A circuit board inspection system and inspection process

Abstract

The present invention discloses a circuit board inspection system and an inspection process. The inspection system includes a rack, a distribution line arranged on the top of the rack, a return line arranged on the rack and spaced below the distribution line, a distribution drive motor for driving the distribution line, a return drive motor for driving the return line, a plurality of light tables arranged on both sides of the rack and spaced along the length of the rack, and a central control computer arranged at the front end of the rack and equipped with a speaker and a display screen. The present invention provides a distribution line and a return line spaced above and below, wherein the distribution line is used to transmit products to be inspected or qualified products, and the return line is used to return defective products, thereby ensuring the normal transmission of qualified products and the return of defective products. Light tables distributed according to the inspection process are arranged on both sides of the double-layer assembly line, and the light tables are connected to the central control computer so that each workstation can communicate with the central control computer. The material distributor can supply materials to each workstation in a timely manner according to the current status of the workstation number on the central control computer display screen.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board quality inspection, and in particular to a circuit board inspection system and inspection method. Background Art

[0002] Flexible printed circuit boards, also known as flexible boards, are manufactured by transferring and etching a conductive circuit pattern onto a flexible substrate using a photoimageable pattern transfer and etching process. Double-sided and multi-layer boards achieve electrical connectivity between the surface and inner layers through metallized vias, and the circuit pattern surface is insulated. After production, flexible circuit boards must be inspected for conformity, analyzing defective locations and conditions. Inspection of flexible circuit boards involves multiple steps, including microscopic / specialized inspection, process quality control (MQC), finished product quality control (FQC), factory inspection (OQC), and packaging and shipment. However, not all flexible circuit boards require every test; inspections are performed based on specific order requirements.

[0003] Traditional flexible PCB inspection typically involves setting up multiple inspection areas corresponding to different inspection processes. For example, a fixed microscopic inspection station is set up in the microscopic inspection area, several quality inspection stations are set up in the process quality inspection area, and multiple factory inspection stations are set up in the finished product factory sampling inspection area. Each employee performs their respective duties in their respective positions. After microscopic inspection, the flexible PCBs are sorted into good and bad grades. For example, if all PCB units in a board are qualified, or if one, two, three, four, five or more defective PCBs are packed into different boxes, the defective units with different numbers of units are assigned to different handlers according to the specific requirements of the order. Good products and those that meet the required number of defective units are sent to the process quality inspection area. The staff in the process quality inspection area re-inspect the products and classify them into good and bad products. Bad products are returned to the microscopic inspection area or the defective product recycling area. Good products are sent to the finished product quality inspection area for full inspection. Failed products are returned. Good products are transferred to the finished product factory sampling inspection area for random inspection. Only those that pass the inspection are packaged and shipped. During the entire inspection process, products are transferred manually, which not only consumes workers' time and energy and reduces inspection efficiency, but also makes it easy for collisions or shaking to cause new defects in the circuit boards during transportation. The low degree of automation also requires improvement. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a circuit board inspection system that can improve work efficiency, reduce labor intensity, and increase the degree of automation.

[0005] In order to achieve the above object, the solution of the present invention is:

[0006] A circuit board inspection system includes a rack, a distribution line arranged on the top of the rack, a return line arranged on the rack and spaced below the distribution line, a distribution drive motor for driving the distribution line, a return drive motor for driving the return line, a plurality of light tables arranged on both sides of the rack and spaced along the length of the rack, and a central control computer arranged at the front end of the rack with a speaker and a display screen. The transmission direction of the distribution line is opposite to that of the return line. The distribution line includes a mirror inspection area arranged in sequence from the beginning of the line to the end of the line. The process quality inspection area, the finished product sampling inspection area, the counting and periodic area and the scanning and entry packaging area. The reflow assembly line is located below the microscopic inspection area, the process quality inspection area and the finished product sampling inspection area of the distribution assembly line. The optical platform includes at least one microscopic inspection station corresponding to the microscopic inspection area, at least one process quality inspection station corresponding to the finished product area, at least one sampling inspection station corresponding to the finished product sampling inspection area, at least one counting and periodic station corresponding to the counting and periodic area and at least one scanning and entry packaging station corresponding to the scanning and entry packaging area. Each optical platform is provided with an independent station number and is connected to the central control computer.

