A laser shock peening device and method

Abstract

The application discloses a kind of laser shock peening device and method, including fixed platform, support being set on fixed platform, laser device, first gas lance, first gas cylinder and resistance heating wire, laser beam is emitted by laser device, first gas lance is simultaneously set on support, first gas cylinder is connected with one end of first gas lance, nitrogen or carbon dioxide is stored in first gas cylinder, resistance heating wire is arranged in the position of the spout of first gas lance, the surface of test piece is heated by resistance heating wire, nitrogen or carbon dioxide gas is sprayed by first gas lance, nitriding or carburizing is carried out on test piece at high temperature, first gas lance and resistance heating wire are used to more conveniently and simply carburize or nitride test piece, and the effect of laser shock peening can be improved under the action of resistance heating wire, the above device is simple to operate, and processing efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the field of laser shock peening technology, specifically to a laser shock peening device and method. Background Technology

[0002] Laser shock peening (LSP) is a method used to improve the fatigue life and surface wear resistance of components. To achieve high surface hardness and wear resistance during LSP, heat treatment processes such as nitriding, carburizing, or carbonitriding are typically used. In LSP, LSP and nitriding / carburizing are two independent processes. Specifically, the specimen is moved into a carburizing or nitriding chamber, heated, and then infused with nitrogen or carbon dioxide for carburizing or nitriding. After completion, it is removed for LSP. The above process is complex, time-consuming, and labor-intensive, impacting processing efficiency.

[0003] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a laser shock strengthening device and method, which aims to solve the problems of complex operation and reduced processing efficiency in existing laser shock strengthening and nitriding / carburizing processes.

[0005] The technical solution adopted by this invention to solve the technical problem is as follows:

[0006] A laser shock peening device includes a fixed platform and a support mounted on the fixed platform, characterized in that it further includes:

[0007] A laser device is disposed on one side of the support, and the laser device is used to emit a laser beam and irradiate the specimen corresponding to the laser device;

[0008] The first gas spray gun is rotatably mounted on the support near the specimen and located below the laser device. The position where the first gas spray gun sprays onto the surface of the specimen overlaps with the position where the laser beam of the laser device irradiates the surface of the specimen.

[0009] The first gas cylinder is located on one side of the bracket, and the first gas cylinder is connected to the first gas spray gun through a pipe.

[0010] A resistance heating wire is positioned at the nozzle of the first gas spray gun.

[0011] Furthermore, a second gas spray gun is provided on one side of the bracket and is located on the side of the bracket where the first gas spray gun is provided. The second gas spray gun is located on the top of the laser device. A second gas cylinder is provided on one side of the bracket, and the second gas cylinder is connected to the second gas spray gun through a pipe.

[0012] Furthermore, the second gas cylinder contains liquefied nitrogen or liquefied carbon dioxide, and an electric heater is installed inside the second gas cylinder.

[0013] Furthermore, a nozzle is provided on one side of the bracket, located on the side where the first gas spray gun is located, and a liquid storage bottle is provided on one side of the bracket, with an electric heater installed inside the liquid storage bottle.

[0014] Furthermore, a robotic arm is provided on the fixed platform, and an upper clamp and a lower clamp are slidably provided on one side of the robotic arm. The upper clamp and the lower clamp are symmetrical to each other, and the specimen is fixed to the upper clamp and the lower clamp respectively by bolts.

[0015] Furthermore, the laser device includes:

[0016] A laser, mounted on the surface of the fixed platform, is used to emit a laser beam;

[0017] A reflector, disposed on one side of the support and corresponding to the specimen, is used to reflect the laser beam.

[0018] Furthermore, the test specimen is provided with a crack-resistant layer on the side away from the first gas spray gun, and an absorption layer is provided on the side of the test specimen close to the first gas spray gun.

[0019] A laser shock peening method, characterized in that the laser shock peening method includes:

[0020] Control the adhesive device to adhere the crack-resistant layer to the back of the specimen;

[0021] Control the relative distance between the upper and lower clamps of the robotic arm to adjust the prestress state inside the specimen;

[0022] The voltage control device changes the voltage and current state inside the specimen;

[0023] The laser device is controlled to perform laser shock strengthening on the specimen, and the gas spray gun is controlled to perform nitriding or carburizing on the specimen to obtain a strengthened specimen.

