A vacuum belt spinning furnace for neodymium iron boron materials

Abstract

This invention relates to the field of vacuum melting, specifically disclosing a vacuum spinning furnace for NdFeB materials. The furnace includes a control cabinet, a furnace body, a vacuum system, a cooling system, a furnace door that can be sealed to the furnace body, and a crucible coil located within the furnace body. The cooling system includes a rotating spinning wheel and a condensation system for cooling the spinning wheel. The spinning wheel is rotatably mounted on the side wall of the furnace body. A cooling shroud is also included, enclosing the spinning wheel. One side of the cooling shroud is snapped onto the side wall of the furnace body. The cooling shroud has a condensation port opposite to the crucible coil and an air outlet opposite to the vacuum system. This design allows for the collection of NdFeB material flakes within the cooling shroud, improving the collection efficiency of the NdFeB material flakes. It also reduces the residual amount of NdFeB material flakes within the furnace body, thus reducing impurities in the metal during subsequent spinning processing.

Description

Technical Field

[0001] This invention relates to the field of vacuum melting technology, and in particular to a vacuum belt spinning furnace for neodymium iron boron materials. Background Technology

[0002] Vacuum strip spinning furnaces are specialized equipment commonly used for metal material processing and heat treatment, widely applied in industries such as steel, non-ferrous metals, and aerospace. The strip spinning process includes multiple steps such as melting, strip spinning, and cooling. Melting involves melting the proportioned raw materials in a vacuum induction furnace to obtain an ingot structure (alloy strip). Strip spinning rapidly cools the molten metal material on high-speed rotating copper rollers to obtain a thin strip, thereby achieving purification.

[0003] During the strip spinning process, due to the high cooling rate of the thin strip, the different cooling environments between the roller surface and the free surface, and the collision between the spun strip and the bottom of the cavity, stress and uneven composition may occur. Consequently, the cooled strip will be in the form of relatively pulverized metal fragments, which will be scattered throughout the furnace, making subsequent collection of the strip metal difficult. At the same time, after repeated use of the vacuum strip spinning furnace, other metals will remain in the furnace after spinning different metal materials, becoming impurities in the metal spinning process. Because relatively pulverized metal fragments are easily left in the vacuum strip spinning furnace, they are also difficult to clean, resulting in a large number of impurities in the metal material formed by strip spinning, making maintenance and cleaning difficult. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a vacuum strip spinning furnace for neodymium iron boron materials, which solves the problem that the cooled strips are in the form of relatively pulverized metal fragments, which are scattered throughout the furnace, making subsequent collection of the strip metal difficult.

[0005] To achieve the above objectives, the basic solution of the present invention is as follows: A vacuum spinning furnace for neodymium iron boron materials, comprising a control cabinet, a furnace body, a vacuum system, a cooling system, a furnace door that can be sealed to the furnace body, and a crucible coil located inside the furnace body. The cooling system includes a rotating spinning wheel and a condensation system for cooling the spinning wheel. The spinning wheel is rotatably mounted on the side wall of the furnace body. The invention also includes:

[0006] The cooling shroud is wrapped around the spinning wheel. One side of the cooling shroud is snapped onto the side wall of the furnace body. The cooling shroud has a condensation port opposite to the crucible coil and an air outlet opposite to the vacuum system.

[0007] The technical principle of this invention is as follows: When using a vacuum spinning furnace to process NdFeB materials, the NdFeB materials are placed in a crucible and transferred to a crucible coil. The furnace body is then sealed, and a vacuum system is used to evacuate the furnace body to provide vacuum protection for the NdFeB materials inside the crucible. The control cabinet then controls the crucible coil and condensation system to start. The condensation system drives the spinning wheel to rotate and cools the spinning wheel. The NdFeB materials processed and shaped by the spinning wheel condense on the spinning wheel to form NdFeB material sheets. At this time, the cooling hood can collect the NdFeB material sheets spun out by the spinning wheel, and the hot air generated by the cooling hood can be efficiently discharged from the air outlet, so that the NdFeB material sheets are cooled quickly, improving the speed of NdFeB material sheet forming.

[0008] After the NdFeB material sheets are formed, the furnace body is opened and the cooling cover on the furnace body is removed. At this time, the NdFeB material sheets inside the cooling cover can be collected, which improves the collection efficiency of NdFeB material sheets and reduces the residual amount of NdFeB material sheets in the furnace body, thereby reducing impurities in the metal during subsequent strip spinning.

