Turbine blade flexible clamping device and clamping method

Abstract

The invention discloses a flexible clamping device and method for turbine blades, and relates to the field of turbine blade machining, a bottom flexible supporting mechanism comprises a bottom base body and a plurality of supporting pistons installed on the upper portion of the bottom base body in a sliding mode, and the bottom base body is used for being connected with an inflation and deflation device; the flexible clamping mechanism comprises an installation support, an upper flexible clamping assembly, a lower flexible clamping assembly and two side flexible clamping assemblies. The upper base body, the lower base body and the two side base bodies are used for being connected with an inflation and deflation device. The bottom flexible supporting mechanism, the upper flexible clamping assembly, the lower flexible clamping assembly and the side flexible clamping assemblies all adopt a pneumatic driving mode, and a plurality of supporting pistons, a plurality of upper pistons, a plurality of lower pistons and a plurality of side pistons uniformly apply flexible clamping force to the turbine blade, so that deformation generated in the machining process of the turbine blade is effectively controlled; and the device can be suitable for turbine blades of different structures, and the application range is widened.

Description

Technical Field

[0001] The invention relates to the field of turbine blade processing, and in particular to a flexible clamping device and a clamping method for turbine blades. Background Art

[0002] At present, among the aero-engine parts, the processing of aero-engine core components such as turbine discs and turbine blades has become one of the important indicators for measuring the internal manufacturing capabilities and processing levels of aero-engine enterprises due to its high technical requirements and complex process. Turbine blades contain complex and weak rigid structures such as tenons and blade bodies, and the clamping method largely determines its processing accuracy.

[0003] The clamping during the milling of aircraft engine turbine blades is mainly divided into positioning and clamping. Positioning is to ensure that the parts occupy the correct position during the processing, and the purpose of clamping is to prevent the turbine blades from deforming during the processing, which is unfavorable to the processing of turbine blades. In the positioning process, a convenient, fast and easy-to-operate positioning method is required. Due to its special thin-walled structure, turbine blades are very easy to deform, so the clamping method also determines the degree of deformation of the turbine blades and is related to the surface quality of turbine blade processing.

[0004] Existing turbine blade clamping devices and methods have shortcomings and limitations. Specifically, some blade clamps have poor clamping effects, resulting in large machining deformation due to weak rigidity during blade milling, making it difficult to ensure machining surface quality, and affecting machining accuracy. Some blade clamps can only clamp blades of specific shapes, are not universal, and have limited scope of application. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a flexible clamping device and clamping method for turbine blades, which effectively control the deformation generated during the processing of turbine blades and improve the scope of application.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a flexible clamping device for turbine blades, comprising a first worktable, a first rotation driving component, a first turntable, a second worktable, a second rotation driving component, a second turntable, a linear telescopic driving component, a bottom flexible supporting mechanism and two flexible clamping mechanisms, wherein the second worktable is arranged on one side of the first worktable, the first rotation driving component is arranged on the first worktable and is used to drive the first turntable to rotate in a horizontal direction, the second rotation driving component is arranged on the second worktable and is used to drive the second turntable to rotate in a horizontal direction; the bottom flexible supporting mechanism is arranged between the first worktable and the second worktable, the bottom flexible supporting mechanism comprises a bottom base and a plurality of supporting pistons slidably mounted on the upper part of the bottom base, the bottom base is used to be connected to an inflation and deflation device; one of the flexible clamping mechanisms is fixed on the first turntable, the other of the flexible clamping mechanisms is slidably mounted on the second turntable, the linear telescopic driving component is used to drive the other The flexible clamping mechanism moves toward or away from the flexible clamping mechanism on the first turntable; the flexible clamping mechanism includes a mounting bracket, an upper flexible clamping assembly, a lower flexible clamping assembly and two side flexible clamping assemblies, the upper flexible clamping assembly includes an upper base and a plurality of upper pistons slidably mounted on the lower part of the upper base, the upper base is arranged on the upper part of the mounting bracket and is used to connect with the inflation and deflation device, the lower flexible clamping assembly includes a lower base and a plurality of lower pistons slidably mounted on the upper part of the lower base, the lower base is arranged on the lower part of the mounting bracket and is used to connect with the inflation and deflation device, the two side flexible clamping assemblies are symmetrically arranged on both sides of the interior of the mounting bracket, the side flexible clamping assembly includes a side base and a plurality of side pistons slidably mounted on one side of the side base, the side base is arranged on one side of the interior of the mounting bracket and is used to connect with the inflation and deflation device, and the side pistons of each side flexible clamping assembly are arranged on a side close to another side flexible clamping assembly.

[0008] Preferably, the first workbench includes a first supporting platform and a first mounting platform arranged at an end of the first supporting platform away from the second workbench, the first rotating driving component is a first rotating motor, the first rotating motor is arranged on a side of the first mounting platform close to the second workbench, a first circular plate is fixedly sleeved on the power output shaft of the first rotating motor, the first turntable is fixed to the lower part of the first circular plate close to the second workbench, a first circular groove is arranged on the upper part of the first supporting platform, the bottom of the first turntable is an arc structure matching the first arc groove structure, and the central axis of the power output shaft of the first rotating motor, the central axis of the first circular plate and the central axis of the arc structure at the bottom of the first turntable are arranged colinearly.

