A self-swinging spray flash gun and a spraying method thereof

Abstract

The application discloses a self-swinging spraying flash gun and a spraying method thereof, which comprises a shell, a power supply assembly is arranged in the shell, a spraying assembly is arranged at the front end of the shell, a movement assembly is arranged below the spraying assembly, a first motor and a second motor are arranged in the movement assembly, a control assembly is arranged in the shell, a plurality of laser range finders are mounted at the front end of the shell, the laser range finders are electrically connected with the control assembly, an input and display assembly is arranged at the rear end of the shell, and the control assembly controls the first motor and the second motor to rotate at a uniform speed and reciprocate at a set speed and angle to complete longitudinal and transverse spraying after receiving distance data measured by the laser range finders, spraying parameters input by a parameter setting key and a switch signal transmitted by a spraying switch. The spraying flash gun has simple structure, can be operated by one person, contains preset parameters, can complete spraying work by one key, reduces the complexity of the repair operation of the damaged area of the coating, and is suitable for in-situ repair of aircraft damage.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aircraft spraying technology, and in particular to a self-swinging spraying flash gun and a spraying method thereof. BACKGROUND

[0002] At present, the local repair of aircraft coatings in China mainly relies on manual spraying and robot spraying. Manual spraying is highly dependent on the experience of workers in terms of paint film performance, spraying efficiency and paint utilization rate, and the bottleneck is increasingly apparent. Moreover, the quality of the repaired coating is unstable, which cannot meet the increasing development requirements of aircraft coating technology. Robot spraying can make up for the shortcomings of manual spraying to a great extent due to its excellent kinematic control and rapid and accurate control of spraying process parameters. However, the current aircraft surface coating damage is mainly small-area local damage. The use of robots for automatic repair has high equipment cost, complex composition, high operation difficulty, and is difficult to move. There are problems such as long pipeline, complex programming, lagging of gas path and coating control, and it is difficult to repair the local damage of the aircraft surface coating in situ. Therefore, how to provide a self-swinging spraying flash gun and a spraying method thereof is a problem that needs to be solved by those skilled in the art. SUMMARY

[0003] An object of the present application is to provide a self-swinging spraying flash gun and a spraying method thereof. The spraying flash gun of the present application has simple structure, small size, light weight and low price, can be operated by a single person, contains preset parameters, and can complete the spraying work with one key, is simple and convenient to use, reduces the complexity of the repair operation of the coating damage area, and is suitable for in-situ repair of aircraft damage.

[0004] According to the self-swinging spraying flash gun of the present application, a power supply assembly is pre-set in the shell,

[0005] A spraying assembly is arranged at the front end of the shell and is used for spraying the aircraft coating.

[0006] A movement assembly is arranged below the spraying assembly, and the movement assembly is provided with a first motor and a second motor.

[0007] A control assembly is arranged in the shell, and a plurality of laser range finders are mounted on the front end of the shell, and the laser range finders are electrically connected to the control assembly.

[0008] An input and display assembly is arranged at the rear end of the shell. After the control assembly receives the distance data measured by the laser range finders, the spraying parameters input by the parameter setting keys and the switch signals transmitted by the spraying switches, the first motor and the second motor are controlled to rotate at a uniform speed and at a set angle to complete longitudinal and transverse spraying.

[0009] Optionally, the spraying assembly comprises a spray gun arranged on the movement assembly, a paint tank is arranged on the spray gun, and the paint tank outlet communicates with the spray gun inlet, an explosion-proof electromagnetic valve is installed in the shell, a quick plug on the right side of the explosion-proof electromagnetic valve is connected to the upper part of the air inlet connector through a high-pressure air pipe, the air inlet connector is fixed in the shell through a nut, the lower part of the air inlet connector is connected with the high-pressure air compressor through a high-pressure air pipe to provide high-pressure air for the spraying assembly, the positive electrode of the wiring post above the explosion-proof electromagnetic valve is connected with the relay, and the negative electrode of the wiring post above the explosion-proof electromagnetic valve is connected with the power management module to control the air supply of the spray gun.

[0010] Optionally, the movement assembly comprises a first rotating disc and a second rotating disc, the output shaft of the first motor is arranged upwardly, the first rotating disc is fixed on the first motor through a screw, a first motor support is fixedly installed above the first rotating disc, a second motor is fixed on the first motor support laterally, the first motor and the second motor are electrically connected with the power management module through a power line, the second rotating disc is fixed on the front side of the second motor through a screw, a bearing is fixed on the rear side of the first motor support through a bolt, and the bearing and the second rotating disc jointly fix and support the second motor support, the front side of the second motor support is fixed on the second rotating disc through a bolt, the rear side of the second motor support is coaxially matched with the bearing, and a spray gun base is arranged on the second motor support.

[0011] Optionally, the spray gun base comprises a spray gun air outlet, a fixing hole and an air inlet, the spray gun base is fixed below the spray gun through the fixing hole and a bolt, the upper surface of the spray gun base is an arc surface and is matched with the lower surface of the spray gun, the air outlet is matched with the air inlet below the spray gun to provide high-pressure air for spraying, and the air inlet is connected to the quick plug on the left side of the explosion-proof electromagnetic valve through a high-pressure air pipe.

