A circuit board alignment and pre-pressing device

Abstract

This utility model relates to a circuit board alignment and pre-pressing device, including an assembly indexing plate, a first clamping device, and a second clamping device. The second clamping device includes a second jaw and a second driving member for opening and closing the second jaw. A first pressure head and a second pressure head are provided on the bottom of the second driving member. The first pressure head is elastically set at the bottom of the second driving member by a spring, and the second pressure head is fixedly set at the bottom of the second driving member. Using the above technical solution, this utility model accurately places the circuit board onto the base on the assembly indexing plate using a displacement component, achieving one-time precise alignment of the circuit board's insertion holes with the base's pins. The second clamping device pre-presses both sides of the circuit board using the first and second pressure heads. The spring-connected first pressure head buffers the pressure to prevent damage to the pins, while the second pressure head provides stable pressing force, completing the snap-fit ​​pre-assembly of the circuit board and the base.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts manufacturing technology, and in particular relates to a circuit board alignment and pre-pressing device. Background Technology

[0002] Before assembling circuit boards with bases in structures such as car knob bases and electronic controller housings, multiple pre-processing operations are usually required, including: orientation detection and correction, flipping, electrostatic dust removal, and application of flux or protective oil. The purpose of these processes is to improve the reliability of subsequent soldering and product consistency.

[0003] In existing technologies, the above pretreatment is mostly completed manually or semi-automatically: operators manually place the circuit board at the flipping station, use an ion air gun to blow it clean, then manually apply oil, and finally flip it back. This method has the following drawbacks: manual operation is slow and inefficient, making it difficult to meet the needs of mass production; human factors lead to uneven oil application and incomplete flipping, affecting the soldering quality; circuit boards are prone to dust or static electricity when moving between multiple stations, causing poor solder joints; and there is a lack of online detection, making it impossible to detect circuit boards with incorrect orientation or bent pins in a timely manner. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art by providing a circuit board alignment and pre-pressing device, which solves the problems of low assembly efficiency and easy damage to pins in the prior art.

[0005] The technical solution of this utility model is as follows: A circuit board alignment and pre-pressing device includes a circuit board loading mechanism, a jig conveyor line, a plurality of jigs disposed on the jig conveyor line, an assembly indexing plate, a first clamping device, and a second clamping device; the first clamping device is disposed between the jig conveyor line and the assembly indexing plate, and the assembly indexing plate is provided with a clamp for holding the base; the first clamping device includes a first jaw and a first driving member for driving the first jaw to open and close; The second clamping device includes a second gripper and a second driving member for opening and closing the second gripper; a first pressure head and a second pressure head are provided on the bottom of the second driving member, the first pressure head is elastically disposed on the bottom of the second driving member by a spring, and the second pressure head is fixedly disposed on the bottom of the second driving member; it also includes two displacement components corresponding to the first clamping device and the second clamping device respectively, the displacement components driving the first clamping device or the second clamping device to move in the horizontal and vertical directions.

[0006] Using the above technical solution, the fixture on the jig conveyor line precisely positions the circuit board. When the fixture moves to the preset station and stops, the circuit board is in a known standard position. The first clamping device clamps the circuit board from this standard position and accurately places it on the base on the assembly indexing plate through the displacement component, so that the pins of the circuit board and the pins of the base are precisely aligned at one time. Subsequently, the second clamping device pre-presses both sides of the circuit board through the first and second pressure heads. The spring-connected first pressure head can buffer the pressure to avoid damage to the pins, and the second pressure head provides a stable pressing force to complete the snap-fit ​​pre-assembly of the circuit board and the base. The displacement component drives the first and second clamping devices to realize the automated operation of picking up, moving and pressing, realizing a fully automated process from positioning and clamping to precise alignment and then to flexible pre-pressing of the circuit board, improving assembly accuracy, yield and production efficiency.