[0024] Furthermore, the laser-controlled device performs laser shock strengthening on the specimen, and the gas spray gun performs nitriding or carburizing on the specimen to obtain a strengthened specimen, including:

[0025] The specimen is heated by a resistance heating wire controlled by a voltage control device, and the specimen is nitrided or carburized by a first gas spray gun to obtain a strengthened specimen.

[0026] Furthermore, the method of controlling the laser device to perform laser shock strengthening on the specimen and controlling the gas spray gun to perform nitriding or carburizing on the specimen to obtain a strengthened specimen also includes:

[0027] The second gas spray gun is controlled to nitrid or carburize the specimen to obtain a strengthened specimen.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] In this invention, a laser beam is emitted from a laser device and applied to the surface of a specimen. Simultaneously, a first gas spray gun is mounted on a support, with one end connected to a first gas cylinder containing nitrogen or carbon dioxide. A resistance heating wire is installed at the nozzle of the first gas spray gun, heating the specimen while simultaneously spraying nitrogen or carbon dioxide gas. Nitrogen or carburization is performed on the specimen at high temperature. At the same time, laser shock peening is applied using the laser device under high temperature, effectively improving the stability of residual stress within the specimen at high temperatures. The combination of the first gas spray gun and the resistance heating wire makes carburizing or nitriding treatment of the specimen more convenient and simple, and the effect of laser shock peening is enhanced by the resistance heating wire. The device is simple to operate and improves processing efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0031] Figure 2 This is a schematic diagram of the laser device structure of the present invention.

[0032] Figure 3 This is a schematic flowchart of the laser shock peening method of the present invention.

[0033] Figure 4 This is a system block diagram of the laser shock peening method of the present invention.

[0034] The numbers in the figure represent: 1. Specimen; 2. Laser device; 3. First gas spray gun; 4. First gas cylinder; 5. Resistance heating wire; 6. Second gas spray gun; 7. Second gas cylinder; 8. Nozzle; 9. Liquid storage bottle; 10. Robotic arm; 11. Upper clamp; 12. Lower clamp; 13. Laser; 14. Reflector; 15. Crack-resistant layer; 16. Absorbing layer; 17. Constraint layer; 18. Controller; 19. Adhesion device; 20. Voltage control device. Detailed Implementation

[0035] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In view of the shortcomings of the prior art, this embodiment provides a laser shock strengthening device and method, which can be referred to as follows:

[0039] As attached Figure 1As shown, a laser shock peening device includes a fixed platform, a support mounted on the fixed platform, a laser device 2, a first gas spray gun 3, a first gas cylinder 4, and a resistance heating wire 5. The fixed platform is a platform for processing and testing, which can be fixed to the ground. A specimen 1 is mounted on the fixed platform for laser shock peening. The support is mounted on the fixed platform and is located on one side of the specimen 1. The laser device 2 is mounted on one side of the support and corresponds to the surface of the specimen 1, used to emit a laser beam that acts on the surface of the specimen 1. The first gas spray gun 3 is rotatably mounted on the side of the support where the laser device 2 is located, and the first gas spray gun 3 is located below the laser device 2. The position where the first gas spray gun 3 sprays onto the surface of the specimen 1 overlaps with the position where the laser beam emitted by the laser device 2 acts on the surface of the specimen 1. The gas spray gun 3 is connected to a first gas cylinder 4 via a pipe. The first gas cylinder 4 is located on one side of the support. The gas inside the first gas cylinder 4 is sprayed out by the first gas spray gun 3. The first gas cylinder 4 stores nitrogen or carbon dioxide. Thus, the first gas spray gun 3 can be used to nitrid or carburize the specimen 1. A resistance heating wire 5 is set at the nozzle of the first gas spray gun 3. By controlling the resistance heating wire 5, the nozzle of the first gas spray gun 3 is close to the surface of the specimen 1, and the specimen 1 is heated at that position, thereby achieving high-temperature carburizing and high-temperature laser shock strengthening. High-temperature laser shock strengthening can effectively improve the stability of residual stress at high temperatures, making the specimen 1 more suitable for working in high-temperature environments. The temperature range of the specimen 1 is 27℃-1000℃ through the heating of the resistance heating wire 5.

