Manufacturing method of light-weight heat-free alloy automobile hub

Abstract

The invention relates to a manufacturing method of a light-weight heat-alloy-free automobile hub, which comprises the following steps of: firstly, preparing an alloy raw material, then smelting and casting, and casting a light alloy into a barrel shape by a gravity inclined casting method; then spinning the drum into the required wheel rim by using a spinning machine; machining is conducted after heat treatment is conducted, and a rim semi-finished product needed before wheel welding is formed; meanwhile, spokes in various shapes are cast through a vibration pressurizing casting method, and machining is carried out; the rim and the spoke are welded to form a hub blank through friction stir welding or inertia friction welding; and finally, through machining and surface treatment, the finished hub meeting the technical requirements is obtained, and the finished hub is packaged and warehoused. According to the light-weight heat-free alloy automobile hub, the fine grain casting spoke, the casting and spinning rim and the friction welding technology are adopted for producing the light-weight heat-free alloy automobile hub, the comprehensive performance of the hub is remarkably improved, light weight of the automobile hub is achieved, and the requirements of modern automobiles for light weight, strength and performance are met.

Description

Technical Field

[0001] This application relates to the field of automobile wheel manufacturing, and in particular to a method for manufacturing a lightweight, heat-free alloy automobile wheel. Background Technology

[0002] Currently, almost all cast aluminum alloy wheels use A356.2 (ZL101A), an alloy containing 0.25-0.4% Mg. After T6 treatment, the strength of the material is improved through the solid solution and precipitation of Mg2Si. Since the wheels require surface coating after heat treatment, the wheel hardness increases after the coating and baking process, resulting in poor impact resistance and sometimes failing impact tests. To avoid this, wheel manufacturers use incomplete aging during heat treatment to control low hardness; they also control multiple rework during coating to prevent excessive hardness increase; some manufacturers can only increase strength by thickening the material wall, thus increasing the wheel's weight.

[0003] To address the above issues and ensure that the wheels are both high-performing and lightweight, this patent adopts a method of manufacturing the spokes and rims separately. The spokes are made of heat-free alloy and do not require heat treatment, thus avoiding excessive wheel hardness and poor material impact toughness caused by heat treatment and painting processes. Summary of the Invention

[0004] To address the technical problems of excessively high wheel hardness and poor material impact toughness, this application provides a method for manufacturing a lightweight, heat-free alloy automotive wheel hub.

[0005] The manufacturing method of a lightweight, heat-free alloy automobile wheel hub provided in this application adopts the following technical solution: A method for manufacturing a lightweight, heat-free alloy automotive wheel hub includes the following steps: Rim forming: Step 1: Preparation of alloy raw materials; Step Two: Melting and Casting; After the alloy raw materials are smelted, the liquid alloy is cast into a cylinder using gravity tilting casting method and a specified casting mold; Step 3: Spinning; A spinning machine is used to spin the cylinder into the rim of the desired wheel; Step 4: Heat Treatment The wheel rim is treated with T6 to improve its mechanical properties. Step 5: Rough machining; Processed into semi-finished wheel rims required before wheel welding; Spoke forming: Step 1: Preparation of alloy raw materials; Step Two: Melting and Casting; Liquid alloys are cast into spokes of various shapes using vibration pressure casting and a specified casting mold; Step 3: Rough machining; The wheels are machined into semi-finished products required for welding using a CNC lathe. Wheel hub forming: Step 1: Composite welding; The wheel rim and spokes are welded together using friction stir welding or friction inertia welding to form a wheel hub blank; Step 2: Machining; The wheel hub blank is machined according to the technical requirements; Step 3: Surface treatment; after surface treatment, the finished wheel hub is formed; Step 4: Packaging and warehousing.

