Magnesium and Gold Wheel Styling Techniques

Molding process characteristics and application of magnesium alloy wheels At present, the wheel forming process of magnesium alloys is divided into liquid forming process and solid forming process. Liquid forming process Under the premise of guaranteeing the mechanical properties of wheels, the liquid forming process is adopted, which can not only improve the utilization of materials (Up to 90% or more), but also can reduce production costs, but the casting defects can not ensure product performance, but also because of expensive production equipment, it is difficult to promote the main liquid forming process is as follows:

(l) Metal-type gravity casting forming process Metal-type gravity casting refers to the casting process of molten metal casting under the action of gravity of the metal. The surface of the metal-type cavity is bright and smooth, and the rigidity is high. The parts that are cast using this process have a surface quality. Good dimensional accuracy, high cutting allowance, low production efficiency, high metallurgical performance, and small casting grain size after solidification, which can improve the mechanical properties of the castings. Shaanxi Huaxing Aircraft Engine Co., Ltd.4, Metal Type Gravity Casting Method As AM60B magnesium alloy automobile wheel castings, the casting quality is 9.5kg, the finished product rate is 65%, the product quality is stable, and it is suitable for mass production. It has accumulated experience for the application of cast magnesium alloy on cars.

(2) Pressure casting forming process Pressure casting is a process in which a liquid or semi-liquid metal is filled into a human mold cavity at a high speed at a high pressure, and a casting is obtained by forming and solidifying under pressure. Pressure casting is distinguished from other casting methods. Main features: First, high pressure, liquid metal fills the cavity under pressure, and crystallizes and solidifies under higher pressure; second, high speed, metal liquid can fill the cavity casting in a very short time under high speed and high pressure. Forming, can produce thin-walled parts with complex shapes and sharp contours, high dimensional accuracy, good surface quality, and fine organization, high mechanical properties, but the investment in the process method is large, the cost of high-pressure production is long, and the working conditions are poor , The equipment is easily damaged. Nippon Light Metals Co., Ltd. produced a series of AM60 magnesium alloy automotive tires and motorcycle tires by using oxygen-filled die casting. The tensile strength was 240-270 MPa, and the elongation rate was 4%-8% of Italian Fiats. ) In cooperation with DOW in the United States, the AM6oA alloy was used to produce die-cast magnesium alloy wheels that could meet the requirements of AM60 developed by General Motors of the United States. B magnesium alloy die-casting wheels, tensile strength 240-270MPa, yield strength 120-150MPa, elongation 4%-8%.

The solid-state forming process produces a wheel manufactured through a solid-state forming process, which has good toughness, high strength and precision, and good surface quality. The disadvantage is that there are many production processes, and the main solid-state forming process with plastic deformation resistance is as follows:

Extrusion process extrusion is the application of pressure on the metal placed inside the container (squeeze tube) to allow it to flow out from a specific die hole to obtain the desired cross-sectional shape and size. A plastic processing method due to the magnesium alloy plasticity Poor deformability, high temperature and equipment requirements, extrusion process than the forging process process wheel In addition to the advantages of solid state process forming wheel, the most prominent advantage is also that it can achieve precision forming, parts less processing or The processed surface occupies a high percentage of the total surface area, and the material utilization rate is higher than other solid forming processes. Extrusion methods can improve product quality. Reduce raw material consumption. Save energy. Improve labor productivity and reduce casting costs. Cao Yaqiang et al. The application of Az31 Magnesium alloy wheel remanufactured parts shows that the microstructure of the extruded parts is uniform and small, the tensile strength can reach 250 to 260 MPa, the elongation rate can reach 12% to 14%, and the quality of the parts is good. The mold is reasonable and feasible.

The development trend of magnesium alloy wheels Under the requirements of international energy conservation and environmental protection, some foreign companies have trial-produced and produced magnesium alloy wheel yi. Their applications include the development of high-end motorcycles and limousines along with the continuous research and development of magnesium alloy related technologies. The cost will surely be reduced, and the wheels of the future will gradually become popular. Al-Mg alloy materials At present, some domestic companies have begun to develop mass production of magnesium alloy wheels. More and more university and other scientific research institutions have begun systematic research and production of magnesium alloy wheels. Yi, a new forming process for magnesium alloy wheels will surely become more and more obvious. The domestic magnesium alloy wheel has great potential for development, and magnesium alloy wheels will surely have a huge market demand. Therefore, the engineering of magnesium alloy wheels has been realized. Very important significance.