[0009] Preferably, the second workbench includes a second supporting platform and a second mounting platform arranged at an end of the second supporting platform away from the first workbench, the second rotating driving component is a second rotating motor, the second rotating motor is arranged on a side of the second mounting platform close to the first workbench, a second circular plate is fixedly sleeved on the power output shaft of the second rotating motor, the second turntable is fixed to the lower part of the second circular plate close to the first workbench, a second arc groove is arranged on the upper part of the second supporting platform, the bottom of the second turntable is an arc structure matching the second arc groove structure, the central axis of the power output shaft of the second rotating motor, the central axis of the second circular plate and the central axis of the arc structure at the bottom of the second turntable are colinearly arranged, the linear telescopic driving component is arranged on the second circular plate and is located above the second turntable, the telescopic end of the linear telescopic driving component is connected to the mounting bracket of the flexible clamping mechanism on the second turntable.

[0010] Preferably, a plurality of parallel slide rails are arranged on the upper portion of the second turntable, a plurality of sliders are arranged on the lower portion of the mounting bracket of the flexible clamping mechanism mounted on the second turntable, and each slider is slidably mounted on one of the slide rails.

[0011] Preferably, the mounting bracket of the flexible clamping mechanism installed on the first turntable is fixed to one end of the first turntable close to the second turntable, and a positioning mechanism is provided on the first turntable, the positioning mechanism includes a bottom plate, a top plate, a positioning plate, a rotating shaft, a stud and a positioning nut, one end of the top plate close to the second turntable is connected to the top of the mounting bracket on the first turntable, and one end of the bottom plate close to the second turntable is connected to the bottom of the mounting bracket on the first turntable, the stud and the rotating shaft are respectively fixed to the top and bottom of the positioning plate, the rotating shaft is rotatably installed on the bottom plate through a bearing, the stud passes through the top plate and extends to the top, and the positioning nut is installed on the stud and is located above the top plate.

[0012] Preferably, a plurality of cylindrical grooves are provided on the upper portion of the bottom substrate, a flow channel is provided on the lower portion of the bottom substrate, one end of the flow channel penetrates through one side of the bottom substrate to form a first air hole, the first air hole is used to connect with the inflation and deflation device, the bottom of each cylindrical groove is connected with the flow channel through a connecting hole, an annular buffer gasket is fixed at the bottom of each cylindrical groove, a supporting piston is slidably provided in each cylindrical groove, an annular sealing layer is provided on the inner wall of the cylindrical groove, and the supporting piston is fitted with the annular sealing layer.

[0013] Preferably, the upper base is a hollow structure, and a plurality of upper mounting holes are provided at the bottom of the upper base. The upper piston includes an upper cylinder and an upper limit plate provided on the top of the upper cylinder. The upper cylinder is slidably installed in the upper mounting hole. A first sealing ring is provided on the inner wall of the upper mounting hole. The upper cylinder fits with the first sealing ring. The upper limit plate is located in the upper base and is used to limit the upper cylinder. A second air hole is provided on one side of the upper base, and the second air hole is used to connect with the inflation and deflation device.

[0014] Preferably, the lower base is a hollow structure, and a plurality of lower mounting holes are provided on the top of the lower base. The lower piston includes a lower cylinder and a lower limit plate provided at the bottom of the lower cylinder. The lower cylinder is slidably installed in the lower mounting hole. A second sealing ring is provided on the inner wall of the lower mounting hole, and the lower cylinder fits with the second sealing ring. The lower limit plate is located in the lower base and is used to limit the lower cylinder. A third air hole is provided on one side of the lower base, and the third air hole is used to connect with the inflation and deflation device.

[0015] Preferably, the side base is a hollow structure, and a plurality of side mounting holes are provided on one side of the side base. The side piston includes a side column and a side limit plate provided on one side of the side column. The side column is slidably installed in the side mounting hole. A third sealing ring is provided on the inner wall of the side mounting hole. The side column fits with the third sealing ring. The side limit plate is located in the side base and is used to limit the side column. A fourth air hole is provided on one side of the side base, and the fourth air hole is used to connect with the inflation and deflation device.

[0016] The present invention also provides a clamping method based on the flexible clamping device for turbine blades, comprising the following steps:

[0017] Step 1: Place the turbine blade flat on the plurality of support pistons, and make one end of the turbine blade located between the upper flexible clamping assembly, the lower flexible clamping assembly and the two side flexible clamping assemblies on the first turntable;

[0018] Step 2: Start the first rotating drive component to drive the first turntable to rotate, so that the flexible clamping mechanism on the first turntable rotates synchronously, so that the upper flexible clamping assembly, the lower flexible clamping assembly and the two side flexible clamping assemblies on the first turntable are in positions adapted to the shape of one end of the turbine blade;

[0019] Step 3: supplying air to the lower base and the two side bases on the first turntable through the air charging and discharging device, lifting one end of the turbine blade to a certain height through the multiple lower pistons, and the side pistons on the two side bases clamp the left and right sides of the turbine blade, so that the upper part of one end of the turbine blade pushes the multiple upper pistons upward, and the air charging and discharging device supplies air to the upper base on the first turntable, thereby completing the clamping of one end of the turbine blade;

[0020] Step 4: driving the flexible clamping mechanism on the second turntable by the linear telescopic driving component so that the other end of the turbine blade is located between the upper flexible clamping assembly, the lower flexible clamping assembly and the two side flexible clamping assemblies on the second turntable;

[0021] Step 5: Start the second rotating drive component to drive the second turntable to rotate, so that the flexible clamping mechanism on the second turntable rotates synchronously, so that the upper flexible clamping assembly, the lower flexible clamping assembly and the two side flexible clamping assemblies on the second turntable are in a position adapted to the shape of the other end of the turbine blade;

[0022] Step 6: supplying air to the lower base and the two side bases on the second turntable through the air charging and discharging device, lifting the other end of the turbine blade to a certain height through the multiple lower pistons, and the side pistons on the two side bases clamp the left and right sides of the turbine blade, so that the upper part of the other end of the turbine blade pushes the multiple upper pistons upward, and the air charging and discharging device supplies air to the upper base on the second turntable, thereby completing the clamping of the other end of the turbine blade;

[0023] Step seven: supplying air to the bottom base through the air charging and discharging device so that the plurality of supporting pistons are in contact with the lower portion of the turbine blade, thereby completing the clamping of the turbine blade.

