A mobile phone glass cover plate arc edge defect detection device

Abstract

The application relates to the technical field of optical detection, in particular to a mobile phone glass cover plate arc edge defect detection device which comprises an optical arc edge detection mechanism, the optical arc edge detection mechanism comprises infrared ray emitting plates and infrared ray receiving plates which are always parallel, both ends of the infrared ray emitting plates and the infrared ray receiving plates are fixedly connected with a fixed plate, and the top end and the bottom end of the fixed plate are fixedly connected with connecting strips. In order to realize accurate detection of the arc surface position of the glass cover plate and ensure that the reflection path of the detection light is predictable, the infrared ray emitting plates and the infrared ray receiving plates need to be always kept parallel, then the arc surface of the glass cover plate is detected through synchronous movement of the infrared ray emitting plates and the infrared ray receiving plates, when a range line with defects is detected, the infrared ray intensity received by the infrared ray receiving plate is weakened, after a signal is received by a PLC controller, a first motor is controlled to run for a set time, and the positions of the infrared ray receiver and the infrared ray emitter are adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical detection, and in particular to a mobile phone glass cover plate arc edge defect detection device. BACKGROUND

[0002] The mobile phone glass cover plate, also known as mobile phone screen protection glass or display cover plate, is a layer of glass material covering the surface of the mobile phone display screen. In order to achieve the anti-fingerprint function, the existing mobile phone glass cover plate is coated with a thin film of oil-repellent and water-repellent on the surface of the glass cover plate. This thin film can make the traces left by the fingers after touching not easy to remain, thus keeping the screen clean. This kind of glass cover plate is called coated glass cover plate. However, during the production process of the coated glass cover plate, impurities or bubbles in the glass raw material may cause cracking during processing, and improper temperature, time or cooling speed in the heat bending process may cause glass deformation or stress concentration, ultimately leading to defects in the arc edge of the produced mobile phone glass cover plate. Therefore, after the production of the mobile phone glass cover plate is completed, the arc edge defects of the mobile phone glass cover plate need to be detected. For example, the mobile phone glass cover plate arc edge defect detection device disclosed in application No. CN202010375093.1 is used to detect the arc edge defects of the mobile phone glass cover plate.

[0003] However, the existing mobile phone glass cover plate arc edge defect detection device usually detects defects by image shooting and image processing. Since the arc edge of the glass cover plate is at the edge of the glass cover plate and has a certain curvature, it is difficult to image optically, and the depth of field of the lens is generally limited, making it difficult to ensure clear imaging, especially at the edge position. Multiple reflections and scattering of light will make the image unclear, making it difficult to accurately capture defects. Therefore, this will make the defect features not obvious enough to be accurately recognized by image processing algorithms.

[0004] In addition, it can usually only detect defects, but cannot mark or identify the positions where defects exist. This is a deficiency for subsequent repair or quality control processes, because without marking, the operator may have difficulty quickly locating the specific position of the defect, thereby affecting efficiency and accuracy. SUMMARY

[0005] In view of the above-mentioned shortcomings of the prior art, the present application provides a mobile phone glass cover plate arc edge defect detection device, which can effectively solve the problems of inaccurate detection and inability to mark in the prior art.

[0006] To achieve the above purpose, the present application is implemented by the following technical solutions:

[0007] The present application provides a mobile phone glass cover plate arc edge defect detection device, comprising:

[0008] The optical arc edge detection mechanism comprises an always parallel infrared ray emitting plate and an infrared ray receiving plate, both ends of the infrared ray emitting plate and the infrared ray receiving plate are fixedly connected with a fixed plate, the top end and the bottom end of the fixed plate are fixedly connected with a connecting strip, the top end of the connecting strip at the bottom end is slidably connected with a first permanent magnet block, the top end of the first permanent magnet block is fixedly connected with an infrared ray emitter, the bottom end of the connecting strip at the top end is slidably connected with a second permanent magnet block, the bottom end of the second permanent magnet block is fixedly connected with an infrared ray receiver, and the axis of the infrared ray emitter and the infrared ray receiver coincides.

[0009] The marking mechanism comprises a pressing plate for determining the arc edge height, arc edge marking assemblies are connected on both sides of the pressing plate, the arc edge marking assemblies comprise omnidirectional moving marking pens, and the marking mechanism further comprises an arc surface marking assembly for marking arc surface defects.

[0010] Preferably, the operation table is further provided with a protective cover fixedly connected to the top end of the operation table, a conveying plate fixedly connected to the top end of the operation table, a placing groove formed in the interior of the conveying plate, and a moving groove formed in the top end of the conveying plate, wherein a connecting groove in communication with the placing groove is formed in the inner bottom surface of the moving groove.

