Burr detecting and screening machine for special-shaped plastic parts

Abstract

The utility model discloses a burr detecting and screening machine for special-shaped plastic parts. The burr detecting and screening machine comprises a transmission unit, a visual detecting unit and a screening unit, on one hand, the posture of the special-shaped plastic part entering the visual detection area is changed based on multi-point contact, so that the visual angles of obtained pictures are relatively consistent, the accuracy of analysis and comparison is further improved, and meanwhile, the angle formed by the grid rod and the annular conveying belt is adjusted along with the displacement of the sliding seat; the movement posture correction of various special-shaped plastic parts is met, and the practicability is high; and on the other hand, on the basis of the layout that one NG material receiving assembly corresponds to the multiple OK material receiving assemblies, the output end of the conveying belt can directly receive the NG special-shaped plastic parts, sorting of qualified and unqualified products is facilitated, the sorting and conveying efficiency of the qualified products is improved under selection of the multiple OK material receiving assemblies, and concentrated material receiving and material blocking are avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of machining, specifically relates to a burr detection and screening machine for special-shaped plastic parts. BACKGROUND

[0002] The burr detection and screening machine is mainly used for burr detection of products, and a conventional burr detection and screening machine comprises a conveying unit, a visual detection unit and a sorting unit, wherein the visual detection unit is used to acquire the shape of the product and form an image comparison, and the sorting is performed based on the structure of the image comparison, and the sorting is specifically divided into an NG area and an OK area.

[0003] However, for special-shaped plastic parts, there are differences in position in transmission, and therefore the following technical defects exist in screening:

[0004] 1) The acquired image is difficult to compare due to different angles or positions, and comparison error rate occurs, which affects the accuracy of final screening and sorting;

[0005] 2) The formed sorting only has two areas (an NG area and an OK area), and once a transfer accident occurs, the special-shaped plastic parts will be stacked in the OK area, and the probability of OK area blockage is increased. INVENTION CONTENTS

[0006] The utility model aims at overcoming the defects of the prior art, and provides an improved burr detection and screening machine for special-shaped plastic parts.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following scheme:

[0008] A burr detection and screening machine for special-shaped plastic parts comprises:

[0009] A conveying unit comprises an annular conveying belt;

[0010] A visual detection unit has a visual detection area and comprises a visual camera and an image processor;

[0011] A screening unit comprises an NG material receiving assembly and an OK material receiving assembly;

[0012] In particular, a sliding seat that slides and adjusts along the length direction of the annular conveying belt is arranged on one side of the annular conveying belt, the burr detection and screening machine further comprises a rotating seat that is rotatably installed on the sliding seat in the vertical direction, and a leaning fence rod that is installed on the rotating seat and intersects the length direction of the annular conveying belt, wherein the leaning fence rod is located above the side of the annular conveying belt, and the special-shaped plastic parts enter the visual detection area at the same angle by keeping the same side multi-contact abutting against the leaning fence rod;

[0013] The OK material receiving assembly has a plurality of OK material receiving assemblies and is distributed side by side along the annular conveying belt and on the side edge of the annular conveying belt; and the NG material receiving assembly is connected to the output end of the annular conveying belt.

[0014] Preferably, the section of the leaning fence rod is circular. The more the contact is reduced, the more the profiled plastic part is adjusted in angle and transmitted forward. At the same time, the contact is two or three. Generally, two contacts are enough, so that two points can form a straight line, and then the position and posture adjustment can be implemented with the straight line as the reference, so as to obtain the image with a relatively constant posture.

[0015] According to one specific implementation and preferred aspect of the present application, the included angle between the leaning fence rod and the length direction of the ring-shaped transmission belt is less than 20°. Generally, the angle should not be too large, because too large angle will cause transmission obstruction, and at the same time, the ring-shaped transmission belt will occupy a larger space with the increase of the angle. And the angle is too small to correct the posture.

[0016] Preferably, a rack rod extending upward and downward is arranged in the visual inspection area, and the visual camera is movably mounted on the rack rod upward and downward. The focal length adjustment for image acquisition of different products is satisfied.

[0017] Further, a light shielding template is arranged on the rack rod, wherein the light shielding template is located below the visual camera, and a sight window is arranged on the light shielding template. The reflection formed when the image is acquired is avoided to cause that the acquired image cannot be prepared for comparison.

[0018] In some specific embodiments, the visual camera and the light shielding template are movably mounted on the rack rod upward and downward. The actual viewing distance, focal length and the like need to be adjusted.

[0019] According to another specific implementation and preferred aspect of the present application, the visual inspection unit further comprises a light supplementing light source located in the visual inspection area and at one side or opposite sides of the ring-shaped transmission belt. Based on the effect of light supplementing, the definition of image acquisition is increased, and then the accuracy of image comparison is improved.

