Aluminum alloy stirring and homogenizing device and process

Abstract

The invention discloses an aluminum alloy stirring and homogenizing device and process, and relates to the technical field of stirring devices.The aluminum alloy stirring and homogenizing device comprises a mixing barrel, a mixing cavity is formed in the mixing barrel, a liquid discharging pipe is arranged at the bottom of the mixing barrel, and a control valve is arranged on the liquid discharging pipe; the supporting frame is provided with a lifting part; a baffle is arranged on the peripheral side of the driving shaft, and the supporting column drives the driving shaft to slide into or out of the mixing cavity; when the driving shaft slides into the mixing cavity, the baffle is positioned at the opening of the mixing cavity; the driving assembly drives the driving shaft to rotate; the power shaft is provided with a plurality of power blades; when the driving shaft rotates, the power assembly drives the power shaft to reciprocate up and down; the power shaft is provided with a connecting plate, an air conveying groove is formed in the connecting plate, and an air outlet hole is formed in the connecting plate. The driving shaft is sleeved with a connecting ring, a connecting groove is formed in the inner circumferential side of the connecting ring, a communicating hole is formed in the driving shaft, and an air supply pipe is arranged on the connecting ring. According to the invention, the dispersion and uniform distribution effect of the silicon phase can be improved.

Description

Technical Field

[0001] This application relates to the technical field of stirring devices, and in particular to an aluminum alloy stirring and homogenization device and process. Background Technology

[0002] ADC12 aluminum alloy, a common cast aluminum alloy, has wide applications in industrial fields. With the development of industries such as automobiles and electronics, the performance and appearance requirements for structural components are constantly increasing. Due to its good fluidity and casting properties, ADC12 aluminum alloy occupies an important position in the manufacture of structural components such as automotive parts and electronic appliance housings, driving the development of related industries.

[0003] In the traditional production of ADC12 aluminum alloy parts, the alloy is directly cast after melting. During the cooling and solidification process, silicon in the melt is prone to segregation and agglomeration, forming coarse and unevenly distributed primary or eutectic silicon phases. Furthermore, the industry currently widely employs processes such as melt purification, degassing, and slag removal during the aluminum alloy melting stage to improve melt cleanliness. These methods are effective in removing inclusions and gases.

[0004] However, the coarse and unevenly distributed silicon phase formed during cooling and solidification can be inherited by the surface of the parts. After anodizing, the oxide film will show bright spots, dark spots, or microscopic unevenness and other defects, which will seriously affect the appearance quality and grade of the product. Moreover, existing processes such as melt purification, degassing, and slag removal have limited effect on improving the uniform distribution of the silicon phase in the aluminum melt. The problem of silicon phase homogenization cannot be fundamentally solved, which limits the application of ADC12 aluminum alloy in processes such as color anodizing that have high requirements for surface uniformity. Summary of the Invention

[0005] To improve the dispersion and uniform distribution of the silicon phase, this application provides an aluminum alloy stirring and homogenization device and process.

[0006] In a first aspect, this application provides an aluminum alloy stirring and homogenization device, which adopts the following technical solution: An aluminum alloy stirring and homogenization device includes a mixing cylinder, a mixing chamber formed inside the mixing cylinder, a drain pipe provided at the bottom of the mixing cylinder, and a control valve provided in the drain pipe; A support frame is provided adjacent to the mixing cylinder, the support frame is provided with a support column, and the support frame is provided with a lifting component that drives the support column to slide up and down; A drive shaft is rotatably connected to the support column. The drive shaft extends vertically and a baffle is provided on the outer periphery of the drive shaft. The support column drives the drive shaft to slide into or out of the mixing chamber. When the drive shaft slides into the mixing chamber, the baffle is located at the opening of the mixing chamber; A drive assembly is disposed on the support column, and the drive assembly drives the drive shaft to rotate. A power shaft slides up and down on the drive shaft and is coaxially arranged, and multiple power blades are arranged circumferentially on the outer periphery of the power shaft; A power assembly is disposed on the drive shaft. When the drive shaft rotates, the power assembly drives the drive shaft to reciprocate up and down. A connecting plate is provided at the bottom of the power shaft, an air supply groove is provided in the connecting plate, and an air outlet is provided at the top of the connecting plate that communicates with the air supply groove. The connecting plate and the power shaft are provided with a transmission groove that connects to the air supply groove. A connecting ring is rotatably sleeved on the outer circumference of the drive shaft. A connecting groove is provided on the inner circumference of the connecting ring. The drive shaft is provided with a connecting hole that connects the connecting groove and the transmission groove. An air supply pipe that connects to the connecting groove is provided on the connecting ring.

