Molten aluminum degassing and heat preservation device for aluminum alloy hub manufacturing

Abstract

The utility model discloses an aluminum water degassing and heat preservation device for manufacturing an aluminum alloy hub, which comprises a heat preservation furnace body, and an aluminum water heating and heat preservation pool, an impurity removal pool and a liquid taking pool are arranged on the heat preservation furnace body. The molten aluminum heating and heat preservation pool is provided with a heat preservation cover and a heating rod, the heat preservation cover reduces heat loss, and the heating rod ensures molten aluminum heating and heat preservation; and the liquid aluminum water flows into the impurity removal tank through the bottom flowing hole. A special flow guide boss is arranged on the inner wall of the impurity removal pool and can guide molten aluminum to form rotating water flow, and impurities are promoted to gather towards the edge. The position and depth of the stirring device on one side can be flexibly adjusted, a stirring head of the stirring device is provided with a breaking blade, bubbles in molten aluminum can be broken to achieve degassing during high-speed rotation, impurities can be scattered, and harmful gas hydrogen is removed through inert gas nitrogen. And the aluminum water subjected to impurity removal and gas removal stably flows into the liquid taking pool for later use through a specific flow hole. Through cooperative operation of all the components, high-quality molten aluminum is provided for manufacturing of the aluminum alloy hub, and the device has the advantages of being efficient, safe and the like.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy wheel manufacturing technology, specifically to an aluminum molten metal degassing and heat preservation device for aluminum alloy wheel manufacturing. Background Technology

[0002] In the manufacturing process of aluminum alloy wheels, the quality of the molten aluminum plays a crucial role in the wheel's overall quality. During the smelting process, gases and impurities easily become mixed into the molten aluminum. If not removed promptly, this can lead to defects such as porosity and inclusions in the aluminum alloy castings, affecting the wheel's strength, airtightness, and other properties. Traditional molten aluminum treatment equipment is often limited in function, with poor degassing and impurity removal effects, and struggles to maintain stable temperatures during smelting and subsequent processing, failing to meet the demands for efficient and high-quality production of aluminum alloy wheels. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] The technical problem to be solved by this utility model is that traditional aluminum water treatment devices often have limited functions and poor degassing and impurity removal effects.

[0005] (II) Technical Solution

[0006] To solve the above problems, this utility model provides the following technical solution:

[0007] A degassing and heat preservation device for molten aluminum used in aluminum alloy wheel manufacturing includes a heat preservation furnace body, a locking device, and a stirring device.

[0008] The heat preservation furnace body is provided with an aluminum molten heating and heat preservation tank, an impurity removal tank and a liquid collection tank, and a heat preservation cover is provided on the side of the heat preservation furnace body near the aluminum molten heating and heat preservation tank. The heat preservation cover is connected to the heat preservation furnace body by a hinge shaft. The locking device is connected to the heat preservation cover to control the opening and closing of the heat preservation cover. The stirring device is provided on one side of the heat preservation furnace body for stirring and removing impurities from the aluminum molten metal in the impurity removal tank.

[0009] When the insulation cover is closed, it covers the aluminum molten heating and insulation tank, and the insulation cover is provided with a set of heating rods to heat the mixed aluminum liquid in the aluminum molten heating and insulation tank. The aluminum molten heating and insulation tank and the impurity removal tank are connected through a flow hole one, and the impurity removal tank and the liquid taking tank are connected through a flow hole two. Both the flow hole one and the flow hole two are located near the bottom of the inner side of the insulation furnace body.

[0010] The inner wall of the impurity removal tank is provided with two sets of flow guiding protrusions. The flow guiding protrusions are provided with two symmetrically arranged arc-shaped flow guiding surfaces and one arc-shaped connecting surface. One end of the two arc-shaped flow guiding surfaces is designed to be tangent to the inner wall of the impurity removal tank, and the other end is respectively tangent to the two sides of the arc-shaped connecting surface. The arc-shaped connecting surface extends towards the axial position of the impurity removal tank.

[0011] Furthermore, the heat-insulating cover is also provided with an aluminum inlet for convenient receiving of molten aluminum, and a splash guard is installed at the aluminum inlet position.

