Turbine shell surface defect visual inspection device

Abstract

The utility model relates to industrial automation detection technical field discloses turbine shell surface defect vision detection device, including detection room, the inside fixedly connected with protection box of detection room, the top rotatoryly connected with fixed plate of protection box, the inside installation of fixed plate has clamping mechanism, the inside installation of protection box has adjusting mechanism, the top inside fixedly connected with industrial video camera of detection room, the clamping mechanism includes hollow column, the outer wall fixed connection of hollow column is in the inner wall of fixed plate, the inner wall fixed connection of hollow column has cylinder no.

Description

Technical Field

[0001] This utility model relates to the field of industrial automation inspection technology, and in particular to a visual inspection device for surface defects of turbine housings. Background Technology

[0002] The turbine housing surface defect visual inspection device is a specialized piece of equipment that utilizes machine vision technology to automate the inspection of turbine housing surface quality. It can replace traditional manual inspection, accurately identifying common defects such as pits and scratches on the turbine housing surface and determining whether the workpiece is qualified. This device is adaptable to different turbine housing models, achieving efficient operation through optimized inspection processes, significantly reducing the missed detection rate and inspection time. Simultaneously, it can record and present defect-related information, providing data support for subsequent quality traceability and production improvement.

[0003] A visual inspection device for turbine housing surface defects typically consists of an industrial camera, a light source, a motion stage, a main control unit, and a display. It utilizes machine vision technology to automate the assessment of turbine housing surface quality. During inspection, the turbine housing is first positioned to ensure it is in the appropriate inspection location. Then, clear images of the turbine housing surface are acquired using optical methods. Next, the device processes and analyzes the acquired images, employing specific algorithms to identify the presence of defects such as dents and scratches, and determining parameters such as the size and location of these defects. Finally, based on the analysis results, an inspection conclusion is output, determining whether the turbine housing meets quality standards. Relevant inspection data can also be recorded, providing a basis for subsequent quality control.

[0004] In existing technologies, wheel housings are mostly irregular curved surface structures with size differences. During inspection, they are prone to displacement and shaking due to external forces, equipment vibration, or the transportation process. This causes the images captured by industrial cameras to have positional shifts, blurring, or partial defocusing, making it difficult to accurately capture surface scratches, pits, and other defect features. Consequently, this leads to missed or false detections and reduces inspection accuracy. To address these issues, a visual inspection device for turbine housing surface defects is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a visual inspection device for turbine housing surface defects, which aims to improve the problem of turbine housing displacement and shaking during inspection in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A visual inspection device for surface defects of a turbine housing includes an inspection chamber, a protective box fixedly connected inside the inspection chamber, a fixed plate rotatably connected to the top of the protective box, a clamping mechanism installed inside the fixed plate, an adjustment mechanism installed inside the protective box, and an industrial camera fixedly connected to the top of the inspection chamber.

[0008] The clamping mechanism includes a hollow column, the outer wall of which is fixedly connected to the inner wall of the fixed plate. A cylinder is fixedly connected to the inner wall of the hollow column, and a rack is fixedly connected to the driving end of the cylinder. A gear is rotatably connected to the inner wall of the hollow column, and a disc is rotatably connected to the top of the gear. Multiple transmission rods are rotatably connected to the outer wall of each disc. Multiple mounting plates are fixedly connected to the inner wall of the hollow column, and multiple limiting plates are fixedly connected to the top of each mounting plate. A reset assembly is slidably connected to the outer wall of each of the multiple limiting plates.

[0009] Preferred configuration: The testing chamber provides a complete testing environment, with an internal protective box supporting a fixed plate and adjustment mechanism. An industrial camera is fixed to the top of the testing chamber and aligned with the testing area. In the clamping mechanism, a hollow column is fixed inside the fixed plate. A cylinder drives a rack to move, the rack meshes and drives a gear to rotate, the gear drives a disc to rotate, and the disc pushes a reset assembly to slide along a limiting plate through multiple transmission rods. Guided by the mounting plate and the limiting plate, the reset assembly achieves a stable clamping of the turbine housing. The adjustment mechanism can adjust the angle of the fixed plate, allowing the industrial camera to capture images of the turbine housing surface from all angles, completing defect detection.

