Automatic coating and removing device and method for absorbing layer on surface of underwater component

Abstract

The invention belongs to the technical field of laser shock peening surface treatment, and particularly relates to an automatic coating and removing device and method for an absorbing layer on the surface of an underwater component. A cavity for accommodating a to-be-strengthened workpiece is formed in the sealed cabin; the three-axis moving platform is fixed in the cavity; the drainage assembly is used for draining water in the sealed cabin; the dehumidification heating part is used for removing moisture and increasing the temperature in the sealed cabin; the detection part is used for detecting the surface coating quality of the to-be-strengthened workpiece; the cleaning part is arranged in the sealed cabin, and the cleaning part is used for recycling the stripped coating; the movable end of the three-axis moving platform is fixedly connected with an absorbing layer coating and recycling unit, and the absorbing layer coating and recycling unit comprises a PVA layer spraying and coating part, an absorbing layer spraying and coating part, a curing part and a solvent spraying and coating part. The invention further discloses a using method of the device. The device is full-automatic in machining, adapts to an underwater severe machining environment, is high in efficiency, and does not need to dismount workpieces for factory returning operation.

Description

Technical Field

[0001] This invention belongs to the field of laser shock peening surface treatment technology, and particularly relates to an automatic coating and removal device and method for the absorption layer on the surface of underwater components. Background Technology

[0002] Core load-bearing components of marine engineering equipment, such as deep-sea pipeline connecting rings, transmission shaft systems of seabed drilling and production equipment, and propeller blades of ship propellers, have been in service for a long time in extreme environmental coupling fields of high pressure, high salinity, strong corrosion and alternating loads, and face severe failure risks.

[0003] Traditional protection methods, such as sacrificial anode cathodic protection and passive anti-corrosion coatings, are difficult to actively intervene in the initiation stage of micro-defects in components, and often fail due to coating peeling caused by the high pressure environment of the deep sea.

[0004] Routine maintenance requires disassembling and returning damaged components to the factory for reprocessing, leading to extended downtime for marine equipment and a significant increase in operation and maintenance costs. For critical components such as the impellers of seawater circulation pumps in nuclear power plants, the risk of nuclear leakage due to failure is even more critical to public safety.

[0005] Therefore, there is an urgent need for intelligent maintenance devices with in-situ strengthening capabilities suitable for deep-sea environments, which can achieve laser shock repair and performance improvement of damaged areas without moving them from the work site, and simultaneously regenerate the anti-corrosion coating, forming an integrated "monitoring-repair-strengthening" technology system.

[0006] Underwater laser shock peening (LSP) is a core technology for improving the fatigue and corrosion resistance of marine engineering components. Its effectiveness heavily relies on the high-quality preparation of the absorption layer on the component's surface. This technology induces shock waves in water using a high-energy laser beam, generating beneficial residual compressive stress on the material's surface, thereby strengthening its microstructure. The higher the peak pressure of the plasma shock wave, the better the shock peening effect. The uniformity, adhesion, and stability of the absorption layer directly determine the energy absorption efficiency and shock wave transmission characteristics.

[0007] However, traditional underwater coating processes face multiple challenges. Traditional technologies lack technical solutions for underwater laser shock peening, and traditional processes do not consider coating uniformity or how to peel off the coating after the shock, which has significant limitations.

[0008] In underwater environments, manual or semi-automatic coating methods cannot guarantee uniform thickness of the absorption layer. The coating is prone to local peeling or accumulation, resulting in fluctuations in laser energy absorption rate and significantly weakening the impact strengthening effect. At the same time, due to the limitations of the underwater working environment, the coating and strengthening processes are often carried out separately, and the components need to be repeatedly transferred to different workstations, which is not only inefficient but also prone to coating contamination or damage due to exposure during the process.

[0009] Therefore, there is an urgent need for an automatic coating and removal device and method for the absorbent layer on the surface of underwater components. Summary of the Invention

[0010] The purpose of this invention is to provide an automatic coating and removal device and method for the absorbent layer on the surface of underwater components, so as to solve the above-mentioned problems.