[0020] According to another specific implementation and preferred aspect of the present application, each OK material collecting assembly comprises a material collecting bin and a horizontal pushing component located at opposite sides of the ring-shaped transmission belt, wherein the horizontal pushing component moves along the width direction of the ring-shaped transmission belt to push the profiled plastic part to the corresponding material collecting bin. The material collecting is implemented by using the horizontal pushing mode; and based on the plurality of OK material collecting assemblies, the material collecting pressure is relieved.

[0021] Preferably, the horizontal pushing component comprises a fixed seat fixed at one side of the ring-shaped transmission belt, a horizontal pushing module telescoped from the fixed seat, and a power device mounted on the fixed seat to drive the horizontal pushing module to push the material collecting bin from the ring-shaped transmission belt.

[0022] Preferably, the material collecting bin comprises a bin position and a material collecting frame transferred or loaded from the bin position.

[0023] Due to the use of the above technical and equipment scheme, the present application has the following advantages compared with the prior art:

[0024] Existing methods for detecting burrs on irregularly shaped plastic parts suffer from several drawbacks. Positional differences in transmission lead to difficulties in image comparison due to variations in angle or location, resulting in comparison errors that affect the accuracy of final sorting. Furthermore, the sorting process only creates two zones (NG and OK). Unexpected transfers can cause irregularly shaped plastic parts to pile up in the OK zone, increasing the probability of blockage. This application addresses these shortcomings by redesigning a burr detection and sorting machine for irregularly shaped plastic parts. The machine first adjusts the orientation of the irregularly shaped plastic parts by using the angle formed by the grid bars to create motion resistance, ensuring that the parts enter the visual inspection area at the same angle from multiple contact points on the same side. Then, a vision camera and image processor acquire and analyze the images. Finally, based on the analysis results, non-compliant (NG) irregularly shaped plastic parts are directly sorted. The parts are discharged from the conveyor end to the NG receiving assembly. At the same time, multiple OK receiving assemblies can collect multiple qualified (OK) irregularly shaped plastic parts simultaneously to complete the inspection of irregularly shaped plastic parts. Therefore, this utility model, on the one hand, uses multi-point contact to change the posture of irregularly shaped plastic parts entering the visual inspection area, so that the obtained photographic perspectives are relatively consistent, thereby improving the accuracy of analysis and comparison. At the same time, the angle formed by the grid bar and the ring conveyor belt, as well as the adjustment with the sliding seat, can meet the motion posture correction of various irregularly shaped plastic parts, which has high practicality. On the other hand, based on the layout of one NG receiving assembly corresponding to multiple OK receiving assemblies, and the output end of the conveyor belt can directly collect NG irregularly shaped plastic parts, it not only facilitates the sorting of qualified and unqualified products, but also improves the sorting and transmission efficiency of qualified products with the selection of multiple OK receiving assemblies, avoiding material concentration and blockage. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the burr detection and screening machine for irregularly shaped plastic parts in this embodiment;

[0026] Figure 2 for Figure 1 Front view diagram;

[0027] Figure 3 for Figure 2 A left-view diagram;

[0028] Figure 4 for Figure 2 A diagram showing the view from the right.

[0029] Figure 5 for Figure 2 A top-down view;

[0030] Among them: 1. Transmission unit; 10. Circular conveyor belt; 11. Transmission power unit; 12. Slide;

[0031] 2, visual detection unit; 20, frame rod; 21, visual camera; 22, light shielding template; 220, sight window; 23, light source;

[0032] 3, screening unit; 30, NG receiving assembly; 300, NG receiving bin; 31, OK receiving assembly; 310, receiving bin; 311, horizontal pushing component; a, bin position; b, fixed seat; c, horizontal pushing module; d, power device;

[0033] 4, rotating seat;

[0034] 5, fence rod;

[0035] M, special-shaped plastic part. DETAILED DESCRIPTION

[0036] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0038] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality of" means at least two, for example, two, three, etc., unless otherwise specifically limited.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0041] like Figures 1 to 5 As shown, the rough edge detection and screening machine for irregularly shaped plastic parts in this embodiment includes a transmission unit 1, a vision inspection unit 2, and a screening unit 3.

[0042] Specifically, the transmission unit 1 includes an annular transmission belt 10 and a transmission power unit 11. The annular transmission belt 10 is horizontally arranged and extends along the front-back direction. Under the drive of the transmission power unit 11, the annular transmission belt 10 drives the irregularly shaped plastic part M to be transported from back to front. The transmission power unit 11 uses a conventional motor and pulley transmission method to implement the displacement and transmission of the irregularly shaped plastic part M.

