LCM automatic assembly equipment

Abstract

The present application relates to the technical field of electronic component assembly, and in particular to an LCM automatic assembly device, including a frame, on which a turntable assembly line with a turntable is provided, on which a plurality of positioning fixtures are arranged at intervals, and around the circumference of the turntable, a front feeding mechanism, a zebra paper feeding mechanism, a hot pressing mechanism, and a back glue sticking mechanism are sequentially arranged. The LCM automatic assembly device provided by the present application realizes the automatic assembly of a circuit board, a display screen, and a zebra paper through the front feeding mechanism, the zebra paper feeding mechanism, the hot pressing mechanism, and the back glue sticking mechanism, and can realize the synchronous crimping of the zebra paper, the display screen, and the circuit board by the cooperation of the positioning fixture and the hot pressing mechanism, thereby reducing the assembly steps and improving the assembly efficiency.

Description

[Technical field]

[0002] The present application relates to the technical field of electronic component assembly, and in particular to LCM automatic assembly equipment. [Background technology]

[0004] In the production of display electronic products, LCM assembly is an important part, which mainly involves pressing the display screen and the circuit board together through zebra paper to achieve electrical connection between the display screen and the circuit board. Due to equipment limitations, the existing LCM assembly process requires manual placement of the display screen, circuit board and zebra paper. During assembly, one end of the zebra paper is first hot-pressed to connect with the display screen, and then rotated 180° to hot-press the other end of the zebra paper to connect with the circuit board. The operation is cumbersome and inefficient. [Summary of the invention]

[0006] The purpose of the present application is to provide an LCM automatic assembly device, which realizes the automatic assembly of circuit boards, display screens and zebra paper through the front feeding mechanism, zebra paper feeding mechanism, hot pressing mechanism and back glue sticking mechanism, and can use the cooperation of the positioning fixture and the hot pressing mechanism to realize the synchronous crimping of the zebra paper, the display screen and the circuit board, thereby reducing the assembly steps and improving the assembly efficiency.

[0007] This application is implemented through the following technical solutions:

[0008] LCM automatic assembly equipment, including a frame, a turntable assembly line with a turntable is provided on the frame, a plurality of positioning fixtures are arranged at intervals on the turntable, and a front feeding mechanism, a zebra paper feeding mechanism, a hot pressing mechanism, and a back glue sticking mechanism are sequentially arranged around the circumference of the turntable; the front feeding mechanism includes a circuit board placement area for placing a circuit board, a display screen placement area for placing a display screen, and a feeding robot for transferring the circuit board and the display screen to the corresponding positioning fixtures on the turntable; the zebra paper feeding mechanism includes a zebra paper feeding robot and a back glue tearing device arranged on one side of the zebra paper feeding robot, which is used to tear off the back glue of the zebra paper and place it on the positioning fixture;

[0009] The hot pressing mechanism includes a hot pressing bracket, a hot pressing head arranged on the hot pressing bracket, a heating device connected to the hot pressing head to heat the hot pressing head, and a hot pressing driving device connected to the hot pressing head to drive the hot pressing head to press downward, so as to press the zebra paper to connect the circuit board and the display screen at the same time;

[0010] The LCM automatic assembly equipment as described above, the back glue sticking mechanism comprises: a glue sticking bracket, a lateral movement device and an LCM lifting device arranged on the glue sticking bracket, a rotating device drivingly connected to the lateral movement device, a top sticking device drivingly connected to the rotating device, a back glue suction head drivingly connected to the top sticking device, a clamping head drivingly connected to the LCM lifting device, and a back glue supply device arranged on one side of the glue sticking bracket;

[0011] The LCM lifting device is used to lift the workpiece on the positioning fixture to expose the back side of the zebra paper downward;

[0012] The transverse movement device is used to move the rotary device between the adhesive supply device and the LCM lifting device;

[0013] The rotating device is used to turn downward at the adhesive supply device, and turn upward after the adhesive suction head absorbs the adhesive;

[0014] The top sticking device is used to stick the adhesive upwards onto the back of the zebra paper below the LCM lifting device.

[0015] The LCM automatic assembly equipment as described above further includes a detection mechanism disposed on the circumferential side of the turntable and located between the hot pressing mechanism and the back glue sticking mechanism, and a product sorting mechanism electrically connected to the detection mechanism is disposed behind the back glue sticking mechanism, the detection mechanism includes a power-on device for energizing the display screen, a downward pressing driving device drivingly connected to the power-on device, and a visual recognition device for detecting display defects of the display screen, the power-on device is provided with a power-on contact, and the downward pressing driving device presses the power-on contact to the corresponding part of the circuit board to energize when being pressed downward;

[0016] The product sorting mechanism includes a qualified product area, a defective product area, and a positioning fixture.

[0017] The workpieces on the surface are sorted to the sorting robots on the qualified product area and the defective product area.

