A cooling structure for the surface of NdFeB cast plates on a copper tube

Abstract

This utility model discloses a cooling structure for the surface of NdFeB castings on a copper tube. A support frame is suspended and fixed on the top of the melting chamber above the cooling copper roller. A rack is vertically and movably inserted through the support frame, and an arc-shaped blower is fixed to the bottom end of the rack. The blower is movably positioned above the cooling copper roller, and several air outlets are opened on the inner arc surface of the blower. The outlet end of the argon gas delivery pipeline is connected to the air inlet of the blower via a connecting hose. A drive motor is fixed on the support frame, and a gear is coaxially fixed to the output end of the drive motor. The gear meshes with the rack for transmission. Beneficial effects: This utility model has a simple structure and is easy to implement. It achieves double-sided cooling of the alloy liquid, resulting in finer and more uniform grains on both sides of the casting, ensuring product quality. Operation is convenient and simple, and it increases the area of ​​the alloy liquid cooled by blowing in argon gas.

Description

Technical Field

[0001] This utility model relates to the technical field of neodymium iron boron preparation, and in particular to a cooling structure for the surface of neodymium iron boron castings on copper tubes. Background Technology

[0002] Neodymium iron boron (NdFeB) is an important magnetic material with excellent magnetic properties, earning it the nickname "King of Magnets." The preparation method for NdFeB involves first adding raw materials to a crucible in a melting furnace for smelting. The smelted raw materials are then poured from the crucible nozzle into the upper tundish of an intermediate ladle device, flowing to the lower tundish, and finally cast through the outlet of the lower tundish onto rotating cooling copper rollers. During this casting process, the melting chamber needs to be evacuated and filled with argon gas. After casting, the material undergoes powdering, molding, and sintering to obtain the NdFeB magnetic material (e.g., application number CN2021). Patent No. 10346862.X (titled "Smelting System") states that after the tundish and cooling copper rollers complete casting, they exit the smelting chamber along a track for replacement and cleaning. The cooling copper rollers are cooled by circulating water. The molten alloy is evenly spread on the rotating cooling copper rollers, and the heat of the molten alloy is quickly carried away by the circulating water. Nucleation points are formed first on the side that is attached to the cooling copper rollers, resulting in the grain size on the side of the casting sheet that is attached to the cooling copper rollers being smaller than the grain size on the other side. This leads to a large difference in grain size on the two sides of the casting sheet due to the different cooling rates, which in turn affects the quality of the product. Utility Model Content

[0003] The main purpose of this invention is to provide a cooling structure for the surface of NdFeB castings on copper tubes, which achieves double-sided cooling of the alloy liquid, making the grains on both sides of the castings fine and uniform, thus ensuring product quality; it is easy and simple to operate, and increases the area for blowing in argon gas to cool the alloy liquid.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a cooling structure for the surface of NdFeB cast sheets on copper tubes, comprising a melting chamber, an argon gas delivery pipeline, a vacuum pump, a track, a support platform, an intermediate ladle, and a cooling copper roller; the outlet end of the argon gas delivery pipeline is connected to the inlet of the melting chamber, the outlet end of the melting chamber is connected to the inlet of the vacuum pump, the track is provided on the ground of the melting chamber, the support platform is slidably arranged on the track, and the intermediate ladle and the cooling copper roller are fixed sequentially on the support platform; A support frame is suspended and fixed on the top of the melting chamber above the cooling copper roller. A rack is vertically and movably inserted through the support frame. An arc-shaped blower is fixed to the bottom end of the rack. The blower is movably positioned above the cooling copper roller. Several air outlets are opened on the inner arc surface of the blower. The outlet end of the argon gas delivery pipeline is connected to the air inlet of the blower via a connecting hose. A drive motor is fixed on the support frame. A gear is coaxially fixed to the output end of the drive motor. The gear meshes with the rack for transmission.

[0005] Furthermore, guide rods are fixed on the blower covers on both sides of the rack, and the guide rods are movably disposed on the support frame; a limit plate is fixed at the top of the guide rods above the support frame.

[0006] This utility model has the following beneficial effects: This invention features a simple and easily implemented structure. A support platform moves along a track into a fixed position within the melting chamber. Then, a drive motor rotates forward, lowering the blower hood a certain distance above the cooling copper roller. The casting process then begins, with the molten alloy evenly spread onto the rotating cooling copper roller. Heat on one side of the alloy is rapidly carried away by circulating water, while heat on the other side is cooled by blowing in argon gas, achieving double-sided cooling of the alloy. This results in fine and uniform grains on both sides of the cast sheet, ensuring product quality. After casting is complete, the drive motor reverses to raise the blower hood, preventing it from interfering with the removal of the cooling copper roller from the melting chamber. The operation is convenient and simple, and it increases the area of ​​the molten alloy cooled by blowing in argon gas. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the overall structure of a cooling structure for the surface of a neodymium iron boron casting on a copper tube according to the present invention.

[0009] Figure 2 for Figure 1 A cross-sectional view of section AA.

[0010] Figure 3 This is a schematic diagram of the blower cover.