[0011] To achieve the above objectives, the present invention provides the following solution:

[0012] An automatic coating and removal device for absorbent layer on the surface of underwater components, comprising:

[0013] A sealed chamber; the sealed chamber is provided with a cavity for accommodating the workpiece to be strengthened;

[0014] It also includes items fixed within the cavity:

[0015] Three-axis mobile platform;

[0016] A drainage assembly for draining water from the interior of the sealed chamber;

[0017] A dehumidifying and heating unit, which is used to remove moisture and increase the temperature inside the sealed chamber;

[0018] The detection unit is used to detect the quality of the coating on the surface of the workpiece to be strengthened;

[0019] The coating comprises a PVA layer and an absorbent layer;

[0020] A cleaning unit, located within the sealed chamber, is used to recover the stripped coating.

[0021] The movable end of the three-axis moving platform is fixedly connected to an absorption layer coating and recovery unit, which includes a PVA layer spraying section for spraying the PVA layer, an absorption layer spraying section for spraying the absorption layer, a curing section, and a solvent spraying section.

[0022] Optionally, the PVA layer coating section includes a movable end fixed to the three-axis moving platform:

[0023] Ultrasonic atomizing spray nozzle;

[0024] An ultrasonic generator is connected to the ultrasonic atomizing spray nozzle, and the ultrasonic generator causes the ultrasonic atomizing spray nozzle to vibrate, causing the ultrasonic atomizing spray nozzle to spray out a mist of liquid.

[0025] The PVA liquid pump is connected at one end to the ultrasonic atomizing spray nozzle, and at the other end to the PVA liquid pump storage tank.

[0026] Optionally, the absorbent layer spraying portion includes a component fixed to the movable end of the three-axis moving platform:

[0027] Electromagnetic injection head;

[0028] An electromagnetic flow meter, one end of which is connected to the electromagnetic jet head;

[0029] A liquid absorption layer storage tank, one end of which is connected to the other end of the electromagnetic flowmeter;

[0030] An air compressor is connected to the other end of the liquid absorption layer storage tank and the electromagnetic injection head.

[0031] Optionally, the curing unit includes an ultraviolet curing lamp fixed to the movable end of the triaxial moving platform.

[0032] Optionally, the solvent spraying section includes a component fixed to the movable end of the three-axis moving platform:

[0033] Solvent spray arm;

[0034] The solvent storage tank is connected to the solvent spraying arm via a delivery pump.

[0035] Optionally, the drainage assembly includes an inert gas valve and a drain check valve. The inert gas valve is fixed inside the cavity, and the cavity is connected to an inert gas storage tank through the inert gas valve and an air pump. The drain check valve is located on one side of the bottom of the sealed chamber.

[0036] Optionally, the dehumidification heating unit includes a hot air circulation module fixed in the cavity, the hot air circulation module comprising a heating wire, a fan and a water absorption structure.

[0037] Optionally, the detection unit includes a detection device fixed within the cavity, wherein the detection device is a camera.

[0038] Optionally, the cleaning unit includes a recycling module fixed inside the cavity and a water inlet valve located at the top of the sealed chamber.

[0039] A method of using an automatic coating and removal device for an absorbent layer on the surface of an underwater component, comprising:

[0040] Methods for applying coatings to component surfaces and methods for removing coatings from component surfaces;

[0041] The steps of the component surface coating method include:

[0042] The sealed chamber is moved above the workpiece to be strengthened and covered, allowing the workpiece to enter the cavity, and the sealed chamber isolates the cavity from the marine environment.

[0043] The drainage assembly is used to remove seawater from the sealed chamber; at the same time, the dehumidification and heating unit is used to remove moisture from the cavity and increase the temperature inside the cavity.

[0044] The three-axis moving platform moves along a preset trajectory, while the PVA layer is sprayed onto the surface of the workpiece by the PVA layer spraying part.

[0045] After the PVA layer is sprayed, the three-axis moving platform moves along a preset trajectory to drive the absorption layer spraying part to move and spray the absorption layer onto the surface of the PVA layer; the curing part is used to cure the absorption layer.

[0046] The detection unit is activated to check the coating quality. Once the quality is confirmed to be acceptable, the device is removed.

[0047] The steps of the method for removing coatings from component surfaces include:

[0048] The sealing chamber is moved over and covers the reinforced workpiece, allowing the reinforced workpiece to enter the cavity, and the sealing chamber isolates the cavity from the marine environment.

[0049] Use the drainage assembly to remove seawater from the sealed chamber;

[0050] The three-axis moving platform moves along a preset trajectory, driving the solvent spraying unit to move and spray solvent onto the absorption layer to peel off the absorption layer on the workpiece surface;

[0051] The cavity is filled with seawater through the cleaning section, and the seawater in the cavity is filtered by the cleaning section to achieve the recovery of the absorption layer.

