CN111013963A - Spring surface treatment process - Google Patents
Spring surface treatment process Download PDFInfo
- Publication number
- CN111013963A CN111013963A CN201811171453.5A CN201811171453A CN111013963A CN 111013963 A CN111013963 A CN 111013963A CN 201811171453 A CN201811171453 A CN 201811171453A CN 111013963 A CN111013963 A CN 111013963A
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- CN
- China
- Prior art keywords
- spring
- treatment process
- shot blasting
- surface treatment
- electrostatic
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/542—No clear coat specified the two layers being cured or baked together
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Springs (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a spring surface treatment process, which sequentially executes the following steps: shot blasting or shot blasting step: a phosphating treatment step; a drying step; electrostatic powder spraying; gluing; electrostatic flocking; and (5) curing. After the technical scheme is adopted, the corrosion resistance and the noise reduction performance of the spring are improved.
Description
Technical Field
The invention relates to a spring manufacturing technology, in particular to a surface treatment process of a spring.
Background
The trunk pressure spring is one of the main parts of the automatic opening device of the car trunk, and can play the role of automatically closing and opening the trunk. The suitcase pressure spring is usually made by winding about 3.5mm steel wire, the diameter is about 28mm, and the length is about 750 mm. Fig. 1 shows a schematic cross-sectional view of a conventional trunk compression spring 100.
The trunk pressure spring has higher requirements on the performances of corrosion resistance and noise reduction, and therefore, the conventional trunk pressure spring surface treatment process mostly adopts the processes of Dacromet flocking, electrophoresis flocking and the like, but the anti-corrosion effect and the noise reduction effect of the trunk pressure spring still have larger promotion space.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a spring surface treatment process which can improve the corrosion resistance and noise reduction performance of a spring.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a surface treatment process for a spring sequentially performs the following steps:
shot blasting or shot blasting step: performing surface shot blasting or surface shot blasting on the spring in a natural state;
and (3) phosphating treatment: soaking or spraying the spring subjected to shot blasting or shot blasting by using a phosphating solution;
and (3) drying: drying the spring after the phosphating treatment;
electrostatic powder spraying step: spraying the anti-corrosion powder on the surface of the dried spring by using electrostatic spraying equipment, and then curing;
gluing: applying glue to the surface of the spring after electrostatic powder spraying;
electrostatic flocking: implanting a layer of fluff on the surface of the glued spring through electrostatic flocking equipment;
and (5) curing.
The invention has at least the following advantages:
according to the spring surface treatment process disclosed by the embodiment of the invention, the anti-corrosion powder is sprayed on the surface of the spring through electrostatic powder spraying, so that the anti-corrosion performance of the surface of the spring is enhanced, the noise reduction performance and the abrasion resistance of a spring product are improved through electrostatic flocking, and the anti-corrosion performance of the spring product can be further improved after the glue solution is solidified.
Drawings
Fig. 1 is a schematic sectional view showing a compressed-air spring in a trunk of an automobile.
FIG. 2 shows a flow diagram of a spring surface treatment process according to an embodiment of the invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Please refer to fig. 2. According to the spring surface treatment process disclosed by the embodiment of the invention, the following steps are sequentially executed:
shot blasting or shot blasting step: performing surface shot blasting or surface shot blasting on the spring in a natural state;
and (3) phosphating treatment: soaking or spraying the spring subjected to shot blasting or shot blasting by using a phosphating solution;
and (3) drying: drying the spring after the phosphating treatment;
electrostatic powder spraying step: spraying the anti-corrosion powder on the surface of the dried spring by using electrostatic spraying equipment, and then curing;
gluing: applying glue to the surface of the spring after electrostatic powder spraying;
electrostatic flocking: implanting a layer of fluff on the surface of the glued spring through electrostatic flocking equipment;
and (5) curing.
Furthermore, in the spring surface treatment process, a whirl coating step is also arranged after the gluing step and before the electrostatic flocking step, and the whirl coating step is to whirl off redundant glue on the surface of the glued spring so as to form an even glue layer on the surface of the spring, thereby being beneficial to subsequent flocking, saving the glue consumption, reducing pollution and being more environment-friendly.