[0007] Further features of this invention include a mounting frame. The displacement component includes a Z-axis module and an X-axis module. The X-axis module includes an X-axis drive device and an X-axis lead screw and nut assembly mounted on the mounting frame. The nut of the X-axis lead screw and nut assembly is fixedly connected to an X-axis slider. The X-axis drive device drives the X-axis slider to reciprocate linearly in the horizontal direction. The Z-axis module includes a Z-axis drive device and a Z-axis lead screw and nut assembly mounted on the X-axis slider. The nut of the Z-axis lead screw and nut assembly is fixedly connected to the Z-axis slider. The Z-axis drive device drives the Z-axis slider to reciprocate linearly in the vertical direction. The first clamping device or the second clamping device is fixedly mounted on its respective Z-axis slider.

[0008] With the above-mentioned further configuration, each clamping device is equipped with an independent X-axis module and Z-axis module, which achieve high-precision horizontal and vertical movement through the lead screw and nut pair structure. The stroke is controllable, the repeatability is high, the clamping of the circuit board is more accurate, and the two sets of displacement components can work independently or in concert to adapt to the needs of complex assembly operations.

[0009] A further feature of this invention is that the assembly indexing plate is also equipped with a first visual inspection device.

[0010] With the above-mentioned further settings, the detection device can detect the alignment of the pin and the pin hole before pre-pressing, promptly detect misalignment, avoid forced pressing due to misalignment which could cause the pin to bend or be damaged, and further improve the yield rate.

[0011] A further feature of this invention is that the fixture conveyor line is equipped with a first flipping device, an ion gun, a circuit board oiling device, and a second flipping device; the fixture moves along the fixture conveyor line and passes through the working areas of the first flipping device, the ion gun, the circuit board oiling device, and the second flipping device in sequence.

[0012] With the above-mentioned further settings, the circuit board automatically completes pre-treatment processes such as flipping, electrostatic dust removal, oiling, and flipping again on the conveyor line. The whole process is automated, which improves the consistency and efficiency of pre-treatment and provides a good foundation for subsequent welding.

[0013] A further feature of this invention is that a third vision inspection device is also provided on the fixture conveyor line, and the third vision inspection device is located between the ion air gun and the circuit board oiling device.

[0014] With the above-mentioned further configuration, the third-vision inspection device can confirm in real time whether there is a circuit board on the fixture, avoiding empty fixtures from entering the oiling process, reducing oil waste and ineffective equipment operation.

[0015] A further feature of this invention is that the circuit board loading mechanism includes a circuit board loading detection device, a circuit board loading robot, and a circuit board clamping device; the circuit board loading robot and the circuit board clamping device work together to transfer the circuit board onto the fixture.

[0016] With the above-mentioned further configuration, the loading robot is responsible for picking up materials from the feeder and inspecting them, while the clamping device is responsible for accurately placing the calibrated circuit board onto the fixture. The division of labor is clear, which improves the loading cycle time and positioning accuracy.

[0017] A further feature of this invention is as follows: the circuit board loading and inspection device includes a second vision inspection device and a circuit board calibration table; the circuit board is moved by the circuit board loading robot through the shooting area of ​​the third vision and first vision inspection device and then placed on the circuit board calibration table; the circuit board clamping device clamps the circuit board on the circuit board calibration table and moves it onto the fixture; the circuit board clamping device is correspondingly provided with a displacement component, and the circuit board clamping device is fixedly mounted on the Z-axis slider of the corresponding displacement component.

[0018] With the above-mentioned further settings, the second vision inspection device identifies the orientation and pin status of the circuit board, and works with the calibration table to correct the posture, effectively preventing circuit boards with reverse orientation or bent pins from flowing into subsequent processes and reducing the scrap rate.

[0019] A further feature of this invention is that the circuit board calibration platform has a positioning groove that matches the shape of the circuit board, and the two sides of the circuit board calibration platform are provided with relatively movable clamping parts.

[0020] With the above-mentioned further settings, the positioning groove achieves the initial positioning of the circuit board, and the clamping parts on both sides gently clamp the circuit board from both sides, so that the circuit board is adjusted to a standard posture in the plane. The structure is simple and the correction is reliable.

[0021] A further feature of this invention is that the second visual inspection device includes a horizontally mounted camera and a reflector positioned in front of the camera lens, wherein the reflector reflects the image of the circuit board onto the camera.

