Reflection device and strengthening method based on blade disc shielding structure laser shock strengthening

Abstract

The invention belongs to a part surface treatment technology, and relates to a reflection device based on blade disc shielding structure laser shock strengthening and a strengthening method. Comprising a blade clamping robot, a blade clamping tool, a reflecting polarizer clamping robot, a laser light outlet, a light path focusing device, a reflector path support, a reflecting polarizer tool and a reflecting polarizer. After the device is adopted, the energy loss caused by reflection of laser due to an overlarge incident angle is reduced. And the condition of inconsistent effective power density caused by non-uniform laser incidence angles due to structural interference on the processed surface of the blade is improved, so that the uniform strengthening effect on the surface of a part is achieved. The problem that laser cannot reach and cannot be strengthened due to structural interference of the blade is solved. By means of the method, it can be guaranteed that the laser beam is reachable, meanwhile, through off-line programming of the part clamping robot and the polarization reflector clamping robot, the impact position of the laser beam is accurately quantified, and the laser impact strengthening process is optimized.

Description

Technical Field

[0001] The invention belongs to a part surface treatment technology and relates to a reflection device and a strengthening method based on laser shock strengthening of a blade disk shielding structure. Background Art

[0002] Aircraft engine turbine parts are cast from high-temperature alloys, with high operating temperatures and relatively low stress levels. Therefore, these parts often have problems with excessive fatigue cracks and are scrapped. Failure analysis shows that the main reason is that the area to be strengthened is constrained by the adjacent area, resulting in large cyclic thermal stress. At the same time, during the start-stop process of the engine, the temperature changes greatly, resulting in large cyclic thermal mechanical stress, which is easy to induce fatigue cracks. Laser shock peening technology is an advanced anti-fatigue surface strengthening technology that uses high power density (GW / cm 2 ), short-pulse (ns level) laser pulses irradiate the absorption layer covering the surface of metal parts, inducing plasma shock waves on the surface of the absorption layer. Through the mechanical effect of the shock wave, the surface of the part material undergoes elastic-plastic deformation, forming a deep residual compressive stress layer and a tissue strengthening layer, thereby improving the high-temperature fatigue resistance of key metal parts of aircraft engines. Laser shock strengthening has a more obvious inhibitory effect on the initiation and expansion of fatigue cracks under high temperature conditions due to its low cold working strain effect, better high-temperature thermal stability and deeper strengthening layer.

[0003] At present, in order to stabilize the laser power density and evenly strengthen the processed surface during laser shock strengthening, the laser beam is usually fixed and a six-axis robot is used to move the parts to achieve uniform overlap of the light spot on the strengthened surface. However, for parts with complex structures, the light path is inaccessible due to structural interference and laser light path obstruction between the part's own structure or the supporting robot. Therefore, patents such as CN110732777A and CN110394554A report methods of using robots to support parts for offline programming so that the processed area of ​​the parts can be uniformly scanned by laser. Although the laser is evenly arranged and accessible to the processed surface after offline programming of the above method, the laser incident angle is not consistent, resulting in inconsistent effective power density on the processed surface, which affects the uniformity of strengthening. At the same time, the angle between the beam and the processed surface is too large and most of the effective energy is reflected. Summary of the invention

[0004] The purpose of the present invention is to propose a reflection device based on the laser shock strengthening of the blade disk shielding structure and its use method, so as to improve the situation where the incident angle of the laser shock strengthening beam is too large or non-uniform due to the interference of the blade's own structure, so that the processed surface of the blade obtains a uniform strengthening layer, thereby significantly improving the fatigue performance of the blade.

[0005] The technical scheme of the present invention is: a blade shielding structure laser shock strengthening reflection device, the strengthening reflection device comprises a blade clamping robot 1, a blade clamping tool 2, a reflective polarizer clamping robot 4, a laser light outlet 5, an optical path focusing device 6, an external optical path bracket 7, a reflective polarizer tool 8 and a reflective polarizer 9, the blade clamping tool 2 is fixedly connected to the flange of the blade clamping robot 1, clamping the processed guide blade 3; the reflective polarizer tool 8 is fixedly connected to the flange of the lens clamping robot 4, and the front end of the tool supports the reflective polarizer 9 through a rotating table with a rotation angle, the purpose of which is to make the reflective polarizer 9 extend between the blades, control the polarizer posture to adjust the laser reflection direction. The laser light outlet 5 and the optical path focusing device 6 are fixedly connected to the external optical path bracket 7.

