A multi-angle visual inspection device for engine blades

Abstract

The present invention discloses a multi-angle vision detection device for engine blades, which relates to the technical field of vision detection. It includes a support frame. A connecting rod is installed at the top left end of the support frame. A bottom plate is installed inside the support frame through an electric cylinder. A cover shell is installed at the top of the bottom plate. A fixing ring is installed at the bottom of the inner wall of the cover shell. A first fixing frame is installed at the front end and the right end of the support frame. A second fixing frame is installed at the rear end of the support frame. A third fixing frame is installed at the end of the connecting rod. A moving platform is installed at the top of the second fixing frame and the side end of the third fixing frame. In the present invention, through the three-color light source arranged in the light source cover, light of different colors can be used to irradiate the surface of an object at different angles. The reflection angles formed in different regions are different, and light rays of different color components will be reflected back to the vision detection head, so that a distinct color contrast is formed on the surface of the photographed object, highlighting the three-dimensional features of the object.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-angle visual inspection of engine blades, and particularly to a multi-angle visual inspection device for engine blades. Background Technique

[0002] Engine blades, especially those of aero-engines, are key components of aero-engines. They serve under harsh working conditions such as high temperature, high pressure, high-speed rotation, and high-frequency vibration for a long time. As the core components of aero-engines, the manufacturing precision and surface quality of engine blades directly affect the performance and safety of the engines. Their quality directly affects the performance and lifespan of aero-engines, and even relates to flight safety. Therefore, it is crucial to accurately and comprehensively inspect engine blades. When using image processing to detect surface defects of metal parts, the primary problem is to clearly image the part surface. In the field of computer vision, a light source is usually used to irradiate the part, and then the surface image of the part is collected by a camera. Therefore, the selection of the imaging system hardware is particularly critical.

[0003] First of all, for the detection requirements of metal parts, if a traditional point light source or surface light source is used to irradiate the part during the image acquisition process, due to the smooth surface of the metal part, strong reflection will occur in some areas, resulting in a light spot area in the image. To deal with the reflection, a polarizer is usually used to weaken the reflection, but the light spot cannot be completely eliminated. Secondly, the detection of surface defects of parts usually requires 100% coverage of the product surface. However, metal parts usually have a complex spatial structure, and using a fixed-position camera to take pictures cannot cover all the surface information of the metal part. When detecting workpieces of different sizes, it is inconvenient to adjust the position of the visual inspection head according to the size of the workpiece with the existing equipment. If the distance between the inspection head and the blade is too far, the image may become blurred in details due to the reduced imaging ratio. If the distance is too close, it may be unfavorable for completely photographing the blade, and it is easy for some areas to be out of focus and blurred. Although the wrapped diffused light source can ensure uniform illumination at each position of the part to be inspected, a change in the position of the inspection head may cause a change in the light-receiving angle of some parts of the blade. If the inspection head is close to the light source, the illumination on the blade surface may be too strong, causing the image to be too bright and details to be lost; if the inspection head is far from the light source, the illumination may be insufficient, making the image too dark and affecting defect recognition.

[0004] In view of the above problems, there is an urgent need for innovative design on the original basis. Summary of the Invention

[0005] The object of the present invention is to provide a multi-angle vision detection device for engine blades, so as to solve the problems proposed in the above background technology that when using traditional point light sources or surface light sources to irradiate parts, strong reflections will occur in some areas, and the existing devices are not convenient to adjust the position of the vision detection head according to the size of the workpiece. However, changing the position of the detection head may cause the light-receiving angle of some parts of the blade to change. The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution significantly different from the existing technology.