[0018] In the LCM automatic assembly equipment as described above, the positioning fixture includes a base, on which a display screen positioning hole, a circuit board positioning hole, and a zebra paper positioning hole connecting the display screen positioning hole and the circuit board positioning hole are formed, and the circuit board positioning hole is provided with a tightening device on the side away from the display screen positioning hole for pushing the circuit board in the circuit board positioning hole toward the display screen positioning hole.

[0019] In the LCM automatic assembly equipment as described above, the tightening device includes a fixing seat and a telescopic rod penetrating the fixing seat and capable of axially moving relative to the fixing seat, the telescopic rod is provided with a tightening head at one end facing the circuit board positioning hole, and a limiting cam is provided at the other end of the telescopic rod, and an elastic member is provided between the tightening head and the fixing seat to press the tightening head toward the circuit board positioning hole.

[0020] In the LCM automatic assembly equipment as described above, the zebra paper feeding mechanism also includes a hot pressing part cleaning device, which includes a cleaning frame, a downward pressing drive device arranged on the cleaning frame, a cleaning drive device arranged at the driving end of the downward pressing drive device, a cleaning head arranged at the driving end of the cleaning drive device, and a cleaning liquid supply device connected to the cleaning head to supply cleaning liquid, the downward pressing drive device drives the cleaning head to be pressed downward along with the cleaning drive device, and the cleaning drive device drives the cleaning head to reciprocate horizontally.

[0021] In the LCM automatic assembly equipment as described above, the cleaning drive device includes a connecting plate arranged at the driving end of the pressing drive device, a guide rail is arranged horizontally on the connecting plate, a slider is slidably connected to the guide rail, a rack is arranged on the upper end of the slider, and a gear meshing with the rack and a gear driving device connected to the gear to drive the gear to rotate are also arranged on the connecting plate.

[0022] The LCM automatic assembly equipment as described above, wherein the adhesive peeling device comprises a peeling bracket, a vacuum suction head arranged on the peeling bracket, a peeling manipulator and a zebra paper supply area arranged on one side of the peeling bracket, and an adhesive collection area arranged below the vacuum suction head;

[0023] The tearing robot takes out the zebra paper from the zebra paper supply area and faces the side of the zebra paper with the adhesive back to the vacuum suction head. After the vacuum suction head sucks the adhesive back, the tearing robot transfers the zebra paper to the positioning fixture and tears off the adhesive back in the process of moving away from the vacuum suction head.

[0024] The LCM automatic assembly equipment as described above, the hot pressing mechanism also includes a visual alignment device for detecting whether the zebra paper and the hot pressing part of the circuit board are aligned and a fine-tuning device for adjusting the alignment of the zebra paper and the circuit board according to the signal of the visual alignment device, the visual alignment device is arranged on the hot pressing bracket and faces below the hot pressing head, the fine-tuning device is electrically connected to the visual alignment device and is located below the positioning fixture, the fine-tuning device includes a horizontal adjuster and a longitudinal lifter arranged on the horizontal adjuster, and the upper end of the longitudinal lifter is provided with a fine-tuning chuck that can pass through the turntable and extend into the positioning fixture to clamp the circuit board for position adjustment;

[0025] There are two heat pressing heads, which are arranged in parallel with each other and face the heat pressing part of the circuit board and the heat pressing part of the display screen respectively;

[0026] An unwinding device and a tensioning device are respectively provided on both sides of the hot pressing head, and the unwinding device and the tensioning device are tensioned with heat insulating silica gel, and the heat insulating silica gel between the unwinding device and the tensioning device is located at the lower end surface of the hot pressing head, so that the hot pressing head is closely attached to the heat insulating silica gel when pressed down;

[0027] The hot pressing mechanism also includes a pressure-bearing device located below the turntable and corresponding to the hot pressing head. The pressure-bearing device includes a pressure-bearing bracket and a roller provided at the upper end of the pressure-bearing bracket and in contact with the lower surface of the turntable. The roller is in line contact with the turntable and an extension line of the contact line passes through the rotation center of the turntable so that the roller rotates as the turntable rotates.

[0028] In the LCM automatic assembly equipment as described above, the clamping head includes a vacuum suction cup and flat clamping fingers for the circuit board arranged beside the vacuum suction cup.

[0029] Compared with the prior art, this application has the following advantages:

[0030] 1. The LCM automatic assembly equipment is equipped with the front feeding mechanism and the zebra paper feeding machine.

[0031] The automatic assembly of circuit boards, display screens and zebra paper can be realized by the combination of positioning fixtures and heat pressing mechanisms, which can realize the synchronous crimping of zebra paper, display screens and circuit boards, thus reducing assembly steps and improving assembly efficiency.

[0032] 2. The positioning fixture can accurately position the circuit board, zebra paper, and display screen, which is convenient for the next step of hot pressing the zebra paper to the circuit board and the display screen at the same time. In addition, the tightening device can pre-tighten and position the circuit board longitudinally, which is convenient for the subsequent lateral adjustment of the circuit board.

