A warm-assisted laser shock peening device

Abstract

The application discloses a kind of temperature auxiliary laser shock peening devices, including shell, pulsed laser, water tank, six-axis linkage manipulator and fixture, the electromagnetic valve is arranged in the outer wall of shell, vacuum pump is connected to the electromagnetic valve, the shell can be evacuated, the pulsed laser is installed in the inner wall front side of shell, the water tank is installed in the inner wall bottom of shell, for storing the cooling water when workpiece processing, the six-axis linkage manipulator is installed in water tank upper surface rear side, the fixture is installed in six-axis linkage manipulator output end. Full-surface no dead angle flushing operation of workpiece can be realized;While laser heater follows swing and completes workpiece uniform preheating, rheological stress is reduced after workpiece temperature rise, can promote surface absorption layer sufficient gasification ionization, generate more deep, more high amplitude residual compressive stress and work hardening layer, greatly improve the surface strengthening quality of titanium alloy, high-temperature alloy and other special materials, improve equipment use range.

Description

Technical Field

[0001] This invention relates to the field of laser shock peening technology for workpieces, specifically a temperature-assisted laser shock peening device. Background Technology

[0002] Laser shock peening is a highly efficient metal surface modification process. It relies on high-peak pulsed lasers to induce high-pressure plasma shock waves, causing plastic deformation of the material surface. This results in the formation of a large-amplitude, deep residual compressive stress layer and a work-hardened layer on the workpiece surface. This effectively inhibits fatigue crack initiation, delays crack propagation, and significantly improves the workpiece's overall performance, including wear resistance, fatigue resistance, and stress corrosion resistance. Actual service conditions show that the strengthening effect of laser shock peening can only be stably maintained when the amplitude and depth of the residual compressive stress layer and work-hardened layer on the workpiece surface are maintained at a high level over a long period.

[0003] However, existing conventional laser shock peening equipment suffers from significant technical defects in actual processing due to multiple factors such as workpiece pretreatment status, processing environment, and material properties, which restrict the improvement of strengthening effect. Specifically, there are three main shortcomings: First, after machining, transportation, and storage, burrs, dust, cutting residue, and other impurities inevitably adhere to the surface of the workpiece. Traditional equipment lacks a matching integrated cleaning mechanism, and the workpiece is directly subjected to laser impact treatment with these impurities. These impurities will block the laser beam, causing laser energy divergence and attenuation, resulting in a significant decrease in effective impact pressure. Ultimately, this leads to uneven strengthening of the workpiece surface, insufficient residual compressive stress in local areas, and directly weakens the overall strengthening effect.

[0004] Secondly, for special metal workpieces with poor plasticity, such as high-temperature alloys and titanium alloys, existing equipment can only carry out room-temperature laser shock processing. At room temperature, the material has high rheological stress, and the surface absorption layer has limited vaporization and ionization after laser irradiation. The energy utilization rate of the shock wave generated by the plasma is low, making it difficult to generate a deeper and higher amplitude residual compressive stress hardening layer. This makes it impossible to fully improve the surface properties of special workpieces, and the range of materials that the equipment can process is limited.

[0005] Third, traditional processing cavities are mostly open structures, which cannot isolate oxygen in the air. Under the instantaneous high temperature of laser shock, metal workpieces are prone to oxidation reactions, forming a brittle oxide layer. This oxide layer, on the one hand, consumes laser energy and reduces the intensity of the shock wave, and on the other hand, hinders the full vaporization and ionization of the absorption layer on the workpiece surface. Under these dual effects, the strengthening effect is further reduced. At the same time, surface oxidation defects are prone to becoming sources of fatigue crack initiation, shortening the service life of the workpiece. Summary of the Invention