[0006] To achieve the above object, the present invention provides the following technical solution: A multi-angle vision detection device for engine blades, including a support frame. A connecting rod is installed at the top left end of the support frame. A bottom plate is installed inside the support frame through an electric cylinder. A cover shell is installed at the top of the bottom plate. A fixing ring is installed at the bottom of the inner wall of the cover shell. A first fixing frame is installed at the front end and the right end of the support frame. A second fixing frame is installed at the rear end of the support frame. A third fixing frame is installed at the end of the connecting rod. A moving platform is installed at the top of the second fixing frame and the side end of the third fixing frame. A second support platform slides on the moving platform at the top of the first fixing frame and the side end of the third fixing frame. A first support platform slides inside the moving platform at the top of the second fixing frame. A vision detection head is installed at the top of the second support platform. A moving adjustment component is arranged at the top of the first support platform. A sleeve cover is slidably limited at the end of the vision detection head. An electric push rod is installed at the side end of the vision detection head;

[0007] A light source adjustment mechanism, the light source adjustment mechanism includes an adjustment plate installed at the end of the vision detection head, and an installation rod is installed on the surface of the end of the vision detection head. It also includes a connecting platform and a sleeve ring installed inside the sleeve cover, and a light-adjusting plate is rotatably connected inside the sleeve ring.

[0008] Preferably, an electric cylinder is installed above the cover shell on the side of the connecting rod close to the bottom plate, and a light source cover is installed at the extending end of the electric cylinder.

[0009] Preferably, the cover shell is designed in a hemispherical shape. Observation ports parallel to the bottom plate are opened on the front end and the right end surfaces of the cover shell. An observation port at a 45° angle to the bottom plate is opened at the rear end of the cover shell. An observation port perpendicular to the cover shell is opened at the top of the cover shell.

[0010] Preferably, mounting frames are installed on the top surface and the rear surface of the cover shell, and a cover plate is rotatably connected inside the mounting frame. The number of cover plates is four groups.

[0011] Preferably, a lead screw is installed inside the moving platform through a motor. The second support platform is threadedly connected to the lead screws installed in the moving platforms at the top of the first fixing frame and the side end of the third fixing frame. The first support platform is threadedly connected to the lead screw installed in the moving platform at the top of the second fixing frame.

[0012] Preferably, the moving adjustment assembly includes a first oil tank installed in the first support platform. A first piston rod is limited and slidably arranged inside the first oil tank. The end of the first piston rod is connected to the inner wall of the moving platform installed at the top of the second fixing frame. A rotating plate is rotatably connected to the top of the first support platform. A second oil tank is installed at the top of the first support platform. A second piston rod is limited and slidably arranged inside the second oil tank. A chute is formed at the back end of the rotating plate. A slider is limited and slidably arranged inside the chute. The slider is rotatably connected to the end of the second piston rod. A vision detection head is installed on the upper surface of the rotating plate.

[0013] Preferably, a limiting strip is installed on the surface of the end of the vision detection head for the limiting and sliding of the mounting rod. A sleeve cover is limited and slidably arranged at the end of the vision detection head. The extending end of the electric push rod is connected to the back end of the sleeve cover. The adjusting plate is connected to the lens of the vision detection head through a thin rod. A resisting ring is installed in the middle of the inner wall of the sleeve cover. The sleeve ring is located at one end of the sleeve cover away from the vision detection head. A connecting platform is installed at one end of the mounting rod.

[0014] Preferably, convex strips are installed on the edge of the adjusting plate. Chutes are formed inside the convex strips. The mounting rod is limited and slidably arranged in the chutes on the surface of the convex strips. The number of the resisting rings is two groups. The adjusting plate is located in the gap between the two groups of resisting rings. The number of the mounting rods is six groups. The six groups of mounting rods are circumferentially distributed on the surface of the end of the sleeve cover. The number of the light-adjusting plates is six groups. The six groups of light-adjusting plates are evenly circumferentially distributed inside the sleeve ring.

