Automatic detection system for coating defects

Abstract

The invention discloses an automatic detection system for coating defects, which comprises a carrier for loading a product to be detected and a detection unit, and further comprises a first X-direction driving module, a second X-direction driving module and a Y-direction driving module which are arranged at intervals, the detection unit installed on the movable part of the Y-direction driving module can move to the position above the carrier on the first X-direction driving module or the position above the carrier on the second X-direction driving module in the Y direction. The detection unit mounted on the movable part of the Y-direction driving module through a substrate comprises a spray valve, a camera for shooting a to-be-detected product, a wiping block, a cloth releasing module and a cloth collecting module; and the spray valve and the wiping block are sequentially arranged along the moving direction of a carrier on the first X-direction driving module and the second X-direction driving module. According to the invention, continuous monitoring of products can be realized, the detection efficiency is improved, and the detection precision and the detection comprehensiveness of defects of various types and various areas can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coating detection, and in particular to an automatic detection system for coating defects. Background Art

[0002] In the processing of glass products, a coating process is often required, the purpose of which is to improve the anti-aging and friction resistance of the product surface. However, in actual industrial production, the coating process cannot achieve uniform coverage, and often leads to poor coating due to many limitations. Therefore, the coated surface needs to be inspected after the coating is completed. Currently, manual visual observation is generally used in the industry. The specific method is that the manual operator uses a cloth to dip the detection liquid and apply it to the surface of the object to be inspected. The detection liquid is generally alcohol or water vapor, and the human eye is used to detect defects at the same time. However, manual visual observation is costly, difficult, and inefficient, which can easily lead to poor observation results, thereby affecting the judgment of the coating effect of glass products. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an automatic detection system for coating defects, which can realize continuous monitoring of products, improve detection efficiency, and also improve detection accuracy and comprehensiveness of detection of defects of various types and regions.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an automatic detection system for coating defects, comprising: a carrier for loading a product to be detected and a detection unit, and also comprising: a first X-direction driving module, a second X-direction driving module and a Y-direction driving module arranged at intervals, the first X-direction driving module and the second X-direction driving module are each equipped with the carrier on their respective movable parts, and the detection unit installed on the movable part of the Y-direction driving module can be moved along the Y direction to the upper part of the carrier on the first X-direction driving module or the upper part of the carrier on the second X-direction driving module; The detection unit installed on the movable part of the Y-axis driving module through a substrate includes: a spray valve, a camera for photographing the product to be detected, a wiping block, a cloth placing module and a cloth collecting module. The spray valve and the wiping block are arranged in sequence along the moving direction of the carrier on the first X-axis driving module and the second X-axis driving module. A light source is arranged below the camera. The wiping block is movably arranged below the light source. A wiping cloth is wound around the cloth placing module, the wiping block and the cloth collecting module. A wiping head for contacting the product to be detected through the wiping cloth is arranged at the end of the wiping block. A plurality of liquid outlets are opened on the wiping block, each of which is communicated with a liquid flow channel arranged in the wiping block. The liquid flow channel and the spray valve are each connected to the liquid supply unit through a pipeline.

[0005] The further improved scheme in the above technical scheme is as follows: 1. In the above scheme, the area of ​​the wiping head close to the wiping block is provided with at least two liquid outlet hole groups spaced apart in the moving direction of the wiping cloth, each liquid outlet hole group is composed of a plurality of liquid outlet holes spaced apart in the width direction of the wiping cloth and each of which is in contact with the wiping cloth, the liquid outlet holes located in different liquid outlet hole groups are staggered in the width direction of the wiping cloth, and the liquid outlet hole group is located on the side of the wiping head close to the cloth placing module in the moving direction of the wiping cloth.

[0006] 2. In the above scheme, the first guide bar and the second guide bar are respectively arranged in the movement direction of the wiping cloth and between the cloth placing module and the wiping head, and between the wiping head and the cloth collecting module, so that the wiping cloth is wound around the first guide bar and the second guide bar, and the first pressure bar and the second pressure bar are respectively arranged on the side of the wiping cloth opposite to the first guide bar and the second guide bar, and the first pressure bar and the second pressure bar respectively connected to the driving module can move in the direction close to or away from the first guide bar and the second guide bar accordingly.

