced, while the extension of the cylinders on both sides can be increased. The extension amount makes the main support platform 41 concave laterally, which is used to assist in the correction of turtle-back defects. By adjusting the difference in the extension amount of the single-sided hydraulic cylinder, the main support platform 41 is made into a slope shape, which is used for steel plate flipping or anti-turtle-back pretreatment. It can flexibly adjust the support shape for steel plates of different widths and defect positions, improving the adaptability of the device. By setting the hydraulic cylinder support components 42 in a longitudinal and transverse array on the main support platform 41, and adopting a hydraulic control strategy of longitudinal linkage control and transverse independent control, the steel plate support components 4 can actively construct a variety of variable support shapes. This not only significantly improves the accuracy and efficiency of steel plate turtle-back and anti-turtle-back defect correction, but also enhances the equipment's adaptability to steel plates of extreme width and thickness, providing a reliable structural and control foundation for safe and high-quality steel plate flipping and correction operations.

[0035] In one embodiment, see Figure 1 , Figure 2 and Figure 4 As shown, the hydraulic cylinder support assembly 42 includes a support cylinder 421. A hemispherical support block 422 is fixedly connected to the telescopic end of the support cylinder 421. A connecting block 43 is provided on the hemispherical support block 422, and a contact plate 424 is fixedly connected to the connecting block 43. The support cylinder 421 extends or retracts according to control commands to adjust the support height. The hemispherical support block 422 automatically adjusts its posture under force. The connecting block 43 limits and supports the hemispherical support block 422. The contact plate 424 is in contact with the bottom surface of the steel plate, evenly bearing the weight of the steel plate and the roller pressure. When the extrusion roller 34 presses down on the steel plate, the central main roller section first contacts the surface of the steel plate and bears the main pressing force, while the stepped sections on both sides form secondary contact or delayed contact due to their smaller diameter or height difference, thereby forming a compressive stress distribution that gradually decreases from the middle to both sides in the width direction of the steel plate.

[0036] In one embodiment, see Figure 1 , Figure 2 and Figure 5 As shown, a placement slot 411 is provided on one side of the upper part of the main support platform 41, and a flip-plate assembly 5 is provided on one side of the placement slot 411. The main support platform 41 is adjusted by the hydraulic cylinder array to form a slope that tilts towards the flip plate assembly 5; the steel plate moves towards the placement groove 411 under its own weight; the edge of the steel plate is embedded into the placement groove 411 and is limited; the flip plate assembly 5 is activated, so that the flip plate 52 flips from a vertical or inclined state to a horizontal state, and the steel plate completes the overall flipping with the flip plate assembly 5.

[0037] In one embodiment, see Figure 1 , Figure 2 and Figure 5 As shown, the flip plate assembly 5 includes several flipping cylinders 51, which are arranged on one side of the upper part of the main support platform 41. The telescopic ends of the flipping cylinders 51 are hinged to flip plates 52. A reinforcing plate 53 is provided on one side of the upper part of the flip plate 52. After the support platform is adjusted, the steel plate tilts towards the flip plate 52. The edge of the steel plate is guided by the placement groove 411 and supported on the flip plate 52. The flipping cylinders 51 are activated to make them move synchronously. The flip plate 52 is driven by the cylinders to turn from a vertical or tilted state to a horizontal state. The steel plate is flipped with the flip plate 52 and falls stably on the main support platform 41. By adopting a flip plate 52 structure with multiple flipping cylinders 51 hinged drive and a reinforcing plate 53 on the flip plate 52, the flip plate assembly 5 has the characteristics of sufficient driving force and good flipping synchronization during the flipping process.

[0038] In one embodiment, see Figure 1 , Figure 2 and Figure 5 As shown, several rubber strips 54 are provided on the upper part of the flap 52 away from the flipping cylinder 51. During the flipping process, the steel plate gradually contacts the upper surface of the flap 52 under the action of gravity. If it is directly supported by a rigid metal surface, it is easy to generate instantaneous impact force, which may cause the steel plate edge to bump, deform or the flap 52 to suffer local impact fatigue. By providing several rubber strips 54 on the upper part of the flap 52 away from the flipping cylinder 51, the high elasticity and good energy absorption performance of the rubber material itself can play an effective buffering role at the moment of contact between the steel plate and the flap 52, thereby reducing the impact load and reducing structural vibration.

[0039] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A device for correcting steel plate flipping and turtle-back defects, comprising two guide rails (1), characterized in that, A transverse moving frame (2) is slidably connected to the two guide rails (1), and a longitudinal pressure roller assembly (3) is slidably connected to the transverse moving frame (2). A steel plate support assembly (4) is provided in the middle of the two guide rails (1), and a flip plate assembly (5) is provided on one side of the upper part of the steel plate support assembly (4). The transverse moving frame (2) is provided with several transverse moving wheel sets (21) on both sides, and the transverse moving wheel sets (21) are slidably connected to the guide rail (1); The transverse moving frame (2) is provided with a sliding groove (22), and a longitudinal pressure roller assembly (3) is slidably connected in the sliding groove (22). The longitudinal pressure roller assembly (3) includes a longitudinal mounting frame (31), and two lifting cylinders (32) are provided at the bottom of the longitudinal mounting frame (31). Support plates (33) are fixedly connected to the two lifting cylinders (32), and extrusion rollers (34) are rotatably connected to the two support plates (33). The extrusion roller (34) is a stepped extrusion roller, and stepped portions are provided on both sides of the extrusion roller (34); The steel plate support assembly (4) includes a main support platform (41), on which a plurality of hydraulic cylinder support assemblies (42) are provided, and the plurality of hydraulic cylinder support assemblies (42) are arranged in an array on the main support platform (41); The hydraulic cylinder support assembly (42) includes a support cylinder (421), and a hemispherical support block (422) is fixedly connected to the telescopic end of the support cylinder (421). A connecting block (43) is provided on the hemispherical support block (422), and a contact plate (424) is fixedly connected to the connecting block (43). The main support platform (41) has a placement slot (411) on one side of its upper part, and a flip plate assembly (5) is provided on one side of the placement slot (411). The flap assembly (5) includes several flip cylinders (51), which are arranged on one side of the upper part of the main support platform (41). The telescopic ends of the flip cylinders (51) are hinged to flaps (52), and a reinforcing plate (53) is provided on one side of the upper part of the flaps (52).

2. The steel plate flipping and turtle-back defect correction device according to claim 1, characterized in that, Several rubber strips (54) are provided on the upper part of the flap (52) away from the flipping cylinder (51).

Images