A device for direct-cooling semi-continuous casting of a hard aluminum alloy slab and a casting method thereof

Abstract

The application discloses a kind of hard aluminium alloy flat ingot direct cooling semi-continuous casting device and its casting method, it is related to casting device technical field, including casting mechanism, the adjusting mechanism includes two mounting brackets, the top of each described mounting bracket is additionally installed with a group of electric cylinders, multiple described electric cylinders are additionally installed with porous plate between telescopic end head, the bottom of described porous plate is additionally installed with multiple four-way pipes, multiple five-way pipes and multiple two-way pipes, multiple described four-way pipes, multiple five-way pipes and multiple two-way pipes are communicated with multiple communication pipes and multiple cold water rollers, the electric cylinder, porous plate, four-way pipe, five-way pipe and two-way pipe are cooperatively arranged, can be realized to let cold water roller reciprocating motion, to realize the adjustment to the small bulging deformation of casting blank surface, simultaneously by setting flow limiting plate, excessive cold water can be blocked to reach the corner of casting blank, to reduce the bending warping condition of casting blank, help to improve the quality of prepared hard aluminium alloy flat ingot.

Description

Technical Field

[0001] This invention relates to the field of casting equipment technology, specifically to a direct-cooling semi-continuous casting device for hard aluminum alloy flat ingots and its casting method. Background Technology

[0002] The direct-cooling semi-continuous casting device is an intermittent semi-continuous metallurgical forming equipment. The principle is to inject the melt into the water-cooled crystallizer to form the initial billet shell, and then let the billet move downward out of the crystallizer and directly spray cooling water to carry out secondary direct cooling until the ingot reaches the set length and then the casting stops. Currently, the mainstream hard aluminum alloy flat ingot adopts vertical casting direct-cooling semi-continuous casting. This casting device can ensure that the ingot grains are fine and the composition and structure are uniform, which can reduce the tendency to crack.

[0003] In existing vertical casting direct cooling semi-continuous casting equipment, during the secondary cooling of hard aluminum alloy billets, the significant differences in cooling intensity across the billet's wide face, narrow face, and corners (corners naturally have a faster heat dissipation rate) lead to inconsistent shrinkage in different parts of the billet. This can cause the billet to warp and bend. Simultaneously, when the billet enters the secondary cooling zone and is directly sprayed with cooling water, its surface layer experiences a rapid cooling and shrinkage, while the core of the billet remains at a high temperature. This results in high thermal stress due to the large temperature difference between the inside and outside of the billet. The superposition of this thermal stress and the internal molten static pressure causes the billet shell to undergo slight bulging deformation. At this point, the combined effect of warping and bulging defects results in substandard flat ingots.

[0004] Therefore, we propose a direct-cooling semi-continuous casting device for hard aluminum alloy flat ingots to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a direct-cooling semi-continuous casting apparatus for hard aluminum alloy flat ingots, so as to solve the problem mentioned in the background art that warping and bulging occur during the casting process of hard aluminum alloys, resulting in substandard flat ingots.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a direct cooling semi-continuous casting device for hard aluminum alloy flat ingots, comprising a casting mechanism, wherein the casting mechanism includes a hydraulic cylinder, a housing and a flow divider, and an adjustment mechanism is provided inside the housing; The adjustment mechanism includes two mounting brackets, each mounting bracket having a set of electric cylinders mounted on its top. A perforated plate is installed between the telescopic ends of the electric cylinders. A set of four-way pipes, five-way pipes, and two-way pipes are installed at the bottom of the perforated plate. A set of connecting pipes and a set of cold water rollers are connected between the four-way pipes, five-way pipes, and two-way pipes. A sealing ring is provided inside each four-way pipe, each five-way pipe, and each two-way pipe. A flow limiting plate is fixed at each included angle of each through hole on the distributor, and the flow limiting plate is used to limit the flow.

[0007] Preferably, one end of each of the flow limiting plates does not contact the surface of the corresponding inlet head, the two mounting brackets are symmetrically mounted on the top of the housing, the telescopic end of each of the electric cylinders is movably sleeved inside the corresponding round hole on the corresponding mounting bracket, and a distance sensor is threadedly connected to the detection port on each of the mounting brackets.

