Ultrasonic degassing device for aluminum alloy casting
By using an ultrasonic degassing device to remove gas from molten aluminum through cavitation, the problems of frequent replacement and high-temperature consumption of graphite rotor degassing devices are solved, enabling efficient and low-cost aluminum alloy casting and improving the purity and density of aluminum alloys.
Patent Information
- Application Number
- CN202520263992.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Existing graphite rotor degassing devices are easily damaged in aluminum alloy casting, leading to frequent component replacements, high consumption of inert gas, high production costs, and low degassing efficiency, making it difficult to meet the needs of high-efficiency production. At the same time, they require high-temperature operation, which increases energy consumption.
An ultrasonic degassing device is used to generate cavitation effect in molten aluminum through an ultrasonic transducer. This cavitation effect removes gases from the molten aluminum, promotes the reaction of fluoride salt solutions, reduces oxide film formation, and improves the casting quality of aluminum alloys.
To improve the casting quality of aluminum alloys, reduce gas consumption, lower production costs, meet the needs of high-efficiency production, avoid oxide film inclusions, and improve the purity and density of aluminum alloys.
Smart Images
Figure CN223616729U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aluminum alloy casting technology, specifically to an ultrasonic degassing device for aluminum alloy casting. Background Technology
[0002] Aluminum alloys, due to their lightweight, high strength, corrosion resistance, and good machinability, are widely used in aerospace, automotive manufacturing, rail transportation, and electronics industries. With the increasing demands for material performance in modern industry, the internal quality (such as purity and density) and mechanical properties (such as strength and toughness) of aluminum alloy castings have become core indicators determining their reliability. However, during the smelting and casting process of aluminum alloys, the melt is prone to micro-defects such as porosity and shrinkage porosity due to defects such as hydrogen absorption, oxide inclusions, and impurities, which seriously affect the service performance of the material.
[0003] In the continuous casting process of aluminum alloys, molten metal needs to be transported from the melting furnace (such as an induction furnace) to the continuous casting machine through a flow channel, and purification treatment is completed before solidification. The traditional graphite rotor degassing device is the mainstream technology in this process. Its working principle relies on the high-speed rotating graphite rotor to break inert gases (such as argon and nitrogen) into micron-sized bubbles, and use the buoyancy of the bubbles to adsorb hydrogen and oxide inclusions in the melt, thereby achieving impurity removal and purification.
[0004] However, when using a graphite rotor degassing device to cast aluminum alloys, the graphite rotor is exposed to high-temperature molten aluminum for a long time, which makes it prone to failure due to oxidation, erosion and mechanical wear. In particular, the junction between the liquid surface and the rotor rod is prone to thinning and fracture, requiring frequent replacement of parts. In addition, the consumption of inert gas is large, which further increases the production cost. Moreover, the graphite rotor takes a long time to achieve the ideal degassing effect, which is difficult to meet the requirements of high-efficiency continuous production. At the same time, in order to maintain the gas diffusion rate, the melt temperature needs to be raised to a high level, resulting in additional energy consumption.
[0005] Therefore, in order to address the above problems, the applicant needs to design an ultrasonic degassing device for aluminum alloy casting to solve the problem. Summary of the Invention
[0006] The purpose of this invention is to provide an ultrasonic degassing device for aluminum alloy casting, so as to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution: an ultrasonic degassing device for aluminum alloy casting, comprising a base,
[0008] It also includes: a support base mounted on the base, with an induction furnace for producing molten aluminum mounted on the top surface of the support base; a connecting mechanism at the output end of the induction furnace for removing gas from the molten aluminum; a continuous casting machine for casting aluminum ingots connected to the end of the connecting mechanism away from the induction furnace; the bottom surface of the continuous casting machine being fixedly connected to the top surface of the base; the connecting mechanism including a flow channel, with an ultrasonic transducer for degassing mounted on the flow channel; a partition plate arranged vertically inside the flow channel, dividing the internal space of the flow channel into a buffer chamber and a degassing chamber; a valve mechanism inside the partition plate for controlling the flow of molten aluminum from the degassing chamber to the buffer chamber.
[0009] Furthermore, an outflow pipe is provided inside the degassing chamber, and the end of the outflow pipe away from the degassing chamber is fixedly connected to the output end of the induction furnace through a flange.
[0010] The above structural design allows for easy connection between the flow channel and the induction furnace via the outflow pipe, facilitating the flow of molten aluminum from the induction furnace to the degassing chamber.
