FPC (Flexible Printed Circuit) reinforcing process for reinforcing position through visual identification

Abstract

The invention relates to the technical field of FPC (flexible printed circuit) production, in particular to an FPC reinforcing process for visually identifying a reinforcing position, an FPC comprises a top surface and a bottom surface, the top surface is used for welding an element, and the bottom surface is used for fixing a reinforcing plate, and the FPC reinforcing process comprises the following steps: A, clamping the FPC and straightening the FPC; b, photographing the FPC to obtain an FPC top surface image; c, acquiring component distribution of the top surface of the FPC in the image of the top surface of the FPC, and planning the position of a stiffening plate arranged on the bottom surface of the FPC and the area of the required stiffening plate according to the component distribution; and D, fixing the reinforcing plate on the bottom surface of the FPC according to the planned position of the reinforcing plate. According to the invention, the reinforcing positions actually required by the FPC and the reinforcing areas of the reinforcing positions are planned according to the component distribution on the top surface of the FPC, so that the cost is saved, and the reinforcing effect accords with the expected effect.

Description

Technical Field

[0001] The present invention relates to the technical field of FPC production, and in particular to an FPC reinforcement process for visually identifying reinforcement positions. Background Art

[0002] Because FPCs are flexible, foldable, and lightweight, they can be easily broken when bent, or fractured due to insufficient strength when components are densely packed. Therefore, some FPCs require reinforcement after component assembly and soldering. For example, a reinforcing plate can be added to the bottom of the FPC (the side not soldered to components) to improve its strength.

[0003] Commonly used FPC reinforcement plates are typically made of FR4, PI, or stainless steel sheets, tailored to the specific FPC requirements of different industries. However, to avoid excessive interference with the FPC's flexible nature, reinforcement is often applied at specific locations rather than across the entire FPC.

[0004] However, in the prior art, the reinforcement method is usually to directly fix a reinforcement plate of fixed size to the corresponding position of the FPC. This method does not adapt to the components on the FPC, which easily leads to waste of reinforcement materials or fails to achieve the ideal reinforcement effect due to insufficient reinforcement area and position deviation. Summary of the Invention

[0005] In view of the problems of the prior art, the present invention provides an FPC reinforcement process that can visually identify the reinforcement position, and plans the reinforcement position and area according to the actual distribution of electronic components on the FPC, thereby achieving the purpose of saving costs and optimizing the reinforcement effect.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides an FPC reinforcement process for visually identifying reinforcement positions, wherein the FPC includes a top surface and a bottom surface, the top surface is used for welding components, and the bottom surface is used for fixing reinforcement plates, comprising the following steps: A. Clamp the FPC and straighten it; B. Take a picture of the FPC to obtain an image of the top surface of the FPC; C. Obtain the component distribution on the top surface of the FPC from the image of the top surface of the FPC, and plan the location and area of ​​the reinforcement plate on the bottom surface of the FPC based on the component distribution; D. Fix the reinforcement plate to the bottom surface of the FPC according to the planned reinforcement plate position.

[0007] Furthermore, step C specifically includes: C1. Analyze the image of the top surface of the FPC to obtain the component type and component location on the top surface of the FPC; C2. Calculate the load-bearing capacity at different locations on the FPC based on component type, and determine the strength loss at each location of the FPC due to component puncture based on component location; C3. Based on the load-bearing and loss strength values, calculate the locations where the FPC needs to be reinforced and the reinforcement area at each location.

[0008] Furthermore, the strength value lost at each position of the FPC due to component puncture is determined based on the component position, specifically including: C21. Divide the location distribution of components into regions; C22. Count the component types and the number of components of each type within a single area; C23. Calculate the total strength loss value in the area based on the number of components of each type and the strength loss value of the FPC for different components. C24. Calculate the required reinforcement plate area for this area based on the total strength loss and the unit reinforcement value of the reinforcement plate. C25. Execute steps C22-C25 for each region.

[0009] Furthermore, when the required reinforcement plate area of ​​a region overlaps with the reinforcement plate area of ​​an adjacent region, the following steps are performed: The areas where the required reinforcement plates overlap are divided into the same area, and then steps C22-C23 are performed.

[0010] Furthermore, step B further includes: obtaining a side image of the FPC; Step C21 further includes: obtaining the thickness of the FPC in different areas through the side image of the FPC to infer the actual strength value of each area of ​​the FPC; In step C24, the area of ​​the reinforcement plate in the region needs to be calculated in combination with the actual load-bearing value of the region.

