Structure of a metal containing chamber of an induction melting furnace

Abstract

The present invention relates to a structure of a metal containing chamber of an induction melting furnace. The structure of the metal containing chamber of the induction melting furnace comprises: a furnace body, which has a containing chamber for containing metal; an induction coil, which is used to generate an alternating current in the metal in the containing chamber when the metal is provided in the containing chamber; and a spoiler, whose outer peripheral wall comprises a first spiral protrusion, which is used to guide the metal in the containing chamber to flip upward or downward when the metal provided in the containing chamber is in a molten state. When the metal is provided in the containing chamber, the induction coil generates an alternating current in the metal to heat it into a molten state; then, under the action of the Lorentz force, the molten metal rotates, and the metal in the containing chamber is guided to flip upward or downward by the spoiler, which can improve the mixing state of some components in the molten metal, so as to improve the dispersion effect of the fibers and particle agglomerates, and make the molten metal components more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of metal casting, and in particular to the structure of a metal containing chamber of an induction melting furnace. Background Art

[0002] In the process of melting metal-based composite materials, such as fiber composite materials, in a traditional induction melting furnace, although the Lorentz force can make the molten metal rotate or even suspend in the containing chamber, the cavity wall of the containing chamber is smooth and there is no spoiler. Therefore, under the action of the Lorentz force, the rotation of the molten metal in the containing chamber is mostly laminar, and some components in the molten metal, such as The fibers, particle agglomerates, etc. are in a relatively static state with the molten metal and cannot achieve the purpose of homogenization.

[0003] In addition, the holding chamber of the traditional medium-frequency and high-frequency induction melting furnace mostly uses graphite crucible as the melting container. Due to the excellent electrical conductivity of graphite, most of its eddy current acts on the graphite crucible and heats it up, and then conducts and radiates heat to the metal material in the holding chamber; more importantly, due to the weakening of the Lorentz force, the molten metal in the holding chamber cannot produce a large-scale turbulent flow state, making it difficult to strengthen the homogenization of the molten metal components. Summary of the invention

[0004] In view of the above problems, the present invention is proposed to provide a structure of a metal containing chamber of an induction melting furnace that overcomes the above problems or at least partially solves the above problems.

[0005] The structure of the metal containing chamber of the induction melting furnace comprises:

[0006] a furnace body having a containing chamber for containing metal;

[0007] an induction coil, which is used to generate an alternating current in the metal in the containing chamber when the metal is provided in the containing chamber;

[0008] The spoiler has an outer peripheral wall including a first spiral protrusion, which is used to guide the metal in the containing chamber to turn upward or downward when the metal provided in the containing chamber is in a molten state.

[0009] Optionally, the inner peripheral wall of the containing chamber includes a second spiral protrusion, which is used to guide the metal in the containing chamber to flip under the action of the Lorentz force when the metal provided to the containing chamber is in a molten state; the second spiral protrusion has an opposite rotation direction to the first spiral protrusion.

[0010] Optionally, the inner peripheral wall of the accommodation chamber comprises protrusions for dispersing fibers and / or particle agglomerates in the metal flowing around the inner peripheral wall when the metal provided to the accommodation chamber is in a molten state.

[0011] Optionally, the protrusions are staggered in the horizontal direction.

[0012] Optionally, the furnace body includes a furnace bottom and a furnace wall, and the furnace wall is formed by stacking a number of furnace wall units; the space surrounded by the furnace bottom and the furnace wall forms the accommodating chamber.

[0013] Optionally, the furnace body includes a drainage channel connected to the containing chamber for discharging molten metal in the containing chamber; the structure of the metal containing chamber of the induction melting furnace also includes a plug rod, which is used to regulate the flow of molten metal in the drainage channel.

[0014] Optionally, the drainage channel is arranged at the bottom of the furnace.

[0015] Optionally, the spoiler includes a fluid channel, and the drainage channel is connected to the containing chamber via the fluid channel; the spoiler also includes a mounting hole, and the plug rod is inserted into the mounting hole and can move along the axial direction of the mounting hole to regulate the flow of molten metal in the drainage channel, and at the same time, the plug rod applies static pressure to the molten metal when it enters the mold cavity.

[0016] Optionally, the lower end of the spoiler is connected to the bottom of the accommodating chamber.

[0017] Optionally, the structure of the metal containing chamber of the induction melting furnace further includes a furnace cover for closing an upper end opening of the containing chamber.

[0018] Optionally, a positioning hole is provided at the bottom of the accommodation chamber, and the spoiler passes through the through hole on the furnace cover and is inserted into the positioning hole of the accommodation chamber.