[0040] Specifically, a crack-resistant layer 15 can be attached to the back of specimen 1 to prevent cracks from appearing, and an absorption layer 16 can be attached to the front. The absorption layer 16 can protect the specimen from laser burns and enhance the absorption of laser energy. Then, by rotating the first gas spray gun 3, the position where it sprays onto specimen 1 overlaps with the position where the laser beam acts on specimen 1, which facilitates heating and nitriding or carburizing treatment of specimen 1 during laser shock strengthening. A switch valve is set between the first gas spray gun 3 and the first gas cylinder 4. The resistance heating wire 5 is connected to the controller 18 and the voltage control system. The controller 18 and the voltage control system are set at the bottom of the fixed platform. The controller 18 controls the voltage control system to supply current to the resistance heating wire 5, thereby realizing the heating of the resistance heating wire 5. When heating and laser shock strengthening of specimen 1, the surface of specimen 1 will generate a high temperature. During the carburizing or nitriding process of the first gas spray gun 3, nitrogen or carbon dioxide can also effectively prevent oxidation of the surface of specimen 1, avoiding a reduction in the effect of laser shock strengthening.

[0041] Furthermore, the material of the anti-crack layer 15 can be copper foil, aluminum foil, or black tape, etc., and the material selected should be the closest to the wave impedance of the specimen 1.

[0042] Furthermore, the material of the absorbent layer 16 can be black tape, aluminum foil, or copper foil, with a thickness of 0.1mm-2mm.

[0043] Furthermore, the absorption layer 16 can also be left unattached to increase the laser peak pressure and impact strengthening effect. At the same time, the outermost surface of the sample can be used as the absorption layer 16, allowing the surface to remelt and form a surface nano-carbonized layer or nitrided layer under the action of carburizing or nitriding.

[0044] As attached Figure 1 As shown, a second gas spray gun 6 is installed on one side of the support, located on the side where the first gas spray gun 3 is installed. The second gas spray gun 6 is positioned above the laser device 2, and the position where the second gas spray gun 6 sprays onto the specimen 1 is the same as the position where the laser beam acts on the specimen 1. The second gas spray gun 6 is connected to a second gas cylinder 7 via a pipe. The second gas cylinder 7 is located on one side of the support and contains liquid nitrogen or liquid carbon dioxide. Both liquid nitrogen and liquid carbon dioxide are in a low-temperature state. An electric heater is installed inside the second gas cylinder 7 to heat the liquid nitrogen and liquid carbon dioxide, turning them into a gaseous state, so that the second gas spray gun 6 can extract and spray them onto the surface of the specimen 1 to perform low-temperature nitriding or low-temperature carburizing on the specimen 1. Through the cooling effect of the second gas spray gun 6, the temperature range of the specimen 1 is -196℃ to 27℃.

[0045] Specifically, a switch valve is installed inside the pipeline between the second gas cylinder 7 and the second gas spray gun 6. The controller 18 can control the switch valve to open and close. The electric heater is electrically connected to the voltage control system, which provides current to the electric heater to make it heat up.

[0046] Furthermore, some metals exhibit springback when subjected to laser shock strengthening at room temperature or high temperature, which can weaken the surface strengthening effect of specimen 1 after carburizing or nitriding at high temperature. For example, nickel-titanium alloys or nickel-titanium copper alloys require carburizing or nitriding at low temperature to better strengthen the surface of specimen 1.

[0047] As attached Figure 1 As shown, a nozzle 8 is provided on one side of the support and is located on the side where the first gas spray gun 3 is located. The nozzle 8 is located above the second gas spray gun 6. A liquid storage bottle 9 is provided on one side of the support. An electric heater is provided inside the liquid storage bottle 9. The liquid storage bottle 9 stores liquids such as pure water and high-temperature resistant oil. The liquid is extracted by the nozzle 8 in conjunction with a liquid pump and sprayed onto the surface of the specimen 1, forming a constraint layer 17 on the surface of the specimen 1.