[0007] 3. In the above scheme, the spray valve is installed on the base plate through a fixing plate, and the lower end of the spray valve passes through a through hole opened on the fixing plate, so that the nozzle at the lower end of the spray valve is located below the fixing plate, and a protective cover is installed on the lower surface of the fixing plate and outside the spray radiation area of ​​the nozzle. The protective cover is provided with a collecting cover with an upper end opening on the side opposite to the camera, and the collecting cover is connected to a negative pressure collector through a pipeline.

[0008] 4. In the above scheme, an outer protective cover is installed on the surface of the protective cover opposite to the camera side, and a first notch is provided on the side wall of the protective cover facing the collecting cover, and a second notch is provided on the side wall of the protective cover facing the first notch, and the upper end of the second notch is higher than the upper end of the first notch.

[0009] 5. In the above solution, both ends of the first X-direction driving module are respectively provided with a first loading mechanism and a first unloading mechanism cooperating with the carrier thereon.

[0010] 6. In the above solution, the two ends of the second X-axis driving module are respectively provided with a second loading mechanism and a second unloading mechanism cooperating with the carrier thereon.

[0011] 7. In the above scheme, a sub-driving module is installed on the substrate and located on the side of the camera opposite to the spray valve. The movable part of this sub-driving module is connected to a supporting vertical plate. The cloth placing module, cloth collecting module and several guide rollers arranged between the cloth placing module and the wiping head and between the wiping head and the cloth collecting module are all installed on the supporting vertical plate.

[0012] 8. In the above scheme, the wiping block further includes a horizontal plate and a bending plate located at the end of the horizontal plate, the wiping head is arranged on the end of the bending plate opposite to the horizontal plate, the end of the horizontal plate opposite to the bending plate is connected to a supporting plate, and the supporting plate is connected to the supporting vertical plate through a bracket.

[0013] 9. In the above solution, a guide shaft installed on the support plate is provided below the horizontal plate of the wiping block opposite to the end of the bending plate.

[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The automatic detection system for coating defects of the present invention comprises a detection unit including a spray valve, a camera for photographing a product to be detected, a wiping block, a cloth placing module and a cloth collecting module. The spray valve and the wiping block are sequentially arranged along the moving direction of the carrier on the first X-axis driving module and the second X-axis driving module. A light source is arranged below the camera. The wiping block is movably arranged below the light source. A wiping cloth is wound around the cloth placing module, the wiping block and the cloth collecting module. A wiping head for contacting the product to be detected through the wiping cloth is arranged at the end of the wiping block. A plurality of liquid outlets are provided on the wiping block. Each liquid outlet is communicated with a liquid flow channel arranged in the wiping block. The liquid flow channel and the spray valve are each connected to a liquid supply unit through a pipeline. The detection liquid is firstly and then continuously atomized and sprayed on the product to be detected and wiped with the soaked cloth, so as to improve the detection liquid in the product to be detected. The uniformity and sufficiency of the surface distribution of the detection product are detected, so as to improve the consistency of the dissipation of the detection liquid on the surface of the product to be detected and the difference of the dissipation traces in the complete coating area and the defective coating area, so as to improve the detection accuracy and the comprehensiveness of the detection of defects of various types and regions; further, it includes a first X-axis driving module, a second X-axis driving module and a Y-axis driving module arranged at intervals, and a carrier is installed on the movable part of each of the first X-axis driving module and the second X-axis driving module. The detection unit installed on the movable part of the Y-axis driving module can be moved along the Y direction to the top of the carrier on the first X-axis driving module or the top of the carrier on the second X-axis driving module. Through the cooperation of one detection unit and two carriers, continuous monitoring of the product can be realized, avoiding the detection suspension caused by loading and unloading, and improving the detection efficiency.

