Automatic transporting and pressing device and method for large plate heat treatment quenching

Abstract

The application discloses a kind of big board heat treatment quenching automatic transport and press device and method, including cooling module B and leveling module C being arranged in series along the direction of big board conveying, cooling module B includes cooling pool, the inside of the cooling pool is provided with liftable receiving frame, and multiple groups of conveying rollers for carrying and conveying big board are horizontally arranged on the receiving frame.This application sets up heating furnace A, cooling module B, leveling module C, roller conveying way D, normal temperature water cooling tank E and collection point F in series, and linkage control is carried out through control system, so that multiple big boards can be continuously transported between them, the big board conveying time is shortened, and the leveling module C is combined with the upper pressing plate and the lower pressing plate controlled by the hydraulic telescopic rod, so that the advantages of automatic continuous operation of mesh belt equipment are considered, the adjustable big board leveling pressure is completed, and the big board leveling precision and finished product qualification rate are improved.

Description

Technical Field

[0001] This invention relates to the field of high wear-resistant steel processing technology, specifically to an automatic pressing device and method for heat treatment and quenching of large plates. Background Technology

[0002] Currently, leveling equipment for steel plates after heat treatment and quenching is mainly divided into two categories: hydraulic leveling equipment and mesh belt leveling equipment, which are widely used in the steel heat treatment processing industry. Traditional hydraulic leveling equipment is a split-type operation device and is a relatively outdated leveling equipment in the industry. During the operation, workers need to manually load and unload the steel plate workpieces and manually position them. The equipment has a very low degree of automation and is only suitable for leveling small, scattered steel plate workpieces, resulting in low operating efficiency.

[0003] Compared to the separate operation mode of traditional hydraulic leveling equipment, mesh belt leveling equipment can perform automated continuous operation, enabling continuous conveying and automated leveling of large plate workpieces without frequent manual intervention. However, the leveling pressure of mesh belt leveling equipment is relatively low, and the design of the pressure-bearing structure is limited, resulting in insufficient leveling force. It can only be used for small-sized and thin-thick steel plate workpieces. It cannot apply corresponding pressure to level workpieces of different sizes and thicknesses. Especially for large-sized and thick plate workpieces, it cannot achieve effective leveling, resulting in incomplete leveling, warping defects, and poor flatness of the plate. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic pressing device and method for heat treatment and quenching of large plates, which solves the problem in the prior art of lacking a device that can adapt to large-size plate workpieces and has both automated assembly line operation capability and high-pressure leveling capability.

[0005] The objective of this invention can be achieved through the following technical solutions: An automatic conveying and pressing device for heat treatment and quenching of large plates includes a cooling module B and a leveling module C arranged in series along the conveying direction of the large plates. The cooling module B includes a cooling pool with a liftable receiving frame inside. Multiple sets of conveyor rollers for carrying and conveying the large plates in and out are horizontally arranged on the receiving frame. The leveling module C includes a four-column frame assembled from a base frame, columns, and a top plate. A fixed lower pressure plate and a floating upper pressure plate are installed on the four-column frame. Side rollers are symmetrically rotated on both sides of the base frame. A mesh conveyor belt is wound between two sets of side rollers. One end of each set of side rollers is connected to a control motor. The upper bearing surface of the mesh conveyor belt passes through the top surface of the lower pressure plate. The large plates are conveyed to and from the lower pressure plate station by the mesh conveyor belt. A hydraulic telescopic rod is installed on the inner side of the top plate to drive the upper pressure plate to move up and down. The hydraulic telescopic rod drives the upper pressure plate to press down and cooperate with the lower pressure plate to perform hot leveling of the large plates.

[0006] Preferably, the cooling module B is provided with a lifting module, which consists of two symmetrically arranged gantry frames and hydraulic telescopic cylinders. The two gantry frames are fixed to the outer sides of both ends of the cooling pool, and the upper end of the hydraulic telescopic cylinder is hinged to the inner side of the gantry frame crossbeam. The top of the receiving frame is fixedly connected to a connecting frame at the corresponding position of the gantry frame, and the lower end of the hydraulic telescopic cylinder is hinged to the connecting frame at the top of the receiving frame.

