CN115739553B - Aircraft coating method based on paint mist particle sedimentation control - Google Patents
Aircraft coating method based on paint mist particle sedimentation control Download PDFInfo
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- CN115739553B CN115739553B CN202211469729.4A CN202211469729A CN115739553B CN 115739553 B CN115739553 B CN 115739553B CN 202211469729 A CN202211469729 A CN 202211469729A CN 115739553 B CN115739553 B CN 115739553B
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- aircraft
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- paint
- spray gun
- chamber
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- 239000003973 paint Substances 0.000 title claims abstract description 122
- 239000003595 mist Substances 0.000 title claims abstract description 70
- 239000002245 particle Substances 0.000 title claims abstract description 61
- 238000000576 coating method Methods 0.000 title claims abstract description 39
- 238000004062 sedimentation Methods 0.000 title claims abstract description 9
- 239000007921 spray Substances 0.000 claims abstract description 117
- 238000005507 spraying Methods 0.000 claims abstract description 50
- 239000011248 coating agent Substances 0.000 claims abstract description 27
- 230000005484 gravity Effects 0.000 claims abstract description 10
- 230000009471 action Effects 0.000 claims abstract description 8
- 239000007888 film coating Substances 0.000 claims description 18
- 238000009501 film coating Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 9
- 230000001788 irregular Effects 0.000 abstract description 5
- 239000006185 dispersion Substances 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Abstract
The invention discloses an aircraft coating method based on paint mist particle sedimentation control, which comprises the following steps: 1) Placing the aircraft in a paint spray booth; 2) The air flow flows to the interior of the paint spray booth, and the air flow direction in the paint spray booth is kept consistent with the heading of the aircraft; 3) A spray gun is used at the inner side of the spray booth, and the spray gun is over against the upper surface, the lower surface and the side surface of the aircraft to spray paint mist particles; 4) The spray gun reciprocates back and forth along the axis direction of the airplane at the top of the spray booth; 5) According to the movement direction of the spray gun, the spraying speed of the spray gun and the gas flow rate in the spray chamber are adjusted, so that paint mist particles sprayed out of the spray gun form a flat and uniform coating on the surface of the aircraft under the action of gravity and air flow in the spray chamber. The invention not only can effectively reduce the rough coating and the light loss fault caused by irregular dispersion of paint mist in the spraying process of the aircraft, but also can lead the coating to be more uniform and flat on the basis of the conventional spraying process, and further improves the control precision of the film thickness and uniformity of the aircraft coating.
Description
Technical Field
The invention relates to the technical field of aircraft surface coating processes, in particular to an aircraft coating method based on paint mist particle sedimentation control.
Background
At present, a known method for reducing the influence of paint mist spraying on the thickness uniformity of a coating mainly comprises the steps of taking scattered paint mist particles out of a spraying area through air flow in a paint spraying chamber and attaching the paint mist particles outside the spraying area, so that the thickness and the appearance quality of the coating are controlled, and the uniformity of the coating is improved. However, in many conventional coating methods, in the construction process of oversized workpieces such as aircrafts, it is difficult to completely remove paint mist inside a paint spray booth, and the paint mist is placed in a non-spraying area, so that residual paint mist is deposited in the spraying area, contaminates the sprayed area and the area to be sprayed, and makes difficulty in controlling the thickness and appearance quality of a coating on the outer surface of the aircrafts, and coating thickness out-of-tolerance and light loss faults are extremely easy to occur.
Disclosure of Invention
The invention aims to provide an aircraft coating method based on paint mist particle sedimentation control, which not only can effectively reduce the coating light loss fault caused by irregular dispersion of paint mist, but also is beneficial to improving the thickness uniformity of the coating.