[0011] Furthermore, a connecting pipe is provided inside the buffer cavity, and the end of the connecting pipe away from the buffer cavity is fixedly connected to the input end of the continuous casting machine through a flange.
[0012] The above structural design facilitates the connection between the flow channel and the continuous casting machine via connecting pipes, allowing molten aluminum to flow from the buffer chamber to the continuous casting machine.
[0013] Furthermore, the valve mechanism includes a gate, and the inner surface of the gate is slidably connected to the outer surface of the partition plate. A telescopic rod is fixedly installed inside the gate, and a cylinder is installed at the end of the telescopic rod away from the gate.
[0014] With the above structural design, when in use, the cylinder can be started to move the telescopic rod, and the movement of the telescopic rod can move the gate, controlling the flow of molten aluminum in the degassing chamber to the buffer chamber.
[0015] Furthermore, a sealing chamber is provided on the outside of the cylinder, and the top surface of the sealing chamber is fixedly connected to the top surface of the flow channel.
[0016] The above structural design allows for easy cylinder installation using a sealed chamber, while also protecting the cylinder's safety.
[0017] Furthermore, a reinforcing plate is fixedly installed on the outer side of the cylinder, and the reinforcing plate is fixedly connected to the inner surface of the sealing chamber.
[0018] The above structural design utilizes reinforcing rods to facilitate cylinder support, thereby improving the stability and robustness of the cylinder during use.
[0019] Furthermore, a support plate is provided on the outer side of the ultrasonic transducer, and a support rod is fixedly provided on the bottom surface of the support plate, with the end of the support rod away from the support plate being fixedly connected to the top surface of the flow channel.
[0020] The above structural design utilizes a support plate and support rod to facilitate the support of the ultrasonic transducer, thereby improving the stability of the ultrasonic transducer.
[0021] Compared with the prior art, the beneficial effects of this utility model are: the ultrasonic degassing device for aluminum alloy casting can remove gas from the molten aluminum during the aluminum alloy casting process, thereby improving the casting quality of the aluminum alloy. The specific details are as follows:
[0022] 1. When using this ultrasonic degassing device for aluminum alloy casting, the gate is closed, allowing the molten aluminum in the induction furnace to flow into the flow channel through the outflow pipe. Then, the ultrasonic transducer is immersed in the molten aluminum, utilizing the cavitation effect to remove gas from the melt. The ultrasonic acoustic flow effect can promote the stirring and mixing of the melt, making the gas in the melt more evenly distributed and facilitating gas escape. At the same time, the ultrasonic transducer can also promote the continued reaction of some unreacted fluoride salt solutions in the molten aluminum. Since the density of the fluoride salt solution is lower than that of the molten aluminum, after ultrasonic degassing, the remaining fluoride salt will float on the surface of the molten aluminum, reducing impurities in the molten aluminum. In addition, the ultrasonic acoustic flow effect can also reduce the formation of oxide film on the surface of the melt, preventing oxide film from being drawn into the melt and causing inclusion defects, thereby improving the casting quality of aluminum alloy.
[0023] 2. When using this ultrasonic degassing device for aluminum alloy casting, the cylinder is activated, which facilitates the movement of the telescopic rod. The movement of the telescopic rod facilitates the movement of the gate, thereby controlling whether the molten aluminum in the degassing chamber flows to the buffer chamber. It is easy to operate and has high working efficiency. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;
[0025] Figure 2 This is a three-dimensional structural diagram of the connecting mechanism of this utility model;
[0026] Figure 3 This is a schematic diagram of the connection structure between the ultrasonic transducer and the support plate of this utility model;
[0027] Figure 4 This is a three-dimensional sectional view of the connecting mechanism of this utility model;
[0028] Figure 5 This is a three-dimensional structural diagram of the valve mechanism of this utility model.
[0029] In the diagram: 1. Base; 2. Connecting mechanism; 3. Valve mechanism; 10. Support base; 11. Induction furnace; 12. Continuous casting machine; 20. Outflow pipe; 21. Flow channel; 22. Connecting pipe; 23. Ultrasonic transducer; 24. Support plate; 25. Support rod; 26. Divider plate; 27. Buffer chamber; 28. Degassing chamber; 30. Gate; 31. Telescopic rod; 32. Cylinder; 33. Sealing chamber; 34. Reinforcing plate. Detailed Implementation
[0030] 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.
