Coordinate measuring machine for integrated fluid blade repair with real-time feedback system

Abstract

The application relates to the field of optical technology, in particular to a three-coordinate instrument of a real-time feedback system in integrated fluid blade repair, which comprises a workbench for loading a blade to be repaired and a measuring head, the measuring head is connected to a left-right moving slide through a measuring head lifting system, the blade to be repaired is horizontally placed on the workbench; one end of the slide is provided with the measuring head lifting system; the other end of the slide is provided with a cloud platform, and a laser detection system is arranged on the cloud platform; the laser detection system comprises a beam splitter and a grating, the beam splitter divides out a measuring beam and a reference beam with an included angle of 5-15 degrees; the measuring beam and the reference beam are projected to the surface of the blade to be repaired. The three-coordinate instrument of the real-time feedback system in integrated fluid blade repair not only shortens the cycle of the whole repair operation, guarantees the precision, improves the processing efficiency, and avoids the blade to be repaired from being scrapped due to excessive polishing.

Description

Technical Field

[0001] This invention relates to the field of optical technology, and in particular to a coordinate measuring machine for a real-time feedback system in integrated fluid blade repair. Background Technology

[0002] An aero-engine is a highly complex and precise thermodynamic machine. Its core working principle is to draw in air and compress and pressurize it, then mix and burn it with fuel in the combustion chamber to produce high-temperature and high-pressure gas. After the gas expands violently, it is ejected at high speed, thereby generating huge thrust to propel the aircraft forward. Among them, the aero-engine guide vanes are key components that efficiently transfer energy by adjusting the airflow direction.

[0003] In the precision manufacturing process of aero-engine guide vanes, a certain machining allowance is reserved on the surface to cope with possible deformation during the rough machining stage and to leave room for finishing during the fine machining. This allows for the elimination of errors and defects through subsequent high-precision inspection and polishing, ultimately ensuring that the product meets the qualified standards.

[0004] Currently, after the machining allowance of the blades is initially ground, they are sent to a coordinate measuring machine for inspection. Based on the measurement report, it is determined whether the blades have residual allowance and the location of the residual allowance. Then, the blades are re-clamped and ground in a targeted manner. After completion, they are re-measured by a coordinate measuring machine. If residual allowance is still detected, the rework and measurement are repeated until the blades are completely qualified before they can enter the assembly stage.

[0005] However, this method has a drawback: the coordinate measuring machine can only measure the blade surface after the grinding process is complete, and cannot provide real-time data feedback during grinding. This can lead to repeated adjustments of the blade due to inadequate grinding, affecting processing efficiency, or over-grinding the blade, resulting in product scrap. Summary of the Invention

[0006] The purpose of this invention is to provide a coordinate measuring machine for a real-time feedback system in integrated fluid blade repair, so as to solve at least one of the above-mentioned technical problems.

[0007] The technical problem solved by the invention can be achieved using the following technical solutions:

[0008] A coordinate measuring machine for real-time feedback system in integrated fluid blade repair. The main body of the coordinate measuring machine includes a worktable for loading the blade to be repaired and a probe. The probe is connected to a slide that moves left and right through a probe lifting system. The blade to be repaired is placed horizontally on the worktable.

[0009] One end of the carriage is equipped with a probe lifting system;

[0010] The other end of the carriage is equipped with a gimbal, and a laser detection system is mounted on the gimbal.

[0011] The laser detection system includes a beam splitter and a grating. The beam splitter separates a measurement beam and a reference beam with an angle between 5 and 15 degrees.

[0012] The measuring beam and the reference beam are projected onto the surface of the blade to be repaired, and the surface of the blade to be repaired is used as a common reflecting surface to form two reflected beams;

[0013] The laser detection system also includes two light-shielding channels that are parallel to the pointing directions of the measurement beam and the reference beam, respectively;

[0014] Optical components are respectively arranged behind the two light-shielding channels. The optical components include optical fibers and converging lenses. The light outlet of the light-shielding channel is directly opposite the light inlet of the optical fiber. The converging lens is located behind the light outlet of the optical fiber and is used to converge the reflected light to the grating to form an interference image.

