Vacuum rapid condensing furnace integrating control, quenching and polishing

Abstract

The application discloses a vacuum rapid condensing furnace integrating regulation and control of rapid cooling and polishing, which comprises a furnace body, a vacuum subsystem connected to the furnace body, an induction melting crucible, a rapid cooling copper roller, a tundish, a flow baffle and a rough cooling turntable arranged in the furnace body, a sleeve horizontally arranged on the inner wall of the furnace body and located above the rough cooling turntable, a first motor arranged on the outer wall of the furnace body, the rapid cooling copper roller located directly below the tundish, the tundish located on the side of the induction melting crucible, the flow baffle arranged between the induction melting crucible and the tundish, the rough cooling turntable rotatably arranged directly below the rapid cooling copper roller, the rough cooling turntable connected to a second motor arranged at the bottom of the furnace body, an extendable polishing structure arranged on the inner wall of the furnace body, and an adjustable fine cooling mechanism arranged below the rough cooling turntable and used for recooling the materials in the rough cooling turntable. The application is used to regulate and control the cooling speed of alloy sheets, so that the alloy sheets can rapidly complete the cooling at a cooling speed suitable for the preparation of high-performance materials, and the agglomeration and caking of the alloy sheets can be avoided. Meanwhile, the rapid cooling copper roller can be automatically polished.

Description

Technical Field

[0001] This invention relates to the field of vacuum rapid condensation furnace technology, specifically to a vacuum rapid condensation furnace that integrates controlled rapid cooling and polishing. Background Technology

[0002] Vacuum rapid solidification furnaces are currently the main equipment for producing NdFeB rare earth permanent magnet alloys and rare earth hydrogen storage alloys. They mainly include an integrated control subsystem, a vacuum subsystem, a vacuum furnace body, an induction melting crucible, an tundish, quenching copper rollers, and a cooling plate. The main working principle is as follows: the integrated control subsystem controls the vacuum subsystem to create a vacuum environment inside the furnace. Medium-frequency induction heating is used to melt the metal and alloy materials, which are then poured into the tundish. The melt then flows through the tundish to the quenching copper rollers, where it undergoes rapid cooling. This causes columnar crystal formation at the microscopic level and solidification into thin sheets at the macroscopic level. The sheets then fall into the cooling plate below for further cooling. Traditional vacuum rapid solidification furnaces suffer from relatively slow and uncontrolled cooling rates during the material preparation process into thin sheets. The microscopic columnar crystal texture of the cast rapid solidification alloy sheets is not ideal; the penetration of the main phase grains on the free surface and copper wheel surface, the internuclear spacing, and the width of the columnar crystals do not fully meet the technological requirements. Since the rapidly cooled cast sheets reach approximately 700°C, they easily adhere together in the receiving device, forming agglomerates and lumps. Products made from these sheets, such as Nd-Fe-B permanent magnets and hydrogen storage alloys, exhibit relatively low performance. Furthermore, the surface finish of the rapid-cooling copper roller deteriorates over long-term use, directly affecting the grain elongation, crystallization state, and solidified appearance and shape of the alloy material, thus impacting the performance of the rapid-solidification alloy. Currently, the surface polishing of the rapid-cooling copper rollers relies on manual grinding, resulting in uneven finish and low efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a vacuum rapid solidification furnace that integrates controlled rapid cooling and polishing. This furnace controls the cooling rate of the cast sheet within the coarse cooling turntable, enabling the rapid solidification casting to quickly achieve the cooling rate characteristics suitable for high-performance material preparation. This maximizes the ideal main phase grain size and the reasonable distribution of other phases, avoiding agglomeration and clumping, achieving grain adjustment, and improving the performance of products made from this sheet. Simultaneously, it can automatically polish the rapidly cooled copper rollers, resulting in a more uniform surface finish and higher polishing efficiency.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0005] A vacuum rapid solidification furnace integrating controlled quenching and polishing includes a furnace body connected to a vacuum subsystem. The furnace body contains an induction melting crucible, a quenching copper roller, an tundish, a baffle plate, and a coarse cooling turntable. A sleeve is horizontally positioned above the coarse cooling turntable on the inner wall of the furnace body. A first motor is mounted on the outer wall of the furnace body, with its output end passing through the sleeve and connected to one end of the quenching copper roller. The quenching copper roller is located directly below the tundish, which is situated on the side of the induction melting crucible. The baffle plate is positioned between the induction melting crucible and the tundish, with the tundish outlet facing the surface of the quenching copper roller. The coarse cooling turntable is rotatably positioned directly below the quenching copper roller and connected to a second motor at the bottom of the furnace body. A telescopic polishing structure corresponding to the quenching copper roller is mounted on the inner wall of the furnace body. Below the coarse cooling turntable is a controllable fine cooling mechanism for further cooling the material inside the turntable to improve its microstructure.