The characteristic properties of the present invention will be further described below with reference to specific embodiments of a surface treatment process for a compressed-air trunk spring of an automobile.
Shot blasting: and performing surface shot blasting treatment on the luggage case pressure spring in a natural state. The natural state referred to herein means an operating state in which the luggage compression spring is neither compressed nor stretched. The diameter of the adopted pill is 0.3-0.5 mm, the shot blasting strength is 0.3-0.4A (A represents ampere), and the shot blasting coverage rate is more than or equal to 90 percent. Alternatively, the pellet diameter is 0.4mm and shot strength is 0.3A.
And (3) phosphating treatment: and infiltrating or spraying the trunk compression spring subjected to shot blasting treatment by using phosphating solution, wherein the phosphating solution has the effect of forming a phosphating film on the surface of the trunk compression spring so as to be beneficial to spraying powder on the surface of the trunk compression spring. The total acid of the phosphating solution is 18-26 points, and the free acidity of the phosphating solution is 0.4-0.8 point.
And (3) drying: and (3) putting the suitcase pressure spring subjected to phosphating treatment into an oven for drying, wherein the temperature of the oven is 80-120 ℃, and the drying time is 15-25 min.
Electrostatic powder spraying step: and spraying epoxy powder onto the surface of the dried compressed spring of the trunk by using an electrostatic spray gun, wherein the thickness of the sprayed epoxy powder is 30-33 μm. Then putting the mixture into an oven for baking and curing, wherein the temperature of the oven is 190-200 ℃, and the drying time is 27-33 min.
Gluing: after the electrostatic powder spraying coating is solidified, the spring is immersed in the glue solution for 5-10 s when the spring is not completely cooled and the surface temperature is 80-100 ℃, and then the spring is taken out. In the step of gluing, the residual heat of the workpiece after electrostatic powder spraying is used for gluing, so that the waiting time after gluing is saved, and in addition, a hot dipping mode is adopted, so that the baking time after subsequent flocking is further shortened, the effect of saving energy consumption is achieved, and the density of flocking is higher than that of flocking at normal temperature.
Spin coating: and placing the luggage case pressure spring after gluing in a hollow barrel, wherein the rotating speed of the barrel is 600-800 r/min, and the time is 10-20 s, so as to get rid of the flowing redundant glue solution.
Electrostatic flocking: and hanging the glued trunk pressure spring in a flocking machine, adding flocking into the flocking machine, starting the flocking machine, and spraying the flocking from a spray nozzle under the action of a high-voltage electrostatic field to be adhered to the surface of the trunk pressure spring. The adopted fluff is nylon fiber (PA) or polyether fiber (PES), and the thickness of the implanted fluff is 0.3 mm-0.5 mm.
And (3) curing: and (3) placing the spring subjected to electrostatic flocking into an oven for baking and curing, wherein the temperature of the oven is 100-150 ℃, and the drying time is 8-12 min.
The thicknesses of the anti-corrosion powder coatings on the inner side and the outer side of the luggage case pressure spring manufactured by adopting the surface treatment process of the luggage case pressure spring are consistent, the flocking length and the density meet the requirements of abrasion resistance and noise reduction, a good anti-corrosion effect can be achieved through a neutral salt spray experiment for 840 hours, and the neutral salt spray experiment for 480 hours can be only guaranteed by adopting the existing surface treatment process (electrophoresis flocking, Dacromet flocking and the like).
Claims (10)
1. A surface treatment process for a spring is characterized by sequentially executing the following steps:
shot blasting or shot blasting step: performing surface shot blasting or surface shot blasting on the spring in a natural state;
and (3) phosphating treatment: soaking or spraying the spring subjected to shot blasting or shot blasting by using a phosphating solution;
and (3) drying: drying the spring after the phosphating treatment;
electrostatic powder spraying step: spraying the anti-corrosion powder on the surface of the dried spring by using electrostatic spraying equipment, and then curing;
gluing: applying glue to the surface of the spring after electrostatic powder spraying;
electrostatic flocking: implanting a layer of fluff on the surface of the glued spring through electrostatic flocking equipment;
and (5) curing.