[0010] As a further description of the above technical solution:

[0011] The reset assembly includes a sliding block, the inner wall of which is slidably connected to the outer wall of the limiting plate. Two guide rods are fixedly connected to the inner wall of the sliding block. Springs are sleeved on the outer walls of the two guide rods. Inclined blocks are slidably connected to the outer walls of the two guide rods. A fixing rod is fixedly connected to the inner wall of the sliding block. A V-shaped plate is rotatably connected to the outer wall of the fixing rod.

[0012] Preferably, the sliding block slides along the limiting plate, and the guide rod on its inner wall provides guidance for the spring and the inclined block; when clamping, the spring is compressed, and the inclined block pushes the V-shaped plate to rotate around the fixed rod to fit the turbine housing; when unlocking, the spring rebounds and drives the inclined block to reset, and the V-shaped plate is released, thus achieving stable clamping and flexible unlocking of the turbine housing.

[0013] As a further description of the above technical solution:

[0014] The adjustment mechanism includes a fixed block 1, the outer wall of which is fixedly connected to the inner wall of the protective box, a cylinder 2 rotatably connected to the inner wall of the fixed block 1, a fixed block 2 fixedly connected to the drive end of the cylinder 2, a connecting rod 1 rotatably connected to the inner wall of the fixed block 2, and a connecting rod 2 fixedly connected to the top end of the connecting rod 1.

[0015] Preferably, the fixing block 1 is fixed to the inner wall of the protective box, providing a stable rotation support point for the cylinder 2, ensuring that the cylinder 2 can flexibly adjust its angle; when the cylinder 2 extends or retracts, it drives the fixing block 2 to move, and the fixing block 2 provides rotation space for the connecting rod 1, so that the connecting rod 1 rotates while moving with the fixing block 2; the connecting rod 1 transmits power to the connecting rod 2 at the top, and through the rotation and movement of each component, it drives the external components connected to the connecting rod 2 to achieve precise adjustment of angle and position, thereby providing the detection device with a multi-directional detection perspective.

[0016] As a further description of the above technical solution:

[0017] Lighting devices are fixedly connected to both ends of the inner wall of the testing chamber. Light shields are fixedly connected to both sides of the bottom inner wall of the testing chamber. A turbine housing is detachably connected to the inner wall of the fixed plate. The outer teeth of the rack are meshed with the outer teeth of the gear. The bottom end of the disc is rotatably connected to the top end of the mounting plate.

[0018] Preferred configuration: The testing chamber provides stable lighting through a lighting device and a light shield, and the fixed plate supports the turbine housing; in the clamping mechanism, the rack and gear mesh, and the cylinder drives the rack to rotate the gear, and the disc rotates with the gear under the support of the mounting plate, providing power for the subsequent transmission rod to push the reset assembly to clamp the turbine housing.

[0019] As a further description of the above technical solution:

[0020] The opposite sides of the plurality of transmission rods are rotatably connected to the inner wall of the sliding block, and the outer wall of the sliding block is slidably connected to the inner wall of the hollow column;

[0021] Preferably, the rotation of the disc drives the transmission rod, and the opposite side of the transmission rod pushes the sliding block; the sliding block slides smoothly under the dual guidance of the hollow column inner wall and the limiting plate, converting the rotational power of the disc into linear motion, providing driving force for the reset assembly to approach and clamp the turbine housing.

[0022] As a further description of the above technical solution:

[0023] One end of the spring is fixedly connected to the inner wall of the sliding block, and the other end of the spring is fixedly connected to the outer wall of the inclined block. The outer wall of the V-shaped plate is rotatably connected to the inner wall of the sliding block.

