Titanium alloy blisk blade profile grinding and polishing method based on ultrasonic vibration

Abstract

The embodiment of the invention discloses a titanium alloy blisk blade profile grinding and polishing method based on ultrasonic vibration, which comprises the following steps of: applying high-frequency micro-amplitude vibration between a grinding head and the surface of a titanium alloy blisk blade profile, so that friction force and cutting heat generated in the grinding process of the titanium alloy blisk blade profile are effectively reduced; the surface defects are reduced to the maximum extent while materials are removed, the problem of stress concentration caused by excessive cutting is solved, ultrasonic vibration further has a self-cleaning effect, blockage of the grinding head is prevented, and the stability of the machining process is improved. According to the technical scheme, the taper ball head rubber grinding head is adopted, the taper ball head rubber grinding head has excellent flexibility and shape adaptability and can be tightly attached to the complex curved surface of the titanium alloy blisk blade in the magic polishing process, the machining force can be effectively distributed in the machining process through the flexible characteristic of the rubber grinding head, and the machining efficiency is improved. And surface damage caused by overlarge local pressure of a traditional rigid grinding head is avoided.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of integral blisk blade processing, and in particular to a method for grinding and polishing a titanium alloy integral blisk blade surface based on ultrasonic vibration. Background Art

[0002] The blisk is one of the key structural parts in an aero-engine, usually made of titanium alloy or other high-performance alloy materials. The integrated design of the blades and the wheel disc of the blisk makes it lightweight, high-strength and highly reliable in the aero-engine. The uniqueness of this design places extremely high demands on the processing technology, especially in the blade profile processing, where its precision and surface quality directly affect the overall performance and service life of the aero-engine. Traditional blisk blade profile processing usually adopts mechanical processing (such as milling, grinding) and electrospark machining. These methods often face the following problems when processing titanium alloy blade profiles: 1. Insufficient processing accuracy: It is difficult to achieve high-precision processing on complex curved surfaces, especially when processing large curvature blade profiles, overcutting or undercutting is prone to occur, resulting in increased geometric errors of the blade profile; 2. Poor surface quality: During the machining process, the friction between the tool and the workpiece surface will cause a large surface roughness, which is difficult to meet the requirements of the aero-engine for the surface finish of the blade. 3. Large residual stress: During the processing, the workpiece surface will produce large residual stress due to the influence of processing heat and mechanical stress, which will lead to a decrease in the fatigue performance of the blade during service and increase the risk of blade failure. In addition, as titanium alloy is the main material for aircraft engine blades, it is widely used in the aerospace field due to its excellent strength-to-weight ratio and high temperature resistance. However, the high hardness and low thermal conductivity of titanium alloy make it easy for titanium alloy integral blades to generate large cutting forces and heat during traditional processing, resulting in increased tool wear, and the surface quality is difficult to meet high-precision requirements, reducing processing efficiency. At the same time, the complex curvature changes of the blade profile of the titanium alloy integral blade disk, the traditional processing scheme cannot adapt well to the complex curved surface, and cannot ensure the uniform contact between the grinding head and the workpiece surface during processing. In addition, it is difficult to control the surface finish and geometric accuracy, which increases the difficulty of processing.

[0003] The above problems need to be solved urgently. Summary of the invention

[0004] In order to solve the related technical problems, the present invention provides a method for predicting the grinding and polishing effect of a flexible abrasive tool under eccentricity to solve the problems mentioned in the above background technology part.

[0005] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0006] A titanium alloy blisk blade surface grinding and polishing method based on ultrasonic vibration, the method comprising:

[0007] Determine the frequency and amplitude of ultrasonic vibration according to the geometric shape and material properties of the titanium alloy blisk blade profile;

[0008] According to the three-dimensional model and material properties of the titanium alloy blisk blade surface, the grinding and polishing path and processing parameters of the titanium alloy blisk blade surface are determined;

[0009] The ultrasonic vibration is started, and the grinding head contacts the blade surface of the titanium alloy integral blisk to perform grinding and polishing.

[0010] As an optional embodiment, the frequency and amplitude of the ultrasonic vibration are determined according to the geometric shape and material properties of the titanium alloy integral blisk blade profile, and the method also includes:

[0011] The blade profile of the titanium alloy integral blade disk is preliminarily processed, wherein the preliminarily processing includes but is not limited to cleaning the blade surface of the titanium alloy integral blade disk, removing impurities, oil stains and oxide layers, and ensuring surface smoothness.

