A piston surface micro-defect identification machine

Abstract

The present invention relates to the technical field of piston detection, and particularly to a visual recognition machine for microscopic defects on the surface of a piston, including a table body. One end of the connecting block is fixedly installed with a machine body. Two eyepieces are fixedly installed on the upper surface of the machine body. An installation block is provided at the bottom of the connecting column. An installation disk is rotatably installed at the bottom of the installation block. Multiple objective lenses are fixedly installed on the lower surface of the installation disk. A display screen is provided on the upper surface of the table body. The display screen is used to display the images read by the objective lenses. A CCD vision system is provided inside the display screen. The CCD vision system is used to capture images of the images in the display screen. The images of the piston surface are directly read through the eyepieces and the objective lenses, and the read images are displayed on the display screen. Then, the CCD vision system takes pictures of the images in the display screen for image analysis to determine whether it is qualified. Compared with traditional cameras, the objective lenses have a larger magnification factor, so that the microscopic inspection of the piston surface can be carried out, improving the accuracy of visual inspection of the piston.

Description

Technical Field

[0001] This invention relates to the field of piston inspection technology, and in particular to a piston surface micro-defect identification machine. Background Technology

[0002] Pistons are one of the main moving parts of a diesel engine and are a component of the combustion chamber. During the piston production process, due to the complexity of handling and processing, the piston surface is easily damaged to varying degrees. The main forms of damage include wear, scoring, cracks and fractures of the outer cylindrical surface and ring grooves, and top ablation. Therefore, it is necessary to inspect the finished pistons. Usually, quality inspectors take pictures of the pistons with a camera, then transmit the pictures to a display screen, and then use a CCD vision system to take pictures of the images on the display screen and perform image analysis to determine whether the piston is qualified.

[0003] The existing cameras have limited magnification, resulting in some tiny parts being unclear in the piston photos taken by the cameras, making it impossible to examine the piston at a microscopic level, and thus compromising the accuracy of visual inspection of the piston. Summary of the Invention

[0004] The purpose of this invention is to address the following shortcomings in the prior art: the magnification of existing cameras is limited, resulting in some small parts being unclear in the piston photos taken by the camera, making it impossible to perform microscopic inspection of the piston, and thus the accuracy of visual inspection of the piston cannot be guaranteed. Therefore, this invention proposes a piston surface microscopic defect identification machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A piston surface micro-defect identification machine includes a stage, a base on the upper surface of the stage, a threaded rod rotatably mounted on the upper surface of the base, a slider threaded onto the threaded rod, the slider being restricted from rotation by a limiting component, a connecting block fixedly mounted on the surface of the slider, an organ fixedly mounted at one end of the connecting block, two eyepieces fixedly mounted on the upper surface of the organ, a connecting column fixedly mounted on the lower surface of the organ, a mounting block at the bottom of the connecting column, a mounting plate rotatably mounted at the bottom of the mounting block, and multiple objective lenses fixedly mounted on the lower surface of the mounting plate;

[0007] The stage body is equipped with a display screen on its upper surface, which is used to display images read by the objective lens. The stage body surface is also equipped with a CCD vision system, which is used to take pictures of the images displayed on the display screen.

[0008] Preferably, the limiting component includes two limiting rods that are vertically fixedly installed on the upper surface of the platform, and the slider is slidably sleeved on the two limiting rods.

[0009] Preferably, L-shaped mounting plates are fixedly installed on both the left and right side walls of the base. A first spring rod is fixedly installed on the surface of the mounting plate. A fixing block is fixedly installed at one end of the first spring rod. A second spring rod is fixedly installed on the surface of the fixing block. A clamping plate is fixedly installed at one end of the second spring rod. Both first spring rods are stretched by a pressing assembly.