[0015] Preferably, a notch is formed inside the connecting platform. The back end of the light-adjusting plate is located inside the notch of the connecting platform. A mirror sticker is arranged on the surface of the light-adjusting plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. In the present invention, by arranging three-color light sources inside the lamp source cover, light of different colors can be used to irradiate the surface of an object at different angles. Different reflection angles are formed in different areas, and light rays of different color components will be reflected back to the vision detection head, so that a distinct color contrast is formed on the photographed object surface, highlighting the three-dimensional features of the object. A wrapped diffused light source is arranged inside the shell, and the part detection position is set in the central area inside the light source to ensure the consistency of the light illumination at each position of the part to be detected, effectively solving the problem of strong reflection. The present solution designs a multi-angle synchronous image acquisition scheme to take pictures of the part, including taking pictures in the vertical direction, taking pictures with two horizontal cameras, and taking pictures at a 45-degree angle, which can effectively solve the problem of the complex structure of the part, ensuring both the integrity of the coverage of the part surface and the consistency of the image acquisition of each camera.

[0018] 2. In the present invention, through the provided moving and adjusting component, the position of the vision detection head can be adjusted according to the size of the workpiece, and it can be ensured that the vision detection head is always aligned with the observation port on the surface of the housing during movement. The position of the vision detection head can be flexibly adjusted according to workpieces of different sizes, enabling the detection system to adapt to the detection of more types of workpieces, improving the flexibility of the equipment. The relative position between the vision detection head and the observation port on the surface of the housing remains constant, ensuring the consistency and stability of the field of view during the detection process.

[0019] 3. In the present invention, through the provided light source adjusting mechanism, when the vision detection head is far from the light source, as the distance increases, the light will gradually weaken during propagation, resulting in a decrease in the light intensity received by the vision detection head. The anti-arc surface at the end of the vision detection head is designed such that the arc surface can increase the contact area between the light and the end of the detection head, thereby improving the light reflection efficiency. When the light irradiates on the anti-arc surface, due to the special shape of the arc surface, the light will be more widely reflected and scattered, enabling more light to enter the vision detection head to make up for the weakening of the light intensity caused by the increased distance. When the vision detection head is close to the light source, when the vision detection head is close to the diffuse reflection light source, the light may be too strong, resulting in overexposure of the captured photo. The arc surface design at the end of the vision detection head can change the propagation direction of the light, causing the light to scatter and reflect on the arc surface. This scattering and reflection effect can effectively disperse the strong light and reduce the light intensity directly irradiating on the camera lens, thereby avoiding overexposure of the photo. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the main structure of one perspective of the present invention;

[0021] Figure 2 is a schematic diagram of the main structure of another perspective of the present invention;

[0022] Figure 3 is a schematic diagram of a partial structure of the housing of the present invention;

[0023] Figure 4 is an exploded structure diagram of the housing of the present invention;

[0024] Figure 5 is a schematic diagram of the structure of the support frame and the connecting rod of the present invention;

[0025] Figure 6 is a schematic diagram of the structure of the first fixing frame and the second fixing frame of the present invention;

[0026] Figure 7 is a schematic diagram of a partial structure of the second fixing frame of the present invention;

[0027] Figure 8 In the present invention Figure 7 is an enlarged structure diagram of part A;

[0028] Figure 9 This is a schematic diagram of the main structure of the vision detection head of the present invention;

[0029] Figure 10 This is a schematic diagram of the partial structure of the vision detection head of the present invention;

[0030] Figure 11 For the present invention Figure 10 An enlarged schematic diagram of part B in;

[0031] Figure 12 This is an exploded schematic diagram of the vision detection head of the present invention.

