Electromagnetic auxiliary casting device for black metal

Through the combined electromagnetic stirrer and three-dimensional mobile rack combined with 3D printing technology, the problems of uneven electromagnetic field and low energy utilization in ferrous metal casting are solved, and efficient casting quality and yield improvement are achieved.

CN120394837APending Publication Date: 2025-08-01Liupanshan Laboratory
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Patent Information

Application Number
CN202510654484.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-21
Publication Date
2025-08-01

AI Technical Summary

Technical Problem

The existing electromagnetic auxiliary casting technology has uneven electromagnetic field distribution and low energy utilization in ferrous metal casting, making it difficult to accurately control high melting point and high viscosity metal liquid, resulting in frequent casting defects and insufficient device stability and life.

Method used

The composite electromagnetic stirrer and a three-dimensional mobile frame are used to combine the annular magnetic field and the traveling magnetic field to achieve multi-dimensional metal liquid control, and combine 3D printing technology to optimize the sand shape to avoid turbulence of metal liquid and promote grain refinement.

Benefits of technology

It improves the quality and yield of castings, reduces production costs, reduces pores and other defects in castings, and improves the mechanical properties of castings.

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Abstract

The electromagnetic auxiliary casting device for the black metal comprises a casting platform, and a sand mold is arranged on the top face of the casting platform; the casting platform is located in the three-dimensional moving frame; the top end of the three-dimensional moving frame is slidably connected with a mounting seat; the drainage pipe penetrates through the mounting seat and corresponds to the sand mold so as to inject molten metal; the composite electromagnetic stirrer comprises an annular shell, an annular coil winding and a traveling wave coil winding; the annular shell is fixed on the mounting seat and sleeves the outer wall of the drainage tube; the annular coil winding and the traveling wave coil winding are fixed in the annular shell to generate an annular magnetic field and a traveling wave magnetic field respectively; and the junction box is electrically connected with the annular coil winding and the traveling wave coil winding so as to enable the annular coil winding and the traveling wave coil winding to feed simultaneously or separately. Molten metal is drained through the drainage pipe, the traveling wave magnetic field can promote or restrain flowing of the molten metal, the rotating magnetic field generates Lorentz force to drive the molten metal to move, and active control over flowing of the molten metal is achieved.
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Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic assisted casting, and more particularly to a ferrous metal electromagnetic assisted casting device. Background Art

[0002] Ferrous metal casting, as a fundamental link in modern industry, plays a crucial role in fields such as machinery manufacturing and energy equipment. However, with the continuous improvement of the performance requirements for components in high-end equipment manufacturing, traditional casting processes have become difficult to meet the production needs of castings with complex structures and high mechanical properties. Traditional sand casting mainly relies on gravity and natural convection to complete the filling and solidification of molten metal. This control method leads to frequent defects such as shrinkage cavities, gas holes, and segregation. For ferrous metals with high melting points and high viscosities, traditional processes also have problems such as incomplete filling and coarse solidification structures, which greatly limit the improvement of casting quality. At the same time, the slow cooling and solidification rate of high-melting-point molten metal are prone to defects such as shrinkage cavities, shrinkage porosity, and inclusions, further reducing the yield rate and making it difficult to meet the production needs of castings with complex structures and high-performance requirements.

[0003] Electromagnetic assisted casting technology non-contact regulates molten metal through electromagnetic force, generating effects such as electromagnetic stirring, restraint, and driving. To a certain extent, it improves the movement state of molten metal, promotes grain refinement, and enhances the mechanical properties of castings. However, when applied to ferrous metal casting, the existing electromagnetic assisted casting technology still has significant deficiencies. The high-temperature and highly corrosive environment of ferrous metal casting not only causes uneven distribution of the electromagnetic field and low energy utilization rate, making it difficult to achieve precise control of high-melting-point and high-viscosity ferrous metal molten liquid, resulting in prominent casting defect problems, but also poses challenges to the stability and service life of electromagnetic assisted devices.