[0006] By adopting the above technical solutions and using high-strength alloy materials, combined with advanced processes such as gravity tilting casting, spinning, and vibration pressure casting, the weight of the wheel hub can be significantly reduced while ensuring its high strength, achieving lightweighting of automotive wheels. The use of vibration pressure casting technology and precision machining processes optimizes the alloy's grain structure and increases its density, effectively enhancing the wheel hub's fatigue resistance, impact resistance, and strength. During the wheel hub manufacturing process, CNC machine tools and precision spinning processes ensure the dimensional accuracy and surface quality of the wheel hub, meeting the high precision and high appearance quality requirements of modern automobiles. By employing friction stir welding or inertia friction welding technologies, the wheel rim and... The welded joints of the wheel spokes offer superior strength and toughness, enhancing the overall structural strength of the wheel hub while avoiding potential welding defects associated with traditional welding processes. The T6 heat treatment process provides the wheel hub material with higher corrosion resistance and improved mechanical properties, enhancing its long-term reliability and durability. Surface treatment technologies such as coatings increase the surface hardness of the wheel hub, strengthening its corrosion resistance and resulting in a higher-quality appearance, meeting market demands for high-performance, aesthetically pleasing wheels. Automated packaging equipment and moisture-proof materials ensure the wheel hub remains unaffected by environmental factors during transportation and storage, maintaining its quality and appearance.

[0007] Optionally, the alloy raw material is an aluminum-silicon alloy, an aluminum-magnesium alloy, or a magnesium alloy, and the strengthening elements include silicon, magnesium, copper, zinc, etc.

[0008] By adopting the above technical solutions, using aluminum-silicon alloy, aluminum-magnesium alloy, or magnesium alloy as raw materials, and adding reinforcing elements such as silicon, magnesium, copper, and zinc, the strength, hardness, and corrosion resistance of the lightweight alloy can be effectively improved. The addition of reinforcing elements enhances the impact resistance and fatigue resistance of the wheel hub, reduces the density of the alloy to a certain extent, achieves the goal of lightweighting, and improves the machinability and weldability of the alloy, making the entire manufacturing process more efficient and stable, and ensuring the high quality and performance of the wheel hub.

[0009] Optionally, the gravity tilting casting method uses a casting mold with a predetermined cooling channel to increase the cooling rate of the light alloy during the casting process and ensure the fine-grained structure of the casting.

[0010] By adopting the above technical solutions, the cooling rate of the light alloy can be effectively controlled, promoting rapid solidification of the alloy during the casting process. Rapid cooling helps to refine the grain structure, increase the density of the alloy, and reduce casting defects, thereby improving the strength, hardness, and toughness of the casting. The fine grain structure not only enhances the mechanical properties of the wheel hub but also improves its fatigue resistance and impact resistance, ensuring the reliability and long-term durability of the light alloy wheel hub in use.

[0011] Optionally, the spinning machine is a CNC spinning machine, and a temperature control system is used to regulate the temperature during the spinning process to ensure the uniformity and strength of the wheel rim.

[0012] By adopting the above technical solution, the temperature change during the spinning process is precisely controlled, ensuring the uniformity and stability of the alloy during the forming process. This effectively avoids the impact of temperature fluctuations on the performance of the alloy material, ensures the uniform thickness of the wheel rim, avoids defects, and the temperature control system helps to improve the strength of the rim, improve the plasticity and ductility of the material, so that the final formed rim has better mechanical properties and a longer service life.

[0013] Optionally, the vibration-pressure casting method improves the density of the alloy and enhances the mechanical properties of the casting by combining vibration and pressure.

[0014] By adopting the above technical solutions, the fluidity and density of the light alloy are effectively improved, the generation of porosity and inclusions during the casting process is reduced, the internal structure of the casting is optimized, the alloy material is made more uniform and dense, and the grains are refined. This significantly improves the strength, hardness and toughness of the casting. The improved mechanical properties enhance the fatigue resistance and impact resistance of the wheel hub, and also improve its stability and reliability under extreme working conditions, ensuring the quality of the high-performance alloy wheel hub.

[0015] Optionally, the friction welding method involves a solid connection during the welding process to enhance the strength and toughness of the welded joint; ensuring the stability and reliability of the wheel hub's welded joint under high-intensity loads and long-term use, and further improving the overall performance of the wheel hub.