[0012] Optionally, the control assembly comprises a data processing control board, a relay and a laser pointer which are electrically connected with the first motor and the second motor, the signal input end of the relay is connected with the data processing control board, the positive electrode of the output end of the relay is connected with the positive electrode of the power assembly, and the negative electrode of the output end of the relay is connected with the positive electrode wiring post of the explosion-proof electromagnetic valve to control the switch of the explosion-proof electromagnetic valve, the laser range finder comprises a first laser range finder, a second laser range finder and a third laser range finder which are installed on the front end of the shell, the laser range finder and the left end face of the spray gun are located in the same plane to measure the distance between the spray gun and the aircraft spraying area and transmit the distance data to the data processing control board, and the laser pointer is arranged below the laser range finder.

[0013] Optionally, the laser pointer and the spray gun form an included angle γ, and the light spot formed by the laser pointer during spraying is located at the geometric center of the aircraft spraying area.

[0014] Wherein, the included angle γ calculation formula is:

[0015]

[0016] In the formula, L1 is the vertical distance between the laser pointer and the spray gun axis, and L2 is the vertical distance between the center point of the left end face of the spray gun and the surface of the aircraft spraying area, that is, the distance measured by the laser range finder.

[0017] Optionally, the input and display assembly includes a display screen, a parameter setting key and a spraying switch arranged at the rear end of the housing, and the display screen, the parameter setting key and the spraying switch are electrically connected with the data processing control board.

[0018] Optionally, the power supply assembly includes a rechargeable battery, a power management module, a power switch and a charging interface, the positive electrode of the rechargeable battery is connected with the positive electrode of the power switch, the negative electrode of the rechargeable battery is connected with the negative electrode of the power management module, the rechargeable battery is used for power supply of the internal components of the spraying flash gun, and the positive and negative electrodes of the rechargeable battery are connected with the positive and negative electrodes of the charging interface, respectively.

[0019] A spraying method of the self-swinging spraying flash gun, comprising the following method steps:

[0020] S1, cleaning the oil stains, rust and damaged coating on the surface of the aircraft spraying parts, and using adhesive tape to paste protective paper around the damaged coating area to prevent paint from splashing onto the intact coating, the inner boundary of the protective paper is tightly attached to the outer boundary of the damaged area, and the distance between the outer boundary of the protective paper and the outer boundary of the damaged area is more than 200mm;

[0021] S2, treating the surface of the damaged area of the parts with acetone for 1-3 times;

[0022] S3, turning on the power switch of the spraying flash gun, the system in the data processing control board is self-checked, the spray gun is adjusted to the original position angle θ0, θ3 through the motion assembly, and the laser range finder and the laser pointer are turned on;

[0023] S4, setting the spraying area length, width, spraying speed, spraying times, vertical reserved angle and horizontal reserved angle spraying parameters through the parameter setting key according to the size of the damaged area of the aircraft and the type of paint;

[0024] S5, after confirming that the spraying parameters are correct, observing the three measured distances displayed on the display screen, holding and moving the spraying flash gun, adjusting the distance between the spray gun and the surface of the damaged area to 200-500mm, and the spray gun is perpendicular to the surface of the damaged area when the distances measured by the first laser range finder, the second laser range finder and the third laser range finder are consistent.

[0025] S6, the handheld mobile spraying flash gun makes the cross light spot emitted by the laser pointer to be located at the geometric center of the damage area, and keeps the horizontal line of the cross light spot parallel to the horizontal side of the damage area and the vertical line of the cross light spot perpendicular to the horizontal side of the damage area;

[0026] S7, the spraying switch is pressed, the data processing control board controls the first motor to rotate to the left rotation angle θ1, the relay is turned on, the explosion-proof electronic valve is pre-sprayed for a certain time, and then the second motor rotates by an angle β0;

[0027] S8, after pre-spraying, the first motor sprays from the left rotation angle θ1 to the right rotation angle θ2 according to the set speed;

[0028] S9, the second motor rotates from the rotation angle β0 to the angle β1 according to the set speed, and then the first motor sprays from the right rotation angle θ2 to the left rotation angle θ1 according to the set speed;

[0029] S10, repeat S8 and S9 until the second motor rotates to the rotation angle β n , complete a spraying;

[0030] S11, repeat S8, S9 and S10 until the set spraying times are completed;

[0031] S12, after spraying is completed, the relay is disconnected and the explosion-proof electromagnetic valve is closed;

[0032] S13, after spraying is completed, the coating in the coating tank is replaced with a cleaning agent, a cleaning program is started, and the spray gun is cleaned to prevent the spray gun from being blocked.

[0033] Optionally, the spraying flash gun movement spraying track is formed by connecting the front and back of the spray gun position, and the spray gun position is controlled by the rotation angle of the first motor and the second motor, the left rotation angle and the right rotation angle are realized by the first motor, and the upper rotation angle and the lower rotation angle are realized by the second motor;

[0034] Wherein, the calculation formula of the left rotation angle θ1 of the first motor is:

[0035] θ1 = θ0 - arctan (L3 / L2) - α1

[0036] The calculation formula of the right rotation angle θ2 of the first motor is:

[0037] θ2 = θ0 + arctan (L3 / L2) + α1

[0038] The calculation formula of the rotation angle β n of the second motor is:

[0039] β n= θ3 + arctan ((L4 / 2 - n x L5) / L2) + α2

[0040] (n = 0, 1, …, L4 / L5 + 1)

[0041] In the formula, θ0 is the first motor original position angle, L2 is the vertical distance between the spray gun and the damage area, L3 is the damage area length, α1 is the horizontal spraying reserved angle, θ3 is the second motor original position angle, L4 is the damage area width, L5 is the spray gun spray width, and α2 is the vertical spraying reserved angle.

