A polishing apparatus suitable for use in polishing aero turbine blades

Abstract

The application provides a polishing device suitable for aviation turbine blades. The device comprises a base, a protective cover arranged above the base, a workbench formed at the top of the base in the protective cover, an upper feeding assembly, a grinding wheel polishing assembly, a sand belt polishing assembly and a polishing assembly arranged in sequence along an annular track, and a six-axis robot fixedly installed on the workbench for clamping the turbine blade. The upper feeding assembly comprises two symmetrical feeding units which can enter the protective cover in a loop and are used for conveying the turbine blades to be polished and the turbine blades whose polishing is completed, and the surface of the turbine blades is suctioned and dusted during movement. By integrating various polishing and polishing assemblies in the same station and cooperating with the multi-freedom movement of the six-axis robot, the continuous processing of different areas of the turbine blade is realized, the processing consistency and surface quality are improved, the operation safety is improved, and the influence of impurities on the polishing effect is reduced.

Description

Technical Field

[0001] This invention relates to the field of polishing equipment application technology, specifically polishing equipment suitable for aircraft turbine blades. Background Technology

[0002] Aero-engine turbine blades are one of the key components of aero-engines, typically operating under complex conditions of high temperature, high speed, and high load. Their complex shapes and high requirements for dimensional accuracy and surface quality necessitate careful attention to detail. Significant differences exist in the structural form and stress state of the blade root, blade body, and blade tip, demanding high uniformity and consistency in their surface finish. Therefore, the manufacturing process usually requires multiple grinding, finishing, and polishing processes to meet aerodynamic performance and service life requirements.

[0003] In existing processing methods, turbine blade grinding and polishing often employ a decentralized process layout, with different types of grinding or polishing operations typically completed by multiple machines. The workpiece needs to be transferred and repositioned multiple times between these machines, which not only increases the processing cycle and the level of manual intervention but also easily leads to positioning deviations due to repeated clamping, thus affecting the consistency of the turbine blade surface finish. Furthermore, due to the complex shape of turbine blades, it is difficult to maintain a stable and reasonable processing posture in some areas during grinding, easily resulting in problems such as under-grinding or over-grinding in certain areas.

[0004] Before turbine blades undergo integral grinding, their surfaces are inevitably covered with metal dust, machining debris, or environmental impurities. If the turbine blade surface is not effectively cleaned before integral grinding begins, or if dust and impurities are re-adhered during the loading process, these impurities are easily pressed onto the blade surface or drawn into the grinding contact area during subsequent grinding. This not only affects the stability of the grinding and polishing process but may also form scratches or local defects on the blade surface, thus adversely affecting the final surface quality.

[0005] Therefore, polishing equipment suitable for aircraft turbine blades is provided to address the above-mentioned problems. Summary of the Invention

[0006] This invention provides a polishing and grinding device suitable for aerospace turbine blades to address the problems of poor processing continuity and surface quality consistency caused by the dispersed operation of multiple devices and repeated transfers in the existing turbine blade grinding process, as well as the problem that impurities easily adhere to the surface of the turbine blade before overall grinding, affecting the grinding stability and finished product quality.

[0007] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0008] The present invention provides a polishing device suitable for aircraft turbine blades, including a base, a protective cover above the base, a worktable formed on the top surface of the base in the inner cavity of the protective cover, and a feeding assembly, a grinding wheel assembly, a sanding belt assembly and a polishing assembly arranged sequentially along a circular trajectory on the surface of the worktable, and a six-axis robot for clamping turbine blades is fixedly installed on the worktable.

[0009] The feeding assembly includes two symmetrically arranged feeding units. The two feeding units circulate into the protective cover. The rotating feeding units transport the turbine blades to be ground and take out the polished turbine blades. During the movement, the two feeding units suck up impurities placed on the surface of the turbine blades inside them.

[0010] The workbench integrates grinding wheel, belt, and polishing components, enabling simultaneous grinding of turbine blades. A six-axis robot grips and moves the turbine blades between these components, ensuring thorough grinding of all areas of the blades through its flexibility. Two reusable loading and unloading units separate the loading and unloading processes, guaranteeing operator safety. Furthermore, the unloading units can remove impurities from the turbine blade surface as they move in and out of the protective cover, preventing them from negatively impacting subsequent polishing.

[0011] In this technical solution, the feeding assembly also includes a steering motor, a transmission unit and a dust extraction unit. The steering motor drives the two feeding units connected to it to rotate, rotating 180° each time.