[0011] Furthermore, step A specifically includes: Clamp both sides of the FPC with two flexible clamps; Control the two flexible fixtures to move away from each other, and monitor the changes in the reaction force exerted on the flexible fixture by the FPC while the flexible fixtures are moving; When the reaction force exerted by the FPC on the flexible clamp reaches a preset value, or the deflection value of the FPC is less than the preset deflection value, the flexible clamp will no longer move.

[0012] Furthermore, the two sides of the FPC are clamped by two flexible clamps, specifically including: Use a flexible fixture to contact the top and bottom of the FPC through two air bags respectively; Inflate the airbag and monitor the force between the airbag and the FPC; When the force reaches the preset value, the airbag is stopped from being inflated.

[0013] Furthermore, step D specifically includes: D1. According to the results of step C, preparing the corresponding number and area of ​​reinforcing plates; D2. Based on the results of step C, place the reinforcement plate in the magnetic fixture; D3. Use a magnetic fixture to magnetically attract the reinforcement plate for positioning; D4. Place the bottom surface of the FPC against the reinforcement plate, and then fix the FPC to the reinforcement plate.

[0014] Furthermore, step D4 specifically includes: D41. Press the FPC and the reinforcement plate together to achieve a single fixation. D42. Transfer the FPC with the reinforcement plate pressed together to the welding equipment, and use the welding equipment to fix the FPC and the reinforcement plate again.

[0015] Furthermore, before step D41, the following steps are further included: According to the result of step C, determine whether the FPC can be drilled. If not, execute steps D41-D42, and then execute steps D43-D45; D43. Drill holes in the FPC; D44. Place the bottom surface of the FPC against the reinforcement plate, and then add flux into the hole of the FPC; D45. Solder the holes of the FPC, and then perform D42 after the headquarters.

[0016] Beneficial effects of the present invention: The present invention plans the reinforcement positions actually required for the FPC and the reinforcement areas of each reinforcement position by distributing components on the top surface of the FPC, thereby achieving cost savings and ensuring that the reinforcement effect meets expectations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the present invention.

[0018] Figure 2 Schematic diagram of the flexible clamp of the present invention.

[0019] Figure 3 Schematic diagram of the magnetic fixture of the present invention.

[0020] Figure numerals: 1—finger cylinder, 2—airbag, 3—limiting member, 4—pressure sensor, 5—transverse movement device, 6—magnetic fixture, 7—electromagnetic structure. DETAILED DESCRIPTION

[0021] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings. The contents mentioned in the embodiments are not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0022] like Figure 1 As shown, the present invention provides an FPC reinforcement process for visually identifying the reinforcement position, wherein the FPC includes a top surface and a bottom surface, the top surface is used for welding components, and the bottom surface is used for fixing the reinforcement plate, comprising the following steps: A. Clamp the FPC and straighten it; B. Take a picture of the FPC to obtain an image of the top surface of the FPC; C. Obtain the component distribution on the top surface of the FPC from the image of the top surface of the FPC, and plan the location and area of ​​the reinforcement plate on the bottom surface of the FPC based on the component distribution; D. Fix the reinforcement plate to the bottom surface of the FPC according to the planned reinforcement plate position.

[0023] After research, it was found that the locations where FPC needs to be reinforced are often where components are installed. Because the components need to puncture the FPC for fixation, the weight of the components themselves increases the load on the FPC, and the strength of the FPC at the punctured location will inevitably decrease.

[0024] Therefore, the present invention uses a visual device to capture an image of the straightened FPC to obtain the distribution position of components, and sets the number and area of ​​reinforcing plates based on the component distribution of the FPC, thereby ensuring that the position where each reinforcing plate is connected to the FPC is necessarily the position of the FPC that most needs reinforcement. This ensures that the reinforcing plates will not be wasted due to the actual area being larger than the required value, and that the strength of the FPC will not meet expectations due to inaccurate reinforcement plate positioning.

[0025] In this embodiment, step A specifically includes: Clamp both sides of the FPC with two flexible clamps; Control the two flexible fixtures to move away from each other, and monitor the changes in the reaction force exerted on the flexible fixture by the FPC while the flexible fixtures are moving; When the reaction force exerted by the FPC on the flexible clamp reaches a preset value, or the deflection value of the FPC is less than the preset deflection value, the flexible clamp will no longer move.