[0007] Furthermore, the distribution assembly line includes a first conveyor belt, a conveyor roller and a second conveyor belt. The first conveyor belt is arranged in the mirror inspection area and the process quality inspection area, the conveyor roller is arranged in the finished product sampling area, and the second conveyor belt is arranged in the counting and periodicity area and the scanning and entry packaging area; the distribution drive motor includes a first motor and a second motor. The first motor is arranged at the head of the distribution assembly line, and the second motor is arranged at the end of the distribution assembly line. The first motor is connected to the first conveyor belt through the first conveyor chain, and the second motor is connected to the second conveyor belt through the second conveyor chain. The conveyor roller is an unpowered roller, and the return drive motor is connected to the return assembly line through the return conveyor chain.

[0008] Furthermore, the first motor, the second motor and the reflux drive motor are respectively connected to a frequency converter.

[0009] Furthermore, the frame is provided with a motor installation cabinet at the bottom of the line head and the line tail of the distribution line respectively. The first motor and the reflux drive motor are arranged in the motor installation cabinet at the line head of the distribution line, and the second motor is arranged in the motor installation cabinet at the line tail of the distribution line.

[0010] Furthermore, a block is set between the finished product sampling area and the counting and periodic area of the distribution line, a block is set between the counting and periodic area and the scanning and entry packaging area, a block is set at the end of the second conveyor belt, and a block is also set at the end of the return line.

[0011] Furthermore, ribs are installed on both sides of the first conveyor belt and the second conveyor belt of the distribution line and the return line.

[0012] Furthermore, the rack is equipped with a socket panel and aviation connector corresponding to each optical platform. The signal line of each optical platform is connected to the rack signal line using an aviation connector and connected to the central control computer.

[0013] Furthermore, each light platform is equipped with an alarm and an intelligent pager connected to the central control computer. The intelligent pager includes a waiting material button, a quality abnormality button, a lack of material button, an emergency material shortage button and a pager.

[0014] The present invention also discloses an inspection process using the circuit board inspection system, which includes the following steps:

[0015] Step 1: Determine whether the product requires microscopic inspection / specialized inspection based on the process sheet or customer requirements. Each light table controls the intelligent pager according to the current status of the workstation number, indicating waiting for material collection, quality abnormality, lack of material, or urgent material shortage, so that the current status of each workstation number is displayed on the display screen of the central control computer. If microscopic inspection / specialized inspection is required, proceed to step 2; if microscopic inspection / specialized inspection is not required, proceed to step 3.

[0016] Step 2: The delivery person places the ingredient turnover basket horizontally, and the central control computer sends a voice reminder to the inspector at the microscopic inspection station to pick up the materials from the distribution line. If the inspector at the microscopic inspection station is about to wait for materials or waiting for materials, he or she can also actively call the ingredients through the smart pager; after the microscopic inspection / special inspection completes the product inspection, it is placed vertically in the turnover basket at the end of the return line. The ingredient distributor receives the product. If the horizontally placed product is received, it is determined whether it is a return product inspected by the finished product factory inspector in the finished product sampling area and not accepted by the corresponding station or the finished product factory inspector returned the uninspected product. If it is a return product, it is directly distributed to the corresponding station personnel. If it is an uninspected product, jump to step 3;

[0017] Step 3: The delivery person places the product horizontally on the distribution conveyor according to the lighting status of the process quality inspection station on the central control computer screen, and reminds the corresponding finished product quality inspector or process quality inspector to collect the materials by voice. The finished product quality inspector or process quality inspector can also actively press the smart pager to call for materials when the finished product quality inspector or process quality inspector is about to receive materials or is waiting for materials. The finished product quality inspector or process quality inspector only needs to take the horizontal turnover box on the distribution line to take the materials;

[0018] Step 4: After the finished product quality inspector and the process quality inspector complete their work, they sign and write their workstation number, and then place the product vertically on the distribution line in the turnover box and flow it to the finished product sampling inspection area;

[0019] Step 5: Random inspection by the inspector: If the inspection is qualified, the product will be placed on the distribution line and flowed to the counting and periodic workstation; if the inspection is unqualified, the inspector will remind the corresponding inspection station by pressing the smart pager, and place the returned products horizontally on the reflow line, and the products will flow to the corresponding workstation; if the products are horizontally placed, they can be placed horizontally on the reflow line to continue reflowing. In the middle, they can be picked up by the finished product inspector or the process inspector, or the thread ends flowing to the reflow line can be fed to the material dispenser;

[0020] Step 6: Count and divide the cycle: If OK, place the product on the second conveyor belt of the distribution line and flow it to the scanning, recording and packaging station; if NG, transfer it to the relevant processor for processing;

[0021] Step 7: Scan and enter the packaging, and place the packaged product in the corresponding area at the back.