[0024] Compared with the prior art, the present invention has achieved the following technical effects:

[0025] The bottom flexible support mechanism of the flexible clamping device for turbine blades of the present invention includes a bottom base and a plurality of support pistons slidably mounted on the upper part of the bottom base, the bottom base is used to connect with the inflation and deflation device; the flexible clamping mechanism includes a mounting bracket, an upper flexible clamping assembly, a lower flexible clamping assembly and two side flexible clamping assemblies, the upper base, the lower base and the two side bases are all used to connect with the inflation and deflation device. The bottom flexible support mechanism, the upper flexible clamping assembly, the lower flexible clamping assembly and the side flexible clamping assembly are all pneumatically driven, and the plurality of support pistons, the plurality of upper pistons, the plurality of lower pistons and the plurality of side pistons uniformly apply a flexible clamping force to the turbine blades, effectively controlling the deformation generated during the machining of the turbine blades, solving the problems of large machining deformation and difficulty in ensuring the machining surface quality caused by weak rigidity during the milling of the turbine blades, and being applicable to turbine blades with different structures, thus improving the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of the flexible clamping device for turbine blades provided by the present invention;

[0028] Figure 2 A schematic structural diagram of a positioning mechanism in a flexible clamping device for turbine blades provided by the present invention and a flexible clamping mechanism installed on a first turntable;

[0029] Figure 3 A schematic diagram of the structure of a linear telescopic drive component and a flexible clamping mechanism installed on a second turntable in the flexible clamping device for turbine blades provided by the present invention;

[0030] Figure 4 A schematic diagram of the structure of the bottom flexible support mechanism in the flexible clamping device for turbine blades provided by the present invention;

[0031] Figure 5 A cross-sectional view of a bottom flexible support mechanism in a flexible clamping device for turbine blades provided by the present invention;

[0032] Figure 6 A schematic diagram of the structure of an upper flexible clamping assembly in a flexible clamping device for turbine blades provided by the present invention;

[0033] Figure 7 A cross-sectional view of an upper flexible clamping assembly in a flexible clamping device for turbine blades provided by the present invention.

[0034] Description of reference numerals: 100, flexible clamping device for turbine blades; 1, first support platform; 2, first mounting platform; 3, first rotating drive component; 4, first circular plate; 5, first turntable; 6, second support platform; 7, second mounting platform; 8, second rotating drive component; 9, second circular plate; 10, second turntable; 11, bottom flexible support mechanism; 111, bottom base; 112, cylindrical groove; 113, flow channel; 114, first air hole; 115, connecting hole; 116, annular buffer gasket; 117. Bottom block; 118. Connecting rod; 119. Top pin; 12. Mounting bracket; 13. Upper base; 14. Upper piston; 141. Upper cylinder; 142. Upper limit plate; 15. Second air hole; 16. Lower base; 17. Lower piston; 18. Side base; 19. Side piston; 20. Linear telescopic drive component; 21. Slide rail; 22. Slider; 23. Bottom plate; 24. Top plate; 25. Positioning plate; 26. Rotating shaft; 27. Stud; 28. Positioning nut; 200. Turbine blade. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The purpose of the present invention is to provide a flexible clamping device and clamping method for turbine blades, which effectively control the deformation generated during the processing of turbine blades and improve the scope of application.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] like Figure 1-Figure 7 As shown, this embodiment provides a flexible clamping device 100 for turbine blades, including a first workbench, a first rotation drive component 3, a first turntable 5, a second workbench, a second rotation drive component 8, a second turntable 10, a linear telescopic drive component 20, a bottom flexible support mechanism 11 and two flexible clamping mechanisms, the second workbench is arranged on one side of the first workbench, and the first workbench and the second workbench are arranged symmetrically, and there is a gap between the first workbench and the second workbench. The first rotation drive component 3 is arranged on the first workbench and is used to drive the first turntable 5 to rotate in a horizontal direction, the second rotation drive component 8 is arranged on the second workbench and is used to drive the second turntable 10 to rotate in a horizontal direction, and the central axis around which the first turntable 5 rotates is arranged in a colinear manner with the central axis around which the second turntable 10 rotates.

[0039] The bottom flexible support mechanism 11 is arranged between the first workbench and the second workbench. The bottom flexible support mechanism 11 includes a bottom base 111 and a plurality of support pistons slidably installed on the upper part of the bottom base 111. The bottom base 111 is supported by the first workbench and the second workbench. The bottom base 111 is used to connect with the inflation and deflation device, so that the support piston can slide relative to the bottom base 111; a flexible clamping mechanism is fixed on the first turntable 5, and the other flexible clamping mechanism is slidably installed on the second turntable 10. The linear telescopic drive component 20 is used to drive the other flexible clamping mechanism to move toward or away from the flexible clamping mechanism on the first turntable 5.

