Water-light coaxial laser shock peening device and method

Abstract

The invention discloses a water-light coaxial laser shock peening device and method, and the device comprises a laser generation unit which is used for outputting a pulse laser beam; the light beam transmitting and focusing unit is coupled with a light path of the laser generating unit and is used for guiding and focusing the laser beam to the surface of the to-be-strengthened workpiece; a deionized water column is formed in the high-pressure-resistant water-light coaxial transmission unit and is coaxial with the laser beam, and the high-pressure-resistant water-light coaxial transmission unit is used for guiding the laser beam to the surface of the workpiece to be strengthened by taking the deionized water column as a laser transmission medium; the water pressure regulation and control unit is in fluid communication with the high-pressure-resistant water-light coaxial transmission unit and is used for regulating and maintaining the pressure of the deionized water column; and the dynamic water restraint layer thickness control unit is arranged at the outlet end of the high-pressure-resistant water-light coaxial transmission unit and used for forming a uniform water restraint layer with the controllable thickness on the surface of the workpiece to be strengthened in real time. A stable and uniform water restraint layer can be formed on the surface of the workpiece, meanwhile, the laser shock pressure can be enhanced, and the double strengthening effect of water shock-laser shock coupling is achieved.

Description

Technical Field

[0001] This invention belongs to the field of laser shock peening technology, and particularly relates to a water-optical coaxial laser shock peening device and method. Background Technology

[0002] Laser shock peening (LSP) is a strengthening method that induces severe plastic deformation on the surface of metallic materials. It is characterized by four key features: high pressure, high energy, ultrafast speed, and ultra-high strain rate, making it suitable for strengthening material surfaces under extreme conditions. By forming a residual compressive stress layer and a gradient refinement layer structure exceeding 1 mm on the material surface, the service life of critical components can be significantly extended.

[0003] With the development of laser shock peening technology, it is being applied to an increasing number of scenarios. my country's marine industry is in a period of continuous development, and large equipment such as offshore drilling platforms, ocean-going cargo ships, and offshore wind turbines are facing increasingly stringent performance requirements for key components. These critical components are often immersed in seawater environments for extended periods, necessitating higher corrosion resistance and fatigue resistance to meet the demands of long-term safe operation in corrosive seawater conditions. Surface treatment technology can form a refined grain layer on the material surface, thereby ensuring the corrosion resistance and fatigue strength of key components in seawater environments, ultimately improving the overall service life of the equipment.

[0004] Due to the large size and complex structure of marine equipment, surface strengthening of individual components often needs to be carried out on-site. Previously, traditional fixed laser shock peening equipment often required the component to be strengthened to be removed, which greatly increased equipment downtime and disassembly workload, significantly raising the strengthening cost. However, the complex underwater environment presents a severe challenge to underwater laser shock peening. The complex seawater environment significantly reduces laser transmission efficiency, resulting in severe losses and thus reducing the strengthening effect, leading to insignificant improvements in the component's fatigue resistance and corrosion resistance.

[0005] Therefore, in order to expand the application of laser shock peening in key marine equipment and reduce the cost of laser shock peening of key components, it is necessary to develop laser shock peening in-situ strengthening devices and methods for complex aquatic environments to improve the effect and reliability of underwater laser shock peening. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a coaxial laser shock peening device for water-optical interaction, comprising: Laser generating unit, used to output pulsed laser beam; The beam transmission and focusing unit is optically coupled to the laser generating unit and is used to guide and focus the laser beam onto the surface of the workpiece to be strengthened. A high-pressure resistant water-optical coaxial transmission unit has an internal deionized water column that is coaxial with the laser beam, and is used to guide the laser beam to the surface of the workpiece to be strengthened by using the deionized water column as a laser transmission medium. The water pressure regulation unit is in fluid communication with the high-pressure resistant water-optical coaxial transmission unit and is used to regulate and maintain the pressure of the deionized water column; A dynamic water constraint layer thickness control unit is set at the outlet end of the high-pressure resistant hydro-optic coaxial transmission unit to form a uniform water constraint layer with controllable thickness on the surface of the workpiece to be strengthened in real time. The central control unit is signal-connected to the laser generating unit, the water pressure regulating unit, and the dynamic water constraint layer thickness control unit. It is used to synchronously adjust the laser parameters and water pressure parameters according to the feedback of the water constraint layer thickness in order to achieve laser shock enhancement.

