A tape-free shot peening protection tool for blades with holes and a manufacturing method thereof

Abstract

The present invention belongs to the part surface treatment technology, and relates to a tape-free shot peening protection tooling for blades with holes and cavities and a manufacturing method. It includes a left metal shell, a right metal shell, a left rubber profiled protective cover, a right rubber profiled protective cover, a base, an air inlet plug, a butterfly nut, a threaded rod, and a connecting shaft; the blades, rubber profiled protective cover and metal shell of the present invention together form a complete protection structure, so that the entire no-spray zone is not impacted and infiltrated by the projectile jet, and realizes all the protection requirements of the tenon shot peening process of advanced engine blades with complex inner cavity structures. The thickness of the metal tooling is smaller than that of the traditional hard rubber base, which significantly reduces the structural interference with the blade tenon and tenon stress surface; the installation method of the tooling is simple, and the positioning points are reasonable and accurate. After the operator masters the use method, he can keep the clamping status of each blade consistent. Compared with the traditional method, this method can improve the consistency and stability of the protection effect of the no-spray zone.

Description

Technical Field

[0001] The invention belongs to a part surface treatment technology and relates to a tape-free shot blasting protection tool for a blade with a cavity having a hole and a manufacturing method. Background Art

[0002] Aircraft engine turbine blades operate in harsh environments. The tenon, the structure that secures the blade to the turbine disk, endures multiple forces, including cyclic blade loads and high-temperature combustion gas impact. This makes it susceptible to fatigue failure, making it a life-limiting component in aircraft engines and attracting significant attention. Shot peening is currently the most widely used surface strengthening technology, used in the fatigue-resistant manufacturing of key components both domestically and internationally. It is also one of the most important surface strengthening methods for turbine blades. Turbine blades can be divided into four regions: the tenon, the root, the lip, and the airfoil. The tenon is the shot peening zone, requiring high standards for shot peening uniformity. The root is a transition zone, permitted to be covered by the shot peening jet. The lip and airfoil are no-peening zones, where impact or splashing by shot can damage the surface coating. Advanced engine blades also have pores and cavities at the base of the airfoil and tenon. Shots entering the blade cavity can leave foreign matter residue and even block pores. Therefore, shot peening must consider protecting the no-peening zone and preventing shot penetration into the internal cavity.

[0003] Pre-blast protection is one of the current challenges in turbine blade shot peening. Existing processes often rely on manually applying tape to the blades or wrapping them in plastic bags to shield and protect the no-blast zones. These traditional methods suffer from low processing efficiency, tape residue, and coating shedding during tape removal. Therefore, improved pre-blast protection methods are urgently needed.

[0004] Patent CN 214560104 provides a method for protecting blades in a no-spray zone that currently does not use tape. A hard rubber base is made based on the shape of the blade, and the recessed portion of the base is made to be similar in size and shape to the blade. The blade is then directly inserted into the recessed portion of the base to provide shielding and protection for the blade and blade edge. However, this method also has obvious problems: 1) It cannot accommodate blades with crowns; 2) The rubber material is insufficiently rigid and is easily deformed by direct impact from projectiles, creating a gap between the outer periphery of the recessed portion of the base and the blade edge, causing projectiles to strike or splash the blade and damage the coating; 3) To increase the rigidity of the rubber to withstand direct impact from projectiles, the base is often too large, obstructing the tenon and resulting in insufficient reinforcement of the tenon and tenon tooth bearing surfaces; 4) Although the tooling can withstand projectile impact, it cannot prevent projectile penetration, so it is only suitable for solid, non-porous blades and has insufficient protection for high-performance, cavity-perforated blades. Summary of the Invention

[0005] The purpose of the present invention is to propose a tape-free shot peening protection tool for blades with holes and cavities and its use method, the purpose of which is to replace the protection method of manually sticking tape, effectively prevent the projectiles from hitting or splashing the blade body, and rely on good sealing to prevent the projectiles from penetrating into the inner cavity, thereby improving the pre-spray protection efficiency and solidification protection effect.

