Ultrasonic nondestructive testing device for aeronautical composite material part

Abstract

According to the ultrasonic non-destructive testing device for the aviation composite material part, a tester can laterally lock the side edge of a sample through the positioning mechanism so as to meet the requirement for detecting a special-shaped or thicker sample, and meanwhile, the bottom of the sample can be locked in a negative pressure adsorption mode by reversely driving the positioning mechanism so as to meet the requirement for detecting the special-shaped or thicker sample. According to the sample table for the ultrasonic scanning microscope, the requirement that the sample is flat or is prone to being damaged due to extrusion is met, and after locking is completed, the detection face of the sample is in an unshielded state, so that the ultrasonic scanning microscope can comprehensively detect the sample, and the problems that an existing sample table for the ultrasonic scanning microscope shields the sample, and ultrasonic nondestructive testing errors of the sample are increased are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation composite material detection, in particular to an ultrasonic non-destructive detection device for aviation composite material parts. Background Art

[0002] Aerospace composites are high-performance materials used in aircraft, formed by combining two or more heterogeneous, shaped, and structured materials through specialized molding processes. Carbon fiber-reinforced composites, metal-matrix composites, and ceramic-matrix composites are common aerospace composites. Currently, ultrasonic nondestructive testing (NDT) of aerospace composites is often performed using an ultrasonic scanning microscope equipped with a sample stage.

[0003] Currently, a Chinese patent discloses a sample stage for an ultrasonic scanning microscope (authorization publication number CN111122711 B). The sample stage for an ultrasonic scanning microscope according to the present invention includes a sample holder equipped with several adjustable sample clamps for clamping and securing samples of varying structures. Each adjustable sample clamp includes a third slider slidably connected to the sample holder, a clamping plate positioned above the third slider, and a screw. The clamping plate has a through hole, and the third slider has a threaded hole. The lower end of the screw passes through the through hole and is threadedly connected to the threaded hole. Therefore, when the sample to be tested is a regular sheet structure or a plate structure of low or medium thickness, the third slider is adjusted to a suitable position, and each sample clamp is adjusted to clamp and fix the object to be tested by utilizing the gap formed by each clamp and each third slider; when the sample is a plate structure or an irregular structure with a higher thickness, the third slider is adjusted to a suitable position, and then the angle of each clamp is rotated so that it is respectively abutted and fixed against the outer wall of each object to be tested, and then the screws are tightened to fix the clamp, thereby achieving the fixation of the plate structure or irregular structure to be tested.

[0004] Since the above-mentioned device uses a bolt-down pressure structure to fix the sample on the sample table, although this can effectively lock the sample, it will also block part of the sample, resulting in the inability of the ultrasonic scanning microscope to fully scan the test sample, increasing the detection error of ultrasonic non-destructive testing of aviation composite parts. Summary of the Invention

[0005] The invention provides an ultrasonic nondestructive testing device for aviation composite material parts, which aims to solve the problem that a sample stage used in an existing ultrasonic scanning microscope blocks the sample, thereby increasing the error in ultrasonic nondestructive testing of the sample.

[0006] The present invention provides an ultrasonic nondestructive testing device for aviation composite parts, comprising: a mounting plate 100 and a positioning mechanism 400;

[0007] The mounting plate 100 is fixed in the water tank of the ultrasonic scanning microscope. The top of the mounting plate 100 is provided with uniformly distributed piston cavities 110, and the bottom is provided with a guide cavity 120 connected to the piston cavity 110.

[0008] The positioning mechanism 400 includes: a waterproof servo motor 410, a threaded column 420, a positioning frame 430, a guide rod 440, a sliding frame 450, an adjustment plate 460, and a piston rod 470;

[0009] The waterproof servo motor 410 is mounted on the mounting plate 100 . The end of the output shaft of the waterproof servo motor 410 is fixedly connected to a threaded column 420 . The threaded column 420 rotates and penetrates the mounting plate 100 .

[0010] An adjustment plate 460 is disposed in the guide cavity 120 below the mounting plate 100 , and a piston rod 470 is provided on the adjustment plate 460 and inserted into the piston cavity 110 ; slide frames 450 are provided on both sides below the adjustment plate 460 , and an inclined guide channel 451 is provided on the slide frame 450 ; a guide rod 440 is provided in the guide channel 451 , and a positioning frame 430 is fixedly connected to the guide rod 440 , and the positioning frame 430 is threadedly connected to the threaded column 420 . When the threaded column 420 rotates, the positioning frame 430 is driven to move along the threaded column 420 , thereby driving the guide rod 440 to move in the guide channel 451 , thereby driving the piston rod 470 on the adjustment plate 460 to move in the piston cavity 110 ;

[0011] When an aviation composite material part is placed on the piston cavity 110 , the waterproof servo motor 410 drives the piston rod 470 to separate from the piston cavity 110 , generating negative pressure to absorb the aviation composite material part.

