A castings fluorescent penetrant inspection apparatus

Abstract

The application discloses casting fluorescent penetrant testing equipment and belongs to the technical field of penetrant testing. In order to solve the problem that the casting fluorescent penetrant testing equipment is usually used in the vertical immersion of the casting into the penetration tank by the horizontal fixing of the lifting frame to complete the infiltration process, thereby easily causing the formation of a closed air mass inside the inner cavity and deep blind hole of the casting, the application comprises a support frame, a support table is arranged in the support frame, a penetration box is fixedly connected in the support table, a translation feeding assembly is arranged at the top of the support frame, a lifting assembly is arranged on one side of the translation feeding assembly, the translation feeding assembly and the lifting assembly are used for realizing the horizontal transfer and vertical lifting displacement adjustment of the casting, a vibration assembly for driving the small-amplitude high-frequency vibration of the casting to remove defect microbubbles is arranged at the bottom of the lifting assembly, the application can drive the segmented inclined sinking of the casting into the penetration liquid, continuously discharge the closed air in the inner cavity of the casting, eliminate the immersion bubble air resistance, deepen the filling depth of the penetration liquid, and reduce the false defects in the flaw detection.

Description

Technical Field

[0001] This invention relates to the field of penetrant testing technology, specifically to a fluorescent penetrant testing device for castings. Background Technology

[0002] With the mass production of precision castings made from new materials such as high-temperature alloys and titanium alloys in the aerospace and gas turbine industries, surface opening defects such as microcracks, blind holes, and intergranular porosity are easily generated during the casting and machining processes. If these defects remain, they will significantly reduce the reliability of the components. Therefore, the industry typically uses fluorescent penetrant nondestructive testing equipment to screen casting defects. This involves pre-treating the castings by degreasing and cleaning, immersing them in a penetrant tank, rinsing them with clean water to remove excess penetrant, drying them at low temperature, spraying a developer, and observing the fluorescent defect display under an ultraviolet light source. The location and size of the defects are determined by the fluorescent bright spots. This is an indispensable quality inspection device for new material castings before they leave the factory.

[0003] Current fluorescent penetrant testing equipment for castings typically uses a lifting frame to horizontally fix the casting and vertically immerse it in the penetrant tank to complete the wetting process. This can easily lead to the formation of closed air masses inside the casting cavity and deep blind holes. The air bubbles remain inside the defects for a long time, forming air resistance and preventing the penetrant from penetrating to the bottom of the crack, thus affecting the testing quality.

[0004] To address the above issues, a fluorescent penetrant testing device for castings is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a fluorescent penetrant testing device for castings. By using this invention, the problem of forming a closed air mass inside the casting cavity and deep blind holes is easily caused by the common method of using a lifting frame to fix the casting horizontally and immersing it vertically into the penetrant tank to complete the wetting process in the aforementioned fluorescent penetrant testing device.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A fluorescent penetrant testing device for castings includes a support frame, a support platform inside the support frame, and a penetrant chamber fixedly connected inside the support platform. A translational feeding component is provided at the top of the support frame, and a lifting component is provided on one side of the translational feeding component. The translational feeding component and the lifting component are used to realize the lateral transfer and vertical lifting displacement adjustment of the casting. A vibration component is provided at the bottom of the lifting component to drive the casting to vibrate at a small amplitude and high frequency to remove defect microbubbles. A dynamic tilting component is provided inside the vibration component to drive the casting to tilt and sink in sections to realize synchronous air venting during the immersion process. A fixing component is provided on one side of the dynamic tilting component, and the fixing component is used to clamp and limit multiple sets of casting bodies.

[0007] Furthermore, the translational feeding assembly includes several first slide rails and two first toothed plates that are relatively fixedly connected to the top of the support frame. Two slide plates are slidably connected to the top of the several first slide rails. Two first servo motors are fixedly connected to the top of each of the two slide plates. The output ends of the two first servo motors are rotatably connected to the two slide plates respectively. A first gear is fixedly connected to the output ends of the two first servo motors. The first gear meshes with the first toothed plate. A crossbeam is fixedly connected to the top of the two slide plates.

[0008] Furthermore, the lifting assembly includes a vertical plate fixedly connected to one side of the crossbeam, a second servo motor installed on one side of the vertical plate, the output end of the second servo motor being rotatably connected to the vertical plate, a second gear fixedly connected to the output end of the second servo motor, two second slide rails being slidably connected to one side of the vertical plate, a lifting plate fixedly connected to one side of the two second slide rails, and a second toothed plate fixedly connected to one side of the lifting plate, with the second gear meshing with the second toothed plate.

[0009] Furthermore, the vibration assembly includes two mounting plates that are fixedly connected to both sides of the second toothed plate. A first connecting plate is fixedly connected to the bottom of the two mounting plates. A fixed cylinder is fixedly connected to each of the four corners of the bottom of the first connecting plate. A connecting rod is slidably connected inside each of the four fixed cylinders. A spring is fixedly connected to one end of the connecting rod, and the other end of the spring is fixedly connected to the inner wall of the fixed cylinder. A second connecting plate is fixedly connected to the bottom of the four connecting rods. A vibration motor is installed on the top of the second connecting plate. The bottom of the second connecting plate is fixedly connected to two connecting frames, and a bearing frame is fixedly connected to the other side of the two connecting frames. A vision sensor is installed on the bottom of the first connecting plate.