[0011] Preferably, the conveying mechanism comprises a first electric telescopic rod fixedly connected to the inner wall of the placing groove, a connecting block fixedly connected to the telescopic end of the first electric telescopic rod, a sliding groove formed in the outer wall of the side of the connecting block away from the first electric telescopic rod, a sliding block slidably connected to the inner wall of the sliding groove, a push plate fixedly connected to the outer wall of the sliding block, limit grooves formed in the inner walls of both sides of the placing groove, limit rods slidably connected to the limit grooves and unidirectionally rotatably connected to the push plate, and a PLC controller electrically connected to the first electric telescopic rod and forming a conveying loop.

[0012] Preferably, a containing plate is slidably connected to the inner wall of the moving groove, an extension plate fixedly connected to the bottom end of the containing plate and slidably contacting the moving groove, the extension plate intermittently contacting the push plate, a first flexible fixing strip fixed to the top end of the containing plate, a fixing groove formed in the top end of the containing plate, a limit block slidably connected to the inner wall of the fixing groove, a first spring fixedly connected between the limit block and the fixing groove, a second flexible fixing strip fixedly connected to the top end of the limit block, the first flexible fixing strip and the second flexible fixing strip jointly clamping the glass cover plate, a clamping groove formed in the top end of the containing plate, and a clamping block fixedly connected to the other end of the containing plate and clamped with the clamping groove.

[0013] Preferably, the optical arc edge detection mechanism further comprises two symmetrical support columns fixedly connected at the top end of the operation table, the outer wall of the support column is fixedly connected with a support plate, the outer wall of the support plate is fixedly connected with a first motor, the output end of the first motor is on the same axis as the center of the arc edge of the glass cover plate, the output end of the first motor is fixedly connected with the outer wall of one of the fixed plates, the infrared emission plate, the infrared receiving plate, the first motor and the PLC controller are electrically connected and form a detection loop.

[0014] Preferably, the inside of the connecting strip is provided with a moving cavity, the inner wall of the moving cavity is slidably connected with a third permanent magnet magnetically attracted to the first permanent magnet and a fourth permanent magnet magnetically attracted to the second permanent magnet, the outer wall of the third permanent magnet and the fourth permanent magnet is fixedly connected with an airtight plate in airtight sliding connection with the inner wall of the moving cavity, the top end of the placement groove is fixedly connected with a micro air pump, the output end of the micro air pump is fixedly connected with a plurality of exhaust pipes, and the two air outlets of the plurality of exhaust pipes are respectively connected with the two moving cavities.

[0015] Preferably, the marking mechanism further comprises a fixed cover fixedly connected at the top end of the operation table, the inner bottom wall of the fixed cover is fixedly connected with a second electric telescopic rod, the telescopic end of the second electric telescopic rod is fixedly connected with a pressing plate, the two sides of the pressing plate are fixedly connected with a permanent magnet strip, and the bottom end of the pressing plate is embedded with a pressure sensor electrically connected with the PLC controller.

[0016] Preferably, the arc edge marking assembly comprises a lifting groove formed in the inner wall of the fixed cover on both sides, the inner wall of the lifting groove is fixedly connected with two symmetrical electromagnetic plates, the inner wall of the lifting groove is slidably connected with a permanent magnet lifting block magnetically attracted to the electromagnetic plate, the other end of the permanent magnet lifting block is fixedly connected with a third electric telescopic rod, the telescopic end of the third electric telescopic rod is fixedly connected with a marking shell, the inner top wall of the marking shell and the fixed cover are fixedly connected with a plurality of second springs, the outer wall of the marking shell is fixedly connected with a second motor, the output end of the second motor is fixedly connected with a reciprocating screw rod, the outer wall of the reciprocating screw rod is sleeved with a reciprocating block in sliding connection with the inner wall of the marking shell, the outer wall of the marking shell is fixedly connected with an electromagnetic strip magnetically attracted to the permanent magnet strip, the bottom end of the reciprocating block is fixedly connected with a marking pen, the bottom end of the reciprocating block is fixedly connected with a drying ring, and the second electric telescopic rod, the electromagnetic plate, the second motor and the electromagnetic strip are electrically connected with the PLC controller and form an arc edge marking loop.

[0017] Preferably, the arc surface marking assembly comprises a micro storage shell fixedly connected to the lower connecting strip side wall, the micro storage shell is filled with marking paint, the outer wall of the first permanent magnet block is fixedly connected with a traction rod, the other end of the traction rod is fixedly connected with a moving plate fixedly connected with the top end of the lower connecting strip, the top end of the moving plate is fixedly connected with a micro pump nozzle, and the micro pump nozzle and the micro storage shell are fixedly connected and communicated with an elastic feeding pipe, the infrared emitter, the infrared receiver, the micro pump nozzle, the micro air pump and the PLC controller are electrically connected and form an arc surface marking loop.