[0009] Furthermore, the vertical sidewall of the furnace body is provided with several air inlets for argon gas to enter, and the air inlets are located between the outer wall of the impeller and the inner wall of the cooling shroud.

[0010] With the above setup, during the molding of NdFeB material sheets, argon gas enters from the inlet between the outer wall of the spinning wheel and the inner wall of the cooling shroud. The argon gas can protect the NdFeB material sheets during the molding process, resulting in fewer impurities in the molded NdFeB material sheets. With the cooperation of the cooling shroud and the inlet, the argon gas can fully fill the cooling shroud, improving the protection efficiency of the NdFeB material sheets.

[0011] Furthermore, it also includes an inlet pipe for argon gas, which is sealed and connected to the gas inlet of the furnace body. The end of the inlet pipe away from the gas inlet passes through the condensation system and is circulated and connected to the vacuum system. A switch valve is provided at the connection between the vacuum system and the inlet pipe, and a vacuum exhaust valve is provided in the vacuum system.

[0012] With the above setup, the inlet pipe can work in conjunction with the vacuum system and the condensation system, allowing argon gas to circulate between the vacuum system, the inlet pipe, and the furnace body. During the circulation process, the condensation system cools the argon gas, which protects the NdFeB material sheet while cooling it. This allows the NdFeB material sheet to be formed quickly, and the argon gas can be recycled, reducing the forming cost of the NdFeB material sheet.

[0013] Furthermore, an annular groove is coaxially provided on the outer wall of the slinger, and the groove is directly opposite the crucible coil.

[0014] With the above settings, the groove can limit the formation of NdFeB material sheets, making the forming of NdFeB material sheets more accurate and uniform.

[0015] Furthermore, the cooling shroud is cylindrical and coaxially arranged with the impeller, and an observation hole is coaxially arranged on the end of the cooling shroud away from the side wall of the furnace body. The inner diameter of the observation hole is larger than the outer diameter of the impeller.

[0016] With the above setup, the forming process of the NdFeB material sheet can be observed through the observation hole on the cooling cover, thereby gaining a more accurate understanding of the forming state and condition of the NdFeB material sheet.

[0017] Furthermore, the cooling shroud is made of copper.

[0018] With the above setup, the cooling shroud also has good cooling characteristics, which allows the cooling shroud to be separated from the NdFeB material sheet, making the NdFeB material sheet purer.

[0019] Furthermore, it also includes an arc-shaped scraper, and the vacuum system includes a vacuum pump and a vacuum tube connected to the vacuum pump. The end of the vacuum tube away from the vacuum pump is connected to the furnace body and faces the air outlet. One end of the scraper passes through the air outlet and can fit into the groove of the swivel wheel. The other end of the scraper is opposite to the lower side wall of the vacuum tube near the furnace body. The lower side of the scraper fits into the lower side of the air outlet.

[0020] With the above setup, since the right end of the scraper abuts against the groove of the swivel wheel, the swivel wheel rotates clockwise. The scraper can separate the NdFeB material sheet in the groove from the swivel wheel. The separated NdFeB material sheet can be confined inside the cooling shroud, allowing the NdFeB material sheet to be quickly separated from the swivel wheel, which facilitates the collection of the NdFeB material sheet.

[0021] Furthermore, it also includes a horizontal adjustment unit, which includes:

[0022] An adjusting gear is located inside the furnace body. The lower side of the scraper is provided with meshing teeth that mesh with the adjusting gear. A support block is attached to the side of the scraper away from the air outlet, and the support block is fixedly connected to the inner wall of the furnace body.

[0023] An electric motor drives the adjusting gear to rotate, and the adjusting motor is fixedly installed on the outer wall of the furnace body.

[0024] With the above settings, the position of the scraper can be adjusted according to the thickness of the NdFeB material sheet, and the motor can be controlled to drive the adjusting gear to rotate. The adjusting gear drives the scraper to move horizontally through the meshing teeth on the scraper. The support block and the air outlet of the cooling cover can provide stable support for the horizontal movement of the scraper, thereby enabling the scraper to accurately separate the NdFeB material sheet from the groove of the wheel, improving the separation efficiency of the NdFeB material sheet.