[0015] The workbench is equipped with a polishing robot;

[0016] During the repair process, the probe scans the blade to be repaired to obtain the positioning coordinates of the remaining material;

[0017] Move the laser detection system to the positioning coordinates so that the measuring beam illuminates the residual amount;

[0018] Start the polishing robot to grind the remaining material;

[0019] Based on the data obtained from the probe, the polishing process is divided into at least three stages;

[0020] After completing one stage, the polishing robot exits, the laser detection system starts measuring and updating the data, and re-divides the polishing degree into at least two stages;

[0021] After completing one of the stages, the polishing robot exits and the laser inspection system remeasures;

[0022] This process is repeated until the polishing is complete.

[0023] In the above design, the blade to be repaired is placed horizontally on the worktable. The polishing robot, laser detection system and coordinate measuring machine are integrated to form a real-time detection and feedback system during the repair process, which includes scanning positioning, staged grinding, in-situ measurement and feedback correction. This not only shortens the cycle of the entire repair operation and improves processing efficiency while ensuring accuracy, but also avoids the blade to be repaired from being scrapped due to excessive grinding.

[0024] Traditional laser inspection systems are high-precision measuring instruments based on the principle of interference. During the scanning process, it is unavoidable that there will be relative displacement and relative angle changes between the laser and the blade surface, at least at the micrometer level. This causes irregular jumps in the interference fringes, making it impossible to scan the true defect area.

[0025] This patent application eliminates the fixed reference mirror in traditional laser detection systems, using the blade surface as the reflecting surface of both the measurement beam and the reference beam. Since the two beams scan synchronously, any common displacement or angular change has a synchronous and equal effect on the two optical paths. Therefore, the optical path difference between the measurement beam and the reference beam changes synchronously and is almost unaffected by slight changes in the position between the laser detection system and the blade surface. This avoids the problem of irregular jumps in interference imaging during the scanning process, making it easier to accurately scan the location of minute damage. Theoretically, the scanning accuracy can be at the level of several micrometers or even nanometers.

[0026] The reference beam and the measurement beam form two reflected beams on the blade surface, which serve as a reference to each other. By comparing and verifying the blade surface at different locations, a self-reference measurement system is formed. This system can accurately and reliably identify interference fringe anomalies caused by minute defects, so as to intuitively and quickly discover damage to the groove bottom surface of the blade crown recess.

[0027] By setting up a light-shielding channel, only reflected light rays that are nearly parallel to the direction of the light-shielding channel can pass through, while light rays with a large angle difference are blocked by the light-shielding channel.

[0028] By setting up optical components, the reflected light rays passing through the light-shielding channel are transmitted through optical fibers. By adjusting the angle, the two reflected light rays pointing in different directions are adjusted to be parallel to each other. Then, they are converged by a converging lens onto the grating to form a clear, stable, and high-contrast interference image. This avoids the situation where two non-parallel reflected light rays cannot form an interference image with blurred texture and reduced contrast after being projected onto the grating.

[0029] Preferably, the optical path of the measuring beam is provided with a light speed adjustment tube, which includes a copper tube, both ends of which are sealed by flat and transparent tempered glass plates; it also includes a gas compressor, the outlet of which is connected to the interior of the light speed adjustment tube, and the inlet of which is connected to a sulfur dioxide gas container; a liquid nitrogen evaporation refrigeration system is also provided, the refrigeration tube of which is wrapped around the copper tube, and a temperature sensor is attached to the inner wall of the copper tube; the temperature sensor is connected to the temperature signal input terminal of the microprocessor of the liquid nitrogen evaporation refrigeration system to realize temperature feedback control.

[0030] In the above design, this invention introduces a liquid nitrogen evaporative cooling system based on temperature sensor feedback control. On the one hand, the liquid nitrogen evaporative cooling system eliminates the refractive index fluctuations caused by the temperature rise and subsequent cooling of the gas due to gas compressor compression. On the other hand, it achieves precise control of the gas refractive index through cooling. Based on the ideal gas law PV=nRT, in a closed pipeline, the volume V and the amount of gas n remain constant. Therefore, the pressure P is directly proportional to the temperature T. By actively cooling the pipeline through the liquid nitrogen evaporative cooling system, according to the above formula, the decrease in temperature T will directly lead to a synchronous decrease in gas pressure P. The gas molecules are more densely distributed in a fixed space, that is, the gas density increases significantly. Since the refractive index of the gas is directly proportional to the gas density, and the control precision of the liquid nitrogen evaporative cooling system is much greater than that of the gas compressor, the fluctuation of the refractive index is controlled within a very small range, thus achieving precise regulation of the gas refractive index.

