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Frosted painting method for surfaces of automobile aluminum alloy hubs

An aluminum alloy wheel hub and coating method technology, which is applied in the direction of metal material coating process, furnace type, furnace, etc., can solve the problems of destroying the grinding effect of the workpiece surface, uneven surface of the workpiece, and high rejection rate, and achieves good grinding effect. The effect of smooth processing surface and high qualified product rate

Inactive Publication Date: 2018-12-25
KINGHWA TOPTRUE WHEEL
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AI Technical Summary

Problems solved by technology

[0002] In the manufacture of aluminum alloy wheels for automobiles, for the sake of appearance, sometimes the surface needs to be painted with different effects. Frosting is a kind of appearance effect that is widely used. In order to achieve this frosting effect, the current method is: first After casting, heat treatment and shot blasting, machining, deburring, pretreatment, painting and drying are carried out in sequence. When using this process, there are the following disadvantages: 1. Due to the workpiece after casting and heat treatment, its surface There are defects such as bruising, shrinkage, scale, and uneven surface of the workpiece caused by the paint on the casting mold. In order to eliminate these defects, a large number of manual grinding processes are required. It is still difficult to ensure the consistency of the surface of the workpiece, and these defec

Method used

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Embodiment Construction

[0014] The present invention is a method for frosted coating on the surface of an automobile aluminum alloy wheel hub, which is characterized in that it comprises the following process steps:

[0015] a. Casting: The workpiece is poured out of the hot casting mold on the casting machine;

[0016] b. Heat treatment: First, carry out solid solution treatment on the workpiece in a roller continuous heat treatment furnace. The furnace temperature is between 535±5°C and the solution treatment time is 300 minutes. Then, take out the workpiece from the furnace and send it to the quenching tank The quenching treatment is carried out in the quenching tank. The water temperature in the quenching tank is between 60 and 80°C, and the quenching time is 2 minutes. After quenching, the workpiece is sent to the roller continuous heat treatment furnace for artificial aging treatment. Allow it to cool down naturally after 150 minutes at the furnace temperature;

[0017] c. Machining: Turnin...

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Abstract

The invention discloses a frosted painting method for surfaces of automobile aluminum alloy hubs. The method is characterized by comprising the following technological steps of sequentially performingcasting, performing heat treatment, performing mechanical processing and performing burring, and then sequentially performing shot blasting processing, performing pretreatment, performing paint spraying and performing baking. The method disclosed by the invention is reasonable in technology, the processed surfaces are level, the painting quality is excellent, and the rate of qualified products ishigh.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a frosted coating method for the surface of an automobile aluminum alloy wheel hub. Background technique [0002] In the manufacture of aluminum alloy wheels for automobiles, for the sake of appearance, sometimes the surface needs to be painted with different effects. Frosting is a kind of appearance effect that is widely used. In order to achieve this frosting effect, the current method is: first After casting, heat treatment and shot blasting, machining, deburring, pretreatment, painting and drying are carried out in sequence. When using this process, there are the following disadvantages: 1. Due to the workpiece after casting and heat treatment, its surface There are defects such as bruising, shrinkage, scale, and uneven surface of the workpiece caused by the paint on the casting mold. In order to eliminate these defects, a large number of manual grinding processes are required. It ...

Claims

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Application Information

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IPC IPC(8): B23P15/00C21D9/34C21D1/18C23G1/22C23G1/12C23G1/24C23C22/06
CPCB23P15/00C21D1/18C21D9/34C23C22/06C23G1/125C23G1/22C23G1/24
Inventor 石良
Owner KINGHWA TOPTRUE WHEEL
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