[0022] After adopting the above scheme, the circuit board inspection system of the present invention sets up a distribution line and a reflow line with upper and lower intervals. The distribution line is used to transmit products to be inspected or qualified products, and the reflow line is used to reflow defective products. This can ensure the normal transmission of qualified products and the reflow of defective products. Light tables are set on both sides of the double-layer assembly line according to the distribution of inspection processes. The light tables are connected to the central control computer so that each workstation can communicate with the central control computer. The material distributor can supply materials to each workstation in time according to the current status of the workstation number on the central control computer display screen. Through the setting of the double-layer assembly line, each inspection link is effectively connected together, the inspection efficiency of different inspection processes is improved, the labor intensity of employees is reduced, and secondary damage to the product is avoided. In addition, the distribution line and the reflow line are set on the same rack with upper and lower intervals, which can save installation space and facilitate employee operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic top view of the present invention.

[0024] Figure 2 It is a schematic three-dimensional diagram of the local structure of the present invention.

[0025] Figure 3 It is a structural schematic diagram of the optical platform of the present invention.

[0026] Figure 4 The figure is a schematic diagram showing the working status of the display screen of the central control computer of the present invention.

[0027] Figure 5 This is a schematic diagram of the working status of the sampling inspection station display of the present invention.

[0028] Figure 6 It is a schematic diagram of the process of microscopic examination and / or special examination of the present invention.

[0029] Figure 7 Schematic diagram of the process quality inspection process of the present invention.

[0030] Figure 8 Schematic diagram of the process of quality inspection of finished products of the present invention. DETAILED DESCRIPTION

[0031] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "X", "Y", "Z", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0034] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0037] like Figures 1 to 5 As shown, the present invention discloses a circuit board inspection system, which includes a rack 1, a distribution line 2 arranged on the top of the rack, a reflow line 3 arranged on the rack 1 and spaced below the distribution line 2, a distribution drive motor 41 / 42 driving the distribution line 2, a reflow drive motor 5 driving the reflow line 3, a plurality of light tables 6 arranged on both sides of the rack 1 and spaced along the length direction of the rack 1, and a central control computer 7 arranged at the front end of the rack 1 and equipped with a speaker and a display screen. The transmission direction of the distribution line 2 is opposite to that of the return line 3. The distribution line 2 includes a mirror inspection area 21, a process quality inspection area 22, a finished product sampling area 23, a counting and periodic area 24 and a scanning and entry packaging area 25, which are arranged in sequence from the line head A to the line tail Z. The return line 3 is correspondingly located below the mirror inspection area 21, the process quality inspection area 22 and the finished product sampling area 23. The light table 6 is provided with multiple mirror inspection stations 61, multiple process quality inspection stations 62, multiple sampling stations 63, multiple counting and periodic areas 64 and multiple scanning and entry packaging stations 65 corresponding to the mirror inspection area 21, the process quality inspection area 22, the finished product sampling area 23, the counting and periodic area 24 and the scanning and entry packaging area 25 of the distribution line 2 from the line head A to the line tail Z. Each light table 6 is provided with an independent station number 6A and is connected to the central control computer 7.

[0038] The distribution line 2 includes a first conveyor belt 2A, a conveyor roller 2B and a second conveyor belt 2C. The first conveyor belt 2A is arranged in the mirror inspection area 21 and the process quality inspection area 22, the conveyor roller 2B is arranged in the finished product sampling area 23, and the second conveyor belt 2C is arranged in the counting and periodicity area 24 and the scanning and recording packaging area 25; the distribution drive motor includes a first motor 41 and a second motor 42. The first motor 41 is arranged on the motor mounting cabinet 8 on the side of the line head A of the distribution line 2 and is located below the return line 3. The motor mounting cabinet is arranged on the frame 1, and the second motor 42 is arranged on the motor mounting cabinet on the side of the line tail Z of the distribution line 2. The first motor 41 and the second motor 42 are respectively connected to a frequency converter. The first motor 41 is connected to the first conveyor belt 2A through the first conveyor chain 43, and the second motor 42 is connected to the second conveyor belt 2C through the second conveyor chain 44. The output torque of the first motor 41 and the second motor 42 can be adjusted by the frequency converter to control the transmission speed of the first conveyor belt 2A and the second conveyor belt 2C.