[0031] Preferably, all copper tubes are covered with a transparent gel layer; the cooling tubes are uniformly disposed outside the transparent gel layer.

[0032] A transparent gel layer is wrapped around the copper tube, filling the gap between the cooling tube and the copper tube. This keeps the copper tube in a uniform and consistent temperature environment, ensuring that the temperature of the sulfur dioxide gas inside the copper tube changes evenly. At the same time, it isolates the copper tube from the external environment, reducing the interference of external temperature fluctuations on the sulfur dioxide inside the copper tube. This allows the present invention to work stably even in ordinary industrial environments, just like in a constant temperature industrial environment.

[0033] Preferably, the light-shielding channel has a straight circular tubular inner wall, and the straight circular tubular inner wall is provided with a black nickel light-absorbing coating. By providing a black nickel light-absorbing coating on the straight circular tubular inner wall, stray light and ambient light are isolated, allowing only reflected light rays that are nearly parallel to the direction of the light-shielding channel to pass through. Light rays with excessively large phase angles are absorbed by the black nickel light-absorbing coating, reducing the influence of stray light and ambient light on interferometric imaging.

[0034] Preferably, the slide is connected to the bridge via a left-right moving component, and the bridge is connected to the worktable via a front-back moving component; the probe lifting system enables the probe to move in the vertical direction, the left-right moving component enables the slide to move in the left-right direction, and the front-back moving component enables the bridge to move in the front-back direction.

[0035] Preferably, the forward and backward moving assembly includes a lead screw rotatably connected to the worktable, a moving block threadedly connected to the lead screw is sleeved on the lead screw, the moving block is slidably connected to the worktable via a slide rail, a servo motor for driving the lead screw to rotate is provided on the worktable, and the bridge is fixed on the moving block; the left and right moving assembly has the same structure as the forward and backward moving assembly.

[0036] Preferably, the polishing robot has a polishing head; a vacuum cleaner is provided next to the polishing robot, the vacuum cleaner includes a hose, the end of the hose is connected to a box, the box has a hollow inner cavity and an opening on one side, called a dust collection box; the dust collection box is nested outside the polishing head, and a brush is provided around the opening end of the dust collection box. When the polishing head contacts the surface of the blade to be repaired, the brush abuts against the surface of the blade to be repaired to form a semi-enclosed dust collection space.

[0037] In summary, the present invention has the following beneficial effects:

[0038] 1. A polishing robot, a laser inspection system, and a coordinate measuring machine form a real-time detection and feedback system for the repair process of fluid blades, which includes scanning positioning, staged polishing, in-situ measurement, and feedback correction. This not only shortens the operation cycle and improves processing efficiency, but also avoids blade scrapping due to over-polishing, achieving efficient repair while ensuring accuracy.

[0039] 2. The traditional reference mirror has been removed, and the blade surface serves as a shared reflective surface for both the measurement beam and the reference beam. By using the two beams to scan synchronously, the optical path difference between the measurement beam and the reference beam is almost unaffected by slight changes in the position between the laser detection system and the blade surface, thus avoiding interference imaging jumps and achieving scanning accuracy at the micrometer or even nanometer level. With the help of the light-shielding channel and optical components, only approximately parallel reflected light is allowed to be transmitted through optical fiber and converged to the grating imaging by the lens, thus constructing a self-reference measurement system. This system can reliably identify interference fringe anomalies caused by tiny defects and quickly and accurately locate damage such as leaf crown dents.

[0040] 3. By coarsely adjusting the pressure and temperature of sulfur dioxide gas inside the copper tube using a gas compressor and a liquid nitrogen evaporation cooling system, precise control of the gas refractive index is achieved. This effectively compensates for optical path differences in different ranges, generating clear, standard, and easily identifiable interference images. This system not only provides a high-contrast benchmark for subsequent scanning and comparison, improving the sensitivity and reliability of laser detection, but also allows for the keen detection of optical path changes caused by minute margins through obvious jumps in interference fringes. Furthermore, the transparent gel layer ensures that the copper tube and gas supply pipe are in a uniform and stable temperature environment, effectively isolating external interference. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the overall structure of the coordinate measuring machine of the real-time feedback system for integrated fluid blade repair according to the present invention;

[0042] Figure 2 This is a schematic diagram of the overall rear view of the coordinate measuring machine of the real-time feedback system for integrated fluid blade repair according to the present invention.