[0007] Optionally, the beam transmission and focusing unit includes a total reflection mirror, a focusing mirror, and a light transmission mirror. The focusing mirror is installed at the inlet end of the high-pressure water-light coaxial transmission unit and is sealed and isolated from the deionized water column through the light transmission mirror.

[0008] Optionally, the water pressure control unit includes a water storage tank, a pressurizer, and a pressure gauge. The pressurizer pumps deionized water from the water storage tank into the high-pressure resistant water-optical coaxial transmission unit. The pressure gauge detects the pressure inside the pipe in real time and feeds the signal back to the central control unit to form a closed-loop pressure control.

[0009] Optionally, the dynamic water confinement layer thickness control unit includes: The outer shell is connected, and the hollow interior forms an axially continuous cavity; The sealing ring fixing circlip and the spring fixing circlip are respectively fixed in the through cavity through grooves; A sealing ring is installed between the sealing ring fixing circlip and the spring fixing circlip; A transparent pressure plate passes through the center of the connecting housing, and its upper section is sealed by the sealing ring. A thrust retaining ring is fixed to the middle section of a transparent pressure plate via a groove. A spring, abutting between the spring retaining circlip and the thrust circlip, is used to provide an elastic restoring force toward the surface of the workpiece to be strengthened; A linear sensor, fixed to the connecting housing and coupled to the transparent pressure plate, is used to output the axial displacement signal of the transparent pressure plate in real time.

[0010] The present invention also provides a water-optical coaxial laser shock peening method, based on the aforementioned device, comprising the following steps: Position the outlet end of the device above the surface of the workpiece to be strengthened, and make the transparent water pressure plate fit against the surface of the workpiece to be strengthened. Start the water pressure control unit, and at the same time establish a deionized water column in the high-pressure water-optical coaxial transmission unit and make the water column coaxial with the laser beam; A water constraint layer with uniform thickness and real-time controllability is formed on the workpiece surface by a dynamic water constraint layer thickness control unit. The central control unit calculates the optimal laser parameters based on the thickness and material properties of the water-constrained layer, and drives the laser generating unit to emit a pulsed laser beam. The laser beam is then transmitted along the deionized water column and focused onto the surface of the workpiece to be strengthened, generating a laser shock wave to strengthen the workpiece.

[0011] Optionally, the process of forming a uniform and real-time controllable water constraint layer on the workpiece surface using a dynamic water constraint layer thickness control unit includes: The offset of the transparent pressure plate is measured in real time using a linear sensor and used as the water film thickness value. If the measured thickness is greater than the preset value, reduce the power of the pressurizer to reduce the water film thickness; If the measured thickness is less than the preset value, increase the power of the pressure booster to increase the water film thickness; Repeat the above steps until the water film thickness stabilizes at the preset value, forming a water-constrained layer of uniform thickness.

[0012] Optionally, the optimal laser parameters include laser energy, spot diameter, and pulse frequency.

[0013] The present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method.

[0014] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method.

[0015] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the method.

[0016] Compared with the prior art, the present invention has the following advantages and technical effects: 1. This invention can guarantee laser transmission quality in complex aquatic environments. Seawater environments are complex, containing numerous impurities and bubbles. Direct transmission of a laser beam in seawater results in significant attenuation and severe energy loss. This invention utilizes a coaxial water-optical method, employing a deionized water column to transmit the laser beam, achieving reliable transmission in seawater environments and possessing irreplaceable advantages.

[0017] 2. This invention achieves the maintenance of a uniform water confinement layer in an underwater environment. During laser shock peening, a water confinement layer needs to be sprayed. A uniform and stable water confinement layer can improve the laser shock peening effect. This invention, through a dynamic water confinement layer thickness control unit, can obtain a uniform and stable water confinement in an underwater environment.