[0012] Optionally, the ultrasonic nondestructive testing device for aviation composite parts further includes: a connecting seat 200 and an angle adjustment mechanism 300;

[0013] Both ends of the mounting plate 100 are rotatably connected to a connecting seat 200, which is locked in the water tank of the ultrasonic scanning microscope. An angle adjustment mechanism 300 fixedly connected to the mounting plate 100 is installed on the surface of one of the connecting seats 200.

[0014] Optionally, the angle adjustment mechanism 300 includes a waterproof stepping motor, and the end of the output shaft of the waterproof stepping motor and one of the side ends of the mounting plate 100 are fixedly connected to a pulley, and the two pulleys are connected by a belt drive, thereby driving the mounting plate 100 to rotate around an axis along the length direction.

[0015] Optionally, the inner frame size of the positioning frame 430 is larger than the size of the piston cavity 110 of the mounting plate 100 .

[0016] Optionally, a positioning plate 4100 is fixedly connected to the top of the side of the mounting plate 100 close to the waterproof servo motor 410 , and is used to clamp the aviation composite material part with the positioning frame 430 .

[0017] Optionally, the inner diameter of the guide rod 440 to which the sliding frame 450 is connected, the inner diameter of the guide channel 451 and the diameter of the guide rod 440 are all the same;

[0018] There are two sliding frames 450 , which are symmetrically distributed on both sides of the axis of the threaded column 420 .

[0019] Optionally, the vertical cross-sectional shape of the piston chamber 110 is a cross, and the vertical cross-sectional shape of the piston rod 470 is a T-shaped. The maximum diameter of the piston rod 470 arranged inside the piston chamber 110 is larger than the inner diameter of the upper and lower openings of the piston chamber 110, which can confine the piston rod 470 inside the piston chamber 110 and prevent the piston rod 470 from loosening.

[0020] Optionally, a filter screen 490 is embedded in the interior of the piston chamber 110 , and the top of the filter screen 490 is flush with the upper opening of the piston chamber 110 , and the filter screen 490 is always on the piston rod 470 .

[0021] Optionally, the positioning mechanism 400 further includes: an exhaust assembly 480 , the exhaust assembly 480 including a round box 481 fixedly connected to the other end of the mounting plate 100 ;

[0022] The top and bottom ends of the round box 481 are both provided with a liquid guide hole 4811. The inside of the round box 481 is rotatably connected to a water wheel 482 fixedly connected to the threaded column 420. The top of the upper liquid guide hole 4811 is fixedly connected and connected to a universal bamboo tube 483; the universal bamboo tube 483 includes a first ball seat 4831, a number of no less than ten second ball seats 4832 and a flat nozzle 4833. The first ball seat 4831 is fixedly connected and connected to the top of the upper liquid guide hole 4811, the second ball seat 4832 and the flat nozzle 4833 One end of each of the round box 481 is fixedly connected and communicates with a ball sleeve 4834. The lowest ball sleeve 4834 is rotatably connected to the interior of the first ball seat 4831, and the remaining ball sleeves 4834 are rotatably connected to the interior of the adjacent second ball seat 4832. The two liquid guide holes 4811 are symmetrically distributed on the upper and lower sides of the axis of the round box 481. The two liquid guide holes 4811 are both located on the same side of the axis of the water wheel 482, which enables the water wheel 482 to guide the fluid coupling agent in a single direction to ensure the flow rate of the fluid coupling agent. The first ball seat 4831 and the second ball seat An O-ring 4835 is embedded in the inner side of each ball seat 4832, and the O-ring 4835 is sleeved on the surface of the adjacent ball sleeve 4834. This not only increases the sealing between the first ball seat 4831, the second ball seat 4832 and the ball sleeve 4834, thereby reducing the probability of leakage of the fluid coupling agent during the flow inside the first ball seat 4831, the second ball seat 4832 and the ball sleeve 4834, but also increases the friction between the first ball seat 4831, the second ball seat 4832 and the ball sleeve 4834. After the inspector adjusts the spatial position of flat nozzle 4833, the friction between first ball seat 4831 and second ball seat 4832, through the O-ring 4835, automatically locks flat nozzle 4833 in place, achieving a good locking effect. The downward opening of ball sleeve 4834 is provided with a guide slope 48341. The vertical cross-section of guide slope 48341 is an isosceles trapezoid. This reduces the resistance of the fluid couplant entering the flow channel inside ball sleeve 4834, further ensuring the flow rate of the fluid couplant.

[0023] Since bubbles are easily trapped at the bottom of a flat-bottomed ultrasonic receiver every time it is immersed in the fluid coupling agent, the inspector needs to use a dropper or other liquid spraying device to push away the bubbles at the bottom of the ultrasonic receiver every time it is immersed in the fluid coupling agent to improve the receiving accuracy of the ultrasonic receiver.

