Die steel hot rolling device

Abstract

The invention relates to the technical field of die steel production, and particularly discloses a die steel hot rolling device which comprises a rack, a hot roller, a conveying roller, an extrusion assembly, a lifting mechanism and a dephosphorization mechanism. The lifting mechanism comprises a plurality of supporting plates and a second driving part, and the multiple supporting plates are arranged at intervals in the length direction of the rack; each supporting plate is located in a gap between every two adjacent conveying rollers, the dephosphorization mechanism comprises a polishing assembly and a spraying and removing assembly, the polishing assembly comprises two polishing rollers, the spraying and removing assembly comprises a water supply pipe, a plurality of dephosphorization nozzles and a driving structure, and the multiple dephosphorization nozzles are arranged at intervals in the length direction of the rack; an electromagnetic valve is arranged between each dephosphorization spray head and the water supply pipe, and the driving structure can drive the dephosphorization spray heads with the matched number to be opened according to the length of the die steel; the method can ensure the quality and deformation uniformity of the die steel, improves the dephosphorization effect, and effectively solves the problem that the quality of the die steel is affected due to the fact that oxide skin is not cleaned thoroughly.

Description

Technical Field

[0001] The present invention relates to the technical field of die steel production, and particularly relates to a hot rolling device for die steel. Background Art

[0002] Die steel is a type of steel used to manufacture dies such as cold stamping dies, hot forging dies, and die casting dies. Die steel can be roughly divided into three categories: cold rolling die steel, hot rolling die steel, and plastic die steel. Hot rolling is a rolling process carried out above the recrystallization temperature of the metal. Among them, rolling is a pressure processing method in which a metal billet passes through the gap between a pair of rotating rolls, and the cross-section of the material is reduced and the length is increased due to the compression of the rolls.

[0003] The patent document with the publication number CN221790556U discloses a hot rolling device for die steel, which includes a bottom plate. A fixed shell is fixedly connected to the top of the bottom plate. One side of the top of the fixed shell is fixedly connected to a fixed plate. A fitting plate is fixedly connected to the bottom of the fixed plate. A plurality of rotating rods are arranged inside the fixed shell. Transmission rollers are fixedly connected to the outside of the plurality of rotating rods. A motor is fixedly connected to one side of the outside of the fixed shell. A movable rod is fixedly connected to the output shaft of the motor. Guide blocks are fixedly connected to both sides of the outside of the movable rod. The fixed shell is movably connected to a lower pressing plate through a rotating shaft. Elastic springs are fixedly connected to both sides of the bottom of the lower pressing plate. When in use, the lower pressing plate will collide with the fixed column, and reciprocate like this, so that the scale on the top of the lower pressing plate can be shaken off and peeled off, which is convenient for collecting the scale, and at the same time, the scale adhered to the transmission rollers can be cleaned.

[0004] In the hot rolling device in the related art, after the first hot rolling of the die steel is completed, it is usually necessary to perform extrusion correction on the die steel and then carry out the next hot rolling. However, during the correction, there may be a situation where the scale on the surface of the die steel is not completely cleaned, resulting in defects such as pitting and pits on the surface of the die steel after extrusion. In addition, when correcting, the die steel is usually placed on the transmission rollers, and the corners of the die steel may not be extruded, resulting in uneven internal stress distribution of the die steel and bending, which affects the quality of the die steel. Summary of the Invention

[0005] The present invention provides a hot rolling device for die steel, aiming to solve the problems in the hot rolling device in the related art that when correcting the die steel, the scale on the surface of the die steel is not completely cleaned, resulting in defects such as pitting and pits on the surface of the die steel after extrusion. In addition, during the correction, the corners of the die steel may not be extruded, resulting in uneven internal stress distribution of the die steel and bending, which affects the quality of the die steel.