[0019] Optionally, the spoiler is fixedly connected to the furnace cover.

[0020] Optionally, the structure of the metal containing chamber of the induction melting furnace further includes a gas channel for connecting the containing chamber with an external high-pressure gas source.

[0021] Optionally, the gas channel is arranged in the plug rod and can be communicated with the fluid channel.

[0022] Optionally, the structure of the metal containing chamber of the induction melting furnace further includes a device for conveying non-reactive gas to the containing chamber.

[0023] Optionally, the structure of the metal containing chamber of the induction melting furnace further includes a device for conveying reactive gas to the containing chamber.

[0024] Optionally, the furnace body is an insulator furnace body; and the spoiler is an insulator spoiler.

[0025] Optionally, the plug rod is an insulator plug rod.

[0026] The present invention has the following beneficial effects:

[0027] In this embodiment, when the metal is provided in the containing chamber, the induction coil generates an alternating current in the metal in the containing chamber, heating the metal into a molten state; then, under the action of the Lorentz force, the molten metal rotates, and the spoiler guides the metal in the containing chamber to an upward or downward turbulent state, which can change the mixing state of some components in the molten metal to improve The dispersion effect of fibers and particle agglomerates makes the molten metal composition more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0029] Figure 1 This is a schematic structural diagram of an embodiment of the structure of a metal containing chamber of an induction melting furnace of the present application;

[0030] Figure 2 for Figure 1 A schematic diagram of another state of the structure of the metal containing chamber of the induction melting furnace;

[0031] Figure 3 for Figure 1 A schematic cross-sectional view of the furnace wall, spoiler and plug rod of the structure of the metal containing chamber of the medium induction melting furnace;

[0032] Figure 4 This is a schematic structural diagram of another embodiment of the structure of the metal containing chamber of the induction melting furnace of the present application;

[0033] Figure 5 for Figure 4 A schematic diagram of the structure of the metal containing chamber of the induction melting furnace in another state.

[0034] Explanation of the accompanying drawings: 1. furnace body; 2. induction coil; 3. spoiler; 4. first spiral protrusion; 5. protrusion; 6. furnace bottom; 7. furnace wall; 8. drainage channel; 9. plug rod; 10. fluid channel; 11. furnace cover; 12. spoiler; 13. flange connection; 14. second spiral protrusion; 15. gas channel. DETAILED DESCRIPTION

[0035] The directional terms such as up, down, left, right, front, back, inside, outside, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In addition, the terms "include", "comprises" and any variations thereof are intended to cover non-exclusive inclusions.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] See first Figure 1 and Figure 2 , which shows an exemplary embodiment of the structure of the metal containing chamber of the induction melting furnace according to the present invention. The structure of the metal containing chamber of the induction melting furnace comprises a furnace body 1, an induction coil 2, and a spoiler 3.

[0039] The furnace body 1 is generally barrel-shaped, and the middle part thereof is concave to form a containing chamber for containing metals, such as aluminum alloy, magnesium alloy, etc. It should be understood that the furnace body 1 can also be designed into other suitable shapes.

[0040] The induction coil 2 is wrapped around the outer periphery of the furnace wall 7 of the furnace body 1. When the receiving chamber is provided with metal, the induction coil 2 is connected to an external power source and generates an alternating current in the metal in the receiving chamber, so that the metal is heated and melted. The molten metal (i.e., the metal in the molten state in the receiving chamber) rotates turbulently in the magnetic field generated by the induction coil 2 under the action of the Lorentz force, which affects some components in the molten metal, such as The molten metal is dispersed into fibers and particle agglomerates to homogenize the components of the molten metal.

[0041] The current inputted by the external power supply to the induction coil 2 is adjustable, such as turning the power supply on and off, changing the direction of the current, changing the frequency of the current, changing the magnitude of the current, etc. For example, the current inputted by the external power supply to the induction coil 2 is adjusted by the controller. The change of the current will cause the Lorentz force exerted on the molten metal to change accordingly. The sudden disappearance, change of direction, and change of magnitude of the Lorentz force will affect the flow direction and strength of the molten metal in the containing chamber, and can break up the fiber and particle agglomerates in the molten metal, so that the components of the molten metal tend to be uniform.

[0042] The spoiler 3 is arranged in the middle of the accommodation chamber, and its outer peripheral wall includes a first spiral protrusion 4. The molten metal rotates under the action of the Lorentz force and is turned upward or downward under the guidance of the first spiral protrusion 4, so that the molten metal forms an annular longitudinal turbulence, which can break up the fiber and particle agglomerates in the molten metal and make the composition of the molten metal tend to be uniform. It should be understood that the first spiral protrusion 4 can be a continuous spiral protrusion or can be formed by a plurality of separate protrusions.