[0026] Clamping the FPC with a flexible clamp can ensure that the FPC will not be damaged while being clamped stably, and will not affect the actual effect of obtaining the FPC image due to high deformation stress caused by rigid clamping.

[0027] And as Figure 2As shown, the flexible clamp of this embodiment has the following structure: it includes a finger cylinder 1, a transverse movement device 5 and two airbags 2. The two airbags 2 are respectively installed at the two output ends of the finger cylinder 1. The transverse movement device 5 is used to drive the finger cylinder 1 to move transversely. There is a limiter 3 between the two output ends of the finger cylinder 1, and the airbag 2 is also provided with a pressure sensor.

[0028] The transverse movement device 5 is preferably an electric cylinder driven by a servo motor, which can accurately control the moving distance of the finger cylinder 1; and the limiter 3 is used to limit the minimum distance between the two output ends of the finger cylinder 1. For example, when the thickness of the FPC is L, it is preferred that the minimum distance between the two output ends is 1.5-3L.

[0029] Based on the above-mentioned flexible clamp, the two sides of the FPC are clamped by two flexible clamps, specifically including: Use a flexible clamp to contact the top and bottom of the FPC through two air bags 2 respectively; Inflate the airbag 2 and monitor the force between the airbag 2 and the FPC; When the force reaches a preset value, the inflation of the airbag 2 is stopped.

[0030] To ensure the safety of the FPC, taking the clamping of one side of the FPC as an example, when clamping the FPC, the present invention first controls the movement of the finger cylinder 1 through the lateral movement device 5 until the FPC is located between the two airbags 2. Then, the finger cylinder 1 is actuated to control the two airbags 2 to move closer to each other until the limiter 3 stops the finger cylinder 1 from continuing to move. The distance between the two airbags 2 must be greater than the thickness of the FPC. Subsequently, the interior of the airbag 2 is inflated, and the airbag 2 is expanded to reduce the distance between the two airbags 2. When the airbag 2 contacts the FPC, the pressure sensor 4 provided on the surface of the airbag 2 is triggered by the FPC and sends a signal, so that the pressure currently applied by the airbag 2 to the FPC can be known based on the signal. When the above pressure reaches the preset value, the airbag 2 is no longer inflated. At this time, the clamping force of the airbag 2 on the FPC must be sufficient to stably clamp the FPC without causing excessive squeezing of the FPC.

[0031] The airbag 2 is used to achieve the final compensation, which is beneficial to ensure the safety of the FPC. The limiter 3 cooperates with the finger cylinder 1 to ensure that the finger cylinder 1 will not damage the FPC due to insufficient movement accuracy.

[0032] In this embodiment, an industrial camera is used to capture the top surface of the FPC to obtain an image of the FPC. The high precision of the industrial camera ensures the accuracy of the image, thereby reliably obtaining parameters such as the specifications, location, and quantity of the components.

[0033] In this embodiment, step C specifically includes: C1. Analyze the image of the top surface of the FPC to obtain the component type and component location on the top surface of the FPC; C2. Calculate the load-bearing capacity at different locations on the FPC based on component type, and determine the strength loss at each location of the FPC due to component puncture based on component location; C3. Based on the load-bearing and loss strength values, calculate the locations where the FPC needs to be reinforced and the reinforcement area at each location.

[0034] Image analysis of FPC can be achieved by combining AI with manual training. AI equipment is used to analyze the type, position, specifications, etc. of each component based on the features in the image. Combined with pre-entered parameters such as the pin length and weight of each component, the load-bearing capacity of each position of the FPC and the loss of FPC strength caused by components piercing the FPC can be calculated.

[0035] Since the strength and strength loss of the FPC are related to parameters such as the material, thickness, and structure of the FPC, which can be obtained by those skilled in the art through actual experiments, the present invention will not be further elaborated here.

[0036] Because the present invention combines the type and position distribution of each component on the FPC to calculate the reinforcement strength, and then uses the reinforcement strength to infer the area of ​​the required reinforcement plate, it can ensure that the reinforcement plate is not wasted. The present invention can also calculate the location of the FPC that requires reinforcement, and then use vision and robotics to locate the reinforcement plate and the location of the FPC that requires reinforcement, so as to ensure that the reinforcement plate is accurately fixed to the required position of the FPC, thereby maximizing the efficiency of the reinforcement plate.

