Automatic frequency measurement system for aero-engine blade

Abstract

The invention relates to the technical field of aero-engine blade frequency measurement, and particularly discloses an aero-engine blade automatic frequency measurement system, which comprises a first excitation table, a second excitation table, a detection manipulator, a feeding manipulator, an inverted visual frame, a blade material frame and an automatic tightening device, the detection manipulator is arranged on one side of the first vibration excitation table or the second vibration excitation table, and a frequency measurement instrument is arranged on the detection manipulator; the feeding manipulator is arranged on one side of the blade rack, and a blade clamping jaw and a two-dimensional visual camera are arranged on the feeding manipulator; the two sets of automatic tightening devices are arranged on one side of the first shock excitation table and one side of the second shock excitation table respectively. The inverted visual frame is arranged on one side of the blade material frame, and a three-dimensional visual camera is arranged on the inverted visual frame.

Description

Technical Field

[0001] The present application relates to the technical field of frequency measurement of aircraft engine blades, and in particular to an automatic frequency measurement system for aircraft engine blades. Background Art

[0002] Frequency measurement of aircraft engine blades is one of the most important links in the repair and manufacturing process of engine blades. Its inherent frequency distribution characteristics and quality directly affect the reliability of blade operation and the stable working margin of the engine. However, for many years, blade frequency measurement still relies on traditional pure manual work, which has major drawbacks. First, the entire measurement process is manual work, which is labor-intensive and inefficient; second, there are many human interference factors in the measurement process, including blade clamping, loading and unloading, and manual operation of industrial computers for frequency scanning and data recording, resulting in poor consistency of process quality; third, the noise control effect generated during the measurement process is poor, and the risk of occupational diseases is high. Summary of the invention

[0003] The purpose of the present application is to provide an automatic frequency measurement system for aircraft engine blades, so as to solve the problems in the prior art that blade frequency measurement relies on traditional pure manual work, which has high labor intensity and low working efficiency, and has large human interference factors in the measurement process, resulting in poor consistency of process quality, poor noise control effect generated during the measurement process, and high risk of occupational diseases.

[0004] To achieve the above-mentioned purpose, the embodiment of the present application provides an automatic frequency measurement system for aircraft engine blades, including: a first excitation platform, a second excitation platform, a detection manipulator, a loading manipulator, a flip-up visual frame, a blade material frame, and an automatic tightening device, wherein:

[0005] The detection manipulator is arranged on one side of the first excitation platform or the second excitation platform, and a frequency measuring instrument is arranged on the detection manipulator;

[0006] The feeding manipulator is arranged on one side of the blade material rack, and is provided with a blade gripper and a two-dimensional visual camera;

[0007] There are two sets of automatic tightening devices, which are respectively arranged on one side of the first excitation platform and the second excitation platform;

[0008] The inverted vision frame is arranged at one side of the blade material rack, and a three-dimensional vision camera is arranged on the inverted vision frame.

[0009] Optionally, the automatic tightening device includes a tightening shaft, a first linear guide, a second linear guide, a first cylinder, and a second cylinder. The first linear guide is slidably connected to a first slide. The tightening shaft is arranged on the first slide, and the end of the tightening shaft faces the first excitation table or the second excitation table. The second linear guide is provided with a second slide. The first cylinder and the first linear guide are both arranged on the second slide. The output shaft of the first cylinder is parallel to the first linear guide and connected to the first slide. The second cylinder and the second linear guide are arranged on a supporting platform, and the output shaft of the second cylinder is parallel to the second linear guide and connected to the second slide.

[0010] Optionally, it also includes:

[0011] The sound insulation device is annular and surrounds the automatic tightening device, the first vibration table, the second vibration table, the detection robot, the loading robot and the cooling fan.

[0012] Optionally, it also includes:

[0013] An air conditioner is arranged in the sound insulation device.

[0014] Optionally, it also includes:

[0015] A cooling fan is connected to the first vibration table or the second vibration table.

[0016] Optionally, it also includes:

[0017] The control system includes a main controller PLC, which is used for the logic control of the entire system. The measurement process realizes online display of the detection status of the part detection sensor, the status of the fixture, the alarm information, the production product model, the production shift and the output information.

[0018] Optionally, the main controller PLC adopts Siemens S7-200SMART series PLC.