[0012] Furthermore, the engaging device includes a column, a winch motor, a steel cable, a steel cable winch, a winch connecting shaft, a steel cable fixing disc, a fixing disc connecting shaft, a winch frame, rollers, roller shafts, and roller frames. The steel cable winch is fixedly connected to the winch connecting shaft. Both ends of the winch connecting shaft are connected to the two sides of the winch frame via bearings. The steel cable fixing disc is inherently connected to the fixing disc connecting shaft. Both ends of the fixing disc connecting shaft are inherently connected to the two sides of the winch frame. The roller frame is disposed on the upper surface of the insulation cover, and both ends of the roller shaft are connected to the roller frame via bearings. The roller is fixedly disposed in the middle of the roller shaft. One end of the steel cable is wound around the steel cable winch, and the other end is fixedly disposed on the steel cable fixing disc. The middle part is sleeved on the roller. One end of the winch connecting shaft also extends to the outside of the winch frame and is connected to the shaft of the winch motor via a chain and sprocket connection.

[0013] Furthermore, the cable winch is located on the upper part of the cable fixing plate, and the winch motor is fixedly connected to the column, and the winch frame is also fixedly connected to the column.

[0014] Furthermore, the stirring device includes a connecting base connected to the foundation, a rotary cylinder, a rotary plate, a second column, a set of linear guide rail pairs, a lifting motor, a lower sprocket, a connecting plate, a set of stirring components, and a chain. The base of the rotary cylinder is inherently connected to the connecting base, and its output shaft is inherently connected to the lower end face of the rotary plate. The second column is located on the upper end face of the rotary plate, and the two linear guide rail pairs are symmetrically arranged on both sides of the second column. The lifting motor is fixedly mounted on the second column, and its output shaft passes through the second column and is connected to the lower sprocket via the chain. The connecting plate has a rectangular opening for easy connection with the chain. The chain has a closed-loop structure and is fitted into the rectangular opening. One side of the chain is connected to the connecting plate to control the lifting and lowering of the connecting plate. Both sides of the connecting plate are respectively connected to sliders on a set of linear guide rail pairs. Two stirring components are provided, both of which are located on the connecting plate. The lower sprocket is connected to the second column via a rotating shaft.

[0015] Furthermore, the stirring assembly includes a stirring motor, a stirring shaft, and stirring heads mounted on the connecting plate. The stirring shaft is connected to the connecting plate via a bearing, and its upper end is connected to the rotating shaft of the stirring motor via a synchronous belt and a synchronous pulley. Each stirring shaft is provided with three stirring heads, which are respectively located at the lower, middle, and upper parts of the stirring shaft.

[0016] Furthermore, the stirring head includes two symmetrically arranged discs, one above the other, with a connecting block between the two discs. The connecting block has three arc-shaped surfaces, with each pair of adjacent arc-shaped surfaces being tangent to each other, and forming a breaking blade between two adjacent arc-shaped surfaces.

[0017] Furthermore, the stirring motor on the side closer to the liquid collection tank rotates clockwise, while the stirring motor on the side farther from the liquid collection tank rotates counterclockwise.

[0018] Furthermore, the first flow hole has a circular opening structure, the second flow hole has a square opening structure, and the cross-sectional area of ​​the second flow hole is smaller than that of the first flow hole.

[0019] (III) Beneficial Effects

[0020] The beneficial effects of this utility model are:

[0021] This invention guides molten aluminum tangentially along the inner wall of the impurity removal tank using guide protrusions and arc-shaped flow surfaces, creating a rotating water flow. Impurities aggregate towards the edge under centrifugal force, and the arc-shaped connecting surface further enhances the water flow disturbance, improving impurity separation efficiency. Furthermore, a stirring motor drives the stirring shaft to rotate at high speed, and the stirring head with a breaking blade powerfully stirs the molten aluminum, breaking up bubbles and releasing gas, and dispersing impurity agglomerates. This dual impurity removal and degassing method works in parallel, deeply purifying the molten aluminum and significantly reducing the risk of defects such as porosity and inclusions in aluminum alloy wheels. Attached image description:

[0022] Figure 1 This is a perspective view of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the heat preservation furnace body of this utility model;

[0024] Figure 3 This is a schematic diagram of the locking device of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the stirring device of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the stirring assembly of this utility model;

[0027] Figure 6 This is a perspective view of the stirring head of this utility model;

[0028] Figure 7 This is a schematic diagram of the connection structure of this utility model.