[0040] The flexible clamping mechanism includes a mounting bracket 12, an upper flexible clamping assembly, a lower flexible clamping assembly and two side flexible clamping assemblies. The upper flexible clamping assembly includes an upper base 13 and a plurality of upper pistons 14 slidably mounted on the lower part of the upper base 13. The upper base 13 is arranged at the upper part of the mounting bracket 12 and is used to connect with the inflation and deflation device, so that the upper piston 14 can slide relative to the upper base 13; the lower flexible clamping assembly includes a lower base 16 and a plurality of lower pistons 17 slidably mounted on the upper part of the lower base 16. The lower base 16 is arranged at the lower part of the mounting bracket 12 and is used to connect with the inflation and deflation device, so that the upper piston 14 can slide relative to the upper base 13. Used to connect with the inflation and deflation device, so that the lower piston 17 can slide relative to the lower base 16; the two side flexible clamping assemblies are symmetrically arranged on both sides of the interior of the mounting bracket 12, and the side flexible clamping assembly includes a side base 18 and a plurality of side pistons 19 slidably installed on one side of the side base 18. The side base 18 is arranged on one side of the interior of the mounting bracket 12 and is used to connect with the inflation and deflation device, so that the side piston 19 can slide relative to the side base 18. The side piston 19 of each side flexible clamping assembly is arranged on a side close to another side flexible clamping assembly.

[0041] The first workbench in this embodiment includes a first support platform 1 and a first mounting platform 2 arranged at one end of the first support platform 1 away from the second workbench, the first mounting platform 2 is vertically arranged, the first rotation driving component 3 is a first rotation motor, the first rotation motor is arranged on the side of the first mounting platform 2 close to the second workbench, a first circular plate 4 is fixedly sleeved on the power output shaft of the first rotation motor, the first turntable 5 is fixed to the lower part of the first circular plate 4 close to the second workbench, a first arc groove is arranged on the upper part of the first support platform 1, and the bottom of the first turntable 5 is an arc structure matching the first arc groove structure, the central axis of the power output shaft of the first rotation motor, the central axis of the first circular plate 4 and the central axis of the arc structure at the bottom of the first turntable 5 are colinearly arranged, so that the first support platform 1 supports the first turntable 5 when it rotates, so that the first turntable 5 can rotate stably.

[0042] The second workbench in this embodiment includes a second support platform 6 and a second mounting platform 7 arranged at one end of the second support platform 6 away from the first workbench, the second mounting platform 7 is vertically arranged, the second rotation driving component 8 is a second rotation motor, and the second rotation motor is arranged on the side of the second mounting platform 7 close to the first workbench, a second circular plate 9 is fixedly sleeved on the power output shaft of the second rotation motor, and the second turntable 10 is fixed to the lower part of the second circular plate 9 close to the first workbench, a second arc groove is arranged on the upper part of the second support platform 6, and the bottom of the second turntable 10 is an arc structure matching the second arc groove structure, the central axis of the power output shaft of the second rotation motor, the central axis of the second circular plate 9 and the central axis of the arc structure at the bottom of the second turntable 10 are colinearly arranged, so that the second support platform 6 supports the second turntable 10 when it rotates, so that the second turntable 10 can rotate stably.

[0043] Specifically, the linear telescopic driving component 20 is arranged on the second circular plate 9 and is located above the second turntable 10, and the telescopic end of the linear telescopic driving component 20 is connected to the mounting bracket 12 of the flexible clamping mechanism on the second turntable 10. The linear telescopic driving component 20 in this embodiment is an electric push rod, a cylinder or a hydraulic cylinder.

[0044] In order to achieve stable sliding installation of another flexible clamping mechanism, a plurality of parallel slide rails 21 are arranged on the upper part of the second turntable 10, and a plurality of sliders 22 are arranged on the lower part of the mounting bracket 12 of the flexible clamping mechanism installed on the second turntable 10, and each slider 22 is slidably installed on a slide rail 21.

[0045] In this specific embodiment, two slide rails 21 are disposed on the second turntable 10 , and two sliding blocks 22 are disposed at the lower portion of the mounting bracket 12 of the flexible clamping mechanism mounted on the second turntable 10 .

[0046] like Figure 3 As shown, the mounting bracket 12 of the flexible clamping mechanism installed on the first turntable 5 is fixed to one end of the first turntable 5 close to the second turntable 10, and a positioning mechanism is provided on the first turntable 5, and the positioning mechanism is located on the side of the mounting bracket 12 on the first turntable 5 away from the second turntable 10. The positioning mechanism includes a bottom plate 23, a top plate 24, a positioning plate 25, a rotating shaft 26, a stud 27 and a positioning nut 28. One end of the top plate 24 close to the second turntable 10 is connected to the top of the mounting bracket 12 on the first turntable 5, one end of the bottom plate 23 close to the second turntable 10 is connected to the bottom of the mounting bracket 12 on the first turntable 5, the lower part of the bottom plate 23 is connected to the first turntable 5, the stud 27 and the rotating shaft 26 are respectively fixed to the top and bottom of the positioning plate 25, the rotating shaft 26 is rotatably mounted on the bottom plate 23 through a bearing, the stud 27 passes through the top plate 24 and extends to the top, and the positioning nut 28 is installed on the stud 27 and is located above the top plate 24.

[0047] When the positioning nut 28 is tightened on the top plate 24, the position of the positioning plate 25 can be locked. When the position of the positioning plate 25 needs to be adjusted, the positioning nut 28 is screwed outward to allow the stud 27 to rotate, thereby rotating the positioning plate 25 to the desired position, and then re-tightening the positioning nut 28. In this embodiment, the positioning mechanism is provided to further ensure the accuracy of the clamping and positioning.