[0033] 3. The adhesive peeling device peels off the adhesive of the zebra paper by combining the vacuum suction head with the manipulator. The structure is simple and reliable, easy to manufacture and has high peeling efficiency.

[0034] 4. The hot pressing part cleaning device realizes back and forth wiping through the coordinated movement of gears and racks to clean the hot pressing parts of the circuit board and the display screen. It has a simple structure, can automatically and synchronously clean the hot pressing parts of the circuit board and the display screen, and is easy to manufacture.

Brief Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 This is a three-dimensional structural diagram of the LCM automatic assembly equipment described in an embodiment of the present application.

[0038] Figure 2 This is a top view of the LCM automatic assembly equipment described in an embodiment of the present application.

[0039] Figure 3 This is a schematic diagram of the structure of the positioning fixture described in an embodiment of the present application.

[0040] Figure 4 This is a schematic diagram of the exploded structure of the positioning fixture described in an embodiment of the present application.

[0041] Figure 5 This is a schematic diagram of the structure of the hot pressing part cleaning device described in an embodiment of the present application.

[0042] Figure 6 This is a schematic diagram of the structure of the adhesive peeling device described in an embodiment of the present application.

[0043] Figure 7 This is a schematic diagram of the structure of the hot pressing mechanism described in the embodiment of the present application.

[0044] Figure 8 It is a schematic diagram of the partial structure of the hot pressing mechanism described in the embodiment of the present application.

[0045] Fig. 9 for Figure 7 Enlarged view of part A.

[0046] Fig.10 This is a schematic diagram of the structure of the detection mechanism described in the embodiment of the present application.

[0047] Fig.11 This is a schematic diagram of the structure of the adhesive backing mechanism described in an embodiment of the present application.

[0048] Fig.12 for Fig.11 Enlarged view of part B. [Specific implementation method]

[0050] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0051] like Figures 1 to 12 As shown, an embodiment of the present application proposes an LCM automatic assembly device, which is particularly used for the assembly of LCD display screens, zebra papers, and PCBA circuit boards, and includes a frame 10, on which a turntable assembly line 20 having a turntable is provided, and a plurality of positioning fixtures 30 are arranged at intervals on the turntable, and a front loading mechanism 1, a zebra paper loading mechanism 2, a hot pressing mechanism 3, a detection mechanism 4, a back glue sticking mechanism 5, and a product sorting mechanism 6 are sequentially arranged around the circumference of the turntable.

[0052] The positioning fixture 30 includes a base 301, on which a display screen positioning hole 302, a circuit board positioning hole 303, and a zebra paper positioning hole 305 connecting the display screen positioning hole 302 and the circuit board positioning hole 303 are formed. The circuit board positioning hole 303 is provided with a tightening device 304 on the side away from the display screen positioning hole 302 for pushing the circuit board in the circuit board positioning hole 303 toward the display screen positioning hole 302.

[0053] Optionally, the display screen positioning hole 302 and the circuit board positioning hole 303 are both square countersunk holes.

[0054] The tightening device 304 includes a fixing seat 3041 and a telescopic rod 3042 that penetrates the fixing seat 3041 and can perform telescopic movement relative to the fixing seat 3041. The telescopic rod 3042 is provided with a tightening head 3043 at one end facing the circuit board positioning hole 303, and a limiting convex 3044 is provided at the other end of the telescopic rod 3042. An elastic member 3045 is provided between the tightening head 3043 and the fixing seat 3041 to press the tightening head 3043 toward the circuit board positioning hole 303. Specifically, the elastic member 3045 is a compression spring.

[0055] When the positioning fixture 30 is clamped, the display screen 200 is placed in the display screen positioning hole 302, the circuit board 100 is placed in the circuit board positioning hole 303, and the zebra paper 300 is placed in the zebra paper positioning hole 305. Since there are errors in the sizes of the circuit board 100 and the display screen 200, and the alignment connection accuracy of the zebra paper 300, the display screen 200 and the circuit board 100 at the gold finger is required to be high, the connection between the display screen 200 and the zebra paper 300 adopts fixed positioning, and the circuit board 100 and the zebra paper 300 are fixed. The connection between them adopts active positioning. For the convenience of description, the direction in which the circuit board 100, the zebra paper 300, and the display screen 200 are connected in a line in this embodiment is recorded as the longitudinal direction. Correspondingly, the direction perpendicular to the longitudinal direction moved to align the gold fingers one by one is recorded as the transverse direction, that is, the transverse position of the circuit board 100 is adjustable. Therefore, the positioning fixture 30 can accurately position the circuit board 100, the zebra paper 300, and the display screen 200, so as to facilitate the next step of simultaneously hot-pressing the zebra paper 300 to the circuit board 100 and the display screen 200.

[0056] Furthermore, the tightening device 304 can perform longitudinal pre-tightening and positioning on the circuit board 100 , so as to facilitate the subsequent lateral adjustment of the circuit board 100 .

[0057] Correspondingly, through holes 3031 are provided on both sides of the circuit board positioning hole 303 for inserting pneumatic clamping fingers to adjust the position of the circuit board in the hole.

