A multi-array closed cavity blade surface finishing device and method

Abstract

The application discloses a kind of multi-array closed cavity blade surface finishing device and processing method, the device includes second main vibration body, one side is elastically connected with first main vibration body by elastic component, first main vibration body is provided with blade polishing container, several blades are provided in blade polishing container, the other side of second main vibration body is provided with excitation motor, and eccentric block is provided on motor shaft thereof;The processing method includes selecting roll polishing block according to the configuration of blade itself and blade polishing container, blade is loaded into blade polishing container, and excitation motor is started to excite blade polishing container;By ensuring that at least 5 roll polishing blocks are present between adjacent blades and rotating the blade multiple times, the blade can be polished in all directions, improving the surface quality and surface compressive stress of the blade, extending the fatigue life of the blade, avoiding the subjective and empirical nature of manual polishing, improving the polishing efficiency and quality, and achieving batch consistency.

Description

Technical Field

[0001] This disclosure relates to the field of precision machining technology for aerospace forged blades, specifically to a blade surface finishing device and method with a multi-array closed cavity. Background Technology

[0002] Blade-like components are key parts of aero engines, and their surface quality has a significant impact on the aero-engine's aerodynamic efficiency, service life, and reliability.

[0003] Currently, the surface polishing of blade parts is mainly achieved by rough grinding using a vibratory finishing method followed by manual shaping by workers. Vibratory finishing involves placing the blade freely in discrete abrasive and using the eccentric vibration of the container to drive the abrasive in a spiral motion, thereby achieving rough grinding of the blade surface. However, for large, long-chord blades, problems such as bumps and incomplete polishing of tenon edges and other areas are prone to occur. Manual polishing is inefficient, has a poor working environment, relies on worker experience, and makes it difficult to ensure batch consistency of polishing results. Therefore, there is an urgent need for a batch consistent polishing method for rough and fine polishing of aero-engine blade surfaces. To this end, we propose a blade surface finishing device and processing method with a multi-array closed cavity. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a blade surface finishing apparatus and processing method with multiple array closed cavities.

[0005] In a first aspect, this application provides a blade surface finishing apparatus with a multi-array closed cavity, comprising:

[0006] Second principal vibrating body;

[0007] The first main vibrating body is elastically connected to one side of the second main vibrating body via an elastic component;

[0008] A blade polishing container is mounted on the first main vibrating body. Inside the container, there is a rolling polishing block with a nominal size of d and polishing fluid. Inside the blade polishing container, there are n blades arranged in an array by a blade clamping device. The two ends of the blade clamping device are movably connected to the two opposite inner walls of the blade polishing container in the first direction, respectively, to drive the blades to rotate. The diameter of the circle formed by the blade at its widest point rotating around its own axis is set as the rotation diameter D.

[0009] The blade polishing container has a third inner wall and a fourth inner wall opposite each other in a third direction, and the distance from the first blade to the third inner wall is set as L. P The distance from the nth blade to the fourth inner wall is L. q The distance between adjacent blades is L i L i={L1, L2, L3, ... L n}, making L P ≥D+5d, L q ≥D+5d, L i ≥D+5d;

[0010] Let H1 be the distance from the blade axis to the bottom inner wall of the blade polishing container, and H2 be the distance from the blade axis to the top inner wall of the blade polishing container, such that H1≥D / 2+5d and H2≥D / 2+5d;

[0011] The blade polishing container has a length of L, extending along a third direction, and a height of H, extending along a second direction, with L = L0. P +L1+L2+...+L n +L q H = H1 + H2, the second direction is perpendicular to the third direction and perpendicular to the first direction, and the third direction is perpendicular to the first direction;

[0012] The excitation assembly is disposed on the side of the second main vibrating body away from the first main vibrating body. The excitation assembly includes two excitation motors arranged along the second direction. Each of the two excitation motors has an eccentric block on its motor shaft. The two eccentric blocks rotate in opposite directions simultaneously under the drive of the excitation motors to provide an excitation force to the second main vibrating body along the first direction. The elastic component drives the blade polishing container to vibrate along the first direction to polish the blade.

[0013] According to the technical solution provided in the embodiments of this application, the second main vibrating body includes a second base plate, and a second connecting plate is fixedly disposed on the top of the second base plate, and the second connecting plate is perpendicular to the second base plate;

[0014] The second base plate is provided with a base at its bottom, and vibration damping rubber is provided between the second base plate and the base;

[0015] The second connecting plate has a first sidewall and a second sidewall disposed opposite to each other in the first direction. The elastic component is disposed on the first sidewall and includes a plurality of main vibration springs, which are evenly disposed on the first sidewall.

