An automatic assembly production line for knob base assemblies

Abstract

The application relates to a knob base assembly automatic assembly production line, which comprises a base feeding mechanism, a sliding block feeding mechanism, a circuit board feeding mechanism and an assembly indexing disc for assembling the knob base, a jig conveying line is arranged between the circuit board feeding mechanism and the assembly indexing disc, a plurality of jigs for placing the circuit board are arranged on the jig conveying line; the base feeding mechanism conveys the base to a station of the assembly indexing disc. By adopting the above technical scheme, the base feeding mechanism, the sliding block feeding mechanism, the circuit board feeding mechanism, the jig conveying line, the assembly indexing disc, the conveying belt device and the welding mechanism are cooperatively arranged, the first clamping device and the second clamping device are used to respectively complete the taking and placing and the pre-pressing of the circuit board, the independent feeding detection of the base, the sliding block and the circuit board and the convergence assembly of the assembly indexing disc are realized.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts manufacturing technology, and in particular relates to an automated assembly line for a knob base assembly. Background Technology

[0002] Knob base assemblies are widely used in automotive electronics, home appliances, and industrial control panels. They typically consist of three core components: a base, a slider, and a circuit board. Traditional assembly methods often involve manual or semi-automatic workstations to sequentially complete processes such as base loading, slider installation, circuit board assembly, and welding. In this mode, material flow between processes relies on manual handling, resulting in mismatched cycle times and low efficiency. Furthermore, the lack of multi-source material loading coordination control makes it impossible to achieve synchronous pre-processing and precise assembly of the base, slider, and circuit board. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides an automated assembly line for knob base assemblies, which realizes independent feeding, detection, coordinated conveying, and precise assembly of the base, slider, and circuit board, thus solving the problem of low efficiency in traditional assembly methods.

[0004] The technical solution of this invention: An automatic assembly production line for a knob base assembly includes a base feeding mechanism, a slider feeding mechanism, a circuit board feeding mechanism, and an assembly indexing plate for assembling the knob base. A fixture conveyor line is provided between the circuit board feeding mechanism and the assembly indexing plate, and a plurality of fixtures for placing the circuit board are provided on the fixture conveyor line. The base feeding mechanism conveys the base to the fixture on the assembly indexing plate for fixing. The slider feeding mechanism includes a slider feeding detection device and a slider feeding robot for conveying the slider to the base fixed by the fixture on the assembly indexing plate. 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. It also includes a welding mechanism. A conveyor belt device is provided between the assembly indexing plate and the welding mechanism. A first clamping device and a second clamping device are respectively provided on one side of the jig conveyor line and one side of the conveyor belt device. The first clamping device clamps the circuit board on the jig to the assembly indexing plate and places it on the base with the slider. The second clamping device clamps the base with the circuit board onto the conveyor belt device. The second clamping device is provided with a first pressure head and a second pressure head, which press the two sides of the circuit board respectively. The first pressure head is elastically set at the bottom of the second clamping device by a spring, and the second pressure head is integrally or fixedly set at the bottom of the second clamping device. The welding mechanism is provided with a welding device for welding and fixing the circuit board and the base.

[0005] By adopting the above technical solution, through the coordinated layout of the base feeding mechanism, slider feeding mechanism, circuit board feeding mechanism, as well as the fixture conveyor line, assembly indexing plate, conveyor belt device, and welding mechanism, and by using the first and second clamping devices to complete the picking, placing, and pre-pressing of the circuit board respectively, the independent feeding and inspection of the base, slider, and circuit board and the convergence assembly of the assembly indexing plate are realized. At the same time, the second clamping device is equipped with a first pressure head and a second pressure head, which simultaneously presses both sides of the circuit board using the transport device, ensuring the stability of the circuit board and base assembly process, and greatly improving production efficiency and product consistency.

[0006] A further feature of the present invention includes a pre-processing indexing plate. The base loading mechanism includes a base calibration device, a base loading robot for transporting the base to the base calibration device, a base visual inspection device for photographing and inspecting the base, and a base clamping device for clamping the base from the base calibration device to the pre-processing indexing plate. The pre-processing indexing plate is circumferentially equipped with a laser engraving device and a first visual inspection device. The pre-processing indexing plate drives the base to sequentially pass through the working area of ​​the laser engraving device and the working area of ​​the first visual inspection device. The base loading mechanism also includes a flipping device, which is disposed between the pre-processing indexing plate and the assembly indexing plate.

[0007] By adopting the above-mentioned further settings, a pre-processing indexing plate is set before the base enters the assembly indexing plate, and a laser engraving device and a first vision inspection device are integrated on it. This enables the automatic completion of laser marking and engraving quality inspection of the base, preventing defective products from flowing into subsequent processes. At the same time, the flipping device flips the base to the correct orientation, preparing it for subsequent oiling and slider assembly, thereby improving the automation and accuracy of base pre-processing.