[0010] Furthermore, the dynamic tilting assembly includes a protective frame fixedly connected to one side of the support frame, a third servo motor installed on one side of the support frame, the protective frame covering the third servo motor, a first rotating shaft rotatably connected inside the support frame, and two second rotating shafts rotatably connected to both sides of the support frame. Two first timing pulleys are fixedly connected to the outer wall of the first rotating shaft, and two second timing pulleys are fixedly connected to the outer wall of each of the two second rotating shafts. The two first timing pulleys and the two second timing pulleys are respectively connected by timing belt drives.

[0011] Furthermore, the fixing component includes a grid frame fixedly connected to one end of two second rotating shafts, a grid plate rotatably connected to one side of the grid frame, a threaded rod threadedly connected to the grid plate, the threaded rod being threadedly connected to the grid frame, and the grid frame and grid plate respectively fitting against both sides of the casting body.

[0012] Furthermore, the top of the support platform is provided with two movable sealing assemblies for enclosing the casting body to form a sealed pressurized cavity. The movable sealing assembly includes a third slide rail fixedly connected to the top of the support platform, a sliding rod slidably connected to the outer wall of the third slide rail, a movable frame fixedly connected to the top of the sliding rod, a positioning seat fixedly connected to the top of the support platform, a sealing frame fixedly connected to one side of the movable frame, a dual-axis cylinder installed on the inner wall of the movable frame, one output end of the dual-axis cylinder fixedly connected to one side of the positioning seat, and one output end of the dual-axis cylinder slidably connected to the movable frame. The inner cavity of the movable frame and the inner cavity of the sealing frame form a first pressurized cavity. A solenoid valve is connected to the top of the sealing frame, and a pressure sensor is installed inside the sealing frame.

[0013] Furthermore, each of the two movable sealing assemblies is provided with an air intake and pressurization assembly for compressing air and providing a pressurized air source. The air intake and pressurization assembly includes a piston slidably connected to the movable frame. The other output end of the dual-axis cylinder is fixedly connected to one side of the piston. Two guide rods are fixedly connected to one side of the piston. Both guide rods are slidably connected to the movable frame. An air intake pipe is connected to one side of the movable frame. A first one-way valve is installed on the air intake pipe. The movable frame and the piston form a second pressurization chamber.

[0014] Furthermore, the permeation chamber is equipped with a circumferential circulation blowing assembly for lateral slow-release airflow and driving the fluorescent permeate to rotate and degas in a directional manner. The circumferential circulation blowing assembly is connected to the movable sealing assembly. The circumferential circulation blowing assembly includes a bellows connected to one side of the movable frame, and the other end of the bellows is connected to a connecting pipe. The bellows is fixedly connected to the inner wall of the positioning seat. An adjusting valve is installed on the connecting pipe, and the other end of the connecting pipe is connected to a Y-shaped branch pipe. A support ring is fixedly connected inside the permeation chamber. Several L-shaped air outlet pipes are uniformly fixedly connected inside the support ring. The several L-shaped air outlet pipes are all connected to the Y-shaped branch pipe. A second one-way valve is installed on each of the several L-shaped air outlet pipes. One end of each of the several L-shaped air outlet pipes is connected to a flat nozzle pipe.

[0015] Furthermore, the bottom of the sealing frame is inclined.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the cooperation between the lifting component and the dynamic tilting component, the casting can be tilted and sunk in sections to slowly immerse itself in the penetrating liquid, continuously expelling the closed air in the inner cavity of the casting, eliminating the air resistance of the immersion air bubbles, deepening the filling depth of the penetrating liquid, and reducing false defects in the flaw detection. By setting up the vibration component, high-frequency small-amplitude excitation can be output after the casting is completely immersed. The impact of the equipment is reduced by spring buffering, and the tiny air bubbles adsorbed on the inner wall of the casting crack are shaken off, allowing the penetrant to fully penetrate into the minute defects, thereby improving the uniformity and detection accuracy of penetrant testing. By cooperating with the moving sealing component and the air inlet pressurizing component, a closed pressurized cavity can be formed around the casting. The compressed gas creates a high-pressure environment, and the pressure difference drives the penetrant into deep blind holes and microcracks, shortening the penetration process time and increasing the probability of detecting minute defects. By combining the dynamic tilting component and the moving sealing component, the casting can be tilted at multiple angles inside the sealed cavity after high-pressure permeation is completed, and the excess permeate on the surface and inside the cavity can be centrifugally removed, simplifying the process and reducing permeate loss. By coordinating the air intake pressurization component and the circumferential circulation blowing component, the stored compressed gas is tangentially ejected to form a permeate circulation, which continuously carries away the microbubbles that have been dislodged by vibration, preventing the bubbles from re-adsorbing the casting and reducing the probability of misjudgment in fluorescent flaw detection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial top view of the structure of the present invention; Figure 3 for Figure 2 Enlarged view of point A; Figure 4 This is a cross-sectional structural diagram showing the connection relationship between the lifting assembly and the vibration assembly of the present invention; Figure 5 for Figure 4 Enlarged view of point B; Figure 6 This is a cross-sectional structural diagram showing the connection relationship between the vibration component, dynamic tilting component, fixing component and casting body of the present invention. Figure 7 This is a partial cross-sectional structural diagram of the present invention; Figure 8 for Figure 7 Enlarged view of point C; Figure 9 for Figure 7 Enlarged view of point D.