[0039] The conveyor roller 2B is an unpowered roller. After the product is transferred from the first conveyor belt 21 to the conveyor roller 2B, the product will not move down automatically, but needs to be manually moved. Only qualified products will be transferred to the second conveyor belt 2B, and unqualified products will be returned to the hands of the inspector in front from the return line 3 at the bottom of the distribution line 2. The conveyor roller 2B is the buffer section of the distribution line 2. The conveyor roller 2B has good weight bearing capacity and is not easy to wear. It can be used as the connecting section of the first conveyor belt 2A and the second conveyor belt 2B.

[0040] A block is placed between the finished product sampling area 23 and the counting and categorizing area 24 to hold finished products after Final Quality Control (FQC) and Process Quality Control (MQC). A block is placed between the counting and categorizing area 24 and the scanning, logging, and packaging area 25 to hold products that have undergone Outgoing Quality Control (OQC) but have not yet been counted. A block is placed at the end of the second conveyor belt 2C to prevent products from falling. Counting and categorizing is used to classify qualified products. Products are printed with the customer's cycle code, some by day, some by week. This code is scanned into the computer for confirmation, and the product quantity is counted. After the count is completed, the product is transferred to the next process for packaging.

[0041] The tail B of the reflux assembly line 3 is flush with the head A of the distribution assembly line 2. The reflux drive motor 5 is arranged on one side of the tail B of the reflux assembly line 3 and is arranged in the same motor installation cabinet as the first motor 41. The reflux drive motor 5 is also connected to a frequency converter. The reflux drive motor 5 is connected to the drive shaft of the reflux assembly line 3 through a reflux transmission chain 51. The frequency converter connected to the reflux drive motor 5 is used to adjust the torque of the reflux drive motor 5, thereby controlling the transmission speed of the reflux assembly line 3.

[0042] The height from the bottom of the rack 1 to the distribution line 3 can be set to 600-1000mm, preferably 800mm. The spacing between the distribution line 2 and the return line 3 is 200-500mm, preferably 300mm. The height of the lines is limited to facilitate employees to pick up and place products on the distribution line 2. The height of the return line 3 is within a reasonable operating range to avoid the line being too high or too low and affecting the user experience. The first drive motor 4, the first inverter, the second drive motor 5, and the second inverter are installed on the motor mounting cabinet to form a protective mechanism to ensure safe use.

[0043] Both distribution line 2 and return line 3 are equipped with side guards to prevent people from reaching into the conveyor belts. Stoppers are installed at the end Z of distribution line 2 (the end of the second conveyor belt 2C) and the beginning Y of return line 3 to prevent products from falling after reaching the end Z and B.

[0044] The rack 1 is equipped with a socket panel 11 and an aviation connector 12 corresponding to each optical platform 6. The signal line of each optical platform 6 is connected to the signal line of the rack 1 using an aviation connector and connected to the central control computer. The rack 1 is equipped with a wire trough, and the signal line and power line are installed in the wire trough. Figure 4 As shown, each light table 6 is provided with an alarm 66 and an intelligent pager 67 connected to the central control computer. The intelligent pager 67 includes a waiting material button, a quality abnormality button, a lack of material button, and an emergency lack of material button. The waiting material button is a green light, the lack of material button is a yellow light, and the quality abnormality button and the emergency lack of material button are red lights.

[0045] like Figures 6 to 8 As shown, the working process of the present invention is as follows:

[0046] Step 1: The batcher arranges the products of each line according to the plan, and determines whether the products need microscopic inspection / special inspection according to the process sheet or customer requirements. Each optical table 6 controls the intelligent pager according to the status of the current work station number to indicate waiting for material collection, quality abnormality, lack of materials or urgent lack of materials, so that the current status of each work station number is displayed on the display screen of the central control computer; if microscopic inspection / special inspection is required, proceed to step 2, and if microscopic inspection / special inspection is not required, proceed to step 3;