[0052] Compared with the prior art, the present invention has the following advantages and technical effects:

[0053] In use, this device has two operating modes: a coating mode for the component surface and a coating removal mode. In coating mode, the sealed chamber is moved above the workpiece to be strengthened, creating an environment isolated from the ocean. A drainage assembly removes seawater from the sealed chamber, while a dehumidifying and heating unit removes moisture from the cavity and raises the cavity temperature. A three-axis moving platform moves along a preset trajectory, sequentially spraying the PVA layer, absorbent layer, and curing unit to apply the PVA layer and absorbent layer, followed by curing. The coating quality is checked by an inspection unit, and the device is removed after confirmation of quality. In removal mode, the sealed chamber is moved above the strengthened workpiece, creating an environment isolated from the ocean. A drainage assembly removes seawater from the sealed chamber. The three-axis moving platform moves along a preset trajectory, driving a solvent spraying unit to spray solvent onto the absorbent layer, thus peeling off the absorbent layer from the workpiece surface. A cleaning unit fills the cavity with seawater and filters the seawater within the cavity to recover the absorbent layer.

[0054] Compared with existing technologies, this invention is adapted to harsh underwater processing environments, and the coating and removal of the absorbent layer are fully automated, resulting in higher processing efficiency than traditional manual coating and removal, uniform thickness, and less likelihood of bubble formation. Furthermore, by integrating in-situ coating, curing, and dissolution, it solves the problem of secondary damage to components caused by traditional disassembly and remand operations. After the absorbent layer is peeled off, a cleaning module is used to recover waste, protecting the environment. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 This is a schematic diagram of the structure of the present invention;

[0057] Figure 2 This is a flowchart illustrating the process of the component surface coating method of the present invention;

[0058] Figure 3 This is a flowchart illustrating the process of the component surface coating removal method of the present invention.

[0059] The components include: 1. Air compressor; 2. Liquid absorption layer storage tank; 3. Electromagnetic flow meter; 4. Ultrasonic atomizing spray nozzle; 5. Electromagnetic spray head; 6. Ultraviolet curing lamp; 7. Solvent spray arm; 8. Inert gas valve; 9. Hot air circulation module; 11. PLC controller; 12. Recycling module; 13. Three-axis moving platform; and 14. Detection device. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0062] Reference Figures 1 to 3 This invention discloses an automatic coating and removal device for an absorbent layer on the surface of underwater components, comprising:

[0063] Sealed chamber; the sealed chamber contains a cavity for accommodating the workpiece to be strengthened;

[0064] Also includes those fixed within the cavity:

[0065] Three-axis mobile platform 13;

[0066] Drainage assembly, used for draining water from inside the sealed chamber;

[0067] Dehumidification and heating section: The dehumidification and heating section is used to remove moisture and increase the temperature inside the sealed chamber;

[0068] The inspection department is used to inspect the quality of the coating on the surface of the workpiece to be strengthened.

[0069] The coating consists of a PVA layer and an absorbent layer;

[0070] The cleaning section, located inside the sealed chamber, is used to recover the stripped coating.

[0071] The movable end of the three-axis moving platform 13 is fixedly connected to an absorption layer coating and recovery unit, which includes a PVA layer spraying section for PVA layer spraying, an absorption layer spraying section for absorption layer spraying, a curing section, and a solvent spraying section.

[0072] In use, this device has two operating modes: a coating mode for the component surface and a coating removal mode for the component surface. In coating mode, the sealed chamber is moved above the workpiece to be strengthened and covered to create an environment isolated from the ocean. The drainage component drains seawater from the sealed chamber, while the dehumidification and heating unit removes moisture from the cavity and increases the temperature inside the cavity. The three-axis moving platform 13 moves along a preset trajectory, sequentially spraying the PVA layer and the absorption layer through the PVA layer spraying unit, the absorption layer spraying unit, and the curing unit, and then curing them. The coating quality is checked by the detection unit, and the device is removed after confirmation of its quality. In removal mode, the sealed chamber is moved above the strengthened workpiece and covered to create an environment isolated from the ocean. The drainage component drains seawater from the sealed chamber. The three-axis moving platform 13 moves along a preset trajectory, driving the solvent spraying unit to spray solvent onto the absorption layer to peel off the absorption layer from the workpiece surface. The cleaning unit fills the cavity with seawater and filters the seawater in the cavity to recover the absorption layer.

