FPC warping repair device and method

Abstract

The present invention discloses an FPC warpage repair device and method, which relates to the technical field of FPC warpage repair devices. The device comprises a heating mechanism disposed within a frame, wherein a flexible clamping mechanism is disposed above the corresponding heating mechanism within the frame. The flexible clamping mechanism comprises a telescopic airbag, a connecting ring, a pressure control mechanism, a stiffness adjustment mechanism, and a plurality of driving components. The telescopic airbag is disposed within the frame above the heating mechanism. The pressure control mechanism is mounted on the frame and is used to control the internal pressure of the telescopic airbag to control the degree of expansion of the telescopic airbag, allowing the telescopic airbag to expand and cooperate with the heating mechanism to clamp the FPC. The stiffness adjustment mechanism is mounted on the bottom of the telescopic airbag and is used to adjust the clamping stiffness of the FPC. The present invention has a reasonable structure. By providing a flexible clamping mechanism, the pressure control mechanism drives the telescopic airbag to expand to varying degrees, and cooperates with the heating mechanism to clamp the FPC, thereby achieving flexible clamping of the FPC and meeting both low-rigidity bonding and high-rigidity repair requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of FPC warping repair devices, and in particular to an FPC warping repair device and method. Background Art

[0002] Flexible printed circuits (FPCs) use a flexible insulating substrate as a carrier. This substrate's flexibility allows it to bend in three dimensions, adapting to complex assembly requirements. However, irregular bends, arches, or twists (collectively referred to as warpage) in the plane can compromise assembly precision, necessitating warpage repair. However, existing FPC warpage repair devices still suffer from the following drawbacks during use:

[0003] For example, Chinese patent publication number CN106211581A discloses a device for leveling warped printed circuit boards, which is used to level warped printed circuit boards. The device includes at least one laminating film and at least two steel plates. During operation, the printed circuit board and the at least one laminating film are clamped between the at least two steel plates, and the at least one laminating film is located between the printed circuit board and one of the steel plates. The above invention also discloses a method for leveling warped printed circuit boards. Through the above device and method, the above invention can better level printed circuit boards.

[0004] The above-mentioned printed circuit board warping and leveling device is mainly based on a hot press. Its pressure head is a metal rigid body. When leveling, the entire rigid surface is pressed down at once, and the pressure distribution is extremely uneven. The FPC itself is only tens of microns thick, and the copper foil circuit and polyimide substrate are brittle and thin. Under the local high pressure of the rigid pressure head, it is very easy to suffer irreversible damage such as circuit breakage, pad warping, insulation layer cracking and even perforation. The yield drops sharply and the scrap rate rises, becoming a bottleneck restricting the mass production of high-end flexible electronics. Summary of the Invention

[0005] The purpose of this application is to provide an FPC warping repair device and method, which can effectively solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present application provides the following technical solutions: an FPC warping repair device, comprising a heating mechanism arranged in a frame, and a flexible clamping mechanism is arranged above the corresponding heating mechanism in the frame; the flexible clamping mechanism comprises: a telescopic airbag, a connecting ring, a pressure control mechanism, a stiffness adjustment mechanism and a plurality of driving members; wherein, the telescopic airbag is arranged in the frame above the heating mechanism; the connecting ring is arranged in the telescopic airbag; the distance between the connecting ring and the bottom of the telescopic airbag is greater than the thickness of the FPC; a plurality of the driving members are installed between the frame and the connecting ring, and are used to drive the connecting ring to move, so as to drive the telescopic airbag to perform a telescopic action; the pressure control mechanism is installed in the frame, and is used to control the internal pressure of the telescopic airbag, so as to control the expansion degree of the telescopic airbag, allowing the telescopic airbag to expand and cooperate with the heating mechanism to clamp the FPC; the stiffness adjustment mechanism is installed at the bottom of the telescopic airbag, and is used to adjust the clamping stiffness of the FPC.

[0007] Preferably, the pressure control mechanism includes an oil tank, a two-way oil pump, a mounting tube, and a connecting pipe; the oil tank is mounted on the frame and filled with oil, the two-way oil pump is mounted on one side of the oil tank, the telescopic airbag is mounted in the frame via the mounting tube, one end of the mounting tube is connected to the oil tank, and the other end of the mounting tube is connected to the interior of the telescopic airbag via the connecting pipe;

[0008] An oil pressure sensor is installed in the telescopic airbag.

