Online AOI inspection methods, media and equipment for edge grinding

Abstract

This invention discloses an online AOI inspection method, medium, and equipment for edge grinding. The specific method is as follows: S100: A glass cutting device cuts glass to a set size; S200: A dimensional defect detection device inspects the cut glass. If a surface defect is detected, the grinding amount and polishing amount of the edge grinding device are adjusted according to the defect type; S300: The edge grinding device performs an edge grinding operation on the glass; S400: The AOI inspection device detects the grinding amount and polishing amount of the edge-ground glass. If a polishing defect is detected, the grinding device adjusts the polishing based on the defect feedback; S500: The adjusted edge grinding device performs edge grinding on newly entered glass. After edge grinding, the glass enters the AOI inspection device for re-judgment. This method enables the inspection of cut products and allows online adjustment of the grinding amount and polishing amount of the edge grinding device based on detected cutting defects, thereby maximizing the compensation for cutting defects.

Description

Technical Field

[0001] This invention relates to the field of glass edge inspection, and particularly to online edge AOI inspection methods, media, and equipment. Background Technology

[0002] The LCD & OLED manufacturing process involves the following steps: glass cutting, first inspection, edge grinding and chamfering, and second inspection. The edge grinding and chamfering machine is used to grind the four sides of the product at an angle, grind the sides vertically, and grind the four corners to create rounded or chamfered edges. These processes eliminate stress on the glass after cutting, remove defects, ensure the stability of the LCD & OLED products, and prepare them for the next process. Currently, if many products fail the testing, the only option is to stop the machine and manually debug, rather than debugging online, which wastes the testing process. Summary of the Invention

[0003] The technical problem solved by this invention is to provide an online AOI inspection method for edge grinding, which can realize online debugging and feedback of detected defects, thereby improving the accuracy of the edge grinding mechanism.

[0004] The technical solution adopted by this invention to solve its technical problem is: an online AOI inspection method for edge grinding, comprising a glass cutting device, a dimensional defect detection device, an edge grinding device, and an AOI grinding inspection device arranged sequentially, the specific method being: S100: Glass cutting equipment cuts glass to a set size; S200: The size defect detection equipment performs size and defect detection on the cut glass. If no defect is detected, no operation is performed. If a defect is detected on the glass surface, the detected defect type is fed back to the edge grinding equipment, and the grinding amount and polishing amount of the edge grinding equipment are adjusted according to the defect type. S300: The edging equipment performs edging operations on the glass; S400: The AOI inspection equipment detects the amount of grinding and polishing on the glass after edge grinding. If the glass passes the inspection, no operation is performed. If a polishing defect is detected in the glass, the defect is fed back to the edge grinding equipment, and the grinding equipment adjusts the grinding according to the defect feedback. S500: The adjusted edging equipment edges newly entered glass. After edging is completed, the glass enters the AOI inspection equipment for re-judgment. If the glass still has grinding defects, the edging equipment is adjusted again.

[0005] Furthermore, in step S200, when the detected glass end face defect is a shell defect, the grinding amount of the R angle or C angle required for grinding the glass edge is increased according to the detected defect size data, so that the edge grinding equipment can peel off the shell defect on the glass.

[0006] Furthermore, in step S200, when the detected glass edge defect is a crack defect, the grinding depth of the grinding machine is increased according to the distance from the detected crack to the glass edge, so that the grinding machine can grind away the crack in the glass.

[0007] Furthermore, in step S200, when the detected glass edge defect is a corner defect, the grinding depth of the grinding machine is increased according to the detected corner distance, so that the grinding machine can grind the corner of the glass flat.

[0008] Furthermore, in step S200, the grinding amount and polishing amount of the edging equipment are adjusted according to the defect type. If the size of the glass after edging exceeds the set tolerance size after the edging equipment increases the grinding amount and polishing amount, the size defect detection equipment will issue an alarm and remove the glass as a defective product.

[0009] Furthermore, in step S400, when the grinding amount is too large, the currently ground size is compared with the original size through visual inspection to obtain the excessive grinding size, which is fed back to the edge grinding equipment in the previous station to reduce the grinding depth of the edge grinding equipment. The reduced grinding depth is the excessive grinding size.

[0010] Furthermore, in step S400, when the grinding amount is too small, the newly ground size is compared with the original size through visual inspection to obtain the missing grinding size. This is then fed back to the edge grinding equipment in the previous station to increase the grinding depth of the edge grinding equipment. The increased grinding depth is the missing grinding size.

[0011] Furthermore, in step S400, when there is a deviation in the grinding amount of the R-angle or C-angle on the upper and lower sides of the glass, the AOI grinding detection equipment detects the grinding depth on the upper and lower sides of the glass, obtains the grinding depth deviation value, and feeds the grinding depth deviation value back to the edge grinding equipment of the previous station, adjusts the glass height during grinding, and the adjusted height value is half of the grinding depth deviation value.