[0018] Compared with the known prior art, the technical scheme provided by the application has the following beneficial effects:

[0019] 1. In order to realize accurate detection of the arc surface position of the glass cover plate and ensure that the reflection path of the detection light is predictable, the infrared emitter plate and the infrared receiver plate need to be kept parallel at all times, and then the arc surface of the glass cover plate is detected through the synchronous movement of the infrared emitter plate and the infrared receiver plate. When the range line with defects is detected, the infrared intensity received by the infrared receiver plate will weaken. After the PLC controller receives the signal, the first motor is controlled to run for a set time, the position of the infrared receiver and the emitter is adjusted, then the air is pumped out by the micro air pump, the air-tight plate drives the permanent magnet block and the infrared assembly and the micro pump nozzle to move synchronously, when the infrared intensity received by the infrared receiver changes, the accurate defect position is found. Then the micro air pump is controlled to continue running for a set time and then stop, so that the micro pump nozzle is at the defect position. Finally, the micro pump nozzle is started by the PLC controller, and the marking paint in the micro storage shell is sprayed on the position where the defect is detected through the elastic feeding pipe, so as to ensure the accuracy and recognizability of the marking, so as to facilitate subsequent re-inspection processing.

[0020] 2. In the fixed cover, the second electric telescopic rod is controlled to move downward by the PLC controller, the pressing plate is pressed at the arc edge of the glass cover plate, and when the preset pressure is reached, the electromagnetic plate adsorbs the permanent magnet lifting block when the electromagnetic strip is de-energized, so that the marking shell is fixed. Then the second electric telescopic rod is controlled to reset, the third electric telescopic rod is started to move the marking pen to the upper surface of the arc edge of the glass cover plate, then the second motor is started to drive the reciprocating block to move so that the marking pen marks at the arc edge, and the drying ring dries the paint. In this way, the entire arc edge is marked, and the defect position is not marked, which facilitates the identification of the defect position in subsequent processing.

[0021] 3. This invention achieves automatic and continuous inspection of glass covers through a transport mechanism. The PLC controller controls the first electric telescopic rod to drive the push plate to move, so that the glass cover automatically enters the optical arc edge inspection mechanism. Multiple holding plates are tightly connected through slots and blocks to ensure that the inspection process is uninterrupted. This design improves inspection efficiency, realizes the continuity of transportation and inspection, reduces manual intervention, and makes automated inspection smoother. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention;

[0025] Figure 3 This is a three-dimensional structural diagram of the bottom end of the transport plate of the present invention;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the holding plate of the present invention;

[0027] Figure 5 This is a three-dimensional structural diagram of the optical arc edge detection mechanism of the present invention;

[0028] Figure 6 This is a partial three-dimensional structural diagram of the optical arc edge detection mechanism of the present invention;

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of a portion of the arc-edge marking component of the present invention;

[0030] Figure 8 This is a three-dimensional structural diagram of the fixing cover of the present invention;

[0031] Figure 9 In this invention Figure 5 Schematic diagram of Part A;

[0032] Figure 10 In this invention Figure 3 A schematic diagram of part B of the structure.

[0033] Mark: 1, operation platform; 2, protective cover; 3, transport plate; 4, placing groove; 5, moving groove; 6, connecting groove; 7, optical arc edge detection mechanism; 71, infrared emitter plate; 72, infrared receiver plate; 73, fixed plate; 74, connecting strip; 75, first permanent magnet block; 76, second permanent magnet block; 77, infrared emitter; 78, infrared receiver; 79, support column; 710, support plate; 711, first motor; 712, moving cavity; 713, third permanent magnet block; 714, fourth permanent magnet block; 715, airtight plate; 716, micro air pump; 717, multiple exhaust pipes; 8, marking mechanism; 81, pressure plate; 82, arc edge marking assembly; 821, marking pen; 822, lifting groove; 823, electromagnetic plate; 824, permanent magnet lifting block; 825, third electric telescopic rod; 826, marking shell; 827, second motor; 828, reciprocating screw rod; 829, reciprocating block; 8210, electromagnetic strip; 8211, drying ring; 83, arc surface marking assembly; 831, micro storage shell; 832, traction rod; 833, moving plate; 834, micro pump nozzle; 835, telescopic feeding pipe; 84, fixed cover; 85, second electric telescopic rod; 86, permanent magnet strip; 9, transport mechanism; 91, first electric telescopic rod; 92, connecting block; 93, sliding groove; 94, sliding block; 95, push plate; 96, limiting groove; 97, limiting rod; 98, containing plate; 99, extension plate; 910, first flexible fixing strip; 911, fixed groove; 912, limiting block; 913, second flexible fixing strip; 914, clamping groove; 915, clamping block. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0035] The present application will be further described in conjunction with the embodiments.

