Local powder spreading device for repairing damaged part of blisk and repairing method

Abstract

The invention discloses a local powder spreading device for repairing a damaged part of a blisk and a repairing method, and particularly relates to the field of fan blades. The local powder spreading device comprises a rack, a first driving assembly is fixedly connected to the rack, the output end of the first driving assembly is fixedly connected with a first threaded rod, and the first driving assembly is used for driving the first threaded rod to rotate; the first threaded rod is rotationally connected to the rack, a sliding frame is in threaded connection to the first threaded rod, a second driving assembly is fixedly connected to one side of the sliding frame, and a second threaded rod is fixedly connected to the output end of the second driving assembly. Through three-dimensional scanning reverse modeling and ultra-thin layered slicing processes, geometrical characteristics of a damaged area can be accurately identified and reconstructed, a precise double-threaded-rod driving mechanism and an electric push rod are adopted for cooperative control, micron-scale accurate positioning of a repairing head in a three-dimensional space is achieved, and the repairing precision is improved. And it is ensured that each layer of repairing material can be perfectly attached to the preset theoretical model contour, and the repairing quality and the repairing efficiency are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of integral bladed disc repair technology, and more specifically, to a local powdering device and repair method for repairing damaged areas of integral bladed discs. Background Technology

[0002] Integral bladed disks are core components for achieving structural innovation and technological breakthroughs in next-generation aero-engines. Compared to traditional bladed disks, the integrated design helps reduce weight, reduce stage, increase efficiency, and improve reliability. However, damage to integral bladed disks caused by machining errors, as well as damage to blades from foreign objects or high-cycle fatigue during service, are common occurrences. Therefore, specific repair devices and methods are used to repair damaged areas of integral bladed disks.

[0003] Traditional integral bladed disk (IB) damage repair techniques typically employ integral laser cladding, electron beam welding, and linear friction welding. However, these techniques struggle to accurately replicate the complex curved surface profile of the blade, resulting in unevenness at the interface between the repaired area and the base material. This can lead to localized stress concentration areas and microcracks, directly impacting the aerodynamic shape of the repaired blade, reducing overall engine efficiency, and, more seriously, potentially inducing secondary fatigue damage during subsequent operation, threatening flight safety. Furthermore, the entire process is cumbersome and time-consuming, wasting precious metal powder materials and significantly extending the repair operation time.

[0004] In summary, to improve the quality and speed of integral bladed disk (IBD) repair, it is necessary to address the problem that traditional IBD damage repair techniques struggle to reproduce the complex curved surface contours of blades, resulting in the waste of precious metal powder materials and prolonged repair time. The goal is to make the IBD repair process faster, more efficient, and more precise. Summary of the Invention

[0005] The present invention provides a local powdering device and repair method for repairing damaged parts of an integral bladed disk. The problem to be solved is that traditional integral bladed disk damage repair technology is difficult to reproduce the complex curved surface contour of the blade, resulting in waste of precious metal powder materials and prolonging the repair operation time.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a local powder spreading device for repairing damaged areas of an integral impeller, comprising a frame, a drive assembly one fixedly connected to the frame, a first threaded rod fixedly connected to the output end of the drive assembly one, the drive assembly one being used to drive the first threaded rod to rotate, the first threaded rod being rotatably connected to the frame, a slide being threadedly connected to the first threaded rod, a drive assembly two fixedly connected to one side of the slide, a second threaded rod fixedly connected to the output end of the drive assembly two, the drive assembly two being used to drive the second threaded rod to rotate, the second threaded rod being rotatably connected to the slide, a slider being threadedly connected to the second threaded rod, an electric push rod fixedly connected to the bottom of the slider, an installation sleeve fixedly connected to the output end of the electric push rod, the electric push rod being used to push the installation sleeve to move vertically, a rotating assembly mounted on the installation sleeve, an internal gear meshing with the output end of the rotating assembly, the rotating assembly being used to drive the internal gear to rotate, symmetrical powder spreading nozzles and scrapers being fixedly connected to both sides of the internal gear respectively.