2. The surface treatment process for the spring according to claim 1, further comprising a spin coating step after the sizing step and before the electrostatic flocking step, wherein the spin coating step is to spin off excess glue on the surface of the spring after the sizing step so as to form a uniform glue layer on the surface of the spring.
3. The surface treatment process of the spring according to claim 1, wherein the sizing step is to dip the spring after electrostatic powder spraying and solidification into the glue solution for 5s to 10s when the spring is not completely cooled and the surface temperature is 80 ℃ to 100 ℃, and then take out.
4. The spring surface treatment process of claim 1, wherein the diameter of the shot adopted in the shot blasting step is 0.3-0.5 mm, the shot blasting strength is 0.3-0.4A, and the shot blasting coverage is more than or equal to 90%.
5. The spring surface treatment process according to claim 1, wherein the drying step is to put the spring after the phosphating treatment into an oven for drying.
6. The surface treatment process for a spring according to claim 1, wherein in the electrostatic powder spraying step, the thickness of the sprayed anti-corrosion powder is 30 to 33 μm.
7. The spring surface treatment process according to claim 1, wherein in the step of electrostatic powder spraying, the spring sprayed with the anti-corrosion powder is placed into an oven for baking and curing, wherein the oven temperature is 190-200 ℃, and the baking time is 27-33 min.
8. The surface treatment process for a spring according to claim 1, wherein in the electrostatic flocking step, the adopted fluff is nylon fiber or polyether fiber, and the thickness of the implanted fluff is 0.3mm to 0.5 mm.
9. The spring surface treatment process according to claim 1, wherein the curing step is to put the spring after electrostatic flocking into an oven for baking and curing, the oven temperature is 100 ℃ to 150 ℃, and the baking time is as follows: 8-12 min.
10. The surface treatment process for a spring according to claim 1, wherein the spring is a compression spring for a trunk of an automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811171453.5A CN111013963A (en) | 2018-10-09 | 2018-10-09 | Spring surface treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811171453.5A CN111013963A (en) | 2018-10-09 | 2018-10-09 | Spring surface treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111013963A true CN111013963A (en) | 2020-04-17 |
Family
ID=70190666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811171453.5A Pending CN111013963A (en) | 2018-10-09 | 2018-10-09 | Spring surface treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111013963A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3935370A (en) * | 1972-09-06 | 1976-01-27 | Societe De La Viscose Suisse | Process for preparing flock fibers for electrostatic flocking |
| CN204564500U (en) * | 2015-02-15 | 2015-08-19 | 福州立洲弹簧有限公司 | A kind of flocking spring production line structure |
| CN107303549A (en) * | 2016-04-18 | 2017-10-31 | 无锡新大中薄板有限公司 | Manufacture method for the flocking aluminum-zinc alloy spraying decoration sheet material of ocean engineering |
| CN108348949A (en) * | 2015-11-09 | 2018-07-31 | 中央发条株式会社 | Flocking powder coating method |
-
2018
- 2018-10-09 CN CN201811171453.5A patent/CN111013963A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3935370A (en) * | 1972-09-06 | 1976-01-27 | Societe De La Viscose Suisse | Process for preparing flock fibers for electrostatic flocking |
| CN204564500U (en) * | 2015-02-15 | 2015-08-19 | 福州立洲弹簧有限公司 | A kind of flocking spring production line structure |
| CN108348949A (en) * | 2015-11-09 | 2018-07-31 | 中央发条株式会社 | Flocking powder coating method |
| CN107303549A (en) * | 2016-04-18 | 2017-10-31 | 无锡新大中薄板有限公司 | Manufacture method for the flocking aluminum-zinc alloy spraying decoration sheet material of ocean engineering |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200417 |
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| RJ01 | Rejection of invention patent application after publication |