[0012] As an optional implementation, the preliminary processing of the blade profile of the titanium alloy blisk further includes:

[0013] The initial state of the blade profile of the titanium alloy integral blade disk is detected to determine its geometric shape and surface roughness, and to judge whether preliminary machining of the blade profile of the titanium alloy integral blade disk is required.

[0014] As an optional embodiment, the determining the frequency and amplitude of the ultrasonic vibration according to the geometric shape and material properties of the titanium alloy blisk blade profile also includes:

[0015] The ultrasonic vibration mode is determined according to the surface complexity and material hardness of the titanium alloy integral blade disk; wherein the ultrasonic vibration mode includes but is not limited to a continuous vibration mode and a pulse vibration mode.

[0016] As an optional embodiment, the titanium alloy blisk blade surface grinding and polishing method based on ultrasonic vibration also includes:

[0017] After the titanium alloy integral blisk blade profile is ground and polished, the surface roughness of the titanium alloy integral blisk blade profile is detected to determine whether the surface roughness of the titanium alloy integral blisk blade profile meets expectations.

[0018] As an optional implementation, the detecting the surface roughness of the titanium alloy integral blisk blade profile and judging whether the surface roughness of the titanium alloy integral blisk blade profile meets expectations further includes:

[0019] The geometric accuracy of the titanium alloy integral blade disk blade profile is tested to determine whether the geometric accuracy of the titanium alloy integral blade disk blade profile meets expectations.

[0020] As an optional implementation, the geometric accuracy includes but is not limited to the curvature and distortion of the titanium alloy integral blisk blade profile surface and the deviation of key dimensions of the titanium alloy integral blisk blade profile surface.

[0021] As an optional embodiment, the titanium alloy blisk blade surface grinding and polishing method based on ultrasonic vibration also includes:

[0022] The controller monitors and adjusts the ultrasonic vibration parameters in real time to ensure that the frequency and amplitude meet the set requirements during the grinding and polishing process.

[0023] As an optional implementation, the titanium alloy blisk blade profile grinding and polishing method based on ultrasonic vibration uses a tapered ball-end rubber grinding head for grinding and polishing.

[0024] The technical solution proposed in the embodiment of the present invention is based on ultrasonic vibration. By applying high-frequency micro-vibration between the grinding head and the surface of the titanium alloy integral blade disk blade profile, the friction and cutting heat generated during the grinding process of the titanium alloy integral blade disk blade profile are effectively reduced, making the contact between the grinding head and the titanium alloy integral blade disk blade profile become softer, thereby minimizing the generation of surface defects while removing the material, preventing the stress concentration problem caused by excessive cutting, and ultrasonic vibration also has a self-cleaning effect, which helps to prevent the grinding head from being blocked and improves the stability of the processing process. The technical solution proposed in the embodiment of the present invention adopts a tapered ball head rubber grinding head, which has excellent flexibility and shape adaptability. It can fit the complex curved surface of the titanium alloy integral blade disk blade closely during the magic polishing process. The flexible characteristics of the rubber grinding head enable it to effectively distribute the processing force during the processing process, avoiding the surface damage caused by excessive local pressure of the traditional rigid grinding head. In addition, by coating or embedding high-hardness micro-abrasives on the surface of the grinding head, the material removal efficiency and surface polishing effect are further improved, thereby significantly improving the surface finish and geometric accuracy after processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate and understand the technical solutions in the embodiments of the present invention, the following briefly introduces the background technology of the present invention and the drawings required for use in the description of the embodiments. 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 the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1A schematic diagram of a process for grinding and polishing a titanium alloy blisk blade surface based on ultrasonic vibration provided in the first embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the machining process of grinding and polishing the blade profile of a titanium alloy blisk provided in the second embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the working principle of the ultrasonic vibration system provided in the second embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1

[0031] Please refer to Figure 1 As shown, Figure 1 A schematic diagram of a titanium alloy blisk blade surface grinding and polishing method based on ultrasonic vibration provided in the first embodiment of the present invention. As shown in the figure, the titanium alloy blisk blade surface grinding and polishing method 100 based on ultrasonic vibration in this embodiment includes the following steps:

[0032] S101. Determine the frequency and amplitude of the ultrasonic vibration according to the geometry and material properties of the titanium alloy blisk blade profile;

[0033] S102. Determine the grinding and polishing path and processing parameters of the titanium alloy integral blisk blade surface according to the three-dimensional model and material properties of the titanium alloy integral blisk blade surface;

[0034] S103. Start the ultrasonic vibration, the grinding head contacts the titanium alloy integral blisk blade profile, and performs grinding and polishing.