[0006] Using the above technical solution, the induction heating coils wrapped around the induction melting crucible heat the crucible, causing the internal alloy material to melt and form molten material. Adjusting the angle of the induction melting crucible directs the molten material towards the tundish. Baffles prevent the molten material from rushing forward during casting. The quenching copper roller rotates at a certain angular velocity, creating the linear velocity required for rapid cooling on its surface. When the molten material in the tundish contacts the surface of the quenching copper roller, the circulating cooling medium inside the roller rapidly cools the flowing alloy molten material, causing it to solidify and crystallize into alloy flakes. The first motor rotates the quenching copper roller, throwing the formed alloy flakes into the coarse cooling turntable. The second motor rotates the coarse cooling turntable. Once the material flakes reach a certain temperature in the coarse cooling turntable, they are broken into fine fragments by the stirring rod. These fine fragments enter the lower coarse cooling turntable through the drain holes. An adjustable fine cooling mechanism with a rotational speed difference further cools the alloy sheets coming off the coarse cooling turntable, thereby achieving controlled cooling to the set temperature. This allows for rapid and controlled cooling of the aggregated alloy sheet pile, enabling it to quickly and completely regulate crystallization and solidification, avoiding agglomeration and clumping. Products made from these alloy sheets meet the quality requirements for high-performance rare earth alloy preparation. Simultaneously, after prolonged use, the telescopic polishing mechanism on the furnace inner wall, combined with the rotation of the copper roller, automatically polishes the copper roller. Compared to manual polishing, mechanical polishing is less likely to cause unevenness on the polished surface, resulting in a more uniform finish. This effectively avoids the risk of elliptical deformation of the copper roller caused by improper long-term polishing. Mechanical polishing is time-saving, labor-saving, and highly efficient.

[0007] Optionally, the telescopic polishing mechanism includes a base, an annular bracket, a cylinder, and sandpaper. The base is fixed on the inner wall of the furnace body opposite the quenching copper rollers. The cylinder is fixed on the side of the base. The output end of the cylinder is connected to the annular bracket through a support rod. The inner ring of the annular bracket allows the quenching copper rollers to pass through. The sandpaper is fitted onto the inner ring of the annular bracket.

[0008] Optionally, a matching air bladder is provided between the sandpaper and the inner wall of the annular support, and the air bladder is filled with compressed air or pressurized inert gas.

[0009] Optionally, the edge of the sandpaper is fixed to the side of the annular bracket by screws.

[0010] Optionally, the length of the support rod is greater than the length of the quenching copper roller and there are multiple support rods. The multiple support rods are evenly distributed in a ring around the circumference of the ring support. The ends of the multiple support rods away from the ring support are connected to a connecting plate, and the middle of the connecting plate is connected to the cylinder output end.

[0011] Optionally, the adjustable fine cooling mechanism includes a fine cooling turntable located below the coarse cooling turntable. The top of the fine cooling turntable is open and does not contact the bottom surface of the coarse cooling turntable. A valve for controlling the flow of cooling water is provided on the side wall of the fine cooling turntable. Several cold heads are distributed in a concentric ring at the bottom of the fine cooling turntable. The inside of the cold head has an inlet channel and an outlet channel formed by a partition. The cold head is connected to an external water supply pipe through a pipe. The output end of the second motor passes through the bottom of the fine cooling turntable and is connected to the coarse cooling turntable.

[0012] Optionally, the sleeve has multiple vertically downward stirring rods on its side, which are spaced apart along the length of the sleeve. The lower end of each stirring rod has a stirring block, and the two together form an L-shape. The stirring block has a sharp end, and the sharp end is opposite to the circumferential tangent direction of the coarse cooling turntable.

