High-strength and high-toughness steel rolling device and rolling method thereof

Abstract

The invention discloses a high-strength and high-toughness steel rolling device and a rolling method thereof, and relates to the technical field of high-strength and high-toughness steel processing. The invention aims to solve the technical problems that a vertical adjusting mechanism in existing rolling equipment easily generates rigid yielding under high-load rolling to cause thickness deviation, and a uniform runner structure in a cooling roller cannot be matched with a transverse differential thermal field of a steel plate. According to the technical scheme, a rolling assembly and a limiting assembly are arranged in a fixed support, after the vertical position of a pressing roller is pre-adjusted through a hydraulic cylinder, the end of the pressing roller is mechanically locked through a lateral clamping mechanism linked with an electric push rod and a hydraulic rod, and position adjustment and rolling bearing are separated; a strip-shaped circular groove and threaded hole combined flow channel is formed in a shaping roller in the cooling assembly, and the heat exchange retention time of cooling liquid in the middle of a roller body is physically prolonged by means of the flow resistance difference of fluid in the flow channels with different sections. According to the device, the size retentivity of high-strength steel rolling and the eliminating effect of structural stress are improved.

Description

Technical Field

[0001] This invention relates to the field of high-strength and high-toughness steel technology, and in particular to a high-strength and high-toughness steel rolling apparatus and rolling method thereof. Background Technology

[0002] High-strength and high-toughness steel is widely used in automobile manufacturing, shipbuilding, and other fields due to its excellent mechanical properties. Because high-strength and high-toughness steel has extremely high yield strength and deformation resistance, stringent requirements are placed on the rigidity maintenance capabilities of the equipment during rolling. Existing rolling mills mostly use hydraulic or screw mechanisms to directly control and maintain the vertical position of the pressure rolls. However, under high-load continuous rolling conditions, a single vertical adjustment mechanism must not only perform the gap adjustment function but also act as the main load-bearing component resisting the rolling force. This can easily lead to "elastic yielding" phenomena caused by hydraulic micro-leakage or mechanical clearance, resulting in slight displacement of the pressure rolls during high-frequency vibration. This makes it difficult to maintain the set roll gap accuracy and affects the consistency of the steel plate thickness.

[0003] Furthermore, temperature control and shaping after rolling high-strength and tough steel is crucial for eliminating residual stress. Existing cooling rolls often employ a straight-through or simple sandwich water jacket structure, with the flow rate and heat transfer coefficient of the cooling medium along the roll's axial direction being essentially uniform. However, wide steel plates exhibit a natural transverse temperature gradient after rolling, characterized by rapid heat dissipation at the edges and significant heat accumulation in the center. The uniform heat transfer structure of existing cooling rolls cannot match this non-uniform thermal field, resulting in a relatively slower cooling rate in the center of the steel plate. This leads to residual thermal stress within the plate, causing warping during subsequent processing. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as the vertical adjustment mechanism being prone to elastic micro-displacement under high rolling force during the rolling of high-strength and tough steel, which leads to damage to the thickness accuracy of the finished product, and the inability of the conventional cooling roller's internal equal-section flow channel to perform differentiated heat exchange for the transverse temperature difference of the steel plate, resulting in uneven distribution of internal stress in the plate. Therefore, this invention proposes a high-strength and tough steel rolling device and rolling method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high-strength and high-toughness steel rolling apparatus includes a fixed support; A fixed bracket is fixedly connected to one side of the top of the fixed support; The rolling assembly, located on the fixed support, includes two pressure rollers arranged opposite each other and a hydraulic cylinder that drives the upper pressure roller to rise and fall. The sliding bracket slides in conjunction with the fixed support via a slide rail and slider pair. An electric push rod is fixedly connected to a fixed mounting block on the other side of the fixed support, and its piston rod is connected to the sliding bracket to drive the sliding bracket to move laterally. A limiting component is provided on the sliding bracket for engaging and limiting the end of the pressure roller. Activating the hydraulic cylinder can drive the upper pressure roller to rise and fall, thereby adjusting the distance between the two pressure rollers to adapt to the rolling of steel plates of different thicknesses. Activating the electric push rod can drive the limiting component to engage with the pressure roller, ensuring the rotational stability of the pressure roller.

