CN105986278A - Bolt pickling process - Google Patents
Bolt pickling process Download PDFInfo
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- CN105986278A CN105986278A CN201510048678.1A CN201510048678A CN105986278A CN 105986278 A CN105986278 A CN 105986278A CN 201510048678 A CN201510048678 A CN 201510048678A CN 105986278 A CN105986278 A CN 105986278A
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- Prior art keywords
- skin film
- metallic soap
- processing
- pickling
- wire rods
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a bolt pickling process. The bolt pickling process comprises the following steps: 1) conducting acid pickling, soaking all wire rods into three hydrochloric acid tanks with the concentration ranging from 20% to 25% at normal temperature for several minutes, removing an oxidation film on the surfaces of the wire rods, 2) clear water cleaning: removing the hydrochloric acid corrosion products on the surfaces of the wire rods; 3) oxalic acid processing: increasing the metal activity for compacting a skin film generated at a next process; 4) skin film processing: soaking the wire rods into phosphate to enable steel surfaces to make contact with conversion treatment fluid, wherein steel is dissolved to generate insoluble compounds, the compounds are attached to the steel surfaces to form a skin film, 5) clean water cleaning: removing the residue on the surface of the skin film; and 6) lubricating fluid immersing: wherein the friction coefficient of the phosphatic skin film is not low, full lubricity during processing cannot be endowed, a hard metallic soap layer is formed by a reaction of the phosphatic skin film and metallic soap, and the lubricity is increased, and the metallic soap layer can be immersed into the lubricating fluid. According to the invention, an acid pickling flow is simplified, productivity is increased, several repetitive processes can be avoided, work efficiency is increased, design regular tendency for long term can be overcome, the novel designing and processing thinking can be provided, and the processing effect is better than that of the prior art.
Description
Technical field
The present invention relates to the acid cleaning process of a kind of screw.
Background technology
Screw is a kind of very conventional mechanical part, one pickling process is had in screw production process, the pickle of acid cleaning process is generally the mixture of multiple acid, the method utilizing acid solution to remove the oxide skin on steel surface and corrosion thing is referred to as pickling, it is a kind of method of cleaning metal surface, generally carries out together with pre-film.In the manufacturing of screw, current acid cleaning process flow process is complicated, causes productivity underground.
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide the acid cleaning process of a kind of screw, and this acid cleaning process can simplify pickling process, increases productivity.
For achieving the above object, the invention provides the acid cleaning process of a kind of screw, comprise the steps, 1) pickling: whole dish unit is immersed room temperature respectively, concentration is three hydrochloric acid trough several minutes of 20-25%, its objective is to remove the oxide-film of wire surface；
2) clean water: remove the hcl corrosion product of wire surface；
3) oxalic acid treatment: increase the activity of metal, so that the epithelium that subsequent processing generates is the finest and close；
4) epithelium processes: dish unit is immersed phosphate, and steel surface contacts with chemical synthesis treatment liquid, and iron and steel dissolves and generates insoluble compound, is attached to steel surface and forms epithelium；
5) clean water: remove epithelial surfaces residue；
6) lubricating fluid immerses: owing to the coefficient of friction of phosphate coating is not the lowest, it is impossible to imparting adds sufficient lubricity in man-hour but reacts with metallic soap and form hard metallic soap layer, can increase its greasy property and be dipped in lubricating fluid.
The invention has the beneficial effects as follows: this invention simplifies pickling process, increase productivity, eliminate a lot of repeatability operation, improve work efficiency, overcome design set for a long time, it is provided that a kind of new design and processing thought, and achieve more more preferable processing effect than prior art.
Detailed description of the invention
Technical scheme disclosed by the invention is the acid cleaning process of a kind of screw, comprises the steps, 1) pickling: whole dish unit is immersed room temperature respectively, concentration is three hydrochloric acid trough several minutes of 20-25%, its objective is to remove the oxide-film of wire surface；
2) clean water: remove the hcl corrosion product of wire surface；
3) oxalic acid treatment: increase the activity of metal, so that the epithelium that subsequent processing generates is the finest and close；
4) epithelium processes: dish unit is immersed phosphate, and steel surface contacts with chemical synthesis treatment liquid, and iron and steel dissolves and generates insoluble compound, is attached to steel surface and forms epithelium；
5) clean water: remove epithelial surfaces residue；
6) lubricating fluid immerses: owing to the coefficient of friction of phosphate coating is not the lowest, it is impossible to imparting adds sufficient lubricity in man-hour but reacts with metallic soap and form hard metallic soap layer, can increase its greasy property and be dipped in lubricating fluid.
This invention simplifies pickling process, increase productivity, eliminate a lot of repeatability operation, improve work efficiency, overcome design set for a long time, it is provided that a kind of new design and processing thought, and achieve more more preferable processing effect than prior art.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.Therefore, all technical staff in the art, all should be in the protection domain being defined in the patent claims the most on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (1)
1. the acid cleaning process of a screw, it is characterised in that comprise the steps, 1) pickling: whole dish unit is immersed room temperature respectively, concentration is three hydrochloric acid trough several minutes of 20-25%, its objective is to remove the oxide-film of wire surface；
2) clean water: remove the hcl corrosion product of wire surface；
3) oxalic acid treatment: increase the activity of metal, so that the epithelium that subsequent processing generates is the finest and close；
4) epithelium processes: dish unit is immersed phosphate, and steel surface contacts with chemical synthesis treatment liquid, and iron and steel dissolves and generates insoluble compound, is attached to steel surface and forms epithelium；
5) clean water: remove epithelial surfaces residue；
6) lubricating fluid immerses: owing to the coefficient of friction of phosphate coating is not the lowest, it is impossible to imparting adds sufficient lubricity in man-hour but reacts with metallic soap and form hard metallic soap layer, can increase its greasy property and be dipped in lubricating fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510048678.1A CN105986278A (en) | 2015-01-30 | 2015-01-30 | Bolt pickling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510048678.1A CN105986278A (en) | 2015-01-30 | 2015-01-30 | Bolt pickling process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105986278A true CN105986278A (en) | 2016-10-05 |
Family
ID=57035281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510048678.1A Pending CN105986278A (en) | 2015-01-30 | 2015-01-30 | Bolt pickling process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105986278A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110144577A (en) * | 2019-06-24 | 2019-08-20 | 浙江日星标准件有限公司 | A kind of medium carbon alloy steel bolt metal non-phosphate film processing method |
-
2015
- 2015-01-30 CN CN201510048678.1A patent/CN105986278A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110144577A (en) * | 2019-06-24 | 2019-08-20 | 浙江日星标准件有限公司 | A kind of medium carbon alloy steel bolt metal non-phosphate film processing method |
| CN110144577B (en) * | 2019-06-24 | 2021-06-11 | 浙江日星标准件有限公司 | Medium carbon alloy steel bolt metal phosphorus-free leather film treatment method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161005 |
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| WD01 | Invention patent application deemed withdrawn after publication |