Universal FPCA (Flexible Principal Component Analysis) assembly pressurizing jig and FPCA assembly method thereof

Abstract

The invention discloses a universal FPCA assembly pressurization jig and an FPCA assembly method thereof, and relates to the technical field of FPCA assembly, the jig comprises a universal bearing base, an iron frame auxiliary device, a positioning device, a pressure maintaining device and an integrated PLC electric control device, and the base is provided with an adjustable positioning hole group to adapt to products of different specifications; the positioning device comprises an appearance matching groove, a vacuum adsorption hole and an LED clearance groove, the iron frame auxiliary device achieves accurate positioning through a clamping block, an electric push rod and a pneumatic guide rail, and the pressure maintaining device guarantees uniform pressurization through an air cylinder and a sliding rail. According to the assembling method, through the standardized processes of jig pre-adjustment, FPCA positioning, iron frame positioning, pressurization and pressure maintaining and part taking and resetting and in combination with PLC closed-loop control, it is ensured that the assembling deviation is smaller than or equal to 0.3 mm, and LED lamp beads are prevented from being damaged. The method has high universality, effectively reduces the production cost, and is suitable for mass production scenes such as a vehicle-mounted backlight source and the like with high requirements on the FPCA assembly precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of FPCA assembly, in particular to a universal FPCA assembly pressurizing jig and an FPCA assembly method thereof. BACKGROUND

[0002] When the vehicle-mounted backlight FPCA is assembled, the LED cannot be touched to prevent damage to the LED, and the assembly precision requirement is relatively high, and the FPCA needs to be accurately assembled and bonded to the inner side of the lower iron frame. In order to prevent the FPCA from being assembled out of position and causing the backlight optical measurement to fail, the bonding of the FPCA and the inner side of the iron frame requires high activation rate of the heat-conducting double-sided adhesive tape (to ensure that the FPCA is firmly bonded to the iron frame).

[0003] The existing FPCA pressurizing jig has the following defects: First, the universality is poor, and most of the single jigs are designed for special purposes and are only suitable for one specification product. When the product is changed, the entire set of jigs needs to be replaced, which is costly and inefficient. Second, the LED lamp bead protection is missing, and it is easy to be damaged during the assembly process. Therefore, the present application provides a universal FPCA assembly pressurizing jig and an FPCA assembly method thereof to solve one or more of the above problems. SUMMARY

[0004] The present application aims to provide a universal FPCA assembly pressurizing jig and an FPCA assembly method thereof to solve one or more of the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a universal bearing base, an iron frame auxiliary device, a positioning device, and a pressure maintaining device, the universal bearing base is used to assemble and position various functional modules, and the universal bearing base is provided with an adjustable positioning hole group suitable for mounting different specifications of components, the iron frame auxiliary device is detachably assembled on the table top of the universal bearing base, the positioning device and the pressure maintaining device are installed on the front side of the universal bearing base, and the pressure maintaining device is located on the top of the positioning device.

[0006] Preferably, the iron frame auxiliary device includes a support back plate, an adjustment fixing block, an adjustment support block, a lower iron auxiliary positioning block, and a lower iron auxiliary clamping block, the support back plate is installed on the universal bearing base through a support block, the adjustment fixing block is installed on the front side of the support back plate through a bolt, the adjustment support blocks are installed on both sides of the adjustment fixing block, the lower iron auxiliary positioning block is installed on the top of the adjustment fixing block through an electric push rod, and the two groups of lower iron auxiliary clamping blocks are symmetrically movably arranged on the top of the lower iron auxiliary positioning block.

[0007] Preferably, the support back plate rear wall is provided with support blocks mounted by bolts, the support blocks are mounted on the universal load-bearing base by bolts at the bottom, the support back plate is provided with scale lines symmetrically on both sides, and the support back plate is provided with a plurality of groups of fixed clamping holes one and fixed clamping grooves one.

[0008] Preferably, the outer wall of each group of electric push rods is provided with the same fixed sleeve, each group of fixed sleeves is mounted on the bottom of the adjusting fixed block by bolts, the output end of the electric push rod extends to the top of the adjusting fixed block and is fixedly connected with the lower iron auxiliary positioning block, the adjusting fixed block is provided with through fixed clamping holes two on the front and rear sides, and the adjusting fixed block is provided with fixed clamping holes four on the left and right sides.

[0009] Preferably, the adjusting support block is provided with a fixed clamping groove two, the bolt passes through the fixed clamping groove two and is screwed into the fixed clamping hole four, the adjusting fixed block is connected with the adjusting support block, the lower iron auxiliary positioning block is provided with a guide sliding groove one symmetrically on the top, and a plurality of groups of bolt holes one are formed in the guide sliding groove one.