[0008] A further feature of the present invention is that the assembly indexing plate is provided with an oiling device, a slider assembly station, and a camera device in sequence along its circumference; the oiling device has an oiling head for applying oil to the base; the slider loading robot transports the slider to the slider assembly station and places it on the oiled base; the rotation of the assembly indexing plate causes the base to pass through the working area of ​​the oiling device, the slider assembly station, and the camera device.

[0009] With the above-mentioned further settings, three stations are set up in sequence on the assembly indexing plate: oiling, slider installation, and camera detection. This realizes the integrated automatic operation of base oiling, slider assembly, and post-assembly reverse detection, ensuring the positional accuracy and orientation correctness of the slider assembly and reducing rework caused by reversed slider installation.

[0010] A further feature of the present invention is that the fixture conveyor line is provided with a first flipping device, an ion gun, a detection camera, a circuit board oiling device, and a second flipping device; the fixture moves cyclically along the fixture conveyor line, and the fixture drives the circuit board to pass sequentially through the working areas of the first flipping device, the ion gun, the detection camera, the circuit board oiling device, and the second flipping device; the circuit board is clamped and flipped at the first flipping device, oiled at the circuit board oiling device, and clamped and flipped back to its original orientation at the second flipping device.

[0011] By adopting the above-mentioned further settings, the circuit board is continuously pre-treated by flipping, ion blowing, oiling, and flipping again through the jig conveyor line. This effectively removes static electricity and dust from the surface of the circuit board and applies flux or protective oil to the welding surface, improving the quality and reliability of subsequent welding. At the same time, the entire process is automated, which improves the efficiency of circuit board pre-treatment.

[0012] A further feature of the present invention is that the circuit board loading and inspection device includes a third vision inspection device and a circuit board calibration table; the circuit board is driven by the circuit board loading robot through the shooting area of ​​the third vision inspection device to the circuit board calibration table; the circuit board clamping device clamps the circuit board on the circuit board calibration table onto the fixture.

[0013] By adopting the above-mentioned further settings, the circuit board is inspected for errors using a third-vision inspection device. The circuit board correction table automatically corrects the orientation, ensuring that only qualified circuit boards enter the fixture conveyor line. This avoids assembly failures caused by incorrect circuit board orientation or bent pins, and reduces the scrap rate.

[0014] A further feature of the present invention is that the slider loading detection device includes a second vision detection device; the slider loading robot moves the slider through the shooting area of ​​the second vision detection device to the assembly indexing plate.

[0015] With the above-mentioned further settings, the second vision inspection device can identify the direction, hole spacing and hole shape of the slider, which can promptly remove unqualified sliders or automatically correct the slider direction, thereby ensuring the accurate fit between the slider and the base and improving the success rate of slider assembly.

[0016] A further feature of the present invention is that the assembly indexing plate includes a fixed base and a rotating indexing ring rotatably disposed around the fixed base. The rotating indexing ring is also provided with a circuit board alignment station, an alignment detection station and a pre-pressing station in sequence along its circumference. Each of the circuit board alignment station, the alignment detection station and the pre-pressing station is provided with a clamp for holding the base. The first gripping device clamps the circuit board and aligns it on the fixture at the circuit board alignment station. A fourth vision inspection device for photographing the fixture is provided on the fixed base corresponding to the alignment inspection station. The second gripping device clamps and presses the base and circuit board at the pre-pressing station to form a pre-assembled assembly. The assembly indexing plate rotates and drives the base to pass through the functional areas of the circuit board alignment station, the alignment inspection station and the pre-pressing station in sequence.

[0017] With the above-mentioned further configuration, three stations are added to the assembly indexing plate: circuit board alignment, alignment detection, and pre-pressing. First, the first clamping device aligns the circuit board with the base pins at the circuit board alignment station. After the assembly indexing plate rotates to the alignment detection station, the fourth vision detection device confirms the alignment accuracy. Then, it rotates to the pre-pressing station, where the pressure head of the second clamping device performs pre-pressing to form a stable pre-assembled component for transport. This process effectively avoids pin bending or damage, provides accurate positioning for subsequent welding, and improves the welding yield.

[0018] A further provision of the present invention: the welding mechanism is further provided with a welding device for fixing the circuit board and the base, a post-weld inspection device for detecting the welding quality, and an oiling device for applying oil to the circuit board. The welding mechanism drives the pre-assembled components to pass sequentially through the working areas of the welding device, the post-weld inspection device, and the oiling device.