[0024] When the exhaust assembly 480 is in use, the inspector can rotate the corresponding ball sleeve 4834 to direct the opening of the flat nozzle 4833 toward the ultrasonic receiver and into the height of the fluid coupling agent. Then, while the inspector controls the waterproof servo motor 410 to fix the sample, the waterproof servo motor 410 synchronously drives the water wheel 482 to rotate through the threaded column 420. The water wheel 482 stirs the fluid coupling agent inside the round box 481 and pushes the fluid coupling agent toward the liquid guide hole 4811 in the direction of the fluid coupling agent flow. At this time, the fluid coupling agent inside the universal bamboo tube 483 flows into the interior of the round box 481 or is discharged from the universal bamboo tube 483. This can affect the flow of fluid coupling agent at the same height as the opening of the flat nozzle 4833 and form a laminar flow at that height. While passing through the flat bottom of the ultrasonic receiver, the fluid coupling agent can also entrain bubbles at the flat bottom of the ultrasonic receiver and discharge them. This eliminates the step of the inspector discharging bubbles at the flat bottom of the ultrasonic receiver after the ultrasonic receiver is immersed in the fluid coupling agent, thereby improving the efficiency of ultrasonic non-destructive testing of samples.

[0025] The present invention provides an ultrasonic nondestructive testing device for aviation composite parts. The testing personnel can not only laterally lock the side of the sample through the positioning mechanism to meet the needs of testing special-shaped or thick samples, but also reversely drive the positioning mechanism to lock the bottom of the sample by negative pressure adsorption to meet the needs of flat samples or samples that are easily damaged by squeezing. After locking is completed, the testing surface of the sample is in an unobstructed state, allowing the ultrasonic scanning microscope to fully inspect the sample. This effectively solves the problem of the sample stage of the existing ultrasonic scanning microscope blocking the sample and increasing the error of the ultrasonic nondestructive testing of the sample.

[0026] The exhaust assembly design allows the tester to fix the sample while the waterproof servo motor drives the exhaust assembly through the threaded column to generate laminar flow near the flat bottom of the ultrasonic receiver. This allows the fluid coupling agent to carry away bubbles at the flat bottom of the ultrasonic receiver while passing through the flat bottom of the ultrasonic receiver. This eliminates the need for the tester to exhaust bubbles at the flat bottom of the ultrasonic receiver after the ultrasonic receiver is deeply immersed in the fluid coupling agent, thereby improving the efficiency and accuracy of ultrasonic non-destructive testing of samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is a structural schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the overall structure of the present invention installed in an ultrasonic scanning microscope;

[0030] Figure 3 It is a cross-sectional schematic diagram of the overall structure of the present invention;

[0031] Figure 4 It is a structural schematic diagram of a local structure in the present invention;

[0032] Figure 5 It is a cross-sectional schematic diagram of a local structure in the present invention;

[0033] Figure 6 It is a structural diagram of a part of the positioning mechanism in the present invention;

[0034] Figure 7 Schematic diagram of the structure of the exhaust assembly in the present invention;

[0035] Figure 8 Schematic cross-sectional view of the universal bamboo tube of the present invention;

[0036] Figure 9 A schematic cross-sectional view of a portion of the exhaust assembly of the present invention;

[0037] Description of reference numerals:

[0038] 100. Mounting plate; 110. Piston chamber; 120. Guide chamber; 200. Connecting seat; 300. Angle adjustment mechanism; 400. Positioning mechanism; 410. Waterproof servo motor; 420. Threaded column; 430. Positioning frame; 440. Guide rod; 450. Slide frame; 451. Guide channel; 460. Adjustment plate; 470. Piston rod; 480. Exhaust assembly; 481. Round box; 4811. Liquid guide hole; 482. Water wheel; 483. Universal bamboo tube; 4831. First ball seat; 4832. Second ball seat; 4833. Flat nozzle; 4834. Ball sleeve; 48341. Guide slope; 4835. O-ring; 490. Filter; 4100. Positioning plate. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. 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 ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0040] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present invention are for illustrative purposes only and do not represent the only implementation method.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0042] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] Unless otherwise defined, all technical and scientific terms used in the present description have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this description are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used in this description includes any and all combinations of one or more of the associated listed items.

[0044] The present invention provides an ultrasonic nondestructive testing device for aviation composite parts, comprising a mounting plate, both ends of which are rotatably connected to connecting seats, a surface of one of the connecting seats being mounted with an angle adjustment mechanism fixedly connected to the mounting plate, and a surface of the mounting plate being mounted with a positioning mechanism.

[0045] In one embodiment, the top of the mounting plate is provided with a uniformly distributed piston cavity, the bottom of the mounting plate is provided with a guide cavity connected to the piston cavity, the positioning mechanism includes a waterproof servo motor fixedly connected to one end of the mounting plate, the end of the output shaft of the waterproof servo motor is fixedly connected to a threaded column rotatably connected to the mounting plate, the surface of the threaded column is threadedly connected to a positioning frame slidably connected to the guide cavity, one end of the positioning frame is fixedly connected to a guide rod, the surface of the guide rod is slidably connected to a sliding frame slidably connected to the guide cavity, the sliding frame is provided with an inclined upward guide channel toward the vertical inner wall of the positioning frame, the top of the sliding frame is fixedly connected to an adjustment plate slidably connected to the guide cavity, the top of the adjustment plate is fixedly connected to piston rods uniformly distributed and slidably connected to adjacent piston cavities, and the top of the mounting plate is fixedly connected to a positioning plate.