[0018] In the diagram: 1. Support frame; 2. Support platform; 3. Infiltration box; 4. Translational feeding assembly; 41. First slide rail; 42. First gear plate; 43. Slide plate; 44. First servo motor; 45. First gear; 46. Crossbeam; 5. Lifting assembly; 51. Vertical plate; 52. Second servo motor; 53. Second gear; 54. Second gear plate; 55. Lifting plate; 56. Second slide rail; 6. Vibration assembly; 61. Mounting plate; 62. First connecting plate; 63. Fixed cylinder; 64. Connecting rod; 65. Spring; 66. Second connecting plate; 67. Vibration motor; 68. Connecting frame; 69. Bearing frame; 610. Vision sensor; 7. Dynamic tilting assembly; 71. Protective frame; 72. Third servo motor; 73. First rotating shaft; 74. Second rotating shaft; 75. First timing pulley; 76. 77. Timing belt; 8. Fixing assembly; 81. Grille frame; 82. Grille plate; 83. Threaded rod; 9. Casting body; 10. Moving sealing assembly; 101. Third slide rail; 102. Sliding rod; 103. Moving frame; 104. Positioning seat; 105. Sealing frame; 106. Dual-axis cylinder; 107. First pressurizing chamber; 108. Solenoid valve; 109. Air pressure sensor; 20. Intake pressurizing assembly; 201. Piston; 202. Guide rod; 203. Intake pipe; 204. First one-way valve; 205. Second pressurizing chamber; 30. Circumferential flow blowing assembly; 301. Bellows; 302. Connecting pipe; 303. Regulating valve; 304. Y-type branch pipe; 305. L-type outlet pipe; 306. Support ring; 307. Second one-way valve; 308. Flat nozzle pipe. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-3 and Figure 7 As shown, a fluorescent penetrant testing device for castings includes a support frame 1, a support platform 2 inside the support frame 1, the support frame 1 and the support platform 2 are used to support and fix various components respectively, a controller is installed on one side of the support frame 1 to control various electrical components, and a penetrant 3 is fixedly connected inside the support platform 2. The penetrant 3 is filled with fluorescent penetrant liquid and can complete the capillary wetting test process for surface defects of castings.

[0021] To address the technical problem of sealed air masses forming inside casting cavities and deep blind holes, where air bubbles remain trapped within defects for extended periods, creating air resistance and hindering penetrating agents from reaching the bottom of cracks, such as... Figures 1-6As shown, the following preferred technical solutions are provided: The support frame 1 is equipped with a translational feeding component 4 at the top, and a lifting component 5 is provided on one side of the translational feeding component 4. The translational feeding component 4 and the lifting component 5 are used to realize the horizontal transfer and vertical lifting displacement adjustment of the casting. The bottom of the lifting component 5 is equipped with a vibration component 6 for driving the casting to vibrate slightly at high frequency to remove defect microbubbles. The vibration component 6 is equipped with a dynamic tilting component 7 for driving the casting to tilt and sink in sections to realize synchronous air exhaust during the immersion process. A fixing component 8 is provided on one side of the dynamic tilting component 7. The fixing component 8 is equipped with the casting body 9. The fixing component 8 is used to clamp and limit multiple sets of casting bodies 9.

[0022] In use, several casting bodies 9 that have undergone degreasing and drying pretreatment are placed in the fixing component 8 to achieve batch stable clamping and positioning of the casting bodies 9. After fixing, the controller causes the translational feeding component 4 to move the lifting component 5, vibration component 6, fixing component 8 and casting bodies 9, so that several casting bodies 9 are positioned directly above the liquid surface of the permeation tank 3. Then, the controller causes the lifting component 5 to move the vibration component 6, fixing component 8 and casting bodies 9 downward until the lower end of the casting body 9 contacts the surface of the fluorescent permeation liquid. When the casting body 9 contacts the surface of the fluorescent permeation liquid in the permeation tank 3, the controller causes the dynamic tilting component 7 to move the fixing component 8 and casting bodies 9 to dynamically tilt and rotate in segments. During the process, the lifting component 5 moves the vibration component 6, fixing component 8 and casting bodies 9 downward continuously, which can continuously expel the closed air inside the casting body 9 during immersion and reduce bubble encapsulation. Compared with the vertical whole direct immersion method in the prior art, it can reduce the internal air resistance of defects and increase the filling depth of the permeate.