[0042] The beneficial effects of the present application are:

[0043] (1) The first motor and the second motor are built in the spray flash gun, which can automatically reciprocate at a uniform speed according to the set speed and trajectory to complete longitudinal and transverse large area spraying, solving the problem of unstable speed caused by manual swing spraying.

[0044] (2) The spray flash gun of the present application is built in the explosion-proof electromagnetic valve, and the paint tank is installed on the side, which shortens the gas and material supply distance, reduces the control time delay, and has a fast reaction speed, effectively solving the dripping after spraying is completed.

[0045] (3) The spray flash gun of the present application is built in the data processing control board, which can set parameters such as spraying area length and width, spraying speed, spraying times, and spraying reserved angle, and can automatically plan the spraying trajectory according to the spraying parameters.

[0046] (4) The spray flash gun of the present application has simple structure, small size, light weight, and low price, and can be operated by a single person, contains preset parameters, and can complete the spraying work with one key, which is simple and convenient to use, reduces the complexity of the coating damage area repair operation, and is suitable for in-situ repair of aircraft damage. BRIEF DESCRIPTION OF DRAWINGS

[0047] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, which together with the embodiments of the present application, serve to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0048] Figure 1 It is a structure schematic view of a self-swinging spray flash gun proposed by the present application;

[0049] Figure 2 It is a structure schematic view of a spraying assembly in a self-swinging spray flash gun proposed by the present application;

[0050] Figure 3 It is a left view structure schematic view of a motion assembly in a self-swinging spray flash gun proposed by the present application;

[0051] Figure 4A schematic diagram of the main structure of a motion assembly in a self-swinging spraying flash gun according to the present application is shown in the figure;

[0052] Figure 5 A schematic diagram of the structure of a gun base in a self-swinging spraying flash gun according to the present application is shown in the figure;

[0053] Figure 6 A schematic diagram of the structure of a control assembly in a self-swinging spraying flash gun according to the present application is shown in the figure;

[0054] Figure 7 A schematic diagram of the structure of an input and display assembly in a self-swinging spraying flash gun according to the present application is shown in the figure;

[0055] Figure 8 A schematic diagram of the structure of a housing in a self-swinging spraying flash gun according to the present application is shown in the figure

[0056] Figure 9 A schematic diagram of the internal structure of a lower housing in a self-swinging spraying flash gun according to the present application is shown in the figure;

[0057] Figure 10 A block diagram of a self-swinging spraying flash gun according to the present application is shown in the figure;

[0058] Figure 11 A flowchart of internal connection and control of a self-swinging spraying flash gun and its spraying method according to the present application is shown in the figure;

[0059] Figure 12 A flowchart of the coating repair process of a self-swinging spraying flash gun and its spraying method according to the present application is shown in the figure.

[0060] In the figure: 1 - spraying assembly, 2 - motion assembly, 3 - control assembly, 4 - input and display assembly, 5 - power supply assembly, 6 - housing;

[0061] 11 - gun, 12 - paint tank, 13 - explosion-proof electromagnetic valve, 14 - air inlet joint;

[0062] 21 - first motor, 22 - first turntable, 23 - first motor support, 24 - second turntable, 25 - second motor support, 26 - second motor, 27 - gun base, 271 - gun air outlet hole, 272 - fixing hole, 273 - air inlet hole, 28 - bearing;

[0063] 31 - data processing control board, 32 - relay, 33 - first laser range finder, 34 - second laser range finder, 35 - third laser range finder, 36 - laser pointer;

[0064] 41 - display screen, 42 - parameter setting key, 43 - spraying switch;

[0065] 51 - rechargeable battery, 52 - power management module, 53 - power switch, 54 - charging interface;

[0066] 61 - lower housing, 62 - upper housing, 63 - right cover, 611 - laser pointer mounting hole, 612 - laser range finder mounting hole, 613 - motor mounting hole, 614 - relay mounting hole, 615 - explosion-proof electromagnetic valve mounting hole, 616 - power management module mounting hole, 617 - power switch mounting hole, 618 - data processing control board mounting hole, 619 - right cover mounting hole, 6110 - charging interface mounting hole, 6111 - air inlet joint mounting hole, 6112 - spraying switch mounting hole, 6113 - power supply compartment. DETAILED DESCRIPTION

[0067] The application will now be described in further detail with reference to the drawings. These drawings are simplified schematic diagrams which show only the basic structure of the application in a schematic manner, and thus only show the components relevant to the application.