[0036] Embodiment: Reference Figures 1 to 10 A mobile phone glass cover plate arc edge defect detection device comprises:

[0037] The operation platform 1 is fixedly connected with the protective cover 2 at the top end, and the transport plate 3 is fixedly connected with the operation platform 1 at the top end. The placing groove 4 is formed in the inside of the transport plate 3, and the moving groove 5 is formed at the top end of the transport plate 3. The connecting groove 6 communicated with the placing groove 4 is formed in the inner bottom surface of the moving groove 5.

[0038] The optical arc edge detection mechanism 7 is arranged to detect the arc surface and arc edge defects of the glass cover plate by optics. Referring to Figure 5 、 Figure 6 、 Figure 9 The optical arc edge detection mechanism 7 includes an infrared emitter plate 71 and an infrared receiver plate 72 that are always parallel. The two ends of the infrared emitter plate 71 and the infrared receiver plate 72 are fixedly connected to a fixed plate 73. The top end and the bottom end of the fixed plate 73 are fixedly connected to a connecting strip 74. The top end of the connecting strip 74 at the bottom end is slidingly connected to a first permanent magnet block 75. The top end of the first permanent magnet block 75 is fixedly connected to an infrared emitter 77. The bottom end of the connecting strip 74 at the top end is slidingly connected to a second permanent magnet block 76. The bottom end of the second permanent magnet block 76 is fixedly connected to an infrared receiver 78. The axis of the infrared emitter 77 coincides with the axis of the infrared receiver 78. The infrared emitter plate 71 and the infrared receiver plate 72 are always parallel, so the infrared emitted by the infrared emitter plate 71 will always be received by the infrared receiver plate 72, and the infrared emitted by the infrared emitter 77 will always be received by the infrared receiver 78.

[0039] The optical arc edge detection mechanism 7 further includes two symmetrical support columns 79 fixedly connected to the top end of the operation table 1. The outer wall of the support column 79 is fixedly connected to a support plate 710. The outer wall of the support plate 710 is fixedly connected to a first motor 711. The output end of the first motor 711 is on the same axis as the center of the arc edge of the glass cover plate. The output end of the first motor 711 is fixedly connected to the outer wall of one of the fixed plates 73. The infrared emitter plate 71, the infrared receiver plate 72, and the first motor 711 are electrically connected to the PLC controller and form a detection loop.

[0040] The inside of the connecting strip 74 is provided with a moving cavity 712. The inner wall of the moving cavity 712 is slidingly connected to a third permanent magnet block 713 that is magnetically attracted to the first permanent magnet block 75 and a fourth permanent magnet block 714 that is magnetically attracted to the second permanent magnet block 76. The outer wall of the third permanent magnet block 713 and the fourth permanent magnet block 714 is fixedly connected to an airtight plate 715 that is airtightly slidingly connected to the inner wall of the moving cavity 712. The top end of the placing groove 4 is fixedly connected to a micro air pump 716. The output end of the micro air pump 716 is fixedly connected to a plurality of exhaust pipes 717. The two air outlets of the plurality of exhaust pipes 717 are respectively connected to the two moving cavities 712. The plurality of exhaust pipes 717 are flexible.

[0041] The marking mechanism 8 marks the arc surface defects and the arc edge defects. Referring to Figures 7 to 9The marking mechanism 8 comprises a pressing plate 81 for determining the height of the arc edge, two sides of the pressing plate 81 are connected with arc edge marking assemblies 82, the arc edge marking assemblies 82 comprise omnidirectional moving marking pens 821, the marking mechanism 8 further comprises arc surface marking assemblies 83 for marking arc surface defects, the marking mechanism 8 further comprises a fixed cover 84 fixedly connected at the top end of the operation table 1, the inner bottom wall of the fixed cover 84 is fixedly connected with a second electric telescopic rod 85, the telescopic end of the second electric telescopic rod 85 is fixedly connected with the pressing plate 81, both sides of the pressing plate 81 are fixedly connected with permanent magnet strips 86, and the bottom end of the pressing plate 81 is embedded with a pressure sensor in electrical signal connection with the PLC controller, wherein the pressure sensor is pre-set with an average pressure value that can be borne by the arc edge, so that the pressing plate 81 will not damage the glass cover plate, and the bottom end of the pressing plate 81 is at the same horizontal plane as the marking pen 821.