[0058] The position-limiting protrusion 3044 is threadedly connected to the telescopic rod 3042, and the distance between the position-limiting protrusion 3044 and the tightening head 3043 is adjusted by twisting the position-limiting protrusion 3044 to adjust the maximum ejection distance of the tightening head 3043. The advantage is that, on the one hand, the circuit board positioning hole 303 can adapt to circuit boards of more sizes, and on the other hand, it is convenient to adjust the tightness of the ejection when assembling the tightening device 304. A guiding inclined surface 3046 is provided on the upper part of the tightening surface of the tightening head 3043. It plays a guiding role when the circuit board is placed in the circuit board positioning hole 303.

[0059] In this embodiment, the front loading mechanism 1 includes a circuit board placement area 12 for placing the circuit board 100, a display screen placement area 13 for placing the display screen 200, and a loading robot 11 for transferring the circuit board 100 and the display screen 200 to the corresponding positioning fixture 30 of the turntable; wherein the loading robot 11 is a six-axis robot, which uses a pneumatic suction cup or a pneumatic clamp to clamp the circuit board 100 and the display screen 200.

[0060] The zebra paper feeding mechanism 2 includes a zebra paper feeding manipulator 22 and a back glue tearing device 23 arranged on one side of the zebra paper feeding manipulator 22, which is used to tear off the back glue of the zebra paper 300 and place it on the positioning fixture 30; the zebra paper feeding mechanism 2 also includes a hot pressing cleaning device 21, the hot pressing cleaning device 21 includes a cleaning frame 210, a second downward pressing drive device 211 arranged on the cleaning frame 210, a cleaning drive device 212 arranged at the driving end of the second downward pressing drive device 211, a cleaning head 213 arranged at the driving end of the cleaning drive device 212, and a cleaning liquid supply device 214 connected to the cleaning head 213 to supply cleaning liquid, the second downward pressing drive device 211 drives the cleaning head 213 to be pressed downward with the cleaning drive device 212, and the cleaning drive device 212 drives the cleaning head 213 to reciprocate horizontally. Wherein, the cleaning liquid can be alcohol. The cleaning surface of the cleaning head 213 is a sponge pad or a brush. The cleaning head 213 supplies cleaning liquid through a dispensing valve connected to the cleaning liquid supply device 214. The hot pressing part cleaning device cleans the hot pressing part of the display screen and the circuit board by driving the cleaning head to press down and then perform reciprocating wiping motion. Its action is fast and effective, and the degree of automation is high.

[0061] Correspondingly, two cleaning heads 213 are provided and arranged in parallel to simultaneously clean the hot pressing parts on the circuit board 100 and the display screen 200 .

[0062] The cleaning drive device 212 includes a connecting plate 2120 arranged at the driving end of the second pressing drive device 211, and a guide rail 2121 is horizontally arranged on the connecting plate 2120. A slider 2122 is slidably connected to the guide rail 2121. A rack 2123 is provided at the upper end of the slider 2122. The connecting plate 2120 is also provided with a gear 2124 meshing with the rack 2123 and a gear driving device 2125 connected to the gear 2124 to drive the gear 2124 to rotate.

[0063] The hot pressing part cleaning device 21 realizes back and forth wiping through the coordinated movement of gears and racks to clean the hot pressing parts of the circuit board 100 and the display screen 200. It has a simple structure, can automatically and synchronously clean the hot pressing parts of the circuit board 100 and the display screen 200, and is easy to manufacture.

[0064] Furthermore, the adhesive peeling device 23 includes a peeling bracket 230, a vacuum suction head 231 disposed on the peeling bracket 230, a peeling manipulator 232 disposed on one side of the peeling bracket 230, a zebra paper supply area 233, and an adhesive collection area 234 disposed below the vacuum suction head 231; the peeling manipulator 232 takes out the zebra paper 300 from the zebra paper supply area 233 and faces the side of the zebra paper 300 with adhesive to the vacuum suction head 231, and after the vacuum suction head 231 sucks the adhesive, the peeling manipulator 232 transfers the zebra paper 300 to the positioning fixture 30 and peels off the adhesive in the process of moving away from the vacuum suction head 231. The vacuum suction head 231 is a metal flat head hole connected to a vacuum generator. The peeling manipulator 232 is a six-axis manipulator that uses a pneumatic suction cup for clamping.

[0065] The adhesive peeling device 23 peels off the adhesive of the zebra paper 300 by combining the vacuum suction head 231 with a robot, and has a simple and reliable structure, is easy to manufacture, and has a high peeling efficiency.

[0066] The cross-sectional area of ​​the suction hole of the vacuum suction head 231 is 1 / 20 to 1 / 10 of the area of ​​the zebra paper 300. The cross-sectional area of ​​the suction hole of the vacuum suction head 231 is relatively small, and can provide suction force to the point, especially when applying force to the edge of the adhesive backing of the zebra paper 300, because the air at the edge flows between the zebra paper 300 and the adhesive backing, tearing it off is faster and more labor-saving.