[0006] In one possible design, the rolling assembly further includes two lower limit seats, two guide rods, and one upper limit seat. The two lower limit seats are symmetrically fixed inside the fixed bracket, and the two guide rods are symmetrically fixed to the top of the lower limit seats. The upper limit seat is slidably sleeved on the outer wall of the corresponding two guide rods. The hydraulic cylinder is fixed to the top of the fixed bracket through a connecting frame, and its piston rod is fixed to the top of the upper limit seat. The two pressure rollers rotatably pass through the two lower limit seats and the two upper limit seats respectively. When the hydraulic cylinder is activated, its piston rod drives the upper limit seat to slide along the outer wall of the guide rod, synchronously driving the upper pressure roller to rise and fall. The guide rod can ensure the stability of the upper limit seat movement.

[0007] In one possible design, the piston rod of the electric push rod is connected to the sliding bracket via a connecting assembly. The connecting assembly includes two fixed rectangular plates, a connecting plate, and a pin. The two fixed rectangular plates are fixedly connected to the bottom of the sliding bracket, the piston rod of the electric push rod is fixedly connected between the two fixed rectangular plates, and the connecting plate is fixedly connected to one side of the fixed bracket. Both the connecting plate and the fixed rectangular plates have insertion holes, and the pin can be inserted into multiple insertion holes. After the electric push rod drives the sliding bracket to its position, the connecting plate is inserted between the two fixed rectangular plates. Inserting the pin into the socket can achieve a fixed connection between the sliding bracket and the fixed bracket, ensuring the stability of the sliding bracket.

[0008] In one possible design, the limiting assembly includes a sliding plate, two mounting sleeves, two rotating plates II, two side mounting seats, two hydraulic rods, and rotating plate I. The sliding plate is slidably connected to the inside of the sliding bracket. The two mounting sleeves are rotatably inserted through the sliding plate and the sliding bracket, respectively. One end of the pressure roller is provided with a plug-in block that mates with the mounting sleeve. The two rotating plates II are symmetrically rotatably connected to the top of the sliding plate. The two side mounting seats are symmetrically fixed to both sides of the sliding bracket. The two hydraulic rods are rotatably connected to the inside of the two side mounting seats, respectively. The rotating plate I is rotatably inserted through the sliding bracket and its middle part is rotatably connected to the sliding bracket. The piston rod of the hydraulic rod is rotatably connected to one end of the rotating plate I, and the other end of the rotating plate I is rotatably connected to one end of the rotating plate II. When the hydraulic rod is activated, its piston rod extends and retracts, causing rotating plate I to rotate. Rotating plate I drives rotating plate II to rotate, which in turn causes the sliding plate and mounting sleeve to move up and down, thereby adjusting the distance between the two mounting sleeves so as to precisely engage with the ends of the pressure rollers with different distances.

[0009] In one possible design, a cooling assembly is also included, located on one side of the fixed bracket. The cooling assembly includes a mounting plate, two L-shaped support plates, two cooling pipes, and two shaping rollers. The two L-shaped support plates are symmetrically fixed to the top two sides of the mounting plate. The two cooling pipes rotatably pass through the interior of the two L-shaped support plates, and the two shaping rollers are fixed between the two cooling pipes. After rolling, the steel plate passes between two shaping rollers for cooling and shaping. The coolant delivered to the cooling pipe can enter the interior of the shaping rollers to cool the steel plate.

[0010] In one possible design, the shaping roller has strip-shaped circular grooves at both ends, which are connected to cooling pipes. Circular grooves are connected on both sides of the strip-shaped circular grooves. The shaping roller has threaded holes inside, with each end of the threaded hole connected to one of the two circular grooves. The coolant enters the strip-shaped circular groove through the cooling pipe, and flows into the threaded hole through the circular groove, which can prolong the residence time of the coolant in the middle of the shaping roller, increase the heat exchange area, and automatically balance the temperature field of "hot in the middle and cold on both sides" after the high-strength steel is rolled, without the need for sensor feedback adjustment.

[0011] In one possible design, the mounting plate has multiple slotted holes, and the fixing bracket has multiple positioning screws threaded to one side, with the positioning screws passing through the slotted holes. Loosening the positioning screws allows for adjustment of the vertical position of the mounting plate. The mounting plate, via an L-shaped support plate, drives the upper shaping roller to rise and fall, thereby adjusting the distance between the two shaping rollers to accommodate steel plates of different thicknesses. Tightening the positioning screws locks the mounting plate in place.