[0006] The laser beam 10 is emitted from the right side of the external optical path bracket 7, and the optical path is first changed by reflection in the optical path focusing device 6, and then the laser beam 10 is focused by the convex lens and the concave lens, and then emitted through the light outlet 5. By adjusting the angle of the reflective polarizer 9, the laser beam 10 is finally incident and focused on the blade interference structure after reflection.

[0007] The optical path focusing device 6 includes a polarizing reflector 61, a concave lens 62, a convex lens 63, a focusing motor 64, a lens moving track 65 and a transmission belt 66; the concave lens 62 and the convex lens 63 are coaxially mounted on the lens moving track 65, the concave lens 62 is fixed on the lens moving track 65, the convex lens 63 is fixedly connected to the transmission belt 66, and can move on the lens moving track 65 along with the transmission belt 66, and the focusing motor 64 drives the transmission belt 66 to rotate and drive the convex lens 63 to move. The polarizing reflector 61 and the concave lens 62 and the convex lens 63 are axially 45 degrees and the axes are coplanar, so that the laser beam is coaxial with the concave lens 62 after being reflected by the polarizing reflector 61.

[0008] The contact surface between the blade clamping fixture 2 and the triple blade 3 is made of rubber material to prevent the outer wall of the triple blade 3 from being scratched during the fastening process.

[0009] The surface of the polarizing reflector 61 is coated with a single wavelength reflective layer, which realizes total reflection of the 1064nm wavelength laser generated by the laser; the parallel laser beam is reflected by the polarizing reflector 61, refracted and diverged by the concave lens 62, and then refracted and converged by the convex lens 63; by adjusting the distance of the convex lens 63 relative to the concave lens 62, the focusing distance of the laser shock intensiveness is changed, and the focusing distance of the laser shock intensiveness is between 1000mm and 1200mm.

[0010] The surface of the reflective polarizer 9 is coated with a single wavelength reflective layer, which realizes total reflection of the 1064nm wavelength laser generated by the laser; the focal length of the laser beam after passing through the optical path focusing device 6 is f, and the focal length remains unchanged after reflection by the reflective polarizer 9, and is vertically irradiated on the interference surface of the guide blade being processed. When programming the blade clamping robot 1 and the reflective polarizer clamping robot 4, it should be ensured that the sum of the distance from the laser optical path focusing device 6 to the reflective polarizer 9 plus the distance from the reflective polarizer 9 to the part surface is equivalent to f.

[0011] The control program programming method of the blade clamping robot 1 and the reflective polarizer clamping robot 4 is as follows:

[0012] First, the laser beam, guide blade 3 and reflective polarizer 9 models are generated in the offline 3D software CATIA. The strengthening point A is selected in the guide blade 3 to be strengthened area. The normal reference line L perpendicular to the surface to be strengthened is generated through point A. The part is rotated or moved so that the reference line L and the laser beam are coplanar P. The extended reference line L intersects the laser beam at point B, which is recorded as the reflection point position. The reflective polarizer 9 is moved and rotated so that the mirror surface is perpendicular to P and point B is on the mirror surface. At this time, the position and posture of the guide blade 3 and the reflective polarizer 9 are uniquely determined. By adjusting, the sum of the distance from the laser light path focusing device 6 to the reflective polarizer 9 plus the distance from the reflective polarizer 9 to the part surface is equivalent to f, and the light path is not blocked. The positions of the two robots at this time are recorded and the next point programming is performed.

[0013] The method for using the reflection device based on the laser shock peening of the blade disk shielding structure comprises the following steps:

[0014] Step 1: Clamping of guide blades:

[0015] The blade clamping fixture 2 is fixedly connected to the flange of the blade clamping robot 1 by means of base screws. The outer edge plate of the guide blade (3) is matched with the lower end surface of the bracket of the blade clamping fixture 2. The guide blade (3) is positioned by means of four positioning pins. The two bolts on the rear side of the bracket are tightened to ensure clamping in the front-to-back direction. Finally, the four bolts on the left end cover are tightened to ensure clamping in the left-to-right direction.