[0007] Preferably, the cooling pool has a feed end and a discharge end at both ends. By controlling the hydraulic telescopic cylinder to retract, the receiving frame is raised to the upper limit position, so that the top surface of the conveyor roller, the feed end and discharge end of the cooling pool and the top surface of the mesh conveyor belt form a continuous transmission surface.

[0008] Preferably, the cooling pool contains brine, and by controlling the extension of the hydraulic telescopic cylinder, the receiving frame is lowered and submerged in the brine of the cooling pool.

[0009] Preferably, the receiving frame is composed of two side plates and a top plate, and its bottom is open. The two side plates of the receiving frame are respectively fixedly connected to a first cover and a second cover. The first cover is provided with a plurality of first sprockets and a first chain. The ends of the plurality of conveying rollers extending into the first cover are fixedly connected to the first sprockets. Adjacent sprockets are driven by meshing through the first chain.

[0010] Preferably, a drive motor is installed inside the top housing of the receiving frame, and a second sprocket and a second chain are provided inside the second cover. A conveyor roller and one end of the motor shaft extending into the second cover are both fixedly connected to the second sprocket, and the two second sprockets are meshed and driven by the second chain.

[0011] Preferably, the end of the mesh conveyor belt away from the lower pressure plate is located inside the base frame, and the base frame is provided with two auxiliary rollers for tensioning the mesh conveyor belt.

[0012] Preferably, each of the four corners of the upper pressure plate is provided with a guide module. The guide module includes a connecting sleeve and a guide wheel. The four connecting sleeves are fixedly connected to the four corners of the upper pressure plate and are respectively fitted onto the outer wall of a column. The top surface of the connecting sleeve is rotatably connected to the guide wheel, and the guide wheel is locked onto the outer wall of the column.

[0013] Preferably, positioning rods are symmetrically fixed on both sides of the upper pressure plate. The length of the positioning rods is less than the length of the column. The positioning rods move up with the upper pressure plate until the top of the positioning rods abuts against the inner bottom surface of the top plate.

[0014] A pressing method for an automatic pressing device for heat treatment and quenching of large plates includes the following steps: S1: The large plate is fed into the roller hearth heating furnace and heated to 900℃ in stages to complete austenitization. After the temperature reaches the standard, it is uniformly fed into the cooling module B by the conveying rollers in the furnace. S2: The receiving frame at the upper limit in the cooling module B receives the heated plate and transports the plate completely into the receiving frame through the conveyor roller controlled by the drive motor. Then, the receiving frame holding the plate is moved to the lower limit by the lifting module. Under the cooling of brine, the temperature of the plate drops to 200°. At this time, the crystals in the plate change from austenite to martensite. S3: The receiving frame holding the large plate is raised to the upper limit position again through the lifting module in the cooling module B, that is, the position is flush with the top surface of the mesh conveyor belt of the leveling module C. Then, the cooled large plate is transported to the top surface of the mesh conveyor belt of the leveling module C through the multiple sets of conveyor rollers in the cooling module B. S4: After the large plate is transported to the middle position of the lower pressure plate by the mesh conveyor belt, the control system automatically opens the hydraulic telescopic rod, so that the hydraulic telescopic rod drives the upper pressure plate to press down and cooperate with the lower pressure plate to perform hot leveling of the large plate. S5: After the large plate is flattened in the leveling module C, it is automatically transported to the roller conveyor D by the mesh conveyor belt. The large plate is continuously air-cooled and transported along the roller conveyor D, and then enters the ambient temperature water cooling tank E to complete the final cooling and shaping. It is continuously transported to the collection point F, realizing the continuous flow from material feeding to finished product collection.

[0015] The beneficial effects of this invention are: 1. This invention connects a heating furnace A, a cooling module B, a leveling module C, a roller conveyor D, a room temperature water cooling tank E, and a collection point F in series, and controls them together through a control system. This allows multiple large plates to be continuously transported between them, shortening the transport time. The leveling module C combines a mesh conveyor belt with upper and lower pressure plates, allowing for adjustable leveling pressure for the large plates while maintaining the advantages of automated continuous operation of mesh belt equipment. This solves the problems of insufficient pressure, uneven leveling of large plates, and inadequate deformation correction in conventional mesh belt equipment, improving the leveling accuracy of large plates and the finished product qualification rate.

