Workpiece surface defect detection equipment and detection method thereof

Abstract

The invention discloses workpiece surface defect detection equipment and a detection method thereof, and relates to the technical field of workpiece detection.The workpiece surface defect detection equipment comprises a conveying module used for sequentially conveying to-be-detected workpiece bodies to the direction of a detection end; the detection end is provided with two groups of lifting plates, the two groups of lifting plates are symmetrically arranged on two sides of the conveyor belt, and the lifting plates are connected with a first lifting module for driving the lifting plates to lift; a positioning frame body is fixedly arranged at the detection end, a longitudinal moving mechanism is fixedly arranged on the positioning frame body, a driving end of the longitudinal moving mechanism is fixed with a transverse moving mechanism, a rotating motor is fixedly arranged at a driving end of the transverse moving mechanism, and a driving end of the rotating motor is fixed with a side edge detection camera; a detection module is further arranged in the positioning frame and used for detecting the surfaces of the two sides of the workpiece body. Through integrated arrangement, all-directional detection of the workpiece body can be achieved at a time, the detection efficiency is improved, and the stability is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece detection, and particularly relates to a workpiece surface defect detection device and a detection method thereof. Background Art

[0002] A liquid crystal panel is a core component based on liquid crystal display technology. It provides light source through a backlight module, controls the arrangement of liquid crystal molecules by thin film transistors (TFTs) to adjust the light transmittance, and combines with color filters to achieve color image display. It has advantages such as low cost, mature technology, and long lifespan, and is widely used in fields such as televisions, monitors, and mobile phones.

[0003] The production process of liquid crystal panels is complex, involving multiple processes such as coating, etching, and developing, and is prone to point defects (such as black dots, bright dots), line defects (such as scratches, cracks), and Mura defects (cloudy spots, dirt), etc. These defects not only affect the product appearance, but may also cause problems such as circuit short - circuits and light leakage, reducing the display effect and the lifespan of the device. Through defect detection, defective products can be removed in a timely manner, reducing the flow of defective products into the market.

[0004] Currently, machine vision detection technology is usually adopted to detect the surface defects of liquid crystal panels. For example, a line - array camera, a lens, and a backlight / high - brightness line light source can be used to perform high - precision scanning on the panel surface, obtain clear images, and perform analysis.

[0005] In the prior art, as disclosed in the application document with the publication number CN118655077A, a non - destructive detection device for liquid crystal displays is also disclosed. It is provided with a display screen flipping mechanism, which can effectively improve the flipping efficiency of the liquid crystal display screen body, is not easy to cause damage to the liquid crystal display screen body during the flipping process, and can perform double - sided non - destructive detection on the liquid crystal display screen body; in the actual application process, the current detection mechanism can only achieve the detection of defects on the upper and lower surfaces of the liquid crystal panel. When there are defects on the four - week side edges of the liquid crystal panel, it will also affect its processing quality. However, the existing detection mechanism usually needs to set a locking device to position the liquid crystal display screen body, which leads to the inability to effectively detect its side edges, and a side - edge detection process needs to be set for detection, which is rather cumbersome. Summary of the Invention

[0006] The purpose of the present invention is to provide a workpiece surface defect detection device and a detection method thereof, and solve the following technical problems: Due to the need to set a positioning mechanism to position the workpiece, the current detection mechanism cannot synchronously detect its side edges.

[0007] The purpose of the present invention can be achieved through the following technical solutions: A workpiece surface defect detection device, including a conveying module for sequentially conveying a workpiece body to be detected in the direction of the detection end; Two lifting plates are arranged at the detection end, and the two lifting plates are symmetrically arranged on both sides of the conveyor belt. The lifting plates are connected to a first lifting module that drives their lifting; A positioning frame is also fixedly arranged at the detection end. A longitudinal moving mechanism is fixedly arranged on the positioning frame. The driving end of the longitudinal moving mechanism is fixed to a transverse moving mechanism. The driving end of the transverse moving mechanism is fixedly provided with a rotating motor, and the driving end of the rotating motor is fixed to a side edge detection camera; Among them, a detection module is also arranged in the positioning frame, and the detection module is used to detect the two side surfaces of the workpiece body.

[0008] Preferably, a clamping module for clamping and fixing the workpiece body is also arranged in the positioning frame. The clamping module is connected to the driving end of a second lifting module fixedly arranged on the positioning frame; Among them, a flipping module is also arranged in the positioning frame to drive the clamped workpiece body to rotate 90 degrees. The detection module includes a detection box body fixed on the positioning frame. Surface detection cameras are symmetrically arranged in the detection box body. A through groove for embedding the workpiece body is opened on the box wall of the detection box body.

[0009] Preferably, the conveying module further includes baffles symmetrically arranged on both sides of the conveyor belt.