[0007] By adopting the above technical solution, the mixing cylinder can hold aluminum alloy liquid, and the drain pipe and control valve facilitate the discharge of the homogenized aluminum alloy liquid; the support frame and lifting component can drive the drive shaft to slide into or out of the mixing chamber; the drive assembly makes the drive shaft rotate, and the power assembly drives the power shaft to move up and down reciprocally, which works with the power blades to stir the aluminum alloy liquid; inert gas is introduced into the mixing chamber through the gas supply pipe, connecting ring, transmission tank, etc., to promote the uniform dispersion of silicon phase in the aluminum alloy liquid and solve the problem of anodic oxide film layer caused by uneven silicon phase distribution.

[0008] Optionally, the drive assembly includes a drive motor, a drive gear, and a transmission gear, wherein the drive motor is mounted on the support column, and the transmission gear is mounted on the output shaft of the drive motor; The drive gear is disposed on the outer periphery of the drive shaft, and the drive gear meshes with the transmission gear.

[0009] By adopting the above technical solution, the drive motor can stably drive the drive shaft to rotate through the meshing of the transmission gear and the drive gear, providing power for the stirring operation of the aluminum alloy stirring homogenization device, thereby promoting the uniform dispersion of silicon phase in aluminum alloy, improving the distribution state of silicon phase in aluminum melt, reducing the possibility of silicon phase segregation and agglomeration, reducing problems such as surface graininess, uneven gloss and color of oxide film after anodizing, and improving the appearance quality and grade of aluminum alloy parts.

[0010] Optionally, the power assembly includes a reciprocating lead screw, a power ring, and a fixing bar; The reciprocating screw is disposed on the drive shaft and coaxially arranged, the top of the reciprocating screw protrudes outside the drive shaft, and the fixing bar connects the reciprocating screw and the support column; The reciprocating screw slides up and down on the power shaft, the power ring is disposed on the power shaft and sleeved on the outer periphery of the reciprocating screw, and the power ring is threadedly connected to the reciprocating screw.

[0011] By adopting the above technical solution, when the drive shaft rotates, the reciprocating screw, power ring and fixed bar can be used to make the power shaft move up and down along the axis within the drive shaft, thereby more fully stirring the aluminum alloy liquid, promoting the uniform dispersion of silicon phase in the aluminum alloy liquid, and solving the surface problem of oxide film layer caused by uneven distribution of silicon phase.

[0012] Optionally, the drive shaft is rotatably connected to a rotating shaft, and the power blades are disposed at the end of the rotating shaft away from the drive shaft and correspond one-to-one. The power shaft is equipped with a control component. When the power shaft slides up and down, the control component controls the rotation of the rotating shaft.

[0013] By adopting the above technical solution, the control component controls the rotation of the rotating shaft when the power shaft slides up and down, so that the power blade rotates, increasing the stirring direction and range of the aluminum alloy liquid, promoting the uniform dispersion of the silicon phase in the aluminum alloy liquid, and solving the problems of uneven silicon phase distribution leading to surface graininess, inconsistent gloss and uneven color of the anodic oxide film.

[0014] Optionally, the control component includes a control gear and a control rack; The control gear is disposed on the outer periphery of the rotating shaft and rotatably connected to the power shaft. The control rack is slidably connected to the power shaft, and the top of the control rack is connected to the drive shaft. The control rack meshes with the control gear.