[0012] In one possible design, it also includes two upper mounting plates, two lower mounting plates, two rotating screws, and two fixing nuts. The two lower mounting plates are symmetrically fixed to both sides of the fixed bracket. The two rotating screws are rotatably connected to the top of the two lower mounting plates respectively. The two upper mounting plates are symmetrically fixed to both sides of the upper limit seat. The upper mounting plates have holes on their sides that mate with the rotating screws. The two fixing nuts are threaded onto the top of the two rotating screws respectively. After the distance between the two pressure rollers is adjusted to the correct position, rotate the rotating screw to insert it into the hole of the upper mounting plate, and tighten the fixing nut to achieve a fixed connection between the upper mounting plate and the lower mounting plate, further improving the stability of the upper limit seat and preventing the upper limit seat from shaking when the pressure rollers are working.

[0013] A method for rolling high-strength and high-toughness steel, using the aforementioned high-strength and high-toughness steel rolling apparatus, includes the following steps: S1. Start the hydraulic cylinder to adjust the distance between the two pressure rollers, start the hydraulic rod to adjust the distance between the two mounting sleeves, start the electric push rod to drive the sliding bracket to move, so that the mounting sleeve engages with the end of the pressure roller, and insert the pin to fix the sliding bracket. S2. Loosen the positioning screws to adjust the distance between the two shaping rollers, and tighten the positioning screws to fix the horizontal plate. S3. Pass the heated steel plate through the two pressure rollers, and start the motor connected to the pressure rollers to drive the pressure rollers to rotate and roll the steel plate. S4. After rolling, the steel plate passes between two shaping rollers, and coolant is delivered to the cooling pipe to cool and shape the steel plate.

[0014] In this application, during use, the heated steel plate passes between two pressure rollers. One end of the pressure rollers is connected to an external motor via a coupling, which can press the steel plate. After rolling, it passes between two shaping rollers for cooling and shaping to ensure the stability of the steel plate's shape. Furthermore, by activating the hydraulic cylinder, the piston rod of the hydraulic cylinder drives the upper limit seat to move upward, and the upper limit seat drives the pressure roller above to move upward. The upper limit seat slides on the outer wall of the guide rod to ensure the stability of the upper limit seat's upward movement. In this way, the distance between the two pressure rollers can be adjusted to accommodate steel plates of various sizes. Furthermore, by activating the hydraulic rod, the piston rod of the hydraulic rod extends or retracts, thereby driving the rotating plate I to rotate. The other end of the rotating plate I drives the rotating plate II to rotate, and the rotating plate II drives the sliding plate to move up and down. The sliding plate drives the mounting sleeve to move up and down, thereby adjusting the distance between the two mounting sleeves. In conjunction with the start of the electric push rod, the piston rod of the electric push rod drives the sliding bracket to move laterally. The sliding bracket drives the two mounting sleeves to move laterally, so that the mounting sleeves can engage with one end of the pressure roller to ensure the stability of the pressure roller rotation. After the sliding bracket moves into place, the connecting plate is inserted between the two fixed rectangular plates. At this time, the pin is inserted into the inside of the fixed rectangular plate and the connecting plate to connect the sliding bracket and the fixed bracket to ensure its stability. Furthermore, the distance between the two shaping rollers can be adjusted to match the size of the steel plate. The lower shaping roller is fixedly set, and the position of the mounting plate can be adjusted up and down. By loosening the positioning screws, the position of the mounting plate can be adjusted. Due to the setting of the slotted hole, the positioning screws can be tightened to lock the mounting plate again. The mounting plate drives the upper shaping roller to move up and down through the L-shaped support plate, thereby adapting to the size of the steel plate. Furthermore, as the steel plate passes through the two shaping rollers, coolant can be delivered into the cooling pipe. After the coolant enters the circular groove through the strip groove, it then passes through the threaded hole and surrounds the roller. The physical structure forces the fluid to stay in the middle of the roller for a longer time and a larger heat exchange area, thereby automatically balancing the temperature field of "hot in the middle and cold on both sides" during the rolling of high-strength steel without the need for sensor feedback adjustment.