[0010] Preferably, the clamping module includes a U-shaped frame fixed to the driving end of the second lifting module. Limiting frames are symmetrically and fixedly arranged at both ends of the U-shaped frame. A first sleeve is rotatably arranged on the limiting frame. Clamping rods are slidably inserted and arranged on the sides of the two first sleeves close to each other. A telescopic spring fixed to the clamping rod is fixedly arranged in the first sleeve. The end of the clamping rod away from the first sleeve is fixed to a clamping seat. A first inclined surface is opened on the bottom surface of the sides of the two clamping seats close to each other.

[0011] Preferably, convex plates are fixedly arranged at the two side baffles of the detection end. A reserved groove is opened on the side of the two convex plates close to each other. A partition board is embedded in the reserved groove. Two through holes are opened at the bottom of the reserved groove. A lifting rod is slidably embedded in the through holes. The lifting rod is connected to a third lifting module that drives its lifting.

[0012] Preferably, the first lifting module includes first screws symmetrically arranged on both sides of the detection end. A first gear is fixedly arranged at the end of the first screw. First nuts are symmetrically and helically sleeved on the first screw. A first push rod is rotatably arranged on the first nut. The other end of the first push rod is rotatably connected to the lifting plate; Wherein, both ends of the U-shaped frame are symmetrically and fixedly provided with lifting frames respectively. The bottom ends of the lifting frames are fixedly provided with driving plates, and on one side of the two driving plates close to each other, there are fixedly arranged first racks for meshing with the first gear.

[0013] Preferably, the third lifting module includes second screws symmetrically arranged on both sides of the detection end. The ends of the second screws are fixedly provided with second gears. Second nuts are symmetrically and spirally sleeved on the second screws. Second push rods are rotatably arranged on the second nuts, and the other ends of the second push rods are rotatably connected to the bearing plate. Wherein, the two lifting rods on both sides are fixed on the bearing plate, and on the other side of the driving plate, there is fixedly arranged a second rack for meshing with the second gear.

[0014] Preferably, the flipping module includes a third gear fixed on the first sleeve. Wherein, driving frames are respectively fixedly arranged on both sides of the detection box body, and a third rack for meshing with the third gear is fixedly arranged at the bottom of the driving frame.

[0015] Preferably, a horizontal air cylinder is further fixedly arranged on one side of the detection end. The horizontal air cylinder is fixed on the two side baffles. On the side of the driving end of the horizontal air cylinder close to the detection end, a push plate is fixedly arranged. Guide wheels are rotatably arranged on both sides of the push plate through brackets, and a receiving plate is fixedly arranged on the side of the detection end away from the horizontal air cylinder. Wherein, wedge-shaped seats are correspondingly fixedly arranged on the clamping seats. The distance between the two wedge-shaped seats is smaller than the distance between the two clamping seats. A second inclined surface corresponding to the guide wheel is arranged on the side of the wedge-shaped seat close to the horizontal air cylinder.

[0016] A detection method for a workpiece surface defect detection device, which is applied to the above-mentioned workpiece surface defect detection device, includes the following steps: The loading manipulator arranges several groups of workpiece bodies in sequence on the conveyor belt and conveys them to the detection end through the conveyor belt. The first lifting module drives the workpiece body to rise to the position of the side edge detection camera. The longitudinal moving mechanism, the transverse moving mechanism and the rotating motor cooperate to drive the side edge detection camera to move around the periphery of the workpiece body. The side edge detection camera obtains the side edge picture of the workpiece body to detect the side edge of the workpiece body. After the detection of the side edge is completed, the detection module performs a re-detection on the upper and lower surfaces of the workpiece body.