[0048] like Figure 5 As shown, a plurality of cylindrical grooves 112 are arranged on the upper part of the bottom substrate 111, and a flow channel 113 is arranged on the lower part of the bottom substrate 111. The flow channel 113 in this example is arranged horizontally and perpendicular to the cylindrical groove 112. One end of the flow channel 113 passes through one side of the bottom substrate 111 to form a first air hole 114, and the first air hole 114 is used to connect with the gas charging and discharging device. The bottom of each cylindrical groove 112 is connected to the flow channel 113 through a connecting hole 115. An annular buffer gasket 116 is fixed to the bottom of each cylindrical groove 112. A supporting piston is slidably arranged in each cylindrical groove 112. An annular sealing layer is arranged on the inner wall of the cylindrical groove, and the supporting piston fits the annular sealing layer. The annular buffer gasket 116 is arranged to buffer the supporting piston when it falls back to reduce the impact.

[0049] In this specific embodiment, a plurality of support pistons are arranged in a matrix array, and the top of the support piston is a spherical structure. The annular buffer gasket 116 is made of rubber.

[0050] Specifically, the supporting piston includes a top pin 119, a connecting rod 118 and a bottom block 117 connected in sequence from top to bottom, and the bottom block 117 and the top pin 119 are both in contact with the annular sealing layer and can move up and down along the cylindrical groove 112. In this embodiment, the cylindrical groove 112 is a cylindrical groove, the bottom block 117 is a circular block, and the top pin 119 is a cylinder with a spherical structure at the top.

[0051] When the bottom flexible support mechanism 11 is working, gas is introduced through the first air hole 114, and the gas flows into the bottom of the support piston through the flow channel 113, and the support piston starts to move upward to achieve the effect of lifting the ejector pin 119 upward. When the ejector pin 119 contacts the turbine blade 200, the gas stops entering, and the ejector pin 119 remains in the state of contacting the turbine blade 200. After the processing is completed, the ejector pin 119 needs to be restored to the initial state, and the gas only needs to be discharged from the first air hole 114. When the ejector pin 119 is reset, the bottom block 117 contacts the annular buffer gasket 116 to reduce the impact.

[0052] like Figure 6 and Figure 7As shown, the upper base 13 is a hollow structure, the top of the upper base 13 is fixed to the upper part of the mounting bracket 12, and a plurality of upper mounting holes are arranged at the bottom of the upper base 13. The upper piston 14 includes an upper cylinder 141 and an upper limit plate 142 arranged at the top of the upper cylinder 141. The upper cylinder 141 is slidably installed in the upper mounting hole, and a first sealing ring is arranged on the inner wall of the upper mounting hole. The upper cylinder 141 fits with the first sealing ring. The upper limit plate 142 is located in the upper base 13 and is used to limit the upper cylinder 141 to prevent the upper cylinder 141 from detaching from the upper base 13. A second air hole 15 is arranged on one side of the upper base 13, and the second air hole 15 is used to be connected with the inflation and deflation device.

[0053] In this specific embodiment, a plurality of upper pistons 14 are arranged in a matrix array. The upper cylinder 141 is a cylinder, the upper limit plate 142 is a circular plate, the upper mounting hole is a circular hole, and the diameter of the upper limit plate 142 is larger than the diameter of the upper mounting hole.

[0054] The lower base 16 is a hollow structure, the top of the lower base 16 is fixed to the lower part of the mounting bracket 12, a plurality of lower mounting holes are arranged on the top of the lower base 16, the lower piston 17 comprises a lower cylinder and a lower limit plate arranged at the bottom of the lower cylinder, the lower cylinder is slidably installed in the lower mounting hole, a second sealing ring is arranged on the inner wall of the lower mounting hole, the lower cylinder is fitted with the second sealing ring, the lower limit plate is located in the lower base 16 and is used to limit the lower cylinder to prevent the lower cylinder from detaching from the lower base 16, a third air hole is arranged on one side of the lower base 16, and the third air hole is used to connect with the inflation and deflation device.

[0055] In this specific embodiment, a plurality of lower pistons 17 are arranged in a matrix array. The lower cylinder is a cylinder, the lower limit plate is a circular plate, the lower mounting hole is a circular hole, and the diameter of the lower limit plate is larger than the diameter of the lower mounting hole.

[0056] The side base 18 is a hollow structure, and a plurality of side mounting holes are provided on one side of the side base 18. The other side of the side base 18 is fixed to the inner side of the mounting bracket 12. The side piston 19 includes a side column and a side limit plate provided on one side of the side column. The side column is slidably installed in the side mounting hole. A third sealing ring is provided on the inner wall of the side mounting hole. The side column fits with the third sealing ring. The side limit plate is located in the side base 18 and is used to limit the side column to prevent the side column from detaching from the side base 18. A fourth air hole is provided on one side of the side base 18, and the fourth air hole is used to connect with the inflation and deflation device.

[0057] In this specific embodiment, a plurality of side pistons 19 are arranged in a matrix array. The side column is a cylinder, the side limit plate is a circular plate, the side mounting hole is a circular hole, and the diameter of the side limit plate is larger than the diameter of the side mounting hole.

[0058] In this specific implementation, considering the stress and cutting fluid during processing, the rigidity and corrosion resistance need to be maintained, and the support piston, the upper piston 14, the lower piston 17 and the side piston 19 are all made of stainless steel.

[0059] The inflation and deflation device in this embodiment includes an inflation and deflation air pump, a main pipe, a first branch pipe, two second branch pipes, two third branch pipes and four fourth branch pipes. One end of the main pipe is connected to the inflation and deflation air pump. The first air hole 114 is used to connect to the main pipe through the first branch pipe. The first branch pipe is provided with a first valve. Each second air hole 15 is used to connect to the main pipe through a second branch pipe, and each second branch pipe is provided with a second valve. Each third air hole is used to connect to the main pipe through a third branch pipe, and each third branch pipe is provided with a third valve. Each fourth air hole is used to connect to the main pipe through a fourth branch pipe, and each fourth branch pipe is provided with a fourth valve.