[0006] A die steel hot rolling device of the present invention comprises a frame, a hot rolling roller is arranged at one end of the frame, a plurality of conveying rollers are rotatably arranged on the frame, extrusion assemblies are arranged on both sides of the frame, the extrusion assemblies comprise an extrusion block and a driving member 1, the driving member 1 is used to drive the extrusion block to move along the width direction of the frame, and also comprises a lifting mechanism and a dephosphorization mechanism; The lifting mechanism includes a plurality of support plates and a second driving member, wherein the plurality of support plates are arranged at intervals along the length direction of the frame, and each support plate is located in the gap between two adjacent conveying rollers, and the second driving member is used to drive the plurality of support plates to move up and down synchronously; The dephosphorization mechanism includes a grinding component and a spraying component. The grinding component includes two grinding rollers, and the two grinding rollers are rotatably installed on the side of the two extrusion blocks close to each other. The spraying component is set into two groups and is correspondingly arranged on the two extrusion blocks. Each group of spraying components includes a water supply pipe, a plurality of dephosphorization nozzles and a driving structure. The plurality of dephosphorization nozzles are arranged at intervals along the length direction of the frame. An electromagnetic valve is provided between each dephosphorization nozzle and the water supply pipe. The driving structure can drive an appropriate number of dephosphorization nozzles to open according to the length of the mold steel.

[0007] Before the extrusion operation, the mold steel can be lifted by the lifting mechanism to separate it from the surface of the conveyor roller, so as to avoid wear on the conveyor roller during the extrusion process and ensure the quality and deformation uniformity of the mold steel; in the process of lifting the mold steel, the oxide scale on the surface of the mold steel can be initially removed by the rotation of the grinding roller, and then the oxide scale can be further removed by the high-pressure water sprayed from the descaling nozzle to improve the dephosphorization effect, and the appropriate number of dephosphorization nozzles can be automatically selected according to the length of the mold steel to ensure that the spray range of the high-pressure water can perfectly cover the length of the mold steel and avoid waste of resources.

[0008] Preferably, the lifting mechanism further comprises a plurality of lifting plates, each of which is longitudinally slidably disposed in a gap between two adjacent conveying rollers, and the plurality of lifting plates are fixedly connected to each other, and each support plate is connected to the upper end of the corresponding lifting plate.

[0009] Preferably, the lifting mechanism is provided with a cleaning component for cleaning the conveying roller. The cleaning components are arranged in two groups and are symmetrically arranged on both sides of the lifting plate. Each group of cleaning components includes an air supply pipe and multiple branch pipes. Each branch pipe is arranged in an L shape. The longitudinally arranged end of the branch pipe is fixed on the corresponding lifting plate and communicated with the air supply pipe. The horizontally arranged end of the branch pipe is fixed on the lower end of the corresponding support plate and is provided with a nozzle. The effect is that during the descent of the mold steel, high-pressure gas can be sprayed onto the surface of the conveying roller, and the oxide scale on the conveying roller can be removed by the impact force of the gas, thereby ensuring the cleanliness of the conveying roller.

[0010] Preferably, two mounting plates are rotatably provided below the support plate, and the two mounting plates are symmetrically arranged on both sides of the lifting plate. The side of each mounting plate facing the lifting plate is rotatably connected to the support plate through a torsion spring, and an elastic member 1 is provided between the other side of each mounting plate and the frame. The branch pipe is prepared and formed by a flexible material. The effect is that, through the cooperation of the torsion spring and the elastic member 1, the nozzle of the branch pipe can automatically adjust the angle to adapt to the movement of the lifting mechanism, thereby ensuring the cleaning effect of the conveying roller.

[0011] Preferably, the driving structure includes a plurality of L-shaped contact plates, which are arranged in parallel along the length direction of the frame and are respectively arranged corresponding to a plurality of dephosphorization nozzles. Each L-shaped contact plate is longitudinally slidably matched with the extrusion block, and an elastic member is provided between the extrusion block and the L-shaped contact plate for driving the L-shaped contact plate to reset. Each L-shaped contact plate includes a vertical plate and a horizontal plate, the vertical plate is longitudinally arranged on the opposite side of the two extrusion blocks, the horizontal plate is horizontally arranged at the upper end of the corresponding extrusion block, and a touch switch is provided between the extrusion block and the extrusion block, and the touch switch is connected to the electric control structure for controlling the opening and closing of the electromagnetic valve.

[0012] Preferably, the distance between the vertical plates in the two groups of L-shaped contact plates is smaller than the distance between the two grinding rollers, and the distance between the two grinding rollers is smaller than the distance between the two extrusion blocks.

[0013] Preferably, the dephosphorization nozzle is located between the corresponding vertical plate and the extrusion block. The effect is that it can form a barrier at the upper end of the mold steel through the contact between the vertical plate and the mold steel, intercept the detached oxide scale, and effectively prevent the oxide scale from flying.

[0014] Preferably, the dephosphorization nozzle is arranged obliquely downward in a direction away from the extrusion block, which has the effect of improving the dephosphorization effect and ensuring that the high-pressure water flow directly impacts the oxide scale on the surface of the mold steel and washes it off.