[0015] 2. The automatic detection system for coating defects of the present invention is provided with a first guide bar and a second guide bar respectively in the moving direction of the wiping cloth and between the cloth placing module and the wiping head, and between the wiping head and the cloth collecting module, so that the wiping cloth is wound around the first guide bar and the second guide bar, and a first pressure bar and a second pressure bar are respectively provided on the side of the wiping cloth opposite to the first guide bar and the second guide bar, and the first pressure bar and the second pressure bar respectively connected to the driving module can move in the direction close to or away from the first guide bar and the second guide bar respectively, so as to facilitate the installation of the wiping cloth, and the tightness of the wiping cloth outside the wiping head can be controlled within a reasonable range during the moving wiping process, which can not only avoid the influence of the wiping head pressure and the compression of the wiping area due to the wiping cloth being too tight, but also avoid the The wiping cloth is too loose, resulting in tangled mess; the area of ​​wiping cloth wrapped around the outside of the wiping head is too large, affecting the penetration of the wiping liquid; and during the moving wiping process, the wiping cloth moves relative to the wiping head and sticks to the product or stacks up, resulting in abnormal wiping pressure and damage to the product. In addition, a protective cover is installed on the lower surface of the fixed plate and outside the spray radiation area of ​​the nozzle. A collecting cover with an upper opening is provided on the side of the protective cover opposite to the camera. The collecting cover is connected to a negative pressure collector through a pipeline, which can effectively avoid the risk of overflow of liquid sprayed out of the spray valve and adverse interference to the product, and can also collect and discharge excess spray in time to avoid long-term accumulation of water mist and condensation into liquid dripping to pollute the machine and create safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 It is a front view of the automatic detection system for coating defects of the present invention; Attached Figure 2 A top view of the automatic detection system for coating defects of the present invention; Attached Figure 3 It is a schematic diagram of the local structure of the automatic detection system for coating defects of the present invention in the wiping state; Attached Figure 4 It is a partial structural cross-sectional view of a wiping block in the automatic detection system for coating defects of the present invention; Attached Figure 5 It is a schematic diagram of the structure between the wiping cloth and the pressure strip in the detection system of the present invention; Attached Figure 6 A partial schematic diagram of the automatic detection system for coating defects of the present invention Figure 1 ; Attached Figure 7 A partial schematic diagram of the automatic detection system for coating defects of the present invention Figure 2 ; Attached Figure 8 A partial schematic diagram of the automatic detection system for coating defects of the present invention Figure 3 ; Attached Fig. 9A partial schematic diagram of the automatic detection system for coating defects of the present invention Figure 4 ; Attached Fig.10 It is a schematic diagram of a liquid supply unit in the automatic detection system for coating defects of the present invention.

[0017] In the above figures: 100, product to be tested; 200, carrier; 300, testing unit; 301, substrate; 400, first X-axis driving module; 500, second X-axis driving module; 600, Y-axis driving module; 700, sub-driving module; 1, wiping block; 101, horizontal plate; 102, bending plate; 2, wiping head; 3, liquid outlet group; 301, liquid outlet; 4, liquid flow channel; 41, liquid inlet; 5, wiping cloth; 61, cloth placing module; 62, cloth collecting module; 63, guide roller; 7, supporting vertical plate; 81, first Block; 82, second block; 91, liquid supply barrel; 92, liquid supply pump; 11, camera; 12, light source; 13, spray valve; 16, support plate; 17, bracket; 191, first guide strip; 192, second guide strip; 20, first pressure strip; 21, second pressure strip; 22, drive module; 23, guide shaft; 24, fixing plate; 25, nozzle; 26, through hole; 27, spray radiation area; 28, protective cover; 29, collecting cover; 30, negative pressure collector; 31, outer protective cover; 321, first notch; 322, second notch. DETAILED DESCRIPTION