[0010] Preferably, the pressing assembly includes two L-shaped connecting rods respectively fixedly installed on the left and right side walls of the slider and two first pressing rods respectively fixedly installed on the surfaces of the two connecting rods. The longitudinal section of the fixing block is trapezoidal, and the lower surfaces of the two first pressing rods are respectively arranged face-to-face with the inclined surfaces of the two fixing blocks.

[0011] Preferably, a first protective frame is symmetrically and horizontally slidably arranged on the upper surface of the body, and a second protective frame is symmetrically and horizontally slidably arranged on the bottom of the mounting block. The two first protective frames are respectively fixedly connected to the two second protective frames by U-shaped fixing rods, and connected to the connecting column by connecting components.

[0012] Preferably, the connecting component includes two symmetrically fixed support rods mounted on the surface of the connecting column and two telescopic springs respectively sleeved on the two support rods. The surface of the fixed rod has a through hole, and the two support rods are slidably installed in the two through holes respectively. Each of the two ends that are far apart from each other is fixedly installed with a mounting block. The two ends of the telescopic springs are fixedly connected to the fixed rod and the mounting block respectively.

[0013] Preferably, an inclined plate is fixedly installed on the surface of the fixed rod, a U-shaped fixed plate is fixedly installed on the upper surface of the platform, and second pressing rods are symmetrically fixedly installed on the surface of the fixed plate, with the upper surfaces of the two second pressing rods abutting against the lower surfaces of the two inclined plates respectively.

[0014] Preferably, the lower surface of the fixing block is provided with a spherical groove, and a sphere is rolled and embedded in the spherical groove, and the sphere rolls and contacts the platform.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The image of the piston surface is directly read through the eyepiece and objective lens and displayed on the screen. Then, the image on the screen is photographed by the CCD vision system and the image is analyzed to determine whether it is qualified. Compared with the traditional camera, the objective lens has a greater magnification, which can perform microscopic inspection of the piston surface and improve the accuracy of visual inspection of the piston.

[0017] 2. First, place the piston to be tested on the base and between the two clamping plates. Then, control the slider and objective lens to move down by rotating the threaded rod. Under the action of the pressing component, the two first spring rods will be stretched, so that both pressing plates will abut against the piston, clamp it, and push it to the correct testing position. This prevents the piston from shifting position during the testing process. When the objective lens moves up, the clamping of the piston will be automatically released, making it easy to pick up. At the same time, the observation height of multiple objective lenses can be adjusted, which improves practicality.

[0018] 3. When the device is not in use, the slider will be at the top, so that the two first protective frames and the two second protective frames will cover the two eyepieces and multiple objective lenses respectively. This can protect the eyepieces and objective lenses and prevent dust from falling on them. When the device is in use, when the slider moves down, under the action of the inclined plate and the second pressing rod, the two first protective frames and the two second protective frames will move away from each other in the horizontal direction, thereby exposing the eyepieces and objective lenses for use by the staff. Attached Figure Description

[0019] Figure 1 This is a frontal three-dimensional structural diagram of a piston surface micro-defect identification machine proposed in this invention;

[0020] Figure 2 This is a front view of the base structure in a piston surface micro-defect detector proposed in this invention;

[0021] Figure 3 This is a partial three-dimensional structural diagram of the base in a piston surface micro-defect detector proposed in this invention;

[0022] Figure 4 This is a partial three-dimensional structural diagram of the body of a piston surface micro-defect detector proposed in this invention;

[0023] Figure 5 This is a three-dimensional structural diagram of a fixed block in a piston surface micro-defect detector proposed in this invention;

[0024] Figure 6 for Figure 1 Enlarged structural diagram at point A in the middle;

[0025] Figure 7 for Figure 2 Enlarged structural diagram at point B;

[0026] Figure 8 for Figure 3 Enlarged structural diagram at point C;

[0027] Figure 9 for Figure 3Enlarged structural diagram at point D.