[0043] Figure 3The coordinate measuring machine for the real-time feedback system in the integrated fluid blade repair of the present invention Figure 1 Enlarged structural diagram at point A;

[0044] Figure 4 This is a schematic diagram of the structure of the three-coordinate measuring instrument used to represent the transparent gel layer in the real-time feedback system of the integrated fluid blade repair of the present invention.

[0045] Figure 5 This is a schematic diagram of the three-coordinate measuring machine used to represent the optical fiber in the real-time feedback system of the integrated fluid blade repair of the present invention.

[0046] In the diagram, 1. Workbench; 2. Probe; 3. Carriage; 4. Laser inspection system; 5. Polishing robot; 6. Light-shielding channel; 7. Optical fiber; 8. Converging lens; 9. Copper pipe; 10. Tempered glass plate; 11. Air supply pipe; 12. Transparent gel layer; 13. Cooling pipe; 14. Cable tray; 15. Flexible hose; 16. Dust collection box; 17. Brush. Detailed Implementation

[0047] To make the technical means, creative features, objectives and effects of the invention easier to understand, the invention will be further explained below with reference to specific illustrations.

[0048] refer to Figures 1 to 5 The main body of the coordinate measuring machine includes a worktable 1 for loading the blade to be repaired and a probe 2. The probe 2 is connected to a slide 3 that moves left and right through a probe lifting system. The blade to be repaired is placed horizontally on the worktable 1.

[0049] One end of the slide 3 is equipped with a probe lifting system;

[0050] The other end of the carriage 3 is equipped with a gimbal, and a laser detection system 4 is mounted on the gimbal.

[0051] The laser detection system 4 includes a beam splitter and a grating. The beam splitter splits a measurement beam and a reference beam with an angle between 5 and 15 degrees.

[0052] The measuring beam and the reference beam are projected onto the surface of the blade to be repaired, and the surface of the blade to be repaired is used as a common reflecting surface to form two reflected beams;

[0053] The laser detection system 4 also includes two light-shielding channels 6 that are parallel to the pointing directions of the measurement beam and the reference beam, respectively;

[0054] Optical components are respectively arranged behind the two light-shielding channels 6. The optical components include optical fiber 7 and converging lens 8. The light outlet of the light-shielding channel 6 is directly opposite the light inlet of the optical fiber 7. The converging lens 8 is located behind the light outlet of the optical fiber 7 and is used to converge the reflected light to the grating and form an interference image.

[0055] The workbench 1 is equipped with a polishing robot 5;

[0056] During the repair process, probe 2 scans the blade to be repaired to obtain the positioning coordinates of the remaining material;

[0057] Move the laser detection system 4 to the positioning coordinates so that the measuring beam illuminates the residual amount;

[0058] Start polishing robot 5 to polish the remaining material;

[0059] Based on the data obtained from probe 2, the polishing process is divided into at least three stages;

[0060] After completing one of the stages, the polishing robot 5 exits, the laser detection system 4 starts measuring and updating the data, and re-divides the polishing degree into at least two stages;

[0061] After completing one of the stages, the polishing robot 5 exits and the laser detection system 4 remeasures;

[0062] This process is repeated until the polishing is complete.

[0063] In the above design, the blade to be repaired is placed horizontally on the worktable 1. The polishing robot 5, the laser detection system 4, and the coordinate measuring machine are integrated to form a real-time detection and feedback system during the repair process, which includes scanning positioning, staged grinding, in-situ measurement, and feedback correction. This not only shortens the cycle of the entire repair operation and improves processing efficiency while ensuring accuracy, but also avoids the blade to be repaired from being scrapped due to excessive grinding.

[0064] Traditional laser inspection systems are high-precision measuring instruments based on the principle of interference. During the scanning process, it is unavoidable that relative displacement and relative angle changes will occur between the laser and the blade surface, at least at the micrometer level, resulting in irregular jumps in the interference fringes, which makes it impossible to scan the true defect area.