[0016] According to the technical solution provided in the embodiments of this application, the first main vibrating body includes a first base plate, the first base plate is parallel to the second base plate, and a first connecting plate is fixedly connected to the side wall of the first base plate near the second main vibrating body. The first connecting plate is parallel to the second connecting plate, and the end of the main vibrating spring away from the second main vibrating body is connected to the first connecting plate.

[0017] The blade polishing container is disposed on the top of the first base plate, and the blade polishing container has a first inner wall and a second inner wall opposite to each other in the first direction. The first inner wall is relatively close to the first connecting plate, and a plurality of second mounting holes are uniformly opened on the first inner wall.

[0018] According to the technical solution provided in the embodiments of this application, the blade includes a blade body with a first end and a second end at its two ends, the first end being provided with a tenon, and grooves being provided on the two opposite sidewalls of the tenon.

[0019] The blade clamping device includes a blade attitude adjustment plate. The blade attitude adjustment plate is evenly provided with a plurality of first mounting holes in the circumferential direction. The blade attitude adjustment plate is installed on the first inner wall by connecting the first mounting holes and the second mounting holes through a mounting component. The blade attitude adjustment plate is provided with a mounting block on the side wall away from the first inner wall. The blade clamping device also includes an upper pad plate and a lower pad plate respectively provided at the top and bottom of the tenon. The upper pad plate and the lower pad plate are provided with a locking block corresponding to the groove on the side wall close to each other. The mounting block is provided with a mounting groove adapted to the lower pad plate.

[0020] The top of the mounting block is provided with a third mounting hole on both sides of the mounting groove. The blade clamping device also includes a pressure plate, which is disposed on the top of the upper pad. The pressure plate is provided with a fourth mounting hole corresponding to the two third mounting holes. The set screw passes through the fourth mounting hole and extends into the third mounting hole.

[0021] According to the technical solution provided in the embodiments of this application, a connecting block is provided at the second end of the blade body;

[0022] The blade clamping device further includes a tooling support plate and a blade gripper. The tooling support plate is fixedly mounted on the second inner wall. The blade gripper has a third side wall and a fourth side wall that are arranged opposite to each other. The third side wall is provided with a movable groove corresponding to the tooling support plate, and the movable groove and the tooling support plate are movably sleeved so that the blade gripper and the tooling support plate can rotate relative to each other around the blade gripper along the axis of the first direction. The fourth side wall is provided with a receiving groove corresponding to the connecting block so that the connecting block is engaged with the blade gripper.

[0023] Secondly, this application provides a method for surface finishing of blades with multi-array closed cavities, which utilizes a surface finishing apparatus for blades with multi-array closed cavities, comprising:

[0024] S01. Select a polishing block with a nominal size of d based on the blade's own configuration.

[0025] S02. Select n blades and determine the rotation diameter D of the blade body. The rotation diameter D is the diameter of the circle formed by rotating the blade body around its own axis at the point where the blade body has the maximum width.

[0026] S03. Select a blade polishing container with length L and height H;

[0027] S04. Determine the distance from the first blade to the third inner wall as L. P , making L P ≥D+5d, the distance from the nth blade to the fourth inner wall is L q , making L q ≥D+5d; wherein, the third inner wall and the fourth inner wall are two side walls of the blade polishing container that are opposite each other in a third direction;

[0028] S05. Determine the spacing between adjacent blades as L. i L i ={L1, L2, L3, ... L n}, making L i ≥D+5d, and L=L p +L1+L2+L3+...+L n +L q ;

[0029] S06. Determine the distance from the blade axis to the bottom inner wall of the blade polishing container as H1, and the distance from the blade axis to the top inner wall of the blade polishing container as H2, where H1≥D / 2+5d, H2≥D / 2+5d, and H=H1+H2;

[0030] S07, move n blades at a set distance L i The blades are inserted into the blade polishing container through a blade clamping device, and then filled with polishing blocks and polishing fluid.

[0031] S08. Start the excitation motor to make the blade polishing container reciprocate along the first direction, and the rolling polishing block polishes the blade.

[0032] S09. After polishing for a preset time T minutes, stop the excitation motor, take out the blade, rotate the blade by a preset angle β, put it back into the blade polishing container, polish the blade again for a preset time T minutes, and then take it out.

[0033] S10. Repeat S07-S09 until the blade is polished r times to complete the overall polishing. Remove the blade, clean it, and dry it for storage.

[0034] According to the technical solution provided in the embodiments of this application, when L p and L q When L is greater than D+10d, n blades are arranged in an array inside the blade polishing container; when L p and L qWhen the value is less than D+10d, the first blade and the nth blade are set as contoured workpieces.

[0035] According to the technical solution provided in the embodiments of this application, a first preset angle α is formed between the blade axis and the first plane, and a second preset angle λ is formed between the blade axis and the second plane. The first plane is a vertical plane parallel to the third inner wall of the blade polishing container, and the second plane is a horizontal plane parallel to the bottom side wall of the blade polishing container. Wherein, -45°≤α≤45°, -45°≤λ≤45°.