[0018] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0019] Embodiment 1: An automatic detection system for coating defects, comprising: a carrier 200 for loading a product 100 to be detected and a detection unit 300, such as Figure 2 As shown, it also includes: a first X-direction driving module 400, a second X-direction driving module 500 and a Y-direction driving module 600 arranged at intervals, the first X-direction driving module 400 and the second X-direction driving module 500 are each equipped with the carrier 200 on their respective movable parts, and the detection unit 300 installed on the movable part of the Y-direction driving module 600 can move along the Y direction to above the carrier 200 on the first X-direction driving module 400 or above the carrier 200 on the second X-direction driving module 500; The detection unit 300 mounted on the movable part of the Y-axis driving module 600 through a substrate 301 includes: a spray valve 13, a camera 11 for photographing the product 100 to be detected, a wiping block 1, a cloth placing module 61 and a cloth collecting module 62. The spray valve 13 and the wiping block 1 are sequentially arranged along the moving direction of the carrier 200 on the first X-axis driving module 400 and the second X-axis driving module 500. A light source 12 is arranged below the camera 11. The wiping block 1 is movably arranged below the light source 12. A wiping cloth 5 is wound around the cloth placing module 61, the wiping block 1 and the cloth collecting module. On the module 62, the positioning axis of the cloth retracting and releasing system is adjustable and easy to disassemble. It can be quickly replaced after the wiping cloth is consumed, and can also be adapted to dust-free cloths of different materials and elasticity to improve compatibility with different detection requirements. A wiping head 2 is provided at the end of the wiping block 1 for contacting the product 100 to be detected through the wiping cloth 5. A plurality of liquid outlet holes 301 are provided on the wiping block 1, and each of the liquid outlet holes 301 is connected to a liquid flow channel 4 provided in the wiping block 1. The liquid flow channel 4 and the spray valve 13 are each connected to a liquid supply unit through a pipeline.

[0020] The wiping block 1 is provided with a liquid inlet 41 on both sides of the liquid flow channel 4. The two liquid inlets 41 connected to the liquid flow channel 4 are connected to the liquid supply unit through pipelines. The liquid supply unit further includes a liquid supply barrel 91 with a detection liquid therein and a liquid supply pump 92. The liquid supply barrel 91 is connected to the spray valve 13 through a pipeline for conveying a test liquid (such as 90% ethanol) to the spray valve 13. The spray valve 13 atomizes the test liquid and sprays it onto the surface to be tested of the product 100 to form uniformly distributed mist beads on the surface to be tested. The spray valve is purchased from outside and belongs to the scope of the prior art, which will not be described in detail here. It should be noted that the choice of test liquid is related to the physical and chemical properties of the surface of the product to be tested, and there is a wide range of options for its type. Priority can be given to liquids that evaporate quickly and leave no residue. It also needs to meet the requirements of being non-corrosive, causing no damage to the surface of the product to be tested, and causing no serious harm to the human body.

[0021] The area of ​​the wiping head 2 close to the wiping block 1 is provided with at least two liquid outlet hole groups 3 spaced apart in the moving direction of the wiping cloth 5, each liquid outlet hole group 3 is composed of a plurality of liquid outlet holes 301 spaced apart along the width direction of the wiping cloth 5 and each of which is in contact with the wiping cloth 5, the liquid outlet holes 301 located in different liquid outlet hole groups 3 are staggered in the width direction of the wiping cloth 5, and in the moving direction of the wiping cloth 5, the liquid outlet hole group 3 is located on the side of the wiping head 2 close to the cloth placing module 61, and by setting the distribution pattern of the liquid outlet holes, various types of glass coating defects can be effectively detected, with high compatibility.

[0022] The direction of the above-mentioned liquid flow channel 4 is parallel to the arrangement direction of the multiple liquid outlet holes 301 evenly distributed in each liquid outlet hole group 3, so that the connection distance between each liquid outlet hole in the same liquid outlet hole group and the liquid flow channel is the same, thereby improving the uniformity of the liquid in the liquid flow channel wetting the outer wiping cloth after overflowing from the liquid outlet hole.

[0023] The wiping block 1 is provided with at least two first stops 81 spaced apart along the moving direction of the wiping cloth 5 and at least two second stops 82 opposite to the first stops 81. The wiping cloth 5 is movably arranged between the first stop 81 and the second stop 82. By reasonably adjusting the positions of the baffles at both ends of the cloth-releasing roller and the cloth-collecting roller and the guide strips at both ends of the guide roller, in cooperation with the first stop and the second stop on the wiping block, the wiping cloth can maintain a stable position during the whole process of the retracting and wiping operation, thereby avoiding the problem that the liquid in the liquid flow channel of the wiping head seeps out from the side and drips directly onto the product due to the deviation and skewness of the wiping cloth, as well as the interference and damage to the product during the contact between the wiping block and the product, thereby effectively ensuring the wiping effect.

