A welding machine for assembling LED display screen

Abstract

This invention relates to the field of electronic processing equipment, and more particularly to a welding machine for assembling LED displays, comprising a support, a placement tray, a placement box, and a light-shielding component; the support is connected to the placement tray for placing the substrate; at least four connecting rods are fixed to the placement tray; all connecting rods are connected to a light-shielding component for blocking the light from LED beads; the light-shielding component is connected to the placement box for placing the LED beads. This invention uses the placement box and a blocking plate unit to cooperate in positioning the LED beads for welding. After the LED beads are welded onto the substrate, the placement box presses down on the LED beads for welding reinforcement until the solder paste cools and solidifies, preventing the LED beads from moving or misaligning. The blocking plate unit blocks the light from the normal LED beads, preventing the light from affecting the worker's vision and causing eye damage during the welding process; and the isolation frame isolates the normal LED beads from the welding area, preventing hot air from blowing onto the normal LED beads, melting their solder paste, and causing them to detach.

Description

Technical Field

[0001] This invention relates to the field of electronic processing equipment, and more particularly to a welding machine for assembling LED displays. Background Technology

[0002] After the LED display screen is manufactured, if some LEDs fail to light up (dead LEDs, dim LEDs), and the number of failed LEDs exceeds 3-5% of the total number of LEDs in the module, the entire module is scrapped or downgraded. If the number is less than 3-5% of the total number of LEDs in the module, the LEDs are replaced and repaired. The LEDs are soldered to the module substrate with solder paste. When removing the LEDs, the solder paste is melted with a hot air gun before replacing them with new LEDs. During the repair and replacement process, the LED display screen needs to be kept powered on to find the non-lighting LEDs. During soldering, there are many LEDs that light up densely, and the repair workers have to stare at the LED display screen for a long time. The light from the LEDs can affect their vision and even damage their eyesight. In addition, the LEDs are small, and the obstructed vision can easily cause the LEDs to be misaligned, affecting the quality of the repair. Summary of the Invention

[0003] To overcome the drawbacks of LED display screen assembly, such as the need to power on the LED display screen for repairing LED beads, the dense and dazzling light from the LED beads causing eye damage with prolonged direct viewing, and the small size of the LED beads making them prone to misalignment and affecting the quality of repair, this invention provides a welding machine for LED display screen assembly.

[0004] The technical solution is: a welding machine for assembling LED displays, including a bracket; a connecting component connected to the bracket; a hot air gun mounted on the moving part of the connecting component; and a placement tray, a placement box, and a light-shielding component; the bracket is connected to the placement tray for placing substrates; at least four connecting rods are fixedly connected to the placement tray; all connecting rods are connected to a light-shielding component for shielding the light from LED beads; the light-shielding component is connected to the placement box for placing LED beads; the light-shielding component is connected to a plurality of positioning pins for positioning the placement box; and four positioning plates are fixedly connected to the placement box; each Each positioning piece has two positioning holes; the positioning holes are adapted to the positioning pins; the placement box has several placement slots arranged in a matrix; each placement slot has a limiting protrusion on both sides to restrict the LED beads; the upper surface of the limiting protrusion is lower than the upper surface of the LED bead placed in the placement slot; a sliding frame is slidably connected to the placement box; several locking blocks are fixed to the sliding frame; each placement slot cooperates with at least one locking block; a control rod is fixed to the sliding frame to control its movement; the control rod slides with damping against the placement box, and the control rod passes from the front to the back of the placement box.

[0005] Furthermore, the connecting assembly includes: a slide rod, a slide bar, and a slide seat; two slide rods are fixedly connected to the bracket; all slide rods are slidably connected to a slide bar; and a slide seat for mounting a hot air gun is slidably connected to the slide bar.