[0036] According to the technical solution provided in the embodiments of this application, the preset angle β satisfies 15°≤β≤90°.

[0037] According to the technical solution provided in the embodiments of this application, 1≤r≤8, T≥10 minutes, the excitation frequency of the blade polishing container is 30-45Hz, and the amplitude is 1.5-3mm.

[0038] In summary, this technical solution specifically discloses a blade surface finishing device and method with a multi-array closed cavity. The device includes a second main vibrating body, one side of which is elastically connected to a first main vibrating body through an elastic component. A blade polishing container is provided on the first main vibrating body, and several blades are provided inside the blade polishing container. An excitation motor is provided on the other side of the second main vibrating body, and an eccentric block is provided on the motor shaft of the excitation motor.

[0039] The processing method includes selecting a tumbling polishing block with a nominal size d based on the blade's own configuration, determining the diameter D of the circle formed by rotating the blade body at its widest point around its own axis, and setting the blade spacing L. i , making L i ≥D+5d, determine the distance L from the first blade to the third inner wall of the blade polishing container. P , making L P ≥D+5d, the distance from the nth blade to the fourth inner wall of the blade polishing container is L. q , making L q Given ≥D+5d, determine the distance from the blade axis to the bottom inner wall of the blade polishing container as H1, and the distance from the blade axis to the top inner wall of the blade polishing container as H2; select a blade polishing container with length L and height H, and let L = L P +L1+L2+...+L n +L q H = H1 + H2. Several blades are set in the blade polishing container to ensure that there are at least 5 polishing blocks for adjacent blades. Then, the excitation motor is started to excite the blade polishing container. After excitation for T minutes, the blade is taken out and rotated. The blade is put back into the blade polishing container to continue polishing. This process is repeated many times until the blade is completely polished.

[0040] This processing device utilizes this processing method to ensure that there are at least 5 tumbling grinding blocks between adjacent blades and to achieve all-round polishing of the blade by rotating the blade multiple times. This improves the surface quality and surface compressive stress of the blade, extends the fatigue life of the blade, avoids the subjective experience of manual polishing, and can improve polishing efficiency and polishing quality, achieving batch consistency. Attached Figure Description

[0041] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0042] Figure 1 This is a front view of a blade surface finishing device with multiple arrays of closed cavities.

[0043] Figure 2 A schematic diagram showing the arrangement of several blades inside the blade polishing container.

[0044] Figure 3 A schematic diagram showing the first preset angle α formed between the blade axis and the first plane.

[0045] Figure 4 A schematic diagram showing the second preset angle λ formed between the blade axis and the second plane.

[0046] Figure 5 This is an exploded view of the blade clamping device.

[0047] The following are the labeling elements in the diagram: 1. Second main vibrating body; 2. First main vibrating body; 3. Blade polishing container; 4. Blade clamping device; 5. Blade; 6. Excitation motor; 7. Eccentric block; 8. Second base plate; 9. Second connecting plate; 10. Base; 11. Vibration isolation rubber; 12. Main vibration spring; 13. First base plate; 14. First connecting plate; 15. Blade body; 16. Tenon; 17. Groove; 18. Blade attitude adjustment plate; 19. First mounting hole; 20. Mounting block; 21. Upper pad; 22. Lower pad; 23. Clamping block; 24. Mounting groove; 25. Third mounting hole; 26. Pressure plate; 27. Set screw; 28. Connecting block; 29. ​​Tooling support plate; 30. Blade claw; 31. Movable groove; 32. Receiving groove. Detailed Implementation

[0048] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] Example 1

[0051] Please refer to Figure 1 A blade surface finishing apparatus with a multi-array closed cavity, comprising:

[0052] The second main vibrating body 1 includes a second base plate 8, and a second connecting plate 9 is fixedly connected to the top of the second base plate 8. Optionally, the second base plate 8 and the second connecting plate 9 are integrally formed and have an inverted T-shaped structure. The second connecting plate 9 and the second base plate 8 are perpendicular to each other, and the second base plate 8 is parallel to a first direction. The first direction is... Figure 1 Mid-horizontal direction;

[0053] The second connecting plate 9 has a first sidewall and a second sidewall that are arranged opposite to each other in a first direction. The first sidewall is connected to the first main vibrator 2 by an elastic component, and the second sidewall is provided with an excitation component for exciting the second connecting plate 9.

[0054] The base 10 is located at the bottom of the second base plate 8, and vibration isolation rubber 11 is provided between the base 10 and the second base plate 8 to buffer vibration.