[0008] Preferably, the outer shell is located at the top of the oil cylinder, the bottom of the outer shell has a pre-reserved drain port, a movable rod is movably sleeved at the through hole at the bottom of the inner wall of the outer shell, and a corrosion-resistant sealing ring is provided between the two, and the corrosion-resistant sealing ring is fixed on the outer shell. A flipper is installed on the top of the outer shell, and a placement shell is installed at the mounting end of the flipper.

[0009] Preferably, multiple auxiliary blocks are installed at both ends of the placement shell, and the lower side of each auxiliary block is in contact with the top of the outer shell. The interior of the placement shell is provided with a porous shell, and the top of the porous shell is installed with the top of the placement shell. A crystallizer is placed inside each square hole of the porous shell.

[0010] Preferably, the top of each crystallizer is installed with the top of the porous shell, and a detachable ingot head is movably sleeved inside each crystallizer. A base is installed on the top of the moving rod, and multiple detachable ingot heads are installed on the top of the base. A connector is installed on the bottom of the moving rod.

[0011] Preferably, the connector is threaded onto the telescopic end of the hydraulic cylinder, the distributor is disposed at the bottom of the placement shell, the distributor is located between the perforated plate and the placement shell, and multiple connecting brackets are fixed on the surface of the distributor, with each of the multiple connecting brackets being installed at the bottom of the placement shell.

[0012] Preferably, each of the inlet heads is movably fitted into the corresponding through hole of the distributor, each water outlet end of the distributor is connected to a nozzle, the fixed end surface of the oil cylinder is fixed with a perforated plate, and a distance measuring sensor is installed on the perforated plate.

[0013] Preferably, the perforated plate is provided with an auxiliary mechanism, which includes two guide pipes and a collection groove, the collection groove being pre-positioned on the top of the perforated plate.

[0014] Preferably, the inlet ends of both guide tubes are fixedly connected to the inside of the collection tank, and the outlet end of each guide tube is aligned with the inner wall of the outer shell.

[0015] A casting method for a direct-cooling semi-continuous casting apparatus for hard aluminum alloy flat ingots includes the following steps: S1. When casting hard aluminum alloy flat ingots, first use the oil cylinder, connector, moving rod and base to move the ingot head to the lower opening of the crystallizer. Then inject the aluminum alloy melt into the crystallizer and inject cold water into the crystallizer cavity to allow the aluminum alloy melt injected into the crystallizer to gradually form a solidified billet shell for the first cooling. S2. When the billet shell reaches the safe thickness, use the oil cylinder and distance sensor to move the ingot head down to the designated position. While the billet is moving, add hard aluminum alloy melt into the crystallizer. Then, let the aluminum alloy melt gradually generate a solidified billet shell. S3. At the same time, cold water is injected into the distributor. The injected cold water will be sprayed out from the nozzle and sprayed onto the surface of the billet in a direct spray manner to cool it a second time. At this time, the flow restriction plate will prevent too much cold water from reaching the edges and corners of the billet. S4. At the same time, start the electric cylinder again, and with the help of the distance sensor, make the perforated plate and all the components installed on it move back and forth. At this time, the moving cold water roller will adjust the slight bulging deformation on the surface of the billet, and then pass cold water to the cold water roller to cool down the billet in contact with the surface of the cold water roller again. S5. When the hard aluminum alloy flat ingot has completed the casting of the specified length, use the flipper to rotate the placement shell 180 degrees and stop. At the same time, reset the ingot head to its original position, and then move the cold water roller to the middle position of the entire hard aluminum alloy flat ingot. Then, use the prepared equipment to lift the entire hard aluminum alloy flat ingot out of the shell, thus completing the single casting of the hard aluminum alloy flat ingot.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by setting an adjustment mechanism, an electric cylinder, a perforated plate, a four-way pipe, a five-way pipe, and a two-way pipe are configured in combination to enable the cold water roller to move up and down reciprocally, thereby adjusting the slight bulging deformation on the surface of the billet and ensuring that the quality of the hard aluminum alloy produced is qualified. At the same time, with the help of a distance sensor, the cold water roller can be moved at a precise distance. Furthermore, with the help of a connecting pipe, cold water can be injected into the interior of each cold water roller, and the flowing cold water can be used to cool the surface of the billet.