[0017] The beneficial effects of the present invention: (1)When the present invention detects the side edge of the workpiece body, the first lifting module drives the workpiece body to rise to the position of the side edge detection camera. At this time, there is no occlusion at the side edge of the workpiece body. Furthermore, the longitudinal movement mechanism, the transverse movement mechanism and the rotary motor cooperate to drive the side edge detection camera to move around the periphery of the workpiece body, and the side edge detection camera obtains the side edge picture of the workpiece body to achieve the effect of detecting the side edge of the workpiece body; (2)After the detection of the side edge of the workpiece body of the present invention is completed, the detection module performs re-detection on the upper and lower surfaces of the workpiece body, thereby realizing the full detection of the surface of the workpiece body. Compared with the prior art in which the side edge and the surface of the workpiece body are detected by independent processes respectively, the present invention can achieve the omnidirectional detection of the workpiece body at one time through an integrated setting, which not only improves the detection efficiency but also has higher stability; (3)In the present invention, as the lifting plate drives the workpiece body to separate from the conveyor belt, the second lifting module drives the U-shaped frame to descend, and the U-shaped frame synchronously drives the limiting frame and the clamping seat to descend. During the descending process, the first inclined surface of the clamping seat contacts the side edge of the workpiece body. As the clamping seat continues to descend, based on the limiting effect of the first inclined surface, the two clamping seats can be driven to move away from each other until the vertical surfaces where the two clamping seats approach each other contact the workpiece body. At this time, the telescopic spring is in a contracted state and generates elastic force, thereby realizing the effect of clamping the workpiece body. As the second lifting module drives the clamping seat to rise, the workpiece body can be synchronously driven to rise. The present invention realizes the effect of automatically clamping the workpiece body without using other servo drive devices to drive the clamping seat for clamping, and has higher automation and stability; (4)In the initial state of the present invention, the partition plate is in a state of being embedded in the reserved groove. When the workpiece body rises to separate from the conveyor belt, the third lifting module can drive the lifting rod to rise, and the lifting rod can synchronously drive the partition plate to rise to both sides of the workpiece body. Therefore, as the clamping seat descends, the first inclined surface of the clamping seat contacts the partition plate, and the partition plate clamps the workpiece body to avoid the phenomenon that the first inclined surface directly contacts the workpiece body and causes damage to its side edge. Description of the Drawings

[0018] The following further describes the present invention with reference to the drawings.

[0019] Figure 1 is a schematic structural diagram of a workpiece surface defect detection device of the present invention; Figure 2 is a schematic structural diagram of a positioning frame body in a workpiece surface defect detection device of the present invention; Figure 3 is a schematic structural diagram of a horizontal air cylinder in a workpiece surface defect detection device of the present invention; Figure 4It is a schematic structural diagram of a longitudinal movement mechanism in a workpiece surface defect detection device of the present invention; Figure 5 It is a schematic structural diagram of a reserved groove in a workpiece surface defect detection device of the present invention; Figure 6 It is a schematic structural diagram of a detection box body in a workpiece surface defect detection device of the present invention; Figure 7 It is a schematic structural diagram of a clamping seat in a workpiece surface defect detection device of the present invention; Figure 8 It is a schematic structural diagram of a screw rod in a workpiece surface defect detection device of the present invention; Figure 9 It is a schematic structural diagram of a lifting plate in a workpiece surface defect detection device of the present invention; Figure 10 It is a schematic structural diagram of the initial state of a workpiece body in a workpiece surface defect detection device of the present invention; Figure 11 It is a schematic structural diagram of the lifting plate when it rises in a workpiece surface defect detection device of the present invention; Figure 12 It is a schematic structural diagram of the partition plate when it rises in a workpiece surface defect detection device of the present invention.

[0020] In the figure: 1, conveying module; 2, workpiece body; 3, horizontal cylinder; 4, detection module; 5, side edge detection camera; 6, clamping module; 7, first lifting module; 8, flip module; 9, lifting plate; 101, positioning frame; 102, second lifting module; 103, baffle; 104, partition; 105, push plate; 106, conveyor belt; 107, convex plate; 108, reserved groove; 109, through hole; 110, receiving plate; 301, guide wheel; 401, detection box; 402, through groove; 403, surface detection camera; 501, longitudinal moving mechanism; 502, lateral moving mechanism; 503, rotating motor; 601, clamping seat; 602, first inclined surface; 603, U-shaped frame; 604, lifting frame; 605, driving plate; 606, conveyor belt; 607, convex plate; 608, reserved groove; 609, through hole; 610, receiving plate; 611, guide wheel; 612, detection box; 613, through groove; 614, surface detection camera; 615, longitudinal moving mechanism; 616, lateral moving mechanism; 617, rotating motor; 618, clamping seat; 619, first inclined surface; 620, U-shaped frame; 621, lifting frame; 622, driving plate; 623, U-shaped frame; 624, lifting frame; 625, driving plate; 630, U-shaped frame; 631, U-shaped frame; 632, U-shaped frame; 633, U-shaped frame; 634, U-shaped frame; 635, U-shaped frame; 636, U-shaped frame; 637, U-shaped frame; 638, U- 06, first rack; 607, second rack; 608, wedge-shaped seat; 609, second inclined surface; 610, limit frame; 611, clamping rod; 612, first bar holder; 613, first sleeve; 614, third gear; 615, second sleeve; 616, telescopic rod; 617, second bar holder; 618, screw rod; 619, L-shaped support plate; 701, third lifting module; 801, drive frame; 802, third rack; 901, lifting rod; 902, first push rod; 903, first screw rod; 904, first nut; 905, first gear; 906, L-shaped bracket; 907, second screw rod; 908, second nut; 909, second gear; 910, second push rod; 911, bearing plate; 912, limit rod. DETAILED DESCRIPTION