[0035] Exemplarily, the method of determining the frequency and amplitude of the ultrasonic vibration according to the geometric shape and material properties of the titanium alloy integral blisk blade profile also includes:

[0036] The blade profile of the titanium alloy integral blade disk is preliminarily processed, wherein the preliminarily processing includes but is not limited to cleaning the blade surface of the titanium alloy integral blade disk, removing impurities, oil stains and oxide layers, and ensuring surface smoothness.

[0037] Exemplarily, the preliminary processing of the blade profile of the titanium alloy blisk may further include:

[0038] The initial state of the blade profile of the titanium alloy integral blade disk is detected to determine its geometric shape and surface roughness, and to judge whether preliminary machining of the blade profile of the titanium alloy integral blade disk is required.

[0039] Exemplarily, the method of determining the frequency and amplitude of the ultrasonic vibration according to the geometric shape and material properties of the titanium alloy integral blisk blade profile also includes:

[0040] The ultrasonic vibration mode is determined according to the surface complexity and material hardness of the titanium alloy integral blade disk; wherein the ultrasonic vibration mode includes but is not limited to a continuous vibration mode and a pulse vibration mode.

[0041] Exemplarily, the titanium alloy blisk blade surface grinding and polishing method 100 based on ultrasonic vibration also includes:

[0042] After the titanium alloy integral blisk blade profile is ground and polished, the surface roughness of the titanium alloy integral blisk blade profile is detected to determine whether the surface roughness of the titanium alloy integral blisk blade profile meets expectations.

[0043] Exemplarily, the detecting the surface roughness of the titanium alloy integral blade disk blade profile, and judging whether the surface roughness of the titanium alloy integral blade disk blade profile meets expectations, further comprises:

[0044] The geometric accuracy of the titanium alloy integral blade disk blade profile is tested to determine whether the geometric accuracy of the titanium alloy integral blade disk blade profile meets expectations.

[0045] Exemplarily, the geometric accuracy includes but is not limited to the curvature and distortion of the titanium alloy integral blade disk blade profile surface and the deviation of key dimensions of the titanium alloy integral blade disk blade profile surface.

[0046] Exemplarily, the titanium alloy blisk blade surface grinding and polishing method 100 based on ultrasonic vibration also includes:

[0047] The controller monitors and adjusts the ultrasonic vibration parameters in real time to ensure that the frequency and amplitude meet the set requirements during the grinding and polishing process.

[0048] Exemplarily, the titanium alloy blisk blade profile grinding and polishing method 100 based on ultrasonic vibration uses a tapered ball-end rubber grinding head for grinding and polishing.

[0049] The titanium alloy integral impeller blade profile grinding and polishing method 100 based on ultrasonic vibration proposed in this embodiment effectively reduces the friction and cutting heat generated during the grinding process of the titanium alloy integral impeller blade profile by applying high-frequency micro-vibration between the grinding head and the titanium alloy integral impeller blade profile surface, making the contact between the grinding head and the titanium alloy integral impeller blade profile gentler, thereby minimizing the generation of surface defects while removing material and preventing stress concentration problems caused by excessive cutting. In addition, ultrasonic vibration also has a self-cleaning effect, which helps prevent clogging of the grinding head and improves the stability of the processing process.

[0050] The titanium alloy blisk blade profile grinding and polishing method 100 based on ultrasonic vibration proposed in this embodiment uses a tapered ball-end rubber grinding head, which has excellent flexibility and shape adaptability. It can closely fit the complex curved surface of the titanium alloy blisk blade during the magic polishing process. The flexible characteristics of the rubber grinding head enable it to effectively distribute the processing force during the processing, avoiding the surface damage caused by excessive local pressure of the traditional rigid grinding head. In addition, by coating or embedding high-hardness micro-abrasives on the surface of the grinding head, the material removal efficiency and surface polishing effect are further improved, thereby significantly improving the surface finish and geometric accuracy after processing.