[0032] In the figure: 1, support frame; 2, connecting rod; 3, bottom plate; 4, cover shell; 5, mounting frame; 6, cover plate; 7, fixing ring; 8, first fixing frame; 9, second fixing frame; 10, third fixing frame; 11, moving table; 12, first support table; 13, second support table; 14, vision detection head; 151, first oil tank; 152, first piston rod; 153, rotating plate; 154, second oil tank; 155, second piston rod; 16, sleeve cover; 17, electric push rod; 181, adjusting plate; 182, mounting rod; 183, abutting ring; 184, connecting table; 185, collar; 186, light-adjusting plate. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1-12, the present invention provides a technical solution: a multi-angle vision detection device for engine blades, including a support frame 1. A connecting rod 2 is installed at the top left end of the support frame 1. A bottom plate 3 is installed inside the support frame 1 through an electric cylinder. A housing 4 is installed at the top of the bottom plate 3. A fixed ring 7 is installed at the bottom of the inner wall of the housing 4. A first fixing frame 8 is installed at the front end and the right end of the support frame 1. A second fixing frame 9 is installed at the rear end of the support frame 1. A third fixing frame 10 is installed at the end of the connecting rod 2. A moving platform 11 is installed at the top of the second fixing frame 9 and the side end of the third fixing frame 10. A second support platform 13 slides on the moving platform 11 at the top of the first fixing frame 8 and the side end of the third fixing frame 10. A first support platform 12 slides inside the moving platform 11 at the top of the second fixing frame 9. A vision detection head 14 is installed at the top of the second support platform 13. A moving adjustment component is arranged at the top of the first support platform 12. A sleeve 16 is slidably limited at the end of the vision detection head 14. An electric push rod 17 is installed at the side end of the vision detection head 14;

[0035] A light source adjustment mechanism, the light source adjustment mechanism includes an adjustment plate 181 installed at the end of the vision detection head 14, an installation rod 182 is installed on the surface of the end of the vision detection head 14. It also includes a connection table 184 and a sleeve ring 185 installed inside the sleeve 16. A light adjustment plate 186 is rotatably connected inside the sleeve ring 185. The light source adjustment component can not only avoid the problem that when the vision detection head 14 is far from the light source, as the distance increases, the light will gradually weaken during the propagation process, but also when the vision detection head 14 is close to the light source, when the vision detection head 14 is close to the diffuse reflection light source, the light may be too strong.

[0036] As an implementation manner of the present invention, an electric cylinder is installed above the housing 4 on the side of the connecting rod 2 close to the bottom plate 3. The extending end of the electric cylinder is installed with a light source cover, and a three-color tower-shaped light source is installed inside the light source cover. The three-color light source enhances the detection effect through the combination of red, green, and blue colors and multi-angle illumination. The three-color light source irradiates the surface of the object at different angles with different colors of light. The formed reflection angles in different areas are different, and the light of different color components will be reflected back to the vision detection head 14, so that a distinct color contrast is formed on the surface of the photographed object, highlighting the three-dimensional characteristics of the object;

[0037] As an implementation mode of the present invention, the housing 4 is designed in a hemispherical shape. Observation ports parallel to the bottom plate 3 are provided on the front end and the right end surface of the housing 4, which are located on the spherical surface 25 mm away from the bottom. The front end and the right end of the housing 4 form a 90° angle with the bottom plate 3. An observation port forming a 45° angle with the bottom plate 3 is provided at the rear end of the housing 4. An observation port perpendicular to the housing 4 is provided at the top end of the housing 4. The housing 4 is integrally hemispherical, with a circular radius of 123 mm at the bottom, and is coated with a highly reflective material inside. A diffuse reflection light source LED lamp bead is installed inside the fixing ring 7 and irradiates directly upward. The inner wall of the light source hemisphere structure is coated with a highly reflective material. After the light is reflected multiple times by the inner wall of the light source, uniform diffuse reflection light is formed to form an integrating sphere light source. After the part enters the light source, four vision detection heads 14 take a set (4 pieces) of photos. After the part rotates 180° along the z-axis, the vision detection heads 14 take another set (4 pieces) of photos. These 8 photos can completely cover the outer surface of the part. In order to weaken the problem that the imaging of the part edge is unclear due to the diffraction of light during photographing, an absorbing material is arranged on the opposite side of the camera in the integrating sphere light source, and the part is photographed by a multi-angle synchronous image acquisition scheme, which is divided into vertical direction photographing, horizontal double-camera photographing, and 45-degree angle photographing, ensuring both the integrity of the coverage of the part surface and the consistency of image acquisition by each camera;

[0038] As an implementation mode of the present invention, mounting brackets 5 are installed on the top end surface and the rear end surface of the housing 4. A cover plate 6 is rotatably connected inside the mounting bracket 5. The number of cover plates 6 is four groups. When the four vision detection heads 14 acquire images, the corresponding light source cover plates 6 are sequentially opened;