[0073] Compared with existing technologies, this invention is adapted to harsh underwater processing environments, and the coating and removal of the absorbent layer are fully automated, resulting in higher processing efficiency than traditional manual coating and removal, uniform thickness, and less likelihood of bubble formation. Furthermore, by integrating in-situ coating, curing, and dissolution, it solves the problem of secondary damage to components caused by traditional disassembly and remand operations. After the absorbent layer is peeled off, a cleaning module is used to recover waste, protecting the environment.

[0074] As an optional implementation, the PVA layer coating section includes a movable end fixed to the three-axis moving platform 13:

[0075] Ultrasonic atomizing spray nozzle 4;

[0076] An ultrasonic generator is connected to the ultrasonic atomizing spray nozzle 4. The ultrasonic generator causes the ultrasonic atomizing spray nozzle 4 to vibrate, causing the ultrasonic atomizing spray nozzle 4 to spray out a mist of liquid.

[0077] The PVA liquid pump is connected at one end to the ultrasonic atomizing spray nozzle 4, and at the other end to the PVA liquid pump storage tank.

[0078] The PVA liquid pump storage tank stores PVA liquid. This invention uniquely adopts a double-layer structure of PVA layer and absorbent layer. When the PVA liquid comes into contact with water, it forms a continuous water-soluble film, and the water-residual residues in the bottom layer provide the driving force for shedding.

[0079] As an optional implementation, the absorbent layer spraying section includes a movable end fixed to the three-axis moving platform 13:

[0080] Electromagnetic injection head 5;

[0081] Electromagnetic flowmeter 3, one end of which is connected to electromagnetic jet head 5;

[0082] One end of the liquid absorption layer storage tank 2 is connected to the other end of the electromagnetic flowmeter 3;

[0083] The air compressor 1 is connected to the other end of the liquid absorption layer storage tank 2 and the electromagnetic injection head 5.

[0084] As an additional implementation, the electromagnetic jet head 5 is provided with a conical flow equalization structure.

[0085] Specifically, you can choose the electromagnetic jet head 5 with a conical flow equalization structure.

[0086] As an optional implementation, the curing unit includes an ultraviolet curing lamp 6 fixed to the movable end of the three-axis moving platform 13.

[0087] The UV curing lamp 6 contains dual light sources of 365nm and 405nm, with independent light intensity adjustment.

[0088] As an optional implementation, the solvent spraying unit includes a movable end fixed to the three-axis moving platform 13:

[0089] Solvent spray arm 7;

[0090] The solvent storage tank is connected to the solvent spray arm 7 via a delivery pump.

[0091] As an optional implementation, the drainage assembly includes an inert gas valve 8 and a drainage check valve. The inert gas valve 8 is fixed in the cavity, and the cavity is connected to an inert gas storage tank through the inert gas valve 8 and the air pump. The drainage check valve is located on one side of the bottom of the sealed chamber.

[0092] As an optional implementation, the dehumidification heating unit includes a hot air circulation module 9 fixed in the cavity, the hot air circulation module 9 including a heating wire, a fan and a water absorption structure.

[0093] The preferred water-absorbing structure is absorbent silica gel. The fan circulates air within the cavity, and the heating wire is located at the fan's outlet. The water-absorbing structure is located at the fan's inlet. The structure includes a housing for holding the absorbent silica gel and the silica gel itself. The housing has an inlet and an outlet, with the outlet connected to the fan's inlet. After passing through the absorbent silica gel, the air is guided by the fan to the heating wire for heating, thus achieving temperature rise and water removal within the cavity.

[0094] As an optional implementation, the detection unit includes a detection device 14 fixed in the cavity, and the detection device 14 is a camera.

[0095] The camera is placed on the inner wall of the cavity, above the surface of the workpiece.

[0096] As an alternative implementation, the cleaning unit includes a recycling module 12 fixed inside the cavity and a water inlet valve located at the top of the sealed chamber.

[0097] The present invention includes a sealed chamber, a liquid absorption layer storage tank 2, an air compressor 1, an electromagnetic flow meter 3, an absorption layer coating and recovery unit, a three-axis moving platform 13, an inert gas valve 8, a hot air circulation module 9, and a linear motor.

[0098] The absorption layer coating and recovery unit includes an ultrasonic atomizing nozzle 4, an electromagnetic spray head 5, an ultraviolet curing lamp 6, and a solvent spraying arm 7.

