Electromagnetic casting device

Abstract

The utility model discloses an electromagnetic casting device, which relates to the technical field of casting equipment and comprises a crystallizer, the top of the crystallizer is provided with a sealing cover, and the sealing cover is provided with a melt feed port; the cooling assembly is arranged at the bottom of the crystallizer, so that a cavity of the cooling assembly and a cavity of the crystallizer are melt areas; the lifting assembly is arranged below the cooling assembly, a dummy bar head is arranged at the top end of the lifting assembly, and the lifting assembly and the dummy bar head are matched to enable a cast ingot formed in the melt area to move in the vertical direction; the first magnetic field generator is arranged at the top of the sealing cover, the second magnetic field generator is arranged at the bottom of the lifting assembly, and the first magnetic field generator and the second magnetic field generator are both in signal connection with the controller. According to the electromagnetic casting device, the structure uniformity and macrosegregation of the cast ingot are effectively improved, the grain size of the cast ingot is refined, and the comprehensive quality of the cast ingot is improved.

Description

Technical Field

[0001] This utility model relates to the field of casting equipment technology, and in particular to an electromagnetic casting device. Background Technology

[0002] Electromagnetic casting, also known as "magnetic flow casting," is a semi-continuous casting process that utilizes electromagnetic force for pressure and agitation.

[0003] Traditional electromagnetic casting devices act on the melt in only one direction using induced electromagnetic force, which still suffers from problems such as inhomogeneous melt chemical composition and high segregation of main components. Ingots produced using this method develop microcracks at the boundary between internal microparticles and the matrix during subsequent plastic deformation. These microcracks then develop into macrocracks under further deformation forces, negatively impacting the elongation, fracture toughness, and fatigue performance of the casting.

[0004] Therefore, how to provide an electromagnetic casting device to achieve uniform microstructure and low segregation rate of main component elements in the ingot core is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide an electromagnetic casting device that solves the technical problems of uneven chemical composition and high segregation of main components in existing ingot melts.

[0006] To achieve the above objectives, this utility model provides an electromagnetic casting apparatus, comprising:

[0007] The crystallizer has a sealing cover on top, and the sealing cover has a molten liquid inlet.

[0008] A cooling assembly is located at the bottom of the crystallizer, such that the cavity of the cooling assembly and the cavity of the crystallizer form a melt region;

[0009] A lifting assembly is located below the cooling assembly. The top of the lifting assembly is provided with a guide head. The lifting assembly and the guide head cooperate to make the ingot formed in the molten region move vertically.

[0010] A first magnetic field generator and a second magnetic field generator are provided. The first magnetic field generator is located at the top of the sealing cover, and the second magnetic field generator is located at the bottom of the lifting assembly. Both the first magnetic field generator and the second magnetic field generator are connected to the controller via signal.

[0011] Preferably, the first magnetic field generator includes:

[0012] The outer casing has a receiving cavity;

[0013] A fixed axis is connected to the outer casing;

[0014] The upper bearing, upper magnetic pole piece, magnet, lower magnetic pole piece, and lower bearing are sequentially sleeved on the fixed shaft and fitted against the inner wall of the receiving cavity;

[0015] An end cap is provided at the bottom of the outer casing.

[0016] Preferably, a vacuum spacer is provided between the upper bearing and the upper magnetic pole piece, and an atmospheric spacer is provided between the lower magnetic pole piece and the lower bearing.

[0017] Preferably, both ends of the fixed shaft are provided with slots.

[0018] Preferably, a liquid level sensor is provided inside the crystallizer cavity, and the liquid level sensor establishes a signal connection with the controller.

[0019] Preferably, the lifting assembly is a hydraulic support platform.

[0020] Preferably, the cooling assembly includes a mounting base, the mounting base having a cooling chamber, and the inner side of the cooling chamber having a water outlet.

