A plastic product cylindrical surface defect detection mechanism

Abstract

The utility model discloses a kind of plastic product cylindrical surface defect detection mechanisms, including platform, line light source and gantry, the platform is equipped with the rotating device of horizontal arrangement, the driving end of the rotating device is equipped with clamping device, the clamping device is used to clamp columnar product and rotate along axis by rotating device, the line light source is located in the position opposite to clamping device, the platform is equipped with X-axis moving frame, the X-axis moving frame is equipped with Y-axis moving frame, the line light source is located on Y-axis moving frame, the X-axis moving frame and Y-axis moving frame respectively drive line light source to move along X-axis and Y-axis direction, the visual detection device is located in the position above columnar product. By line light source along the length direction of columnar product irradiation, and then make its irradiation surface can evenly cover in the predetermined position of columnar product, so that visual detection device can obtain clearer image data, and then improve the detection rate of detecting plastic product cylindrical surface defect.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment, and in particular to a defect detection mechanism for cylindrical surfaces of plastic products. Background Technology

[0002] Plastic injection molding is a method of producing plastic products by injecting molten plastic into a mold under pressure, which then cools and solidifies to obtain various desired plastic parts.

[0003] Due to production demands, simple flat surfaces cannot meet customized needs, resulting in a surge of injection-molded products with cylindrical surfaces.

[0004] The common method for testing the cylindrical surface of plastic products (which can be made of transparent or non-transparent materials) is as follows: 1. Use dome lights or ring lights for front lighting; 2. Then take pictures for inspection. However, because the top of the cylindrical surface of the plastic product is raised, the raised part will be overexposed and bright, the uniformity of the overall cylindrical surface image is very poor, and the edge capture will also be relatively blurry, which will make it difficult to detect defects in this cylindrical surface area.

[0005] This affects the accuracy of defect detection in cylindrical areas, and the detection is not comprehensive enough. In addition, the process is too long and prone to errors. Utility Model Content

[0006] The main purpose of this invention is to propose a defect detection mechanism for cylindrical surfaces of plastic products. It aims to simplify the detection process by combining a line light source with the object being tested. At the same time, the detection is simple and comprehensive, which can effectively improve the detection accuracy.

[0007] To achieve the above objectives, this utility model proposes a defect detection mechanism for cylindrical surfaces of plastic products, comprising: The platform is equipped with a horizontally arranged rotating device, and the driving end of the rotating device is equipped with a clamping device. The clamping device is used to clamp the columnar product and rotate it along the axis of the rotating device. A linear light source is provided, positioned opposite the clamping device. The platform is equipped with an X-axis moving frame, and the X-axis moving frame is also equipped with a Y-axis moving frame. The line light source is mounted on the Y-axis moving frame, and the X-axis moving frame and the Y-axis moving frame respectively drive the line light source to move along the X-axis and Y-axis directions; A gantry frame, wherein the gantry frame is equipped with a horizontal moving frame, and the horizontal moving frame is equipped with a visual inspection device, which is located above the columnar product.

[0008] In practical design, a linear light source illuminates the cylindrical product along its length, ensuring that the illuminated surface evenly covers the predetermined area of ​​the product. This allows the visual inspection device to acquire clearer image data, thereby improving inspection accuracy. Among them, the inspection of columnar products is generally of the outer peripheral surface. Therefore, the rotation device can drive the clamping device to rotate, which can realize the inspection of the outer peripheral surface in a single station, thus improving the inspection efficiency. In actual design, when the columnar product is made of transparent material, the line light source can be located at the lower side of the product and penetrate the product at a predetermined tilt angle, thereby realizing the development of defects on the outer periphery of the columnar product. Specifically, the test object is rotated 3 times by a rotating device, and 3 images are taken by a computer program-controlled vision inspection device. Then, the defects on the entire cylindrical surface can be detected by the inspection method, avoiding the material scratching phenomenon caused by repeated handling. Since the line light source penetrates directly through the object being tested and the light is straight, any defects will be clearly visible in the captured image. This creates a sharp contrast between the defects on the cylindrical surface of the object being tested and the entire cylindrical surface. Through traditional algorithms, defects on the entire cylindrical surface can be detected very well, making the detection method efficient and accurate. Of course, when the columnar product is made of non-transparent material, the line light source can be located on the upper side of the product and illuminate at a predetermined angle, which can effectively improve the light and shadow effect of the surface to be inspected, reduce external interference, and improve the inspection effect. Attached Figure Description

[0009] Figure 1 This is a three-dimensional schematic diagram of the present utility model. Figure 1 ; Figure 2 This is a three-dimensional schematic diagram of the present utility model. Figure 2 ; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is an image of the product from one angle.