[0004] Therefore, how to provide an efficient electromagnetic assisted casting device suitable for the characteristics of ferrous metals is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a ferrous metal electromagnetic assisted casting device, which solves the problems of poor quality, low yield rate, and high production cost of ferrous metal castings.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A ferrous metal electromagnetic assisted casting device, comprising:

[0008] A casting platform, on the top surface of which a sand mold is provided;

[0009] A three-dimensional moving frame, within which the casting platform is located; an installation seat is slidably connected to the top end of the three-dimensional moving frame;

[0010] A drainage pipe, the upper end of which receives the molten metal, and the lower end of which vertically penetrates the mounting seat and corresponds to the sand mold to inject the molten metal for casting the workpiece;

[0011] A composite electromagnetic stirrer, comprising an annular housing, an annular coil winding, and a traveling wave coil winding; the annular housing is fixed to the mounting base and sleeved on the outer wall of the drainage tube; the annular coil winding and the traveling wave coil winding are both fixed in the mounting cavity of the annular housing to generate an annular magnetic field and a traveling wave magnetic field, respectively;

[0012] A junction box is fixed to the outer wall of the composite electromagnetic stirrer, and the junction box is electrically connected to the annular coil winding and the traveling wave coil winding; the junction box is communicatively connected to a host computer so that the annular coil winding and the traveling wave coil winding are fed simultaneously or separately.

[0013] The beneficial effect of the technical solution of the present invention is that the mounting seat is slidably connected to the three-dimensional movable frame to realize multi-dimensional movement, the drainage tube runs through the mounting seat, and the mounting seat is moved to correspond to the sand mold and the molten metal is injected for casting; the junction box realizes the power supply of the composite electromagnetic stirrer, and the upper computer controls the power supply to the annular coil winding and the traveling wave coil winding, so that the composite electromagnetic stirrer has a stirring function in multiple modes; when the flow rate of the molten metal is too high, the electromagnetic force of the traveling wave magnetic field drives the molten metal to move in a directional manner, so that the molten metal is transmitted smoothly, avoiding defects such as oxidation and air absorption caused by turbulence, and reducing the generation of pores in the casting; the rotating magnetic field induces eddy currents in the molten metal, generates Lorentz force, and drives the molten metal to move in a directional or turbulent manner. This stirring action can break up dendrites, increase nucleation cores, promote the formation of equiaxed crystals, and make the grains after solidification finer.

[0014] Preferably, the annular housing is an annular shell, and a mounting cavity is defined between the annular outer wall and the annular inner wall of the annular housing; the annular inner wall is sleeved onto the outer wall of the drainage tube, and the annular coil winding and the traveling wave coil winding are both secured within the mounting cavity. The annular housing serves as a shield for the annular coil winding and the traveling wave coil winding, ensuring full utilization of the electromagnetic forces of the annular magnetic field and the traveling wave magnetic field.

[0015] Preferably, a gap is provided between the inner surface of the annular coil winding and the annular inner wall; a plurality of traveling wave coil windings are provided, and the plurality of traveling wave coil windings are fixed in an array on the outer surface of the annular coil winding. The traveling wave coil winding and the annular coil winding have a compact structure, which can reduce the structural size of the composite electromagnetic stirrer and reduce production costs.

[0016] Preferably, annular baffles are fixed to both the upper and lower ends of the inner ring surface of the annular coil winding. The side end surface of the baffle away from the annular coil winding is fixed to the annular inner wall. The baffle can achieve the separation between the annular coil winding and the annular inner wall of the annular housing, ensuring the effective generation of electromagnetic force.

[0017] Preferably, the drain pipe includes a pipe body and a connector pipe; the pipe body is funnel-shaped, and the connector pipe is bowl-shaped; the small head end of the pipe body penetrates through the mounting seat and inserts into the inner cavity of the connector pipe; there is a drain channel that communicates with each other at both ends of the pipe body and the connector pipe. The funnel-shaped pipe body can better receive the molten metal and prevent the splashing of the molten metal. The molten metal can be better injected into the sand mold through the bowl-shaped connector pipe.

[0018] Preferably, a cross groove is provided at the small head end of the pipe body; an outer edge is circumferentially fixed to the bowl mouth of the connector pipe, and an overflow port corresponding to and communicating with the cross groove is provided on the outer edge. When the molten metal flows out from the overflow port, it indicates the end of pouring, and pouring can be stopped. This can not only improve the process yield of the casting, but also increase the number of uses of the molten metal drain pipe. Even after the molten metal solidifies, the drain pipe can still be safely removed.

