A numerical control milling special device for turbine moving blade root tenon groove of a combustion engine

Abstract

The application discloses a kind of special equipment of numerical control milling of gas turbine turbine moving blade root tenon groove, it is related to gas turbine turbine moving blade root tenon groove processing technical field, including mobile station component and first adjusting frame, the bottom of mobile station component is equipped with first adjusting frame.The special equipment of numerical control milling of gas turbine turbine moving blade root tenon groove, through mobile station component, first adjusting frame, milling component, second adjusting frame and lifting column and other components collaborative work, realize gas turbine turbine moving blade root tenon groove high-precision numerical control milling processing, mobile station component can be flexibly adjusted processing position, ensure accurate positioning;First adjusting frame and second adjusting frame respectively from different dimensions meticulous adjustment milling angle and depth, satisfy complex tenon groove processing demand;Milling component as core execution component, its high-speed rotation and stable cutting guarantee processing surface smoothness and dimensional accuracy;Lifting column enhances equipment adaptability and flexibility, can be adjusted height according to different moving blade model, realize one machine multiuse.

Description

Technical Field

[0001] This invention relates to the field of machining technology for the root tenon groove of gas turbine blades, specifically a special CNC milling equipment for machining the root tenon groove of gas turbine blades. Background Technology

[0002] The blade root tenon groove of a gas turbine is a key structure used to connect the turbine blade and the disk in a gas turbine. Its design directly affects the blade fixing method, stress distribution and thermal management performance.

[0003] Machining the root tenon groove of the turbine blade is a key process in the manufacturing of core components of gas turbines. It is mainly used to machine the tenon groove (or tenon tooth) on the turbine disk to install the turbine blade. Its accuracy directly affects the assembly quality of the blade and the disk and the safety of service.

[0004] Conventional CNC milling equipment for the root tenon groove of gas turbine blades has many limitations in the processing process. Its adjustment system is relatively simple and it is difficult to make detailed adjustments to the milling angle and depth from multiple dimensions. For complex tenon groove structures, traditional equipment is inadequate and cannot meet diverse processing needs. Summary of the Invention

[0005] The purpose of this invention is to provide a special CNC milling machine for the tenon groove of the blade root of a gas turbine, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a special CNC milling equipment for tenon grooves at the root of a gas turbine blade, comprising a movable table component and a first adjusting frame. The first adjusting frame is installed at the bottom of the movable table component, and a milling component is mounted on top of the movable table component. The milling component is connected to two sides of a second adjusting frame, and lifting columns are vertically installed at the four diagonal points at the bottom of the second adjusting frame. The movable table component includes an electromagnetic adsorption table, an electric joint, a rotary seat, and a fixed seat. The electric joint is installed at the bottom of the electromagnetic adsorption table, and a rotary seat is installed at the bottom of the electric joint. A fixed seat is provided at the bottom of the rotary seat.

[0007] Furthermore, the first adjustment frame includes a stabilizer, a transmission screw, a first guide rail, a servo motor, and a second guide rail. The transmission screw is horizontally connected and installed at one bottom end of the stabilizer, and the first guide rail is horizontally installed at the bottom of the transmission screw. The servo motor is connected to one end of the transmission screw, and the second guide rail is horizontally installed at the bottom end of the stabilizer away from the transmission screw.

[0008] Further, the fixing seat is mounted at the middle of the top of the stabilizing frame by adopting a flange structure, the electric joint is mounted at the middle of the bottom of the electromagnetic adsorption table, one end of the stabilizing frame is in mutual connection with the transmission screw rod and the first guide rail through threaded connection and a slotted embedded structure respectively, the other end of the stabilizing frame is in mutual connection with the second guide rail through a slotted embedded structure, the transmission screw rod, the first guide rail and the second guide rail are parallel to each other, and one end of the transmission screw rod is mutually connected and combined with the power output end of the servo motor through a coupling.

[0009] Further, the milling component comprises a stabilizing seat, a milling motor and a milling cutter, the milling motor is connected and mounted on one side of the middle part of the stabilizing seat, and the milling cutter is vertically mounted at the power output end of the bottom of the milling motor through a coupling.

[0010] Further, the second adjusting frame comprises a supporting frame, a butt joint seat, a direct drive motor, a driving screw rod, a first sliding rail, a second sliding rail and a shock absorption support, the butt joint seats are integrally arranged at four opposite corners of the bottom of the supporting frame, the direct drive motor is horizontally mounted at one end of the top of the supporting frame, the power output end of the direct drive motor is horizontally connected with the driving screw rod through a coupling, the first sliding rail is horizontally arranged at the bottom of the driving screw rod, the second sliding rail is horizontally mounted at the top of one end, away from the first sliding rail, of the supporting frame, and the shock absorption support is connected and mounted in the middle of each of the first sliding rail and the second sliding rail.