[0006] The technical solution of the present invention is: a tape-free shot peening protection tool for blades with holes and cavities, comprising a left metal shell 1, a right metal shell 2, a left rubber profiled protective sleeve 3, a right rubber profiled protective sleeve 4, a base 5, an air inlet plug 6, a butterfly nut 7, a threaded rod 8, and a connecting shaft 9; the threaded rod 8 is fixed to the left metal shell 1 through the connecting shaft 9, and the left metal shell 1 and the right metal shell 2 are integrally formed by machining, and the inner side is milled into a corresponding shape according to the outer contour of the left rubber profiled protective sleeve 3 and the right rubber profiled protective sleeve 4; threaded rod slots are respectively processed on both sides of the left metal shell 1 and the right metal shell 2; the left rubber profiled protective sleeve 3 and the right rubber profiled protective sleeve 4 are respectively placed on the inner sides of the corresponding left metal shell 1 and the right metal shell 2, and the left rubber profiled protective sleeve The protective cover 3 and the right rubber contoured protective cover 4 are made according to the shape of the blade body, edge plate and root part, and can be fitted with the above parts; the shot-peened blade is placed between the left rubber contoured protective cover 3 and the right rubber contoured protective cover 4, and the left rubber contoured protective cover 3 and the right rubber contoured protective cover 4 are closed by a snap-fit ​​structure to wrap the blade except the tenon, and the left metal shell 1 and the right metal shell 2 outside the left rubber contoured protective cover 3 and the right rubber contoured protective cover 4 are fastened by threaded rods 8 and butterfly nuts 7; the air inlet plug 6 is fixed to the top of the base 5 by welding, and the air inlet plug 6 is inserted into the air inlet on the bottom surface of the blade tenon to fix the blade and the external left rubber contoured protective cover 3, the right rubber contoured protective cover 4 and the left metal shell 1 and the right metal shell 2.

[0007] The left rubber contoured protective cover 3 and the right rubber contoured protective cover 4 are molded, and the inner sides of the left rubber contoured protective cover 3 and the right rubber contoured protective cover 4 are manufactured according to the outer contour of the blade, and are tightly fitted with the position of the blade side edge plate to form a sealed inner cavity below the position of the blade side edge plate.

[0008] The inner side of the left and right rubber contoured protective sleeves 3 and 4 corresponding to the blade edge plate is flat, and the outer side of this position is 1-2 mm wider than the inner width of the left and right metal shells 1 and 2 after they are closed.

[0009] The tops of the left and right rubber contoured protective covers 3 and 4 are molded according to the contours of the blade tenons near the root of the blade tenons. After the left and right rubber contoured protective covers 3 and 4 are combined, the inner sides of the tops are close to the root of the tenons.

[0010] The left rubber contoured protective cover 3 and the right rubber contoured protective cover 4 are made of rubber material that is elastic, wear-resistant and deformation-resistant.

[0011] The left metal shell 1 and the right metal shell 2 are integrally formed by machining, and the inner sides are milled into corresponding shapes according to the outer contours of the left rubber contoured protective cover 3 and the right rubber contoured protective cover 4. The outer surfaces of the left metal shell 1 and the right metal shell 2 close to the blade tenon are processed into bevels to reduce obstruction of the shot peening jet.

[0012] According to the aperture and shape of the air inlet at the bottom of the blade tenon, a matching air inlet plug is processed. The size of the air inlet plug is 0.2~0.3mm smaller than the air inlet to reduce the difficulty of assembly. The air inlet plug is fixed on the base with the plug head facing upward.

[0013] The left metal shell 1, the right metal shell 2, the base 5, the air inlet plug 6, the butterfly nut 7, the threaded rod 8, and the connecting shaft 9 are made of stainless steel or tool steel.

[0014] The method for manufacturing a tape-free shot peening tooling for blades with perforated cavities allows the blades to be directly mounted within the tooling. The sealed cavity formed by the left and right rubber contoured protective sleeves 3 and 4 prevents shot from penetrating into the blade pores during the shot peening process. The air inlet plug on the base 5 is compressed by gravity, preventing shot from penetrating the inner cavity through the air inlet. The housing, formed by the left and right metal shells 1 and 2, blocks the high-speed impact of shot and clamps and secures the left and right rubber contoured protective sleeves 3 and 4 within. This eliminates the complex tape protection process required before mounting the conventional shot peening tooling, saving significant time during the pre-blasting protection process and significantly improving the efficiency of the shot peening process for the blade tenon.