[0043] In this embodiment, the inner peripheral wall of the accommodation chamber includes protrusions 5. The molten metal rotates under the action of the Lorentz force. The molten metal flowing through the protrusions 5 of the inner peripheral wall collides with the protrusions and forms turbulence, which further breaks up the fiber and particle agglomerates in the molten metal and makes the components of the molten metal tend to be uniform. The protrusions 5 of the inner peripheral wall can be regularly distributed or irregularly distributed. In this embodiment, the protrusions of the inner peripheral wall are regularly distributed.

[0044] Specifically, the furnace body 1 includes a furnace bottom 6 and a furnace wall 7, and the furnace wall 7 is formed by stacking a plurality of furnace wall 7 units. The space surrounded by the furnace bottom 6 and the furnace wall 7 forms the accommodation chamber. The protrusions 5 of the inner peripheral wall are arranged on the inner wall of the furnace wall 7 unit, and the protrusions 5 between adjacent furnace wall 7 units are staggered, such as Figure 3 shown.

[0045] Now back to Figure 1 and Figure 2The furnace body 1 also includes a drainage channel 8 connected to the receiving chamber, which is arranged at the furnace bottom 6 and is used to discharge the molten metal in the receiving chamber. The structure of the metal receiving chamber of the induction melting furnace also includes a plug rod 9, which is used to adjust the flow of the molten metal in the drainage channel 8. Figure 1 As shown, the molten metal is blocked from flowing out of the drainage channel 8, and as shown Figure 2 As shown, the molten metal is allowed to flow out of the drainage channel 8. Of course, the flow rate of the molten metal flowing out of the drainage channel 8 can also be adjusted. In this embodiment, the lower end of the plug rod 9 can move up and down in the drainage channel 8, so the plug rod 9 can also apply force to the molten metal in the drainage channel 8.

[0046] Specifically, the spoiler 3 further includes a fluid channel 10 and a mounting hole. The drainage channel 8 is connected to the accommodation chamber through the fluid channel 10. The mounting hole and the drainage channel 8 are located on the same vertical axis, and the plug rod 9 is plugged into the mounting hole and can move up and down along the axis of the mounting hole to adjust the flow of molten metal in the drainage channel 8. At the same time, the plug rod 9 applies static pressure to the molten metal when it enters the mold cavity.

[0047] In this embodiment, the furnace body 1, the spoiler 3, and the plug rod 9 are all made of insulating materials, or materials with very low conductivity at a temperature below the melting point of the provided metal, such as zirconium ceramic materials, aluminum titanate ceramic materials, corundum ceramic materials, etc. The eddy current generated by the current passing through the induction coil 2 can all act on the metal provided in the accommodation chamber, so the heating efficiency is high, and at the same time, the stirring effect of the Lorentz force on the molten metal can be strengthened, thereby improving the uniformity of the molten metal components.

[0048] The structure of the metal containing chamber of the induction melting furnace of this embodiment can heat the molten metal efficiently and make the composition of the molten metal uniform.

[0049] See first Figure 4 and Figure 5 , which shows an exemplary embodiment of the structure of the metal containing chamber of the induction melting furnace according to the present invention. The structure of the metal containing chamber of the induction melting furnace comprises a furnace body 1, an induction coil 2, and a spoiler 3.

[0050] The furnace body 1 is generally barrel-shaped, and includes a furnace bottom 6 and a furnace wall 7. The space surrounded by the furnace bottom 6 and the furnace wall 7 forms a containing chamber for containing metals, such as aluminum alloys, magnesium alloys, etc. In this embodiment, the structure of the metal containing chamber of the induction melting furnace also includes a furnace cover 11, and the furnace cover 11 can close the upper end opening of the containing chamber, so that the containing chamber becomes a closed or correspondingly closed space. It should be understood that the furnace body 1 can also be designed into other suitable shapes.

[0051] The induction coil 2 is wrapped around the outer periphery of the furnace wall 7 of the furnace body 1. When the receiving chamber is provided with metal, the induction coil 2 is connected to an external power source and generates an alternating current in the metal in the receiving chamber, so that the metal is heated and melted. The molten metal (i.e., the metal in the molten state in the receiving chamber) rotates turbulently in the magnetic field generated by the induction coil 2 under the action of the Lorentz force, which affects some components in the molten metal, such as The molten metal is dispersed into fibers and particle agglomerates to homogenize the components of the molten metal.