[0023] When the lifting assembly 5 moves the casting body 9 down to its lowest stroke and is completely immersed in the fluorescent penetrant in the penetrant tank 3, the controller causes the vibration assembly 6 to generate high-frequency small-amplitude mechanical vibration, which drives the fixing assembly 8 and the casting body 9 to synchronously vibrate at high frequency. This can shake off the tiny air bubbles remaining on the inner wall of the defect, thereby improving the penetrant penetration efficiency.

[0024] like Figure 3 As shown, the translational feeding assembly 4 includes several first slide rails 41 and two first toothed plates 42 that are relatively fixedly connected to the top of the support frame 1. Two slide plates 43 are slidably connected to the top of the several first slide rails 41. Two first servo motors 44 are fixedly connected to the top of each of the two slide plates 43. The output ends of the two first servo motors 44 are rotatably connected to the two slide plates 43 respectively. A first gear 45 is fixedly connected to the output ends of the two first servo motors 44. The first gear 45 meshes with the first toothed plate 42. A crossbeam 46 is fixedly connected to the top of the two slide plates 43.

[0025] like Figure 3 and Figure 4 As shown, the lifting assembly 5 includes a vertical plate 51 fixedly connected to one side of the crossbeam 46. A second servo motor 52 is installed on one side of the vertical plate 51. The output end of the second servo motor 52 is rotatably connected to the vertical plate 51. A second gear 53 is fixedly connected to the output end of the second servo motor 52. Two second slide rails 56 are slidably connected to one side of the vertical plate 51. A lifting plate 55 is fixedly connected to one side of the two second slide rails 56. A second toothed plate 54 is fixedly connected to one side of the lifting plate 55. The second gear 53 meshes with the second toothed plate 54.

[0026] like Figures 3-6 As shown, the vibration assembly 6 includes two mounting plates 61 fixedly connected to both sides of the second toothed plate 54. A first connecting plate 62 is fixedly connected to the bottom of the two mounting plates 61. A fixing cylinder 63 is fixedly connected to each of the four corners of the bottom of the first connecting plate 62. A connecting rod 64 is slidably connected inside each of the four fixing cylinders 63. A spring 65 is fixedly connected to one end of each connecting rod 64, and the other end of the spring 65 is fixedly connected to the inner wall of the fixing cylinder 63. The elastic force of the spring 65 is adapted to high-frequency, small-amplitude vibration conditions, and can buffer vibration impact. A second connecting rod is fixedly connected to the bottom of each of the four connecting rods 64. The second connecting plate 66 has a vibration motor 67 installed on its top. The vibration motor 67 can output high-frequency low-amplitude excitation force to drive the casting body 9 to synchronously micro-vibrate and peel off the tiny air bubbles in the defects. The bottom of the second connecting plate 66 is relatively fixedly connected to two connecting frames 68, and the other side of the two connecting frames 68 is fixedly connected to a bearing frame 69. The bottom of the first connecting plate 62 has a vision sensor 610 installed. The vision sensor 610 is an industrial high-definition image recognition sensor that can collect the immersion posture and liquid level height signals of the casting body 9 in real time and feed them back to the controller to link the tilting action.

[0027] like Figure 5 and Figure 6 As shown, the dynamic tilting assembly 7 includes a protective frame 71 fixedly connected to one side of the support frame 69. A third servo motor 72 is installed on one side of the support frame 69. The first servo motor 44, the second servo motor 52, and the third servo motor 72 all have a self-locking function. The protective frame 71 covers the third servo motor 72. A first rotating shaft 73 is rotatably connected inside the support frame 69. Two second rotating shafts 74 are rotatably connected to both sides of the support frame 69. Two first timing pulleys 75 are fixedly connected to the outer wall of the first rotating shaft 73. Two second timing pulleys 76 are fixedly connected to the outer wall of each of the two second rotating shafts 74. The two first timing pulleys 75 and the two second timing pulleys 76 are respectively connected by a timing belt 77.

[0028] like Figure 6As shown, the fixing component 8 includes a grid frame 81 fixedly connected to one end of two second rotating shafts 74. A grid plate 82 is rotatably connected to one side of the grid frame 81. A threaded rod 83 is internally threaded to the grid plate 82. A rotating block is provided at one end of the threaded rod 83 to facilitate the user to screw it. The threaded rod 83 is threadedly connected to the grid frame 81. The grid frame 81 and the grid plate 82 are respectively attached to both sides of the casting body 9, which can realize the fixing of the grid frame 81 and the grid plate 82.

