A fully automatic welding machine

Abstract

A fully automatic welding machine, relating to the field of welding equipment technology, includes an alignment and pressure welding unit. The alignment and pressure welding unit comprises a stage, a clamping mechanism, a vision positioning mechanism, an alignment mechanism, and a welding mechanism. The clamping mechanism presses the combination of the main FPC and the backlight FPC onto the stage. The vision positioning mechanism captures images of the pins and pads to obtain positional deviations. The alignment mechanism includes a clamping component and X-axis, Y-axis, and Z-axis drive modules. The clamping component clamps the pins and is driven independently by the three-axis drive modules to compensate for positional deviations, ensuring precise alignment between the pins and pads. The welding mechanism performs welding directly after alignment. This solution achieves precise alignment of small, flexible pins by directly gripping the pins with the clamping component and performing independent three-axis fine-tuning. Existing welding equipment struggles to perform independent, multi-degree-of-freedom fine adjustments to the pins, leading to low pin-pad alignment accuracy and numerous welding defects. This solution significantly improves alignment accuracy and welding quality.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and specifically to a fully automatic welding machine. Background Technology

[0002] During the production of the backlight module, the backlight FPC and the main FPC need to be soldered together to achieve electrical connection. The backlight FPC has pins, and the main FPC has corresponding pads. Before soldering, the pins and pads must be precisely aligned.

[0003] In existing fully automated soldering equipment, alignment typically involves visual recognition followed by overall movement of the backlit FPC or mechanical stops to push the pins. However, the pins of the backlit FPC are small and flexible, making them prone to warping, skew, or slight twisting. Traditional overall movement or mechanical pushing methods can only correct the position of the backlit FPC as a whole, and cannot make independent fine adjustments to the local posture of the pins in the X, Y, and Z directions. This makes it difficult to achieve precise alignment between the pins and the pads, resulting in soldering defects such as cold solder joints, solder bridges, and misalignment, which affect product yield.

[0004] Therefore, there is an urgent need for a fully automated welding machine that can independently and with multiple degrees of freedom finely adjust the pins of the backlight FPC in order to improve alignment accuracy and welding quality. Summary of the Invention

[0005] The purpose of this application is to provide a fully automatic welding machine to solve the problem that existing welding equipment is difficult to make independent, multi-degree-of-freedom fine adjustments to the pins, resulting in low pin-pad alignment accuracy and many welding defects.

[0006] The technical solution adopted in this invention is: a fully automatic welding machine, including a positioning pressure welding unit, wherein the positioning pressure welding unit includes: The platform is used to support the assembly of the main FPC and the backlight FPC to be welded. A pressing mechanism, which can be raised, lowered and slidably disposed above the platform, is used to press the combination of the main FPC and the backlight FPC onto the platform. A visual positioning mechanism, located above the stage, includes at least one CCD camera for capturing images of the pins of the backlight FPC and the pads of the main FPC to obtain the positional deviation between the pins and the pads. The alignment mechanism includes a clamping component, an X-axis drive module, a Y-axis drive module, and a Z-axis drive module. The clamping component is used to clamp the pins of the backlight FPC. The X-axis drive module, Y-axis drive module, and Z-axis drive module are used to drive the clamping component to move along the X-axis, Y-axis, and Z-axis directions, respectively, to compensate for the positional deviation between the pins and the pads, so that the pins are precisely aligned with the pads. The welding mechanism is movable and positioned above the platform. The welding mechanism has a pressure welding head, which is used to weld the pin and the pad after they are aligned.

[0007] Optionally, the alignment mechanism further includes a support base, a first sliding frame slidably disposed on the support base, a second sliding frame slidably disposed on the first sliding frame, and a lifting seat that can be raised and lowered on the second sliding frame. The platform is fixedly disposed on the support base, and the first sliding frame, the second sliding frame, and the lifting seat are all located below the platform. The clamping assembly is disposed on the lifting seat. The X-axis drive module is disposed on the support base and is used to drive the first sliding frame to slide along the X-axis direction. The Y-axis drive module is disposed on the first sliding frame and is used to drive the second sliding frame to slide along the Y-axis direction. The Z-axis drive module is disposed on the second sliding frame and is used to drive the lifting seat to slide along the Z-axis direction.

[0008] Optionally, the clamping assembly includes a first clamping arm fixedly mounted on the lifting seat, a second clamping arm mounted on the lifting seat, and a clamping cylinder. The first clamping arm and the second clamping arm cooperate to form a clamping gap for clamping the pin. The piston rod of the clamping cylinder is fixedly connected to the second clamping arm and is used to drive the second clamping arm to move toward or away from the first clamping arm to clamp or release the pin.

[0009] Optionally, the clamping mechanism includes a mounting bracket fixedly mounted on a support, a sliding seat slidably mounted on the mounting bracket, a clamping rod liftably mounted on the sliding seat, a clamping block fixedly mounted on the clamping rod, a first clamping drive for driving the sliding seat to slide along the X-axis, and a second clamping drive for driving the clamping rod to move along the Z-axis. The mounting bracket is located on one side of the platform, the end of the clamping rod away from the sliding seat extends onto the platform, and the clamping block is located at the end of the clamping rod extending onto the platform and is used to clamp the main FPC onto the platform.

[0010] Optionally, the mounting bracket is provided with a cleaning box, and the cleaning box is provided with a cleaning brush for cleaning the pressure welding head of the welding mechanism.

[0011] Optionally, the fully automatic welding machine further includes a frame, on which a fixed frame is provided. The alignment and pressure welding unit further includes a platform driving module for driving the platform to move. The vision positioning mechanism and the welding mechanism are respectively located on both sides of the fixed frame relative to the Y-axis direction. The cleaning box is located on the side of the platform facing the fixed frame. The platform driving module is used to drive the platform to move relative to the frame along the Y-axis direction, so that the platform first moves to below the vision positioning mechanism and then moves to below the welding mechanism.

[0012] Optionally, the alignment and pressure welding unit further includes a striker valve disposed on a fixed frame. The striker valve is disposed on the same side as the vision positioning mechanism and is used to apply flux to the pads of the main FPC.