[0013] Optionally, the stirring block is formed by welding two triangular blocks together at an incline to form an arrowhead structure, and the bottom surface of the stirring block is inverted V shape.

[0014] Optionally, both of the triangular blocks have cavities and the two cavities are connected. One of the triangular blocks has a water inlet at its tail end that is connected to its cavity, and the other triangular block has a water outlet at its tail end that is connected to its cavity. The water inlet is connected to an external water supply pipe through a pipe, and the water outlet is connected to a fine cooling turntable through a pipe.

[0015] Optionally, a booster pump is provided on the water supply pipe.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. In this invention, the cooling rate of the alloy sheet in the coarse cooling turntable and the fine cooling turntable is controlled so that the rapid solidification casting can quickly complete the cooling rate characteristics suitable for the preparation of high-performance materials, maximize the formation of ideal main phase grain size and reasonable distribution of other phases, avoid agglomeration and clumping, improve the performance of products made from this sheet, and can also automatically grind and polish the rapid cooling copper roller, so that the polishing surface is more uniform and the polishing efficiency is also high.

[0018] 2. A stirring rod is fixed at the lower end of the sleeve, and a stirring block is connected to the lower end of the stirring rod. The two are in an L-shaped structure. The sharp end of the stirring block is opposite to the tangent direction of the rotating circumference of the coarse cooling turntable. As the coarse cooling turntable rotates continuously, the stirring block can stir the alloy sheet in the coarse cooling turntable, further avoiding the occurrence of agglomeration and clumping. At the same time, it can further accelerate the cooling rate of the alloy sheet, which is beneficial to improving its quality.

[0019] 3. The stirring block has a hollow structure. When the alloy sheet is stirred and turned, cooling water is introduced into the stirring block through the water inlet, which can further accelerate the cooling rate of the alloy sheet, allowing it to solidify quickly and reduce its grain size. Products made from this alloy sheet will have better performance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the side structure of the present invention;

[0022] Figure 3 This is a schematic diagram showing the distribution structure of the cold head located on the bottom surface of the precision cooling turntable;

[0023] Figure 4 This is an assembly structure diagram of sandpaper, a ring-shaped support, and an airbag.

[0024] Figure 5 This is an assembly structure diagram of the stirring rod and stirring block;

[0025] Figure 6 Here is a structural diagram of a grinding wheel;

[0026] Figure 7 This is a schematic diagram of the assembly of the grinding wheel and the ring support;

[0027] Figure 8 This is a diagram showing the distribution of material discharge ports on the coarse cooling turntable.

[0028] Reference numerals: 1-furnace body, 2-sleeve, 3-quenching copper roller, 4-intermediate ladle, 5-induction melting crucible, 6-ring support, 7-support rod, 8-connecting plate, 9-cylinder, 10-base, 11-coarse cooling turntable, 12-cold head, 13-fine cooling turntable, 14-second motor, 15-stirring rod, 16-stirring block, 17-vacuum subsystem, 18-first motor, 19-baffle plate, 20-induction heating coil, 21-triangular block, 22-inlet, 23-outlet, 24-airbag, 25-sandpaper, 26-grinding wheel, 27-discharge port. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "longitudinal," "lateral," "horizontal," "inner," "outer," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Example 1

[0033] A vacuum rapid solidification furnace integrating controlled quenching and polishing includes a furnace body 1 connected to a vacuum subsystem 17. The furnace body 1 contains an induction melting crucible 5, a quenching copper roller 3, an tundish 4, a baffle plate 19, and a coarse cooling turntable 11. A sleeve 2 is transversely arranged on the inner wall of the furnace body 1 above the coarse cooling turntable 11. A first motor 18 is located on the outer wall of the furnace body 1. The output end of the first motor 18 passes through the sleeve 2 and is connected to one end of the quenching copper roller 3, which is located directly below the tundish 4. The intermediate ladle 4 is located on the side of the induction melting crucible 5. The baffle plate 19 is set between the induction melting crucible 5 and the intermediate ladle 4. The outlet of the intermediate ladle 4 faces the surface of the quenching copper roller 3. The coarse cooling turntable 11 is rotatably set directly below the quenching copper roller 3. The coarse cooling turntable 11 is connected to the second motor 14 at the bottom of the furnace body 1. The inner wall of the furnace body 1 is provided with a telescopic polishing structure corresponding to the quenching copper roller 3. Below the coarse cooling turntable 11 is an adjustable fine cooling mechanism for further cooling the material inside the coarse cooling turntable 11.

