Keyboard key touch circuit board automatic welding assembly production line and production method

Abstract

The application discloses a keyboard key touch control circuit board automatic welding assembly production line and a production method, which comprises first and second conveying lines arranged in parallel, buffer feeding lifting mechanisms arranged at both ends of the conveying lines, a plurality of PCB feeding mechanisms arranged along the conveying lines, a plurality of FFC feeding operation tables, a flux brushing mechanism, a welding mechanism, a detection mechanism and an automatic discharging mechanism; the buffer feeding lifting mechanism comprises a support that moves up and down, a plurality of layers of support trays arranged at intervals on the support, a first cylinder fixed at a set height and a push rod driven by the first cylinder and pushing the carrier to the first conveying line; the first end of the second conveying line is provided with a pushing mechanism that pushes the carrier to the support tray, and the upper portion is provided with a second code scanning gun that scans the code of the carrier pushed to the support tray. The application can realize the welding assembly of the keyboard key touch control board, has high assembly efficiency, and can simultaneously assemble various models of products, and has high universality.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electronic product manufacturing, and particularly relates to an automatic welding and assembling production line for keyboard key touch circuit boards and a production method. BACKGROUND

[0002] A keyboard is an important input device for computers to interact with people. A keyboard has a plurality of key assemblies with different functions according to input habits and function designs. The key assemblies include a touch circuit board assembly and a pressing assembly for triggering the touch circuit board assembly. The pressing assembly includes a key cap support, a balance bar, and a key cap. The touch circuit board assembly generally includes a circuit board (which can be a very thin hard circuit board, or a flexible and hard composite circuit board, or a flexible circuit board) with an area similar to that of the key cap, and an FFC board for connecting the circuit board to the main board of the keyboard. The FFC board is a flexible flat cable, which is very thin and soft. During the assembly of the touch circuit board assembly, the FFC board needs to be welded together with the above-mentioned circuit board. However, the FFC board is very soft and needs to be aligned with the pin points on the circuit board one by one before welding, which brings great difficulty to the design of the automatic welding equipment for the touch circuit board. In addition, there are a large number of key caps on the keyboard, and therefore the types of touch circuit board assemblies are also numerous. In order to improve the utilization rate of the equipment, the versatility of the assembly production line needs to be considered to maximize the sharing of multiple products.

[0003] The prior art CN114378391A discloses a printed circuit board assembly device and method. On the one hand, it cannot be directly applied to the feeding and welding operation of the above-mentioned FFC board, which is an elongated strip and very soft flat cable. On the other hand, it also cannot realize the versatility of keyboard key touch circuit boards of multiple specifications. A keyboard involves a plurality of different types and sizes of key caps. If different types of key caps are to be produced, the next type of key cap can only be assembled after the production of the previous type of key cap is completed, or a plurality of sets of assembly equipment are set up for simultaneous production, which is high in equipment investment cost.

[0004] It is necessary to provide a new automatic welding and assembling production line for keyboard key touch circuit boards and a production method to solve the above technical problems. SUMMARY

[0005] The main purpose of the present application is to provide an automatic welding and assembling production line for keyboard key touch circuit boards, which can realize automatic welding and assembling of keyboard key touch circuit boards, has high assembling efficiency, and can simultaneously assemble key touch circuit board assemblies of multiple types, and has high versatility.

[0006] The application realizes the above-mentioned purpose through the following technical scheme: a keyboard key touch circuit board automatic welding assembly production line, which comprises a first conveying line and a second conveying line arranged in parallel, a buffer feeding lifting mechanism arranged at both ends of the first conveying line and the second conveying line, a plurality of PCB feeding mechanisms arranged along the first conveying line, a plurality of FFC feeding operation tables, a flux brushing mechanism, a welding mechanism, a detection mechanism and an automatic discharging mechanism, and a carrier conveyed on the first conveying line and the second conveying line.

[0007] The buffer feeding lifting mechanism comprises a first motor, a bracket driven by the first motor to move up and down, a plurality of layers of support trays arranged in parallel at different heights on the bracket, a first cylinder fixedly arranged at a set height position, and a push rod driven by the first cylinder to push the carrier in the support tray outward to the first conveying line; a sensor is arranged on the bracket corresponding to the position of each support tray to monitor whether the carrier is in the support tray.