[0013] Optionally, the fully automatic welding machine further includes a feeding unit, a first transfer unit, a turntable unit, a second transfer unit, and a unloading unit; The feeding unit is used to supply the assembly of the main FPC and the backlight FPC to be welded to the preset feeding position; The first transfer unit is used to transfer the assembly of the main FPC and the backlight FPC to be welded to the alignment and pressure welding unit, and to transfer the assembly of the main FPC and the backlight FPC that has been welded to the turntable unit; The turntable unit includes an intermittently rotatable turntable, on which a loading station, a solder joint cleaning station, an AOI inspection station, a protective adhesive application station, and a unloading station are sequentially arranged along its circumference. The turntable unit also includes a solder joint cleaning mechanism corresponding to the solder joint cleaning station, an AOI inspection mechanism corresponding to the AOI inspection station, and a protective adhesive application mechanism corresponding to the protective adhesive application station. The solder joint cleaning mechanism is used to clean the solder joints after the pins and pads are soldered, the AOI inspection mechanism is used to inspect the soldering quality of the solder joints, and the protective adhesive application mechanism is used to apply protective adhesive to the solder joints. The second transfer unit is used to transfer the product located at the unloading station to the unloading unit, and the unloading unit performs unloading and conveying of the product.

[0014] Optionally, the fully automatic welding machine also includes a defective product unloading line; When the AOI inspection mechanism detects a welding defect, the protective adhesive application mechanism does not apply adhesive to the defective product. The defective product rotates with the turntable to the unloading station, and the second transfer unit transfers the defective product located at the unloading station to the defective product unloading line. When the AOI inspection mechanism detects a welded product that is in good condition, the protective adhesive application mechanism applies adhesive to the product. The product then rotates with the turntable to the unloading station, and the second transfer unit transfers the product located at the unloading station to the unloading unit.

[0015] Optionally, the fully automatic welding machine further includes a positioning unit located between the feeding unit and the first transfer unit, the positioning unit being used to position the assembly of the main FPC and the backlight FPC to be welded supplied by the feeding unit. When the feeding unit supplies the assembly of the main FPC and the backlight FPC to be welded to the preset feeding position, the first transfer unit transfers the assembly of the main FPC and the backlight FPC to the positioning unit, and positions it. After positioning is completed, the first transfer unit then transfers the positioned assembly of the main FPC and the backlight FPC to the alignment and pressure welding unit.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are as follows: This application provides a fully automatic welding machine. During welding, the main FPC and backlight FPC assembly is first clamped and fixed on the platform by a clamping mechanism. A vision positioning mechanism captures images of the pins of the backlight FPC and the pads of the main FPC to obtain the positional deviation between the pins and the pads. Subsequently, a clamping assembly clamps the pins of the backlight FPC. The X-axis drive module, Y-axis drive module, and Z-axis drive module drive the clamping assembly to move independently in the X, Y, and Z directions according to the positional deviation, accurately compensating for the positional deviation between the pins and the pads, so that the pins and pads are precisely aligned. Finally, the welding head of the welding mechanism welds the aligned pins and pads. Compared with the prior art, this application uses a clamping component to grasp the pin and a three-axis drive module to perform independent multi-degree-of-freedom fine compensation for the positional deviation between the pin and the pad. This can effectively overcome the alignment error caused by local deformation of the pin. During the adjustment of the pin position, the clamping component moves the pin from below the pad to above the pad and abuts against the pad, achieving high-precision alignment between the pin and the pad. This significantly reduces soldering defects such as cold solder joints, solder bridging, and misalignment, and improves product yield and soldering stability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this embodiment; Figure 2 This is a schematic diagram illustrating the cooperation relationship between the platform, clamping mechanism, vision positioning mechanism, alignment mechanism, welding mechanism, platform drive module, impact valve, and fixing frame in this embodiment. Figure 3 yes Figure 2 Another perspective view; Figure 4This is a schematic diagram illustrating the positional relationship between the stage, the main FPC and the backlight FPC assembly, the clamping assembly, the cleaning box, and the cleaning brush in this embodiment. Figure 5 This is a schematic diagram illustrating the cooperation relationship between the platform, the clamping mechanism, the bearing seat, the first sliding frame, the second sliding frame, and the lifting seat in this embodiment; Figure 6 yes Figure 5 Enlarged view of section A; Figure 7 This is a schematic diagram illustrating the cooperation relationship between the clamping mechanism, the X-axis drive module, the Y-axis drive module, and the Z-axis drive module in this embodiment; Figure 8 Figure 7 Another perspective view; Figure 9 This is a diagram illustrating the clamping mechanism in this embodiment; Figure 10 This is a schematic diagram illustrating the cooperation relationship between the fixing frame, the visual positioning mechanism, and the firing pin valve in this embodiment; Figure 11 This is a schematic diagram illustrating the cooperation relationship between the feeding unit, the positioning unit, the first transfer frame a, the first transfer frame b, and the first transfer transfer platform in this embodiment; Figure 12 This is a partial view of the feeding unit in this embodiment; Figure 13 This is a diagram illustrating the positioning unit in this embodiment; Figure 14 This is a schematic diagram illustrating the cooperative relationship between the turntable unit, the second transfer unit, the unloading unit, and the defective product unloading line in this embodiment; Figure 15 This is a diagram illustrating the turntable unit in this embodiment; Figure 16 This is a diagram illustrating the solder joint cleaning mechanism in this embodiment; Figure 17 This is a diagram illustrating the AOI detection mechanism in this embodiment; Figure 18 This is a diagram illustrating the protective adhesive application mechanism in this embodiment; Figure 19 This is a schematic diagram illustrating the coordination relationship between the second transfer unit, the unloading unit, and the defective product unloading line in this embodiment.

