Double-sided shot blasting processing device and method for blisk of gas compressor

Abstract

The invention relates to the technical field of blisk machining, in particular to a gas compressor blisk double-face shot blasting machining device and method.The gas compressor blisk double-face shot blasting machining device comprises a rotary table, the movable end of the rotary table is detachably connected with a tool clamp, and the tool clamp is used for clamping and fixing a blisk to be machined; shot spray guns are arranged on the two sides of the rotary table respectively; during machining, the rotary table drives the blisk to be machined to rotate to the position between the shot spray guns, a spray head of one shot spray gun is right opposite to the blade basin side of the blisk to be machined, and a spray head of the other shot spray gun is right opposite to the blade back side of the blisk to be machined. According to the device, the to-be-machined blisk is driven by the rotary table to rotate to the position between the shot blasting guns, shot blasting machining can be carried out on the blade basin side and the blade back side of the blisk at a time, repeated clamping and positioning are not needed, the machining period of a single blisk is shortened, it is guaranteed that the blade profile precision of the blisk meets the design requirement, and the machining efficiency is improved. The problems that in the prior art, blisk shot peening strengthening is low in efficiency and poor in quality are solved.

Description

Technical Field

[0001] This invention relates to the field of bladed disk processing technology, specifically to a double-sided shot peening device and method for integral bladed disks of compressors. Background Technology

[0002] In the modern aviation industry, the aero-engine, as the "heart" of an aircraft, directly determines key indicators such as flight performance, safety, and combat effectiveness. The integral bladed disk, a crucial rotor component in advanced aero-engines, plays an indispensable role in engine operation. It not only undertakes the critical tasks of transmitting power and converting energy, but also has a profound impact on the engine's aerodynamic performance, efficiency, and stability.

[0003] With the continuous development of aviation technology, the performance requirements for aero engines are becoming increasingly stringent. Higher thrust-to-weight ratio, lower fuel consumption rate, and longer service life have become core objectives in aero engine research and development and manufacturing. The reliability and fatigue resistance of integral bladed disks (IBDs) are key factors in achieving these objectives. In the complex and harsh operating environment of aero engines, IBDs must withstand various extreme conditions such as high temperature, high pressure, high speed, and alternating loads. Any minor structural defect or performance deficiency can lead to serious consequences, even engine failure, thereby threatening flight safety. Therefore, improving the reliability and fatigue resistance of IBDs has become a crucial problem urgently needing to be solved in the field of aero engine manufacturing.

[0004] Shot peening, as an effective surface treatment process, has shown great potential in extending the fatigue life and improving the service reliability of integral bladed disks (IBDs). This technology involves blasting high-speed shot onto the surface of the IBD, causing plastic deformation and forming a reinforced layer with residual compressive stress. This reinforced layer effectively inhibits crack initiation and propagation, improves the material's fatigue resistance, and thus extends the service life of the IBD.

[0005] Traditional shot peening for integral bladed disks primarily employs a single-sided shot peening method. The basic procedure involves placing the part horizontally on a worktable and first shot peening the upward-facing blade surface (blade facet or blade back). After this side is peened, the part is flipped over, and the unpeened blade surface is then shot peened – a process known as blade facet / blade back split-face peening. This method requires frequent flipping, necessitating frequent simulations and tooling changes after each flip. Simulations ensure accuracy and consistency, while tooling changes accommodate the different shot peening requirements. These additional operations not only increase complexity and time costs but also increase the risk of errors and inconsistencies, impacting processing efficiency. Furthermore, split-face peening leads to uneven deformation between the first and second shot-peened surfaces. The impact of the shot during peening causes plastic deformation on the blade surface. In single-sided shot peening, the surface peened first is the first to be impacted by the shot and deform. When the part is flipped over and the other side is shot peened, the deformation of the first-peened surface is already largely fixed, while the deformation of the second-peened surface occurs based on the deformation of the first surface. This sequential deformation process leads to inconsistent deformation levels on the two surfaces, resulting in blade profile deviations. This can cause unstable airflow in the engine, reduce engine performance, and may even lead to vibration, noise, and other malfunctions, seriously affecting the engine's service safety. Therefore, solving the problems of low processing efficiency and blade profile deviations in existing technologies has become crucial for the further development of integral bladed disk shot peening strengthening technology. Summary of the Invention

[0006] To address the problems of low efficiency and poor quality in shot peening of integral bladed disks in existing technologies, this invention provides a double-sided shot peening device and method for integral bladed disks of compressors.