[0010] Preferably, the lower iron auxiliary clamping block includes a lower iron clamping block sliding member, a connecting block and a rubber clamping block, the lower iron clamping block sliding member is slidably arranged in the guide sliding groove one, the lower iron clamping block sliding member is provided with a fixed clamping groove three, the connecting block is fixedly connected with the lower iron clamping block sliding member, the connecting block and the rubber clamping block are provided with the same fixed clamping holes three, and the rubber clamping block is connected with the connecting block by bolts.

[0011] Preferably, the pneumatic guide rail is mounted on the universal load-bearing base, the connecting piece is mounted on the moving seat of the pneumatic guide rail by bolts, one end of the support rod is connected with the connecting piece by bolts, the other end of the support rod is provided with a roller fixing seat, a silica gel roller is movably arranged on the roller fixing seat, and the end of the support rod close to the roller fixing seat is provided with a fixed clamping groove four.

[0012] Preferably, the positioning device includes a positioning carrier plate, the positioning carrier plate is mounted on the front side of the support back plate by bolts, the positioning carrier plate is provided with a positioning connecting groove, an FPC shape adaptation groove, an array type vacuum adsorption hole and an LED avoidance groove on the top, the array type vacuum adsorption hole is used for fixing FPCA under negative pressure, and the LED avoidance groove is used for avoiding LED lamp beads on the FPCA.

[0013] Preferably, the pressure maintaining device includes a pressurizing cylinder, the pressurizing cylinder is fixedly arranged on the front side of the universal load-bearing base, an aluminum block is fixedly arranged on the output end of the pressurizing cylinder, the aluminum block is connected with the optim power glue pressing block through a pad, a slide rail is mounted on the front side of the universal load-bearing base, and a connecting support is mounted on the slide rail through a sliding block and is fixedly connected with the aluminum block at the bottom.

[0014] A method for assembling FPCA is used for controlling a universal FPCA assembly pressure jig to assemble, and includes the following steps: S0: tool pre-adjustment: according to FPCA and iron frame specifications, through the adjustable positioning hole group of the universal bearing base, adjust and fix the support back plate, adjustment fixing block, adjustment support block and positioning carrier plate; S1: FPCA positioning: place the FPCA in the FPC shape fitting groove of the positioning carrier plate, embed the LED lamp bead in the LED air avoidance groove, start the vacuum generator in the universal bearing base, and fix it through the array type vacuum adsorption hole; S2: iron frame positioning: adjust the iron auxiliary clamping block to clamp the iron frame, drive the lower iron auxiliary positioning block to the appropriate height by the electric push rod, and drive the silica gel roller to laterally position the iron frame by the pneumatic guide rail; S3: pressure maintaining: the pressure cylinder drives the excellent glue pressing block to press along the slide rail, and the pressure is maintained for 3-20s; S4: take out and reset: reset the pressure cylinder and each part, turn off the vacuum, loosen the lower iron auxiliary clamping block, and take out the assembled part; change the specification and adjust the tool.

[0015] Compared with the prior art, the beneficial effects of the present application are: The universal assembled FPCA pressing tool and the assembling method thereof of the present application, through modular design and adjustable structure depth cooperation, relying on the adjustable positioning hole group of the universal bearing base, can flexibly adjust the installation position of each functional module to adapt to different specifications of FPCA and iron frame, greatly improving the changeover efficiency and reducing the production cost; during the assembling process, the FPCA is double-precisely positioned through the FPC shape fitting groove and the array type vacuum adsorption, the LED lamp bead is prevented from being damaged by pressure through the LED air avoidance groove, the iron frame is precisely aligned through the mechanical clamping of the lower iron auxiliary clamping block, the lifting adjustment of the electric push rod and the lateral thrust (0.2-0.5MPa) of the pneumatic guide rail, and the excellent glue pressing block driven by the pressure cylinder and the slide rail guide structure are matched to ensure that the pressure is uniformly transmitted to the whole domain of the iron frame, and the assembling deviation is strictly controlled within ≤0.3mm, effectively guaranteeing the optical performance, heat dissipation effect and service life of the vehicle-mounted backlight source; the integrated PLC electric control device realizes real-time feedback and closed-loop control through sensors, realizes the automation of the whole assembling process, supports ≥20 groups of parameter storage and visual man-machine interactive operation, shortens the single product assembling cycle, avoids human error, and guarantees the operation safety and product qualification rate through multiple safety protection mechanisms such as infrared induction and emergency stop button, and meets the core needs of high precision, high universality and high automation of FPCA assembling in vehicle-mounted backlight source and other scenes, and has the advantages of convenient operation and batch production adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a three-dimensional structure schematic diagram of the present application; Figure 2 is a support back plate structure schematic diagram of the present application Figure 1 ; Figure 3 is a support back plate structure schematic diagram of the present applicationFigure 2 ; Figure 4 Part structure diagram of the iron frame auxiliary device of the present application Figure 1 ; Figure 2 Part structure diagram of the iron frame auxiliary device of the present application Figure 6 ; Figure 3 Part structure diagram of the iron frame auxiliary device of the present application Figure 7 ; Figure 8 Structure diagram of the lower iron auxiliary clamping block of the present application Figure 9 Structure diagram of the positioning carrier plate of the present application Figure 8 Structure diagram of the positioning carrier plate of the present application Figure 10 Enlarged structure diagram of the A part of the present application Figure 1 Structure diagram of the pressure maintaining device of the present application