[0024] The above-mentioned spray valve 13 is installed on the substrate 301 through a fixing plate 24. The lower end of the above-mentioned spray valve 6 passes through the through hole 26 opened on the fixing plate 24, so that the nozzle 25 at the lower end of the spray valve 6 is located below the fixing plate 24. A protective cover 28 is installed on the lower surface of the above-mentioned fixing plate 24 and outside the spray radiation area 27 of the nozzle 25. This protective cover 28 is provided with a collecting cover 29 with an upper end opening on the side opposite to the camera 11. This collecting cover 29 is connected to a negative pressure collector 30 through a pipeline. The negative pressure collector is purchased from outside and belongs to the scope of the prior art, which will not be described here.

[0025] An outer protective cover 31 is installed on the surface of the protective cover 28 opposite to the camera 2. In addition, a first notch 321 is provided on the side wall of the protective cover 31 facing the collecting cover 29. A second notch 322 is provided on the side wall of the protective cover 28 facing the first notch 321. The upper end of the second notch 322 is higher than the upper end of the first notch 321, which can further improve the efficiency of collecting excess water mist.

[0026] The two ends of the first X-axis driving module 400 are respectively provided with a first loading mechanism and a first unloading mechanism (not shown in the figure) cooperating with the carrier 200 thereon; the two ends of the second X-axis driving module 500 are respectively provided with a second loading mechanism and a second unloading mechanism (not shown in the figure) cooperating with the carrier 200 thereon.

[0027] Embodiment 2: An automatic detection system for coating defects, comprising: a carrier 200 and a detection unit 300 for loading a product 100 to be detected, and further comprising: a first X-direction drive module 400, a second X-direction drive module 500 and a Y-direction drive module 600 arranged at intervals, wherein the carrier 200 is mounted on the movable part of each of the first X-direction drive module 400 and the second X-direction drive module 500, and the detection unit 300 mounted on the movable part of the Y-direction drive module 600 can be moved along the Y direction to above the carrier 200 on the first X-direction drive module 400 or above the carrier 200 on the second X-direction drive module 500; The detection unit 300 mounted on the movable part of the Y-axis driving module 600 through a substrate 301 includes: a spray valve 13, a camera 11 for photographing the product 100 to be detected, a wiping block 1, a cloth placing module 61 and a cloth collecting module 62. The spray valve 13 and the wiping block 1 are sequentially arranged along the moving direction of the carrier 200 on the first X-axis driving module 400 and the second X-axis driving module 500. A light source 12 is arranged below the camera 11. The wiping block 1 A wiping cloth 5 is movably arranged below the light source 12, and is wound around the cloth placing module 61, the wiping block 1 and the cloth collecting module 62. A wiping head 2 is arranged at the end of the wiping block 1 for contacting the product 100 to be detected through the wiping cloth 5. A plurality of liquid outlet holes 301 are opened on the wiping block 1, and each of the liquid outlet holes 301 is connected to a liquid flow channel 4 arranged in the wiping block 1. The liquid flow channel 4 and the spray valve 13 are respectively connected to the liquid supply unit through a pipeline.

[0028] The first guide bar 191 and the second guide bar 192 are respectively arranged in the movement direction of the wiping cloth 5 and between the cloth placing module 61 and the wiping head 2, and between the wiping head 2 and the cloth collecting module 62, so that the wiping cloth 5 is wound around the first guide bar 191 and the second guide bar 192, and the first pressure bar 20 and the second pressure bar 21 are respectively arranged on the side of the wiping cloth 5 opposite to the first guide bar 191 and the second guide bar 192, and the first pressure bar 20 and the second pressure bar 21 respectively connected to the driving module 22 can move in the direction close to or away from the first guide bar 191 and the second guide bar 192 accordingly.

[0029] A sub-driving module 700 is installed on the above-mentioned substrate 301 and is located on the side of the camera 11 opposite to the spray valve 13. The movable part of this sub-driving module 700 is connected to a supporting vertical plate 7. The above-mentioned cloth placing module 61, cloth collecting module 62 and a plurality of guide rollers 63 arranged between the cloth placing module 61 and the wiping head 2, and between the wiping head 2 and the cloth collecting module 62 are all installed on the above-mentioned supporting vertical plate 7.