[0037] In this embodiment, the determination of the strength loss of each position of the FPC due to component puncture based on the component position specifically includes: C21. Divide the location distribution of components into regions; C22. Count the component types and the number of components of each type within a single area; C23. Calculate the total strength loss value in the area based on the number of components of each type and the strength loss value of the FPC for different components. C24. Calculate the required reinforcement plate area for this area based on the total strength loss and the unit reinforcement value of the reinforcement plate. C25. Execute steps C22-C25 for each region.

[0038] Since components are not evenly distributed on the FPC, peripheral circuits are usually arranged around each integrated chip, allowing the components on the FPC to be distributed in a modular manner. For example, if only scattered components are soldered in an area, this area does not actually require reinforcement.

[0039] Therefore, the present invention divides the FPC into regions, and the division method is as follows: The first step is to use the integrated chip as a reference point and group all components around the integrated chip into one area. The remaining boundaries are defined as "the distance between the outermost component and the adjacent component exceeds the preset distance"; Step 2: Based on the first step, the area is as rectangular as possible; only when the area is at the boundary of the FPC, it may not be rectangular; Step 3: After completing the division of regions as described above, the space between adjacent regions is also considered as one region.

[0040] By using this method to divide the FPC into regions, the number, specifications, and types of electronic components in each region can be determined. Then, C21-C25 are performed to complete the corresponding calculations for the entire FPC. In these calculations, an expected strength value should be set. If, after calculating the strength loss value, the actual strength value of the FPC region is still greater than the expected strength value, then the open area does not require reinforcement. If the calculated actual strength value is less than the expected strength value, reinforcement is definitely necessary.

[0041] According to the above calculations, some areas will not need reinforcement. Therefore, when a certain area has excessive strength loss and a large load-bearing capacity, resulting in the area requiring reinforcement plates being larger than the area of ​​the area, the adjacent area can be "borrowed" for space. That is, the bottom surface of the adjacent area that does not require reinforcement makes way for the reinforcement plate, effectively ensuring that there are sufficient spaces for the reinforcement plates.

[0042] Specifically, there is another situation: when two adjacent areas need to be reinforced, and the area of ​​the reinforcement plate required for one area overlaps with the area of ​​the reinforcement plate of the adjacent area, the following steps are performed: The areas where the required reinforcement plates overlap are divided into the same area, and then steps C22-C23 are performed.

[0043] In other words, in the above scenario, the two areas are simply divided into a single region (hereinafter referred to as the large region) for reinforcement plate calculation. If none of the adjacent areas within the large region require reinforcement, the corresponding large-area reinforcement plate can be installed to "borrow" space from the adjacent areas. If the adjacent area also requires reinforcement, the next adjacent area is also divided into the large region before calculating the required reinforcement plate area. Since in actual applications, there will inevitably be multiple areas that do not require reinforcement, repeatedly calculating according to the above method of forming large regions can ultimately determine the required reinforcement plate area for the large region.

[0044] It's important to note that when calculating the reinforcement area for a large area, it's usually sufficient to simply add up the required reinforcement areas for each zone within the large area. Alternatively, the load-bearing values ​​and lost strength values ​​for each zone within the large area can be summed separately, and then the calculation is performed based on the unit reinforcement area of ​​the reinforcement plate. While the former method is simple, the unit reinforcement strength will change as the area of ​​the reinforcement plate increases, so it requires some redundancy in the calculation. The latter method, while more computationally intensive, is a more practical reinforcement solution.

[0045] In this embodiment, step B further includes: acquiring a side image of the FPC.

[0046] That is, due to current process defects, the thickness of the FPC varies at different locations. This thickness difference also causes variations in the load-bearing capacity and strength of the FPC at different locations. Therefore, when photographing the FPC, the present invention should set up two cameras, one to capture the top and the other to capture the side of the FPC. The top camera is used to capture the components and the shape and area of ​​the top surface, while the side camera is used to capture the thickness of the FPC at different locations.

[0047] Therefore, step C21 should also include: obtaining the thickness of the FPC in different areas through the side image of the FPC to infer the actual strength value of each area of ​​the FPC; In step C24, the area of ​​the reinforcement plate in that area must be calculated based on the actual load-bearing value of that area. Based on the above-mentioned image of the FPC side, the actual load-bearing value of each FPC area can be calculated. The total strength loss value calculated in step B23 should also be calculated based on the actual strength value of each area to ensure a more accurate calculation result and more precise calculation of the reinforcement plate area.