[0015] By adopting the above technical solution, the meshing of the control gear and the control rack enables the rotation of the rotating shaft when the power shaft slides up and down, thereby driving the power blade to rotate. This enhances the stirring effect of the aluminum alloy liquid, promotes more uniform dispersion of the silicon phase in the aluminum melt, reduces silicon phase segregation and agglomeration, reduces the possibility of bright spots, dark spots or micro-uneven defects in the oxide film after anodizing, and improves the appearance quality and grade of the product.

[0016] Optionally, multiple power blades are evenly spaced vertically, and each group of power blades has multiple blades evenly spaced circumferentially. When one set of the power blades rotates to a horizontal state, the adjacent power blades above and below rotate to a vertical state. The connecting plate is provided with an air outlet area, which is located directly below the power blade, and the air outlet is located in the air outlet area.

[0017] By adopting the above technical solution, the power blades, which are evenly spaced vertically and circumferentially, combined with a set of horizontal and adjacent sets of vertical blades, can perform multi-directional and multi-level stirring of the aluminum alloy liquid, making the stirring more thorough. The air outlet is located in the air outlet area directly below the power blade, which allows the gas to act more precisely on the stirring area of ​​the power blade, enhances the disturbance effect of the gas on the aluminum alloy liquid, further promotes the uniform dispersion of the silicon phase, and improves the homogenization of the aluminum alloy liquid.

[0018] Optionally, the bottom of the connecting plate is provided with a plurality of actuating blades evenly spaced along the circumference.

[0019] By adopting the above technical solution, during the process of homogenizing the aluminum alloy liquid, the agitator at the bottom of the connecting plate can further agitate the aluminum alloy liquid, making the silicon phase distribution in the aluminum alloy liquid more uniform, reducing surface defects of the oxide film after anodizing caused by uneven silicon phase distribution, and improving the appearance quality of the product.

[0020] Secondly, this application provides a process for homogenizing aluminum alloy through stirring, which adopts the following technical solution: A process for homogenizing aluminum alloy by stirring includes the following steps: S1: Liquid injection, injecting the molten aluminum, after being smelted and preliminarily degassed and slag-removed, into the mixing chamber; S2: Activate the lifting component to cause the support column to drive the drive shaft to slide into the mixing chamber until the baffle is at the opening of the mixing chamber; S3: Start the drive assembly to drive the drive shaft to rotate. At the same time, the power assembly drives the power shaft to reciprocate up and down along the axial direction within the drive shaft under the rotation of the drive shaft. During this process, inert gas is introduced into the connecting ring through the gas supply pipe. The gas passes through the connecting groove, the connecting hole, the transmission groove and the gas delivery groove in sequence, and is finally discharged from the gas outlet to the power blade into the melt in the mixing chamber. S4: After processing is completed, shut off the drive assembly, power assembly and gas supply, lift the drive shaft and power shaft out of the mixing chamber through the lifting component, and then open the control valve to transfer the homogenized aluminum alloy melt to the next sedimentation tank through the drain pipe.

[0021] By adopting the above technical solution, the aluminum alloy liquid to be homogenized can be injected into the mixing chamber. After the drive shaft slides into the mixing chamber, the drive shaft rotates while the power shaft moves up and down. It can also discharge inert gas into the melt in the mixing chamber, thereby achieving the homogenization of the aluminum alloy liquid. After the treatment is completed, the homogenized aluminum alloy melt can be transferred to the next sedimentation tank.

[0022] In summary, this application includes at least one of the following beneficial effects: 1. The rotation of the drive shaft and the reciprocating motion of the power shaft can stir the aluminum alloy liquid, promote the uniform dispersion of the silicon phase, and solve the problem of uneven silicon phase distribution; 2. Introducing inert gas into the mixing chamber can further promote the uniform distribution of the silicon phase in the molten aluminum alloy. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the external structure of an embodiment of this application; Figure 2 This is a schematic diagram of the internal structure of an embodiment of this application; Figure 3 yes Figure 2 Enlarged schematic diagram of part A; Figure 4 This is a schematic diagram of the inert gas transport state in an embodiment of this application; Figure 5 This is a schematic diagram of the internal structure of the power shaft in an embodiment of this application; Figure 6 This is a schematic diagram of the external structure of the connecting plate in an embodiment of this application.

