Aero-engine blade sand blowing device and method

Abstract

The invention discloses an aero-engine blade sand blowing device and method, and belongs to the technical field of aero-engine blade manufacturing, the aero-engine blade sand blowing device comprises a spray gun, a clamping mechanism and a rotary table mechanism, two positioning pieces are arranged at the top of a mounting base at intervals, and a limiting cavity is defined by a protection assembly and the two positioning pieces; a limiting groove is formed in the mounting base, the middle of the clamping piece is connected with the inner wall of the limiting groove through a hinge piece so that the clamping piece can be rotationally arranged in the limiting groove, and the compression spring assembly is used for pushing the second end of the clamping piece to rotate around the hinge piece in the middle of the clamping piece so as to push the first clamping block to clamp the tenon in the limiting cavity. The blade is conveniently, rapidly and stably clamped through the clamping mechanism, the clamping mechanism and the blade are driven to rotate through the rotary table mechanism, automatic emery blowing operation is carried out in cooperation with the spray gun, influences of human factors are avoided, the sand blowing uniformity and consistency can be guaranteed, and the sand blowing quality is stable and controllable.

Description

Technical Field

[0001] This application relates to the technical field of aero-engine blade manufacturing, and in particular, to a sandblasting device for aero-engine blades. In addition, this application also relates to a sandblasting method including the above-mentioned sandblasting device for aero-engine blades. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of this application. To the extent described in this section, the work of the currently named inventors and aspects that may not constitute prior art descriptions at the time of filing are neither expressly nor impliedly considered prior art to this application.

[0003] In order to improve the working life of engine turbine blades in a high-temperature corrosive atmosphere for a long time, aluminizing methods are used to improve the oxidation resistance and corrosion resistance of the blades. The aluminizing process of engine turbine blades includes various processes such as vapor aluminizing, solid powder pack aluminizing, and slurry aluminizing. Among them, slurry aluminizing is widely used in the preparation of aluminized layers for parts such as turbine working blades, guide vanes, and integral guide vanes due to its good processability, high economic efficiency, and the ability to prepare coatings locally on workpieces.

[0004] Basic principle of slurry aluminizing: The slurry is sprayed on the surface of the metal workpiece to be coated, heated to a certain temperature, and after maintaining for an appropriate time, the active atoms of aluminum element generated by the thermal decomposition of the slurry are adsorbed on the surface of the workpiece and diffuse into the surface layer of the workpiece, thereby changing the chemical composition, structure, and properties of the surface layer of the workpiece.

[0005] The difficulty of the slurry aluminizing process is that it has relatively high requirements for the surface pretreatment of parts. For the blade 100 of a certain type of aero-engine power turbine, please refer to the attached Figure 2 ., which consists of a blade body 101, a tenon 102, and a shroud 103, and the blade body 101 and its air flow passage need to be aluminized by slurry. The material of this part is a single-crystal precision-cast superalloy, and casting mold shells, oil stains, oxides, rust, or other contaminants will adhere to the surface during the casting and machining processes. The existence of these attachments directly affects the bonding strength between the sprayed coating and the substrate. Therefore, the surface of the part must be thoroughly cleaned before spraying.

[0006] Usually, the dry blasting method with corundum sand is adopted for the surface to be sprayed for surface cleaning. The principle of this method is to use the impact and cutting action of sand grains on the surface of the part to make the surface of the part obtain a certain cleanliness and roughness, which is beneficial to the good bonding between the coating and the substrate. There are also certain defects in using manual dry blasting with corundum sand for surface pretreatment. For example, manual operation is easily affected by human factors, resulting in unstable sandblasting quality. Once the surface pretreatment of the part does not meet the requirements, the bonding between the coating and the substrate will be hindered, and defects such as blistering and cracking are likely to occur after the coating is sprayed. After diffusion, it is manifested as the peeling of the aluminized layer (please refer to the attachedFigure 3 ) or without a penetration layer (please refer to the attached Figure 4 ).

[0007] It can be seen that there are various problems in traditional manual sandblasting operations: parts are manually grasped, and a manual sandblasting operation is carried out with a spray gun held by hand. There is a lack of stable clamping of the parts. The sandblasting distance, angle, and number of sandblasting times are all controlled manually. The sandblasting quality completely depends on the operator's operation skills, resulting in uncontrollable sandblasting quality. Moreover, manual operation has low production efficiency, high labor intensity, and at the same time, the harm of sandblasting dust to the human body is also relatively large. SUMMARY OF THE INVENTION

[0008] In view of at least one of the above technical problems, the present application provides a sandblasting device for aeroengine blades, which can conveniently, quickly, and stably clamp the blades through a clamping mechanism, drive the clamping mechanism and the blades to rotate through a turntable mechanism, cooperate with a spray gun to perform an automated operation of blowing corundum sand, and is not affected by human factors. The sandblasting uniformity and consistency can be guaranteed, and the sandblasting quality is stable and controllable.