[0052] The current inputted by the external power supply to the induction coil 2 is adjustable, such as turning the power supply on and off, changing the direction of the current, changing the frequency of the current, changing the magnitude of the current, etc. For example, the current inputted by the external power supply to the induction coil 2 is adjusted by the controller. The change of the current will cause the Lorentz force exerted on the molten metal to change accordingly. The sudden disappearance, change of direction, and change of magnitude of the Lorentz force will affect the flow direction and strength of the molten metal in the containing chamber, and can break up the fiber and particle agglomerates in the molten metal, so that the components of the molten metal tend to be uniform.

[0053] The spoiler 3 is arranged in the middle of the accommodation chamber, and its outer peripheral wall includes a first spiral protrusion 4. The molten metal rotates under the action of the Lorentz force and is turned upward or downward under the guidance of the first spiral protrusion 4, so that the molten metal forms an annular longitudinal turbulence, which can break up the fiber and particle agglomerates in the molten metal and make the composition of the molten metal tend to be uniform. It should be understood that the first spiral protrusion 4 can be a continuous spiral protrusion or can be formed by a plurality of separate protrusions.

[0054] Specifically, the spoiler 3 includes a spoiler portion 12, and the first spiral protrusion 4 is arranged on the outer peripheral wall of the spoiler portion 12; the spoiler portion 12 passes through the through hole on the furnace cover 11 and is inserted into the positioning hole at the center of the bottom of the accommodation chamber. The spoiler 3 also includes a flange connection portion 13, the upper end of the spoiler portion 12 is connected to the flange connection portion 13, and is fixedly connected to the furnace cover 11 through the flange connection portion 13.

[0055] In this embodiment, the inner peripheral wall of the containing chamber includes a second spiral protrusion 14. The molten metal rotates under the action of the Lorentz force and is turned upward or downward under the guidance of the second spiral protrusion 14, so that the molten metal forms an annular longitudinal turbulence, which can break up the fibers and particle agglomerates in the molten metal and make the components of the molten metal uniform. Preferably, the second spiral protrusion rotates in the opposite direction to the first spiral protrusion. When the first spiral protrusion 4 guides the molten metal to turn upward, the second spiral protrusion 14 guides the molten metal to turn downward; when the first spiral protrusion 4 guides the molten metal to turn downward, the second spiral protrusion 14 guides the molten metal to turn upward. Therefore, the annular longitudinal turbulence promoted by the first spiral protrusion 4 and the annular longitudinal turbulence promoted by the second spiral protrusion 14 produce a longitudinal intersection. At the same time, under the action of the Lorentz force, the molten metal at the intersection can form a complex turbulence, which further homogenizes the fibers and particle agglomerates in the molten metal. Likewise, the second spiral protrusion 14 may be a continuous spiral protrusion, or may be formed by a plurality of separate protrusions.

[0056] The furnace body 1 also includes a drainage channel 8 connected to the receiving chamber, which is arranged at the furnace bottom 6 and is used to discharge the molten metal in the receiving chamber. The structure of the metal receiving chamber of the induction melting furnace also includes a plug rod 9, which is used to adjust the flow of the molten metal in the drainage channel 8. Figure 4 As shown, the molten metal is blocked from flowing out of the drainage channel 8, and as shown Figure 5 As shown, the molten metal is allowed to flow out of the drainage channel 8. Of course, the flow rate of the molten metal flowing out of the drainage channel 8 can also be adjusted. In this embodiment, the lower end of the plug rod 9 can move up and down in the drainage channel 8, so the plug rod 9 can also apply force to the molten metal in the drainage channel 8.

[0057] Specifically, the spoiler 3 further includes a fluid channel 10 and a mounting hole. The drainage channel 8 is connected to the accommodation chamber through the fluid channel 10. The mounting hole and the drainage channel 8 are located on the same vertical axis, and the plug rod 9 is plugged into the mounting hole and can move up and down along the axis of the mounting hole to adjust the flow of molten metal in the drainage channel 8. At the same time, the plug rod 9 applies static pressure to the molten metal when it enters the mold cavity.

[0058] In this embodiment, the structure of the metal containing chamber of the induction melting furnace further includes a gas channel 15 for connecting the containing chamber and an external high-pressure gas source. Specifically, the gas channel 15 is arranged in the plug rod 9 and can be connected to the fluid channel 10, such as Figure 4 The output end of the external high pressure gas source is connected to the inlet of the gas channel 15 at the upper end of the plug rod 9, and the gas channel 15 is in Figure 4When the chamber is in the state of being connected to the fluid channel 10, a non-reactive gas such as an inert gas can be introduced into the chamber, or a reactive gas such as oxygen can be introduced into the chamber, or a gas and nano-metal powder can be introduced into the chamber.