[0029] Markings in the diagram: 1-Insulation furnace body, 2-Aluminum molten metal heating and insulation tank, 3-Impurity removal tank, 4-Liquid extraction tank, 5-Insulation cover, 6-Clamping device, 601-Column 1, 602-Windmill motor, 603-Steel cable, 604-Steel cable winch, 605-Windmill connecting shaft, 606-Steel cable fixing plate, 607-Fixing plate connecting shaft, 608-Windmill frame, 609-Roller, 610-Roller shaft, 611-Roller frame, 7-Stirring device, 701-Connecting base, 702-Rotating cylinder, 703-Rotating plate, 704-Column 2, 705 - Linear guide rail pair, 706- Lifting motor, 707- Lower sprocket, 708- Connecting plate, 709- Stirring assembly, 709a- Stirring motor, 709b- Stirring shaft, 709c- Stirring head, 709ca- Disc, 709cb- Connecting block, 709cc- Arc-shaped surface, 709cd- Breaking blade, 710- Rectangular opening, 711- Chain, 9- Heating rod, 10- Flow hole one, 11- Flow hole two, 12- Guide boss, 13- Arc-shaped flow guide surface, 14- Arc-shaped connecting surface, 15- Aluminum inlet, 16- Splash guard. 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] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Please see Figures 1-7The device shown is an aluminum molten metal degassing and heat preservation device for manufacturing aluminum alloy wheel hubs. It includes a heat preservation furnace body 1, a locking device 6 and a stirring device 7. The heat preservation furnace body 1 is equipped with an aluminum molten metal heating and heat preservation pool 2, a purification pool 3 and a liquid collection pool 4. The heat preservation furnace body 1 serves as the main frame of the entire device, supporting the aluminum molten metal heating and heat preservation pool 2, the purification pool 3 and the liquid collection pool 4, providing a stable place for heating, heat preservation, purification and subsequent use of aluminum molten metal.

[0033] Furthermore, an insulation cover 5 is provided on the side of the insulation furnace body 1 near the aluminum molten heating and insulation pool 2. The insulation cover 5 is connected to the insulation furnace body 1 via a hinge shaft, and a locking device 6 is connected to the insulation cover 5 to control its opening and closing. When the insulation cover 5 is closed, it can effectively reduce heat loss and create a good thermal environment for aluminum molten heating and insulation. When the insulation cover 5 is closed, it covers the aluminum molten heating and insulation pool 2, and a set of heating rods 9 are provided on the insulation cover 5 to heat the mixed aluminum liquid in the aluminum molten heating and insulation pool 2. The function of the heating rods 9 on the insulation cover 5 is to continuously replenish the heat of the mixed aluminum liquid in the aluminum molten heating and insulation pool 2, ensuring that the aluminum ingots are fully and stably melted, thereby ensuring the quality and efficiency of aluminum molten smelting.

[0034] The aluminum molten metal heating and insulation tank 2 and the impurity removal tank 3 are connected by a flow hole 10, and the impurity removal tank 3 and the liquid collection tank 4 are connected by a flow hole 21. Both flow holes 10 and 21 are located near the bottom of the inner side of the insulation furnace body 1. Flow hole 10 has a circular opening structure, while flow hole 21 has a square opening structure, and the cross-sectional area of ​​flow hole 21 is smaller than that of flow hole 10. The smaller cross-sectional area of ​​flow hole 21 allows for control of the flow rate of molten aluminum from the impurity removal tank 3 to the liquid collection tank 4, preventing impurities from re-mixing into the molten aluminum due to excessive flow rate. Furthermore, the smaller cross-sectional area makes the liquid collection tank 4 relatively independent, reducing interference from external factors on the purified molten aluminum and ensuring that the purity of the molten aluminum in the liquid collection tank 4 meets the requirements of subsequent aluminum alloy wheel manufacturing processes.

[0035] The stirring device 7 is installed on one side of the heat preservation furnace body 1 to stir and remove impurities from the molten aluminum in the impurity removal tank 3.

[0036] The inner wall of the impurity removal tank 3 is provided with two sets of guide protrusions 12. The guide protrusions 12 are provided with two symmetrically arranged arc-shaped flow-guiding surfaces 13 and an arc-shaped connecting surface 14. One end of the two arc-shaped flow-guiding surfaces 13 is designed to be tangent to the inner wall of the impurity removal tank 3, and the other end is respectively tangent to the two sides of the arc-shaped connecting surface 14. The arc-shaped connecting surface 14 extends to the axial position of the impurity removal tank 3.