[0068] Reference Figure 1 A self-swinging spraying flash gun, comprising a housing 6, a power supply assembly 5 is arranged in the housing 6,

[0069] A spraying assembly 1 is arranged at the front end of the housing 6, and is used for spraying the coating of an airplane;

[0070] A movement assembly 2 is arranged below the spraying assembly 1, and the movement assembly 2 is provided with a first motor 21 and a second motor 26;

[0071] A control assembly 3 is arranged in the housing 6, and a plurality of laser range finders are mounted at the front end of the housing 6, and the laser range finders are electrically connected with the control assembly 3;

[0072] An input and display assembly 4 is arranged at the rear end of the housing 6, and the control assembly 3 receives distance data measured by the laser range finders, spraying parameters input by a parameter setting key 42, and switch signals transmitted by a spraying switch 43, and then controls the first motor 21 and the second motor 26 to rotate at a uniform speed and at a set angle to complete longitudinal and transverse spraying through uniform reciprocating swing.

[0073] Reference Figure 2In the embodiment, the spraying assembly 1 comprises a spray gun 11 arranged on the motion assembly 2, and a paint tank 12 is arranged on the spray gun 11 and is installed on the side feed inlet of the spray gun 11 through a straight-through adapter. The paint tank 12 adopts gravity feeding to reduce the feeding distance, so that the paint tank 12 needs to be kept vertically upward during spraying, and the included angle between the paint tank 12 and the spray gun 11 needs to be adjusted through the installation angle of the straight-through adapter at different spraying angles. The paint tank 12 is communicated with the feed inlet of the spray gun 11, an explosion-proof electromagnetic valve 13 is installed in the shell 6, the bottom of the explosion-proof electromagnetic valve 13 is fixed on the explosion-proof electromagnetic valve mounting hole 615 on the lower shell 61 through bolts, the quick plug on the right side of the explosion-proof electromagnetic valve 13 is connected to the upper side of the air inlet connector 14 through a high-pressure air pipe, the air inlet connector 14 is fixed in the shell 6 through a nut, the lower side of the air inlet connector 14 is connected with a high-pressure air compressor through a high-pressure air pipe, which is used to provide high-pressure air for the spraying assembly 1, the positive electrode of the wiring post above the explosion-proof electromagnetic valve 13 is connected with a relay 32, and the negative electrode of the wiring post above the explosion-proof electromagnetic valve 13 is connected with a power management module 52, which is used to control the air supply of the spray gun 11.

[0074] Reference Figures 3-5 In the embodiment, the motion assembly 2 comprises a first rotating disc 22 and a second rotating disc 24. The output shaft of a first motor 21 is arranged upwardly. The first rotating disc 22 is fixed on the upper side of the first motor 21 through screws. A first motor support 23 is fixedly installed on the upper side of the first rotating disc 22. A second motor 26 is fixed on the side of the first motor support 23. The first motor 21 and the second motor 26 are electrically connected with a power management module 52 through power lines. The second rotating disc 24 is fixed on the front side of the second motor 26 through screws. A bearing 28 is fixed on the rear side of the first motor support 23 through bolts and is coaxially matched with the second rotating disc 24 to jointly fix and support a second motor support 25. The front side of the second motor support 25 is fixed on the second rotating disc 24 through bolts. The rear side of the second motor support 25 is coaxially matched with the bearing 28. A spray gun base 27 is arranged on the second motor support 25.

[0075] In the embodiment, the spray gun base 27 comprises a spray gun air outlet hole 271, a fixing hole 272 and an air inlet hole 273. The spray gun base 27 is fixed below the spray gun 11 through the fixing hole 272. The upper surface of the spray gun base 27 is an arc-shaped curved surface and is matched with the lower surface of the spray gun 11. The air outlet hole 271 is matched with the air inlet hole below the spray gun 11 and is used to provide high-pressure air for spraying. The air inlet hole 273 is connected to the quick plug on the left side of the explosion-proof electromagnetic valve 13 through a high-pressure air pipe.

[0076] Reference Figure 6In the embodiment, the control assembly 3 comprises a data processing control board 31, a relay 32 and a laser pointer 36, which are electrically connected to the first motor 21 and the second motor 26. The signal input end of the relay 32 is connected to the data processing control board 31. The positive output end of the relay 32 is connected to the positive pole of the power supply assembly 5. The negative output end of the relay 32 is connected to the positive terminal of the explosion-proof electromagnetic valve 13, which is used to control the opening and closing of the explosion-proof electromagnetic valve 13. The laser range finder comprises a first laser range finder 33, a second laser range finder 34 and a third laser range finder 35, which are installed on the front end of the shell 6 and are located in the same plane as the left end face of the spray gun 11. The laser range finder is used to measure the distance between the spray gun 11 and the aircraft spraying area and transmit the distance data to the data processing control board 31. The laser pointer 36 is arranged below the laser range finder.

[0077] In the embodiment, the laser pointer 36 forms an angle γ with the spray gun 11. When the laser pointer 36 sprays, the light spot formed is located at the geometric center of the aircraft spraying area.

[0078] The formula for calculating the angle γ is as follows:

[0079]

[0080] In the formula, L1 is the vertical distance between the laser pointer 36 and the axis of the spray gun 11. L2 is the vertical distance between the center point of the left end face of the spray gun 11 and the surface of the aircraft spraying area, i.e. the distance measured by the laser range finder.

[0081] Reference Figure 7 In the embodiment, the input and display assembly 4 comprises a display screen 41, a parameter setting key 42 and a spraying switch 43, which are arranged on the rear end of the shell 6. The display screen 41, the parameter setting key 42 and the spraying switch 43 are electrically connected to the data processing control board 31. The data processing control board 31 receives the distance data measured by the laser range finder 34, the spraying parameters input by the parameter setting key 42 and the switch signal transmitted by the spraying switch 43, and outputs the self-swinging spraying flash gun state information to the display screen 41.