[0047] Step 2: The delivery person places the ingredient turnover basket horizontally, and the central control computer sends a voice reminder to the inspector at the microscopic inspection station to take the materials from the distribution assembly line 2. If the inspector at the microscopic inspection station is about to wait for materials or waiting for materials, he can also actively call the ingredients through the intelligent pager; after the microscopic inspection / special inspection completes the product inspection, it is placed vertically in the turnover box on the return assembly line 3 and flows to the end B of the return assembly line. The ingredient worker receives the product. If the horizontally placed product is received, it is determined whether it is a returned product after inspection by the finished product factory inspector in the finished product sampling area 23 and not accepted by the corresponding station or the finished product factory inspector returned the uninspected product. If it is a returned product, it is directly distributed to the corresponding station personnel. If it is an uninspected product, jump to step 3;

[0048] Step 3: The delivery person places the product horizontally onto the distribution conveyor belt 2 according to the light status of the process quality inspection station 62 on the central control computer screen, and reminds the corresponding finished product quality inspector (FQC) or process quality inspector (MQC) to collect the materials through voice. The finished product quality inspector (FQC) or process quality inspector (MQC) can also actively press the smart call button to call for materials when the finished product inspector (FQC) or process quality inspector (MQC) is about to receive materials or is waiting for materials. When taking materials, the finished product inspector (FQC) or process quality inspector (MQC) only takes the horizontal turnover frame on the distribution line (vertical placement refers to the inspected products transferred from the previous station);

[0049] Step 4: After the finished product quality inspector (FQC) and the process quality inspector (MQC) complete their work, they sign and write their workstation number. The products are then placed vertically in the turnover box on the distribution line 2 and flowed to the finished product sampling area 23.

[0050] Step 5: Random Inspection by an OQC (Operating Quality Control) Officer: If the product passes the inspection, it is placed on the distribution line 2 and transferred to the counting and cycle workstation. If the product fails the inspection, the OQC officer uses the smart call button to alert the corresponding inspection station and places the returned product horizontally on the return line 3, where it is transferred to the corresponding workstation. If the product is placed horizontally, it can be placed horizontally on the return line and continue to flow back. It can be collected by a Finished Quality Control Officer (FQC) or a Process Quality Control Officer (MQC), or the thread ends Y that flow to the return line can be fed back to the material dispenser.

[0051] Step 6: Count and divide the cycle: If OK, place the product on the second conveyor belt of the distribution line and flow it to the scanning, recording and packaging station; if NG, transfer it to the relevant processor for processing;

[0052] Step 7: Scan and enter the packaging, and place the packaged product in the corresponding area at the back.