[0034] In this embodiment, as Figure 1 and 2As shown, alloy material is added to the induction melting crucible 5, the furnace body 1 is sealed, and the vacuum subsystem 17 is activated. The vacuum subsystem 17 creates a vacuum state or protective atmosphere inside the furnace body 1. An induction heating coil 20 is wound around the induction melting crucible 5, which is the same principle as the existing vacuum rapid solidification furnace. After being powered on, the induction heating coil 20 begins to heat up. Under medium-frequency induction, the alloy material in the induction melting crucible 5 is heated and melted to form a molten liquid. The angle of the induction melting crucible 5 is adjusted to make the molten liquid flow towards the tundish 4. The baffle plate 19 can prevent the flow of the molten liquid. During the casting process, the molten metal in the induction melting crucible 5 rushes forward, and the quenching copper roller 3 rotates at a certain linear speed. After the molten metal in the tundish 4 comes into contact with the surface of the quenching copper roller 3, a circulating cooling medium flows through the quenching copper roller 3, causing the alloy molten metal flowing out of the tundish 4 to cool rapidly and solidify into alloy flakes. The first motor 18 actuates to make the quenching copper roller 3 rotate in the forward or reverse direction and throw the formed alloy flakes into the coarse cooling turntable 11 for cooling. The rotation speed of the quenching copper roller 3 is adjustable. The second motor 14 rotates to drive the coarse cooling turntable 11. As the coarse cooling turntable 11 rotates, it conveys the cooled alloy sheet from the discharge port 27 to the adjustable fine cooling mechanism below. The adjustable fine cooling mechanism below the coarse cooling turntable 11 then further cools the alloy sheet inside the coarse cooling turntable 11, thereby achieving rapid cooling to the ideal value. This is used to control the cooling rate of the alloy sheet, enabling the rapid solidification casting to quickly complete the cooling rate characteristics suitable for the preparation of high-performance materials, maximizing the formation of ideal main phase grain size and reasonable distribution of other phases, and avoiding agglomeration. This method reduces clumping and improves the performance of products made from this thin sheet. Furthermore, after prolonged use, the telescopic polishing mechanism on the inner wall of the furnace body 1, combined with the rotation of the telescopic copper roller 3, automatically polishes the roller. Compared to manual polishing, mechanical polishing is less likely to cause unevenness on the polished surface, resulting in a more uniform finish. This effectively avoids the risk of elliptical deformation caused by improper long-term polishing. Mechanical polishing is time-saving, labor-saving, and highly efficient.

[0035] Example 2

[0036] Furthermore, the telescopic polishing mechanism includes a base 10, an annular bracket 6, a cylinder 9, and sandpaper 25. The base 10 is fixed on the inner wall of the furnace body 1 opposite to the quenching copper roller 3. The cylinder 9 is fixed on the side of the base 10. The output end of the cylinder 9 is connected to the annular bracket 6 through a support rod 7. The inner ring of the annular bracket 6 allows the quenching copper roller 3 to pass through. The sandpaper 25 is adapted to fit on the inner ring of the annular bracket 6.