[0031] like Figures 1-5 As shown, this utility model discloses an ultrasonic degassing device for aluminum alloy casting, comprising a base 1, and further comprising: a support base 10 disposed on the base 1, wherein an induction furnace 11 for producing molten aluminum is disposed on the top surface of the support base 10, a connecting mechanism 2 is disposed at the output end of the induction furnace 11, and the connecting mechanism 2 is used to remove gas from the molten aluminum, wherein the end of the connecting mechanism 2 away from the induction furnace 11 is connected to an existing continuous casting machine 12 for casting aluminum ingots, and the bottom surface of the continuous casting machine 12 is fixedly connected to the top surface of the base 1, the connecting mechanism 2 includes a flow channel 21, and an ultrasonic transducer 23 for degassing is disposed on the flow channel 21, the ultrasonic transducer 23 being an existing device that degasses the molten metal by emitting ultrasonic waves, and a partition plate 26 is disposed vertically inside the flow channel 21. Furthermore, the partition plate 26 divides the internal space of the flow channel 21 into a buffer chamber 27 and a degassing chamber 28. A valve mechanism 3 is provided inside the partition plate 26, and the valve mechanism 3 is used to control the flow of aluminum liquid in the degassing chamber 28 to the buffer chamber 27. An outlet pipe 20 is provided in the degassing chamber 28, and the end of the outlet pipe 20 away from the degassing chamber 28 is fixedly connected to the output end of the induction furnace 11 through a flange. A connecting pipe 22 is provided in the buffer chamber 27, and the end of the connecting pipe 22 away from the buffer chamber 27 is fixedly connected to the input end of the continuous casting machine 12 through a flange. A support plate 24 is provided on the outside of the ultrasonic transducer 23, and a support rod 25 is fixedly provided on the bottom surface of the support plate 24, and the end of the support rod 25 away from the support plate 24 is fixedly connected to the top surface of the flow channel 21.
[0032] Through the above structural design, during use, the ultrasonic transducer 23 is immersed in the molten aluminum. The cavitation effect is used to remove the gas in the molten liquid. The ultrasonic acoustic flow effect can promote the stirring and mixing of the molten liquid, making the gas in the molten liquid more evenly distributed and facilitating the escape of the gas. At the same time, the ultrasonic transducer 23 can also promote the continued reaction of some of the unreacted fluoride salt solution in the molten aluminum. The local high temperature and high pressure environment generated by ultrasonic cavitation can provide additional energy for the fluoride salt reaction, reduce the activation energy of the reaction, and allow the reaction that originally required higher temperature or longer time to occur to proceed quickly under relatively mild conditions. Since the density of the fluoride salt solution is lower than that of the molten aluminum, after ultrasonic degassing, the remaining fluoride salt will float on the surface of the molten aluminum, reducing impurities in the molten aluminum. In addition, the ultrasonic acoustic flow effect can also reduce the formation of oxide film on the surface of the molten liquid, avoiding the oxide film from being drawn into the molten liquid and causing inclusion defects, thereby improving the casting quality of aluminum alloy.
[0033] The valve mechanism 3 includes a gate 30, and the inner surface of the gate 30 is slidably connected to the outer surface of the partition plate 26. A telescopic rod 31 is fixedly installed inside the gate 30, and a cylinder 32 is installed at the end of the telescopic rod 31 away from the gate 30. A sealing chamber 33 is installed on the outside of the cylinder 32, and the top surface of the sealing chamber 33 is fixedly connected to the top surface of the flow channel 21. A reinforcing plate 34 is fixedly installed on the outside of the cylinder 32, and the reinforcing plate 34 is fixedly connected to the inner surface of the sealing chamber 33.
[0034] With the above structural design, when the molten aluminum is refined in the degassing chamber 28, the cylinder 32 is activated. The activation of the cylinder 32 facilitates the movement of the telescopic rod 31, which in turn facilitates the movement of the gate 30, controlling the flow of the molten aluminum in the degassing chamber 28 to the buffer chamber 27. The molten aluminum in the buffer chamber 27 will then enter the continuous casting machine 12 for processing through the connecting pipe 22. The operation is convenient and the work efficiency is high.