[0065] This patent application eliminates the fixed reference mirror in the traditional laser detection system 4, and uses the blade surface as the reflecting surface of the measurement beam and the reference beam. Since the two beams scan synchronously, any common displacement or angular change has a synchronous and equal effect on the two optical paths. Therefore, the optical path difference between the measurement beam and the reference beam changes synchronously and is almost unaffected by slight changes in the position between the laser detection system 4 and the blade surface. This avoids the problem of irregular jumps in interference imaging during the scanning process, so as to accurately scan the location of tiny damage. Theoretically, the scanning accuracy can be at the level of several micrometers or even nanometers.

[0066] The reference beam and the measurement beam form two reflected beams on the blade surface, which serve as a reference to each other. By comparing and verifying the blade surface at different locations, a self-reference measurement system is formed. This system can accurately and reliably identify interference fringe anomalies caused by minute defects, so as to intuitively and quickly discover damage to the groove bottom surface of the blade crown recess.

[0067] By setting up the light-shielding channel 6, only reflected light rays that are nearly parallel to the direction of the light-shielding channel 6 can pass through, while light rays with a large angle difference are blocked by the light-shielding channel 6.

[0068] By setting up optical components, the reflected light that passes through the light-shielding channel 6 is transmitted through the optical fiber 7, and after the angle is adjusted, it is converged to the grating through the converging lens 8 to form an interference image.

[0069] The optical path of the measuring beam is equipped with a light speed adjustment tube, which includes a copper tube 9, both ends of which are sealed by a flat and transparent tempered glass plate 10; it also includes a gas compressor, the outlet of which is connected to the interior of the light speed adjustment tube, and the inlet of which is connected to a sulfur dioxide gas container; a liquid nitrogen evaporation refrigeration system is also provided, the refrigeration tube 13 of which is wrapped around the copper tube, and a temperature sensor is attached to the inner wall of the copper tube; the temperature sensor is connected to the temperature signal input terminal of the microprocessor of the liquid nitrogen evaporation refrigeration system to realize temperature feedback control.

[0070] In the above design, sulfur dioxide is pumped into or extracted into the copper tube 9 by a gas compressor, changing the pressure of the sulfur dioxide gas in the copper tube 9, adjusting its refractive index, and then precisely adjusting the optical path of the measuring beam, thereby adjusting the optical path difference to produce clear and stable interference fringes.

[0071] This invention introduces a liquid nitrogen evaporative cooling system based on temperature sensor feedback control. On the one hand, the liquid nitrogen evaporative cooling system eliminates the refractive index fluctuations caused by the temperature rise and subsequent cooling of the gas due to gas compression by the gas compressor. On the other hand, it achieves precise control of the gas refractive index through cooling. Based on the ideal gas law PV=nRT, in a closed pipeline, the volume V and the amount of gas n remain constant. Therefore, the pressure P is directly proportional to the temperature T. By actively cooling the pipeline through the liquid nitrogen evaporative cooling system, according to the above formula, the decrease in temperature T will directly lead to a synchronous decrease in gas pressure P. The gas molecules are more densely distributed in a fixed space, that is, the gas density increases significantly. Since the refractive index of the gas is directly proportional to the gas density, and the control precision of the liquid nitrogen evaporative cooling system is much greater than that of relying on the gas compressor, the fluctuation of the refractive index is controlled within a very small range, thus achieving precise regulation of the gas refractive index.

[0072] Based on this, a high-contrast benchmark is provided for subsequent scanning and comparison, improving the sensitivity and reliability of the laser detection system. When the measurement beam scans to a small margin, the resulting minute optical path change will be extremely sensitive and obvious, manifesting as a sharp jump, bending or contrast loss of interference fringes. Combined with the design of the existing high-precision gas compressor and liquid nitrogen evaporation refrigeration system, nanometer-level optical path difference precision adjustment is achieved. Moreover, the adjustment process is highly simple and quick, requiring no complicated operation, and ordinary staff can easily achieve precise control.

[0073] Preferably, all copper tubes 9 are covered with a transparent gel layer 12; cooling tubes 13 are uniformly arranged outside the transparent gel layer 12.