[0009] At the same time, the present application also provides a sandblasting method including the above-mentioned sandblasting device for aeroengine blades.

[0010] According to one aspect of the present application, there is provided a sandblasting device for aeroengine blades, including a spray gun for sandblasting the surface of the blades, a clamping mechanism for clamping the blades, the clamping mechanism being used to connect with a turntable mechanism, the turntable mechanism being used to drive the clamping mechanism and the blades to rotate. The blade includes a blade body, a tenon, and a shroud. The clamping mechanism includes a mounting seat, a clamping member, a positioning member, a protection component, and a compression spring component:

[0011] An installation slot is provided at the bottom of the mounting seat, and the installation slot is used to connect with the turntable mechanism. Two positioning members are arranged at intervals on the top of the mounting seat. The protection component is used to limit and protect the relative two sides of the two positioning members, and the protection component and the two positioning members enclose a limiting cavity, and the limiting cavity is used to limit the tenon of the blade;

[0012] A limiting slot is provided on the mounting seat. The middle part of the clamping member is connected to the inner wall of the limiting slot through a hinge member so that the clamping member is rotatably arranged in the limiting slot. A first clamping block is provided at the first end of the clamping member, and the first clamping block is located in the limiting cavity. A pressing part is provided at the second end of the clamping member, and the pressing part extends out of the outside of the limiting slot. The compression spring component is arranged in the limiting slot, and the compression spring component is connected to the second end of the clamping member. The compression spring component is used to push the second end of the clamping member to rotate around the hinge member in the middle of the clamping member, so as to push the first clamping block to clamp the tenon in the limiting cavity. The clamping member is used to be pressed through the pressing part to push the first clamping block away from the tenon.

[0013] In some embodiments of the present application, the clamping member further includes a body and a connecting block. The connecting block is connected to the middle of the body. The first clamping block is connected to the first end of the body, and the pressing portion is connected to the second end of the body. A connecting hole is formed in the connecting block, and the connecting block is connected to the hinge member through the connecting hole.

[0014] In some embodiments of the present application, the compression spring assembly includes a compression spring and a connecting column. The connecting column is connected to a screw hole preset on the inner wall of the limiting groove. A connecting groove is formed on the side wall of the second end of the clamping member. The first end of the compression spring is sleeved on the connecting column and abuts against the inner wall of the limiting groove, and the second end of the compression spring is in snap-fit connection with the connecting groove.

[0015] In some embodiments of the present application, the protection assembly includes a first protection member and a second protection member. The first protection member and the second protection member are arranged on opposite sides of the two positioning members. The first protection member and the second protection member and the two positioning members enclose a limiting cavity, and the first protection member and the second protection member are also used to support and limit the boss at the tenon head.

[0016] In some embodiments of the present application, the protection assembly further includes a second clamping block. At least one of the first protection member and the second protection member is provided with a limiting through hole. The second clamping block is arranged through the limiting through hole, and the second clamping block is arranged opposite to the first clamping block. The second clamping block is used to cooperate with the first clamping block to clamp and limit the tenon head.

[0017] In some embodiments of the present application, the clamping mechanism further includes a shielding member. The shielding member is arranged on the mounting seat and is used to shield the opening of the limiting groove and protect the clamping member in the limiting groove.

[0018] In some embodiments of the present application, the shielding member includes a first shielding plate and a second shielding plate connected perpendicular to each other. The first shielding plate is used to shield the first opening of the limiting groove facing the top of the mounting seat, and the second shielding plate is used to shield the second opening of the limiting groove facing the side of the mounting seat.

[0019] In some embodiments of the present application, the clamping mechanism further includes a limiting stopper. A limiting hole is formed in the side wall of the mounting seat. The limiting hole is communicated with the limiting groove. The pressing portion extends out of the limiting groove through the limiting hole. The limiting stopper is arranged at the limiting hole and is located above the pressing portion. The limiting stopper is used to limit the second end of the clamping member and cooperate with the spring assembly to clamp the relative two sides of the second end of the clamping member.

[0020] According to another aspect of the present application, there is also provided a method for sandblasting an aeroengine blade, which uses the above-mentioned aeroengine blade sandblasting device. The method for sandblasting an aeroengine blade includes the following steps:

[0021] S100. Press the pressing part of the pressing and clamping member to drive the first clamping block to move in the opposite direction of the clamping direction, insert the tenon of the blade downward into the limiting cavity, and then release the pressing part. Push the first clamping block through the compression spring assembly to clamp the limiting tenon and clamp the blade.

[0022] S200. Start the turntable mechanism to drive the clamping mechanism to rotate, so as to drive the blade to rotate through the clamping mechanism.

[0023] S300. Blow corundum sand on the blade through the spray gun in a cycle, with the number of cycles being 15 to 20 times, and the sand blowing pressure of the spray gun being 0.4 MPa.