[0018] 3. This invention enhances the strengthening effect of underwater laser shock blasting. High-pressure water jets scouring the workpiece surface create impact pressure, resulting in surface strengthening. This invention couples the water jet impact pressure with laser shock blasting, creating greater impact pressure on the workpiece surface and significantly improving the laser shock blasting effect. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the water-optical coaxial laser shock blasting device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the dynamic water constraint layer thickness control unit according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the dynamic water constraint layer thickness control unit forming a uniform water film on the workpiece surface according to an embodiment of the present invention; Figure 4 This is a comparison diagram of the residual stress distribution in the thickness direction of TC4 titanium alloy samples subjected to laser shock strengthening in the traditional water flow constraint mode and the water-light coaxial mode, according to an embodiment of the present invention. The components include: 1. Laser; 2. Total reflection mirror; 3. Focusing mirror; 4. Transmitting mirror; 5. High-pressure resistant tube; 6. Pressure gauge; 7. Dynamic water constraint layer thickness control unit; 701. Connecting shell; 702. Sealing ring fixing circlip; 703. Sealing ring; 704. Spring fixing circlip; 705. Spring; 706. Thrust circlip; 707. Transparent water pressure plate; 8. Linear sensor; 9. Workpiece to be strengthened; 10. Water storage tank; 11. Pressurizer; 12. Computer. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0022] Example 1 like Figure 1 As shown, this embodiment provides a coaxial laser shock peening device for water-optical interaction, comprising: Laser generating unit, used to output pulsed laser beam; The beam transmission and focusing unit is optically coupled to the laser generating unit and is used to guide and focus the laser beam onto the surface of the workpiece to be strengthened. A high-pressure resistant water-optical coaxial transmission unit has an internal deionized water column that is coaxial with the laser beam, and is used to guide the laser beam to the surface of the workpiece to be strengthened by using the deionized water column as a laser transmission medium. The water pressure regulation unit is in fluid communication with the high-pressure resistant water-optical coaxial transmission unit and is used to regulate and maintain the pressure of the deionized water column; The dynamic water constraint layer thickness control unit 7 is located at the outlet end of the high-pressure resistant water-optical coaxial transmission unit and is used to form a uniform water constraint layer with controllable thickness on the surface of the workpiece to be strengthened in real time. The central control unit is signal-connected to the laser generating unit, the water pressure regulating unit, and the dynamic water constraint layer thickness control unit. It is used to synchronously adjust the laser parameters and water pressure parameters according to the feedback of the water constraint layer thickness in order to achieve laser shock enhancement.

[0023] It is feasible that the laser generating unit uses laser 1 to emit laser light.

[0024] In practice, the beam transmission and focusing unit includes a total reflection mirror 2, a focusing mirror 3, and a light transmission mirror 4. The focusing mirror 3 is installed at the inlet end of the high-pressure water-light coaxial transmission unit and is sealed and isolated from the deionized water column through the light transmission mirror 4.

[0025] It is feasible that the high-pressure resistant water-optical coaxial transmission unit adopts a high-pressure resistant tube 5, and a deionized water column is formed in the high-pressure resistant tube 5.

[0026] The water pressure control unit includes a water storage tank 10, a pressurizer 11, and a pressure gauge 6. The pressurizer 11 pumps deionized water from the water storage tank 10 into the high-pressure resistant water-optical coaxial transmission unit. The pressure gauge 6 detects the pressure inside the pipe in real time and feeds the signal back to the central control unit to form a closed-loop pressure control.

[0027] In practice, the central control unit is a computer 12, which is connected to the laser 1, the pressurizer 11, the pressure gauge 6 and the dynamic water confinement layer thickness control unit 7.

[0028] As a feasible example, the laser 1 of the device generates a laser beam, which is reflected by a total reflection mirror 2 and reaches the end laser impact head. The upper part of the end laser impact head includes a focusing mirror 3, which focuses the output parallel laser beam. The end laser head also includes a high-pressure resistant tube 5, which is isolated from the focusing mirror 3 by a light-transmitting mirror 4. The left end of the high-pressure resistant tube 5 is connected to a pressure booster 11 via a water pipe, the right end is connected to a pressure gauge 6, and the lower end is connected to a dynamic water constraint layer thickness control unit 7. Deionized water is stored in a water tank 10, input into the high-pressure resistant tube 5 through the pressure booster 11, and finally sprayed onto the surface of the workpiece 9 to be strengthened through the dynamic water constraint layer thickness control unit 7. A computer 12 is connected to the laser 1, the pressure booster 11, the pressure gauge 6, and the dynamic water constraint layer thickness control unit 7. By detecting the reading of the pressure gauge 6, the internal water pressure of the high-pressure resistant tube 5 is obtained, thereby adjusting the operating parameters of the pressure booster 11 to maintain stable internal water pressure.