[0008] The first end of the second conveying line is provided with a pushing mechanism for pushing the carrier onto the support tray, and the upper part of the second conveying line is provided with a second code scanning gun for scanning the code of the carrier before the carrier is pushed onto the support tray.

[0009] Further, a first lifting mechanism is arranged at the PCB feeding mechanism to lift the carrier on the first conveying line upward; a second lifting mechanism is arranged at the FFC feeding operation table, the flux brushing mechanism and the welding mechanism to lift the carrier upward; a stopping mechanism is arranged at the positions of the PCB feeding mechanism, the FFC feeding operation table, the flux brushing mechanism, the welding mechanism, the detection mechanism and the automatic discharging mechanism to stop the carrier from moving forward; and a conveying channel is formed below the carrier after the carrier is lifted from the first conveying line by the first lifting mechanism and the second lifting mechanism for the subsequent carrier to continue moving forward.

[0010] Further, the support tray comprises a support bottom plate for carrying the carrier and a limiting baffle arranged on both sides of the support bottom plate to limit the positions of the carrier on both sides; and a sliding roller is arranged on the support bottom plate to increase the sliding smoothness of the carrier.

[0011] Further, the carrier comprises a carrier plate, a limiting carrying groove arranged on the carrier plate for carrying a limiting PCB plate, and a pressing plate rotatably arranged on one side of the carrier plate for pressing the PCB plate and the FFC plate in the welding and butt joint area; and a two-dimensional code is arranged on the carrier plate to carry the set information of the carrier.

[0012] Further, the PCB feeding mechanism comprises a plurality of feeding units arranged beside the first conveying line, a plurality of PCB transfer units located directly above the first conveying line, and a feeding carrying unit covering the working range of the feeding units and the PCB transfer units.

[0013] Further, the feeding unit comprises a first support plate, a PCB feeding tray positioned on the first support plate, and a fifth cylinder driving the first support plate to move vertically along the first conveying line between a replenishment position and a feeding position.

[0014] Further, the PCB transfer unit comprises a third support plate located above the first conveying line, a second cylinder fixed on the third support plate, and a transfer plate driven by the second cylinder to rotate around a horizontal shaft, wherein the transfer plate comprises oppositely arranged first and second receiving plates, and a plurality of receiving grooves are arranged on the first and second receiving plates, and a plurality of suction holes are arranged in the receiving grooves.

[0015] Further, the FFC feeding operation table comprises an FFC feeding tray for feeding FFC boards and a scanner for scanning two-dimensional codes on the FFC boards.

[0016] Further, the automatic discharging mechanism comprises a plurality of receiving trays arranged on both sides of the first conveying line, and a discharging carrying unit covering the motion range of all the receiving trays.

[0017] Further, a first code scanning gun is arranged between the detection mechanism and the welding mechanism, or downstream of the detection mechanism.

[0018] Another object of the present application is to provide a production method based on the above-mentioned assembly production line, which comprises the following steps:

[0019] S1. An empty carrier completes automatic feeding of a PCB board at the PCB feeding mechanism;

[0020] S2. The carrier carrying the PCB board moves along the first conveying line to the FFC feeding operation table, an operator places an FFC board on the carrier, aligns and overlaps the welding pins on the PCB board and the FFC board, then lowers the pressing plate on the carrier and presses it in the alignment and overlap area of the welding pins.

[0021] S3. The carrier carrying the PCB board and the FFC board moves along the first conveying line to the flux brushing mechanism, the welding mechanism and the detection mechanism in sequence, respectively completes brushing of flux on the welding pins, welding of the pins on the PCB board and the FFC board, and detection of the welding quality of the pins.

[0022] S4, scanning the carrier to obtain model information;

[0023] S5, the carrier moves to the automatic unloading mechanism, and the automatic unloading mechanism places qualified products into corresponding material receiving trays according to the model information of the carrier and the detection result of the detection mechanism, and discharges unqualified products;

[0024] S6, the empty carrier is transferred to the second conveying line below by the buffer delivery lifting mechanism at the tail end, and is moved to the head end by the second conveying line;

[0025] S7, the second code scanning gun scans the carrier, and then the pushing mechanism pushes the carrier to the buffer delivery lifting mechanism at the head end, and the system records the layer position of the scanned carrier, so as to realize automatic recycling of the carrier;

[0026] S8, when the loading station in the PCB loading mechanism or the loading station in the FFC loading operation table is in an idle state, the carrier of the corresponding model is released by the buffer delivery lifting mechanism at the head end on the first conveying line, and then is conveyed to the loading station by the first conveying line, so as to realize automatic delivery of the carrier.