[0009] Preferably: the stiffness adjustment mechanism includes a support adjustment layer and a plurality of adjustment bracket mechanisms; the support adjustment layer is arranged at the bottom of the telescopic airbag, and a closed cavity is formed between the bottom of the telescopic airbag and the support adjustment layer; the plurality of adjustment bracket mechanisms are arranged in the cavity and are used to adjust the size of the cavity to control the clamping stiffness of the FPC.

[0010] Preferably: the adjustment bracket mechanism includes multiple groups of rotating blocks, each group of rotating blocks includes six mutually hinged rotating blocks; a torsion spring is provided between the mutually hinged rotating blocks; when the restrictions between adjacent rotating blocks are lost, the torsion spring is used to drive the rotating blocks to rotate and reset; when the restrictions between adjacent rotating blocks are lost, the cross-section of the six mutually hinged rotating blocks forms a regular hexagon; wherein one of the two opposite rotating blocks is connected to the bottom of the telescopic airbag, and the other rotating block is connected to the support adjustment layer.

[0011] 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The through-hole comprises a screw bolt, and a nut. The through-hole comprises a screw bolt, and a nut. The through-hole comprises a screw bolt, and a nut. The two foot pieces comprise a through-hole, a screw bolt, and a nut.

[0012] The shaft sleeve is provided with a plurality of through slots, and the interior of the shaft sleeve is communicated with the interior of the telescopic airbag through the through slots.

[0013] Preferably: the driving mechanism includes a motor and a gear set; the motor is installed on the frame, and the gear set is arranged between the motor and the hexagonal shaft; one of the gears in the gear set is coaxially connected to the output end of the motor, and the other gear in the gear set is coaxially connected to the hexagonal shaft.

[0014] Preferably, a flexible buffer layer is provided on the support adjustment layer, and a plurality of protrusions that are in direct contact with the FPC are provided on the flexible buffer layer.

[0015] Preferably, a sealing protective layer is provided on the flexible buffer layer, and the sealing protective layer is a polyimide film structure;

[0016] A plurality of micro strain gauge sensors are embedded in the flexible buffer layer.

[0017] Preferably: the heating mechanism includes a heating seat, a heating table, a circulation pump and a circulation pipe; the heating seat is installed in the frame, the heating table is arranged on the heating seat, the circulation pump is installed on the heating seat, the circulation pump is connected to the inside of the heating table through the circulation pipe, and oil is arranged in the heating table; the circulation pump is used to control the circulation flow of the oil in the heating table through the circulation pipe.

[0018] A method for repairing FPC warpage, comprising the above-mentioned FPC warpage repair device, specifically comprising the following steps:

[0019] Step 1: Flexible clamping: First, place the FPC on the heating mechanism. Then, the driver drives the connecting ring to move, which in turn drives the telescopic airbag to descend and extend. At the same time, the pressure control mechanism drives oil to flow into the telescopic airbag, causing the bottom of the telescopic airbag to expand and clamp the FPC.

[0020] Step 2: Clamping stiffness control: According to the warping degree of the FPC, the clamping stiffness of the FPC is controlled by the stiffness adjustment mechanism;

[0021] Step 3: Hot pressing repair: Start the heating mechanism to perform hot pressing on the clamped FPC to release the internal stress of the FPC so that the FPC can be restored to flatness.

[0022] In summary, the technical effects and advantages of the present invention are as follows:

[0023] The present invention has a reasonable structure. By setting a flexible clamping mechanism, the pressure control mechanism drives the telescopic airbag to expand to different degrees, and cooperates with the heating mechanism to clamp the FPC, thereby achieving flexible clamping of the FPC and taking into account both low-rigidity bonding and high-rigidity repair requirements.