[0042] The arc edge marking assembly 82 comprises lifting grooves 822 opened in the inner walls of both sides of the fixed cover 84, the inner walls of the lifting grooves 822 are fixedly connected with two symmetrical electromagnetic plates 823, the inner walls of the lifting grooves 822 are slidingly connected with permanent magnet lifting blocks 824 magnetically attracted to the electromagnetic plates 823, the other end of the permanent magnet lifting block 824 is fixedly connected with a third electric telescopic rod 825, the telescopic end of the third electric telescopic rod 825 is fixedly connected with a marking shell 826, the marking shell 826 and the inner top wall of the fixed cover 84 are fixedly connected with a plurality of second springs, the outer wall of the marking shell 826 is fixedly connected with a second motor 827, the output end of the second motor 827 is fixedly connected with a reciprocating screw rod 828, the outer wall of the reciprocating screw rod 828 is sleeved with a reciprocating block 829 slidingly connected with the inner wall of the marking shell 826, the outer wall of the marking shell 826 is fixedly connected with an electromagnetic strip 8210 magnetically attracted to the permanent magnet strip 86, the bottom end of the reciprocating block 829 is fixedly connected with the marking pen 821, the bottom end of the reciprocating block 829 is fixedly connected with a drying ring 8211, the second electric telescopic rod 85, the electromagnetic plate 823, the second motor 827, the electromagnetic strip 8210 are in electrical signal connection with the PLC controller and form an arc edge marking loop, wherein the drying ring 8211 can quickly dry the paint applied by the marking pen 821 to prevent the paint from spreading.

[0043] The arc surface marking assembly 83 comprises a micro storage shell 831 fixedly connected to the side wall of the connecting strip 74 below, the micro storage shell 831 being filled with marking paint, the outer wall of the first permanent magnet block 75 being fixedly connected with a traction rod 832, the other end of the traction rod 832 being fixedly connected with a moving plate 833 fixedly connected with the top end of the connecting strip 74 below, the top end of the moving plate 833 being fixedly connected with a micro pump nozzle 834, and the micro pump nozzle 834 being fixedly connected in communication with the micro storage shell 831 through an elastic feeding pipe 835, the infrared emitter 77, the infrared receiver 78, the micro pump nozzle 834, the micro air pump 716 and the PLC controller being electrically connected and forming an arc surface marking loop, wherein the micro pump nozzle 834 can quantitatively spray paint each time, and the paint can be quickly air-dried to prevent the paint from flowing, and the paint is erasable.

[0044] The device also comprises a conveying mechanism 9, which comprises a first electric telescopic rod 91 fixedly connected to the inner wall of the placing groove 4, a connecting block 92 fixedly connected to the telescopic end of the first electric telescopic rod 91, a sliding groove 93 formed in the outer wall of the side of the connecting block 92 away from the first electric telescopic rod 91, a sliding block 94 slidably connected to the inner wall of the sliding groove 93, a push plate 95 fixedly connected to the outer wall of the sliding block 94, a limiting groove 96 formed in the inner wall of each side of the placing groove 4, and a limiting rod 97 slidably connected in the limiting groove 96 and unidirectionally rotatably connected with the push plate 95, the first electric telescopic rod 91 being electrically connected with the PLC controller and forming a conveying loop.

[0045] The inner wall of the moving groove 5 is slidably connected with a containing plate 98, the bottom end of the containing plate 98 is fixedly connected with an extension plate 99 in sliding contact with the moving groove 5, the extension plate 99 is intermittently in contact with the push plate 95, the top end of the containing plate 98 is fixedly connected with a first flexible fixing strip 910, the top end of the containing plate 98 is provided with a fixing groove 911, the inner wall of the fixing groove 911 is slidably connected with a limiting block 912, the first spring is fixedly connected between the limiting block 912 and the fixing groove 911, the top end of the limiting block 912 is fixedly connected with a second flexible fixing strip 913, the first flexible fixing strip 910 and the second flexible fixing strip 913 jointly clamp the glass cover plate, the top end of the containing plate 98 is provided with a clamping groove 914, and the other end of the containing plate 98 is fixedly connected with a clamping block 915 clamped with the clamping groove 914, a plurality of containing plates 98 are connected together through the clamping groove 914 and the clamping block 915 to ensure the continuity of detection.

[0046] The working principle of the present application is as follows:

[0047] Firstly, the second flexible fixing strip 913 is pulled out manually 913 , then the glass cover plate is placed on the containing plate 98, and then the second flexible fixing strip 913 is slowly loosened, and the glass cover plate is fixed through the first flexible fixing strip 910 and the second flexible fixing strip 913 (for example Figure 4), the middle line of the glass cover plate needs to be manually aligned with the middle line of the containing plate 98 during placement, and then it is placed into the placement slot, and the clamping block 915 of the front containing plate 98 is placed into the clamping groove 914 of the rear containing plate 98.