[0025] Furthermore, the blade of the scraper is located on the side closest to the groove.

[0026] With the above settings, the blade can more fully separate the NdFeB material sheet from the spinning wheel.

[0027] Furthermore, a glass observation window is provided in the center of the furnace door.

[0028] With the above setup, the forming process of NdFeB material sheets can be observed through the glass observation window on the furnace door, thereby gaining a more accurate understanding of the forming status and condition of the NdFeB material sheets. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a vacuum belt spinning furnace for neodymium iron boron materials after the furnace door has been removed, according to Embodiment 1 of the present invention.

[0030] Figure 2 This is a schematic diagram of the structure of a vacuum spinning furnace for neodymium iron boron materials after the furnace door has been removed, according to Embodiment 1 of the present invention.

[0031] Figure 3 This is a schematic diagram of the structure of a vacuum spinning furnace for neodymium iron boron materials after the furnace door has been removed, according to Embodiment 2 of the present invention.

[0032] In the above-mentioned attached figures: control cabinet 10, furnace body 20, air inlet 201, vacuum tube 30, cooling cover 40, condenser 401, air outlet 402, observation hole 403, pneumatic telescopic rod 501, air pump 502, connecting block 503, scraper 60, meshing tooth 601, support block 602, crucible coil 70, swivel wheel 70, groove 701, adjusting gear 801, motor 802. Detailed Implementation

[0033] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] Example 1

[0035] This embodiment is basically as follows: Figure 1 and Figure 2As shown in the figure, this invention proposes a vacuum spinning furnace for neodymium iron boron materials, including a control cabinet 10, a furnace body 20, a vacuum system, a cooling system, a furnace door that can be sealed to the furnace body 20, a cooling hood 40, an inlet pipe for argon gas, a telescopic arm detachably connected to the crucible, an arc-shaped scraper 60, a leveling unit, and a crucible coil 70 located inside the furnace body 20. A glass observation window is provided at the center of the furnace door; the vacuum system includes a vacuum pump and a vacuum pipe 30 connected to the vacuum pump, and the vacuum pump is equipped with a control device for turning the vacuum pump on or off. A switch valve is provided, with the right end of the vacuum tube 30 connected to the middle of the left side wall of the furnace body 20; the cooling system includes a rotating impeller 70 and a condensation system for cooling the impeller 70, the condensation system controls the circulation of coolant, and the coolant can flow into the impeller 70; the condensation system is provided with a second switch valve to control the opening or closing of the condensation system; the crucible coil 70 is connected to a power source, and both ends of the crucible coil 70 pass through the rear vertical side wall of the furnace body 20 and are connected to the power source, and a third switch is connected to the crucible coil 70 to control the opening or closing of the crucible coil 70.

[0036] like Figure 2 As shown, the telescopic arm is a pneumatic telescopic rod 501. The lower end of the telescopic rod passes through the top surface of the furnace body 20 and is located inside the furnace body 20. The upper end of the pneumatic telescopic rod 501 is connected to an air pump 502 that controls the length of the pneumatic telescopic rod 501. The air pump 502 is connected to a fourth switch that controls the extension or retraction of the pneumatic telescopic rod 501. The lower end of the pneumatic telescopic rod 501 is provided with a connecting block 503 for connecting the crucible. The pneumatic telescopic rod 501 is located directly above the crucible coil 70.

[0037] like Figure 1 and Figure 2 As shown, the cooling shroud 40 is made of copper and wraps around the spinning wheel 70. The cooling shroud 40 is cylindrical and coaxial with the spinning wheel 70. An annular groove 701 is coaxially arranged on the outer wall of the spinning wheel 70, and the groove 701 is directly opposite the crucible coil 70. One side of the cooling shroud 40 is snapped onto the side wall of the furnace body 20. The cooling shroud 40 has a vertically upward condensation port 401 that is opposite to the crucible coil 70. An air outlet 402 is provided on the left side of the cooling shroud 40, which is directly opposite the right end of the vacuum tube 30.