[0012] The present invention also discloses a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the online edge grinding AOI detection method described above.

[0013] The present invention also discloses a computer device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; wherein: The memory is used to store computer programs; The processor is used to execute the steps of the online edge grinding AOI inspection method described above by running the program stored in the memory.

[0014] The beneficial effects of this invention are: 1. This method can inspect the cut product and adjust the grinding and polishing amount of the edge grinding equipment online according to the detected cutting defects, thereby compensating for the cutting defects to the greatest extent.

[0015] 2. This method can inspect the ground glass products using AOI grinding inspection equipment, and adjust the grinding amount and grinding volume of the edge grinding equipment online according to the detected defects, thereby ensuring the accuracy of subsequent product grinding.

[0016] 3. This method can adjust the height of the product during edge grinding in the edge grinding equipment according to the difference between the grinding data on the upper and lower sides, so as to ensure the consistency of grinding on the upper and lower sides when performing chamfering operation later. Attached Figure Description

[0017] Figure 1 This is a schematic flowchart of the linear edge grinding AOI inspection method according to an embodiment of this application.

[0018] Figure 2 This is a grinding schematic diagram of the linear edge grinding AOI inspection method according to an embodiment of this application (the chamfer is an R angle).

[0019] Figure 3 This is a grinding schematic diagram of the linear edge grinding AOI inspection method according to an embodiment of this application (the chamfer is C-angle).

[0020] Figure 4 This is a schematic diagram of the AOI grinding inspection equipment according to an embodiment of this application.

[0021] Figure 5 This is a schematic diagram of a shell defect according to an embodiment of this application. Detailed Implementation

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] like Figure 1As shown, an embodiment of this application discloses an online AOI (Automated Optical Inspection) method for edge grinding, comprising a glass cutting device, a dimensional defect detection device, an edge grinding device, and an AOI grinding inspection device arranged sequentially. The specific method is as follows: S100: Glass cutting equipment cuts glass to a set grinding size; S200: The size defect detection equipment performs size and defect detection on the cut glass. If no defect is detected, no operation is performed. If a defect is detected on the glass surface, the detected defect type is fed back to the edge grinding equipment, and the grinding amount and polishing amount of the edge grinding equipment are adjusted according to the defect type. S300: The edging equipment performs edging operations on the glass; S400: The AOI inspection equipment detects the amount of grinding and polishing on the glass after edge grinding. If the glass passes the inspection, no operation is performed. If a polishing defect is detected in the glass, the defect is fed back to the edge grinding equipment, and the grinding equipment adjusts the grinding according to the defect feedback. S500: The adjusted edging equipment edges newly entered glass. After edging is completed, the glass enters the AOI inspection equipment for re-judgment. If the glass still has grinding defects, the edging equipment is adjusted again.

[0024] Specifically, the equipment in this application is all existing equipment, and the specific equipment structure can be referred to in patent 202210586024, a glass edging and beveling machine with automatic detection.

[0025] Specifically, it should be explained that the grinding amount mentioned above refers to the dimension of grinding the four sides of the glass, and the grinding amount refers to the grinding dimension of grinding the upper and lower sides of the glass edge into R angle or C angle. Under normal circumstances, the depth of grinding the upper and lower sides of the glass edge into R angle or C angle should be consistent. The edge grinding equipment includes an upper edge grinding knife and a lower edge grinding knife. If the glass is not in the exact middle of the upper edge grinding knife and the lower edge grinding knife when grinding the chamfer, it will cause the upper and lower chamfer grinding to be inconsistent, which will lead to grinding error.

[0026] Specifically, in actual operation, it is set that after inspecting N pieces of glass, if all N pieces of glass have the same defect, the edge grinding machine will be adjusted online. N can be 10, 50, 100, etc. This setting can prevent the edge grinding machine from being incorrectly adjusted due to a single defect in a single piece of glass. If all N pieces of glass have the same defect, it means that the edge grinding equipment must have made an error. Therefore, adjusting the edge grinding equipment online can prevent the same defect from appearing again in subsequent glass products.

[0027] This method enables the inspection of cut products and the online adjustment of the grinding and polishing amounts of the edging equipment based on detected cutting defects, thereby maximizing the compensation for cutting defects. Simultaneously, this method utilizes AOI (Automated Optical Inspection) grinding equipment to inspect the ground glass products and adjust the grinding and polishing amounts of the edging equipment online based on detected defects, ensuring the accuracy of subsequent product grinding. Furthermore, this method includes a re-inspection step, allowing for the re-inspection of newly edged glass using the adjusted grinding equipment to verify the accuracy of the edging machine's adjustment. If the adjustment is inaccurate, fine-tuning can be performed.