[0019] Preferably, an annular boss is fixed to the inner wall of the connector pipe, and a stepped surface is formed between the top surface of the boss and the inner wall of the outer edge; the small head end of the pipe body is located in the annular cavity of the boss. The annular cavity of the annular boss can better install the small head end of the pipe body, ensuring the continuity of the casting process.

[0020] Preferably, the three-dimensional moving frame includes a bottom plate, a vertical plate, and a support frame; there are two bottom plates, which are symmetrically arranged on both sides of the casting platform respectively; the lower end of the vertical plate is slidably connected to the top surface of the bottom plate for Y-direction movement; a sliding hole is provided at the upper end of the vertical plate; a column is fixed to the lower end of the support frame; the column is slidably connected in the sliding hole for Z-direction movement; the mounting seat is slidably connected to the support frame for X-direction movement. The three-dimensional moving frame can enable the drain pipe to move in multiple dimensions, ensuring that the drain pipe can be directly opposite to the sand mold and ensuring the casting process.

[0021] Preferably, a tenon groove along the Y direction is provided on the top surface of the bottom plate; a tenon block that can slide along the tenon groove is fixed to the lower end of the vertical plate. The vertical plate moves in the form of a tenon block and a tenon groove, and the moving process is more stable.

[0022] Preferably, the sand mold is integrally printed and formed by a 3D printing device. Using 3D printing technology can avoid complex processes such as making wooden molds and filling sand in sand mold casting.

[0023] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a black metal electromagnetic-assisted casting device. After the sand mold is transported to the casting platform through the casting production line, the three-dimensional moving platform carries the electromagnetic stirrer and moves to the upper part of the sand mold. The drain pipe shaft is collinear with the electromagnetic stirrer shaft, and the composite electromagnetic stirrer is sleeved on the drain pipe. The drain pipe is used for draining the molten metal to prevent the high-temperature molten metal from directly contacting the composite electromagnetic stirrer and causing damage. The traveling magnetic field can promote or inhibit the flow of the molten metal. For example, when the flow rate of the molten metal is too high, the electromagnetic force generated by the traveling magnetic field drives the directional movement of the molten metal, enabling the stable transmission of the molten metal and avoiding defects such as oxidation and gas absorption caused by turbulence, and reducing the generation of pores in the casting. The rotating magnetic field induces eddy currents in the molten metal, generates Lorentz force, and drives the directional or turbulent movement of the molten metal. This stirring effect can break dendrites, increase the nucleation cores, promote the formation of equiaxed crystals, make the solidified grains finer, and make the formed metal casting have high quality, low cost and high yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0025] Figure 1 Structural schematic diagram of the casting device provided by the present invention;

[0026] Figure 2 Structural schematic diagram of the cooperation between the drain pipe and the composite electromagnetic stirrer provided by the present invention;

[0027] Figure 3 is Figure 2 Structural schematic diagram of the composite electromagnetic stirrer after removing the annular outer shell in;

[0028] Figure 4 Structural schematic diagram of the annular coil winding and the traveling wave coil winding provided by the present invention;

[0029] Figure 5 Cross-sectional schematic diagram of the composite electromagnetic stirrer provided by the present invention;

[0030] Figure 6 Structural schematic diagram of the pipe body provided by the present invention;

[0031] Figure 7 Structural schematic diagram of the adapter pipe provided by the present invention.

[0032] Wherein,

[0033] 1 - Three - dimensional moving frame; 11 - Bottom plate; 111 - Mortise groove; 12 - Vertical plate; 13 - Support frame; 14 - Mounting seat;

[0034] 2 - Composite electromagnetic stirrer; 21 - Annular outer shell; 22 - Annular coil winding; 23 - Traveling - wave coil winding;

[0035] 3 - Drainage tube; 31 - Tube body; 311 - Funnel; 312 - Main tube; 313 - Cross - slot; 32 - Connecting tube; 321 - Liquid outlet tube; 322 - Outer edge; 323 - Overflow port; 324 - Boss;

[0036] 4 - Casting platform;

[0037] 5 - Sand mold;

[0038] 6 - Junction box. Specific implementation mode

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0040] An electromagnetic - assisted casting device for ferrous metals disclosed in an embodiment of the present invention includes:

[0041] A casting platform 4, on the top surface of the casting platform 4 there is a sand mold 5;