[0015] Beneficial Effects: This application achieves mechanical separation of the pressure roll position adjustment and rolling bearing functions through a lateral limiting component. After the hydraulic cylinder completes the preset adjustment of the vertical spacing of the pressure rolls, the electric push rod and hydraulic rod are activated to drive the mounting sleeve to achieve lateral rigid engagement with the end of the pressure roll. During the rolling process, this lateral engagement structure serves as the main rigid support point, effectively distributing the reaction force on the vertical adjustment mechanism and preventing elastic retreat or micro-vibration of the adjustment mechanism under high rolling resistance, thereby significantly improving the thickness accuracy and surface flatness of the high-strength and tough steel finished product.

[0016] The cooling assembly of this application employs a variable cross-section flow channel design to achieve passive differential heat dissipation. The coolant enters the circular groove through a strip-shaped groove, and then flows around the threaded hole. This physical structure alters the fluid's hydrodynamic characteristics within the roller body. The threaded hole structure increases the flow resistance and flow length of the fluid in the middle of the shaping roller, resulting in a relatively longer residence time of the coolant in the heat-concentrated central region of the roller body, increasing the heat exchange area. Thus, without the need for external sensor intervention, the physical structure automatically balances the temperature field of the steel plate, which is "hot in the middle and cold at both sides," effectively reducing residual thermal stress within the steel plate.

[0017] The cooling assembly of this application adjusts the position of the mounting plate by loosening or tightening the positioning screws and using the guiding effect of the strip hole. The mounting plate drives the upper shaping roller to move up and down through the L-shaped support plate, so as to flexibly adjust the distance between the two shaping rollers, adapt to the cooling requirements of steel plates of different thicknesses, and ensure the fit and cooling uniformity of the steel plate during the cooling process.

[0018] The cooling assembly of this application delivers coolant to the cooling pipe. The coolant enters the circular groove through the strip-shaped groove and then flows around through the threaded hole. By using physical structure, the residence time of the coolant in the middle of the shaping roll is extended, the heat exchange area is increased, and the temperature field of the high-strength and tough steel after rolling is automatically balanced, which is hot in the middle and cold on both sides. No sensor feedback adjustment is required, which simplifies the device structure, reduces production costs and maintenance difficulty, and at the same time ensures the uniformity of steel plate cooling, thereby improving the dimensional stability and mechanical properties of the steel plate.

[0019] The rolling device of this application integrates rolling, limiting and cooling functions. All components work together in a coordinated manner, making it easy to operate and enabling continuous production of high-strength and tough steel, thereby improving overall production efficiency and product quality. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a high-strength and tough steel rolling device proposed in this invention. Figure 2 This is a three-dimensional view from a second perspective of a high-strength and high-toughness steel rolling device proposed in this invention. Figure 3 This is an exploded view of the sliding support and fixed support in a high-strength and tough steel rolling device proposed in this invention; Figure 4 This is a three-dimensional view of the sliding support in a high-strength and tough steel rolling device proposed in this invention. Figure 5 This is a three-dimensional view of the lower limit seat and the upper limit seat in a high-strength and tough steel rolling device proposed in this invention; Figure 6 This is a three-dimensional view of the shaping roll and fixed support in a high-strength and tough steel rolling device proposed in this invention; Figure 7 This is a three-dimensional sectional view of the shaping roll in a high-strength and tough steel rolling device proposed in this invention.