The invention is realized by the following technical scheme: an aircraft coating method based on paint mist particle sedimentation control comprises the following steps:
(1) Placing the aircraft in a paint spraying chamber, wherein the interior of the paint spraying chamber is closed, and the front end and the rear end of the paint spraying chamber are ventilated;
(2) The air flow flows to the interior of the paint spray booth, and the air flow direction in the paint spray booth is kept consistent with the heading of the aircraft;
(3) A spray gun is used inside the spray booth, and the spray gun is directly opposite to the upper surface, the lower surface and the side surface of the aircraft to spray paint mist particles;
(4) The spray gun reciprocates back and forth along the axis direction of the airplane at the top of the spray booth, and the airflow velocity in the spray booth is in direct proportion to the spraying speed of the spray gun;
(5) According to the movement direction of the spray gun, the spraying speed of the spray gun and the gas flow rate in the spray chamber are adjusted, so that paint mist particles sprayed out of the spray gun form a flat and uniform coating on the surface of the aircraft under the action of gravity and air flow in the spray chamber.
The working principle of the technical scheme is that the air flow direction of the paint spray chamber is kept consistent with the heading of an airplane, so that the wind resistance and turbulence of the air flow in the paint spray chamber can be reduced, the air supply and exhaust efficiency is improved, and meanwhile, the directional drifting of paint mist particles can be realized. The paint mist particles are affected by gravity factors to move downwards, the spraying speed and the airflow speed of the paint spray booth are controlled to change the drifting direction and the sedimentation distance of the paint mist particles, so that the paint mist particles can accurately and quantitatively sediment to a spraying area and are fused with a wet film coating, and the thickness uniformity of the coating is accurately controlled.
In order to better implement the method of the present invention, in the step (1), the aircraft is further disposed in the paint spray booth with its nose facing the front end of the paint spray booth and its tail facing the rear end of the paint spray booth.
In order to better implement the method of the present invention, in the step (2), the front end of the paint spray booth is an air supply port, the rear end of the paint spray booth is an air exhaust port, and the air flow direction is from the aircraft nose to the aircraft tail.
In order to better realize the method of the invention, in the step (5), when the spray gun sprays from the machine head to the machine tail, the gas flow rate in the spray chamber is 300m/s-500m/s, and the spraying speed of the spray gun is 600mm/s-1000mm/s.
When the aircraft is sprayed along the course of the aircraft from the aircraft nose to the aircraft tail, air is supplied from the front part of the aircraft nose, air is exhausted from the rear part of the aircraft tail, and the air flow direction is from the aircraft nose to the aircraft tail. Paint mist particles atomized by the spray gun can directionally fly towards the tail direction of the aircraft under the action of air flow, and then sink to a subsequent area to be sprayed under the influence of gravity factors, so that the pollution to the sprayed area caused by irregular dispersion of paint mist is avoided. Along with the continuous volatilization of the solvent in the coating, the surface tension of the scattered paint mist particles is gradually increased, when the paint mist particles are settled until the surface tension of a subsequent area to be sprayed is changed to be large enough, the settled paint mist particles are difficult to wet by a wet film formed by spraying, and the phenomenon of surface roughness to be sprayed is easy to occur. In order to overcome the problem, the drift distance of paint mist particles and the volatilization time in the air can be shortened by reducing the airflow speed of a paint spray booth and improving the spraying speed, the time for covering the paint mist particles by a wet film is controlled within a certain range, the paint mist particles can be fused with a wet film coating sprayed subsequently before being completely dried, and the leveling and uniformity of the film thickness of the coating can be realized by the flow characteristic of liquid.
In order to better realize the method of the invention, in the step (5), when the spray gun sprays from the tail to the head, the gas flow rate in the spray chamber is 300m/s-500m/s, and the spraying speed of the spray gun is 345mm/s-590mm/s.