[0006] The purpose of this invention is to provide a temperature-assisted laser shock peening device to at least solve the problems of existing technologies that cannot remove impurities and preheat workpieces before processing, and that change the processing environment, resulting in poor material processing effects.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a temperature-assisted laser shock blasting device, comprising a housing, a pulsed laser, a water tank, a six-axis linkage robot, and a fixture. An electromagnetic valve is installed on the outer wall of the housing, and a vacuum pump is connected to the electromagnetic valve to evacuate the housing. The pulsed laser is installed on the front side of the inner wall of the housing. The water tank is installed at the bottom of the inner wall of the housing to store cooling water during workpiece processing. The six-axis linkage robot is installed on the rear side of the upper surface of the water tank. The fixture is installed at the output end of the six-axis linkage robot, which clamps the workpiece. As the six-axis linkage robot moves the workpiece, the pulsed laser pulses towards the workpiece. The surface of the component emits laser light uniformly. A first base is installed on the right side of the upper surface of the water tank. A filter, a water pump, and a cleaning mechanism are installed sequentially from front to back on the upper surface of the first base. One end of the filter is led to the bottom of the water tank through a water pipe, and the other end is connected to the water pump inlet. The filter filters the cooling water in the water tank, and then sends it to the cleaning mechanism after being pressurized by the water pump. A second base is installed on the right side wall of the casing. An air pump and an air pipe are installed sequentially from front to back on the upper surface of the second base. The air pump inlet is connected to the air tank outlet through an air pipe. The air pump draws inert gas from the air tank, pressurizes it, and sends it to the cleaning mechanism. The cleaning mechanism sprays a gas-liquid mixture outward. The cleaning mechanism includes a housing installed on the rear side of the upper surface of the first base. The inner cavity of the housing is equipped with a swing assembly, which changes the workpiece rinsing direction and preheating range. The top of the housing is equipped with a flow converter to adjust the cleaning impact force.

[0008] Preferably, the rocking assembly includes two meshing first gears mounted on the inner cavity of the housing via pins. A plurality of levers are equidistantly mounted on the front of the first gears along the circumference. The two first gears drive the two sets of levers to rotate in opposite directions. A motor that drives the first gears to rotate is mounted on the rear side of the housing. A rotating shaft is mounted on the front of the housing via bearings. Mounting seats and second gears are respectively mounted on the front and rear ends of the rotating shaft. The second gears mesh with the levers. A nozzle and a laser heater are respectively mounted on the upper and lower ends of the mounting seats. The nozzle is used to spray a gas-liquid mixture, while the laser heater preheats the workpiece with laser energy.

[0009] The rotation of the two sets of levers is reversed by the transmission of the two first gears. With the help of the transmission of the two sets of levers and the second gear, the shaft rotates back and forth clockwise and counterclockwise, thereby expanding the rinsing and preheating area.

[0010] Preferably, the two sets of levers on the two first gears are positioned opposite each other.

[0011] Preferably, the converter assembly includes a housing embedded in the top of the housing, a roller is mounted on the right side of the inner cavity of the housing via a bearing, a third gear is mounted at the front end of the roller to mesh with the first gear and provide rotational power to the roller, a guide groove is provided on the outer wall of the roller, a telescopic unit is provided at the front left end of the housing, a gas-liquid mixer is installed on the right side of the telescopic unit, and the two ports of the gas-liquid mixer are respectively connected to the liquid outlet of the water pump and the gas outlet of the air pump.

[0012] By rotating the drum to change the contact point between the guide groove and the telescopic unit, the telescopic unit can adjust the flow rate of the rinsing fluid, thereby achieving variable flow rinsing of the workpiece and improving the rinsing effect.

[0013] Preferably, the transmission ratio between the first gear and the third gear is less than 1.

[0014] Preferably, the guide groove is composed of multiple elliptical segments arranged in a zigzag pattern on the outer wall of the roller, with the horizontal and oblique ends of the zigzag lines alternating.