[0046] In one embodiment, the positioning mechanism also includes an exhaust assembly, which includes a round box fixedly connected to the other end of the mounting plate, and liquid guide holes are provided at both the top and bottom ends of the round box. The interior of the round box is rotatably connected to a water wheel fixedly connected to a threaded column, and the top of the liquid guide hole above is fixedly connected and connected to a universal bamboo tube.

[0047] In one embodiment, the universal bamboo tube includes a first ball seat, no less than ten second ball seats and a flat nozzle, the first ball seat is fixedly connected and connected to the top of the liquid guide hole above, the second ball seat and one end of the flat nozzle are fixedly connected and connected to a ball sleeve, the lowest ball sleeve is rotatably connected to the inside of the first ball seat, and the remaining ball sleeves are respectively rotatably connected to the inside of the adjacent second ball seats.

[0048] In one embodiment, the two liquid guide holes are symmetrically distributed on the upper and lower sides of the axis of the round box, and the two liquid guide holes are both arranged on the same side of the axis of the water wheel.

[0049] In one embodiment, O-rings are embedded and installed on the inner sides of the first ball seat and the second ball seat, and the O-rings are sleeved on the surfaces of the adjacent ball seats.

[0050] In one embodiment, the downward opening of the ball sleeve is provided with a guide slope, and the vertical cross-section of the guide slope is an isosceles trapezoid.

[0051] In one embodiment, the inner diameter of the sliding frame, the inner diameter of the guide channel and the diameter of the guide rod are all the same, and the partial vertical cross-section of the guide rod disposed inside the sliding frame is circular.

[0052] In one embodiment, the horizontal cross-section of the guide rod is T-shaped, and the number of the sliding frames is two, and the two sliding frames are symmetrically distributed on both sides of the axis of the threaded column.

[0053] In one embodiment, the vertical cross-section of the piston cavity is a cross, the vertical cross-section of the piston rod is a T-shape, and the maximum diameter of the piston rod disposed inside the piston cavity is larger than the inner diameters of the upper and lower openings of the piston cavity.

[0054] In one embodiment, a filter screen is embedded in the interior of the piston chamber, the top of the filter screen is flush with the upper opening of the piston chamber, and the filter screen is always above the piston rod.

[0055] Based on this, it is necessary to provide an ultrasonic nondestructive testing device for aviation composite parts to address the problem that the sample stage used in the existing ultrasonic scanning microscope blocks the sample, which increases the error of ultrasonic nondestructive testing of the sample.

[0056] The following combination Figure 1 - Figure 9 The ultrasonic nondestructive testing device for aviation composite parts of the present invention is described.

[0057] like Figure 1 As shown, in one embodiment, an ultrasonic nondestructive testing device for aviation composite parts includes a mounting plate 100, with connecting seats 200 rotatably connected to both ends of the mounting plate 100, an angle adjustment mechanism 300 fixedly connected to the mounting plate 100 is mounted on the surface of one of the connecting seats 200, and a positioning mechanism 400 is mounted on the surface of the mounting plate 100;

[0058] When the inspector needs to install the sample platform into the water tank of the ultrasonic scanning microscope, the inspector can lock the two connecting seats 200 in the water tank by means of snap connection or bolt connection according to the existing method;

[0059] The angle adjustment mechanism 300 includes a waterproof stepper motor fixedly connected to the surface of one of the connecting seats 200. The end of the output shaft of the waterproof stepper motor and one of the side ends of the mounting plate 100 are fixedly connected with a pulley. The two pulleys are connected by a belt drive. When the inspector needs to adjust the inspection angle of the sample, the inspector only needs to manually control the waterproof stepper motor to rotate the specified angle. The waterproof stepper motor drives the pulley connected to it to rotate the specified angle. The pulley drives another pulley to rotate the specified angle through the belt. The other pulley drives the mounting plate 100 and the sample to rotate the specified angle, so that the sample can be inspected at the corresponding angle.

[0060] Common ultrasonic scanning microscopes include the following structures:

[0061] 1. Ultrasonic transmitting and receiving system

[0062] Ultrasonic transmitter: Located on the side or bottom of the tank, it transmits ultrasonic waves to the sample. The transmitter is usually made of transducer materials such as piezoelectric crystals, which can convert electrical energy into mechanical energy (ultrasonic waves).

[0063] Ultrasonic receiver: Located on the other side of the tank or above it, it receives the ultrasonic signal reflected from the sample. The receiver is also made of transducer materials such as piezoelectric crystals, which can convert mechanical energy (ultrasonic waves) into electrical energy for subsequent processing.

