Multi-angle visual inspection equipment for engine blades

Abstract

The invention discloses multi-angle visual inspection equipment for engine blades, and relates to the technical field of visual inspection. Comprising a supporting frame, a connecting rod is installed at the top end of the left side of the supporting frame, a bottom plate is installed in the supporting frame through an electric cylinder, a housing is installed at the top end of the bottom plate, a fixing ring is installed at the bottom of the inner wall of the housing, first fixing frames are installed at the front end and the right end of the supporting frame, and a second fixing frame is installed at the rear end of the supporting frame; a third fixing frame is installed at the end of the connecting rod, and moving tables are installed at the top end of the second fixing frame and the side end of the third fixing frame. According to the invention, the three-color light source is arranged in the light source cover, light of different colors can be irradiated to the surface of an object at different angles, reflection angles formed in different areas are different, and light of different color components can be reflected back to the visual detection head, so that the shot surface of the object forms a contrast with bright colors; and the three-dimensional characteristics of the object are highlighted.

Description

Technical Field

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

[0002] Engine blades, especially aircraft engine blades, are key components of aircraft engines. They have been in service for a long time under harsh working conditions such as high temperature, high pressure, high-speed rotation, and high-frequency vibration. As the core components of aircraft engines, the manufacturing accuracy and surface quality of engine blades directly affect the performance and safety of the engine. Its quality directly affects the performance and life of aircraft engines, and even affects flight safety. Therefore, it is very important to accurately and comprehensively detect engine blades. When using image processing to detect surface defects of metal parts, the first problem is to clearly image the surface of the parts. In the field of computer vision, light sources are usually used to illuminate the parts, and then the surface images of the parts are acquired through cameras. Therefore, the hardware selection of the imaging system is particularly critical.

[0003] First, in view of the needs of metal parts inspection, if traditional point light sources or surface light sources are used to illuminate the parts during the image acquisition process, due to the smooth surface of the metal parts, some areas will produce strong reflections, resulting in light spots in the image. Polarizers are usually used to weaken the reflections, but the light spots cannot be completely eliminated. Secondly, part surface defect detection usually requires 100% coverage of the product surface, but metal parts usually have complex spatial structures, and using fixed-position cameras to take pictures cannot cover all surface information of metal parts. When inspecting workpieces of different sizes, the existing equipment is not convenient to adjust the position of the visual inspection head according to the size of the workpiece. If the distance between the inspection head and the blade is too far, the image may be blurred due to the smaller imaging ratio. If the distance is too close, it may not be conducive to the complete shooting of the blade, and it is easy to make some areas out of focus. Although the wrapped diffuse reflection light source can ensure that the illumination of each position of the part to be inspected is consistent, the change in the position of the inspection head may cause the light angle of some parts of the blade to change. 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 the details to be lost; if the inspection head is far away from the light source, the illumination may be insufficient, making the image dark and affecting defect recognition.

[0004] In response to the above problems, it is urgent to carry out innovative design based on the original basis. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-angle visual inspection device for engine blades, so as to solve the problem that the above-mentioned background technology proposes to use traditional point light sources or surface light sources to illuminate parts, some areas will produce strong reflections, and the existing equipment is not convenient to adjust the position of the visual inspection head according to the size of the workpiece, but the change of the position of the inspection head may cause the light receiving angle of certain parts of the blade to change. The technical solution of the present invention is aimed at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-angle visual inspection device for engine blades, comprising a support frame, a connecting rod is installed at the top left side of the support frame, a bottom plate is installed inside the support frame through an electric cylinder, a cover is installed at the top of the bottom plate, a fixing ring is installed at the bottom of the inner wall of the cover, 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 supporting platform is slidably provided on the moving platform at the top of the first fixing frame and the side end of the third fixing frame, a first supporting platform is slidably provided in the moving platform at the top of the second fixing frame, a visual inspection head is installed at the top of the second supporting platform, a moving adjustment component is provided at the top of the first supporting platform, a cover is provided at the end of the visual inspection head for limiting sliding, and an electric push rod is installed at the side end of the visual inspection head; The light source adjustment mechanism comprises an adjustment plate installed at the end of the visual inspection head, a mounting rod is installed on the surface of the end of the visual inspection head, and also comprises a connecting platform and a collar installed inside the cover, and a dimming plate is rotatably connected inside the collar.