[0007] In a preferred embodiment, the drive assembly includes a first motor fixedly connected to the frame, the output end of the first motor being fixedly connected to a first gear via a shaft, the first motor driving the first gear to rotate, a second gear meshing with one side of the first gear, a first threaded rod fixedly connected to the center of the second gear, and a limit frame rotatably connected to the side of the first gear and the second gear away from the frame via a shaft.

[0008] In a preferred embodiment, the second drive assembly includes a second motor fixedly connected to one side of the carriage. The output end of the second motor is fixedly connected to a first wrap angle via a shaft. One end of a belt is sleeved on the outside of the first wrap angle, and a second wrap angle is sleeved on the other end of the belt. The second wrap angle is fixedly connected to a second threaded rod.

[0009] In a preferred embodiment, the rotating assembly includes a third motor fixedly connected to the bottom of the mounting sleeve. The output end of the third motor is fixedly connected to a third gear via a shaft. The third motor is used to drive the third gear to rotate. Two symmetrical fourth gears are meshed on both sides of the third gear. The fourth gears are rotatably connected to the mounting sleeve. The side of the fourth gear away from the third gear meshes with an internal gear.

[0010] In a preferred embodiment, the outer side of the mounting sleeve is provided with two symmetrical annular grooves, and the two sides of the internal gear are provided with two symmetrical limiting rings, which are slidably connected to the annular grooves.

[0011] In a preferred embodiment, a powder storage housing is fixedly connected to the top of the frame, and an ultrasonic vibrator is fixedly connected to the powder outlet of the powder storage housing. The ultrasonic vibrator is fixedly connected to the frame.

[0012] In a preferred embodiment, a conveying housing is fixedly connected to the bottom of the powder storage housing, and a fourth motor is fixedly connected to one end of the conveying housing near the first motor. A screw feed rod is fixedly connected to the output end of the fourth motor. The fourth motor is used to drive the screw feed rod to rotate, and the screw feed rod is rotatably connected inside the conveying housing.

[0013] In a preferred embodiment, a heating shell is fixedly connected to the outside of the conveying shell, and a spiral heating wire is wound between the conveying shell and the heating shell.

[0014] In a preferred embodiment, one end of a conveying pipe is fixedly connected to the end of the conveying housing away from the fourth motor, and the other end of the conveying pipe is fixedly connected to the powder spreading nozzle. A flow meter is fixedly connected to the conveying pipe.

[0015] When using the powder-coating device and method for repairing damaged areas of an integral bladed disk according to this technical solution, the steps are as follows:

[0016] Step 1: First, use a milling machine to process the individual damaged parts of the blades of the integral bladed disk into a plane in a specific way. The processing area includes the maximum damage area. Different processing methods are used for different damage modes. For blades with tip damage, the processing method is to make the processing surface parallel to the axis of the integral bladed disk and perpendicular to the radial direction of the blade. The processing direction is the minimum channel direction between two adjacent blades. For blades with inlet and outlet edge damage, the processing method is to make the processing surface perpendicular to the circumference of the blade. The processing direction is the minimum channel direction between two adjacent blades.

[0017] Step 2: Use a 3D scanner to perform 3D scanning on the blades and adjacent blades of the overall bladed disk. Through 3D reverse engineering, construct a 3D model of the processed individual blades from the scan data.

[0018] Step 3: Place the entire impeller into the printer forming cylinder and fix it. Using the theoretical model and the model of the area to be repaired, enlarge the model and then slice the model. The slice thickness is μm.

[0019] Step 4: Start the first motor in drive assembly one, which drives the first threaded rod to rotate through the first gear and the second gear, causing the slide to move in the left and right directions. Start the second motor in drive assembly two, which drives the second threaded rod to rotate through the first wrap angle, the belt and the second wrap angle, causing the slider to move in the front and back directions until the slider is above the repair area.

[0020] Step 5: Start the third motor in the rotating device. Through the third gear and the fourth gears on both sides, the internal gear will be driven to rotate, so that the powder spraying nozzles and scrapers on both sides are perpendicular to the area to be repaired.

[0021] Step Six: Start the fourth motor to drive the screw feeder to rotate, conveying the metal powder in the powder storage shell to the conveying pipe through the conveying shell. The heating wire between the conveying shell and the heating shell heats the metal powder, and the flow meter measures the flowing powder, so that the metal powder is sprayed out from the powder spreading nozzle at a certain flow rate and temperature.