[0015] Preferably, the telescopic unit includes a valve body installed on the left side of the front side of the housing. Interfaces are installed on both the left and right sides of the valve body. The interface on the right side is installed with a gas-liquid mixer, and the interface on the left side is connected to a nozzle through a water pipe. A valve core is inserted into the inner cavity of the valve body. Several liquid outlet holes are opened on the outer wall of the valve core from front to back. One end of a traction rod is installed on the rear side of the valve core. The other end of the traction rod is installed with a guide wheel that is inserted into the inner cavity of the guide groove. The guide wheel is in a rolling connection with the guide groove to prevent jamming.

[0016] Preferably, the liquid outlet has two or more inner diameters and the positions are alternated.

[0017] The beneficial effects of the temperature-assisted laser shock peening device proposed in this invention are as follows: 1. This invention employs a pair of meshing first gears to achieve synchronous counter-rotation of two sets of levers. The two sets of levers alternately move the second gear to complete the forward and reverse reversal, driving the mounting base to drive the nozzle and laser heater to reciprocate synchronously, expanding the rinsing coverage and preheating area, enabling full-surface rinsing of the workpiece without dead angles. Simultaneously, the laser heater follows the oscillation to uniformly preheat the workpiece. After the workpiece is heated, the rheological stress decreases, which can promote the full vaporization and ionization of the surface absorption layer, generating deeper and higher amplitude residual compressive stress and work-hardened layer, significantly improving the surface strengthening quality of special materials such as titanium alloys and high-temperature alloys, and expanding the application range of the equipment.

[0018] 2. This invention relies on the transmission driven by the first gear and the third gear to continuously rotate the drum. The zigzag elliptical guide groove on the outer wall of the drum cooperates with the guide wheel to pull the valve core to slide back and forth intermittently, switching the conduction state of the liquid outlet holes with different inner diameter specifications, dynamically adjusting the flushing liquid flow rate and impact intensity. Together with the gas-liquid mixer, a gas-liquid mixed flushing medium is formed, which can remove various surface impurities such as floating dust, oil stains, and hard burrs in layers, thoroughly restoring the surface cleanliness of the workpiece, avoiding impurities blocking and scattering the laser beam, causing laser energy attenuation, promoting the heating of the laser heater, and fundamentally solving the processing defects of insufficient local strengthening and uneven surface stress distribution of the workpiece.

[0019] 3. The present invention has two main advantages: First, it mixes with cooling water to form a high-pressure gas-liquid jet, which helps to improve the removal and cleaning effect of impurities. Second, it continuously fills the sealed housing cavity, reducing the internal oxygen content and isolating oxygen under the high-temperature conditions of laser shock, preventing the formation of a brittle oxide layer on the workpiece surface, eliminating the risk of fatigue cracks induced by oxidation defects. At the same time, the low-oxygen sealed environment can reduce plasma energy loss, further promote the vaporization and ionization of the absorption layer on the workpiece surface, stabilize and improve the efficiency of laser shock wave action, and ensure the stable and reliable strengthening performance of the workpiece. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 3 This is a perspective view of the cleaning mechanism of the present invention; Figure 4 This is a perspective view of the swing component of the present invention; Figure 5 This is an exploded view of the converter component of the present invention; Figure 6 This is a diagram of the developed drum of the present invention; Figure 7 This is a perspective view of the telescopic unit of the present invention.