[0007] Preferably, an electric cylinder is installed on one side of the connecting rod close to the bottom plate and above the cover shell, and a light source cover is installed on the protruding end of the electric cylinder.

[0008] Preferably, the cover shell is hemispherical in design, and observation ports parallel to the base plate are provided on the front end and right end surfaces of the cover shell, an observation port at a 45° angle to the base plate is provided on the rear end of the cover shell, and an observation port perpendicular to the cover shell is provided on the top end of the cover shell.

[0009] Preferably, mounting frames are installed on the top surface and the rear end surface of the cover shell, and cover plates are rotatably connected inside the mounting frames, and the number of the cover plates is four groups.

[0010] Preferably, a screw rod is installed inside the movable platform through a motor, the second supporting platform is threadedly connected to the screw rod installed in the movable platform at the top end of the first fixed frame and the side end of the third fixed frame, and the first supporting platform is threadedly connected to the screw rod installed in the movable platform at the top end of the second fixed frame.

[0011] Preferably, the movable adjustment component includes a first oil tank installed in the first supporting platform, a first piston rod is limitedly sliding inside the first oil tank, the end of the first piston rod is connected to the inner wall of the movable platform installed on the top end of the second fixed frame, a rotating plate is rotatably connected to the top of the first supporting platform, a second oil tank is installed on the top of the first supporting platform, a second piston rod is limitedly sliding in the second oil tank, a sliding groove is opened at the back end of the rotating plate, a sliding block is limitedly sliding in the sliding groove, the sliding block is rotatably connected to the end of the second piston rod, and a visual inspection head is installed on the upper surface of the rotating plate.

[0012] Preferably, a limit strip is installed on the surface of the end of the visual inspection head for limiting the sliding of the mounting rod, the cover slides limitedly at the end of the visual inspection head, the extended end of the electric push rod is connected to the back end of the cover, the adjustment plate is connected to the lens of the visual inspection head through a thin rod, an interference ring is installed in the middle of the inner wall of the cover, the ring is located inside the cover away from the end of the visual inspection head, and a connecting platform is installed at one end of the mounting rod.

[0013] Preferably, a convex strip is installed on the edge of the adjustment plate, a sliding groove is opened inside the convex strip, and the mounting rod slides in the sliding groove on the surface of the convex strip. The number of the interference rings is two groups, and the adjustment plate is located in the gap between the two groups of interference rings. The number of the mounting rods is six groups, and the six groups of mounting rods are distributed in a circular shape on the end surface of the cover. The number of the dimming plates is six groups, and the six groups of dimming plates are evenly distributed in a circular shape inside the ring.

[0014] Preferably, a notch is provided inside the connecting platform, the back end of the dimming board is located inside the notch inside the connecting platform, and a mirror sticker is provided on the surface of the dimming board.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention, through the three-color light source arranged in the light source cover, can use light of different colors to illuminate the surface of the object at different angles. The reflection angles formed in different areas are different, and the light of different color components will be reflected back to the visual detection head, so that the surface of the photographed object forms a sharp color contrast, highlighting the three-dimensional features of the object. A wrapped diffuse reflection light source is arranged inside the shell, and the part detection position is arranged in the central area inside the light source to ensure the consistency of lighting at various positions of the parts to be inspected, which can effectively solve the problem of strong reflection. The scheme designs a multi-angle synchronous imaging scheme to take pictures of the parts, which is divided into vertical direction photography, horizontal dual-camera photography, and 45-degree angle photography. It can effectively solve the problem of complex part structure, which not only ensures the integrity of the part surface coverage, but also achieves the consistency of the image acquisition of each camera.

[0016] 2. The present invention, through the provision of a movable adjustment component, can adjust the position of the visual inspection head according to the size of the workpiece, and can ensure that the visual inspection head is always aligned with the observation port on the cover surface during the movement. The position of the visual inspection head can be flexibly adjusted according to workpieces of different sizes, so that the detection system can adapt to the detection of more types of workpieces, thereby improving the flexibility of the equipment. The relative position of the visual inspection head and the observation port on the cover surface remains constant, ensuring the consistency and stability of the field of view during the detection process.