[0007] To achieve the above objectives, the present invention employs the following technical solution: This invention provides a double-sided shot peening device for integral bladed disks of compressors, including a turntable. The moving end of the turntable is detachably connected to a tooling fixture for clamping and fixing the integral bladed disk to be processed. Shot guns are respectively arranged on both sides of the turntable. During processing, the turntable drives the integral bladed disk to be processed to rotate between the shot guns, with the nozzle of one shot gun facing the blade basin side of the integral bladed disk to be processed, and the nozzle of the other shot gun facing the blade back side of the integral bladed disk to be processed.

[0008] Optionally, the tooling fixture includes a base plate detachably connected to the moving end of the turntable, a positioning ring and a fixing screw on the base plate, the fixing screw passing through the positioning ring and connected to the base plate; a pressure cap and a first clamping nut are provided on the fixing screw, the pressure cap can move along the axial direction of the fixing screw; the integral impeller to be processed is sleeved on the positioning ring, and one side abuts against the positioning ring and the other side abuts against the pressure cap for fixation.

[0009] Optionally, it also includes a support connected to the base plate, wherein the fixing screw passes through the positioning ring and the support to fix it to the base plate.

[0010] Optionally, both the positioning ring and the support are fixedly connected to the base plate by bolts.

[0011] Optionally, a second clamping nut is provided on the fixing screw between the support and the positioning ring.

[0012] Optionally, a gasket is provided on the side of the pressure cap near the integral impeller to be processed.

[0013] Optionally, a gasket is provided between the first clamping nut and the gland.

[0014] Optionally, the base plate is a disc-shaped base plate, and a positioning hole and a positioning groove are provided at the bottom; the moving end of the turntable is provided with a T-slot corresponding to the positioning groove and a positioning pin that cooperates with the positioning hole for centering.

[0015] Optionally, the base plate is provided with reinforcing ribs, and the positioning groove is formed on the reinforcing ribs.

[0016] The present invention also provides a processing method using the above-mentioned double-sided shot peening device for integral bladed disks of compressors, comprising: Install the integral bladed disk to be processed onto the tooling fixture, and fix the tooling fixture to the moving end of the turntable; The turntable is started to rotate the integral bladed disk to be processed from the horizontal position by 90°, so that the integral bladed disk to be processed is rotated between the shot blasting guns, with the nozzle of one shot blasting gun facing the blade basin side of the integral bladed disk to be processed, and the nozzle of the other shot blasting gun facing the blade back side of the integral bladed disk to be processed. Simultaneously, the shot blasting gun is activated to blast both the blade basin side and the blade back side of the integral bladed disk from the same position. After shot peening, the turntable is started to rotate the entire impeller to be processed to a horizontal position, thus completing the shot peening process.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a double-sided shot peening device for integral bladed disks of compressors. This device uses a turntable to rotate the integral bladed disk to be processed between shot peening guns, allowing simultaneous shot peening of both the blade head and blade back sides of the disk in one operation. This eliminates the need for repeated clamping and positioning, significantly reducing operation steps and time consumption, and substantially improving overall processing efficiency. Simultaneously, shot peening guns are positioned on both sides of the device, with one gun's nozzle facing the blade head and the other facing the blade back side during processing, achieving synchronous shot peening of both sides of the disk. Compared to traditional split-sided processing methods, this eliminates the need to complete one side before flipping to process the other, avoiding intermediate waiting and conversion processes, and greatly shortening the processing cycle of a single bladed disk. By simultaneously shot peening the blade head and blade back, this double-sided shot peening device ensures that both sides are subjected to the impact of the shot under the same process conditions, resulting in more consistent plastic deformation. This effectively reduces differences in blade profile deformation, ensuring that the blade profile accuracy meets design requirements, contributing to improved fatigue resistance and corrosion resistance of the bladed disk, and extending its service life.