[0038] At the same time, such as Figure 2As shown, the vertical sidewall of the furnace body 20 is provided with several air inlets 201 for argon gas to enter. The air inlets 201 are located between the outer wall of the impeller 70 and the inner wall of the cooling shroud 40. The air inlet pipe is sealed and connected to the air inlet 201 of the furnace body 20. The end of the air inlet pipe away from the air inlet 201 passes through the condensation system and is circulated and connected to the vacuum system. A switch valve is provided at the connection between the vacuum system and the air inlet pipe. A vacuum exhaust valve is provided in the vacuum system. The right end of the vacuum tube 30 is directly opposite the air outlet 402. One end of the scraper 60 passes through the air outlet 402 and can fit into the groove 701 of the impeller 70. The other end of the scraper 60 is opposite to the lower sidewall of the vacuum tube 30 near the furnace body 20. The lower side of the scraper 60 fits into the lower side of the air outlet 402. The blade of the scraper 60 is located on the side near the groove 701.

[0039] like Figure 1 As shown, the control cabinet 10 is located on the right side of the furnace body 20, and the control cabinet 10 is equipped with a control PLC controller, a touch screen electrically connected to the PLC controller, and a vacuum sensor for sensing the vacuum level of the furnace body 20. The first switch valve, the second switch valve, the third switch, the fourth switch, the switch valve, the vacuum exhaust valve, and the vacuum sensor are all electrically connected to the PLC controller.

[0040] In this embodiment, when using a vacuum spinning furnace for NdFeB materials, the crucible containing NdFeB materials is first installed onto the connecting block 503. Then, the air pump 502 is controlled according to the installation position of the crucible. The air pump 502 controls the extension or retraction of the pneumatic telescopic rod 501, so that the pneumatic telescopic rod 501 moves the crucible into the crucible coil 70, preparing for subsequent heating of the NdFeB materials.

[0041] Then, the furnace door on furnace body 20 is closed, and control signals for opening the vacuum pump and vacuum exhaust valve are input to the PLC controller via the touch screen. The PLC controller controls the vacuum pump and vacuum exhaust valve to open, and the vacuum pump evacuates the furnace body 20 through vacuum tube 30. The vacuum sensor transmits the vacuum level signal to the PLC controller in real time, and the PLC controller controls the vacuum pump and vacuum exhaust valve to close. Then, control signals for opening the second and third switches are input to the PLC controller via the touch screen again. The condensation system controls the circulation of coolant, and the coolant can flow into the impeller 70; the crucible coil 70... With the power supply connected, the crucible coil 70 heats the NdFeB material inside the crucible. During this process, by controlling the heating temperature of the NdFeB material by the crucible coil 70, impurities in the NdFeB material are separated from the NdFeB material. The NdFeB material enters the condensation port 401 through the crucible and contacts the groove 701 of the spinning wheel 70. The cooling spinning wheel 70 rapidly cools the NdFeB material, and the rotating spinning wheel 70 causes the NdFeB material to condense into thin sheets on the spinning wheel 70. The thin sheets of NdFeB material are confined in the cooling cover 40, which can prevent the NdFeB material from scattering to a certain extent.

[0042] While the spinning wheel 70 cools the NdFeB material, the touch screen inputs control to the PLC controller to open the vacuum pump, switch valve, and inlet pipe. Argon gas, cooled by the condensation system, enters the cooling shroud 40 to rapidly cool the spun NdFeB material. The cooled argon gas is then injected into the cooling shroud 40 to fully cool and protect the NdFeB material, reducing impurities. Simultaneously, the used argon gas flows back to the inlet pipe through the vacuum tube 30 and switch valve. The condensation system cools the argon gas in the inlet pipe again, achieving argon gas circulation and cooling, improving argon gas utilization efficiency, and reducing the processing cost of spinning NdFeB material.

[0043] When the NdFeB material is being spun, the right end of the scraper 60 abuts against the groove 701 of the spun wheel 70, causing the spun wheel 70 to rotate clockwise. The scraper 60 can separate the NdFeB material sheet from the spun wheel 70 at the groove 701. The separated NdFeB material sheet can be confined within the cooling shroud 40. After the NdFeB material sheet is separated from the spun wheel 70, the furnace door of the furnace body 20 can be opened, the cooling shroud 40 on the furnace body 20 can be removed, and the processed NdFeB material sheet can be collected. This makes the collection of the NdFeB material sheet convenient and reduces the amount of NdFeB material sheet residue in the furnace body 20.