[0017] 2. In this invention, by setting a flow-limiting plate, excessive cold water can be blocked from reaching the edges and corners of the billet, thereby reducing the bending and warping of the billet and helping to improve the quality of the hard aluminum alloy flat ingot.

[0018] 3. In this invention, by setting up an auxiliary mechanism, the collection tank and the guide pipe are set together to collect the water that splashes and falls from the surface of the casting directly sprayed by the nozzle, and guide it to the inner wall of the outer shell through the guide pipe. This helps to recover the water that has been lost or splashed, reduce water waste, and also helps to prevent the splashed water from affecting the surrounding parts. Attached Figure Description

[0019] Figure 1 This is a top-view partial cross-sectional perspective view of a hard aluminum alloy flat ingot direct cooling semi-continuous casting device according to the present invention. Figure 2 This is a schematic diagram of the casting mechanism of a direct-cooling semi-continuous casting device for hard aluminum alloy flat ingots, as shown in the front view of the present invention. Figure 3 This is a top view schematic diagram of the auxiliary mechanism of a direct cooling semi-continuous casting device for hard aluminum alloy flat ingots according to the present invention, including a perforated plate, an electric cylinder, and a mounting frame. Figure 4 This is a three-dimensional structural diagram of the adjustment mechanism of a direct cooling semi-continuous casting device for hard aluminum alloy flat ingots, including the placement shell, moving rod, guide pipe, connector, oil cylinder, and base, viewed from an upward angle. Figure 5 This is a top view structural diagram of a semi-continuous casting device for direct cooling of hard aluminum alloy flat ingots according to the present invention. Figure 6 This is a three-dimensional structural diagram of the flipper, placement shell, and auxiliary block of a direct-cooling semi-continuous casting device for hard aluminum alloy flat ingots according to the present invention. Figure 7 This is a three-dimensional structural diagram of the placement shell, crystallizer, ingot head and base of a direct cooling semi-continuous casting device for hard aluminum alloy flat ingots according to the present invention. Figure 8 This is a perspective view of the casting mechanism of a direct-cooling semi-continuous casting device for hard aluminum alloy flat ingots according to the present invention, taken from another angle. Figure 9 This is a top view schematic diagram of the flow-limiting plate and casting mechanism of a direct-cooling semi-continuous casting device for hard aluminum alloy flat ingots according to the present invention. Figure 10 This is a perspective view of a four-way pipe in a direct-cooling semi-continuous casting device for hard aluminum alloy flat ingots according to the present invention. Figure 11 This is a schematic diagram of the adjustment mechanism of a direct-cooling semi-continuous casting device for hard aluminum alloy flat ingots, viewed from below. Figure 12 This is a top-view cross-sectional view of the adjustment mechanism of a direct-cooling semi-continuous casting device for hard aluminum alloy flat ingots according to the present invention. Figure 13 This invention relates to a semi-continuous casting apparatus for direct cooling of hard aluminum alloy flat ingots. Figure 12 Enlarged 3D view of the structure at point A in the middle; Figure 14 This is a top-view perspective view of the casting mechanism of a direct-cooling semi-continuous casting device for hard aluminum alloy flat ingots according to the present invention.

[0020] In the picture: 1. Casting mechanism; 11. Hydraulic cylinder; 12. Housing; 13. Moving rod; 14. Tilter; 15. Placement shell; 16. Auxiliary block; 17. Perforated shell; 18. Crystallizer; 19. Ingot head; 110. Base; 111. Diverter; 112. Connecting frame; 113. Nozzle; 114. Perforated plate; 115. Distance sensor; 116. Connector; 2. Auxiliary mechanism; 21. Guide pipe; 22. Collection tank; 3. Adjustment mechanism; 31. Mounting frame; 32. Electric cylinder; 33. Perforated plate; 34. Four-way pipe; 35. Connecting pipe; 36. Cold water roller; 37. Five-way pipe; 38. Two-way pipe; 39. Sealing ring; 310. Distance sensor; 4. Flow limiting plate. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 14 The present invention provides a technical solution: A semi-continuous casting device for direct cooling of hard aluminum alloy flat ingots includes a casting mechanism 1, which includes a hydraulic cylinder 11, a housing 12 and a distributor 111. An adjustment mechanism 3 is provided inside the housing 12. The adjustment mechanism 3 includes two mounting brackets 31. Each mounting bracket 31 is equipped with a set of electric cylinders 32 on its top. A perforated plate 33 is installed between the telescopic ends of the multiple electric cylinders 32. Multiple four-way pipes 34, multiple five-way pipes 37 and multiple two-way pipes 38 are installed at the bottom of the perforated plate 33. Multiple connecting pipes 35 and multiple cold water rollers 36 are connected between the multiple four-way pipes 34, multiple five-way pipes 37 and multiple two-way pipes 38. A sealing ring 39 is provided inside each four-way pipe 34, the inside of each five-way pipe 37 and the inside of each two-way pipe 38. A flow limiting plate 4 is fixed at each corner of each through hole on the flow divider 111. The flow limiting plate 4 is used to limit the flow.