[0021] In the diagram: 1. Housing; 2. Pulsed laser; 3. Water tank; 4. Six-axis linkage robot; 5. Fixture; 6. First base; 7. Filter; 8. Water pump; 9. Cleaning mechanism; 10. Second base; 11. Air pump; 12. Air tank; 91. Box; 92. Swing assembly; 93. Converter assembly; 921. First gear; 922. Lever; 923. Motor; 924. Shaft; 925. Mounting base; 926. Second gear; 927. Nozzle; 928. Laser heater; 931. Box; 932. Roller; 933. Third gear; 934. Guide groove; 935. Telescopic unit; 936. Gas-liquid mixer; 9351. Valve body; 9352. Interface; 9353. Valve core; 9354. Liquid outlet; 9355. Traction rod; 9356. Guide wheel. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-7 This invention provides a technical solution: a temperature-assisted laser shock strengthening device, comprising a housing 1, a pulsed laser 2, a water tank 3, a six-axis linkage robot 4, and a clamp 5. An electromagnetic valve is installed on the outer wall of the housing 1, and a vacuum pump is connected to the electromagnetic valve to evacuate the housing 1. The pulsed laser 2 is installed on the front side of the inner wall of the housing 1, emitting pulsed laser light. The laser shock wave impacts the workpiece surface, causing the absorption layer on the workpiece surface to vaporize and ionize, resulting in plastic deformation of the material surface and improving the material's fatigue strength, wear resistance, and corrosion resistance. The water tank 3 is installed at the bottom of the inner wall of the housing 1 to store cooling water during workpiece processing. The six-axis linkage robot 4 is installed on the rear side of the upper surface of the water tank 3. The clamp 5 is installed at the output end of the six-axis linkage robot 4, and the output end of the six-axis linkage robot 4 is also equipped with a bamboo-joint tube, which can change the water outlet position to spray water onto the workpiece surface for cooling. The workpiece is clamped by the clamp 5. As the six-axis linkage robot 4 moves the workpiece, the pulsed laser 2 emits laser light uniformly onto the workpiece surface. A first base 6 is installed on the right side of the upper surface of the water tank 3. A filter 7, a water pump 8, and a cleaning mechanism 9 are installed sequentially from front to back on the upper surface of the first base 6. One end of the filter 7 is led to the bottom of the water tank 3 through a water pipe, and the other end is connected to the water inlet of the water pump 8. The filter 7 filters the cooling water in the water tank 3 to prevent impurities from hindering the surface strengthening of the workpiece. After being pressurized by the water pump 8, the water is sent to the cleaning mechanism 9. A second base 10 is installed on the right side wall of the housing 1. An air pump 11 and an air pipe 12 are installed sequentially from front to back on the upper surface of the second base 10. The air inlet of the air pump 11 is connected to the air outlet of the air tank 12 through an air pipe. The air pump 11 draws inert gas from the air tank 12, pressurizes it, and sends it to the cleaning mechanism 9. The cleaning mechanism 9 sprays a gas-liquid mixture outward. At the same time, the inert gas reduces the oxygen content and prevents the workpiece from oxidizing at high temperature. The cleaning mechanism 9 includes a housing 91 installed on the rear side of the upper surface of the first base 6. The inner cavity of the housing 91 is provided with a swing assembly 92, which changes the workpiece rinsing direction and preheating range. The top of the housing 91 is provided with a converter assembly 93 to adjust the cleaning impact force.

[0024] As a preferred embodiment, the rocking assembly 92 further includes two meshing first gears 921 mounted on the inner cavity of the housing 91 via pins. A plurality of levers 922 are equidistantly mounted circumferentially on the front of each first gear 921. The levers 922 are cylindrical, and their curved surfaces can rotate to contact the teeth of the third gear 933, preventing jamming when the levers 922 rotate the third gear 933. The two first gears 921 drive the two sets of levers 922 to rotate in opposite directions. The two sets of levers 922 on the two first gears 921 are positioned opposite each other, allowing the two sets of levers 922 to rotate in opposite directions. The lever 922 alternately drives the third gear 933, thereby realizing the back-and-forth rotation of the third gear 933. The motor 923 that drives the first gear 921 to rotate is installed on the rear side of the housing 91. The rotating shaft 924 is installed on the front of the housing 91 through the bearing. The mounting base 925 and the second gear 926 are respectively installed at the front and rear ends of the rotating shaft 924. The second gear 926 meshes with the lever 922. The nozzle 927 and the laser heater 928 are respectively installed at the upper and lower ends of the mounting base 925. The nozzle 927 is used to spray the gas-liquid mixture, while the laser heater 928 preheats the workpiece with laser energy.