[0012] The steering motor drives the dust extraction unit through the transmission unit connected to it, and the dust extraction unit extracts impurities from the surface of the turbine blades inside the material discharge unit.

[0013] In this technical solution, the feeding unit includes a feeding box, which is provided with multiple feeding slots for placing turbine blades, and a dust extraction unit is provided at the bottom of the feeding box.

[0014] The steering motor drives the two material feeding boxes to rotate synchronously.

[0015] The dust extraction unit removes particulate impurities from the surface of the turbine blades inside the discharge chute.

[0016] In this technical solution, the steering motor is fixed on the worktable or the extension of the worktable. The output end of the steering motor is fixedly connected to the center of the bottom side wall of the support plate through the drive rod. Two feeding boxes are fixed on the top side wall of the support plate by two symmetrically arranged fixing rods. The feeding unit enters and exits the protective cover through the upper and lower feeding ports on the protective cover.

[0017] The transmission unit is located between the steering motor and the feeding box.

[0018] A vertically arranged partition plate is fixed at the top center of the support plate, which separates the two feeding units.

[0019] In this technical solution, the transmission unit includes a ring rack, a transmission gear, and a driven gear. The ring rack is sleeved around the steering motor and is coaxially arranged with the drive rod. Two transmission gears are meshed at the outer edge of the ring rack. The two transmission gears are respectively installed on the outer walls of the two dust extraction units. One side of the transmission gear is meshed with the driven gear, and the driven gear is connected to the dust extraction unit in a transmission connection.

[0020] The diameters of the ring rack, drive gear, and driven gear decrease sequentially. By increasing the transmission ratio, the rotational speed of the driven gear is increased, thereby generating sufficient suction airflow.

[0021] The ring rack is fixed to the worktable or an extension of the worktable by vertically distributed rods.

[0022] The transmission unit enables the steering motor to rotate the discharge box, which in turn drives the dust extraction unit to operate, thereby sucking up impurities.

[0023] In this technical solution, the dust extraction unit includes a guide shell, which is fixed to the bottom of the discharge shell. The bottom of the guide shell is connected to the top of the mounting shell, which has a circular cross-section. The inner cavity of the guide shell and the inner cavity of the mounting shell are interconnected. The inner cavity of the guide shell is interconnected with the inner cavity of the discharge trough through through holes evenly distributed on the bottom side wall of the discharge trough.

[0024] A dust extraction device is installed inside the housing, and the dust extraction device is connected to the driven gear.

[0025] The dust extraction component includes a self-rotating transmission rod inside the mounting housing, the bottom of which passes through the bottom sidewall of the mounting housing and is fixed to the center of the sidewall of the transmission gear.

[0026] A mounting plate is fixed to the top of the transmission rod, and multiple suction blades arranged in a ring array are fixed on the annular outer wall of the mounting plate.

[0027] The transmission rod is set vertically.

[0028] This technical solution also includes a vibration unit, which includes a pushing part and a striking part that are connected to each other through transmission. The pushing part is connected to the steering motor through transmission and rotates synchronously with it. During the rotation, it drives the striking part to move. During the movement, the striking part periodically strikes the turbine blades inside the discharge trough.

[0029] In this technical solution, the feeding box has a cuboid structure, and the feeding slots on the feeding box are distributed in a rectangular array. The feeding box is arranged tangentially along its circular rotation trajectory. The striking part includes multiple parallel supporting horizontal bars. One end of the supporting horizontal bar is located outside the feeding box, and the other end passes through all the feeding slots in a row or column in sequence. That is, all the feeding slots in a column or row are passed through by the same supporting horizontal bar. The number of supporting horizontal bars corresponds to the number of columns or rows of all feeding slots. Multiple striking limiting plates are fixed on the supporting horizontal bars. The striking limiting plates are located inside the feeding slots, and one striking limiting plate is set inside each feeding slot.

[0030] The supporting crossbar can slide horizontally, and a connecting protrusion is fixed on the end of the supporting crossbar located outside the feeding box. Two adjacent connecting protrusions are fixedly connected to each other by a synchronizing rod. At least one connecting protrusion located in the middle area is connected to the moving pushing part.

[0031] Because the feeding box is tangentially positioned along its circular rotation path, one or two connecting protrusions located in the central area will be closest to the center of the circular path, and the closest connecting protrusion will overlap with the push plate.