[0051] The titanium alloy integral blade disc blade surface grinding and polishing method 100 based on ultrasonic vibration proposed in this embodiment effectively solves the common surface quality problems in traditional processing methods, significantly reduces the surface residual stress, and improves the fatigue performance and service life of the blade; and the flexible design of the tapered ball head rubber grinding head and the auxiliary effect of ultrasonic vibration make the scheme proposed in this embodiment particularly suitable for processing complex curved surfaces and parts with high precision requirements, and has broad industrial application prospects. It is worth mentioning that the titanium alloy integral blade disc blade surface grinding and polishing method 100 based on ultrasonic vibration proposed in this embodiment is not only suitable for the manufacture of aircraft engine blades, but can also be extended to other fields that require high-precision surface treatment, such as medical equipment, precision machinery manufacturing and high-end consumer electronics. Complex curved surface parts processing. In these application scenarios, the titanium alloy integral blade disc blade surface grinding and polishing method 100 based on ultrasonic vibration proposed in this embodiment can bring significant economic benefits and technical advantages to users by improving processing quality and efficiency.

[0052] Embodiment 2

[0053] The titanium alloy blisk blade surface grinding and polishing method based on ultrasonic vibration in this embodiment includes the following steps:

[0054] Determine the frequency and amplitude of ultrasonic vibration according to the geometric shape and material properties of the titanium alloy blisk blade profile;

[0055] According to the three-dimensional model and material properties of the titanium alloy blisk blade surface, the grinding and polishing path and processing parameters of the titanium alloy blisk blade surface are determined;

[0056] The ultrasonic vibration is started, and the grinding head contacts the blade surface of the titanium alloy integral blisk to perform grinding and polishing.

[0057] Exemplarily, the method of determining the frequency and amplitude of the ultrasonic vibration according to the geometric shape and material properties of the titanium alloy integral blisk blade profile also includes:

[0058] The blade profile of the titanium alloy blisk is preliminarily processed, wherein the preliminarily processing includes but is not limited to cleaning the blade surface of the titanium alloy blisk, removing impurities, oil stains and oxide layers, ensuring surface smoothness and pollution-free, and ensuring the effect of subsequent processing. In this embodiment, if necessary, chemical cleaning or ultrasonic cleaning process can be used to remove surface impurities.

[0059] Exemplarily, the preliminary processing of the blade profile of the titanium alloy blisk may further include:

[0060] The initial state of the blade profile of the titanium alloy integral blade disk is detected to determine its geometric shape and surface roughness, and to judge whether preliminary machining of the blade profile of the titanium alloy integral blade disk is required.

[0061] In this embodiment, a measuring instrument is used to detect the initial state of the blade profile and record its geometric shape and surface roughness. If the blade profile of the titanium alloy integral blade disk has a large geometric error, preliminary machining is performed to make it basically meet the design requirements. This step helps to reduce the workload of subsequent grinding and ensure the final machining accuracy. The preliminary machining can be performed using traditional CNC milling or rough grinding processes.

[0062] Exemplarily, the method of determining the frequency and amplitude of the ultrasonic vibration according to the geometric shape and material properties of the titanium alloy integral blisk blade profile also includes:

[0063] The ultrasonic vibration mode is determined according to the surface complexity and material hardness of the titanium alloy integral blade disk; wherein the ultrasonic vibration mode includes but is not limited to a continuous vibration mode and a pulse vibration mode.

[0064] Exemplarily, the titanium alloy blisk blade surface grinding and polishing method based on ultrasonic vibration also includes:

[0065] After the titanium alloy integral blisk blade profile is ground and polished, the surface roughness of the titanium alloy integral blisk blade profile is detected to determine whether the surface roughness of the titanium alloy integral blisk blade profile meets expectations.

[0066] Exemplarily, the detecting the surface roughness of the titanium alloy integral blade disk blade profile, and judging whether the surface roughness of the titanium alloy integral blade disk blade profile meets expectations, further comprises:

[0067] The geometric accuracy of the titanium alloy integral blade disk blade profile is tested to determine whether the geometric accuracy of the titanium alloy integral blade disk blade profile meets expectations.