[0042] A three - dimensional moving frame 1, the casting platform 4 is located inside the three - dimensional moving frame 1; the top end of the three - dimensional moving frame 1 is slidably connected with a mounting seat 14;

[0043] A drainage tube 3, the upper end of the drainage tube 3 receives molten metal, and the lower end vertically penetrates through the mounting seat 14 and corresponds to the sand mold 5 to inject molten metal for workpiece casting;

[0044] A composite electromagnetic stirrer 2, the composite electromagnetic stirrer 2 includes an annular outer shell 21, an annular coil winding 22 and a traveling - wave coil winding 23; the annular outer shell 21 is fixed on the mounting seat 14 and sleeved on the outer wall of the drainage tube 3; both the annular coil winding 22 and the traveling - wave coil winding 23 are fixed in the installation cavity of the annular outer shell 21 to generate an annular magnetic field and a traveling - wave magnetic field respectively;

[0045] A junction box 6, the junction box 6 is fixed on the outer wall of the composite electromagnetic stirrer 2 and is electrically connected thereto; the junction box 6 is communicatively connected to a host computer so that the annular coil winding 22 and the traveling - wave coil winding 23 are simultaneously powered or separately powered.

[0046] Such as Figure 1 And2 As shown, a through hole is provided on the mounting seat, and the lower end of the drainage tube passes through the through hole and can be inserted into the sand mold. The molten metal is received by the drainage tube, which can avoid direct contact between the molten metal and the composite electromagnetic stirrer, thereby preventing damage to the electromagnetic stirrer caused by the high-temperature molten metal; the traveling wave magnetic field and the annular magnetic field generated by the electromagnetic stirrer can electromagnetically stir the molten metal. When the flow rate of the molten metal is too high, the electromagnetic force generated by the traveling wave magnetic field drives the molten metal to move in a directional manner, so that the molten metal is transmitted smoothly, avoiding defects such as oxidation and air absorption caused by turbulence, and reducing the generation of pores in the casting; the electromagnetic force generated by the rotating magnetic field has a stirring effect on the molten metal, which can promote the uniform nucleation and diffusion of the crystal nuclei, inhibit the excessive growth of the crystal nuclei, and make the grains after solidification finer.

[0047] The host computer in this embodiment can control the simultaneous feeding of the annular magnetic field and the traveling wave magnetic field or the separate feeding thereof, so that the composite electromagnetic stirrer has multiple stirring modes. The electromagnetic force generated by the traveling wave magnetic field can promote or inhibit the flow of the molten metal, and the electromagnetic force generated by the annular magnetic field can stir the molten metal.

[0048] In other specific embodiments, a water pipe is fixed on the junction box 6, and cooling water is injected into the water pipe to cool the casting.

[0049] In this embodiment, the annular outer wall and the annular inner wall of the annular shell 21 are arranged at intervals to form an installation cavity; the annular inner wall is sleeved on the outer wall of the drainage tube 3, and the annular coil winding 22 and the traveling wave coil winding 23 are both fixed in the installation cavity.

[0050] like Figures 3 - 5 As shown, the traveling wave coil winding and the annular coil winding are covered by an annular ring shell, which serves as a shielding cover for the traveling wave coil winding and the annular coil winding to ensure that the electromagnetic force of the magnetic field stirs the molten metal in the drainage tube.

[0051] In order to further optimize the above technical solution, there is a gap between the inner ring surface of the annular coil winding 22 and the annular inner wall; a plurality of traveling wave coil windings 23 are provided, and the plurality of traveling wave coil windings 23 are fixed in an array on the outer ring surface of the annular coil winding 22.

[0052] In order to further optimize the above technical solution, annular baffles 24 are fixed to the upper and lower ends of the inner ring surface of the annular coil winding 22 , and the baffles 24 are fixed to the annular inner wall away from the side end surface of the annular coil winding 22 .

[0053] A gap is formed between the inner ring surface of the annular coil winding and the annular inner wall of the annular shell through the baffle, thereby ensuring the performance of the composite electromagnetic stirrer.