[0021] Compared to the aforementioned background technology, the electromagnetic casting device provided by this utility model, when casting aluminum alloy ingots, has the lifting assembly in its initial position, at which point the ingot head is in contact with the bottom opening of the cooling assembly. Next, molten aluminum alloy enters the melt area through the molten inlet of the sealed cover, that is, into the cavity of the crystallizer and the cavity of the cooling assembly. The controller controls the first and second magnetic field generators to generate rotating magnetic fields that act on the molten aluminum alloy in the melt area. Thus, the rotating magnetic fields in two directions of the first and second magnetic field generators change the flow pattern and solidification process of the molten aluminum, effectively improving the uniformity of the aluminum alloy ingot structure and macroscopic segregation. When the molten aluminum alloy solidifies on the ingot head, the lifting assembly is lowered to drive the aluminum alloy ingot vertically downwards. When the length of the aluminum alloy ingot reaches a predetermined value, the lifting assembly stops working and returns to its initial position. Since the bottom of the crystallizer is equipped with a cooling assembly, the cooling assembly performs secondary cooling on the aluminum alloy ingot after the crystallizer has cooled, thereby refining the grain size of the aluminum alloy ingot and improving the overall quality of the ingot.

[0022] In summary, the electromagnetic casting apparatus provided in this application effectively improves the uniformity of the microstructure and macroscopic segregation of aluminum alloy ingots, refines the grain size of aluminum alloy ingots, and improves the overall quality of aluminum alloy ingots. Attached Figure Description

[0023] 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the electromagnetic casting device provided in an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the magnetic field generator structure provided in an embodiment of the present invention.

[0026] in:

[0027] 1-Crystallizer, 2-Sealing cover, 3-Cooling assembly, 4-Lifting assembly, 5-Inlet head, 6-First magnetic field generator, 7-Second magnetic field generator, 8-Liquid level sensor.

[0028] 61-Outer shell, 62-Fixed shaft, 621-Slot, 63-Upper bearing, 64-Upper magnetic pole piece, 65-Magnet, 66-Lower magnetic pole piece, 67-Lower bearing, 68-End cap, 69-Vacuum spacer, 691-Atmospheric spacer. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] See Figures 1-2This application provides an electromagnetic casting device, including a crystallizer 1 with a sealing cover 2 on top to seal the top of the crystallizer 1 and prevent the top of the crystallizer 1 from contacting the outside. The sealing cover 2 has a molten material inlet (not shown in the attached drawing); a cooling component 3 located at the bottom of the crystallizer 1, so that the cavity of the cooling component 3 and the cavity of the crystallizer 1 form a molten region, and the cavity of the cooling component 3 and the cavity of the crystallizer 1 are interconnected; a lifting component 4 located below the cooling component 3, with a guide head 5 at the top of the lifting component 4. The guide head 5 initially fits against the bottom opening of the cooling component 3 to block the bottom opening of the cooling component 3. The guide head 5 cooperates with the lifting component 4 to make the ingot formed in the molten region move vertically downward; a controller, a first magnetic field generator 6 and a second magnetic field generator 7 with the same structure. The first magnetic field generator 6 is located at the top of the sealing cover 2, and the second magnetic field generator 7 is located at the bottom of the lifting component 4. The controller establishes a signal connection with the first magnetic field generator 6 and the second magnetic field generator 7 respectively.

[0032] In other words, when the electromagnetic casting device of this application casts aluminum alloy ingots, the lifting assembly 4 is in the initial position, at which time the ingot head 5 is in contact with the bottom opening of the cooling assembly 3. Next, the molten aluminum alloy enters the melt area through the molten inlet of the sealing cover 2, that is, it enters the cavity of the crystallizer 1 and the cavity of the cooling assembly 3. The controller controls the first magnetic field generator 6 and the second magnetic field generator 7 to work and generate a rotating magnetic field that acts on the molten aluminum alloy in the melt area. Thus, the first magnetic field generator 6 and the second magnetic field generator 7 rotate in two directions. The magnetic field alters the flow pattern and solidification process of molten aluminum, effectively improving the uniformity of the aluminum alloy ingot structure and macroscopic segregation. When the molten aluminum alloy solidifies on the ingot head 5, the lifting component 4 is controlled to descend, driving the aluminum alloy ingot vertically downward. When the length of the aluminum alloy ingot reaches the predetermined value, the lifting component 4 stops working and returns to the initial position. Since the bottom of the crystallizer 1 of this application is equipped with a cooling component 3, the cooling component 3 performs secondary cooling on the aluminum alloy ingot after the crystallizer 1 has been cooled, thereby refining the grain size of the aluminum alloy ingot and improving the overall quality of the ingot.