[0048] Then the first electric telescopic rod 91 is started, the first electric telescopic rod 91 pushes the connecting block 92 to move synchronously with the push plate 95, and since the limiting rod 97 fixedly connected with the push plate 95 moves in the limiting groove 96 (the movement direction of the limiting rod 97 is according to the direction of a-b-c-d Figure 3 moves in the direction of a-b-c-d, and since the push plate 95 is unidirectionally rotationally connected with the limiting rod 97, when the limiting rod 97 moves to the midpoint of b, it can only rotate upward, so that the path of the limiting rod 97 is not disordered), so the push plate 95 is pushed to move the extension plate 99 and the containing plate 98 forward, when the limiting rod 97 moves to the arc-shaped portion of the limiting groove 96, it moves downward, and then the push plate 95 drives the sliding block 94 to slide downward in the sliding groove 93, after the first electric telescopic rod 91 is reset, the push plate 95 returns to the extension plate 99 behind the new containing plate 98, so as to facilitate the next transportation.

[0049] Meanwhile, the front holding plate 98 will be between the optical arc edge detection mechanism 7, and then the first motor 711 is started by the PLC controller control, the fixed plate 73 is driven to rotate 90 degrees downward by the first motor 711, so that the infrared emission plate 71 and the infrared receiving plate 72 are on the upper and lower sides of the glass cover plate. The infrared emission plate 71 and the infrared receiving plate 72 are started by the PLC controller, the infrared emitted by the infrared emission plate 71 passes through the glass cover plate and is received by the infrared receiving plate 72. Since the infrared emission plate 71 and the infrared receiving plate 72 always maintain perpendicular on both sides of the glass cover plate, and the detection light color is red, and the red light irradiation is thin, the parallel condition of the infrared emission plate 71 and the infrared receiving plate 72 is used to ensure that the reflection path of the detection light on the glass cover plate arc edge is predictable, so as to realize the accurate detection of the arc edge position and shape through the accurate analysis of the reflection signal. The high sensitivity of infrared can capture subtle deviations or defects, even the tiny flaws or unevenness on the glass cover plate arc edge can be detected, ensuring the high quality of the product. Since the wavelength of infrared is longer, it is not sensitive to the interference of environmental light sources, and it can maintain the stability and accuracy of detection even in complex production environment. The selection of red detection light helps to improve the detection efficiency and accuracy. Because the wavelength of red light is longer, the penetration is strong, which can reduce the refraction and absorption of light in glass, so that more light reaches the detection area. The irradiation mode of fine beam further improves the detection resolution. Because the fine beam can concentrate energy and accurately focus on a specific part, it can detect smaller defects or irregularities, while reducing light scattering and improving signal purity, further enhancing the accuracy of detection. Therefore, the above-mentioned glass cover plate arc edge defect detection is more accurate;

[0050] When the mobile phone glass cover has defects, the infrared receiving plate 72 receives infrared light that changes the reflection angle and intensity of the infrared light, reducing the intensity of the infrared light received by the infrared receiving plate 72. Therefore, the infrared receiving plate 72 transmits an electrical signal to the PLC controller, which then controls the first motor 711 to run for a set time t1 and then stop rotating (t1 is the time required for the infrared receiver 78 and the infrared emitter 77 to be in the original position of the infrared receiving plate 72 and the infrared emitting plate 71). Then the PLC controller controls the micro-pump 716 to start, and the micro-pump 716 uniformly draws air from the two moving cavities 712 through the multiple exhaust pipes 717, thereby moving the air-tight plate 715 forward, thereby moving the third permanent magnet block 713 and the fourth permanent magnet block 714 forward, which in turn moves the first permanent magnet block 75 and the second permanent magnet block 76 forward under the action of magnetic attraction, thereby moving the infrared emitter 77 and the infrared receiver 78 forward. Then the traction rod 832 pulls the moving plate 833 to move the micro-pump nozzle 834 synchronously, when the strength of the infrared light received by the infrared receiver 78 will change, the electrical signal is transmitted to the PLC controller through the infrared receiver 78, and then the PLC controller makes the micro-pump 716 continue to run for a set time t2 and then stop running (t2 is the time required for the micro-pump nozzle 834 to be in the original position of the infrared emitter).

[0051] Then the PLC controller controls the micro-pump nozzle 834 to start, and the micro-pump nozzle 834 sprays the marking paint in the micro-pump nozzle 834 to the position where the defect is detected.

