Adhesive-tape-free shot blasting protection tool for perforated cavity blade and manufacturing method of adhesive-tape-free shot blasting protection tool

Abstract

The invention belongs to a part surface treatment technology, and relates to an adhesive-tape-free shot blasting protection tool for a blade with a hole cavity and a manufacturing method of the adhesive-tape-free shot blasting protection tool. Comprising a left metal shell, a right metal shell, a left rubber profiling protective sleeve, a right rubber profiling protective sleeve, a base, an air inlet plug, a butterfly nut, a threaded rod and a connecting rotating shaft. The blade, the rubber profiling protection sleeve and the metal shell jointly form a complete protection structure, so that the whole blasting forbidding area is not impacted and permeated by shot jet flow, and all protection requirements of the advanced engine blade tenon shot blasting process with a complex inner cavity structure are met. The thickness of the metal tool is smaller than that of a traditional hard rubber base, and structural interference on the stress face of the tenon and the tenon tooth of the blade is remarkably reduced; the installation mode of the tool is simple, positioning points are reasonable and accurate, after an operator masters the using method, the clamping state of each blade can be kept consistent, and compared with a traditional method, the method can improve the consistency and stability of the protection effect of the spraying forbidding area.

Description

Technical Field

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

[0002] The service environment of aircraft engine turbine blades is harsh. The tenon, as the fixing structure of the blade and the turbine disk, bears multiple effects such as the cyclic load of the blade and the high temperature impact of the gas. It is prone to fatigue failure and has become one of the "life-limited parts" of aircraft engines, which has attracted great attention. Shot peening is currently the most widely used surface strengthening technology. It is used in the anti-fatigue manufacturing of key parts at home and abroad, and is also one of the most important surface strengthening methods for turbine blades. Turbine blades can be divided into four areas: tenon, root extension, edge plate and blade body. The tenon is the shot peening area, which has high requirements for shot peening uniformity; the root extension is a transition zone, which is allowed to be covered by the shot peening jet; the edge plate and blade body are forbidden areas. If they are hit or splashed by projectiles, it will cause damage to the surface coating, etc. For advanced engine blades, there are pores and cavities at the bottom of the blade body and tenon. The projectiles enter the inner cavity of the blade to form foreign matter residues or even block the holes. Therefore, when shot peening, the protection of the forbidden area and the penetration of projectiles into the inner cavity should be considered.

[0003] Pre-blasting protection is one of the difficulties in the current turbine blade shot peening process. The existing process mostly uses methods such as manually pasting tape to cover the blade body and wrapping it with plastic bags to achieve shielding protection of the prohibited spraying area. The traditional method has problems such as low processing efficiency, tape residue, and coating shedding when the tape is removed. Therefore, it is urgent to improve the pre-blasting protection method.

[0004] Patent CN 214560104 provides a method for protecting the no-spray zone of blades that does not currently use tape. According to the shape of the blade body, a hard rubber base is made, and the concave part of the base is made to be similar in size and shape to the blade body. The blade body is directly inserted into the concave part of the base to achieve shielding and protection of the blade body and the edge plate. However, this method also has obvious problems: 1) It is impossible to mount blades with blade crowns; 2) The rubber material is not rigid enough, and is directly impacted by projectiles, which is easy to deform, so that a gap is formed between the outer periphery of the concave part of the base and the blade edge plate, causing the projectile to hit or splash the blade body and damage the coating; 3) In order to increase the rigidity of the rubber to withstand the direct impact of the projectile, the size of the base is often too large, which blocks and interferes with the tenon, resulting in insufficient strengthening effect on the force-bearing surface of the tenon and tenon teeth; 4) Although the tooling can withstand the impact of the projectile, it cannot prevent the projectile from penetrating, so it is only suitable for solid non-porous blades, and the protective effect for high-performance cavity blades with holes is insufficient. 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 a method of using the same, in order 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-spraying protection efficiency and the curing protection effect.