[0015] Preferably, the outside of the grinding roller is provided with bristles for removing oxide scale, and the bristles are spirally installed on the outside of the grinding roller. The effect is that the contact area and contact time between the bristles and the surface of the mold steel can be increased, thereby improving the dephosphorization effect, and the detached oxide scale can be guided to avoid the accumulation of oxide scale on the mold steel, further reducing the problem of flying oxide scale.

[0016] Preferably, the dephosphorization nozzle is provided with a fan-shaped nozzle.

[0017] The beneficial effects of the present invention are: 1. The present invention is provided with a lifting mechanism, which can lift the mold steel through the lifting mechanism before the extrusion operation to make it separate from the surface of the conveying roller, thereby avoiding wear on the conveying roller during the extrusion process. At the same time, it can extrude various parts of the mold steel more evenly to ensure the quality and deformation uniformity of the mold steel.

[0018] 2. The present invention is provided with a dephosphorization mechanism. During the lifting process of the die steel, the rotating grinding roller can initially remove the scale on the surface of the die steel, and then the high-pressure water sprayed by the descaling nozzle can further remove the scale, improving the dephosphorization effect. Moreover, during this process, by setting a driving structure, the appropriate number of descaling nozzles can be automatically selected and opened according to the length of the die steel to ensure that the spraying range of the high-pressure water can perfectly cover the length of the die steel, avoiding waste of resources.

[0019] 3. The present invention is provided with a cleaning assembly. During the descending process of the die steel, the high-pressure gas can be sprayed onto the surface of the conveyor roller through the branch pipe, and the impact force of the gas is used to remove the scale and other impurities on the conveyor roller, ensuring the cleanliness of the conveyor roller. Moreover, the nozzle of the branch pipe can automatically adjust the angle to adapt to the movement of the lifting mechanism, ensuring the cleaning effect on the conveyor roller. Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram of the present invention.

[0021] Figure 2 is the structural schematic diagram of the present invention cut along the longitudinal direction.

[0022] Figure 3 is the schematic diagram of the state of the die steel before lifting in the present invention.

[0023] Figure 4 is the Figure 3 enlarged structural schematic diagram of part A in the present invention.

[0024] Figure 5 is the schematic diagram of the die steel in the extrusion state in the present invention.

[0025] Figure 6 is the Figure 5 enlarged structural schematic diagram of part B in the present invention.

[0026] Figure 7 is the structural schematic diagram of the cleaning assembly of the present invention.

[0027] Reference Signs: 1. Frame; 11. Hot rolling roller; 12. Conveyor roller; 13. Extrusion block; 131. Extrusion part; 14. Driving part one; 21. Support plate; 22. Driving part two; 23. Lifting plate; 24. Air supply pipe; 25. Branch pipe; 26. Mounting plate; 27. Elastic part one; 31. Grinding roller; 32. Brush hair; 33. Driving part three; 41. Water supply pipe; 42. Descaling nozzle; 43. L-shaped contact plate; 431. Vertical plate; 432. Horizontal plate; 44. Elastic part two; 5. Die steel. Detailed Embodiments

[0028] Embodiments of the present invention will be described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0029] As Figures 1 to 7 shown, a hot rolling device for die steel of the present invention includes a frame 1, hot rolling rollers 11, conveying rollers 12, an extrusion assembly, a lifting mechanism, and a descaling mechanism.

[0030] For the sake of easy understanding, in this embodiment, the length direction of the frame 1 is defined as the front-back direction, and the width direction of the frame 1 is defined as the left-right direction.

[0031] The hot rolling rollers 11 are arranged at the front end of the frame 1 and are used for rolling the die steel 5 to make it reach the required thickness and shape. A plurality of conveying rollers 12 are provided, and the plurality of conveying rollers 12 are arranged at intervals in the front-back direction, and each conveying roller 12 is rotatably arranged on the frame 1 in the left-right direction and is used for supporting and transporting the die steel 5. Moreover, the rotation of the conveying rollers 12 can reduce the friction between the die steel 5 and the rollers and improve the transmission efficiency. The extrusion assembly is provided in two groups and is symmetrically arranged on the left and right sides of the frame 1. Each group of the extrusion assembly includes an extrusion block 13 and a first driving member 14. The extrusion block 13 is used for extruding the die steel 5 to make it deform, and the first driving member 14 is used for driving the extrusion block 13 to move in the left-right direction so that the two extrusion blocks 13 can approach or move away from each other. Extrusion portions 131 are provided on the sides of the two extrusion blocks 13 that approach each other. Among them, the first driving member 14 can be a cylinder, an electric push rod, etc.