[0011] Further, the driving screw rod and the first sliding rail are mutually connected with one group of shock absorption supports through threaded connection and a slotted embedded structure respectively, the second sliding rail is mutually connected with the other group of shock absorption supports through a slotted embedded structure, the supporting frame is arranged in a "囗"-shaped structure, the first sliding rail and the second sliding rail are respectively horizontally mounted at two ends of the top of the supporting frame, the shock absorption supports are symmetrically mounted at two ends of the stabilizing seat in a left-right mode, and hole structures for bolt mounting are formed at four opposite corners of the joint between the shock absorption supports and the stabilizing seat.

[0012] Further, the lifting column comprises a hydraulic oil cylinder, an engagement seat and a base, the engagement seat is arranged at the top of the hydraulic oil cylinder, and the base is arranged at the bottom of the hydraulic oil cylinder.

[0013] Further, hole structures for bolt mounting are formed at four opposite corners of the joint between the engagement seat and the butt joint seat, and hole structures for bolt mounting are formed at four opposite corners of the base.

[0014] The present invention provides a special numerical control milling device for a fir tree groove at a blade root of a gas turbine turbine moving blade, which has the following beneficial effects: 1. This invention, through the structural configuration of the moving table component and the complementary structural layout of the first adjusting frame, enables the equipment to flexibly and efficiently adjust the position of the moving table during operation, thereby achieving precise and stable feeding operations. Within the moving table component, a specially designed electromagnetic adsorption table possesses strong adsorption capabilities, firmly adsorbing the blade roots of the gas turbine blades to be processed, ensuring that the blade roots do not shift during milling, thus effectively guaranteeing processing accuracy and consistency. Furthermore, the ingenious arrangement of the electric joint and rotary seat allows the electromagnetic adsorption table to be flexibly adjusted at multiple angles and directions to adapt to the processing requirements of blade root tenons of different shapes and angles, greatly improving the adaptability and versatility of the equipment. Simultaneously, the perfect cooperation between the transmission screw and the high-performance servo motor in the first adjusting frame provides stable and precise linear motion power for the moving table, ensuring the accuracy and stability of the feeding process. Moreover, the careful design of the first and second guide rails further enhances the stability of the moving table's movement, effectively reducing processing errors caused by vibration, thereby improving overall processing quality and efficiency.

[0015] 2. This invention achieves efficient milling of blade root tenons through the close collaboration between the milling component and the second adjusting frame. Specifically, the milling motor powerfully drives the milling cutter to rotate at high speed, thereby performing precise and meticulous cutting of the blade root tenon. Simultaneously, the second adjusting frame, relying on the efficient power output of the direct-drive motor, combined with the precise transmission of the drive screw and the seamless cooperation of the first and second slide rails, enables flexible adjustment of the milling component in both horizontal and vertical directions. This multi-dimensional adjustment capability allows the equipment to easily adapt to the processing requirements of blade root tenons of different depths and widths. Furthermore, the specially designed shock-absorbing bracket effectively absorbs various vibrations generated during processing, further improving the processing efficiency. Stability and precision are paramount, and the ingenious design of the lifting columns gives the equipment the ability to adjust its height within a certain range according to different processing needs. This greatly enhances the equipment's applicability and operational flexibility, ensuring efficient and high-quality processing results under various complex working conditions. In addition, multiple lifting columns are securely connected by bolts to their bases, forming an integrated support structure. This structure not only enhances the overall stability of the equipment but also facilitates overall movement or position adjustment of the equipment when needed. Furthermore, the hydraulic cylinders of each lifting column can achieve synchronous lifting and lowering actions through the control system, ensuring the smoothness and consistency of the milling components when adjusting their height and avoiding processing errors caused by improper height adjustment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main body shaft side view of a special CNC milling equipment for the root tenon groove of a gas turbine blade according to the present invention; Figure 2 This is a schematic diagram of the moving table component structure of a special CNC milling equipment for the root tenon groove of a gas turbine blade according to the present invention; Figure 3 This is a three-dimensional structural diagram of the first adjusting frame of a special CNC milling equipment for the root tenon groove of a gas turbine blade according to the present invention; Figure 4 This is a three-dimensional structural diagram of a milling component of a CNC milling equipment for machining the root tenon groove of a gas turbine blade according to the present invention. Figure 5 This is a three-dimensional structural diagram of the second adjustment frame of a special CNC milling equipment for the root tenon groove of a gas turbine blade according to the present invention; Figure 6 This is a three-dimensional structural diagram of the lifting column of a special CNC milling equipment for the root tenon groove of a gas turbine blade according to the present invention.