[0024] Reference numerals: 1. Mixing cylinder; 11. Mixing chamber; 12. Drain pipe; 13. Control valve; 2. Support frame; 21. Support column; 22. Lifting component; 3. Drive shaft; 31. Baffle; 32. Connecting ring; 321. Connecting groove; 322. Air supply pipe; 33. Connecting hole; 34. Rotating shaft; 4. Drive assembly; 41. Drive motor; 42. Drive gear; 43. Transmission gear; 5. Power shaft; 51. Power blade; 52. Connecting plate; 521. Air delivery groove; 522. Air outlet; 523. Air outlet area; 524. Actuating blade; 6. Fixing bar; 61. Reciprocating screw; 62. Power ring; 7. Transmission groove; 8. Control assembly; 81. Control gear; 82. Control rack. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0026] This application discloses an aluminum alloy stirring and homogenization device.

[0027] This application mainly uses an aluminum alloy stirring device to stir and ventilate the aluminum alloy liquid, which achieves the effect of promoting the uniform dispersion of silicon phase in the aluminum alloy liquid and improving the uniformity of the melt. The following is a further detailed description of this application. Example

[0028] See Figure 1 and Figure 2The aluminum alloy stirring and homogenization device provided in this application includes a mixing cylinder 1, a support frame 2, a drive shaft 3, a drive assembly 4, a power shaft 5, and a power component. The support frame 2 is located adjacent to the mixing cylinder 1 and can be driven by a lifting component 22 to slide the support column 21 up and down, thereby causing the drive shaft 3 to slide into or out of the mixing chamber 11 within the mixing cylinder 1. The drive assembly 4 can drive the drive shaft 3 to rotate, and the power component can drive the power shaft 5 to reciprocate up and down while the drive shaft 3 rotates. This effectively promotes the uniform dispersion of the silicon phase in the molten aluminum alloy before solidification, because the rotation of the drive shaft 3 and the reciprocating motion of the power shaft 5 can fully stir the molten aluminum alloy, making the silicon phase more uniformly dispersed in the aluminum melt.

[0029] Specifically, a mixing chamber 11 is formed inside the mixing cylinder 1, and a drain pipe 12 is fixedly connected to the bottom of the mixing cylinder 1. A control valve 13 is installed on the drain pipe 12. The mixing cylinder 1 is generally made of a high-temperature resistant metal material, such as stainless steel, and the shape of the mixing cylinder 1 is usually cylindrical. The drain pipe 12 is used to discharge the uniformly mixed aluminum alloy liquid, and the control valve 13 can control the opening and closing of the drain and the flow rate. The drain pipe 12 can be a common straight pipe, and the control valve 13 can be a common valve type such as a ball valve or a gate valve.

[0030] The support frame 2 has a support column 21 that slides up and down. A lifting component 22 is also installed on the support frame 2, which drives the support column 21 to slide up and down. The support frame 2 serves to support and fix the structure and is generally constructed of a metal frame. The support column 21 is typically a long, columnar metal rod, and the lifting component 22 can be a hydraulic cylinder, an electric actuator, etc. For example, a hydraulic cylinder consists of a cylinder body, piston, and piston rod. The movement of the piston and piston rod is achieved by the flow of hydraulic oil, thus enabling the support column 21 to slide up and down.

[0031] The drive shaft 3 is rotatably connected to the support column 21. The drive shaft 3 extends vertically, and a baffle 31 is fixedly connected to its outer periphery. The drive shaft 3 is generally made of stainless steel, titanium alloy, or graphite with a smooth surface to reduce friction during rotation. The baffle 31 is a circular metal plate. When the drive shaft 3 slides into the mixing chamber 11, the baffle 31 is located at the opening of the mixing chamber 11, preventing the aluminum alloy liquid from splashing out. Furthermore, there is a gap between the outer periphery of the baffle 31 and the periphery of the mixing chamber 11.