[0025] Driven by a motor 923, a pair of meshing first gears 921 drive two sets of levers 922 to alternately move the second gear 926, enabling the mounting base 925, nozzle 927, and laser heater 928 to reciprocate synchronously over a wide range. This not only allows for the complete, blind-angle spraying of gas-liquid mixture to remove various impurities from the workpiece surface, but also enables the simultaneous and uniform preheating of the entire workpiece area. After heating, the absorption layer on the workpiece surface is fully vaporized and ionized, enhancing the overall effect of laser shock peening. It is suitable for processing various special materials such as titanium alloys and high-temperature alloys, thus broadening the applicability of the device.

[0026] As a preferred embodiment, the converter assembly 93 further includes a housing 931 embedded in the top of the housing 91. A roller 932 is mounted on the right side of the inner cavity of the housing 931 via a bearing. A third gear 933 is mounted at the front end of the roller 932, meshing with the first gear 921 to provide rotational power to the roller 932. The transmission ratio between the first gear 921 and the third gear 933 is less than 1, increasing the angular velocity of the third gear 933 so that the water flow switching speed can keep up with the rinsing rhythm. A guide groove 934 is provided on the outer wall of the roller 932. The guide groove 934 is distributed in an elliptical shape by multiple folded lines on the outer wall of the roller 932, with the horizontal folded lines and the oblique lines alternating in position. The guide grooves 934 on the left and right sides have different inclination directions. If one side of the slope is responsible for pressing the guide wheel 9356 forward, then the other side of the slope is responsible for pressing the guide wheel 9356 backward. The horizontal broken line is to limit the guide wheel 9356, so that the traction rod 935 moves back and forth intermittently to achieve the switching of the position of the liquid outlet 9354. A telescopic unit 935 is set at the front left end of the box 931. A gas-liquid mixer 936 is installed on the right side of the telescopic unit 935. The two ports of the gas-liquid mixer 936 are connected to the liquid outlet of the water pump 8 and the air outlet of the air pump 11, respectively. The gas-liquid mixer 936 can mix inert gas with cooling water to diversify the impact force.

[0027] The rotational speed of the drum 932 is increased by the transmission of the first gear 921 and the third gear 933. The guide groove 934 with a special structure on the outer wall of the drum 932 drives the valve core 9353 inside the telescopic unit 935 to slide intermittently, automatically switching the liquid outlet holes 9354 with different inner diameters to dynamically adjust the flow rate and impact intensity of the gas-liquid mixture. Combined with the gas-liquid mixer 936, cooling water and inert gas are mixed to form a composite high-pressure jet, which can specifically remove various impurities such as floating dust, oil stains, and hard burrs from the surface of the workpiece, restore the cleanliness of the workpiece surface, avoid energy attenuation caused by impurities blocking and scattering the laser, and effectively prevent the workpiece from having processing defects such as insufficient local strengthening and uneven stress distribution.

[0028] As a preferred embodiment, the telescopic unit 935 further includes a valve body 9351 installed on the left front side of the housing 931. Interfaces 9352 are installed on both sides of the valve body 9351. The right-side interface 9352 is connected to the gas-liquid mixer 936, and the left-side interface 9352 is connected to the nozzle 927 via a water pipe. A valve core 9353 is inserted into the inner cavity of the valve body 9351. The valve core 9353 is rectangular in shape to prevent changes in the direction of the liquid outlet 9354 and the guide wheel 9356. The outer wall of the valve core 9353... Several liquid outlet holes 9354 are provided from front to back, with two or more types of liquid outlet holes 9354 having different inner diameters and their positions being alternated. By changing the flow rate through the liquid outlet holes 9354, the flushing impact force can be adjusted while the cross-sectional area of ​​the water pipe remains unchanged, thus achieving a flushing effect on various impurities such as stubborn and superficial impurities. One end of the traction rod 9355 is installed on the rear side of the valve core 9353, and the other end of the traction rod 9355 is installed with a guide wheel 9356 that is inserted into the inner cavity of the guide groove 934. The guide wheel 9356 is in a rolling connection with the guide groove 934 to prevent jamming.