[0068] In this embodiment, after grinding and polishing, the titanium alloy integral blade disc blade profile is tested using a surface roughness meter. By testing the surface roughness of the titanium alloy integral blade disc blade profile after grinding and polishing, it is judged whether the effect of ultrasonic vibration processing has reached the expected effect. After the surface roughness of the titanium alloy integral blade disc blade profile is tested, the geometric accuracy of the titanium alloy integral blade disc blade profile is tested. In this embodiment, a three-coordinate measuring instrument or laser scanning equipment is used but not limited to for geometric accuracy testing to ensure that the geometric shape of the titanium alloy integral blade disc blade meets the design requirements. In this embodiment, the geometric accuracy includes but is not limited to the curvature and distortion of the titanium alloy integral blade disc blade profile surface and the deviation of the key dimensions of the titanium alloy integral blade disc blade profile. Through the above-mentioned detection, the effect of grinding and polishing in this embodiment is comprehensively evaluated to ensure that the titanium alloy integral blade disc blade profile not only has a good surface finish, but also meets its geometric design specifications. It should be noted that if the surface roughness and geometric accuracy test results of the titanium alloy integral blade disc blade surface show deviations, the processing parameters should be adjusted in time or necessary secondary processing should be performed to correct possible errors, including resetting the frequency and amplitude of ultrasonic vibration, adjusting the feed speed of the grinding head, or changing the grinding path. Through these optimization measures, the processing quality can be further improved to ensure that the final product meets the requirements of high precision and high performance.

[0069] Exemplarily, the titanium alloy blisk blade surface grinding and polishing method based on ultrasonic vibration also includes:

[0070] The controller monitors and adjusts the parameters of the ultrasonic vibration in real time to ensure that the frequency and amplitude meet the set requirements during the grinding and polishing process. In this embodiment, the controller can also dynamically adjust the parameters according to the processing feedback to optimize the processing effect.

[0071] Exemplarily, the titanium alloy blisk blade surface grinding and polishing method based on ultrasonic vibration uses a tapered ball-end rubber grinding head for grinding and polishing. In this embodiment, by coating or embedding high-hardness micro-abrasive particles on the surface of the grinding head, the material removal efficiency and surface polishing effect are further improved, thereby significantly improving the surface finish and geometric accuracy after processing.

[0072] In this embodiment, the grinding and polishing path and processing parameters of the titanium alloy integral blade disk blade surface are determined according to the three-dimensional model and material properties of the titanium alloy integral blade disk blade surface. In this embodiment, the grinding and polishing path of the titanium alloy integral blade disk blade surface by ultrasonic vibration grinding and polishing of the taper ball head rubber grinding head is obtained by CAM software, such as Figure 2 shown.

[0073] Specifically, in practical applications, when the technical solution of this embodiment is used to grind and polish the titanium alloy integral blade disc blade profile, an ultrasonic vibration system is installed on a CNC machining center or grinding equipment, and its vibration direction is ensured to be consistent with the movement direction of the grinding head. Then, the working parameters of the ultrasonic vibration system are debugged, including vibration frequency, amplitude and mode (continuous or pulsed), to ensure that the system operates stably. When a taper ball head rubber grinding head is selected, the taper ball head rubber grinding head is installed on the ultrasonic vibration system to ensure that the contact surface between the grinding head and the titanium alloy integral blade disc blade profile meets the preset requirements. According to the titanium alloy integral blade disc blade profile material and grinding requirements, the grinding feed speed, cutting depth, ultrasonic vibration parameters and grinding and polishing path are set. In the integral blade disc ultrasonic vibration grinding and polishing test, the taper ball head rubber grinding head is in contact with the titanium alloy integral blade disc blade profile surface under the action of high-frequency vibration; the processed titanium alloy integral blade disc blade profile is inspected using a surface roughness meter and a three-dimensional coordinate measuring machine to check whether its surface finish and geometric accuracy meet the design requirements. After confirming that the workpiece quality meets the standards, the entire machining process is completed and the machining parameters are recorded for subsequent optimization.

[0074] In this embodiment, the ultrasonic vibration system mainly includes a vibration generator, a transducer and a controller. The vibration generator is responsible for generating high-frequency electrical signals, and is usually composed of a frequency-adjustable signal generator and a power amplifier. The transducer converts the electrical signal into high-frequency mechanical vibration and transmits this vibration to the grinding head to form a micro-vibration. The controller is used to adjust and monitor the working state of the entire system to ensure the stability of the vibration parameters. The working principle of the ultrasonic vibration system is as follows Figure 3 As shown, 301 is the ultrasonic knife handle, 302 is the main shaft hub, 303 is the pulling mechanism, 304 is the external power connection device, 305 is the bearing, and 306 is the spindle. The installation process of the ultrasonic vibration system needs to ensure that the connection between the transducer and the grinding head is stable to avoid energy loss during the vibration process.