[0037] In this embodiment, as Figure 1 and 4As shown, the telescopic polishing mechanism mainly consists of a base 10, an annular bracket 6, a cylinder 9, and sandpaper 25. The base 10 is welded or bolted to the inner wall of the furnace body 1, opposite to the quenching copper roller 3. The tail end of the cylinder 9 is bolted to the side of the base 10. The cylinder 9 is horizontally positioned, and its output end coincides with the axis of the quenching copper roller 3. The output end of the cylinder 9 is connected to a support rod 7, and the left end of the support rod 7 is connected to the annular bracket 6. The inner circle of the annular bracket 6 is large enough to allow the quenching copper roller 3 to pass through. The sandpaper 25 is attached to the inner side of the annular bracket 6, with its working surface facing the surface of the quenching copper roller 3. When it is necessary to polish the surface of the quenching copper roller 3, if the distance between the intermediate tundish 4 and the quenching copper roller 3 is too short, the intermediate tundish 4 can be removed first. Alternatively, the cylinder can be moved without stopping the rotation of the rapid cooling copper roller 3. The rotation speed can be slowed down, and the output end of the cylinder 9 extends, bringing the annular support 6 close to the end of the rapid cooling copper roller 3 until the annular support 6 is fitted onto the rapid cooling copper roller 3. The cylinder 9 then slowly extends laterally, and the sandpaper 25 on its inner wall can polish the surface of the rapid cooling copper roller 3. The cylinder 9 reciprocates laterally multiple times to achieve the polishing operation of the rapid cooling copper roller 3. The entire process does not require manual polishing. Mechanical polishing is less likely to cause unevenness on the polished surface, and the polishing finish is more uniform. This ensures the consistency and uniformity of the rapid cooling copper roller 3 during polishing and avoids the risk of elliptical deformation caused by improper long-term polishing. Mechanical polishing saves time and effort and has high polishing efficiency.

[0038] Furthermore, a matching air bladder 24 is provided between the sandpaper 25 and the inner wall of the annular support 6. The air bladder 24 is filled with compressed air or pressurized inert gas. Specifically, an air bladder 24 is sandwiched between the sandpaper 25 and the inner wall of the annular support 6. The air bladder 24 is also annular and is fixed to the inner ring of the annular support 6 by adhesive. An appropriate amount of compressed air or pressurized inert gas is filled into the air bladder 24. The air bladder 24 can change the adhesion between the sandpaper 25 and the surface of the rapid cooling copper roller 3. At the same time, by changing the volume of the air bladder 24 itself, the diameter of the inner ring formed by the sandpaper 25 can be changed. In this way, rapid cooling copper rollers 3 of different diameters can be polished. The amount of air in the air bladder 24 can achieve different requirements for polishing and polishing of the rapid cooling copper roller 3.

[0039] It should be noted that, as Figure 6 and 7 As shown, sandpaper 25 can be replaced by an annular grinding wheel 26. After the grinding wheel 26 is installed and fixed in the annular bracket 6, the inner ring diameter of the grinding wheel 26 matches the diameter of the quenching copper roller 3. The grinding wheel 26 can be fixed in the annular bracket 6 by bolts. The bolts pass through the annular bracket 6 from the outside to the inside and press and fix the grinding wheel 26. The bolts are threaded to the outer wall of the annular bracket. The bolts can be distributed in a cross shape on the side wall between the annulus. Since the grinding wheel 26 is rigid, there is no need to set up an airbag 24.

[0040] Furthermore, the edge of the sandpaper 25 is fixed to the side of the annular bracket 6 by screws. Specifically, to avoid the screws causing wear to the quenching copper roller 3, the screws are fixed on the side of the annular bracket 6, keeping them away from the surface of the quenching copper roller 3.

[0041] Furthermore, the length of the support rod 7 is greater than the length of the rapid cooling copper roller 3, and there are multiple support rods 7 arranged in a ring with uniform intervals around the annular support 6. The ends of the multiple support rods 7 away from the annular support 6 are connected to a connecting plate 8, and the middle of the connecting plate 8 is connected to the output end of the cylinder 9. Specifically, the multiple support rods 7 form a cylindrical structure, which also allows the rapid cooling copper roller 3 to pass through. The length of the support rod 7 is greater than the length of the rapid cooling copper roller 3, so that the annular support 6 can move to the leftmost position of the rapid cooling copper roller 3 to achieve all-round grinding and polishing of the surface of the rapid cooling copper roller 3. One end of the multiple support rods 7 is welded to the annular support 6, and the other end is welded to the connecting plate 8. The middle position of the connecting plate 8 is connected to the output end of the cylinder 9. In this way, the extension and retraction of the output end of the cylinder 9 can drive the lateral movement of the annular support 6 to achieve grinding and polishing of the water-cooled roller.