[0027] Compared with the prior art, the automatic welding and assembly production line and production method of the keyboard key touch circuit board have the beneficial effects that: by setting the upper and lower conveying lines, and setting the buffer delivery lifting mechanism at both ends of the conveying line, cooperating with the two-dimensional code on the carrier and the code scanning gun at the set position, and setting multiple PCB loading stations and multiple FFC loading stations, a single assembly production line can produce multiple different models of keyboard key touch circuit boards, which greatly improves the assembly efficiency, provides the versatility of the production line, and reduces the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the three-dimensional structure of the embodiment of the present application;

[0029] Figure 2 is a schematic diagram of the main view structure of the embodiment of the present application after reducing the number of PCB loading mechanisms and FFC loading operation tables;

[0030] Figure 3 is a schematic diagram of the structure of the buffer delivery lifting mechanism in the embodiment of the present application;

[0031] Figure 4 is a schematic diagram of part of the structure of the buffer delivery lifting mechanism in the embodiment of the present application;

[0032] Figure 5 is a schematic diagram of the structure of the carrier in the embodiment of the present application;

[0033] Figure 6 Structure schematic view of the PCB feeding mechanism in the embodiment of the present application;

[0034] Figure 7 Structure schematic view of the PCB feeding unit in the embodiment of the present application;

[0035] Figure 8 Structure schematic view of the PCB feeding station in the embodiment of the present application;

[0036] Figure 9 Structure schematic view of the PCB feeding and carrying unit in the embodiment of the present application;

[0037] Figure 10 Structure schematic view of the FFC feeding operation table in the embodiment of the present application;

[0038] Figure 11 Structure schematic view of the FFC feeding station in the embodiment of the present application;

[0039] Figure 12 Structure schematic view of the automatic discharging mechanism in the embodiment of the present application;

[0040] Figure 13 Partial structure schematic view of the automatic discharging mechanism in the embodiment of the present application;

[0041] Figure 14 Structure schematic view of the pushing mechanism at the first end of the second conveying line in the embodiment of the present application;

[0042] Numerals in the figure represent:

[0043] 100 - automatic welding and assembling production line for keyboard key touch circuit board

[0044] 200 - keyboard key touch circuit board, 201 - PCB board, 202 - FFC board

[0045] 1 - first conveying line

[0046] 2 - second conveying line

[0047] 3 - buffer feeding and lifting mechanism, 31 - base, 32 - first motor, 33 - support, 34 - support tray, 341 - support bottom plate, 342 - limiting baffle, 343 - sliding roller, 35 - first air cylinder, 36 - push rod, 37 - sensor

[0048] 4-PCB loading mechanism, 41-feeding unit, 411-PCB feeding tray, 412-fifth cylinder, 42-PCB transfer unit, 421-third support plate, 422-second cylinder, 423-transfer plate, 4231-first receiving plate, 4232-second receiving plate, 4233-receiving groove, 43-loading carrying unit, 431-XYZ transfer module, 432-sixth support plate, 433-second motor, 434-rotary plate, 435-vision camera, 436-PCB suction module, 4361-third cylinder, 4362-first suction block;

[0049] 5-FFC loading operation platform, 51-FFC feeding tray, 52-display, 53-magnifying camera;

[0050] 6-flux brushing mechanism; 7-welding mechanism; 8-detection mechanism;

[0051] 9-automatic unloading mechanism, 91-receiving tray, 92-unloading carrying unit, 921-XY axis transfer module, 922-fifth support plate, 923-fourth cylinder, 924-second suction block;

[0052] 10-carrier, 101-carrier plate, 102-limiting bearing groove, 103-pressing plate, 104-2D code, 105-positioning hole;

[0053] 11-first jacking mechanism, 111-third motor, 112-second support plate, 113-first positioning column;

[0054] 12-second jacking mechanism, 121-sixth cylinder, 122-fourth support plate, 123-second positioning column; 13-stopping mechanism; 14-first code scanning gun; 15-pushing mechanism; 16-second code scanning gun.