[0024] Preferably, the two ends of the spring are fixed to the inner wall of the sliding block and the outer wall of the inclined block, respectively. The sliding block provides rotational support for the V-shaped plate. When clamping, the sliding block moves to make the V-shaped plate fit against the turbine housing, and the inclined block compresses the spring to store energy. When unlocking, the spring rebounds to push the inclined block to reset, which in turn causes the V-shaped plate to loosen, thus realizing flexible switching between clamping and resetting.

[0025] As a further description of the above technical solution:

[0026] One adjacent side of each of the V-shaped plates contacts the outer wall of the turbine housing, and the outer wall of the V-shaped plate contacts the left side of the inclined block;

[0027] Preferably, multiple V-shaped plates are in contact with the outer wall of the turbine housing on one side, thereby clamping and fixing the turbine housing; the outer wall of the V-shaped plate is in contact with the left side of the inclined block, and the inclined block applies pressure to the V-shaped plate under the action of the spring, which enhances the fit between the V-shaped plate and the turbine housing, ensures the stability of the clamping, and prevents the turbine housing from shifting during testing.

[0028] As a further description of the above technical solution:

[0029] The outer wall of the second connecting rod is slidably connected to the inner wall of the protective box, and the bottom end of the fixing plate is fixedly connected to the top end of the second connecting rod.

[0030] Preferably, the outer wall of the second connecting rod slides on the inner wall of the protective box, which provides guidance and limitation; the bottom end of the fixing plate is fixed to the top end of the second connecting rod, and when the second connecting rod moves, it drives the fixing plate to adjust the angle or position synchronously, so as to realize the flexible switching of the turbine housing inspection perspective.

[0031] This utility model has the following beneficial effects:

[0032] 1. In this utility model, a cylinder drives a rack to rotate a gear, causing a disc to push a sliding block of a reset assembly along a limiting plate via a transmission rod. When the V-shaped block contacts the turbine housing, the V-shaped block rotates along the outer wall of the turbine housing, causing the squeezing inclined block to move along a guide rod and the spring to compress it. When the V-shaped block separates from the turbine housing, the spring pushes the inclined block to reset the V-shaped plate, achieving a clamping effect. This keeps the turbine housing stably fixed in the preset detection position, preventing workpiece displacement due to equipment vibration or conveyor shaking. It ensures that the industrial camera always captures clear and accurate surface images, effectively reducing missed or false detections of defects caused by image offset and improving detection reliability.

[0033] 2. In this utility model, the fixed block 2 is moved by the driving end of the cylinder 2. The fixed block 2 drives the connecting rod 1, which is rotated and connected to the inner wall, to move along the arc-shaped sliding groove opened in the protective box. This causes the connecting rod 2 at the top of the connecting rod 1 to move synchronously, thereby realizing angle adjustment. Adjusting the angle can optimize the light incident direction, enhance the grayscale contrast between the defect and the substrate, highlight the edge contour of the scratch with side light, and highlight the difference in the depth of the pit with top light. This makes the defect features easier for the algorithm to identify, reduces misjudgment caused by improper angle, and ensures the stability and reliability of the test results. Attached Figure Description

[0034] Figure 1This is a three-dimensional schematic diagram of the visual inspection device for turbine housing surface defects proposed in this utility model;

[0035] Figure 2 This is a schematic diagram of the inspection chamber of the visual inspection device for turbine housing surface defects proposed in this utility model;

[0036] Figure 3 This is a schematic diagram of the hollow column structure of the visual inspection device for turbine housing surface defects proposed in this utility model;

[0037] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0038] Figure 5 This is a schematic diagram of the structure of the fixing block of the turbine housing surface defect visual inspection device proposed in this utility model.