[0032] Specifically, as Figures 1 to 4 shown, the die steel 5 is first preliminarily rolled by the hot rolling rollers 11 to make it reach a certain thickness and shape. Then, the die steel 5 is transported by the plurality of conveying rollers 12 to the position where the extrusion assembly is located. The first driving member 14 drives the extrusion block 13 to move in the left-right direction, so that the two extrusion blocks 13 approach each other, apply pressure to the die steel 5, and make it deform. After the extrusion is completed, the first driving member 14 drives the extrusion blocks 13 to move away from each other to release the die steel 5. Then, the die steel 5 is transported by the conveying rollers 12 to the position where the hot rolling rollers 11 are located for re-rolling, and the above steps are repeated until the die steel 5 reaches the required size and shape.

[0033] The lifting mechanism includes a plurality of support plates 21 and a second driving member 22. The plurality of support plates 21 are arranged at intervals in the length direction of the frame 1. Each support plate 21 is located in the gap between two adjacent conveying rollers 12. The second driving member 22 is used for driving the plurality of support plates 21 to move up and down synchronously. Among them, the second driving member 22 can be a cylinder, an electric push rod, etc.

[0034] Specifically, as Figures 1 to 4As shown, after completing a hot rolling, the mold steel 5 will be transferred to the extrusion assembly for extrusion. Before the extrusion operation, the driving member 22 is started to push multiple support plates 21 to move upward synchronously. The support plate 21 lifts the mold steel 5 to separate it from the surface of the conveying roller 12, thereby avoiding the mold steel 5 from causing wear to the conveying roller 12 during the extrusion process. After the mold steel 5 is lifted to an appropriate height, the extrusion assembly starts to work and performs an extrusion operation on the mold steel 5. Since the mold steel 5 is lifted, the extrusion assembly can extrude various parts of the mold steel 5 more evenly to ensure the quality and deformation uniformity of the mold steel 5. After the extrusion operation is completed, the driving member 22 reverses and drives the support plate 21 to move downward synchronously, and the mold steel 5 is placed back on the conveying roller 12 to continue the next hot rolling.

[0035] The dephosphorization mechanism includes a grinding component and a spraying component. The grinding component includes two grinding rollers 31. The two grinding rollers 31 are rotatably installed on the side of the two extrusion blocks 13 that are close to each other, and the extrusion block 13 is provided with a driving member 33 for driving the corresponding grinding roller 31 to rotate. The driving member 33 can be a motor. The spraying component is set into two groups and is correspondingly arranged on the two extrusion blocks 13. Each group of spraying components includes a water supply pipe 41, a plurality of dephosphorization nozzles 42 and a driving structure. The plurality of dephosphorization nozzles 42 are arranged at intervals along the length direction of the frame 1 and are respectively connected to the water supply pipe 41. An electromagnetic valve is provided between each dephosphorization nozzle 42 and the water supply pipe 41. The driving structure can drive an appropriate number of dephosphorization nozzles 42 to open according to the length of the mold steel 5.

[0036] Specifically, Figures 1 to 6 As shown, during the lifting process of the mold steel 5, the mold steel 5 will pass between the two extrusion blocks 13, and the left and right sides of the mold steel 5 will contact the grinding rollers 31 on both sides respectively. At this time, the driving member 33 drives the grinding roller 31 to rotate, and the oxide scale on the surface of the mold steel 5 can be removed through the contact and friction between the grinding roller 31 and the surface of the mold steel 5. Then, as the mold steel 5 is lifted, the driving structure can automatically select an appropriate number of dephosphorization nozzles 42 to open according to the length of the mold steel 5, and high-pressure water is sprayed onto the surface of the mold steel 5 through the dephosphorization nozzles 42 to further remove the oxide scale. Among them, as the number of hot rolling times of the mold steel 5 increases, the length of the mold steel 5 will gradually increase. Therefore, the number of dephosphorization nozzles 42 opened each time will also increase accordingly, ensuring that the spray range of the high-pressure water can perfectly cover the length of the mold steel 5 and avoid wasting resources.