When the aircraft is sprayed from the tail to the aircraft nose along the aircraft course, air is supplied from the front part of the aircraft nose, air is exhausted from the rear part of the aircraft tail, and the air flow direction is from the aircraft nose to the aircraft tail. Paint mist particles atomized by the spray gun can directionally drift towards the tail direction of the aircraft under the action of air flow, and then sink to a sprayed area in the front under the influence of gravity factors, so that the pollution to the area to be sprayed caused by irregular drift of paint mist is avoided. Similarly, as the solvent in the paint is volatilized continuously, the surface tension of the wet film coating is gradually increased, and meanwhile, the surface tension of scattered paint mist particles is also increased, but the surface tension of the paint mist particles is increased at a much faster speed than that of the wet film coating. When the surface tension of the wet film coating changes sufficiently, paint mist particles deposited on the film layer are difficult to wet and finally adhere to the surface of the coating to form convex particles, so that the light loss fault of the surface of the coating is easily caused. In order to overcome the problem, the drift distance of paint mist particles and the volatilization time in the air can be shortened by reducing the airflow speed of a paint spray room and the spraying speed, the time of the paint mist particles falling on a wet film is controlled within a certain range, the pre-formed wet film coating can be fused with the settled paint mist particles before being completely dried, and the leveling and uniformity of the film thickness of the coating can be realized by the flow characteristic of liquid.
To better carry out the method of the invention, the aircraft surface is further uniformly coated with a wet film coating.
In order to better realize the method of the invention, further, the fusion time of paint mist particles sprayed by the spray gun and the wet film coating of the surface of the airplane is not more than 0.5s.
Compared with the prior art, the invention has the following advantages:
(1) According to the invention, the airflow direction of the paint spray chamber is kept consistent with the aircraft heading, so that the wind resistance and turbulence of the airflow in the paint spray chamber can be reduced, the air supply and exhaust efficiency is improved, and the directional drifting of paint mist particles can be realized;
(2) According to the invention, by utilizing the characteristic that paint mist particles are affected by gravity factors to move downwards, the paint mist particles can be accurately and quantitatively settled to a spraying area by operating along the airflow direction of a paint spray chamber and controlling the spraying speed and the airflow speed of the paint spray chamber so as to change the drifting direction and the settling distance of the paint mist particles, and the paint mist particles are fused with a wet film coating, so that the accurate control of the thickness uniformity of the coating is realized;
(3) According to the aircraft coating method, in the construction process of oversized workpieces such as aircraft, the coarse coating and the light loss fault caused by irregular dispersion of paint mist in the aircraft spraying process can be effectively reduced, the coating can be more uniform and smooth on the basis of a conventional spraying process, the film thickness and uniformity control precision of the aircraft coating are further improved, and in addition, the residual paint mist can be prevented from settling in a spraying area and polluting a sprayed area and an area to be sprayed.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of the working principle of the present invention;
FIG. 2 is a schematic view of the spray gun of the present invention from the nose to the tail;
FIG. 3 is a schematic view of the spray gun of the present invention from the tail to the head.
Wherein: 1-air supply opening, 2-air outlet, 3-air flow direction, 4-aircraft course, 5-directional drifting area, 6-spray booth, 7-spray gun, 8-machine body surface, 9-sprayed area, 10-area to be sprayed, 11-drifting paint mist particles, 12-settled paint mist particles and 13-wet film coating.
Detailed Description
In order to make the objects, process conditions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following examples, but the embodiments of the present invention are not limited thereto, and various substitutions and modifications according to the general knowledge and conventional means of the art without departing from the technical spirit of the present invention, should be included in the scope of the present invention, and the specific examples described herein are only for explaining the present invention and are not limited thereto.