[0018] The tooling fixture includes a base plate detachably connected to the moving end of the turntable. A positioning ring and a fixing screw are mounted on the base plate, with the fixing screw passing through the positioning ring and connected to the base plate. A pressure cap and a first clamping nut are provided on the fixing screw, and the pressure cap is movable axially along the fixing screw. The integral impeller to be processed is fitted onto the positioning ring, with one side abutting against the positioning ring and the other side abutting against the pressure cap for fixation. The positioning ring provides a precise positioning reference for the integral impeller to be processed. When the integral impeller is fitted onto the positioning ring, the outer dimensions of the positioning ring are highly matched to the inner hole of the impeller or a specific positioning part, ensuring accurate positioning of the impeller in the radial direction and guaranteeing processing accuracy. Through the cooperation of the fixing screw, pressure cap, and first clamping nut, reliable positioning of the integral impeller in the axial direction is achieved. After the entire impeller to be processed is fitted onto the positioning ring, one side abuts against the positioning ring, and the other side is pressed by a pressure cap that can move along the axis of the fixing screw. Then, the pressure cap is fixed in a suitable position using the first clamping nut to ensure that the impeller will not move axially during processing, thus ensuring the stability of processing operations such as shot peening and further improving processing quality and product qualification rate.

[0019] It also includes a support connected to the base plate, with the fixing screw passing through the positioning ring and the support to fix it to the base plate. The support can distribute the force on the base plate, further improving the stability of the tooling fixture.

[0020] A second clamping nut is provided on the fixing screw between the support and the positioning ring, which can further improve the stability of the tooling fixture.

[0021] The pressure cap is provided with a gasket on the side near the integral bladed disk to be processed, which can ensure the effective clamping of the integral bladed disk to be processed while avoiding unnecessary damage to the clamping surface of the integral bladed disk to be processed.

[0022] The base plate is a disc-shaped base plate with positioning holes and positioning grooves on its bottom. The moving end of the turntable is provided with a T-slot corresponding to the positioning groove and a positioning pin that mates with the positioning hole for centering. The positioning hole on the bottom of the disc-shaped base plate and the positioning pin on the moving end of the turntable cooperate to center the base plate, forming a tight and precise fit. When the tooling fixture is installed on the turntable, the positioning pin is inserted into the positioning hole, which can quickly and accurately determine the center position of the base plate, eliminating the positional deviation of the base plate in the radial direction. At the same time, the corresponding connection between the positioning groove on the bottom of the base plate and the T-slot on the moving end of the turntable can effectively prevent the base plate from shifting and shaking during the installation process, ensuring good consistency.

[0023] The base plate is provided with reinforcing ribs, and the positioning groove is formed on the reinforcing ribs. As a common means of enhancing structural strength, reinforcing ribs can significantly improve the rigidity of the base plate. The positioning groove formed on the reinforcing ribs can not only achieve a stable connection with the turntable, but also effectively reduce the overall weight of the tooling fixture.

[0024] This invention also provides a processing method using the aforementioned compressor integral bladed disk double-sided shot peening device. This method involves mounting the integral bladed disk to be processed onto a tooling fixture, fixing the tooling fixture to the moving end of a turntable; starting the turntable to rotate the integral bladed disk between the shot peening guns; and simultaneously peening both the blade head side and the blade back side of the integral bladed disk from the same position using the shot peening guns. The method is simple and eliminates the need for flipping and frequent tooling changes during processing, effectively improving processing efficiency. Furthermore, the simultaneous double-sided processing method effectively avoids uneven deformation between the first and second shot-peened surfaces caused by separate surface processing, thus improving processing quality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a double-sided shot peening device for an integral bladed disk of a compressor according to the present invention.