[0017] In the diagram: 1. Moving platform component; 101. Electromagnetic adsorption platform; 102. Electric joint; 103. Rotary seat; 104. Fixed seat; 2. First adjusting frame; 201. Stabilizing frame; 202. Transmission screw; 203. First guide rail; 204. Servo motor; 205. Second guide rail; 3. Milling component; 301. Stabilizing seat; 302. Milling motor; 303. Milling cutter; 4. Second adjusting frame; 401. Support frame; 402. Docking seat; 403. Direct drive motor; 404. Drive screw; 405. First slide rail; 406. Second slide rail; 407. Shock absorber bracket; 5. Lifting column; 501. Hydraulic cylinder; 502. Connecting seat; 503. Base. Detailed Implementation

[0018] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0019] like Figures 1 to 6As shown, a CNC milling machine for tenon grooves at the root of a gas turbine blade includes a moving table component 1 and a first adjusting frame 2. The first adjusting frame 2 is installed at the bottom of the moving table component 1, and a milling component 3 is mounted above the moving table component 1. Second adjusting frames 4 are connected to both sides of the milling component 3, and lifting columns 5 are vertically installed at the four diagonal points at the bottom of the second adjusting frame 4. The moving table component 1 includes an electromagnetic adsorption table 101, an electric joint 102, a rotary seat 103, and a fixed seat 104. The electric joint 102 is installed at the bottom of the electromagnetic adsorption table 101, and the rotary seat 103 is installed at the bottom of the electric joint 102. Furthermore, a fixed seat 104 is provided at the bottom of the rotary seat 103. The first adjusting frame 2 includes a stabilizing frame 201, a transmission screw 202, a first guide rail 203, a servo motor 204, and a second guide rail 205. The transmission screw 202 is horizontally connected and installed at one end of the bottom of the stabilizing frame 201, and the first guide rail 203 is horizontally provided at the bottom of the transmission screw 202. The servo motor 204 is connected to one end of the transmission screw 202, and the second guide rail 205 is horizontally installed at the bottom of the stabilizing frame 201 away from the transmission screw 202. The fixed seat 104 is installed in the middle of the top of the stabilizing frame 201 using a flange structure, and the electric joint 102... Mounted at the bottom center of the electromagnetic adsorption platform 101, the stabilizer 201 has one end connected to the transmission screw 202 and the first guide rail 203 via threaded connection and slotted embedded structure, respectively. The other end of the stabilizer 201 is connected to the second guide rail 205 via a slotted embedded structure. The transmission screw 202, the first guide rail 203, and the second guide rail 205 are parallel to each other. One end of the transmission screw 202 is connected to the power output end of the servo motor 204 via a coupling. The precise control of the servo motor 204 enables the transmission screw 202 to rotate stably and accurately. This, in turn, drives the stabilizer 201 to move linearly along the first guide rail 203 and the second guide rail 205. This design ensures the moving accuracy and stability of the moving table component 1 in the horizontal direction, providing a reliable feeding basis for subsequent milling. At the same time, the flexible rotation of the electric joint 102 and the multi-angle adjustment function of the rotary seat 103 enable the electromagnetic adsorption table 101 to make precise angle and position adjustments according to different processing requirements. This design not only improves the processing accuracy of the equipment, but also greatly enhances the adaptability and versatility of the equipment, and can meet the processing requirements of the root tenon groove of various complex-shaped gas turbine blades.