[0016] Step 2: Clamping of the reflector:

[0017] The reflective polarizer tooling 8 is fixedly connected to the front end of the lens clamping robot 4 through threaded matching, and the reflective polarizer 9 is clamped to the turntable of the reflective polarizer tooling 8 through a spring clamp. The inner side of the spring clamp is made of rubber material to increase the friction with the lens, ensuring that the reflective polarizer 9 is fixedly connected to the turntable without shaking during the process implementation, and also preventing the lens from being scratched due to clamping;

[0018] Step 3: After the strengthening is completed, lift and remove the blade clamping robot 1 and the lens clamping robot 4, turn off the laser, loosen the bolts on the blade fixture 2 and remove the guide blade (3), loosen the lower end thread of the lens fixture 8, release the spring clamp, and remove the workbench adapter plate reflector 9.

[0019] The laser shock peening method of the reflector device based on the laser shock peening of the blade disk shielding structure comprises the following steps:

[0020] Step 1: Stick 3M tape on the reinforced area of ​​the guide blade (3) and evenly distribute water on the reinforced area with a water gun;

[0021] Step 2: compile a laser shot peening robot program to control the coordinated movement of the blade clamping robot 1 and the lens clamping robot 4, and adjust the focusing light path to ensure that the laser is vertically incident and focused on the strengthening surface after being emitted through the reflector;

[0022] Step 3: Turn on the laser, run the laser shock peening program, and perform uniform laser peening on the blade peening area;

[0023] Step 4 After the first round of strengthening is completed, lift and remove the blade clamping robot 1 and the lens clamping robot 4, remove the guide blade (3), tear off the used tape, re-tape the strengthening area, re-clamp the blades, and evenly distribute water again;

[0024] Step 5: Repeat step 8.3 to perform secondary strengthening on the strengthening area, and then repeat step 8.4 until the laser shock strengthening of the strengthening area of ​​the guide vane (3) is fully covered;

[0025] Step 6: Use alcohol to clean the reinforced guide blade (3) to remove the residue left by the explosion of the adhesive tape, and check whether there are any burn marks on the blade body.

[0026] The overlap rate of the guide blade laser shock strengthening is 50%, and the laser power density is 2-10GW / mm 2 .

[0027] The advantages of the present invention are:

[0028] Firstly, after being processed by this method, the laser beam on the processed surface of the blade can be incident nearly vertically, reducing the energy loss caused by the reflection of the laser due to excessive incident angle.

[0029] Secondly, after being processed by this method, the inconsistent effective power density caused by the non-uniform laser incident angle due to structural interference on the processed surface of the blade is improved, so that the surface of the part obtains a uniform strengthening effect.

[0030] Thirdly, this method solves the problem that the blades cannot be strengthened due to structural interference and the laser cannot reach them.

[0031] Fourth, this method can ensure that the laser beam is reachable, and at the same time, through offline programming of the part clamping robot and the polarization reflector clamping robot, the laser beam impact position can be accurately quantified to optimize the laser shock strengthening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the whole device;

[0033] Figure 2 A schematic diagram of the local area A;

[0034] Figure 3 Schematic diagram of focusing optical path device;

[0035] Figure 4 Schematic diagram of laser reflection principle.

[0036] Among them: 1-blade clamping robot, 2-blade clamping tooling, 3-guide blade, 4-reflective polarizer clamping robot, 5-laser light outlet, 6-optical path focusing device, 7-external optical path bracket, 8-reflective polarizer tooling, 9-reflective polarizer, 10-laser beam, 61-polarized reflector, 62-concave lens, 63-convex lens, 64-focusing motor, 65-lens moving track, 66-transmission belt. DETAILED DESCRIPTION

[0037] The present invention is described in further detail below.

[0038] A blade shielding structure laser shock strengthening reflection device, the device comprises a blade clamping robot 1, a blade clamping tool 2, a reflective polarizer clamping robot 4, a laser light outlet 5, an optical path focusing device 6, an external optical path bracket 7, a reflective polarizer tool 8 and a reflective polarizer 9, wherein the blade clamping tool 2 is fixedly connected to the flange of the blade clamping robot 1 to clamp the processed guide blade 3; the reflective polarizer tool 8 is fixedly connected to the flange of the lens clamping robot 4, and the front end of the tool supports the reflective polarizer 9 through a rotating table with a rotation angle, the purpose of which is to make the reflective polarizer 9 extend between the blades and control the polarizer posture to adjust the laser reflection direction. The laser light outlet 5 and the optical path focusing device 6 are fixedly connected to the external optical path bracket 7.