[0006] Furthermore, the light-shielding assembly includes: a connecting frame, screw rings, and a blocking plate unit; all connecting rods are slidably connected to the connecting frame; at least two connecting rods are threaded; at least two screw rings for fixing are rotatably connected to the connecting frame; the screw rings are adapted to the threaded connecting rods; a blocking plate unit for blocking the light of the LED beads is connected to the connecting frame; the blocking plate unit consists of several longitudinally sliding vertical baffles and several transversely sliding horizontal baffles; the adjacent surfaces of the connecting frame, the longitudinal baffles, and the horizontal baffles are slidably connected; the number of longitudinal baffles is less than the number of rows of horizontal baffles, leaving gaps for the longitudinal and horizontal baffles to move.

[0007] Furthermore, it also includes an isolation frame; an isolation frame for isolating the LED beads is fixed to the underside of each vertical and horizontal baffle.

[0008] Furthermore, it also includes a gasket; the end of the control lever that protrudes from the back of the housing is fixed with a gasket.

[0009] Furthermore, it also includes lifting rods; at least four lifting rods are fixedly attached to the back of the placement box in an equidistant array for controlling its raising and lowering.

[0010] Furthermore, the top of the connecting rod is truncated cone-shaped.

[0011] Furthermore, the card block is set as a right-angled trapezoid, with the inclined surface of the trapezoid facing the sliding direction.

[0012] Furthermore, it also includes clamping feet, guide rods, clamping blocks, and elastic elements; four clamping feet for fixing placement trays are fixedly connected to the bracket; the placement trays are engaged with the clamping feet; an even number of guide rods are fixedly connected to both sides of the placement trays; all the guide rods on the same side are slidably connected to a clamping block for holding the substrate; an elastic element connects the clamping block and the guide rods.

[0013] Furthermore, the placement tray has at least two disassembly ports for easy removal of the clamped substrate.

[0014] The beneficial effects are as follows: The present invention realizes that the lamp beads are welded and positioned by the cooperation of the placement box and the blocking plate unit. After the lamp beads are welded on the substrate, the placement box presses down the lamp beads to reinforce the welding until the solder paste cools and solidifies, and prevents the lamp beads from moving or misaligning.

[0015] The blocking unit blocks the light from the normal LED beads to prevent the light from affecting the worker's vision and causing eye damage during the soldering process; and the isolation frame isolates the normal LED beads from the soldering area to prevent hot air from blowing onto the normal LED beads, melting the solder paste of the normal LED beads, and causing the normal LED beads to fall off. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the welding machine for assembling LED displays according to the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the placement disk, connecting frame, and blocking plate unit of the present invention;

[0018] Figure 3 This is an exploded view of the longitudinal and transverse baffles of the blocking plate unit of the present invention;

[0019] Figure 4 This is a three-dimensional structural diagram of the longitudinal baffle of the present invention;

[0020] Figure 5 This is a top view of the connecting frame, vertical baffle, and placement box of the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of the placement box in the raised state of the present invention;

[0022] Figure 7 This is a schematic diagram of the placement box of the present invention facing downwards;

[0023] Figure 8 This is a schematic diagram of the placement box of the present invention with the front facing upwards;

[0024] Figure 9 This is a top view of the box containing the present invention, with the front facing upwards.

[0025] Figure 10 This is a cross-sectional view of the placement box of the present invention;

[0026] Figure 11 This is a schematic diagram of the clamping block holding the substrate according to the present invention;

[0027] Figure 12 This is an exploded view of the guide rod and clamping block of the present invention.

[0028] Reference numerals: 1-Bracket, 11-Slide rod, 12-Slide bar, 13-Slide seat, 14-Hot air gun, 15-Clamping foot, 2-Placement tray, 21-Connecting rod, 22-Guide rod, 23-Clamping block, 24-Elastic element, 201-Disassembly port, 3-Connecting frame, 31-Screw ring, 4-Blocking plate unit, 41-Vertical baffle, 42-Horizontal baffle, 43-Positioning pin, 44-Isolation frame, 5-Placement box, 51-Positioning plate, 510-Positioning hole, 52-Slide frame, 53-Clamping block, 54-Control rod, 55-Panet, 56-Lifting rod, 501-Placement groove, 502-Limiting protrusion, 100-Baseboard, 200-LED bead. Detailed Implementation

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0030] Example 1: As Figures 1-10 As shown, a welding machine for assembling an LED display screen includes a bracket 1 and a connecting component connected thereto; a hot air gun 14 is installed on the movable part of the connecting component.