[0026] Figure 2 This is a partial cross-sectional view of the tooling fixture of a double-sided shot peening device for an integral bladed disk compressor according to the present invention.

[0027] Figure 3 This is a structural diagram of the base plate of the tooling fixture for a double-sided shot peening device for an integral bladed disk of a compressor according to the present invention.

[0028] Figure 4 This is a processing state diagram of the double-sided shot peening processing device for integral bladed disk of air compressor according to the present invention.

[0029] Among them, 1-turntable, 2-tooling fixture, 3-integral impeller to be processed, 4-shot spray gun, 5-base plate, 6-positioning ring, 7-fixing screw, 8-pressure cover, 9-first clamping nut, 10-support, 11-washer, 12-washer, 13-second clamping nut, 14-positioning hole, 15-positioning groove. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0036] The present invention will be further described in detail below with reference to specific embodiments. These descriptions are for explanation purposes only and are not intended to limit the scope of the invention.

[0037] See Figure 1 This invention provides a double-sided shot peening device for integral bladed disks of compressors, including a turntable 1. The moving end of the turntable 1 is detachably connected to a tooling fixture 2 for clamping and fixing the integral bladed disk 3 to be processed. Shot guns 4 are respectively arranged on both sides of the turntable 1. During processing, the turntable 1 drives the integral bladed disk 3 to be processed to rotate between the shot guns 4, with the nozzle of one shot gun 4 facing the blade basin side of the integral bladed disk 3 to be processed, and the nozzle of the other shot gun 4 facing the blade back side of the integral bladed disk 3 to be processed.

[0038] See Figure 2 The tooling fixture 2 includes a base plate 5 detachably connected to the moving end of the turntable 1. Preferably, the base plate 5 is a disc-shaped base plate with a positioning hole 14 and a positioning groove 15 at the bottom. The moving end of the turntable 1 is provided with a T-slot corresponding to the positioning groove 15 and a positioning pin that cooperates with the positioning hole 14 for centering. The base plate 5 is provided with reinforcing ribs, and the positioning groove 15 is formed on the reinforcing ribs. The base plate 5 is provided with a positioning ring 6, a support 10, and a fixing screw 7. The fixing screw 7 passes through the positioning ring 6 and the support 10 and is connected to the base plate 5. Preferably, the positioning... Both the ring 6 and the support 10 are fixedly connected to the base plate 5 by bolts. A second clamping nut 13 is provided on the fixing screw 7 between the support 10 and the positioning ring 6. A pressure cap 8 and a first clamping nut 9 are provided on the fixing screw 7. A washer 12 is provided between the first clamping nut 9 and the pressure cap 8. The pressure cap 8 can move axially along the fixing screw 7. The integral impeller 3 to be processed is sleeved on the positioning ring 6, and one side abuts against the positioning ring 6 and the other side abuts against the pressure cap 8 for fixation. Preferably, a washer ring 11 is provided on the side of the pressure cap 8 near the integral impeller 3 to be processed.

[0039] Taking a specific sentence structure as an example, the technical solution of this invention will be explained: See Figure 1This invention provides a double-sided shot peening device for integral bladed disks of compressors, comprising a dual-robot shot peening machine capable of robot interconnection and a turntable 1. Robots are positioned on both sides of the turntable, and the robots have a two-machine interlocking function. The dual-robot shot peening machine is connected to a shot blasting gun 4. The turntable 1 has a tilting function. The turntable 1 has a Φ40 locating pin and three evenly distributed locating pins with a width of 10 mm, which can be tightly connected to a fixture.