[0048] Furthermore, the material of the constraint layer 17 can be water, K9 glass, etc., to enhance the peak pressure on the sample surface during laser shock strengthening. The thickness of the constraint layer 17 is 0.1mm-2mm.

[0049] Furthermore, the constraint layer 17 can also be omitted, and is used to increase the remelting temperature of the material surface, so that a deeper surface nano-carburized layer or nitrided layer can be formed under the action of carburizing or nitriding.

[0050] Furthermore, the electric heater is electrically connected to the voltage controller 18 system. The voltage control system controls the input of a certain current to the electric heater, thereby causing the electric heater to generate heat and heat the liquid in the constraint layer 17.

[0051] As attached Figure 1 As shown, a robotic arm 10 is set on a fixed platform. An upper clamp 11 and a lower clamp 12 are slidably set on one side of the robotic arm 10. The upper clamp 11 and the lower clamp 12 are symmetrically arranged. The specimen 1 is fixed to the upper clamp 11 and the lower clamp 12 by bolts.

[0052] Furthermore, the robotic arm 10 is connected to the controller 18, which can control the movement of the robotic arm 10. Because the laser shock strengthening range is small, the robotic arm 10 drives the specimen 1 to move, thereby achieving laser shock strengthening of the entire surface of the specimen 1. At the same time, the controller 18 can control the upper clamp 11 and the lower clamp 12 to slide towards each other or away from each other, thereby adjusting the distribution of internal stress in the specimen 1, thereby reducing the Schungner elastic limit of the specimen 1 (the Schungner elastic limit is the highest elastic limit stress of a metal in the direction of shock wave propagation), and increasing the residual compressive stress level and influence depth on the material surface.

[0053] Furthermore, by stretching or compressing the specimen 1, the absorption layer 16 can be removed. By heating the surface of the specimen 1 with the resistance heating wire 5 and changing the prestress inside the specimen 1, the sample can be more easily plastically deformed, thereby increasing the residual compressive stress on the surface of the specimen 1 and the depth of the laser-affected layer, which can better strengthen the specimen 1. At the same time, the outermost surface of the sample can be used as the absorption layer 16, so that the surface can be remelted to form a surface nano-carbonized / nitrided layer.

[0054] As attached Figure 2 As shown, the laser device 2 includes a laser 13 and a reflector 14. The laser 13 is disposed on the surface of the fixed platform and is electrically connected to the controller 18. The controller 18 can control the laser 13 to emit a laser beam. The reflector 14 is disposed on one side of the support and corresponds to the specimen 1. The laser beam is emitted by the laser 13 and reflected by the reflector 14, so that the laser beam acts on the surface of the specimen 1.

[0055] Furthermore, the diameter of the laser spot can be changed by altering the model and position of the reflector 14.

[0056] Furthermore, the parameters of the laser beam emitted by the laser 13 are controlled by the controller 18. The spot diameter of the laser beam after being focused by the optical path system is 0.05mm-3mm. The parameters of the laser 13 include: wavelength 500mm-1500nm, pulse width 1ns-30ns, laser energy 0.01J-10J, repetition frequency 0.5HZ-20HZ, and spot diameter 0.5mm-3mm.

[0057] Furthermore, the specimen 1 is electrically connected to the voltage control device 20, and the voltage and current inside the specimen 1 are changed by the voltage control device 20, thereby improving the laser shock strengthening effect.

[0058] The working principle is as follows:

[0059] A crack-resistant layer 15 is attached to the back of specimen 1. Then, both ends of specimen 1 are fixed to the upper clamp 11 and lower clamp 12 respectively using bolts. The distance between the upper clamp 11 and lower clamp 12 is adjusted by the robotic arm 10, thereby adjusting the prestress inside specimen 1. The voltage and current inside specimen 1 are controlled by the voltage control device 20. A laser beam is emitted by the laser 13 and acts on the surface of specimen 1 through the reflector 14. Simultaneously, depending on the material of specimen 1, high-temperature carburizing or nitriding, or low-temperature carburizing or nitriding, is selected. When high-temperature carburizing or nitriding is selected, the resistance heating wire 5 is heated by the voltage control device 20, and the gas inside the first gas cylinder 4 is sprayed out by the first gas spray gun 3, which heats the surface of the specimen 1 at the same time, thereby improving the laser shock strengthening effect. When low-temperature carburizing or nitriding is selected, the electric heater is heated by the voltage control device 20 to change the vaporization rate of the liquefied gas inside the second gas cylinder 7. The gas is sprayed onto the surface of the specimen 1 through the second gas spray gun 6 to cool it down. At the same time, carburizing or nitriding is performed during the cooling process, thereby obtaining the strengthened specimen 1.

