Surface-mounted LED lamp bead detection device and surface-mounted LED lamp bead detection method

Abstract

The invention discloses a surface-mounted LED lamp bead detection device and a surface-mounted LED lamp bead detection method with the surface-mounted LED lamp bead detection device.The surface-mounted LED lamp bead detection device comprises the surface-mounted LED lamp bead detection device which comprises a machine table, a portal frame, a rotating base, a ceramic suction cup and a camera, and a first guide rail is arranged on the surface of the machine table; the portal frame is transversely arranged above the machine table, the portal frame is in sliding connection with the machine table and can reciprocate in the length direction of the first guide rail, the portal frame is provided with a second guide rail, and the second guide rail is perpendicular to the first guide rail; the rotating seat is in sliding connection with the first guide rail, and the rotating seat is rotationally connected with a bearing disc; the ceramic sucking disc covers the bearing disc, and a first air duct and a second air duct are arranged in the ceramic sucking disc; the camera is slidably connected with the second guide rail. The LED lamp bead is fixed through vacuum adsorption and is matched with the rotating seat to carry out appearance defect detection on the whole LED lamp bead, repeated multi-direction assembly is not needed, and the efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of LED lamp bead manufacturing, and particularly relates to a surface-mounted LED lamp bead detection device and a surface-mounted LED lamp bead detection method. Background Art

[0003] Due to advantages such as small size, low power consumption, and high luminous efficiency, surface-mounted LED lamp beads are widely used in fields such as consumer electronics, automotive lighting, and display panels. However, during the production process of surface-mounted LED lamp beads, performance instability or failure is likely to occur due to packaging process defects (such as loose soldering points, colloid cracks, electrode oxidation, etc.). Therefore, strict detection of their appearance and reliability is required. Traditional detection methods mainly rely on manual visual inspection or semi-automatic equipment, which have problems such as low efficiency, high missed detection rate, and difficulty in multi-angle detection. Especially under high-temperature working conditions (such as in vehicle-mounted or industrial environments), the performance of LED lamp beads may change, and existing detection devices usually lack the ability to simulate the environment, making it difficult to comprehensively evaluate product reliability. In addition, traditional fixing methods (such as mechanical clamping or single-sided adsorption) are likely to cause lamp bead displacement or damage, affecting the detection accuracy. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a surface-mounted LED lamp bead detection device, which can reduce the number of assembly times and improve efficiency.

[0006] The surface-mounted LED lamp bead detection device according to the first aspect embodiment of the present invention includes a machine table, a gantry, a rotating seat, a ceramic suction cup, and a camera. A first guide rail is provided on the surface of the machine table; the gantry is horizontally arranged above the machine table, and the gantry is slidably connected to the machine table and can reciprocate along the length direction of the first guide rail. A second guide rail is provided on the gantry, and the second guide rail is perpendicular to the first guide rail; the rotating seat is slidably connected to the first guide rail, and a bearing tray is rotatably connected to the rotating seat; the ceramic suction cup covers the bearing tray, and the ceramic suction cup is internally provided with a first air duct and a second air duct. One end of the first air duct is located on the side wall of the ceramic suction cup, and the other end is located on the upper surface of the ceramic suction cup; one end of the second air duct is located on the side wall of the ceramic suction cup, and the other end is located on the lower surface of the ceramic suction cup. A negative pressure generator is connected to both ends of the first air duct and the second air duct located at one end of the ceramic suction cup; the camera is slidably connected to the second guide rail.

[0007] The surface-mounted LED lamp bead detection device according to the embodiment of the present invention has at least the following beneficial effects: It is fixed by vacuum adsorption, and in cooperation with the rotating seat, the appearance defects of the entire LED lamp bead are detected, without the need for multiple assemblies in multiple directions, improving efficiency.

[0008] According to some embodiments of the present invention, a heating plate is disposed between the ceramic suction cup and the supporting tray, and the heating plate is fixed on the supporting tray.

[0009] According to some embodiments of the present invention, a heat insulation plate is disposed between the supporting tray and the heating plate. The supporting tray is internally provided with a cooling water pipe, and two ends of the cooling water pipe are respectively provided with a water inlet joint and a water outlet joint, and the water inlet joint and the water outlet joint are disposed on the side surface of the supporting tray.

[0010] According to some embodiments of the present invention, the cooling water pipe is disposed in a meandering shape inside the supporting tray.