[0024] In some embodiments of the present application, in step S200, the rotation speed of the turntable mechanism does not exceed 6 s / circle; in step S300, the spray gun blows corundum sand on the air flow channel at the tenon, the air flow channel of the blade crown, and the blade body in sequence.

[0025] The present application has the following beneficial effects:

[0026] After the sand blasting device for an aero-engine blade of the present application quickly and stably clamps the blade through the clamping mechanism, the turntable mechanism drives the clamping mechanism and the blade to rotate, and cooperates with the spray gun to uniformly blow corundum sand on the surface of the blade. The sand blasting process is not affected by human factors, and the uniformity and consistency of sand blasting can be guaranteed, and the sand blasting quality is stable and controllable. Among them, the clamping mechanism plays the role of an installation boundary through the mounting seat. The positioning member and the protection component on the mounting seat enclose to form a limiting cavity, and the tenon of the blade is limited through the limiting cavity. A rotatable clamping member is arranged in the limiting groove on the mounting seat, and a compression spring assembly is also arranged in the limiting groove. The compression spring assembly is connected to the second end of the clamping member, and the second end of the clamping member can be pushed to rotate around the hinge member in the middle of the clamping member through the compression spring assembly, so as to push the first clamping block to clamp the tenon in the limiting cavity and realize the clamping and fixing of the blade. When it is necessary to loosen and disassemble the blade, manually press the pressing part of the clamping member, and the clamping member can be pushed to rotate so that the first clamping block disengages from the tenon. Of course, when initially clamping the tenon of the blade, the pressing part of the clamping member can be pressed to make the first clamping block retreat, which is convenient for the tenon to be inserted into the limiting cavity, and then the pressing part is released, and the clamping member can be pushed to rotate under the elastic force of the spring compression assembly, so that the first clamping block can stably press against the tenon, realizing the very convenient and fast disassembly and assembly of the whole blade.

[0027] The sandblasting method for aero-engine blades in this application also has the above beneficial effects. It also includes protecting the non-sandblasted surface of the blade from being sandblasted through a clamping mechanism and the trajectory actions of sequential sandblasting during the sandblasting operation, reducing the protection and disassembly of the workpiece during manual sandblasting. At the same time, a manipulator is used to complete the actions without manual operation, greatly reducing the labor intensity of personnel. The process parameters during this sandblasting process can be preset, not affected by human factors, ensuring the uniformity and consistency of sandblasting, and the sandblasting quality is stable and controllable. The sandblasting method of this application can not only be applied to the sandblasting operation of aero-engine turbine working blades, but also be applicable to other aero-engine blade-like structural parts, with wide adaptability.

[0028] Of course, it is not necessary for any product implementing this application to achieve all the above-mentioned advantages simultaneously. In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. The following will refer to the drawings for a further detailed description of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0030] Figure 1 is a schematic diagram of the overall structure of the preferred embodiment of this application;

[0031] Figure 2 is a schematic diagram of the structure of the blade of the preferred embodiment of this application;

[0032] Figure 3 is a schematic diagram of the coating blistering of the blade in the prior art;

[0033] Figure 4 is a schematic diagram of the blade having no aluminized layer locally in the prior art;

[0034] Figure 5 is a schematic diagram of the installation of the clamping member of the preferred embodiment of this application;

[0035] Figure 6 is a schematic diagram of the installation position of the positioning member of the preferred embodiment of this application;

[0036] Figure 7 is a schematic diagram of the installation of the limit stop member of the preferred embodiment of this application;

[0037] Figure 8 is a schematic diagram of the structure of the turntable mechanism of the preferred embodiment of this application;

[0038] Legend: 100, blade; 101, blade body; 102, tenon; 103, shroud; 200, turntable mechanism; 201, turntable; 202, micro motor; 203, connecting shaft; 204, driving motor; 205, reducer; 1, mounting base; 11, mounting slot; 12, limiting hole; 13, limiting groove; 2, clamping member; 21, body; 22, connecting block; 23, first clamping block; 24, pressing part; 25, connecting groove; 3, positioning member; 31, positioning and supporting part; 32, first locking member; 4, limiting stop member; 41, second locking member; 5, protection assembly; 51, first protection member; 52, second protection member; 53, third locking member; 54, second clamping block; 6, shielding member; 61, first shielding plate; 62, second shielding plate; 63, fourth locking member; 7, compression spring assembly; 71, compression spring; 72, connecting column; 8, limiting column. Detailed implementation manners

[0039] The embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, the present application can be implemented in many different ways defined and covered by the following.