[0022] Step 7: The slider drives the powder-spreading nozzle and scraper to move back and forth in a straight line in the area to be repaired, and the electric push rod drives the powder-spreading nozzle and scraper to move in a straight line in the vertical direction to achieve layer-by-layer powder-spreading printing until the repair of a single blade is completed;

[0023] Step 8: After repair, perform adaptive polishing to meet the surface size requirements.

[0024] The beneficial effects of this invention are as follows:

[0025] This invention uses 3D scanning reverse modeling and ultra-thin layered slicing technology to accurately identify and reconstruct the geometric features of the damaged area. It employs a precise double-threaded rod drive mechanism and electric push rod coordinated control to achieve micron-level precise positioning of the repair head in 3D space, ensuring that each layer of repair material perfectly conforms to the preset theoretical model outline. This fine control enables the repaired blade profile to completely restore the original design state, significantly improving the consistency of repair quality.

[0026] This invention enables the powder-spreading nozzle and scraper to rotate freely 180 degrees through an internal gear transmission mechanism. This adjustable structure can automatically adjust the working angle according to the characteristics of different damage sites. Whether it is radial damage at the blade tip or circumferential damage at the air intake and exhaust edges, it can maintain the optimal vertical powder-spreading posture, effectively solving the problem of insufficient adaptability of traditional repair devices.

[0027] This invention forms a complete closed-loop control system through a spiral powder feeding mechanism, a precise temperature control unit, and a real-time flow monitoring module. This optimizes the powder conveying path and heating uniformity, ensuring that the repair material is deposited stably under optimal process parameters. In conjunction with the use of an ultrasonic anti-blocking device, the risk of blockage during powder conveying is effectively avoided, thereby achieving high stability and reliability of the entire repair process. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0029] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention.

[0030] Figure 3 This is a schematic diagram of the first threaded rod structure of the present invention.

[0031] Figure 4This is a schematic diagram of the second threaded rod structure of the present invention.

[0032] Figure 5 This is a schematic cross-sectional view of the conveyor housing structure of the present invention.

[0033] Figure 6 This is a schematic diagram of the slider structure of the present invention.

[0034] Figure 7 This is a schematic cross-sectional view of the mounting sleeve of the present invention.

[0035] Figure 8 This is a schematic diagram of the internal gear structure of the present invention.

[0036] The attached figures are labeled as follows: 1. Frame; 201. First motor; 202. First gear; 203. Second gear; 204. Limiting frame; 3. First threaded rod; 4. Slide; 501. Second motor; 502. First wrap angle; 503. Belt; 504. Second wrap angle; 6. Second threaded rod; 7. Slider; 8. Electric push rod; 9. Mounting sleeve; 901. Annular groove; 1001. Third motor; 1002. Third gear; 1003. Fourth gear; 11. Internal gear; 1101. Limiting ring; 12. Powder spreading nozzle; 13. Scraper; 14. Powder storage shell; 15. Ultrasonic vibrator; 16. Conveying shell; 17. Fourth motor; 18. Screw feeder; 19. Heating shell; 20. Heating wire; 21. Conveying pipe; 22. Flow meter. Detailed Implementation

[0037] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0038] As a key core component of the next generation of aero-engines, the integral bladed disk (IBD) represents a major breakthrough and innovation in aero-engine manufacturing technology. This advanced component, which integrates the traditional separate blade and disk structure, achieves significant weight reduction and structural simplification by eliminating the traditional tenon-and-groove connection structure. The integrated design not only reduces the number of parts and assembly complexity, but also significantly improves aerodynamic efficiency by optimizing the continuity of airflow channels. While improving the thrust-to-weight ratio of the engine, the IBD structure also has higher structural integrity and operational reliability due to its interface-free characteristics, making it an indispensable core component of modern high-performance aero-engines. This innovative design enables the engine to maintain stable performance under more severe operating conditions, providing stronger and more reliable power support for aircraft.