[0039] Legend:

[0040] 1. Testing chamber; 2. Protective enclosure; 3. Fixing plate;

[0041] 4. Clamping mechanism; 41. Hollow column; 42. Cylinder 1; 43. Rack; 44. Gear; 45. Disc; 46. Transmission rod; 47. Mounting plate; 48. Limiting plate;

[0042] 49. Reset assembly; 491. Sliding block; 492. Guide rod; 493. Spring; 494. Inclined block; 495. Fixing rod; 496. V-shaped plate;

[0043] 5. Adjustment mechanism; 51. Fixing block one; 52. Cylinder two; 53. Fixing block two; 54. Connecting rod one; 55. Connecting rod two;

[0044] 6. Industrial camera; 7. Lighting device; 8. Light shield; 9. Turbine housing. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0046] A visual inspection device for surface defects in turbine housings, referring to... Figure 1 , Figure 3 and Figure 4The system includes a testing chamber 1, with a protective box 2 fixedly connected inside the testing chamber 1. The testing chamber 1 provides installation space and a protective environment for the protective box 2, ensuring that the protective box 2 is not affected by external interference. A fixed plate 3 is rotatably connected to the top of the protective box 2, providing rotational support for the fixed plate 3 and limiting the rotation range of the fixed plate 3. A clamping mechanism 4 is installed inside the fixed plate 3, providing a fixed base for the clamping mechanism 4 and ensuring that the clamping mechanism 4 is accurately aligned with the workpiece to be tested. An adjustment mechanism 5 is installed inside the protective box 2, providing a closed installation space for the adjustment mechanism 5 to prevent damage to the components of the adjustment mechanism 5. An industrial camera 6 is fixedly connected inside the top of the testing chamber 1, providing installation height and stable support for the industrial camera 6, ensuring that the camera lens is aligned with the testing area.

[0047] The clamping mechanism 4 includes a hollow column 41. The outer wall of the hollow column 41 is fixedly connected to the inner wall of the fixing plate 3. The fixing plate 3 provides a mounting point for the hollow column 41 to ensure the stability of the hollow column 41. A cylinder 42 is fixedly connected to the inner wall of the hollow column 41. The hollow column 41 provides fixed support for the cylinder 42 to ensure that the driving end of the cylinder 42 is precisely connected to the rack 43. The driving end of the cylinder 42 is fixedly connected to the rack 43. The cylinder 42 drives the rack 43 to move by extension and retraction. The rack 43 transmits power. A gear 44 is rotatably connected to the inner wall of the hollow column 41. The hollow column 41 provides rotational support for the gear 44 and limits the rotation center of the gear 44.

[0048] A disk 45 is rotatably connected to the top of the gear 44. The gear 44 drives the disk 45 to rotate synchronously. Multiple transmission rods 46 are rotatably connected to the outer wall of the disk 45. The disk 45 drives one end of the transmission rod 46 to move synchronously, converting the rotational power of the disk 45 into linear power. Multiple mounting plates 47 are fixedly connected to the inner wall of the hollow column 41. The hollow column 41 provides fixed support for the mounting plates 47, ensuring that the mounting plates 47 are symmetrically positioned. Multiple limiting plates 48 are fixedly connected to the top of the mounting plates 47. The mounting plates 47 provide vertical support for the limiting plates 48, ensuring accurate clamping position. Reset components 49 are slidably connected to the outer wall of the multiple limiting plates 48. The limiting plates 48 provide guidance for the sliding block 491 of the reset components 49, limiting the movement direction of the reset components 49.

[0049] The reset assembly 49 includes a sliding block 491. The inner wall of the sliding block 491 is slidably connected to the outer wall of the limiting plate 48. The limiting plate 48 provides a sliding track for the sliding block 491 to ensure smooth movement of the sliding block 491. Two guide rods 492 are fixedly connected to the inner wall of each sliding block 491. The sliding block 491 provides fixed support for the guide rods 492 to ensure that the guide rods 492 are parallel. A spring 493 is sleeved on the outer wall of each guide rod 492. The guide rods 492 limit the deformation direction of the springs 493 and prevent the springs 493 from deforming. 93. Twisting failure: Both guide rods 492 have slidably connected inclined blocks 494 on their outer walls. The guide rods 492 provide sliding guidance for the inclined blocks 494, ensuring that the inclined blocks 494 move axially. The inner wall of the sliding block 491 is fixedly connected to a fixing rod 495. The sliding block 491 provides fixed support for the fixing rod 495, ensuring that the fixing rod 495 is centered. The outer wall of the fixing rod 495 is rotatably connected to a V-shaped plate 496. The fixing rod 495 provides a rotation base for the V-shaped plate 496, ensuring that the V-shaped plate 496 can flexibly adjust its angle.