[0016] 2. In this invention, the heating furnace A, cooling module B, leveling module C, roller conveyor D, ambient temperature water cooling tank E, and collection point F are connected in series, with small transport distances between them. This shortens the interval between the large plate being transferred to the quenching cooling tank after austenitizing heating in the heating furnace and the time for the large plate to be transferred to the leveling module C after quenching and cooling. This avoids secondary deformation of the large plate due to excessive dwell time, and thus prevents warping defects caused by quenching from not being corrected in time, ensuring the flatness of the large plate. Attached Figure Description

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the large plate processing and transportation route in this invention; Figure 2 This is a schematic diagram of the combined structure of cooling module B and leveling module C in this invention; Figure 3 This is a schematic diagram of the structure of cooling module B in this invention; Figure 4 This is a schematic diagram of the connection structure between the cooling pool and the gantry in this invention; Figure 5 This is a schematic diagram of the connection structure between the receiving frame and the conveying roller in this invention; Figure 6 This is a schematic diagram of the cooperation structure between the second sprocket and the second chain in this invention; Figure 7 This is a schematic diagram of the mating structure of the first sprocket and the first chain in this invention; Figure 8 This is a schematic diagram of the flattening module C structure in this invention; Figure 9 This is a schematic diagram of the combined structure of the upper pressure plate, lower pressure plate, and mesh conveyor belt in this invention; Figure 10 This is an exploded view of the upper and lower pressure plates in this invention.

[0019] In the diagram: 1. Cooling pool; 11. Feeding end; 12. Discharge end; 2. Receiving frame; 21. Connecting frame; 3. Conveyor roller; 31. First cover; 311. First sprocket; 312. First chain; 32. Second cover; 321. Second sprocket; 322. Second chain; 4. Drive motor; 5. Lifting module; 51. Gantry frame; 52. Hydraulic telescopic cylinder; 6. Base frame; 61. Column; 62. Top plate; 7. Lower pressure plate; 8. Side roller; 81. Mesh conveyor belt; 82. Control motor; 83. Auxiliary roller; 9. Upper pressure plate; 91. Hydraulic telescopic rod; 92. Guide module; 921. Connecting sleeve; 922. Guide wheel; 93. Positioning rod; 10. Water tank. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention enables continuous operation of multiple large plates from feeding to finished product collection by continuously heating, controlling brine quenching, hot pressing and leveling, and multi-stage cooling and shaping when heat-treating and quenching large plates (e.g., 1250*2500mm size). While ensuring hardening performance, it effectively corrects quenching deformation through hot pressing and leveling, thereby improving product flatness and production consistency.

[0022] For details, please refer to Figures 1 to 10 As shown, an automatic pressing device and method for heat treatment and quenching of large plates includes the following steps (S1 to S5): S1: Perform heat treatment on the large plate, and move the large plate along the attached... Figure 1 The material in the direction of the arrow (large metal plates, such as steel plates) is first fed into heating furnace A. Heating furnace A is a roller hearth continuous heating furnace. For commonly used carbon structural steel plates, the austenitizing heating temperature is set to 880~920℃ (preferably 900℃). The holding time is matched to 8~12 minutes for every 10mm of plate thickness to ensure that the temperature uniformity deviation of the plate cross section is ≤±10℃, eliminating uneven quenching stress caused by temperature gradient. For special materials such as alloy steel, the heating temperature and holding time can be flexibly adjusted through the system formula. Once the plate reaches the specified temperature and is aligned with the feeding end 11 of the cooling module B, the equipped control system (i.e., the integrated electrical control system of the connected equipment, which is not specifically shown in the attached figure) automatically triggers the matching motor at the heating furnace A, driving the conveyor roller in the heating furnace to transport the heat-treated plate to the feeding end 11 of the cooling module B.