[0016] Optionally, the heat treatment step is a T6 heat treatment process that combines solution treatment and artificial aging, which can further improve the strength and fatigue resistance of the alloy material.

[0017] By adopting the above technical solutions, the strength and fatigue resistance of the alloy are significantly improved. The solution treatment process effectively releases the internal stress in the casting and improves the microstructure of the material. Artificial aging improves the hardness and fatigue resistance of the alloy through the precipitation of strengthening phases, enhances the durability of the rim under long-term load and impact, improves its resistance to deformation and corrosion, and ensures the long-term reliability and stability of the light alloy wheel hub in high-intensity use environments.

[0018] Optionally, the machining steps include turning, milling, and drilling to meet the dimensional and precision requirements of the wheel hub.

[0019] By adopting the above technical solutions, the size and shape of the wheel hub can be precisely controlled to ensure that it meets strict technical requirements, achieve high-precision dimensional control and surface finish, ensure the accuracy of the wheel hub's geometry and hole positions, improve the overall precision of the wheel hub, and ensure its reliability and stability during installation and use, thus meeting the stringent requirements of high-performance vehicles.

[0020] Optionally, the surface treatment steps include sandblasting, pickling, anodizing, polishing, coating, electroplating, etc., to increase the corrosion resistance and aesthetics of the wheel hub.

[0021] By adopting the above technical solutions, the corrosion resistance and appearance quality of the wheel hub are significantly improved. Sandblasting helps to remove surface impurities and provide uniform roughness; pickling removes the oxide layer and ensures surface cleanliness; anodizing can form a protective oxide film on the alloy surface, enhancing corrosion resistance and wear resistance; polishing, painting, and electroplating further improve the appearance gloss and weather resistance of the wheel hub.

[0022] Optionally, the packaging and warehousing step employs automated packaging equipment and uses moisture-proof materials during the packaging process to ensure that the wheel hubs are protected from environmental factors during transportation and storage.

[0023] By adopting the above technical solutions, the packaging efficiency and protection of wheel hubs are effectively improved. Automated packaging equipment ensures the consistency of each wheel hub during the packaging process, reduces errors caused by human operation, and moisture-proof materials effectively prevent the impact of moisture and other environmental factors on the surface and performance of the wheel hubs, avoid corrosion or damage caused by moisture, ensure that the wheel hubs remain intact during transportation and storage, prevent the negative impact of the external environment on the quality of the wheel hubs, and improve product reliability and customer satisfaction.

[0024] In summary, this application includes at least one of the following beneficial technical effects: By employing high-strength alloy materials and advanced manufacturing processes (such as gravity tilt casting, spinning, and vibration pressure casting), lightweight wheel hubs have been achieved while maintaining excellent mechanical properties, meeting the dual requirements of modern automobiles for wheel hub weight and strength.

[0025] By employing vibration pressure casting technology, inertial or friction stir welding processes, and T6 heat treatment, the fatigue resistance, impact resistance, and corrosion resistance of the wheel hub are significantly enhanced, ensuring the long-term reliability and stability of the wheel hub in high-intensity operating environments.

[0026] Through precision CNC machining, spinning, and welding technologies, the dimensional accuracy and surface quality of the wheel hubs are ensured, meeting the stringent requirements of high-performance vehicles for precision and aesthetics.

[0027] The use of friction welding solid-state welding technology enhances the strength and toughness of the welded joint, avoids the defects caused by traditional welding processes, and improves the overall structural strength of the welded area.

[0028] Surface treatment processes such as sandblasting, pickling, anodizing, polishing, painting, and electroplating significantly improve the corrosion resistance and aesthetics of the wheel hubs, giving them better wear resistance and appearance quality during use.

[0029] Automated packaging equipment and moisture-proof materials are used to effectively protect the quality and appearance of the wheel hubs during transportation and storage, avoid the impact of environmental factors, and improve product reliability and customer satisfaction. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a manufacturing method for a lightweight, heat-free alloy automotive wheel hub.