[0024] The present invention provides a stiffness adjustment mechanism, controls the shape of the adjustment bracket mechanism, and cooperates with a torsion spring to achieve clamping stiffness adjustment, thereby solving the problem of insufficient airbag clamping stiffness and achieving continuous stiffness adjustment to meet the needs of different FPC repair stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0027] Figure 2 It is a partially cutaway, three-dimensional, and enlarged structural schematic diagram of the present invention;

[0028] Figure 3 It is a partial three-dimensional enlarged structural diagram of the flexible clamping mechanism of the present invention;

[0029] Figure 4 It is a partially cutaway, three-dimensional, and enlarged structural diagram of the flexible clamping mechanism of the present invention;

[0030] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of area A in the middle;

[0031] Figure 6 It is a schematic diagram of a three-dimensional enlarged structure of the turntable of the present invention;

[0032] Figure 7 It is a partially cutaway, exploded, and enlarged structural diagram of the control mechanism of the present invention;

[0033] Figure 8 This is a three-dimensional enlarged structural diagram of a partial structure of the adjusting bracket mechanism of the present invention;

[0034] Figure 9 It is a three-dimensional enlarged structural schematic diagram of the heating mechanism of the present invention;

[0035] Figure 10 Flow chart of the method of the present invention.

[0036] In the figure: 1, frame; 2, flexible clamping mechanism; 21, telescopic airbag; 22, connecting ring; 23, driving member; 24, pressure control mechanism; 241, oil tank; 242, two-way oil pump; 243, mounting tube; 244, connecting pipe; 25, stiffness adjustment mechanism; 251, support adjustment layer; 252, cavity; 253, adjustment bracket mechanism; 2531, rotating block; 2532, torsion spring; 254, control mechanism; 254 1. Hexagonal shaft; 2542. Bushing; 2543. Turntable; 2544. Mounting seat; 2545. Bellows; 2546. First through hole; 2547. Second through hole; 2548. Through slot; 2549. Driving mechanism; 25491. Motor; 25492. Gear set; 255. Flexible buffer layer; 256. Bump; 3. Heating mechanism; 31. Heating seat; 32. Heating table; 33. Circulation pump; 34. Circulation pipe. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Example 1: Please refer to Figures 1-4The FPC warpage repair device shown in the figure includes a heating mechanism 3 arranged in a frame 1, and a flexible clamping mechanism 2 is arranged above the corresponding heating mechanism 3 in the frame 1; the flexible clamping mechanism 2 includes: a telescopic airbag 21, a connecting ring 22, a pressure control mechanism 24, a stiffness adjustment mechanism 25 and a plurality of driving members 23; wherein, the telescopic airbag 21 is arranged in the frame 1 above the heating mechanism 3; it can be understood that the telescopic airbag is made of oil-resistant and high-temperature resistant rubber material, which is a prior art and will not be described in detail; the connecting ring 22 is a metal ring structure and is sleeved on the telescopic airbag. airbag 21; the distance between the connecting ring 22 and the bottom of the telescopic airbag 21 is greater than the thickness of the FPC; the pressure control mechanism 24 is installed on the frame 1, and is used to control the internal pressure of the telescopic airbag 21, so as to control the expansion degree of the telescopic airbag 21, allowing the telescopic airbag 21 to expand and cooperate with the heating mechanism 3 to clamp the FPC; the stiffness adjustment mechanism 25 is installed at the bottom of the telescopic airbag 21, and is used to dynamically adjust the clamping stiffness of the FPC; multiple driving members 23 are installed between the frame 1 and the connecting ring 22, and are used to drive the connecting ring 22 to move, so as to drive the telescopic airbag 21 to perform telescopic action.

[0039] It should be noted that during operation, the driving member 23 pushes the connecting ring 22 downward, causing the telescopic airbag 21 to stretch and extend close to the FPC; oil is injected into the telescopic airbag 21 through the pressure control mechanism 24, causing its bottom to expand and cooperate with the heating mechanism 3 to clamp the FPC; the oil is a high-temperature resistant oil, which is a prior art and will not be described in detail; at the same time, the stiffness adjustment mechanism 25 adjusts the clamping stiffness according to the degree of warping of the FPC, and the heating mechanism 3 provides heat. Through flexible clamping and hot pressing, the internal stress of the FPC is released to achieve warping repair.