[0010] In the picture, 1 is the platform, 10 is the rotating device, 11 is the through hole, and 12 is the positioning tube. 2 is a clamping device. 3 is a line light source, 31 is an X-axis moving frame, and 32 is a Y-axis moving frame. 4 is a gantry frame, 41 is a horizontal moving frame, and 42 is a vertical moving frame. 5 represents a vision inspection device, 50 represents a telecentric lens, and 51 represents an industrial camera. 100 is the product. Detailed Implementation

[0011] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0012] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0013] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0014] like Figures 1 to 3 As shown, a defect detection mechanism for cylindrical surfaces of plastic products includes: Platform 1, the platform 1 is provided with a horizontally arranged rotating device 10, the driving end of the rotating device 10 is provided with a clamping device 2, the clamping device 2 is used to clamp the columnar product and rotate it along the axis of the rotating device 10. A linear light source 3 is positioned opposite the clamping device 2. The platform 1 is equipped with an X-axis moving frame 31, and the X-axis moving frame 31 is equipped with a Y-axis moving frame 32. The line light source 3 is mounted on the Y-axis moving frame 32, and the X-axis moving frame 31 and the Y-axis moving frame 32 respectively drive the line light source 3 to move along the X-axis and Y-axis directions; The gantry frame 4 is equipped with a horizontal moving frame, and the horizontal moving frame is equipped with a visual inspection device 5, which is located above the columnar product.

[0015] In practical design, the linear light source 3 illuminates the cylindrical product along its length, ensuring that the irradiated surface evenly covers the predetermined position of the cylindrical product. This allows the visual inspection device 5 to acquire clearer image data, thereby improving the detection rate of cylindrical surface defects in plastic products. Among them, the inspection of columnar products is generally of the outer peripheral surface. Therefore, the rotating device 10 can drive the clamping device 2 to rotate so that the inspection of the outer peripheral surface can be realized in a single station, which improves the inspection efficiency. In actual design, when the columnar product is made of transparent material, the line light source 3 can be located at the lower side of the product and penetrate the product at a predetermined tilt angle, thereby realizing the development of defects on the outer periphery of the columnar product. Specifically, the test object is rotated 3 times by the rotating device 10, and the vision inspection device 5 is controlled by the computer program to take 3 pictures. Then, the defects on the entire cylindrical surface can be detected by the inspection method, avoiding the material scratching phenomenon caused by repeated handling. Since the line light source 3 directly penetrates the object being tested and the light is straight, any defects will be clearly displayed in the captured image, thus creating a sharp contrast between the defects on the cylindrical surface of the object being tested and the entire cylindrical surface. Through traditional algorithms, defects on the entire cylindrical surface can be detected very well, making the detection method efficient and accurate. Of course, when the columnar product is a non-transparent material, the line light source 3 can be located on the upper side of the product and illuminate at a predetermined angle, which can effectively improve the light and shadow effect of the surface to be inspected, reduce external interference, and improve the inspection effect.

[0016] Specifically, the gantry 4 is also equipped with a vertically movable frame 42. The vertical moving frame 42 includes a vertical guide rail mounted on the column of the gantry frame 4, a vertical slider slidably mounted on the vertical guide rail, and a vertical driving device for driving the vertical slider. The horizontal moving frame 41 is located between the two vertical sliders, thereby adjusting the height position between the visual inspection device 5 and the object being measured.

[0017] Specifically, the vertical drive device is a vertical lead screw pair or a vertical worm gear drive device, which can be set to electric control or manual control according to actual needs.

[0018] Specifically, the X-axis moving frame 31 and the Y-axis moving frame 32 are manual adjustment rod devices or linear motors. Depending on the actual needs, they can be set as manual adjustment devices as shown in the figure, or the two linear motors can be used in conjunction to achieve the position adjustment of the linear light source 3.

[0019] Specifically, the horizontal moving frame 41 includes a horizontal slider disposed on a horizontal guide rail, a horizontal slider slidably mounted on the horizontal guide rail, and a horizontal driving device for driving the horizontal slider. A crossbar is provided between the two vertical sliders, and the horizontal guide rail is provided on the crossbar, thereby realizing the adjustment of the relative position of the visual inspection device 5.