[0021] In the diagram: 1. Fixed support; 2. Fixed mounting block; 3. Electric push rod; 4. Sliding bracket; 5. Hydraulic cylinder; 6. Pressure roller; 7. Upper mounting plate; 8. Shaping roller; 9. Fixed bracket; 10. Fixed rectangular plate; 11. Mounting sleeve; 12. Rotating plate I; 13. Rotating plate II; 14. Hydraulic rod; 15. Side mounting seat; 16. Pin; 17. Sliding plate; 18. Upper limit seat; 19. Guide rod; 20. Lower limit seat; 21. Fixing nut; 22. Rotating screw; 23. L-shaped support plate; 24. Lower mounting plate; 25. Positioning screw; 26. Mounting cross plate; 27. Strip hole; 28. Connecting plate; 29. ​​Cooling pipe; 30. Strip circular groove; 31. Threaded hole; 32. Circular groove. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] In one embodiment: Refer to Figure 1-7The rolling device includes a fixed support 1, which serves as the load-bearing foundation of the entire device. A fixed bracket 9 is fixedly installed on one side of its top, and a fixed mounting block 2 is fixedly installed on the other side of its top. Meanwhile, a sliding bracket 4 is slidably connected to the top of the fixed support 1 through a slide rail and a slider. In order to achieve stable lateral movement of the sliding bracket 4, an electric push rod 3 is fixedly installed inside the fixed mounting block 2. The piston rod of the electric push rod 3 is connected to the sliding bracket 4 through a connecting assembly and is used to push the sliding bracket 4 to move laterally. Specifically, the connecting assembly includes two fixed rectangular plates 10 fixedly installed at the bottom of the sliding bracket 4. The piston rod of the electric push rod 3 is fixedly connected between the two fixed rectangular plates 10. A connecting plate 28 is fixedly installed on one side of the fixed bracket 9. Both the connecting plate 28 and the fixed rectangular plates 10 have insertion holes. The same pin 16 can be inserted into the multiple insertion holes. When the electric push rod 3 drives the sliding bracket 4 to move to the designated position, the connecting plate 28 will be inserted between the two fixed rectangular plates 10. At this time, the pin 16 is inserted into the corresponding insertion hole, so that the sliding bracket 4 and the fixed bracket 9 can be stably connected, and the sliding bracket 4 can be prevented from shifting in subsequent operations. The top of the fixed bracket 9 is provided with a rolling assembly for rolling the steel plate. Further, the rolling assembly includes two symmetrically arranged lower limit seats 20 fixedly installed inside the fixed bracket 9. Two symmetrically arranged guide rods 19 are fixedly installed on the top of the lower limit seats 20. The outer walls of the corresponding two guide rods 19 are slidably sleeved with the same upper limit seat 18. The top of the fixed bracket 9 is fixedly connected to a hydraulic cylinder 5 through a connecting frame. The piston rod of the hydraulic cylinder 5 is fixedly connected to the top of the upper limit seat 18. Pressure rollers 6 rotatably pass through the two lower limit seats 20 and the two upper limit seats 18. Preferably, the pressure rollers 6 are made of alloy structural steel to ensure that they have sufficient strength and wear resistance. Based on this, when the hydraulic cylinder 5 is started, the piston rod of the hydraulic cylinder 5 will drive the upper limit seat 18 to slide up and down along the outer wall of the guide rod 19, completing the pre-adjustment of the vertical spacing of the pressure rollers 6. The guide rod 19 can ensure the stability of the upper limit seat 18 during the movement. When the upper limit seat 18 moves, it will drive the upper pressure roller 6 to move up and down simultaneously, thereby realizing the adjustment of the spacing between the two pressure rollers 6 to adapt to the rolling requirements of steel plates of different thicknesses. After the spacing between the two pressure rollers 6 is adjusted to the correct position, the heated steel plate is passed through the space between the two pressure rollers 6. One end of the pressure roller 6 is connected to an external motor through a coupling. After the motor is started, it drives the pressure roller 6 to rotate, thus pressing the steel plate. The sliding bracket 4 is internally provided with a limiting component for limiting the position of the two pressure rollers 6. Further, the limiting component includes a sliding plate 17 slidably connected inside the sliding bracket 4. An installation sleeve 11 is rotatably connected inside both the sliding plate 17 and the sliding bracket 4. One end of the pressure roller 6 is fixedly installed with an insertion block that cooperates with the installation sleeve 11. The top of the sliding plate 17 is rotatably connected with two symmetrically arranged rotating plates II 13. Side mounting seats 15 are fixedly installed on both sides of the sliding bracket 4. A hydraulic rod 14 is rotatably connected inside the side mounting seat 15. A rotating plate I 12 is rotatably connected inside the sliding bracket 4. The middle position of the rotating plate I 12 is rotatably connected to the sliding bracket 4. The piston rod of the hydraulic rod 14 is rotatably connected to one end of the rotating plate I 12, and the other end of the rotating plate I 12 is rotatably connected to one end of the rotating plate II 13. When the hydraulic rod 14 is activated, the piston rod of the hydraulic rod 14 extends or retracts, which drives the rotating plate I 12 to rotate around its central rotation point. When the rotating plate I 12 rotates, it drives the rotating plate II 13 to rotate. The rotating plate II 13 then drives the sliding plate 17 to move up and down inside the sliding bracket 4. When the sliding plate 17 moves, it simultaneously drives the mounting sleeve 11 to move up and down, thereby adjusting the distance between the two mounting sleeves 11. After the adjustment is completed, the electric push rod 3 is activated. The electric push rod 3 drives the sliding bracket 4 to move laterally. The sliding bracket 4 then drives the two mounting sleeves 11 to move laterally, so that the mounting sleeve 11 is precisely engaged with the insertion block at one end of the pressure roller 6. At this time, the mounting sleeve 11 forms a lateral rigid lock on the pressure roller 6, restricting the pressure roller 6 to the preset working position. This prevents the hydraulic cylinder 5 from being subjected to excessive force and causing slight retraction when the pressure roller 6 generates a huge reaction force during the rolling of high-strength steel. This ensures the absolute stability of the roll gap size during the rolling process, thereby ensuring the stability of the pressure roller 6 during rotation and preventing the pressure roller 6 from axially shifting. A cooling assembly for cooling the steel plate is provided on one side of the fixed bracket 9. Further, the cooling assembly includes a mounting plate 26. L-shaped support plates 23 are fixedly installed on both sides of the top of the mounting plate 26. Cooling pipes 29 are rotatably passed through the interior of the L-shaped support plates 23. A shaping roller 8 is fixedly installed between the two cooling pipes 29. Both ends of the shaping roller 8 are provided with strip-shaped circular grooves 30, which are connected to the cooling pipes 29. Both sides of the strip-shaped circular grooves 30 are provided with connected circular grooves 32. The interior of the shaping roller 8 is provided with threaded holes 31, and both ends of the threaded holes 31 are connected to the two circular grooves 32 respectively. Preferably, the cooling pipes 29 are made of stainless steel, which has good corrosion resistance and thermal conductivity.The mounting plate 26 has multiple slotted holes 27 inside. One side of the fixing bracket 9 is threaded with multiple positioning screws 25. The positioning screws 25 pass through the slotted holes 27 and are used to brake the mounting plate 26. Based on this, the distance between the two shaping rollers 8 can be changed by adjusting the position of the mounting plate 26 to adapt to the cooling requirements of steel plates of different thicknesses. In specific operation, loosen the positioning screws 25 and use the guiding effect of the slotted holes 27 to adjust the vertical position of the mounting plate 26. The mounting plate 26 drives the upper shaping roller 8 to move up and down synchronously through the L-shaped support plate 23. After adjustment, tighten the positioning screws 25 to lock and fix the mounting plate 26, while the lower shaping roller 8 remains fixed. After the steel plate is rolled by two pressure rollers 6, it passes between two shaping rollers 8 for cooling and shaping. At this time, coolant is delivered into the cooling pipe 29. The coolant enters the circular groove 32 through the strip groove 30 and then flows around through the threaded hole 31. This physical structure forces the fluid to stay in the middle of the shaping roller 8 for a longer time and a larger heat exchange area. This automatically balances the temperature field of the high-strength steel rolling process, which is hot in the middle and cold on both sides, without the need for sensor feedback adjustment. This ensures the uniformity of steel plate cooling while improving the stability of the steel plate shape.