[0059] Preferably, the fluid channel 10 is arranged near the bottom wall of the accommodation chamber. On the one hand, the input gas can cause the molten metal to form turbulence at the bottom of the accommodation chamber, further homogenizing the fibers and particle agglomerates in the molten metal; on the other hand, the bubbles generated by the input gas meet the suspended slag during the floating process, and the slag is adsorbed on the surface of the bubbles and brought to the surface of the molten metal, which can effectively remove the slag; on the other hand, when the input gas is an inert gas, it can effectively remove oxygen and water molecules above the surface of the molten metal.

[0060] In an alternative embodiment, the structure of the metal containing chamber of the induction melting furnace further includes a device for conveying non-reactive gas to the containing chamber, and the output end of the device is connected to the inlet of the gas channel 15 at the upper end of the stopper rod 9 .

[0061] In another alternative embodiment, the structure of the metal containing chamber of the induction melting furnace further includes a device for conveying reactive gas to the containing chamber, and the output end of the device is connected to the inlet of the gas channel 15 at the upper end of the stopper rod 9 .

[0062] In this embodiment, the furnace body 1, spoiler 3, plug rod 9, and furnace cover 11 are all made of insulating materials, or materials with very low conductivity at a temperature below the melting point of the provided metal, such as zirconium ceramic materials, aluminum titanate ceramic materials, corundum ceramic materials, etc. The eddy current generated by the current passing through the induction coil 2 can all act on the metal provided in the accommodation chamber, so the heating efficiency is high, and at the same time, the stirring effect of the Lorentz force on the molten metal can be strengthened, thereby improving the uniformity of the molten metal components.

[0063] The structure of the metal containing chamber of the induction melting furnace of this embodiment can heat the molten metal efficiently and make the composition of the molten metal uniform.

[0064] The above-mentioned embodiments only express some implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A structure of a metal containing chamber of an induction melting furnace, characterized in that: include: a furnace body having a containing chamber for containing metal; an induction coil, which is used to generate an alternating current in the metal in the containing chamber when the metal is provided in the containing chamber; A spoiler, whose outer peripheral wall comprises a first spiral protrusion, which is used to guide the metal in the containing chamber to turn upward or downward when the metal provided in the containing chamber is in a molten state; and a furnace cover for closing the upper end opening of the containing chamber; The furnace body includes a liquid discharge channel connected to the receiving chamber for discharging the molten metal in the receiving chamber; the structure of the metal receiving chamber of the induction melting furnace also includes a plug rod, which is used to adjust the flow of the molten metal in the liquid discharge channel; The spoiler includes a fluid channel, and the drainage channel is connected to the accommodating chamber via the fluid channel; the spoiler also includes a mounting hole, and the plug rod is inserted into the mounting hole and can move along the axial direction of the mounting hole to regulate the flow of molten metal in the drainage channel. At the same time, the plug rod applies static pressure to the molten metal when it enters the mold cavity.

2. The structure of the metal containing chamber of the induction melting furnace according to claim 1 is characterized in that: The inner peripheral wall of the containing chamber includes a second spiral protrusion, which is used to guide the metal in the containing chamber to flip under the action of the Lorentz force when the metal provided to the containing chamber is in a molten state; the second spiral protrusion has an opposite rotation direction to the first spiral protrusion.

3. The structure of the metal containing chamber of the induction melting furnace according to claim 1, characterized in that: The inner peripheral wall of the accommodation chamber comprises protrusions for dispersing fibers and / or particle agglomerates in the metal flowing around the inner peripheral wall when the metal provided to the accommodation chamber is in a molten state.

4. The structure of the metal containing chamber of the induction melting furnace according to claim 3 is characterized in that: The protrusions are staggeredly distributed in the horizontal direction.

5. The structure of the metal containing chamber of the induction melting furnace according to claim 4, characterized in that: The furnace body comprises a furnace bottom and a furnace wall, wherein the furnace wall is formed by stacking a number of furnace wall units; the space surrounded by the furnace bottom and the furnace wall forms the accommodation chamber.

6. The structure of the metal containing chamber of the induction melting furnace according to claim 1, characterized in that: It also includes a gas channel for connecting the containing chamber and an external high-pressure gas source.

7. The structure of the metal containing chamber of the induction melting furnace according to any one of claims 1 to 6, characterized in that: The structure of the metal containing chamber is the structure of an insulator metal containing chamber.

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