A surface treatment process for mechanical parts

A technology for mechanical parts and surface treatment, applied in the coating process of metal materials, etc., can solve the problems of high production cost, long time of high-temperature pickling, high volatility of toxic acid, etc., achieve high production efficiency and improve surface corrosion resistance Performance, the effect of short polishing time

Active Publication Date: 2019-02-19
安庆市芊芊科技包装股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the traditional mechanical polishing process is still widely used in the polishing of parts. This polishing process is usually high-temperature pickling after degreasing. The pickling solution often contains chromic acid, hydrofluoric acid, nitric acid and other toxic substances. The main function of pickling solution is to remove scale and improve the smoothness of metal products, but the high-temperature pickling takes a long time, which not only makes the production cost high, but also the toxic acid contained in it is highly volatile, which is very easy to pollute the environment and corrode equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A surface treatment process for mechanical parts, comprising the following steps:

[0042] 1) Parts degreasing

[0043] Use a degreasing agent or acetone to scrub with a brush or a scouring pad to remove local heavy oil stains on the surface of the parts;

[0044] 2) Parts washing

[0045] Use a high-pressure water gun tank to rinse the surface of the parts twice with pure water, and use high-temperature pure water for parts with heavy oil pollution at a temperature of 40 °C;

[0046] 3) Surface polishing

[0047] Put the parts and the medium into the drum of the planetary tumbling machine for tumbling. The mass ratio of the medium is 15% kerosene, 25% polishing agent, 50% steel shot, and 10% water, and the tumbling time is 30 minutes;

[0048] 4) chemical polishing

[0049] Use chemicals for rough polishing and fine polishing respectively, the chemical agent is a mixture of nitric acid and nitric acid, and the time is 5 minutes;

[0050] 5) Electrolyte plasma poli...

Embodiment 2

[0062] A surface treatment process for mechanical parts, comprising the following steps:

[0063] 1) Parts degreasing

[0064] Use a degreasing agent or acetone to scrub with a brush or a scouring pad to remove local heavy oil stains on the surface of the parts;

[0065] 2) Parts washing

[0066] Use a high-pressure water gun tank to rinse the surface of the parts twice with pure water, and use high-temperature pure water for parts with heavy oil pollution at a temperature of 68°C;

[0067] 3) Surface polishing

[0068] Put the parts and the medium into the planetary tumbling machine drum for tumbling, the mass ratio of the medium is 20% kerosene, 30% polishing agent, 40% steel shot, 10% water, and the tumbling time is 50 minutes;

[0069] 4) chemical polishing

[0070] Use chemicals for rough polishing and fine polishing respectively, the chemical agent is a mixture of nitric acid and nitric acid, and the time is 10 minutes;

[0071] 5) Electrolyte plasma polishing

[0...

Embodiment 3

[0083] A surface treatment process for mechanical parts, comprising the following steps:

[0084] 1) Parts degreasing

[0085] Use a degreasing agent or acetone to scrub with a brush or a scouring pad to remove local heavy oil stains on the surface of the parts;

[0086] 2) Parts washing

[0087] Use a high-pressure water gun tank to rinse the surface of the parts twice with pure water, and use high-temperature pure water for parts with heavy oil pollution at a temperature of 54 °C;

[0088] 3) Surface polishing

[0089] Put the parts and media into the drum of the planetary tumbling machine for tumbling, the mass ratio of the medium is 18% kerosene, 28% polishing agent, 44% steel shot, 10% water, and the tumbling time is 40 minutes;

[0090] 4) chemical polishing

[0091] Use chemicals for rough polishing and fine polishing respectively, the chemical agent is a mixture of nitric acid and nitric acid, and the time is 8 minutes;

[0092] 5) Electrolyte plasma polishing

...

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PUM

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Abstract

The invention discloses a mechanical part surface treatment technology. The mechanical part surface treatment technology comprises the following steps: oil removal of parts, washing of the parts, surface polishing, chemical polishing, electrolyte plasma polishing, pickling and surface cleaning. Polishing is carried out in a composite polishing mode, gloss of an electrolytic polished surface can be equal to that of a mirror, common surface roughness Ra can reach 0.1-0.5 <mu> m, and the maximum surface roughness Ra can reach 0.05 <mu> m; a passivating film can be generated on a chemical polished surface, and the corrosion resistance of the surface can be improved; a deteriorative layer cannot be generated on the polished surface, additional stress does not exist, the original stress layer can be removed or reduced, and a stripping layer is not generated.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a surface treatment process for mechanical parts. Background technique [0002] At present, some parts of domestic precision instruments have high requirements on surface quality, but the relevant domestic production standards are not enough, which leads to the need to import them from abroad, occupying most of the domestic market. After years of market research and production process research and development exploration. Some special technical requirements of parts, the manufacturing technology in the domestic market is difficult to meet. [0003] Many mechanical parts are mostly processed by high-temperature processing such as hot rolling, forging, heat treatment, and welding. During the processing, thick oxide scales will appear on the surface. Film, black slag, etc. are mostly left on the surface of metal products. For this reason, parts must be polished after processin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F17/00C23F3/00C25F3/16C23C22/48
CPCC23C22/48C23F3/00C23F17/00C25F3/16
Inventor 黄备胜
Owner 安庆市芊芊科技包装股份有限公司
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