[0028] In the diagram: 1. Body, 2. Base, 3. Threaded rod, 4. Slider, 5. Connecting block, 6. Body, 7. Eyepiece, 8. Connecting column, 9. Mounting block, 10. Mounting plate, 11. Objective lens, 12. Display screen, 13. Limiting rod, 14. Mounting plate, 15. First spring rod, 16. Fixing block, 17. Second spring rod, 18. Clamping plate, 19. Connecting rod, 20. First pressing rod, 21. First protective frame, 22. Second protective frame, 23. Fixing rod, 24. Support rod, 25. Telescopic spring, 26. Placement block, 27. Inclined plate, 28. Fixing plate, 29. Second pressing rod, 30. Sphere. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Reference Figures 1-9 A piston surface micro-defect identification machine includes a stage 1, a base 2 on the upper surface of the stage 1, a threaded rod 3 vertically rotatably mounted on the upper surface of the base 2, a slider 4 threadedly sleeved on the threaded rod 3, the slider 4 being restricted from rotation by a limiting component, the limiting component including two limiting rods 13 vertically fixedly mounted on the upper surface of the stage 1, the slider 4 being slidably sleeved on the two limiting rods 13, a connecting block 5 fixedly mounted on the surface of the slider 4, an organ 6 fixedly mounted at one end of the connecting block 5, two eyepieces 7 fixedly mounted on the upper surface of the organ 6, a connecting column 8 fixedly mounted on the lower surface of the organ 6, a mounting block 9 at the bottom of the connecting column 8, a mounting plate 10 rotatably mounted at the bottom of the mounting block 9, and multiple objective lenses 11 fixedly mounted on the lower surface of the mounting plate 10;

[0031] The upper surface of the stage 1 is provided with a display screen 12, which is used to display the image read by the objective lens 11. The surface of the stage 1 is provided with a CCD vision system (the CCD vision system is existing technology and will not be described in detail here), which is used to take pictures of the image on the display screen 12.

[0032] First, place the piston to be inspected on the base 2. Then, by rotating the threaded rod 3, the slider 4, which is threaded onto the threaded rod 3, will move vertically under the constraint of the two limiting rods 13. Control the slider 4 to move the machine body 6 downward. Select a suitable objective lens 11 to align with the piston, and then read the image of the piston surface through the eyepiece 7. The read image is then displayed on the display screen 12. The vision system then takes a picture of the image on the display screen 12, performs image analysis, and determines whether it is qualified. Compared with traditional cameras, the objective lens 11 has a higher magnification, which allows for microscopic inspection of the piston surface and improves the accuracy of visual inspection of the piston.

[0033] L-shaped mounting plates 14 are fixedly installed on both the left and right side walls of the base 2. A first spring rod 15 is fixedly installed on the surface of the mounting plate 14. A fixing block 16 is fixedly installed at one end of the first spring rod 15. A second spring rod 17 is fixedly installed on the surface of the fixing block 16. A clamping plate 18 is fixedly installed at one end of the second spring rod 17. Both first spring rods 15 are stretched by a pressing assembly. The pressing assembly includes two L-shaped connecting rods 19 fixedly installed on the left and right side walls of the slider 4 and two first pressing rods 20 fixedly installed on the surfaces of the two connecting rods 19. The longitudinal section of the fixing block 16 is trapezoidal. The lower surfaces of the two first pressing rods 20 are respectively set face-to-face with the inclined surfaces of the two fixing blocks 16.

[0034] First, place the piston to be tested on the base 2 and between the two clamping plates 18. Then, control the slider 4 and the machine body 6 to move down by rotating the threaded rod 3. During the downward movement, the two first pressing rods 20 will slide into contact with the inclined surfaces of the two fixed blocks 16 respectively. Then, under the action of the inclined surfaces, the two first spring rods 15 will be stretched, so that the two clamping plates 18 will also move towards the piston. When both clamping plates 18 are in contact with the piston, the piston can be simply clamped and positioned to avoid the piston from shifting position during the test. At the same time, the clamping plates 18 can also push the piston to the correct test position during the movement.