[0037] In some embodiments, the lifting mechanism also includes multiple lifting plates 23, each lifting plate 23 is longitudinally slidable in the gap between two adjacent conveying rollers 12, and the multiple lifting plates 23 are fixedly connected, and each support plate 21 is connected to the upper end of the corresponding lifting plate 23.

[0038] In some embodiments, the driving structure includes a plurality of L-shaped contact plates 43, which are arranged in parallel along the length direction of the frame 1 and are respectively arranged corresponding to a plurality of dephosphorization nozzles 42. Each L-shaped contact plate 43 is longitudinally slidably matched with the extrusion block 13, and an elastic member 44 is provided between the extrusion block 13 for driving the L-shaped contact plate 43 to reset. The elastic member 44 can be a spring. Each L-shaped contact plate 43 includes a vertical plate 431 and a horizontal plate 432. The vertical plate 431 is longitudinally arranged on the opposite side of the two extrusion blocks 13, and the horizontal plates 432 are horizontally arranged at the upper end of the corresponding extrusion blocks 13, and a touch switch is provided between the extrusion blocks 13. The touch switch is connected to the electric control structure for controlling the opening and closing of the electromagnetic valve. It should be noted that the distance between the vertical plates 431 in the two groups of L-shaped contact plates 43 is smaller than the distance between the two grinding rollers 31, and the distance between the two grinding rollers 31 is smaller than the distance between the two extrusion blocks 13.

[0039] Specifically, Figures 1 to 6 As shown, in the initial state, the L-shaped contact plate 43 is in the initial position. After the mold steel 5 that has completed one hot rolling is transmitted to the conveying roller 12, the lifting mechanism lifts the mold steel 5 to make it separate from the surface of the conveying roller 12. During this process, the mold steel 5 will first contact with the two grinding rollers 31, and the grinding rollers 31 will initially remove the oxide scale on the surface of the mold steel 5 by rotating. As the mold steel 5 continues to move upward, the upper end of the mold steel 5 will contact with the lower end of the vertical plate 431 in the corresponding L-shaped contact plate 43, and the mold steel 5 will continue to move upward, pushing the L-shaped contact plate 43 to move upward, so that the elastic member 44 is stretched to store force. As the L-shaped contact plate 43 moves upward, the touch switch located between the horizontal plate 432 and the extrusion block 13 will receive a signal and transmit the signal to the electric control structure. The electric control structure The structure controls the corresponding electromagnetic valve to open, so that the corresponding dephosphorization nozzle 42 is opened, and high-pressure water is sprayed to dephosphorize the mold steel 5, while the dephosphorization nozzle 42 corresponding to the L-shaped contact plate 43 that is not in contact with the mold steel 5 remains closed to avoid wasting water resources; then the mold steel 5 continues to rise until the lower end of the mold steel 5 is higher than the grinding roller 31. At this time, the two extrusion blocks 13 are driven by the driving member 14 to continue to approach each other until the extrusion part 131 contacts the side wall of the mold steel 5 to extrude the mold steel 5. After the extrusion operation is completed, the lifting mechanism descends, so that the mold steel 5 gradually moves downward. In this process, the elastic member 2 44 releases the stored force, driving the L-shaped contact plate 43 to reset, and the touch switch returns to its initial state, controlling the corresponding electromagnetic valve to close, so that the corresponding dephosphorization nozzle 42 is closed.

[0040] In some embodiments, a cleaning assembly for cleaning the conveyor roller 12 is provided on the lifting mechanism. The cleaning assembly is provided in two groups and symmetrically arranged on both sides of the lifting plate 23. Each cleaning assembly includes an air supply pipe 24 and a plurality of branch pipes 25. Each branch pipe 25 is arranged in an L shape. The longitudinally arranged end of the branch pipe 25 is fixed to the corresponding lifting plate 23 and communicates with the air supply pipe 24. The horizontally arranged end of the branch pipe 25 is fixed to the lower end of the corresponding support plate 21 and is provided with a nozzle.

[0041] Specifically, as Figures 2 to 7 shown, when the driving member two 22 drives the support plate 21 and the lifting plate 23 to move downward, it can drive the cleaning assembly to move synchronously. During the downward movement, the nozzles of the cleaning assembly will gradually approach the surface of the conveyor roller 12. The air supply pipe 24 obtains high-pressure gas from the air source through a pipeline. The high-pressure gas flows through the branch pipes 25 to the nozzles, and the nozzles spray the high-pressure gas onto the surface of the conveyor roller 12. The impact force of the gas is used to remove the scale and other impurities falling on the conveyor roller 12, ensuring the cleanliness of the conveyor roller 12 and reducing the wear on the die steel 5.