[0006] The technical solution of the present invention is: a tape-free shot peening protection tooling for blades with holes and cavities, comprising a left metal shell 1, a right metal shell 2, a left rubber profiling protective sleeve 3, a right rubber profiling 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 side is milled into a corresponding shape according to the outer contour of the left rubber profiling protective sleeve 3 and the right rubber profiling 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 profiling protective sleeve 3 and the right rubber profiling protective sleeve 4 are respectively arranged on the inner sides of the corresponding left metal shell 1 and the right metal shell 2, and the left rubber profiling protective sleeve 4 is respectively arranged on the inner sides of the left metal shell 1 and the right metal shell 2. The protective sleeve 3 and the right rubber contoured protective sleeve 4 are 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 contoured protective sleeve 3 and the right rubber contoured protective sleeve 4, and the left rubber contoured protective sleeve 3 and the right rubber contoured protective sleeve 4 are closed by a snap-fit ​​structure to wrap the parts of the blade except the tenon, and the left metal shell 1 and the right metal shell 2 outside the left rubber contoured protective sleeve 3 and the right rubber contoured protective sleeve 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 sleeve 3, the right rubber contoured protective sleeve 4 and the left metal shell 1 and the right metal shell 2.

[0007] 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 to form a sealed inner cavity below the position of the blade side edge plate.

[0008] The position of the inner side of the left rubber contoured protective cover 3 and the right rubber contoured protective cover 4 corresponding to the blade edge plate is a plane, and the outer side of this position is 1-2 mm wider than the inner width of the left metal shell 1 and the right metal shell 2 after being closed;

[0009] The top of the left rubber profiling protective cover 3 and the right rubber profiling protective cover 4 are molded according to the contour of the blade tenon near the root 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 is close to the root of the tenon.

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

[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 inclined surfaces to reduce the 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 manufacturing method of the tape-free shot peening protection tooling for the hollow blade with holes is that the blade can be directly mounted in the tooling, and the closed cavity composed of the left rubber profiling protective cover 3 and the right rubber profiling protective cover 4 can prevent the projectile from penetrating into the pores 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 composed of 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. The above can eliminate the complicated tape protection process before the traditional shot peening tooling is mounted, save a lot of pre-peening protection process time, and greatly improve the shot peening process efficiency of the blade tenon.

[0015] The method for using the tape-free shot peening protection tooling for the blade with a hole cavity 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 clamping: first install the left rubber contoured protective cover 3 into the inner groove of the left metal shell 1; then put 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 outer side of the right rubber contoured protective cover 4 and press it tightly;

[0018] 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 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, so as to completely fill the gap between the left metal shell 1 and the right metal shell 2, and realize 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: Unloading the tooling: After shot peening is completed, remove the tooling from the base 5, blow away the shot 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 peened.

[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-spraying zone from the impact and penetration of the projectile jet, thus meeting all the protection requirements of the shot peening process for the tenon of advanced engine blades with complex internal cavity structures.

[0023] (2) This method does not use any tape to protect the blade body, 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 It 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 It 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 the process steps, time and manpower of the method of the present invention compared with 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 is 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, the inner side 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 wider than the inner width of the left metal shell 1 and the right metal shell 2 after being 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, and 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 close to the root of the tenon. The left metal shell 1 and the right metal shell 2 are integrally formed by machining, and the inner side is milled out into corresponding shapes according to the outer contours of the left rubber profiling protective cover 3 and the right rubber profiling protective cover 4. The outer surface of the left metal shell 1 and the right metal shell 2 near the blade tenon should be processed into a bevel. According to the aperture and hole 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 should be 0.2~0.3mm smaller than the air inlet to reduce the difficulty of assembly. The air inlet plug should be fixed on the base with the plug head facing up.

[0035] The left rubber contoured protective cover 3 and the right rubber contoured protective cover 4 should be made of a rubber material with 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 tooling: rotate and loosen the butterfly nut 8 on the tooling to separate the left metal shell 1 and the right metal shell 2;

[0037] (2) Blade clamping: first install the left rubber contoured protective cover 3 into the inner groove of the left metal shell 1; then put 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 outer side of the right rubber contoured protective cover 4 and press it tightly;

[0038] (3) Closing the tooling: rotating the threaded rod 8 to make it enter the grooves of the left metal shell 1 and the right metal shell 2, tightening 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 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, so as to achieve internal sealing;

[0039] (4) Installing the tooling: Place the tooling with the installed blade (with the blade tenon air inlet facing downward) on the base 5, and insert the air inlet plug 6 into the corresponding 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; the above processes (1) to (4) correspond to Figure 2 20 steps in the process - tooling installation.

[0040] (5) Unloading the tool: After the shot peening is completed, remove the tool from the base 5, blow the shot 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 contour protection cover 4 in turn, and take out the blade with the tenon shot peened. The above process (5) 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 proportion of each step saved 2 steps, 54% of time, and 7 man-times compared with the traditional method.