[0030] The wiping block 1 further includes a horizontal plate 101 and a bending plate 102 located at the end of the horizontal plate 101. The wiping head 2 is arranged on the end of the bending plate 102 opposite to the horizontal plate 101. The end of the horizontal plate 101 opposite to the bending plate 102 is connected to a support plate 16, and the support plate 16 is connected to the support vertical plate 7 through a bracket 17.

[0031] A guide shaft 23 mounted on the support plate 16 is disposed below the horizontal plate 11 of the wiping block 1 and opposite to the end of the bending plate 12 .

[0032] Working principle: Used to detect defects on the coated surface of glass products such as the glass back panel of electronic products, where the coated surface is the surface to be wiped or the surface to be tested; For the detection unit: the rolled strip-shaped wiping cloth is mounted on the cloth placing module, and the first pressing strip and the second pressing strip are driven by the driving module to move away from the first guide strip and the second guide strip respectively, so as to form a gap for the wiping cloth to pass through between the first pressing strip and the first guide strip, and between the second pressing strip and the second guide strip; Then, one end of the wiping cloth is passed through the first guide strip, one side surface of the wiping block, the wiping head, the other side surface of the wiping block and the second guide strip in sequence and then installed on the cloth collecting module, wherein the wiping cloth can also be guided and reversed by the guide roller 63; Furthermore, the contact area between the wiping cloth and the wiping head can be reduced by the first guide strip higher than the wiping head and the guide shaft lower than the wiping head, which not only facilitates the movement of the wiping cloth but also reduces the wear on the wiping cloth. After the installation is completed, while the wiping cloth is kept in a tensioned state, the driving module drives the first pressure strip and the second pressure strip to move toward the first guide strip and the second guide strip respectively and press the wiping cloth wound around the first guide strip and the second guide strip, so that when the wiping head drives the wiping cloth to wipe the surface to be tested, the wiping cloth in contact with the surface to be tested is kept in a tensioned state, so as to avoid the situation in which the wiping cloth moves relative to the wiping head during the moving wiping process and sticks to the product or is stacked, resulting in abnormal wiping pressure and damage to the product; The wiping cloth can be driven by the cloth collecting module to move from the cloth placing module to the cloth collecting module, so that during the movement, one side surface of the wiping cloth successively slides in contact with the liquid outlet area on the wiping block and the outer surface of the wiping head; Liquid such as alcohol is injected into the liquid flow channel on the wiping block through a pipeline, and the liquid can overflow from the liquid outlet hole to soak the wiping cloth wrapped around the wiping block and located outside the liquid outlet hole.

[0033] During the test, the product to be tested is loaded onto a carrier that can be moved under the drive of the first X-direction driving module, and the coated surface of the product to be tested is facing upward. Then, the Y-direction driving module and the first X-direction driving module move in coordination, so that the carrier first moves the product to be tested to below the nozzle of the spray valve, and the spray valve atomizes the test liquid and sprays it onto the coated surface of the product to be tested, thereby forming evenly distributed fine mist beads on the coated surface; When the spray valve sprays atomized liquid outward, the protective cover is used to shield the mist liquid and confine it within a certain range to avoid the risk of overflow of the detection liquid and adverse interference with the product; The product to be inspected is first moved to the bottom of the camera by the carrier, and then the sub-drive module drives the wiping head on the wiping block to drive the tensioned wiping cloth to wipe the coating surface of the product to be inspected with fine mist beads evenly distributed on it. The camera then takes a picture to capture the image data formed by the inspection liquid that evaporates and dissipates within a certain period of time in the complete coating area and the defective coating area, thereby completing the capture and analysis of the defect morphology and laying a preliminary physical foundation for the accurate recognition of the deep learning algorithm. While the detection unit is detecting the product on the carrier of the first X-axis drive module, loading and unloading operations are performed on the carrier of the second X-axis drive module. By switching in this way, through the cooperation of one detection unit and two carriers, continuous monitoring of the product can be achieved, avoiding the situation where detection suspension is caused by loading and unloading, and improving the efficiency of detection.