[0042] In some embodiments, two mounting plates 26 are rotatably provided below the support plate 21. The two mounting plates 26 are symmetrically arranged on both sides of the lifting plate 23. One side of each mounting plate 26 facing the lifting plate 23 is rotatably connected to the support plate 21 through a torsion spring, and an elastic member one 27 is provided between the other side of each mounting plate 26 and the frame 1. The elastic member one 27 can be a spring, and the branch pipe 25 is made of a flexible material.

[0043] Specifically, as Figures 2 to 7As shown, in the initial state, the mounting plate 26 is kept in a horizontal state under the action of the torsion spring. At this time, the nozzle of the branch pipe 25 is horizontally arranged. When the lifting mechanism rises, the support plate 21 and the mounting plate 26 move upward, causing the first elastic member 27 to stretch and store energy. As the first elastic member 27 gradually stores energy, when the acting force of the first elastic member 27 is greater than that of the torsion spring, as the support plate 21 continues to move upward, the mounting plate 26 will rotate relative to the support plate 21 against the acting force of the torsion spring, causing the mounting plate 26 to tilt downward away from the lifting plate 23 from top to bottom. As the mounting plate 26 rotates, the nozzle of the branch pipe 25 will tilt downward. After the extrusion of the die steel 5 is completed, the lifting mechanism starts to descend, causing the support plate 21 and the mounting plate 26 to gradually move downward. At this time, the first elastic member 27 gradually releases the stored energy. When the acting force of the first elastic member 27 is less than that of the torsion spring, as the support plate 21 continues to move downward, the mounting plate 26 will be reset under the action of the torsion spring and gradually turn horizontal. At the same time, the nozzle of the branch pipe 25 gradually changes from tilting downward to horizontal. During the process of the nozzle changing from tilting to horizontal, since the two cleaning assemblies are symmetrically arranged on both sides of the lifting plate 23, high-pressure gas can be gradually blown from the middle of the conveyor roller 12 to both ends of the conveyor roller 12, ensuring the comprehensive cleaning of the conveyor roller 12. Therefore, during the descent of the lifting mechanism, through the cooperation of the torsion spring and the first elastic member 27, the nozzle of the branch pipe 25 can automatically adjust the angle to adapt to the movement of the lifting mechanism, ensuring the cleaning effect of the conveyor roller 12.

[0044] In some embodiments, the descaling nozzle 42 is located between the corresponding vertical plate 431 and the extrusion block 13, and the descaling nozzle 42 is inclined downward along the direction away from the extrusion block 13. The descaling nozzle 42 is provided with a sector nozzle.

[0045] Specifically, as Figures 2 to 6 shown, after the lower end of the vertical plate 431 contacts the upper end of the die steel 5, it can form a block at the upper end of the die steel 5. When the descaling nozzle 42 is opened for descaling operation, the vertical plate 431 can intercept the falling oxide scale on one side of the vertical plate 431, effectively preventing the oxide scale from flying. At the same time, the vertical plate 431 can also protect the descaling nozzle 42 to prevent the nozzle from being blocked by the oxide scale. In addition, the inclined descaling nozzle 42 can improve the descaling effect, ensuring that the high-pressure water flow can directly impact the oxide scale on the surface of the die steel 5 and wash it off.

[0046] In some embodiments, bristles 32 for removing mill scale are provided on the outer side of the grinding roll 31. The bristles 32 are made of wear-resistant and high-temperature-resistant materials, such as nylon or wire, to ensure their service life in a high-temperature environment. The bristles 32 are spirally installed on the outer side of the grinding roll 31. This layout can increase the contact area and contact time between the bristles 32 and the surface of the die steel 5, improving the descaling effect. Among them, the bristles 32 on the left grinding roll 31 are arranged to rotate counterclockwise from front to back, and the bristles 32 on the right grinding roll 31 are arranged to rotate clockwise from front to back. When the grinding roll 31 rotates, the shed mill scale can be guided downward onto the conveyor roll 12, preventing the mill scale from accumulating on the surface of the die steel 5 and further reducing the problem of mill scale flying.