[0067] The vacuum suction head 231 is driven and connected with a suction head pneumatic switch, which is used to control the vacuum suction head 231 to stop sucking after the back glue is torn off, so as to drop the torn back glue.

[0068] In this embodiment, the hot pressing mechanism 3 includes a hot pressing bracket 3a, a hot pressing head 31 arranged on the hot pressing bracket 3a, a heating device connected to the hot pressing head 31 to heat the hot pressing head 31, and a hot pressing driving device 33 connected to the hot pressing head 31 to drive the hot pressing head 31 to press downward. The hot pressing head 31 is provided with two, and the two hot pressing heads 31 are arranged in parallel at an interval and are respectively facing the hot pressing part of the circuit board 100 and the hot pressing part of the display screen 200, so as to press the zebra paper 300 to connect the circuit board 100 and the display screen 200 at the same time.

[0069] The heat pressing mechanism 3 can heat press the zebra paper 300 to connect the circuit board 100 and the display screen 200 synchronously, thereby reducing assembly steps and improving assembly efficiency.

[0070] The hot pressing mechanism 3 also includes a visual alignment device 34 for detecting whether the hot pressing parts of the zebra paper 300 and the circuit board 100 are aligned, and a fine-tuning device 35 for adjusting the alignment of the zebra paper 300 and the circuit board 100 according to the signal of the visual alignment device 34. The visual alignment device 34 is arranged on the hot pressing bracket 3a and faces the bottom of the hot pressing head 31. The fine-tuning device 35 is electrically connected to the visual alignment device 34 and is located below the positioning fixture 30. The fine-tuning device 35 includes a horizontal adjuster 351 and a longitudinal lifter 352 arranged on the horizontal adjuster 351. The upper end of the longitudinal lifter 352 is provided with a fine-tuning clamp 353 that can pass through the turntable and extend into the positioning fixture 30 to clamp the circuit board 100 for position adjustment.

[0071] The longitudinal lifter 352 drives the fine-tuning chuck 353 to extend upward into the through hole 3031 of the positioning fixture 30, and adjusts the lateral position of the circuit board 100 through the horizontal adjuster 351. The circuit board positioning hole 303 reserves a gap for fine-tuning by the fine-tuning device 35, and the gap is 1-3mm, and the fine-tuning device 35 overcomes the friction force of the pre-tightening of the pressing device 304 to perform fine-tuning. The fine-tuning device 35 is used in conjunction with the visual alignment device 34 to make the relative position of the circuit board 100 and the zebra paper 300 more accurate, which is conducive to ensuring product quality.

[0072] An unwinding device 36 and a tensioning device 37 are respectively provided on both sides of the hot pressing head 31. The unwinding device 36 and the tensioning device 37 are tensioned with heat insulating silica gel 38. The heat insulating silica gel 38 between the unwinding device 36 and the tensioning device 37 is located at the lower end surface of the hot pressing head 31, so that the hot pressing head 31 is closely attached to the heat insulating silica gel 38 when pressed down. Through the heat insulating silica gel 38, the hot pressing head 31 can indirectly heat the hot pressing part, which can effectively prevent the hot pressing head 31 from directly contacting the zebra paper and heating it to damage the zebra paper.

[0073] The hot pressing mechanism 3 also includes a pressure-bearing device 39 located below the turntable and corresponding to the hot pressing head 31. The pressure-bearing device 39 includes a pressure-bearing bracket 391 and a roller 392 provided at the upper end of the pressure-bearing bracket 391 and in contact with the lower surface of the turntable. The roller 392 is in line contact with the turntable and the extension line of the contact line passes through the rotation center of the turntable so that the roller 392 rotates with the turntable.

[0074] When the hot pressing head 31 of the hot pressing mechanism 3 is pressed down, it generates downward pressure on the turntable. The pressure-bearing device 39 can effectively offset the downward pressure of the hot pressing mechanism 3, making the hot pressing operation of the hot pressing mechanism 3 more stable, thereby ensuring the quality of the hot pressing connection between the zebra paper 300 and the circuit board 100 and the display screen 200.

[0075] The detection mechanism 4 includes a power supply device 41 for powering the display screen, a first pressing driving device 42 drivingly connected to the power supply device 41, and a visual recognition device 43 for detecting display defects of the display screen. The power supply device 41 is provided with a power supply contact, and when the first pressing driving device 42 is pressed downward, the power supply contact is pressed toward the corresponding part of the circuit board 100 to power on.

[0076] Specifically, the energized contact is a conductive metal. The visual recognition device 43 obtains the display status of the display screen through a camera, and uses visual recognition technology to identify display defects such as light leakage and incomplete display when the display screen is displayed.