[0032] In this technical solution, both sides of the load-bearing crossbar are fixed with guide telescopic rods perpendicular to it. Springs are sleeved on the surface of the guide telescopic rods, and the two ends of the springs are fixed to the two ends of the guide telescopic rods. The guide telescopic rods are installed on the feeding box.

[0033] When the load-bearing crossbar slides along the direction of the guide telescopic rod, it forms a sliding through groove distributed in the horizontal direction on the feeding box. The guide telescopic rod is preferably fixed on the inner wall of the sliding through groove.

[0034] In this technical solution, the pushing part includes multiple pushing members arranged in a ring array. Each pushing member includes a support rod, and a pushing plate is rotatably connected to the top of the support rod. A coil spring is provided at the rotatable connection between the pushing plate and the support rod, and the movable pushing plate can overlap with the corresponding connecting protrusion.

[0035] The two working ends of the coil spring are fixed to the push plate and the bearing rod, respectively. When the coil spring does not deform, the push plate is distributed vertically, and the bearing rod is preferably fixed to the ring rack.

[0036] During manual feeding, the operator inserts the turbine blade into the feeding trough. The inserted turbine blade first overlaps with the bent end, and the inclined surface formed by the bent end pushes the striking limit plate to move, causing the spring to undergo a slight deformation. The spring's elasticity then fixes the turbine blade in place.

[0037] In this technical solution, the grinding wheel assembly includes a first mounting base, which is fixed on the worktable. A first motor is fixed on the top of the first mounting base, and a grinding wheel is fixed on the output end of the first motor.

[0038] In this technical solution, the belt abrasive assembly includes a mounting frame fixed on the worktable, a second motor fixed on the mounting frame, a drive pulley fixed on the output end of the second motor, at least one driven pulley on one side of the drive pulley, the driven pulley is mounted on the mounting frame and can rotate, and the same abrasive belt in a taut state is wound around the drive pulley and the driven pulley.

[0039] In this technical solution, the polishing assembly includes at least two third motors. The third motors are fixed to the worktable via a second mounting base, and a polishing wheel is fixed to the output end of the third motor.

[0040] The roughness of the polishing wheel on each third motor is different.

[0041] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0042] The positive and progressive effects of this invention are as follows:

[0043] By integrating grinding wheel, belt, and polishing components on the worktable, turbine blades can undergo different forms of surface grinding and finishing treatments sequentially within the same processing station. This avoids positioning errors and efficiency losses caused by frequent workpiece transfers between multiple machines, significantly improving the continuity and consistency of the overall turbine blade grinding process. The use of a six-axis robot to clamp and transfer the turbine blades between the grinding components fully utilizes the robot's multi-degree-of-freedom motion flexibility, ensuring that different areas of the turbine blade, such as the blade root, blade body, and blade tip, are ground in appropriate postures. This effectively reduces localized missed or over-grinding, improving the uniformity and stability of the finished product's surface quality.

[0044] Meanwhile, by setting up two cyclical feeding and unloading units, the workpiece feeding and unloading processes are physically separated, avoiding direct contact between operators and the grinding area during equipment operation, thus improving overall operational safety. During the feeding unit's movement in and out of the protective cover, the turbine blade surface undergoes simultaneous dust extraction, promptly removing metal dust and grinding debris adhering to the blade surface. This prevents impurities from being further compressed or embedded in the blade surface during subsequent polishing, thereby further improving the polishing effect and reducing the risk of surface defects. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0046] Figure 2 For the present invention Figure 1 A schematic diagram of the side view structure;

[0047] Figure 3For the present invention Figure 1 A schematic diagram of the structure after the cover is removed;

[0048] Figure 4 For the present invention Figure 3 A structural diagram from another perspective;

[0049] Figure 5 For the present invention Figure 3 A top-view structural diagram;

[0050] Figure 6 This is a schematic diagram of the overall structure of the feeding assembly of the present invention;

[0051] Figure 7 For the present invention Figure 6 A schematic diagram of the structure viewed from below;

[0052] Figure 8 This is a schematic diagram of the overall structure of the feeding component of the present invention after one of the feeding units has been hidden.

[0053] Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure at point I;

[0054] Figure 10 For the present invention Figure 8 A top-view structural diagram;

[0055] Figure 11 For the present invention Figure 10 Schematic diagram of the cross-sectional structure at point AA;

[0056] Figure 12 This is a schematic diagram of the structure of the striking part of the present invention;

[0057] Figure 13 For the present invention Figure 12 A magnified schematic diagram of the structure at point J;

[0058] Figure 14 For the present invention Figure 11 A magnified schematic diagram of the structure at point K.