[0064] 2. Scanning and control system

[0065] Scanning system: This system consists of a motor-driven scanner and a sophisticated control system. The scanner moves the ultrasonic transmitter and receiver (or sample) within the tank to fully scan the area to be inspected. The control system precisely controls parameters such as scanning speed, scanning range, and scanning step size.

[0066] Control system: This is typically composed of a computer or other intelligent device that receives and processes signals from the ultrasound receiver and controls the operation of the scanning system. The control system also enables real-time image display, storage, and analysis.

[0067] 3. Image Display and Processing System

[0068] Image display system: This system converts the received ultrasonic signals into visual images, allowing users to observe and analyze the internal structure of the sample. The display system typically includes a high-resolution display and image processing software.

[0069] Image processing system: It can enhance, filter, detect edges and perform other processing on the collected ultrasonic images to improve the clarity and contrast of the images. In addition, the image processing system can also realize functions such as 3D reconstruction and defect recognition.

[0070] 4. Sink

[0071] Function: The water tank is a key component in ultrasonic scanning microscopes. It holds the sample to be examined and the ultrasonic fluid couplant. The fluid couplant fills the tiny gap between the sample and the ultrasonic probe, reducing reflection and scattering of sound waves, thereby improving the clarity of the ultrasonic image.

[0072] Structural Features: The water tank is usually made of transparent material to facilitate observation of the sample and the propagation of ultrasonic waves. Its size and shape are designed according to specific application requirements to ensure that it can accommodate samples of various sizes.

[0073] It should be noted that the ultrasonic transmitter, ultrasonic receiver, scanning system, control system, image display system, image processing system and water tank in the above description are all relatively mature devices in existing technology applications. The specific models can be selected according to actual needs. At the same time, the ultrasonic transmitter, ultrasonic receiver, scanning system, control system, image display system and image processing system can be powered by a built-in power supply or by AC power. The specific power supply method is selected according to the situation. Therefore, the process of ultrasonic non-destructive testing of samples by the inspector through the ultrasonic scanning microscope is the same as the existing public process and will not be repeated here.

[0074] like Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the top of the mounting plate 100 is provided with piston cavities 110 distributed evenly, and the bottom of the mounting plate 100 is provided with a guide cavity 120 connected to the piston cavity 110. The positioning mechanism 400 includes a waterproof servo motor 410 fixedly connected to one end of the mounting plate 100, and the end of the output shaft of the waterproof servo motor 410 is fixedly connected to a threaded column 420 rotatably connected to the mounting plate 100. The surface of the threaded column 420 is threadedly connected to a positioning frame 430 slidably connected to the guide cavity 120. One end of the positioning frame 430 is fixed. It is connected to a guide rod 440, the surface of which is slidably connected to a sliding frame 450 that is slidably connected to the guide cavity 120, the sliding frame 450 is provided with an upward inclined guide channel 451 toward the vertical inner wall of the positioning frame 430, the top of the sliding frame 450 is fixedly connected to an adjustment plate 460 that is slidably connected to the guide cavity 120, the top of the adjustment plate 460 is fixedly connected to piston rods 470 that are evenly distributed and slidably connected to adjacent piston cavities 110, and the top of the mounting plate 100 is fixedly connected to a positioning plate 4100.

[0075] When the inspector needs to inspect a special-shaped or thick sample, the inspector first places the sample on top of the mounting plate 100 and fits one end of the sample to the positioning plate 4100. Then, the inspector manually controls the waterproof servo motor 410 to rotate a specified number of turns in the corresponding direction. The waterproof servo motor 410 drives the threaded column 420 to rotate a specified number of turns. The threaded column 420 drives the positioning frame 430 to approach the sample at a constant speed along the guide cavity 120 through rotation until the positioning frame 430 cooperates with the positioning plate 4100 to firmly clamp the sample. Since the positioning frame 430 and the positioning plate 4100 are both on the side of the sample, the inspection surface of the sample is in an unobstructed state, so that the ultrasonic scanning microscope can fully inspect the sample.

[0076] When the inspector needs to flatten the sample or the sample that is easily damaged by squeezing, the inspector first places the sample on the top of the mounting plate 100 and fits one end of the sample to the positioning plate 4100. Then, the inspector manually controls the waterproof servo motor 410 to rotate in the reverse direction for a specified number of turns. The waterproof servo motor 410 drives the threaded column 420 to rotate in the reverse direction. The threaded column 420 drives the positioning frame 430 away from the sample through rotation. The positioning frame 430 drives the guide rod 440 to slide in the direction of the guide channel 451. When the guide rod 440 slides into the guide channel 451, the guide rod 4 40 drives the sliding frame 450 to slide downward along the guide cavity 120 through the guide channel 451, the sliding frame 450 drives the adjustment plate 460 to move downward, and the adjustment plate 460 drives all the piston rods 470 to move downward along the piston cavity 110. Since the bottom of the sample covers and blocks the corresponding piston cavity 110, the blocked piston cavity 110 generates negative pressure under the downward movement of the piston rod 470. The negative pressure can tightly adsorb the sample on the top of the mounting plate 100. At this time, the detection surface of the sample is in an unobstructed state, so that the ultrasonic scanning microscope can fully detect the sample.