[0011] In the diagram: 1. Melting chamber; 2. Argon gas delivery pipeline; 3. Vacuum pump; 4. Track; 5. Support platform; 6. Intermediate ladle; 7. Cooling copper roller; 8. Support frame; 9. Rack; 10. Blower hood; 101. Air outlet; 11. Drive motor; 12. Gear; 13. Guide rod; 14. Limiting plate. Detailed Implementation

[0012] The following is in conjunction with the appendix Figure 1-3 The principles and features of this utility model are described, making the technical means, creative features, and achieved objectives of this utility model easy to understand, and further elaborating on this utility model.

[0013] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0014] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0015] like Figure 1-3As shown, the technical solution adopted by this utility model is as follows: a cooling structure for the surface of NdFeB castings on copper tubes, comprising a melting chamber 1, an argon gas delivery pipeline 2, a vacuum pump 3, a track 4, a support platform 5, an intermediate ladle 6, and a cooling copper roller 7; the outlet of the argon gas delivery pipeline 2 is connected to the inlet of the melting chamber 1, and the outlet of the melting chamber 1 is connected to the inlet of the vacuum pump 3; a track 4 is provided on the ground of the melting chamber 1, and a support platform 5 is slidably provided on the track 4; an intermediate ladle 6 and a cooling copper roller 7 are sequentially fixed on the support platform 5; a support frame 8 is suspended and fixed on the top of the melting chamber 1 above the cooling copper roller 7, and a rack 9 is vertically and movably inserted through the support frame 8; the bottom of the rack 9... An arc-shaped blower hood 10 is fixed at one end, and the blower hood 10 is movably positioned above the cooling copper roller 7. Several air outlet holes 101 are opened on the inner arc surface of the blower hood 10. The air outlet of the argon gas delivery pipeline 2 is connected to the air inlet of the blower hood 10 through a connecting hose. A drive motor 11 is fixed on the support frame 8, and a gear 12 is coaxially fixed at the output end of the drive motor 11. The gear 12 meshes with the rack 9 for transmission. Guide rods 13 are fixed on the blower hood 10 on both sides of the rack 9. The guide rods 13 are movably installed through the support frame 8 to ensure that the blower hood 10 can move up and down. A limit plate 14 is fixed at the top of the guide rod 13 above the support frame 8 to prevent the blower hood 10 from falling.

[0016] Working principle: The intermediate ladle 6 and the cooling copper roller 7 move along the track 4 with the support platform 5 to a fixed position in the melting chamber 1. Then, the drive motor 11 starts to rotate forward, driving the gear 12 to rotate. The gear 12 drives the rack 9 to move downward, thereby lowering the blower hood 10 to a certain distance above the cooling copper roller 7. Then, argon gas is introduced into the blower hood 10, and then the casting process begins. The alloy liquid is evenly spread on the rotating cooling copper roller 7. The heat of the alloy liquid on one side of the cooling copper roller 7 is quickly carried away by the circulating water, while the heat on the other side is cooled by the cooled argon gas blown in. This achieves double-sided cooling of the alloy liquid, making the grains on both sides of the casting fine and uniform, ensuring the quality of the product. After casting is completed, the blower shroud 10 is lifted by reversing the drive motor 11 to avoid affecting the exit of the cooling copper roller 7 from the melting chamber 1. The operation is convenient and simple, and it increases the area for blowing argon gas to cool the alloy liquid. Then, the argon gas is stopped from being introduced into the blower shroud 10. Subsequently, the intermediate ladle 6 and the cooling copper roller 7 are moved to the outside along the track 4 with the support platform 5 for the replacement of the intermediate ladle 6 and the cleaning of the cooling copper roller 7. The present invention has a simple structure and is easy to implement.

[0017] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cooling structure for the surface of a neodymium-iron-boron cast sheet on a copper pipe, comprising a smelting chamber, an argon gas delivery pipeline, a vacuum pump, a track, a support platform, a tundish and a cooling copper roller; the gas outlet end of the argon gas delivery pipeline is in communication with the gas inlet of the smelting chamber, the gas outlet end of the smelting chamber is in communication with the gas inlet of the vacuum pump, the track is arranged on the ground of the smelting chamber, the support platform is slidingly arranged on the track, and the tundish and the cooling copper roller are sequentially fixed on the support platform; characterized in that, A support frame is suspended and fixed on the top of the melting chamber above the cooling copper roller. A rack is vertically and movably inserted through the support frame. An arc-shaped blower is fixed to the bottom end of the rack. The blower is movably positioned above the cooling copper roller. Several air outlets are opened on the inner arc surface of the blower. The outlet end of the argon gas delivery pipeline is connected to the air inlet of the blower via a connecting hose. A drive motor is fixed on the support frame. A gear is coaxially fixed to the output end of the drive motor. The gear meshes with the rack for transmission.

2. The cooling structure for the surface of a NdFeB cast sheet on a copper tube according to claim 1, characterized in that, Guide rods are fixed on the blower covers on both sides of the rack, and the guide rods are movably disposed on the support frame; a limit plate is fixed at the top of the guide rods above the support frame.

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