[0019] Optionally, it also includes:

[0020] The software system control interface includes a principle display panel, a control panel, a data display panel and a channel verification panel.

[0021] Optionally, the detection manipulator adopts an ABB IRB1200 robot to complete the blade frequency measurement work;

[0022] The loading and unloading manipulator is an ABB IRB2400 industrial robot, which is used for loading and unloading of blades.

[0023] Optionally, the first excitation table is controlled by a first excitation controller, and the second excitation table is controlled by a second excitation controller.

[0024] The embodiments of the present application have the following advantages:

[0025] Compared with the prior art, the automatic frequency measurement system for aircraft engine blades provided by the above technical solution integrates the traditional blade frequency measurement process through mechanization, automation and information technology, and designs the vibration system, visual inspection system, mechanical motion structure, sound insulation device, control system, automatic tightening device, and data acquisition system to achieve high-quality and high-efficiency automatic measurement of blade frequency. This method is mainly used for the measurement of the natural frequency of aircraft engine blades. This solves the problem that the blade frequency measurement in the prior art relies on traditional pure manual work, which has high labor intensity and low operation efficiency, and has a large number of human interference factors in the measurement process, resulting in poor consistency of process quality, poor noise control effect generated during the measurement process, and high risk of occupational diseases.

[0026] In addition, the automatic tightening device is mainly used to tighten the bolts used to lock the blades on the test fixture with constant torque. The relative positions of the two tightening bolts of the three test fixtures are designed to be consistent, and a tightening shaft is installed on two linear guides to achieve movement along the line connecting the two tightening bolts and in the vertical direction of the line. The power of movement is driven by the cylinder, and the position is guaranteed by the mechanical limit. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0028] Figure 1 A top view of the overall structure of an automatic frequency measurement system for aircraft engine blades provided by at least one embodiment of the present application;

[0029] Figure 2 A three-dimensional schematic diagram of the overall structure of an automatic frequency measurement system for aircraft engine blades provided by at least one embodiment of the present application;

[0030] Figure 3 A partial three-dimensional schematic diagram of the internal structure of a sound insulation device of an automatic frequency measurement system for aircraft engine blades provided by at least one embodiment of the present application;

[0031] Figure 4 A three-dimensional schematic diagram of a feeding manipulator of an automatic frequency measurement system for aircraft engine blades provided by at least one embodiment of the present application;

[0032] Figure 5 A three-dimensional schematic diagram of a detection manipulator of an automatic frequency measurement system for an aircraft engine blade provided by at least one embodiment of the present application;

[0033] Figure 6 A three-dimensional schematic diagram of an automatic tightening device of an automatic frequency measurement system for aircraft engine blades provided in at least one embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1. The first vibration table, 2. The second vibration table, 3. The first vibration controller, 4. The second vibration controller, 5. The detection robot, 6. The feeding robot, 7. The blade material rack, 8. The two-dimensional vision camera, 9. The inverted vision rack, 10. The cooling fan, 11. The automatic tightening device, 12. The tightening shaft, 13. The first linear guide, 14. The second linear guide, 15. The first cylinder, 16. The second cylinder, 17. The first slide, 18. The second slide, 19. The sound insulation device, 20. The air conditioner, 21. The support platform, 22. The frequency meter, 23. The blade clamp. DETAILED DESCRIPTION

[0036] The following is a description of the implementation of the present application by specific specific embodiments. People familiar with the technology can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0037] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "set", "install", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0039] The present application embodiment provides an automatic frequency measurement system for aircraft engine blades, referring to Figures 1 to 6 ,include:

[0040] The first excitation platform 1, the second excitation platform 2, the detection robot 5, the feeding robot 6, the inverted visual frame 9, the blade material frame 7, the automatic tightening device 11, wherein:

[0041] The detection manipulator 5 is arranged on one side of the first excitation platform 1 or the second excitation platform 2, and a frequency measuring device 22 is arranged on the detection manipulator 5;

[0042] The feeding robot 6 is arranged on one side of the blade material rack 7, and the feeding robot 6 is provided with a blade clamp 23 and a two-dimensional visual camera 8;

[0043] There are two sets of automatic tightening devices 11, which are respectively arranged on one side of the first excitation platform 1 and the second excitation platform 2;

[0044] The inverted vision frame 9 is arranged at one side of the blade material frame 7 , and a three-dimensional vision camera is provided on the inverted vision frame 9 .