[0021] The technical scheme of the present invention will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1 See also Figures 1-4 As shown, the present invention is a workpiece surface defect detection device, comprising a conveying module 1, which is used to sequentially convey the workpiece body 2 to be detected toward the detection end; specifically, the conveying module 1 of this embodiment comprises a conveyor belt 106, both ends of the conveyor belt 106 are sleeved on conveyor rollers, and the conveyor rollers are driven by a servo motor to drive the conveyor belt 106 to transmit synchronously; In actual application, several groups of workpiece bodies 2 are arranged in sequence on the conveyor belt 106 by a loading robot. As the conveyor belt 106 rotates, the workpiece body 2 can be transported toward the detection end. The workpiece body 2 of this embodiment is a liquid crystal panel. It should be noted that the width of the conveyor belt 106 is smaller than the width of the workpiece body 2.

[0023] Please refer to Figure 9 , two sets of lifting plates 9 are arranged at the detection end. The two sets of lifting plates 9 are symmetrically arranged on both sides of the conveyor belt 106. The lifting plates 9 are connected to the first lifting module 7 that drives their lifting. Specifically, when the workpiece body 2 is conveyed to the detection end, both sides of the workpiece body 2 are just located on the two sets of lifting plates 9 (please refer to Figure 10 ). At this time, the conveyor belt 106 is adjusted to stop driving, and the first lifting module 7 drives the workpiece body 2 to rise through the lifting plates 9 until it is separated from the conveyor belt 106 (please refer to Figure 11 ); A positioning frame 101 is also fixedly arranged at the detection end. A longitudinal moving mechanism 501 is fixedly arranged on the positioning frame 101. The driving end of the longitudinal moving mechanism 501 is fixed to the transverse moving mechanism 502. The driving end of the transverse moving mechanism 502 is fixedly provided with a rotating motor 503. The driving end of the rotating motor 503 is fixed to the side edge detection camera 5. It can be explained that when detecting the side edge of the workpiece body 2 in this embodiment, the first lifting module 7 drives the workpiece body 2 to rise to the position of the side edge detection camera 5. At this time, there is no obstruction at the side edge of the workpiece body 2. Then, the longitudinal moving mechanism 501, the transverse moving mechanism 502 and the rotating motor 503 cooperate to drive the side edge detection camera 5 to move around the periphery of the workpiece body 2, and the side edge detection camera 5 obtains the side edge image of the workpiece body 2 to achieve the effect of detecting the side edge of the workpiece body 2.

[0024] Among them, a detection module 4 is also arranged in the positioning frame 101. The detection module 4 is used to detect the two side surfaces of the workpiece body 2; It can be explained that after the side edge of the workpiece body 2 is detected, the upper and lower surfaces of the workpiece body 2 are detected again by the detection module 4, so as to realize the full detection of the surface of the workpiece body 2. Compared with the prior art in which the side edge and the surface of the workpiece body 2 are detected by independent processes respectively, in this embodiment, through the integrated setting, the omnidirectional detection of the workpiece body 2 can be realized at one time, which not only improves the detection efficiency, but also has higher stability.

[0025] It should be noted that the first lifting module 7, the longitudinal moving mechanism 501 and the transverse moving mechanism 502 in this embodiment can adopt a synchronous belt transmission mechanism.

[0026] Embodiment 2 On the basis of Embodiment 1, please refer to Figures 2-4 and Figures 6-7 , a clamping module 6 for clamping and fixing the workpiece body 2 is also arranged in the positioning frame 101. The clamping module 6 is connected to the driving end of the second lifting module 102 fixedly arranged on the positioning frame 101; Among them, a flipping module 8 is also arranged in the positioning frame 101 for driving the workpiece body 2 after clamping to rotate 90 degrees. The detection module 4 includes a detection box body 401 fixed on the positioning frame 101. Surface detection cameras 403 are symmetrically arranged in the detection box body 401. A through groove 402 for embedding the workpiece body 2 is opened on the box wall of the detection box body 401. It can be explained that after the workpiece body 2 in this embodiment is detected along the side edge, the clamping module 6 is driven by the second lifting module 102 to descend to the position of the workpiece body 2. The clamping module 6 can clamp and fix the workpiece body 2. After fixing, the workpiece body 2 can be driven to rise by the second lifting module 102. During the rising process, the flipping module 8 drives the workpiece body 2 to rotate 90 degrees. As the second lifting module 102 drives the clamping module 6 to continue rising, the workpiece body 2 can be embedded in the through groove 402, and the images on both sides of the workpiece body 2 are obtained by the surface detection cameras 403, thereby realizing the detection of the surface of the workpiece body 2. After the detection is completed, each component can be reset.