[0039] However, integral bladed disks (IBDs) face numerous challenges and damage risks during manufacturing and use. During the manufacturing phase, due to their complex structure and special materials, IBDs are highly susceptible to defects such as dimensional deviations in blade profiles and damage to surface integrity caused by fluctuations in process parameters or tool wear. More seriously, during actual engine service, IBD blades are frequently subjected to impact damage from foreign objects, such as runway sand, hail, etc., which are sucked into the engine and impact the high-speed rotating blades. Simultaneously, under long-term high-speed, high-load operating conditions, blades are also prone to high-cycle fatigue damage. These factors can lead to different types of damage, such as notches and cracks, on the leading edge, trailing edge, or blade tip. If these damages are not repaired promptly, they can affect engine performance or even lead to catastrophic consequences. Therefore, developing specialized repair technologies and equipment tailored to the damage characteristics of IBDs is of great significance for ensuring the safe and reliable operation of aero engines.

[0040] Currently, the industry mainly relies on several traditional techniques for repairing integral bladed disk damage. Among them, integral laser cladding technology is widely used. This technology uses a high-energy laser beam to clad metal powder onto the damaged area to achieve material replenishment. However, this method has obvious limitations. Due to the large size of the laser spot and the heat-affected zone, it is difficult to accurately control the cladding area, which often affects the surrounding intact areas. At the same time, the high temperature generated during the laser cladding process can easily cause changes in the microstructure and properties of the base material, resulting in uneven metallurgical bonding at the repair interface. Similarly, although electron beam welding technology can perform precision welding in a vacuum environment, it requires extremely high precision in workpiece positioning and assembly, and the equipment is complex and expensive, resulting in high repair costs. Although linear friction welding technology can achieve good metallurgical bonding, it is only suitable for repairing specific types of damage, and its application scope is limited.

[0041] These traditional repair techniques have revealed a series of significant defects in practical applications. The most prominent problem is the difficulty in accurately reproducing the complex spatial curved surface profile of integral bladed disk blades. Integral bladed disk blades usually have complex three-dimensional twisted surfaces, and any slight deviation in the surface profile will significantly affect aerodynamic performance. Due to the lack of precise surface control and compensation capabilities, traditional repair methods often cannot completely restore the original design surface of the repaired area, resulting in a geometric discontinuity between the repaired area and the base material. This discontinuity not only disrupts the smooth flow of air, but also forms local stress concentration under working stress, becoming a potential source of danger for crack initiation and propagation.

[0042] Another serious problem is the thermal effects and metallurgical defects generated during the repair process. Traditional hot working repair methods inevitably introduce thermal stress into the repair area, leading to changes in the structure and performance degradation of the matrix material. Especially in the repair interface area, due to the temperature gradient and solidification shrinkage, defects such as microcracks and pores often appear. These defects are very easy to propagate under alternating loads during subsequent engine operation, becoming the origin of fatigue cracks and seriously threatening the structural integrity of the overall bladed disk. What is even more worrying is that these defects are often difficult to detect in time through conventional detection methods, posing serious safety hazards.

[0043] From the perspective of process flow, existing repair technologies also have many shortcomings. Before repair, the integral bladed disk usually needs to be removed from the engine and transported to a special repair workshop for processing. This process is not only time-consuming and labor-intensive, but also increases the risk of secondary damage. In actual repair operations, due to the small blade spacing and narrow channel of the integral bladed disk, traditional repair devices often have difficulty accurately locating the damaged part, and the operating space is limited.

[0044] These technical and process defects directly affect the overall performance of the repaired bladed disk. Aerodynamic deviations in the repaired area can lead to local flow separation, increasing flow losses and reducing engine efficiency. More seriously, metallurgical defects and residual stress at the repair interface can significantly reduce the fatigue life of the blades, potentially causing secondary damage during subsequent engine operation, or even catastrophic consequences such as blade breakage. From a maintenance perspective, the cumbersome repair process and long repair cycle severely impact engine maintenance efficiency, increase airline operating costs, and restrict the rapid deployment and efficient use of aviation equipment.