[0033] In summary, the electromagnetic casting apparatus provided in this application effectively improves the uniformity of the microstructure and macroscopic segregation of aluminum alloy ingots, refines the grain size of aluminum alloy ingots, and improves the overall quality of aluminum alloy ingots.

[0034] Specifically, crystallizer 1 is a direct use of existing mature technology.

[0035] Based on the above embodiments, the first magnetic field generator 6 includes a housing 61 with a receiving cavity; a fixed shaft 62 connected to the housing 61; an upper bearing 63, an upper magnetic pole piece 64, a magnet 65, a lower magnetic pole piece 66, and a lower bearing 67, which are sequentially sleeved on the fixed shaft 62 and attached to the inner wall of the receiving cavity; and an end cap 68 located at the bottom of the housing 61.

[0036] In other words, the outer shell 61 has a cavity with a through hole at the top and an opening at the bottom. One end of the fixed shaft 62 passes through the through hole and is located outside the outer shell 61. The fixed shaft 62 located inside the cavity of the outer shell 61 is fitted with an upper bearing 63, an upper magnetic pole piece 64, a magnet 65, a lower magnetic pole piece 66, and a lower bearing 67 in sequence from top to bottom. The bottom of the outer shell 61 is provided with an end cap to seal the bottom opening of the outer shell 61, ensuring that the upper bearing 63, upper magnetic pole piece 64, magnet 65, lower magnetic pole piece 66, and lower bearing 67 are always located inside the cavity of the outer shell 61. In specific operation, the controller can control the first magnetic field generator 6 and the second magnetic field generator 7 to rotate at a specified speed. The rotating magnetic field acts on the aluminum alloy liquid core in the molten area to achieve synchronous rotation, which can effectively adjust the convection, heat transfer, and mass transfer processes of the solute in the molten aluminum alloy.

[0037] Specifically, the controller can be a programmable logic controller.

[0038] Specifically, the upper bearing 63, the upper magnetic pole piece 64, the magnet 65, the lower magnetic pole piece 66, and the lower bearing 67 are all installed with an interference fit to the cavity of the outer casing 61, and the upper bearing 63, the upper magnetic pole piece 64, the magnet 65, the lower magnetic pole piece 66, the lower bearing 67, and the outer casing 61 can rotate relative to the fixed axis 62.

[0039] Specifically, the upper magnetic pole piece 64 and the lower magnetic pole piece 66 are both made of iron. Together with the magnet 65, they can effectively increase the magnetic field strength, thereby increasing the stirring force of the molten liquid.

[0040] Specifically, the first magnetic field generator 6 also includes a rotary motor (not shown in the attached figure). The rotary motor is located above the housing 61 via a connector and establishes a signal connection with the controller. The output end of the rotary motor is connected to the housing 61, thereby enabling the housing 61 and the upper bearing 63, upper magnetic pole piece 64, magnet 65, lower magnetic pole piece 66 and lower bearing 67 located in the housing 61 cavity to rotate simultaneously around the fixed axis 62.

[0041] Specifically, the controller controls the frequency and input voltage of the rotary motor to achieve different output speeds, thereby driving the outer shell 61 and the various components in the cavity to rotate. The higher the speed, the faster the magnetic field rotates. Since the paramagnetic particles in the melt will follow the magnetic field to rotate, the stirring effect of the melt provided to the cavity is stronger, thereby promoting the uniform distribution of solute in the melt, reducing the segregation layer of the ingot after solidification, and improving the quality of the ingot.