[0031] Figure 2 This is a schematic diagram of the wheel hub casting and the spun semi-finished product.

[0032] Figure 3 This is a schematic diagram of the wheel spoke casting and the semi-finished product after the spokes have been machined.

[0033] Figure 4These are schematic diagrams of the finished wheel after welding and after processing. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0035] This application discloses a method for manufacturing a lightweight, heat-free alloy automotive wheel hub. (Refer to...) Figures 1-4 The manufacturing method includes the following steps: Rim forming: Step 1: Preparation of alloy raw materials; Step Two: Melting and Casting; After the alloy raw materials are smelted, the liquid alloy is cast into a cylinder using gravity tilting casting method and a specified casting mold; Step 3: Spinning; A spinning machine is used to spin the cylinder into the rim of the desired wheel; Step 4: Heat Treatment The wheel rim is treated with T6 to improve its mechanical properties. Step 5: Rough machining; Processed into semi-finished wheel rims required before wheel welding; Spoke forming: Step 1: Preparation of alloy raw materials; Step Two: Melting and Casting; Liquid alloys are cast into spokes of various shapes using vibration pressure casting and a specified casting mold; Step 3: Rough machining; The wheels are machined into semi-finished products required for welding using a CNC lathe. Wheel hub forming: Step 1: Composite welding; The wheel rim and spokes are welded together using friction stir welding or friction inertia welding to form a wheel hub blank; Step 2: Machining; The wheel hub blank is machined according to the technical requirements; Step 3: Surface treatment; after surface treatment, the finished wheel hub is formed; Step 4: Packaging and warehousing.

[0036] In this embodiment, the spokes are made of a heat-free alloy (AlSi10MgMn), which does not require heat treatment, thus avoiding excessive wheel hardness and poor impact toughness due to heat treatment and painting. The wheel rim is made of heat-free alloy (AlSi10MgMn) and undergoes a casting-spinning process followed by heat treatment to improve its strength. Using the same material to manufacture the rim and spokes facilitates the recycling of aluminum scrap byproducts and reduces production costs.

[0037] In practice, the wheel hub material of this application uses high-strength aluminum alloy, preferably aluminum-silicon alloy or aluminum-magnesium alloy. The strengthening elements (such as silicon, magnesium or copper) contained in aluminum-silicon alloy or aluminum-magnesium alloy effectively improve the strength, hardness and corrosion resistance of aluminum alloy. These strengthening elements enhance the impact resistance and fatigue resistance of aluminum alloy, and at the same time reduce the density of aluminum alloy to a certain extent, which helps to achieve the goal of ultra-lightweighting. In actual operation, the raw materials are weighed and proportioned according to specific requirements to ensure the uniformity of its alloy composition and meet the required performance standards. After the aluminum alloy raw materials are prepared, they are sent to the melting furnace for melting.

[0038] After the aluminum alloy raw materials are prepared, melting and casting are carried out. First, the aluminum alloy raw materials are heated to a suitable casting temperature (generally 680℃ to 720℃) in a high-temperature melting furnace to ensure that the material is completely melted into a liquid state. The molten liquid aluminum alloy is then cast using gravity tilting casting. Gravity tilting casting uses a designated casting mold, and the direction and speed of the aluminum alloy liquid flow are controlled by tilting the mold. During this process, a casting mold with a predetermined cooling channel is used to increase the cooling rate of the aluminum alloy. Rapid cooling promotes the rapid solidification of the aluminum alloy and refines the grains, thereby increasing the density of the aluminum alloy, reducing casting defects, and enhancing the mechanical properties of the aluminum alloy. After casting is completed, the aluminum alloy cylinder is removed from the mold and prepared for the next process.