[0017] 3. The present invention, through the light source adjustment mechanism, when the visual detection head is far away from the light source, as the distance increases, the light will gradually weaken during the propagation process, resulting in a decrease in the light intensity received by the visual detection head. The anti-arc surface at the end of the visual detection head can increase the contact area between the light and the end of the detection head, thereby improving the reflection efficiency of the light. When the light is irradiated on the anti-arc surface, due to the special shape of the arc surface, the light will be more widely reflected and scattered, so that more light can enter the visual detection head, compensating for the weakening of the light intensity caused by the increase in distance. When the visual detection head is close to the light source, when the visual detection head is close to the diffuse reflection light source, the light may be too strong, resulting in overexposure of the photographed photo. The arc surface design at the end of the visual 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 irradiated on the camera lens, thereby avoiding overexposure of the photo. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the main structure of the present invention from one perspective; Figure 2 A schematic diagram of the main structure of the present invention from another perspective; Figure 3 It is a schematic diagram of the partial structure of the cover shell of the present invention; Figure 4 It is a schematic diagram of the explosion structure of the cover of the present invention; Figure 5 It is a structural schematic diagram of the support frame and the connecting rod of the present invention; Figure 6 It is a schematic diagram of the structure of the first fixing frame and the second fixing frame of the present invention; Figure 7 is a partial structural schematic diagram of the second fixing frame of the present invention; Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure at A in the middle; Fig. 9 It is a schematic diagram of the main structure of the visual inspection head of the present invention; Fig.10 It is a schematic diagram of the local structure of the visual inspection head of the present invention; Fig.11 For the present invention Fig.10 A schematic diagram of the enlarged structure at B in the middle; Fig.12 It is a schematic diagram of the exploded structure of the visual inspection head of the present invention.

[0019] 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 platform; 12. first supporting platform; 13. second supporting platform; 14. visual inspection head; 151. first oil tank; 152. first piston rod; 153. rotating plate; 154. second oil tank; 155. second piston rod; 16. cover; 17. electric push rod; 181. adjusting plate; 182. mounting rod; 183. resistance ring; 184. connecting platform; 185. sleeve ring; 186. dimming plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 12 The present invention provides a technical solution: a multi-angle visual inspection device for engine blades, comprising a support frame 1, 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 through an electric cylinder, a cover shell 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 shell 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 supporting platform 13 is slid 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 supporting platform 12 is slid in the moving platform 11 at the top of the second fixing frame 9, a visual inspection head 14 is installed at the top of the second supporting platform 13, a moving adjustment component is arranged at the top of the first supporting platform 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; The light source adjustment mechanism includes an adjustment plate 181 installed at the end of the visual inspection head 14, a mounting rod 182 is installed on the surface of the end of the visual inspection head 14, and also includes a connecting platform 184 and a ring 185 installed inside the cover 16, and a dimming plate 186 is rotatably connected inside the ring 185. The light source adjustment component can not only avoid the problem that when the visual inspection head 14 is far away from the light source, the light will gradually weaken during the propagation process as the distance increases, but also when the visual inspection head 14 is close to the light source, when the visual inspection head 14 is close to the diffuse reflection light source, the light may be too strong.