[0040] The flexible clamping mechanism 2 achieves flexible contact through airbag expansion, avoiding damage such as line breakage and insulation layer cracking caused by local high voltage; the driving part 23 and the pressure control mechanism 24 cooperate to control the expansion and contraction of the telescopic airbag 21, which can adapt to FPCs of different sizes and thicknesses; and the stiffness adjustment mechanism 25 realizes dynamic adjustment of stiffness, taking into account the needs of low-rigidity fitting and high-rigidity repair, solving the limitations of single flexible or rigid clamping.

[0041] See also Figure 2-Figure 4The pressure control mechanism 24 includes an oil tank 241, a two-way oil pump 242, a mounting cylinder 243 and a connecting pipe 244; the oil tank 241 is installed on the frame 1, and the oil tank 241 is filled with oil, the two-way oil pump 242 is installed on one side of the oil tank 241, and the telescopic airbag 21 is installed in the frame 1 through the mounting cylinder 243, one end of the mounting cylinder 243 is connected to the oil tank 241, and the other end of the mounting cylinder 243 is connected to the inside of the telescopic airbag 21 through the connecting pipe 244; an oil pressure sensor is installed in the telescopic airbag 21; the oil pressure sensor is embedded in the inner wall of the telescopic airbag 21, detects the internal oil pressure in real time, and transmits the signal to the controller and the two-way oil pump 242 to form a closed-loop control; it can be understood that the controller and the oil pressure sensor are both existing technologies, which are not drawn in the figure and will not be described in detail.

[0042] It should be noted that when the FPC needs to be clamped, the bidirectional oil pump 242 runs forward, pumping the oil in the oil tank 241 into the telescopic airbag 21, causing the pressure in the telescopic airbag 21 to increase and expand. The oil pressure sensor provides real-time feedback on the pressure value. If it exceeds the preset value, the controller instructs the bidirectional oil pump 242 to run in the reverse direction, pumping out some oil to reduce the pressure. Through the pumping, detection and adjustment cycle control, the expansion degree of the telescopic airbag 21 is precisely controlled to ensure that the clamping force meets the repair requirements.

[0043] Using oil as the pressure transmission medium ensures higher pressure stability, avoids pressure fluctuations caused by gas compressibility, and reduces force impact on the FPC; closed-loop control combined with a high-precision oil pressure sensor improves pressure control accuracy, can accurately match pressure for different degrees of warping, and significantly reduces the risk of overpressure damage; a bidirectional oil pump realizes bidirectional oil flow, can quickly adjust pressure, and adapt to the dynamic pressure changes during the repair process.

[0044] See also Figure 2-Figure 5 The stiffness adjustment mechanism 25 includes a support adjustment layer 251 and a plurality of adjustment bracket mechanisms 253; the support adjustment layer 251 is arranged at the bottom of the telescopic airbag 21, and a closed cavity 252 is formed between the bottom of the telescopic airbag 21 and the support adjustment layer 251; the plurality of adjustment bracket mechanisms 253 are arranged in the cavity 252 and are used to adjust the size of the cavity 252 to control the clamping stiffness of the FPC.

[0045] It should be noted that the volume and support strength of the cavity 252 are changed by adjusting the support mechanism 253: when the height of the cavity 252 is reduced, the support mechanism 253 is compressed, the distance between the support adjustment layer 251 and the bottom of the telescopic airbag 21 is reduced, and the overall rigidity is enhanced; when the height of the cavity 252 is increased, the support mechanism 253 is extended, the support adjustment layer 251 can more flexibly deform with the airbag, and the overall rigidity is reduced.

[0046] It breaks through the limitation of the single stiffness of the traditional telescopic airbag 21. Through the cooperation of the cavity 252 and the adjustment bracket mechanism 253, the stiffness can be continuously adjusted to meet the needs of different FPC repair stages; the support adjustment layer 251 serves as the intermediate contact layer to avoid direct friction between the airbag and the FPC, reduce the risk of surface scratches, and enhance the uniformity of pressure transmission.