[0024] Once the sliding bracket 4 is in place and fixed by the pin 16, the piston rod of the electric push rod 3 can be separated from the fixed rectangular plate 10, thus preventing the electric push rod 3 from being subjected to long-term stress.

[0025] This application can be used in the field of high-strength and high-toughness steel, as well as in other fields applicable to this application.

[0026] In another embodiment: Reference Figure 1-7 A high-strength and high-toughness steel rolling device is used in the field of high-strength and high-toughness steel. The structure of this embodiment is basically the same as that of the previous embodiment, except that: further, two symmetrically arranged lower mounting plates 24 are fixedly installed on both sides of the fixed bracket 9. The top of the lower mounting plate 24 is rotatably connected to a rotating screw 22. The upper mounting plate 7 is fixedly installed on both sides of the upper mounting plate 7. The side of the upper mounting plate 7 is provided with a hole for cooperating with the rotating screw 22. The top of the rotating screw 22 is threaded with a fixing nut 21. After the distance between the two pressure rollers 6 is adjusted to the correct position, the rotating screw 22 is rotated to insert into the hole of the upper mounting plate 7, and then the fixing nut 21 is tightened. This achieves the fixed connection between the upper mounting plate 7 and the lower mounting plate 24, further improving the stability of the upper mounting plate 18, preventing the upper mounting plate 18 from shaking during the operation of the pressure rollers 6, and ensuring rolling accuracy. Based on this, the various components of this device work together to achieve continuous rolling and cooling shaping of high-strength and tough steel. The entire process is easy to operate and does not require frequent shutdowns to replace parts, which can effectively improve production efficiency. At the same time, through multiple limiting structures and optimized cooling structures, the rolling accuracy and cooling effect of the steel plate can be guaranteed, thereby improving product quality.