[0017] In the figure: 1, general type bearing base; 2, iron frame auxiliary device; 3, positioning device; 4, pressure maintaining device; 5, support back plate; 6, support block; 7, fixed clamping hole one; 8, avoidance groove; 9, scale line; 10, fixed clamping groove one; 11, adjustment fixed block; 12, adjustment support block; 13, lower iron auxiliary positioning block; 14, lower iron auxiliary clamping block; 15, electric push rod; 16, fixed clamping groove two; 17, guide sliding groove one; 18, bolt hole one; 19, fixed clamping hole two; 20, lower iron clamping block sliding piece; 21, fixed clamping groove three; 22, connecting block; 23, rubber clamping block; 24, fixed clamping hole three; 25, pneumatic guide rail; 26, connecting piece; 27, support rod; 28, fixed clamping groove four; 29, roller fixed seat; 30, silica gel roller; 31, fixed sleeve; 32, fixed clamping hole four; 33, positioning carrier plate; 34, positioning connecting groove; 35, FPC contour adaptive groove; 36, array type vacuum adsorption hole; 37, LED avoidance groove; 38, pressure cylinder; 39, aluminum block; 40, cushion block; 41, optimus glue pressure block; 42, sliding rail; 43, sliding block; 44, connecting support. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0019] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] Embodiment 1: please refer to Figures 2-10 The present application provides a technical solution, which comprises a universal bearing base 1, an iron frame auxiliary device 2, a positioning device 3 and a pressure maintaining device 4. The universal bearing base 1 is used for assembling and positioning various functional modules, and is provided with an adjustable positioning hole group suitable for mounting components of different specifications. The iron frame auxiliary device 2 is detachably assembled on the tabletop of the universal bearing base 1. The positioning device 3 and the pressure maintaining device 4 are installed on the front side of the universal bearing base 1, and the pressure maintaining device 4 is located on the top of the positioning device 3.

[0022] The working principle and beneficial effects of the above technical solution are as follows: The universal bearing base 1 is used as the core assembly reference, and the basic assembly of FPCA and iron frame is realized through modular design. First, by using the adjustable positioning hole group on the base, the installation positions of the iron frame auxiliary device 2, the positioning device 3 and the pressure maintaining device 4 can be flexibly adjusted according to the specifications of the FPCA and the iron frame to be assembled, so as to ensure that each module adapts to the assembly requirements of different sizes. During assembly, the positioning device 3 provides basic positioning support for the FPCA, the iron frame auxiliary device 2 assists the iron frame to preliminarily adhere to the positioning reference, and the pressure maintaining device 4 is installed on the top of the positioning device 3, which can accurately align the adhesion area of the iron frame and the FPCA. Through the downward pressing action, the adhesion and fixation of the two are realized. Through the unified assembly and positioning of each module by the base, the basic working link of "positioning-assisting-pressing" is formed, which provides structural support for subsequent precise assembly.

[0023] Embodiment 2: on the basis of embodiment 1, please refer to ​The iron frame auxiliary device 2 comprises a support back plate 5, an adjusting fixed block 11, an adjusting support block 12, a lower iron auxiliary positioning block 13 and a lower iron auxiliary clamping block 14. The support back plate 5 is installed on the universal bearing base 1 through a support block 6. The adjusting fixed block 11 is installed on the front side of the support back plate 5 through a bolt. The adjusting support block 12 is installed on the both sides of the adjusting fixed block 11. The lower iron auxiliary positioning block 13 is installed on the top of the adjusting fixed block 11 through an electric push rod 15. Two groups of lower iron auxiliary clamping blocks 14 are symmetrically and movably arranged on the top of the lower iron auxiliary positioning block 13.