[0042] Example 3

[0043] Furthermore, the adjustable fine cooling mechanism includes a fine cooling turntable 13 located below the coarse cooling turntable 11. The top of the fine cooling turntable 13 is open and does not contact the bottom surface of the coarse cooling turntable 11. A valve for controlling the flow of cooling water is provided on the side wall of the fine cooling turntable 13. Several cold heads 12 are distributed in a concentric ring at the bottom of the fine cooling turntable 13. The inside of the cold head 12 is formed by a partition to form an inlet water channel and an outlet water channel. The cold head 12 is connected to an external water supply pipe through a pipe. The output end of the second motor 14 passes through the bottom of the fine cooling turntable 13 and is connected to the coarse cooling turntable 11.

[0044] In this embodiment, as Figure 1 and 3As shown, a fine cooling turntable 13 is installed below the coarse cooling turntable 11. The fine cooling turntable 13 is located at the bottom of the furnace body 1. The fine cooling turntable 13 is circular with an open top. The top of the fine cooling turntable 13 does not contact the bottom surface of the coarse cooling turntable 11, maintaining a certain distance. The projected area of ​​the fine cooling turntable 13 is not less than the projected area of ​​the coarse cooling turntable 11. Several cold heads 12 are fixed on the bottom surface of the fine cooling turntable 13, arranged concentrically. The interior of each cold head 12 is divided into an inlet and an outlet water channel by a partition. The inlet water channel is connected to an external water supply pipe, and the outlet water channel discharges the heat-exchanged water to the outside of the furnace body 1 through a pipe. The output end of the second motor 14 passes directly through the middle of the fine cooling turntable 13 and connects upwards to the middle of the coarse cooling turntable 11. The second motor can be located at... Inside the vacuum chamber of the furnace body, or outside the furnace body, the second motor will also drive the fine cooling turntable 13 to rotate. There is a speed difference between the fine cooling turntable 13 and the coarse cooling turntable 11. A gear structure (not shown in the figure) can be set between the output shaft of the second motor 14 and the fine cooling turntable 13. A gear is installed on the output shaft, and a ring gear with teeth on the inner side is installed in the middle of the fine cooling turntable 13. The ring gear meshes with the gear on the output shaft. When the alloy sheet that has not been cooled to the ideal temperature falls into the coarse cooling turntable 11, the cooling water inside several cold heads 12 is circulating to cool the fallen alloy sheet again. At the same time, the fallen alloy sheet can also be stirred. This can further and quickly remove the heat generated by the alloy sheet, and achieve rapid cooling to the ideal temperature, which is about 200°C.

[0045] Example 4

[0046] Furthermore, the sleeve 2 has multiple vertically downward stirring rods 15 on its side. The multiple stirring rods 15 are distributed at intervals along the length of the sleeve 2. The lower end of the stirring rods 15 is provided with stirring blocks 16, and the two form an L shape. The stirring blocks 16 have sharp ends, and the sharp ends are opposite to the circumferential tangent direction of the coarse cooling turntable 11.

[0047] In this embodiment, as Figure 1 As shown in / 2 / 4, multiple stirring rods 15 are fixed to the sleeve 2 by welding or bolts. Stirring blocks 16 are welded to the lower end of the stirring rods 15. The stirring blocks 16 have sharp ends and are close to the bottom surface of the coarse cooling turntable 11. During the rotation of the coarse cooling turntable 11, the sharp ends of the stirring blocks 16 can stir the alloy sheets accumulated in the coarse cooling turntable 11. This can accelerate the cooling rate of the alloy sheets and prevent the alloy sheets that are not completely cooled from agglomerating or clumping, thereby improving the quality of the alloy sheets.

[0048] Furthermore, the stirring block 16 is composed of two triangular blocks 21 welded together at an incline to form an arrow structure, and the bottom surface of the stirring block 16 is inverted V-shaped. Specifically, the stirring block 16 consists of two triangular blocks 21 welded together or integrally formed to form an arrow structure. When the two stirring blocks 16 are connected, they form an inverted V-shape. This makes it easier for the stirring block 16 to flip up the accumulated alloy sheets, allowing for faster heat dissipation and a faster cooling rate.