[0077] The adhesive backing mechanism 5 includes an adhesive backing supply device 51 for providing adhesive backing and an adhesive backing manipulator 52 for pressing the adhesive backing onto the back side of the zebra paper 300; the adhesive backing mechanism 5 includes: an adhesive backing support 51, a lateral movement device 52 and an LCM lifting device 53 arranged on the adhesive backing support 51, a rotating device 54 drivingly connected to the lateral movement device 52, a top sticking device 55 drivingly connected to the rotating device 54, an adhesive backing suction head 56 drivingly connected to the top sticking device 55, a clamping head 57 drivingly connected to the LCM lifting device 53, and an adhesive backing supply device 58 arranged on one side of the adhesive backing support 51; wherein the LCM lifting device 53 is used to lift the workpiece on the positioning fixture 30 to expose the back side of the zebra paper 300 downward;

[0078] The lateral movement device 52 is used to move the rotating device 54 between the adhesive supply device 58 and the LCM lifting device 53; the rotating device 54 is used to turn down at the adhesive supply device 58, and turn up after the adhesive suction head 56 absorbs the adhesive; the top sticking device 55 is used to stick the adhesive upward to the back of the zebra paper 300 under the LCM lifting device 53. The adhesive suction head 56 is a pneumatic vacuum suction cup.

[0079] Since the surface of the zebra paper 300 to be pasted with adhesive is at the bottom, the LCM module is lifted to a certain height by the LCM lifting device 53, and then the lateral movement device 52 moves the adhesive suction head 56 to the adhesive supply device 58, the rotary device 54 drives the adhesive suction head 56 to flip downward and is driven by the top pasting device 55 to suck the adhesive downward and then flip upward, then the lateral movement device 52 drives the rotary device 54 and the adhesive suction head 56 to move below the LCM lifting device 53, and the top pasting device 55 upwardly pastes the adhesive to the bottom of the zebra paper 300. The adhesive pasting mechanism 5 has a simple structure, can effectively automate the adhesive pasting operation of the zebra paper, and significantly reduce the labor intensity.

[0080] The clamping head 57 includes a vacuum suction cup 571 and a circuit board flat clamping finger 572 disposed beside the vacuum suction cup 571. The vacuum suction cup 571 is used to hold the display screen 200, and the flat clamping finger 572 is used to clamp the circuit board 100. Under the simultaneous grasping of the vacuum suction cup 571 and the circuit board flat clamping finger 572, the assembled circuit board 100, the display screen 200 and the zebra paper 300 can be stably lifted upward, which is convenient for the adhesive backing operation.

[0081] The product sorting mechanism 6 includes a qualified product area 61, a defective product area 62, and a sorting robot 63 for sorting the workpieces on the positioning fixture 30 to the qualified product area 61 and the defective product area 62. The product sorting mechanism 6 is electrically connected to the detection mechanism 4. When the detection mechanism 4 detects a defective product, it transmits a signal to the product sorting mechanism 6. The product sorting mechanism 6 sorts the workpiece to the defective product area 62, otherwise, it sorts it to the qualified product area 61.

[0082] It should be noted that the above-mentioned driving devices can be driven by motors or cylinders. In order to better understand the technical solution of this embodiment, its assembly process is described as follows:

[0083] The LCM automatic assembly process, which uses the above-mentioned LCM automatic assembly equipment, wherein the turntable is provided with one or more positioning fixtures 30, includes the following steps:

[0084] Circuit board and display screen loading: the front loading mechanism 1 transfers the circuit board 100 and the display screen 200 to the positioning fixture 30 of the turntable;

[0085] Cleaning the hot pressing parts: Cleaning the parts of the circuit board 100 and the display screen 200 that need to be hot pressed.

[0086] Zebra paper feeding: the zebra paper feeding mechanism 2 removes the adhesive backing of the zebra paper 300 and places it on the positioning fixture 30, and makes the two ends of the zebra paper 300 overlap the hot pressing part of the circuit board 100 and the hot pressing part of the display screen 200 respectively. The hot pressing mechanism 3 simultaneously hot presses the two ends of the zebra paper 300, so that the circuit board 100 and the display screen 200 are electrically connected through the zebra paper 300, and are assembled to form an LCM module;

[0087] Power-on detection: the detection mechanism 4 powers on the LCM module after hot pressing, and detects the display status of the display screen through the visual recognition device 42, and judges the abnormal display status as a defective product, and judges the normal display status as a qualified product;

[0088] Adhesive backing: the adhesive backing mechanism 5 adheres the adhesive backing to the back of the zebra paper 300 showing the qualified LCM module.

[0089] Sorting and stacking: The product sorting mechanism 6 classifies and stacks defective products and qualified products.

[0090] The LCM automatic assembly process utilizes LCM automatic assembly equipment to achieve synchronous crimping of zebra paper, display screen and circuit board, thereby reducing assembly steps and improving assembly efficiency.