[0037] One end of the two arc-shaped flow-guiding surfaces 13 on the flow-guiding boss 12 is tangent to the inner wall of the impurity removal tank 3, which can guide the aluminum water to flow in along the tangential direction of the tank wall, forming a rotating water flow, so that impurities gather towards the edge of the tank wall of the impurity removal tank 3 under the action of centrifugal force; the other end is tangent to the arc-shaped connecting surface 14, which extends towards the axis of the impurity removal tank 3, causing the rotating water flow to converge in the center of the impurity removal tank 3 and then be diverted again, which strengthens the disturbance effect of the water flow and further improves the impurity separation efficiency.

[0038] Specifically, the insulation cover 5 is also provided with an aluminum inlet 15 for convenient receiving of molten aluminum, and a splash guard 16 is provided at the aluminum inlet 15.

[0039] In this embodiment, the aluminum inlet 15 provides a convenient channel for receiving molten aluminum. Operators can receive molten aluminum without opening the entire insulation cover 5, reducing heat loss and operational complexity. The splash guard 16 fits tightly around the aluminum inlet 15, effectively preventing molten aluminum from splashing out due to violent reactions during feeding, thus avoiding burns to operators.

[0040] Specifically, the engaging device 6 includes a column 601, a winch motor 602, a steel cable 603, a steel cable winch 604, a winch connecting shaft 605, a steel cable fixing disc 606, a fixing disc connecting shaft 607, a winch frame 608, rollers 609, roller shafts 610, and roller frames 611. The steel cable winch 604 is fixedly connected to the winch connecting shaft 605. Both ends of the winch connecting shaft 605 are connected to the two sides of the winch frame 608 via bearings. The steel cable fixing disc 606 is inherently connected to the fixing disc connecting shaft 607. Both ends of the fixing disc connecting shaft 607 are connected to... The winch frame 608 has inherent connections on both sides. The roller frame 611 is located on the upper surface of the insulation cover 5, and both ends of the roller shaft 610 are connected to the roller frame 611 via bearings. The roller 609 is fixedly located in the middle of the roller shaft 610. One end of the steel cable 603 is wound on the steel cable winch 604, and the other end is fixedly located on the steel cable fixing plate 606. The middle part is sleeved on the roller 609. One end of the winch connecting shaft 605 extends to the outside of the winch frame 608 and is connected to the rotating shaft 709b of the winch motor 602 via a chain and sprocket connection. The steel cable winch 604 is located on the upper part of the steel cable fixing plate 606, and the winch motor 602 is fixedly connected to the column 601. The winch frame 608 is also fixedly connected to the column 601.

[0041] In this implementation scheme, when the winch motor 602 is running, the steel cable 603, under the winding and releasing of the steel cable winch 604 and guided by the roller 609, smoothly pulls or loosens the insulation cover 5, realizing its opening and closing operation. This effectively avoids heat loss or safety hazards caused by improper opening and closing of the insulation cover 5, and provides a guarantee for the efficient operation of the entire device.

[0042] Specifically, the mixing device 7 includes a connecting base 701 connected to the foundation, a rotary cylinder 702, a rotary plate 703, a second column 704, a set of linear guide rail pairs 705, a lifting motor 706, a lower sprocket 707, a connecting plate 708, a set of mixing components 709, and a chain 711. The base of the rotary cylinder 702 is inherently connected to the connecting base 701, and its output shaft is inherently connected to the lower end face of the rotary plate 703. The second column 704 is located on the upper end face of the rotary plate 703, and two linear guide rail pairs 705 are symmetrically arranged on both sides of the second column 704. The lifting motor 706 is fixedly mounted on... The assembly is placed on the second column 704, and its output shaft passes through the second column 704 and is connected to the lower sprocket 707 via the chain 711. The connecting plate 708 has a rectangular opening 710 for easy connection with the chain 711. The chain 711 has a closed loop structure and is fitted into the rectangular opening 710. One side of the chain 711 is connected to the connecting plate 708 to control the lifting and lowering of the connecting plate 708. Both sides of the connecting plate 708 are connected to the sliders on a set of linear guide rail pairs 705. There are two stirring components 709, both of which are set on the connecting plate 708. The lower sprocket 707 is connected to the second column 704 via a rotating shaft.