[0028] In this embodiment, in step S200, when the detected glass end face defect is a shell defect, the grinding amount of the R angle or C angle required for grinding the glass edge is increased according to the detected defect size data, so that the edge grinding equipment can peel off the shell defect on the glass.

[0029] Specifically, when detecting defects, the glass product is photographed and inspected using a size defect detection device to obtain product images and defect size data of the shell defects. The machine vision algorithm used is an existing and practical algorithm, and no improvements have been made to it here, so it will not be described in detail.

[0030] Specifically, such as Figure 5 As shown, a shell defect refers to a raised, shell-like shape on the glass end face. This defect can be removed by grinding. Specifically, based on the location of the shell defect obtained from the above algorithm, the grinding distance of the edge grinding equipment is increased so that the shell defect is removed during the next grinding process, thereby ensuring product quality.

[0031] In this embodiment, in step S200, when the detected glass edge defect is a crack defect, the grinding depth of the grinding machine is increased according to the distance from the detected crack to the glass edge, so that the grinding machine can grind away the crack in the glass.

[0032] Specifically, the glass product is photographed and inspected using a dimensional defect detection device to determine the location of the crack, i.e., the distance from the crack to the glass edge. For example, if the distance from the crack to the glass edge is 0.7mm, and the set grinding amount is 0.6mm, then the grinding amount of the next step edge grinding machine can be modified online to 0.7mm. It must be ensured that the 0.7mm grinding amount is within the product's grinding tolerance range. Then, when the subsequent edge grinding operation is performed, the crack location can be ground off, thereby ensuring product quality.

[0033] In this embodiment, in step S200, when the detected glass edge defect is a corner defect, the grinding depth of the grinding machine is increased according to the detected corner distance, so that the grinding machine can grind the corner of the glass flat.

[0034] Specifically, the glass product is photographed and inspected using a dimensional defect detection device to identify the location of the missing corner. At this point, the grinding distance of the edge grinding equipment is increased so that the missing corner is ground off during the next grinding process, thereby ensuring the quality of the product.

[0035] In this embodiment, in step S200, the grinding amount and polishing amount of the edging equipment are adjusted according to the defect type. If the size of the glass after edging exceeds the set tolerance size after the edging equipment increases the grinding amount and polishing amount, the size defect detection equipment will issue an alarm and remove the glass as a defective product.

[0036] Specifically, when adjusting the grinding and polishing amounts of the edging equipment, the first priority is to ensure that, after adjustment, the edged glass product remains within the tolerance range, thus guaranteeing the yield rate of the edged product. If the edging equipment adjustment causes the edged glass product to exceed its tolerance range, it means that even if the defects in the glass product are removed, it will become a defective product. Therefore, when it is detected that the edged product exceeds its tolerance range, it means that the product cannot be repaired and must be labeled as a defective product for rejection. This setting can maximize the yield rate of the product.

[0037] In this embodiment, in step S400, when the grinding amount is too large, the size of the currently ground material is compared with the original size through visual inspection to obtain the excessive grinding size, which is fed back to the edge grinding equipment of the previous station to reduce the grinding depth of the edge grinding equipment. The reduced grinding depth is the excessive grinding size. In step S400, when the grinding amount is too small, the newly ground size is compared with the original size through visual inspection to obtain the missing grinding size. This is then fed back to the edge grinding equipment in the previous station to increase the grinding depth of the edge grinding equipment. The increased grinding depth is the missing grinding size.

[0038] Specifically, the AOI visual inspection principle is as follows: Mark detection points are set on the glass product. In step S200, the distance from the mark point to the outermost edge is detected and recorded as A. This is the original size of the product. After the grinding operation, the AOI grinding inspection equipment detects the distance from the mark point to the outermost edge, which is recorded as B. The grinding amount at this time is C, where C=AB. At this time, it is determined whether B is within the qualified range according to the preset value. If B is not within the range, it means that the grinding amount is too large. The grinding distance of the edge grinding equipment is adjusted. The grinding amount C is adjusted according to the difference between the set value and B, so that the subsequent edge grinding operation of the glass is within the specified range.

[0039] In this embodiment, in step S400, when there is a deviation in the grinding amount of the R-angle or C-angle on the upper and lower sides of the glass, the AOI grinding detection equipment detects the grinding depth on the upper and lower sides of the glass, obtains the grinding depth deviation value, and feeds the grinding depth deviation value back to the edge grinding equipment of the previous station, adjusts the glass height during grinding, and the adjusted height value is half of the grinding depth deviation value.