[0023] S2: Salt water is injected into cooling module B. The heated plate is transported to cooling module B by conveyor rollers. Under the cooling of salt water, the temperature of the plate drops to 200°C. At this time, the crystals in the plate change from austenite to martensite. The plate is less prone to cracking due to the cooling effect of salt water. Cooling pool 1 contains 5% to 10% NaCl salt water as a quenching medium. Compared with water, it can significantly improve the cooling rate in the high-temperature zone, ensuring that the hardened layer depth and hardness of the plate meet the standards. At the same time, the cooling rate in the low-temperature zone is slow, which can effectively reduce the structural stress during the martensitic transformation process and reduce the risk of quenching cracks and warping of the plate. The final quenching temperature is controlled at 180~220°C (preferably 200°C). At this time, the transformation of austenite to martensite reaches more than 80%, leaving a small amount of plasticity allowance, providing the best plasticity window for subsequent hot pressing and shaping.

[0024] It should be noted that the cooling pool 1 is equipped with an automatic brine circulation temperature control device, which consists of a refrigeration unit, a plate heat exchanger, a bag filter and a variable frequency circulation pump. It is not specifically shown in the attached drawing. This device is used to stably control the brine working temperature at 20~40℃ and automatically start heat exchange to cool down when the temperature exceeds the threshold.

[0025] See Figures 3 to 6 As shown, the cooling pool 1 is equipped with a receiving frame 2, which is a portal-type integral welded frame composed of two side plates and a top plate 62. The bottom is open to reduce the flow resistance of the quenching liquid. Multiple sets of conveying rollers 3 are arranged horizontally inside the receiving frame 2. The rollers are made of stainless steel corrosion-resistant material. See Figures 5 to 7As shown, in order to enable one drive motor 4 to control multiple conveying rollers 3 to rotate simultaneously, the sides of the two side plates of the receiving frame 2 are respectively fixedly connected to a first cover 31 and a second cover 32. The first cover 31 is provided with multiple first sprockets 311 and a first chain 312, which can realize the linkage between multiple conveying rollers 3; that is, the end of each of the multiple conveying rollers 3 extending into the first cover 31 is fixedly connected to a first sprocket 311, and two adjacent first sprockets 311 are meshed and driven by a first chain 312. See Figures 5 to 7 As shown, the second housing 32 is equipped with a second sprocket 321 and a second chain 322, which enables the linkage between a conveyor roller 3 and the motor shaft of the drive motor 4. The drive motor 4 is installed in the top housing of the receiving frame 2. That is, the second sprocket 321 is fixedly connected to one end of the conveyor roller 3 and the motor shaft extending into the second housing 32. The second chain 322 meshes between the two second sprockets 321. The power is transmitted to the active conveyor roller 3 through the drive motor 4 and the second chain 322, so that a single drive motor 4 can drive all the conveyor rollers 3. A sealing end cap is provided at the joint between the first housing 31 and the second housing 32 to prevent salt water from splashing in and corroding the internal components.

[0026] S3: The lifting module 5 in the cooling module B completes the alignment of the large plate during transport between the heating furnace A, the cooling module B, and the leveling module C. Specifically: See Figures 3 to 4 As shown, the lifting module 5 consists of two symmetrically arranged gantry frames 51 and hydraulic telescopic cylinders 52. The two gantry frames 51 are fixed to the outer sides of both ends of the cooling pool 1. The upper end of the hydraulic telescopic cylinder 52 is hinged to the inner side of the crossbeam of the gantry frame 51, and the lower end is hinged to the connecting frame 21 at the top of the support frame 2. The two sets of hydraulic telescopic cylinders 52 share the same hydraulic pump station (as shown in the attached diagram). Figure 3 (As shown).

[0027] The lower limit of the receiving frame 2 in the cooling pool 1: The receiving frame 2 descends to the quenching station, and the large plate is completely immersed in the brine; See Figure 3 As shown, the upper limit of the receiving frame 2 in the cooling pool 1: the receiving frame 2 is raised to the conveying station, and the top surface of the conveyor roller 3 is coplanar with the top surfaces of the feeding end 11 and the discharging end 12 of the cooling pool 1. That is, the conveyor roller 3 and the top surface of the mesh conveyor belt 81 of the leveling module C form a continuous conveying surface to ensure the smooth transition of the large plate.