[0049] Furthermore, both of the triangular blocks 21 have cavities and the two cavities are connected. One of the triangular blocks 21 has a water inlet 22 connected to its cavity at its tail end, and the other triangular block 21 has a water outlet 23 connected to its cavity at its tail end. The water inlet 22 is connected to an external water supply pipe through a pipe, and the water outlet 23 is connected to the fine cooling turntable 13 through a pipe.

[0050] Specifically, both triangular blocks 21 have cavities inside, and the cavities of the two triangular blocks 21 are interconnected. When the stirring block 16 stirs and flips the alloy sheet, cooling water can be injected into the water inlet 22 through the water supply pipe. The cooling water can further carry away the heat generated by the alloy sheet from the water outlet 23, thereby further accelerating the cooling rate of the alloy sheet. The cooling water after heat exchange returns to the fine cooling turntable 13.

[0051] Furthermore, a booster pump is installed on the water supply pipe. Specifically, in order to accelerate the removal of heat from the alloy sheet by the cooling water inside the cold head and increase its cooling rate, the booster pump (not shown in the figure) can increase the cooling water flow rate, thereby accelerating the heat dissipation of the alloy sheet.

[0052] The working principle of this scheme is as follows: After the molten alloy enters the quenching copper roller 3 in the flow channel of the tundish 4, the quenching copper roller 3 is circulated with a cooling medium, which rapidly and initially cools the molten alloy flowing out of the tundish 4, causing it to solidify and crystallize into alloy flakes. The first motor 18 rotates the quenching copper roller 3 in either the forward or reverse direction, throwing the formed alloy flakes into the coarse cooling turntable 11. The second motor 14 rotates, driving the coarse cooling turntable 11 to rotate. The coarse cooling turntable 11 is an existing structure with internal cooling capabilities, which can cool the alloy flakes within it. Figure 8As shown, the cooled alloy sheet falls from the discharge port 27 of the coarse cooling turntable 11 into the fine cooling turntable 13 below. Several cold heads 12 within the fine cooling turntable 13 further cool the fallen alloy sheet. When the second motor 14 drives the fine cooling turntable 13 to rotate, the cold heads 12 can stir the internal alloy sheet, accelerating cooling. Simultaneously, as the coarse cooling turntable 11 rotates, the stirring block 16 flips the accumulated alloy sheet, making its heat dissipation faster. Cooling water is injected into the inlet 22 through the water supply pipe. The cooling water can further carry away the heat generated by the alloy sheet from the outlet 23, further accelerating the cooling rate of the alloy sheet. Through multi-stage cooling of the alloy sheet, the desired cooling effect is achieved. The purpose of rapid cooling is to accelerate the cooling speed of the ejected alloy sheet in the coarse cooling turntable 11, allowing it to solidify quickly and completely, avoiding agglomeration and clumping. Products made from this alloy sheet have relatively high performance. At the same time, after long-term use, the telescopic polishing mechanism on the inner wall of the furnace body 1, combined with the rotation of the telescopic copper roller 3, can automatically polish the copper roller 3. Compared with manual polishing, mechanical polishing is less likely to cause unevenness on the polished surface, and the polishing finish is more uniform. It effectively avoids the risk of elliptical deformation of the copper roller 3 caused by long-term improper polishing. Mechanical polishing saves time and effort and has high polishing efficiency.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Based on the technical essence of the present invention, any simple modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principles of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A vacuum rapid solidification furnace integrating quenching and polishing, comprising a furnace body (1), the furnace body (1) is connected with a vacuum subsystem (17), characterized in that, The furnace body (1) is internally provided with an induction melting crucible (5), a rapid cooling copper roller (3), a tundish (4), a flow baffle (19) and a rough cooling rotary disc (11), the inner wall of the furnace body (1) is transversely provided with a sleeve (2) located above the rough cooling rotary disc (11), the outer wall of the furnace body (1) is provided with a first motor (18), the output end of the first motor (18) is connected with one end of the rapid cooling copper roller (3) after penetrating through the sleeve (2), the rapid cooling copper roller (3) is located directly below the tundish (4), the tundish (4) is located at the side of the induction melting crucible (5), the flow baffle (19) is arranged between the induction melting crucible (5) and the tundish (4), the discharge port of the tundish (4) faces the surface of the rapid cooling copper roller (3), the rough cooling rotary disc (11) is rotationally arranged directly below the rapid cooling copper roller (3), the rough cooling rotary disc (11) is connected with a second motor (14) at the bottom of the furnace body (1), the inner wall of the furnace body (1) is provided with a telescopic polishing mechanism corresponding to the rapid cooling copper roller (3), and the bottom of the rough cooling rotary disc (11) is provided with an adjustable fine cooling mechanism for re-cooling the materials in the rough cooling rotary disc (11). The adjustable fine cooling mechanism comprises a fine cooling rotary disc (13) located below the rough cooling rotary disc (11), the top end of the fine cooling rotary disc (13) is open and does not contact the bottom surface of the rough cooling rotary disc (11), the side wall of the fine cooling rotary disc (13) is provided with a valve for controlling the outflow of cooling water, the bottom of the fine cooling rotary disc (13) is in a concentric circular ring shape and is provided with a plurality of cold heads (12), the inside of the cold head (12) is formed with an inlet water flow channel and an outlet water flow channel by a partition plate, the cold head (12) is connected with an external water supply pipe through a pipeline, and the output end of the second motor (14) is connected with the fine cooling rotary disc (13) and the rough cooling rotary disc (11).