[0015] The method for using the tape-free shot peening protection tooling for blades with holes and cavities comprises the following steps:

[0016] Step 1: Open the tooling: Rotate and loosen the butterfly nut 8 on the tooling to separate the left metal shell 1 and the right metal shell 2;

[0017] Step 2: Blade installation: First, install the left rubber contoured protective cover 3 into the inner groove of the left metal shell 1; then place the blade basin surface into the left rubber contoured protective cover 3; then install the right rubber contoured protective cover 4 onto the back of the blade; finally, install the right metal shell 2 onto the outside of the right rubber contoured protective cover 4 and press it tightly;

[0018] Step 3: Close the tooling: Turn the threaded rod 8 so that the threaded rod 8 enters the grooves of the left metal shell 1 and the right metal shell 2, and tighten the butterfly nut 7 to clamp the left metal shell 1 and the right metal shell 2, and slightly squeeze and deform the left rubber contoured protective cover 3 and the right rubber contoured protective cover 4, completely filling the gap between the left metal shell 1 and the right metal shell 2 to achieve internal sealing;

[0019] Step 4: Install the tooling: Place the blade tenon air inlet of the tooling with the installed blade downward on the base 5, and insert the air inlet plug 6 into the blade tenon air inlet; place the base 5 at the center of the turntable of the CNC shot peening machine so that the entire tooling can rotate axially with the turntable; call the shot peening program to shot peen the blade tenon;

[0020] Step 5: Unload the tooling: After shot blasting is completed, remove the tooling from the base 5, blow the projectiles on the surface and gaps of the tooling with compressed air, rotate and loosen the butterfly nut 7, turn the threaded rod 8, remove the right metal shell 2 and the right rubber contoured protective cover 4 in turn, and take out the blade with the tenon shot blasted.

[0021] The advantages of the present invention are:

[0022] (1) The blades, rubber contoured protective sleeves and metal shell together form a complete protective structure, which protects the entire no-spray zone from the impact and penetration of the projectile jet, and realizes all the protection requirements of the shot peening process of the tenon of the advanced engine blade with a complex inner cavity structure.

[0023] (2) This method does not use any tape to protect the blade, which greatly saves the time for preparation before shot peening and removal after shot peening, greatly improves production efficiency, and significantly reduces costs;

[0024] (3) The installation method of the tooling is simple, and the positioning points are reasonable and accurate. After the operator masters the usage method, the clamping state of each blade can be basically consistent. Compared with the traditional method, this method can improve the consistency and stability of the protection effect of the no-spraying zone;

[0025] (4) The thickness of the metal tooling is smaller than that of the traditional hard rubber base, which can significantly reduce the structural interference with the blade tenon and tenon bearing surface;

[0026] (5) Tooling components such as rubber contoured protective covers and metal shells can be replaced independently, which increases the overall service life of the tooling and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the tooling of the present invention;

[0028] Figure 2 This is a schematic diagram of the base structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the upper structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the right metal shell of the present invention;

[0031] Figure 5 Schematic diagram of the improvements in process steps, time and manpower compared to the traditional method.

[0032] Among them: 1-left metal shell, 2-right metal shell, 3-left rubber contoured protective cover, 4-right rubber contoured protective cover, 5-base, 6-air inlet plug, 7-butterfly nut, 8-threaded rod, 9-connecting shaft. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings:

[0034] like Figure 1 -4, according to the corresponding blade drawings and the actual object, the left rubber profiling protective cover 3 and the right rubber profiling protective cover 4 are molded, and the inner sides of the left rubber profiling protective cover 3 and the right rubber profiling protective cover 4 are manufactured according to the outer contour of the blade, and are tightly fitted with the position of the blade side edge plate, so that a sealed inner cavity is formed below this position; the position of the inner side of the left rubber profiling protective cover 3 and the right rubber profiling protective cover 4 corresponding to the blade edge plate should be flat, and the outer side of this position should be 1~2mm larger than the inner width after the left metal shell 1 and the right metal shell 2 are tightened; the top of the left rubber profiling protective cover 3 and the right rubber profiling protective cover 4 (close to the root side of the blade tenon) should be molded according to the contour of the blade tenon. After the left rubber profiling protective cover 3 and the right rubber profiling protective cover 4 are combined, the inner side of the top should be tightly fitted with the root of the tenon. The left and right metal shells 1 and 2 are integrally machined, with their inner surfaces milled to the contours of the left and right rubber profiling covers 3 and 4. The outer surfaces of the left and right metal shells 1 and 2, near the blade tenon, are beveled. An air inlet plug is machined to match the diameter and shape of the air inlet at the bottom of the blade tenon. The plug should be 0.2-0.3mm smaller than the air inlet to simplify assembly. The plug should be secured to the base with the head facing upward.