[0043] The stirring assembly 709 includes a stirring motor 709a, a stirring shaft 709b, and a stirring head 709c mounted on a connecting plate 708. The stirring shaft 709b is connected to the connecting plate 708 via a bearing, and its upper end is connected to the rotating shaft 709b of the stirring motor 709a via a synchronous belt and a synchronous pulley. Each stirring shaft 709b is provided with three stirring heads 709c, and the three stirring heads 709c are respectively located at the lower, middle, and upper parts of the stirring shaft 709b.

[0044] The stirring head 709c includes two symmetrically arranged discs 709ca, and a connecting block 709cb is provided between the two discs 709ca. The connecting block 709cb has three arc-shaped surfaces 709cc, and two adjacent arc-shaped surfaces 709cc are tangent to each other, and two adjacent arc-shaped surfaces 709cc form a breaking blade 709cd.

[0045] The stirring motor 709a on the side closer to the liquid collection tank 4 rotates clockwise, while the stirring motor 709a on the side farther away from the liquid collection tank 4 rotates counterclockwise.

[0046] In this embodiment, the stirring device 7 is located on one side of the heat preservation furnace body 1, specifically designed for degassing and removing impurities from the molten aluminum in the impurity removal tank 3. The connecting base 701 provides stable support for the entire stirring device 7, and the base of the rotary cylinder 702 is fixedly connected to it. Its output shaft is connected to the lower end face of the rotary plate 703. Through the extension and retraction of the rotary cylinder 702, the angle of the rotary plate 703 can be flexibly adjusted, thereby accurately positioning the stirring assembly 709 above the impurity removal tank 3 to adapt to different working conditions. The second column 704 is fixed to the upper end face of the rotary plate 703, providing an installation base for the linear guide rail pair 705 and the lifting motor 706. The two linear guide rail pairs 705 are symmetrically distributed on both sides of the second column 704, connecting to both sides of the connecting plate 708 to ensure that the lifting process of the connecting plate 708 is smooth and does not deviate. The lifting motor 706 is fixed on the second column 704. Its output shaft passes through the second column 704 and is connected to the lower sprocket 707 via a chain 711. The chain 711 is a closed-loop structure fitted into the rectangular opening 710 of the connecting plate 708, with one side connected to the connecting plate 708. When the lifting motor 706 starts, it drives the chain 711 to rotate, causing the connecting plate 708 to move up and down along the linear guide pair 705, thereby realizing the lifting and lowering of the stirring assembly 709 to meet the stirring requirements of molten aluminum at different depths. There are two stirring assemblies 709, both mounted on the connecting plate 708. Each stirring assembly 709 includes a stirring motor 709a, a stirring shaft 709b, and a stirring head 709c. The stirring motor 709a is connected to the upper end of the stirring shaft 709b via a synchronous belt and a synchronous pulley, driving the stirring shaft 709b to rotate. The three stirring heads 709c distributed on each stirring shaft 709b are located at the lower, middle and upper parts respectively. This multi-directional layout ensures that the molten aluminum is stirred in all directions.

[0047] The stirring shaft 709b is made of graphite and has a through-hole in the center through which nitrogen is supplied. This design, with its graphite material and through-hole, is standard in this field and will not be elaborated further. The nitrogen mixes with the harmful hydrogen gas in the molten aluminum. The hydrogen escapes along with the nitrogen during the degassing process, thus achieving degassing. Simultaneously, it powerfully disperses any potential impurity agglomerates, causing them to float to the surface of the molten aluminum during degassing and be removed by a slagging agent.

[0048] The stirring head 709c consists of two symmetrical upper and lower discs 709ca and a connecting block 709cb in the middle. The three arc-shaped surfaces 709cc on the connecting block 709cb are adjacent and tangent, forming a breaking blade 709cd. During the stirring process, the stirring head 709c rotates at high speed, and the breaking blade 709cd continuously impacts the molten aluminum, effectively breaking the air bubbles in the molten aluminum and causing the gas to escape. At the same time, it powerfully disperses impurities. Combined with the guide protrusion 12 of the impurity removal tank 3, it greatly improves the degassing and impurity removal effect. In addition, the stirring motor 709a on the side closer to the liquid collection tank 4 rotates clockwise, and the stirring motor 709a on the side farther away from the liquid collection tank 4 rotates counterclockwise. The two work together to promote convection in the molten aluminum in the impurity removal tank 3, accelerating the mixing and purification of the molten aluminum and further improving the impurity removal efficiency. At the same time, such convection can reduce the flow rate of molten aluminum from the impurity removal tank 3 to the liquid collection tank 4, increasing the impurity removal time of the molten aluminum.