[0027] It also includes a controller (such as a PLC controller), which is electrically connected to the hydraulic cylinder 5, hydraulic rod 14, electric push rod 3 and the motor driving the pressure roller 6, respectively. The controller is used to control the extension and retraction of the hydraulic cylinder 5 to adjust the spacing of the pressure roller 6, control the extension and retraction of the hydraulic rod 14 to adjust the spacing of the mounting sleeve 11, control the extension and retraction of the electric push rod 3 to drive the sliding bracket 4 to move, and control the start and stop of the motor to drive the pressure roller 6 to rotate, so as to realize the coordinated action of each component.

[0028] During long-term use, this device requires regular cleaning and lubrication of the sliding rail slider pair, the mating surfaces of the guide rod 19 and the upper limit seat 18, the mating surfaces of the sliding plate 17 and the sliding bracket 4, and the rotating mating surfaces of the pressure roller 6 and the limit seat, in order to ensure the smooth operation of each component.

[0029] However, as is well known to those skilled in the art, the working principles and wiring methods of the hydraulic cylinder 5, hydraulic rod 14 and electric push rod 3 are all conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-strength and high-toughness steel rolling apparatus, characterized in that, include: Fixed support (1); A fixed bracket (9) is fixed to one side of the top of the fixed support (1); The rolling assembly, located on the fixed support (9), includes two pressure rollers (6) arranged opposite each other and a hydraulic cylinder (5) for driving the upper pressure roller (6) to rise and fall. The sliding bracket (4) slides in conjunction with the fixed support (1) via a slide rail slider pair; An electric push rod (3) is fixedly connected to a fixed mounting block (2) on the other side of the fixed support (1), and its piston rod is connected to the sliding bracket (4) to drive the sliding bracket (4) to move laterally; A limiting component is provided on the sliding bracket (4) for engaging and limiting the end of the pressure roller (6). Activating the hydraulic cylinder (5) can drive the upper pressure roller (6) to rise and fall.

2. The high-strength and high-toughness steel rolling apparatus according to claim 1, characterized in that, The rolling assembly also includes two lower limit seats (20), two guide rods (19) and one upper limit seat (18). The two lower limit seats (20) are symmetrically fixed inside the fixed bracket (9). The two guide rods (19) are symmetrically fixed to the top of the lower limit seats (20). The upper limit seat (18) is slidably sleeved on the outer wall of the corresponding two guide rods (19). The hydraulic cylinder (5) is fixed to the top of the fixed bracket (9) through a connecting frame. Its piston rod is fixed to the top of the upper limit seat (18). The two pressure rollers (6) rotate through the two lower limit seats (20) and the two upper limit seats (18) respectively.

3. The high-strength and high-toughness steel rolling apparatus according to claim 1, characterized in that, The piston rod of the electric push rod (3) is connected to the sliding bracket (4) through a connecting assembly. The connecting assembly includes two fixed rectangular plates (10), a connecting plate (28), and a pin (16). The two fixed rectangular plates (10) are fixed to the bottom of the sliding bracket (4). The piston rod of the electric push rod (3) is fixed between the two fixed rectangular plates (10). The connecting plate (28) is fixed to one side of the fixed bracket (9). Both the connecting plate (28) and the fixed rectangular plates (10) are provided with insertion holes. The pin (16) can be inserted into multiple insertion holes.