[0040] See Figure 2 and Figure 3 It also includes a fixture 2 for double-sided spraying of blades on a solid blade disc: Fixture 2 includes a base plate 5, a support 10, a positioning ring 6, a washer ring 11, a pressure cap 8, a gasket 12, a first clamping nut 9, a second clamping nut 13, and a fixing screw 7. The base plate 5 is a disc with a diameter of Φ500. Between Φ200 and Φ400, except for the six necessary reinforcing ribs, the rest is removed to reduce the weight of the entire fixture. The reinforcing ribs are 30mm wide, and three of the reinforcing ribs have 10mm wide slots cut into them to form positioning slots 15, which are used to connect with the T-slots on the turntable 1, thereby fixing the entire fixture. T-bolts can be used to tightly connect the turntable 1 to the base plate 5 through the positioning slots 15. The support 10 is bolted to the center of the fixture, and the center of the support 10 has an M12 threaded hole. The fixing screw 7 has a diameter of 12mm and its length depends on the size of the part. It has M12 threads of 50mm each at the top and bottom. The fixing screw 7 is threaded onto the support 10 and then secured with the second clamping nut 13, forming a single unit with the support 10, fixing screw 7, and second clamping nut 13. The positioning ring 6 is bolted to the base plate 5. Made of nylon to prevent scratching the part, the positioning ring has a step whose size matches the inner diameter of the part, used for positioning the integral impeller 3 to be processed. The washer ring 11 is connected to the pressure cap 8 with countersunk screws to secure the integral impeller 3 to be processed. The washer ring 11 is also made of nylon to prevent scratching the integral impeller 3.

[0041] After the turntable 1 is flipped, a vertical machining method is used. The two robotic arms on the left and right can be interlocked, meaning that the blade base and blade back of the integral bladed disk 3 to be machined can be processed simultaneously. Compared with the traditional horizontal machining method, it is not necessary to flip the parts to complete the machining of all surfaces of the blade body, which can improve the machining efficiency. At the same time, since the blade base and blade back of the integral bladed disk 3 to be machined can be shot peened at the same time, the uneven deformation caused by the Bauschinger effect can be reduced, improving the quality of the blade shape of the parts. The fixture structure is compact and easy to use.

[0042] See Figure 4 The specific processing steps described above are as follows: 1. Install the fixture: Align the Φ40 hole at the bottom of the fixture with the locating pin on the turntable to ensure that fixture 2 and turntable 1 are at the same center. Then use T-bolts to connect fixture 2 to turntable 1.

[0043] 2. Install the parts: Install the integral bladed disk 3 to be processed onto the positioning surface of the tooling fixture 2; 3. Tighten the parts: Place the pressure cover 8 against the integral impeller 3 to be processed, and then use the first clamping nut 9 to fix the integral impeller 3 to be processed, ensuring that there is no relative sliding between the tooling fixture 2, the integral impeller 3 to be processed, and the turntable 1; 4. Parts processing: During processing, the turntable 1 is rotated from a horizontal state to a vertical state, and the shot blasting guns 4 on the left and right sides work together to start shot blasting from the same position on the blade basin and blade back of the integral bladed disk 3 to be processed, until the shot blasting ends.

[0044] 5. Processing complete: Turntable 1 is rotated from vertical to horizontal, the first clamping nut is removed, and then the pressure cover 8 is removed to remove the processed integral bladed disk.

[0045] The present invention also provides a processing method using the above-mentioned double-sided shot peening device for integral bladed disks of compressors, comprising: The integral bladed disk 3 to be processed is installed on the tooling fixture 2, and the tooling fixture 2 is fixed to the moving end of the turntable 1; The start-up turntable 1 drives the integral bladed disk 3 to be processed to rotate 90° from the horizontal position, so that the integral bladed disk 3 to be processed is rotated between the shot spray guns 4, and the nozzle of one shot spray gun 4 is facing the blade basin side of the integral bladed disk 3 to be processed, and the nozzle of the other shot spray gun 4 is facing the blade back side of the integral bladed disk 3 to be processed. Start the shot blasting gun 4 to simultaneously blast the blade basin side and blade back side of the integral bladed disk 3 from the same position; After shot peening, turntable 1 is started to rotate the integral bladed disk 3 to a horizontal position, thus completing the shot peening process.