[0042] Specifically, a vacuum spacer 69 is provided between the upper bearing 63 and the upper magnetic pole piece 64, an atmospheric spacer 691 is provided between the lower magnetic pole piece 66 and the lower bearing 67, and slots 621 are provided at both ends of the fixed shaft 62.

[0043] In other words, by setting up the vacuum spacer 69 and the atmospheric spacer 691 of this application, the high-temperature steam in the casting process can be isolated, ensuring the sealing state between the components in the cavity of the outer shell 61. By setting the slots at both ends of the fixed shaft 62, it is easy to fix and connect with the sealing cover 2.

[0044] Based on the above embodiments, a liquid level sensor 8 is provided in the crystallizer 1 cavity, and the liquid level sensor 8 establishes a signal connection with the controller.

[0045] The purpose of this configuration is that the level sensor 8 is used to dynamically monitor the position of the molten aluminum alloy surface within the molten area, thereby controlling the flow rate of the molten aluminum alloy.

[0046] Based on the embodiment, the lifting component 4 is a hydraulic support platform. The hydraulic support platform facilitates the vertical movement of the spindle head 5.

[0047] The cooling assembly includes a mounting base with a cooling chamber inside. The cooling chamber is connected to the cavity of the crystallizer 1 and has the same diameter. The cooling chamber is provided with a water outlet, and the water sprayed from the water outlet is used to cool the aluminum alloy ingots output from the bottom of the crystallizer 1.

[0048] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0049] This article uses specific examples to illustrate the principle and implementation of an electromagnetic casting device provided by this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An electromagnetic casting device, characterized in that: include: A crystallizer (1) is provided with a sealing cover (2) on the top, and a melt feed port is provided on the sealing cover (2); A cooling component (3) is arranged at the bottom of the crystallizer (1), so that the cavity of the cooling component (3) and the cavity of the crystallizer (1) form a melt area; A lifting assembly (4) is arranged below the cooling assembly (3), a starter head (5) is arranged at the top of the lifting assembly (4), and the lifting assembly (4) and the starter head (5) cooperate to enable the ingot formed in the melt area to move vertically; A first magnetic field generator (6) and a second magnetic field generator (7), wherein the first magnetic field generator (6) is arranged at the top of the sealing cover (2), and the second magnetic field generator (7) is arranged at the bottom of the lifting assembly (4), and both the first magnetic field generator (6) and the second magnetic field generator (7) establish signal connections with a controller.

2. The electromagnetic casting device according to claim 1, characterized in that: The first magnetic field generator (6) comprises: A housing (61) is provided with a receiving cavity; A fixed shaft (62) connected to the housing (61); An upper bearing (63), an upper magnetic pole piece (64), a magnet (65), a lower magnetic pole piece (66), and a lower bearing (67) are sequentially sleeved on the fixed shaft (62) and are attached to the inner wall of the accommodating cavity; The end cover (68) is disposed at the bottom of the housing (61).

3. The electromagnetic casting device according to claim 2, characterized in that: A vacuum spacer (69) is provided between the upper bearing (63) and the upper magnetic pole piece (64), and an atmosphere spacer (691) is provided between the lower magnetic pole piece (66) and the lower bearing (67).

4. The electromagnetic casting device according to claim 3, characterized in that: Both ends of the fixed shaft (62) are provided with clamping grooves (621).

5. The electromagnetic casting device according to any one of claims 1 to 4, characterized in that: A liquid level sensor (8) is provided in the cavity of the crystallizer (1), and the liquid level sensor (8) establishes a signal connection with the controller.

6. The electromagnetic casting device according to claim 5, characterized in that: The lifting component (4) is a hydraulic support platform.

7. The electromagnetic casting device according to claim 6, characterized in that: The cooling assembly comprises a mounting seat, a cooling cavity is arranged in the mounting seat, and a water outlet is arranged on the inner side surface of the cooling cavity.

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