[0019] Reference numerals: 100, Alignment and bonding unit; 10, Stage; 11, Assembly of main FPC and backlight FPC; 111, Pad; 112, Pin; 20, Clamping mechanism; 21, Mounting bracket; 211, Cleaning box; 212, Cleaning brush; 22, Sliding seat; 23, Clamping rod; 24, Clamping block; 25, First clamping drive; 26, Second clamping drive; 30, Vision positioning mechanism; 31, CCD camera; 40, Alignment mechanism; 41, Clamping assembly; 411, First clamping arm; 412, Second clamping arm; 413, Clamping cylinder; 414, Clamping gap; 42, X-axis drive module; 43, Y-axis drive module; 44, Z-axis drive module; 45 46. ​​Support seat; 47. First sliding frame; 48. Second sliding frame; 50. Lifting seat; 51. Welding mechanism; 60. Pressure welding head; 70. Platform drive module; 80. Impact pin valve; 200. Frame; 210. Fixed frame; 300. Feeding unit; 301. Preset feeding position; 310. Feeding conveyor line; 320. Feeding blocking assembly; 321. Blocking component; 3211. Blocking frame; 3212. Blocking rod; 3213. Blocking roller; 322. Blocking drive cylinder; 400. First transfer unit; 410. First transfer frame a; 420. First transfer frame b; 430. First transfer transfer platform; 440. First transfer suction cup assembly a; 450. First transfer suction cup Component b; 500, Turntable Unit; 510, Turntable; 511, Loading Station; 512, Solder Joint Cleaning Station; 513, AOI Inspection Station; 514, Protective Adhesive Application Station; 515, Unloading Station; 520, Solder Joint Cleaning Mechanism; 521, Solder Joint Cleaning Frame; 522, Paper Feeding Roller; 523, Paper Receiving Roller; 524, Cleaning Paper; 525, Guide Roller; 526, Cleaning Area; 527, First Cleaning Drive Module; 528, Second Cleaning Drive Module; 530, AOI Inspection Mechanism; 531, AOI Inspection Frame; 532, AOI Inspection Camera; 533, AOI Three-Axis Drive Module; 540, Protective Adhesive Application Mechanism; 541, Protective Adhesive Application Bracket; 54 2. Adhesive application robot; 543. Protective adhesive application three-axis drive module; 544. Protective adhesive supply assembly; 600. Second transfer unit; 610. Second transfer frame; 620. Second suction cup assembly; 630. Second transfer drive module a; 640. Second transfer drive module b; 700. Unloading unit; 710. Unloading conveyor line; 800. Positioning unit; 810. Positioning sliding frame; 820. Positioning support; 830. First positioning sliding seat; 840. First positioning post; 850. Second positioning sliding seat; 860. Second positioning post; 870. Positioning drive module; 880. First positioning drive component; 890. Second positioning drive component; 900. Defective product unloading line. Detailed Implementation

[0020] The following will refer to the appendices in the embodiments of the present invention. Figures 1-19 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] This embodiment provides a fully automatic welding machine, see reference. Figures 1-19 The assembly includes a positioning and pressure welding unit 100, which includes a stage 10, a clamping mechanism 20, a vision positioning mechanism 30, an alignment mechanism 40, and a welding mechanism 50. The stage 10 is used to support the assembly 11 of the main FPC and the backlight FPC to be welded, providing a stable working plane for subsequent operations. At this time, the backlight FPC has been attached to the back of the main FPC, and the pins 112 of the backlight FPC extend from the bottom side of the main FPC and extend to the bottom of the pads 111 of the main FPC. The clamping mechanism 20 is vertically and slidably disposed above the stage 10. It is used to stably press the assembly 11 of the main FPC and the backlight FPC onto the surface of the stage 10 during alignment and welding, preventing it from shifting during adjustment or welding and ensuring process stability. The visual positioning mechanism 30 is located above the stage 10 and includes at least one CCD camera 31 for capturing images of the pins 112 of the backlight FPC and the pads 111 of the main FPC to obtain the positional deviation between the pins 112 and the pads 111. The alignment mechanism 40 includes a clamping assembly 41, an X-axis drive module 42, a Y-axis drive module 43, and a Z-axis drive module 44. The clamping assembly 41 is used to clamp the pins 112 of the backlight FPC. The X-axis drive module 42, the Y-axis drive module 43, and the Z-axis drive module 44 are used to drive the clamping assembly 41 to move along the X-axis, Y-axis, and Z-axis directions, respectively. The X-axis and Y-axis drive modules are used to compensate for the positional deviation of the pins 112 in the plane, and the Z-axis drive module 44 is used to adjust the positional deviation of the pins 112 in the height direction so that they achieve an ideal contact posture with the surface of the pads 111, thereby achieving precise alignment between the pins 112 and the pads 111. The welding mechanism 50 is raised and lowered above the platform 10. The welding mechanism 50 has a pressure welding head 51. When the pin 112 and the pad 111 are fully aligned by the alignment mechanism 40, the welding mechanism 50 is lowered, and the pressure welding head 51 applies pressure to the contact area of ​​the pin 112 and the pad 111 and heats it by electricity to complete the welding.

[0024] During soldering, the clamping mechanism 20 fixes the assembly 11 of the main FPC and the backlight FPC onto the stage 10 to prevent displacement during soldering. The vision positioning mechanism 30 obtains the precise positional deviation between the pins 112 and the pads 111. The clamping assembly 41 directly grips the pins 112 of the backlight FPC, and the X, Y, and Z axis drive module performs independent multi-degree-of-freedom fine adjustments to the pins 112, effectively compensating for alignment errors caused by warping, skewness, and slight torsion due to the pins' small size and flexibility. During the adjustment of the pins 112's position, the clamping assembly 41 moves the pins 112 from below the pads 111 to above them, abutting against the pads 111, achieving high-precision alignment between the pins 112 and the pads 111. Finally, the soldering mechanism 50 applies pressure and heats the contact area between the aligned pins 112 and the pads 111 to complete the soldering process. Compared with the prior art, this application directly grips the pin 112 through the clamping component 41 and uses a three-axis drive module to perform independent multi-degree-of-freedom fine compensation for the positional deviation between the pin 112 and the pad 111. This can effectively overcome the alignment error caused by the local deformation of the pin 112, achieve high-precision alignment between the pin 112 and the pad 111, thereby significantly reducing welding defects such as cold solder joints, bridging, and misalignment, and improving product yield and welding stability.

[0025] Furthermore, the alignment mechanism 40 also includes a support base 45, a first sliding frame 46 slidably disposed on the support base 45, a second sliding frame 47 slidably disposed on the first sliding frame 46, and a lifting seat 48 that can be raised and lowered on the second sliding frame 47. The platform 10 is fixedly disposed on the support base 45. The first sliding frame 46, the second sliding frame 47, and the lifting seat 48 are all located below the platform 10. The clamping assembly 41 is disposed on the lifting seat 48. The X-axis drive module 42 is disposed on the support base 45 and is used to drive the first sliding frame 46 to slide along the X-axis direction. The Y-axis drive module 43 is disposed on the first sliding frame 46 and is used to drive the second sliding frame 47 to slide along the Y-axis direction. The Z-axis drive module 44 is disposed on the second sliding frame 47 and is used to drive the lifting seat 48 to slide along the Z-axis direction.