[0022] By further configuring the camera as described above, it is installed horizontally, and the light path is deflected by a reflector, avoiding the camera lens pointing vertically downwards at the dusty area. This significantly reduces dust accumulation, ensures long-term image clarity, and reduces maintenance frequency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present utility model; Figure 2 This is a schematic diagram of the jig conveyor line and the first clamping device in a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the circuit board loading mechanism and circuit board clamping device in a specific embodiment of this utility model; Figure 4 This is a schematic diagram of the assembly of the indexing plate and the second clamping device in a specific embodiment of the present invention; Figure 5 This is a schematic diagram of the overall structure of the first clamping device in a specific embodiment of the present invention; Figure 6 This is a front view of the second clamping device in a specific embodiment of the present invention; Figure 7 This is a schematic diagram of the circuit board clamping device in a specific embodiment of this utility model; Figure 8 This is a schematic diagram of the overall structure of the second visual detection device in a specific embodiment of this utility model.

[0024] In the diagram: 2. Assembly indexing plate; 3. Fixture conveyor line; 4. Fixture; 5. Displacement component; 6. Mounting frame; 7. Circuit board loading mechanism; 21. First vision inspection device; 31. First gripping device; 311. First gripper; 312. First drive component; 71. Circuit board loading inspection device; 711. Second vision inspection device; 712. Circuit board alignment table; 72. Circuit board loading robot; 73. Second gripping device; 731. Second gripper; 732. Second drive component; 733. First pressure head; 734. Second pressure head; 74. Circuit board gripping device; 713. First flipping device; 714. Ionizing air gun; 715. Circuit board oiling device; 716. Second flipping device; 718. Third vision inspection device. Detailed Implementation

[0025] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] It should be noted that in the description of this utility model, all directional indicators (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] like Figure 1-8 As shown, an automatic circuit board feeding and pre-processing device, namely a circuit board alignment and pre-pressing device, includes a circuit board feeding mechanism 7, a jig conveyor line 3, and a number of jigs 4 disposed on the jig conveyor line 3. The jig conveyor line 3 is a circulating conveyor line, and the jigs 4 move cyclically on the conveyor line.

[0030] The circuit board loading mechanism 7 includes a circuit board loading detection device 71, a circuit board loading robot 72, and a circuit board clamping device 74. The circuit board loading detection device 71 includes a second vision detection device 711 and a circuit board correction table 712. The second vision detection device 711 consists of a horizontally mounted camera and a reflector located in front of the lens. The reflector reflects the circuit board image to the camera. The circuit board loading robot 72 picks up or clamps the circuit board from the feeding tray. After the direction and pin status are detected by the second vision detection device 711, the qualified circuit board is placed on the circuit board correction table 712. The circuit board correction table 712 has a positioning groove that matches the shape of the circuit board and relatively movable clamping parts on both sides. The circuit board is gently clamped from both sides to correct its posture. Then, the circuit board clamping device 74 clamps the corrected circuit board onto the fixture 4 of the fixture conveyor line 3.

[0031] The fixture 4 moves along the fixture conveyor line 3, passing through the first flipping device 713 to flip the circuit board 180°, the ion air gun 714 to remove static electricity and dust, the third visual inspection device 718 to confirm that there is a circuit board on the fixture, the circuit board oiling device 715 to apply oil to the gold finger area of ​​the circuit board, and the second flipping device 716 to flip the circuit board back to its original orientation. After this pretreatment is completed, the circuit board is still located on the fixture 4.

[0032] The first flipping device 713 and the second flipping device 716 both include a gripper for holding the circuit board and a rotary drive for driving the gripper to rotate. The rotary drive can be a rotary cylinder or a motor. After the gripper holds the circuit board, it is driven by the rotary drive to flip it 180°.

[0033] The device also includes an assembly indexing plate 2, a first clamping device 31, and a second clamping device 73. The assembly indexing plate 2 is equipped with a clamp for holding the base. The first clamping device 31 is located between the fixture conveyor line 3 and the assembly indexing plate 2, and includes a first gripper 311 and a first driving member 312 for opening and closing. The first clamping device 31 clamps the pre-processed circuit board on the fixture 4 onto the clamp on the assembly indexing plate 2 with the base, and aligns the pin of the circuit board with the pin of the base. At this time, the circuit board is in an inclined state with the pin corresponding to the insertion. A first vision inspection device 21 is provided at another station of the assembly indexing plate 2. The assembly indexing plate 2 rotates to rotate the circuit board and the base assembly to the shooting area of ​​the first vision inspection device 21 for shooting and detecting the alignment of the pin and the pin hole.