[0032] The drive assembly 4 includes a drive motor 41, a drive gear 42, and a transmission gear 43. The drive motor 41 is fixed to the top of the support column 21, and the transmission gear 43 is fixedly connected to the output shaft of the drive motor 41. The drive gear 42 is fixedly connected to the outer periphery of the drive shaft 3, and the drive gear 42 meshes with the transmission gear 43. The drive motor 41 provides power for the rotation of the drive shaft 3, and the drive motor 41 can be an AC motor or a DC motor. The drive gear 42 and the transmission gear 43 are generally metal gears, and their tooth profiles can be common tooth profiles such as involute tooth profiles. When the drive motor 41 starts, the output shaft drives the transmission gear 43 to rotate, and the transmission gear 43, through meshing, drives the drive gear 42 to rotate, thereby causing the drive shaft 3 to rotate.

[0033] The power shaft 5 is a square column and slides vertically along the drive shaft 3, coaxially arranged. Multiple power blades 51 are circumferentially arranged on the outer periphery of the power shaft 5. The power shaft 5 is made of stainless steel, titanium alloy, or graphite with a surface coating. The surface of the power shaft 5 fits well with the inner surface of the drive shaft 3 to achieve smooth vertical sliding. The power blades 51 are generally made of stainless steel, titanium alloy, or graphite with a surface coating, and their shape can be spiral, fan-shaped, etc. The function of the power blades 51 is to stir the molten aluminum alloy during the vertical movement of the power shaft 5 and the rotation of the drive shaft 3, enhancing the stirring effect.

[0034] See Figure 2 and Figure 3 The power assembly includes a reciprocating screw 61, a power ring 62, and a fixing bar 6. The reciprocating screw 61 passes through the drive shaft 3 and is coaxially arranged, with relative rotation between the reciprocating screw 61 and the drive shaft 3. The top of the reciprocating screw 61 protrudes beyond the drive shaft 3. The two ends of the fixing bar 6 are respectively connected and fixed to the reciprocating screw 61 and the support column 21, so that the reciprocating screw 61 is in a fixed state. The reciprocating screw 61 slides up and down on the drive shaft 5. The power ring 62 is fixedly connected to the drive shaft 5 and sleeved on the outer circumference of the reciprocating screw 61. The power ring 62 and the reciprocating screw 61 are threadedly connected. The thread of the reciprocating screw 61 has two directions. When the drive shaft 3 rotates, because the fixing bar 6 fixes the reciprocating screw 61, the power ring 62 moves up and down on the reciprocating screw 61, thereby driving the drive shaft 5 to move up and down.

[0035] See Figure 3 and Figure 4A connecting plate 52 is fixedly connected to the bottom of the drive shaft 5. An air supply groove 521 is formed inside the connecting plate 52, and an air outlet 522 communicating with the air supply groove 521 is formed at the top of the connecting plate 52. The connecting plate 52 is generally a circular plate structure, made of stainless steel, titanium alloy, or graphite with a surface coating. The air supply groove 521 is used to transport gas, and the air outlet 522 discharges the gas into the molten aluminum alloy. A transmission groove 7 communicating with the air supply groove 521 is formed on both the connecting plate 52 and the drive shaft 5. A connecting ring 32 is rotatably fitted on the outer circumference of the drive shaft 3. A connecting groove 321 is formed on the inner circumference of the connecting ring 32. The drive shaft 3 has a communicating hole 33 communicating with both the connecting groove 321 and the transmission groove 7. An air supply pipe 322 communicating with the connecting groove 321 is provided on the connecting ring 32. The gas supply pipe 322 is used to input inert gas, such as argon. The gas passes through the connecting groove 321, the connecting hole 33, the transmission groove 7, and the gas delivery groove 521, and is finally discharged into the aluminum alloy liquid from the gas outlet 522. The introduction of gas can further promote the stirring of the aluminum alloy liquid and the uniform dispersion of the silicon phase. At the same time, the gas can be used to assist stirring, realize the mixing of gas and liquid phases, and enhance the degassing and slag removal effect. Moreover, the baffle 31 is located at the cavity opening of the mixing chamber 11. When the inert gas leaves the aluminum alloy liquid, the inert gas is blocked by the baffle 31 and then flows out from the gap between the baffle 31 and the cavity wall of the mixing chamber 11. This allows the inert gas to cover the space between the top of the aluminum alloy liquid surface and the baffle 31, reducing the possibility of air reacting with the aluminum alloy liquid.