[0026] Understandably, by arranging the X-axis drive module 42, Y-axis drive module 43, and Z-axis drive module 44 in layers below the stage 10, the structure is compact, saving operating space above the stage 10. The X-axis drive module 42 drives the first sliding frame 46, the Y-axis drive module 43 drives the second sliding frame 47, and the Z-axis drive module 44 drives the lifting seat 48. The three are independent of each other, which can realize the precise linkage or independent movement of the clamping component 41 in the X, Y, and Z directions, thereby flexibly compensating for the three-dimensional positional deviation between the pin 112 and the pad 111.

[0027] In one specific implementation, the support base 45 and the first sliding frame 46, the first sliding frame 46 and the second sliding frame 47, and the second sliding frame 47 and the lifting base 48 are all slidably connected by guide rails and sliders. The X-axis drive module 42, Y-axis drive module 43, and Z-axis drive module 44 are all lead screw motor modules. Lead screw motor modules are a well-known technology in the art and will not be described in detail here. In some other embodiments, the X-axis drive module 42, Y-axis drive module 43, and Z-axis drive module 44 may also be selected from other drive structures such as cylinders, linear motors, or synchronous belt transmission mechanisms, depending on the actual situation. As long as they can stably drive the corresponding components to move smoothly along the preset direction and meet the position adjustment accuracy requirements, this application does not limit the specific type of drive module.

[0028] Furthermore, the clamping assembly 41 includes a first clamping arm 411 fixedly mounted on the lifting seat 48, a second clamping arm 412 mounted on the lifting seat 48, and a clamping cylinder 413. The first clamping arm 411 and the second clamping arm 412 cooperate to form a clamping gap 414 for clamping the pin 112. The cylinder body of the clamping cylinder 413 is fixedly mounted on the second sliding frame 47. The second clamping arm 412 is fixedly mounted on the piston rod of the clamping cylinder 413. The clamping cylinder 413 is used to drive the second clamping arm 412 to move toward or away from the first clamping arm 411 to clamp or release the pin 112.

[0029] In this embodiment, the first clamping arm 411 is Z-shaped, with its bottom end fixedly connected to the lifting seat 48, and its top end extending from one side edge of the platform 10 to the top of the platform 10. Under the drive of the Y-axis drive module 43, it can move a certain distance along the edge of the platform 10 towards the center so as to cooperate with the second clamping arm 412 to clamp the pin 112 and realize the position adjustment in the Y-axis direction. The second clamping arm 412 is L-shaped, with its vertical part fixed to the piston rod of the clamping cylinder 413 and its horizontal part located at the top of the vertical part. The horizontal part cooperates with the top end of the first clamping arm 411 to form a clamping gap 414. When clamping the pin 112, the clamping cylinder 413 drives the horizontal part of the second clamping arm 412 to move towards the first clamping arm 411, so that the clamping gap 414 formed by the horizontal part of the second clamping arm 412 and the top end of the first clamping arm 411 becomes smaller, thereby realizing the clamping of the pin 112.

[0030] Furthermore, the clamping mechanism 20 includes a mounting bracket 21 fixedly mounted on the support 45, a sliding seat 22 slidably mounted on the mounting bracket 21, a clamping rod 23 vertically mounted on the sliding seat 22, a clamping block 24 fixedly mounted on the clamping rod 23, a first clamping drive member 25 for driving the sliding seat 22 to slide along the X-axis, and a second clamping drive member 26 for driving the clamping rod 23 to move along the Z-axis. The mounting bracket 21 is located on one side of the platform 10, the end of the clamping rod 23 away from the sliding seat 22 extends onto the platform 10, and the clamping block 24 is located at the end of the clamping rod 23 extending onto the platform 10 and is used to clamp the main FPC onto the platform 10.

[0031] After the main FPC and backlight FPC assembly 11 are placed on the stage 10, the sliding seat 22 is driven to move along the X-axis direction to directly above the main FPC and backlight FPC assembly 11 by the first clamping drive 25. Then, the clamping rod 23 is driven to descend by the second clamping drive 26, so that the clamping block 24 presses the main FPC and backlight FPC assembly 11 onto the stage 10, thereby preventing the main FPC and backlight FPC from shifting relative to the stage 10 during the alignment and welding process.

[0032] In this embodiment, the first clamping drive 25 can be a lead screw motor module, used to drive the sliding seat 22 to move along the X-axis, so that the clamping block 24 can move above or away from the preset clamping position. The second clamping drive 26 can be a cylinder, used to drive the clamping rod 23 to move up and down along the Z-axis, so that the clamping block 24 clamps or releases the main FPC. The clamping block 24 can be made of an elastic material, such as silicone or rubber, to avoid damaging the main FPC.

[0033] Furthermore, a cleaning box 211 is provided on the mounting frame 21. The cleaning box 211 is located on the side of the clamping mechanism 20 away from the platform 10. A cleaning brush 212 for cleaning the welding head 51 of the welding mechanism 50 is provided inside the cleaning box 211.

[0034] Understandably, solder dross or oxides may remain on the soldering head 51 during the soldering process, affecting the subsequent soldering quality. Therefore, this application provides a cleaning box 211 on the mounting bracket 21, allowing the soldering head 51 to be moved to the cleaning box 211 when needed, where the cleaning brush 212 automatically removes surface residues without manual intervention, ensuring soldering consistency and extending the service life of the soldering head 51.

[0035] Furthermore, the fully automatic welding machine also includes a frame 200, on which a fixed frame 210 is provided. The alignment and pressure welding unit 100 also includes a platform drive module 60 for driving the platform 10 to move. The alignment and pressure welding unit 100 is located on the frame 200. The vision positioning mechanism 30 and the welding mechanism 50 are respectively located on both sides of the fixed frame 210 relative to the Y-axis direction. The cleaning box 211 is located on the side of the platform 10 facing the fixed frame 210. The platform drive module 60 is used to drive the platform 10 to move relative to the frame 200 along the Y-axis direction, so that the platform 10 first moves to below the vision positioning mechanism 30 and then moves to below the welding mechanism 50.

[0036] Understandably, by positioning the visual positioning mechanism 30 and the welding mechanism 50 separately on both sides of the fixed frame 210 along the Y-axis, the platform 10, driven by the platform drive module 60, moves sequentially to below the visual positioning mechanism 30 and the welding mechanism 50, thus achieving automatic flow of alignment and welding. Since alignment and welding are completed on the same platform 10, and no robotic arm is required for handling, secondary offset caused by handling is avoided, ensuring positioning accuracy. At the same time, the cleaning box 211 is located on the side of the platform 10 facing the fixed frame 210, so that the cleaning box 211 moves to below the welding mechanism 50 before the platform 10, thereby achieving cleaning of the welding head 51 of the welding mechanism 50 before welding.