[0052] The glass cover plate in the fixed cover 84 will be controlled by the PLC controller to move downwards, and then the pressing plate 81 is pressed on the arc edge of the glass cover plate. When the pressure sensor reaches the pre-set pressure value, the PLC controller controls the electromagnetic strip 8210 to be powered off, so that the electromagnetic strip 8210 and the permanent magnet strip 86 are no longer attracted, and the electromagnetic plate 823 is powered on, the permanent magnet lifting block 824 is attracted by the electromagnetic plate 823, the second electric telescopic rod 85 drives the marking shell 826 to remain stationary, and the second electric telescopic rod 85 is controlled to reset, so that the second electric telescopic rod 85 can only drive the pressing plate 81 to reset, because the bottom end of the marking pen 821 is now at the same horizontal plane as the upper end of the arc edge of the glass cover plate. Then the third electric telescopic rod 825 is started by the PLC controller (the telescopic distance of the third electric telescopic rod 825 is pre-tested to be just enough to make the detection pen at the arc edge of the glass cover plate), the second motor 827 is started by the PLC controller, the second motor 827 drives the reciprocating screw rod 828 to rotate, the reciprocating block 829 is limited by the marking shell 826, and then the reciprocating block 829 drives the marking pen 821 to mark at the arc edge of the glass cover plate. At the same time, the marked paint is dried by the drying ring 8211. The arc edge of the glass cover plate is marked by the marking pen 821, and the defective and damaged positions will not be marked, so the positions not marked in the subsequent processing process are defects.

[0053] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for detecting arc edge defects in mobile phone glass covers, characterized in that, include: The operating table (1) has a protective cover (2) fixedly connected to the top of the operating table (1), a transport plate (3) fixedly connected to the top of the operating table (1), a placement groove (4) is provided inside the transport plate (3), a moving groove (5) is provided at the top of the transport plate (3), and a connecting groove (6) communicating with the placement groove (4) is provided on the inner bottom surface of the moving groove (5). An optical arc edge detection mechanism (7) includes an infrared emitting plate (71) and an infrared receiving plate (72) that are always parallel. The infrared emitting plate (71) and the infrared receiving plate (72) are always perpendicular to both sides of the glass cover plate, and the infrared emitting plate (71) and the infrared receiving plate (72) move synchronously to detect arc edge defects in the glass cover plate. Both ends of the infrared emitting plate (71) and the infrared receiving plate (72) are fixedly connected to a fixing plate (73). The top and bottom of the fixed plate (73) are fixedly connected to a connecting strip (74). The top of the connecting strip (74) at the bottom is slidably connected to a first permanent magnet block (75). The top of the first permanent magnet block (75) is fixedly connected to an infrared emitter (77). The bottom of the connecting strip (74) at the top is slidably connected to a second permanent magnet block (76). The bottom of the second permanent magnet block (76) is fixedly connected to an infrared receiver (78). The axes of the infrared emitter (77) and the infrared receiver (78) coincide. The connecting strip (74) has a movable cavity (712) inside, and the inner wall of the movable cavity (712) is slidably connected to a third permanent magnet block (713) that is magnetically attracted to the first permanent magnet block (75) and a fourth permanent magnet block (714) that is magnetically attracted to the second permanent magnet block (76). The optical arc edge detection mechanism (7) also includes two support columns (79) fixedly connected to the top of the operating table (1). The two support columns (79) are symmetrically arranged facing each other on both sides of the placement slot (4). A support plate (710) is fixedly connected to the outer wall of the support column (79). A first motor (711) is fixedly connected to the outer wall of the support plate (710). The output end of the first motor (711) is fixedly connected to the outer wall of one of the fixed plates (73). The infrared emitting plate (71), the infrared receiving plate (72), the first motor (711) are electrically connected to the PLC controller to form a detection circuit. The marking mechanism (8) includes a pressure plate (81) for determining the height of the arc edge, and arc edge marking components (82) are connected to both sides of the pressure plate (81). The arc edge marking components (82) include a marking pen (821) that can move in all directions. The marking mechanism (8) also includes an arc surface marking component (83) for marking arc surface defects. The transportation mechanism (9) includes a first electric telescopic rod (91) fixedly connected to the inner wall of the placement groove (4). A connecting block (92) is fixedly connected to the telescopic end of the first electric telescopic rod (91). A sliding groove (93) is provided on the outer wall of the connecting block (92) away from the first electric telescopic rod (91). A sliding block (94) is slidably connected to the inner wall of the sliding groove (93). A push plate (95) is fixedly connected to the outer wall of the sliding block (94). Limiting grooves (96) are provided on both inner walls of the placement groove (4). A limiting rod (97) is slidably connected to the limiting groove (96) and rotates unidirectionally with the push plate (95). The first electric telescopic rod (91) is electrically connected to a PLC controller and forms a transportation circuit. The inner wall of the moving groove (5) is slidably connected to a holding plate (98), and the bottom end of the holding plate (98) is fixedly connected to an extension plate (99) that slides in contact with the moving groove (5). The extension plate (99) and the push plate (95) are in intermittent contact. During the testing process, the glass cover is placed on the holding plate (98).