[0034] Before wiping, move the wiping cloth soaked in liquid on the outside of the liquid outlet for a short distance to the outside of the wiping head; When wiping, first move the wiping block to the top of one end of the coating surface of the product to be tested through the coordinated movement of the Y-axis driving module and the X-axis driving module, and then move the wiping block downward or the carrier upward to make the wiping cloth wrapped around the outside of the wiping head contact with the coating surface of the product to be tested; Next, the wiping block is driven by the sub-driving module to drive the wiping head and the wiping cloth outside it to move from one end of the coating surface of the product to be tested to the other end, so that the testing liquid soaked on the wiping cloth and the testing liquid formed into fine mist beads on the coating surface of the product to be tested are more evenly and comprehensively applied to the coating surface of the product to be tested, thereby improving the difference in the volatilization and dissipation state of the testing liquid in the intact coating area and the defective coating area on the coating surface, and improving the detection accuracy and the comprehensiveness of the detection of defects of various types and regions; After the test has been carried out for a period of time, the negative pressure collector can be turned on to collect and discharge the long-accumulated mist test liquid to prevent the water mist from condensing into liquid dripping and contaminating the machine and causing safety hazards.

[0035] When the above-mentioned automatic detection system for coating defects is used, the detection liquid is first and then continuously atomized and sprayed on the product to be detected and then wiped with a soaked cloth, so as to improve the uniformity and sufficiency of the distribution of the detection liquid on the surface of the product to be detected, thereby improving the consistency of the dissipation of the detection liquid on the surface of the product to be detected and the difference in the dissipation traces in the complete coating area and the defective coating area, thereby improving the detection accuracy and the comprehensiveness of the detection of defects of various types and regions; Furthermore, through the cooperation of one detection unit and two carriers, continuous monitoring of the product can be achieved, and the detection suspension caused by loading and unloading can be avoided, thereby improving the detection efficiency; and it is convenient to install the wiping cloth, and the tightness of the wiping cloth outside the wiping head can be controlled within a reasonable range during the mobile wiping process, which can avoid the wiping head pressure and compression of the wiping area due to the wiping cloth being too tight, and can also avoid the tangling disorder caused by the wiping cloth being too loose, the wiping cloth area wrapped around the outside of the wiping head being too large to affect the wiping liquid penetration effect, and the wiping cloth moving relative to the wiping head during the mobile wiping process and sticking to the product or stacking, resulting in abnormal wiping pressure and damage to the product. In addition, it can effectively avoid the risks of liquid overflowing from the spray valve and adverse interference to the product, and can also collect and discharge excess spray in a timely manner to prevent water mist from condensing into liquid drops after long-term accumulation and contaminating the machine and causing safety hazards.

[0036] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic detection system for coating defects, comprising: A carrier (200) and a detection unit (300) for loading a product (100) to be detected, characterized in that: it also comprises: a first X-direction drive module (400), a second X-direction drive module (500) and a Y-direction drive module (600) arranged at intervals, the carrier (200) being mounted on the movable part of each of the first X-direction drive module (400) and the second X-direction drive module (500), and the detection unit (300) being mounted on the movable part of the Y-direction drive module (600) being movable along the Y direction to a position above the carrier (200) on the first X-direction drive module (400) or above the carrier (200) on the second X-direction drive module (500); The detection unit (300) is mounted on the movable part of the Y-direction driving module (600) via a substrate (301), and comprises: a spray valve (13), a camera (11) for photographing the product (100) to be detected, a wiping block (1), a cloth placing module (61), and a cloth collecting module (62); the spray valve (13) and the wiping block (1) are arranged in sequence along the moving direction of the carrier (200) on the first X-direction driving module (400) and the second X-direction driving module (500); a light source (12) is arranged below the camera (11); the wiping block (1) ) is movably arranged below the light source (12), a wiping cloth (5) is wound around the cloth placing module (61), the wiping block (1) and the cloth collecting module (62), a wiping head (2) is arranged at the end of the wiping block (1) for contacting the product to be detected (100) through the wiping cloth (5), a plurality of liquid outlet holes (301) are opened on the wiping block (1), each of the liquid outlet holes (301) is connected to a liquid flow channel (4) arranged in the wiping block (1), and the liquid flow channel (4) and the spray valve (13) are each connected to the liquid supply unit through a pipeline.