[0082] Reference Figure 8 The power supply assembly comprises a rechargeable battery 51, a power management module 52, a power switch 53 and a charging interface 54. The positive pole of the rechargeable battery 51 is connected to the positive pole of the power switch 53. The negative pole of the rechargeable battery 51 is connected to the negative pole of the power management module 52, which is used to supply power to the internal components of the spraying flash gun. The positive and negative poles of the rechargeable battery 51 are connected to the positive and negative poles of the charging interface 54, respectively.

[0083] In this embodiment, the rechargeable battery 51 is placed in the battery compartment 6113 inside the handle of the lower housing 61 and is fixed by the cooperation of the lower housing 61, the upper housing 62 and the rear cover 63. The power management module 52 is fixed to the power management module mounting hole 616 of the lower housing by two screws, the positive electrode is connected to the negative electrode of the power switch 53, the negative electrode is connected to the negative electrode of the rechargeable battery 51, and is used to step down the output voltage of the rechargeable battery 51 and keep the voltage stable, and supply power to the internal devices of the self-swinging spray flash gun. The power switch 53 is fixed to the power switch fixing hole 617 of the lower housing 61 by a nut, the positive electrode is connected to the positive electrode of the rechargeable battery 51, and the negative electrode is connected to the positive electrode of the power management module, which is used to control the on-off of the power supply of the self-swinging spray flash gun. The charging interface 54 is fixed to the charging interface mounting hole 6110 on the lower end surface of the handle of the lower housing 61 by a nut, and the positive and negative electrodes of the charging interface 54 are connected to the positive and negative electrodes of the rechargeable battery 51 respectively for battery charging.

[0084] Reference Figure 11 A spraying method of a self-swinging spray flash gun, comprising the following method steps:

[0085] S1, cleaning the oil stains, rust and damaged coating on the surface of the aircraft spraying parts, and using adhesive tape to paste protective paper around the damaged coating area to prevent paint from splashing onto the intact coating. The inner boundary of the protective paper is tightly attached to the outer boundary of the damaged area, and the distance between the outer boundary of the protective paper and the outer boundary of the damaged area is more than 200mm;

[0086] S2, treating the surface of the damaged area of the parts with acetone for 1-3 times;

[0087] S3, turn on the power switch 53 of the spray flash gun, the system in the data processing control panel 31 is self-checked, adjust the spray gun 11 to the original position angle θ0, θ3 through the motion assembly 2, and turn on the laser range finder and the laser pointer 36;

[0088] S4, according to the size of the damaged area of the aircraft and the type of paint, set the spraying area length, width, spraying speed, spraying times, vertical reserved angle and horizontal reserved angle spraying parameters through the parameter setting key 42;

[0089] S5, after confirming that the spraying parameters are correct, observe the three measurement distances displayed on the display screen 41, hold and move the spray flash gun, adjust the distance between the spray gun 11 and the surface of the damaged area to 200-500mm, and the spray gun is perpendicular to the surface of the damaged area when the distances measured by the first, second and third laser range finders 33, 34 and 35 are consistent;

[0090] S6, hold and move the spray flash gun so that the cross-shaped light spot emitted by the laser pointer 36 is located at the geometric center of the damaged area, and keep the horizontal line of the cross-shaped light spot parallel to the horizontal side of the damaged area, and the vertical line of the cross-shaped light spot perpendicular to the horizontal side of the damaged area.

[0091] S7, press the spray switch 43, the data processing control board 31 controls the first motor 21 to rotate to the left rotation angle θ1, the relay 32 is turned on, the explosion-proof electronic valve 13 is pre-sprayed for a certain time, the air in the spray gun 11 pipeline is discharged, and then the second motor 26 rotates an angle β0;

[0092] S8, after pre-spraying, the first motor 21 sprays from the left rotation angle θ1 to the right rotation angle θ2 according to the set speed;

[0093] S9, the second motor 26 rotates from the rotation angle β0 to the angle β1 according to the set speed, and then the first motor 21 sprays from the right rotation angle θ2 to the left rotation angle θ1 according to the set speed;

[0094] S10, repeat S8 and S9 until the second motor 26 rotates to the rotation angle β n , complete a spraying;

[0095] S11, repeat S8, S9 and S10 until the set spraying times are completed;

[0096] S12, after spraying, the relay 32 is disconnected, and the explosion-proof electromagnetic valve 13 is closed;

[0097] S13, after spraying, the paint in the paint tank 12 is replaced with cleaning agent, the cleaning program is started, and the spray gun is cleaned to prevent the spray gun from being blocked.