[0020] Specifically, the visual inspection device 5 includes a telecentric lens 50 and an industrial camera 51 disposed above the telecentric lens 50.

[0021] Specifically, the industrial camera 51 is an industrial monochrome camera or an industrial color camera.

[0022] Specifically, the linear light source 3 is tilted at an angle of 45 degrees, which can avoid interfering with the visual detection device 5 and also ensure uniform light coverage.

[0023] Specifically, the clamping device 2 is a suction cup or a suction nozzle, which enables the clamping and fixing of small products and drives them to rotate.

[0024] Specifically, the rotating device 10 has a through hole 11 in the middle, and a positioning tube 12 is provided at the front end of the through hole 11. The positioning tube 12 is connected to the driving end of the rotating device 10, and the front end of the positioning tube 12 is the clamping device 2. The through hole 11 is equipped with a sealing tube. The outer wall of the sealing tube is sealed to the inner wall of the through hole 11 by a sealing ring. The rear end of the sealing tube is connected to a negative pressure device.

[0025] The rotating device 10 can be a pneumatic rotary motor or a rotary servo motor. Through the cooperation of the positioning tube 12 and the sealing tube, a tube-free setting is achieved, which allows the product to rotate according to actual needs.

[0026] The columnar products can be rotated three, four, or five times, which can be adjusted or selected according to actual needs. Of course, they can also be rotated more times, such as 10 or 20 times.

[0027] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A defect detection mechanism for cylindrical surfaces of plastic products, characterized in that, include: The platform is equipped with a horizontally arranged rotating device, and the driving end of the rotating device is equipped with a clamping device. The clamping device is used to clamp the columnar product and rotate it along the axis of the rotating device. A linear light source is provided, positioned opposite the clamping device. The platform is equipped with an X-axis moving frame, and the X-axis moving frame is also equipped with a Y-axis moving frame. The line light source is mounted on the Y-axis moving frame, and the X-axis moving frame and the Y-axis moving frame respectively drive the line light source to move along the X-axis and Y-axis directions; A gantry frame, wherein the gantry frame is equipped with a horizontal moving frame, and the horizontal moving frame is equipped with a visual inspection device, which is located above the columnar product.

2. The defect detection mechanism for cylindrical surfaces of plastic products as described in claim 1, characterized in that: The gantry frame is also equipped with a vertically movable frame. The vertical moving frame includes a vertical guide rail mounted on the gantry column, a vertical slider slidably mounted on the vertical guide rail, and a vertical driving device for driving the vertical slider. The horizontal movement is positioned between two vertical sliders.

3. The plastic article cylindrical surface defect detecting mechanism according to claim 2, wherein: The vertical drive device is a vertical lead screw pair or a vertical worm gear drive device.

4. The defect detection mechanism for cylindrical surfaces of plastic products as described in claim 1, characterized in that: The X-axis and Y-axis moving frames are manually adjustable rod devices or linear motors.

5. The plastic article cylindrical surface defect detecting mechanism according to claim 1, wherein: The horizontal moving frame includes a horizontal slider mounted on a horizontal guide rail, a horizontal slider slidably mounted on the horizontal guide rail, and a horizontal driving device for driving the horizontal slider. A crossbar is provided between the two vertical sliders, and the horizontal guide rail is provided on the crossbar.

6. The plastic article cylindrical surface defect detecting mechanism according to claim 1, wherein: The visual inspection device includes a telecentric lens and an industrial camera positioned above the telecentric lens.

7. The cylindrical surface defect detection mechanism for plastic products as described in claim 6, characterized in that: The industrial camera is either an industrial monochrome camera or an industrial color camera.

8. The plastic article cylindrical surface defect detecting mechanism according to claim 1, wherein: The linear light source is tilted at an angle of 45 degrees.

9. The plastic article cylindrical surface defect detecting mechanism according to claim 1, wherein: The clamping device is a suction cup or a suction nozzle.

10. The defect detection mechanism for cylindrical surfaces of plastic products as described in claim 9, characterized in that: The rotating device has a through hole in the middle, and a positioning tube is provided at the front end of the through hole. The positioning tube is connected to the drive end of the rotating device, and the front end of the positioning tube is the clamping device. The through hole is equipped with a sealing tube. The outer wall of the sealing tube is sealed to the inner wall of the through hole by a sealing ring. The rear end of the sealing tube is connected to a negative pressure device.

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