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Hub surface pretreatment process

A treatment process and a technology for the surface of the wheel hub, which is applied in the direction of metal material coating process, etc., can solve the problems of short service life, easy peeling off of the coating layer, and increase the microscopic roughness of the wheel hub surface, so as to enhance corrosion resistance and increase microscopic roughness , Improve the effect of surface properties

Inactive Publication Date: 2018-11-23
ANHUI CHENGYOU AUTO PARTS MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned problems, the present invention proposes a hub surface pretreatment process, which can effectively improve the performance of the hub surface and significantly promote the degreasing effect of the hub surface; while enhancing the surface gloss and activity of the hub, it can also increase the microscopic roughness of the hub surface High degree, so that the hub surface can be combined with the subsequent paint spraying process, enhance the bonding force between the hub coating and the hub surface, enhance the corrosion resistance of the surface hub, and solve the problem that the coating layer is easy to fall off and the service life is short

Method used

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  • Hub surface pretreatment process

Examples

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Embodiment 1

[0021] A wheel hub surface pretreatment process, comprising the following steps:

[0022] (1) Hot water washing: put the hub in a washing tank, soak the hub in hot water at a temperature of 60°C for 15 minutes, and then use a brush to wipe off the aluminum chips and dust on the surface of the hub;

[0023] (2) Degreasing treatment: the wheel hub is placed in a washing tank, the wheel hub is soaked in the mixed solution of water, concentrated cleaning agent and surfactant, 2wt% potassium hydroxide solution, and ultrasonic treatment is carried out for 15min. The ultrasonic power is 500W. After the ultrasonic is over, take out the hub, and then spray the surface of the hub with the mixed liquid, repeat the spraying 2 to 3 times, and rinse the surface of the hub with hot water at a temperature of 50°C after the spraying is completed. , the flushing process is carried out according to the spray pressure of 0.1MPa and the flushing time of 1.2min, and the flushing is repeated several...

Embodiment 2

[0028] A wheel hub surface pretreatment process, comprising the following steps:

[0029] (1) Hot water washing: put the hub in a washing tank, soak the hub in hot water at a temperature of 65°C for 20 minutes, and then use a brush to wipe off the aluminum chips and dust on the surface of the hub;

[0030] (2) Degreasing treatment: place the wheel hub in a washing tank, soak the wheel hub in a mixture of water, concentrated cleaning agent, surfactant, and 1 wt% potassium hydroxide solution, and perform ultrasonic treatment for 20 min. The ultrasonic power is 600W. After the ultrasonic is finished, take out the hub, and then spray the surface of the hub with the mixed solution. Repeat the spraying for 2 to 3 times. After the spraying is over, rinse the surface of the hub with hot water at a temperature of 45°C. , the flushing process is carried out according to the spray pressure of 0.2MPa and the flushing time of 1min, and the flushing is repeated several times to wash off the...

Embodiment 3

[0035] A wheel hub surface pretreatment process, comprising the following steps:

[0036] (1) Hot water washing: put the wheel hub in a washing tank, soak the wheel hub with hot water at a temperature of 70°C, soak for 10 minutes, and then use a brush to wipe off the aluminum chips and dust on the surface of the wheel hub;

[0037] (2) Degreasing treatment: place the wheel hub in a washing tank, soak the wheel hub in a mixture of water, concentrated cleaning agent and surfactant, and 1.5 wt% potassium hydroxide solution, and perform ultrasonic treatment for 12 minutes , the ultrasonic power is 450W. After the ultrasonic wave is over, take out the hub, and then spray the surface of the hub with the mixed solution. Repeat the spraying for 2 to 3 times. Washing, the washing process is carried out according to the spray pressure of 0.2MPa and the washing time of 1.5min. Repeat the washing for many times to wash away the residual mixed solution on the surface of the hub;

[0038] ...

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Abstract

The invention discloses a hub surface pretreatment process. The hub surface pretreatment process comprises the following steps of hot water washing, grease removal treatment, acid pickling treatment,chromium-free passivation treatment and pure water washing. According to the surface pretreatment process, the surface performance of a hub can be effectively improved, the degreasing effect on the surface of the hub is remarkably promoted, the surface glossiness and the activity of the hub are enhanced, and meanwhile the surface microscopic roughness of the hub is increased; and the surface of the hub can be combined with the process of the subsequent spraying coating, the bonding force between the hub coating and the hub surface is enhanced, the corrosion resistance of the surface hub is enhanced, and the problems that the coating layer does not easily fall off and the service life is short can be solved.

Description

technical field [0001] The invention relates to the field of surface treatment, in particular to a hub surface pretreatment process. Background technique [0002] In the past, most car wheel bearings used single-row tapered roller or ball bearings in pairs. With the development of technology, car hub units have been widely used in cars, and the range and amount of use of hub bearing units are increasing day by day. After the hub turning process is completed, it is necessary to remove the emulsion, oil, aluminum chips and others that are stuck on the surface of the hub workpiece. Impurities, etc. are cleaned, and the surface of the wheel hub is also treated to make it more firmly bonded with the coating. However, the performance obtained by the existing method for the surface treatment of the wheel hub cannot meet the needs of the existing wheel hub. However, the existing technology The surface of the automobile wheel hub is not smooth enough, the corrosion resistance is poo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/12C23G1/22C23C22/78
CPCC23C22/78C23G1/125C23G1/22
Inventor 倪大权马凯凯郑志军倪大林
Owner ANHUI CHENGYOU AUTO PARTS MFG
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