[0075] Before formal processing, the ultrasonic vibration system is calibrated to ensure that the vibration frequency and amplitude meet the set parameters. The calibration process includes checking the working status of the transducer, the accuracy of the vibration frequency, and the uniformity of the vibration amplitude. The calibrated ultrasonic vibration system can maintain a stable vibration effect during the processing.

[0076] The frequency and amplitude of the ultrasonic vibration are determined according to the geometric shape and material properties of the titanium alloy integral blade disk blade profile. In this embodiment, the frequency range is set at 20-40kHz and the amplitude range is 5-20 microns. Higher frequencies help to improve material removal rates, while moderate amplitudes can ensure surface finish. Continuous vibration mode or pulse vibration mode can be selected. Continuous vibration is suitable for uniform material removal, while pulse vibration helps to reduce processing heat accumulation and prevent workpiece deformation. The choice of specific mode should be adjusted according to the complexity of the blade surface and the hardness of the material. The controller is used to monitor and adjust the vibration parameters in real time to ensure that the vibration frequency and amplitude remain stable during the processing process. The controller can also dynamically adjust parameters based on processing feedback to optimize the processing effect.

[0077] After the ultrasonic vibration system is started, the grinding head contacts the surface of the titanium alloy blade under the action of high-frequency vibration. The introduction of ultrasonic vibration significantly reduces the grinding force and cutting temperature commonly seen in traditional grinding processes. This friction-reducing effect allows the grinding head to remove material more easily while avoiding surface burns and microstructural changes caused by excessive heat accumulation. The micro-amplitude high-frequency vibration brought by ultrasonic vibration allows the grinding head to remove material evenly and carefully on the blade surface. Each vibration cycle can effectively break up the tiny bumps and flaws on the surface, so that the final surface quality meets the design requirements. Compared with traditional grinding, ultrasonic vibration can reduce the appearance of processing textures and surface ripples, and significantly improve the finish and accuracy of the blade profile. In addition, in order to achieve the required surface roughness and finish, multiple grinding and polishing processes are usually required. After each process, the processing quality of the blade surface is tested, and the feed speed and ultrasonic vibration parameters of the grinding head are adjusted if necessary to gradually improve the surface quality. In the polishing stage, the vibration frequency can be reduced or the amplitude can be increased so that the grinding head can complete the final surface finishing at a lower grinding force.

[0078] The titanium alloy integral blade disc blade profile grinding and polishing method based on ultrasonic vibration proposed in this embodiment effectively reduces the friction and cutting heat generated during the grinding process of the titanium alloy integral blade disc blade profile by applying high-frequency micro-vibration between the grinding head and the titanium alloy integral blade disc blade profile surface, making the contact between the grinding head and the titanium alloy integral blade disc blade profile more gentle, thereby minimizing the generation of surface defects while removing materials, preventing stress concentration problems caused by excessive cutting, and ultrasonic vibration also has a self-cleaning effect, which helps to prevent the grinding head from clogging and improves the stability of the processing process. The titanium alloy integral blade disc blade profile grinding and polishing method based on ultrasonic vibration proposed in this embodiment adopts a tapered ball head rubber grinding head, which has excellent flexibility and shape adaptability. It can fit the complex curved surface of the titanium alloy integral blade disc blade tightly during the magic polishing process. The flexible characteristics of the rubber grinding head enable it to effectively distribute the processing force during the processing process, avoiding the surface damage caused by excessive local pressure of the traditional rigid grinding head. In addition, by coating or embedding high-hardness abrasive particles on the surface of the grinding head, the material removal efficiency and surface polishing effect are further improved, thereby significantly improving the surface finish and geometric accuracy after processing.