[0043] In some embodiments, the visual inspection unit 2 is located on a section of the transmission path of the endless transmission belt 10, and comprises a frame 20 arranged on the formed visual inspection area, a visual camera 21 and a light shielding template 22 respectively mounted on the frame 20, and an image processor, wherein the frame 20 extends upwards and downwards on one side of the endless transmission belt 10, and the visual camera 21 and the light shielding template 22 are both movably mounted on the frame 20. The focal length adjustment can meet the image acquisition of different products. The light shielding template 22 is located below the visual camera 21, and a sight window 220 is arranged on the light shielding template 22. This avoids the reflection formed during image acquisition, which causes the acquired image to be unable to be prepared for comparison.

[0044] In this example, the visual inspection unit 2 further comprises a supplementary light source 23 located in the visual inspection area and on opposite sides of the endless transmission belt 10. Based on the effect of the supplementary light, the clarity of image acquisition is increased, and the accuracy of image comparison is improved.

[0045] In some embodiments, a sliding seat 12 is further arranged on one side of the endless transmission belt 10 and slides along the length direction of the endless transmission belt 10, and the burr detection and screening machine further comprises a rotating seat 4 rotatably mounted on the sliding seat 12, and a leaning fence 5 mounted on the rotating seat 4 and intersecting the length direction of the endless transmission belt 10, wherein the leaning fence 5 is located above the side of the endless transmission belt 20, and the special-shaped plastic part M is kept to abut against the leaning fence 5 from the same side at the same angle to enter the visual inspection area.

[0046] In this example, the cross section of the leaning fence 5 is circular. The contact is reduced as much as possible, which is more conducive to the adjustment of the special-shaped plastic part at the same angle and the forward transmission. At the same time, the contact points are two or three. Generally, two contact points are enough, so two points can form a straight line, and then the position and posture adjustment can be implemented based on the straight line to obtain images with a relatively constant posture.

[0047] According to one specific implementation and preferred aspect of the present application, the included angle between the leaning fence 5 and the length direction of the endless transmission belt 10 is less than 20° (generally, the most suitable angle is 2-10°). Generally, the angle should not be too large, because too large angle will cause transmission obstruction, and at the same time, the road occupation rate of the endless transmission belt will increase with the increase of the angle. The angle is too small and cannot correct the posture.

[0048] The screening unit 3 comprises an NG material receiving assembly 30 and an OK material receiving assembly 31, wherein the NG material receiving assembly 30 comprises an NG material receiving bin 300 which is connected to the output end of the endless transmission belt 10; and the OK material receiving assembly 31 is a plurality of and is sequentially and spacedly distributed along the length of the endless transmission belt 10.

[0049] In some embodiments, each OK receiving assembly 31 comprises a receiving bin 310 and a horizontal pushing component 311 located on opposite sides of the endless conveying belt 10, wherein the horizontal pushing component 311 moves along the width direction of the endless conveying belt 10 to push the special-shaped plastic part M to the corresponding receiving bin 310. The receiving is implemented by using the horizontal pushing mode, and the receiving pressure is relieved based on multiple OK receiving assemblies. In this example, the receiving bin 310 comprises a bin position a and a receiving frame loaded or transferred from the bin position a. The horizontal pushing component 311 comprises a fixed seat b fixed on one side of the endless conveying belt 10, a horizontal pushing module c telescoped in the fixed seat b, and a power device d installed on the fixed seat b to drive the horizontal pushing module c to push the receiving bin 310 from the endless conveying belt 10.