[0059] Explanation of reference numerals in the attached figures

[0060] 1. Base; 11. Workbench; 12. Protective cover; 13. Loading and unloading ports;

[0061] 2. Feeding assembly; 21. Discharge box; 211. Discharge chute; 212. Guide shell; 213. Mounting shell; 214. Sliding groove; 22. Divider plate; 23. Bearing plate; 231. Fixing rod; 24. Steering motor; 241. Drive rod; 25. Guide part; 251. Guide slide rail; 252. Guide slider; 253. Connecting rod; 26. Transmission part; 261. Ring rack; 262. Transmission gear; 263. Driven gear; 27. Dust extraction part; 271. Transmission rod; 272. Mounting plate; 273. Exhaust vane; 28. Pushing part; 281. Bearing rod; 282. Pushing plate; 29. ​​Striking part; 291. Bearing crossbar; 292. Striking limit plate; 2921. Bending end; 293. Guide telescopic rod; 294. Connecting protrusion; 295. Synchronizing rod;

[0062] 3. Grinding wheel assembly; 31. First mounting base; 32. First motor; 33. Grinding wheel;

[0063] 4. Belt sander assembly; 41. Mounting bracket; 42. Second motor; 43. Drive pulley; 44. Driven pulley; 45. Sanding belt;

[0064] 5. Six-axis robot;

[0065] 6. Polishing assembly; 61. Second mounting base; 62. Third motor; 63. Polishing wheel. Detailed Implementation

[0066] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0067] like Figure 1 and Figure 2 As shown, a polishing equipment suitable for aircraft turbine blades includes a base 1, a protective cover 12 is provided above the base 1, and a worktable 11 is formed on the top surface of the base 1 in the inner cavity of the protective cover 12. The surface of the worktable 11 is sequentially provided with a feeding assembly 2, a grinding wheel assembly 3, a sanding belt assembly 4 and a polishing assembly 6 along a circular track. A six-axis robot 5 for clamping turbine blades is fixedly installed on the worktable 11.

[0068] The feeding assembly 2 includes two symmetrically arranged feeding units. The two feeding units circulate into the protective cover 12. The rotating feeding units transport the turbine blades to be ground and take out the turbine blades that have been polished. During the movement, the two feeding units suck up the impurities placed on the surface of the turbine blades inside them.

[0069] The grinding wheel assembly 3, the belt grinding assembly 4, and the polishing assembly 6 are integrated on the worktable 11, which can complete the grinding of the turbine blades in one go. At the same time, the six-axis robot 5 is used to clamp and move the turbine blades between the various components. The flexibility of the six-axis robot 5 ensures that all areas of the turbine blades are fully ground.

[0070] Two recirculating feeding and unloading units separate the feeding and unloading processes, ensuring the safety of operators. At the same time, during the process of the feeding unit entering and exiting the protective cover 12, impurities on the surface of the turbine blades can be sucked out, thereby avoiding the adverse effects of impurities on subsequent polishing.

[0071] Example 1:

[0072] In this embodiment, as Figures 6-8 As shown, the feeding assembly 2 also includes a steering motor 24, a transmission unit 26 and a dust extraction unit 27. The steering motor 24 drives the two feeding units connected to it to rotate, rotating 180° each time.

[0073] The steering motor 24 drives the dust extraction unit 27 through the transmission unit 26 connected to it, and the dust extraction unit 27 extracts impurities from the surface of the turbine blades inside the discharge unit.

[0074] The feeding unit includes a feeding box 21, which is provided with multiple feeding slots 211 for placing turbine blades, and a dust extraction section 27 is provided at the bottom of the feeding box 21.

[0075] The steering motor 24 drives the two material feeding boxes 21 to rotate synchronously.

[0076] The dust extraction unit 27 extracts particulate impurities from the surface of the turbine blades inside the discharge chute 211.

[0077] Specifically, the steering motor 24 is fixed on the workbench 11 or the extension of the workbench 11. The output end of the steering motor 24 is fixedly connected to the center of the bottom side wall of the support plate 23 through the drive rod 241. Two feeding boxes 21 are fixed on the top side wall of the support plate 23 through two symmetrically arranged fixing rods 231. The feeding unit enters and exits the protective cover 12 through the loading and unloading ports 13 on the protective cover 12.

[0078] The transmission unit 26 is located between the steering motor 24 and the feeding box 21.

[0079] A vertically arranged partition plate 22 is fixed at the top center of the support plate 23, which separates the two feeding units.