[0040] Figure 1 is the overall structural schematic diagram of the preferred embodiment of the present application; Figure 2 is the structural schematic diagram of the blade of the preferred embodiment of the present application; Figure 3 is the schematic diagram of the coating blistering of the blade in the prior art; Figure 4 is the schematic diagram of the partial aluminizing layer absence of the blade in the prior art; Figure 5 is the installation schematic diagram of the clamping member of the preferred embodiment of the present application; Figure 6 is the installation position schematic diagram of the positioning member of the preferred embodiment of the present application; Figure 7 is the installation schematic diagram of the limiting stop member of the preferred embodiment of the present application; Figure 8 is the structural schematic diagram of the turntable mechanism of the preferred embodiment of the present application.

[0041] An aeroengine blade sandblasting device includes a spray gun for sandblasting the surface of the blade 100, a clamping mechanism for clamping the blade 100. The clamping mechanism is used to connect with the turntable mechanism 200. The turntable mechanism 200 is used to drive the clamping mechanism and the blade 100 to rotate. The blade 100 includes a blade body 101, a tenon 102 and a shroud 103. The clamping mechanism includes a mounting base 1, a clamping member 2, a positioning member 3, a protection assembly 5 and a compression spring assembly 7:

[0042] The bottom of the mounting base 1 is provided with a mounting slot 11 for connecting with the turntable mechanism 200. Two positioning members 3 are arranged at intervals on the top of the mounting base 1. The protection assembly 5 is used for limiting and protecting the opposite sides of the two positioning members 3, and the protection assembly 5 and the two positioning members 3 enclose a limiting cavity for limiting the tenon 102 of the blade 100.

[0043] A limiting slot 13 is formed on the mounting base 1. The middle part of the clamping member 2 is connected to the inner wall of the limiting slot 13 through a hinge member so that the clamping member 2 is rotatably arranged in the limiting slot 13. A first clamping block 23 is arranged at the first end of the clamping member 2, and the first clamping block 23 is located in the limiting cavity. A pressing part 24 is arranged at the second end of the clamping member 2, and the pressing part 24 extends outside the limiting slot 13. A compression spring assembly 7 is arranged in the limiting slot 13 and is connected to the second end of the clamping member 2. The compression spring assembly 7 is used for pushing the second end of the clamping member 2 to rotate around the hinge member in the middle of the clamping member 2 to push the first clamping block 23 to clamp the tenon 102 in the limiting cavity. The clamping member 2 is used for being pressed through the pressing part 24 to push the first clamping block 23 away from the tenon 102.

[0044] Here, the meaning of "mounting base 1" refers to the structure connected to the turntable mechanism 200. In some embodiments, the mounting base 1 is a block structure, and the bottom of the mounting base 1 is provided with a mounting slot 11 with a square structure. The turntable mechanism 200 includes a turntable 201, and a plurality of micro motors 202 are arranged in a circular array on the turntable 201. The output shaft of the micro motor 202 vertically upward is connected to a connecting shaft 203, and the connecting shaft 203 cooperates with the mounting slot 11 to realize the connection between the mounting base 1 and the turntable mechanism 200. The turntable mechanism 200 further includes a driving motor 204, and the driving motor 204 is connected to the main shaft at the bottom of the turntable 201 through a speed reducer 205. The turntable 201 is driven to rotate by the driving motor 204, and the micro motor 202 can drive the mounting base 1 to rotate itself, so as to facilitate the automatic sandblasting operation of the spray gun on the blade 100 clamped on the mounting base 1 on the turntable 201 in sequence.

[0045] After the present application quickly and stably clamps the blade 100 through the clamping mechanism, the turntable mechanism 200 drives the clamping mechanism and the blade 100 to rotate, and cooperates with the spray gun to uniformly blow corundum sand on the surface of the blade 100. The sandblasting process is not affected by human factors, and the uniformity and consistency of sandblasting can be guaranteed. The sandblasting quality is stable and controllable. The clamping mechanism plays the role of an installation boundary through the mounting base 1. The positioning member 3 and the protection component 5 on the mounting base 1 enclose to form a limiting cavity, and the tenon 102 of the blade 100 is limited through the limiting cavity. A rotatable clamping member 2 is arranged in the limiting groove 13 on the mounting base 1, and a compression spring assembly 7 is also arranged in the limiting groove 13. The compression spring assembly 7 is connected to the second end of the clamping member 2, and the second end of the clamping member 2 can be pushed by the compression spring assembly 7 to rotate around the hinge member in the middle of the clamping member 2, so as to push the first clamping block 23 to clamp the tenon 102 in the limiting cavity, realizing the clamping and fixing of the blade 100. When it is necessary to loosen and disassemble the blade 100, manually press the pressing part 24 of the clamping member 2, and the clamping member 2 can be pushed to rotate so that the first clamping block 23 disengages from the tenon 102. Of course, when initially clamping the tenon 102 of the blade 100, the pressing part 24 of the clamping member 2 can be pressed to make the first clamping block 23 retract, facilitating the tenon 102 to be inserted into the limiting cavity, and then releasing the pressing part 24 can push the clamping member 2 to rotate under the elastic pushing action of the spring assembly 7, so that the first clamping block 23 can stably press against the tenon 102, realizing the very convenient and fast disassembly and assembly of the whole blade 100.