[0055] The excitation assembly includes two excitation motors 6 arranged along a second direction. Each excitation motor 6 has a motor shaft, and each motor shaft is equipped with an eccentric block 7. The two motor shafts rotate simultaneously in opposite directions at a preset angular velocity ω, driving the two eccentric blocks 7 to rotate simultaneously in opposite directions at a preset angular velocity ω. The centrifugal force generated by the two rotating eccentric blocks 7 excites the second main vibrating body 1. Since the two excitation motors 6 are arranged along the second direction and rotate in opposite directions at the same speed, the excitation force in the second direction can be canceled out, leaving only the excitation force in the first direction. The excitation force in the first direction drives the second main vibrating body 1 to move, and the elastic component drives the first main vibrating body 2 to reciprocate in the first direction; the second direction is... Figure 1 The first direction is vertical, and the second direction is perpendicular to the first direction.

[0056] The first main vibrating body 2 includes a first base plate 13, which is parallel to the second base plate 8. A first connecting plate 14 is fixedly connected to the side wall of the first base plate 13 near the second main vibrating body 1, and the first connecting plate 14 is parallel to the second connecting plate 9.

[0057] The elastic component includes multiple main vibration springs 12, which are evenly arranged between the first main vibration body 2 and the second main vibration body 1. The length direction of the main vibration spring 12 is parallel to the first direction. The two ends of the main vibration spring 12 are respectively fixedly connected to the first side wall of the second connecting plate 9 and the side wall of the first connecting plate 14 near the second main vibration body 1.

[0058] The blade polishing container 3 is disposed on the first main vibrating body 2. Specifically, the blade polishing container 3 is fixedly connected to the top of the first base plate 13. It is pre-filled with a roller polishing block with a nominal size of d and polishing fluid for polishing the blade 5. The blade polishing container 3 has a first inner wall and a second inner wall that are opposite to each other in a first direction. The first inner wall is relatively close to the second main vibrating body 1, and a plurality of second mounting holes are evenly opened on the first inner wall.

[0059] The blade polishing container 3 extends along a third direction in its length direction and along a second direction in its height direction. The blade polishing container 3 has a length of L and a height of H. The blade polishing container 3 has a third inner wall and a fourth inner wall that are opposite each other in the third direction. Figure 3 The horizontal direction; the third direction is perpendicular to the first direction and perpendicular to the second direction;

[0060] It should be noted that the roller polishing blocks are resin particles or ceramic particles in the shape of cones, triangular prisms, oblique triangles, spheres, etc., and the polishing fluid is a liquid medium with cleaning and brightening effects.

[0061] The blade polishing container 3 holds n blades 5 by a number of blade clamping devices 4 arranged in an array. The blade polishing container 3 can be optionally set into the shape of cuboid, cube, frustum, etc., according to the configuration of the blade 5 and the distribution of the particle flow field. The size of the blade polishing container 3 is set according to the clamping posture and number of blades 5 to be polished.

[0062] The blade 5 includes a blade body 15, which has a rotation diameter D. The rotation diameter is the diameter of the circle formed by rotating the blade body 15 around its own axis at the point of maximum width. The blade body 15 has a first end and a second end at its two ends. The first end is relatively close to the second main vibrator 1, and a tenon 16 is provided at the first end. Grooves 17 are provided on both opposite sidewalls of the tenon 16. A connecting block 28 is provided at the second end.

[0063] The blade clamping device 4 includes a blade attitude adjustment plate 18. The blade attitude adjustment plate 18 is evenly provided with a plurality of first mounting holes 19 in the circumferential direction. The mounting component passes through the first mounting holes 19 and extends into the second mounting holes. The blade attitude adjustment plate 18 is installed on the first inner wall. The blade attitude adjustment plate 18 can change the spatial attitude of the clamped blade 5 by rotating and changing the installation position.

[0064] A mounting block 20 is provided on the side wall of the blade attitude adjustment plate 18 away from the first inner wall. The blade clamping device 4 also includes an upper pad 21 and a lower pad 22 respectively provided on the top and bottom of the tenon 16. The upper pad 21 and the lower pad 22 are provided with locking blocks 23 corresponding to the groove 17 on the side wall near the tenon 16. The mounting block 20 is provided with a mounting groove 24 that matches the lower pad 22. The upper pad 21 and the lower pad 22 are made of nylon material with low elastic modulus.

[0065] The top of the mounting block 20 is provided with third mounting holes 25 on both sides of the mounting groove 24. The blade clamping device 4 also includes a pressure plate 26, which is set on the top of the upper pad 21. The pressure plate 26 is provided with a fourth mounting hole corresponding to the two third mounting holes 25. The set screw 27 passes through the fourth mounting hole and extends into the third mounting hole 25. Thus, the locking blocks 23 of the upper pad 21 and the lower pad 22 are engaged in the groove 17 of the tenon 16, and the pressure plate 26 and the mounting block 20 clamp the tenon 16.