[0080] The transmission unit 26 includes an annular rack 261, a transmission gear 262, and a driven gear 263. The annular rack 261 is sleeved around the steering motor 24 and is coaxially arranged with the drive rod 241. Two transmission gears 262 are meshed at the outer edge of the annular rack 261. The two transmission gears 262 are respectively installed on the outer wall of the two dust extraction units 27. One side of the transmission gear 262 is meshed with the driven gear 263, and the driven gear 263 is connected to the dust extraction unit 27 in a transmission connection.

[0081] The diameters of the ring rack 261, the drive gear 262, and the driven gear 263 decrease sequentially. The rotational speed of the driven gear 263 is increased by the transmission ratio, thereby generating sufficient suction airflow.

[0082] The ring rack 261 is fixed to the worktable 11 or the extension of the worktable 11 by vertically distributed rods.

[0083] By setting up the transmission unit 26, the steering motor 24 drives the material feeding box 21 to rotate while simultaneously driving the dust extraction unit 27 to operate, realizing the linkage control between the dust extraction action and the movement of the material feeding box 21 in and out, without the need for an additional independent drive source. On the one hand, it can promptly extract and remove dust, debris, and other impurities from inside the material feeding box 21 and the surface of the turbine blades during its rotation and movement in and out of the protective cover 12, preventing impurities from being brought back into the processing area during subsequent grinding or polishing. On the other hand, the synchronous operation of the dust extraction unit 27 through mechanical linkage simplifies the overall machine structure, reduces control complexity, and improves the consistency and reliability of the dust extraction timing and the material feeding action.

[0084] like Figure 11 and Figure 14 As shown, the dust extraction unit 27 includes a guide shell 212, which is fixed to the bottom of the discharge shell. The bottom of the guide shell 212 is connected to the top of the mounting shell 213 with a circular cross-section. The inner cavity of the guide shell 212 and the inner cavity of the mounting shell 213 are interconnected. The inner cavity of the guide shell 212 is interconnected with the inner cavity of the discharge trough 211 through through holes evenly distributed on the bottom side wall of the discharge trough 211.

[0085] A dust extraction component is installed inside the housing 213, and the dust extraction component is connected to the driven gear 263.

[0086] The dust extraction component includes a self-rotating transmission rod 271 inside the mounting housing 213. The bottom of the transmission rod 271 passes through the bottom side wall of the mounting housing 213 and is fixed to the center of the side wall of the transmission gear 262.

[0087] A mounting plate 272 is fixed to the top of the transmission rod 271, and multiple suction blades 273 arranged in a ring array are fixed on the annular outer wall of the mounting plate 272.

[0088] The transmission rod 271 is set vertically.

[0089] When the steering motor 24 drives the two discharge boxes 21 to rotate synchronously, the transmission gear 262, which rotates synchronously with the discharge box 21, moves along the circular rack 261 in a circular trajectory. Since the transmission gear 262 and the circular rack 261 are meshed, and the position of the circular rack 261 is fixed, the transmission gear 262 rotates during the movement. The rotating transmission gear 262 further drives the driven gear 263 meshing with it to rotate synchronously, thereby driving the transmission rod 271 and the mounting plate 272 located at the end of the transmission rod 271 to rotate. During the rotation, the mounting plate 272 drives the suction blades 273 to rotate and form an airflow, thereby achieving dust removal from the inside of the discharge trough 211.

[0090] Example 2:

[0091] like Figures 8-13 As shown, it also includes a vibration unit, which includes a pushing part 28 and a striking part 29 that are connected to each other through transmission. The pushing part 28 is connected to the steering motor 24 through transmission and rotates synchronously with it. During the rotation, it drives the striking part 29 to move. During the movement, the striking part 29 periodically strikes the turbine blades inside the discharge trough 211.

[0092] By tapping the turbine blades, impurities such as metal dust and grinding debris adhering to the blade surface are loosened and shaken off under vibration, thereby weakening the adhesion between the impurities and the blade surface. Combined with the airflow guidance of the suction device around the blades, the shaken-off or suspended impurities can be sucked out in time, effectively improving the thoroughness and efficiency of impurity removal, avoiding the adverse effects of impurity residue on subsequent grinding or polishing processes, and thus helping to improve the stability of the turbine blade surface processing quality.