[0011] According to some embodiments of the present invention, fixing blocks and sliding blocks are disposed on the surface of the ceramic suction cup. The fixing blocks are fixed on the surface of the ceramic suction cup. The sliding blocks are connected with driving cylinders, and the driving cylinders are used for driving the sliding blocks to approach or move away from the fixing blocks. One end of the first air duct is located between the fixing blocks and the sliding blocks.

[0012] According to some embodiments of the present invention, the first air duct includes a first main air duct and a plurality of first branch air ducts. One end of each first branch air duct is communicated with the first main air duct, and the other end penetrates through to the upper surface of the ceramic suction cup; the second air duct includes a second main air duct and a plurality of second branch air ducts. One end of each second branch air duct is communicated with the second main air duct, and the other end penetrates through to the lower surface of the ceramic suction cup.

[0013] According to some embodiments of the present invention, sponge pads are disposed on the opposite sides of the sliding blocks and the fixing blocks.

[0014] According to some embodiments of the present invention, the rotating seat is provided with a rotating groove, the supporting tray is disposed inside the rotating groove, and two ends of the supporting tray are respectively rotationally connected with two sides of the rotating groove. The rotating seat is provided with a driving motor for driving the supporting tray to rotate.

[0015] According to some embodiments of the present invention, third guide rails are disposed on two sides of the machine table, and two sides of the gantry are respectively slidably connected with the third guide rails on two sides.

[0016] According to an embodiment of the second aspect of the present invention, a method for detecting a surface-mounted LED lamp bead is used for the surface-mounted LED lamp bead detecting device according to the embodiment of the first aspect. A first negative pressure generator is connected to the first air duct, and a second negative pressure generator is connected to the second air duct. The method includes the following steps: Step 1: Place the ceramic suction cup on the supporting tray, and start the second negative pressure generator to fix the ceramic suction cup and the supporting tray; Step 2: Place the surface mount LED lamp beads on the ceramic suction cup, start the first negative pressure generator, and adsorb and fix the surface mount LED lamp beads; Step 3: Move the camera, gantry, and rotating seat respectively to make the camera located above the surface mount LED lamp beads to be measured, and take a picture sample of one surface of the surface mount LED lamp beads; Step 4: The rotating seat rotates towards the first direction, so that one side of the surface mount LED lamp beads corresponds to the position of the camera, and take a picture sample of one side of the surface mount LED lamp beads; Step 5: The rotating seat rotates towards the other direction, so that one side of the surface mount LED lamp beads corresponds to the position of the camera, and take a picture sample of one side of the surface mount LED lamp beads; Step 6: Stop the first negative pressure generator, take out the surface mount LED lamp beads, flip the original surface mount LED lamp beads, and after rotating the original surface mount LED lamp beads by 90°, place them on the ceramic suction cup; Step 7: Repeat Steps 2 to 5; Step 8: Stop the first negative pressure generator, take out the surface mount LED lamp beads, and put in the next surface mount LED lamp beads to be measured.

[0017] The surface mount LED lamp bead detection method according to the embodiment of the present invention has at least the following beneficial effects: fixed by vacuum adsorption, and combined with the rotating seat to perform appearance defect detection on the entire LED lamp beads, without the need for multiple assemblies in multiple directions, improving efficiency.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0020] The following further describes the present invention in conjunction with the drawings and embodiments, where: Figure 1 is a schematic diagram of the surface mount LED lamp bead detection device according to the embodiment of the present invention; Figure 2 is a schematic diagram of the ceramic suction cup of the surface mount LED lamp bead detection device according to the embodiment of the present invention; Figure 3 is a schematic diagram of the carrier tray of the surface mount LED lamp bead detection device according to the embodiment of the present invention; Figure 4 is a schematic diagram of the machine table of the surface mount LED lamp bead detection device according to the embodiment of the present invention.

[0021] 100, machine table; 110, first guide rail; 120, third guide rail; 200, gantry; 210, second guide rail; 300, Rotating base; 310, Supporting tray; 320, Rotating groove; 330, Driving motor; 340, Cooling water pipe; 341, Water inlet joint; 342, Water outlet joint; 400, Ceramic suction cup; 410, First air duct; 411, First main air duct; 412, First branch air duct; 420, Second air duct; 421, Second main air duct; 422, Second branch air duct; 430, Fixed block; 440, Sliding block; 441, Driving cylinder; 450, Sponge pad; 500, Camera; Detailed implementation manners

[0022] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 thus should not be construed as a limitation to the present invention.