[0023] One end of each flow limiting plate 4 does not contact the surface of the corresponding inlet head 19. Two mounting brackets 31 are symmetrically mounted on the top of the housing 12. The outer wall of the housing 12 is provided with mounting blocks. The telescopic end of each electric cylinder 32 is movably sleeved inside the corresponding round hole on the corresponding mounting bracket 31. A distance sensor 310 is threadedly connected to the detection port on each mounting bracket 31.

[0024] By adopting the above technical solution, the hydraulic cylinder 11 serves as the power source for moving the dummy ingot head 19 to control whether it needs to enter the crystallizer 18. The outer casing 12 collects the water sprayed from the nozzles 113, which has already cooled the billet. The distributor 111 receives the injected cold water and distributes it to each nozzle 113. The mounting bracket 31 securely connects the electric cylinder 32 to the outer casing 12, ensuring stability during operation. The electric cylinder 32 serves as the power source for driving the perforated plate 33 to move. The perforated plate 33 is used for... The four-way pipe 34, five-way pipe 37, and two-way pipe 38 are provided with installation positions to ensure that the connecting pipe 35 and the cooling water roller 36 are fixed on the perforated plate 33. The four-way pipe 34 is used to connect the connecting pipe 35 and the cooling water roller 36. The connecting pipe 35 is used for cooling water transportation. When the cooling water roller 36 moves, it can be used to adjust the slight bulging deformation on the surface of the billet, thereby ensuring that the quality of the hard aluminum alloy flat ingot is qualified. The connecting pipe 38 is used to connect the connecting pipe 35 and the cooling water roller 36. The sealing ring 39 is used to seal the connection between the connecting pipe 35 and the four-way pipe 34, and also to connect the connecting pipe 35 and the five-way pipe 37. The sealing is used for the connection between the cooling water roller 36 and the four-way pipe 34, the connection between the cooling water roller 36 and the five-way pipe 37, the connection between the connecting pipe 35 and the two-way pipe 38, and the connection between the cooling water roller 36 and the two-way pipe 38. The distance sensor 310 is used to measure the moving distance of the perforated plate 33. The flow limiting plate 4 is used to limit the flow of cooling water contacting the corners of the billet, thereby avoiding excessive rapid cooling of the corners of the billet and reducing the warping of the billet. When the billet completes the secondary cooling and moves down to the required set distance, the electric cylinder 32 first provides... The driving force causes the perforated plate 33 to move, which in turn causes the four-way pipe 34, five-way pipe 37 and two-way pipe 38 fixed on it to move synchronously. At this time, the sealing ring 39, the connecting pipe 35 and the cooling water roller 36 will also move synchronously. Then, cold water is injected into the cooling pipe composed of the four-way pipe 34, five-way pipe 37, connecting pipe 35, two-way pipe 38, sealing ring 39 and cooling water roller 36. This allows the heat on the billet in contact with the surface of the cooling water roller 36 to be carried away. At the same time, the moving cooling water roller 36 can also adjust the slight bulging deformation on the surface of the billet, thereby ensuring the quality of the obtained hard aluminum alloy flat ingot.

[0025] Specifically, such as Figure 2 , Figures 4-9 and Figure 14 As shown, the outer shell 12 is located on top of the oil cylinder 11. A drain port is reserved at the bottom of the outer shell 12. A moving rod 13 is movably sleeved at the through hole at the bottom of the inner wall of the outer shell 12, and a corrosion-resistant sealing ring is provided between the two. The corrosion-resistant sealing ring is fixed on the outer shell 12. A flipper 14 is installed on the top of the outer shell 12, and a placement shell 15 is installed at the mounting end of the flipper 14.

