Automobile wheel hub machining method

Abstract

The invention provides an automobile wheel hub machining method. The automobile wheel hub machining method comprises the following steps of a smelting process, low-pressure casting, heat treatment, precision machining and surface coating. In the smelting process, silicon metal is added to aluminum liquid when the temperature of the aluminum liquid rises to 760DEG C, the silicon metal and the aluminum liquid are stirred for 25-30 minutes in an electromagnetic mode, wherein the content of the silicon metal is between 6.5% and 7.5%. When the aluminum liquid flows out of a furnace, AlSr alloy, AlTi5B alloy and magnesium are added to a flowing groove, wherein the content of Sr is between 0.008% and 0.012%, the content of Ti is between 0.1% and 0.2%, and the content of the magnesium is between 0.24% and 0.34%. In the low-pressure casting process, the aluminum liquid starts to flow out of the furnace under the temperature between 740DEG C to 750DEG C, refining and degassing are conducted on the aluminum liquid through high-purity nitrogen by 12 minutes, and then the aluminum liquid is conveyed to a low-pressure casting machine heat preserving furnace and is cast. In the heat treatment process, solid solution treatment, aging treatment and hardening treatment are conducted on a semifinished wheel hub formed after casting so as to obtain mechanical properties required by a wheel hub. The automobile wheel hub machining method can improve strength, hardness and forming of the wheel hub and meet requirements for safety performance of a wheel.

Description

technical field [0001] The invention relates to the field of auto parts processing, in particular to a processing method of an aluminum alloy auto wheel hub. Background technique [0002] The wheel hub is one of the important parts of the car, which directly affects the safety performance of the car, especially the aluminum alloy wheel hub, which has high requirements for strength, hardness and plasticity, so as to meet the safety performance requirements of the wheel. The processing accuracy of the wheel hub is high and the processing technology is complicated. Therefore, how to ensure the strength, hardness and plasticity of the wheel hub in the processing technology is a major problem that needs to be solved in wheel hub processing. [0003] In the manufacturing process of the wheel hub in the prior art, the process steps that the casting wheel hub needs to go through from the aluminum water to the finished product roughly include the following: aluminum alloy solution lo...

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Problems solved by technology

[0003] In the manufacturing process of the wheel hub in the prior art, the process steps that the casting wheel hub needs to go through from the aluminum water to the finished product roughly include the following: aluminum alloy solution low-pressure casting forming, forming a blank; heat treatment, solution quenching and aging; mechanical processing ; surface coating treatment; multiple steps such as performance and appearance testing to obtain the final product, the conventional feeding chain speed is 27 minutes / rack, the manufacturing time of aluminum alloy car wheels is long, the manufacturing cost is high, and the production efficiency is low

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