DETAILED DESCRIPTION

[0055] Example one:

[0056] Please refer to Figures 1-14 The embodiment is an automatic welding and assembly production line 100 for keyboard key touch circuit board, which comprises a first conveying line 1 and a second conveying line 2 arranged in parallel, a buffer feeding and lifting mechanism 3 arranged at both ends of the first conveying line 1 and the second conveying line 2, at least one PCB loading mechanism 4 arranged along the first conveying line 1, at least one FFC loading operation platform 5, a flux brushing mechanism 6, a welding mechanism 7, a detection mechanism 8 and an automatic unloading mechanism 9, and a carrier 10 conveyed on the first conveying line 1 and the second conveying line 2.

[0057] The automatic welding assembly production line of the embodiment is mainly used for realizing automatic assembly of the keyboard key touch circuit board 200, and the keyboard key touch circuit board 200 comprises a PCB board 201 and a FFC board 202 welded with the PCB board 201.

[0058] The first lifting mechanism 11 is arranged at the PCB loading mechanism 4 and is used for lifting the carrier 10 on the first conveying line 1 upward. The second lifting mechanism 12 is arranged at the FFC loading operation table 5, the solder flux brushing mechanism 6 and the welding mechanism 7 and is used for lifting the carrier 10 upward. The stop mechanism 13 is arranged at the positions of the PCB loading mechanism 4, the FFC loading operation table 5, the solder flux brushing mechanism 6, the welding mechanism 7, the detection mechanism 8 and the automatic unloading mechanism 9 and is used for stopping the carrier 10.

[0059] In order to improve the assembly efficiency, a plurality of loading stations are arranged in the PCB loading mechanism 4. On the one hand, a plurality of carriers 10 can be loaded simultaneously. On the other hand, the automatic loading of a plurality of different keyboard key touch circuit board assemblies can be realized, the composite assembly operation of a plurality of different material numbers can be realized, and the versatility of the equipment can be improved.

[0060] The buffer delivery lifting mechanism 3 comprises a base 31, a first motor 32 fixed on the base 31, a bracket 33 driven by the first motor 32 to move up and down, a plurality of layers of support trays 34 arranged in the bracket 33 in a vertical direction, a first air cylinder 35 fixed on the base 31 and a push rod 36 driven by the first air cylinder 35 to push the carrier 10 in the support tray 34 outward. The sensor 37 is arranged on the bracket 33 and corresponds to the position of each support tray 34 and is used for monitoring whether the carrier 10 is in the support tray 34.

[0061] The support tray 34 comprises a support bottom plate 341 for carrying the carrier 10 and a limiting baffle 342 arranged on both sides of the support bottom plate 341 and used for limiting the positions of the left and right sides of the carrier 10. The sliding roller 343 is arranged on the support bottom plate 341 and is used for increasing the sliding smoothness of the carrier 10.

[0062] The carrier 10 comprises a carrier plate 101, a limiting carrying groove 102 arranged on the carrier plate 101 and used for carrying the limiting PCB board 201, a pressing plate 103 rotatably arranged on one side of the carrier plate 101 and used for pressing and holding the welding butt joint area of the PCB board 201 and the FFC board 202. The two-dimensional code 104 is arranged on the carrier plate 101 and is used for carrying the model information of the carrier 10. The model of the carrier 10 and the model of the corresponding carried product can be obtained by scanning the two-dimensional code 104. At least one pair of positioning holes 105 is arranged on the carrier plate 101 and is used for facilitating positioning of the carrier 10. In the embodiment, two carrying positions are arranged on the carrier 10 and are used for carrying two products.

[0063] The PCB loading mechanism 4 includes a plurality of feeding units 41 arranged beside the first conveyor line 1 , a plurality of PCB transfer units 42 located directly above the first conveyor line 1 , and a loading and handling unit 43 whose working range covers the feeding units 41 and the PCB transfer units 42 .

[0064] In this embodiment, two PCB loading mechanisms 4 are provided, arranged along the first conveyor line 1. Each PCB loading mechanism 4 has five feeding units 41 arranged along the first conveyor line 1, enabling automatic feeding of five different keyboard touchscreen circuit boards 200. In other embodiments, the number of PCB loading mechanisms 4 and feeding units 41 can be flexibly configured.