[0026] Multiple auxiliary blocks 16 are installed at both ends of the placement shell 15, and the lower side of each auxiliary block 16 is in contact with the top of the outer shell 12. A porous shell 17 is provided inside the placement shell 15, and the top of the porous shell 17 is installed with the top of the placement shell 15. A crystallizer 18 is placed inside each square hole of the porous shell 17. The crystallizer 18 is provided with a cavity and a cold water inlet and outlet.

[0027] The top of each crystallizer 18 is installed with the top of the porous shell 17. Each crystallizer 18 has a movably sleeved insulator head 19. The top of the moving rod 13 is equipped with a base 110. Multiple insulator heads 19 are installed on the top of the base 110. The bottom of the moving rod 13 is equipped with a connector 116.

[0028] The connector 116 is threaded onto the telescopic end of the cylinder 11. The distributor 111 is located at the bottom of the housing 15. The distributor 111 is located between the perforated plate 33 and the housing 15. Multiple connecting brackets 112 are fixed on the surface of the distributor 111. All multiple connecting brackets 112 are installed at the bottom of the housing 15.

[0029] Each inlet head 19 is movably sleeved inside the corresponding through hole on the distributor 111. Each water outlet end of the distributor 111 is connected to a nozzle 113. A perforated plate 114 is fixed on the fixed end surface of the cylinder 11, and a distance sensor 115 is installed on the perforated plate 114.

[0030] By adopting the above technical solution, the moving rod 13 is used to connect the connector 116 and the base 110, which can prevent the extension end of the hydraulic cylinder 11 from entering the interior of the outer shell 12, thereby preventing the water sprayed from the nozzle 113 from washing away the lubricating oil on the surface of the extension end of the hydraulic cylinder 11, which helps to improve the service life of the hydraulic cylinder 11. The flipper 14 is used to move the placement shell 15 to a new position, which facilitates the removal of the whole hard aluminum alloy flat ingot cast inside the outer shell 12 later. The placement shell 15 is used to provide an installation position for the porous shell 17, which can ensure the stability of the crystallizer 18 installed on the porous plate 17 during operation. The auxiliary block 16 is used to provide support for the placement shell 15. The support, used in conjunction with the flipper 14, improves the stability of the placement shell 15 during use. The porous shell 17 provides installation positions for multiple crystallizers 18. The cold water flowing inside the cavity of the crystallizer 18 can be used for the initial cooling of the aluminum molten metal injected into the crystallizer 18. The dummy head 19 is used to seal the lower opening of the crystallizer 18 and can move the billet during movement. The base 110 is used to install the dummy head 19. The distributor 111 is used to distribute the injected cold water into each nozzle 113. The connecting bracket 112 is used to fix the distributor 111 to the placement shell 15. The perforated plate 114 is used to mount the distance sensor 11. 5 is fixed on the hydraulic cylinder 11. The distance sensor 115 is used to measure the moving distance of the ingot head 19. The connector 116 is used to connect the moving rod 13 and the hydraulic cylinder 11. When casting hard aluminum alloy flat ingots, the power source provided by the hydraulic cylinder 11 first drives the connector 116 to move its position. Then, by using the moving rod 13 connected to it and the base 110, the ingot head 19 can be moved until it moves to the lower opening of the crystallizer 18. Then, aluminum melt is injected into the crystallizer 18, and cold water is injected into the cavity of the crystallizer 18. This allows the aluminum melt to gradually form a solidified billet shell (first cooling). When the safe thickness is reached, the hydraulic cylinder 11 is used to move the ingot head 19 down to a designated position (measured by the distance sensor 115). During the movement, the ingot head 19 is transported to the nozzle 113 by the distributor 111 and cooled a second time by the cold water sprayed from the nozzle 113. At the same time, hard aluminum alloy melt is added to the crystallizer 18. This process is repeated to complete the vertical casting operation of hard aluminum alloy flat ingots of the required length. When the hard aluminum alloy flat ingot is finished casting, the flipper 14 is used to move the placement shell 15 and the components fixed on it so that the hard aluminum alloy flat ingots of the required length can be removed from the shell 12 by the equipment later.