[0020] like Figures 1 to 6As shown, the milling component 3 includes a stabilizing seat 301, a milling motor 302, and a milling cutter 303. The milling motor 302 is connected and installed on one side of the middle part of the stabilizing seat 301, and the milling cutter 303 is vertically installed at the bottom power output end of the milling motor 302 via a coupling. The second adjusting frame 4 includes a support frame 401, a docking seat 402, a direct drive motor 403, a drive screw 404, a first slide rail 405, a second slide rail 406, and a shock-absorbing bracket 407. The docking seat 402 is integrally provided at each of the four diagonal corners of the bottom of the support frame 401, and the direct drive motor 403 is horizontally installed at one end of the top of the support frame 401. The power output end of the direct drive motor 403 is horizontally connected to the drive screw 404 via a coupling, and the bottom of the drive screw 404... A first slide rail 405 is horizontally installed on the support frame 401, while a second slide rail 406 is horizontally installed on the top of the end of the support frame 401 away from the first slide rail 405. Both the first slide rail 405 and the second slide rail 406 are connected to and installed with shock-absorbing brackets 407 in the middle. The drive screw 404, the first slide rail 405, and a set of shock-absorbing brackets 407 are interconnected by threaded connections and slotted embedded structures, respectively. The second slide rail 406 is also interconnected with another set of shock-absorbing brackets 407 by a slotted embedded structure. The support frame 401 has a "U"-shaped structure, with the first slide rail 405 and the second slide rail 406 horizontally installed at both ends of the top of the support frame 401. The shock-absorbing brackets 407 are symmetrically installed at both ends of the stabilizer 301, and four pairs of... Holes for bolt installation are provided at each corner. The lifting column 5 includes a hydraulic cylinder 501, a connecting seat 502, and a base 503. The connecting seat 502 is provided on the top of the hydraulic cylinder 501, and the base 503 is provided on the bottom of the hydraulic cylinder 501. Holes for bolt installation are provided at the four opposite corners of the connection between the connecting seat 502 and the mating seat 402. Holes for bolt installation are also provided at the four opposite corners of the base 503. The milling motor 302 is started to drive the milling cutter 303 to rotate at high speed. At this time, the moving table component 1, driven by the first adjusting frame 2, accurately transports the blade root of the gas turbine to be processed to the area below the milling cutter 303. The milling cutter 303 then precisely cuts the tenon groove of the blade root. During the cutting process, the direct drive motor 403 starts working, and through the precise transmission of the drive screw 404, it drives the milling component 3 to flexibly adjust horizontally and vertically along the first slide rail 405 and the second slide rail 406. This multi-dimensional adjustment capability allows the milling tool 303 to make precise position adjustments according to the processing requirements of blade root tenon grooves of different depths and widths, ensuring the accuracy and consistency of cutting. At the same time, the vibration damping bracket 407 effectively absorbs the vibration generated during the processing, reducing the processing error caused by vibration, and further improving the stability and accuracy of the processing. In addition, the hydraulic cylinder 501 of the lifting column 5 adjusts the height according to the actual processing requirements and is firmly connected to the docking seat 402 of the second adjusting frame 4 through the connecting seat 502.This allows the entire device to be flexibly adjusted in height within a certain range.

[0021] In summary, as Figures 1 to 6 As shown, the CNC milling equipment for the tenon groove of the turbine blade root of the gas turbine is used by first placing the blade root to be processed on the electromagnetic adsorption table 101. The strong adsorption capacity of the electromagnetic adsorption table 101 is used to firmly fix the blade root and prevent it from shifting during the milling process, thus ensuring the accuracy and consistency of the processing. Then, according to the shape and angle requirements of the blade root tenon groove, the electromagnetic adsorption table 101 drives the blade root to make precise adjustments in multiple angles and directions through the flexible adjustment of the electric joint 102 and the rotary seat 103 to meet different processing requirements. Subsequently, the servo motor 204 is started, and through the precise rotation of the transmission screw 202, the stabilizer 201 is driven to move linearly along the first guide rail 203 and the second guide rail 205, accurately transporting the moving table component 1 to the milling position, preparing for subsequent milling processing. During the milling process, the milling motor 302 is started, driving the milling cutter 303 to rotate at high speed, and precisely cutting the blade root tenon groove. At the same time, the direct drive motor 403 starts to work, and through the precise transmission of the drive screw 404, it drives the milling component 3 to make flexible adjustments in the horizontal and vertical directions along the first slide rail 405 and the second slide rail 406, so that the milling cutter 303 can make precise position adjustments according to the processing requirements of leaf root tenon grooves of different depths and widths, ensuring the accuracy and consistency of cutting. In addition, the shock-absorbing bracket 407 effectively absorbs the vibration generated during the processing, reduces the processing error caused by vibration, and further improves the stability and accuracy of the processing. If it is necessary to adjust the height of the equipment to adapt to different processing needs, the height can be adjusted by the hydraulic cylinder 501 of the lifting column 5. The connecting seat 502 is firmly connected to the docking seat 402 of the second adjusting frame 4, so that the entire equipment can be flexibly adjusted in height within a certain range, ensuring that efficient and high-quality processing results can be maintained under various complex working conditions.