[0022] As an embodiment of the present invention, an electric cylinder is installed on one side of the connecting rod 2 close to the bottom plate 3 and above the cover 4, and a light source cover is installed on the protruding end of the electric cylinder, and a three-color tower-shaped light source is installed in 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 lighting. The three-color light source uses different colors of light to illuminate the surface of the object at different angles. Different reflection angles are formed in different areas, and light of different color components will be reflected back to the visual detection head 14, so that the surface of the photographed object forms a sharp color contrast, highlighting the three-dimensional characteristics of the object; As an embodiment of the present invention, the cover shell 4 is hemispherical in design, and observation ports parallel to the base plate 3 are provided on the front end and right end surfaces of the cover shell 4, which are located on a spherical surface 25 mm away from the bottom. The front end and right end of the cover shell 4 are at a 90° angle to the base plate 3, and the rear end of the cover shell 4 is provided with an observation port at a 45° angle to the base plate 3. The top of the cover shell 4 is provided with an observation port perpendicular to the cover shell 4. The cover shell 4 is hemispherical as a whole, with a bottom circular radius of 123 mm, and is coated with highly reflective material inside. A diffuse reflection light source LED lamp bead is installed inside the fixing ring 7, which irradiates directly upward. The interior of the hemispherical structure of the light source is coated with highly reflective material. After multiple reflections on the inner wall of the light source, the light forms uniform diffuse reflection light, forming an integrating sphere light source. After the part enters the light source, the four visual inspection heads 14 take a group (4 photos), and after the part rotates 180° along the z-axis, the visual inspection head 14 takes another group (4 photos). These 8 photos can completely cover the outer surface of the part. In order to reduce the problem of unclear imaging of the edge of parts due to light diffraction during photography, light-absorbing materials are placed on the opposite side of the camera in the integrating sphere light source, and the parts are photographed using a multi-angle synchronous imaging solution, including vertical photography, horizontal dual-camera photography, and 45-degree angle photography, which not only ensures the integrity of the surface coverage of the parts, but also achieves consistency in the imaging of each camera; As an embodiment of the present invention, a mounting frame 5 is installed 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. The number of the cover plates 6 is four groups, and the four groups of visual inspection heads 14 open their corresponding light source cover plates 6 in sequence when taking pictures; As an embodiment of the present invention, a screw is installed inside the moving platform 11 through a motor, the second support platform 13 is threadedly connected with the screw installed in the moving platform 11 at the top end of the first fixed frame 8 and the side end of the third fixed frame 10, and the first support platform 12 is threadedly connected with the screw installed in the moving platform 11 at the top end of the second fixed frame 9, and the position of the visual inspection head 14 can be adjusted according to the size of the workpiece by rotating the screw; As an embodiment of the present invention, the movable adjustment component includes a first oil tank 151 installed in the first support platform 12, a first piston rod 152 is limitedly slid 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 slid in the second oil tank 154, a slide groove is opened at the back end of the rotating plate 153, a slider is limitedly slid in the slide groove, the slider 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. Through the movable adjustment component set, the position of the visual inspection head 14 can be adjusted according to the size of the workpiece, and it can be ensured that the visual inspection head 14 is always aligned with the observation port on the surface of the cover shell 4 during the movement. The position of the visual inspection head 14 can be flexibly adjusted according to workpieces of different sizes, so that the detection system can adapt to more types of workpiece detection, thereby improving the flexibility of the equipment. As an embodiment of the present invention, a limit strip is installed on the surface of the end of the visual inspection head 14 for limiting the sliding of the mounting rod 182, the cover 16 is limited and slides at the end of the visual inspection head 14, the extended end of the electric push rod 17 is connected to the back end of the cover 16, the adjustment plate 181 is connected to the lens of the visual inspection head 14 through a thin rod, a resistance ring 183 is installed in the middle of the inner wall of the cover 16, the ring 185 is located inside the cover 16 away from the end of the visual inspection head 14, a connecting platform 184 is installed at one end of the mounting rod 182, the adjustment plate 181 and the thin rod are both made of transparent acrylic material, and the electric push rod 17 pushes the cover 16 to slide to adjust the curvature of the adjustment plate 181; When using traditional point light sources or surface light sources to illuminate parts, some areas will produce strong reflections. The existing equipment is not convenient to adjust the position of the visual inspection head 14 according to the size of the workpiece, but the change of the position of the inspection head may cause the light angle of certain parts of the blade to change. The specific implementation method is as follows. During inspection, first, the light source cover is pushed by the electric cylinder at the side end of the connecting rod 2 and moved to the top of the workpiece. The surface of the workpiece is illuminated by the three-color light source in the light source cover, and the visual inspection head 14 inspects the workpiece. Then, the light source cover is retracted by the electric cylinder, and the electric cylinder inside the support frame 1 pushes the cover shell 4 to move to the upper end of the workpiece until the visual inspection head 14 coincides with the inspection hole. The diffusely reflected light inside the cover shell 4 illuminates the surface of the workpiece, and the visual inspection head 14 inspects the workpiece. When inspecting smaller workpieces, the internal screw of the moving table 11 is controlled by the motor to rotate clockwise, and the internal screws of the first fixed frame 8 and the third fixed frame 10 rotate clockwise to control the second support table 13 to drive the visual inspection The head 14 moves toward the cover shell 4, and the internal screw rod of the second fixed frame 9 rotates to control the moving platform 11 to move toward the cover shell 4. The moving platform 11 moves and pulls the first piston rod 152, and the internal oil of the first oil tank 151 is injected into the second oil tank 154. The internal oil of the second oil tank 154 pushes the second piston rod 155 to extend, and the slider at the end of the second piston rod 155 slides in the slide groove at the back end of the rotating plate 153 to adjust the angle of the visual inspection head 14 on the surface of the rotating plate 153. While the motor drives the screw rod to rotate, the extended end of the electric push rod 17 pulls the cover 16 to move away from the cover shell 4. The internal contact ring 183 of the cover 16 presses the edge of the adjustment plate 181 to form an arc surface. The light diverges when passing through the arc surface. When the cover 16 moves away from the cover shell 4, the end of the mounting rod 182 The connecting platform 184 contacts the back end of the dimming plate 186, so that the dimming plate 186 rotates inside the ring 185 toward the adjustment plate 181. 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. 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. Working principle: During inspection, first, the light source cover is pushed by the electric cylinder at the side end of the connecting rod 2 to move to the top of the workpiece, and the surface of the workpiece is irradiated with the three-color light source in the light source cover. The visual inspection head 14 inspects the workpiece, and then the light source cover is retracted by the electric cylinder. The electric cylinder inside the support frame 1 pushes the cover shell 4 to move to the upper end of the workpiece until the visual inspection head 14 coincides with the inspection hole, and the diffuse reflected light inside the cover shell 4 irradiates the surface of the workpiece, and the visual inspection head 14 inspects the workpiece. When inspecting smaller workpieces, the internal screw rod of the moving platform 11 is controlled by the motor to rotate clockwise, and the internal screw rods of the first fixed frame 8 and the third fixed frame 10 rotate clockwise to control the second support platform 13 to drive the visual inspection head 14 to move toward the cover shell 4, and the internal screw rod of the second fixed frame 9 rotates to control the moving platform 11 to move toward the cover shell 4. 11 moves and 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, and the slider at the end of the second piston rod 155 slides in the slide groove at the back end of the rotating plate 153 to adjust the angle of the visual inspection head 14 on the surface of the rotating plate 153. While the motor drives the screw rod to rotate, the extended end of the electric push rod 17 pulls the cover 16 to move away from the cover shell 4. The inner contact ring 183 of the cover 16 presses against the edge of the adjustment plate 181 to form an arc surface. The light diverges when passing through the arc surface. When the cover 16 moves away from the cover shell 4, the connecting platform 184 at the end of the mounting rod 182 contacts the back end of the dimming plate 186, so that the dimming plate 186 rotates inside the ring 185 toward the adjustment plate 181. 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. While the motor drives the screw 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 the edge of the adjustment plate 181 to form a reverse 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 The connecting platform 184 contacts the back end of the dimming plate 186, causing the dimming plate 186 to rotate inside the ring 185 away from the adjustment plate 181, and then the cover plate 6 is opened in the mounting frame 5 in turn by the motor, so that the four groups of visual inspection heads 14 can inspect the surface of the workpiece in turn.