[0066] The blade clamping device 4 also includes a tooling support plate 29 and a blade claw 30. The tooling support plate 29 is fixedly mounted on the second inner wall. The blade claw 30 has a third side wall and a fourth side wall that are arranged opposite to each other. The third side wall is provided with a movable groove 31 corresponding to the tooling support plate 29, and the movable groove 31 and the tooling support plate 29 are movably sleeved together so that the blade claw 30 and the tooling support plate 29 can rotate relative to each other around the blade claw 30 along the axis of the first direction. The fourth side wall is provided with a receiving groove 32 corresponding to the connecting block 28 so that the connecting block 28 and the blade claw 30 can be engaged. When the connection between the blade attitude adjustment plate 18 and the first inner wall is released, and the blade attitude adjustment plate 18 is rotated, the connecting block 28 abuts against the inner wall of the receiving groove 32 and drives the blade claw 30 to rotate. The blade claw 30 and the tooling support plate 29 rotate relative to each other. The blade claw 30 is made of nylon.

[0067] n blades 5 are arranged along a third direction inside the blade polishing container 3, wherein the distance from the first blade 5 to the third inner wall is set as L. P The distance from the nth blade 5 to the fourth inner wall is L. q The spacing between adjacent blades 5 is a set distance L. i L i ={L1, L2, L3, ... L n The distance from the axis of blade 5 to the bottom inner wall of the blade polishing container 3 is H1, and the distance from the axis of blade 5 to the top inner wall of the blade polishing container 3 is H2, where L i ≥D+5d, L P ≥D+5d, L q ≥D+5d, H1≥D / 2+5d, H2≥D / 2+5d, the length L of the blade polishing container 3 satisfies L=L P +L1+L2+...+Ln +L q The blade polishing container 3, height H, satisfies H = H1 + H2.

[0068] Example 2

[0069] A method for surface finishing of blades with a multi-array closed cavity involves activating an excitation assembly, causing the motor shafts of two excitation motors 6 to rotate simultaneously at the same speed and in opposite directions, which in turn drives two eccentric blocks 7 to rotate simultaneously at the same speed and in opposite directions, generating an excitation force along the first direction on the second main vibrating body 1. The first main vibrating body 2 is then moved back and forth along the first direction by an elastic component, thereby enabling the blade polishing container 3 to move back and forth along the first direction. The polishing blocks and polishing fluid inside the blade polishing container 3 can polish the blade 5.

[0070] Select a polishing block with a nominal size of d based on the configuration of blade 5;

[0071] Select n blades 5, and determine the diameter of the circle formed by rotating the blade body 15 at its widest point around its own axis as the rotation diameter D;

[0072] Based on d and D, a blade polishing container 3 with length L and height H is selected. Specifically, n blades 5 are arranged along the length direction inside the blade polishing container 3, wherein the spacing between adjacent blades 5 is a set distance L. i L must be satisfied i ≥D+5d;

[0073] The distance from the first blade 5 to the third inner wall is determined to be L. P The distance from the nth blade 5 to the fourth inner wall is L. q , making L P ≥D+5d, L q ≥D+5d;

[0074] Therefore, the length L of the blade polishing container 3 satisfies L = L P +L1+L2+...+L n +L q ;

[0075] The distance from the axis of blade 5 to the bottom inner wall of blade polishing container 3 is determined to be H1, and the distance from the axis of blade 5 to the top inner wall of blade polishing container 3 is determined to be H2, such that H1≥D / 2+5d and H2≥D / 2+5d. Therefore, the height H of blade polishing container 3 satisfies H=H1+H2.

[0076] Therefore, at least 5 tumbling grinding blocks are guaranteed between adjacent blades 5, and the flow of the tumbling grinding blocks can be guaranteed during the polishing process, so that the particle flow field around each blade 5 is consistent, thereby achieving the effect of polishing consistency of n blades 5.

[0077] It should be noted that when LP and L q When the value is greater than D+10d, n blades 5 are arranged in an array within the blade polishing container 3; when L P and L q When it is less than D+10d, the first blade 5 and the nth blade 5 are set as a contour workpiece. The contour workpiece participates in the polishing process as part of the blade polishing container 3. The purpose is to ensure the medium flow between the first blade 5 and the second blade 5 and between the nth blade 5 and the (n-1)th blade 5, so as to ensure that the particle flow field around each blade 5 is consistent.