[0060] The first valve, the second valve, the third valve and the fourth valve in this embodiment are all electric-manual dual-control valves, that is, they can be controlled to open and close by both electric control and manual control. This embodiment also includes a controller, and the first valve, the second valve, the third valve and the fourth valve are all connected to the controller. During operation, the first valve, the second valve, the third valve and the fourth valve can be opened and closed by the controller according to actual needs. In the non-electrically controlled state, the first valve, the second valve, the third valve and the fourth valve can also be manually operated to open and close.

[0061] This embodiment also provides a clamping method based on the turbine blade flexible clamping device 100, comprising the following steps:

[0062] Step 1: Place the turbine blade 200 flat on a plurality of supporting pistons, and make one end of the turbine blade 200 located between the upper flexible clamping assembly, the lower flexible clamping assembly and the two side flexible clamping assemblies on the first turntable 5. Then, one end of the turbine blade 200 is positioned by the positioning mechanism. Specifically, the positioning plate 25 is first rotated to the desired position and locked by tightening the positioning nut 28, and then one end of the turbine blade 200 is moved to fit with the positioning plate 25, thereby achieving the positioning of the turbine blade 200.

[0063] In step one, after placing the turbine blade 200 on a plurality of supporting pistons, the first valve in the inflation and deflation device can be controlled to open according to actual needs so that the inflation and deflation pump supplies air to the bottom base 111, and then provides support to the turbine blade 200 through a plurality of supporting pistons for subsequent clamping and processing. After the air supply is completed, the first valve is closed.

[0064] Step 2: Start the first rotating drive component 3 to drive the first turntable 5 to rotate, so that the flexible clamping mechanism on the first turntable 5 rotates synchronously, so that the upper flexible clamping assembly, the lower flexible clamping assembly and the two side flexible clamping assemblies on the first turntable 5 are in a position adapted to the shape of one end of the turbine blade 200.

[0065] Step three, control the corresponding third valve and fourth valve in the charging and discharging device to open so that the charging and discharging air pump supplies air to the lower base 16 and the two side bases 18 on the first turntable 5, and lift one end of the turbine blade 200 to a certain height through multiple lower pistons 17. The side pistons 19 on the two side bases 18 clamp the left and right sides of the turbine blade 200, so that the upper part of one end of the turbine blade 200 pushes the multiple upper pistons 14 upward. After the air supply is completed, the corresponding third valve and fourth valve are closed; control the corresponding second valve in the charging and discharging device to open so that the charging and discharging air pump supplies air to the upper base 13 on the first turntable 5, so that the upper piston 14, the lower piston 17 and the side piston 19 are all in contact with one end of the turbine blade 200, thereby completing the clamping of one end of the turbine blade 200, and the corresponding second valve is closed after the air supply is completed.

[0066] Specifically, all the upper pistons 14 of the flexible clamping mechanism on the first turntable 5 naturally droop under the action of gravity. In the process of clamping one end of the turbine blade 200, when multiple lower pistons 17 lift one end of the turbine blade 200 to a certain height, under the influence of the structure of the turbine blade 200, some of the upper pistons 14 will produce an upward displacement. At this time, the corresponding second valve in the inflation and deflation device is controlled to open so that the inflation and deflation air pump supplies air to the upper base 13, so that the upper piston 14, the lower piston 17 and the side piston 19 provide clamping force to one end of the turbine blade 200. After the air supply is completed, the corresponding second valve is closed.

[0067] Step 4: Drive the flexible clamping mechanism on the second turntable 10 through the linear telescopic drive component 20 so that the other end of the turbine blade 200 is located between the upper flexible clamping assembly, the lower flexible clamping assembly and the two side flexible clamping assemblies on the second turntable 10.

[0068] Step five, start the second rotating drive component 8 to drive the second turntable 10 to rotate, so that the flexible clamping mechanism on the second turntable 10 rotates synchronously, so that the upper flexible clamping assembly, the lower flexible clamping assembly and the two side flexible clamping assemblies on the second turntable 10 are in a position adapted to the shape of the other end of the turbine blade 200.

[0069] Step six, control the corresponding third valve and fourth valve in the charging and discharging device to open so that the charging and discharging air pump supplies air to the lower base 16 and the two side bases 18 on the second turntable 10, and lift the other end of the turbine blade 200 to a certain height through multiple lower pistons 17. The side pistons 19 on the two side bases 18 clamp the left and right sides of the turbine blade 200, so that the upper part of the other end of the turbine blade 200 pushes the multiple upper pistons 14 upward. After the air supply is completed, the corresponding third valve and fourth valve are closed; control the corresponding second valve in the charging and discharging device to open so that the charging and discharging air pump supplies air to the upper base 13 on the second turntable 10, so that the upper piston 14, the lower piston 17 and the side piston 19 are all in contact with the other end of the turbine blade 200, thereby completing the clamping of the other end of the turbine blade 200, and the corresponding second valve is closed after the air supply is completed.

[0070] Specifically, all the upper pistons 14 of the flexible clamping mechanism on the second turntable 10 naturally droop under the action of gravity. In the process of clamping the other end of the turbine blade 200, when multiple lower pistons 17 lift the other end of the turbine blade 200 to a certain height, under the influence of the structure of the turbine blade 200, some of the upper pistons 14 will produce an upward displacement. At this time, the corresponding second valve in the inflation and deflation device is controlled to open so that the inflation and deflation air pump supplies air to the upper base 13, so that the upper piston 14, the lower piston 17 and the side piston 19 provide clamping force to the other end of the turbine blade 200. After the air supply is completed, the corresponding second valve is closed.