[0077] like Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the inner diameter of the sliding frame 450, the inner diameter of the guide channel 451 and the diameter of the guide rod 440 are all the same, the local vertical cross-section of the guide rod 440 arranged on the inner side of the sliding frame 450 is circular, the horizontal cross-section of the guide rod 440 is T-shaped, the number of sliding frames 450 is two, and the two sliding frames 450 are symmetrically distributed on both sides of the axis of the threaded column 420, which can make the guide rod 440 more stable to drive the piston rod 470 to rise and fall, so that the piston rod 470 can cooperate with the piston chamber 110 to normally adsorb or unlock the sample; the vertical cross-section of the piston chamber 110 is cross-shaped, and the vertical cross-section of the piston rod 470 is T-shaped. The maximum diameter of the piston rod 470 arranged inside the piston chamber 110 is larger than the inner diameter of the upper and lower openings of the piston chamber 110, which can confine the piston rod 470 inside the piston chamber 110 to prevent the piston rod 470 from loosening.

[0078] like Figure 4 and Figure 5 As shown, a filter screen 490 is embedded in the interior of the piston chamber 110. The top of the filter screen 490 is flush with the opening above the piston chamber 110. The filter screen 490 is always above the piston rod 470, which can filter solid impurities contained in the fluid coupling agent in the water tank to ensure that the piston chamber 110 always remains clean. At the same time, it can also place the intercepted solid impurities outside the piston chamber 110, so that the positioning frame 430 can also smoothly scrape off the solid impurities during the movement, without the need for manual cleaning and maintenance by the inspection personnel.

[0079] like Figure 6 、 Figure 7 、 Figure 8 and Figure 9 As shown, the positioning mechanism 400 also includes an exhaust assembly 480, which includes a round box 481 fixedly connected to the other end of the mounting plate 100. The top and bottom ends of the round box 481 are both provided with liquid guide holes 4811. The interior of the round box 481 is rotatably connected to a water wheel 482 fixedly connected to the threaded column 420. The top of the upper liquid guide hole 4811 is fixedly connected and connected to a universal bamboo tube 483; the universal bamboo tube 483 includes a first ball seat 4831, a number of no less than ten second ball seats 4832 and a flat nozzle 4833. The first ball seat 4831 The second ball seat 4832 and one end of the flat nozzle 4833 are fixedly connected and connected to the top of the upper liquid guide hole 4811. The ball sleeve 4834 is fixedly connected and connected to the bottom ball seat 4834. The bottom ball seat 4834 is rotatably connected to the inside of the first ball seat 4831, and the remaining ball sleeves 4834 are rotatably connected to the inside of the adjacent second ball seat 4832. The two liquid guide holes 4811 are symmetrically distributed on the upper and lower sides of the axis of the round box 481. Both liquid guide holes 4811 are set on the same side of the axis of the water wheel 482, which enables the water wheel 482 to guide the fluid coupling agent in a single direction. To ensure the flow rate of the fluid coupling agent; the inner sides of the first ball seat 4831 and the second ball seat 4832 are embedded with O-rings 4835, and the O-rings 4835 are sleeved on the surface of the adjacent ball sleeves 4834, which can not only increase the sealing between the first ball seat 4831 and the second ball seat 4832 and the ball sleeve 4834, thereby reducing the probability of leakage of the fluid coupling agent during the flow inside the first ball seat 4831, the second ball seat 4832 and the ball sleeve 4834, but also increase the sealing between the first ball seat 4831 and the second ball seat 4832 and the ball sleeve The friction between the first ball seat 4831 and the second ball seat 4832, after the inspector has adjusted the spatial position of the flat nozzle 4833, is able to lock the flat nozzle 4833 in place through the friction of the O-ring 4835, achieving a good sub-locking effect. The downward opening of the ball sleeve 4834 is provided with a guide slope 48341. The vertical cross-section of the guide slope 48341 is an isosceles trapezoid. This can reduce the resistance of the fluid couplant entering the flow channel inside the ball sleeve 4834, further ensuring the flow rate of the fluid couplant.

[0080] Since bubbles are easily trapped at the bottom of a flat-bottomed ultrasonic receiver every time it is immersed in the fluid coupling agent, the inspector needs to use a dropper or other liquid spraying device to push away the bubbles at the bottom of the ultrasonic receiver every time it is immersed in the fluid coupling agent to improve the receiving accuracy of the ultrasonic receiver.