[0024] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is more than two, and understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0026] Refer to Figures 1 to 4, the chip LED lamp bead detection device of the embodiment of the present invention includes a machine table 100, a gantry 200, a rotating seat 300, a ceramic suction cup 400 and a camera 500. A first guide rail 110 is provided on the surface of the machine table 100; the gantry 200 is horizontally arranged above the machine table 100, the gantry 200 is slidably connected to the machine table 100 and can reciprocate along the length direction of the first guide rail 110. A second guide rail 210 is provided on the gantry 200, and the second guide rail 210 is perpendicular to the first guide rail 110; the rotating seat 300 is slidably connected to the first guide rail 110, and a bearing tray 310 is rotatably connected to the rotating seat 300; the ceramic suction cup 400 covers the bearing tray 310. The ceramic suction cup 400 is internally provided with a first air duct 410 and a second air duct 420. One end of the first air duct 410 is located on the side wall of the ceramic suction cup 400, and the other end is located on the upper surface of the ceramic suction cup 400; one end of the second air duct 420 is located on the side wall of the ceramic suction cup 400, and the other end is located on the lower surface of the ceramic suction cup 400. A negative pressure generator is connected to one end of the first air duct 410 and the second air duct 420 located in the ceramic suction cup 400; the camera 500 is slidably connected to the second guide rail 210.

[0027] Specifically, the moving direction of the gantry 200 and the moving direction of the camera 500 are perpendicular to each other, and the moving direction of the rotating seat 300 and the moving direction of the camera 500 are perpendicular to each other, so that a plurality of rotating seats 300 can be provided, and the LED lamp beads at different positions can be detected by the movement of the gantry 200, the camera 500 and the rotating seat 300. Among them, the ceramic suction cup 400 is used to adsorb and fix the LED lamp beads. Specifically, the negative pressure generator includes a first negative pressure generator and a second negative pressure generator. The first negative pressure generator is started, and a negative pressure is formed through the first air duct 410 to adsorb the LED lamp beads. The second negative pressure generator is started, and a negative pressure is formed through the second air duct 420 to adsorb and fix the ceramic suction cup 400 on the bearing tray 310.

[0028] Specifically, the chip LED lamp bead detection device of the embodiment of the present invention has the following chip LED lamp bead detection method, including the following steps: Step 1: Place the ceramic suction cup 400 on the bearing tray 310, start the second negative pressure generator to fix the ceramic suction cup 400 and the bearing tray 310; Step 2: Place the chip LED lamp bead on the ceramic suction cup 400, start the first negative pressure generator to adsorb and fix the chip LED lamp bead; Step 3: Move the camera 500, the gantry 200 and the rotating seat 300 respectively, so that the camera 500 is located above the chip LED lamp bead to be tested, and take a picture sample of one surface of the chip LED lamp bead; Step 4: Rotate the rotating base 300 in the first direction so that one side of the surface-mounted LED lamp bead corresponds to the position of the camera 500, and take a camera sample of one side of the surface-mounted LED lamp bead; Step 5: Rotate the rotating base 300 in the other direction so that one side of the surface-mounted LED lamp bead corresponds to the position of the camera 500, and take a camera sample of one side of the surface-mounted LED lamp bead; Step 6: Stop the first negative pressure generator, take out the surface-mounted LED lamp bead, flip the original surface-mounted LED lamp bead, and after rotating the original surface-mounted LED lamp bead by 90°, place it on the ceramic suction cup 400; Step 7: Repeat Steps 2 to 5; Step 8: Stop the first negative pressure generator, take out the surface-mounted LED lamp bead, and place the next surface-mounted LED lamp bead to be tested.

[0029] In summary, it is fixed by vacuum adsorption, and the rotating base 300 is used to detect the appearance defects of the entire LED lamp bead, without the need for multiple assemblies in multiple directions, improving efficiency.

[0030] In the above embodiment, in order to achieve the rotational connection between the bearing tray 310 and the rotating base 300, the rotating base 300 is provided with a rotating groove 320, the bearing tray 310 is built in the rotating groove 320, both ends of the bearing tray 310 are rotationally connected to both sides of the rotating groove 320 respectively, and the rotating base 300 is equipped with a driving motor 330 for driving the bearing tray 310 to rotate.