2. The vacuum rapid solidification furnace integrated with control quenching and polishing according to claim 1, characterized in that, The telescopic polishing mechanism comprises a base (10), an annular support (6), an air cylinder (9) and sandpaper (25), the base (10) is fixed to the opposite inner side wall of the furnace body (1) of the rapid cooling copper roller (3), the air cylinder (9) is fixed to the side of the base (10), the output end of the air cylinder (9) is connected with the annular support (6) through a support rod (7), the inner ring of the annular support (6) allows the rapid cooling copper roller (3) to pass through, and the sandpaper (25) is adaptively attached to the inner ring of the annular support (6).

3. The vacuum rapid solidification furnace integrated with control quenching and polishing according to claim 2, characterized in that, A ring of air bags (24) is arranged between the sandpaper (25) and the inner wall of the annular support (6), and the air bags (24) are filled with compressed air or pressurized inert gas.

4. The vacuum rapid solidification furnace integrated with control quenching and polishing according to claim 3, characterized in that, The edges of the sandpaper (25) are fixed to the side of the annular support (6) by screws.

5. The vacuum rapid solidification furnace integrated with control quenching and polishing according to claim 2, characterized in that, The length of the support rod (7) is greater than the length of the rapid cooling copper roller (3) and a plurality of support rods (7) are arranged, the plurality of support rods (7) are uniformly and evenly distributed in the circumferential direction of the annular support (6) in a ring shape, the end portions of the plurality of support rods (7) away from the annular support (6) are connected with a connecting plate (8), and the middle portion of the connecting plate (8) is connected with the output end of the air cylinder (9).

6. The vacuum rapid solidification furnace integrated with control quenching and polishing according to claim 1, characterized in that, The sleeve (2) is provided with a plurality of vertical downward stirring rods (15) on the side, the plurality of stirring rods (15) are distributed along the length direction of the sleeve (2) at intervals, the lower end of the stirring rod (15) is provided with a stirring block (16) and both form an L shape, the stirring block (16) has a sharp end and the sharp end is opposite to the tangential direction of the circle of the rough cooling turntable (11).

7. The vacuum rapid solidification furnace integrated with a control quenching and polishing according to claim 6, wherein, The stirring block (16) is composed of two triangular blocks (21) which are mutually inclined and welded to form an arrow structure, and the bottom surface of the stirring block (16) is in an inverted V shape.

8. The vacuum rapid solidification furnace integrated with a control quenching and polishing according to claim 7, characterized in that, Both of the two triangular blocks (21) have cavities, and the two cavities are communicated, the tail end of one of the triangular blocks (21) is provided with a water inlet (22) which is communicated with the cavity thereof, the tail end of the other triangular block (21) is provided with a water outlet (23) which is communicated with the cavity thereof, the water inlet (22) is communicated with an external water supply pipe through a pipeline, and the water outlet (23) is communicated with the fine cooling turntable (13) through a pipeline.

9. The vacuum rapid solidification furnace integrated with a control quenching and polishing according to claim 8, wherein, A booster pump is arranged on the water supply pipe.

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