[0049] Working principle:

[0050] During initial preparation, the insulation cover 5 is closed and tightly fitted to the insulation furnace body 1 via a hinge to minimize heat loss. The operator pours molten aluminum into the molten aluminum heating and insulation tank 2 through the aluminum inlet 15 on the insulation cover 5. After pouring, the heating rod 9 on the insulation cover 5 is activated, continuously heating the mixed molten aluminum in the molten aluminum heating and insulation tank 2. Because the molten aluminum heating and insulation tank 2 is well-sealed by the insulation cover 5 and the insulation furnace body 1, heat accumulation efficiency is high, allowing the molten aluminum to be gradually heated and maintained in a relatively stable and high-temperature environment. As the heating process progresses, the molten aluminum continuously replenishes heat to compensate for the lost heat. Under the influence of gravity, the molten aluminum naturally flows into the impurity removal tank 3 through the flow hole 10 near the bottom inner side of the insulation furnace body 1.

[0051] The molten aluminum flowing into the impurity removal tank 3 is immediately subjected to the action of the stirring device 7. Before operation, the rotary cylinder 702 drives the rotary plate 703 to rotate according to the preset program or operator instructions, precisely adjusting the position of the stirring component 709 above the impurity removal tank 3 to ensure that the stirring coverage is comprehensive and accurately positioned in the key areas of molten aluminum flow.

[0052] Subsequently, the lifting motor 706 starts, and through the transmission cooperation of the chain 711 and the lower sprocket 707, it drives the connecting plate 708 to descend along the linear guide pair 705, immersing the stirring component 709 into the molten aluminum to the appropriate depth. At this time, the two stirring components 709 work simultaneously. The stirring motor 709a on the side closer to the liquid collection tank 4 rotates clockwise, while the stirring motor 709a on the side farther from the liquid collection tank 4 rotates counterclockwise. This reverse rotation design promotes convection in the molten aluminum within the impurity removal tank 3, accelerating the mixing and circulation of the molten aluminum, ensuring that all parts of the molten aluminum are fully stirred.

[0053] Driven by a stirring motor 709a, the stirring shaft 709b rotates at high speed, causing the stirring heads 709c distributed at its lower, middle, and upper parts to agitate the molten aluminum in all directions. The special structure of the stirring head 709c plays a crucial role; it consists of two symmetrical upper and lower discs 709ca and a connecting block 709cb. Three adjacent, tangential arc-shaped surfaces 709cc on the connecting block 709cb form breaking blades 709cd. During the stirring process, the breaking blades 709cd continuously impact the molten aluminum, effectively breaking air bubbles and allowing them to escape. The stirring shaft 709b is made of graphite and has a through-hole in the center through which nitrogen is supplied. This design of the stirring shaft 709b, made of graphite and having a through-hole in the center, is a conventional design in this technical field and will not be elaborated further here. Nitrogen gas mixes with hydrogen gas, a harmful gas contained in molten aluminum. The harmful hydrogen gas escapes along with the nitrogen gas that escapes during the degassing process, thus achieving the degassing function. On the other hand, it powerfully disperses any possible impurity agglomerates, causing them to disperse in the molten aluminum. As the degassing process proceeds, these agglomerates float to the surface of the molten aluminum and are removed by a slag remover.

[0054] Meanwhile, the guide protrusions 12 on the inner wall of the impurity removal tank 3 work in concert. When molten aluminum flows in, the arc-shaped guide surface 13 guides the molten aluminum to flow tangentially along the tank wall, causing the molten aluminum to form a rotating water flow. Impurities gather towards the edge of the tank wall under the action of centrifugal force. Subsequently, the molten aluminum converges towards the center of the tank via the arc-shaped connecting surface 14 and is then diverted again, enhancing the disturbance effect of the water flow and further improving the separation efficiency of impurities and molten aluminum. Under the dual action of stirring and the guide protrusions 12, impurities are efficiently separated and gathered in the edge area of ​​the impurity removal tank 3, facilitating subsequent cleaning.