[0039] The cast cylinder is fed into a spinning machine for rim forming. The spinning process involves applying uniform rotational pressure to the aluminum alloy cylinder using a CNC spinning machine, causing it to gradually expand in the radial direction to form the desired wheel rim shape. During the spinning process, a temperature control system is used to precisely regulate the temperature of the aluminum alloy, ensuring that the aluminum alloy maintains a uniform temperature during forming. This avoids material property differences caused by temperature fluctuations. This process effectively controls the rim thickness, ensuring its uniformity and reducing defects caused by uneven temperature. At the same time, precise temperature control helps to improve the strength of the rim, enhance the plasticity and ductility of the aluminum alloy, thereby improving the mechanical properties and service life of the rim.

[0040] After spinning, the wheel rim undergoes T6 treatment and then enters the machining process. CNC machine tools are used for turning, milling, and drilling. Precision machining ensures the dimensional accuracy and surface finish of the wheel rim, meeting the technical requirements before wheel welding. During the machining process, the CNC system precisely controls the tool path, cutting parameters, and machining methods to ensure the accuracy of the wheel rim's geometry and hole positions.

[0041] After the rim is machined, the wheel spokes are cast. The wheel spokes are cast using a vibration pressure casting method, which uses a specified casting mold to cast liquid aluminum alloy into spokes of various shapes. Vibration pressure casting technology effectively improves the fluidity and density of aluminum alloy by combining vibration and pressure, reducing porosity and inclusions that may be generated during the casting process. The vibration and pressure optimize the internal structure of the aluminum alloy, making it more uniform and dense, significantly improving the strength, hardness and toughness of the casting, greatly improving the fatigue resistance and impact resistance of the spokes, and ensuring the long-term stability of the wheel hub in complex operating environments.

[0042] After casting, the wheel spokes enter the machining stage. The wheel spokes are turned and milled using a CNC lathe to ensure that the size and shape of the wheel spokes meet the requirements before wheel welding, remove irregularities from the casting process, ensure the surface flatness and accuracy of the wheel spokes, and properly treat the joint surface of the wheel spokes to ensure the welding accuracy with the wheel rim.

[0043] Friction stir welding or inertial friction welding is used to weld the rim and spokes together to form the hub blank. Friction stir welding is a high-efficiency, low-temperature solid-state welding technology that provides a high-strength and stable weld joint, avoiding welding defects that may occur in traditional welding methods, such as cracks and holes, and ensuring the reliability of the welded area.

[0044] After welding, the wheel hub blank will enter the machining stage again to perform precision machining on the wheel hub to meet strict dimensional and accuracy requirements. During the machining process, high-precision CNC machine tools are used to perform turning, milling and drilling operations to ensure that the geometry and hole positions of the wheel hub are accurate.

[0045] After machining, the wheel hub will undergo surface treatment, including sandblasting, pickling, anodizing, polishing, painting, and electroplating. Sandblasting helps remove impurities from the wheel hub surface and provides uniform roughness; pickling removes the oxide layer to ensure surface cleanliness; and the protective oxide film formed by anodizing enhances the wheel hub's corrosion resistance and wear resistance, further improving its mechanical properties.

[0046] The painting and electroplating processes not only enhance the gloss of the wheel hub's appearance but also provide a certain degree of weather resistance, allowing the wheel hub to maintain a good appearance and protection during long-term use.

[0047] After all the processing and surface treatments, the wheels finally enter the packaging stage. Automated packaging equipment is used to ensure the consistency of packaging for each wheel and reduce errors from manual operation. During the packaging process, moisture-proof materials are used to protect the wheels and prevent moisture and other environmental factors from affecting the quality and appearance of the wheels. The moisture-proof materials effectively prevent corrosion or damage to the wheels during transportation and storage, ensuring that the wheels maintain good quality and appearance when they arrive at the customer's location.

[0048] The technical advantages of this application are: 1. The manufacturing method of lightweight heat-free alloy automotive wheels involves the rational selection of high-strength alloy materials and the combination of advanced processes such as gravity tilt casting, spinning, vibration pressure casting, and precision machining to achieve a balance between high strength and lightweight. Simultaneously, the use of friction stir welding, T6 heat treatment, and fine surface treatment ensures the high quality and high performance of the wheels, meeting the requirements of modern automobiles for high precision, aesthetics, and durability. The comprehensive application of these processes gives the lightweight heat-free alloy automotive wheels higher strength, corrosion resistance, fatigue resistance, and impact resistance.