[0024] Preferably, the rear wall of the support back plate 5 is provided with the support block 6 through a bolt. The bottom of the support block 6 is installed on the universal bearing base 1 through a bolt. The both sides of the support back plate 5 are symmetrically provided with scale lines 9. A plurality of groups of fixed clamping holes 7 and fixed clamping grooves 10 are formed on the support back plate 5. The bottom of the support back plate 5 is provided with an avoiding groove 8.

[0025] Preferably, the outer wall of each group of electric push rods 15 is fixedly sleeved with the same fixed sleeve 31. Each fixed sleeve 31 is installed on the bottom of the adjusting fixed block 11 through a bolt. The output end of the electric push rod 15 extends to the top of the adjusting fixed block 11 and is fixedly connected with the lower iron auxiliary positioning block 13. The adjusting fixed block 11 is provided with through fixed clamping holes 19 on the front and rear sides. The adjusting fixed block 11 is provided with fixed clamping holes 32 on the left and right sides.

[0026] Preferably, the adjusting support block 12 is provided with a fixed clamping groove 16. The bolt passes through the fixed clamping groove 16 and is screwed into the fixed clamping hole 32, thereby connecting the adjusting fixed block 11 and the adjusting support block 12. The top of the lower iron auxiliary positioning block 13 is symmetrically provided with a guide sliding groove 17. A plurality of groups of bolt holes 18 are formed on the guide sliding groove 17.

[0027] Preferably, the lower iron auxiliary clamping block 14 comprises a lower iron clamping block sliding piece 20, a connecting block 22 and a rubber clamping block 23. The lower iron clamping block sliding piece 20 is slidably arranged in the guide sliding groove 17. The lower iron clamping block sliding piece 20 is provided with a fixed clamping groove 21. The connecting block 22 is fixedly connected with the lower iron clamping block sliding piece 20. The connecting block 22 and the rubber clamping block 23 are provided with the same fixed clamping holes 24. The rubber clamping block 23 is connected with the connecting block 22 through a bolt.

[0028] Preferably, the pneumatic guide rail 25 is installed on the universal bearing base 1. The connecting piece 26 is installed on the moving seat of the pneumatic guide rail 25 through a bolt. One end of the support rod 27 is connected with the connecting piece 26 through a bolt. The other end of the support rod 27 is provided with the roller fixed seat 29. The silica gel roller 30 is movably arranged on the roller fixed seat 29. The end of the support rod 27 close to the roller fixed seat 29 is provided with a fixed clamping groove 28.

[0029] Preferably, the positioning device 3 includes a positioning carrier plate 33, which is bolted to the front side of the support back plate 5. The positioning carrier plate 33 has a positioning connection groove 34, and the top of the positioning carrier plate 33 has an FPC shape adaptation groove 35, an array of vacuum adsorption holes 36, and an LED clearance groove 37. The array of vacuum adsorption holes 36 is used to fix the FPCA under negative pressure, and the LED clearance groove 37 is used to avoid the LED beads on the FPCA.

[0030] Preferably, the pressure holding device 4 includes a pressure cylinder 38, which is fixedly mounted on the front side of the universal support base 1. An aluminum block 39 is fixedly mounted on the output end of the pressure cylinder 38. The aluminum block 39 is connected to the urethane pressure block 41 through a pad 40. A slide rail 42 is mounted on the front side of the universal support base 1. A connecting bracket 44 is mounted on the slide rail 42 through a slider 43, and the bottom of the connecting bracket 44 is fixedly connected to the aluminum block 39.

[0031] Preferably, a vacuum generator is installed inside the universal support base 1.

[0032] The working principle and beneficial effects of the above technical solution are as follows: The assembly of FPCA (flexible circuit board) and iron frame is one of the core processes. Its assembly quality directly affects the optical performance, heat dissipation effect and service life of the backlight. Therefore, when assembling FPCA (flexible circuit board) and iron frame in the vehicle backlight, the LED lights on it must not be damaged, and the assembly deviation must be controlled within 0.3 mm (otherwise the backlight will be unqualified).