[0055] After thorough impurity removal, the molten aluminum flows into the collection tank 4 through a second flow hole 11 near the bottom between the impurity removal tank 3 and the collection tank 4. The second flow hole 11 has a square hole structure and a smaller cross-sectional area than the first flow hole 10. This design can control the flow rate of the molten aluminum from the impurity removal tank 3 to the collection tank 4, avoiding excessive flow rate that could cause impurities to re-mix into the molten aluminum. At the same time, the smaller cross-sectional area makes the collection tank 4 relatively independent, reducing the interference of external factors on the purified molten aluminum and ensuring that the purity of the molten aluminum in the collection tank 4 meets the requirements of the subsequent aluminum alloy wheel hub manufacturing process.

[0056] When the insulation cover 5 needs to be opened for operations such as cleaning molten aluminum or equipment maintenance, the locking device 6 is activated. The winch motor 602 operates, and its shaft is connected to the winch connecting shaft 605 via a chain, driving the winch connecting shaft 605 to rotate, which in turn drives the steel cable winch 604 fixed to it to rotate. As the steel cable winch 604 rotates, the steel cable 603, guided by the roller 609, smoothly pulls the insulation cover 5, causing it to slowly open around the hinge shaft. After the operation is completed, the winch motor 602 reverses, the steel cable winch 604 rotates in the opposite direction, releasing the steel cable 603, and the insulation cover 5 closes under its own weight or with auxiliary pushing, re-fitting tightly against the insulation furnace body 1, restoring good insulation.

[0057] The embodiments are detailed, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for degassing and heat preservation of molten aluminum in the manufacture of aluminum alloy wheel hubs, characterized in that, It includes a heat-insulating furnace body (1), a locking device (6), and a stirring device (7); The heat preservation furnace body (1) is provided with an aluminum molten heating and heat preservation tank (2), a cleaning tank (3) and a liquid collection tank (4), and a heat preservation cover (5) is provided on the side of the heat preservation furnace body (1) near the aluminum molten heating and heat preservation tank (2). The heat preservation cover (5) is connected to the heat preservation furnace body (1) by a hinge shaft. The locking device (6) is connected to the heat preservation cover (5) to control the opening and closing of the heat preservation cover (5). The stirring device (7) is set on one side of the heat preservation furnace body (1) to stir and remove impurities from the aluminum molten metal in the cleaning tank (3). When the heat preservation cover (5) is closed, it covers the aluminum molten heating heat preservation tank (2), and the heat preservation cover (5) is provided with a set of heating rods (9) for heating the mixed aluminum liquid in the aluminum molten heating heat preservation tank (2). The aluminum molten heating heat preservation tank (2) and the impurity removal tank (3) are connected through flow hole one (10), and the impurity removal tank (3) and the liquid taking tank (4) are connected through flow hole two (11). The flow hole one (10) and the flow hole two (11) are both located near the bottom of the inner side of the heat preservation furnace body (1). The inner wall of the impurity removal tank (3) is provided with two sets of flow guide protrusions (12). The flow guide protrusions (12) are provided with two symmetrically arranged arc-shaped flow guide surfaces (13) and an arc-shaped connecting surface (14). One end of the two arc-shaped flow guide surfaces (13) is designed to be tangent to the inner wall of the impurity removal tank (3), and the other end is respectively tangent to the two sides of the arc-shaped connecting surface (14). The arc-shaped connecting surface (14) extends to the axial position of the impurity removal tank (3).

2. The aluminum molten metal degassing and heat preservation device for aluminum alloy wheel hub manufacturing according to claim 1, characterized in that: The heat insulation cover (5) is also provided with an aluminum inlet (15) for easy receiving of molten aluminum, and a splash guard (16) is provided at the aluminum inlet (15).