[0050] Specifically, the testing chamber 1 provides an overall installation and protective environment. The internal protective box 2 supports the fixing plate 3 and the adjustment mechanism 5. The clamping mechanism 4 on the fixing plate 3 is driven by the cylinder 42 to drive the rack 43 and gear 44, which in turn drives the disc 45 and the transmission rod 46 to push the reset assembly 49. The sliding block 491 of the reset assembly 49 moves along the limiting plate 48, and works with the guide rod 492, spring 493 and inclined block 494 to make the V-shaped plate 496 firmly clamp the workpiece to be tested. The industrial camera 6 is responsible for shooting the test. The adjustment mechanism 5 can adjust the angle of the fixing plate 3 to achieve all-round testing.

[0051] Reference Figure 1 , Figure 2 and Figure 5 The adjustment mechanism 5 includes a fixed block 51, the outer wall of which is fixedly connected to the inner wall of the protective box 2. The protective box 2 provides a stable installation base for the fixed block 51, ensuring that the position of the fixed block 51 does not shift. The inner wall of the fixed block 51 is rotatably connected to a cylinder 52. The fixed block 51 provides a rotation fulcrum for the cylinder 52 through its fixed state, ensuring that the cylinder 52 is stable when it moves. The drive end of the cylinder 52 is fixedly connected to a fixed block 53. The cylinder 52 drives the fixed block 53 to move synchronously through extension and retraction, thus transmitting power. The inner wall of the fixed block 53 is rotatably connected to a connecting rod 54. The fixed block 53 moves to drive one end of the connecting rod 54 to move synchronously, while providing rotation space for the connecting rod 54. The top end of the connecting rod 54 is fixedly connected to a connecting rod 55. The connecting rod 54 transmits power stably to the connecting rod 55 through its own rotation and displacement.

[0052] Specifically, the protective box 2 is fixedly supported by a fixing block 51, which provides a fulcrum for the rotation of the cylinder 52. The cylinder 52 extends and retracts, causing the fixing block 53 to move. The fixing block 53 causes the connecting rod 54 to move and provides it with rotation space. The connecting rod 54 transmits power to the connecting rod 55 at the top. Through the rotation and movement of each component, the angle and position of the external components connected to the connecting rod 55, such as the fixing plate 3, can be adjusted, providing a multi-angle perspective for detection.

[0053] Reference Figures 3 to 5 Lighting devices 7 are fixedly connected to both ends of the inner wall of the testing chamber 1. The testing chamber 1 provides symmetrical installation positions for the lighting devices 7 to ensure that the light covers the testing area. Light shields 8 are fixedly connected to both sides of the bottom inner wall of the testing chamber 1. The testing chamber 1 provides a fixed base for the light shields 8 and limits the installation range of the light shields 8. The inner wall of the fixing plate 3 is detachably connected to the turbine housing 9. The fixing plate 3 provides installation support for the turbine housing 9 and fixes its position through the clamping mechanism 4. The external teeth of the rack 43 are meshed with the external teeth of the gear 44. The rack 43 is driven to make linear motion by the cylinder 42, which drives the gear 44 to rotate. The bottom end of the disc 45 is rotatably connected to the top end of the mounting plate 47. The mounting plate 47 provides bottom support for the disc 45 and limits the rotation plane of the disc 45.