[0031] Specifically, such as Figure 4 As shown, an auxiliary mechanism 2 is provided on the perforated plate 33. The auxiliary mechanism 2 includes two guide pipes 21 and a collection groove 22. The collection groove 22 is preset on the top of the perforated plate 33.

[0032] The inlet ends of both guide pipes 21 are fixedly connected to the inside of the collection tank 22, and the outlet end of each guide pipe 21 is aligned with the inner wall of the outer shell 12.

[0033] By adopting the above technical solution, the guide pipe 21 is used to guide the water collected inside the collection tank 22 to the inner wall of the outer shell 12. The collection tank 22 is used to collect the water that is sprayed directly onto the surface of the billet by the nozzle 113 and splashes away, which helps to collect wastewater in a concentrated manner and at the same time avoids the splashed water from affecting the surrounding parts. When the nozzle 113 sprays cold water directly onto the surface of the billet, some water will splash away from the surface of the billet. At this time, by using the collection tank 22, the water that falls after splashing can be collected. Then, by using the guide pipe 21, the water inside the collection tank 22 can be guided to the inner wall of the outer shell 12, which helps to recover the lost and splashed water, reduce water waste, and also avoid disorderly splashing and scattering of water, which helps to prevent the splashed water from affecting the surrounding parts.

[0034] Detailed implementation: First, the entire vertical casting direct cooling semi-continuous casting device is installed in the casting area of ​​the vertical semi-continuous casting system by cooperating with the outer shell 12 and the oil cylinder 11. Then, the oil cylinder 11 is started, which drives the connector 116 to move upward. Then, the moving connector 116 will drive the moving rod 13 to move. When the moving rod 13 moves, the base 110 connected to it will move. The moving base 110 will drive the dummy head 19 to move upward. When the dummy head 19 moves upward into the crystallizer 18 and blocks the lower opening of the crystallizer 18, the movement of the dummy head 19 is stopped. Then, cold water is injected into the cavity inside the crystallizer 18 through the cold water inlet (first cooling). Then, the injected water is discharged from the outlet of the crystallizer 18 and this state is maintained. When the molten aluminum alloy is smoothly injected into each crystallizer 18 through the flow channel, filter, and distributor plate, the injected melt is cooled by the flowing cold water inside the crystallizer 18, allowing the melt inside the crystallizer 18 to gradually form a solidified billet shell (the safe thickness of the billet shell of the aluminum alloy flat ingot is controlled at 8-15mm, calculated using the thermocouple back-calculation method). During this stage, it is necessary to keep the dummy ingot head 19 stationary and maintain the liquid level in the crystallizer 18 at the process-set liquid level height (measured using an eddy current level sensor). When the billet shell of the aluminum alloy flat ingot reaches the safe thickness, the hydraulic cylinder 11 is activated to move the dummy ingot head 19 downwards at a uniform speed according to the set casting speed. When the bottom end of the aluminum alloy billet with a stable billet shell moves out of the crystallizer 18, it is then directed to the distributor plate. Cold water is injected into the inside of the device 111. The injected cold water will then be diverted into the inside of each nozzle 113 and sprayed directly onto the outer surface of the moving billet to cool it (secondary cooling). At this time, the sprayed cold water will be limited by the flow limiting plate 4 to prevent excessive cold water from reaching the edges and corners of the billet. The cold water will carry away most of the latent heat of solidification on the billet. During this process, the billet continues to solidify from the outside to the inside, gradually consuming the internal liquid core. When the billet moves down to the required set distance through the cooperation of the distance sensor 115 and the connector 116, the movement of the billet position is paused. Then, hard aluminum alloy melt is added into the crystallizer 18 and the liquid level inside the crystallizer 18 is kept constant. When the thickness of the injected melt billet shell reaches the safe thickness, the billet is moved down again, and the moving billet is cooled a second time. When the billet completes secondary cooling and moves down to the required set distance, all electric cylinders 32 are activated simultaneously, and cold water is injected into the cooling pipe consisting of a four-way pipe 34, a five-way pipe 37, a connecting pipe 35, a two-way pipe 38, a sealing ring 39, and a cold water roller 36. At this time, the activated electric cylinders 32 will drive the perforated plate 33, the guide pipe 21, and the cooling pipe to move up and down