[0098] Reference Figure 10 In the embodiment, the internal connection and control of the spray flash gun are as follows: the charging interface 54 supplies power to the charging battery 51, the charging battery 51 supplies power to the data processing control board 31, the first motor 21, the second motor 26 and the relay 32 through the power switch 53 and the power management module 52, the data processing control board 31 plans the spraying track according to the signals of the spraying switch and the parameter setting key, controls the relay 32 to open the explosion-proof electromagnetic valve 15, controls the first motor 21 and the second motor 26 to drive the first motor support 23, the second motor support 25 and the spray gun 11 to reciprocate according to the planned speed and angle, and opens the laser indicator 36 to display the spraying state information on the display screen 41, the air inlet joint 14 provides high-pressure gas for the spray gun 11 through the electromagnetic valve 13, and the paint tank 12 provides paint for the spray gun 11,

[0099] The spraying track of the spray flash gun is formed by connecting the positions of the spray gun 11 in front and back, and the positions of the spray gun 11 are controlled by the rotation angles of the first motor 21 and the second motor 26. The left rotation angle and the right rotation angle are realized by the first motor 21, and the upper rotation angle and the lower rotation angle are realized by the second motor 26;

[0100] Wherein, the calculation formula of the left rotation angle θ1 of the first motor 21 is:

[0101] θ1 = θ0 - arctan (L3 / L2) - α1

[0102] The calculation formula of the right rotation angle θ2 of the first motor 21 is:

[0103] θ2 = θ0 + arctan (L3 / L2) + α1

[0104] The calculation formula of the rotation angle β of the second motor 26 is: n

[0105] β n = θ3 + arctan ((L4 / 2 - n x L5) / L2) + α2

[0106] (n = 0, 1, …, L4 / L5 + 1)

[0107] In the formula, θ0 is the original position angle of the first motor 21, L2 is the vertical distance between the spray gun 11 and the damage area, L3 is the length of the damage area, α1 is the horizontal spraying reserved angle, θ3 is the original position angle of the second motor 26, L4 is the width of the damage area, L5 is the spray width of the spray gun, and α2 is the vertical spraying reserved angle.

[0108] It can be understood that the control of the explosion-proof electromagnetic valve 13, the first motor 21, the second motor 26, the laser range finder, the relay 32 and the laser pointer 36 can be programmed and controlled by the system in the data processing control board 31, and the control principle can be realized by existing control technology. The types of the explosion-proof electromagnetic valve 13, the first motor 21, the second motor 26, the laser range finder, the data processing control board 31, the relay 32 and the laser pointer 36 are not limited to a single type and can be the types suitable for the present application in the market.

[0109] Example 1, taking the repair of a 100mm damage area of a local coating on the surface of an airplane as an example:

[0110] S1, clean the oil stains, rust, damaged coating on the surface of the airplane parts, and use adhesive tape to paste protective paper around the damaged coating area to prevent paint from splashing onto the intact coating. The inner boundary of the protective paper is closely attached to the outer boundary of the damaged area, and the distance between the outer boundary of the protective paper and the outer boundary of the damaged area is 300mm;

[0111] S2, use acetone to treat the surface of the damaged area of the parts 1-3 times;

[0112] S3, turn on the self-swinging spray flash gun power switch 53, the system is self-checked, the first motor 21 is rotated to the original position angle of 90°, the second motor 26 is rotated to the original position angle of 90°, and the laser range finder and the laser pointer 36 are turned on;​

[0113] S4, according to the size of the damage area, the type of paint, set the spraying area length 200mm, width 200mm, spraying speed 300mm / s, spraying times, horizontal reserved angle 3°, vertical reserved angle 2°, spraying parameters through the parameter setting key 42;

[0114] S5, after confirming the spraying parameters, observe the three measuring distances displayed on the display screen 41, hold and move the self-swinging spraying flash gun, adjust the distance between the spraying gun 11 and the surface of the damage area to 400mm, and the first laser range finder 33, the second laser range finder 34 and the third laser range finder 35 measure the distance consistently, then the spraying gun 11 is perpendicular to the surface of the damage area;

[0115] S6, hold and move the self-swinging spraying flash gun to make the cross light spot emitted by the laser pointer 36 located at the geometric center of the damage area, and keep the horizontal line of the cross light spot parallel to the horizontal side of the damage area, and the vertical line of the cross light spot perpendicular to the horizontal side of the damage area;

[0116] S7, press the spraying switch 43, the data processing control board 31 controls the first motor 21 to rotate to the left rotation angle 74.5°, the relay 32 is turned on, the explosion-proof electronic valve 15 performs a certain time of pre-spraying, releases the air in the pipeline of the spraying gun 11, and then the second motor 26 rotates an angle of 117°;

[0117] S8, after pre-spraying, the first motor 21 sprays from the left rotation angle 74.5° to the right rotation angle 117.5° according to the set speed;

[0118] S9, the second motor 26 rotates from the rotation angle 117° to the angle 117.5° according to the set speed, and then the first motor 21 sprays from the right rotation angle 117.5° to the left rotation angle 74.5° according to the set speed;

[0119] S10, repeat S8 and S9 until the second motor 26 rotates to the angle 115.6°, completing a spraying;

[0120] S11, repeat S8, S9 and S10 until the set spraying times are completed;

[0121] S12, after spraying is completed, disconnect the relay 32 and close the explosion-proof electromagnetic valve 13;

[0122] S13, after spraying is completed, replace the paint in the paint tank 12 with a cleaning agent, start the cleaning program, and clean the spraying gun to prevent the spraying gun from being blocked.