[0027] In addition, the second lifting module 102 in this embodiment can adopt a synchronous belt transmission mechanism.

[0028] In this embodiment, please refer to Figures 1-3 and Figure 5 , the conveying module 1 further includes baffles 103 symmetrically arranged on both sides of the conveyor belt 106; specifically, by setting the baffles 103, the workpiece body 2 during the conveying process can be limited to avoid the phenomenon of skewing during the conveying of the workpiece body 2, and the conveying stability is further improved.

[0029] Please refer to Figure 2 and Figure 7 , the clamping module 6 includes a U-shaped frame 603 fixed at the driving end of the second lifting module 102. Limiting frames 610 are symmetrically fixed at both ends of the U-shaped frame 603. A first sleeve 613 is rotatably arranged on the limiting frames 610. Clamping rods 611 are slidably inserted on the sides of the two first sleeves 613 close to each other. A telescopic spring fixed to the clamping rod 611 is fixedly arranged in the first sleeve 613. One end of the clamping rod 611 away from the first sleeve 613 is fixed to the clamping seat 601. A first inclined surface 602 is opened on the bottom surface of the sides of the two clamping seats 601 close to each other; it can be explained that in the initial state, please refer to Figure 10, as the lifting plate 9 drives the workpiece body 2 to separate from the conveyor belt 106, the second lifting module 102 drives the U-shaped frame 603 to descend. The U-shaped frame 603 synchronously drives the limit frame 610 and the clamping seat 601 to descend. During the descending process, the first inclined surface 602 of the clamping seat 601 contacts the side edge of the workpiece body 2. As the clamping seat 601 continues to descend, based on the limiting effect of the first inclined surface 602, the two clamping seats 601 can be driven to move away from each other until the vertical surfaces where the two clamping seats 601 are close to each other contact the workpiece body 2. At this time, the telescopic spring is in a contracted state and generates elastic force, thereby realizing the effect of clamping the workpiece body 2. As the second lifting module 102 drives the clamping seat 601 to rise, the workpiece body 2 can be synchronously driven to rise. In this embodiment, the effect of automatically clamping the workpiece body 2 can be achieved, and there is no need to use other servo drive devices to drive the clamping seat 601 for clamping, with higher automation and stability.

[0030] When the first inclined surface 602 of the clamping seat 601 contacts the liquid crystal panel, in order to avoid damaging the side edge of the liquid crystal panel, as a further solution of this embodiment, please refer to Figures 1-2 , Figure 5 and Figure 8 , convex plates 107 are fixedly arranged at both side baffles 103 of the detection end. Reserved grooves 108 are opened on the side of the two convex plates 107 close to each other. A partition plate 104 is embedded in the reserved groove 108. Two groups of through holes 109 are opened at the bottom of the reserved groove 108. Lifting rods 901 are slidably embedded in the through holes 109. The lifting rods 901 are connected to the third lifting module 701 that drives their lifting; it can be explained that in the initial state, the partition plate 104 is in a state of being embedded in the reserved groove 108. Please refer to Figure 11 , when the workpiece body 2 rises to separate from the conveyor belt 106, the third lifting module 701 can drive the lifting rods 901 to rise, and the lifting rods 901 can synchronously drive the partition plate 104 to rise to both sides of the workpiece body 2 (please refer to Figure 12 ). Therefore, as the clamping seat 601 descends, the first inclined surface 602 of the clamping seat 601 contacts the partition plate 104, and the partition plate 104 is used to clamp the workpiece body 2 to avoid the phenomenon that the first inclined surface 602 directly contacts the workpiece body 2 and causes damage to its side edge.

[0031] Please refer to Figure 6 and Figure 8, the first lifting module 7 includes first screws 903 symmetrically arranged on both sides of the detection end. The ends of the first screws 903 are fixedly provided with first gears 905. The thread directions on both sides of the first screws 903 are opposite. First nuts 904 are symmetrically and helically sleeved on the first screws 903. First push rods 902 are rotatably arranged on the first nuts 904. The other ends of the first push rods 902 are rotatably connected to the lifting plate 9. Among them, both ends of the U-shaped frame 603 are symmetrically and fixedly provided with lifting frames 604 respectively. The bottom ends of the lifting frames 604 are fixedly provided with driving plates 605. On one side of the two driving plates 605 close to each other, first racks 606 for meshing with the first gears 905 are fixedly provided. It can be explained that when the U-shaped frame 603 descends, it synchronously drives the lifting frames 604 to descend. The lifting frames 604 drive the first racks 606 to descend through the driving plates 605. The first racks 606 drive the first screws 903 to rotate by meshing with the first gears 905. During the movement of the first nuts 904 on the first screws 903, the lifting plate 9 can be driven to rise through the first push rods 902. In this embodiment, there is no need to use a servo drive device to drive the first screws 903 to rotate. When the U-shaped frame 603 descends, it can drive the first screws 903 to rotate, with higher synchronism and stability, and the cost is reduced.