[0031] It also includes a placement tray 2, a placement box 5, and a light-shielding assembly; the bracket 1 is connected to the placement tray 2 for supporting the substrate 100; four connecting rods 21 are welded to the placement tray 2, and all the connecting rods 21 are connected to the light-shielding assembly, which is used to block the light emitted by the lamp beads 200; the light-shielding assembly is connected to the placement box 5, which is used to accommodate the lamp beads 200; several positioning pins 43 are also connected to the light-shielding assembly, which are used to position the placement box 5; four positioning pieces 51 are fixed to the placement box 5, and each positioning piece 51 has two positioning holes 510, which are adapted to the positioning pins 43; the placement box 5 is rectangular. The placement box 5 has several placement slots 501 arranged in an array. Each placement slot 501 has a limiting protrusion 502 on both sides. The limiting protrusion 502 is used to limit the position of the LED beads 200, and the upper surface of the limiting protrusion 502 is lower than the upper surface of the LED beads 200 in the placement slot 501. A sliding frame 52 is slidably connected to the placement box 5. Several locking blocks 53 are fixedly connected to the sliding frame 52. Each placement slot 501 corresponds to at least one locking block 53 and cooperates with it. A control rod 54 is fixedly connected to the sliding frame 52. The control rod 54 is used to drive the sliding frame 52 to move. The control rod 54 is damped and slidably engaged with the placement box 5, and the control rod 54 extends from the front to the back of the placement box 5.

[0032] The connecting components include: a slide rod 11, a slide bar 12, and a slide seat 13; two slide rods 11 are fixedly connected to the bracket 1; all slide rods 11 are slidably connected to the slide bar 12; the slide seat 13 is slidably connected to the slide bar 12; the sliding direction of the slide seat 13 is perpendicular to the sliding direction of the slide bar 12.

[0033] With the above structure, the hot air gun 14 is mounted on the sliding seat 13. When the worker operates the hot air gun 14, the hot air gun 14 will not shake due to hand tremors, thus affecting the processing quality.

[0034] The light-shielding assembly includes: a connecting frame 3, screw rings 31, and a blocking plate unit 4; all connecting rods 21 are slidably connected to the connecting frame 3; two connecting rods 21 are threaded; two screw rings 31 are rotatably connected to the connecting frame 3; the screw rings 31 are adapted to the threaded connecting rods 21; the blocking plate unit 4 is connected to the inner side of the connecting frame 3; the blocking plate unit 4 consists of several longitudinally sliding vertical baffles 41 and several transversely sliding horizontal baffles 42; the adjacent surfaces of the connecting frame 3, the longitudinal baffles 41, and the horizontal baffles 42 are slidably connected; the number of longitudinal baffles 41 is less than the number of rows of horizontal baffles 42, leaving a gap for the longitudinal baffles 41 and the horizontal baffles 42 to move.

[0035] It also includes an isolation frame 44; an isolation frame 44 is fixedly attached to the underside of each longitudinal baffle 41 and transverse baffle 42.

[0036] It also includes a gasket 55; the end of the control lever 54 that protrudes from the back of the placement box 5 is fixed with the gasket 55, and the worker can push the gasket 55 with his fingertip to move the control lever 54.

[0037] It also includes a lifting rod 56; four lifting rods 56 are fixedly attached to the back of the placement box 5 in an equidistant array.

[0038] The top of the connecting rod 21 is truncated cone-shaped, which makes it easy to insert into the connecting frame 3 and connect with the connecting frame 3.

[0039] The locking block 53 is set as a right trapezoid with the inclined surface of the trapezoid facing the sliding direction, which makes it easy to lock the LED bead 200.