[0040] Specifically, during AOI visual inspection, the upper and lower inspection cameras in the AOI grinding inspection equipment inspect the upper and lower sides of the glass, respectively. When inspecting the R-corner or C-corner, since the R-corner or C-corner has a certain grinding depth, the inspection camera will output a black edge when taking pictures. Different grinding depths will result in different color depths of the output black edge. The conversion algorithm in the inspection camera can convert the color into grinding depth, and then compare the grinding depth data on both sides. If the data are the same, it means that the product is qualified. If the data are different, it means that the grinding position height has deviated. At this time, the height of the product during edge grinding in the edge grinding equipment is adjusted according to the difference between the upper and lower grinding data, so that the consistency of grinding on the upper and lower sides can be guaranteed when performing chamfering operations later.

[0041] The present invention also discloses a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the online edge grinding AOI detection method described above.

[0042] Furthermore, the computer-readable storage medium in this embodiment can be any combination of one or more readable storage media, wherein the readable storage medium includes an electrical, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof.

[0043] The present invention also discloses a computer device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; wherein: The memory is used to store computer programs; The processor is used to execute the steps of the online edge grinding AOI inspection method described above by running the program stored in the memory.

[0044] As one embodiment of the present invention, the communication bus mentioned in the terminal above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into an address bus, a data bus, a control bus, etc.

[0045] As one embodiment of the present invention, the communication interface is used for communication between the aforementioned terminal and other devices.

[0046] In one embodiment of the present invention, the memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0047] As one embodiment of the present invention, the processor described above may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0048] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An online AOI (Automated Optical Inspection) method for edge grinding, comprising a glass cutting device, a dimensional defect detection device, an edge grinding device, and an AOI grinding inspection device arranged sequentially, characterized in that, The specific method is as follows: S100: Glass cutting equipment cuts glass to a set size; S200: The size defect detection equipment performs size and defect detection on the cut glass. If no defect is detected, no operation is performed. If a defect is detected on the glass surface, the detected defect type is fed back to the edge grinding equipment, and the grinding amount and polishing amount of the edge grinding equipment are adjusted according to the defect type. S300: The edging equipment performs edging operations on the glass; S400: The AOI inspection equipment detects the amount of grinding and polishing on the glass after edge grinding. If the glass passes the inspection, no operation is performed. If a polishing defect is detected in the glass, the defect is fed back to the edge grinding equipment, and the grinding equipment adjusts the grinding according to the defect feedback. S500: The adjusted edging equipment edges newly entered glass. After edging, the glass enters the AOI inspection equipment for re-judgment. If the glass still has grinding defects, the edging equipment is adjusted again. In step S200, the grinding amount and polishing amount of the edging equipment are adjusted according to the defect type. If the edging equipment increases the grinding amount and polishing amount, and the dimension of the glass after edging exceeds the set tolerance dimension of the glass, the dimension defect detection equipment issues an alarm and removes the glass as a defective product. In step S400, when the grinding amount is too large, the dimension of the newly ground glass is compared with the original dimension through visual inspection to obtain the excessive grinding dimension, which is fed back to the edging equipment of the previous station to reduce the grinding amount. The grinding depth of the edge grinding equipment is reduced, and the reduced grinding depth is the grinding excess dimension. In step S400, when the grinding amount is too small, the currently ground dimension is compared with the original dimension through visual inspection to obtain the grinding missing dimension. This is fed back to the edge grinding equipment in the previous station to increase the grinding depth of the edge grinding equipment. The increased grinding depth is the grinding missing dimension. In step S400, when there is a deviation in the grinding amount of the R-angle or C-angle on the upper and lower sides of the glass, the AOI grinding inspection equipment detects the grinding depth on the upper and lower sides of the glass, obtains the grinding depth deviation value, and feeds back the grinding depth deviation value to the edge grinding equipment in the previous station to adjust the glass height during grinding. The adjusted height value is half of the grinding depth deviation value.

2. The online edge grinding AOI inspection method as described in claim 1, characterized in that: In step S200, when the detected glass end face defect is a shell defect, the grinding amount of the R angle or C angle required for grinding the glass edge is increased according to the detected defect size data, so that the edge grinding equipment can peel off the shell defect on the glass.

3. The online edge grinding AOI inspection method as described in claim 1, characterized in that: In step S200, when the detected glass edge defect is a crack defect, the grinding depth of the grinding machine is increased according to the distance from the detected crack to the glass edge, so that the grinding machine can grind away the crack in the glass.

4. The online edge grinding AOI inspection method as described in claim 1, characterized in that: In step S200, when the detected glass edge defect is a corner defect, the grinding depth of the grinding machine is increased according to the detected corner distance, so that the grinding machine can grind the corner of the glass flat.

5. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the online edge grinding AOI detection method according to any one of claims 1 to 4.

6. A computer device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; wherein: The memory is used to store computer programs; The processor is configured to execute the steps of the online edge grinding AOI inspection method according to any one of claims 1 to 4 by running the program stored in the memory.

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