[0035] The left rubber contoured protective cover 3 and the right rubber contoured protective cover 4 should be made of a rubber material with a certain elasticity, wear resistance and strong deformation resistance. The left metal shell 1, the right metal shell 2, the base 5, the air inlet plug 6, the butterfly nut 7, the threaded rod 8 and the connecting shaft 9 are made of stainless steel or tool steel.

[0036] (1) Open the tool: rotate and loosen the butterfly nut 8 on the tool to separate the left metal shell 1 and the right metal shell 2;

[0037] (2) Blade installation: First, install the left rubber contoured protective cover 3 into the inner groove of the left metal shell 1; then place the blade basin surface into the left rubber contoured protective cover 3; then install the right rubber contoured protective cover 4 onto the back of the blade; finally, install the right metal shell 2 onto the outside of the right rubber contoured protective cover 4 and press it tightly;

[0038] (3) Closing the tool: Turn the threaded rod 8 so that it enters the grooves of the left metal shell 1 and the right metal shell 2, and tighten the butterfly nut 7 to clamp the left metal shell 1 and the right metal shell 2. The left rubber contoured protective cover 3 and the right rubber contoured protective cover 4 are slightly squeezed and deformed, completely filling the gap between the left metal shell 1 and the right metal shell 2 to achieve internal sealing;

[0039] (4) Install the tooling: Place the tooling with the installed blade (the blade tenon air inlet is downward) on the base 5, and insert the air inlet plug 6 into the corresponding air inlet; the base 5 is placed at the center of the turntable of the CNC shot peening machine so that the entire tooling can rotate axially with the turntable; call the shot peening program to shot peen the blade tenon; the above (1) to (4) processes correspond to Figure 2 20th process in the process - tooling installation.

[0040] (5) Unloading the tool: After the shot blasting is completed, remove the tool from the base 5, blow the projectiles on the surface and gaps of the tool with compressed air, rotate and loosen the butterfly nut 7, turn the threaded rod 8, remove the right metal shell 2 and the right rubber contoured protective cover 4 in turn, and take out the blade with the tenon shot blasted. The above (5) process corresponds to Figure 2 Process 40 in the process - tooling unloading.

[0041] After the tooling was improved, the blade tenon shot peening process and the time ratio of each step saved 2 steps, 54% of time, and 7 man-hours compared with the traditional method.

[0042] The working principle of the present invention is:

[0043] The present invention forms a closed structure by rationally coordinating the metal shell, the rubber contoured protective cover and the blade structure itself, thereby preventing the impact and penetration of projectiles and eliminating the tape protection process, thereby significantly improving the shot blasting efficiency and saving costs.

[0044] First of all, the tooling used for shot peening of blade tenons has always had the problem of low fit with the blade size and large gaps between parts and tooling, so it is necessary to use plastic sealing tape to wrap it as a secondary protection, and this protection method requires a lot of manpower and working hours; the present invention introduces a rubber profiling structure into the design of the shot peening tooling, and utilizes the raised parts such as the blade edge plate, the extrusion pressure of the external metal shell and the elasticity of the rubber parts to achieve the sealing of the blade. The protection can be completed while the blade is clamped, and no other preparation work is required.

[0045] Secondly, this invention innovatively inverts the fixture's fixing method, leveraging the weight of the blades and fixture to tightly plug and compact the air inlet at the bottom of the tenon. This solves the dilemma of previous plugging structures, which are difficult to secure and easily blown open, while adding a fastening structure would obstruct the projectile jet. The rubber contoured protective sleeve can be replaced and maintained separately, resolving the issue of rubber wear and tear in CN 214560104, which can lead to poor sealing.

[0046] Finally, the operating steps of the present invention are simple, and the operator follows the instructions to ensure that the results of each card installation are basically consistent. Compared with the traditional tape wrapping protection method, this method is less affected by the operator's operating differences and can improve the consistency and stability of the protection effect of the no-spraying zone.