[0029] like Figure 2 As shown, the main body of the dynamic water constraint layer thickness control unit 7 is a connecting shell 701, which is hollow inside and has a sealing ring fixing spring 702 and a spring fixing spring 704 installed through grooves. A sealing ring 703 is installed between the sealing ring fixing spring 702 and the spring fixing spring 704. A transparent water pressure plate 707 passes through the center of the connecting shell 701, and a thrust spring 706 is fixed in the middle section of the transparent water pressure plate 707 through a groove. A spring 705 is installed between the thrust spring 706 and the spring fixing spring 704, and the upper section of the transparent water pressure plate 707 is sealed by the sealing ring 703. A linear sensor 8 is connected to the connecting shell 701 and can be used to monitor the position information of the transparent water pressure plate 707.

[0030] This embodiment also provides a water-optical coaxial laser shock peening method, based on the aforementioned device, comprising the following steps: During laser shock peening, a transparent pressure plate 707 is pressed tightly against the workpiece surface, and a high-pressure resistant pipe 5 is fixed so that it remains relatively stationary with respect to the workpiece surface. The pressurizer 11 starts operating, pumping deionized water into the high-pressure resistant pipe 5. As the pressure of the deionized water in the high-pressure resistant pipe 5 increases, the deionized water is ejected from the center of the transparent pressure plate 707 through the dynamic water constraint layer thickness control unit 7. Because the transparent pressure plate 707 and the workpiece 9 to be strengthened are in close contact, the water pressure pushes the transparent pressure plate 707 upwards, maintaining balance under the action of the spring 705. Due to the upward shift of the transparent pressure plate 707, a uniform gap is formed between the transparent pressure plate 707 and the workpiece 9 to be strengthened, and the deionized water seeps into the gap, forming a uniform water film covering the surface of the workpiece 9. The linear sensor 8 can detect the upward shift distance of the transparent pressure plate 707, thereby indirectly determining the water constraint layer thickness. The water constraint layer thickness data is input into the computer 12, which calculates the optimal processing parameters and then adjusts the power of the laser 1. Laser 1 emits a laser beam, which is on the same axis as the deionized water column in the high-voltage tube 5. The laser beam is transmitted along the deionized water column and finally focused on the surface of the workpiece 9 to be strengthened, forming a laser shock wave.

[0031] To achieve the above effects, the high-pressure resistant tube 5 and the focusing lens 3 are further isolated by a light-transmitting lens 4, and the connection is waterproofed. The connecting housing 701 and the high-pressure resistant tube 5 are connected by pipe threads and sealed with PTFE tape. The transparent pressure plate 707 and the connecting housing 701 are sealed with a sealing ring 703.

[0032] like Figure 3 As shown, the dynamic water constraint layer thickness control method is as follows: When the transparent pressure plate 707 is in close contact with the surface of the workpiece 9 to be strengthened, the high-pressure resistant pipe 5 is fixed. At this time, the measurement value of the linear sensor 8 returns to zero, which is recorded as the initial position. When the water pressure inside the high-pressure pipe 5 increases, a water film forms between the workpiece 9 to be strengthened and the transparent pressure plate 707. The water pressure pushes the transparent pressure plate 707 upward, and at this time the linear sensor 8 measures the offset value of the transparent pressure plate 707 and inputs it into the computer 12; After obtaining the offset value of the transparent pressure plate 707, the computer 12 obtains the water film thickness value. The computer 12 then compares this value with the pre-set water film thickness value. When the actual thickness of the water film is greater than the preset value, the computer 12 controls the power of the pressurizer 11 to decrease, thereby reducing the water pressure in the high-pressure pipe 5. At this time, the transparent water pressure plate 707 is pushed downward by the spring 705, and the thickness of the water film decreases. When the actual thickness of the water film is less than the preset value, the computer 12 controls the pressurizer 11 to increase the power, thereby increasing the water pressure in the high-pressure pipe 5. The water pressure pushes the transparent pressure plate 707 upward, and the water film thickness increases. Computer 12 monitors the measured value of linear sensor 8 in real time and continuously adjusts the power of pressurizer 11 until the measured value of linear sensor 8 stabilizes, thereby forming a water-constrained layer with uniform thickness and stability.