[0048] While the aforementioned thickness values ​​may have a minor impact, when incorporated into calculations, they can affect the final area of ​​the reinforcement plate, which in turn affects the FPC's bending properties. Therefore, more accurate parameter calculations will inevitably impact the subsequent installation and application of the FPC.

[0049] The above mainly discusses how to clamp the FPC while reducing the internal stress of the FPC and avoiding damage to the FPC, as well as how to calculate and plan the position and area of ​​the reinforcement plate based on a visual method. The following also needs to discuss how to apply the above results to the fixation of the FPC and the reinforcement plate.

[0050] Therefore, in this embodiment, step D specifically includes: D1. According to the results of step C, preparing the corresponding number and area of ​​reinforcing plates; D2. According to the result of step C, place the reinforcement plate in the magnetic fixture 6; D3. Use magnetic fixture 6 to magnetically attract the reinforcement plate for positioning; D4. Place the bottom surface of the FPC against the reinforcement plate, and then fix the FPC to the reinforcement plate.

[0051] That is, when executing steps B and C, the flexible clamp still clamps the FPC; the first thing to do in step D is to make a suitable reinforcement plate based on the calculation results of step C. For example, in this embodiment, stainless steel is preferably used as the reinforcement plate, and the manufacturing process should be as follows: A protective film is formed on the plate by exposure and development, and then the plate is etched to form multiple blanks of the required area. The blanks are then cleaned and dried to form reinforcement plates.

[0052] The reinforcement plate formed by wet etching has no sharp surfaces or burrs, so it will not interfere with the FPC's current transmission after being fixed to the FPC. To improve efficiency, reinforcement plates of various specifications can be prepared at one time and then used directly when needed.

[0053] As for the method of fixing the reinforcement plate, the present invention adopts a magnetic fixing method, that is, the reinforcement plate is placed in the magnetic fixture 6, and then the electromagnetic structure 7 of the magnetic fixture 6 is energized, and the magnetic field generated by the electromagnetic structure 7 is used to magnetically attract the reinforcement plate; then the FPC and the reinforcement plate can be fixed in a predetermined posture, thereby ensuring that the relative position of the two is basically consistent with the calculated result.

[0054] The structure of the magnetic fixture 6 can be referred to Figure 3 In fact, there are multiple magnetic structures distributed. After the reinforcement plate is placed, the corresponding magnetic structure directly below the reinforcement plate is driven to complete the magnetic attraction. The magnetic field will not be too strong due to the usual control of all magnetic structures being energized at the same time, thus avoiding affecting the FPC.

[0055] In this embodiment, step D4 specifically includes: D41. Press the FPC and the reinforcement plate together to achieve a single fixation. D42. Transfer the FPC with the reinforcement plate pressed together to the welding equipment, and use the welding equipment to fix the FPC and the reinforcement plate again.

[0056] That is, the FPC and the reinforcement plate need to be fixed twice. The first time is to press the two together, using the intermolecular force to keep their relative posture unchanged. Then, the reinforcement plate needs to be welded to the FPC to achieve a stable fixation effect.

[0057] As an extension of the above method, the following steps may be included before step D41: According to the result of step C, determine whether the FPC can be drilled. If not, execute steps D41-D42, and then execute steps D43-D45; D43. Drill holes in the FPC; D44. Place the bottom surface of the FPC against the reinforcement plate, and then add flux into the hole of the FPC; D45. Solder the holes of the FPC, and then perform D42 after the headquarters.

[0058] Press-fitting may damage FPC components. Therefore, if the area of ​​the FPC requiring reinforcement is small, consider drilling additional holes in the FPC. After positioning the FPC and the reinforcement plate, add flux to the holes and directly complete the initial fixation by welding. This ensures that the FPC and reinforcement plate will not separate when the structure is transferred. The subsequent secondary fixation is also to ensure that the connection between the two is more secure, so that the FPC and reinforcement plate will not separate when the FPC is subsequently processed and installed, causing greater impact.

[0059] Of course, the above methods are all based on the premise of determining whether the FPC can be drilled. Specifically, steps D43-D45 can only be performed when the non-reinforced area of ​​the FPC can be drilled. Otherwise, it is more preferable to use a pressing method for one-time fixation; and in order to ensure stable pressing, a flexible structure can be used to contact the top surface of the FPC during pressing, and the FPC and the reinforcement plate can be pressed at a higher temperature.