[0034] The first clamping device 31, the second clamping device 73, and the circuit board clamping device 74 are each respectively provided with a displacement component 5, which is used to drive horizontal movement and vertical movement respectively. Each displacement component 5 includes a mounting frame 6, an X-axis module, and a Z-axis module. The X-axis module includes an X-axis drive device and an X-axis screw and nut pair disposed on the mounting frame 6. The nut of the X-axis screw and nut pair is fixedly connected to an X-axis slider. The X-axis drive device drives the X-axis slider to reciprocate linearly in the horizontal direction. The Z-axis module includes a Z-axis drive device and a Z-axis lead screw and nut assembly disposed on the X-axis slider. The nut of the Z-axis lead screw and nut assembly is fixedly connected to the Z-axis slider. The Z-axis drive device drives the Z-axis slider to reciprocate linearly in the vertical direction. In this embodiment, the second clamping device 73 is relatively fixedly disposed on the Z-axis slider of its corresponding displacement component 5.

[0035] Furthermore, the Z-axis module can be a cylinder, and the output end of the cylinder reciprocates linearly in the vertical direction. The cylinder is fixedly mounted on the X-axis slider. In this embodiment, the first clamping device 31 and the circuit board clamping device 74 are fixedly mounted on the output end of the cylinder corresponding to the Z-axis module.

[0036] After the alignment inspection is qualified, the assembly indexing plate 2 rotates the circuit board and base assembly to the pre-pressing position. The second clamping device 73 moves to this position under the drive of its displacement component 5. The second clamping device 73 includes a second gripper 731 and a second driving member 732 that drives its opening and closing. The bottom of the second driving member 732 is provided with a first pressure head 733 and a second pressure head 734. The first pressure head 733 is elastically set by a spring, and the second pressure head 734 is fixedly set. At the pre-pressing position, the second clamping device 73 descends, the second gripper 731 clamps the left and right sides of the circuit board, and the first pressure head 733 and the second pressure head 734 press the front and rear sides of the circuit board respectively. The elastic first pressure head 733 provides flexible pressure, and the fixedly connected second pressure head 734 provides rigid support, pressing and snapping the circuit board and the base to form a pre-assembled assembly. In this embodiment, both the first driving member 312 and the second driving member 732 are cylinders.

[0037] Finally, the second clamping device 73 can clamp and transfer the pre-assembled component to the next process, such as the welding station, to weld and fix the pre-assembled parts, thus completing the assembly.

[0038] In this embodiment, the assembly indexing plate 2 is an annular indexing table structure, including a fixed base, a rotating indexing ring rotatably disposed around the fixed base, and an indexing drive mechanism for driving the rotating indexing ring to rotate intermittently. The central area of ​​the fixed base is used to install the devices of each workstation, such as the first vision inspection device 21. Multiple clamps for holding the base are arranged circumferentially on the rotating indexing ring. The indexing drive mechanism drives the rotating indexing ring to rotate intermittently at a preset angle, so that the workpieces on the clamps pass through each workstation arranged around the fixed base in sequence.

Claims

1. A circuit board alignment and pre-pressing device, comprising a circuit board loading mechanism (7), a jig conveyor line (3), and a plurality of jigs (4) disposed on the jig conveyor line (3), characterized in that: It also includes an assembly indexing plate (2), a first clamping device (31) and a second clamping device (73); the first clamping device (31) is disposed between the jig conveyor line (3) and the assembly indexing plate (2), and the assembly indexing plate (2) is provided with a clamp for holding the base; the first clamping device (31) includes a first jaw (311) and a first driving member (312) for driving the first jaw (311) to open and close. The second gripping device (73) includes a second gripper (731) and a second driving member (732) for driving the second gripper (731) to open and close; the second driving member (732) is provided with a first pressure head (733) and a second pressure head (734) at its bottom. The first pressure head (733) is elastically disposed at the bottom of the second driving member (732) by a spring, and the second pressure head (734) is fixedly disposed at the bottom of the second driving member (732). It also includes two displacement components (5) corresponding to the first clamping device (31) and the second clamping device (73) respectively. The displacement components (5) drive the first clamping device (31) or the second clamping device (73) to move in the horizontal and vertical directions.