[0037] Furthermore, in this embodiment, the stage drive module 60 is a linear motor drive module or a slide cylinder drive module, and there are multiple sets of alignment and welding units 100. These multiple sets of alignment and welding units 100 are distributed at intervals along the length direction of the fixed frame 210. During welding, the stage 10 of each alignment and welding unit 100 moves independently along the Y-axis direction under the drive of its respective stage drive module 60, so that the stage 10 passes under the vision positioning mechanism 30 and the welding mechanism 50 in sequence. Since multiple sets of alignment and welding units 100 operate in parallel, multiple products can be aligned and welded simultaneously without interference, thereby greatly improving the overall production efficiency of the machine.

[0038] Furthermore, the alignment and pressure welding unit 100 also includes a striker valve 70 disposed on the fixing frame 210. The striker valve 70 is disposed on the same side as the vision positioning mechanism 30. The striker valve 70 is used to apply flux to the pads 111 of the main FPC.

[0039] Understandably, before soldering, the striker valve 70 accurately applies flux to the solder pad 111 based on the positioning result of the vision positioning mechanism 30. This can effectively remove the oxide layer on the surface of the solder pad 111, improve solder wettability, increase soldering strength, and reduce defects such as cold solder joints and bridging.

[0040] Furthermore, the fully automatic welding machine also includes a feeding unit 300, a first transfer unit 400, a turntable unit 500, a second transfer unit 600, and a unloading unit 700; The feeding unit 300 is used to supply the assembly 11 of the main FPC and the backlight FPC to be welded to the preset feeding position 301; The first transfer unit 400 is used to transfer the assembly 11 of the main FPC and the backlight FPC to be welded to the alignment and pressure welding unit 100, and to transfer the assembly 11 of the main FPC and the backlight FPC that has been welded to the turntable unit 500. The turntable unit 500 includes a turntable 510 that can rotate intermittently. Along its circumference, the turntable 510 is provided with a loading station 511, a solder joint cleaning station 512, an AOI inspection station 513, a protective adhesive application station 514, and a unloading station 515. The turntable unit 500 also includes a solder joint cleaning mechanism 520 corresponding to the solder joint cleaning station 512, an AOI inspection mechanism 530 corresponding to the AOI inspection station 513, and a protective adhesive application mechanism 540 corresponding to the protective adhesive application station 514. The solder joint cleaning mechanism 520 is used to clean the solder joints after the pins 112 and the solder pads 111 are soldered. The AOI inspection mechanism 530 is used to inspect the soldering quality of the solder joints. The protective adhesive application mechanism 540 is used to apply protective adhesive to the solder joints. When the turntable 510 rotates, the product passes through the solder joint cleaning station 512, the AOI inspection station 513, the protective adhesive application station 514, and the unloading station 515 in sequence. The second transfer unit 600 is used to transfer the product located at the unloading station 515 to the unloading unit 700, and the unloading unit 700 performs unloading and conveying of the product.

[0041] Understandably, by integrating the feeding unit 300, the first transfer unit 400, the turntable unit 500, the second transfer unit 600, and the unloading unit 700, the automated process of feeding, transferring, welding, inspecting, applying protective adhesive, and unloading the assembly 11 of the main FPC and the backlight FPC is realized.

[0042] During operation, the loading unit 300 transfers the assembly 11 of the main FPC and the backlight FPC to the preset feeding position 301. The first transfer unit 400 transfers the assembly 11 of the main FPC and the backlight FPC at the preset feeding position 301 to the stage 10 of the alignment and bonding unit 100. Then, the clamping mechanism 20 clamps the assembly 11 of the main FPC and the backlight FPC onto the stage 10. At this time, the stage driving module 60 drives the stage 10 to move below the vision positioning mechanism 30 on the fixing frame 210, and the vision positioning mechanism 30 obtains the pin 112. The positional deviation between the pin 112 and the pad 111 is compensated by the clamping assembly 41 clamping the pin 112. The X-axis drive module 42, Y-axis drive module 43 and Z-axis drive module 44 drive the clamping assembly 41 to move in the X, Y and Z directions to compensate for the positional deviation between the pin 112 and the pad 111, so as to achieve precise alignment between the pin 112 and the pad 111. At this time, the stage drive module 60 continues to drive the stage 10 to move, so that the stage 10 moves to below the welding mechanism 50, and the pin 112 and the pad 111 are welded by the pressure welding head 51 of the welding mechanism 50. After welding is completed, the stage drive module 60 drives the stage 10 to move in the reverse direction, moving the assembled main FPC and backlight FPC 11 to the first transfer unit 400. The first transfer unit 400 then transfers it to the loading station 511 of the turntable 510. The turntable 510 of the drive unit 500 rotates intermittently, causing the assembled main FPC and backlight FPC 11 to sequentially pass through the solder joint cleaning station 512, the AOI inspection station 513, the protective adhesive application station 514, and the unloading station 515. Finally, the second transfer unit 600 transfers the assembled main FPC and backlight FPC 11 from the unloading station 515 to the unloading unit 700, completing the unloading process. The entire process requires no manual intervention, and each station works in parallel with a tight cycle, effectively improving production efficiency and product yield.

[0043] Furthermore, the fully automatic welding machine also includes a defective product unloading line of 900. When the AOI inspection mechanism 530 detects a welding defect, the protective adhesive application mechanism 540 does not apply adhesive to the defective product. The defective product is rotated to the unloading station 515 by the turntable 510, and the second transfer unit 600 transfers the defective product located at the unloading station 515 to the defective product unloading line 900. When the AOI inspection unit 530 detects a welded product that is in good condition, the protective adhesive application unit 540 applies adhesive to the product. The product then rotates with the turntable 510 to the unloading station 515. The second transfer unit 600 transfers the product located at the unloading station 515 to the unloading unit 700.

[0044] Understandably, by setting up a defective product unloading line at 900 and using AOI inspection results, automatic separation of good and defective products is achieved. Defective products do not undergo adhesive treatment, avoiding unnecessary material consumption and improving production economy.