Example 1:
the embodiment provides an aircraft coating method based on paint mist particle sedimentation control, which comprises the following steps:
(1) Placing the aircraft in a paint spraying chamber, wherein the interior of the paint spraying chamber is closed, and the front end and the rear end of the paint spraying chamber are ventilated;
(2) The air flow flows to the interior of the paint spray booth, and the air flow direction in the paint spray booth is kept consistent with the heading of the aircraft;
(3) A spray gun is used inside the spray booth, and the spray gun is directly opposite to the upper surface, the lower surface and the side surface of the aircraft to spray paint mist particles;
(4) The spray gun reciprocates back and forth along the axis direction of the airplane at the top of the spray booth, and the airflow velocity in the spray booth is in direct proportion to the spraying speed of the spray gun;
(5) According to the movement direction of the spray gun, the spraying speed of the spray gun and the gas flow rate in the spray chamber are adjusted, so that paint mist particles sprayed out of the spray gun form a flat and uniform coating on the surface of the aircraft under the action of gravity and air flow in the spray chamber.
In fig. 1, when the surface of the aircraft is sprayed, air is supplied 1 from the front part of the aircraft nose, air is exhausted 2 from the rear part of the aircraft tail, and the air flow direction 3 is from the aircraft nose to the aircraft tail, so that the air flow direction 3 of the paint spray booth 6 is consistent with the aircraft heading 4. The spraying speed and the air flow speed of the paint spray booth are controlled to shorten the drifting distance of paint mist particles and the volatilizing time in the air by operating along the air flow direction 3 of the paint spray booth, so that the paint mist particles can be directionally scattered 5 to be settled to a spraying area and fused with a wet film coating, and the accurate control of the thickness uniformity of the coating is realized.
Example 2:
this embodiment is directed to the process of spraying the spray gun from the head to the tail, and as shown in fig. 2, when spraying from the head to the tail, the spray gun 7 moves from front to back, and the air flow direction 3 is from the head to the tail. The spray gun 7 atomizes the paint to form paint mist particles, part of the paint mist particles are adhered to the surface 8 of the sprayed object, a continuous paint film coating is formed in the sprayed area 9, and part of the paint mist particles are carried away in the air by airflow and directionally float and settle towards the direction of the subsequent area 10 to be sprayed. In order to enable the paint mist particles and the wet film coating to be mutually fused, the air flow speed and the spraying speed in the paint spray booth 6 are in a proportional relation. When the air flow speed of the paint spray booth 6 is in the range of 300-500 m/S, the spraying speed is preferably 600-1000 mm/S, so that the scattered paint mist particles 11 can be uniformly settled to the area to be sprayed 10, the wet film coating 13 and the settled paint mist particles 12 can be covered and fused within 0.5S, and finally, the paint spray booth is leveled under the action of gravity to form a flat and uniform coating. Other portions of the present embodiment are the same as those of the above embodiment, and will not be described again.
Example 3:
this embodiment is directed to the process of spraying the spray gun from the tail to the head, and as shown in fig. 3, when spraying from the tail to the head, the spray gun 7 moves from back to front, and the air flow direction 3 from the head to the tail. The spray gun 7 atomizes the paint to form paint mist particles, part of the paint mist particles are adhered to the surface 8 of the sprayed object, a continuous paint film coating is formed in the sprayed area 9, and part of the paint mist particles are carried away in the air by airflow and directionally float and settle in the direction of the front sprayed area 9. In order to allow the floating and settling paint mist particles to merge with the wet film coating 13, the spray booth air flow rate and the spray rate should be maintained in a proportional relationship and the spray rate should be reduced. When the air flow speed of the paint spray booth 6 is in the range of 300-500 m/S, the spraying speed is preferably 354-590 mm/S, so that the scattered paint mist particles 11 can be uniformly settled to the sprayed area 9, the scattered paint mist particles 11 can be completely fused into the wet film 13 within 0.5S, and finally, the paint spray booth can be leveled under the action of gravity to form a flat and uniform coating. Other portions of the present embodiment are the same as those of the above embodiment, and will not be described again.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (2)