[0065] The feeding unit 41 includes a first support plate (not shown), a PCB feed tray 411 positioned on the first support plate, and a fifth cylinder 412 that drives the first support plate to move perpendicularly to the first conveyor line 1 between a replenishment position and a feeding position. An operator places the PCB feed tray 411 carrying the PCB boards 201 on the first support plate. The fifth cylinder 412 pushes the PCB feed tray 411 to the feeding position. At the feeding position, the loading and handling unit 43 picks up a set number of PCB boards 201 from the PCB feed tray 411 and places them on the PCB transfer unit 42. The PCB transfer unit 42 then transfers them to the carrier 10 on the first conveyor line 1, completing the automatic loading of the PCB boards 201.

[0066] The first lifting mechanism 11 at the PCB loading mechanism 4 includes a third motor 111, a second support plate 112 driven by the third motor 111 to move up and down, and at least a pair of first positioning posts 113 disposed on the second support plate 112 and used to position the carrier 10. The first positioning posts 113 are inserted into the positioning holes 105 of the carrier 10 to position the carrier 10. Driven by the third motor 111, the carrier 10 is lifted upward from the first conveyor line 1 so that the preceding carrier 10 can pass through this station on the first conveyor line 1 and reach the subsequent operating station. In addition, by driving the carrier 10 to rise to a set height through the third motor 111, it can also accurately dock with the PCB adapter unit 42 to receive the PCB board.

[0067] The PCB transfer unit 42 includes a third support plate 421 located above the first conveyor line 1, a second cylinder 422 fixed on the third support plate 421, and an adapter plate 423 driven by the second cylinder 422 to rotate around a horizontal axis. The adapter plate 423 includes a first receiving plate 4231 and a second receiving plate 4232 arranged opposite to each other. A plurality of receiving grooves 4233 are provided on the first receiving plate 4231 and the second receiving plate 4232. Adsorption holes (not marked in the figure) are provided in the receiving grooves 4233 for receiving and adsorbing the PCB board 201.

[0068] The PCB adapter unit 42 works as follows. First, the first receiving plate 4231 faces upward, the feeding and carrying unit 43 carries the PCB 201 and places it on the first receiving plate 4231, then the second cylinder 422 drives the adapter plate 423 to flip 180°, so that the second receiving plate 4232 faces upward, and the PCB 201 on the first receiving plate 4231 is released onto the carrier 10 below, realizing the PCB 201 flipping and feeding; the second receiving plate 4232 facing upward synchronously receives the next PCB, improving the efficiency of PCB flipping and feeding.

[0069] By setting the PCB adapter unit 42, the PCB 201 in the PCB feeding tray 411 can be placed with the soldering pin facing upward on the carrier 10, meeting the subsequent welding requirements.

[0070] The feeding and carrying unit 43 includes an XYZ moving and carrying module 431, a sixth support plate 432 arranged at the active end of the XYZ moving and carrying module 431, a second motor 433 fixed on the sixth support plate 432, a rotating plate 434 driven by the second motor 433 to rotate around a vertical shaft, a vision camera 435 fixed on the rotating plate 434, and a PCB suction module 436.

[0071] In other embodiments, the vision camera 435 can also be fixedly arranged on the sixth support plate 432.

[0072] The PCB suction module 436 includes a third cylinder 4361 and a first suction block 4362 driven by the third cylinder 4361 to move up and down. In this embodiment, the PCB suction module 436 is provided with two groups, which can simultaneously suction two products and place them in the same carrier 10.

[0073] In this embodiment, a plurality of FFC feeding operation tables 5 are arranged, each FFC feeding operation table 5 can correspond to the operation of a touch circuit board of a type of keycap, therefore, the assembly production line of this embodiment can not only realize the assembly operation of a single type of keyboard key touch circuit board, but also realize the assembly operation of a plurality of types of keyboard key touch circuit boards.