[0045] Refer to the instruction manual appendix Figures 1 to 8 A local powder-spreading device for repairing damaged areas of an integral impeller includes a frame 1. A drive assembly 1 is fixedly connected to the frame 1. A first threaded rod 3 is fixedly connected to the output end of the drive assembly 1. The drive assembly 1 is used to drive the first threaded rod 3 to rotate. The first threaded rod 3 is rotatably connected to the frame 1. A slide 4 is threadedly connected to the first threaded rod 3. A drive assembly 2 is fixedly connected to one side of the slide 4. A second threaded rod 6 is fixedly connected to the output end of the drive assembly 2. The drive assembly 2 is used to drive the second threaded rod 6 to rotate. The second threaded rod 6 is rotatably connected to the slide 4. A slider 7 is threadedly connected to the second threaded rod 6. An electric push rod 8 is fixedly connected to the bottom of the slider 7. A mounting sleeve 9 is fixedly connected to the output end of the electric push rod 8. The electric push rod 8 is used to push the mounting sleeve 9 to move vertically. A rotating assembly is installed on the mounting sleeve 9. An internal gear 11 is meshed with the output end of the rotating assembly. The rotating assembly is used to drive the internal gear 11 to rotate. Symmetrical powder-spreading nozzles 12 and scrapers 13 are fixedly connected to both sides of the internal gear 11, respectively.

[0046] It should be noted that the slide 4 has a threaded hole in the center, the size of which is adapted to the first threaded rod 3, and the frame 1 has limit grooves on both sides. The slide 4 is installed on the frame 1 through the limit grooves, which provide support for the slide 4 and limit its movement, so as to realize the stable movement of the slide 4. The slider 7 has a threaded hole in the center, the size of which is adapted to the second threaded rod 6. The electric push rod 8 is connected to an external power source, which provides electrical energy to the electric push rod 8 through current, thereby realizing the power output of the electric push rod 8.

[0047] Refer to the instruction manual appendix Figure 3 The drive assembly includes a first motor 201 fixedly connected to the frame 1. The output end of the first motor 201 is fixedly connected to a first gear 202 via a shaft. The first motor 201 is used to drive the first gear 202 to rotate. A second gear 203 is meshed with one side of the first gear 202. A first threaded rod 3 is fixedly connected to the center of the second gear 203. The side of the first gear 202 and the second gear 203 away from the frame 1 is rotatably connected to a limit frame 204 via a shaft.

[0048] It should be noted that the first gear 202 and the second gear 203 are size-matched to achieve stable power transmission, while the limit bracket 204 ensures a stable connection between the first gear 202 and the second gear 203.

[0049] Refer to the instruction manual appendix Figure 4 The second drive assembly includes a second motor 501 fixedly connected to one side of the carriage 4. The output end of the second motor 501 is fixedly connected to a first wrap angle 502 via a shaft. One end of a belt 503 is sleeved on the outside of the first wrap angle 502, and a second wrap angle 504 is sleeved on the other end of the belt 503. The second wrap angle 504 is fixedly connected to the second threaded rod 6.

[0050] It should be noted that the second motor 501 is mounted on the slide 4 and drives the first wrap angle 502 to rotate through the shaft. The first wrap angle 502, the second wrap angle 504 and the belt 503 have sufficient friction to make the transmission process stable.

[0051] Refer to the instruction manual appendix Figure 8 The rotating assembly includes a third motor 1001 fixedly connected to the bottom of the mounting sleeve 9. The output end of the third motor 1001 is fixedly connected to a third gear 1002 via a shaft. The third motor 1001 is used to drive the third gear 1002 to rotate. Two symmetrical fourth gears 1003 are meshed on both sides of the third gear 1002. The fourth gears 1003 are rotatably connected to the mounting sleeve 9. The side of the fourth gear 1003 away from the third gear 1002 meshes with the internal gear 11.

[0052] It should be noted that the mounting sleeve 9 has a through hole in the middle. The third gear 1002 is rotatably installed in the through hole of the mounting sleeve 9, and its size is slightly smaller than the size of the through hole to avoid motion interference. The mounting sleeve 9 has two symmetrical arc-shaped openings. The fourth gear 1003 is rotatably installed on these two arc-shaped openings. The left and right sides of the fourth gear 1003 mesh with the third gear 1002 and the internal gear 11, respectively. The fourth gear 1003 is sized to match the third gear 1002 and the internal gear 11 to achieve stable power transmission.

[0053] Refer to the instruction manual appendix Figure 7 The outer side of the mounting sleeve 9 is provided with two symmetrical annular grooves 901, and the two sides of the internal gear 11 are provided with two symmetrical limiting rings 1101, which are slidably connected to the annular grooves 901.