2. The automatic detection system for coating defects according to claim 1, characterized in that: The area of ​​the wiping head (2) close to the wiping block (1) is provided with at least two liquid outlet hole groups (3) spaced apart in the direction of movement of the wiping cloth (5); each liquid outlet hole group (3) is composed of a plurality of liquid outlet holes (301) spaced apart in the width direction of the wiping cloth (5) and each of which is in contact with the wiping cloth (5); the liquid outlet holes (301) located in different liquid outlet hole groups (3) are staggered in the width direction of the wiping cloth (5); and the liquid outlet hole group (3) is located on a side of the wiping head (2) close to the cloth placing module (61) in the direction of movement of the wiping cloth (5).

3. The automatic detection system for coating defects according to claim 1 or 2, characterized in that: A first guide bar (191) and a second guide bar (192) are respectively arranged in the direction of movement of the wiping cloth (5) and between the cloth placing module (61) and the wiping head (2), and between the wiping head (2) and the cloth collecting module (62), so that the wiping cloth (5) is wound around the first guide bar (191) and the second guide bar (192). A first pressure bar (20) and a second pressure bar (21) are respectively arranged on the side of the wiping cloth (5) opposite to the first guide bar (191) and the second guide bar (192). The first pressure bar (20) and the second pressure bar (21) are respectively connected to the driving module (22) and can move in a direction close to or away from the first guide bar (191) and the second guide bar (192).

4. The automatic detection system for coating defects according to claim 1 or 2, characterized in that: The spray valve (13) is mounted on the base plate (301) via a fixing plate (24); the lower end of the spray valve (6) passes through a through hole (26) provided on the fixing plate (24), so that the nozzle (25) at the lower end of the spray valve (6) is located below the fixing plate (24); a protective cover (28) is mounted on the lower surface of the fixing plate (24) and outside the spray radiation area (27) of the nozzle (25); the protective cover (28) is provided with a collection cover (29) with an opening at the upper end on the side opposite to the camera (11); the collection cover (29) is connected to a negative pressure collector (30) via a pipeline.

5. The automatic detection system for coating defects according to claim 4, characterized in that: An outer protective cover (31) is installed on the surface of the protective cover (28) on the side opposite to the camera (2); in addition, a first notch (321) is provided on the side wall of the protective cover (31) facing the collecting cover (29); a second notch (322) is provided on the side wall of the protective cover (28) facing the first notch (321); and the upper end of the second notch (322) is higher than the upper end of the first notch (321).

6. The automatic detection system for coating defects according to claim 1, characterized in that: A first loading mechanism and a first unloading mechanism cooperating with the carrier (200) thereon are respectively provided at both ends of the first X-direction driving module (400).

7. The automatic detection system for coating defects according to claim 1 or 6, characterized in that: A second loading mechanism and a second unloading mechanism cooperating with the carrier (200) thereon are respectively provided at both ends of the second X-direction driving module (500).

8. The automatic detection system for coating defects according to claim 1, characterized in that: A sub-driving module (700) is installed on the substrate (301) and is located on the side of the camera (11) opposite to the spray valve (13). The movable part of the sub-driving module (700) is connected to a supporting vertical plate (7). The cloth placing module (61), the cloth collecting module (62) and a plurality of guide rollers (63) arranged between the cloth placing module (61) and the wiping head (2) and between the wiping head (2) and the cloth collecting module (62) are all installed on the supporting vertical plate (7).

9. The automatic detection system for coating defects according to claim 8, characterized in that: The wiping block (1) further comprises a horizontal plate (101) and a bent plate (102) located at the end of the horizontal plate (101); the wiping head (2) is arranged on the end of the bent plate (102) opposite to the horizontal plate (101); the end of the horizontal plate (101) opposite to the bent plate (102) is connected to a support plate (16); and the support plate (16) is connected to the support vertical plate (7) via a bracket (17).

10. The automatic detection system for coating defects according to claim 9, characterized in that: A guide shaft (23) mounted on the support plate (16) is provided below the horizontal plate (101) of the wiping block (1) opposite to the end of the bending plate (102).

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