[0033] Furthermore, the pressurized water jet impacts the workpiece surface and couples with the laser shock, significantly enhancing the impact effect.

[0034] Furthermore, the optimal laser parameters include laser energy, spot diameter, and pulse frequency.

[0035] This embodiment can be used for laser shock peening in complex aquatic environments. By employing a hollow, high-pressure-resistant pipe with built-in deionized water, the laser beam and the deionized water column are aligned on the same axis. Therefore, the laser beam can propagate along the deionized water column, forming a good laser transmission path at the terminal and ensuring the transmission quality of the beam in complex underwater environments. This embodiment can also form a stable and uniform water-constrained layer on the workpiece surface. Simultaneously, the high-pressure jetting of deionized water enhances the laser shock pressure, creating a dual strengthening effect of water-shock and laser-shock coupling.

[0036] Example 2 The application of the coaxial laser shock peening device proposed in Example 1 on TC4 titanium alloy includes the following steps: A TC4 titanium alloy plate measuring 100mm × 100mm × 5mm is fixed on a CNC workbench located 1m underwater. A transparent pressure plate 707 is placed tightly against the workpiece surface, and a high-pressure resistant pipe 5 is fixed so that it remains relatively stationary with respect to the workpiece surface. The pressurizer 11 starts operating, pumping deionized water into the high-pressure resistant pipe 5. As the pressure of the deionized water in the high-pressure resistant pipe 5 increases, the deionized water is ejected from the center of the transparent pressure plate 707 through the dynamic water constraint layer thickness control unit 7. Due to the tight contact between the transparent pressure plate 707 and the TC4 titanium alloy plate, the water pressure pushes the transparent pressure plate 707 upwards, maintaining balance under the action of the spring 705. As the transparent pressure plate 707 shifts upwards, a uniform gap is formed between the transparent pressure plate 707 and the workpiece 9 to be strengthened. The deionized water penetrates the gap, forming a uniform water film covering the surface of the TC4 titanium alloy plate.

[0037] The water constraint layer thickness is set on computer 12 to 3mm. Based on the water film thickness value fed back by the dynamic water constraint layer thickness control unit 7, computer 12 dynamically adjusts the power of pressurizer 11 to maintain the water constraint layer thickness at the predetermined value. Based on the water constraint layer thickness data, pressure gauge 6 reading, and workpiece material, computer 12 calculates the optimal processing parameters and then adjusts the power and parameters of laser 1, specifically: laser energy of 12J, spot diameter of 3mm, and frequency of 1Hz.

[0038] Laser 1 emits a laser beam that is aligned with the deionized water column in the high-pressure tube 5. The laser beam travels along the deionized water column and is finally focused on the surface of the titanium alloy plate to be strengthened, forming a laser shock wave. The CNC worktable and laser 1 work together to move the titanium alloy plate to complete the laser shock strengthening of the predetermined area. After the laser shock strengthening is completed, laser 1, CNC platform, pressure device 11, and computer 12 are turned off in sequence. The strengthened sample is then removed from the CNC platform and wiped clean.

[0039] The residual stress distribution along the thickness direction of TC4 titanium alloy samples strengthened by coaxial laser shock irradiation was measured using an X-350 A-type X-ray diffraction system, and compared with that of TC4 titanium alloy samples strengthened by laser shock irradiation under conventional water confinement mode. Figure 4 As shown, the maximum residual compressive stress on the sample surface after coaxial laser shock peening reached -900 MPa, an increase of 100 MPa compared to the traditional water-constrained mode. Furthermore, the depth of the residual compressive stress layer was also greater than that under the traditional water-constrained mode, increasing from 1.2 mm to 1.8 mm. Therefore, the overall residual compressive stress of the sample was significantly improved after adopting the coaxial laser shock peening method, and the depth of the residual compressive stress layer was also greater.

[0040] Example 3 This embodiment also discloses a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method described in Embodiment 1.

[0041] Example 4 This embodiment also discloses a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the method described in Embodiment 1.

[0042] Example 5 This embodiment also discloses a computer program product, including a computer program that, when executed by a processor, implements the steps of the method described in Embodiment 1.