[0045] Specifically, the loading robot 6 uses the blade gripper 23 to take the blade from the blade rack 7. After the blade is loaded, the blade is placed on the first vibration table 1 or the second vibration table 2, and the frequency meter 22 needs to detect the blade. The detection robot 5 cooperates with the vibration device to detect the vibration frequency of the blade using the frequency meter 22, and produces data graphics and uploads them to the computer system. The detection robot 5 needs to take care of two vibration tables at the same time. While the loading robot 6 is loading on one vibration table, it detects the blades on the other vibration table, forming a rotation mode of loading and unloading and measuring the frequency.

[0046] Specifically, the operator places the small trailer with blades on the designated loading position for loading, and the loading robot 6 moves to the top of the blade rack 7. The two-dimensional visual camera 8 set on the loading robot 6 is first used to scan and locate the blade position, and the blade position is corrected, and then the loading robot 6 clamps the blade. The blade is clamped above the inverted visual rack 9, and the tail of the blade is scanned and imaged using 3D vision. The robot automatically corrects the posture according to the scanning results, and finally placed on the first excitation table 1 or the second excitation table 2, waiting for measurement.

[0047] In some embodiments, the detection robot 5 uses an ABB IRB1200 robot to complete the blade frequency measurement work; in some embodiments, the loading and unloading robot uses an ABB IRB2400 industrial robot to load and unload the blades.

[0048] In some embodiments, the first excitation table 1 is controlled by a first excitation controller 3 , and the second excitation table 2 is controlled by a second excitation controller 4 .

[0049] Specifically, two sets of vibration devices are provided, each set of vibration devices includes a vibration platform and a vibration controller, forming a dual vibration system. The dual vibration system can detect the vibration frequency of the blades while the feeding robot 6 is loading the blades, and the detection robot 5 with the frequency meter 22 starts to detect the vibration frequency of the blades, thereby improving the detection efficiency. A tightening device is designed after the blades are clamped to replace the traditional manual tightening method and realize the automatic tightening function.

[0050] In some embodiments, reference Figure 6 The automatic tightening device 11 includes a tightening shaft 12, a first linear guide 13, a second linear guide 14, a first cylinder 15, and a second cylinder 16. The first linear guide 13 is slidably connected with a first slide 17. The tightening shaft 12 is arranged on the first slide 17, and the end of the tightening shaft 12 faces the first excitation table 1 or the second excitation table 2. The second linear guide 14 is provided with a second slide 18. The first cylinder 15 and the first linear guide 13 are both arranged on the second slide 18. The output shaft of the first cylinder 15 is parallel to the first linear guide 13 and connected to the first slide 17. The second cylinder 16 and the second linear guide 14 are arranged on the supporting platform 21. The output shaft of the second cylinder 16 is parallel to the second linear guide 14 and connected to the second slide 18.

[0051] Specifically, the automatic tightening device 11 is mainly used to tighten the bolts used to lock the blades on the test fixture with constant torque. The relative positions of the two tightening bolts of the three test fixtures are designed to be consistent, and a tightening shaft 12 is installed on two linear guides to achieve movement along the line connecting the two tightening bolts and in the vertical direction of the line. The power of movement is driven by the cylinder, and the position is guaranteed by the mechanical limit.

[0052] In some embodiments, reference Figure 2 , and also includes: a sound insulation device 19, which is annular and surrounds the automatic tightening device 11, the first excitation table 1, the second excitation table 2, the detection robot 5, the feeding robot 6 and the cooling fan 10.

[0053] Specifically, during the measurement process, the peak frequency can reach 5000Hz, and the persistent high-frequency noise causes great harm to the health of personnel. In order to suppress the high-frequency noise generated during the blade frequency measurement process, a sound insulation device 19 is designed according to the structural characteristics and physical dimensions of the entire frequency measurement system. The measurement process is enclosed in the sound insulation device 19, and the sound insulation size is about (6000×4500×3500) mm, which can effectively control the noise within 75dB.

[0054] In some embodiments, it also includes: an air conditioner 20, and the air conditioner 20 is arranged in the sound insulation device 19.