4. The high-strength and high-toughness steel rolling apparatus according to claim 1, characterized in that, The limiting assembly includes a sliding plate (17), two mounting sleeves (11), two rotating plates II (13), two side mounting seats (15), two hydraulic rods (14), and rotating plate I (12). The sliding plate (17) is slidably connected to the interior of the sliding bracket (4). The two mounting sleeves (11) are respectively rotatably inserted through the interior of the sliding plate (17) and the sliding bracket (4). One end of the pressure roller (6) is provided with a plug-in block that mates with the mounting sleeve (11). The two rotating plates II (13) rotate symmetrically. The sliding plate (17) is flexibly connected to the top of the sliding plate (17). The two side mounting seats (15) are symmetrically fixed to both sides of the sliding bracket (4). The two hydraulic rods (14) are rotatably connected to the inside of the two side mounting seats (15). The rotating plate I (12) rotatably passes through the sliding bracket (4) and its middle part is rotatably connected to the sliding bracket (4). The piston rod of the hydraulic rod (14) is rotatably connected to one end of the rotating plate I (12). The other end of the rotating plate I (12) is rotatably connected to one end of the rotating plate II (13). When the hydraulic rod (14) is activated, its piston rod extends and retracts, causing the rotating plate I (12) to rotate. The rotating plate I (12) drives the rotating plate II (13) to rotate, thereby causing the sliding plate (17) and the mounting sleeve (11) to move up and down.

5. The high-strength and high-toughness steel rolling apparatus according to claim 1, characterized in that, It also includes a cooling assembly located on one side of the fixed bracket (9). The cooling assembly includes a mounting plate (26), two L-shaped support plates (23), two cooling pipes (29), and two shaping rollers (8). The two L-shaped support plates (23) are symmetrically fixed to the top two sides of the mounting plate (26). The two cooling pipes (29) are respectively rotatably passed through the interior of the two L-shaped support plates (23). The two shaping rollers (8) are respectively fixed between the two cooling pipes (29). The rolled steel plate is cooled and shaped between two shaping rollers (8), and the coolant delivered to the cooling pipe (29) can enter the interior of the shaping rollers (8).

6. The high-strength and high-toughness steel rolling apparatus according to claim 5, characterized in that, The shaping roller (8) has strip-shaped circular grooves (30) at both ends, which are connected to the cooling pipe (29). The strip-shaped circular grooves (30) have circular grooves (32) connected on both sides. The shaping roller (8) has a threaded hole (31) inside, which is connected to two circular grooves (32) at both ends. The coolant enters the strip-shaped circular groove (30) through the cooling pipe (29), flows into the threaded hole (31) through the circular groove (32) and flows around.

7. The high-strength and high-toughness steel rolling apparatus according to claim 5, characterized in that, The mounting plate (26) has multiple slotted holes (27), and the fixing bracket (9) has multiple positioning screws (25) threaded on one side. The positioning screws (25) pass through the slotted holes (27). Loosening the positioning screw (25) can adjust the up and down position of the mounting plate (26). The mounting plate (26) drives the upper shaping roller (8) to rise and fall through the L-shaped support plate (23).

8. The high-strength and high-toughness steel rolling apparatus according to claim 2, characterized in that, It also includes two upper mounting plates (7), two lower mounting plates (24), two rotating screws (22) and two fixing nuts (21). The two lower mounting plates (24) are symmetrically fixed to both sides of the fixed bracket (9). The two rotating screws (22) are respectively rotatably connected to the top of the two lower mounting plates (24). The two upper mounting plates (7) are symmetrically fixed to both sides of the upper limit seat (18). The upper mounting plates (7) have holes on their sides that cooperate with the rotating screws (22). The two fixing nuts (21) are respectively threaded onto the top of the two rotating screws (22).

9. A method for rolling high-strength and high-toughness steel, characterized in that, The high-strength and high-toughness steel rolling apparatus according to any one of claims 1 to 8 includes the following steps: S1. Start the hydraulic cylinder (5) to adjust the distance between the two pressure rollers (6), start the hydraulic rod (14) to adjust the distance between the two mounting sleeves (11), start the electric push rod (3) to drive the sliding bracket (4) to move, so that the mounting sleeve (11) engages with the end of the pressure roller (6), and insert the pin (16) to fix the sliding bracket (4). S2. Loosen the positioning screw (25) to adjust the distance between the two shaping rollers (8), and tighten the positioning screw (25) to fix the horizontal plate (26). S3. Pass the heated steel plate through the two pressure rollers (6), and start the motor connected to the pressure rollers (6) to drive the pressure rollers (6) to rotate and roll the steel plate; S4. After rolling, the steel plate passes between two shaping rollers (8) and coolant is delivered to the cooling pipe (29) to cool and shape the steel plate.

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