[0028] S4: After the large plate is transported to the middle position of the lower pressure plate 7 via the mesh conveyor belt 81, the control system automatically activates the hydraulic telescopic rod 91. The hydraulic telescopic rod 91 drives the upper pressure plate 9 to press downwards, cooperating with the lower pressure plate 7 to perform hot leveling of the large plate. Utilizing the residual heat of the large plate at approximately 200℃ after quenching and the plasticity of the microstructure transformation, the pressure constraint counteracts the warping of the plate surface caused by quenching thermal stress and microstructure stress, achieving integrated quenching and shaping. The flattening unit pressure is set to 5~15MPa according to the material and plate thickness, and the holding time is 140s. After leveling, the flatness of the large plate can be controlled within 1mm / m. Specifically: See Figures 8 to 10 As shown, the leveling module C adopts a four-column frame: including a base frame 6, with a column 61 fixedly connected to each of the four corners of the top surface of the base frame 6, and a top plate 62 fixedly connected to the top surface of the four columns 61; a lower pressure plate 7 is fixedly connected to the middle of the base frame 6, and correspondingly, an upper pressure plate 9 corresponding to the size of the lower pressure plate 7 is provided at the lower part of the top plate 62, and a hydraulic telescopic rod 91 is provided on the inner top surface of the top surface to drive the upper pressure plate 9 to move up and down. The pressure applied to the large plate by the upper pressure plate 9 is adjusted by adjusting the pressure of the hydraulic telescopic rod 91. See Figures 9 to 10 As shown, a side roller 8 is symmetrically rotated on both sides of the base frame 6. Both ends of the side roller 8 are equipped with baffles to limit the transport route of the large plate on the mesh conveyor belt 81. The mesh conveyor belt 81, which is in the form of a stainless steel spiral, is installed between the two side rollers 8. One end of the mesh conveyor belt 81 moves along the top surface of the lower pressure plate 7, and the other end of the mesh conveyor belt 81 moves inside the base frame 6. The base frame 6 is equipped with two auxiliary rollers 83, which can tension the mesh conveyor belt 81. One end of a set of side rollers 8 is equipped with a control motor 82, which makes the mesh conveyor belt 81 move in a ring. See Figure 10 As shown, in order to limit the vertical movement trajectory of the upper pressure plate 9, guide modules 92 are provided at the four corners of the upper pressure plate 9. The guide module 92 includes a connecting sleeve 921 and a guide wheel 922. The four connecting sleeves 921 are fixedly connected to the four corners of the upper pressure plate 9 respectively, and are respectively sleeved on the outer wall of a column 61. The top surface of the connecting sleeve 921 is rotatably connected to the guide wheel 922, and the guide wheel 922 is locked on the outer wall of the column 61. See Figure 8 and Figure 10 As shown, positioning rods 93 are symmetrically fixed on both sides of the upper pressure plate 9, and polyurethane buffer pads are installed at the top of the rods. When the upper pressure plate 9 rises to its upper limit, the top surface of the positioning rod 93 abuts against the bottom surface of the top plate 62 and is limited. At this time, the distance between the bottom surface of the pressure plate and the top surface of the mesh belt is ≥50mm, allowing large plates with warping to pass smoothly. A water tank 10 is provided inside the base frame 6. The end of the mesh conveyor belt 81 near the auxiliary roller 83 is located in the water tank 10. The water tank 10 contains water, which can assist in cooling the mesh conveyor belt 81.

[0029] After the large plate stops at the center of the lower pressure plate 7, the control system automatically starts the hydraulic telescopic rod 91 to push the upper pressure plate 9 downward to press it. After reaching the set pressure, it enters the pressure holding timer. After the pressure holding ends, the upper pressure plate 9 rises back to the upper limit position, and the mesh conveyor belt 81 automatically starts to send out the leveled large plate. At the same time, the next plate is fed, realizing the cycle-based continuous production.

[0030] S5: After leveling, the large slab is fed into the roller conveyor D by the mesh conveyor belt 81, which is supported by a dense roller structure and the conveying speed is adjustable. During the conveying process, the large slab is naturally air-cooled, and the temperature drops from about 200℃ to 100~150℃, allowing the martensitic transformation to proceed fully and avoiding additional internal stress caused by direct water cooling. The roller conveyor ends at the ambient temperature water cooling tank E, which is equipped with an immersion conveyor roller. The slab is soaked in water for 3~5 minutes, and the overall temperature drops to below 50℃, completing the final cooling and shaping. At the same time, the water flow can wash away residual salt and iron oxide scale on the slab surface, improving surface cleanliness. An air knife drying device is installed at the outlet of the ambient temperature water cooling tank E, and the high-pressure airflow quickly removes water stains from the surface of the large slab. The dried slab is conveyed to the collection point F, completing the entire process.