[0045] Furthermore, the fully automatic welding machine also includes a positioning unit 800 located between the feeding unit 300 and the first transfer unit 400. The positioning unit 800 is used to position the assembly 11 of the main FPC and the backlight FPC to be welded supplied by the feeding unit 300. When the feeding unit 300 supplies the assembly 11 of the main FPC and the backlight FPC to be welded to the preset feeding position 301, the first transfer unit 400 transfers the assembly 11 of the main FPC and the backlight FPC to the positioning unit 800, and positions it by the positioning unit 800. After the positioning is completed, the first transfer unit 400 then transfers the positioned assembly 11 of the main FPC and the backlight FPC to be welded to the alignment pressure welding unit 100.

[0046] Understandably, by adding a positioning unit 800 between the material loading and welding, the backlight FPC and the main FPC to be welded can be pre-positioned, which can eliminate the material position deviation, improve the pick-and-place accuracy of the subsequent transfer and alignment pressure welding unit 100, reduce the adjustment range of the alignment mechanism 40, and further improve the overall production efficiency and positioning stability.

[0047] In this embodiment, the feeding unit 300 includes a feeding conveyor line 310 and a feeding blocking assembly 320 disposed on the feeding conveyor line 310. The feeding blocking assembly 320 is disposed at one end of the feeding conveyor line 310 near the first transfer unit 400. There are three sets of feeding blocking assemblies 320, which are respectively disposed on three sides of the preset feeding position 301 of the feeding conveyor line 310. The feeding blocking assembly 320 includes a blocking member 321 disposed at the preset feeding position 301 of the feeding conveyor line 310 and a blocking drive cylinder 322 for driving the blocking member 321 to move toward or away from the feeding conveyor line 310. The blocking member 321 includes a blocking frame 321 disposed outside the feeding conveyor line 310. 1. A plurality of blocking rods 3212 and blocking rollers 3213 are provided on the blocking frame 3211. One end of the blocking rod 3212 is fixed to the blocking frame 3211, and the other end extends above the feeding conveyor line 310. The blocking roller 3213 is fixedly provided at one end of the blocking rod 3212 extending to the feeding conveyor line 310 and is suspended relative to the feeding conveyor line 310. The piston rod of the blocking drive cylinder 322 is fixedly connected to the blocking frame 3211 to drive the blocking frame 3211 to move toward or away from the feeding conveyor line 310, so that the blocking roller 3213 can block and position the combination 11 of the main FPC and the backlight FPC that is conveyed to the preset feeding position 301 by the feeding conveyor line 310.

[0048] Understandably, when the feeding conveyor line 310 transports the combination 11 of the main FPC and the backlight FPC to the preset feeding position 301, the blocking frame 3211 is driven synchronously by three blocking cylinders to move towards the feeding conveyor line 310, thereby blocking and positioning the combination 11 of the main FPC and the backlight FPC from three directions, so as to facilitate the first transfer unit 400 to transfer it.

[0049] In this embodiment, the first transfer unit 400 includes a first transfer frame a410, a first transfer frame b420, a first transfer transfer platform 430 disposed between the first transfer frame a410 and the first transfer frame b420, a first transfer suction cup assembly a440 disposed on the first transfer frame a410, and a first transfer suction cup assembly b450 disposed on the first transfer frame b420. The number of first transfer suction cup assemblies a440 is two sets, one of which is used to transfer the assembly 11 of the main FPC and the backlight FPC at the preset feeding position 301. The assembly is loaded onto the positioning unit 800, which pre-positions the main FPC and backlight FPC assembly 11. Then, the pre-positioned main FPC and backlight FPC assembly 11 is transferred to the alignment and welding unit 100 for welding. Another set is used to transfer the welded main FPC and backlight FPC assembly 11 to the first transfer transfer platform 430. The first suction cup assembly b450 is used to transfer the main FPC and backlight FPC assembly 11 on the first transfer transfer platform 430 to the loading station 511 of the turntable unit 500.

[0050] In this embodiment, the positioning unit 800 includes a positioning sliding frame 810 slidably disposed on one side of the loading unit 300, a positioning bearing seat 820 disposed on the positioning sliding frame 810, two first positioning sliding seats 830 slidably disposed on the positioning sliding frame 810 along the X-axis direction, a plurality of first positioning posts 840 disposed on the first positioning sliding seats 830, a second positioning sliding seat 850 slidably disposed on the positioning sliding frame 810 along the Y-axis direction, a plurality of second positioning posts 860 disposed on the second positioning sliding seats 850, and a mechanism for driving the positioning sliding frame 810 to move towards or away from the loading unit 300. The system includes a positioning drive module 870 for directional movement, a first positioning drive 880 for driving two first positioning sliding seats 830 to move closer to or further away from each other along the X-axis, and a second positioning drive 890 for driving a second positioning sliding seat 850 to move closer to or further away from the positioning support seat 820 along the Y-axis. The two first positioning sliding seats 830 are symmetrically arranged on both sides of the positioning support seat 820. The positioning drive module 870 is a linear motor module or a cylinder slide module, the first positioning drive 880 is a belt drive module, and the second positioning drive 890 is a cylinder.

[0051] During operation, the positioning drive module 870 first drives the positioning sliding frame 810 to move towards the loading unit 300, so that the positioning support seat 820 can smoothly receive the main FPC and backlight FPC assembly 11 transferred by the first transfer unit 400. Then, the positioning drive module 870 drives the positioning sliding frame 810 to move away from the loading unit 300. At this time, the first positioning drive component 880 drives the two first positioning sliding seats 830 to move towards each other, thereby achieving positioning of both sides of the main FPC and backlight FPC assembly 11 on the positioning support seat 820 from the X-axis direction. The second positioning drive component 890 drives the second positioning sliding seat 850 to move towards the positioning support seat 820 along the Y-axis direction, thereby achieving positioning of the main FPC and backlight FPC assembly 11 from the Y-axis direction. After positioning is completed, the positioning drive module 870 drives the positioning sliding frame 810 to move towards the loading unit 300. Then, the first positioning drive 880 and the second positioning drive 890 drive the first positioning sliding seat 830 and the second positioning sliding seat 850 to reset, so that the first transfer unit 400 can smoothly transfer the assembly 11 of the main FPC and the backlight FPC that has completed positioning.