[0054] It should be noted that the annular groove 901 and the limiting ring 1101 are sized to match, providing support for the internal gear 11 while limiting its movement.

[0055] Refer to the instruction manual appendix Figure 5 A powder storage housing 14 is fixedly connected to the top of the frame 1, and an ultrasonic vibrator 15 is fixedly connected to the powder outlet of the powder storage housing 14. The ultrasonic vibrator 15 is fixedly connected to the frame 1.

[0056] It should be noted that the ultrasonic vibrator 15 is connected to an external power source, which provides electrical energy to the ultrasonic vibrator 15 through current, so that the ultrasonic vibrator 15 emits ultrasonic waves to prevent the powder outlet of the powder storage housing 14 from being blocked.

[0057] Refer to the instruction manual appendix Figure 5 The bottom of the powder storage housing 14 is fixedly connected to the conveying housing 16. The end of the conveying housing 16 near the first motor 201 is fixedly connected to the fourth motor 17. The output end of the fourth motor 17 is fixedly connected to the spiral feeding rod 18. The fourth motor 17 is used to drive the spiral feeding rod 18 to rotate. The spiral feeding rod 18 is rotatably connected inside the conveying housing 16.

[0058] It should be noted that the fourth motor 17 is installed on the conveying housing 16 and drives the screw feed rod 18 to rotate, thereby conveying the metal powder through the screw blades of the screw feed rod 18.

[0059] Refer to the instruction manual appendix Figure 5 A heating shell 19 is fixedly connected to the outside of the conveying shell 16, and a spiral heating wire 20 is wound between the conveying shell 16 and the heating shell 19.

[0060] It should be noted that the heating wire 20 is connected to an external power source, which converts electrical energy into heat energy to uniformly heat the conveying housing 16.

[0061] Refer to the instruction manual appendix Figure 6 One end of the conveying housing 16, away from the fourth motor 17, is fixedly connected to one end of the conveying pipe 21. The other end of the conveying pipe 21 is fixedly connected to the powder spreading nozzle 12. A flow meter 22 is fixedly connected to the conveying pipe 21.

[0062] It should be noted that the flow meter 22 accurately measures the powder passing through the conveying pipe 21, thereby achieving quantitative conveying of the powder.

[0063] Refer to the instruction manual appendix Figures 1 to 8 In this embodiment, the present invention provides a local powdering device and method for repairing damaged areas of an integral bladed disk, comprising the following steps:

[0064] Step 1: First, use a milling machine to process the individual damaged parts of the blades of the integral bladed disk into a plane in a specific way. The processing area includes the maximum damage area. Different processing methods are used for different damage modes. For blades with tip damage, the processing method is to make the processing surface parallel to the axis of the integral bladed disk and perpendicular to the radial direction of the blade. The processing direction is the minimum channel direction between two adjacent blades. For blades with inlet and outlet edge damage, the processing method is to make the processing surface perpendicular to the circumference of the blade. The processing direction is the minimum channel direction between two adjacent blades.

[0065] Step 2: Use a 3D scanner to perform 3D scanning on the blades and adjacent blades of the overall bladed disk. Through 3D reverse engineering, construct a 3D model of the processed individual blades from the scan data.

[0066] Step 3: Place the entire bladed disk into the forming cylinder of the printer and fix it. Enlarge the model of the area to be repaired using the theoretical model and then slice the model with a slice thickness of 5μm.

[0067] Step 4: Start the first motor 201 in drive assembly one, which drives the first threaded rod 3 to rotate through the first gear 202 and the second gear 203, causing the slide 4 to move in the left and right directions. Start the second motor 501 in drive assembly two, which drives the second threaded rod 6 to rotate through the first wrap angle 502, the belt 503 and the second wrap angle 504, causing the slider 7 to move in the front and back directions until the slider 7 is above the repair area.

[0068] Step 5: Start the third motor 1001 in the rotating device. Through the third gear 1002 and the fourth gears 1003 on both sides, the internal gear 11 is driven to rotate, so that the powder spraying nozzles 12 and scrapers 13 on both sides are perpendicular to the area to be repaired.