[0047] See also Figure 2-Figure 5 and Figure 8 The adjusting bracket mechanism 253 includes multiple groups of rotating blocks 2531, each group of rotating blocks 2531 includes six mutually hinged rotating blocks 2531; a torsion spring 2532 is arranged between the mutually hinged rotating blocks 2531; when the restrictions between adjacent rotating blocks 2531 are lost, the torsion spring 2532 is used to drive the rotating blocks 2531 to rotate and reset; when the restrictions between adjacent rotating blocks 2531 are lost, the cross-section of the six mutually hinged rotating blocks 2531 forms a regular hexagon; one of the two opposite rotating blocks 2531 is connected to the bottom of the telescopic airbag 21, and the other rotating block 2531 is connected to the supporting adjustment layer 251.

[0048] It should be noted that in the natural state, the elastic force of the torsion spring 2532 causes the six rotating blocks 2531 to maintain a regular hexagon, and at this time the stiffness of the support adjustment layer 251 is relatively low. When the driving member 23 drives the telescopic airbag 21 downward, it cooperates with the heating mechanism 3 to squeeze the FPC downward, causing the pressure in the cavity 252 to increase, and the bottom of the telescopic airbag 21 and the support adjustment layer 251 to move closer to each other, squeezing the rotating blocks 2531 to rotate against the elastic force of the torsion spring, compressing the regular hexagonal structure and increasing the overall stiffness. Conversely, when the pressure in the cavity 252 decreases, the torsion spring 2532 drives the rotating blocks to return to their original position, and the stiffness decreases.

[0049] The regular hexagonal structure has high stability and can evenly disperse pressure to avoid deformation of the bracket caused by local stress concentration; the torsion spring 2532 provides a reset force, making the stiffness adjustment reversible, and the stiffness state can be dynamically switched during the repair process.

[0050] See also Figure 2-Figure 7, the stiffness adjustment mechanism 25 also includes a regulating mechanism 254; the regulating mechanism 254 includes a hexagonal shaft 2541, a sleeve 2542, a turntable 2543, a mounting seat 2544, a driving mechanism 2549 and a plurality of bellows 2545; the hexagonal shaft 2541 is rotatably connected to the frame 1 around its axis, the sleeve 2542 is adaptively arranged on the hexagonal shaft 2541, the turntable 2543 is fixed on the end of the sleeve 2542 away from the hexagonal shaft 2541, and a plurality of mounting seats 2544 are arranged on the inner wall of the bottom end of the telescopic airbag 21, and the mounting seat 2544 is connected to the telescopic airbag 21 through the bellows 2545; a plurality of first through holes 2546 are opened on the turntable 2543, and a plurality of first through holes 2546 are opened on the mounting seat 2544 The through hole 2546 is matched with the second through hole 2547, and the second through hole 2547 is connected to the cavity 252 through the bellows 2545; when the turntable 2543 rotates so that the first through hole 2546 and the second through hole 2547 are aligned, the interior of the telescopic airbag 21 is connected to the cavity 252 through the first through hole 2546, the second through hole 2547 and the bellows 2545; the driving mechanism 2549 is installed on the frame 1, and the output end of the driving mechanism 2549 is connected to the hexagonal shaft 2541; the driving mechanism 2549 is used to drive the hexagonal shaft 2541 to rotate around its axis; a plurality of through slots 2548 are provided on the shaft sleeve 2542, and the interior of the shaft sleeve 2542 is connected to the interior of the telescopic airbag 21 through the through slots 2548.

[0051] It should be noted that the driving mechanism 2549 drives the hexagonal shaft 2541 to rotate, and drives the turntable 2543 to rotate synchronously through the shaft sleeve 2542: when the first through hole 2546 and the second through hole 2547 are aligned, the oil in the telescopic airbag 21 enters the cavity 252 through the first through hole 2546, the second through hole 2547 and the bellows 2545, causing the pressure in the cavity 252 to increase and expand, thereby driving the rotating block 2531 to overcome the elastic force of the torsion spring and rotate, so that the regular hexagonal structure becomes a rectangular structure, wherein two groups of adjacent rotating blocks 2531 rotate 180 degrees, and the length direction of the two groups of adjacent rotating blocks 2531 is parallel to the pressure direction on the FPC, that is, at this time, the clamping stiffness of the FPC is maximum; when the turntable 2543 rotates to the point where the through holes are misaligned, the oil cannot enter the bellows 2545, and the bracket mechanism 253 is adjusted to maintain the current stiffness;

[0052] Through the cooperation between the hexagonal shaft 2541 and the sleeve 2542, torque is transmitted and the sleeve is allowed to slide axially to adapt to the telescopic movement of the telescopic airbag 21; the bellows 2545 can undergo a certain degree of bending and expansion without affecting the expansion and deformation of the bottom of the telescopic airbag 21, so as to adapt to the flexible clamping of the FPC.