[0060] For high-strength alloys, such as high-entropy alloys, the influence depth of existing laser shock strengthening specimens 1 is between a few micrometers and hundreds of micrometers. This scheme changes the prestress state, voltage and current inside the specimen 1, as well as the surface temperature of the specimen 1, so that the laser shock strengthening influence can reach the millimeter level, resulting in a better surface strengthening effect of the specimen 1.

[0061] See attached document Figure 3 With appendix Figure 4 This invention discloses a laser shock strengthening method, the laser shock strengthening method comprising:

[0062] S100, the bonding device 19 controls the bonding of the crack-resistant layer 15 to the back of the specimen 1;

[0063] The controller 18 controls the pasting device 19 to paste the anti-crack layer 15 on the back of the specimen 1 to prevent cracks from forming on the back of the specimen 1 under laser shock strengthening. The pasting device 19 can be a robot, robotic arm, etc.

[0064] S200: Control the relative distance between the upper clamp 11 and the lower clamp 12 of the robotic arm 10 to adjust the prestress state inside the specimen 1;

[0065] The controller 18 controls the upper clamp 11 and lower clamp 12 of the robotic arm 10 to move towards each other or away from each other, thereby compressing or stretching the specimen 1, adjusting the prestress inside the specimen 1, and increasing the depth of the laser shock strengthening effect.

[0066] S300, the voltage control device 20 changes the voltage and current state inside the specimen 1;

[0067] The controller 18 controls the voltage control device 20 to input different currents to the specimen 1, thereby changing the voltage and current state inside the specimen 1 and improving the plasticity of the specimen 1.

[0068] S400, controls the laser device 2 to perform laser shock strengthening on the specimen 1 and controls the gas spray gun to perform nitriding or carburizing on the specimen 1 to obtain the strengthened specimen 1.

[0069] The laser device 2 emits a laser beam that acts on the specimen 1, while nitrogen or carbon dioxide is sprayed onto the specimen 1 through a gas spray gun. This allows for nitriding or carburizing during laser shock strengthening, making the method simpler and keeping the specimen 1 at a high temperature, which can improve the effect of laser shock strengthening. The controller 18 controls the movement of the robotic arm 10 to achieve comprehensive strengthening of the surface of the specimen 1.

[0070] The laser device 2 is controlled to perform laser shock strengthening on the specimen 1, and the gas spray gun is controlled to perform nitriding or carburizing on the specimen 1 to obtain the strengthened specimen 1, including:

[0071] The voltage control device 20 controls the resistance heating wire 5 to heat the specimen 1 and controls the first gas spray gun 3 to nitrid or carburize the specimen 1 to obtain the strengthened specimen 1.

[0072] For some materials suitable for high-temperature nitriding or carburizing, the voltage control device 20 is controlled by the controller 18 to heat the resistance heating wire 5, thereby heating the surface of the specimen 1. At the same time, the gas ejected from the first gas spray gun 3 is heated. While the laser shock strengthening effect is being applied, high-temperature carburizing or high-temperature nitriding is being carried out to obtain the strengthened specimen 1.

[0073] The method further includes controlling the laser device 2 to perform laser shock strengthening on the specimen 1 and controlling the gas spray gun to perform nitriding or carburizing on the specimen 1 to obtain the strengthened specimen 1, and also includes:

[0074] The second gas spray gun 6 is controlled to perform low-temperature nitriding or high-low temperature carburizing on the specimen 1 to obtain the strengthened specimen 1.

[0075] For some materials suitable for low-temperature nitriding or carburizing, the controller 18 controls the second gas spray gun 6 to spray low-temperature gas for nitriding or carburizing to obtain the strengthened specimen 1.