[0036] Multiple sets of power blades 51 are evenly spaced vertically, with each set containing multiple power blades 51 evenly spaced circumferentially. When one set of power blades 51 rotates to a horizontal position, the adjacent power blades 51 above and below rotate to a vertical position. That is, the rotation states of two adjacent sets of power blades 51 differ by 90 degrees. This arrangement allows for more thorough and uniform mixing.

[0037] See Figure 5 and Figure 6 The connecting plate 52 is provided with an air outlet area 523, which is located directly below each power blade 51 in the same vertical position. The air outlet 522 is located in the air outlet area 523, which allows the gas to better contact the aluminum alloy liquid phase stirred by the power blade 51.

[0038] A drive shaft 3 is rotatably connected to a rotating shaft 34. There are multiple rotating shafts 34, each corresponding to a power blade 51. The power blade 51 is fixedly connected to the end of the rotating shaft 34 away from the drive shaft 3. The power shaft 5 is equipped with a control component 8. When the power shaft 5 slides up and down, the control component 8 controls the rotating shaft 34 to rotate.

[0039] The control assembly 8 includes a control gear 81 and a control rack 82. The control gear 81 is fixedly connected to the outer periphery of the rotating shaft 34 and rotatably connected to the power shaft 5. The control rack 82 is slidably connected to the power shaft 5, and its top is fixedly connected to the drive shaft 3. The control rack 82 and the control gear 81 mesh with each other. When the power shaft 5 slides up and down, the control rack 82 drives the rotating shaft 34 to rotate through the control gear 81, causing the power blade 51 to enter a rotating state, thereby improving the uniform mixing effect of the aluminum alloy liquid.

[0040] Multiple agitator blades 524 are evenly spaced along the circumference at the bottom of the connecting plate 52. The agitator blades 524 can further stir the molten aluminum alloy and improve the stirring effect. The agitator blades 524 are generally made of stainless steel, titanium alloy or surface-coated graphite, and the shape of the agitator blades 524 can be triangular, rectangular, etc.

[0041] The implementation principle of the aluminum alloy stirring and homogenization device in Embodiment 1 of this application is as follows: This aluminum alloy stirring and homogenization device uses the rotation of the drive shaft 3 and the reciprocating motion of the power shaft 5 to thoroughly stir the molten aluminum alloy using the power blade 51 and the agitator blade 524. Simultaneously, inert gas is introduced through the gas supply pipe 322, causing the gas to form bubbles in the molten aluminum alloy, further promoting the uniform dispersion of the silicon phase. This stirring and aeration method effectively improves the distribution of the silicon phase in the molten aluminum, avoiding silicon phase segregation and agglomeration. This results in a more uniform dispersion of the silicon phase before alloy solidification, solving the fundamental problem of silicon phase homogenization in traditional processes. It improves the uniformity of the molten aluminum alloy, thereby enhancing the appearance quality and grade of the anodized product, representing a significant improvement and contribution compared to existing technologies. Example

[0042] On the other hand, this application discloses an aluminum alloy stirring and homogenization process, including the following steps: Step 1: Liquid Injection. Inject the homogenized molten aluminum alloy into the mixing chamber 11. During the injection process, use high-temperature resistant casting equipment, such as a ladle, to slowly and evenly inject the molten aluminum alloy into the mixing chamber 11. Care should be taken to control the injection speed to reduce the possibility of splashing.

[0043] Step 2: Activate the lifting component 22, causing the support column 21 to drive the drive shaft 3 into the mixing chamber 11 until the baffle 31 is at the opening of the mixing chamber 11. The lifting component 22 can be a hydraulic cylinder. By controlling the pressure and flow of the hydraulic system, the support column 21 is lowered smoothly, accurately sliding the drive shaft 3 into the mixing chamber 11.