[0054] In some other specific embodiments, the drain pipe 3 includes a pipe body 31 and a connector pipe 32; the pipe body 31 is funnel-shaped, and the connector pipe 32 is bowl-shaped; the small head end of the pipe body 31 penetrates through the mounting seat 14 and is inserted into the inner cavity of the connector pipe 32; both ends of the pipe body 31 and the connector pipe 32 have a drain channel communicating with each other.

[0055] As Figure 6 and 7 shown, the pipe body 31 includes a main pipe 312 and a funnel 311; the upper end of the main pipe 312 is integrally formed with the lower end of the funnel 311; the lower end of the main pipe 312 is inserted into the inner cavity of the upper end of the connector pipe 32; a liquid outlet pipe 321 is fixed to the lower end of the connector pipe 32, and the liquid outlet pipe 321 can be inserted into the sand mold 5 for casting molten metal.

[0056] To further optimize the above technical solution, a cross groove 313 is provided at the small head end of the pipe body 31; an outer edge 322 is circumferentially fixed to the bowl mouth of the connector pipe 32, and an overflow port 323 corresponding to and communicating with the cross groove 313 is provided on the outer edge 322.

[0057] In actual casting, a very long molten metal drain pipe is required. After casting, the ingot in the drain pipe cannot be taken out smoothly, so that the drain pipe needs to be replaced each time, and the operation efficiency is low; in addition, the excessive height of the drain pipe causes waste of molten steel and reduces the process yield after the casting solidifies; to ensure the feasibility of the electromagnetic assisted casting process, in this embodiment, the drain pipe and the connecting pipe are improved and optimized, and a cross groove and an overflow port are provided at the joint of the drain pipe and the connecting pipe. When the molten metal flows out from the cross groove through the overflow port, it indicates the end of casting, and the casting can be stopped; this design can not only improve the process yield of the casting, but also increase the number of times the molten steel drain pipe can be used, and the drain pipe can still be safely taken out even after the molten steel solidifies.

[0058] To further optimize the above technical solution, improve the effective connection between the pipe body and the connecting pipe, and prevent the overflow of molten metal during casting, an annular boss 324 is fixed to the inner wall of the connector pipe 32, and a stepped surface is formed between the top surface of the boss 324 and the inner wall of the outer edge 322; the small head end of the pipe body 31 is located in the annular cavity of the boss 324.

[0059] In this embodiment, the three-dimensional moving frame 1 includes a bottom plate 11, a vertical plate 12 and a support frame 13; the number of bottom plates 11 is two, and they are symmetrically arranged on both sides of the casting platform 4; the lower end of the vertical plate 12 is slidably connected to the top surface of the bottom plate 11 to move in the Y direction; a sliding hole is provided at the upper end of the vertical plate 12; a column 131 is fixed to the lower end of the support frame 13; the column 131 is slidably connected in the sliding hole to move in the Z direction; the mounting seat 14 is slidably connected to the support frame 13 to move in the X direction.

[0060] As Figure 1As shown, the mounting base can move in the X direction. The mounting base can move in the Z direction through the support frame and can move in the Y direction along with the vertical plate. A control unit is provided on the mounting base. By communicating with the numerical control system through the control unit, automatic movement of the mounting base and focusing with the sand mold can be achieved.

[0061] In this embodiment, the cross-section of the mounting base is concave, and the composite electromagnetic stirrer is located in the concave cavity of the mounting base. The concave cavity can ensure the stable fixation of the composite electromagnetic stirrer.

[0062] To further optimize the above technical solution, a mortise groove 111 along the Y direction is provided on the top surface of the bottom plate 11; a mortise block that can slide along the mortise groove 111 is fixed at the lower end of the vertical plate 12.

[0063] The vertical plate can achieve stable movement in the Y direction through the cooperation of the mortise block and the mortise groove on the bottom plate; sliding holes are provided at both ends of the vertical plate, and columns corresponding to the sliding holes are fixed at the bottom end of the support frame, and the columns can slide up and down along the sliding holes.

[0064] To further optimize the above technical solution, the sand mold 5 is integrally printed and formed by a 3D printing device.