[0093] The feeding box 21 has a cuboid structure, and the feeding slots 211 on the feeding box 21 are arranged in a rectangular array. The feeding box 21 is arranged tangentially along its circular rotation trajectory. The striking part 29 includes a plurality of parallel supporting horizontal bars 291. One end of the supporting horizontal bar 291 is located outside the feeding box 21, and the other end passes through all the feeding slots 211 in a row or column in sequence. That is, all the feeding slots in a column or row are passed through by the same supporting horizontal bar 291. The number of supporting horizontal bars 291 corresponds to the number of columns or rows of all feeding slots 211. A plurality of striking limiting plates 292 are fixed on the supporting horizontal bars 291. The striking limiting plates 292 are located inside the feeding slots 211, and one striking limiting plate 292 is provided inside each feeding slot 211.

[0094] The supporting crossbar 291 can slide in the horizontal direction, and a connecting protrusion 294 is fixed on the end of the supporting crossbar 291 located outside the material box 21. Two adjacent connecting protrusions 294 are fixedly connected to each other by a synchronizing rod 295. At least one connecting protrusion 294 located in the middle area is connected to the moving push part 28 for transmission.

[0095] Since the feeding box 21 is tangentially arranged along its circular trajectory of rotation, one or two connecting protrusions 294 located in the central area will be closest to the center of the circular trajectory, and the closest connecting protrusion 294 will overlap with the push plate 282.

[0096] Both sides of the supporting crossbar 291 are fixed with guide telescopic rods 293 perpendicular to it. Springs are sleeved on the surface of the guide telescopic rods 293, and the two ends of the springs are fixed to the two ends of the guide telescopic rods 293. The guide telescopic rods 293 are installed on the feeding box 21.

[0097] like Figure 9 As shown, when the bearing crossbar 291 slides along the direction of the guide telescopic rod 293, it forms a sliding through groove 214 distributed in the horizontal direction on the feeding box 21. The guide telescopic rod 293 is preferably fixed on the inner wall of the sliding through groove 214.

[0098] The pushing part 28 includes a plurality of pushing members arranged in a ring array. Each pushing member includes a support rod 281. A pushing plate 282 is rotatably connected to the top of the support rod 281. A coil spring is provided at the rotatable connection between the pushing plate 282 and the support rod 281. The movable pushing plate 282 can overlap with the corresponding connecting protrusion 294.

[0099] The two working ends of the coil spring are fixed on the push plate 282 and the bearing rod 281 respectively. When the coil spring does not deform, the push plate 282 is distributed vertically, and the bearing rod 281 is preferably fixed on the annular rack 261.

[0100] When the spring does not deform, the tapping limit plate 292 is located on one side inside the feeding groove 211, and the top area of ​​the feeding plate bends outward to form a bent end 2921.

[0101] The striking parts 29 inside the two feeding boxes 21 are arranged symmetrically at the center with a symmetry angle of 180°. The center of the symmetry is the center of the circular trajectory of the feeding box 21.

[0102] During manual feeding, the operator inserts the turbine blade into the feeding trough 211. The inserted turbine blade first overlaps with the bent end 2921. The inclined surface formed by the bent end 2921 pushes the striking limit plate 292 to move, causing the spring to undergo a slight deformation. The spring force is used to fix the turbine blade.

[0103] Preferably, a limiting sleeve is provided on the side wall inside the discharge trough 211. The limiting sleeve cooperates with the outer edge of the turbine blade to limit the turbine blade. The limiting sleeve and the striking limiting plate 292 are located on the inner walls of two opposite sides of the discharge trough 211.

[0104] When the feeding box 21 rotates, the connecting convex plate 294 also rotates. After the rotating connecting convex plate 294 overlaps with the fixed push plate 282, the connecting convex plate 294 cannot move, thereby pushing the bearing crossbar 291 to slide along the direction of the guide telescopic rod 293. The guide telescopic rod 293 shortens, the spring is compressed, and at the same time, it drives the striking limit plate 292 to move away from the turbine blade.

[0105] After the guide telescopic rod 293 is compressed to its limit position, the connecting convex plate 294 stops moving. The no-moving connecting convex plate 294 pushes the push plate 282 to rotate backward until the connecting convex plate 294 disengages from the push plate 282. During the above process, the coil spring deforms.

[0106] When the push plate 282 disengages from the connecting convex plate 294, the spring, which has accumulated elastic potential energy, instantly recovers its deformation, causing the striking limit to strike the turbine blade, thus completing the striking.