[0071] Step seven: supply air to the bottom base 111 through the air filling and deflation device, so that the multiple supporting pistons are in contact with the lower part of the turbine blade 200, thereby completing the clamping of the turbine blade 200.

[0072] Specifically, in step seven, based on the initial air supply to the bottom base 111 in step one, the first valve in the air charging and discharging device is controlled to open again so that the air charging and discharging pump continues to supply air to the bottom base 111, so that the tops of multiple supporting pistons are in contact with the lower part of the turbine blades 200, and the first valve is closed after the air supply is completed.

[0073] The bottom flexible support mechanism 11 and two flexible clamping mechanisms in this embodiment realize the clamping of the turbine blade 200. The bottom flexible support mechanism 11, the upper flexible clamping assembly, the lower flexible clamping assembly and the side flexible clamping assembly are all pneumatically driven, which is convenient and quick to operate. Multiple support pistons, multiple upper pistons 14, multiple lower pistons 17 and multiple side pistons 19 evenly apply flexible clamping force to the turbine blade 200, effectively controlling the deformation of the turbine blade 200 during the processing, reducing the flutter during the processing, solving the problems of large processing deformation and difficult to ensure the processing surface quality caused by weak rigidity during the milling process of the turbine blade 200, improving the processing accuracy, and being applicable to turbine blades 200 with different structures, thereby improving the scope of application, solving the problem that the turbine blade 200 is difficult to clamp due to its complex and diverse structure, and is more stable and firm when clamping the turbine blade 200. The turbine blade flexible clamping device 100 has a simple structure, stable structure, strong reliability and versatility, and can be used for processing complex curved surface structures in the aerospace, electric power and other industries, especially for industries with high requirements for stability and reliability such as precision mechanical equipment of aircraft engines, and has very broad prospects for promotion and application.

[0074] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A flexible clamping device for turbine blades, characterized in that: It includes a first workbench, a first rotation drive component, a first turntable, a second workbench, a second rotation drive component, a second turntable, a linear telescopic drive component, a bottom flexible support mechanism and two flexible clamping mechanisms, the second workbench is arranged on one side of the first workbench, the first rotation drive component is arranged on the first workbench, and is used to drive the first turntable to rotate around the horizontal direction, the second rotation drive component is arranged on the second workbench, and is used to drive the second turntable to rotate around the horizontal direction; the bottom flexible support mechanism is arranged between the first workbench and the second workbench, the bottom flexible support mechanism includes a bottom base and a plurality of support pistons slidably mounted on the upper part of the bottom base, and the bottom base is used to be connected to the inflation and deflation device; one of the flexible clamping mechanisms is fixed on the first turntable, and the other flexible clamping mechanism is slidably mounted on the second turntable, and the linear telescopic drive component is used to drive the other flexible clamping mechanism Move in the direction of approaching or moving away from the flexible clamping mechanism on the first turntable; the flexible clamping mechanism includes a mounting bracket, an upper flexible clamping assembly, a lower flexible clamping assembly and two side flexible clamping assemblies, the upper flexible clamping assembly includes an upper base and a plurality of upper pistons slidably mounted on the lower part of the upper base, the upper base is arranged at the upper part of the mounting bracket and is used to connect with the inflation and deflation device, the lower flexible clamping assembly includes a lower base and a plurality of lower pistons slidably mounted on the upper part of the lower base, the lower base is arranged at the lower part of the mounting bracket and is used to connect with the inflation and deflation device, the two side flexible clamping assemblies are symmetrically arranged on both sides of the interior of the mounting bracket, the side flexible clamping assembly includes a side base and a plurality of side pistons slidably mounted on one side of the side base, the side base is arranged on one side of the interior of the mounting bracket and is used to connect with the inflation and deflation device, and the side pistons of each side flexible clamping assembly are arranged on a side close to another side flexible clamping assembly.

2. The flexible clamping device for turbine blades according to claim 1, characterized in that: The first workbench includes a first supporting platform and a first mounting platform arranged at an end of the first supporting platform away from the second workbench, the first rotating driving component is a first rotating motor, the first rotating motor is arranged on a side of the first mounting platform close to the second workbench, a first circular plate is fixedly sleeved on the power output shaft of the first rotating motor, the first turntable is fixed to the lower part of the first circular plate close to the second workbench, a first circular groove is arranged on the upper part of the first supporting platform, the bottom of the first turntable is an arc structure matching the first arc groove structure, and the central axis of the power output shaft of the first rotating motor, the central axis of the first circular plate and the central axis of the arc structure at the bottom of the first turntable are arranged colinearly.

3. The flexible clamping device for turbine blades according to claim 1, characterized in that: The second workbench includes a second supporting platform and a second mounting platform arranged at an end of the second supporting platform away from the first workbench, the second rotating driving component is a second rotating motor, the second rotating motor is arranged on a side of the second mounting platform close to the first workbench, a second circular plate is fixedly sleeved on the power output shaft of the second rotating motor, the second turntable is fixed to the lower part of the second circular plate close to the first workbench, a second arc groove is arranged on the upper part of the second supporting platform, the bottom of the second turntable is an arc structure matching the second arc groove structure, the central axis of the power output shaft of the second rotating motor, the central axis of the second circular plate and the central axis of the arc structure at the bottom of the second turntable are colinearly arranged, the linear telescopic driving component is arranged on the second circular plate and is located above the second turntable, the telescopic end of the linear telescopic driving component is connected to the mounting bracket of the flexible clamping mechanism on the second turntable.