[0046] Preferably, please refer to Figure 5 and 6 As shown, the clamping member 2 further includes a body 21 and a connecting block 22. The connecting block 22 is connected to the middle of the body 21. The first clamping block 23 is connected to the first end of the body 21, and the pressing part 24 is connected to the second end of the body 21. A connecting hole is formed in the connecting block 22, and the connecting block 22 is connected to the hinge member through the connecting hole.

[0047] It can be understood that the whole clamping member 2 can rotate around the hinge member on the middle connecting block 22, so that the pressing part 24 and the first clamping block 23 rotate around the hinge member, realizing the quick pressing and limiting or loosening of the tenon 102 by the first clamping block 23.

[0048] Optionally, the hinge member includes a limit post 8. The limit post 8 acts as a dowel pin, which facilitates the rotatable installation of the clamping member 2 in the limiting groove 13 and also facilitates the disassembly, assembly and maintenance of the clamping member 2.

[0049] Preferably, please refer to Figure 5As shown, the compression spring assembly 7 includes a compression spring 71 and a connecting column 72. The connecting column 72 is connected to a screw hole preset on the inner wall of the limiting groove 13. A connecting groove 25 is formed on the side wall of the second end of the clamping member 2. The first end of the compression spring 71 is sleeved on the connecting column 72 and abuts against the inner wall of the limiting groove 13, and the second end of the compression spring 71 is in snap-fit connection with the connecting groove 25.

[0050] It can be understood that the compression spring 71 is installed and limited through the connecting column 72, and the second end of the compression spring 71 is simultaneously limited through the connecting groove 25, which is convenient for the stable connection between the compression spring 71 and the clamping member 2, ensuring that the compression spring 71 can continuously apply an elastic force to the second end of the clamping member 2 to push the clamping member 2 to stably clamp and limit the blade 100.

[0051] Optionally, the connecting column 72 is a stud. Using standard parts can reduce manufacturing costs and facilitate subsequent maintenance.

[0052] Preferably, please refer to Figure 1 and 6 As shown, the protection assembly 5 includes a first protection member 51 and a second protection member 52. The first protection member 51 and the second protection member 52 are arranged on opposite sides of the two positioning members 3. The first protection member 51 and the second protection member 52 and the two positioning members 3 enclose a limiting cavity, and the first protection member 51 and the second protection member 52 are also used to support and limit the boss at the tenon head 102.

[0053] It can be understood that by enclosing a limiting cavity with the two positioning members 3 by the first protection member 51 and the second protection member 52, and at the same time, the first protection member 51 and the second protection member 52 can also play a role in supporting and limiting the boss at the tenon head 102, which is beneficial to improving the stability of the support, clamping and limiting of the blade 100.

[0054] In this preferred embodiment, a positioning and supporting portion 31 with an inclined surface structure is provided on the opposite side of each of the two positioning members 3. The positioning and supporting portion 31 is used to support and limit the tenon teeth of the tenon head 102 to cooperate with the clamping member 2 to firmly clamp and limit the tenon head 102.

[0055] Optionally, the two positioning members 3 are respectively connected to the top of the mounting base 1 through first locking members 32. The first protection member 51 and the second protection member 52 are respectively connected to the side walls of the two positioning members 3 through third locking members 53. The first locking members 32 and the third locking members 53 are bolts or screws, which facilitate the disassembly, assembly and repair of the positioning members 3 and the protection assembly 5.

[0056] Preferably, please refer to Figure 5 、 6As shown, the protection component 5 further includes a second clamping block 54. At least one of the first protection member 51 and the second protection member 52 is provided with a limiting through hole. The second clamping block 54 is disposed through the limiting through hole, and the second clamping block 54 is disposed opposite to the first clamping block 23. The second clamping block 54 is used to cooperate with the first clamping block 23 to clamp and limit the tenon 102.

[0057] It can be understood that by arranging the second clamping block 54 in the limiting through hole of the first protection member 51 or the second protection member 52, and using the second clamping block 54 to cooperate with the first clamping block 23 to clamp and limit the tenon 102, a more stable clamping effect on the tenon 102 can be achieved.

[0058] Optionally, the second clamping block 54 includes a protruding portion and a limiting plate. The protruding portion is disposed at the first end of the limiting plate. The protruding portion is used to cooperate with the first clamping block 23 to clamp and limit the tenon 102. The sides of the protruding portion opposite to the first clamping block 23 are both bevel structures to support and engage with the tenon teeth at the tenon 102. The limiting plate is used to be inserted into the limiting through hole, and the second clamping block 54 is limited by abutting against the side wall of the first protection member 51 or the second protection member 52 through the protruding portion.