[0044] Example 2

[0045] The main differences between Example 2 and Example 1 are as follows: Figure 3 As shown, an observation hole 403 is coaxially provided on one end of the cooling hood 40 away from the side wall of the furnace body 20. The inner diameter of the observation hole 403 is larger than the outer diameter of the swivel wheel 70.

[0046] At the same time, such as Figure 3 As shown, the horizontal adjustment unit includes an adjustment gear 801 and a motor 802 that drives the adjustment gear 801 to rotate. The adjustment gear 801 is located inside the furnace body 20. The lower side of the scraper 60 is provided with meshing teeth 601 that mesh with the adjustment gear 801. A support block 602 is attached to the side of the scraper 60 away from the air outlet 402. The support block 602 is fixedly connected to the inner wall of the furnace body 20. The adjustment motor is fixedly installed on the outer wall of the furnace body 20.

[0047] In this embodiment, a vacuum spinning furnace for NdFeB materials allows for observation of the NdFeB material sheet forming process through the observation hole 403 on the cooling shroud 40 and the glass observation window on the furnace door. This enables a more accurate understanding of the NdFeB material sheet forming status. When using a scraper 60 to separate the NdFeB material sheet from the groove 701 of the spinning wheel 70, the position of the scraper 60 can be adjusted according to the thickness of the NdFeB material sheet. At this time, the motor 802 drives the adjusting gear 801 to rotate. The adjusting gear 801 drives the scraper 60 to move horizontally through the meshing teeth 601 on the scraper 60. The support block 602 and the air outlet 402 of the cooling shroud 40 provide stable support for the horizontal movement of the scraper 60, thereby enabling the scraper 60 to accurately separate the NdFeB material sheet from the groove 701 of the spinning wheel 70, improving the separation efficiency of the NdFeB material sheet.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A vacuum spinning furnace for neodymium iron boron materials, comprising a control cabinet, a furnace body, a vacuum system, a cooling system, a furnace door that can be sealed to the furnace body, and a crucible coil located inside the furnace body, wherein the cooling system includes a rotating spinning wheel and a condensation system for cooling the spinning wheel, the spinning wheel being rotatably mounted on the side wall of the furnace body, characterized in that, Also includes: A cooling shroud is provided, which is wrapped around the spinning wheel. One side of the cooling shroud is snapped onto the side wall of the furnace body. The cooling shroud has a condensation port opposite to the crucible coil and an air outlet opposite to the vacuum system. The vacuum system includes a vacuum pump and a vacuum tube connected to the vacuum pump; The cooling shroud is cylindrical and coaxial with the impeller. The outer wall of the impeller has an annular groove coaxially arranged, which is directly opposite the crucible coil. One side of the cooling shroud is snapped onto the side wall of the furnace body. The cooling shroud has a vertically upward condensation port that is opposite to the crucible coil. The left side of the cooling shroud has an air outlet that is directly opposite the right end of the vacuum tube. An observation hole is coaxially provided on the end of the cooling hood away from the side wall of the furnace body. The inner diameter of the observation hole is larger than the outer diameter of the swivel wheel. One end of the scraper passes through the air outlet and fits into the groove of the spinning wheel. The other end of the scraper is opposite to the lower side wall of the vacuum tube near the furnace body. The lower side of the scraper fits into the lower side of the air outlet.

2. The vacuum belt spinning furnace for NdFeB materials as described in claim 1, characterized in that, The furnace body has several air inlets on its vertical sidewalls for argon gas to enter, and the air inlets are located between the outer wall of the swivel wheel and the inner wall of the cooling shroud.

3. The vacuum belt spinning furnace for NdFeB materials as described in claim 2, characterized in that, It also includes an inlet pipe for argon gas, which is sealed and connected to the gas inlet of the furnace body. The end of the inlet pipe away from the gas inlet passes through the condensation system and is circulated and connected to the vacuum system. A switch valve is provided at the connection between the vacuum system and the inlet pipe, and a vacuum exhaust valve is provided in the vacuum system.

4. The vacuum belt spinning furnace for NdFeB materials as described in claim 1, characterized in that, The cooling shroud is made of copper.

5. The vacuum belt spinning furnace for NdFeB materials as described in claim 1, characterized in that, The blade of the scraper is located on the side closest to the groove.

6. The vacuum belt spinning furnace for NdFeB materials as described in claim 1, characterized in that, A glass observation window is provided in the center of the furnace door.

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