[0040] The operation steps in this embodiment are as follows:

[0041] When some LED beads 200 on the substrate 100 of the produced LED screen are not lit and need to be replaced, place the substrate 100 with the mounting surface of the LED beads 200 facing upwards on the placement tray 2. Then, install the connecting frame 3 on the placement tray 2, with the connecting rod 21 passing through the connecting frame 3. The screw ring 31 is connected to the threaded connecting rod 21, and by tightening the screw ring 31, the connecting frame 3 is forced closer to the placement tray 2 and installed in place. At this time, the blocking plate unit 4 covers the LED beads 200 on the substrate 100. Then, turn on the power to the LED screen to light up the LED beads 200, distinguish the non-lit LED beads 200, and then slide the vertical baffle 41 and the horizontal baffle 42 to separate the non-lit areas. The LED beads 200 are exposed, and the vertical baffle 41 and horizontal baffle 42 cover the light from the lit LED beads 200. Then the connecting frame 3 is completely lowered, and the isolation frame 44 contacts the substrate 100, dividing the LED beads 200 into several areas. Then the worker holds the hot air gun 14, which moves left and right relative to the slider 12 via the sliding seat 13, and moves back and forth relative to the slider 11 via the slider 12. The hot air gun 14 is aimed at the unlit LED beads 200, and the hot air gun 14 is activated to heat and melt the solder paste, removing the unlit LED beads 200. The isolation frame 44 prevents the hot air from blowing onto the normal LED beads 200.

[0042] Next, the worker applies new solder paste to the pins of the corresponding substrate 100 in the area where the LED 200 was removed. Then, the worker places the placement box 5 face up and, based on the location of the removed LED 200, inserts a new LED 200 into the corresponding placement slot 501 on the placement box 5. The worker then touches the pad 55 with their fingertip, causing the pad 55 to slide, which in turn moves the control lever 54. The control lever 54 then moves the sliding bracket 52 and the locking block 53. The locking block 53 slides towards the adjacent placement slot 501, placing the LED 200 in the placement slot 501. The placement box 5 is then secured within the placement slot 501. The worker then flips the placement box 5 so that the front side faces down, ensuring the LED beads 200 face the mounting surface of the substrate 100. Next, the placement box 5 is aligned with the LED bead 200 mounting area not covered by the vertical baffle 41 and horizontal baffle 42. Then, the positioning piece 51 is aligned with the corresponding positioning pin 43, and the positioning pin 43 is inserted into the corresponding positioning hole 510, fixing the relative position of the placement box 5 and the blocking piece unit 4. First, by grasping the lifting rod 56, a gap is maintained between the placement box 5 and the substrate 100. Figure 6 In the state shown, the nozzle of the hot air gun 14 is then moved between the placement box 5 and the substrate 100 to melt the solder paste pre-coated on the pins of the substrate 100. After that, the hot air gun 14 is removed, and the placement box 5 is moved downward. The LED 200 on the placement box 5 protrudes from the limiting protrusion 502, so that the LED 200 comes into contact with the melted solder paste and is soldered onto the substrate 100. The placement box 5 presses down on the LED 200 to reinforce the soldering. After the solder paste cools and hardens, the soldering work is completed.

[0043] After the LED bead 200 is soldered, the worker first moves the control lever 54 through the shim 55, causing the sliding bracket 52 and the locking block 53 to slide and reset, releasing the locking block 53 from fixing the LED bead 200, and releasing the fixing of the placement box 5 to the LED bead 200. Then, the placement box 5 is lifted upwards until the positioning piece 51 is disengaged from the positioning pin 43. The placement box 5 is then removed, exposing the newly soldered LED bead 200. At this time, the LED screen is powered on, and the newly soldered LED bead 200 emits light normally, thus completing the replacement of the LED bead 200. Afterwards, the worker unscrews the screw ring 31, removes the connecting frame 3 from the placement tray 2, and then removes the repaired substrate 100 from the placement tray 2.

[0044] Based on the above steps, we can see that the present invention has the following effects:

[0045] The placement box 5 and the blocking plate unit 4 cooperate to solder and position the lamp bead 200. After the lamp bead 200 is soldered onto the substrate 100, the placement box 5 presses down on the lamp bead 200 to reinforce the soldering until the solder paste cools and solidifies, and to prevent the lamp bead 200 from moving or misaligning.