[0059] Preferably, please refer to Figure 1 and 7 As shown, the clamping mechanism further includes a shielding member 6. The shielding member 6 is disposed on the mounting base 1. The shielding member 6 is used to shield the opening of the limiting groove 13 and protect the clamping member 2 in the limiting groove 13.

[0060] It can be understood that due to the need to consider the service life of the clamping mechanism and the convenience of maintaining the clamping mechanism, such as the wear of the clamping mechanism caused by repeated sandblasting, and the fine sandblasting grains entering the gaps of the clamping mechanism during the sandblasting process, affecting the normal use of the clamping mechanism, etc. Therefore, the shielding member 6 shields the opening of the limiting groove 13, and at the same time plays a role in protecting the movably arranged clamping member 2 in the limiting groove 13, which is beneficial to reducing the sand grains from entering the gaps of the components of the clamping mechanism.

[0061] In this preferred embodiment, the shielding member 6 includes a first shielding plate 61 and a second shielding plate 62 that are perpendicularly connected to each other. The first shielding plate 61 is used to shield the first opening of the limiting groove 13 facing the top of the mounting base 1, and the second shielding plate 62 is used to shield the second opening of the limiting groove 13 facing the side of the mounting base 1.

[0062] It can be understood that the limiting groove 13 is formed on one side of the mounting base 1 and has two openings facing the top and one side of the mounting base 1, so that the first clamping block 23 of the clamping member 2 extends into the limiting cavity from the limiting groove 13. Of course, the present application does not exclude the solution of providing a through hole on the first protective member 51 or the second protective member 52 for the clamping member 2 to pass through; and the shielding member 6 can shield the two mutually perpendicular openings on both sides of the limiting groove 13 through the first shielding plate 61 and the second shielding plate 62, so as to reduce the phenomenon of sand grains entering the limiting groove 13.

[0063] Optionally, the shielding member 6 is connected to the mounting base 1 through a fourth locking member 63. The fourth locking member 63 is a bolt or a screw rod, which facilitates the disassembly and assembly of the shielding member 6.

[0064] Preferably, please refer to Figure 1 and 5 As shown, the clamping mechanism further includes a limiting stopper 4. A limiting hole 12 is formed in the side wall of the mounting base 1. The limiting hole 12 communicates with the limiting groove 13. The pressing portion 24 extends out of the limiting groove 13 through the limiting hole 12. The limiting stopper 4 is arranged at the limiting hole 12 and the limiting stopper 4 is located above the pressing portion 24. The limiting stopper 4 is used to limit the second end of the clamping member 2 and cooperate with the spring assembly 7 to clamp the relative two sides of the second end of the clamping member 2.

[0065] It can be understood that through the limiting hole 12, it is convenient for the operator to manually press the pressing portion 24 of the clamping member 2. By arranging the limiting stopper 4 at the limiting hole 12, the first side of the second end of the clamping member 2 facing the outside of the mounting base 1 can be limited by the limiting stopper 4. The connecting groove 25 is formed on the second side of the second end of the clamping member 2. The compression spring 71 is clamped with the connecting groove 25, so as to realize the limiting function of the limiting stopper 4 cooperating with the spring assembly 7 to clamp the second end of the clamping member 2 in the middle. By using limiting stoppers 4 with different thicknesses, the range of rotation of the clamping member 2 around the hinge member can be controlled to ensure stable clamping and limiting of the blade 100.

[0066] Optionally, the limiting stopper 4 includes a limiting baffle plate in a plate-like structure. The limiting baffle plate is connected to the side wall of the mounting base 1 through a second locking member 41. The second locking member 41 is a bolt or a screw rod, which facilitates the disassembly and assembly of the limiting stopper 4.

[0067] According to another aspect of the present application, there is also provided a method for sandblasting an aeroengine blade, which uses the above-mentioned aeroengine blade sandblasting device. The method for sandblasting an aeroengine blade includes the following steps:

[0068] S100. Press the pressing part 24 of the pressing and clamping part 2 to drive the first clamping block 23 to move in the opposite direction of the clamping direction, insert the tenon 102 of the blade 100 downward into the limiting cavity, and then release the pressing part 24. The first clamping block 23 is pushed by the compression spring assembly 7 to clamp the limiting tenon 102 to clamp the blade 100;

[0069] S200. Start the turntable mechanism 200 to drive the clamping mechanism to rotate, so as to drive the blade 100 to rotate through the clamping mechanism;

[0070] S300. Blow corundum sand on the blade 100 in a cycle by the spray gun. The number of cycles is 15 to 20 times, and the sand blowing pressure of the spray gun is 0.4 MPa.