[0022] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A special CNC milling machine for tenon grooves at the root of a gas turbine blade, comprising a moving table component (1) and a first adjusting frame (2), characterized in that: The bottom of the moving platform component (1) is equipped with a first adjustment frame (2), and a milling component (3) is mounted on the top of the moving platform component (1). The two sides of the milling component (3) are connected to a second adjustment frame (4), and lifting columns (5) are vertically installed at the four diagonal corners of the bottom of the second adjustment frame (4). The moving platform component (1) includes an electromagnetic adsorption platform (101), an electric joint (102), a rotary seat (103), and a fixed seat (104). The bottom of the electromagnetic adsorption platform (101) is equipped with an electric joint (102), and the bottom of the electric joint (102) is equipped with a rotary seat (103). The bottom of the rotary seat (103) is equipped with a fixed seat (104).

2. The CNC milling equipment for the root tenon groove of a gas turbine blade according to claim 1, characterized in that, The first adjustment frame (2) includes a stabilizer (201), a transmission screw (202), a first guide rail (203), a servo motor (204), and a second guide rail (205). The transmission screw (202) is horizontally connected to one end of the stabilizer (201), and the first guide rail (203) is horizontally arranged at the bottom of the transmission screw (202). The servo motor (204) is connected to one end of the transmission screw (202), and the second guide rail (205) is horizontally installed at the bottom of the stabilizer (201) away from the transmission screw (202).

3. The CNC milling equipment for the root tenon groove of a gas turbine blade according to claim 2, characterized in that, The fixed base (104) is installed in the middle of the top of the stabilizer (201) using a flange structure, and the electric joint (102) is installed in the middle of the bottom of the electromagnetic adsorption platform (101). One end of the stabilizer (201) is connected to the transmission screw (202) and the first guide rail (203) respectively by threaded connection and slotted embedded structure. The other end of the stabilizer (201) is connected to the second guide rail (205) by slotted embedded structure. The transmission screw (202), the first guide rail (203) and the second guide rail (205) are parallel to each other. One end of the transmission screw (202) is connected to the power output end of the servo motor (204) through a coupling.

4. The CNC milling equipment for the root tenon groove of a gas turbine blade according to claim 1, characterized in that, The milling component (3) includes a stabilizer (301), a milling motor (302), and a milling cutter (303). The milling motor (302) is connected and installed on one side of the middle part of the stabilizer (301), and the milling cutter (303) is vertically installed at the bottom power output end of the milling motor (302) through a coupling.

5. A special CNC milling machine for the root tenon groove of a gas turbine blade according to claim 4, characterized in that, The second adjusting frame (4) comprises a support frame (401), an abutting seat (402), a direct-drive motor (403), a driving screw (404), a first slide rail (405), a second slide rail (406) and a shock-absorbing support (407), wherein abutting seats (402) are integrally arranged at four diagonal positions of the bottom of the support frame (401), a direct-drive motor (403) is horizontally mounted at one end of the top of the support frame (401), a power output end of the direct-drive motor (403) is horizontally connected with a driving screw (404) through a coupling, a first slide rail (405) is horizontally arranged at the bottom of the driving screw (404), a second slide rail (406) is horizontally mounted at the top of one end, away from the first slide rail (405), of the support frame (401), and shock-absorbing supports (407) are connected and mounted in middle portions of the first slide rail (405) and the second slide rail (406).

6. A special CNC milling machine for the root tenon groove of a gas turbine blade according to claim 5, characterized in that, The driving screw (404), the first slide rail (405) and one group of shock-absorbing supports (407) are connected with each other through threaded connection and a slotted embedded structure respectively, the second slide rail (406) and the other group of shock-absorbing supports (407) are connected with each other through a slotted embedded structure, the support frame (401) is arranged in a square-frame shaped structure, and the first slide rail (405) and the second slide rail (406) are horizontally mounted at two ends of the top of the support frame (401) respectively.

7. A special CNC milling machine for the root tenon groove of a gas turbine blade according to claim 6, characterized in that, The shock-absorbing supports (407) are symmetrically mounted at two ends of the stabilizing seat (301) in a left-right manner, and hole structures for bolt mounting are formed at four diagonal positions of a joint between the shock-absorbing supports and the stabilizing seat (301).

8. A special CNC milling machine for the root tenon groove of a gas turbine blade according to claim 5, characterized in that, The lifting column (5) comprises a hydraulic oil cylinder (501), a connecting seat (502) and a base (503), wherein the connecting seat (502) is arranged at the top of the hydraulic oil cylinder (501), and the base (503) is arranged at the bottom of the hydraulic oil cylinder (501).

9. A special CNC milling machine for the root tenon groove of a gas turbine blade according to claim 8, characterized in that, Hole structures for bolt mounting are formed at four diagonal positions of a joint between the connecting seat (502) and the abutting seat (402), and hole structures for bolt mounting are formed at four diagonal positions of the base (503).

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