[0032] In this embodiment, the third lifting module 701 includes second screws 907 symmetrically arranged on both sides of the detection end. The second screws 907 and the first screws 903 are arranged in a staggered manner in the vertical direction. The ends of the second screws 907 are fixedly provided with second gears 909. The thread directions on both sides of the second screws 907 are opposite. Second nuts 908 are symmetrically and helically sleeved on the second screws 907. Second push rods 910 are rotatably arranged on the second nuts 908. The other ends of the second push rods 910 are rotatably connected to the bearing plate 911. Among them, both sides of the lifting rods 901 are fixed to the bearing plate 911. On the other side of the driving plate 605, second racks 607 for meshing with the second gears 909 are fixedly provided. It can be explained that since the second screws 907 and the first screws 903 are arranged in a staggered manner in the vertical direction, when the first racks 606 are meshed with the first gears 905, the second racks 607 and the second gears 909 are in a non-meshing state. As the U-shaped frame 603 continues to descend, the meshing of the second racks 607 and the second gears 909 can drive the second screws 907 to rotate. During the movement of the second nuts 908 on the second screws 907, the bearing plate 911 can be pushed to rise through the second push rods 910, and the bearing plate 911 can synchronously drive the lifting rods 901 to rise. In this embodiment, there is also no need to set a servo drive device to drive the second screws 907 to rotate, further improving the automation degree and stability and reducing the cost of the driving parts.

[0033] In addition, the first screw rod 903 and the second screw rod 907 of this embodiment are both rotatably arranged on one side of the L-shaped bracket 906. A limiting rod 912 is arranged on one side of the first screw rod 903 and the second screw rod 907. The limiting rod 912 is fixed to the L-shaped bracket 906. The first nut 904 and the second nut 908 are both slidably sleeved on the limiting rod 912. Specifically, by arranging the limiting rod 912, the stability of the movement of the nut can be further improved.

[0034] Please refer to Figure 2 , Figure 6 and Figure 7 , the flipping module 8 includes a third gear 614 fixed to the first sleeve 613. Among them, drive frames 801 are respectively and fixedly arranged on both sides of the detection box body 401. A third rack 802 for meshing with the third gear 614 is fixedly arranged at the bottom of the drive frame 801. It can be explained that after the clamping seat 601 clamps and fixes the workpiece body 2, as the second lifting module 102 drives the clamping seat 601 and the workpiece body 2 to rise, after rising a certain height, the third gear 614 meshes with the third rack 802 to drive the first sleeve 613 to rotate. The first sleeve 613 synchronously drives the third gear 614 and the third rack 802 to rotate 90 degrees through the clamping rod 611. In this embodiment, there is no need to set other servo drive devices to adjust the angle of the workpiece body 2 after clamping, and the stability is higher.

[0035] In order to ensure that the first sleeve 613 can drive the clamping rod 611 to rotate stably, in this embodiment, a plurality of groups of first strip-shaped clamping seats 612 are fixedly arranged on the clamping rod 611 in a circumferential array. A strip-shaped clamping groove for slidingly engaging with the first strip-shaped clamping seat 612 is correspondingly formed in the first sleeve 613. It can be explained that the first sleeve 613 and the clamping rod 611 of this embodiment are slidably engaged through the first strip-shaped clamping seat 612 and the strip-shaped clamping groove, so that the first sleeve 613 can stably drive the clamping rod 611 to rotate synchronously when rotating.

[0036] Further, when the third gear 614 is not engaged with the third rack 802, in order to prevent the first sleeve 613 from rotating by itself, in this embodiment, a second sleeve 615 is fixedly arranged on the side of the third gear 614 away from the first sleeve 613. An L-shaped support plate 619 is fixedly arranged on one side of the limit frame 610. A lead screw 618 is spirally arranged in the L-shaped support plate 619. The lead screw 618 is fixed to the expansion rod 616 slidably inserted into the second sleeve 615. Among them, a plurality of groups of second strip-shaped chucks 617 are fixedly arranged on the expansion rod 616 in a circumferential array. A plurality of strip-shaped slots corresponding to and slidably engaged with the second strip-shaped chucks 617 are arranged in a circumferential array in the second sleeve 615; it can be explained that in this embodiment, by setting the lead screw 618 to be spirally connected with the L-shaped support plate 619, a certain force needs to be applied to drive the third gear 614 to rotate. When the third gear 614 is not engaged with the third rack 802, the clamping seat 601 will not rotate by itself either, and the stability is higher.