[0074] A transparent gel layer 12 is wrapped around the copper tube and fills the gap between the cooling tube 13 and the copper tube 9, so that the copper tube 9 is in a uniform and consistent temperature environment, and the temperature of the sulfur dioxide gas inside the copper tube 9 changes uniformly. At the same time, it is isolated from the external environment, reducing the interference of external temperature fluctuations on the sulfur dioxide inside the copper tube 9. This allows the present application to work stably even in ordinary industrial environments, just like in constant temperature industrial environments.

[0075] The light-shielding channel 6 has a straight circular tube inner wall, and the straight circular tube inner wall is coated with a black nickel light-absorbing coating. By setting a black nickel light-absorbing coating on the straight circular tube inner wall, stray light and ambient light are isolated, allowing only reflected light rays that are nearly parallel to the direction of the light-shielding channel 6 to pass through. Light rays with excessively large phase angles are absorbed by the black nickel light-absorbing coating, reducing the influence of stray light and ambient light on interference imaging.

[0076] The slide 3 is connected to the bridge 14 via a left-right moving component, and the bridge 14 is connected to the workbench 1 via a front-back moving component. The probe 2 lifting system enables the probe 2 to move in the vertical direction, the left-right moving component enables the slide 3 to move in the left-right direction, and the front-back moving component enables the bridge 14 to move in the front-back direction.

[0077] The forward and backward moving assembly includes a lead screw rotatably connected to the worktable 1. A moving block threadedly connected to the lead screw is provided on the sleeve of the lead screw. The moving block is slidably connected to the worktable 1 via a slide rail. A servo motor that drives the lead screw to rotate is provided on the worktable 1. The bridge frame 14 is fixed on the moving block. The left and right moving assembly has the same structure as the forward and backward moving assembly.

[0078] The polishing robot 5 has a polishing head; a vacuum cleaner is arranged beside the polishing robot 5, the vacuum cleaner including a flexible hose 15, the end of which is connected to a box with a hollow inner cavity and an opening on one side, called a dust collection box 16; the dust collection box 16 is nested outside the polishing head, and a brush 17 is arranged around the open end of the dust collection box 16. When the polishing head contacts the surface of the blade to be repaired, the brush 17 abuts against the surface of the blade to be repaired, so as to form a semi-enclosed dust collection space. The dust collection space allows the dust generated by polishing to directly enter the flexible hose 15 and will not overflow the dust collection box through the brush, thus not affecting the laser detection system 4.

[0079] In use, the blade is placed horizontally and fixed on the worktable 1. The probe 2 scans the blade to be repaired by the front-to-back moving component, the left-to-right moving component and the probe lifting system. The probe obtains the positioning coordinates of the residual amount. Then the laser detection system 4 moves to the positioning coordinates so that the measuring beam irradiates the residual amount. The pressure and temperature of the sulfur dioxide gas in the copper tube 9 are adjusted by the gas compressor and the liquid nitrogen evaporation cooling system to obtain a clear and standard interference image. Based on the data obtained by the probe 2, the polishing degree is divided into at least three stages.

[0080] The polishing robot 5 and the vacuum cleaner are turned on. The polishing robot 5 polishes the remaining material on the blade. At the same time, the brush 17 comes into contact with the surface of the blade to be repaired, forming a semi-enclosed dust collection space. The dust generated during the polishing process enters the hose 15 directly under the action of the vacuum cleaner. After completing one stage, the polishing robot 5 withdraws, exposing the remaining material. The laser detection system 4 starts measuring and updating the data, and re-divides the polishing degree into at least two stages.

[0081] After completing one of the stages, the polishing robot 5 exits and the laser detection system 4 remeasures;

[0082] This process is repeated until the polishing is complete.

[0083] The foregoing has shown and described the basic principles, main features, and advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection of the invention is defined by the appended claims and their equivalents.