[0052] In this embodiment, the solder joint cleaning mechanism 520 includes a solder joint cleaning frame 521 slidably mounted on the frame 200, a paper feeding roller 522 rotatably mounted on the solder joint cleaning frame 521, a paper receiving roller 523 rotatably mounted on the solder joint cleaning frame 521, a cleaning paper 524, a plurality of guide rollers 525 rotatably mounted between the paper feeding roller 522 and the paper receiving roller 523, a cleaning area 526 mounted on the solder joint cleaning frame 521, and a first cleaning drive module 527 and a second cleaning drive module 528 respectively used to drive the solder joint cleaning frame 521 to move along a first direction and a second direction. One end of the cleaning paper 524 is fixedly connected to the paper receiving roller 523, and the other end is fixedly connected to the paper receiving roller 523 after passing through the cleaning area 526. The plurality of guide rollers 525 are used to guide the cleaning paper 524 from the paper feeding roller 522 into the cleaning area 526 and from the cleaning area 526 back to the paper receiving roller 523.

[0053] During cleaning, the rotating turntable 510 rotates the assembly 11 of the main FPC and backlight FPC, which has been soldered, located at the loading station 511 of the turntable 510, to the solder joint cleaning station 512. Then, the first cleaning drive module 527 drives the solder joint cleaning rack 521 to move closer to the solder joint cleaning station 512, so that the solder joints between the pins 112 and the pads 111 are located within the cleaning area 526 and abut against the cleaning paper 524. Afterwards, the second cleaning drive module 528 drives the solder joint cleaning rack 521 along the second... The direction of movement causes the cleaning area 526 and the cleaning paper 524 within the cleaning area 526 to move. At this time, the turntable 510 and the combination 11 of the main FPC and the backlight FPC on the turntable 510 remain stationary, thereby achieving the cleaning of the solder joints. After cleaning is completed, the first cleaning drive module 527 drives the solder joint cleaning frame 521 to reset, making room for the turntable 510 to rotate, so that the combination 11 of the main FPC and the backlight FPC on the turntable 510 that has completed the solder joint cleaning rotates to the next station (AOI inspection station 513).

[0054] In this embodiment, the AOI inspection mechanism 530 includes an AOI inspection frame 531 fixed on the frame 200, an AOI inspection camera 532 mounted on the AOI inspection frame 531, and an AOI three-axis drive module 533 for driving the AOI inspection camera 532 to move.

[0055] During inspection, the rotating turntable 510 drives the assembly 11 of the cleaned main FPC and backlight FPC to rotate from the solder joint cleaning station 512 to the AOI inspection station 513. Then, the AOI inspection camera 532 is moved by the AOI three-axis drive module 533 to adjust its position, so that the AOI inspection camera 532 can flexibly adapt to the solder joint position of products of different sizes, ensuring that the AOI inspection camera 532 is always at the optimal shooting distance and angle, thus guaranteeing the inspection quality.

[0056] In this embodiment, the protective adhesive application mechanism 540 includes a protective adhesive application bracket 541 fixedly mounted on the frame 200, an adhesive application robot 542 mounted on the protective adhesive application bracket 541, a protective adhesive application three-axis drive module 543 for driving the adhesive application robot 542 to move, and a protective adhesive supply component 544 for supplying protective adhesive. The protective adhesive supply component 544 is a feeder, used to continuously supply a preset length of protective adhesive to the adhesive application robot 542.

[0057] During dispensing, the drive turntable 510 rotates, causing the assembly 11 of the main FPC and backlight FPC that has completed inspection to rotate from the AOI inspection station 513 to the protective adhesive application station 514. Then, the protective adhesive application three-axis drive module 543 drives the adhesive application robot 542 to move, so that the adhesive application robot 542 first picks up the protective adhesive supplied by the protective adhesive supply component 544, and then applies the picked-up protective adhesive precisely to the solder joint position to achieve protection of the solder joint position.

[0058] In this embodiment, the second transfer unit 600 includes a second transfer frame 610 fixedly disposed between the turntable unit 500 and the unloading unit 700, a second suction cup assembly 620 disposed on the second transfer frame 610, a second transfer drive module a630 for driving the second suction cup assembly 620 to move along the X-axis, and a second transfer drive module b640 for driving the second suction cup assembly 620 to move along the Y-axis.

[0059] When the turntable 510 rotates the assembly 11 of the main FPC and the backlight FPC that has been dispensed to the unloading station 515, the second transfer drive module a630 drives the second suction cup assembly 620 to move towards the unloading station 515, so that the second suction cup assembly 620 can smoothly pick up the assembly 11 of the main FPC and the backlight FPC. Then, the second transfer drive module a630 drives the second suction cup assembly 620 to reset, and then the second transfer drive module b640 drives the second suction cup assembly 620 to move towards the unloading unit 700, so that the second suction cup assembly 620 can smoothly place the assembly 11 of the main FPC and the backlight FPC on the unloading unit 700, thereby realizing the unloading of the assembly 11 of the main FPC and the backlight FPC.

[0060] In this embodiment, the unloading unit 700 includes an unloading conveyor line 710 and a defective product unloading line 900 arranged side by side with the unloading conveyor line 710 on the frame 200. When a defective product is detected, the second transfer unit 600 transfers the defective product from the unloading station 515 of the turntable 510 to the defective product unloading line 900. When no defective product is detected, the second transfer unit 600 transfers the good products on the unloading unit 700 from the unloading station 515 to the unloading conveyor line 710.

[0061] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A fully automatic welding machine, characterized in that, Includes a positioning pressure welding unit (100), the positioning pressure welding unit (100) comprising: A stage (10) is used to support the assembly (11) of the main FPC and the backlight FPC to be welded; A pressing mechanism (20) is provided above the platform (10) in a liftable and slidable manner, for pressing the assembly (11) of the main FPC and the backlight FPC onto the platform (10); A visual positioning mechanism (30) is disposed above the stage (10) and includes at least one CCD camera (31) for capturing images of the pins (112) of the backlight FPC and the pads (111) of the main FPC to obtain the positional deviation between the pins (112) and the pads (111). The alignment mechanism (40) includes a clamping assembly (41), an X-axis drive module (42), a Y-axis drive module (43), and a Z-axis drive module (44). The clamping assembly (41) is used to clamp the pins (112) of the backlight FPC. The X-axis drive module (42), the Y-axis drive module (43), and the Z-axis drive module (44) are used to drive the clamping assembly (41) to move along the X-axis, Y-axis, and Z-axis directions, respectively, to compensate for the positional deviation between the pins (112) and the pads (111), so that the pins (112) and the pads (111) are precisely aligned. The welding mechanism (50) is movable and can be raised and lowered above the platform (10). The welding mechanism (50) has a pressure welding head (51), which is used to weld the pin (112) and the pad (111) after they are aligned.