[0074] In this embodiment, the FFC feeding operation table 5 includes an FFC feeding tray 51 for feeding FFC boards and a scanner (not shown in the figure) for scanning the two-dimensional code 104 on the carrier 10. After the carrier 10 carrying the PCB board 201 reaches the position of the FFC feeding operation table 5, the operator takes out the PCB board from the carrier 10, then takes an FFC board 202 from the FFC feeding tray 51, and then connects the FFC board 202 and the PCB board 201 by means of the respective soldering pins. Then the operator keeps the FFC board 202 in the carrier 10, and then uses the pressing plate 103 to press the pin connection area to prevent dislocation. The scanner scans the two-dimensional code 104 on the carrier 10 to ensure that the model of the carrier 10 is consistent with the model of the FFC board fed by the workstation.

[0075] In other embodiments, the FFC feeding operation table 5 includes an FFC feeding tray 51 for feeding FFC boards, a scanner (not shown in the figure) for scanning the two-dimensional code 104 on the carrier 10, and a magnifying camera 53 located above the carrier 10 for magnifying and displaying the image of the soldering pin area of the PCB board 201 on a display 52. When the carrier 10 carrying the PCB board 201 reaches the position of the FFC feeding operation table 5, the operator takes an FFC board 202 from the FFC feeding tray 51, and then accurately places the FFC board 202 on the carrier 10 under the assistance of the magnified image on the display 52, and aligns the FFC board 202 with the soldering pins on the PCB board 201. Then the operator uses the pressing plate 103 to press the pin connection area.

[0076] When the FFC board 202 is placed, the second lifting mechanism 12 lifts the carrier 10 upward to a set height to give way to the conveying channel on the first conveying line 1, so that the front carrier 10 passes through and moves to the rear FFC feeding operation table 5 or the subsequent flux brushing mechanism 6.

[0077] The second lifting mechanism 12 includes a sixth cylinder 121, a fourth support plate 122 driven by the sixth cylinder 121 to move up and down, and at least one pair of second positioning columns 123 provided on the fourth support plate 122. The second positioning columns 123 are inserted into the positioning holes 105 of the carrier 10 to position the carrier 10.

[0078] The detection mechanism 8 is a detection vision camera connected to an upper computer, and the upper computer is installed with detection software. The detection mechanism 8 mainly detects whether the PCB board 201 and the FFC board 202 are accurately soldered and whether the soldering quality meets the requirements.

[0079] The automatic unloading mechanism 9 comprises a plurality of material collecting trays 91 arranged on both sides of the first conveying line 1 and an unloading carrying unit 92 which covers the movement range of all the material collecting trays 91. The plurality of material collecting trays 91 can be used to collect various keyboard key touch circuit boards. The unloading carrying unit 92 comprises an XY-axis moving module 921, a fifth supporting plate 922 arranged at the movable end of the XY-axis moving module 921, a fourth cylinder 923 fixed on the fifth supporting plate 922, and a second suction block 924 driven by the fourth cylinder 923 to move up and down.

[0080] A first code scanning gun 14 is arranged between the detection mechanism 8 and the welding mechanism 7. By scanning the carrier 10 by the first code scanning gun, the model of the assembled product can be obtained, so that the unloading carrying unit 92 can accurately place the product on the carrier 10 into the corresponding material collecting tray 91. In other embodiments, the first code scanning gun 14 can also be arranged downstream of the detection mechanism 8.

[0081] The second conveying line 2 is provided with a pushing mechanism 15 at one end close to the PCB feeding mechanism 4, which pushes the carrier 10 into the buffer delivery lifting mechanism 3. A second code scanning gun 16 is arranged above the second conveying line 2 to scan the carrier 10 before it is pushed into the buffer delivery lifting mechanism 3. By scanning the carrier 10 by the second code scanning gun 16, the model of the carrier 10 stored in each layer of the supporting tray 34 of the buffer delivery lifting mechanism 3 can be known. When the workstations of the PCB feeding mechanism 4 corresponding to the model of the product or the workstations of the FFC feeding operation table 5 corresponding to the model of the product are in an idle state, the buffer delivery lifting mechanism 3 can release the carrier 10 of the corresponding model to the corresponding idle workstation, so as to ensure the continuous operation of each mechanism and improve the assembly efficiency.

