A kind of aluminum alloy wheel hub manufacturing method
A technology for an aluminum alloy wheel hub and a manufacturing method, which is applied in the field of auto parts, can solve the problems of sufficient grain growth, slow solidification speed, and subsequent surface processing, and achieves the effects of high quality, improved yield and production cost savings.
Active Publication Date: 2020-01-07
重庆中南铝合金轮毂有限公司
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Problems solved by technology
[0003] Most of the existing aluminum alloy wheel manufacturing enterprises use low-pressure casting to produce aluminum alloy wheels, but in the prior art, the aluminum alloy wheels produced by low-pressure casting will concentrate around the hottest bowl mouth and appear white spots. Most of them are dark white, because the casting near the center is thicker, the solidification speed is slow, and the crystal grains are fully grown. Therefore, the existing low-pressure casting process is used to produce aluminum alloy wheels. A large number of white spots will be produced, which will not only affect the tensile strength and service life of the hub, but also affect the surface appearance of the hub and subsequent surface processing
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[0019] The technical solutions of the present invention will be further described below through specific embodiments.
[0020] A method for manufacturing an aluminum alloy wheel hub, the low-pressure casting process it adopts comprises the following steps:
[0021] a) Melting the A356 aluminum alloy material to obtain liquid aluminum;
[0022] b) Adjust the temperature of the molten aluminum to 730-760°C, and add aluminum, titanium and boron for refinement;
[0023] c) The molten aluminum in step b) is taken out of the furnace and degassed with high-purity nitrogen, and then transferred to a low-pressure casting machine holding furnace to keep warm at 680-700°C;
[0024] d) Pressurize to make the aluminum liquid in step c) enter the liquid riser to raise the liquid and fill the mold cavity, and then carry out pressure maintenance. During the pressure maintenance, the temperature of the mold gate is controlled at 490-520 °C, and the small ring of the mold (that is, the PCD pos...
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Abstract
The invention relates to the field of an automobile part, in particular to an aluminum alloy wheel hub manufacturing method. A used low-pressure casting process comprises the following steps of a, smelting an aluminum alloy material to obtain aluminum liquid; b, regulating the temperature of the aluminum liquid to 730 to 760 DEG C; performing refining treatment; c, performing heat insulation on the aluminum liquid in the step b after the degassing; d, ascending the aluminum liquid; fully filling a mold die cavity with the aluminum liquid; then, performing pressure maintaining; e, opening a mold; taking a casting; performing solid solution treatment and incomplete artificial aging heat treatment. The manufacturing method has the advantages that aluminum alloy smelting aluminum liquid is firstly subjected to metamorphic improvement treatment; then, the temperature of the aluminum liquid and the mold is precisely controlled; finally, the casting is subjected to specific heat treatment process; the machining synchronously uses the cutter regulation; after the processing coating, an aluminum alloy wheel hub cannot generate the conditions of insufficient intensity and white spots, so that the produced aluminum alloy wheel hub has high quality; the finished product is greatly improved; the production cost is reduced.
Description
technical field [0001] The invention relates to the field of auto parts, in particular to a method for manufacturing an aluminum alloy wheel hub. Background technique [0002] With the development of society, automobiles have become an indispensable means of transportation for people to travel. As important accessories in automobiles, the quality of automobile wheels not only affects the appearance of automobiles, but also affects the safety of automobiles. Aluminum alloy wheels have been widely used in the field of automobile wheel manufacturing due to their light weight, high strength, good braking balance, high precision, good thermal conductivity, and low fuel consumption. [0003] Most of the existing aluminum alloy wheel manufacturing enterprises use low-pressure casting to produce aluminum alloy wheels, but in the prior art, aluminum alloy wheels produced by low-pressure casting will concentrate around the hottest bowl mouth and appear white spots. Most of them are d...
Claims
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IPC IPC(8): C22C1/02C22C1/06C22F1/043C22C21/02B22D18/04
CPCB22D18/04C22C1/026C22C1/06C22C21/02C22F1/043
Inventor 胡朝阳李玉寿斯庆伟
Owner 重庆中南铝合金轮毂有限公司