[0031] In summary, after the large plate is loaded, it passes through the heating furnace A at a constant speed and continuously through each temperature zone of the heating furnace A via the conveyor rollers, and is heated to 900℃ to complete austenitization. After exiting the furnace, it is directly connected to the cooling module feed end 11 along the conveyor line, with uninterrupted transfer throughout the process. Subsequently, the heated large plate enters the cooling module receiving frame 2, and is immersed in the brine of the cooling pool 1 for quenching as the receiving frame 2 descends. After the large plate cools to 200℃, the receiving frame 2 is raised and reset, and the surface of the conveyor roller 3 is flush with the discharge end 12 of the cooling pool 1. The large plate is continuously conveyed and seamlessly connected to the surface of the mesh conveyor belt 81 of the leveling module C. Then, the large plate is continuously conveyed to the middle position of the lower pressure plate 7 via the mesh conveyor belt 81. After hot pressing and leveling, the mesh conveyor belt 81 immediately starts to continuously send the large plate out of the leveling module C and directly connect to the roller conveyor D. The large plate is continuously air-cooled and conveyed along the roller conveyor D, and then enters the ambient temperature water cooling tank E to complete the final cooling and shaping. The entire process is uninterrupted and conveyed to the collection point F, realizing continuous flow from material feeding to finished product collection.

[0032] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. An automatic pressing device for heat treatment and quenching of large plates, characterized in that, It includes a cooling module B and a leveling module C arranged in series along the conveying direction of the large plate. The cooling module B includes a cooling pool (1). The cooling pool (1) is equipped with a liftable support frame (2). Multiple sets of conveying rollers (3) for carrying and conveying the large plate in and out are arranged horizontally on the support frame (2). The leveling module C includes a four-column frame consisting of a base frame (6), columns (61), and a top plate (62). The four-column frame is equipped with a fixed lower pressure plate (7) and an upper pressure plate (9) that can float up and down. Side rollers (8) are symmetrically rotated on both sides of the base frame (6). A mesh conveyor belt (81) is wound between the two sets of side rollers (8). One end of each set of side rollers (8) is connected to a control motor (82). The upper bearing surface of the mesh conveyor belt (81) passes through the top surface of the lower pressure plate (7). The large plate is fed and discharged at the lower pressure plate (7) station by means of the mesh conveyor belt (81). A hydraulic telescopic rod (91) is installed on the inner side of the top plate (62) to drive the upper pressure plate (9) to lift and lower. The hydraulic telescopic rod (91) drives the upper pressure plate (9) to press down and cooperate with the lower pressure plate (7) to perform hot leveling of the large plate.

2. The automatic pressing device for heat treatment and quenching of large plates according to claim 1, characterized in that: The cooling module B is provided with a lifting module (5). The lifting module (5) consists of two sets of symmetrically arranged gantry frames (51) and hydraulic telescopic cylinders (52). The two gantry frames (51) are fixed on the outer sides of both ends of the cooling pool (1). The upper end of the hydraulic telescopic cylinder (52) is hinged to the inner side of the crossbeam of the gantry frame (51). The top of the receiving frame (2) is fixedly connected to the connecting frame (21) at the position corresponding to the gantry frame (51). The lower end of the hydraulic telescopic cylinder (52) is hinged to the connecting frame (21) at the top of the receiving frame (2).

3. The automatic pressing device for heat treatment and quenching of large plates according to claim 2, characterized in that: The cooling pool (1) has a feed end (11) and a discharge end (12) at both ends. By controlling the hydraulic telescopic cylinder (52) to retract, the receiving frame (2) is raised to the upper limit position, so that the top surface of the conveyor roller (3), the feed end (11) and the discharge end (12) of the cooling pool (1) and the top surface of the mesh conveyor belt (81) form a continuous transmission surface.