[0078] The blade 5 is placed into the blade polishing container 3 via the blade clamping device 4, so that a first preset angle α is formed between the axis of the blade 5 and the first plane, and a second preset angle λ is formed between the axis of the blade 5 and the second plane, wherein -45°≤α≤45° and -45°≤λ≤45°. The first preset angle α and the second preset angle λ can be adjusted simultaneously. The first plane is... Figure 3 The middle vertical plane, that is, the vertical plane parallel to the third inner wall of the blade polishing container 3, the second plane is Figure 4 The middle horizontal plane is the horizontal plane that is parallel to the bottom inner wall of the blade polishing container 3;

[0079] Two excitation motors 6 are started to make the blade polishing container 3 reciprocate along the first direction. The polishing block and polishing fluid can polish the blade 5. After the polishing is set for a preset time T minutes, the excitation motors 6 are stopped, the polishing block and polishing fluid are cleaned, the blade 5 is taken out, and then the blade 5 is rotated by a preset angle β and put back into the blade polishing container 3. At the same time, the axis of the blade 5 forms a first preset angle α with the first plane, and the axis of the blade 5 forms a second preset angle λ with the second plane. Then, multiple polishing steps are performed.

[0080] It should be noted that the blade attitude adjustment plate 18 is rotated by a preset angle β around its axis parallel to the first direction to drive the blade 5 to rotate.

[0081] Furthermore, the width of the blade polishing container 3 is set to W, which is determined by the length of the blade clamping device 4 that clamps the blade 5.

[0082] The polishing process includes:

[0083] The rolling polishing block and polishing fluid are loaded into the blade polishing container 3. The blade 5, after being rotated by a preset angle β, is placed into the blade polishing container 3, and the axis of the blade 5 forms a first preset angle α with the first plane, and the axis of the blade 5 forms a second preset angle λ with the second plane. The excitation motor 6 is started to make the blade polishing container 3 reciprocate along the first direction to polish the blade 5.

[0084] After the polishing time is set to T minutes, the excitation motor 6 is stopped, the polishing block and polishing fluid are cleaned, the blade 5 is taken out, and then the blade 5 is rotated by a preset angle β and put back into the blade polishing container 3.

[0085] Repeat the polishing steps until the blade 5 is completely polished. Stop the excitation motor 6, clean the polishing block and polishing fluid, remove the blade 5 and perform ultrasonic cleaning, and store it after drying.

[0086] Among them, the number of polishing times is set to r, 1≤r≤8, the preset time for each polishing is T≥10 minutes, and the preset angle β of the rotation of blade 5 after each polishing is completed must satisfy 15°≤β≤90°.

[0087] Furthermore, before each polishing, the blade polishing container 3 needs to be filled with polishing blocks and polishing fluid, which occupy 50%-80% of the internal volume of the blade polishing container 3. When polishing begins, the vibration frequency of the blade polishing container 3 is 30-45Hz and the amplitude is 1.5-3mm by controlling the excitation motor 6.

[0088] Working principle: The blade 5 is loaded into the blade polishing container 3 through the blade clamping device 4, ensuring that the axis of the blade 5 forms a first preset angle α with the first plane and a second preset angle λ with the second plane. Then, 50%-80% of the volume of the blade polishing container 3 is filled with tumbling polishing blocks and polishing fluid. The blade polishing container 3 is then sealed. The excitation assembly is then started, and two excitation motors 6 drive two eccentric blocks 7 to rotate simultaneously and in opposite directions at the same speed. The excitation frequency of the excitation motors 6 is 30-45Hz, and the amplitude is 1.5-3mm. The blade 5 is polished for the first time. After the preset polishing time T minutes, the excitation motors 6 are stopped, the blade polishing container 3 is opened, and the tumbling polishing blocks and polishing fluid are cleaned. Take out the blade 5 and rotate it by a preset angle β. Then, put the blade 5 back into the blade polishing container 3 through the blade clamping device 4, ensuring that the axis of the blade 5 forms a first preset angle α with the first plane and a second preset angle λ with the second plane. Then, fill the blade polishing container 3 with 50%-80% of the volume of the blade polishing container 3 with a rolling polishing block and polishing liquid. Seal the blade polishing container 3, start the excitation motor 6, and polish the blade 5 for the second time. Stop after polishing for a preset time T minutes. Repeat this process until the blade 5 rotates at least one revolution to complete the overall polishing. After polishing, open the blade polishing container 3, take out the blade 5 and perform ultrasonic cleaning. After drying, store it.

[0089] The reciprocating excitation force generated by the excitation motor 6 along the first direction drives the blade polishing container 3 to move back and forth along the first direction. The rolling polishing block produces collision, rolling and scratching effects on the surface of the blade 5. The rotation angle of the blade 5 is continuously adjusted by rotating the blade attitude adjustment plate 18, so as to achieve all-round polishing of the blade 5. It replaces the traditional manual polishing, improves polishing efficiency, avoids the subjective experience of human hands, achieves batch polishing consistency of the blade 5, improves the surface quality and surface compressive stress of the blade 5, and extends the fatigue life of the blade 5.