[0046] The blocking plate unit 4 blocks the light from the normal LED bead 200 to prevent the light from affecting the worker's vision and causing damage to the worker's eyes during the soldering process; and the isolation frame 44 isolates the normal LED bead 200 from the soldering area to prevent hot air from blowing towards the normal LED bead 200, melting the solder paste of the normal LED bead 200, and causing the normal LED bead 200 to fall off.

[0047] Example 2: Based on Example 1, such as Figure 2 , Figure 11 and Figure 12 As shown, it also includes locking feet 15, guide rods 22, clamping blocks 23, and elastic elements 24; four locking feet 15 are fixedly connected to the bracket 1; the placement plate 2 is engaged with the locking feet 15; four guide rods 22 are symmetrically distributed and fixedly connected to both sides of the placement plate 2; all the guide rods 22 on the same side are slidably connected to a clamping block 23; an elastic element 24 is connected between the clamping block 23 and the guide rods 22; the elastic element 24 is a tension spring.

[0048] The placement tray 2 has two disassembly ports 201.

[0049] The operation steps in this embodiment are as follows:

[0050] When the substrate 100 is placed on the placement tray 2, the substrate 100 pushes open the two clamping blocks 23. The clamping blocks 23 slide along the guide rod 22 and stretch the elastic member 24. After the substrate 100 contacts the placement tray 2, the substrate 100 is placed in place. Under the elastic tension of the elastic member 24, the clamping blocks 23 are forced to clamp the substrate 100, thus fixing the substrate 100 to the placement tray 2.

[0051] After replacing and soldering the faulty LED bead 200 on the substrate 100, keep the placement tray 2 and connecting frame 3 connected, and move the vertical baffle 41 and horizontal baffle 42 to cover the area where the LED bead 200 was replaced. Then, the worker lifts the placement tray 2 and connecting frame 3 upwards, separating the placement tray 2 from the clamping pin 15. Then, the placement tray 2, connecting frame 3, and substrate 100 on the placement tray 2 are rotated 180 degrees so that the LED bead 200 on the substrate 100 faces downwards, and the blocking plate unit 4 is located below the LED bead 200. Then, the placement tray 2 is shaken to test the stability of the LED bead 200 that has been re-soldered on the substrate 100. If the LED bead 200 is not soldered firmly, it will fall off the substrate 100 and fall into the isolation frame 44 on the corresponding vertical baffle 41 or horizontal baffle 42 to prevent the LED bead 200 from scattering after falling. Difficult to collect; then the worker places the flipped placement tray 2 and connecting frame 3 on the table, with the guide rod 22 supported on the table, and then unscrews the screw ring 31 to force the connecting frame 3 away from the placement tray 2. At this time, the substrate 100 is clamped and fixed on the placement tray 2 by the clamping block 23. The connecting frame 3 drives the blocking plate unit 4 and the lamp beads 200 that have fallen on the vertical baffle 41 or horizontal baffle 42 to move downward away from the substrate 100. Then the worker can check whether there are any fallen lamp beads 200 on the vertical baffle 41 or horizontal baffle 42 from the gap between the substrate 100 and the blocking plate unit 4. If there are any fallen lamp beads 200, collect them, re-solder them, and after the re-soldering is stable, remove the connecting frame 3 from the placement tray 2, and then remove the substrate 100 clamped by the clamping block 23 through the disassembly port 201.