[0033] Therefore, the FPCA to be assembled is placed in the FPC shape adaptation groove 35 of the positioning carrier plate 33, ensuring that the edge of the FPCA fits against the groove wall. The vacuum generator is activated, and negative pressure is applied to the FPCA through the array of vacuum adsorption holes 36, so that the FPCA is tightly attached to the surface of the positioning unit. At this time, the LED beads on the FPCA are embedded in the clearance boss of the LED clearance groove 37. At the same time, the iron frame to be assembled is placed on the lower iron auxiliary positioning block 13. According to the size of the iron frame to be assembled, the position of the lower iron auxiliary clamping block 14 in the guide slide groove 17 needs to be adjusted so that the rubber clamping block 23 is aligned. The lower iron clamping block slide 20 is connected to the adjusting fixing block 11 by bolts. Then, the lower iron auxiliary positioning block 13 is pushed up and down by the electric push rod 15, which can drive the iron frame to move synchronously. At this time, the left and right front sides of the positioning device 3 are used as references to initially position the iron frame. Then, the pneumatic guide rail 25 is started, and the support rod 27 drives the silicone roller 30 to apply a lateral thrust to the iron frame (the thrust is adjusted to 0.2-0.5MPa by air pressure), so that the iron frame is tightly attached to the positioning surface of the positioning carrier plate 33, and the positioning of the iron frame is completed.

[0034] Then, the pressurizing cylinder 38 is activated, driving the urethane pressure block 41 to apply the set pressure to the iron frame. The high-precision slide rail 42 guides the aluminum block 39 to move in a straight line, ensuring that the pressure is evenly transmitted to the entire area of ​​the iron frame. The pressure is maintained according to the set holding time (3-20s), so that the thermally conductive double-sided adhesive on the iron frame is fully activated and firmly bonded to the FPCA.

[0035] After the pressure holding time ends, each actuator resets in sequence. The pressurizing cylinder 38 drives the urethane block 41 back to its initial position. The vacuum generator stops working and releases the FPCA. The pneumatic guide rail 25 drives the silicone roller 30 to detach from the iron frame. The assembled FPCA-iron frame assembly is then removed from the iron frame auxiliary device 2 by manual labor or a robotic arm, completing one FPCA assembly process. If it is necessary to continuously produce the same specification of product, steps S2-S5 can be repeated. If it is necessary to change the product specification, the iron frame auxiliary device 2 needs to be readjusted for fixture adaptation.

[0036] The bolts can be used to support the block 6 and install it on the universal bearing base 1, so that the support back plate 5 can be installed on the universal bearing base 1. The scale line 9 makes it easy to observe the installation position of the iron frame. The four fixing holes 32 at both ends of the adjusting fixing block 11 can be connected to the adjusting support block 12 by using bolts. The two fixing slots 16 can be used to adjust the height of the adjusting fixing block 11 (i.e., the distance between the universal bearing base 1 and the adjusting fixing block 11). The one fixing hole 7 makes it easy to position the carrier plate 33 and install it on the support back plate 5.

[0037] Example 3: Based on any one of Examples 1-2, the general-purpose support base 1 also integrates a PLC electronic control device. This PLC electronic control device forms a closed-loop control link with the mechanical actuators and sensors of the fixture, specifically including: 1. Core Control Modules: PLC controller, Human-Machine Interface (HMI), and relay module; the PLC controller and relay module are integrated and installed in the mounting cavity inside the general-purpose support base 1, serving as the control core responsible for instruction calculation, signal processing, and driving of the execution components; the HMI is a touch screen display, embedded in the side of the general-purpose support base 1, facilitating parameter setting and status viewing for operators, used for parameter setting, program calling, status display, and fault diagnosis; the relay module is electrically connected to the output of the PLC controller, used to amplify the control signal and achieve safe driving of high-power execution components.

[0038] 2. Signal Input Module: Force sensor, position sensor, infrared hand protection device, and emergency stop button; pressure sensors are installed in the array-type vacuum adsorption hole area of ​​the positioning carrier plate and the bottom of the urethane pressure block to monitor the vacuum adsorption force and pressurization pressure in real time; position sensors are installed on the lifting stroke end of the electric push rod, the moving seat of the pneumatic guide rail, and the piston rod of the pressurization cylinder to provide feedback on the actual position of each component; the infrared hand protection device is installed around the pressurization area of ​​the fixture, and the emergency stop button is located on the top surface of the universal bearing base, both of which serve as safety signal input sources; the signal output terminals of all sensors and safety devices are electrically connected to the signal input terminals of the PLC controller to achieve real-time status feedback.

[0039] 3. Execution Drive Module: The PLC controller is electrically connected to the following actuators via relay modules: the drive motor of the electric push rod, the pneumatic guide rail's air pressure regulating valve and drive solenoid valve, the pressurized cylinder's air pressure controller and reversing solenoid valve, and the vacuum generator's start / stop switch and negative pressure regulating valve; the optional electric slide (used to drive the lower iron auxiliary clamp to open and close automatically) is also electrically connected to the PLC controller to achieve precise drive of the power components. All connection lines are arranged through the wiring channels inside the universal bearing base to avoid exposed wear.