[0090] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A blade surface finishing apparatus with multiple arrays of closed cavities, characterized in that, include: Second principal vibrator (1); The first main vibrating body (2) is elastically connected to one side of the second main vibrating body (1) through an elastic component; The blade polishing container (3) is set on the first main vibrating body (2). Inside it are a rolling polishing block with a nominal size of d and a polishing liquid. Inside the blade polishing container (3), n blades (5) are arranged in an array through a blade clamping device (4). The two ends of the blade clamping device (4) are movably connected to the two opposite inner walls of the blade polishing container (3) in the first direction, respectively, to drive the blades (5) to rotate. The diameter of the circle formed by the blade (5) rotating around its own axis at the maximum width is set as the rotation diameter D. The blade polishing container (3) has a third inner wall and a fourth inner wall opposite each other in the third direction. The distance from the first blade (5) to the third inner wall is set as LP, the distance from the nth blade (5) to the fourth inner wall is set as Lq, and the distance between adjacent blades (5) is set as a distance Li, Li = {L1, L2, L3, ..., Ln}, such that LP ≥ D + 5d, Lq ≥ D + 5d, and Li ≥ D + 5d; Set the distance from the axis of the blade (5) to the bottom inner wall of the blade polishing container (3) as H1, and the distance from the axis of the blade (5) to the top inner wall of the blade polishing container (3) as H2, so that H1≥D / 2+5d and H2≥D / 2+5d; The blade polishing container (3) has a length of L, which extends along the third direction. The blade polishing container (3) has a height of H, which extends along the second direction. L = LP + L1 + L2 + ... + Ln + Lq, H = H1 + H2. The second direction is perpendicular to the third direction and perpendicular to the first direction. The third direction is perpendicular to the first direction. The excitation assembly is located on the side of the second main vibrating body (1) away from the first main vibrating body (2). The excitation assembly includes two excitation motors (6) arranged along the second direction. Each of the two excitation motors (6) has an eccentric block (7) on its motor shaft. The two eccentric blocks (7) rotate in opposite directions simultaneously under the drive of the excitation motors (6) to provide the second main vibrating body (1) with an excitation force along the first direction. The elastic assembly drives the blade polishing container (3) to vibrate along the first direction to polish the blade (5). The blade (5) includes a blade body (15), which has a rotation diameter D. The rotation diameter is the diameter of the circle formed by rotating the blade body (15) around its own axis at the point of maximum width. The blade body (15) has a first end and a second end at its two ends. The first end is relatively close to the second main vibrating body (1), and a tenon (16) is provided at the first end. Grooves (17) are provided on both opposite sidewalls of the tenon (16), and a connecting block (28) is provided at the second end. The blade clamping device (4) includes a blade attitude adjustment plate (18). The blade attitude adjustment plate (18) is evenly provided with a plurality of first mounting holes (19) in the circumferential direction. The mounting component passes through the first mounting hole (19) and extends into the second mounting hole. The blade attitude adjustment plate (18) is installed on the first inner wall. The blade attitude adjustment plate (18) can change the spatial attitude of the clamped blade (5) by rotating and changing the installation position. The blade attitude adjustment plate (18) has a mounting block (20) on the side wall away from the first inner wall. The blade clamping device (4) also includes an upper pad (21) and a lower pad (22) respectively set on the top and bottom of the tenon (16). The upper pad (21) and the lower pad (22) are both provided with a locking block (23) corresponding to the groove (17) on the side wall near the tenon (16). The mounting block (20) is provided with a mounting groove (24) that matches the lower pad (22). The upper pad (21) and the lower pad (22) are made of nylon material with low elastic modulus. The top of the mounting block (20) is provided with third mounting holes (25) on both sides of the mounting groove (24). The blade clamping device (4) also includes a pressure plate (26). The pressure plate (26) is set on the top of the upper pad (21). The pressure plate (26) is provided with a fourth mounting hole corresponding to the two third mounting holes (25). The set screw (27) extends through the fourth mounting hole into the third mounting hole (25). Thus, the locking blocks (23) of the upper pad (21) and the lower pad (22) are engaged in the groove (17) of the tenon (16). The pressure plate (26) and the mounting block (20) clamp the tenon (16). The blade clamping device (4) further includes a tooling support plate (29) and a blade gripper (30). The tooling support plate (29) is fixedly mounted on the second inner wall. The blade gripper (30) has a third side wall and a fourth side wall arranged opposite to each other. The third side wall is provided with a movable groove (31) corresponding to the tooling support plate (29), and the movable groove (31) and the tooling support plate (29) are movably sleeved together so that the blade gripper (30) and the tooling support plate (29) are aligned around the blade gripper (30) along the axis of the first direction. For rotation, the fourth side wall is provided with a receiving groove (32) corresponding to the connecting block (28) so that the connecting block (28) and the blade claw (30) can be engaged. When the connection between the blade attitude adjustment plate (18) and the first inner wall is released, and the blade attitude adjustment plate (18) is rotated, the connecting block (28) abuts against the inner wall of the receiving groove (32) and drives the blade claw (30) to rotate. The blade claw (30) and the tooling support plate (29) rotate relative to each other. The blade claw (30) is made of nylon.