[0054] Multiple transmission rods 46 are rotatably connected to the inner wall of the sliding block 491 on opposite sides. The transmission rods 46 rotate with the disc 45 to push the sliding block 491. The outer wall of the sliding block 491 is slidably connected to the inner wall of the hollow column 41. The hollow column 41 provides a sliding track for the sliding block 491, limiting its range of movement. One end of the spring 493 is fixedly connected to the inner wall of the sliding block 491, and the other end of the spring 493 is fixedly connected to the outer wall of the inclined block 494. One end of the spring 493 is fixed to the inner wall of the sliding block 491, and the other end is fixed to the outer wall of the inclined block 494. The sliding block 491 provides a fixed support point for the spring 493.

[0055] The outer wall of the V-shaped plate 496 is rotatably connected to the inner wall of the sliding block 491. The sliding block 491 provides rotational support for the V-shaped plate 496 and limits its rotation fulcrum. The adjacent sides of multiple V-shaped plates 496 are in contact with the outer wall of the turbine housing 9. The V-shaped plate 496 is driven by the sliding block 491 to apply clamping force and fix the position of the turbine housing 9. The outer wall of the V-shaped plate 496 is in contact with the left side of the inclined block 494. The inclined block 494 applies pressure and resets the V-shaped plate 496 under the action of the spring 493. The outer wall of the connecting rod 2 55 is rotatably connected to the inner wall of the protective box 2. The protective box 2 provides rotation and sliding space for the connecting rod 2 55 and limits its range of motion. The bottom end of the fixing plate 3 is fixedly connected to the top end of the connecting rod 2 55. The connecting rod 2 55 drives the fixing plate 3 to adjust its angle and position synchronously through its own movement.

[0056] Specifically, the testing chamber 1 creates stable lighting through the lighting device 7 and the light shield 8, and the protective box 2 supports the adjustment mechanism 5 and the fixing plate 3; in the clamping mechanism 4, the cylinder 42 drives the rack 43 and gear 44 to drive the disc 45 and the transmission rod 46 to push the sliding block 491, which, together with the spring 493 and the inclined block 494, fixes the turbine housing 9 with the V-shaped plate 496; the adjustment mechanism 5 drives the connecting rod 55 to adjust the angle of the fixing plate 3 through the cylinder 52, the connecting rod 54, etc., and the industrial camera 6 completes multi-directional precise testing.

[0057] The implementation principle of this application embodiment is as follows: the rack 43 is driven to move by the cylinder 42, and the rack 43 meshes with the gear 44 rotatably connected inside the hollow column 41, driving the gear 44 to rotate, thereby causing the disc 45 at the top of the gear 44 to rotate synchronously; the disc 45 is rotatably connected to multiple transmission rods 46 through its outer wall, pushing the sliding block 491 of the corresponding reset component 49 to slide along the limiting plate 48 on the mounting plate 47; when the sliding block 491 drives the V-shaped plate 496 to approach and contact the turbine housing 9, the V-shaped plate 496 rotates around the fixed rod 495 to fit against the outer wall of the turbine housing 9, while squeezing the inclined block 494 to slide along the guide rod 492, so that the spring 493 is compressed and stored energy to achieve stable clamping; when it is necessary to release, the cylinder 42 resets and drives each component to move back, the V-shaped plate 496 disengages from the turbine housing 9, the spring 493 rebounds and pushes the inclined block 494 to drive the V-shaped plate 496 to reset, completing the entire clamping and reset cycle.

[0058] When cylinder 2 52 extends or retracts, it drives fixed block 2 53 to move. Fixed block 2 53 provides rotation space for connecting rod 1 54, so that connecting rod 1 54 rotates while moving with fixed block 2 53. Connecting rod 1 54 moves along the arc-shaped sliding groove opened in the inner wall of protective box 2, driving connecting rod 2 55. This drives the external component connected to connecting rod 2 55 to achieve angle adjustment. Adjusting the angle can optimize the light incident direction, enhance the grayscale contrast between defects and the substrate, side light can highlight the edge contour of scratches, and top light can highlight the difference in depth of pits, making defect features easier for algorithms to identify.