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

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

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

[0045] Secondly, the present invention innovatively inverts the tool fixing method, and uses the deadweight of the blade and tool to plug and compact the air inlet at the bottom of the tenon, solving the dilemma that similar plugging hole structures in the past are difficult to fix and easy to be blown open, while adding a fastening structure will block the projectile jet. The rubber contoured protective cover can be replaced and maintained separately, solving the problem of poor sealing due to impact wear of the rubber in the CN 214560104 patent.

[0046] Finally, the operating steps of the present invention are simple, and the operator follows the instructions to ensure that the results of each 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] Embodiment 1:

[0049] The shot peening part is a certain type of high-pressure turbine working blade, without a blade crown, and the blade body has a ceramic thermal barrier coating and air film holes. After the blade is clamped according to the usage method, the tenon is shot peened. The projectile is a ceramic projectile, the injection pressure is 0.12~0.24MPa, and the coverage rate is 100%~400%. After shot peening, the blade is taken out and the shot peening area, the no-spraying area and the closed protection cavity are inspected: all parts of the shot peening area are evenly covered by craters, and there is no leakage; no overspray marks are found in the no-spraying area; using an endoscope for inspection, no projectiles entering due to the shot peening process are found.

[0050] Embodiment 2:

[0051] The shot peening parts are the working blades of a certain type of low-pressure turbine, with a crown, and the blade body has an anti-oxidation coating and exhaust holes. After the blades are clamped according to the instructions for use, the tenons are shot peened. The shot peening method is to fix the position and angle of the double guns and rotate the blades. The projectiles are ceramic projectiles, the injection pressure is 0.10~0.20MPa, and the coverage rate is 100%~300%. After shot peening, the blades are taken out and the shot peening area, the no-spraying area and the closed protection cavity are inspected: all parts of the shot peening area are evenly covered with craters, and there is no leakage; no overspray marks are found in the no-spraying area; using an endoscope for inspection, no projectiles entering the inner cavity due to the shot peening process are found. After continuous shot peening of a batch of 90 blades, no significant decrease in the sealing of the tooling is found.

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 profiling protective sleeve (3), a right rubber profiling 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 profiling protective sleeve (3) and the right rubber profiling 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 profiling protective sleeve (3) and the right rubber profiling protective sleeve (4) are respectively arranged on the inner sides of the corresponding ... The shaped protective cover (4) is made according to the shape of the blade body, edge plate and extended root part of the blade, 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 part of the blade except the tenon, and 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 sleeve (3) and the right rubber profiling protective sleeve (4) are molded, and the inner sides of the left rubber profiling protective sleeve (3) and the right rubber profiling protective sleeve (4) are manufactured according to the outer contour of the blade and are closely fitted to 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 positions of the blade edge plates at the inner sides of the left rubber contour protection sleeve (3) and the right rubber contour protection sleeve (4) are flat, and the outer sides of the positions are wider than the inner width of the left metal shell (1) and the right metal shell (2) after being closed. ~ 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 tooling for blades with holes and cavities according to claim 1 is characterized in that: The left rubber contour protection cover (3) and the right rubber contour protection cover (4) are made of rubber material with elasticity, wear resistance and deformation resistance.

6. The tape-free shot peening protection tooling 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 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 the obstruction of the shot peening jet.

7. The tape-free shot peening protection tool for blades with holes and cavities according to claim 1, characterized in that: According to the hole diameter and hole 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 the difficulty of assembly, 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 tooling for a hollow blade 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 sleeve (3) and the right rubber profiling protective sleeve (4) can prevent the projectile from penetrating into the pores 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 sleeve (3) and the right rubber profiling protective sleeve (4) inside.

10. The method for using the tape-free shot peening protection tooling for blades with holes and cavities 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 (8) on the tooling to separate the left metal shell (1) and the right metal shell (2); Step 2: Blade clamping: first install the left rubber contoured protective sleeve (3) into the inner groove of the left metal shell (1); then put the blade basin surface into the left rubber contoured protective sleeve (3); then install the right rubber contoured protective sleeve (4) onto the back of the blade; finally, install the right metal shell (2) onto the outer side of the right rubber contoured protective sleeve (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 contour protective cover (3) and the right rubber contour protective cover (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), so that the air inlet plug (6) is inserted into the blade tenon 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; Step 5: Unloading the tooling: After the shot peening is completed, remove the tooling from the base (5), blow the shot 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 peened.

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