[0049] 2. Technological Innovation - Modular Combined Production: Manufacturing the rim and spokes separately enables modular and standardized production.

[0050] a) Wheel rim --- Lightweight wheel rim is achieved by using a casting and turning process; b) Wheel spokes – adaptable to personalized, flexible, and rapid production; 3. Material Innovation --- Different manufacturing processes are used for rims and spokes depending on the structural characteristics of the wheel.

[0051] a) Wheel rims – High-strength lightweight alloy castings are produced by casting and then spinning to achieve mass production; b) Spokes – Made of highly fluid cast lightweight alloys, using low-temperature semi-solid forming technology to improve the material properties of the castings.

[0052] 4. Structural Innovation --- Applying friction stir welding or inertial friction welding technology to composite weld the rim and spokes.

[0053] a) Wheel Rim --- The spinning process significantly improves the mechanical properties of the rear flange, overcomes the problems of rear flange deformation and cracking, and greatly enhances the wheel rim's resistance to 90° impact deformation.

[0054] b) Wheel spokes – When combined with the rim, they form a hollow structure, which significantly reduces the weight of the wheel, improves the stress distribution of the wheel, and enhances its resistance to fatigue and deformation.

[0055] 5. Manufacturing the rim and spokes separately reduces the technical difficulty of wheel manufacturing, reduces the cost of casting molds, and thus reduces manufacturing costs. It is a perfect combination of casting and spinning processes.

[0056] 6. Vibration pressure casting of wheel spokes results in finer grains in the castings, with the secondary dendrite spacing being 20% ​​smaller than that of integrally cast wheels. This can significantly improve the material properties of the wheel spokes, reduce the wall thickness of the wheel spokes, and reduce the weight of the wheel spokes by about 5-10%. As a result, the weight of the wheel hub is reduced by 5-10% compared to that of integrally cast wheels.

[0057] The implementation principle of the manufacturing method of a lightweight, heat-free alloy automobile wheel hub according to an embodiment of this application is as follows: The aluminum alloy material used for the wheel hub is AlSi10MgMn heat-free alloy, which has excellent strength, hardness, and corrosion resistance, improves the fatigue resistance and impact resistance of the aluminum alloy, and reduces density, thereby effectively achieving the goal of lightweighting; the aluminum alloy raw material is heated to 680°C to 720°C in a melting furnace to ensure complete melting, and then the liquid aluminum alloy is cast into a cylindrical shape using a gravity tilting casting method, combined with a cooling channel to accelerate cooling. This process rapidly solidifies the aluminum alloy, refines its grain size, optimizes its density, reduces casting defects, and improves its mechanical properties. Through spinning, the aluminum alloy cylinder is gradually expanded into the desired rim shape. A temperature control system ensures uniform temperature during spinning. After spinning, the rim undergoes T6 heat treatment, including solution treatment and artificial aging, which enhances its hardness and fatigue resistance, thereby improving the rim's strength and ductility. Following heat treatment, the rim is CNC machined to ensure dimensional accuracy and surface finish, meeting welding requirements. The technical requirements are as follows: Through a combination of vibration and pressure, the fluidity and density of the aluminum alloy are improved, porosity and inclusions are reduced, and the internal structure of the aluminum alloy is optimized, thereby significantly improving the strength, hardness, and toughness of the casting. After casting, the spokes are machined by CNC machine tools to ensure that the dimensions and shape meet welding requirements. Friction stir welding or inertial friction welding technology is used to weld the rim and spokes together to form the wheel hub blank. Welding provides a high-strength and stable weld joint, avoiding the defects of traditional welding. The welded wheel hub blank will then undergo precision machining after heat treatment to ensure that the dimensions and shape of the wheel hub meet strict precision requirements. Afterwards, the wheel hub surface will undergo surface treatment processes such as sandblasting, pickling, anodizing, polishing, painting, and electroplating to enhance the wheel hub's corrosion resistance, wear resistance, and aesthetics, while also improving its weather resistance. After processing and surface treatment, the wheel hub is packaged using automated packaging equipment and protected with moisture-proof materials to prevent moisture and other environmental factors from affecting the quality and appearance of the wheel hub, ensuring that the wheel hub remains intact during transportation and storage. Through this series of precisely controlled processes, the lightweight, heat-free alloy automotive wheel manufacturing method of this application not only meets the high requirements of modern automobiles for lightweight, strength, durability and appearance, but also reduces production costs and improves the overall performance and market competitiveness of the product through material innovation and process optimization.