[0052] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A welding machine for assembling an LED display screen, comprising a support (1); a connecting component connected to the support (1); and a hot air gun (14) mounted on the movable part of the connecting component; characterized in that: It also includes a placement tray (2), a placement box (5), and a light-shielding assembly; the bracket (1) is connected to the placement tray (2) for placing the substrate (100); at least four connecting rods (21) are fixed to the placement tray (2); all connecting rods (21) are connected to a light-shielding assembly for shielding the light of the LED beads (200); the light-shielding assembly is connected to the placement box (5) for placing the LED beads (200); several positioning pins (43) for positioning the placement box (5) are connected to the light-shielding assembly; four positioning pieces (51) are fixed to the placement box (5); each positioning piece (51) has two positioning holes (510); the positioning holes (510) are adapted to the positioning pins (43); the placement box (5) has Several placement slots (501) are arranged in a matrix; each placement slot (501) has a limiting protrusion (502) on both sides to limit the LED beads (200); the upper surface of the limiting protrusion (502) is lower than the upper surface of the LED beads (200) placed in the placement slot (501); a sliding frame (52) is slidably connected to the placement box (5); several locking blocks (53) are fixedly connected to the sliding frame (52); each placement slot (501) is engaged with at least one locking block (53); a control rod (54) is fixedly connected to the sliding frame (52) to control its movement; the control rod (54) slides with damping against the placement box (5), and the control rod (54) passes from the front to the back of the placement box (5).

2. The welding machine for assembling an LED display screen according to claim 1, characterized in that: The connecting components include: a slide rod (11), a slide bar (12), and a slide seat (13); two slide rods (11) are fixedly connected to the bracket (1); all slide rods (11) are slidably connected to the slide bar (12); and a slide seat (13) for mounting a hot air gun (14) is slidably connected to the slide bar (12).

3. The welding machine for assembling an LED display screen according to claim 1, characterized in that: The light-shielding assembly includes: a connecting frame (3), a screw ring (31), and a blocking plate unit (4); all connecting rods (21) are slidably connected to the connecting frame (3); at least two connecting rods (21) are threaded; at least two screw rings (31) for fixing are rotatably connected to the connecting frame (3); the screw rings (31) are adapted to the threaded connecting rods (21); the blocking plate unit (4) for blocking the light of the lamp beads (200) is connected to the connecting frame (3); the blocking plate unit (4) is composed of several longitudinally sliding vertical baffles (41) and several transversely sliding horizontal baffles (42); the adjacent surfaces of the connecting frame (3), the longitudinal baffles (41), and the horizontal baffles (42) are slidably connected; the number of longitudinal baffles (41) is less than the number of rows of horizontal baffles (42), leaving a gap for the longitudinal baffles (41) and the horizontal baffles (42) to move.

4. The welding machine for assembling an LED display screen according to claim 3, characterized in that: It also includes an isolation frame (44); an isolation frame (44) for isolating the lamp beads (200) is fixed to the underside of each vertical baffle (41) and horizontal baffle (42).

5. A welding machine for assembling an LED display screen according to any one of claims 1-4, characterized in that: It also includes a gasket (55); the control lever (54) extends out of the back of the placement box (5) and is fixed with a gasket (55).

6. The welding machine for assembling an LED display screen according to claim 5, characterized in that: It also includes lifting rods (56); at least four lifting rods (56) are fixedly attached to the back of the placement box (5) in an equidistant array for controlling its raising and lowering.

7. The welding machine for assembling an LED display screen according to claim 4, characterized in that: The top of the connecting rod (21) is truncated cone-shaped.

8. The welding machine for assembling an LED display screen according to claim 7, characterized in that: The card block (53) is set as a right trapezoid with the inclined surface of the trapezoid facing the sliding direction.

9. A welding machine for assembling an LED display screen according to claim 8, characterized in that: It also includes a locking foot (15), a guide rod (22), a clamping block (23) and an elastic element (24); four locking feet (15) for fixing the placement plate (2) are fixedly connected to the bracket (1); the placement plate (2) is engaged with the locking foot (15); an even number of guide rods (22) are fixedly connected to both sides of the placement plate (2); all the guide rods (22) on the same side are slidably connected to a clamping block (23) for clamping the substrate (100); an elastic element (24) is connected between the clamping block (23) and the guide rod (22).

10. A welding machine for assembling an LED display screen according to claim 9, characterized in that: The placement tray (2) has at least two disassembly ports (201) for easy disassembly of the clamped substrate (100).

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