[0047] Through the above working principle, the present invention can significantly improve the processing efficiency of the blade tenon shot peening process, save material and labor costs, and improve the consistency and stability of the protection effect of the no-spraying zone, and solve the problems of projectile impact, penetration and obstruction interference during tenon shot peening.

[0048] Example 1:

[0049] The shot-peened part is a high-pressure turbine blade without a shroud, but with a ceramic thermal barrier coating and film holes on the blade body. After the blade is clamped according to the instructions, the tenon is shot-peened with ceramic shot at a pressure of 0.12-0.24 MPa and a coverage rate of 100%-400%. After shot-peening, the blade is removed and the shot-peened area, the no-peening zone, and the sealed protective cavity are inspected. The shot-peened area is uniformly covered with craters, with no leaks. No overspray is observed in the no-peening zone. Endoscopic inspection reveals no shot that has entered the peening process.

[0050] Example 2:

[0051] The shot-peened parts were low-pressure turbine blades with shrouds and blade bodies with antioxidant coatings and exhaust holes. After the blades were mounted according to the instructions, the tenons were shot-peened. The shot-peening method used two guns with fixed positions and angles, and the blades rotated. Ceramic shot was used, with a pressure of 0.10-0.20 MPa and a coverage rate of 100-300%. After shot-peening, the blades were removed and the shot-peening area, no-peening zone, and sealed protective cavity were inspected. All areas of the shot-peening area were evenly covered with craters, with no leaks. No signs of overspray were found in the no-peening zone. Endoscopic inspection revealed no shot that had entered the cavity during the shot-peening process. After continuously shot-peening a batch of 90 blades, no significant decrease in the sealing performance of the tooling was observed.

Claims

1. A tape-free shot peening protection tool for blades with holes and cavities, characterized in that: The invention comprises a left metal shell (1), a right metal shell (2), a left rubber profile protective sleeve (3), a right rubber profile protective sleeve (4), a base (5), an air inlet plug (6), a butterfly nut (7), a threaded rod (8), and a connecting shaft (9); the threaded rod (8) is fixed to the left metal shell (1) through the connecting shaft (9); the left metal shell (1) and the right metal shell (2) are integrally formed by machining, and the inner sides thereof are milled into corresponding shapes according to the outer contours of the left rubber profile protective sleeve (3) and the right rubber profile protective sleeve (4); threaded rod slots are respectively processed on both sides of the left metal shell (1) and the right metal shell (2); the left rubber profile protective sleeve (3) and the right rubber profile protective sleeve (4) are respectively placed on the inner sides of the corresponding left metal shell (1) and the right metal shell (2); the left rubber profile protective sleeve (3) and the right rubber profile protective sleeve (4) are respectively milled into corresponding shapes according to the outer contours of the left rubber profile protective sleeve (3) and the right rubber profile protective sleeve (4). The shaped protective cover (4) is made according to the shape of the blade body, edge plate and extended root part, and can be fitted with the above parts; the shot-peened blade is placed between the left rubber shaped protective cover (3) and the right rubber shaped protective cover (4); the left rubber shaped protective cover (3) and the right rubber shaped protective cover (4) are closed by a snap-fit ​​structure to wrap the blade except the tenon; the left metal shell (1) and the right metal shell (2) outside the left rubber shaped protective cover 3 and the right rubber shaped protective cover 4 are fastened by a threaded rod (8) and a butterfly nut (7); the air inlet plug (6) is fixed to the top of the base (5) by welding, and the air inlet plug (6) is inserted into the air inlet on the bottom surface of the tenon of the blade to fix the blade and the left rubber shaped protective cover (3), the right rubber shaped protective cover (4) and the left metal shell (1) and the right metal shell (2) outside.

2. The tape-free shot peening protection tool for blades with holes and cavities according to claim 1 is characterized in that: The left rubber profiling protective cover (3) and the right rubber profiling protective cover (4) are molded, and the inner sides of the left rubber profiling protective cover (3) and the right rubber profiling protective cover (4) are manufactured according to the outer contour of the blade, and are closely fitted with the position of the blade side edge plate, so that a sealed inner cavity is formed below the position of the blade side edge plate.

3. The tape-free shot peening protection tool for blades with holes and cavities according to claim 1 is characterized in that: The position of the blade edge plate corresponding to the inner side of the left rubber profiling protective sleeve (3) and the right rubber profiling protective sleeve (4) is a plane, and the outer side of the position is 1 more than the inner width of the left metal shell (1) and the right metal shell (2) after being tightened. ~ 2mm.