[0029] In use, several casting bodies 9 that have undergone degreasing and drying pretreatment are placed in two grid frames 81. The user then rotates the grid plate 82 to press and fix the casting bodies 9 against the grid frame 81. Next, the user rotates the threaded rod 83 to fix the grid plate 82 to the grid frame 81, achieving reliable locking and limiting of multiple casting bodies 9. After fixing, the controller causes two first servo motors 44 to synchronously drive two first gears 45 to rotate. Through the meshing of the first gears 45 and the first toothed plate 42, two sliding plates 43 synchronously slide on the first slide rail 41, thereby driving the crossbeam 46, lifting plate 55, first connecting plate 62, second connecting plate 66, bearing frame 69, grid frame 81, grid plate 82, and casting bodies 9 to move synchronously, so that several casting bodies 9 are directly above the liquid surface of the permeation tank 3. Then, the controller causes the second servo motor 52 to drive the second gear 53 to rotate, and through the meshing of the second gear 53 and the second toothed plate 54, the lifting plate 55... The second slide rail 56 slides downwards, causing the first connecting plate 62, the second connecting plate 66, the bearing frame 69, the grid frame 81, the grid plate 82, and the casting body 9 to move downwards synchronously until the bottom of the casting body 9 contacts the surface of the fluorescent penetrating liquid. When the casting body 9 contacts the surface of the fluorescent penetrating liquid in the penetrating tank 3, the visual sensor 610 detects this and, through the controller, causes the third servo motor 72 to drive the first rotating shaft 73 and the two first timing pulleys 75 to rotate synchronously. Through the transmission of the two timing belts 77, the two second timing pulleys 76 drive the second rotating shaft 74 to rotate synchronously. This causes the two grid frames 81, the grid plate 82, and the casting body 9 to dynamically tilt and flip in segments. During this process, the second servo motor 52 drives the first connecting plate 62, the second connecting plate 66, the bearing frame 69, the grid frame 81, the grid plate 82, and the casting body 9 to continuously move downwards. This allows for continuous venting throughout the immersion process, eliminating deep blind holes and internal air masses. Compared to the vertical immersion method of the workpiece in the prior art, this method can suppress the generation of closed bubbles and shorten the penetrating time.

[0030] When the second servo motor 52 drives the casting body 9 to move down to the lowest limit stroke and completely immerses it in the fluorescent penetrant in the penetrant tank 3, the controller causes the vibration motor 67 to generate high-frequency micro-amplitude excitation. During this process, the connecting rod 64 slides in the fixed cylinder 63 and reciprocates to compress and stretch the spring 65, so that the second connecting plate 66, the two connecting frames 68, the bearing frame 69, the grid frame 81, the grid plate 82 and the casting body 9 vibrate synchronously at a small amplitude and high frequency, which can shake off the attached air bubbles and improve the uniformity of penetrant filling.

[0031] To address the technical problem of insufficient penetration efficiency in the main body 9 of the casting, such as Figure 1 and Figures 7-9 As shown, the following preferred technical solutions are provided: The top of the support platform 2 is provided with two movable sealing components 10 for enclosing the main body 9 of the casting to form a closed pressurized cavity. Each of the two movable sealing components 10 is provided with an air inlet pressurizing component 20 for compressing air and providing a pressurized air source. The permeation box 3 is provided with a circumferential circulation blowing component 30 for lateral slow-release airflow and driving the fluorescent permeate liquid to rotate and degas. The circumferential circulation blowing component 30 is connected to the movable sealing components 10.

[0032] After the casting body 9 has been immersed for a period of time, the controller causes the lifting component 5 to move the vibration component 6, the fixing component 8 and the casting body 9 upward until the horizontal height of the casting body 9 corresponds to the horizontal height of the two moving sealing components 10. At this time, the controller causes the two moving sealing components 10 to move closer to each other and fit tightly to seal, forming a complete sealed pressurized cavity, which completely covers and houses the fixing component 8 and the casting body 9. Then, the controller causes the driving structure inside the two moving sealing components 10 to move the two air intake pressurization components 20 closer to each other and squeeze the air inside the sealed pressurized cavity, so that the air pressure inside the cavity gradually increases, forming a high-pressure gas phase pressurization environment. The pressure difference can force the penetrant to penetrate deep into the microcracks of the casting body 9, thereby increasing the penetration and filling depth of microcracks and deep blind hole defects, shortening the overall penetration time and improving the detection rate of micro defects.

[0033] After a period of high-pressure permeation, the controller causes the dynamic tilting component 7 to drive the fixed component 8 and the casting body 9 to tilt and throw liquid at multiple angles, removing excess fluorescent permeate from the inside and surface of the casting body 9 by centrifugation. Then, the controller causes the two moving sealing components 10 to move away from each other and reset, while the two air inlet pressurizing components 20 move away from each other and reset, completing the sealed pressurization and in-situ liquid throwing process. Afterwards, the controller causes the lifting component 5 to drive the vibration component 6, the fixed component 8 and the casting body 9 to move upward and reset. Then, the controller causes the translational feeding component 4 to drive the lifting component 5, the vibration component 6, the fixed component 8 and the casting body 9 to move, for subsequent cleaning and imaging flaw detection operations.

[0034] As the two intake pressurization components 20 approach each other, they replenish the cavity structure within each intake pressurization component 20 with gas. As the two intake pressurization components 20 move away from each other and reset, they continuously compress the stored gas.