[0081] When the exhaust assembly 480 is in use, the inspector can rotate the corresponding ball sleeve 4834 to direct the opening of the flat nozzle 4833 toward the ultrasonic receiver and into the height of the fluid coupling agent. Then, while the inspector controls the waterproof servo motor 410 to fix the sample, the waterproof servo motor 410 synchronously drives the water wheel 482 to rotate through the threaded column 420. The water wheel 482 stirs the fluid coupling agent inside the round box 481 and pushes the fluid coupling agent toward the liquid guide hole 4811 in the direction of the fluid coupling agent flow. At this time, the fluid coupling agent inside the universal bamboo tube 483 flows into the interior of the round box 481 or is discharged from the universal bamboo tube 483. This can affect the flow of fluid coupling agent at the same height as the opening of the flat nozzle 4833 and form a laminar flow at that height. While passing through the flat bottom of the ultrasonic receiver, the fluid coupling agent can also entrain bubbles at the flat bottom of the ultrasonic receiver and discharge them. This eliminates the step of the inspector discharging bubbles at the flat bottom of the ultrasonic receiver after the ultrasonic receiver is immersed in the fluid coupling agent, thereby improving the efficiency of ultrasonic non-destructive testing of samples.

[0082] It should be noted that the waterproof stepper motor and waterproof servo motor 410 in the above description are both relatively mature devices in existing technology applications. The specific models can be selected according to actual needs. At the same time, the waterproof stepper motor and waterproof servo motor 410 can be powered by a built-in power supply or by AC power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0083] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of the present invention. Therefore, the scope of the present invention shall be determined by the appended claims.

Claims

1. An ultrasonic nondestructive testing device for aviation composite parts, characterized in that: include: A mounting plate (100) and a positioning mechanism (400); The mounting plate (100) is fixed in a water tank of the ultrasonic scanning microscope, the top of the mounting plate (100) is provided with uniformly distributed piston cavities (110), and the bottom is provided with a guide cavity (120) communicating with the piston cavity (110); The positioning mechanism (400) includes: a waterproof servo motor (410), a threaded column (420), a positioning frame (430), a guide rod (440), a sliding frame (450), an adjustment plate (460), and a piston rod (470); The waterproof servo motor (410) is mounted on the mounting plate (100), and the end of the output shaft of the waterproof servo motor (410) is fixedly connected to a threaded column (420), and the threaded column (420) rotates and penetrates the mounting plate (100); The adjusting plate (460) is arranged in the guide cavity (120) below the mounting plate (100), and a piston rod (470) is arranged on the adjusting plate (460) and inserted into the piston cavity (110); sliding frames (450) are arranged on both sides below the adjusting plate (460), and an inclined guide channel (451) is arranged on the sliding frame (450); a guide rod (440) is arranged in the guide channel (451), and a positioning frame (430) is fixedly connected to the guide rod (440), and the positioning frame (430) is threadedly connected to the threaded column (420). When the threaded column (420) rotates, the positioning frame (430) is driven to move along the threaded column (420), thereby driving the guide rod (440) to move in the guide channel (451), thereby driving the piston rod (470) on the adjusting plate (460) to move in the piston cavity (110); When an aviation composite material part is placed on the piston chamber (110), the waterproof servo motor (410) drives the piston rod (470) to separate from the piston chamber (110), generating negative pressure to adsorb the aviation composite material part.

2. The ultrasonic nondestructive testing device for aviation composite parts according to claim 1, characterized in that: It also includes: a connecting seat (200) and an angle adjustment mechanism (300); Both ends of the mounting plate (100) are rotatably connected to connection seats (200), and the connection seats (200) are locked in the water tank of the ultrasonic scanning microscope. An angle adjustment mechanism (300) fixedly connected to the mounting plate (100) is installed on the surface of one of the connection seats (200).

3. The ultrasonic nondestructive testing device for aviation composite parts according to claim 2, characterized in that: The angle adjustment mechanism (300) includes a waterproof stepping motor, wherein the end of the output shaft of the waterproof stepping motor and one side end of the mounting plate (100) are fixedly connected to a pulley, and the two pulleys are connected by a belt transmission, thereby driving the mounting plate (100) to rotate around an axis along the length direction.

4. The ultrasonic nondestructive testing device for aviation composite parts according to claim 1, characterized in that: The inner frame size of the positioning frame (430) is larger than the size of the piston chamber (110) of the mounting plate (100).

5. The ultrasonic nondestructive testing device for aviation composite parts according to claim 1, characterized in that: A positioning plate (4100) is fixedly connected to the top of the side of the mounting plate (100) close to the waterproof servo motor (410) and is used to clamp the aviation composite material part with the positioning frame (430).

6. The ultrasonic nondestructive testing device for aviation composite parts according to claim 1, characterized in that: The inner diameter of the guide rod (440) to which the sliding frame (450) is connected, the inner diameter of the guide channel (451) and the diameter of the guide rod (440) are all the same; There are two sliding frames (450), and the two sliding frames (450) are symmetrically distributed on both sides of the axis of the threaded column (420).