[0043] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A coaxial laser shock peening device for water-optical interaction, characterized in that, include: Laser generating unit, used to output pulsed laser beam; The beam transmission and focusing unit is optically coupled to the laser generating unit and is used to guide and focus the laser beam onto the surface of the workpiece to be strengthened. A high-pressure resistant water-optical coaxial transmission unit has an internal deionized water column that is coaxial with the laser beam, and is used to guide the laser beam to the surface of the workpiece to be strengthened by using the deionized water column as a laser transmission medium. The water pressure regulation unit is in fluid communication with the high-pressure resistant water-optical coaxial transmission unit and is used to regulate and maintain the pressure of the deionized water column; A dynamic water constraint layer thickness control unit is set at the outlet end of the high-pressure resistant hydro-optic coaxial transmission unit to form a uniform water constraint layer with controllable thickness on the surface of the workpiece to be strengthened in real time. The central control unit is signal-connected to the laser generating unit, the water pressure regulating unit, and the dynamic water constraint layer thickness control unit. It is used to synchronously adjust the laser parameters and water pressure parameters according to the feedback of the water constraint layer thickness in order to achieve laser shock enhancement.

2. The apparatus according to claim 1, characterized in that, The beam transmission and focusing unit includes a total reflection mirror, a focusing mirror, and a light transmission mirror. The focusing mirror is installed at the inlet end of the high-pressure water-light coaxial transmission unit and is sealed and isolated from the deionized water column through the light transmission mirror.

3. The apparatus according to claim 1, characterized in that, The water pressure control unit includes a water storage tank, a pressurizer, and a pressure gauge. The pressurizer pumps deionized water from the water storage tank into the high-pressure resistant water-optical coaxial transmission unit. The pressure gauge detects the pressure inside the pipe in real time and feeds the signal back to the central control unit to form a closed-loop pressure control.

4. The apparatus according to claim 1, characterized in that, The dynamic water confinement layer thickness control unit includes: The outer shell is connected, and the hollow interior forms an axially continuous cavity; The sealing ring fixing circlip and the spring fixing circlip are respectively fixed in the through cavity through grooves; A sealing ring is installed between the sealing ring fixing circlip and the spring fixing circlip; A transparent pressure plate passes through the center of the connecting housing, and its upper section is sealed by the sealing ring. A thrust retaining ring is fixed to the middle section of a transparent pressure plate via a groove. A spring, abutting between the spring retaining circlip and the thrust circlip, is used to provide an elastic restoring force toward the surface of the workpiece to be strengthened; A linear sensor, fixed to the connecting housing and coupled to the transparent pressure plate, is used to output the axial displacement signal of the transparent pressure plate in real time.

5. A method for coaxial laser shock peening of water and light, characterized in that, The apparatus according to any one of claims 1-4 includes the following steps: Position the outlet end of the device above the surface of the workpiece to be strengthened, and make the transparent water pressure plate fit against the surface of the workpiece to be strengthened. Start the water pressure control unit, and at the same time establish a deionized water column in the high-pressure water-optical coaxial transmission unit and make the water column coaxial with the laser beam; A water constraint layer with uniform thickness and real-time controllability is formed on the workpiece surface by a dynamic water constraint layer thickness control unit. The central control unit calculates the optimal laser parameters based on the thickness and material properties of the water-constrained layer, and drives the laser generating unit to emit a pulsed laser beam. The laser beam is then transmitted along the deionized water column and focused onto the surface of the workpiece to be strengthened, generating a laser shock wave to strengthen the workpiece.

6. The method according to claim 5, characterized in that, The process of forming a uniform and real-time controllable water constraint layer on the workpiece surface using a dynamic water constraint layer thickness control unit includes: The offset of the transparent pressure plate is measured in real time using a linear sensor and used as the water film thickness value. If the measured thickness is greater than the preset value, reduce the power of the pressurizer to reduce the water film thickness; If the measured thickness is less than the preset value, increase the power of the pressure booster to increase the water film thickness; Repeat the above steps until the water film thickness stabilizes at the preset value, forming a water-constrained layer of uniform thickness.

7. The method according to claim 5, characterized in that, The optimal laser parameters include laser energy, spot diameter, and pulse frequency.

8. A computer device comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the method of claim 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method of claim 5.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method of claim 5.

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