[0039] The laser beam 10 is emitted from the right side of the external optical path bracket 7, and the optical path is first changed by reflection in the optical path focusing device 6, and then the laser beam 10 is focused by the convex lens and the concave lens, and then emitted through the light outlet 5. By adjusting the angle of the reflective polarizer 9, the laser beam 10 is finally reflected and vertically incident and focused on the blade interference structure.

[0040] The optical path focusing device 6 includes a polarizing reflector 61, a concave lens 62, a convex lens 63, a focusing motor 64, a lens moving track 65 and a transmission belt 66; the concave lens 62 and the convex lens 63 are coaxially mounted on the lens moving track 65, the concave lens 62 is fixed on the lens moving track 65, the convex lens 63 is fixedly connected to the transmission belt 66, and can move on the lens moving track 65 along with the transmission belt 66, and the focusing motor 64 drives the transmission belt 66 to rotate and drive the convex lens 63 to move. The polarizing reflector 61 and the concave lens 62 and the convex lens 63 are axially 45 degrees and the axes are coplanar, so that the laser beam is coaxial with the concave lens 62 after being reflected by the polarizing reflector 61.

[0041] The contact surface between the blade clamping fixture 2 and the triple blade 3 is made of rubber material to prevent the outer wall of the triple blade 3 from being scratched during the fastening process.

[0042] The surface of the polarizing reflector 61 is coated with a single wavelength reflective layer, which realizes total reflection of the 1064nm wavelength laser generated by the laser; the parallel laser beam is reflected by the polarizing reflector 61, refracted and diverged by the concave lens 62, and then refracted and converged by the convex lens 63; by adjusting the distance of the convex lens 63 relative to the concave lens 62, the focusing distance of the laser shock intensiveness is changed, and the focusing distance of the laser shock intensiveness is between 1000mm and 1200mm.

[0043] The surface of the reflective polarizer 9 is coated with a single wavelength reflective layer, which realizes total reflection of the 1064nm wavelength laser generated by the laser; the focal length of the laser beam after passing through the optical path focusing device 6 is f, and the focal length remains unchanged after reflection by the reflective polarizer 9, and is vertically irradiated on the interference surface of the guide blade being processed. When programming the blade clamping robot 1 and the reflective polarizer clamping robot 4, it should be ensured that the sum of the distance from the laser optical path focusing device 6 to the reflective polarizer 9 plus the distance from the reflective polarizer 9 to the part surface is equivalent to f.

[0044] The control program programming method of the blade clamping robot 1 and the reflective polarizer clamping robot 4 is as follows: first, a laser beam, a guide blade 3 and a reflective polarizer 9 model are generated in the offline three-dimensional software CATIA, a strengthening point A is selected in the guide blade 3 to be strengthened area, a normal reference line L perpendicular to the surface to be strengthened is generated through point A, the part is rotated or moved so that the reference line L and the laser beam are coplanar P, the reference line L is extended and intersects the laser beam at point B, B is recorded as the reflection point position, the reflective polarizer 9 is moved and rotated so that the mirror surface is perpendicular to P and point B is on the mirror surface, at this time, the position and posture of the guide blade 3 and the reflective polarizer 9 are uniquely determined. By adjusting, the sum of the distance from the laser light path focusing device 6 to the reflective polarizer 9 plus the distance from the reflective polarizer 9 to the part surface is equal to f, and the light path is not blocked at the same time, the position of the two robots is recorded at this time, and then the next point programming is performed.

[0045] The method of using the reflection device based on the laser shock peening of the blade disk shielding structure is as follows:

[0046] Step 1: Clamping of guide blades:

[0047] The blade clamping fixture 2 is fixedly connected to the flange of the blade clamping robot 1 by means of base screws. The outer edge plate of the guide blade (3) is matched with the lower end surface of the bracket of the blade clamping fixture 2. The guide blade (3) is positioned by means of four positioning pins. The two bolts on the rear side of the bracket are tightened to ensure clamping in the front-to-back direction. Finally, the four bolts on the left end cover are tightened to ensure clamping in the left-to-right direction.