[0091] In summary, this application has but is not limited to the following beneficial effects:

[0092] 1. The LCM automatic assembly equipment is fed by the front feeding mechanism 1. Zebra paper

[0093] The mechanism 2, the heat pressing mechanism 3, and the adhesive backing mechanism 5 realize the automatic assembly of the circuit board 100, the display screen 200 and the zebra paper 300, and the positioning fixture 30 and the heat pressing mechanism 3 can be used to realize the synchronous crimping of the zebra paper, the display screen and the circuit board, thereby reducing the assembly steps and improving the assembly efficiency.

[0094] 2. The positioning fixture 30 can accurately position the circuit board 100, the zebra paper 300, and the display screen 200, so as to facilitate the next step of simultaneously hot pressing the zebra paper 300 to the circuit board 100 and the display screen 200, and the tightening device 304 can pre-tighten and position the circuit board 100 longitudinally, so as to facilitate the subsequent lateral adjustment of the circuit board 100.

[0095] 3. The adhesive peeling device 23 peels off the adhesive of the zebra paper 300 by combining the vacuum suction head 231 with a robot. The structure is simple and reliable, easy to manufacture and has high peeling efficiency.

[0096] 4. The hot pressing part cleaning device 21 realizes back and forth wiping through the coordinated movement of gears and racks to clean the hot pressing parts of the circuit board 100 and the display screen 200. It has a simple structure, can automatically and synchronously clean the hot pressing parts of the circuit board 100 and the display screen 200, and is easy to manufacture.

[0097] It should be understood that the terms "first", "second", etc. are used in this application to describe various information, but this information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information. In addition, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0098] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of this application is not limited to these descriptions. Any similarity or similarity with the method, structure, etc. of this application, or some technical deductions or replacements made based on the concept of this application should be considered as the protection scope of this application.

Claims

1. An LCM automatic assembly device, comprising a frame (10), wherein a turntable assembly line (20) having a turntable is arranged on the frame (10), characterized in that: A plurality of positioning fixtures (30) are arranged at intervals on the turntable, and a front feeding mechanism (1), a zebra paper feeding mechanism (2), a heat pressing mechanism (3), and a back glue sticking mechanism (5) are arranged in sequence around the circumference of the turntable; The front loading mechanism (1) comprises a circuit board placement area (12) for placing a circuit board (100), a display screen placement area (13) for placing a display screen (200), and a loading robot (11) for transferring the circuit board (100) and the display screen (200) to corresponding positioning fixtures (30) of the turntable; The zebra paper feeding mechanism (2) comprises a zebra paper feeding robot (22) and a back glue removal device (23) provided on one side of the zebra paper feeding robot (22), and used for removing the back glue of the zebra paper (300) and placing it on the positioning fixture (30); The hot pressing mechanism (3) comprises a hot pressing support (3a), a hot pressing head (31) arranged on the hot pressing support (3a), a heating device connected to the hot pressing head (31) for heating the hot pressing head (31), and a hot pressing driving device (33) connected to the hot pressing head (31) for driving the hot pressing head (31) to press downward, wherein the hot pressing mechanism (3) is used to press the zebra paper (300) to simultaneously connect the circuit board (100) and the display screen (200); The adhesive backing mechanism (5) comprises: an adhesive backing support (51), a lateral movement device (52) and an LCM lifting device (53) arranged on the adhesive backing support (51), a rotating device (54) drivingly connected to the lateral movement device (52), a top sticking device (55) drivingly connected to the rotating device (54), an adhesive backing suction head (56) drivingly connected to the top sticking device (55), a clamping head (57) drivingly connected to the LCM lifting device (53), and an adhesive backing supply device (58) arranged on one side of the adhesive backing support (51); The LCM lifting device (53) is used to lift the workpiece on the positioning fixture (30) to expose the back side of the zebra paper (300) downward; The traverse device (52) is used to move the rotating device (54) between the adhesive supply device (58) and the LCM lifting device (53); The rotating device (54) is used to turn downward at the adhesive supply device (58) and turn upward after the adhesive suction head (56) absorbs the adhesive; The top-sticking device (55) is used to stick the adhesive upwards onto the back of the zebra paper (300) below the LCM lifting device (53); It also includes a detection mechanism (4) disposed on the circumferential side of the turntable and located between the hot pressing mechanism (3) and the back glue sticking mechanism (5), and a product sorting mechanism (6) electrically connected to the detection mechanism (4) is disposed behind the back glue sticking mechanism (5), the detection mechanism (4) comprising a power supply device (41) for energizing the display screen, a first downward pressing driving device (42) drivingly connected to the power supply device (41), and a visual recognition device (43) for detecting display defects of the display screen, the power supply device (41) being provided with a power supply contact, and when the first downward pressing driving device (42) is pressed downward, the power supply contact is pressed toward a corresponding part of the circuit board (100) to energize; The product sorting mechanism (6) comprises a qualified product area (61), a defective product area (62), and a sorting robot (63) for sorting the workpieces on the positioning fixture (30) to the qualified product area (61) and the defective product area (62); The positioning fixture (30) comprises a base (301), the base (301) being provided with a display screen positioning hole (302), a circuit board positioning hole (303), and a zebra paper positioning hole (305) connecting the display screen positioning hole (302) and the circuit board positioning hole (303), and the circuit board positioning hole (303) being provided with a tightening device (304) for pushing the circuit board in the circuit board positioning hole (303) toward the display screen positioning hole (302) on a side away from the display screen positioning hole (302); The tightening device (304) comprises a fixing seat (3041) and a telescopic rod (3042) penetrating the fixing seat (3041) and capable of telescopic movement relative to the fixing seat (3041); the telescopic rod (3042) is provided with a tightening head (3043) at one end facing the circuit board positioning hole (303); the other end of the telescopic rod (3042) is provided with a limiting protrusion (3044); and an elastic member (3045) is provided between the tightening head (3043) and the fixing seat (3041) for pressing the tightening head (3043) in the direction of the circuit board positioning hole (303); The zebra paper feeding mechanism (2) further comprises a hot pressing section cleaning device (21), the hot pressing section cleaning device (21) comprising a cleaning frame (210), a second downward pressing drive device (211) disposed on the cleaning frame (210), a cleaning drive device (212) disposed at a driving end of the second downward pressing drive device (211), a cleaning head (213) disposed at a driving end of the cleaning drive device (212), and a cleaning liquid supply device (214) connected to the cleaning head (213) to supply cleaning liquid, the second downward pressing drive device (211) driving the cleaning head (213) to be pressed downward along with the cleaning drive device (212), and the cleaning drive device (212) driving the cleaning head (213) to perform horizontal reciprocating motion; The cleaning drive device (212) comprises a connecting plate (2120) arranged at the driving end of the second pressing drive device (211); a guide rail (2121) is transversely arranged on the connecting plate (2120); a slider (2122) is slidably connected to the guide rail (2121); a rack (2123) is arranged at the upper end of the slider (2122); the connecting plate (2120) is also provided with a gear (2124) meshing with the rack (2123) and a gear driving device (2125) connected to the gear (2124) to drive the gear (2124) to rotate.