[0099] Air compressor 1 is connected to one end of liquid absorption layer storage tank 2 via a pipe. Liquid absorption layer storage tank 2 contains liquid absorption layer material.

[0100] As an additional implementation, the liquid absorbent layer material comprises 20% to 30% by mass of rosin binder and 70% to 80% by mass of flake graphite.

[0101] The other end of the liquid absorption layer storage tank 2 is connected to the electromagnetic injection head 5 through another pipeline, and an electromagnetic flow meter 3 is installed on the pipeline.

[0102] This device also includes a PLC controller 11.

[0103] The PLC controller 11 is electrically connected to the three-axis moving platform 13, air compressor 1, electromagnetic flowmeter 3, ultrasonic atomizing spray nozzle 4, electromagnetic spray head 5, ultraviolet curing lamp 6, solvent spray arm 7, inert gas valve 8, hot air circulation module 9, recovery module 12 and detection device 14 to achieve control, power supply and data collection.

[0104] After the sealed chamber completes docking with the component to be treated underwater, the three-axis moving platform 13, equipped with an ultrasonic atomizing spray nozzle 4, sprays the component surface along a preset trajectory, ensuring that the component surface is fully coated with PVA liquid as an absorption layer. Subsequently, the coating operation is carried out. The three-axis moving platform 13 simultaneously pulls the ultrasonic atomizing spray nozzle 4, electromagnetic spray head 5, ultraviolet curing lamp 6, and solvent spray arm 7 to move smoothly along a preset path. Compressed air provided by air compressor 1 and liquid absorption layer material provided by liquid absorption layer storage tank 2 are delivered to electromagnetic spray head 5. The liquid absorption layer material is sprayed onto the workpiece surface under the action of compressed air to form an absorption layer. The ultraviolet curing lamp 6 fixed at the rear end then performs ultraviolet curing. After the impact strengthening is completed, 90% pure ethanol solution is sprayed through the solvent spray arm to dissolve and peel off the absorption layer, which is then recovered through the cleaning module.

[0105] A method of using an automatic coating and removal device for an absorbent layer on the surface of an underwater component, comprising:

[0106] Methods for applying coatings to component surfaces and methods for removing coatings from component surfaces;

[0107] The steps of the component surface coating method include:

[0108] The sealed chamber is moved above the workpiece to be strengthened and covered, allowing the workpiece to enter the cavity, and the sealed chamber isolates the cavity from the marine environment.

[0109] The drainage assembly is used to remove seawater from the sealed chamber; at the same time, the dehumidification and heating unit is used to remove moisture from the cavity and increase the temperature inside the cavity.

[0110] The three-axis moving platform 13 moves along a preset trajectory, while the PVA layer is sprayed onto the surface of the workpiece by the PVA layer spraying part.

[0111] After the PVA layer is sprayed, the three-axis moving platform 13 moves along the preset trajectory to drive the absorption layer spraying part to move and spray the absorption layer on the surface of the PVA layer; the curing part is used to cure the absorption layer.

[0112] The inspection department is activated to check the coating spraying quality. Once the quality is confirmed to be acceptable, the device is removed.

[0113] The steps of the method for removing coatings from component surfaces include:

[0114] The sealed chamber is moved over and covered the reinforced workpiece, allowing the reinforced workpiece to enter the cavity, and the sealed chamber isolates the cavity from the marine environment.

[0115] Use the drainage assembly to remove seawater from the sealed compartment;

[0116] The three-axis moving platform 13 moves along a preset trajectory, driving the solvent spraying unit to move and spray solvent onto the absorption layer to peel off the absorption layer on the surface of the workpiece;

[0117] The cavity is filled with seawater through the cleaning section, and the seawater in the cavity is filtered by the cleaning section to achieve the recovery of the absorption layer.

[0118] The specific steps include:

[0119] The parameters such as the viscosity of the liquid absorption layer η, the moving speed of the electromagnetic injection head 5 v0, and the thickness of the absorption layer δ are pre-input into the PLC controller 11.

[0120] Pour liquid absorption layer material into liquid absorption layer storage tank 2, set coating parameters according to liquid viscosity, and input compressed air into electromagnetic spray head 5;

[0121] After the sealed chamber docks with the component underwater, the three-axis moving platform 13 is equipped with an ultrasonic atomizing spray nozzle 4 to spray the component surface along a preset trajectory, so that the component surface is fully coated with PVA liquid as an absorption layer of PVA layer.