2. The circuit board alignment and pre-pressing device according to claim 1, characterized in that: It also includes a mounting bracket (6), the displacement component (5) includes a Z-axis module and an X-axis module, the X-axis module includes an X-axis drive device and an X-axis screw nut pair disposed on the mounting bracket (6), the nut of the X-axis screw nut pair is fixedly connected to an X-axis slider, and the X-axis drive device drives the X-axis slider to reciprocate linearly in the horizontal direction. The Z-axis module includes a Z-axis drive device mounted on the X-axis slider and a Z-axis lead screw and nut assembly. The nut of the Z-axis lead screw and nut assembly is fixedly connected to the Z-axis slider. The Z-axis drive device drives the Z-axis slider to reciprocate linearly in the vertical direction. The first clamping device (31) or the second clamping device (73) is fixedly mounted on their respective Z-axis sliders.

3. The circuit board alignment and pre-pressing device according to claim 1, characterized in that: The assembly indexing plate (2) is also equipped with a first vision inspection device (21).

4. The circuit board alignment and pre-pressing device according to claim 1, characterized in that: The fixture conveyor line (3) is equipped with a first flipping device (713), an ion gun (714), a circuit board oiling device (715), and a second flipping device (716); the fixture (4) moves along the fixture conveyor line (3) and passes through the working areas of the first flipping device (713), the ion gun (714), the circuit board oiling device (715), and the second flipping device (716) in sequence.

5. The circuit board alignment and pre-pressing device according to claim 1, characterized in that: The fixture conveyor line (3) is also equipped with a third vision inspection device (718), which is located between the ion air gun (714) and the circuit board oiling device (715).

6. The circuit board alignment and pre-pressing device according to claim 1, characterized in that: The circuit board loading mechanism (7) includes a circuit board loading detection device (71), a circuit board loading robot (72), and a circuit board clamping device (74); the circuit board loading robot (72) and the circuit board clamping device (74) work together to transfer the circuit board onto the fixture (4).

7. The circuit board alignment and pre-pressing device according to claim 6, characterized in that: The circuit board loading and inspection device (71) includes a second vision inspection device (711) and a circuit board calibration table (712); the circuit board is driven by the circuit board loading robot (72) through the shooting area of ​​the second vision inspection device (711) and then placed on the circuit board calibration table (712); the circuit board clamping device (74) clamps the circuit board on the circuit board calibration table (712) and moves it to the fixture (4).

8. The circuit board alignment and pre-pressing device according to claim 7, characterized in that: The circuit board calibration table (712) has a positioning groove that matches the shape of the circuit board, and the two sides of the circuit board calibration table (712) are provided with relatively movable clamping parts.

9. The circuit board alignment and pre-pressing device according to claim 8, characterized in that: The second visual inspection device (711) includes a horizontally mounted camera and a reflector disposed in front of the camera lens, the reflector reflecting the image of the circuit board to the camera.

10. The circuit board alignment and pre-pressing device according to claim 1, characterized in that: It also includes a mounting bracket (6), the displacement component (5) includes a Z-axis module and an X-axis module, the X-axis module includes an X-axis drive device and an X-axis screw nut pair disposed on the mounting bracket (6), the nut of the X-axis screw nut pair is fixedly connected to an X-axis slider, and the X-axis drive device drives the X-axis slider to reciprocate linearly in the horizontal direction. The Z-axis module is a cylinder. The output end of the Z-axis module reciprocates in a straight line along the vertical direction. The cylinder is fixedly mounted on the X-axis slider. The first clamping device (31) or the second clamping device (73) is relatively fixedly mounted on the cylinder output end of their respective Z-axis modules.

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