[0059] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A visual inspection device for surface defects of a turbine housing, comprising an inspection chamber (1), characterized in that: The testing chamber (1) is fixedly connected to a protective box (2), and a fixed plate (3) is rotatably connected to the top of the protective box (2). A clamping mechanism (4) is installed inside the fixed plate (3), and an adjustment mechanism (5) is installed inside the protective box (2). An industrial camera (6) is fixedly connected to the top of the testing chamber (1). The clamping mechanism (4) includes a hollow column (41), the outer wall of which is fixedly connected to the inner wall of the fixed plate (3), a cylinder (42) is fixedly connected to the inner wall of the hollow column (41), a rack (43) is fixedly connected to the driving end of the cylinder (42), a gear (44) is rotatably connected to the inner wall of the hollow column (41), a disc (45) is rotatably connected to the top of the gear (44), a plurality of transmission rods (46) are rotatably connected to the outer wall of the disc (45), a plurality of mounting plates (47) are fixedly connected to the inner wall of the hollow column (41), a plurality of limiting plates (48) are fixedly connected to the top of the mounting plates (47), and a reset assembly (49) is slidably connected to the outer wall of the plurality of limiting plates (48).

2. The visual inspection device for turbine housing surface defects according to claim 1, characterized in that: The reset assembly (49) includes a sliding block (491), the inner wall of which is slidably connected to the outer wall of the limiting plate (48). The inner wall of the sliding block (491) is fixedly connected to two guide rods (492), the outer walls of the two guide rods (492) are fitted with springs (493), the outer walls of the two guide rods (492) are slidably connected to inclined blocks (494), the inner wall of the sliding block (491) is fixedly connected to a fixing rod (495), and the outer wall of the fixing rod (495) is rotatably connected to a V-shaped plate (496).

3. The visual inspection device for turbine housing surface defects according to claim 1, characterized in that: The adjustment mechanism (5) includes a fixing block (51), the outer wall of which is fixedly connected to the inner wall of the protective box (2), the inner wall of which is rotatably connected to a cylinder (52), the driving end of which is fixedly connected to a fixing block (53), the inner wall of which is rotatably connected to a connecting rod (54), and the top end of which is fixedly connected to a connecting rod (55).

4. The visual inspection device for turbine housing surface defects according to claim 2, characterized in that: Lighting devices (7) are fixedly connected to both the left and right ends of the inner wall of the testing chamber (1). Light shields (8) are fixedly connected to both the left and right sides of the bottom inner wall of the testing chamber (1). A turbine housing (9) is detachably connected to the inner wall of the fixing plate (3). The outer teeth of the rack (43) are meshed with the outer teeth of the gear (44). The bottom end of the disc (45) is rotatably connected to the top end of the mounting plate (47).

5. The turbine housing surface defect visual inspection device according to claim 2, characterized in that: The opposite sides of the plurality of transmission rods (46) are rotatably connected to the inner wall of the sliding block (491), and the outer wall of the sliding block (491) is slidably connected to the inner wall of the hollow column (41).

6. The visual inspection device for turbine housing surface defects according to claim 2, characterized in that: One end of the spring (493) is fixedly connected to the inner wall of the sliding block (491), and the other end of the spring (493) is fixedly connected to the outer wall of the inclined block (494). The outer wall of the V-shaped plate (496) is rotatably connected to the inner wall of the sliding block (491).

7. The turbine housing surface defect visual inspection device according to claim 4, characterized in that: The adjacent sides of the plurality of V-shaped plates (496) are in contact with the outer wall of the turbine housing (9), and the outer wall of the V-shaped plates (496) is in contact with the left side of the inclined block (494).

8. The visual inspection device for turbine housing surface defects according to claim 3, characterized in that: The outer wall of the second connecting rod (55) is rotatably connected to the inner wall of the protective box (2), and the bottom end of the fixing plate (3) is fixedly connected to the top end of the second connecting rod (55).

Images