[0123] The first motor 21 and the second motor 26 are arranged in the spraying flash gun, and the spraying flash gun can automatically reciprocate at a uniform speed according to a set speed and a track to complete longitudinal and transverse large-area spraying, so that the problem of unstable speed caused by manual swinging spraying is solved, the explosion-proof electromagnetic valve 15 is arranged in the spraying flash gun, and the paint tank 12 is arranged on the side, so that the gas supply and material supply distance is shortened, the control time delay is reduced, the reaction speed is fast, and the dripping after spraying is effectively solved; the data processing control board 31 is arranged in the spraying flash gun, parameters such as the length and width of the spraying area, the spraying speed, the spraying times, and the spraying reserved angle can be set, and the spraying track can be automatically planned according to the spraying parameters, the spraying flash gun has the advantages of simple structure, small size, light weight, low price, and single-person handheld operation; the preset parameters are arranged, and the spraying work can be completed by one key; the spraying flash gun is simple and convenient to use, the complexity of the operation of repairing the damaged area of the coating is reduced, and is suitable for in-situ repair of the aircraft damage.

[0124] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, and all of them should be covered within the protection scope of the present application.

Claims

1. A self-oscillating spray gun, characterized in that, include: Housing (6), wherein a power supply assembly (5) is pre-installed inside the housing (6); Spraying assembly (1), which is disposed at the front end of housing (6) and is used to spray the aircraft coating; A motion assembly (2) is disposed below the spraying assembly (1). The motion assembly (2) contains a first motor (21) and a second motor (26). The output axis of the first motor (21) is axially upward. A first turntable (22) is fixed above the first motor (21) by screws. A first motor bracket (23) is fixedly installed above the first turntable (22). The second motor (26) is laterally fixed on the first motor bracket (23). A second turntable (24) is fixed to the front side of the second motor (26) by screws. A bearing (28) is fixed to the rear side of the first motor bracket (23) by bolts. The bearing (28) and the second turntable (24) together fix and support the second motor bracket (25). A spray gun base (27) is disposed on the second motor bracket (25). The spray gun base (27) is fixed below the spray gun by bolts. The control component (3) is located inside the housing (6), and the front end of the housing (6) is equipped with a first laser rangefinder (33), a second laser rangefinder (34) and a third laser rangefinder (35). The first laser rangefinder (33), the second laser rangefinder (34) and the third laser rangefinder (35) are all located on the same plane as the left end face of the spray gun (11) and are used to measure the distance between the spray gun (11) and the aircraft spraying area. Input and display component (4), the input and display component (4) is located at the rear end of housing (6). When the hand-held housing moves the spray gun, it is aimed at the damaged area on the aircraft coating. The control component (3) receives the distance data measured by the laser rangefinder, the spraying parameters input by the parameter setting key (42), and the switch signal transmitted by the spraying switch (43), and controls the first motor (21) and the second motor (26) to rotate at a set speed and angle and swing back and forth at a uniform speed to complete the horizontal and vertical spraying. The spraying trajectory of the spray gun is formed by the movement of the spray gun (11), and the position of the spray gun (11) is controlled by the rotation angle of the first motor (21) and the second motor (26). The left rotation angle is... Right rotation angle This is achieved through the first motor (21), rotating the angle. This is achieved through a second motor (26); Among them, the first motor (21) rotates to the left at an angle The calculation formula is: The first motor (21) rotates to the right at the following angle. The calculation formula is: Second motor (26) rotation angle The calculation formula is: In the formula, L1 is the in-situ angle of the first motor (21), L2 is the vertical distance between the spray gun (11) and the damaged area, and L3 is the length of the damaged area. Angle is reserved for horizontal spraying. L4 is the in-situ angle of the second motor (26), L5 is the width of the damaged area, and L6 is the spray width of the spray gun. An angle is reserved for vertical spraying.

2. The self-oscillating spray gun according to claim 1, characterized in that, The spraying assembly (1) includes a spray gun (11) mounted on the moving assembly (2). The spray gun (11) is equipped with a paint tank (12), and the outlet of the paint tank (12) is connected to the inlet of the spray gun (11). An explosion-proof solenoid valve (13) is installed inside the housing (6). The quick-release plug on the right side of the explosion-proof solenoid valve (13) is connected to the upper part of the air inlet connector (14) through a high-pressure air pipe. The air inlet connector (14) is fixed to the housing (6) with a nut. The lower part of the air inlet connector (14) is connected to a high-pressure air compressor through a high-pressure air pipe to provide high-pressure air to the spraying assembly (1). The positive terminal of the upper terminal of the explosion-proof solenoid valve (13) is connected to a relay (32), and the negative terminal of the upper terminal of the explosion-proof solenoid valve (13) is connected to a power management module (52) to control the air supply of the spray gun (11).

3. The self-oscillating spray gun according to claim 2, characterized in that, The motion component (2) includes a first turntable (22) and a second turntable (24). The first motor (21) and the second motor (26) are electrically connected to the power management module (52) via power lines. The front side of the second motor bracket (25) is fixed to the second turntable (24) by bolts, and the rear side of the second motor bracket (25) is coaxially fitted with the bearing (28).

4. The self-oscillating spray gun according to claim 3, characterized in that, The spray gun base (27) includes a spray gun air outlet (271), a fixing hole (272), and an air inlet (273). The spray gun base (27) is fixed to the bottom of the spray gun (11) by bolts through the fixing hole (272). The upper surface of the spray gun base (27) is an arc-shaped curved surface that matches the lower surface of the spray gun (11). The air outlet (271) matches the air inlet below the spray gun (11) to provide high-pressure air for spraying. The air inlet (273) is connected to the quick-release plug on the left side of the explosion-proof solenoid valve (13) through a high-pressure air pipe.