4. The flexible clamping device for turbine blades according to claim 1, characterized in that: A plurality of parallel slide rails are arranged on the upper part of the second turntable, a plurality of sliders are arranged on the lower part of the mounting bracket of the flexible clamping mechanism mounted on the second turntable, and each slider is slidably mounted on one of the slide rails.

5. The flexible clamping device for turbine blades according to claim 1, characterized in that: The mounting bracket of the flexible clamping mechanism installed on the first turntable is fixed to one end of the first turntable close to the second turntable, and a positioning mechanism is provided on the first turntable, and the positioning mechanism includes a bottom plate, a top plate, a positioning plate, a rotating shaft, a stud and a positioning nut. One end of the top plate close to the second turntable is connected to the top of the mounting bracket on the first turntable, and one end of the bottom plate close to the second turntable is connected to the bottom of the mounting bracket on the first turntable, the stud and the rotating shaft are respectively fixed to the top and bottom of the positioning plate, and the rotating shaft is rotatably installed on the bottom plate through a bearing, the stud passes through the top plate and extends to the top, and the positioning nut is installed on the stud and is located above the top plate.

6. The flexible clamping device for turbine blades according to claim 1, characterized in that: A plurality of cylindrical grooves are arranged on the upper part of the bottom substrate, a flow channel is arranged on the lower part of the bottom substrate, one end of the flow channel penetrates through one side of the bottom substrate to form a first air hole, the first air hole is used to connect with the inflation and deflation device, the bottom of each cylindrical groove is connected with the flow channel through a connecting hole, an annular buffer gasket is fixed to the bottom of each cylindrical groove, a supporting piston is slidably arranged in each cylindrical groove, an annular sealing layer is arranged on the inner wall of the cylindrical groove, and the supporting piston is fitted with the annular sealing layer.

7. The flexible clamping device for turbine blades according to claim 1, characterized in that: The upper base is a hollow structure, and a plurality of upper mounting holes are provided at the bottom of the upper base. The upper piston includes an upper cylinder and an upper limit plate provided on the top of the upper cylinder. The upper cylinder is slidably installed in the upper mounting hole. A first sealing ring is provided on the inner wall of the upper mounting hole. The upper cylinder fits with the first sealing ring. The upper limit plate is located in the upper base and is used to limit the upper cylinder. A second air hole is provided on one side of the upper base, and the second air hole is used to connect with the inflation and deflation device.

8. The flexible clamping device for turbine blades according to claim 1, characterized in that: The lower base is a hollow structure, and a plurality of lower mounting holes are arranged on the top of the lower base. The lower piston includes a lower cylinder and a lower limit plate arranged at the bottom of the lower cylinder. The lower cylinder is slidably installed in the lower mounting hole. A second sealing ring is arranged on the inner wall of the lower mounting hole. The lower cylinder fits with the second sealing ring. The lower limit plate is located in the lower base and is used to limit the lower cylinder. A third air hole is arranged on one side of the lower base, and the third air hole is used to connect with the inflation and deflation device.

9. The flexible clamping device for turbine blades according to claim 1, characterized in that: The side base is a hollow structure, and a plurality of side mounting holes are provided on one side of the side base. The side piston includes a side column and a side limiting plate provided on one side of the side column. The side column is slidably installed in the side mounting hole. A third sealing ring is provided on the inner wall of the side mounting hole. The side column fits with the third sealing ring. The side limiting plate is located in the side base and is used to limit the side column. A fourth air hole is provided on one side of the side base, and the fourth air hole is used to be connected to the inflation and deflation device.

10. A clamping method for a turbine blade flexible clamping device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Place the turbine blade flat on the plurality of support pistons, and make one end of the turbine blade located between the upper flexible clamping assembly, the lower flexible clamping assembly and the two side flexible clamping assemblies on the first turntable; Step 2: Start the first rotating drive component to drive the first turntable to rotate, so that the flexible clamping mechanism on the first turntable rotates synchronously, so that the upper flexible clamping assembly, the lower flexible clamping assembly and the two side flexible clamping assemblies on the first turntable are in positions adapted to the shape of one end of the turbine blade; Step 3: supplying air to the lower base and the two side bases on the first turntable through the air charging and discharging device, lifting one end of the turbine blade to a certain height through the multiple lower pistons, and the side pistons on the two side bases clamp the left and right sides of the turbine blade, so that the upper part of one end of the turbine blade pushes the multiple upper pistons upward, and the air charging and discharging device supplies air to the upper base on the first turntable, thereby completing the clamping of one end of the turbine blade; Step 4: driving the flexible clamping mechanism on the second turntable by the linear telescopic driving component so that the other end of the turbine blade is located between the upper flexible clamping assembly, the lower flexible clamping assembly and the two side flexible clamping assemblies on the second turntable; Step 5: Start the second rotating drive component to drive the second turntable to rotate, so that the flexible clamping mechanism on the second turntable rotates synchronously, so that the upper flexible clamping assembly, the lower flexible clamping assembly and the two side flexible clamping assemblies on the second turntable are in a position adapted to the shape of the other end of the turbine blade; Step 6: supplying air to the lower base and the two side bases on the second turntable through the air charging and discharging device, lifting the other end of the turbine blade to a certain height through the multiple lower pistons, and the side pistons on the two side bases clamp the left and right sides of the turbine blade, so that the upper part of the other end of the turbine blade pushes the multiple upper pistons upward, and the air charging and discharging device supplies air to the upper base on the second turntable, thereby completing the clamping of the other end of the turbine blade; Step seven: supplying air to the bottom base through the air charging and discharging device so that the plurality of supporting pistons are in contact with the lower portion of the turbine blade, thereby completing the clamping of the turbine blade.

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