[0035] Subsequently, when the lifting assembly 5 moves the casting body 9 down to the immersion position and is fully immersed in the fluorescent penetrant in the penetrant box 3, during the immersion and penetrant stage, the valve structure in the circumferential circulation blowing assembly 30 is opened by the controller, so that the compressed gas is slowly sprayed out laterally tangentially through the circumferential circulation blowing assembly 30, so that the fluorescent penetrant in the penetrant box 3 forms a stable circumferential rotating circulation, which can continuously remove the microbubbles that have been dislodged by vibration, avoid the bubbles from re-adsorbing the casting and producing false fluorescence display, can gently disturb, is not prone to excessive foaming, and improves penetrant efficiency and flaw detection accuracy.

[0036] like Figure 7 and Figure 8 As shown, the movable sealing assembly 10 includes a third slide rail 101 fixedly connected to the top of the support platform 2. A sliding rod 102 is slidably connected to the outer wall of the third slide rail 101. A movable frame 103 is fixedly connected to the top of the sliding rod 102. A positioning seat 104 is fixedly connected to the top of the support platform 2. A sealing frame 105 is fixedly connected to one side of the movable frame 103. A sealing ring is provided on one side of the sealing frame 105, which can achieve leak-free and airtight isolation at the mating surfaces of the two sealing frames 105, and withstand internal high pressure without pressure release. A dual-axis cylinder 106 is installed on the inner wall of the movable frame 103. The dual-axis cylinder 106 is a dual-rod independent drive cylinder, which can control the movement of the two movable ends separately. One of the output ends of the cylinder 106 is fixedly connected to one side of the positioning seat 104. One of the output ends of the dual-axis cylinder 106 is slidably connected to the moving frame 103. At the same time, a wear-resistant fluoroplastic guide bushing is provided at the sliding connection to reduce sliding friction and prevent high-pressure gas from leaking along the sliding gap. The inner cavity of the moving frame 103 and the inner cavity of the sealing frame 105 form the first pressurization chamber 107. The top of the sealing frame 105 is connected to a solenoid valve 108, which can automatically open to release the high-pressure gas in the chamber after pressurization. A pressure sensor 109 is installed in the sealing frame 105. The pressure sensor 109 can collect the pressure value inside the first pressurization chamber 107 and feed it back to the controller.

[0037] like Figure 8As shown, the intake pressurization assembly 20 includes a piston 201 slidably connected to the movable frame 103. The other output end of the dual-axis cylinder 106 is fixedly connected to one side of the piston 201. Two guide rods 202 are fixedly connected to one side of the piston 201. Both guide rods 202 are slidably connected to the movable frame 103. At the same time, a wear-resistant fluoroplastic guide bushing is provided at the sliding connection. An intake pipe 203 is connected to one side of the movable frame 103. A first one-way valve 204 is installed on the intake pipe 203. The movable frame 103 and the piston 201 form a second pressurization chamber 205.

[0038] like Figures 7-9 As shown, the circumferential circulation blowing assembly 30 includes a bellows 301 connected to one side of the movable frame 103. The bellows 301 can expand and contract laterally with the movable sealing assembly 10, while ensuring that the compressed gas delivery passage is completely sealed and leak-proof. The other end of the bellows 301 is connected to a connecting pipe 302. The bellows 301 is fixedly connected to the inner wall of the positioning seat 104. A regulating valve 303 is installed on the connecting pipe 302. The regulating valve 303 can adjust the gas flow rate in the pipeline to adapt to the different circulating degassing requirements of castings. The other end of the connecting pipe 302 is connected to a Y-shaped branch pipe 304. A support ring 306 is fixedly connected inside the permeation chamber 3. Several L-shaped air outlet pipes 305 are evenly fixedly connected inside the support ring 306. One end of each L-shaped air outlet pipe 305 is inclined, allowing air to be discharged laterally along the tangent of the inner wall of the permeation chamber 3. The airflow does not directly impact the casting body 9. Each L-shaped air outlet pipe 305 is connected to a Y-shaped branch pipe 304. A second one-way valve 307 is installed on each L-shaped air outlet pipe 305. One end of each L-shaped air outlet pipe 305 is connected to a flat nozzle pipe 308, which can disperse the airflow and output smooth and fine bubbles, avoiding violent turbulence of the liquid.

[0039] The bottom of the sealing frame 105 is inclined so that the fluorescent permeate dripping during the liquid-spinning stage can be guided back along the inclined surface to the permeation tank 3 below.

[0040] After the casting body 9 has been immersed for a period of time, the controller causes the second servo motor 52 to move the support frame 69, the grid frame 81, the grid plate 82, and the casting body 9 upwards until the horizontal height of the casting body 9 corresponds to the horizontal height of the two moving frames 103. At this time, the controller causes one of the movable ends of the two dual-axis cylinders 106 to extend synchronously, causing the moving frame 103 to drive the sliding rod 102 to slide on the third slide rail 101, thereby causing the two sealing frames 105 to move closer to each other and fit tightly to seal, forming a complete first pressure chamber 107, and moving the grid frame 81 and the grid plate 82... The casting body 9 is completely encased and housed. Then, through the controller, the other movable end of the two dual-axis cylinders 106 is extended, which drives the two pistons 201 to slide within the moving frame 103, causing the two pistons 201 to move closer to each other. At this time, the internal volume of the first pressurization chamber 107 continues to shrink, which causes the gas pressure inside the first pressurization chamber 107 to gradually increase, forming a stable high-pressure gas phase permeation environment. The pressure difference forces the permeating agent to fill the micro-cracks and blind holes in the casting body 9, improving the penetration filling depth of micro-cracks and deep blind hole defects, shortening the overall penetration time, and improving the detection rate of micro-defects.