[0048] Step 2: Clamping of the reflector:

[0049] The reflective polarizer tooling 8 is fixedly connected to the front end of the lens clamping robot 4 through threaded matching, and the reflective polarizer 9 is clamped to the turntable of the reflective polarizer tooling 8 through a spring clamp. The inner side of the spring clamp is made of rubber material to increase the friction with the lens, ensuring that the reflective polarizer 9 is fixedly connected to the turntable without shaking during the process implementation, and also preventing the lens from being scratched due to clamping;

[0050] Step 3: After the strengthening is completed, lift and remove the blade clamping robot 1 and the lens clamping robot 4, turn off the laser, loosen the bolts on the blade fixture 2 and remove the guide blade (3), loosen the lower end thread of the lens fixture 8, release the spring clamp, and remove the workbench adapter plate reflector 9.

[0051] A laser shock peening method for a reflector device based on a blade disk shielding structure laser shock peening comprises the following steps:

[0052] Step 1: Stick 3M tape on the reinforced area of ​​the guide blade (3) and evenly distribute water on the reinforced area with a water gun;

[0053] Step 2: compile a laser shot peening robot program to control the coordinated movement of the blade clamping robot 1 and the lens clamping robot 4, and adjust the focusing light path to ensure that the laser is vertically incident and focused on the strengthening surface after being emitted through the reflector;

[0054] Step 3: Turn on the laser, run the laser shock peening program, and perform uniform laser peening on the blade peening area;

[0055] Step 4 After the first round of strengthening is completed, lift and remove the blade clamping robot 1 and the lens clamping robot 4, remove the guide blade (3), tear off the used tape, re-tape the strengthening area, re-clamp the blades, and evenly distribute water again;

[0056] Step 5: Repeat step 8.3 to perform secondary strengthening on the strengthening area, and then repeat step 8.4 until the laser shock strengthening of the strengthening area of ​​the guide vane (3) is fully covered;

[0057] Step 6: Use alcohol to clean the reinforced guide blade (3) to remove the residue left by the explosion of the adhesive tape, and check whether there are any burn marks on the blade body.

[0058] The overlap rate of laser shock strengthening for guide blades is 50%. The laser power density is 2 to 10 GW / mm 2 .

[0059] The working principle of the present invention is:

[0060] Laser shock peening technology is a new type of surface strengthening treatment method. Its principle is to use the mechanical effect of laser to generate high pressure and high strain rate impact force, which can cause plastic deformation on the surface of nickel-based high-temperature alloy, forming a high-amplitude residual compressive stress distribution and a deep tissue hardening layer with a depth of 0.1mm to 1mm, which is conducive to improving the resistance to fatigue crack initiation and early crack propagation, thereby improving the overall high-temperature fatigue performance of parts. Through the coordinated offline programming of the part clamping robot and the reflector clamping robot, the laser beam can be reflected by the polarized reflector and irradiated vertically on the surface of the processed part, solving the problem of inconsistent incident angles or inaccessible light in the interference structure laser shock.

[0061] Example:

[0062] The processing area in this embodiment is the upper edge plate area of ​​the blade, which is interfered by the lower edge plate of the blade and the blade body structure. The laser cannot be incident vertically.

[0063] First, the blade fixture 2 is fixedly connected to the flange of the blade clamping robot 1 through the base screws, the outer edge plate of the guide blade (3) is matched with the lower end surface of the bracket of the blade fixture 2, and the guide blade (3) is positioned by four positioning pins, and the two bolts on the rear side of the bracket are tightened to ensure the front-to-back direction clamping. Finally, the four bolts on the left end cover are tightened to ensure the left-right direction clamping. Secondly, the lens fixture 8 is fixedly connected to the front end of the lens clamping robot 4 through threaded matching, and the reflector 9 is clamped to the turntable of the lens fixture 8 through a spring clamp. The inner side of the spring clamp is made of rubber material to increase the friction with the lens, so as to ensure that the reflector 9 and the turntable are fixedly connected without shaking during the process implementation, and at the same time, it can also prevent the lens from being scratched by clamping.