4. The automatic pressing device for heat treatment and quenching of large plates according to claim 3, characterized in that: The cooling pool (1) contains brine. By controlling the extension of the hydraulic telescopic cylinder (52), the receiving frame (2) is lowered and submerged in the brine of the cooling pool (1).

5. The automatic pressing device for heat treatment and quenching of large plates according to claim 1, characterized in that: The receiving frame (2) is composed of two side plates and a top plate (62), and its bottom is open. The two side plates of the receiving frame (2) are respectively fixedly connected to a first cover (31) and a second cover (32). The first cover (31) is provided with multiple first sprockets (311) and a first chain (312). Multiple conveying rollers (3) are fixedly connected to the first sprockets (311) at one end inside the first cover (31). Two adjacent first sprockets (311) are meshed and driven by a first chain (312).

6. The automatic pressing device for heat treatment and quenching of large plates according to claim 5, characterized in that: The top housing of the receiving frame (2) is equipped with a drive motor (4), and the second cover (32) is provided with a second sprocket (321) and a second chain (322). A conveyor roller (3) and one end of the motor shaft extending into the second cover (32) are both fixedly connected to the second sprocket (321), and the two second sprockets (321) mesh with the second chain (322).

7. The automatic pressing device for heat treatment and quenching of large plates according to claim 1, characterized in that: The end of the mesh conveyor belt (81) away from the lower pressure plate (7) is located inside the base frame (6), and the base frame (6) is provided with two auxiliary rollers (83) for tensioning the mesh conveyor belt (81).

8. The automatic pressing device for heat treatment and quenching of large plates according to claim 1, characterized in that: The upper pressure plate (9) is provided with guide modules (92) at each of its four corners. The guide module (92) includes a connecting sleeve (921) and a guide wheel (922). The four connecting sleeves (921) are fixedly connected to the four corners of the upper pressure plate (9) and are respectively fitted on the outer wall of a column (61). The top surface of the connecting sleeve (921) is rotatably connected to the guide wheel (922), and the guide wheel (922) is locked on the outer wall of the column (61).

9. The automatic pressing device for heat treatment and quenching of large plates according to claim 1, characterized in that: The upper pressure plate (9) is symmetrically fixed with positioning rods (93) on both sides. The length of the positioning rods (93) is less than the length of the column (61). The positioning rods (93) move upward with the upper pressure plate (9) until the top of the positioning rods (93) abuts against the inner bottom surface of the top plate (62).

10. A pressing method for an automatic pressing device for heat treatment and quenching of large plates, applicable to the automatic pressing device for heat treatment and quenching of large plates as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: The large plate is fed into the roller hearth heating furnace and heated to 900℃ in stages to complete austenitization. After the temperature reaches the standard, it is uniformly fed into the cooling module B by the conveying rollers in the furnace. S2: The receiving frame (2) in the upper limit position of the cooling module B receives the heated plate and transports the plate completely into the receiving frame (2) through the conveying roller (3) controlled by the drive motor (4). Then, the receiving frame (2) holding the plate is moved to the lower limit position through the lifting module. Under the salt water cooling, the plate temperature drops to 200°. At this time, the crystal in the plate changes from austenite to martensite. S3: The receiving frame (2) holding the large plate is raised to the upper limit position through the lifting module (5) in the cooling module B, that is, the position is flush with the top surface of the mesh conveyor belt (81) of the leveling module C. Then, the cooled large plate is transported to the top surface of the mesh conveyor belt (81) of the leveling module C through the multiple sets of conveyor rollers (3) in the cooling module B. S4: After the large plate is transported to the middle position of the lower pressure plate (7) by the mesh conveyor belt (81), the hydraulic telescopic rod (91) is opened, so that the hydraulic telescopic rod (91) drives the upper pressure plate (9) to press down and cooperate with the lower pressure plate (7) to perform hot leveling of the large plate; S5: After the large plate is flattened in the leveling module C, it is automatically transported to the roller conveyor D by the mesh conveyor belt (81). The large plate is continuously air-cooled along the roller conveyor D and then enters the ambient temperature water cooling tank E to complete the final cooling and shaping. It is continuously transported to the collection point F throughout the process, realizing the continuous flow from feeding to finished product collection.

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