[0055] In some embodiments, the system further includes: a cooling fan 10 , which is connected to the first vibration table 1 or the second vibration table 2 and is used to cool the first vibration table 1 or the second vibration table 2 .

[0056] In some embodiments, it also includes: a control system, the control system includes a main controller PLC, the main controller PLC is used for the logic control of the entire system, and the detection status of the part detection sensor, the status of the fixture, the alarm information, the production product model, the production shift and the output during the measurement process can all be displayed online. At the same time, when the device controlled by the control system fails, it can automatically diagnose and generate corresponding sound and light alarm signals, and display the fault information on the on-site distribution background system. After the fault is eliminated and confirmed, the online task can continue to be completed automatically.

[0057] In some embodiments, the main controller PLC adopts Siemens S7-200SMART series PLC.

[0058] The main functions of the control system are implemented as follows:

[0059] 1. Use industrial computers to display the detection status of part detection sensors, fixture status, alarm information, production product models, production shifts and output.

[0060] 2. The control mode is switched through the control button. The main control modes are manual, automatic and emergency stop. Manual control mode: In the manual operation mode, the electrical control system manually starts / stops each motor in forward and reverse directions. Online control mode: In the online control mode, the device receives instructions from the host computer to achieve automatic control of the device.

[0061] 3. Emergency stop and fault alarm: The electric control cabinet and touch screen have emergency stop operation function. When the emergency stop button is pressed, all the devices controlled in the area stop running. When the device controlled by the system fails, it can automatically diagnose and generate corresponding sound and light alarm signals, and display the fault information on the on-site distribution background system. After the fault is eliminated and confirmed, the online task can continue to be completed automatically.

[0062] In some embodiments, it also includes: a software system, which is written using NI LabVIEW software, and its control interface includes a principle display panel, a control panel, a data display panel, and a channel verification panel. The principle display panel can not only clearly show the working principle of the entire system, but also observe the operating status of the components, so as to facilitate the determination of whether there are any control errors. The control panel mainly includes control buttons for components such as motors and solenoid valves. The operator can control the actions of the corresponding components only by using the mouse. The data display panel mainly displays data such as the axis position in the system in the form of a combination of graphics and numbers. The functions of the software system include:

[0063] (1) Rights management function

[0064] The login interface sets up permission management functions (divided into administrators, technicians, and operators), which can create, save, and modify user information, identify different user permissions, and open software functions according to permissions.

[0065] (2) Time recording function

[0066] The time recording function can be set to record the use and maintenance of the equipment.

[0067] (3) Identification function

[0068] It can automatically recognize the characters on the blades and save the recognized data locally.

[0069] (4) Report generation function

[0070] The measured data can be printed out as work cards according to the established work card format.

[0071] (5) Data management

[0072] Ability to query historical data by machine number or command number, upload or print historical data.

[0073] (6) Swipe the card to obtain the work dispatch information

[0074] When in use, log in by swiping the work card, obtain the work dispatch information from the server through the employee ID number registered in the background, and automatically display it in the interface. The operator selects the order number to conduct the corresponding test.

[0075] (7)Data upload function

[0076] The equipment test data and equipment status data are processed centrally and uploaded to the factory server. Users can query such information through the designated website of the factory intranet. After such data is processed by the information center, the remote printing function of the electronic work card can be realized.

[0077] The data upload implementation plan is as follows:

[0078] The equipment designer first logs in to the factory server website to register the equipment, fills in the network database according to the equipment test data requirements and generates a data interaction interface file (registration parameters include equipment number, test product information, collected digital quantity information, collected analog quantity information, user login information, equipment status, etc.). Then the local online measurement software generates a network interaction file in .xml format according to the registration parameters and the established interface file format, and uploads it to the factory server.

[0079] The network server unpacks and processes the uploaded data and determines whether the format meets the requirements. If it does, it will be permanently saved; otherwise, it will be returned and an "Upload Failed" prompt message will be displayed on the registration interface.

[0080] (8) Network reporting function

[0081] After completing the data upload, the user can log in to the designated network interface to view the relevant test data. The user work card manager needs to upload and complete the network work card template and issue the .xml file at the same time. The device will upload data according to the issued .xml file. After the upload is successful, the network work card can be generated on the network.