[0053] See also Figure 7It can be understood that the present application does not limit the specific structure and installation method of the driving mechanism 2549. The following only provides a feasible technical solution; the driving mechanism 2549 includes a motor 25491 and a gear set 25492; the motor 25491 is installed on the frame 1, and the gear set 25492 is arranged between the motor 25491 and the hexagonal shaft 2541; one of the gears in the gear set 25492 is coaxially connected to the output end of the motor 25491, and the other gear in the gear set 25492 is coaxially connected to the hexagonal shaft 2541.

[0054] It should be noted that when the motor 25491 is running, the driving gear drives the driven gear to rotate, and the power is transmitted to the hexagonal shaft 2541 through gear meshing, driving it to rotate around the axis; the closed-loop control of the motor 25491 can accurately control the rotation angle of the hexagonal shaft 2541, ensuring that the first through hole 2546 of the turntable 2543 and the second through hole 2547 of the mounting seat 2544 are precisely aligned.

[0055] See also Figure 3-Figure 5 A flexible buffer layer 255 is provided on the support adjustment layer 251 , and a plurality of bumps 256 that are in direct contact with the FPC are provided on the flexible buffer layer 255 .

[0056] It should be noted that the flexible buffer layer 255 is made of silicone, which is an existing technology and will not be described in detail. The elastic deformation of the flexible buffer layer 255 itself can absorb local pressure peaks and avoid damage to the FPC caused by rigid contact; the bumps 256 form point contact by reducing the contact area, thereby increasing the local pressure under the same clamping force, ensuring that the FPC fits tightly with the heating mechanism 3, especially for the micro-warping area, to enhance the heat transfer efficiency.

[0057] Example 2: This example differs from Example 1 in that: Figure 3-Figure 5 A sealing protective layer is provided on the flexible buffer layer 255, and the sealing protective layer is a polyimide film structure; the polyimide film structure has the characteristics of high temperature resistance and aging resistance, and at the same time prevents the silicone layer from adhering to the FPC surface. It is a prior art and is not shown in the figure and will not be described in detail; a plurality of micro strain gauge sensors are embedded in the flexible buffer layer 255; it can be understood that the micro strain gauge sensor is a prior art and is not shown in the figure and will not be described in detail; a plurality of micro strain gauge sensors are evenly embedded in the flexible buffer layer 255, and are connected to the controller through wires to detect the strain value of the buffer layer in real time to reflect the pressure distribution.

[0058] It should be noted that during the FPC repair process, the strain of the flexible buffer layer 255 is positively correlated with the applied pressure. The microstrain gauge sensor converts the strain signal into an electrical signal, and the controller calculates the pressure distribution on the FPC surface. If the pressure in a certain area exceeds a preset range, the pressure control mechanism 24 is instructed to reduce the pressure in that area.

[0059] See also Figure 1-Figure 2 and Figure 9 It can be understood that the present application does not limit the specific structure and installation method of the heating mechanism 3. The following only provides a feasible technical solution; the heating mechanism 3 includes a heating seat 31, a heating platform 32, a circulation pump 33 and a circulation pipe 34; the heating seat 31 is installed in the frame 1, the heating platform 32 is arranged on the heating seat 31, the circulation pump 33 is installed in the heating seat 31, the circulation pump 33 is connected to the inside of the heating platform 32 through the circulation pipe 34, and oil is provided in the heating platform 32; the circulation pump 33 is used to control the circulation of oil in the heating platform 32 through the circulation pipe 34.