[0122] The electromagnetic spray head 5 is designed according to the specific reinforcement area of ​​the underwater workpiece. The three-axis moving platform 13 descends to move the electromagnetic spray head 5 to the initial position at the edge of the area to be coated. Then, the spray nozzle is controlled to move according to the motion trajectory. After the liquid absorption layer material is coated on the area to be processed, the electromagnetic spray head 5 rises.

[0123] The three-axis moving platform 13 controls the ultraviolet curing lamp 6 to cure the absorption layer;

[0124] The testing device 14 verifies the integrity of the coating; if it passes, laser shock peening is performed.

[0125] The reinforced workpiece is re-connected, the path parameters are set, and the movement trajectory of the solvent spraying arm 7 is generated according to the specific reinforced area of ​​the part.

[0126] The three-axis moving platform 13 descends to move the solvent spraying arm 7 to the initial position at the edge of the coating area and adjusts the height to spray the ethanol solution onto the absorption layer. Then, the spraying arm is controlled to move according to the motion trajectory and the surface absorption layer is dissolved according to the set parameters. The absorption layer is then recovered and centrally processed using the recovery module 12.

[0127] Application example:

[0128] This invention relates to underwater laser shock peening of TC4 titanium alloy components for marine engineering, and the optimal conditions for adaptive absorption layer coating are as follows:

[0129] The TC4 titanium alloy was machined into a standard sample of 200mm×150mm×8mm using an underwater plasma cutting machine to simulate the size of a marine propeller blade.

[0130] An automatic absorption layer coating and removal device was used to coat the titanium alloy sample with an absorption layer. Relevant parameters were pre-input into the PLC controller: static viscosity of the liquid absorption layer 18000 cP, spray shear viscosity of the liquid absorption layer 6500 cP, electromagnetic spray head parameters, absorption layer thickness 35 μm, and electromagnetic spray head parameters: nozzle diameter 0.5 mm, moving speed 150 mm / s, overlap rate 35%, and frequency 80 Hz. After solidification, the entire surface of the part was subjected to laser shock hardening. Laser parameters were: laser power 50 W, repetition frequency 5 Hz, scanning speed 6 mm / s, and orthogonal double-pass scanning strategy.

[0131] The absorption layer of a laser-strengthened titanium alloy sample is removed using an automatic coating and removal device. This is achieved by moving a sealed chamber over and covering the reinforced workpiece, allowing the reinforced workpiece to enter the cavity, which is then isolated from the marine environment. A drainage assembly is used to drain seawater from the sealed chamber. A three-axis moving platform 13 moves along a preset trajectory, driving a solvent spraying unit to spray solvent onto the absorption layer to peel off the absorption layer from the workpiece surface. The cavity is then filled with seawater by a cleaning unit, which filters the seawater within the cavity to recover the absorption layer.

[0132] Residual stress and microhardness were tested on titanium alloy samples using an automated absorption layer coating device and scheme before and after laser strengthening, and the performance was compared with that of manually coated liquid strengthening adhesive. See Table 1.

[0133] Table 1 Comparison of effects between automatic coating and manual coating

[0134] Testing items This invention Traditional hand coating Residual compressive stress (MPa) -620±35 -480±120 Surface hardness (HV0.5) 425±18 390±45 Operation time (min) 22 65

[0135] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0136] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An automatic coating and removal device for an absorbent layer on the surface of underwater components, characterized in that, include: Sealed compartment; The sealed chamber is provided with a cavity for accommodating the workpiece to be strengthened; It also includes items fixed within the cavity: Three-axis mobile platform (13); A drainage assembly for draining water from the interior of the sealed chamber; A dehumidifying and heating unit, which is used to remove moisture and increase the temperature inside the sealed chamber; The detection unit is used to detect the quality of the coating on the surface of the workpiece to be strengthened; The coating comprises a PVA layer and an absorbent layer; A cleaning unit, located within the sealed chamber, is used to recover the stripped coating. The movable end of the three-axis moving platform (13) is fixedly connected to an absorption layer coating and recycling unit, which includes a PVA layer spraying section for spraying the PVA layer, an absorption layer spraying section for spraying the absorption layer, a curing section, and a solvent spraying section.