[0079] The titanium alloy integral blade disc blade surface grinding and polishing method based on ultrasonic vibration proposed in this embodiment effectively solves the common surface quality problems in traditional processing methods, significantly reduces the surface residual stress, and improves the fatigue performance and service life of the blade; and the flexible design of the tapered ball head rubber grinding head and the auxiliary effect of ultrasonic vibration make the scheme proposed in this embodiment particularly suitable for processing complex curved surfaces and parts with high precision requirements, and has broad industrial application prospects. It is worth mentioning that the titanium alloy integral blade disc blade surface grinding and polishing method based on ultrasonic vibration proposed in this embodiment is not only suitable for the manufacture of aircraft engine blades, but can also be extended to other fields that require high-precision surface treatment, such as medical equipment, precision machinery manufacturing, and high-end consumer electronics. Complex curved surface parts processing. In these application scenarios, the titanium alloy integral blade disc blade surface grinding and polishing method based on ultrasonic vibration proposed in this embodiment can bring significant economic benefits and technical advantages to users by improving processing quality and efficiency.

[0080] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A titanium alloy blisk blade surface grinding and polishing method based on ultrasonic vibration, characterized in that: include: Determine the frequency and amplitude of ultrasonic vibration according to the geometric shape and material properties of the titanium alloy blisk blade profile; According to the three-dimensional model and material properties of the titanium alloy blisk blade surface, the grinding and polishing path and processing parameters of the titanium alloy blisk blade surface are determined; The ultrasonic vibration is started, and the grinding head contacts the blade surface of the titanium alloy integral blisk to perform grinding and polishing.

2. The method for grinding and polishing the titanium alloy blisk blade profile based on ultrasonic vibration according to claim 1, characterized in that: The method of determining the frequency and amplitude of ultrasonic vibration according to the geometric shape and material properties of the titanium alloy integral blisk blade profile also includes: The blade profile of the titanium alloy integral blade disk is preliminarily processed, wherein the preliminarily processing includes but is not limited to cleaning the blade surface of the titanium alloy integral blade disk, removing impurities, oil stains and oxide layers, and ensuring surface smoothness.

3. The method for grinding and polishing the titanium alloy blisk blade profile based on ultrasonic vibration according to claim 2, characterized in that: The preliminary processing of the blade profile of the titanium alloy blisk further includes: The initial state of the blade profile of the titanium alloy integral blade disk is detected to determine its geometric shape and surface roughness, and to determine whether preliminary machining of the blade profile of the titanium alloy integral blade disk is required.

4. The method for grinding and polishing the titanium alloy blisk blade profile based on ultrasonic vibration according to claim 1, characterized in that: The method of determining the frequency and amplitude of the ultrasonic vibration according to the geometric shape and material properties of the titanium alloy integral blisk blade profile also includes: The ultrasonic vibration mode is determined according to the surface complexity and material hardness of the titanium alloy integral blade disk; wherein the ultrasonic vibration mode includes but is not limited to a continuous vibration mode and a pulse vibration mode.

5. The method for grinding and polishing the titanium alloy blisk blade surface based on ultrasonic vibration according to claim 1, characterized in that: Also includes: After the titanium alloy integral blisk blade profile is ground and polished, the surface roughness of the titanium alloy integral blisk blade profile is detected to determine whether the surface roughness of the titanium alloy integral blisk blade profile meets expectations.

6. The method for grinding and polishing the titanium alloy blisk blade profile based on ultrasonic vibration according to claim 5, characterized in that: The detecting of the surface roughness of the titanium alloy integral blade disk blade profile surface and judging whether the surface roughness of the titanium alloy integral blade disk blade profile surface meets expectations further includes: The geometric accuracy of the titanium alloy integral blade disk blade profile is tested to determine whether the geometric accuracy of the titanium alloy integral blade disk blade profile meets expectations.

7. The method for grinding and polishing the titanium alloy blisk blade profile based on ultrasonic vibration according to claim 6, characterized in that: The geometric accuracy includes but is not limited to the curvature and distortion of the titanium alloy integral blade disk blade profile surface and the deviation of the key dimensions of the titanium alloy integral blade disk blade profile surface.

8. The method for grinding and polishing the titanium alloy blisk blade surface based on ultrasonic vibration according to claim 1, characterized in that: Also includes: The controller monitors and adjusts the ultrasonic vibration parameters in real time to ensure that the frequency and amplitude meet the set requirements during the grinding and polishing process.

9. The method for grinding and polishing the titanium alloy blisk blade profile based on ultrasonic vibration according to any one of claims 1 to 8, characterized in that: Use a tapered ball-head rubber grinding head for grinding and polishing.

10. The method for grinding and polishing the titanium alloy blisk blade profile based on ultrasonic vibration according to claim 9, characterized in that: The surface of the tapered ball-end rubber grinding head is plated or embedded with high-hardness micro-abrasive particles.

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