[0060] It should be noted that a circulating pump 33 and a circulating pipe 34 cooperate to circulate the heated oil internally. Multiple temperature sensors and flow control valves are installed within the heating platform 32. These temperature sensors and flow control valves are conventional technology and are not shown in the figure, so they will not be described in detail. Based on the temperature data fed back by the temperature sensors, the flow control valves in each area are controlled and adjusted to precisely control the flow of oil in different areas of the heating platform 32. This dynamically compensates for temperature differences, ensuring a uniform temperature distribution on the surface of the heating platform 32 and consistent heating of the FPC.

[0061] See also Figures 1-10 A method for repairing FPC warpage, comprising the above-mentioned FPC warpage repair device, specifically comprising the following steps:

[0062] Step 1: Flexible clamping: First, place the FPC on the heating mechanism 3. Then, the driving member 23 drives the connecting ring 22 to move, thereby driving the telescopic airbag 21 to descend and extend. At the same time, the pressure control mechanism 24 drives oil to flow into the telescopic airbag 21, causing the bottom of the telescopic airbag 21 to expand and clamp the FPC.

[0063] Step 2: Clamping stiffness control: According to the degree of warping of the FPC, the clamping stiffness of the FPC is controlled by the stiffness adjustment mechanism 25;

[0064] Step 3: Hot pressing repair: Start the heating mechanism 3 to perform hot pressing on the clamped FPC to release the internal stress of the FPC so that the FPC can be restored to be flat.

[0065] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An FPC warping repair device, comprising a heating mechanism (3) disposed in a frame (1), characterized in that: A flexible clamping mechanism (2) is provided above the corresponding heating mechanism (3) in the frame (1); the flexible clamping mechanism (2) comprises: a telescopic airbag (21), a connecting ring (22), a plurality of driving members (23), a pressure control mechanism (24) and a stiffness adjustment mechanism (25); wherein the telescopic airbag (21) is provided in the frame (1) above the heating mechanism (3); the connecting ring (22) is sleeved on the telescopic airbag (21); the distance between the connecting ring (22) and the bottom of the telescopic airbag (21) is greater than the thickness of the FPC; the plurality of driving members (23) are installed between the frame (1) and the connecting ring (22) and are used to drive the connecting ring (22) to move so as to drive the The telescopic airbag (21) performs a telescopic action; the pressure control mechanism (24) is installed on the frame (1) and is used to control the internal pressure of the telescopic airbag (21) to control the expansion degree of the telescopic airbag (21), allowing the telescopic airbag (21) to expand and cooperate with the heating mechanism (3) to clamp the FPC; the pressure control mechanism (24) includes an oil tank (241), a two-way oil pump (242), a mounting tube (243) and a connecting pipe (244); the oil tank (241) is installed on the frame (1), and the oil tank (241) is filled with oil, the two-way oil pump (242) is installed on one side of the oil tank (241), and the telescopic airbag (21) is installed on the frame (1) through the mounting tube (243). 1), one end of the mounting tube (243) is communicated with the oil tank (241), and the other end of the mounting tube (243) is communicated with the inside of the telescopic airbag (21) through a connecting pipe (244); an oil pressure sensor is installed in the telescopic airbag (21); the stiffness adjustment mechanism (25) is installed at the bottom of the telescopic airbag (21) and is used to adjust the clamping stiffness of the FPC; the stiffness adjustment mechanism (25) includes a support adjustment layer (251) and a plurality of adjustment bracket mechanisms (253); the support adjustment layer (251) is arranged at the bottom of the telescopic airbag (21), and a closed cavity (252) is formed between the bottom of the telescopic airbag (21) and the support adjustment layer (251); the plurality of adjustment bracket mechanisms (253) are arranged at the bottom of the telescopic airbag (21), and a closed cavity (252) is formed between the bottom of the telescopic airbag (21) and the support adjustment layer (251); The bracket mechanism (253) is arranged in the cavity (252) and is used to adjust the size of the cavity (252) to control the clamping stiffness of the FPC; the adjusting bracket mechanism (253) includes multiple groups of rotating blocks (2531), each group of rotating blocks (2531) includes six rotating blocks (2531) that are hinged to each other; a torsion spring (2532) is provided between the rotating blocks (2531) that are hinged to each other; when the restrictions between adjacent rotating blocks (2531) are lost, the torsion spring (2532) is used to drive the rotating blocks (2531) to rotate and reset; when the restrictions between adjacent rotating blocks (2531) are lost, the cross-section of the six rotating blocks (2531) that are hinged to each other forms a regular hexagon;One of the two opposing rotating blocks (2531) is connected to the bottom of the telescopic airbag (21), and the other rotating block (2531) is connected to the support adjustment layer (251); the stiffness adjustment mechanism (25) further includes a regulating mechanism (254); the regulating mechanism (254) includes a hexagonal shaft (2541), a shaft sleeve (2542), a rotating disk (2543), a mounting seat (2544), a driving mechanism (2549), and a plurality of bellows ( 2545); the hexagonal shaft (2541) is connected to the frame (1) by rotating around its axis, the shaft sleeve (2542) is adapted to be matched with the hexagonal shaft (2541), the turntable (2543) is fixed on the shaft sleeve (2542) at one end away from the hexagonal shaft (2541), the mounting seat (2544) is provided on the inner wall of the bottom end of the telescopic airbag (21), and the mounting seat (2544) is connected to the telescopic airbag (21) through the bellows (2545); the turntable (2543) is fixed on the end of the shaft sleeve (2542) away from the hexagonal shaft (2541), and the mounting seat (2544) is connected to the telescopic airbag (21) through the bellows (2545); A plurality of first through holes (2546) are provided, and a plurality of second through holes (2547) adapted to the first through holes (2546) are provided on the mounting seat (2544), and the second through holes (2547) are communicated with the cavity (252) through the bellows (2545); when the turntable (2543) rotates so that the first through holes (2546) and the second through holes (2547) are aligned, the interior of the telescopic airbag (21) is opened through the first through holes (2546), the second through holes (2547) and the second through holes (2548). 7) and the bellows (2545) are connected to the cavity (252); the driving mechanism (2549) is installed on the frame (1), and the output end of the driving mechanism (2549) is connected to the hexagonal shaft (2541); the driving mechanism (2549) is used to drive the hexagonal shaft (2541) to rotate around its axis; the shaft sleeve (2542) is provided with a plurality of through slots (2548), and the interior of the shaft sleeve (2542) is connected to the interior of the telescopic airbag (21) through the through slots (2548).