[0040] 4. Parameter Storage and Interaction Module: The PLC controller has a built-in storage unit that supports the storage of ≥20 sets of assembly parameters for different product specifications (including pressurization pressure, holding time 3-20s, lateral thrust 0.2-0.5MPa, vacuum adsorption force 0.5-2N, electric push rod lifting stroke, etc.); the human-machine interface supports manual parameter input, preset program calling, real-time status display (run / stop / alarm) and fault code query, and bidirectional communication with the PLC controller via the communication bus to realize real-time transmission of instructions and data.

[0041] The working principle of the above technical solution is as follows: The PLC electronic control device uses "parameter preset - status monitoring - execution drive - feedback adjustment - safety protection" as a closed-loop control logic. Before assembly, the parameters are set or the preset program is called through the human-machine interface. After startup, the PLC controller automatically performs initialization self-test. After confirming that the initial position of each component is normal, it sequentially drives the vacuum generator to achieve FPCA negative pressure positioning, the electric push rod and the pneumatic guide rail to complete the precise alignment of the iron frame, and the pressurizing cylinder to perform the pressurization and pressure holding action. Throughout the process, the pressure sensor and position sensor provide real-time feedback data and perform closed-loop adjustment. After the pressure holding is completed, the components are driven to reset in sequence according to the preset logic. At the same time, abnormal status is monitored throughout the process. If a fault is encountered, an emergency stop is triggered immediately and an alarm code is displayed.

[0042] The beneficial effects of the above technical solution are as follows: This PLC electrical control device, through deep collaboration with the mechanical structure of the fixture, and relying on real-time sensor feedback and PLC closed-loop control, supports the storage of ≥20 sets of parameters, improves changeover efficiency by more than 60%, realizes full-process automation of assembly to shorten the single-group cycle by 30% and avoid human error, and ensures operation and product quality through multiple safety mechanisms. Coupled with a visual human-machine interface, it lowers the operation threshold and is suitable for the high-precision mass production needs of automotive backlights.

[0043] Example 4: The present invention also provides a method for assembling an FPCA, used to control the assembly of a universal FPCA pressure fixture, comprising the following steps: S0: Fixture Pre-adjustment: Based on the dimensions and fit requirements of the FPCA to be assembled and the iron frame, use the adjustable positioning holes on the universal bearing base 1 to first fix the support block 6 to the preset position of the universal bearing base 1, and then install the support back plate 5; refer to the scale lines 9 on both sides of the support back plate 5 to adjust the installation height of the adjustment fixing block 11, and lock the fixing block 11 by passing the bolt through the fixing slot 7 or fixing groove 10 of the support back plate 5; slide the adjustment support block 12 to the appropriate position, so that the bolt passes through the fixing groove 16 of the adjustment support block 12 and is screwed into the fixing hole 32 of the adjustment fixing block 11 to complete the positioning of the adjustment support block 12; finally, install the positioning carrier plate 33 on the front side of the support back plate 5 with bolts, and use the positioning connecting groove 34 to ensure the installation is stable.

[0044] This step utilizes the adjustable fixing design of each component to achieve rapid adaptation of the fixture to different specifications of FPCA and iron frames, laying the foundation for subsequent precise assembly.

[0045] S1: FPCA Positioning: Place the FPCA to be assembled stably in the FPC shape adaptation groove 35 of the positioning carrier plate 33, so that the edge of the FPCA fits tightly with the groove wall, and at the same time ensure that the LED beads on the FPCA are accurately embedded in the LED clearance groove 37 to avoid damage to the LED beads due to pressure; activate the vacuum generator in the universal support base 1, and generate negative pressure through the array of vacuum adsorption holes 36 on the positioning carrier plate 33 to firmly adsorb and fix the FPCA to the surface of the positioning carrier plate 33, effectively preventing the FPCA from shifting during the assembly process.

[0046] S2: Iron Frame Positioning: According to the size of the iron frame to be assembled, slide two sets of lower iron auxiliary clamping blocks 14 along the guide slide groove 17 on the top of the lower iron auxiliary positioning block 13, so that the rubber clamping block 23 abuts against the two sides of the iron frame and forms a stable clamping. Lock the lower iron auxiliary clamping block 14 by passing the bolt through the fixing slot 21 of the lower iron clamping block sliding part 20 and the bolt hole 18 of the guide slide groove 17. Start the electric push rod 15 to drive the lower iron auxiliary positioning block 13 to lift the iron frame until the iron frame and FPCA are at the appropriate fitting height. The initial positioning of the iron frame is completed with the left and right front sides of the positioning carrier plate 33 as the reference. Start the pneumatic guide rail 25 to drive the silicone roller 30 on the support rod 27 and the roller fixing seat 29 to apply a lateral thrust of 0.2-0.5MPa to the iron frame, so that the iron frame is tightly attached to the positioning surface of the positioning carrier plate 33, and the iron frame and FPCA are accurately aligned.