[0039] As an implementation mode of the present invention, a lead screw is installed inside the moving table 11 through a motor. The second support table 13 is threadedly connected to the lead screw installed inside the moving table 11 at the top end of the first fixing bracket 8 and the side end of the third fixing bracket 10. The first support table 12 is threadedly connected to the lead screw installed inside the moving table 11 at the top end of the second fixing bracket 9. By rotating the lead screw, the position of the vision detection heads 14 can be adjusted according to the size of the workpiece;

[0040] As an implementation manner of the present invention, the mobile adjustment assembly includes a first oil tank 151 installed in the first support table 12. A first piston rod 152 is limited and slid inside the first oil tank 151. The end of the first piston rod 152 is connected to the inner wall of the moving table 11 installed at the top of the second fixing frame 9. A rotating plate 153 is rotatably connected to the top of the first support table 12. A second oil tank 154 is installed at the top of the first support table 12. A second piston rod 155 is limited and slid inside the second oil tank 154. A chute is formed at the back end of the rotating plate 153. A slider is limited and slid inside the chute. The slider is rotatably connected to the end of the second piston rod 155. A vision detection head 14 is installed on the upper surface of the rotating plate 153. By providing the mobile adjustment assembly, the position of the vision detection head 14 can be adjusted according to the size of the workpiece, and it can be ensured that the vision detection head 14 always aligns with the observation port on the surface of the housing 4 during the movement. The position of the vision detection head 14 is flexibly adjusted according to workpieces of different sizes, so that the detection system can adapt to the detection of more types of workpieces, improving the flexibility of the equipment;

[0041] As an implementation manner of the present invention, a limiting strip is installed on the end surface of the vision detection head 14 for the limiting and sliding of the mounting rod 182. The sleeve cover 16 is limited and slid on the end of the vision detection head 14. The extending end of the electric push rod 17 is connected to the back end of the sleeve cover 16. The adjusting plate 181 is connected to the lens of the vision detection head 14 through a thin rod. A resisting ring 183 is installed in the middle of the inner wall of the sleeve cover 16. The sleeve ring 185 is located at one end of the sleeve cover 16 away from the vision detection head 14. A connecting platform 184 is installed at one end of the mounting rod 182. The adjusting plate 181 and the thin rod are both made of transparent acrylic material. The electric push rod 17 pushing the sleeve cover 16 to slide can adjust the radian of the adjusting plate 181;

[0042] When irradiating parts with traditional point light sources or surface light sources, strong reflections will occur in some areas. The existing equipment is not convenient to adjust the position of the vision detection head 14 according to the size of the workpiece. However, a change in the position of the detection head may cause a change in the light-receiving angle of some parts of the blade. The specific implementation method is as follows. During detection, first, the electric cylinder on the side of the connecting rod 2 pushes the lamp source cover to move to the top of the workpiece. The three-color light source in the lamp source cover irradiates the surface of the workpiece, and the vision detection head 14 detects the workpiece. Subsequently, the lamp source cover is retracted by the electric cylinder, and the electric cylinder inside the support frame 1 pushes the housing 4 to move to the upper end of the workpiece until the vision detection head 14 coincides with the detection hole. The diffuse reflection light inside the housing 4 irradiates the surface of the workpiece, and the vision detection head 14 detects the workpiece. When detecting a smaller workpiece, the lead screw inside the moving table 11 is rotated clockwise by the motor. The lead screws inside the first fixing frame 8 and the third fixing frame 10 are rotated clockwise to control the second support table 13 to drive the vision detection head 14 to move towards the housing 4. The lead screw inside the second fixing frame 9 rotates to control the moving table 11 to move towards the housing 4. The movement of the moving table 11 pulls the first piston rod 152, and the oil in the first oil tank 151 is injected into the second oil tank 154. The oil in the second oil tank 154 pushes the second piston rod 155 to extend. The slider at the end of the second piston rod 155 slides in the chute on the back end of the rotating plate 153 to adjust the angle of the vision detection head 14 on the surface of the rotating plate 153. While the lead screw is rotated by the motor, the extended end of the electric push rod 17 pulls the sleeve cover 16 to move away from the housing 4. The abutting ring 183 inside the sleeve cover 16 presses against the edge of the adjusting plate 181 to form an arc surface. When the light passes through the arc surface, it diverges. When the sleeve cover 16 moves away from the housing 4, the connecting platform 184 at the end of the mounting rod 182 abuts against the back end of the light-adjusting plate 186, causing the light-adjusting plate 186 to rotate towards the adjusting plate 181 inside the sleeve ring 185;