1. An aircraft coating method based on paint mist particle sedimentation control is characterized by comprising the following steps:
(1) Placing the aircraft in a paint spraying chamber, wherein the interior of the paint spraying chamber is sealed, the front end and the rear end of the paint spraying chamber are ventilated, the aircraft head of the aircraft placed in the paint spraying chamber faces the front end of the paint spraying chamber, and the aircraft tail faces the rear end of the paint spraying chamber;
(2) The air flow flows into the paint spray chamber, the air flow direction in the paint spray chamber is consistent with the heading of the aircraft, the front end of the paint spray chamber is an air supply outlet, the rear end of the paint spray chamber is an air outlet, and the air flow direction is from the aircraft nose to the aircraft tail;
(3) A spray gun is used inside the spray booth, and the spray gun faces the upper surface, the lower surface and the side face of the aircraft to spray to generate paint mist particles;
(4) The spray gun reciprocates back and forth along the axis direction of the airplane at the top of the spray booth, and the airflow velocity in the spray booth is in direct proportion to the spraying speed of the spray gun;
(5) According to the movement direction of the spray gun, the spraying speed of the spray gun and the gas flow rate in the spray chamber are adjusted, so that paint mist particles sprayed out of the spray gun form a flat and uniform coating on the surface of the aircraft under the action of gravity and air flow in the spray chamber; when the spray gun sprays from the machine head to the machine tail, the gas flow rate in the spray chamber is 300m/s-500m/s, and the spraying speed of the spray gun is 600mm/s-1000mm/s; when the spray gun sprays from the tail to the head, the gas flow rate in the spray chamber is 300m/s-500m/s, and the spraying speed of the spray gun is 345mm/s-590mm/s; the aircraft surface is uniformly coated with a wet film coating.
2. The aircraft coating method based on paint mist particle settlement control according to claim 1, wherein the time for which paint mist particles sprayed from the spray gun are fused with a wet film coating on the surface of an aircraft is not more than 0.5s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211469729.4A CN115739553B (en) | 2022-11-22 | 2022-11-22 | Aircraft coating method based on paint mist particle sedimentation control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211469729.4A CN115739553B (en) | 2022-11-22 | 2022-11-22 | Aircraft coating method based on paint mist particle sedimentation control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115739553A CN115739553A (en) | 2023-03-07 |
| CN115739553B true CN115739553B (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211469729.4A Active CN115739553B (en) | 2022-11-22 | 2022-11-22 | Aircraft coating method based on paint mist particle sedimentation control |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7666077B1 (en) * | 2007-11-13 | 2010-02-23 | Global Finishing Solutions, L.L.C. | Paint booth arrangement and method for directing airflow |
| CN205868673U (en) * | 2016-08-10 | 2017-01-11 | 潍坊远大金属表面科技有限公司 | Spraying chamber |
| CN106861981A (en) * | 2017-02-06 | 2017-06-20 | 中国民航大学 | A kind of rope drives aircraft spray painting motion platform |
| CN207413707U (en) * | 2017-10-26 | 2018-05-29 | 广汽丰田汽车有限公司 | Basecoat paint system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004062772A2 (en) * | 2003-01-06 | 2004-07-29 | Global Finishing Solutions Llc | Aircraft spray booth |
| US10604276B2 (en) * | 2017-10-02 | 2020-03-31 | The Boeing Company | Aircraft wing-body section spray containment system |
-
2022
- 2022-11-22 CN CN202211469729.4A patent/CN115739553B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7666077B1 (en) * | 2007-11-13 | 2010-02-23 | Global Finishing Solutions, L.L.C. | Paint booth arrangement and method for directing airflow |
| CN205868673U (en) * | 2016-08-10 | 2017-01-11 | 潍坊远大金属表面科技有限公司 | Spraying chamber |
| CN106861981A (en) * | 2017-02-06 | 2017-06-20 | 中国民航大学 | A kind of rope drives aircraft spray painting motion platform |
| CN207413707U (en) * | 2017-10-26 | 2018-05-29 | 广汽丰田汽车有限公司 | Basecoat paint system |
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| Publication number | Publication date |
|---|---|
| CN115739553A (en) | 2023-03-07 |
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