[0082] The complete measurement process of the aircraft engine blade automatic frequency measurement system provided by this application is achieved by the following steps:

[0083] (I) Power on

[0084] Push the circuit breaker switch in the power box of the device upward to turn on the power, and then press the green lighted "Power Start" button on the operation console panel. After the device is powered on, the white "Incoming Power" indicator light will light up.

[0085] (II) Start the vibration table and robot

[0086] Turn the key switch on the vibration control cabinet to the "on" position, the vibration control cabinet will automatically power on, the touch screen will light up and display the picture. After power on, the manipulator will automatically start, check whether the "mode" switch on the manipulator control cabinet is turned to the automatic operation mode.

[0087] (III) Turn on the air conditioner for 20

[0088] Press the air conditioner 20 on / off key to turn on the air conditioner 20, adjust the air conditioner 20 working mode to cooling mode, and adjust the set temperature to 22°C. Empty the condensate water collection bucket of the air conditioner 20. The air conditioner 20 should be turned on before turning on the vibration table.

[0089] (IV) Choose tooling

[0090] Install the tooling corresponding to the blade on the vibration table. There is a pin positioning device on the tooling installation surface, and the tooling should be installed in place.

[0091] (V) Placement of leaves

[0092] Place the blades to be tested on the blade rack 7 in order. Each blade corresponds to a blade rack 7 and cannot be mixed. Only one type of blade can be placed and tested at a time. When placing the blades, the blade numbers must be placed in order according to the numbers marked on the blade rack 7. Leave the blades that do not need to be tested blank. When placing the blades, pay attention to inserting the blades into place.

[0093] (VI) Locking the blade frame

[0094] Push the blade rack 7 with the blades arranged into the loading position using a cart and press the two locking buttons. The locking cylinder will fix the blade rack 7 at the loading position. If the locking is abnormal, the device cannot be opened.

[0095] (VII) Turn on the visual system

[0096] Click the vision software icon on the desktop of the industrial computer to run the vision software.

[0097] (VIII) Start the measurement system

[0098] Click the "Amplifier Control" icon on the vibration table touch screen to enter the amplifier control interface, click the "Power On" button to start the power supply, click the "Start" button after a delay of about 3 seconds to start the amplifier, and adjust the gain to the corresponding ratio. The main interface can be divided into several areas, including the main menu, waveform display, result data display, product measurement parameters, alarm display, operation buttons and status display.

[0099] (IX) Startup test

[0100] Before starting the test, please confirm again the blade model, tooling model, blade placement, blade box placement, gripper position and sequence on the gripper frame, vibration table height, whether the key switch on the manipulator control cabinet is turned to the automatic operation mode position, whether the key switch on the operation panel is turned to the "automatic" position, and whether the air conditioner 20 is turned on. Click the "Start" button, the device will start up gradually, and the "Operation Status" indicator light will turn green and flash after the startup is completed.

[0101] (X) Test completed

[0102] After the feeding robot 6 and the detection robot 5 have taken all the blades on the blade rack 7 or tested the set number of blades, the system will stop running, and the feeding robot 6 will put the clamp back to the clamp rack and return it to its original position. The measurement data results are automatically recorded and transmitted to the corresponding website for record use.

[0103] (11) Shutdown

[0104] Before shutting down the system, make sure that the manipulator has returned to its original position and the tightening shaft 12 is not in the tightening position. Before shutting down the test software, first click the down button on the touch screen to adjust the gain of the vibration table to 0%, then click the "Reset" button on the touch screen of the vibration table control cabinet, and click "Shutdown" to stop the vibration table (the fan will continue to run for about 10 minutes after the vibration table is shut down to ensure the cooling of the coil).

[0105] In summary, compared with the prior art, the system provided by this application integrates the traditional blade frequency measurement process through mechanization, automation and information technology, designs the vibration system, visual inspection system, mechanical motion structure, sound insulation device, control system, automatic tightening device, and data acquisition system to achieve high-quality and high-efficiency automatic measurement of blade frequency. This method is mainly used for the measurement of the natural frequency of aircraft engine blades. The beneficial effects produced include: the production efficiency of the automated measurement method is doubled compared to the efficiency of traditional manual operations, effectively reducing the production cycle and labor intensity; the automated measurement method realizes de-humanization operations, fully eliminates human interference factors, ensures the stability of process quality, and saves labor costs; the automated measurement method can effectively control noise pollution in the production process and eliminate the risk of occupational diseases.