[0047] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A die steel hot rolling device, comprising a frame (1), a hot rolling roller (11) being provided at one end of the frame (1), a plurality of conveying rollers (12) being rotatably provided on the frame (1), and extrusion assemblies being provided on both sides of the frame (1), the extrusion assemblies comprising an extrusion block (13) and a driving member 1 (14), the driving member 1 (14) being used to drive the extrusion block (13) to move along the width direction of the frame (1), characterized in that: It also includes a lifting mechanism, a dephosphorization mechanism and a cleaning component; The lifting mechanism comprises a plurality of support plates (21) and a second driving member (22), wherein the plurality of support plates (21) are arranged at intervals along the length direction of the frame (1), and each support plate (21) is located in a gap between two adjacent conveying rollers (12), and the second driving member (22) is used for driving the plurality of support plates (21) to move up and down synchronously; The dephosphorization mechanism comprises a grinding component and a spraying component, the grinding component comprises two grinding rollers (31), the two grinding rollers (31) are rotatably mounted on the sides of two extrusion blocks (13) close to each other, the spraying component is provided in two groups and is correspondingly provided on the two extrusion blocks (13), each group of the spraying component comprises a water supply pipe (41), a plurality of dephosphorization nozzles (42) and a driving structure, the plurality of dephosphorization nozzles (42) are arranged at intervals along the length direction of the frame (1), an electromagnetic valve is provided between each dephosphorization nozzle (42) and the water supply pipe (41), and the driving structure can drive an appropriate number of dephosphorization nozzles (42) to open according to the length of the mold steel (5); The cleaning components are provided in two groups, each group of cleaning components comprises an air supply pipe (24) and a plurality of branch pipes (25), two mounting plates (26) are rotatably provided below the support plate (21), the two mounting plates (26) are symmetrically provided, opposite sides of the two mounting plates (26) are rotatably connected to the support plate (21) via torsion springs, and an elastic member (27) is provided between the other sides and the frame (1), each branch pipe (25) is provided in an L-shape, a horizontally provided end portion of the branch pipe (25) is fixed to the lower end of the corresponding mounting plate (26), and a nozzle is provided, and the branch pipe (25) is formed by a flexible material.

2. A die steel hot rolling device according to claim 1, characterized in that: The lifting mechanism further comprises a plurality of lifting plates (23), each lifting plate (23) being longitudinally slidably disposed in a gap between two adjacent conveying rollers (12), the plurality of lifting plates (23) being fixedly connected to each other, and each supporting plate (21) being connected to the upper end of a corresponding lifting plate (23).

3. A die steel hot rolling device according to claim 1, characterized in that: The driving structure comprises a plurality of L-shaped contact plates (43), the plurality of L-shaped contact plates (43) being arranged in parallel along the length direction of the frame (1) and being respectively arranged corresponding to the plurality of dephosphorization nozzles (42), each L-shaped contact plate (43) being longitudinally slidably matched with the extrusion block (13), and being provided with an elastic member 2 (44) between the L-shaped contact plate (43) and the extrusion block (13) for driving the L-shaped contact plate (43) to reset, each L-shaped contact plate (43) comprising a vertical plate (431) and a horizontal plate (432), the vertical plate (431) being longitudinally arranged on the opposite side of the two extrusion blocks (13), the horizontal plate (432) being horizontally arranged at the upper end of the corresponding extrusion block (13), and being provided with a touch switch between the L-shaped contact plate (43) and the extrusion block (13), the touch switch being connected to the electric control structure for controlling the opening and closing of the electromagnetic valve.

4. A die steel hot rolling device according to claim 3, characterized in that: The distance between the vertical plates (431) in the two groups of L-shaped contact plates (43) is smaller than the distance between the two grinding rollers (31), and the distance between the two grinding rollers (31) is smaller than the distance between the two extrusion blocks (13).

5. A die steel hot rolling device according to claim 4, characterized in that: The dephosphorization nozzle (42) is located between the corresponding vertical plate (431) and the extrusion block (13).

6. A die steel hot rolling device according to claim 5, characterized in that: The dephosphorization nozzle (42) is arranged obliquely downward in a direction away from the extrusion block (13).

7. A die steel hot rolling device according to claim 1, characterized in that: Brushes (32) for removing oxide scale are provided on the outer side of the grinding roller (31), and the brushes (32) are installed on the outer side of the grinding roller (31) in a spiral shape.

8. The die steel hot rolling device according to claim 1, characterized in that: The dephosphorization nozzle (42) is provided with a fan-shaped nozzle.

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