Claims

1. A coordinate measuring machine for a real-time feedback system in integrated fluid blade repair, the main body of the coordinate measuring machine comprising a blade loading table (1) and a probe (2), the probe (2) being connected to a slide (3) via a probe lifting system, characterized in that, The blades are placed horizontally on the workbench (1); The slide (3) is equipped with a probe lifting system at one end; The other end of the carriage (3) is equipped with a gimbal, and a laser detection system (4) is mounted on the gimbal. The laser detection system (4) includes a beam splitter and a grating. The beam splitter splits a measurement beam and a reference beam with an angle between 5 and 15 degrees. The measuring beam and the reference beam are projected onto the blade surface, and the blade surface is used as a common reflecting surface to form two reflected beams; The laser detection system (4) also includes two light-shielding channels (6) that are parallel to the pointing directions of the measurement beam and the reference beam, respectively. Optical components are respectively provided behind the two light-shielding channels (6). The optical components include optical fiber (7) and converging lens (8). The light outlet of the light-shielding channel (6) is directly opposite the light inlet of the optical fiber (7). The converging lens (8) is located behind the light outlet of the optical fiber (7) and is used to converge the reflected light to the grating and form an interference image. A polishing robot (5) is mounted on the workbench (1); During the repair process, the probe (2) scans the blade to obtain the positioning coordinates of the remaining amount; Move the laser detection system (4) to the positioning coordinates so that the measuring beam illuminates the residual margin. Start the polishing robot (5) to polish the remaining material; Based on the data obtained from the probe (2), the polishing degree is divided into at least three stages; After completing one of the stages, the polishing robot (5) exits, the laser detection system (4) starts measuring and updating the data, and re-divides the polishing degree into at least two stages; After completing one of the stages, the polishing robot (5) exits and the laser detection system (4) remeasures; This process is repeated until the polishing is complete.

2. The coordinate measuring machine of the real-time feedback system for integrated fluid blade repair according to claim 1, characterized in that: The optical path of the measuring beam is provided with a light speed adjustment tube, which includes a copper tube (9) and the two ends of the copper tube (9) are sealed by a flat and transparent tempered glass plate (10). It also includes a gas compressor, the outlet of which is connected to the interior of the light speed adjustment tube, and the inlet of which is connected to a sulfur dioxide gas container. A liquid nitrogen evaporation refrigeration system is also provided. The refrigeration pipe (13) of the liquid nitrogen evaporation refrigeration system is wrapped around the copper pipe (9), and a temperature sensor is attached to the inner wall of the copper pipe (9). The temperature sensor is connected to the temperature signal input terminal of the microprocessor of the liquid nitrogen evaporation refrigeration system to realize feedback control of the temperature.

3. The coordinate measuring machine of the real-time feedback system for integrated fluid blade repair according to claim 2, characterized in that: The copper tubes (9) are all covered with a transparent gel layer (12). The cooling tube (13) is uniformly disposed outside the transparent gel layer (12).

4. The coordinate measuring machine of the real-time feedback system for integrated fluid blade repair according to claim 1, characterized in that: The light-shielding channel (6) has a straight circular tube inner wall, and the straight circular tube inner wall is provided with a black nickel light-absorbing coating.

5. The coordinate measuring machine of the real-time feedback system for integrated fluid blade repair according to claim 1, characterized in that: The carriage (3) is connected to the bridge (14) via a left-right moving component, and the bridge (14) is connected to the worktable (1) via a front-back moving component. The probe (2) lifting system enables the probe (2) to move in the vertical direction, the left and right moving component enables the carriage (3) to move in the left and right direction, and the front and back moving component enables the bridge (14) to move in the front and back direction.

6. The coordinate measuring machine of the real-time feedback system for integrated fluid blade repair according to claim 5, characterized in that: The forward and backward moving assembly includes a lead screw rotatably connected to the worktable (1), a moving block threadedly connected to the lead screw is provided on the sleeve of the lead screw, the moving block is slidably connected to the worktable (1) via a slide rail, the worktable (1) is provided with a servo motor that drives the lead screw to rotate, and the bridge frame (14) is fixed on the moving block. The left-right movement component has the same structure as the forward-backward movement component.

7. The coordinate measuring machine of the real-time feedback system for integrated fluid blade repair according to claim 6, characterized in that: The polishing robot (5) has a polishing head; A vacuum cleaner is provided on the side of the polishing robot (5). The vacuum cleaner includes a hose (15) and a box is connected to the end of the hose (15). The box has a hollow inner cavity and an opening on one side, and is called a vacuum box (16). The dust collection box (16) is nested outside the grinding head, and the opening end of the dust collection box (16) is provided with a brush (17). When the grinding head contacts the surface of the blade to be repaired, the brush (17) abuts against the surface of the blade to be repaired to form a semi-closed dust collection space.

Images