[0082] The embodiment also provides a production method realized by the above-mentioned automatic welding and assembly production line for keyboard key touch circuit boards, which comprises the following steps:

[0083] S1, the empty carrier 10 realizes automatic feeding of the PCB board 201 at the PCB feeding mechanism 4; a plurality of PCB feeding mechanisms 4 simultaneously feed;

[0084] S2, the carrier 10 carrying the PCB board 201 moves to the FFC feeding operation table 5 along the first conveying line 1, an operator places the FFC board 202 on the carrier 10, aligns and overlaps the welding pin needles on the PCB board 201 and the FFC board 202, and then places down the pressing plate 103 on the carrier 10 and holds it in the alignment and overlap area of the welding pin needles;

[0085] S3, the carrier 10 carrying the PCB board 201 and the FFC board 202 moves to the solder flux brushing mechanism 6 along the first conveying line 1, and brushes the solder flux on the welding pin needles;

[0086] S4, the carrier 10 moves to the welding mechanism 7 to weld the Pin pins of the PCB plate 201 and the FFC plate 202 together to realize electrical connection;

[0087] S5, the carrier 10 moves to the detection mechanism 8 to detect the Pin pin welding quality;

[0088] S6, the first code scanning gun 14 scans the carrier 10 to obtain model information;

[0089] S7, the carrier 10 moves to the automatic unloading mechanism 9, the automatic unloading mechanism 9 places the qualified products into the corresponding material receiving tray 91 according to the model information of the carrier 10 and the detection result of the detection mechanism 8, and the unqualified products are discarded;

[0090] S8, the empty carrier 10 is received by the tail-end buffer feeding lifting mechanism 3 and then transferred to the second conveying line 2 below, and then moved to the head end by the second conveying line 2;

[0091] S9, the second code scanning gun 16 scans the carrier 10, and then the push mechanism 15 pushes it to the head-end buffer feeding lifting mechanism 3, and the system records the scanning carrier placement layer position;

[0092] S10, when the loading station in the PCB loading mechanism 4 or the loading station in the FFC loading operation table 5 is in an idle state, the carrier 10 corresponding to the model of the loading station is released by the head-end buffer feeding lifting mechanism 3 on the first conveying line 1, and then conveyed to the loading station by the first conveying line 1, so that all workstations can be continuously operated, the invalid waiting or idle time is reduced, and the equipment utilization is improved. On the other hand, it can also guarantee the mixed assembly of various different model keyboard key touch line plate assemblies, improve the versatility and utilization rate of the equipment.

[0093] The above only describes some embodiments of the present application. Those skilled in the art can make several modifications and improvements without departing from the inventive concept, and these all belong to the protection scope of the present application.

Claims

1. An automatic soldering assembly line for keyboard and touchscreen circuit boards, comprising a first conveyor line and a second conveyor line arranged parallel to each other, a buffering and lifting mechanism disposed at both ends of the first and second conveyor lines, multiple PCB loading mechanisms disposed along the first conveyor line, multiple FFC loading stations, a fluxing mechanism, a welding mechanism, a detection mechanism, and an automatic unloading mechanism, and carriers transported along the first and second conveyor lines. The cache placement lifting mechanism includes a first motor, a bracket driven by the first motor to move up and down, a plurality of support trays spaced apart from each other on the bracket, a first cylinder fixed at a set height, and a push rod driven by the first cylinder to push the carriers in the support trays outward to the first conveyor line; a sensor for detecting whether there is a carrier in the support tray is provided at a position corresponding to each support tray on the bracket; A pushing mechanism for pushing the carrier to the support tray in the cache delivery lifting mechanism at the head end is provided at one end of the second conveyor line close to the PCB loading mechanism. A second barcode scanner for scanning the carrier before the carrier is pushed onto the support tray in the cache delivery lifting mechanism is provided above the second conveyor line. The carrier is scanned by the second barcode scanner to know the model of the carrier stored in the support trays on each layer in the cache delivery lifting mechanism.

2. The keyboard key touch circuit board automatic welding assembly production line according to claim 1, characterized in that: The PCB loading mechanism is provided with a first lifting mechanism for lifting the carrier on the first conveyor line upward; the FFC loading operation table, the flux brushing mechanism and the welding mechanism are all provided with a second lifting mechanism for lifting the carrier upward; the PCB loading mechanism, the FFC loading operation table, the flux brushing mechanism, the welding mechanism, the detection mechanism and the automatic unloading mechanism are all provided with a stopping mechanism for preventing the carrier from continuing to move forward; after the first lifting mechanism and the second lifting mechanism lift the carrier from the first conveyor line, a conveying channel is formed under the carrier for subsequent carriers to continue to pass through.