[0043] When inspecting a larger workpiece, the internal screw of the movable platform 11 is controlled by the motor to rotate counterclockwise, and the internal screws of the first fixed frame 8 and the third fixed frame 10 rotate counterclockwise to control the second support platform 13 to drive the visual inspection head 14 to move away from the cover 4. The internal screw of the second fixed frame 9 rotates to control the movable platform 11 to move away from the cover 4. The movable platform 11 moves to squeeze the first piston rod 152, and the oil in the second oil tank 154 is injected into the first oil tank 151. The oil in the second oil tank 154 is reduced to pull the second piston rod 155 back, and the end slider of the second piston rod 155 slides in the back end slide groove of the rotating plate 153. The angle of the visual inspection head 14 on the surface of the rotating plate 153 is adjusted. When the motor drives the screw rod to rotate, the extended end of the electric push rod 17 pushes the cover 16 to move toward one end of the cover shell 4. The internal contact ring 183 of the cover 16 presses against the edge of the adjustment plate 181 to form an anti-arc surface. The light is gathered when passing through the arc surface. When the cover 16 moves toward one end of the cover shell 4, the end of the mounting rod 182 and the connecting platform 184 contact the back end of the dimming plate 186, so that the dimming plate 186 rotates inside the ring 185 away from the adjustment plate 181. Then, the cover plate 6 is opened in sequence in the mounting frame 5 by the motor, so that the four groups of visual inspection heads 14 inspect the surface of the workpiece in sequence.

[0044] As an embodiment of the present invention, a convex strip is installed on the edge of the adjustment plate 181, and a sliding groove is provided inside the convex strip. The mounting rod 182 is limited to slide in the sliding groove on the surface of the convex strip. The number of the abutment ring 183 is two groups, and the adjustment plate 181 is located in the gap between the two groups of abutment rings 183. The number of the mounting rods 182 is six groups, and the six groups of mounting rods 182 are distributed in a circular shape on the end surface of the cover 16. The number of the dimming plates 186 is six groups, and the six groups of dimming plates 186 are evenly distributed in a circular shape inside the sleeve ring 185. The six groups of mounting rods 182 are limited to slide in the internal sliding grooves of the six groups of convex strips on the edge of the adjustment plate 181 to ensure that the curvature of the adjustment plate 181 is adjusted more evenly. A notch is provided inside the connecting platform 184, and the back end of the dimming plate 186 is located in the internal notch of the connecting platform 184. The surface of the dimming plate 186 is provided with a mirror sticker. The establishment of the six groups of dimming plates 186 can gather or diffuse the light source when the visual detection head 14 is far away or close to the light source.