[0076] The cryogenic gas connected to the second gas spray gun 6 can be stored in the second gas cylinder 7. The second gas cylinder 7 stores liquefied nitrogen or liquefied carbon dioxide. An electric heater is installed inside the second gas cylinder 7, and the electric heater is controlled by the voltage control device 20 to heat the liquefied gas, so that the liquefied gas becomes a gaseous gas. Then, it is sprayed onto the surface of the specimen 1 through the second gas spray gun 6 to perform cryogenic nitriding or cryogenic carburizing treatment on the specimen 1.

[0077] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

Claims

1. A laser shock peening device, comprising a fixed platform and a support mounted on the fixed platform, characterized in that, Also includes: A laser device is disposed on one side of the support, and the laser device is used to emit a laser beam and irradiate the specimen corresponding to the laser device; The first gas spray gun is rotatably mounted on the support near the specimen and located below the laser device. The position where the first gas spray gun sprays onto the surface of the specimen overlaps with the position where the laser beam of the laser device irradiates the surface of the specimen. The first gas cylinder is located on one side of the bracket, and the first gas cylinder is connected to the first gas spray gun through a pipe. A resistance heating wire is positioned at the nozzle of the first gas spray gun; An adhesive device for attaching a crack-resistant layer to the back of the specimen; A voltage control device is connected to the resistance heating wire; A robotic arm is installed on the fixed platform. An upper clamp and a lower clamp are slidably mounted on one side of the robotic arm. The upper clamp and the lower clamp are symmetrical to each other. The specimen is fixed to the upper clamp and the lower clamp by bolts. The upper clamp and the lower clamp can slide towards each other or away from each other to adjust the stress distribution in the specimen. A crack-resistant layer is pasted on the back of the specimen. A second gas spray gun is provided on one side of the bracket and is located on the side of the bracket where the first gas spray gun is located. The second gas spray gun is located above the laser device. A second gas cylinder is provided on one side of the bracket, and the second gas cylinder is connected to the second gas spray gun through a pipe.

2. The laser shock peening device according to claim 1, characterized in that, The second gas cylinder contains either liquefied nitrogen or liquefied carbon dioxide, and an electric heater is installed inside the second gas cylinder.

3. The laser shock peening device according to claim 1, characterized in that, A nozzle is provided on one side of the bracket, located on the side where the first gas spray gun is located. A liquid storage bottle is provided on one side of the bracket, and an electric heater is provided inside the liquid storage bottle.

4. The laser shock peening device according to claim 1, characterized in that, The laser device includes: A laser, mounted on the surface of the fixed platform, is used to emit a laser beam; A reflector, disposed on one side of the support and corresponding to the specimen, is used to reflect the laser beam.

5. The laser shock peening device according to claim 1, characterized in that, An absorption layer is provided on the side of the specimen near the first gas spray gun.

6. A laser shock peening method, characterized in that, According to any one of claims 1-5, the laser shock strengthening device and the laser shock strengthening method include: Control the adhesive device to adhere the crack-resistant layer to the back of the specimen; Control the relative distance between the upper and lower clamps of the robotic arm to adjust the prestress state inside the specimen; The voltage control device changes the voltage and current state inside the specimen; The laser device is controlled to perform laser shock strengthening on the specimen and the gas spray gun is controlled to perform nitriding or carburizing on the specimen to obtain a strengthened specimen. The laser device emits a laser beam to act on the specimen, and at the same time, nitrogen or carbon dioxide is sprayed onto the specimen through the gas spray gun, so that nitriding or carburizing is performed at the same time as laser shock strengthening. The laser control device performs laser shock strengthening on the specimen, and the gas spray gun is controlled to perform nitriding or carburizing on the specimen to obtain a strengthened specimen, including: When high-temperature nitriding or carburizing is required, the resistance heating wire is controlled by a voltage control device to heat the specimen and the first gas spray gun is controlled to nitrid or carburize the specimen to obtain a strengthened specimen. When low-temperature nitriding or carburizing is required, the second gas spray gun is controlled to nitrid or carburize the specimen to obtain a strengthened specimen.

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