[0065] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0066] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electromagnetic-assisted casting device for ferrous metals, characterized in that, Including: A casting platform (4), on the top surface of the casting platform (4) there is a sand mold (5); A three-dimensional moving frame (1), the casting platform (4) is located inside the three-dimensional moving frame (1); at the top end of the three-dimensional moving frame (1) there is a sliding connection with a mounting seat (14); A drain pipe (3), the upper end of the drain pipe (3) receives molten metal, and the lower end vertically penetrates the mounting seat (14) and corresponds to the sand mold (5) to inject molten metal for casting; A composite electromagnetic stirrer (2), the composite electromagnetic stirrer (2) includes an annular outer shell (21), an annular coil winding (22) and a traveling wave coil winding (23); the annular outer shell (21) is fixed on the mounting seat (14) and sleeved on the outer wall of the drain pipe (3); the annular coil winding (22) and the traveling wave coil winding (23) are both fixed in the installation cavity of the annular outer shell (21) to generate an annular magnetic field and a traveling wave magnetic field respectively; A junction box (6), the junction box (6) is fixed on the outer wall of the composite electromagnetic stirrer (2) and is electrically connected to it; the junction box (6) is communicatively connected to a host computer so that the annular coil winding (22) and the traveling wave coil winding (23) are simultaneously fed or separately fed individually.

2. The electromagnetic assisted casting device for ferrous metals according to claim 1, wherein The annular outer wall and the annular inner wall of the annular outer shell (21) are arranged at intervals to form the installation cavity; the annular inner wall is sleeved on the outer wall of the drain pipe (3), and the annular coil winding (22) and the traveling wave coil winding (23) are both fixed in the installation cavity.

3. The electromagnetic-assisted casting device for ferrous metals according to claim 2, characterized in that, There is a gap between the inner ring surface of the annular coil winding (22) and the annular inner wall; there are multiple traveling wave coil windings (23), and the multiple traveling wave coil windings (23) are fixedly arranged in an array on the outer ring surface of the annular coil winding (22).

4. The electromagnetic assisted casting device for ferrous metals according to claim 3, wherein At both the upper and lower ends of the inner ring surface of the annular coil winding (22), there are fixed annular baffles (24), and the side end surface of the baffle (24) away from the annular coil winding (22) is fixed to the annular inner wall.

5. The electromagnetic-assisted casting device for ferrous metals according to claim 1, wherein, The drain pipe (3) includes a pipe body (31) and a connecting pipe (32); the pipe body (31) is funnel-shaped, and the connecting pipe (32) is bowl-shaped; the small end of the pipe body (31) penetrates the mounting seat (14) and is inserted into the inner cavity of the connecting pipe (32); both ends of the pipe body (31) and the connecting pipe (32) have a communicating drainage channel.

6. The electromagnetic assisted casting device for ferrous metals according to claim 5, wherein, The small end of the pipe body (31) is provided with a cross groove (??); the outer edge (322) is fixedly arranged circumferentially at the bowl mouth of the connecting pipe (32), and an overflow port (323) corresponding to and communicating with the cross groove (??) is arranged on the outer edge (322).

7. An electromagnetic-assisted casting device for ferrous metals according to claim 6, characterized in that, An annular boss (324) is fixed on the inner wall of the connecting pipe (32), and a stepped surface is formed between the top surface of the boss (324) and the inner wall of the outer edge (322); the small end of the pipe body (31) is located in the annular cavity of the boss (324).

8. An electromagnetic-assisted casting device for ferrous metals according to any one of claims 1 to 7, characterized in that, The three-dimensional moving frame (1) includes a bottom plate (11), a vertical plate (12) and a support frame (13); the number of the bottom plates (11) is two and they are symmetrically arranged on both sides of the casting platform (4) respectively; the lower end of the vertical plate (12) is slidably connected to the top surface of the bottom plate (11) to perform Y-direction movement; a sliding hole is formed at the upper end of the vertical plate (12); a column (131) is fixed to the lower end of the support frame (13); the column (131) is slidably connected in the sliding hole to perform Z-direction movement; the mounting seat (14) is slidably connected to the support frame (13) to perform X-direction movement.

9. An electromagnetic assisted casting device for ferrous metals according to claim 8, characterized in that, A mortise groove (111) along the Y direction is formed on the top surface of the bottom plate (11); a mortise block that can slide along the mortise groove (111) is fixed to the lower end of the vertical plate (12).

10. The electromagnetic-assisted casting device for ferrous metals according to claim 1, wherein, The sand mold (5) is integrally printed and formed by a 3D printing device.

Citation Information

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