[0035] Then, when the test is completed, the screw rod 3 is rotated to control the slider 4 and the machine body 6 to move upward. At this time, the pressure force exerted by the two first pressing rods 20 on the two fixed blocks 16 disappears. The two fixed blocks 16 will then move and reset quickly under the elastic potential energy of the two first spring rods 15. The clamping plates 18 will automatically release the piston, making it convenient for the staff to take it out.

[0036] A first protective frame 21 is symmetrically and horizontally slidably arranged on the upper surface of the body 6, and a second protective frame 22 is symmetrically and horizontally slidably arranged on the bottom of the mounting block 9. The two first protective frames 21 are respectively fixedly connected to the two second protective frames 22 by U-shaped fixing rods 23, and connected to the connecting column 8 by connecting components. The connecting components include two support rods 24 symmetrically and fixedly installed on the surface of the connecting column 8 and two telescopic springs 25 respectively sleeved on the two support rods 24. The surface of the fixing rod 23 has a through hole, and the two support rods 24 are slidably installed in the two through holes respectively, and the ends of the two rods that are far apart from each other are fixedly installed with a mounting block 26. The two ends of the telescopic spring 25 are respectively fixedly connected to the fixing rod 23 and the mounting block 26.

[0037] An inclined plate 27 is fixedly installed on the surface of the fixed rod 23, and a U-shaped fixed plate 28 is fixedly installed on the upper surface of the platform 1. Second pressing rods 29 are symmetrically fixedly installed on the surface of the fixed plate 28, and the upper surfaces of the two second pressing rods 29 abut against the lower surfaces of the two inclined plates 27 respectively.

[0038] In the initial state, that is, when no testing is being performed, the slider 4 and the body 6 will be at the top. At this time, the two first protective frames 21 and the two second protective frames 22 will cover the eyepiece 7 and the objective lens 11 respectively, which can protect the eyepiece 7 and the objective lens 11, prevent them from being exposed to the outside and easily damaged, and also prevent dust from falling on them. There is no need to wipe the surface of the eyepiece 7 and the objective lens 11 before the testing is performed.

[0039] When testing is required, the slider 4 and the machine body 6 are moved down by rotating the threaded rod 3. At this time, the two second pressing rods 29 will slide into contact with the inclined surfaces of the two inclined plates 27 respectively. Then, under the action of the inclined surfaces, the two fixed rods 23 will move away from each other in the horizontal direction along with the two first protective frames 21 and the two second protective frames 22. The two fixed rods 23 will slide on the two support rods 24 respectively, and the telescopic spring 25 will gradually contract, exposing the eyepiece 7 and the objective lens 11 for use by the staff.

[0040] Then, when the test is completed, as the slider 4 and the body 6 move upward, the pressure exerted by the two second pressing rods 29 on the two inclined plates 27 will gradually decrease. Then, the two fixed rods 23, the two first protective frames 21 and the two second protective frames 22 will move and reset rapidly under the elastic potential energy of the two telescopic springs 25, thereby covering the eyepiece 7 and the objective lens 11 again and protecting them.

[0041] The lower surface of the fixing block 16 is provided with a spherical groove, and a ball 30 is rolled and embedded in the spherical groove. The ball 30 rolls and contacts the platform 1. The ball 30 can support the fixing block 16 and reduce the friction between the contact surface of the fixing block 16 and the platform 1.