synchronously. The distance of the reciprocating movement is controlled by the distance sensor 310. At this time, the surface of the cold water roller 36 moving up and down will move in contact with the surface of the billet to adjust the slight bulging deformation on the surface of the billet (at this time, the inner wall of the through hole on the perforated plate 33 is not in contact with the surface of the billet). At the same time, the cooling flowing inside the cooling pipe will also remove the heat from the billet. Meanwhile, the water splashed directly onto the surface of the billet will fall into the inside of the collection tank 22, and then be guided to the inner wall of the outer shell 12 through the guide pipe 21. Then the water will slide down the inner wall of the outer shell 12 to the bottom of the inner wall of the outer shell 12, and finally be discharged from the drain port at the bottom of the outer shell 12. When the hard aluminum alloy flat ingot reaches the target length, the supply of aluminum melt to the crystallizer 18 is stopped. After the remaining melt has solidified and deformed, the ingot head 19 is moved back to the initial position using the hydraulic cylinder 11. At the same time, the injection of cold water into the crystallizer 18 and the distributor 111 is stopped, thus completing the vertical casting. Then, the electric cylinder 32 and the distance sensor 310 are used to move the cold water roller 36 to the middle position of the entire hard aluminum alloy flat ingot. At the same time, the injection of cold water into the cooling pipe is stopped. Then, the flipper 14 is started, so that the placement shell 15 and the components installed on it rotate simultaneously. When the placement shell 15 has completed a 180-degree rotation, the rotation of the placement shell 15 is stopped. Then, multiple hard aluminum alloy flat ingots are lifted out in sequence, thus completing the single casting of hard aluminum alloy flat ingots.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A semi-continuous casting apparatus for direct cooling of hard aluminum alloy flat ingots, comprising a casting mechanism (1), characterized in that: The casting mechanism (1) includes a hydraulic cylinder (11), a housing (12) and a distributor (111), and an adjustment mechanism (3) is provided inside the housing (12). The adjustment mechanism (3) includes two mounting brackets (31). Each mounting bracket (31) is equipped with a set of electric cylinders (32) at its top. A perforated plate (33) is installed between the telescopic ends of the multiple electric cylinders (32). Multiple four-way pipes (34), multiple five-way pipes (37), and multiple two-way pipes (38) are installed at the bottom of the perforated plate (33). Multiple connecting pipes (35) and multiple cold water rollers (36) are connected between the multiple four-way pipes (34), multiple five-way pipes (37), and multiple two-way pipes (38). A sealing ring (39) is provided inside each four-way pipe (34), the five-way pipe (37), and the two-way pipe (38). A flow limiting plate (4) is fixed at each included angle of each through hole on the flow divider (111), and the flow limiting plate (4) is used to limit the flow.

2. The semi-continuous casting apparatus for direct cooling of hard aluminum alloy flat ingots according to claim 1, characterized in that: One end of each of the flow limiting plates (4) does not contact the surface of the corresponding inlet head (19). The two mounting brackets (31) are symmetrically mounted on the top of the outer shell (12). The telescopic end of each of the electric cylinders (32) is movably sleeved inside the corresponding round hole on the corresponding mounting bracket (31). A distance sensor (310) is threadedly connected to the detection port on each of the mounting brackets (31).

3. The semi-continuous casting apparatus for direct cooling of hard aluminum alloy flat ingots according to claim 2, characterized in that: The outer shell (12) is located on top of the oil cylinder (11). A drain port is reserved at the bottom of the outer shell (12). A moving rod (13) is movably sleeved at the through hole at the bottom of the inner wall of the outer shell (12), and a corrosion-resistant sealing ring is provided between the two. The corrosion-resistant sealing ring is fixed on the outer shell (12). A flipper (14) is installed on the top of the outer shell (12), and a placement shell (15) is installed at the mounting end of the flipper (14).

4. The semi-continuous casting apparatus for direct cooling of hard aluminum alloy flat ingots according to claim 3, characterized in that: Multiple auxiliary blocks (16) are installed at both ends of the placement shell (15), and the lower side of each auxiliary block (16) is in contact with the top of the outer shell (12). A porous shell (17) is provided inside the placement shell (15), and the top of the porous shell (17) is installed with the top of the placement shell (15). A crystallizer (18) is placed inside each square hole of the porous shell (17).