[0069] Step Six: Start the fourth motor 17 to drive the screw feeder 18 to rotate, and transport the metal powder in the powder storage shell 14 to the conveying pipe 21 through the conveying shell 16. The heating wire 20 between the conveying shell 16 and the heating shell 19 heats the metal powder. The flow meter 22 measures the flowing powder, so that the metal powder is sprayed out from the powder spraying nozzle 12 at a certain flow rate and a certain temperature.

[0070] Step 7: The slider 7 drives the powder-spreading nozzle 12 and the scraper 13 to move back and forth in a straight line in the area to be repaired, and the electric push rod 8 drives the powder-spreading nozzle 12 and the scraper 13 to move in a straight line in the vertical direction to achieve layer-by-layer powder-spreading printing until the repair of a single blade is completed.

[0071] Step 8: After repair, perform adaptive polishing to meet the surface size requirements.

[0072] It should be noted that this powder spreading device is installed above the printer's forming cylinder, repairing damaged parts from above the overall impeller, thus avoiding interference from the overall impeller on the operation of the powder spreading device. Furthermore, the movement of this powder spreading device can be calculated by the PLC control module and manually set to automatically perform the repair work.

[0073] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A local powdering device for repairing damaged areas of an integral bladed disk, characterized in that: Includes a frame (1), on which a drive assembly one is fixedly connected. The output end of the drive assembly one is fixedly connected to a first threaded rod (3). The drive assembly one is used to drive the first threaded rod (3) to rotate. The first threaded rod (3) is rotatably connected to the frame (1). A slide (4) is threadedly connected to the first threaded rod (3). A drive assembly two is fixedly connected to one side of the slide (4). The output end of the drive assembly two is fixedly connected to a second threaded rod (6). The drive assembly two is used to drive the second threaded rod (6) to rotate. The second threaded rod (6) is rotatably connected to the slide. (4) On the second threaded rod (6), a slider (7) is threadedly connected. An electric push rod (8) is fixedly connected to the bottom of the slider (7). The output end of the electric push rod (8) is fixedly connected to the mounting sleeve (9). The electric push rod (8) is used to push the mounting sleeve (9) to move vertically. A rotating component is installed on the mounting sleeve (9). The output end of the rotating component is meshed with an internal gear (11). The rotating component is used to drive the internal gear (11) to rotate. Symmetrical powder spraying nozzles (12) and scrapers (13) are fixedly connected to both sides of the internal gear (11).

2. The device for local powdering to repair damaged areas of an integral bladed disk according to claim 1, characterized in that: The drive assembly includes a first motor (201) fixedly connected to the frame (1). The output end of the first motor (201) is fixedly connected to a first gear (202) via a shaft. The first motor (201) is used to drive the first gear (202) to rotate. A second gear (203) is meshed on one side of the first gear (202). A first threaded rod (3) is fixedly connected to the center of the second gear (203). A limit frame (204) is rotatably connected to the side of the first gear (202) and the second gear (203) away from the frame (1) via a shaft.

3. The device for local powdering to repair damaged areas of an integral bladed disk according to claim 1, characterized in that: The second drive assembly includes a second motor (501) fixedly connected to one side of the slide (4). The output end of the second motor (501) is fixedly connected to a first wrap angle (502) via a shaft. One end of a belt (503) is sleeved on the outside of the first wrap angle (502), and the other end of the belt (503) is sleeved with a second wrap angle (504). The second wrap angle (504) is fixedly connected to the second threaded rod (6).

4. The device for local powdering to repair damaged areas of an integral bladed disk according to claim 1, characterized in that: The rotating assembly includes a third motor (1001) fixedly connected to the bottom of the mounting sleeve (9). The output end of the third motor (1001) is fixedly connected to a third gear (1002) via a shaft. The third motor (1001) is used to drive the third gear (1002) to rotate. Two symmetrical fourth gears (1003) are meshed on both sides of the third gear (1002). The fourth gears (1003) are rotatably connected to the mounting sleeve (9). The side of the fourth gear (1003) away from the third gear (1002) meshes with the internal gear (11).

5. The device for local powdering to repair damaged areas of an integral bladed disk according to claim 1, characterized in that: The mounting sleeve (9) has two symmetrical annular grooves (901) on the outside, and the internal gear (11) has two symmetrical limiting rings (1101) on both sides. The limiting rings (1101) and the annular grooves (901) are slidably connected.