2. The blade surface finishing device with multiple array closed cavities according to claim 1, characterized in that, The second main vibrating body (1) includes a second base plate (8), and a second connecting plate (9) is fixedly installed on the top of the second base plate (8). The second connecting plate (9) and the second base plate (8) are perpendicular to each other. The bottom of the second base plate (8) is provided with a base (10), and vibration isolation rubber (11) is provided between the second base plate (8) and the base (10). The second connecting plate (9) has a first sidewall and a second sidewall disposed opposite to each other in the first direction. The elastic component is disposed on the first sidewall. The elastic component includes a plurality of main vibration springs (12), and the plurality of main vibration springs (12) are evenly disposed on the first sidewall.

3. The blade surface finishing device with multiple array closed cavities according to claim 2, characterized in that, The first main vibrating body (2) includes a first base plate (13), which is parallel to the second base plate (8). A first connecting plate (14) is fixedly connected to the side wall of the first base plate (13) near the second main vibrating body (1). The first connecting plate (14) is parallel to the second connecting plate (9). The end of the main vibrating spring (12) away from the second main vibrating body (1) is connected to the first connecting plate (14). The blade polishing container (3) is disposed on the top of the first base plate (13), and the blade polishing container (3) has a first inner wall and a second inner wall opposite to each other in the first direction. The first inner wall is relatively close to the first connecting plate (14), and a plurality of second mounting holes are uniformly opened on the first inner wall.

4. A method for surface finishing of a blade with a multi-array closed cavity, comprising the blade surface finishing apparatus according to any one of claims 1-3, characterized in that, include: S01. Select a polishing block with a nominal size of d according to the blade (5) configuration itself; S02. Select n blades (5) and determine the rotation diameter D of the blade body (15). The rotation diameter D is the diameter of the circle formed by rotating the blade body (15) around its own axis at the point where the width is the largest. S03. Select a blade polishing container with length L and height H (3). S04. Determine the distance from the first blade (5) to the third inner wall as LP, such that LP ≥ D + 5d; and determine the distance from the nth blade (5) to the fourth inner wall as Lq, such that Lq ≥ D + 5d; wherein the third inner wall and the fourth inner wall are two side walls of the blade polishing container (3) in a third direction opposite to each other. S05. Determine the spacing between adjacent blades (5) as a set distance Li, Li = {L1, L2, L3, ..., Ln}, such that Li ≥ D + 5d, and L = LP + L1 + L2 + ... + Ln + Lq; S06. Determine the distance from the axis of the blade (5) to the bottom inner wall of the blade polishing container (3) as H1, and the distance from the axis of the blade (5) to the top inner wall of the blade polishing container (3) as H2, H1≥D / 2+5d, H2≥D / 2+5d, H=H1 +H2; S07. Insert n blades (5) into the blade polishing container (3) at a set distance Li through the blade clamping device (4), and fill in the polishing block and polishing fluid. S08. Start the excitation motor (6) to make the blade polishing container (3) move back and forth along the first direction, and the rolling polishing block polishes the blade (5). S09. After polishing for a preset time T minutes, stop the excitation motor (6), take out the blade (5), rotate the blade (5) by a preset angle β and put it back into the blade polishing container (3), polish the blade (5) again for a preset time T minutes and then take it out. S10. Repeat S07-S09 until the blade (5) is polished r times to complete the overall polishing. Take out the blade (5), clean it, and dry it for storage.

5. A method for surface finishing of a blade with a multi-array closed cavity according to claim 4, characterized in that, When LP and Lq are greater than D+10d, n blades (5) are arranged in an array inside the blade polishing container (3); when LP and Lq are less than D+10d, the first blade (5) and the nth blade (5) are set as contour workpieces.

6. A method for surface finishing of a blade with a multi-array closed cavity according to claim 4, characterized in that, The blade (5) axis is set to form a first preset angle α with the first plane, and the blade (5) axis is set to form a second preset angle λ with the second plane. The first plane is a vertical plane parallel to the third inner wall of the blade polishing container (3), and the second plane is a horizontal plane parallel to the bottom side wall of the blade polishing container (3). Wherein, -45°≤α≤45°, -45°≤λ≤45°.

7. The method for surface finishing of a blade with a multi-array closed cavity according to claim 4, characterized in that, The preset angle β satisfies 15°≤β≤90°.

8. The method for surface finishing of a blade with a multi-array closed cavity according to claim 4, characterized in that, 1≤r≤8, T≥10 minutes, the excitation frequency of the blade polishing container (3) is 30-45Hz, and the amplitude is 1.5-3mm.

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