3. The keyboard key touch circuit board automatic welding assembly production line according to claim 1, characterized in that: The support tray includes a support base plate for carrying the carrier and limit baffles located on both sides of the support base plate and limiting the left and right positions of the carrier. The support base plate is provided with sliding rollers to increase the sliding smoothness of the carrier.

4. The keyboard key touch circuit board automatic welding assembly production line according to claim 1, characterized in that: The carrier includes a carrier plate, a limiting bearing groove arranged on the carrier plate and used to bear and limit the PCB board, and a pressure plate rotatably arranged on one side of the carrier plate and used to press the welding joint area between the PCB board and the FFC board. A QR code carrying the carrier setting information is set on the carrier plate.

5. The keyboard key touch circuit board automatic welding assembly production line according to claim 1, characterized in that: The PCB loading mechanism includes a plurality of feeding units arranged beside the first conveyor line, a plurality of PCB transfer units located directly above the first conveyor line, and a loading and handling unit whose working range covers the feeding units and the PCB transfer units.

6. The keyboard key touch circuit board automatic welding assembly production line according to claim 5, characterized in that: The feeding unit includes a first support plate, a PCB feeding tray positioned on the first support plate, and a fifth cylinder driving the first support plate to move perpendicularly to the first conveyor line between a replenishment position and a feeding position.

7. The keyboard key touch circuit board automatic welding assembly production line according to claim 5, characterized in that: The PCB transfer unit includes a third support plate located above the first conveyor line, a second cylinder fixed on the third support plate, and an adapter plate driven by the second cylinder to rotate around a horizontal axis. The adapter plate includes a first receiving plate and a second receiving plate arranged opposite to each other. The first receiving plate and the second receiving plate are both provided with a plurality of receiving grooves, and adsorption holes are provided in the receiving grooves.

8. The keyboard key touch circuit board automatic welding assembly production line according to claim 1, characterized in that: The FFC loading operation table includes an FFC feeding tray for feeding FFC boards and a scanner for scanning a QR code on a carrier.

9. The keyboard key touch circuit board automatic welding assembly production line according to claim 1, characterized in that: The automatic unloading mechanism includes a plurality of receiving trays arranged on both sides of the first conveyor line and an unloading and conveying unit whose movement range covers all the receiving trays.

10. The keyboard key touch circuit board automatic welding assembly production line according to claim 1, characterized in that: It also includes a first barcode scanning gun, which is arranged between the detection mechanism and the welding mechanism, or downstream of the detection mechanism.

11. A production method based on the assembly line according to claim 1, characterized in that: It includes the following steps: S1. The empty carrier completes automatic loading of the PCB board at the PCB loading mechanism; S2. The carrier carrying the PCB board moves along the first conveyor line to the FFC loading operation table. The operator places the FFC board on the carrier and aligns the soldering pins on the PCB board and the FFC board. Then, the pressure plate on the carrier is lowered and pressed on the soldering pins to align and overlap. S3, the carrier carrying the PCB board and the FFC board moves along the first conveyor line to the flux brushing mechanism, the welding mechanism, and the testing mechanism in sequence, respectively completing the steps of brushing flux on the welding pins, welding the pins of the PCB board and the FFC board together, and testing the welding quality of the pins; S4. Scan the vehicle to obtain model information; S5. The carrier moves to the automatic unloading mechanism, which picks up qualified products and places them in the corresponding receiving tray based on the carrier model information and the test results of the testing mechanism, and discharges unqualified products; S6: The empty carrier is received by the buffer delivery and lifting mechanism at the rear end and transferred to the second conveyor line below, and then moved to the head end by the second conveyor line; S7, the second barcode scanner scans the carrier, and then the pushing mechanism pushes the carrier to the cache placement and lifting mechanism at the head end. The system records the layer position where the scanned carrier is placed, and realizes automatic recovery of the carrier; S8. When the loading station in the PCB loading mechanism or the loading station in the FFC loading operation table becomes idle, the cache delivery and lifting mechanism at the head end releases the carrier of the corresponding model of the loading station onto the first conveyor line, and then the first conveyor line transports it to the loading station to realize automatic delivery of the carrier.

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