[0046] This method is simple and does not require flipping or frequent tooling changes during processing, which effectively improves processing efficiency. Furthermore, the simultaneous processing of both sides can effectively avoid the problem of uneven deformation between the first and second shot-peened surfaces caused by processing on separate surfaces, thus improving processing quality.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the technical solution of the present invention in any way. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can be modified and replaced in several simple ways, and these modifications and replacements are all within the scope of protection covered by the claims.

Claims

1. A compressor blisk double-sided shot peening device, characterized by, The application relates to a device for shot blasting a whole blade disc, which comprises a rotating table (1), a tool clamp (2) detachably connected to the moving end of the rotating table (1) and used for clamping and fixing a whole blade disc (3) to be processed, and projectile spray guns (4) arranged on the two sides of the rotating table (1).

2. The blisk dual-sided shot peening device of claim 1, wherein, The tool clamp (2) comprises a bottom plate (5) detachably connected to the moving end of the rotating table (1), a positioning ring (6) and a fixing screw rod (7) arranged on the bottom plate (5), the fixing screw rod (7) penetrates through the positioning ring (6) and is connected with the bottom plate (5), a pressure cover (8) and a first compression nut (9) are arranged on the fixing screw rod (7), the pressure cover (8) can move axially along the fixing screw rod (7), the whole blade disc (3) to be processed is sleeved on the positioning ring (6) and is fixed by abutting against one side of the positioning ring (6) and the other side of the pressure cover (8).

3. The blisk dual-sided shot peening device of claim 2, wherein, The device further comprises a support (10) connected with the bottom plate (5), the fixing screw rod (7) penetrates through the positioning ring (6) and the support (10) and is fixed with the bottom plate (5).

4. The blisk dual-sided shot peening device of claim 3, wherein, The positioning ring (6) and the support (10) are fixedly connected with the bottom plate (5) through bolts.

5. The blisk dual-sided shot peening device of claim 4, wherein, A second compression nut (13) is arranged on the fixing screw rod (7) between the support (10) and the positioning ring (6).

6. The blisk dual-sided shot peening device of claim 5, wherein, A gasket ring (11) is arranged on one side of the pressure cover (8) close to the whole blade disc (3) to be processed.

7. The blisk dual-sided shot peening device of claim 6, wherein, A gasket (12) is arranged between the first compression nut (9) and the pressure cover (8).

8. The blisk dual-sided shot peening device of claim 7, wherein, The bottom plate (5) is a disc-shaped bottom plate, and a positioning hole (14) and a positioning groove (15) are arranged at the bottom of the bottom plate (5); a T-shaped groove corresponding to the positioning groove (15) and a positioning pin matched with the positioning hole (14) are arranged on the moving end of the rotating table (1).

9. The blisk dual-sided shot peening device of claim 8, wherein, A reinforcing rib is arranged on the bottom plate (5), and the positioning groove (15) is arranged on the reinforcing rib.

10. A method of processing by using the double-sided shot peening device for blisk of a compressor according to any one of claims 1 to 9, characterized by, The device comprises the following steps: installing the whole blade disc (3) to be processed on the tool clamp (2) and fixing the tool clamp (2) with the moving end of the rotating table (1); starting the rotating table (1) to drive the whole blade disc (3) to be processed to rotate by 90 degrees from a horizontal position, so that the whole blade disc (3) to be processed is located between the projectile spray guns (4) and the nozzles of the projectile spray guns (4) are opposite to the blade pan side and the blade back side of the whole blade disc (3) to be processed; starting the projectile spray guns (4) to simultaneously spray the blade pan side and the blade back side of the whole blade disc (3) to be processed from the same position; after the shot blasting is completed, starting the rotating table (1) to drive the whole blade disc (3) to be processed to rotate back to the horizontal position, so that the shot blasting process is completed.

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