[0047] S3: Pressurization and Pressure Holding: Activate the pressurization cylinder 38 of the pressure holding device 4. The output end of the pressurization cylinder 38 drives the aluminum block 39, pad block 40, and urethane pressure block 41 to descend at a uniform speed along the slide rail 42 under the guidance of the slider 43 and the connecting bracket 44, so that the urethane pressure block 41 is evenly attached to the bonding area between the iron frame and the FPCA. The pressurization cylinder 38 applies the set pressure to ensure that the pressure is evenly transmitted throughout the entire area and maintains the pressure holding time for 3-20 seconds, so that the thermally conductive double-sided adhesive on the iron frame is fully activated and firmly bonded to the FPCA, ensuring the qualification of the backlight product.

[0048] S4: Reset and Remove Components: After the pressure holding time is over, control the pressurizing cylinder 38 to reset the urethane pressure block 41 to its initial position; turn off the vacuum generator, release the negative pressure of the array-type vacuum adsorption hole 36, and release the FPCA; control the pneumatic guide rail 25 to drive the silicone roller 30 to detach from the iron frame, and loosen the fixing bolts of the lower iron auxiliary clamp 14; manually or with a robotic arm, remove the assembled FPCA-iron frame assembly to complete one assembly process; if it is necessary to replace products of different specifications, repeat steps 1-5 to readjust the fixture.

[0049] The beneficial effects of the above technical solution are as follows: This method relies on the modular and adjustable structure of the general-purpose pressure fixture, and realizes the universal adaptation and assembly of multi-specification FPCA and iron frame through the standardized process of "pre-adjustment-positioning-pressurization-reset"; the FPCA is positioned by both shape adaptation groove and vacuum adsorption, the LED beads are effectively protected by the anti-cavity groove, the iron frame is precisely aligned by mechanical clamping and lateral thrust, and the pressurization process is guided by guide rail and buffered by urethane pressure block to avoid damage to the LED beads. At the same time, it greatly improves the changeover efficiency and reduces production costs, and is suitable for scenarios with high assembly precision requirements such as automotive backlights.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A universal assembly FPCA pressurization jig, characterized in that, comprising a universal bearing base (1), an iron frame auxiliary device (2), a positioning device (3), and a pressure maintaining device (4), the universal bearing base (1) is used for assembling and positioning various functional modules, and the universal bearing base (1) is provided with adjustable positioning hole groups suitable for installing components of different specifications, the iron frame auxiliary device (2) is detachably assembled on the table top of the universal bearing base (1), the positioning device (3) and the pressure maintaining device (4) are installed on the front side of the universal bearing base (1), and the pressure maintaining device (4) is located on the top of the positioning device (3). 2.The universal assembly FPCA pressurization jig according to claim 1, characterized in that, the iron frame auxiliary device (2) comprises a support back plate (5), an adjusting fixed block (11), an adjusting support block (12), a lower iron auxiliary positioning block (13), and a lower iron auxiliary clamping block (14), the support back plate (5) is installed on the universal bearing base (1) through a support block (6), the adjusting fixed block (11) is installed on the front side of the support back plate (5) through a bolt, the adjusting support blocks (12) are installed on the both sides of the adjusting fixed block (11), the lower iron auxiliary positioning block (13) is installed on the top of the adjusting fixed block (11) through an electric push rod (15), and two groups of lower iron auxiliary clamping blocks (14) are symmetrically and movably arranged on the top of the lower iron auxiliary positioning block (13). 3.The universal assembly FPCA pressurization jig according to claim 2, characterized in that, the rear wall of the support back plate (5) is provided with the support block (6) through a bolt, the bottom of the support block (6) is installed on the universal bearing base (1) through a bolt, the both sides of the support back plate (5) are symmetrically provided with scale lines (9), a plurality of groups of fixed clamping holes (7) and fixed clamping grooves (10) are formed in the support back plate (5), and an avoiding groove (8) is arranged on the bottom of the support back plate (5). 4.The universal assembly FPCA pressurization jig according to claim 2, characterized in that, a plurality of groups of the electric push rods (15) are fixedly sleeved with the same fixed sleeves (31), each group of the fixed sleeves (31) is installed on the bottom of the adjusting fixed block (11) through a bolt, the output end of the electric push rod (15) extends to the top of the adjusting fixed block (11) and is fixedly connected with the lower iron auxiliary positioning block (13), the adjusting fixed block (11) is provided with through fixed clamping holes (19) on the front and back sides, and the adjusting fixed block (11) is provided with fixed clamping holes (32) on the left and right sides. 5.The universal assembly FPCA pressurization jig according to claim 2, characterized in that, the adjusting support block (12) is provided with a fixed clamping groove (16), a bolt passes through the fixed clamping groove (16) and is screwed into the fixed clamping hole (32) to connect the adjusting fixed block (11) and the adjusting support block (12), the top of the lower iron auxiliary positioning block (13) is symmetrically provided with a guide sliding groove (17), and a plurality of groups of bolt holes (18) are formed in the guide sliding groove (17). 6.The universal assembly FPCA pressurization jig according to claim 5, characterized in that, ​ ​ ​ ​ ​ The lower iron auxiliary clamp block (14) comprises a lower iron clamp block sliding piece (20), a connecting block (22), and a rubber clamp block (23), the lower iron clamp block sliding piece (20) is slidingly arranged in the guide sliding groove (17), the lower iron clamp block sliding piece (20) is provided with a fixed clamping groove (21), the connecting block (22) is fixedly connected with the lower iron clamp block sliding piece (20), the connecting block (22) and the rubber clamp block (23) are provided with the same fixed clamping hole (24), and the rubber clamp block (23) is connected with the connecting block (22) through bolts.