[0064] Then, 3M tape was pasted on the blade strengthening area and water was evenly distributed on the strengthening area with a water gun. The laser shot peening robot program and the lens clamping robot program were compiled to control the coordinated movement of the blade clamping robot 1 and the lens clamping robot 4, and the focusing optical path was adjusted to ensure that the laser was vertically incident and focused on the strengthening surface after being emitted through the reflector. The laser was turned on and the laser shock strengthening program was run. The laser power density was 6GW / cm 2 The blade strengthening area is uniformly laser strengthened with a process parameter of 50% overlap rate.

[0065] After strengthening is completed, lift and remove the blade clamping robot 1 and the lens clamping robot 4, turn off the laser, loosen the bolts on the blade fixture 2 and remove the guide blade (3), loosen the lower end thread of the lens fixture 8, release the spring clamp, and remove the workbench adapter plate reflector 9.

[0066] The reinforced guide blades (3) are cleaned with alcohol to remove the residues left by the explosion of the adhesive tape, the blade body is checked for burn marks, and the blades are packed.

Claims

1. A reflector device based on laser shock peening of a blade disk shielding structure, characterized in that: The enhanced reflection device comprises a blade clamping robot (1), a blade clamping tool (2), a reflective polarizer clamping robot (4), a laser light outlet (5), an optical path focusing device (6), an external optical path bracket (7), a reflective polarizer tool (8) and a reflective polarizer (9); the blade clamping tool (2) is fixedly connected to the flange of the blade clamping robot (1) to clamp the processed guide blade (3); the reflective polarizer tool (8) is fixedly connected to the flange of the lens clamping robot (4), and the front end of the tool supports the reflective polarizer (9) through a turntable with a rotation angle, so that the reflective polarizer (9) can be extended into between the blades to control the posture of the polarizer to adjust the laser reflection direction. The laser light outlet (5) and the optical path focusing device (6) are fixedly connected to the external optical path bracket (7); the laser light beam (10) is emitted from the right side of the external optical path bracket (7), and the optical path is first changed by reflection in the optical path focusing device (6), and then the laser light beam (10) is focused by a convex lens and a concave lens, and then emitted through the light outlet (5). By adjusting the angle of the reflective polarizer (9), the laser light beam (10) is finally reflected and vertically incident and focused on the blade interference structure.

2. The reflector device based on laser shock peening of a blade disk shielding structure according to claim 1, characterized in that: The optical path focusing device (6) comprises a polarizing reflector 61, a concave lens 62, a convex lens 63, a focusing motor 64, a lens moving track 65 and a transmission belt 66; the concave lens 62 and the convex lens 63 are coaxially mounted on the lens moving track 65, the concave lens 62 is fixed on the lens moving track 65, the convex lens 63 is fixedly connected to the transmission belt 66 and can move on the lens moving track 65 along with the transmission belt 66, and the focusing motor 64 drives the transmission belt 66 to rotate and drive the convex lens 63 to move. The polarizing reflector 61 and the concave lens 62 and the convex lens 63 are axially 45 degrees and the axes are coplanar, so that the laser beam is coaxial with the concave lens 62 after being reflected by the polarizing reflector 61.

3. The reflector device based on laser shock peening of a blade disk shielding structure according to claim 1, characterized in that: The contact surface between the blade clamping tool (2) and the triple blade (3) is made of rubber material, so as to prevent the outer wall of the triple blade (3) from being scratched during the tightening process.

4. The reflector device based on laser shock peening of blade shielding structure according to claim 2 is characterized in that: The surface of the polarizing reflector 61 is coated with a single wavelength reflective layer, which realizes total reflection of the 1064nm wavelength laser generated by the laser; the parallel laser beam is reflected by the polarizing reflector 61, refracted and diverged by the concave lens 62, and then refracted and converged by the convex lens 63; by adjusting the distance of the convex lens 63 relative to the concave lens 62, the focusing distance of the laser shock intensiveness is changed, and the focusing distance of the laser shock intensiveness is between 1000mm and 1200mm.