[0071] The sand blowing method for the aero-engine blade of the present application also has the above beneficial effects. It also includes protecting the non-sand-blowing surface of the blade 100 from being sand-blown through the clamping mechanism and the trajectory actions of sequential sand blowing during the sand blowing operation, reducing the protection and disassembly of the workpiece during manual sand blowing. At the same time, the manipulator is used to complete the actions without manual operation, greatly reducing the labor intensity of personnel; the process parameters during this sand blowing process can be preset, not affected by human factors, and the uniformity and consistency of sand blowing can be guaranteed, and the sand blowing quality is stable and controllable; the sand blowing method of the present application can not only be applied to the sand blowing operation of the aero-engine turbine working blade, but also be applicable to other aero-engine similar blade structure parts, with wide adaptability.

[0072] Preferably, in step S200, the rotation speed of the turntable mechanism 200 does not exceed 6 s / revolution; in step S300, the spray gun sequentially blows corundum sand on the air flow channels at the tenon 102, the air flow channels of the blade crown 103, and the blade body 101.

[0073] It should be noted that the blade 100 is composed of a blade body 101, a tenon 102, and a blade crown 103. The sand blowing parts are the air flow channels of the blade body 101, the tenon 102, and the blade crown 103. The periphery of the tenon 102 is a sand blowing transition area, and the blade crown 103 allows sand blowing. Therefore, when designing the fixture, according to the part structure, the blade crown 103 of the blade 100 should be upward and the tenon 102 should be downward, and the tenon teeth of the tenon 102 are used to cooperate with the clamping part 2 and the positioning part 3 for clamping. At the same time, the convex platform at the tenon 102 is supported and limited by the protection component 5. By first blowing sand on the air flow channels at the tenon 102 and the air flow channels of the blade crown 103, specific sand blowing trajectory actions are realized, and combined with the clamping and shielding protection of the tenon teeth of the tenon 102 by the clamping mechanism, the effect of protecting the non-sand-blowing surface from being sand-blown can be achieved.

[0074] In some embodiments, the distance of the spray gun is set as follows: the distance between the center of the blade 100 and the nozzle of the spray gun is 120 mm to 150 mm, so that the spray gun can perform sandblasting operations more evenly, which is beneficial to improving the sandblasting coverage at various places, improving the sandblasting efficiency, and at the same time avoiding the phenomenon of overly concentrated sandblasting. The angle of the spray gun is adjusted adaptively: when sandblasting the upper and lower edge plates of the blade 100, the angle range between the spray gun and the horizontal line is 30° to 45°; when sandblasting the blade body 101 of the blade 100, the angle range between the spray gun and the horizontal line is 70° to 90°. This can effectively increase the sandblasting coverage range, ensure the uniformity of sandblasting, and avoid overly concentrated sandblasting, which may affect the quality and efficiency of sandblasting. The spray gun only needs to exceed the dimensions of the tenon 102 and the blade body 101 that need to be sandblasted. The overall horizontal movement distance of the spray gun does not exceed 50 mm, and the vertical movement distance does not exceed 80 mm. Reducing the horizontal and vertical movement distances of the spray gun is beneficial to reducing the time consumption of sandblasting and at the same time ensuring the sandblasting stability of the spray gun. By setting the sandblasting pressure of the spray gun to 0.4 MPa and the number of cyclic sandblasting times to 15 to 20 times, it is possible to avoid the impact on the surface of the blade 100 caused by excessive sandblasting pressure, and a sufficient number of cyclic sandblasting times can effectively ensure the effect of sandblasting treatment.

[0075] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device.

[0076] Specific examples are used in this article to elaborate on the principles and implementation manners of the present application. The descriptions of the above examples are only used to help understand the method and its core idea of the present application. The above are only the preferred implementation manners of the present application. It should be noted that due to the limitations of literal expression and objectively infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principles of the present application, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the inventive concept and technical solution to other occasions without improvement, should all be regarded as the protection scope of the present application.

Claims

1. An airfoil sandblasting device for an aeroengine, comprising a spray gun for sandblasting the surface of an airfoil (100), a clamping mechanism for clamping the airfoil (100), the clamping mechanism being used for connecting with a turntable mechanism (200), the turntable mechanism (200) being used for driving the clamping mechanism and the airfoil (100) to rotate, the airfoil (100) comprising an airfoil body (101), a tenon (102) and a shroud (103), characterized in that, The clamping mechanism includes a mounting base (1), a clamping member (2), a positioning member (3), a protection component (5), and a compression spring component (7): The bottom of the mounting base (1) is provided with a mounting slot (11) for connecting with the turntable mechanism (200). Two positioning members (3) are arranged at intervals on the top of the mounting base (1). The protection component (5) is used to limit and protect the opposite sides of the two positioning members (3), and the protection component (5) and the two positioning members (3) enclose a limiting cavity for limiting the tenon (102) of the blade (100). A limiting slot (13) is provided on the mounting base (1). The middle part of the clamping member (2) is connected to the inner wall of the limiting slot (13) through a hinge member so that the clamping member (2) is rotatably arranged in the limiting slot (13). A first clamping block (23) is provided at the first end of the clamping member (2), and the first clamping block (23) is located in the limiting cavity. A pressing part (24) is provided at the second end of the clamping member (2), and the pressing part (24) extends outside the limiting slot (13). The compression spring component (7) is arranged in the limiting slot (13), and the compression spring component (7) is connected to the second end of the clamping member (2). The compression spring component (7) is used to push the second end of the clamping member (2) to rotate around the hinge member in the middle of the clamping member (2) to push the first clamping block (23) to clamp the tenon (102) in the limiting cavity. The clamping member (2) is used to be pressed through the pressing part (24) to push the first clamping block (23) away from the tenon (102).