6. The device for local powdering to repair damaged areas of an integral bladed disk according to claim 1, characterized in that: A powder storage shell (14) is fixedly connected to the top of the frame (1), and an ultrasonic vibrator (15) is fixedly connected to the powder outlet of the powder storage shell (14). The ultrasonic vibrator (15) is fixedly connected to the frame (1).

7. The device for local powdering to repair damaged areas of an integral bladed disk according to claim 6, characterized in that: The bottom of the powder storage shell (14) is fixedly connected to the conveying shell (16). The end of the conveying shell (16) near the first motor (201) is fixedly connected to the fourth motor (17). The output end of the fourth motor (17) is fixedly connected to the screw feed rod (18). The fourth motor (17) is used to drive the screw feed rod (18) to rotate. The screw feed rod (18) is rotatably connected inside the conveying shell (16).

8. The device for local powdering to repair damaged areas of an integral bladed disk according to claim 7, characterized in that: A heating shell (19) is fixedly connected to the outside of the conveying shell (16), and a spiral heating wire (20) is wound between the conveying shell (16) and the heating shell (19).

9. The device for local powdering to repair damaged areas of an integral bladed disk according to claim 8, characterized in that: One end of the conveying housing (16) away from the fourth motor (17) is fixedly connected to one end of the conveying pipe (21), and the other end of the conveying pipe (21) is fixedly connected to the powder spraying nozzle (12). A flow meter (22) is fixedly connected to the conveying pipe (21).

10. A device and method for local powdering to repair damaged areas of an integral bladed disk, characterized in that... Including the local powdering device for repairing damaged areas of an integral bladed disk as described in claims 1-9: Step 1: First, use a milling machine to process the individual damaged parts of the blades of the integral bladed disk into a plane in a specific way. The processing area includes the maximum damage area. Different processing methods are used for different damage modes. For blades with tip damage, the processing method is to make the processing surface parallel to the axis of the integral bladed disk and perpendicular to the radial direction of the blade. The processing direction is the minimum channel direction between two adjacent blades. For blades with inlet and outlet edge damage, the processing method is to make the processing surface perpendicular to the circumference of the blade. The processing direction is the minimum channel direction between two adjacent blades. Step 2: Use a 3D scanner to perform 3D scanning on the blades and adjacent blades of the overall bladed disk. Through 3D reverse engineering, construct a 3D model of the processed individual blades from the scan data. Step 3: Place the entire bladed disk into the forming cylinder of the printer and fix it. Enlarge the model of the area to be repaired using the theoretical model and then slice the model with a slice thickness of 5μm. Step 4: Start the first motor (201) in drive assembly one, and drive the first threaded rod (3) to rotate through the first gear (202) and the second gear (203), so that the slide (4) moves in the left and right directions. Start the second motor (501) in drive assembly two, and drive the second threaded rod (6) to rotate through the first wrap angle (502), the belt (503) and the second wrap angle (504), so that the slider (7) moves in the front and back directions until the slider (7) is above the repair area. Step 5: Start the third motor (1001) in the rotating device, which drives the internal gear (11) to rotate through the third gear (1002) and the fourth gears (1003) on both sides, so that the powder spraying nozzles (12) and scrapers (13) on both sides are perpendicular to the area to be repaired. Step Six: Start the fourth motor (17) to drive the screw feeder (18) to rotate, and transport the metal powder in the powder storage shell (14) to the conveying pipe (21) through the conveying shell (16). The heating wire (20) between the conveying shell (16) and the heating shell (19) heats the metal powder. The flow meter (22) measures the flowing powder, so that the metal powder is sprayed out from the powder spraying nozzle (12) at a certain flow rate and a certain temperature. Step 7: The slider (7) drives the powder-spreading nozzle (12) and the scraper (13) to move back and forth in a straight line in the area to be repaired. The electric push rod (8) drives the powder-spreading nozzle (12) and the scraper (13) to move in a straight line in the vertical direction to achieve layer-by-layer powder-spreading printing until the repair of a single blade is completed. Step 8: After repair, perform adaptive polishing to meet the surface size requirements.

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