[0041] After a period of high-pressure permeation, the controller opens the solenoid valve 108, releasing the high pressure in the first pressurization chamber 107. This causes the third servo motor 72 to rotate in both directions, continuously tilting and throwing liquid from the grid frame 81, grid plate 82, and casting body 9. Excess fluorescent permeate is centrifuged to remove it from the interior and surface of the casting body 9. Subsequently, the controller causes one movable end of each of the two dual-axis cylinders 106 to shorten synchronously, causing the two sealing frames 105 to move away from each other and reset. Simultaneously, the other movable end of each dual-axis cylinder 106 shortens. The two pistons 201 are driven to slide within the moving frame 103, and the two pistons 201 move away from each other to reset, completing the sealed pressurization and in-situ liquid ejection process. Then, through the controller, the second servo motor 52 drives the bearing frame 69, grid frame 81, grid plate 82 and casting body 9 to move upward to reset. Through the controller, the two first servo motors 44 drive the lifting plate 55, first connecting plate 62, second connecting plate 66, bearing frame 69, grid frame 81, grid plate 82 and casting body 9 to move, and perform subsequent cleaning and imaging flaw detection operations.

[0042] As the two pistons 201 approach each other, outside air enters the second pressurization chamber 205 through the intake pipe 203 and the first one-way valve 204, replenishing the two second pressurization chambers 205 with air. As the two pistons 201 move away from each other and reset, the gas stored in the second pressurization chamber 205 is continuously compressed.

[0043] Subsequently, when the second servo motor 52 drives the casting body 9 to move down to the fully submerged position and is completely immersed in the fluorescent penetrant in the penetrant tank 3, and is in the immersion penetrant stage, the controller opens the regulating valve 303. At this time, the compressed gas in the second pressurization chamber 205 is slowly released laterally and tangentially through the bellows 301, connecting pipe 302, regulating valve 303, Y-shaped branch pipe 304, several L-shaped air outlet pipes 305, second one-way valve 307 and flat nozzle pipe 308, so that the fluorescent penetrant in the penetrant tank 3 forms a continuous directional circumferential rotating liquid flow, which can continuously carry away the microbubbles that have fallen off due to vibration, update the fresh fluorescent penetrant around the casting body 9, reduce the false fluorescence display caused by surface bubbles, reduce the false judgment rate of flaw detection, and improve the penetrant efficiency.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fluorescent penetrant testing device for castings, comprising a support frame (1), a support platform (2) disposed within the support frame (1), and a penetrant chamber (3) fixedly connected within the support platform (2), characterized in that: The support frame (1) is provided with a translational feeding component (4) at the top and a lifting component (5) on one side of the translational feeding component (4). The translational feeding component (4) and the lifting component (5) are used to realize the horizontal transfer and vertical lifting displacement adjustment of the casting. The bottom of the lifting component (5) is provided with a vibration component (6) for driving the casting to vibrate slightly at high frequency to remove defective microbubbles. The vibration component (6) is provided with a dynamic tilting component (7) for driving the casting to tilt and sink in sections to realize synchronous exhaust during the immersion process. A fixing component (8) is provided on one side of the dynamic tilting component (7). The fixing component (8) is provided with the casting body (9). The fixing component (8) is used to clamp and limit multiple sets of casting bodies (9).

2. The fluorescent penetrant testing equipment for castings according to claim 1, characterized in that: The translational feeding assembly (4) includes several first slide rails (41) and two first toothed plates (42) that are fixedly connected to the top of the support frame (1). Two slide plates (43) are slidably connected to the top of the several first slide rails (41). Two first servo motors (44) are fixedly connected to the top of each slide plate (43). The output ends of the two first servo motors (44) are rotatably connected to the two slide plates (43). The output ends of the two first servo motors (44) are fixedly connected to a first gear (45). The first gear (45) meshes with the first toothed plate (42). A crossbeam (46) is fixedly connected to the top of the two slide plates (43).

3. The fluorescent penetrant testing equipment for castings according to claim 2, characterized in that: The lifting assembly (5) includes a vertical plate (51) fixedly connected to one side of the crossbeam (46), a second servo motor (52) is installed on one side of the vertical plate (51), the output end of the second servo motor (52) is rotatably connected to the vertical plate (51), the output end of the second servo motor (52) is fixedly connected to a second gear (53), two second slide rails (56) are slidably connected to one side of the vertical plate (51), a lifting plate (55) is fixedly connected to one side of the two second slide rails (56), a second toothed plate (54) is fixedly connected to one side of the lifting plate (55), and the second gear (53) meshes with the second toothed plate (54).