[0058] 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. A method for manufacturing a lightweight, heat-free alloy automotive wheel hub, characterized in that: Includes the following steps: Rim forming: Step 1: Preparation of alloy raw materials; Step Two: Melting and Casting; After the alloy raw materials are smelted, the liquid alloy is cast into a cylinder using gravity tilting casting method and a specified casting mold; Step 3: Spinning; A spinning machine is used to spin the cylinder into the rim of the desired wheel; Step 4: Heat Treatment The wheel rim is treated with T6 to improve its mechanical properties. Step 5: Rough machining; Processed into semi-finished wheel rims required before wheel welding; Spoke forming: Step 1: Preparation of alloy raw materials; Step Two: Melting and Casting; Liquid alloys are cast into spokes of various shapes using vibration pressure casting and a specified casting mold; Step 3: Rough machining; The wheels are machined into semi-finished products required for welding using a CNC lathe. Wheel hub forming: Step 1: Composite welding; The wheel rim and spokes are welded together using friction stir welding or friction inertia welding to form a wheel hub blank; Step 2: Machining; The wheel hub blank is machined according to the technical requirements; Step 3: Surface treatment; After surface treatment, the finished wheel hub is formed; Step 4: Packaging and warehousing.

2. The manufacturing method according to claim 1, characterized in that: The alloy raw materials are aluminum-silicon alloy, aluminum-magnesium alloy, and magnesium alloy, and the strengthening elements include silicon, magnesium, copper, zinc, etc.

3. The manufacturing method according to claim 1, characterized in that: The gravity tilting casting method uses a casting mold with a predetermined cooling channel to increase the cooling rate of the light alloy during the casting process and ensure the fine-grained structure of the casting.

4. The manufacturing method according to claim 1, characterized in that: The spinning machine is a CNC spinning machine. During the spinning process, a temperature control system is used to regulate the temperature of the casting to ensure the uniformity and strength of the wheel rim.

5. The manufacturing method according to claim 1, characterized in that: The vibration-pressure casting method combines vibration and pressure to increase the cooling rate of the casting, ensuring a fine-grained structure and improving the mechanical properties of the casting.

6. The manufacturing method according to claim 1, characterized in that: The rim is heat-treated to increase its material strength, thereby reducing the rim wall thickness and achieving its lightweight design; the spokes are not heat-treated to avoid affecting the material's impact toughness during painting and subsequent processing.

7. The manufacturing method according to claim 1, characterized in that: The heat treatment step is a T6 heat treatment process that combines solution treatment and artificial aging, which can further improve the strength and fatigue resistance of light alloy materials.

8. The manufacturing method according to claim 1, characterized in that: The machining steps include turning, milling, and drilling to meet the size and precision requirements of the wheel hub.

9. The manufacturing method according to claim 1, characterized in that: The surface treatment steps include sandblasting, pickling, anodizing, polishing, coating, and electroplating to increase the corrosion resistance and aesthetics of the wheel hub.

10. The manufacturing method according to claim 1, characterized in that: The packaging and warehousing process employs automated packaging equipment and uses moisture-proof materials during packaging to ensure that the wheel hubs are protected from environmental factors during transportation and storage.

Images