[0044] Step 3: Start the drive assembly 4, drive shaft 3 rotates, and simultaneously, the power assembly, driven by the rotation of drive shaft 3, drives power shaft 5 to reciprocate axially within drive shaft 3. During this process, inert gas is introduced into connecting ring 32 through gas supply pipe 322. The gas passes sequentially through connecting groove 321, connecting hole 33, transmission groove 7, and gas delivery groove 521, and finally exits from gas outlet 522 to power blade 51 into the melt in mixing chamber 11. After the drive motor 41 of drive assembly 4 starts, it drives drive gear 42 and transmission gear 43 to rotate, causing drive shaft 3 to rotate. The power assembly realizes the reciprocating motion of power shaft 5 according to its specific structure. Gas supply pipe 322 is connected to a gas source, which can be an argon cylinder or nitrogen cylinder, etc. The amount of gas introduced is controlled by adjusting the gas supply pressure and flow rate.

[0045] Step 4: After processing, shut off drive assembly 4, power assembly, and gas supply. Use lifting device 22 to lift drive shaft 3 and power shaft 5 out of mixing chamber 11. Then open control valve 13 to transfer the homogenized aluminum alloy melt to the next sedimentation tank via drain pipe 12. When shutting off drive assembly 4 and power assembly, first stop drive motor 41 to stop drive shaft 3 and power shaft 5 from moving. When shutting off gas supply, close the gas source valve. Lifting device 22 lifts drive shaft 3 and power shaft 5 out of mixing chamber 11, then opens control valve 13, allowing the aluminum alloy liquid to flow into the sedimentation tank via drain pipe 12.

[0046] The implementation principle of the aluminum alloy stirring and homogenization device in Embodiment 2 of this application is as follows: The aluminum alloy stirring and homogenization process achieves uniform dispersion of the silicon phase in the molten aluminum alloy through stirring and aeration. During stirring, the power blade 51 and the agitator blade 524 thoroughly agitate the molten aluminum alloy, and the introduction of gas further promotes the dispersion of the silicon phase. This process can solve the problem of silicon phase homogenization before the alloy solidifies, improving the quality and appearance of aluminum alloy products. Compared with traditional processes, it represents a significant improvement and opens up possibilities for the application of ADC12 aluminum alloy in processes such as color anodizing.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An aluminum alloy stirring and homogenization device, characterized in that: Includes a mixing cylinder (1), a mixing chamber (11) is formed inside the mixing cylinder (1), a drain pipe (12) is provided at the bottom of the mixing cylinder (1), and a control valve (13) is provided on the drain pipe (12). A support frame (2) is provided adjacent to the mixing cylinder (1). The support frame (2) is provided with a support column (21) and a lifting component (22) for driving the support column (21) to slide up and down. The drive shaft (3) is rotatably connected to the support column (21). The drive shaft (3) extends in the vertical direction. A baffle (31) is provided on the outer periphery of the drive shaft (3). The support column (21) drives the drive shaft (3) to slide into or out of the mixing chamber (11). When the drive shaft (3) slides into the mixing chamber (11), the baffle (31) is located at the opening of the mixing chamber (11); A drive assembly (4) is disposed on the support column (21), and the drive assembly (4) drives the drive shaft (3) to rotate; The power shaft (5) slides up and down on the drive shaft (3) and is coaxially arranged. Multiple power blades (51) are arranged circumferentially on the outer periphery of the power shaft (5). A power assembly is provided on the drive shaft (3). When the drive shaft (3) rotates, the power assembly drives the drive shaft (5) to move up and down reciprocally. The bottom of the power shaft (5) is provided with a connecting plate (52), and an air supply groove (521) is provided in the connecting plate (52). An air outlet (522) communicating with the air supply groove (521) is provided on the top of the connecting plate (52). The connecting plate (52) and the power shaft (5) are provided with a transmission groove (7) that connects to the air supply groove (521). The outer circumference of the drive shaft (3) is rotatably fitted with a connecting ring (32). The inner circumference of the connecting ring (32) is provided with a connecting groove (321). The drive shaft (3) is provided with a connecting hole (33) that connects the connecting groove (321) and the transmission groove (7). The connecting ring (32) is provided with an air supply pipe (322) that connects to the connecting groove (321).