[0106] Note that, unless otherwise directly stated, all features disclosed in this specification (including any attached claims, abstracts and drawings) may be replaced by alternative features for achieving the same, equivalent or similar purposes. Therefore, unless otherwise explicitly stated, each feature disclosed is only an example of a group of equivalent or similar features. Where used, further, preferably, further and more preferably are simple beginnings for elaborating another embodiment based on the aforementioned embodiment, and the content of the further, preferably, further or more preferably followed by the combination with the aforementioned embodiment constitutes a complete construction of another embodiment. Several further, preferably, further or more preferably settings following the same embodiment can be arbitrarily combined to form another embodiment.

[0107] In the implementation of functions and steps, the corresponding functions and steps in various embodiments may also occur in a different order than shown. For example, two consecutive functions and steps may actually be performed or implemented substantially in parallel, and they may sometimes be performed or implemented in the opposite order, depending on the functions involved.

[0108] Although the present application has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made to the present application. Therefore, these modifications or improvements made without departing from the spirit of the present application all fall within the scope of protection claimed in the present application.

Claims

1. An automatic frequency measurement system for aircraft engine blades, characterized in that: include: The first vibration table, the second vibration table, the detection robot, the loading robot, the inverted visual rack, the blade rack, and the automatic tightening device, among which, The detection manipulator is arranged on one side of the first excitation platform or the second excitation platform, and a frequency measuring instrument is arranged on the detection manipulator; The feeding manipulator is arranged on one side of the blade material rack, and is provided with a blade gripper and a two-dimensional visual camera; There are two sets of automatic tightening devices, which are respectively arranged on one side of the first excitation platform and the second excitation platform; The inverted vision frame is arranged at one side of the blade material rack, and a three-dimensional vision camera is arranged on the inverted vision frame.

2. The aircraft engine blade automatic frequency measurement system according to claim 1, characterized in that: The automatic tightening device includes a tightening shaft, a first linear guide, a second linear guide, a first cylinder, and a second cylinder. The first linear guide is slidably connected to a first slide. The tightening shaft is arranged on the first slide, and the end of the tightening shaft faces the first excitation table or the second excitation table. The second linear guide is provided with a second slide. The first cylinder and the first linear guide are both arranged on the second slide. The output shaft of the first cylinder is parallel to the first linear guide and connected to the first slide. The second cylinder and the second linear guide are arranged on a supporting platform, and the output shaft of the second cylinder is parallel to the second linear guide and connected to the second slide.

3. The aircraft engine blade automatic frequency measurement system according to claim 1, characterized in that: Also includes: The sound insulation device is annular and surrounds the automatic tightening device, the first vibration table, the second vibration table, the detection robot, the loading robot and the cooling fan.

4. The automatic frequency measurement system for aircraft engine blades according to claim 3, characterized in that: Also includes: An air conditioner is arranged in the sound insulation device.

5. The aircraft engine blade automatic frequency measurement system according to claim 1, characterized in that: Also includes: A cooling fan is connected to the first vibration table or the second vibration table.

6. The aircraft engine blade automatic frequency measurement system according to claim 1, characterized in that: Also includes: The control system includes a main controller PLC, which is used for the logic control of the entire system. The measurement process realizes online display of the detection status of the part detection sensor, the status of the fixture, the alarm information, the production product model, the production shift and the output information.

7. The aircraft engine blade automatic frequency measurement system according to claim 6, characterized in that: The main controller PLC adopts Siemens S7-200SMART series PLC.

8. The aircraft engine blade automatic frequency measurement system according to claim 1, characterized in that: Also includes: The software system control interface includes a principle display panel, a control panel, a data display panel and a channel verification panel.

9. The aircraft engine blade automatic frequency measurement system according to claim 1, characterized in that: The detection manipulator adopts an ABB IRB1200 robot, which is used to complete the blade frequency measurement work; The loading and unloading manipulator is an ABB IRB2400 industrial robot, which is used for loading and unloading of blades.

10. The aircraft engine blade automatic frequency measurement system according to claim 1, characterized in that: The first excitation platform is controlled by a first excitation controller, and the second excitation platform is controlled by a second excitation controller.

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