[0031] In some embodiments, a heating plate is provided between the ceramic suction cup 400 and the bearing tray 310, and the heating plate is fixed on the bearing tray 310. After the heating plate is powered on, it heats up, and the heat is conducted to the LED lamp bead through the ceramic suction cup 400 to simulate a high-temperature working environment (such as 85°C). It is possible to achieve the detection of working conditions at normal temperature and high temperature. Preferably, in order to prevent the bearing tray 310 from being damaged due to long-term heating, a heat insulation plate is provided between the bearing tray 310 and the heating plate. The bearing tray 310 is internally provided with a cooling water pipe 340. Both ends of the cooling water pipe 340 are respectively provided with a water inlet joint 341 and a water outlet joint 342, and the water inlet joint 341 and the water outlet joint 342 are arranged on the side surface of the bearing tray 310. Specifically, circulating cold water is introduced into the cooling water pipe 340 to absorb the heat of the bearing tray 310 and prevent high temperature from affecting the service life of the bearing of the rotating base 300 and the bearing tray 310. In addition, the cooling system can keep the temperature of the bearing tray 310 stable within ±2°C to avoid positioning deviation caused by thermal expansion.

[0032] Preferably, the cooling water pipe 340 is built in the tray 310 in a meandering shape. The meandering cooling water pipe 340 can better expand the cooling area and improve the cooling effect.

[0033] It should be noted that the surface of the ceramic suction cup 400 is provided with a fixed block 430 and a sliding block 440. The fixed block 430 is fixed on the surface of the ceramic suction cup 400. The sliding block 440 is connected to a driving cylinder 441. The driving cylinder 441 is used to drive the sliding block 440 to approach or move away from the fixed block 430. One end of the first air duct 410 is located between the fixed block 430 and the sliding block 440. The cooperation between the fixed block 430 and the sliding block 440 can initially restrict the position of the LED lamp beads. After the sliding block 440 cooperates with the fixed block 430 to clamp the LED lamp beads, the first negative pressure generator is then turned on to effectively adsorb and fix the LED lamp beads. In order to avoid damaging the LED lamp beads, a sponge pad 450 is provided on the opposite sides of the sliding block 440 and the fixed block 430.

[0034] In some embodiments, the first air duct 410 includes a first main air duct 411 and a plurality of first branch air ducts 412. One end of each first branch air duct 412 communicates with the first main air duct 411, and the other end penetrates to the upper surface of the ceramic suction cup 400; the second air duct 420 includes a second main air duct 421 and a plurality of second branch air ducts 422. One end of each second branch air duct 422 communicates with the second main air duct 421, and the other end penetrates to the lower surface of the ceramic suction cup 400. A plurality of ends for forming negative pressure are provided at both the first branch air ducts 412 and the second branch air ducts 422, which can improve the adsorption force on the LED lamp beads and the adsorption force on the tray 310, ensuring that the ceramic suction cup 400 will not fall while ensuring the placement stability of the LED lamp beads.

[0035] In some embodiments, third guide rails 120 are provided on both sides of the machine platform 100, and both sides of the gantry 200 are respectively slidably connected to the third guide rails 120 on both sides.

[0036] The embodiments of the present invention have been described in detail above with reference to the drawings. However, the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. A SMD LED lamp bead detection device, characterized in that: include: A machine platform (100) is provided with a first guide rail (110) on its surface; A gantry (200) is horizontally arranged above the machine platform (100), the gantry (200) and the machine platform (100) are slidably connected and can reciprocate along the length direction of the first guide rail (110), the gantry (200) is provided with a second guide rail (210), and the second guide rail (210) and the first guide rail (110) are arranged vertically; A rotating seat (300) is slidably connected to the first guide rail (110), and the rotating seat (300) is rotatably connected to a supporting tray (310); The ceramic suction cup (400) is covered on the supporting tray (310), and the ceramic suction cup (400) is provided with a first air duct (410) and a second air duct (420). One end of the first air duct (410) is located on the side wall of the ceramic suction cup (400), and the other end is located on the upper surface of the ceramic suction cup (400); one end of the second air duct (420) is located on the side wall of the ceramic suction cup (400), and the other end is located on the lower surface of the ceramic suction cup (400); one end of the first air duct (410) and the second air duct (420) located on the ceramic suction cup (400) are both connected to a negative pressure generator; The camera (500) is slidably connected to the second guide rail (210).