[0037] It can be referred to Figures 1-3 and Figure 7 , when the detection of the workpiece body 2 is completed, in order to facilitate the blanking, a horizontal cylinder 3 is also fixedly arranged on one side of the detection end. The horizontal cylinder 3 is fixed on the two side baffles 103. A push plate 105 is fixedly arranged on the side of the driving end of the horizontal cylinder 3 close to the detection end. Guide wheels 301 are rotatably arranged on both sides of the push plate 105 through brackets. A receiving plate 110 is fixedly arranged on the side of the detection end away from the horizontal cylinder 3. Among them, a wedge-shaped seat 608 is fixedly arranged on the clamping seat 601 correspondingly. The distance between the two wedge-shaped seats 608 is smaller than the distance between the two clamping seats 601. A second inclined surface 609 corresponding to the guide wheel 301 is arranged on the side of the wedge-shaped seat 608 close to the horizontal cylinder 3; it can be explained that when the detection of the workpiece body 2 is completed, as the clamping seat 601 places the workpiece body 2 on the lifting plate 9 again, the positions of the workpiece body 2 and the push plate 105 correspond. The horizontal cylinder 3 drives the push plate 105 to slide towards the detection end. Before the push plate 105 contacts the workpiece body 2, the guide wheel 301 first contacts the second inclined surface 609, and then can push the two wedge-shaped seats 608 away from each other. The wedge-shaped seat 608 drives the clamping seat 601 to separate from the partition plate 104. The second lifting module 102 drives the clamping seat 601 to rise. During the rising process, the partition plate 104 can be first driven to reset to the reserved groove 108. At this time, the horizontal cylinder 3 continues to push the push plate 105 to move, and the push plate 105 can push the workpiece body 2 from the lifting plate 9 to the receiving plate 110. As the driving end of the horizontal cylinder 3 resets, the second lifting module 102 drives the clamping seat 601 to rise to the initial position, and the lifting plate 9 can be reset synchronously. The conveyor belt 106 conveys the next group of workpiece bodies 2 to the detection end position.

[0038] A detection method for a workpiece surface defect detection device includes the following steps: Please refer toFigures 1-4 , in S1, the loading manipulator arranges several groups of workpiece bodies 2 on the conveyor belt 106 in sequence and conveys them to the detection end through the conveyor belt 106; In S2, the first lifting module 7 drives the workpiece body 2 to rise to the position of the side edge detection camera 5; In S3, the longitudinal moving mechanism 501, the transverse moving mechanism 502 and the rotating motor 503 cooperate to drive the side edge detection camera 5 to move around the periphery of the workpiece body 2; In S4, the side edge detection camera 5 acquires the side edge image of the workpiece body 2 to detect the side edge of the workpiece body 2; After the detection of the side edge is completed, the detection module 4 performs re-detection on the upper and lower surfaces of the workpiece body 2.

[0039] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it cannot be understood as a limitation to the present invention. In addition, "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0040] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", etc. 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, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0041] The above has described in detail an embodiment of the present invention, but the content described is only the preferred embodiment of the present invention and cannot be considered as used to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A workpiece surface defect detection device, including a conveying module (1) for sequentially conveying a workpiece body (2) to be detected towards the detection end; It is characterized in that Two lifting plates (9) are arranged at the detection end, and the two lifting plates (9) are symmetrically arranged on both sides of the conveyor belt (106). The lifting plates (9) are connected to a first lifting module (7) that drives their lifting; A positioning frame body (101) is also fixedly arranged at the detection end. A longitudinal moving mechanism (501) is fixedly arranged on the positioning frame body (101). The driving end of the longitudinal moving mechanism (501) is fixed to a transverse moving mechanism (502). The driving end of the transverse moving mechanism (502) is fixedly provided with a rotating motor (503), and the driving end of the rotating motor (503) is fixed to a side edge detection camera (5); Among them, a detection module (4) is also arranged in the positioning frame body (101), and the detection module (4) is used to detect the two side surfaces of the workpiece body (2).

2. An apparatus for detecting surface defects of a workpiece according to claim 1, characterized in that, A clamping module (6) for clamping and fixing the workpiece body (2) is also arranged in the positioning frame body (101), and the clamping module (6) is connected to the driving end of a second lifting module (102) fixedly arranged on the positioning frame body (101); Among them, a flipping module (8) is also arranged in the positioning frame body (101) for driving the clamped workpiece body (2) to rotate 90 degrees. The detection module (4) includes a detection box body (401) fixed on the positioning frame body (101). Surface detection cameras (403) are symmetrically arranged in the detection box body (401). A through groove (402) for embedding the workpiece body (2) is opened on the box wall of the detection box body (401).