2. The device for detecting arc edge defects in mobile phone glass covers according to claim 1, characterized in that, The top of the holding plate (98) is fixed with a first flexible fixing strip (910), and the top of the holding plate (98) is provided with a fixing groove (911). The inner wall of the fixing groove (911) is slidably connected with a limiting block (912). A first spring is fixedly connected between the limiting block (912) and the fixing groove (911). The top of the limiting block (912) is fixedly connected with a second flexible fixing strip (913). The first flexible fixing strip (910) and the second flexible fixing strip (913) together clamp the glass cover plate. The top of the holding plate (98) is provided with a slot (914), and the other end of the holding plate (98) is fixedly connected with a locking block (915) that engages with the slot (914).

3. The device for detecting arc edge defects in mobile phone glass covers according to claim 2, characterized in that, The outer walls of the third permanent magnet block (713) and the fourth permanent magnet block (714) are fixedly connected to an airtight plate (715) that is airtightly slidably connected to the inner wall of the moving cavity (712). The top of the placement groove (4) is fixedly connected to a micro air pump (716). The output end of the micro air pump (716) is fixedly connected to a multi-port exhaust pipe (717), and the two air outlets of the multi-port exhaust pipe (717) are respectively connected to the two moving cavities (712).

4. The mobile phone glass cover arc edge defect detection device according to claim 3, characterized in that, The marking mechanism (8) also includes a fixed cover (84) fixedly connected to the top of the operating table (1). A second electric telescopic rod (85) is fixedly connected to the inner bottom wall of the fixed cover (84). The telescopic end of the second electric telescopic rod (85) is fixedly connected to the pressure plate (81). Permanent magnet strips (86) are fixedly connected to both sides of the pressure plate (81). A pressure sensor that is electrically connected to the PLC controller is embedded at the bottom of the pressure plate (81).

5. The mobile phone glass cover arc edge defect detection device according to claim 4, characterized in that, The arc-edge marking assembly (82) includes lifting grooves (822) opened on the inner walls of both sides of the fixed cover (84). Two symmetrical electromagnetic plates (823) are fixedly connected to the inner wall of the lifting grooves (822). A permanent magnet lifting block (824) magnetically attracted to the electromagnetic plates (823) is slidably connected to the inner wall of the lifting grooves (822). A third electric telescopic rod (825) is fixedly connected to the other end of the permanent magnet lifting block (824). A marking shell (826) is fixedly connected to the telescopic end of the third electric telescopic rod (825). A plurality of second springs are fixedly connected to the marking shell (826) and the inner top wall of the fixed cover (84). A second motor is fixedly connected to the outer wall of the marking shell (826). (827), the output end of the second motor (827) is fixedly connected to a reciprocating lead screw (828), the outer wall of the reciprocating lead screw (828) is fitted with a reciprocating block (829) that is slidably connected to the inner wall of the marking shell (826), the outer wall of the marking shell (826) is fixedly connected to an electromagnetic strip (8210) that is magnetically attracted to the permanent magnet strip (86), the bottom end of the reciprocating block (829) is fixedly connected to the marking pen (821), and the bottom end of the reciprocating block (829) is fixedly connected to a drying ring (8211). The second electric telescopic rod (85), the electromagnetic plate (823), the second motor (827), the electromagnetic strip (8210) are electrically connected to the PLC controller and form an arc-edge marking circuit.

6. The mobile phone glass cover arc edge defect detection device according to claim 5, characterized in that, The arc-shaped marking assembly (83) includes a miniature storage shell (831) fixedly connected to the side wall of the lower connecting strip (74), the miniature storage shell (831) being filled with marking pigment, a traction rod (832) fixedly connected to the outer wall of the first permanent magnet block (75), the other end of the traction rod (832) being fixedly connected to a movable plate (833) fixedly connected to the top of the lower connecting strip (74), the top of the movable plate (833) being fixedly connected to a miniature pump nozzle (834), and a telescopic feeding pipe (835) being fixedly connected between the miniature pump nozzle (834) and the miniature storage shell (831). The infrared transmitter (77), infrared receiver (78), miniature pump nozzle (834), miniature vacuum pump (716) are electrically connected to the PLC controller to form an arc-shaped marking circuit.

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