7. The universal assembly FPCA pressurizing jig according to claim 2, characterized in that: The pneumatic guide rail (25) is installed on the universal bearing base (1), the connecting piece (26) is installed on the moving seat of the pneumatic guide rail (25) through bolts, one end of the supporting rod (27) is connected with the connecting piece (26) through bolts, the other end of the supporting rod (27) is provided with the roller fixing seat (29), the silica gel roller (30) is movably arranged on the roller fixing seat (29), and the end of the supporting rod (27) close to the roller fixing seat (29) is provided with the fixed clamping groove (28).

8. The universal assembly FPCA pressurizing jig according to claim 1, characterized in that: The positioning device (3) comprises a positioning carrier plate (33), the positioning carrier plate (33) is installed on the front side of the supporting back plate (5) through bolts, the positioning carrier plate (33) is provided with a positioning connecting groove (34), the top of the positioning carrier plate (33) is provided with an FPC shape adaptive groove (35), an array type vacuum adsorption hole (36) and an LED avoidance groove (37), the array type vacuum adsorption hole (36) is used for fixing the FPCA through negative pressure, and the LED avoidance groove (37) is used for avoiding the LED lamp beads on the FPCA.

9. The universal assembly FPCA pressurizing jig according to claim 1, characterized in that: The pressure maintaining device (4) comprises a pressurizing cylinder (38), the pressurizing cylinder (38) is fixedly arranged on the front side of the universal bearing base (1), the output end of the pressurizing cylinder (38) is fixedly provided with an aluminum block (39), the aluminum block (39) is connected with the ultra-gel pressure block (41) through the cushion block (40), the slide rail (42) is installed on the front side of the universal bearing base (1), the connecting support (44) is installed on the slide rail (42) through the sliding block (43), and the bottom of the connecting support (44) is fixedly connected with the aluminum block (39).

10. An assembly method of the FPCA for controlling the general-purpose assembly FPCA pressurizing jig according to any one of claims 1 to 9 to perform assembly, wherein The steps include: S0: jig pre-adjustment: according to the FPCA and the iron frame specifications, the supporting back plate (5), the adjusting fixed block (11), the adjusting supporting block (12) and the positioning carrier plate (33) are adjusted and fixed through the adjustable positioning hole group of the universal bearing base (1); S1: FPCA positioning: the FPCA is placed on the FPC shape adaptive groove (35) of the positioning carrier plate (33), the LED lamp beads are embedded into the LED avoidance groove (37), the vacuum generator in the universal bearing base (1) is started, and the FPCA is fixed through the array type vacuum adsorption hole (36); S2: iron frame positioning: adjust the lower iron auxiliary clamp block (14) to clamp the iron frame, the electric push rod (15) drives the lower iron auxiliary positioning block (13) to the appropriate height, the pneumatic guide rail (25) drives the silica gel roller (30) to laterally position the iron frame; S3: pressure and pressure: the pressure cylinder (38) drives the excellent glue pressure block (41) to press along the slide rail (42), and the pressure is maintained for 3-20s; S4: take out and reset: the pressure cylinder (38) and each part reset, close the vacuum, loosen the lower iron auxiliary clamp block (14), and take out the assembled part; change the specification and adjust the jig.

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