[0029] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0030] Step 1: Use clamp 5 to hold and fix the workpiece, evacuate the inside of the housing 1, and use the six-axis linkage robot 4 to move the workpiece to the cleaning mechanism 9 to perform cleaning and preheating positioning. Step 2: After the cooling water in the water tank 3 is filtered by the filter 7, the water pump 8 pressurizes the water and delivers it to the gas-liquid mixer 936. At the same time, the air pump 11 extracts the inert gas from the air tank 12 and pressurizes it, and then delivers it to the gas-liquid mixer 936 to form a gas-liquid mixture that reaches the valve body 9351 to provide workpiece rinsing fluid. Step 3: Motor 923 drives the first gear 921 to rotate. Under the transmission condition of the two first gears 921, the levers 922 distributed vertically rotate in opposite directions. If one lever 922 drives the second gear 926 to rotate clockwise, then the other lever 922 drives the second gear 926 to rotate counterclockwise. As the levers 922 on the two first gears 921 alternately drive the second gear 926, the rotating shaft 924 drives the mounting base 925 to swing back and forth, expanding the rinsing and preheating area. Step 4: Under the transmission conditions of the first gear 921 and the third gear 933, the drum 932 is rotated. If the left inclined surface of the guide groove 934 on the drum 932 is responsible for squeezing the guide wheel 9356 backward, the guide wheel 9356 is limited in the front and rear when it is in the horizontal section of the guide groove 934. The right inclined surface of the guide groove 934 is responsible for squeezing the guide wheel 9356 forward, and the horizontal section of the guide groove 934 still limits the guide wheel 9356. Therefore, the valve core 9353 is moved back and forth intermittently, so that the liquid outlet holes 9354 with different inner diameters can conduct the valve body 9351. The flushing liquid flow rate is adjusted by the inner diameter of the liquid outlet hole 9354, providing a changing impact force. While the mounting base 925 swings to thoroughly flush the workpiece, the changing impact effect can not only clean stubborn impurities, but also remove light impurities such as floating dust with a gentle impact effect. Step 5: After the workpiece is cleaned, the laser heater 928 is moved by the mounting base 925 to heat the workpiece with laser energy, thereby preheating the workpiece and assisting in strengthening the workpiece surface. Step six: Finally, the six-axis linkage robot 4 is used to move the workpiece to the impact point. The pulsed laser 2 emits pulsed laser towards the workpiece. Since the inert gas is insoluble in cooling water, the inert gas is released into the housing 1 as a protective gas, which promotes the vaporization and ionization of the absorption layer on the workpiece surface. The material surface undergoes plastic deformation, which improves the fatigue strength, wear resistance and corrosion resistance of the material.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temperature-assisted laser shock peening device, comprising a housing (1), a pulsed laser (2), a water tank (3), a six-axis linkage robot (4), and a fixture (5), wherein an electromagnetic valve is provided on the outer wall of the housing (1), and a vacuum pump is connected to the electromagnetic valve to evacuate the housing (1); the pulsed laser (2) is installed on the front side of the inner wall of the housing (1); the water tank (3) is installed at the bottom of the inner wall of the housing (1) for storing cooling water during workpiece processing; the six-axis linkage robot (4) is installed on the rear side of the upper surface of the water tank (3); and the fixture (5) is installed at the output end of the six-axis linkage robot (4) to clamp the workpiece. As the six-axis linkage robot (4) moves the workpiece, the pulsed laser (2) emits laser light uniformly onto the surface of the workpiece. A first base (6) is installed on the right side of the upper surface of the water tank (3). A filter (7), a water pump (8) and a cleaning mechanism (9) are installed on the upper surface of the first base (6) from front to back. One end of the filter (7) is led to the bottom of the water tank (3) through a water pipe, and the other end is connected to the water inlet of the water pump (8). The filter (7) filters the cooling water in the water tank (3) and then sends it to the cleaning mechanism (9) after being pressurized by the water pump (8). A second base (10) is installed on the right side wall of the casing (1). An air pump (11) and an air pipe (12) are installed on the upper surface of the second base (10) from front to back. The air inlet of the air pump (11) is connected to the air outlet of the air tank (12) through an air pipe. The air pump (11) draws inert gas from the air tank (12), pressurizes it, and sends it to the cleaning mechanism (9). The cleaning mechanism (9) sprays the gas-liquid mixture outward. The cleaning mechanism (9) includes a box (91) installed on the rear side of the upper surface of the first base (6). The inner cavity of the box (91) is provided with a swing assembly (92). The swing assembly (92) changes the workpiece rinsing direction and preheating range. The top of the box (91) is provided with a converter assembly (93) to adjust the cleaning impact force.