2. The fully automatic welding machine according to claim 1, characterized in that, The alignment mechanism (40) further includes a support base (45), a first sliding frame (46) slidably disposed on the support base (45), a second sliding frame (47) slidably disposed on the first sliding frame (46), and a lifting seat (48) slidably disposed on the second sliding frame (47). The platform (10) is fixedly disposed on the support base (45). The first sliding frame (46), the second sliding frame (47), and the lifting seat (48) are all located below the platform (10). The clamping assembly (41) is disposed on the lifting seat (48). The X-axis drive module (42) is disposed on the support base (45) and is used to drive the first sliding frame (46) to slide along the X-axis direction. The Y-axis drive module (43) is disposed on the first sliding frame (46) and is used to drive the second sliding frame (47) to slide along the Y-axis direction. The Z-axis drive module (44) is disposed on the second sliding frame (47) and is used to drive the lifting seat (48) to slide along the Z-axis direction.

3. The fully automatic welding machine according to claim 2, characterized in that, The clamping assembly (41) includes a first clamping arm (411) fixedly mounted on the lifting seat (48), a second clamping arm (412) mounted on the lifting seat (48), and a clamping cylinder (413). The first clamping arm (411) and the second clamping arm (412) cooperate to form a clamping gap (414) for clamping the pin (112). The piston rod of the clamping cylinder (413) is fixedly connected to the second clamping arm (412) and is used to drive the second clamping arm (412) to move toward or away from the first clamping arm (411) to clamp or release the pin (112).

4. The fully automatic welding machine according to claim 2, characterized in that, The clamping mechanism (20) includes a mounting bracket (21) fixed on a support (45), a sliding seat (22) slidably mounted on the mounting bracket (21), a clamping rod (23) slidably mounted on the sliding seat (22), a clamping block (24) fixed on the clamping rod (23), a first clamping drive (25) for driving the sliding seat (22) to slide along the X-axis, and a second clamping drive (26) for driving the clamping rod (23) to move along the Z-axis. The mounting bracket (21) is located on one side of the platform (10). The end of the clamping rod (23) away from the sliding seat (22) extends onto the platform (10). The clamping block (24) is located at the end of the clamping rod (23) extending onto the platform (10) and is used to clamp the main FPC onto the platform (10).

5. The fully automatic welding machine according to claim 4, characterized in that, The mounting bracket (21) is provided with a cleaning box (211), and the cleaning box (211) is provided with a cleaning brush (212) for cleaning the pressure welding head (51) of the welding mechanism (50).

6. The fully automatic welding machine according to claim 5, characterized in that, The fully automatic welding machine also includes a frame (200), on which a fixed frame (210) is provided. The alignment pressure welding unit (100) also includes a platform driving module (60) for driving the platform (10) to move. The vision positioning mechanism (30) and the welding mechanism (50) are respectively located on both sides of the fixed frame (210) relative to the Y-axis direction. The cleaning box (211) is located on the side of the platform (10) facing the fixed frame (210). The platform driving module (60) is used to drive the platform (10) to move relative to the frame (200) along the Y-axis direction, so that the platform (10) first moves to below the vision positioning mechanism (30) and then moves to below the welding mechanism (50).

7. A fully automatic welding machine according to claim 6, characterized in that, The alignment welding unit (100) also includes a striker valve (70) disposed on the fixing frame (210). The striker valve (70) is disposed on the same side as the vision positioning mechanism (30). The striker valve (70) is used to apply flux to the pads (111) of the main FPC.

8. A fully automatic welding machine according to any one of claims 1-7, characterized in that, The fully automatic welding machine also includes a feeding unit (300), a first transfer unit (400), a turntable unit (500), a second transfer unit (600), and a unloading unit (700); The feeding unit (300) is used to supply the assembly (11) of the main FPC and the backlight FPC to be welded to the preset feeding position (301); The first transfer unit (400) is used to transfer the assembly (11) of the main FPC and the backlight FPC to be welded to the alignment pressure welding unit (100), and to transfer the assembly (11) of the main FPC and the backlight FPC that has been welded to the turntable unit (500). The turntable unit (500) includes a turntable (510) that can rotate intermittently. The turntable (510) is provided with a loading station (511), a solder joint cleaning station (512), an AOI inspection station (513), a protective adhesive application station (514), and a unloading station (515) in sequence along its circumference. The turntable unit (500) also includes a solder joint cleaning mechanism (520) corresponding to the solder joint cleaning station (512), an AOI inspection mechanism (530) corresponding to the AOI inspection station (513), and a protective adhesive application mechanism (540) corresponding to the protective adhesive application station (514). The solder joint cleaning mechanism (520) is used to clean the solder joints after the pins (112) and the pads (111) are soldered. The AOI inspection mechanism (530) is used to inspect the soldering quality of the solder joints. The protective adhesive application mechanism (540) is used to apply protective adhesive to the solder joints. The second transfer unit (600) is used to transfer the product located at the unloading station (515) to the unloading unit (700), and the unloading unit (700) unloads and conveys the product.

9. A fully automatic welding machine according to claim 8, characterized in that, The fully automatic welding machine also includes a defective product unloading line (900); When the AOI inspection mechanism (530) detects a welding defect, the protective adhesive application mechanism (540) does not apply adhesive to the defective product. The defective product is rotated to the unloading station (515) by the turntable (510), and the second transfer unit (600) transfers the defective product located at the unloading station (515) to the defective product unloading line (900). When the AOI inspection mechanism (530) detects a good welded product, the protective adhesive application mechanism (540) applies adhesive to the good product, and the good product rotates with the turntable (510) to the unloading station (515). The second transfer unit (600) transfers the good product located at the unloading station (515) to the unloading unit (700).

10. A fully automatic welding machine according to claim 8, characterized in that, The fully automatic welding machine also includes a positioning unit (800) located between the feeding unit (300) and the first transfer unit (400). The positioning unit (800) is used to position the assembly (11) of the main FPC and the backlight FPC to be welded supplied by the feeding unit (300). When the feeding unit (300) supplies the assembly (11) of the main FPC and the backlight FPC to be welded to the preset feeding position (301), the first transfer unit (400) transfers the assembly (11) of the main FPC and the backlight FPC to the positioning unit (800), and positions it by the positioning unit (800). After the positioning is completed, the first transfer unit (400) then transfers the positioned assembly (11) of the main FPC and the backlight FPC to be welded to the alignment pressure welding unit (100).

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