4. The tape-free shot peening protection tool for blades with holes and cavities according to claim 1 is characterized in that: The tops of the left rubber profiling protective sleeve (3) and the right rubber profiling protective sleeve (4) are molded according to the contour of the blade tenon near the root of the blade tenon. After the left rubber profiling protective sleeve (3) and the right rubber profiling protective sleeve (4) are combined, the inner sides of the tops are closely attached to the root of the tenon.

5. The tape-free shot peening protection tool for blades with holes and cavities according to claim 1 is characterized in that: The left rubber contoured protective cover (3) and the right rubber contoured protective cover (4) are made of a rubber material that is elastic, wear-resistant and deformation-resistant.

6. The tape-free shot peening protection tool for blades with holes and cavities according to claim 1 is characterized in that: The left metal shell (1) and the right metal shell (2) are integrally formed by machining, and the inner sides thereof are milled into corresponding shapes according to the outer contours of the left rubber contoured protective sleeve (3) and the right rubber contoured protective sleeve (4). The outer surfaces of the left metal shell (1) and the right metal shell (2) on the side close to the blade tenon are processed into inclined surfaces to reduce obstruction of the shot peening jet.

7. The tape-free shot peening protection tool for blades with holes and cavities according to claim 1 is characterized in that: According to the aperture and shape of the air inlet at the bottom of the blade tenon, a matching air inlet plug is processed. The size of the air inlet plug is 0.2 smaller than that of the air inlet. ~ 0.3mm to reduce assembly difficulty, the air inlet plug is fixed on the base with the plug facing upwards.

8. The tape-free shot peening protection tool for blades with holes and cavities according to claim 1 is characterized in that: The left metal shell (1), the right metal shell (2), the base (5), the air inlet plug (6), the butterfly nut (7), the threaded rod (8), and the connecting shaft (9) are made of stainless steel or tool steel.

9. The method for manufacturing a tape-free shot peening protection tool for blades with holes according to any one of claims 1 to 8, characterized in that: The blade can be directly mounted in the tooling; the closed cavity formed by the left rubber profiling protective cover (3) and the right rubber profiling protective cover (4) can prevent the projectile from penetrating into the air holes of the blade body during the shot peening process; the air inlet plug on the base (5) is pressed tightly under the action of gravity to prevent the projectile from penetrating into the inner cavity from the air inlet; the shell formed by the left metal shell (1) and the right metal shell (2) can block the high-speed impact of the projectile and clamp and fix the left rubber profiling protective cover (3) and the right rubber profiling protective cover (4) inside.

10. The method for using the tape-free shot peening protection tool for blades with holes according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Open the tooling: rotate and loosen the butterfly nut (7) on the tooling to separate the left metal shell (1) and the right metal shell (2); Step 2: Blade installation: first install the left rubber profiled protective cover (3) into the inner groove of the left metal shell (1); then place the blade basin surface into the left rubber profiled protective cover (3); then install the right rubber profiled protective cover (4) onto the back of the blade; finally, install the right metal shell (2) onto the outside of the right rubber profiled protective cover (4) and press it tightly; Step 3: Close the tooling: rotate the threaded rod (8) so that the threaded rod (8) enters the grooves of the left metal shell (1) and the right metal shell (2), and tighten the butterfly nut (7) so that the left metal shell (1) and the right metal shell (2) are clamped, and the left rubber contoured protective sleeve (3) and the right rubber contoured protective sleeve (4) are slightly squeezed and deformed, and the gap between the left metal shell (1) and the right metal shell (2) is completely filled to achieve internal sealing; Step 4: Install the tooling: Place the blade tenon air inlet of the tooling with the installed blade downward on the base (5), and insert the air inlet plug (6) into the blade tenon air inlet; place the base (5) at the center of the turntable of the CNC shot peening machine so that the entire tooling can rotate axially with the turntable; call the shot peening program to shot peen the blade tenon; Step 5: Unloading the tool: After the shot blasting is completed, remove the tool from the base (5), blow the projectiles on the tool surface and gaps with compressed air, rotate and loosen the butterfly nut (7), turn the threaded rod (8), remove the right metal shell (2) and the right rubber contoured protective cover (4) in turn, and take out the blade with the tenon shot blasted.

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