[0060] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are all within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. An FPC reinforcement process for visually identifying reinforcement positions, wherein the FPC comprises a top surface and a bottom surface, the top surface being used for welding components and the bottom surface being used for fixing reinforcement plates, characterized in that: The following steps are involved: A. Clamp the FPC and straighten it; B. Take a picture of the FPC to obtain an image of the top surface of the FPC; C. Obtain the component distribution on the top surface of the FPC from the image of the top surface of the FPC, and plan the location and area of ​​the reinforcement plate on the bottom surface of the FPC based on the component distribution; D. Fix the reinforcement plate to the bottom surface of the FPC according to the planned reinforcement plate position.

2. The FPC reinforcement process according to claim 1, wherein: Step C specifically includes: C1. Analyze the image of the top surface of the FPC to obtain the component type and component location on the top surface of the FPC; C2. Calculate the load-bearing capacity at different locations on the FPC based on component type, and determine the strength loss at each location of the FPC due to component puncture based on component location; C3. Based on the load-bearing and loss strength values, calculate the locations where the FPC needs to be reinforced and the reinforcement area at each location.

3. The FPC reinforcement process according to claim 2, wherein: The method of determining the strength loss of each position of the FPC due to component puncture based on the component position specifically includes: C21. Divide the location distribution of components into regions; C22. Count the component types and the number of components of each type within a single area; C23. Calculate the total strength loss value in the area based on the number of components of each type and the strength loss value of the FPC for different components. C24. Calculate the required reinforcement plate area for this area based on the total strength loss and the unit reinforcement value of the reinforcement plate. C25. Execute steps C22-C25 for each region.

4. The FPC reinforcement process according to claim 3, wherein: When the required reinforcement plate area of ​​one area overlaps with the reinforcement plate area of ​​an adjacent area, perform the following steps: The areas where the required reinforcement plates overlap are divided into the same area, and then steps C22-C23 are performed.

5. The FPC reinforcement process by visually identifying the reinforcement position according to claim 2, characterized in that: Step B also includes: obtaining a side image of the FPC; Step C21 further includes: obtaining the thickness of the FPC in different areas through the side image of the FPC to infer the actual strength value of each area of ​​the FPC; In step C24, the area of ​​the reinforcement plate in the region needs to be calculated in combination with the actual load-bearing value of the region.

6. The FPC reinforcement process by visually identifying the reinforcement position according to claim 1, characterized in that: Step A specifically includes: Clamp both sides of the FPC with two flexible clamps; Control the two flexible fixtures to move away from each other, and monitor the changes in the reaction force exerted on the flexible fixture by the FPC while the flexible fixtures are moving; When the reaction force exerted by the FPC on the flexible clamp reaches a preset value, or the deflection value of the FPC is less than the preset deflection value, the flexible clamp will no longer move.

7. The FPC reinforcement process according to claim 6, wherein: The two flexible clamps are used to clamp the two sides of the FPC, specifically including: Use a flexible fixture to contact the top and bottom of the FPC through two air bags respectively; Inflate the airbag and monitor the force between the airbag and the FPC; When the force reaches the preset value, the airbag is stopped from being inflated.

8. The FPC reinforcement process by visually identifying the reinforcement position according to claim 1, characterized in that: Step D specifically includes: D1. According to the results of step C, preparing the corresponding number and area of ​​reinforcing plates; D2. Based on the results of step C, place the reinforcement plate in the magnetic fixture; D3. Use a magnetic fixture to magnetically attract the reinforcement plate for positioning; D4. Place the bottom surface of the FPC against the reinforcement plate, and then fix the FPC to the reinforcement plate.

9. The FPC reinforcement process by visually identifying the reinforcement position according to claim 8, characterized in that: Step D4 specifically includes: D41. Press the FPC and the reinforcement plate together to achieve a single fixation. D42. Transfer the FPC with the reinforcement plate pressed together to the welding equipment, and use the welding equipment to fix the FPC and the reinforcement plate again.

10. The FPC reinforcement process according to claim 9, wherein: Before step D41, the following steps are also included: According to the result of step C, determine whether the FPC can be drilled. If not, execute steps D41-D42, and then execute steps D43-D45; D43. Drill holes in the FPC; D44. Place the bottom surface of the FPC against the reinforcement plate, and then add flux into the hole of the FPC; D45. Solder the holes of the FPC, and then perform D42 after the headquarters.

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