[0023] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. In the description of the present invention, unless otherwise specified, "multiple" means two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood 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 "connected" 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 ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in 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).

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 end of the first fixed frame (8) and 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 end 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 1, characterized in that: A limit strip is installed on the end surface of the visual inspection head (14) for limiting the sliding movement of the mounting rod (182); the cover (16) is limitedly slidable at the end of the visual inspection head (14); the extended end of the electric push rod (17) is connected to the back end of the cover (16); the adjustment plate (181) is connected to the lens of the visual inspection head (14) via a thin rod; a resistance ring (183) is installed in the middle of the inner wall of the cover (16); the ring (185) is located at one end of the cover (16) away from the visual inspection head (14); and a connecting platform (184) is installed at one end of the mounting rod (182).

8. The multi-angle visual inspection device for engine blades according to claim 7, 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 installation rod (182) is limitedly slid in the slide groove on the surface of the convex strip, the number of the abutment rings (183) is two groups, the adjustment plate (181) is located in the gap between the two groups of abutment rings (183), the number of the installation rods (182) is six groups, the six groups of the installation rods (182) are distributed in a circular shape on the end surface of the cover (16), and the number of the dimming plates (186) is six groups, the six groups of the dimming plates (186) are evenly distributed in a circular shape inside the ring (185).

9. The multi-angle visual inspection device for engine blades according to claim 8, 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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