2. The FPC warping repair device according to claim 1, characterized in that: The driving mechanism (2549) comprises a motor (25491) and a gear set (25492); the motor (25491) is mounted on the frame (1), and the gear set (25492) is arranged between the motor (25491) and the hexagonal shaft (2541); one of the gears in the gear set (25492) is coaxially connected to the output end of the motor (25491), and the other gear in the gear set (25492) is coaxially connected to the hexagonal shaft (2541).

3. The FPC warping repair device according to claim 1, characterized in that: A flexible buffer layer (255) is provided on the support adjustment layer (251), and a plurality of protrusions (256) that are in direct contact with the FPC are provided on the flexible buffer layer (255).

4. The FPC warping repair device according to claim 3, characterized in that: A sealing protection layer is provided on the flexible buffer layer (255), and the sealing protection layer is a polyimide film structure.

5. The FPC warping repair device according to claim 3, characterized in that: A plurality of micro strain gauge sensors are embedded in the flexible buffer layer (255).

6. A method for repairing FPC warpage, characterized in that: The FPC warping repair device according to any one of claims 1 to 5 comprises the following steps: Step 1: Flexible clamping: First, the FPC is placed on the heating mechanism (3), and then the connecting ring (22) is driven to move by the driving member (23), thereby driving the telescopic airbag (21) to descend and extend, and at the same time, the oil is driven to flow into the telescopic airbag (21) through the pressure control mechanism (24), so that the bottom of the telescopic airbag (21) expands and clamps the FPC; Step 2: Clamping stiffness control: According to the warping degree of the FPC, the clamping stiffness of the FPC is controlled by the stiffness adjustment mechanism (25); Step 3: Hot pressing repair: Start the heating mechanism (3) to perform hot pressing on the clamped FPC to release the internal stress of the FPC so that the FPC can be restored to be flat.

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