[0107] Example 3:

[0108] This embodiment is derived based on Embodiment 1, such as... Figure 7 As shown, it also includes a guide part 25 for maintaining the smooth rotation of the feeding box 21. The guide part 25 includes an annular guide slide rail 251 coaxially arranged with the running trajectory of the feeding box 21. Two guide sliders 252 are slidably connected on the guide slide rail 251. The two guide sliders 252 are respectively fixed to the bottom of the two feeding boxes 21. The guide slide rail 251 is fixed to the worktable 11 or the extension surface of the worktable 11 by multiple evenly distributed connecting rods 253.

[0109] By sliding the guide slider 252 on the guide rail 251, the feeding box 21, which is fixedly connected to the guide slider 252, rotates more smoothly, while the guide slider 252 and the guide rail 251 can support the feeding box 21.

[0110] The grinding wheel assembly 3 includes a first mounting base 31, which is fixed on the worktable 11. A first motor 32 is fixed on the top of the first mounting base 31, and a grinding wheel 33 is fixed on the output end of the first motor 32.

[0111] The belt abrasive assembly 4 includes a mounting bracket 41 fixed on the worktable 11, a second motor 42 fixed on the mounting bracket 41, a drive pulley 43 fixed on the output end of the second motor 42, at least one driven pulley 44 is provided on one side of the drive pulley 43, the driven pulley 44 is mounted on the mounting bracket 41 and can rotate, and the same tensioned abrasive belt 45 is wound around the drive pulley 43 and the driven pulley 44.

[0112] The polishing assembly 6 includes at least two third motors 62, which are fixed to the worktable 11 by a second mounting base 61, and polishing wheels 63 are fixed to the output end of the third motors 62.

[0113] The roughness of the polishing wheel 63 on each third motor 62 is different.

[0114] During processing, the turbine blades to be polished are manually inserted into the feeding trough 211. After completion, the two feeding boxes 21 are rotated 180° by a steering motor, thus exchanging positions and conveying the turbine blades to be polished into the protective cover 12. Then, a six-axis robot 5 picks up the turbine blades inside the feeding trough 211 and makes them pass through the grinding wheel assembly 3, the sanding belt assembly 4, and the polishing assembly 6 in sequence for polishing, finally shaping them. After polishing, the six-axis robot 5 inserts them back into the original feeding trough 211. The above steps are repeated until all the turbine blades on the corresponding feeding box 21 have been polished, and then the next feeding box 21 is replaced.

[0115] The six-axis robot 5 in this application belongs to the mature and widely used prior art in this field. It has multi-degree-of-freedom motion capability, programmable trajectory control, and high positioning accuracy, and can realize operations such as workpiece grasping, turning, and transferring in space. In this embodiment, the six-axis robot 5 does not constitute the inventive point of this application, and its specific structure and control method can adopt any mature solution in the prior art.

[0116] Based on the turbine blade's dimensions, weight, and clamping position requirements, a six-axis robot 5 with appropriate load capacity and working stroke is selected. A clamping mechanism capable of gripping the turbine blade is then configured at its end to achieve stable grasping and handling of the turbine blade. The specific structure of the clamping mechanism can also utilize existing mechanical grippers, dedicated clamps, or other equivalent clamping devices as needed, without affecting the realization of the technical solution of this application.