4. The fluorescent penetrant testing device for castings according to claim 3, characterized in that: The vibration assembly (6) includes two mounting plates (61) that are fixedly connected to both sides of the second toothed plate (54). The bottom of the two mounting plates (61) is fixedly connected to a first connecting plate (62). The four corners of the bottom of the first connecting plate (62) are fixedly connected to a fixing cylinder (63). The four fixing cylinders (63) are slidably connected to a connecting rod (64). One end of the connecting rod (64) is fixedly connected to a spring (65), and the other end of the spring (65) is fixedly connected to the inner wall of the fixing cylinder (63). The bottom of the four connecting rods (64) is fixedly connected to a second connecting plate (66). The top of the second connecting plate (66) is equipped with a vibration motor (67). The bottom of the second connecting plate (66) is fixedly connected to two connecting frames (68), and the other side of the two connecting frames (68) is fixedly connected to a bearing frame (69). The bottom of the first connecting plate (62) is equipped with a vision sensor (610).

5. The fluorescent penetrant testing device for castings according to claim 4, characterized in that: The dynamic tilting assembly (7) includes a protective frame (71) fixedly connected to one side of the support frame (69). A third servo motor (72) is installed on one side of the support frame (69). The protective frame (71) covers the third servo motor (72). A first rotating shaft (73) is rotatably connected inside the support frame (69). Two second rotating shafts (74) are rotatably connected to both sides of the support frame (69). Two first timing pulleys (75) are fixedly connected to the outer wall of the first rotating shaft (73). Two second timing pulleys (76) are fixedly connected to the outer wall of the two second rotating shafts (74). The two first timing pulleys (75) and the two second timing pulleys (76) are respectively connected by timing belts (77).

6. The fluorescent penetrant testing equipment for castings according to claim 5, characterized in that: The fixing component (8) includes a grid frame (81) fixedly connected to one end of two second rotating shafts (74). A grid plate (82) is rotatably connected to one side of the grid frame (81). A threaded rod (83) is threadedly connected to the grid plate (82). The threaded rod (83) is threadedly connected to the grid frame (81). The grid frame (81) and the grid plate (82) are respectively attached to both sides of the casting body (9).

7. The fluorescent penetrant testing device for castings according to claim 1, characterized in that: The support platform (2) is provided with two movable sealing assemblies (10) on its top, which are used to enclose the casting body (9) to form a sealed pressurized cavity. The movable sealing assembly (10) includes a third slide rail (101) fixedly connected to the top of the support platform (2). A sliding rod (102) is slidably connected to the outer wall of the third slide rail (101). A movable frame (103) is fixedly connected to the top of the sliding rod (102). A positioning seat (104) is fixedly connected to the top of the support platform (2). A sealing frame is fixedly connected to one side of the movable frame (103). (105) A dual-axis cylinder (106) is installed on the inner wall of the moving frame (103). One of the output ends of the dual-axis cylinder (106) is fixedly connected to one side of the positioning seat (104). One of the output ends of the dual-axis cylinder (106) is slidably connected to the moving frame (103). The inner cavity of the moving frame (103) and the inner cavity of the sealing frame (105) form a first pressurization chamber (107). A solenoid valve (108) is connected to the top of the sealing frame (105). A pressure sensor (109) is installed inside the sealing frame (105).

8. The fluorescent penetrant testing equipment for castings according to claim 7, characterized in that: Each of the two movable sealing assemblies (10) is provided with an air intake and pressurization assembly (20) for compressing air and providing a pressurized air source. The air intake and pressurization assembly (20) includes a piston (201) slidably connected to the movable frame (103). The other output end of the dual-shaft cylinder (106) is fixedly connected to one side of the piston (201). Two guide rods (202) are fixedly connected to one side of the piston (201). Both guide rods (202) are slidably connected to the movable frame (103). An air intake pipe (203) is connected to one side of the movable frame (103). A first one-way valve (204) is installed on the air intake pipe (203). The movable frame (103) and the piston (201) form a second pressurization chamber (205).

9. The fluorescent penetrant testing equipment for castings according to claim 8, characterized in that: The permeation chamber (3) is equipped with a circumferential circulation blowing assembly (30) for lateral slow-release airflow and driving the fluorescent permeate to rotate and degas. The circumferential circulation blowing assembly (30) is connected to the movable sealing assembly (10). The circumferential circulation blowing assembly (30) includes a bellows (301) connected to one side of the movable frame (103), and the other end of the bellows (301) is connected to a connecting pipe (302). The bellows (301) is fixedly connected to the inner wall of the positioning seat (104), and the connecting pipe (302) is equipped with... There is a regulating valve (303), and the other end of the connecting pipe (302) is connected to a Y-shaped branch pipe (304). A support ring (306) is fixedly connected inside the infiltration box (3). Several L-shaped air outlet pipes (305) are evenly fixedly connected inside the support ring (306). Several L-shaped air outlet pipes (305) are all connected to the Y-shaped branch pipe (304). A second one-way valve (307) is installed on several L-shaped air outlet pipes (305). One end of several L-shaped air outlet pipes (305) is connected to a flat nozzle pipe (308).

10. A fluorescent penetrant testing device for castings according to claim 7, characterized in that: The bottom of the sealing frame (105) is inclined.

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