5. The self-oscillating spray gun according to claim 1, characterized in that, The control component (3) includes a data processing control board (31), a relay (32), and a laser pointer (36) electrically connected to both the first motor (21) and the second motor (26). The signal input terminal of the relay (32) is connected to the data processing control board (31), the positive terminal of the relay (32) is connected to the positive terminal of the power supply component (5), and the negative terminal of the relay (32) is connected to the positive terminal of the explosion-proof solenoid valve (13) for controlling the opening and closing of the explosion-proof solenoid valve (13). The laser pointer (36) is located below the laser rangefinder. The first laser rangefinder (33), the second laser rangefinder (34), and the third laser rangefinder (35) transmit distance data to the data processing control board (31).

6. The self-oscillating spray gun according to claim 5, characterized in that, The laser pointer (36) forms an angle γ with the spray gun (11), and the laser pointer (36) places the light spot formed during spraying at the geometric center of the aircraft spraying area. The formula for calculating the included angle γ is: In the formula, L1 is the vertical distance between the laser pointer (36) and the axis of the spray gun (11), and L2 is the vertical distance between the center point of the left end face of the spray gun (11) and the surface of the aircraft spraying area, which is the distance measured by the laser rangefinder.

7. The self-oscillating spray gun according to claim 5, characterized in that, The input and display component (4) includes a display screen (41), a parameter setting key (42), and a spraying switch (43) located at the rear end of the housing (6). The display screen (41), the parameter setting key (42), and the spraying switch (43) are all electrically connected to the data processing control board (31).

8. The self-oscillating spray gun according to claim 1, characterized in that, The power supply assembly includes a rechargeable battery (51), a power management module (52), a power switch (53), and a charging interface (54). The positive terminal of the rechargeable battery (51) is connected to the positive terminal of the power switch (53), and the negative terminal of the rechargeable battery (51) is connected to the negative terminal of the power management module (52) for powering the internal components of the spray gun. The positive and negative terminals of the rechargeable battery (51) are respectively connected to the positive and negative terminals of the charging interface (54).

9. A spraying method using a self-oscillating spray gun, characterized in that, The self-oscillating spray gun according to any one of claims 1-8 comprises the following method steps: S1. Clean the oil, rust, and damaged coatings from the surface of the aircraft's painted parts, and use tape to stick protective paper around the damaged area of ​​the coating to prevent paint from splashing onto the intact coating. The inner boundary of the protective paper should be tightly attached to the outer boundary of the damaged area, and the distance between the outer boundary of the protective paper and the outer boundary of the damaged area should be more than 200mm. S2. Apply acetone to the damaged area of ​​the parts 1-3 times; S3. Turn on the power switch (53) of the spray gun. The system in the data processing control board (31) performs a self-test. Adjust the spray gun (11) to rotate to the original position angle of the first motor through the motion component (2). Second motor in-situ angle The first laser rangefinder (33), the second laser rangefinder (34), the third laser rangefinder (35), and the laser pointer (36) are turned on; S4. Based on the size of the damaged area of ​​the aircraft and the type of paint, set the spraying parameters through the parameter setting key (42): spraying area length, spraying area width, spraying speed, number of sprays, and vertical spraying reserved angle. Horizontal spraying reserved angle ; S5. After confirming that the spraying parameters are correct, observe the three measurement distances displayed on the display screen (41), move the spray gun by hand, and adjust the distance between the spray gun (11) and the surface of the damaged area to 200-500mm. If the measurement distances of the first laser rangefinder (33), the second laser rangefinder (34) and the third laser rangefinder (35) are consistent, then the spray gun is perpendicular to the surface of the damaged area. S6. Hold the shell and move the spray gun to make the crosshair of the laser pointer (36) located at the geometric center of the damaged area, and keep the horizontal line of the crosshair parallel to the horizontal edge of the damaged area and the vertical line of the crosshair perpendicular to the horizontal edge of the damaged area. S7. Press the spraying switch (43), and the data processing control board (31) controls the first motor (21) to rotate to the left rotation angle. The relay (32) is turned on to open the explosion-proof solenoid valve (13) so that the spray gun can perform pre-spraying for a certain period of time to release the air in the spray gun (11) pipeline. Then the second motor (26) rotates to the rotation angle. ; S8. After pre-spraying, the first motor (21) rotates from the left at the set speed. Turn to the right rotation angle Spraying is performed; S9, the second motor (26) rotates at a set speed from the set angle. Rotate to rotation angle Then the first motor (21) rotates to the right at the set speed. Turn to the left rotation angle Spraying is performed; S10, repeat S8 and S9 until the second motor (26) rotates to the desired rotation angle. Complete one spraying cycle; S11. Repeat S8, S9 and S10 until the set number of sprays is completed; S12. After the spraying is completed, disconnect the relay (32) and close the explosion-proof solenoid valve (13). S13. After spraying, replace the paint in the paint tank (12) with cleaning agent, start the cleaning program, and clean the spray gun to prevent the spray gun from clogging.

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