7. The ultrasonic nondestructive testing device for aviation composite parts according to claim 1, characterized in that: The vertical cross-section of the piston chamber (110) is cross-shaped, and the vertical cross-section of the piston rod (470) is T-shaped. The maximum diameter of the piston rod (470) arranged inside the piston chamber (110) is larger than the inner diameter of the upper and lower openings of the piston chamber (110), which can confine the piston rod (470) inside the piston chamber (110) and prevent the piston rod (470) from loosening.

8. The ultrasonic nondestructive testing device for aviation composite parts according to claim 1, characterized in that: A filter screen (490) is embedded in the interior of the piston chamber (110), and the top of the filter screen (490) is flush with the upper opening of the piston chamber (110). The filter screen (490) is always on the piston rod (470).

9. The ultrasonic nondestructive testing device for aviation composite parts according to claim 1, characterized in that: The positioning mechanism (400) further includes: an exhaust assembly (480), the exhaust assembly (480) including a round box (481) fixedly connected to the other end of the mounting plate (100); The top and bottom ends of the round box (481) are both provided with a liquid guide hole (4811). The inside of the round box 481 is rotatably connected to a water wheel (482) fixedly connected to the threaded column (420). The top of the upper liquid guide hole (4811) is fixedly connected and connected to a universal bamboo tube (483); the universal bamboo tube (483) includes a first ball seat (4831), a number of not less than ten second ball seats (4832) and a flat nozzle (4833). The first ball seat (4831) is fixedly connected and connected to the top of the upper liquid guide hole (4811). The second ball seat (4832) and the flat nozzle ( One end of each of the round box 4833 is fixedly connected and connected to a ball sleeve (4834), the lowest ball sleeve (4834) is rotatably connected to the inside of the first ball seat (4831), and the remaining ball sleeves (4834) are rotatably connected to the inside of the adjacent second ball seat (4832); the two liquid guide holes (4811) are symmetrically distributed on the upper and lower sides of the axis of the round box 481, and the two liquid guide holes (4811) are both arranged on the same side of the axis of the water wheel (482), which enables the water wheel (482) to guide the fluid coupling agent in a single direction to ensure the flow rate of the fluid coupling agent; the first ball seat (4831) and the second ball seat (4831) are symmetrically distributed on the upper and lower sides of the axis of the round box 481, and the two liquid guide holes (4811) are both arranged on the same side of the axis of the water wheel (482), which enables the water wheel (482) to guide the fluid coupling agent in a single direction to ensure the flow rate of the fluid coupling agent; The inner side of the ball seat (4832) is embedded with an O-ring (4835), and the O-ring (4835) is sleeved on the surface of the adjacent ball sleeve (4834). This not only increases the sealing between the first ball seat (4831) and the second ball seat (4832) and the ball sleeve (4834), thereby reducing the probability of leakage of the fluid coupling agent during the flow inside the first ball seat (4831), the second ball seat (4832) and the ball sleeve (4834), but also increases the sealing between the first ball seat (4831) and the second ball seat (4832) and the ball sleeve (4834). Friction: After the inspector has adjusted the spatial position of the flat nozzle (4833), the first ball seat (4831) and the second ball seat (4832) can lock the flat nozzle (4833) in this position by the friction of the O-ring (4835), thereby achieving a good sub-locking effect; the downward opening of the ball sleeve (4834) is provided with a guide slope (48341), and the vertical cross-section of the guide slope (48341) is an isosceles trapezoid, which can reduce the resistance of the fluid coupling agent entering the inner flow channel of the ball sleeve (4834), further ensuring the flow rate of the fluid coupling agent; Since bubbles are easily trapped at the bottom of a flat-bottomed ultrasonic receiver every time it is immersed in the fluid coupling agent, the inspector needs to use a dropper or other liquid spraying device to push away the bubbles at the bottom of the ultrasonic receiver every time it is immersed in the fluid coupling agent to improve the receiving accuracy of the ultrasonic receiver. When the exhaust assembly (480) is in use, the inspector can rotate the corresponding ball sleeve (4834) to move the opening of the flat nozzle (4833) toward the ultrasonic receiver and into the height of the fluid coupling agent according to the needs. Then, while the inspector controls the waterproof servo motor (410) to fix the sample, the waterproof servo motor (410) synchronously drives the water wheel (482) to rotate through the threaded column (420). The water wheel (482) stirs the fluid coupling agent inside the round box (481) and pushes the fluid coupling agent toward the liquid guide hole ( 4811), at this time, the fluid coupling agent inside the universal bamboo tube (483) flows into the inside of the round box (481) or is discharged from the universal bamboo tube (483), which can affect the flow of the fluid coupling agent at the same height of the opening of the flat nozzle (4833) and form a laminar flow at this height. While passing through the flat bottom of the ultrasonic receiver, the fluid coupling agent can also carry away the bubbles at the flat bottom of the ultrasonic receiver. This saves the tester the step of discharging the bubbles at the flat bottom of the ultrasonic receiver after the ultrasonic receiver penetrates into the fluid coupling agent, thereby improving the efficiency of ultrasonic non-destructive testing of the sample.

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