2. The automatic coating and removal device for the absorbent layer on the surface of underwater components according to claim 1, characterized in that, The PVA layer coating section includes a movable end fixed to the three-axis moving platform (13): Ultrasonic atomizing spray nozzle (4); An ultrasonic generator is connected to the ultrasonic atomizing spray nozzle (4) for transmission. The ultrasonic generator causes the ultrasonic atomizing spray nozzle (4) to vibrate and spray out atomized liquid. The PVA liquid pump is connected at one end to the ultrasonic atomizing spray nozzle (4), and at the other end of the PVA liquid pump is connected to the PVA liquid pump storage tank.

3. The automatic coating and removal device for the absorbent layer on the surface of underwater components according to claim 1, characterized in that, The absorbent layer spraying section includes a movable end fixed to the three-axis moving platform (13): Electromagnetic jet head (5); An electromagnetic flowmeter (3) is connected at one end to the electromagnetic jet head (5); The liquid absorption layer storage tank (2) is connected at one end to the other end of the electromagnetic flowmeter (3); An air compressor (1) is connected to the other end of the liquid absorption layer storage tank (2) and the electromagnetic injection head (5).

4. The automatic coating and removal device for the absorbent layer on the surface of underwater components according to claim 1, characterized in that, The curing unit includes an ultraviolet curing lamp (6) fixed to the movable end of the three-axis moving platform (13).

5. The automatic coating and removal device for the absorbent layer on the surface of underwater components according to claim 1, characterized in that, The solvent spraying section includes a movable end fixed to the three-axis moving platform (13): Solvent spray arm (7); The solvent storage tank is connected to the solvent spray arm (7) via a delivery pump.

6. The automatic coating and removal device for the absorbent layer on the surface of underwater components according to claim 1, characterized in that: The drainage assembly includes an inert gas valve (8) and a drain check valve. The inert gas valve (8) is fixed inside the cavity. The cavity is connected to an inert gas storage tank through the inert gas valve (8) and an air pump. The drain check valve is located on one side of the bottom of the sealed chamber.

7. The automatic coating and removal device for the absorbent layer on the surface of underwater components according to claim 1, characterized in that: The dehumidification heating unit includes a hot air circulation module (9) fixed in the cavity, and the hot air circulation module (9) includes a heating wire, a fan and a water absorption structure.

8. The automatic coating and removal device for the absorbent layer on the surface of underwater components according to claim 1, characterized in that: The detection unit includes a detection device (14) fixed in the cavity, and the detection device (14) is a camera.

9. The automatic coating and removal device for the absorbent layer on the surface of underwater components according to claim 1, characterized in that: The cleaning unit includes a recycling module (12) fixed inside the cavity and a water inlet valve located on the top of the sealed chamber.

10. A method of using an automatic coating and removal device for an absorbent layer on the surface of an underwater component, comprising using the automatic coating and removal device for an absorbent layer on the surface of an underwater component as described in any one of claims 1-9, characterized in that, include: Methods for applying coatings to component surfaces and methods for removing coatings from component surfaces; The steps of the component surface coating method include: The sealed chamber is moved above the workpiece to be strengthened and covered, allowing the workpiece to enter the cavity, and the sealed chamber isolates the cavity from the marine environment. The drainage assembly is used to remove seawater from the sealed chamber; at the same time, the dehumidification and heating unit is used to remove moisture from the cavity and increase the temperature inside the cavity. The three-axis moving platform (13) moves along a preset trajectory, while the PVA layer is sprayed onto the surface of the workpiece by the PVA layer spraying part; After the PVA layer is sprayed, the three-axis moving platform (13) moves along a preset trajectory to drive the absorption layer spraying part to move and spray the absorption layer on the surface of the PVA layer; the curing part is used to cure the absorption layer; The detection unit is activated to check the coating quality. Once the quality is confirmed to be acceptable, the device is removed. The steps of the method for removing coatings from component surfaces include: The sealing chamber is moved over and covers the reinforced workpiece, allowing the reinforced workpiece to enter the cavity, and the sealing chamber isolates the cavity from the marine environment. Use the drainage assembly to remove seawater from the sealed chamber; The solvent spraying unit moves along a preset trajectory, driven by the three-axis moving platform (13), and sprays solvent onto the absorption layer to peel off the absorption layer on the surface of the workpiece; The cavity is filled with seawater through the cleaning section, and the seawater in the cavity is filtered by the cleaning section to achieve the recovery of the absorption layer.

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