[0045] Working principle: During detection, first, the electric cylinder at the side end of the connecting rod 2 pushes the light source cover to move to the top of the workpiece. The three-color light source inside the light source cover irradiates the surface of the workpiece, and the vision detection head 14 detects the workpiece. Subsequently, the light source cover is retracted by the electric cylinder. The electric cylinder inside the support frame 1 pushes the housing 4 to move to the upper end of the workpiece until the vision detection head 14 coincides with the detection hole. The diffuse reflection light inside the housing 4 irradiates the surface of the workpiece, and the vision detection head 14 detects the workpiece. When detecting a smaller workpiece, the motor controls the screw rod inside the moving table 11 to rotate clockwise. The screw rods inside the first fixing frame 8 and the third fixing frame 10 rotate clockwise to control the second support platform 13 to drive the vision detection head 14 to move towards the housing 4. The screw rod inside the second fixing frame 9 rotates to control the moving table 11 to move towards the housing 4. The movement of the moving table 11 pulls the first piston rod 152, and the oil liquid inside the first oil tank 151 is injected into the second oil tank 154. The oil liquid inside the second oil tank 154 pushes the second piston rod 155 to extend. The slider at the end of the second piston rod 155 slides in the chute on the back end of the rotating plate 153 to adjust the angle of the vision detection head 14 on the surface of the rotating plate 153. While the motor drives the screw rod to rotate, the extending end of the electric push rod 17 pulls the sleeve cover 16 to move away from the housing 4. The abutting ring 183 inside the sleeve cover 16 presses against the edge of the adjusting plate 181 to form an arc surface. When the light passes through the arc surface, it diverges. When the sleeve cover 16 moves away from the housing 4, the connecting platform 184 at the end of the mounting rod 182 abuts against the back end of the light-adjusting plate 186, causing the light-adjusting plate 186 to rotate towards the adjusting plate 181 inside the sleeve ring 185;

[0046] When detecting a larger workpiece, the motor controls the screw rod inside the moving table 11 to rotate counterclockwise. The screw rods inside the first fixing frame 8 and the third fixing frame 10 rotate counterclockwise to control the second support platform 13 to drive the vision detection head 14 to move away from the housing 4. The screw rod inside the second fixing frame 9 rotates to control the moving table 11 to move away from the housing 4. The movement of the moving table 11 squeezes the first piston rod 152, and the oil liquid inside the second oil tank 154 is injected into the first oil tank 151. The reduction of the oil liquid inside the second oil tank 154 pulls the second piston rod 155 to retract. The slider at the end of the second piston rod 155 slides in the chute on the back end of the rotating plate 153 to adjust the angle of the vision detection head 14 on the surface of the rotating plate 153. While the motor drives the screw rod to rotate, the extending end of the electric push rod 17 pushes the sleeve cover 16 to move towards the housing 4. The abutting ring 183 inside the sleeve cover 16 presses against the edge of the adjusting plate 181 to form a reverse arc surface. When the light passes through the arc surface, it converges. When the sleeve cover 16 moves towards the housing 4, the connecting platform 184 at the end of the mounting rod 182 abuts against the back end of the light-adjusting plate 186, causing the light-adjusting plate 186 to rotate away from the adjusting plate 181 inside the sleeve ring 185. Subsequently, the motor sequentially opens the cover plate 6 in the mounting frame 5, enabling the four groups of vision detection heads 14 to sequentially detect the surface of the workpiece.

[0047] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Although the present invention 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-angle visual inspection device for engine blades, comprising a support frame (1), characterized in that: A connecting rod (2) is installed at the top left side of the support frame (1); a bottom plate (3) is installed inside the support frame (1) via an electric cylinder; a cover (4) is installed at the top of the bottom plate (3); a fixing ring (7) is installed at the bottom of the inner wall of the cover (4); a first fixing frame (8) is installed at the front end and the right end of the support frame (1); a second fixing frame (9) is installed at the rear end of the support frame (1); a third fixing frame (10) is installed at the end of the connecting rod (2); and a movable frame (7) is installed at the top of the second fixing frame (9) and the side end of the third fixing frame (10). A movable table (11), a second support table (13) is slidably provided on the top of the first fixed frame (8) and the movable table (11) at the side end of the third fixed frame (10), a first support table (12) is slidably provided in the movable table (11) at the top end of the second fixed frame (9), a visual inspection head (14) is installed at the top end of the second support table (13), a movable adjustment component is provided at the top end of the first support table (12), a cover (16) is provided at the end of the visual inspection head (14) for limiting sliding, and an electric push rod (17) is installed at the side end of the visual inspection head (14); A light source adjustment mechanism, the light source adjustment mechanism comprising an adjustment plate (181) mounted on the end of the visual inspection head (14), a mounting rod (182) mounted on the surface of the end of the visual inspection head (14), and also comprising a connecting platform (184) and a collar (185) mounted inside the cover (16), a dimming plate (186) rotatably connected inside the collar (185), a limit strip mounted on the surface of the end of the visual inspection head (14) for limiting the sliding of the mounting rod (182), and the cover (16) being mounted on the end of the visual inspection head (14). The electric push rod (17) is connected to the back end of the cover (16) through a thin rod, and the adjustment plate (181) is connected to the lens of the visual inspection head (14). A resistance ring (183) is installed in the middle of the inner wall of the cover (16). The ring (185) is located at the end of the cover (16) away from the visual inspection head (14). A connecting platform (184) is installed at one end of the mounting rod (182). The resistance ring (183) is provided in two groups, and the adjustment plate (181) is located in the gap between the two groups of resistance rings (183).