5. The semi-continuous casting apparatus for direct cooling of hard aluminum alloy flat ingots according to claim 4, characterized in that: The top of each crystallizer (18) is installed with the top of the porous shell (17). Each crystallizer (18) has a movably fitted spindle head (19) inside. The top of the moving rod (13) is fitted with a base (110). Multiple spindle heads (19) are fitted on the top of the base (110). The bottom of the moving rod (13) is fitted with a connector (116).

6. The semi-continuous casting apparatus for direct cooling of hard aluminum alloy flat ingots according to claim 5, characterized in that: The connector (116) is threaded onto the telescopic end of the cylinder (11). The diverter (111) is located at the bottom of the housing (15). The diverter (111) is located between the perforated plate (33) and the housing (15). Multiple connecting brackets (112) are fixed on the surface of the diverter (111). All of the multiple connecting brackets (112) are installed at the bottom of the housing (15).

7. The semi-continuous casting apparatus for direct cooling of hard aluminum alloy flat ingots according to claim 6, characterized in that: Each of the inlet heads (19) is movably sleeved inside the corresponding through hole on the distributor (111). Each water outlet end of the distributor (111) is connected to a nozzle (113). A perforated plate (114) is fixed on the fixed end surface of the cylinder (11). A distance sensor (115) is installed on the perforated plate (114).

8. The semi-continuous casting apparatus for direct cooling of hard aluminum alloy flat ingots according to claim 7, characterized in that: An auxiliary mechanism (2) is provided on the perforated plate (33). The auxiliary mechanism (2) includes two guide pipes (21) and a collection groove (22). The collection groove (22) is preset on the top of the perforated plate (33).

9. The semi-continuous casting apparatus for direct cooling of hard aluminum alloy flat ingots according to claim 8, characterized in that: The inlet ends of both of the guide pipes (21) are fixedly connected to the inside of the collection tank (22), and the outlet end of each guide pipe (21) is aligned with the inner wall of the outer shell (12).

10. A casting method for a direct-cooling semi-continuous casting device for hard aluminum alloy flat ingots, characterized in that, The method using the direct cooling semi-continuous casting apparatus for hard aluminum alloy flat ingots as described in claim 9 includes the following steps: S1. When it is necessary to cast hard aluminum alloy flat ingots, first use the oil cylinder (11), connector (116), moving rod (13) and base (110) to move the ingot head (19) to the lower opening of the crystallizer (18), then inject the aluminum alloy melt into the crystallizer (18) and inject cold water into the cavity of the crystallizer (18) so that the aluminum alloy melt injected into the crystallizer (18) gradually generates a solidified billet shell for the first cooling. S2. When the billet shell reaches the safe thickness, the oil cylinder (11) and the distance sensor (115) are used to move the ingot head (19) down to the designated position. When the billet moves, hard aluminum alloy melt is added to the inside of the crystallizer (18). Then the aluminum alloy melt is gradually generated into a solidified billet shell. S3. At the same time, cold water is injected into the distributor (111). The injected cold water will be sprayed out from the nozzle (113) and sprayed onto the surface of the billet in a direct spray manner to cool it a second time. At this time, the flow restriction plate (4) will block too much cold water from reaching the corners of the billet. S4. At the same time, start the electric cylinder (32) again, and with the cooperation of the distance sensor (310), make the perforated plate (33) and all the components installed on it move back and forth. At this time, the moving cold water roller (36) will adjust the small bulging deformation on the surface of the billet, and then pass cold water through the cold water roller (36) to cool down the billet that is in contact with the surface of the cold water roller (36) again. S5. When the hard aluminum alloy flat ingot is cast to the specified length, the placement shell (15) is rotated 180 degrees and stopped by the flipper (14). At the same time, the ingot head (19) is reset to its original position. Then the cold water roller (36) is moved to the middle position of the whole hard aluminum alloy flat ingot. Then the prepared equipment is used to lift the whole hard aluminum alloy flat ingot out of the shell (12), thus completing the single casting of the hard aluminum alloy flat ingot.

Images