[0050] In summary, after adopting the selvedge detection and screening machine, firstly, the posture of the profiled plastic part is adjusted based on the angle formed by the abutting bar to form a movement obstacle, so that the profiled plastic part keeps the same angle to enter the vision detection area from the same side and multiple contacts abutting against the abutting bar; then, image acquisition and comparative analysis are performed based on the vision camera and the image processor; finally, unqualified (NG) profiled plastic parts are directly discharged from the conveying end to the NG material collecting assembly based on the analysis result, and meanwhile, multiple qualified (OK) profiled plastic parts can be collected based on multiple OK material collecting assemblies, so as to complete the detection of the profiled plastic part. Therefore, on the one hand, the posture of the profiled plastic part entering the vision detection area is changed based on multiple point contacts, so that the acquired photo perspective is relatively consistent, and the accuracy of analysis and comparison is improved, and meanwhile, the angle formed by the abutting bar and the annular transmission belt is adjusted with the displacement of the sliding seat, so as to meet the movement posture correction of various profiled plastic parts, and the utility is high. On the other hand, the layout of one NG material collecting assembly corresponding to multiple OK material collecting assemblies is adopted, and the output end of the transmission belt can directly collect the NG profiled plastic part, so that the sorting of qualified and unqualified products is facilitated, and the sorting and transmission efficiency of qualified products is improved under the selection of multiple OK material collecting assemblies, so as to avoid the problems of concentrated collection and blockage. On the third hand, the cross section of the abutting bar is circular, so that the contact is reduced as much as possible, and the profiled plastic part is adjusted and transmitted forward at the same angle, and meanwhile, the two or three contacts are generally enough, so that two points can form a straight line, and then the position and posture adjustment is implemented based on the straight line, so as to acquire images with relatively constant posture. On the fourth hand, the included angle between the abutting bar and the length direction of the annular transmission belt is less than 20°, and the angle is generally not too large, because too large angle will cause transmission obstacle, and meanwhile, the lane occupation rate of the annular transmission belt increases with the increase of the angle. If the angle is too small, the posture correction effect cannot be achieved. On the fifth hand, the frame rod extending upward and downward is arranged in the vision detection area, and the vision camera is movably arranged on the frame rod, so as to meet the focal length adjustment of image acquisition of different products; meanwhile, the light shielding template is arranged below the vision camera, and the sight window is arranged on the light shielding template, so as to avoid the reflection caused by the acquired image from affecting the comparison of the acquired image. In addition, the image acquisition clarity is improved based on the light supplement, and the image comparison accuracy is improved. On the sixth hand, the horizontal pushing mode is adopted to implement the collection, and meanwhile, the multiple OK material collecting assemblies are adopted to relieve the collection pressure.

[0051] The above examples are only used to illustrate the technical concept and characteristics of the utility model, and the purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit and essence of the utility model shall be covered within the protection scope of the utility model.

Claims

1. A burr detection and screening machine for irregular plastic parts, comprising: a conveying unit comprising a looped conveying belt; a visual detection unit having a visual detection area and comprising a visual camera and an image processor; a screening unit comprising an NG receiving assembly and an OK receiving assembly; characterized in that a slide is further provided on one side of the looped conveying belt and is adjustable along the length direction of the looped conveying belt, the burr detection and screening machine further comprises a rotating seat rotatably mounted on the slide in the vertical direction, and a leaning fence rod mounted on the rotating seat and intersecting the length direction of the looped conveying belt, wherein the leaning fence rod is located above the side of the looped conveying belt, and the irregular plastic parts enter the visual detection area from the same side and keep the same angle by multiple contacts on the same side against the leaning fence rod; the OK receiving assembly is multiple and distributed side by side along the looped conveying belt on the side of the looped conveying belt, and the NG receiving assembly is connected with the output end of the looped conveying belt.

2. The machine for detecting and sorting burrs of profiled plastic parts according to claim 1, characterized in that: The cross section of the leaning fence rod is circular; and / or, the contacts are two or three.

3. The machine for detecting and sorting burrs of profiled plastic parts according to claim 1, characterized in that: The included angle between the leaning fence rod and the length direction of the looped conveying belt is less than 20°.

4. The machine for detecting and sorting burrs of profiled plastic parts according to claim 1, characterized in that: A rack rod extending upward and downward is provided in the visual detection area, and the visual camera is movably mounted on the rack rod upward and downward.

5. The machine for detecting and sorting burrs of profiled plastic parts according to claim 4, characterized in that: A light shielding template is further provided on the rack rod, wherein the light shielding template is located below the visual camera, and a view window is provided on the light shielding template.

6. The machine for detecting and sorting burrs of profiled plastic parts according to claim 5, characterized in that: The visual camera and the light shielding template are movably mounted on the rack rod upward and downward.

7. The machine for detecting and sorting burrs of profiled plastic parts according to claim 1, characterized in that: The visual detection unit further comprises a light supplementing light source located in the visual detection area and on one side or opposite sides of the looped conveying belt.

8. The machine for detecting and sorting burrs of profiled plastic parts according to claim 1, characterized in that: Each OK receiving assembly comprises a receiving bin located on opposite sides of the looped conveying belt and a horizontal pushing component, wherein the horizontal pushing component moves along the width direction of the looped conveying belt to push the irregular plastic parts to the corresponding receiving bin.

9. The machine for detecting and sorting burrs of profiled plastic parts according to claim 8, characterized in that: The horizontal pushing component comprises a fixed seat fixed on one side of the looped conveying belt, a horizontal pushing module retractable from the fixed seat, and a power device mounted on the fixed seat to drive the horizontal pushing module to push the receiving bin on the looped conveying belt.

10. The machine for detecting and sorting burrs of profiled plastic parts according to claim 8, characterized in that: The receiving bin comprises a bin position and a receiving frame transferred or loaded from the bin position.

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