2. The multi-angle visual inspection device for engine blades according to claim 1, characterized in that: An electric cylinder is installed on one side of the connecting rod (2) close to the bottom plate (3) and located above the cover shell (4), and a light source cover is installed on the protruding end of the electric cylinder.

3. The multi-angle visual inspection device for engine blades according to claim 1, characterized in that: The cover shell (4) is of hemispherical design, the front end and right end surfaces of the cover shell (4) are provided with observation ports parallel to the bottom plate (3), the rear end of the cover shell (4) is provided with an observation port at an angle of 45° to the bottom plate (3), and the top end of the cover shell (4) is provided with an observation port perpendicular to the cover shell (4).

4. The multi-angle visual inspection device for engine blades according to claim 1, characterized in that: A mounting frame (5) is mounted on the top surface and the rear end surface of the cover shell (4), and a cover plate (6) is rotatably connected inside the mounting frame (5), and the number of the cover plates (6) is four groups.

5. The multi-angle visual inspection device for engine blades according to claim 1, characterized in that: A screw is installed inside the movable platform (11) via a motor; the second support platform (13) is threadedly connected to a screw installed in the movable platform (11) at the top of the first fixed frame (8); the second support platform (13) is threadedly connected to a screw installed in the movable platform (11) at the side end of the third fixed frame (10); and the first support platform (12) is threadedly connected to a screw installed in the movable platform (11) at the top of the second fixed frame (9).

6. The multi-angle visual inspection device for engine blades according to claim 1, characterized in that: The movable adjustment component comprises a first oil tank (151) installed in the first support platform (12), a first piston rod (152) is limitedly slidable inside the first oil tank (151), the end of the first piston rod (152) is connected to the inner wall of the movable platform (11) installed at the top of the second fixed frame (9), a rotating plate (153) is rotatably connected to the top of the first support platform (12), a second oil tank (154) is installed at the top of the first support platform (12), a second piston rod (155) is limitedly slidable inside the second oil tank (154), a sliding groove is opened at the back end of the rotating plate (153), a sliding block is limitedly slidable in the sliding groove, the sliding block is rotatably connected to the end of the second piston rod (155), and a visual inspection head (14) is installed on the upper surface of the rotating plate (153).

7. The multi-angle visual inspection device for engine blades according to claim 6, characterized in that: The edge of the adjustment plate (181) is provided with a convex strip, a slide groove is provided inside the convex strip, the mounting rod (182) is limitedly slid in the slide groove on the surface of the convex strip, the number of the mounting rods (182) is six groups, and the six groups of the mounting rods (182) are distributed in a circular shape on the end surface of the sleeve cover (16), and the number of the dimming plates (186) is six groups, and the six groups of the dimming plates (186) are evenly distributed in a circular shape inside the sleeve ring (185).

8. The multi-angle visual inspection device for engine blades according to claim 7, characterized in that: A notch is provided inside the connecting platform (184); the back end of the dimming plate (186) is located inside the notch inside the connecting platform (184); and a mirror sticker is provided on the surface of the dimming plate (186).

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