[0053] The above embodiments and illustrations do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. An inspection process of a circuit board inspection system, characterized in that: The circuit board inspection system includes a rack, a distribution line arranged on the top of the rack, a reflow line arranged on the rack and spaced below the distribution line, a distribution drive motor for driving the distribution line, a reflow drive motor for driving the reflow line, a plurality of light tables arranged on both sides of the rack and spaced along the length of the rack, and a central control computer with a speaker and a display screen arranged at the front end of the rack. The transmission direction of the distribution line is opposite to that of the reflow line. The distribution line includes a mirror inspection area, a process quality inspection area, a finished product sampling area, which are arranged in sequence from the beginning of the line to the end of the line. The reflow line is located below the microscopic inspection area, process quality inspection area, and finished product sampling area of the distribution line. The optical platform includes at least one microscopic inspection station corresponding to the microscopic inspection area, at least one process quality inspection station corresponding to the process quality inspection area, at least one sampling station corresponding to the finished product sampling area, at least one point-numbered cycle station corresponding to the microscopic inspection area, and at least one scanning and entry packaging station corresponding to the scanning and entry packaging area. Each optical platform is provided with an independent station number and is connected to the central control computer. The inspection process of the circuit board inspection system includes the following steps: Step 1: Determine whether the product requires microscopic inspection / specialized inspection based on the process sheet or customer requirements. Each light table controls the intelligent pager according to the status of the current work station number, indicating waiting for material collection, quality abnormality, lack of materials, or urgent lack of materials, so that the current status of each work station number is displayed on the display screen of the central control computer; if microscopic inspection / specialized inspection is required, proceed to step 2; if microscopic inspection / specialized inspection is not required, proceed to step 3; Step 2: The delivery person places the ingredient turnover basket horizontally, and the central control computer issues a voice reminder to the inspector at the microscopic inspection station to pick up the materials from the distribution line. If the inspector at the microscopic inspection station is about to wait for materials or waiting for materials, he can actively call the ingredients through the intelligent pager; after the microscopic inspection / special inspection completes the product inspection, it is placed vertically in the turnover basket at the end of the return line. The ingredient distributor receives the product. If the horizontally placed product is received, it is determined whether it is a return product inspected by the finished product factory inspector in the finished product sampling area and not accepted by the corresponding station or the finished product factory inspector returned the uninspected product. If it is a return product, it is directly distributed to the corresponding station personnel. If it is an uninspected product, jump to step 3; Step 3: The delivery person places the product horizontally on the distribution conveyor according to the lighting status of the process quality inspection station on the central control computer screen, and reminds the corresponding finished product inspector or process quality inspector to collect the materials by voice. If the finished product inspector or process quality inspector is about to receive materials or is waiting for materials, he or she can actively press the smart pager to call for materials. The finished product inspector or process quality inspector only needs to take the horizontal turnover box on the distribution line to take the materials; Step 4: After the finished product quality inspector and the process quality inspector complete their work, they sign and write their workstation number, and then place the product vertically on the distribution line in the turnover box and flow it to the finished product sampling inspection area; Step 5: Random inspection by the inspector: If the inspection is qualified, the product will be placed on the distribution line and flowed to the counting and periodic workstation; if the inspection is unqualified, the inspector will remind the corresponding inspection station by pressing the smart pager, and place the returned products horizontally on the reflow line, and the products will flow to the corresponding workstation; if the products that flow out are horizontal products, they will be placed horizontally on the reflow line to continue reflowing. The finished product inspector or process inspector will pick up the thread ends that flow to the reflow line, or the thread ends that flow to the reflow line will be fed to the material dispenser in a unified manner; Step 6: Count and divide the cycle: If OK, place the product on the second conveyor belt of the distribution line and flow it to the scanning, recording and packaging station; if NG, transfer it to the relevant processor for processing; Step 7: Scan and enter the packaging, and place the packaged product in the corresponding area at the back.

2. The inspection process of a circuit board inspection system according to claim 1, wherein: The distribution assembly line includes a first conveyor belt, a conveyor roller and a second conveyor belt. The first conveyor belt is arranged in the mirror inspection area and the process quality inspection area, the conveyor roller is arranged in the finished product sampling area, and the second conveyor belt is arranged in the counting and periodicity area and the scanning and inputting packaging area; the distribution drive motor includes a first motor and a second motor. The first motor is arranged at the head of the distribution assembly line, and the second motor is arranged at the end of the distribution assembly line. The first motor is connected to the first conveyor belt through the first conveyor chain, and the second motor is connected to the second conveyor belt through the second conveyor chain. The conveyor roller is an unpowered roller, and the return drive motor is connected to the return assembly line through the return conveyor chain.

3. The inspection process of a circuit board inspection system according to claim 2, wherein: The first motor, the second motor and the reflux drive motor are respectively connected to a frequency converter.

4. The inspection process of a circuit board inspection system according to claim 2, wherein: The frame is provided with a motor installation cabinet at the bottom of the line head and the line tail of the distribution line respectively. The first motor and the return drive motor are arranged in the motor installation cabinet at the line head of the distribution line, and the second motor is arranged in the motor installation cabinet at the line tail of the distribution line.

5. The inspection process of a circuit board inspection system according to claim 2, wherein: A block is set between the finished product sampling area and the counting and periodic area of the distribution line, a block is set between the counting and periodic area and the scanning and entry packaging area, a block is set at the end of the second conveyor belt, and a block is also set at the end of the return line.

6. The inspection process of a circuit board inspection system according to claim 2, wherein: The first conveyor belt and the second conveyor belt of the distribution line and both sides of the return line are equipped with retaining edges.

7. The inspection process of a circuit board inspection system according to claim 1, wherein: The rack is equipped with a socket panel and aviation connector corresponding to each optical platform. The signal line of each optical platform is connected to the rack signal line using aviation connectors and connected to the central control computer.

8. The inspection process of a circuit board inspection system according to claim 1, wherein: Each light platform is equipped with an alarm and an intelligent pager connected to the central control computer. The intelligent pager includes a waiting button for material collection, a quality abnormality button, a lack of material button, an emergency lack of material button and a pager.

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