2. The temperature-assisted laser shock peening device according to claim 1, characterized in that, The swing assembly (92) includes two meshing first gears (921) mounted on the inner cavity of the housing (91) via pins. Several levers (922) are equidistantly mounted on the front of the first gears (921) along the circumference. The two first gears (921) drive the two sets of levers (922) to rotate in opposite directions. A motor (923) that drives the first gears (921) to rotate is mounted on the rear side of the housing (91). A rotating shaft (924) is mounted on the front of the housing (91) via bearings. Mounting seats (925) and second gears (926) are respectively mounted on the front and rear ends of the rotating shaft (924). The second gears (926) mesh with the levers (922). A nozzle (927) and a laser heater (928) are respectively mounted on the upper and lower ends of the mounting seat (925). The nozzle (927) is used to spray a gas-liquid mixture, while the laser heater (928) preheats the workpiece with laser energy.

3. The temperature-assisted laser shock peening device according to claim 2, characterized in that, The two sets of levers (922) on the two first gears (921) are positioned opposite each other.

4. The temperature-assisted laser shock peening device according to claim 3, characterized in that, The converter assembly (93) includes a box (931) embedded in the top of the housing (91). A roller (932) is installed on the right side of the inner cavity of the box (931) via a bearing. A third gear (933) that meshes with the first gear (921) is installed at the front end of the roller (932) to provide rotational power to the roller (932). A guide groove (934) is provided on the outer wall of the roller (932). A telescopic unit (935) is provided on the left front end of the box (931). A gas-liquid mixer (936) is installed on the right side of the telescopic unit (935). The two ports of the gas-liquid mixer (936) are connected to the liquid outlet of the water pump (8) and the air outlet of the air pump (11), respectively.

5. The temperature-assisted laser shock peening device according to claim 4, characterized in that, The transmission ratio between the first gear (921) and the third gear (933) is less than 1.

6. The temperature-assisted laser shock peening device according to claim 5, characterized in that, The guide groove (934) is composed of multiple folded lines distributed in an elliptical shape on the outer wall of the roller (932), and the horizontal folded lines and the oblique lines are alternately positioned.

7. The temperature-assisted laser shock peening device according to claim 6, characterized in that, The telescopic unit (935) includes a valve body (9351) installed on the left side of the front side of the box (931). The valve body (9351) has interfaces (9352) installed on both the left and right sides. The interface (9352) on the right side is installed with the gas-liquid mixer (936), and the interface (9352) on the left side is connected to the nozzle (927) through a water pipe. A valve core (9353) is inserted into the inner cavity of the valve body (9351). Several liquid outlet holes (9354) are opened on the outer wall of the valve core (9353) from front to back. One end of the traction rod (9355) is installed on the rear side of the valve core (9353). The other end of the traction rod (9355) is installed with a guide wheel (9356) that is inserted into the inner cavity of the guide groove (934). The guide wheel (9356) is in rolling connection with the guide groove (934) to prevent jamming.

8. The temperature-assisted laser shock peening device according to claim 7, characterized in that, The liquid outlet holes (9354) have two or more inner diameters and are arranged alternately.

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