3. The aluminum molten metal degassing and heat preservation device for aluminum alloy wheel hub manufacturing according to claim 2, characterized in that: The locking device (6) includes a column (601), a winch motor (602), a steel cable (603), a steel cable winch (604), a winch connecting shaft (605), a steel cable fixing disc (606), a fixing disc connecting shaft (607), a winch frame (608), rollers (609), roller shafts (610), and roller frames (611). The steel cable winch (604) is fixedly connected to the winch connecting shaft (605). The two ends of the winch connecting shaft (605) are connected to the two sides of the winch frame (608) through bearings. The steel cable fixing disc (606) is inherently connected to the fixing disc connecting shaft (607). The two ends of the fixing disc connecting shaft (607) are connected to the... The two sides of the winch frame (608) are inherently connected. The roller frame (611) is set on the upper surface of the heat insulation cover (5). The two ends of the roller shaft (610) are connected to the roller frame (611) through bearings. The roller (609) is fixedly set in the middle of the roller shaft (610). One end of the steel cable (603) is wound on the steel cable winch (604), and the other end is fixedly set on the steel cable fixing plate (606). The middle part is sleeved on the roller (609). One end of the winch connecting shaft (605) extends to the outside of the winch frame (608) and is connected to the shaft of the winch motor (602) through the connection of chain and sprocket.

4. The aluminum molten metal degassing and heat preservation device for aluminum alloy wheel hub manufacturing according to claim 3, characterized in that: The cable winch (604) is located on the upper part of the cable fixing plate (606), and the winch motor (602) is fixedly connected to the first column (601), and the winch frame (608) is also fixedly connected to the first column (601).

5. The aluminum molten metal degassing and heat preservation device for manufacturing aluminum alloy wheel hubs according to claim 4, characterized in that: The stirring device (7) includes a connecting base (701) connected to the foundation, a rotary cylinder (702), a rotary plate (703), a second column (704), a set of linear guide rail pairs (705), a lifting motor (706), a lower sprocket (707), a connecting plate (708), a set of stirring components (709), and a chain (711). The base of the rotary cylinder (702) is inherently connected to the connecting base (701), and its output shaft is inherently connected to the lower end face of the rotary plate (703). The second column (704) is located on the upper end face of the rotary plate (703), and the two linear guide rail pairs (705) are symmetrically arranged on both sides of the second column (704). The lifting motor (706) is fixedly installed on the second column (704). The output shaft passes through the second column (704) and is connected to the lower sprocket (707) via the chain (711). The connecting plate (708) is provided with a rectangular opening (710) for easy connection with the chain (711). The chain (711) has a closed loop structure and is fitted in the rectangular opening (710). One side of the chain (711) is connected to the connecting plate (708) to control the lifting and lowering of the connecting plate (708). The two sides of the connecting plate (708) are respectively connected to the sliders on a set of linear guide pairs (705). There are two stirring components (709), both of which are set on the connecting plate (708). The lower sprocket (707) is connected to the second column (704) via a rotating shaft.

6. The aluminum molten metal degassing and heat preservation device for aluminum alloy wheel hub manufacturing according to claim 5, characterized in that: The stirring assembly (709) includes a stirring motor (709a), a stirring shaft (709b), and a stirring head (709c) mounted on the connecting plate (708). The stirring shaft (709b) is connected to the connecting plate (708) via a bearing, and its upper end is connected to the rotating shaft of the stirring motor (709a) via a synchronous belt and a synchronous pulley. Each stirring shaft (709b) is provided with three stirring heads (709c), and the three stirring heads (709c) are respectively located at the lower, middle, and upper parts of the stirring shaft (709b).

7. The aluminum molten metal degassing and heat preservation device for manufacturing aluminum alloy wheel hubs according to claim 6, characterized in that: The stirring head (709c) includes two symmetrically arranged discs (709ca) on the upper and lower sides, and a connecting block (709cb) between the two discs (709ca). The connecting block (709cb) has three arc-shaped surfaces (709cc), and two adjacent arc-shaped surfaces (709cc) are tangential to each other, and two adjacent arc-shaped surfaces (709cc) form a breaking blade (709cd).

8. The aluminum molten metal degassing and heat preservation device for manufacturing aluminum alloy wheel hubs according to claim 7, characterized in that: The stirring motor (709a) on the side closer to the liquid collection tank (4) rotates clockwise, and the stirring motor (709a) on the side farther away from the liquid collection tank (4) rotates counterclockwise.

9. The aluminum molten metal degassing and heat preservation device for manufacturing aluminum alloy wheel hubs according to claim 1, characterized in that: The first flow hole (10) has a circular opening structure, the second flow hole (11) has a square opening structure, and the cross-sectional area of ​​the second flow hole (11) is smaller than the cross-sectional area of ​​the first flow hole (10).

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