[0117] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. A polishing device for aircraft turbine blades, comprising a base (1), a protective cover (12) above the base (1), a worktable (11) formed on the top surface of the base (1) within the inner cavity of the protective cover (12), a feeding assembly (2), a grinding wheel assembly (3), a sanding belt assembly (4), and a polishing assembly (6) sequentially arranged along a circular trajectory on the surface of the worktable (11), and a six-axis robot (5) for clamping turbine blades fixedly mounted on the worktable (11), characterized in that: The feeding assembly (2) includes two symmetrically arranged feeding units. The two feeding units circulate into the protective cover (12). During the movement, the two feeding units suck up impurities placed on the surface of the turbine blades inside them. The feeding assembly (2) also includes a steering motor (24), a transmission unit (26), and a dust extraction unit (27). The steering motor (24) drives the two feeding units connected to it to rotate. The steering motor (24) drives the dust extraction unit (27) to run through the transmission unit (26) connected to it. The dust extraction unit (27) extracts impurities from the surface of the turbine blades inside the discharge unit. The feeding unit includes a feeding box (21), which is provided with a plurality of feeding slots (211) for placing turbine blades, and a dust extraction part (27) is provided at the bottom of the feeding box (21). The steering motor (24) drives the two feeding boxes (21) to rotate synchronously; The steering motor (24) is fixed on the workbench (11) or the extension of the workbench (11). The output end of the steering motor (24) is fixedly connected to the bottom side wall of the support plate (23) through the drive rod (241). Two material boxes (21) are fixed on the top side wall of the support plate (23) by two symmetrically arranged fixing rods (231). The transmission unit (26) is disposed between the steering motor (24) and the feeding box (21); The transmission unit (26) includes an annular rack (261), a transmission gear (262), and a driven gear (263). The annular rack (261) is sleeved around the steering motor (24) and is coaxially arranged with the drive rod (241). Two transmission gears (262) are meshed at the outer edge of the annular rack (261). The two transmission gears (262) are respectively installed on the outer wall of the two dust extraction units (27). One side of the transmission gear (262) is meshed with the driven gear (263). The driven gear (263) is connected to the dust extraction unit (27) in a transmission connection. The dust extraction unit (27) includes a guide shell (212), which is fixed to the bottom of the discharge shell. The bottom of the guide shell (212) is connected to the top of the mounting shell (213) with a circular cross-section. The inner cavity of the guide shell (212) and the inner cavity of the mounting shell (213) are interconnected. The inner cavity of the guide shell (212) is interconnected with the inner cavity of the discharge trough (211) through through holes evenly distributed on the bottom side wall of the discharge trough (211). A dust extraction component is installed in the inner cavity of the mounting housing (213), and the dust extraction component is connected to the driven gear (263) for transmission. The dust extraction component includes a self-rotating transmission rod (271) inside the mounting housing (213), the bottom of which passes through the bottom side wall of the mounting housing (213) and is fixed to the center of the side wall of the transmission gear (262). The top of the transmission rod (271) is fixed with a mounting plate (272), and a plurality of suction blades (273) arranged in a ring array are fixed on the annular outer wall of the mounting plate (272).

2. The polishing equipment for aircraft turbine blades as described in claim 1, characterized in that: It also includes a vibration unit, which includes a driving part (28) and a striking part (29) that are connected to each other; the driving part (28) is connected to the steering motor (24) and rotates synchronously with it, and drives the striking part (29) to move during the rotation process, and the striking part (29) periodically strikes the turbine blades inside the feed trough (211) during the movement process.

3. The polishing equipment for aircraft turbine blades as described in claim 2, characterized in that: The feeding box (21) has a cuboid structure, and the feeding slots (211) on the feeding box (21) are arranged in a rectangular array. The feeding box (21) is arranged tangentially along its circular rotation trajectory. The striking part (29) includes multiple parallel supporting crossbars (291). One end of the supporting crossbar (291) is located outside the feeding box (21), and the other end passes through all the feeding slots (211) arranged in a row or column. Multiple striking limiting plates (292) are fixed on the supporting crossbar (291). The striking limiting plates (292) are located inside the feeding slots (211). The bearing crossbar (291) can slide in the horizontal direction, and a connecting plate (294) is fixed on the end of the bearing crossbar (291) located outside the feeding box (21). Two adjacent connecting plates (294) are fixedly connected to each other by a synchronizing rod (295). At least one connecting plate (294) located in the middle area is connected to the moving pushing part (28) in a transmission connection.

4. The polishing equipment for aircraft turbine blades as described in claim 3, characterized in that: The pushing part (28) includes a plurality of pushing members arranged in a ring array. The pushing member includes a support rod (281). The top of the support rod (281) is rotatably connected to a pushing plate (282). A coil spring is provided at the rotatable connection between the pushing plate (282) and the support rod (281). The movable pushing plate (282) can overlap with the corresponding connecting protrusion (294).

5. The polishing equipment for aircraft turbine blades as described in claim 1, characterized in that: The grinding wheel assembly (3) includes a first mounting base (31), which is fixed on the worktable (11). A first motor (32) is fixed on the top of the first mounting base (31), and a grinding wheel (33) is fixed on the output end of the first motor (32). The belt abrasive assembly (4) includes a mounting frame (41) fixed on the worktable (11), a second motor (42) fixed on the mounting frame (41), a drive pulley (43) fixed on the output end of the second motor (42), at least one driven pulley (44) is provided on one side of the drive pulley (43), the driven pulley (44) is mounted on the mounting frame (41) and can rotate, and the same abrasive belt (45) is wound around the drive pulley (43) and the driven pulley (44). The polishing assembly (6) includes at least two third motors (62), which are fixed on the worktable (11) by a second mounting base (61), and a polishing wheel (63) is fixed on the output end of the third motor (62).

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