Spinning process for automobile aluminum alloy hub

Abstract

The invention discloses a spinning process of an automobile aluminum alloy hub. The spinning process comprises the following steps that (1), a spinning die is heated to enable the temperature to reach270-290 DEG C, a release agent is sprayed on the surface of the spinning die, an aluminum alloy hub blank is taken out from a casting die, and the aluminum alloy hub blank is directly put into a heating furnace to continue heating until the temperature reaches 355-375 DEG C; (2), a manipulator grabs the aluminum alloy hub blank coming out of the heating furnace and places the aluminum alloy hub blank on the spinning die, and an upper tail jacking tool above the spinning die is controlled to jointly clamp an aluminum alloy hub blank with the spinning die; (3), the aluminum alloy hub blank is subjected to spinning machining by a spinning tool; and (4), the upper tail jacking tool is controlled to ascend to the original point, and an ejector ejects a spinning blank completing the spinning machining process upwards, so that the spinning blank is separated from the spinning die. According to the spinning process, the production period is short, product processing precision and quality canbe effectively guaranteed, and energy consumption is saved.

Description

technical field [0001] The invention relates to the field of manufacturing aluminum alloy wheels, in particular to a spinning process for aluminum alloy wheels of automobiles. Background technique [0002] With the rapid development of the automobile industry, people have higher and higher requirements for the design diversification and mechanical properties of automobile wheels. Aluminum alloy spinning wheels have been widely used because of their better density and rigidity, lighter weight and more durability. application. However, the traditional spinning process is only suitable for some high-end car markets due to its many process steps, long processing cycle and high processing cost, and has not been widely used in the middle and low-end car market. The processing technology of the traditional automotive aluminum alloy casting hub includes nine processes: casting, degating, deburring, center hole, heating, spinning, heat treatment, machining, and coating protection. ...

AI Technical Summary

Problems solved by technology

This existing spinning process has the following defects: 1. There is no positioning end face on the inner side of the rim of the aluminum alloy wheel blank. Adaptation and positioning problems, long production cycle, large investment in equipment and labor, and high production costs; 2. Aluminum alloy wheel blanks are greatly affected by punching, deburring, and machining accuracy of the center hole of the car; 3. Aluminum alloy wheels The blank rim of the wheel hub is relatively short, and the angle A1 between the outer wall of the rim and the horizontal line is 69 degrees. The wheel hub here is an 18-inch diameter automotive aluminum alloy wheel rim (the following examples refer to the wheel hub of this specification), and the rim is in the vertical direction. The height H1 of the rim is 87 mm, the thickness of the end of the rim E1 (D2=25.27mm) is large and increases too fast, the thickness of the end of the rim is large, and it is easy to have the defect that the spinning is not in place during the spinning process, and the rapid increase of the thickness will also cause During the spinning process, the force on the equipment is uneven, and overloading will cause the knife to jam and cause an alarm. There is a strong downward pulling force. If it is too thin, it will be deformed or broken. If it is too thin, the aluminum water channel is too small and it is not conducive to casting; 4. The aluminum alloy wheel blank (usually at a temperature of 260~ 290 degrees) needs to be cooled to normal temperature to be able to perform machining such as degating, deburring, and center hole of the car, while the aluminum alloy wheel blank needs to be heated to about 365 degrees during spinning, which consumes a lot of energy; 5. Due to the unreasonable structure of the spinning die, for example, the upper end only presses the workpiece, and does not limit the workpiece in the circumferential direction. After spinning, the deformation of the aluminum alloy wheel blank seam is relatively large (the deformation is in the range of 0.3 to 1 mm), which affects the subsequent sequence. Machining accuracy, and because the spinning process needs to be carried out at high temperature, the aluminum alloy wheel blank processed by spinning is hot, and the gap between the center hole wall of the aluminum alloy wheel blank and the center positioning rod is small, according to the principle of thermal expansion and contraction , in the process of processing, when the tooling of the upper tail top moves upward, the center positioning rod of the upper tail top connecting column will often be lifted with the aluminum alloy wheel blank, which will affect the normal production and the improvement of efficiency

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