5. The reflector device based on laser shock peening of blade shielding structure according to claim 1 is characterized in that: The surface of the reflective polarizer (9) is coated with a single wavelength reflective layer, which realizes total reflection of the 1064nm wavelength laser generated by the laser; the focal length of the laser beam after passing through the optical path focusing device (6) is f, and the focal length remains unchanged after being reflected by the reflective polarizer (9), and is vertically irradiated on the interference surface of the guide blade to be processed; and when programming the blade clamping robot (1) and the reflective polarizer clamping robot (4), it should be ensured that the sum of the distance from the laser optical path focusing device (6) to the reflective polarizer (9) plus the distance from the reflective polarizer (9) to the surface of the part is equivalent to f.

6. According to the reflection device based on laser shock peening of blade shielding structure according to claims 1 and 5, the control program programming method of the blade clamping robot (1) and the reflection polarizer clamping robot (4) is: First, a laser beam, a guide blade (3) and a reflective polarizer (9) model are generated in the offline three-dimensional software CATIA. A strengthening point A is selected in the guide blade (3) to be strengthened area. A normal reference line L perpendicular to the surface to be strengthened is generated through point A. The part is rotated or moved so that the reference line L and the laser beam are coplanar P. The reference line L is extended and intersects the laser beam at point B, which is recorded as the reflection point position. The reflective polarizer (9) is moved and rotated so that the mirror surface is perpendicular to P and point B is on the mirror surface. At this time, the position and posture of the guide blade (3) and the reflective polarizer (9) are uniquely determined. By adjusting so that the sum of the distance from the laser light path focusing device (6) to the reflective polarizer (9) plus the distance from the reflective polarizer (9) to the part surface is equal to f, and the light path is not blocked, the positions of the two robots are recorded at this time and the next point programming is performed.

7. The method for using the reflection device based on the laser shock peening of the blade disk shielding structure according to any one of claims 1 to 6, characterized in that: Here are the steps: Step 1: Clamping of guide blades: The blade clamping tool (2) is fixedly connected to the flange of the blade clamping robot (1) by means of base screws, the outer edge plate of the guide blade (3) is matched with the lower end surface of the bracket of the blade clamping tool (2), the guide blade (3) is positioned by means of four positioning pins, the two bolts on the rear side of the bracket are tightened to ensure the front-to-back direction clamping, and finally the four bolts on the left end cover are tightened to ensure the left-to-right direction clamping; Step 2: Clamping of the reflector: The reflective polarizer tooling (8) is fixedly connected to the front end of the lens clamping robot (4) by means of threaded fittings, and the reflective polarizer (9) is clamped to the turntable of the reflective polarizer tooling (8) by means of a spring clamp, the inner side of the spring clamp is made of rubber material, which increases the friction with the lens, ensures that the reflective polarizer (9) is fixedly connected to the turntable without shaking during the process implementation, and also prevents the lens from being scratched due to clamping; Step 3: After strengthening is completed, lift and remove the blade clamping robot (1) and the lens clamping robot (4), turn off the laser, loosen the bolts on the blade fixture (2) and remove the guide blade (3), loosen the thread on the lower end of the lens fixture (8), release the spring clamp, and remove the workbench adapter plate reflector (9).

8. The laser shock peening method according to any one of claims 1 to 6, characterized in that: Here are the steps: Step 1, stick 3M tape on the reinforced area of ​​the guide blade (3) and evenly distribute water in the reinforced area with a water gun; Step 2, compile a laser shot peening robot program to control the blade clamping robot (1) and the lens clamping robot (4) to move in coordination, and adjust the focusing light path to ensure that the laser is vertically incident and focused on the strengthening surface after being emitted through the reflector; Step 3: Turn on the laser, run the laser shock peening program, and perform uniform laser peening on the blade peening area; Step 4: After the first round of strengthening is completed, lift and remove the blade clamping robot (1) and the lens clamping robot (4), remove the guide blade (3), tear off the used tape, re-tape the strengthening area, re-clamp the blades, and evenly distribute water again; Step 5, repeat step 8.3 to perform secondary strengthening on the strengthening area, and then repeat step 8.4 until the laser shock strengthening of the strengthening area of ​​the guide vane (3) is fully covered; Step 6: Use alcohol to clean the reinforced guide blade (3) to remove the residue left by the explosion of the adhesive tape, and check whether there are any burn marks on the blade body.

9. The laser shock peening method of the reflector device based on the laser shock peening of the blade disk shielding structure according to claim 8, characterized in that: The overlap rate of the guide blade laser shock strengthening is 50%, and the laser power density is 2-10GW / mm 2 .

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