[0035] Working Principle: When using this ultrasonic degassing device for aluminum alloy casting, the gate 30 is closed, allowing the molten aluminum in the induction furnace 11 to flow into the flow channel 21 through the outlet pipe 20. Then, the ultrasonic transducer 23 is immersed in the molten aluminum, utilizing the cavitation effect to remove gas from the melt. The ultrasonic flow effect promotes stirring and mixing of the melt, resulting in a more uniform gas distribution and facilitating gas escape. Simultaneously, the ultrasonic transducer 23 can also promote the continued reaction of some unreacted fluoride salt solutions in the molten aluminum. The localized high-temperature and high-pressure environment generated by ultrasonic cavitation provides additional energy for the fluoride salt reaction, lowering the activation energy and allowing reactions that would normally require higher temperatures or longer durations to occur to proceed more quickly. Under mild conditions, the process is rapid. Since the density of the fluoride salt solution is lower than that of the aluminum liquid, after ultrasonic degassing, the remaining fluoride salt will float on the surface of the aluminum liquid, reducing impurities in the aluminum liquid. In addition, the ultrasonic flow effect can also reduce the formation of oxide film on the surface of the melt, avoiding the oxide film from being rolled into the melt and causing inclusion defects, thereby improving the casting quality of aluminum alloy. After the aluminum liquid is refined in the degassing chamber 28, the cylinder 32 is started. The start of the cylinder 32 facilitates the movement of the telescopic rod 31, and the movement of the telescopic rod 31 facilitates the movement of the gate 30, controlling the flow of aluminum liquid in the degassing chamber 28 to the buffer chamber 27. The aluminum liquid in the buffer chamber 27 will enter the continuous casting machine 12 for processing through the connecting pipe 22. The operation is convenient and the work efficiency is high.
[0036] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. An ultrasonic degassing device for aluminum alloy casting, comprising a base (1). Its features are, Also includes: A support base (10) is provided on the base (1), and an induction furnace (11) for producing aluminum liquid is provided on the top surface of the support base (10). A connecting mechanism (2) is provided at the output end of the induction furnace (11), and the connecting mechanism (2) is used to remove gas from the aluminum liquid. The end of the connecting mechanism (2) away from the induction furnace (11) is connected to a continuous casting machine (12) for casting aluminum ingots. The bottom surface of the continuous casting machine (12) is fixedly connected to the top surface of the base (1). The connecting mechanism (2) includes a flow channel (21), and an ultrasonic transducer (23) for degassing is provided on the flow channel (21). A partition plate (26) is provided in the vertical direction inside the flow channel (21), and the partition plate (26) divides the internal space of the flow channel (21) into a buffer chamber (27) and a degassing chamber (28). A valve mechanism (3) is provided inside the partition plate (26), and the valve mechanism (3) is used to control the flow of aluminum liquid in the degassing chamber (28) to the buffer chamber (27).
2. The ultrasonic degassing device for aluminum alloy casting according to claim 1, characterized in that: The degassing chamber (28) is provided with an outflow pipe (20), and the end of the outflow pipe (20) away from the degassing chamber (28) is fixedly connected to the output end of the induction furnace (11) through a flange.
3. The ultrasonic degassing device for aluminum alloy casting according to claim 1, characterized in that: The buffer chamber (27) is provided with a connecting pipe (22), and the end of the connecting pipe (22) away from the buffer chamber (27) is fixedly connected to the input end of the continuous casting machine (12) through a flange.
4. The ultrasonic degassing device for aluminum alloy casting according to claim 1, characterized in that: The valve mechanism (3) includes a gate (30), and the inner surface of the gate (30) is slidably connected to the outer surface of the partition plate (26). A telescopic rod (31) is fixedly installed inside the gate (30), and a cylinder (32) is installed at the end of the telescopic rod (31) away from the gate (30).
5. The ultrasonic degassing device for aluminum alloy casting according to claim 4, characterized in that: A sealing chamber (33) is provided on the outside of the cylinder (32), and the top surface of the sealing chamber (33) is fixedly connected to the top surface of the flow channel (21).
6. The ultrasonic degassing device for aluminum alloy casting according to claim 5, characterized in that: A reinforcing plate (34) is fixedly installed on the outside of the cylinder (32), and the reinforcing plate (34) is fixedly connected to the inner surface of the sealing chamber (33).
7. The ultrasonic degassing device for aluminum alloy casting according to claim 1, characterized in that: The ultrasonic transducer (23) is provided with a support plate (24) on its outer side. A support rod (25) is fixedly provided on the bottom surface of the support plate (24), and the end of the support rod (25) away from the support plate (24) is fixedly connected to the top surface of the flow channel (21).