[0042] In this invention, the piston to be inspected is first placed on the base 2. Then, by rotating the threaded rod 3, the slider 4, which is threaded onto the threaded rod 3, moves vertically under the constraint of the two limiting rods 13. The slider 4 moves the machine body 6 downward. A suitable objective lens 11 is selected and aligned with the piston. Then, the image of the piston surface is read through the eyepiece 7 and displayed on the display screen 12. The image on the display screen 12 is then photographed by the CCD vision system, and image analysis is performed to determine whether it is qualified. Compared with traditional cameras, the objective lens 11 has a higher magnification, which allows for microscopic inspection of the piston surface and improves the accuracy of visual inspection of the piston.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A piston surface micro-defect identification machine, comprising a platform (1), characterized in that, The upper surface of the platform (1) is provided with a base (2), and a threaded rod (3) is vertically rotatably installed on the upper surface of the base (2). A slider (4) is threaded onto the threaded rod (3). The slider (4) is restricted from rotation by a limiting component. A connecting block (5) is fixedly installed on the surface of the slider (4). An organic body (6) is fixedly installed at one end of the connecting block (5). Two eyepieces (7) are fixedly installed on the upper surface of the organic body (6). A connecting column (8) is fixedly installed on the lower surface of the organic body (6). A mounting block (9) is provided at the bottom of the connecting column (8). A mounting plate (10) is rotatably installed at the bottom of the mounting block (9). Multiple objective lenses (11) are fixedly installed on the lower surface of the mounting plate (10). The upper surface of the stage (1) is provided with a display screen (12), which is used to display the image read by the objective lens (11). The surface of the stage (1) is provided with a CCD vision system, which is used to take pictures of the image in the display screen (12). The upper surface of the body (6) is symmetrically and horizontally slidably equipped with a first protective frame (21), and the bottom of the mounting block (9) is symmetrically and horizontally slidably equipped with a second protective frame (22). The two first protective frames (21) are respectively fixedly connected to the two second protective frames (22) by U-shaped fixing rods (23), and connected to the connecting column (8) by connecting parts. The connecting component includes two symmetrically fixed support rods (24) fixedly installed on the surface of the connecting column (8) and two telescopic springs (25) respectively sleeved on the two support rods (24). The surface of the fixed rod (23) is provided with a through hole. The two support rods (24) are slidably installed in the two through holes respectively, and the ends of the two rods that are far apart from each other are fixedly installed with a mounting block (26). The two ends of the telescopic spring (25) are fixedly connected to the fixed rod (23) and the mounting block (26) respectively. An inclined plate (27) is fixedly installed on the surface of the fixed rod (23), and a U-shaped fixed plate (28) is fixedly installed on the upper surface of the platform (1). A second pressing rod (29) is symmetrically fixedly installed on the surface of the fixed plate (28), and the upper surfaces of the two second pressing rods (29) abut against the lower surfaces of the two inclined plates (27) respectively.

2. The piston surface micro-defect identification machine according to claim 1, characterized in that, The limiting component includes two limiting rods (13) that are vertically fixed on the upper surface of the platform (1), and the slider (4) is slidably sleeved on the two limiting rods (13).

3. The piston surface micro-defect identification machine according to claim 1, characterized in that, The base (2) has L-shaped mounting plates (14) fixedly installed on both the left and right side walls. A first spring rod (15) is fixedly installed on the surface of the mounting plate (14). A fixing block (16) is fixedly installed at one end of the first spring rod (15). A second spring rod (17) is fixedly installed on the surface of the fixing block (16). A clamping plate (18) is fixedly installed at one end of the second spring rod (17). Both first spring rods (15) are stretched by a pressing assembly.

4. A piston surface micro-defect identification machine according to claim 3, characterized in that, The pressing assembly includes two L-shaped connecting rods (19) fixedly installed on the left and right side walls of the slider (4) and two first pressing rods (20) fixedly installed on the surfaces of the two connecting rods (19). The longitudinal section of the fixed block (16) is trapezoidal, and the lower surfaces of the two first pressing rods (20) are respectively arranged face-to-face with the inclined surfaces of the two fixed blocks (16).

5. A piston surface micro-defect identification machine according to claim 3, characterized in that, The lower surface of the fixing block (16) is provided with a spherical groove, and a ball (30) is rolled and embedded in the spherical groove. The ball (30) rolls and contacts the platform (1).

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