2. The aluminum alloy stirring and homogenizing device according to claim 1, characterized in that: The drive assembly (4) includes a drive motor (41), a drive gear (42), and a transmission gear (43). The drive motor (41) is mounted on the support column (21), and the transmission gear (43) is mounted on the output shaft of the drive motor (41). The drive gear (42) is disposed on the outer periphery of the drive shaft (3), and the drive gear (42) meshes with the transmission gear (43).

3. The aluminum alloy stirring and homogenizing device according to claim 2, characterized in that: The power assembly includes a reciprocating lead screw (61), a power ring (62), and a fixing bar (6); The reciprocating screw (61) is disposed on the drive shaft (3) and coaxially disposed. The top of the reciprocating screw (61) protrudes out of the drive shaft (3). The fixing bar (6) connects the reciprocating screw (61) and the support column (21). The reciprocating screw (61) slides up and down on the power shaft (5), the power ring (62) is disposed on the power shaft (5) and sleeved on the outer periphery of the reciprocating screw (61), and the power ring (62) is threadedly connected to the reciprocating screw (61).

4. The aluminum alloy stirring and homogenizing device according to claim 3, characterized in that: The drive shaft (3) is rotatably connected to a rotating shaft (34), and the power blade (51) is disposed at the end of the rotating shaft (34) away from the drive shaft (3) and corresponds to it one by one; The power shaft (5) is equipped with a control component (8). When the power shaft (5) slides up and down, the control component (8) controls the rotation shaft (34) to rotate.

5. The aluminum alloy stirring and homogenizing device according to claim 4, characterized in that: The control component (8) includes a control gear (81) and a control rack (82); The control gear (81) is disposed on the outer periphery of the rotating shaft (34) and rotatably connected to the power shaft (5). The control rack (82) is slidably connected to the power shaft (5) and the top of the control rack (82) is connected to the drive shaft (3). The control rack (82) meshes with the control gear (81).

6. The aluminum alloy stirring and homogenizing device according to claim 5, characterized in that: The power blades (51) are evenly spaced in the upper and lower parts, and each group of power blades (51) has multiple blades and they are evenly spaced in the circumferential direction. When one of the sets of power blades (51) rotates to a horizontal state, the adjacent power blades (51) above and below rotate to a vertical state; The connecting plate (52) is provided with an air outlet area (523), which is located directly below the power blade (51), and the air outlet (522) is located in the air outlet area (523).

7. The aluminum alloy stirring and homogenizing device according to claim 1, characterized in that: The bottom of the connecting plate (52) is provided with a plurality of actuating blades (524) evenly spaced along the circumference.

8. An aluminum alloy stirring and homogenization process, employing an aluminum alloy stirring and homogenization device as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Liquid injection, the molten aluminum liquid after smelting and preliminary degassing and slag removal is injected into the mixing chamber (11); S2: Activate the lifting component (22) so that the support column (21) drives the drive shaft (3) to slide into the mixing chamber (11) until the baffle (31) is at the opening of the mixing chamber (11); S3: Start the drive assembly (4) to drive the drive shaft (3) to rotate. At the same time, the power assembly drives the power shaft (5) to move up and down along the axial direction within the drive shaft (3) under the rotation of the drive shaft (3). During this process, inert gas is introduced into the connecting ring (32) through the gas supply pipe (322). The gas passes through the connecting groove (321), the connecting hole (33), the transmission groove (7) and the gas delivery groove (521) in sequence, and is finally discharged from the gas outlet (522) to the power blade (51) into the melt in the mixing chamber (11). S4: After the processing is completed, shut off the drive assembly (4), power assembly and gas supply, lift the drive shaft (3) and power shaft (5) out of the mixing chamber (11) through the lifting component (22), and then open the control valve (13) to transfer the homogenized aluminum alloy melt to the next sedimentation tank through the drain pipe (12).

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