3. An apparatus for detecting surface defects of a workpiece according to claim 2, characterized in that, The conveying module (1) also includes baffles (103) symmetrically arranged on both sides of the conveyor belt (106).

4. An inspection device for workpiece surface defects according to claim 2, characterized in that, The clamping module (6) includes a U-shaped frame (603) fixed to the driving end of the second lifting module (102). Limit frames (610) are symmetrically and fixedly arranged at both ends of the U-shaped frame (603). A first sleeve (613) is rotatably arranged on the limit frames (610). Clamping rods (611) are slidably inserted and arranged on the side close to each other of the two first sleeves (613). A telescopic spring fixed to the clamping rod (611) is fixedly arranged in the first sleeve (613). One end of the clamping rod (611) away from the first sleeve (613) is fixed to a clamping seat (601), and a first inclined surface (602) is opened on the bottom surface of the side close to each other of the two clamping seats (601).

5. The workpiece surface defect detection device according to claim 3, characterized in that, Convex plates (107) are fixedly arranged at the two side baffles (103) of the detection end. A reserved groove (108) is opened on the side close to each other of the two convex plates (107). A partition plate (104) is embedded in the reserved groove (108). Two through holes (109) are opened at the bottom of the reserved groove (108). A lifting rod (901) is slidably embedded in the through holes (109), and the lifting rod (901) is connected to a third lifting module (701) that drives its lifting.

6. The workpiece surface defect detection device according to claim 4, characterized in that, The first lifting module (7) includes first screws (903) symmetrically arranged on both sides of the detection end. A first gear (905) is fixedly arranged at the end of the first screw (903). First nuts (904) are symmetrically and spirally sleeved on the first screw (903). A first push rod (902) is rotatably arranged on the first nut (904). The other end of the first push rod (902) is rotatably connected to the lifting plate (9). Among them, lifting frames (604) are symmetrically and fixedly arranged at both ends of the U-shaped frame (603). A driving plate (605) is fixedly arranged at the bottom end of the lifting frame (604). A first rack (606) for meshing with the first gear (905) is fixedly arranged on one side of the two driving plates (605) close to each other.

7. An apparatus for detecting surface defects of a workpiece according to claim 5, characterized in that, The third lifting module (701) includes second screws (907) symmetrically arranged on both sides of the detection end. A second gear (909) is fixedly arranged at the end of the second screw (907). Second nuts (908) are symmetrically and spirally sleeved on the second screw (907). A second push rod (910) is rotatably arranged on the second nut (908). The other end of the second push rod (910) is rotatably connected to the bearing plate (911). Among them, the two lifting rods (901) are fixed on the bearing plate (911). A second rack (607) for meshing with the second gear (909) is fixedly arranged on the other side of the driving plate (605).

8. An workpiece surface defect detection device according to claim 4, characterized in that, The flipping module (8) includes a third gear (614) fixed on the first sleeve (613). Among them, driving frames (801) are respectively fixedly arranged on both sides of the detection box body (401). A third rack (802) for meshing with the third gear (614) is fixedly arranged at the bottom of the driving frame (801).

9. An inspection device for workpiece surface defects according to claim 4, characterized in that, A horizontal air cylinder (3) is also fixedly arranged on one side of the detection end. The horizontal air cylinder (3) is fixed on the two side baffles (103). A push plate (105) is fixedly arranged on the side of the driving end of the horizontal air cylinder (3) close to the detection end. Guide wheels (301) are rotatably arranged on both sides of the push plate (105) through brackets. A receiving plate (110) is fixedly arranged on the side of the detection end far from the horizontal air cylinder (3). Among them, a wedge-shaped seat (608) is correspondingly fixedly arranged on the clamping seat (601). The distance between the two wedge-shaped seats (608) is smaller than the distance between the two clamping seats (601). A second inclined surface (609) corresponding to the guide wheel (301) is arranged on the side of the wedge-shaped seat (608) close to the horizontal air cylinder (3).

10. A detection method for a workpiece surface defect detection device, characterized in that, Applied to a workpiece surface defect detection device as described in any one of claims 1-9, it includes the following steps: The loading manipulator arranges a plurality of groups of workpiece bodies (2) on the conveyor belt (106) in sequence and transports them to the detection end through the conveyor belt (106). The first lifting module (7) drives the workpiece body (2) to rise to the position of the side edge detection camera (5). The longitudinal moving mechanism (501), the transverse moving mechanism (502) and the rotating motor (503) cooperate to drive the side edge detection camera (5) to move around the periphery of the workpiece body (2). Obtain the side edge image of the workpiece body (2) through the side edge detection camera (5) to detect the side edge of the workpiece body (2); After the detection of the side edge is completed, the upper and lower surfaces of the workpiece body (2) are detected again by the detection module (4).

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