2. The LCM automatic assembly equipment according to claim 1, characterized in that: The adhesive peeling device (23) comprises a peeling bracket (230), a vacuum suction head (231) arranged on the peeling bracket (230), a peeling robot (232) and a zebra paper supply area (233) arranged on one side of the peeling bracket (230), and an adhesive collection area (234) arranged below the vacuum suction head (231); the peeling robot (232) takes out the zebra paper (300) from the zebra paper supply area (233) and places the side of the zebra paper (300) with the adhesive facing the vacuum suction head (231); after the vacuum suction head (231) sucks the adhesive, the peeling robot (232) transfers the zebra paper (300) to the positioning fixture (30) and peels off the adhesive in the process of moving away from the vacuum suction head (231).

3. The LCM automatic assembly equipment according to any one of claims 1-2, characterized in that: The hot pressing mechanism (3) further comprises a visual alignment device (34) for detecting whether the hot pressing parts of the zebra paper (300) and the circuit board (100) are aligned, and a fine-tuning device (35) for adjusting the alignment of the zebra paper (300) and the circuit board (100) according to a signal of the visual alignment device (34), wherein the visual alignment device (34) is arranged on the hot pressing bracket (3a) and faces below the hot pressing head (31), and the fine-tuning device (35) is electrically connected to the visual alignment device (34) and is located below the positioning fixture (30), and the fine-tuning device (35) comprises a horizontal adjuster (351) and a longitudinal lifter (352) arranged on the horizontal adjuster (351), and the upper end of the longitudinal lifter (352) is provided with a fine-tuning clamp (353) that can pass through the turntable and extend into the positioning fixture (30) to clamp the circuit board (100) for position adjustment; Two heat pressing heads (31) are provided, and the two heat pressing heads (31) are arranged in parallel with each other at an interval and face the heat pressing part of the circuit board (100) and the heat pressing part of the display screen (200) respectively; An unwinding device (36) and a tensioning device (37) are respectively provided on both sides of the hot pressing head (31); the unwinding device (36) and the tensioning device (37) are tensioned with heat insulating silica gel (38); the heat insulating silica gel (38) between the unwinding device (36) and the tensioning device (37) is located on the lower end surface of the hot pressing head (31), so that the hot pressing head (31) is closely attached to the heat insulating silica gel (38) when pressed downward; The hot pressing mechanism (3) further comprises a pressure-bearing device (39) located below the turntable and corresponding to the hot pressing head (31), the pressure-bearing device (39) comprising a pressure-bearing bracket (391) and a roller (392) disposed at the upper end of the pressure-bearing bracket (391) and in contact with the lower surface of the turntable, the roller (392) being in line contact with the turntable and an extension line of the contact line passes through the rotation center of the turntable so that the roller (392) rotates as the turntable rotates.

4. The LCM automatic assembly equipment according to claim 1, characterized in that: The clamping head (57) comprises a vacuum suction cup (571) and a circuit board flat clamping finger (572) arranged beside the vacuum suction cup (571).

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