2. The SMD LED lamp bead detection device according to claim 1, characterized in that: A heating plate is provided between the ceramic suction cup (400) and the supporting tray (310), and the heating plate is fixed on the supporting tray (310).

3. The SMD LED lamp bead detection device according to claim 2, characterized in that: A heat insulation plate is provided between the support tray (310) and the heating plate, a cooling water pipe (340) is built into the support tray (310), and a water inlet joint (341) and a water outlet joint (342) are provided at both ends of the cooling water pipe (340), and the water inlet joint (341) and the water outlet joint (342) are provided on the side of the support tray (310).

4. The SMD LED lamp bead detection device according to claim 3, characterized in that: The cooling water pipe (340) is built into the support tray (310) in a meandering shape.

5. The SMD LED lamp bead detection device according to claim 1, characterized in that: A fixed block (430) and a sliding block (440) are provided on the surface of the ceramic suction cup (400); the fixed block (430) is fixed on the surface of the ceramic suction cup (400); the sliding block (440) is connected to a driving cylinder (441); the driving cylinder (441) is used to drive the sliding block (440) to move closer to or away from the fixed block (430); and one end of the first air duct (410) is located between the fixed block (430) and the sliding block (440).

6. The SMD LED lamp bead detection device according to claim 1 or 5, characterized in that: The first air duct (410) includes a first main air duct (411) and a first branch air duct (412), and a plurality of the first branch air ducts (412) are provided. One end of the first branch air duct (412) is connected to the first main air duct (411), and the other end passes through the upper surface of the ceramic suction cup (400); the second air duct (420) includes a second main air duct (421) and a second branch air duct (422), and a plurality of the second branch air ducts (422) are provided. One end of the second branch air duct (422) is connected to the second main air duct (421), and the other end passes through the lower surface of the ceramic suction cup (400).

7. The SMD LED lamp bead detection device according to claim 5, characterized in that: A sponge pad (450) is provided on one side of the sliding block (440) opposite to the fixing block (430).

8. The SMD LED lamp bead detection device according to claim 1, characterized in that: The rotating seat (300) is provided with a rotating groove (320), the supporting tray (310) is built in the rotating groove (320), the two ends of the supporting tray (310) are respectively rotatably connected to the two sides of the rotating groove (320), and the rotating seat (300) is installed with a driving motor (330) for driving the supporting tray (310) to rotate.

9. The SMD LED lamp bead detection device according to claim 1, characterized in that: The two sides of the machine platform (100) are provided with third guide rails (120), and the two sides of the gantry (200) are respectively slidably connected to the third guide rails (120) on the two sides.

10. A method for detecting patch-type LED lamp beads, characterized in that: The SMD LED lamp bead detection device according to any one of claims 1 to 8, wherein the first air duct (410) is connected to a first negative pressure generator, and the second air duct (420) is connected to a second negative pressure generator, comprises the following steps: Step 1: placing the ceramic suction cup (400) on the support tray (310), and starting the second negative pressure generator to fix the ceramic suction cup (400) and the support tray (310); Step 2: placing the SMD LED lamp bead on the ceramic suction cup (400), starting the first negative pressure generator, and adsorbing and fixing the SMD LED lamp bead; Step 3: respectively moving the camera (500), the gantry (200) and the rotating seat (300) so that the camera (500) is located above the SMD LED lamp bead to be tested, and photographing and sampling a surface of the SMD LED lamp bead; Step 4: The rotating seat (300) rotates in a first direction so that one side of the SMD LED lamp bead corresponds to the position of the camera (500), and one side of the SMD LED lamp bead is photographed and sampled; Step 5: The rotating seat (300) rotates in another direction so that one side of the SMD LED lamp bead corresponds to the position of the camera (500), and one side of the SMD LED lamp bead is photographed and sampled; Step 6: Stop the first negative pressure generator, take out the SMD LED lamp bead, turn over the original SMD LED lamp bead, rotate it 90°, and put it on the ceramic suction cup (400); Step 7: Repeat steps 2 to 5; Step 8: Stop the first negative pressure generator, take out the SMD LED lamp bead, and put in the next SMD LED lamp bead to be tested.

Images