2. The sandblasting device for an aeroengine blade according to claim 1, wherein The clamping member (2) further includes a main body (21) and a connecting block (22). The connecting block (22) is connected to the middle of the main body (21). The first clamping block (23) is connected to the first end of the main body (21). The pressing part (24) is connected to the second end of the main body (21). A connecting hole is provided on the connecting block (22), and the connecting block (22) is connected to the hinge member through the connecting hole.

3. The sandblasting device for an aeroengine blade according to claim 1, wherein The compression spring component (7) includes a compression spring (71) and a connecting column (72). The connecting column (72) is connected to a preset screw hole on the inner wall of the limiting slot (13). A connecting groove (25) is provided on the side wall of the second end of the clamping member (2). The first end of the compression spring (71) is sleeved on the connecting column (72) and abuts against the inner wall of the limiting slot (13). The second end of the compression spring (71) is in snap-fit connection with the connecting groove (25).

4. An airfoil sandblasting device for an aeroengine according to claim 1, characterized in that, The protection component (5) includes a first protection member (51) and a second protection member (52). The first protection member (51) and the second protection member (52) are arranged on the opposite sides of the two positioning members (3). The first protection member (51) and the second protection member (52) and the two positioning members (3) enclose a limiting cavity. The first protection member (51) and the second protection member (52) are also used to support and limit the boss at the tenon (102).

5. The sandblasting device for an aeroengine blade according to claim 4, characterized in that, The protective component (5) further includes a second clamping block (54). At least one of the first protective member (51) and the second protective member (52) is provided with a limiting through-hole. The second clamping block (54) is arranged through the limiting through-hole, and the second clamping block (54) is arranged opposite to the first clamping block (23). The second clamping block (54) is used to cooperate with the first clamping block (23) to clamp and limit the tenon (102).

6. The sandblasting device for an aero-engine blade according to claim 1, wherein, The clamping mechanism further includes a shielding member (6). The shielding member (6) is arranged on the mounting base (1). The shielding member (6) is used to shield the opening of the limiting groove (13) and protect the clamping member (2) in the limiting groove (13).

7. The sandblasting device for an aeroengine blade according to claim 6, characterized in that, The shielding member (6) includes a first shielding plate (61) and a second shielding plate (62) which are perpendicularly connected to each other. The first shielding plate (61) is used to shield the first opening of the limiting groove (13) facing the top of the mounting base (1), and the second shielding plate (62) is used to shield the second opening of the limiting groove (13) facing the side of the mounting base (1).

8. The sandblasting device for an aero-engine blade according to claim 1, characterized in that, The clamping mechanism further includes a limiting stopper (4). A limiting hole (12) is formed in the side wall of the mounting base (1). The limiting hole (12) communicates with the limiting groove (13). The pressing portion (24) extends out of the limiting groove (13) through the limiting hole (12). The limiting stopper (4) is arranged at the limiting hole (12) and the limiting stopper (4) is located above the pressing portion (24). The limiting stopper (4) is used to limit the second end of the clamping member (2) and cooperate with the spring assembly (7) to clamp the relative two sides of the second end of the clamping member (2).

9. A method for sandblasting an aero-engine blade, characterized in that, Adopting the airfoil sandblasting device for an aeroengine as described in any one of claims 1-8, the aeroengine airfoil sandblasting method includes the following steps: S100. Press the pressing portion (24) of the clamping member (2) to drive the first clamping block (23) to move in the opposite direction of the clamping direction, and insert the tenon (102) of the airfoil (100) downward into the limiting cavity. Then release the pressing portion (24), and push the first clamping block (23) through the compressed spring assembly (7) to clamp and limit the tenon (102) to clamp the airfoil (100); S200. Start the turntable mechanism (200) to drive the clamping mechanism to rotate, so as to drive the airfoil (100) to rotate through the clamping mechanism; S300. Blow corundum sand on the airfoil (100) through the spray gun in a cycle, and the number of cycles is 15 to 20 times, and the sandblasting pressure of the spray gun is 0.4 MPa.

10. A method for sandblasting an aeroengine blade according to claim 9, characterized in that, In step S200, the rotation speed of the turntable mechanism (200) does not exceed 6 s / circle; in step S300, the spray gun sequentially blows corundum sand on the air flow channel at the tenon (102), the air flow channel of the shroud (103), and the airfoil body (101).

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