[0019] By adopting the above-mentioned further configuration, welding, post-weld inspection, and final oiling are integrated into the welding mechanism. The welding mechanism drives the pre-assembled components to complete welding, quality inspection, and moisture-proof oiling in sequence, eliminating the need for transfer between different equipment, reducing the floor space and cycle time. At the same time, online inspection can promptly remove defective welded products, ensuring the quality of the finished product.

[0020] A further provision of the present invention is that a feeding device is provided at the downstream end of the welding mechanism. After the oiling device applies oil, the finished product is moved to the feeding device, and the feeding device removes the finished product.

[0021] With the above-mentioned further configuration, the finished product is automatically removed by the unloading device, and the oiled finished product is transferred to the unloading position by the conveyor belt device, realizing unmanned operation of the entire process, saving labor and improving production cycle. A further provision of the present invention: at least one of the base visual inspection device, the second visual inspection device, and the third visual inspection device includes a camera horizontally mounted on the frame and a reflector disposed in front of the camera lens, wherein the reflector reflects the image of the workpiece to the camera.

[0022] By further configuring the camera horizontally and using a reflector to deflect the light path, the camera lens is positioned away from the area directly above where dust is flying. This significantly reduces the probability of dust falling onto the lens, decreases the need for frequent cleaning, ensures the clarity and stability of image acquisition during long-term continuous production, and extends the equipment maintenance cycle. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention; Figure 2 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 3 This is a schematic diagram of the jig conveyor line and the first clamping device in a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the pre-processing indexing plate and the base feeding mechanism in a specific embodiment of the present invention; Figure 5 This is a schematic diagram of the slider feeding mechanism in a specific embodiment of the present invention; Figure 6 This is a schematic diagram of the circuit board loading mechanism and the fixture conveyor line in a specific embodiment of the present invention; Figure 7 This is a schematic diagram of the welding mechanism in a specific embodiment of the present invention; Figure 8 This is a front view of the second gripping device in a specific embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the first clamping device in a specific embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the second visual detection device in a specific embodiment of the present invention.

[0024] In the diagram: 2. Assembly indexing plate; 3. Fixture conveyor line; 31. First gripping device; 4. Fixture; 5. Base loading mechanism; 51. Base loading robot; 52. Base calibration device; 53. Base gripping device; 54. Base vision inspection device; 57. Laser engraving device; 58. First vision inspection device; 59. Tilting device; 6. Slider loading mechanism; 60. Oiling device; 61. Second vision inspection device; 62. Slider loading robot; 63. Camera device; 7. Circuit board loading mechanism; 71. Circuit board loading inspection device; 711. Third vision inspection device; 712. Circuit board calibration table 713. First flipping device; 714. Ionizing air gun; 715. Circuit board oiling device; 716. Second flipping device; 718. Detection camera device; 72. Circuit board loading robot; 73. Second gripping device; 731. First pressure head; 732. Second pressure head; 74. Circuit board gripping device; 8. Fourth vision inspection device; 9. Welding mechanism; 91. Welding device; 10. Conveyor belt device; 11. Post-weld inspection device; 12. Oiling device; 13. Unloading device; 20. Pre-treatment indexing plate; 21. Base loading device; 211. First material transfer device; 212. Second material transfer 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 the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

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

[0027] Furthermore, in this invention, 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 invention, "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 the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If 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 the present invention.

[0029] like Figure 1-10 As shown, an automated assembly line for a knob base assembly is provided. The knob base consists of three parts: a base, a slider, and a circuit board. The production line includes a base loading mechanism 5, a slider loading mechanism 6, a circuit board loading mechanism 7, an assembly indexing plate 2, and a welding mechanism 9. A fixture conveyor line 3 is provided between the circuit board loading mechanism 7 and the assembly indexing plate 2. A cyclically moving fixture 4 is provided on the fixture conveyor line 3. The fixture 4 is used to place the circuit board. A conveyor belt device 10 is provided between the assembly indexing plate 2 and the welding mechanism 9.

[0030] Meanwhile, a first clamping device 31 and a second clamping device 73 are respectively provided on one side of the fixture conveyor line 3 and one side of the conveyor belt device 10. They are used to transport the circuit board from the fixture 4 to the assembly indexing plate 2 and to transport the pre-installed parts of the base and the circuit board onto the conveyor belt device 10. The second clamping device 73 is provided with a first pressure head 731 and a second pressure head 732. The first pressure head 731 and the second pressure head 732 correspond to the two sides of the circuit board. The first pressure head 731 is elastically set at the bottom of the second clamping device 73 by a spring, and the second pressure head 732 is integrally set with the bottom of the second clamping device 73. Both the first clamping device 31 and the second clamping device 73 include a displacement component and a cylinder gripper for driving their respective movements in the horizontal and vertical directions. Each displacement component includes a mounting frame, an X-axis module, and a Z-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 is mounted on the X-axis slider and includes a Z-axis drive device and a Z-axis lead screw and nut assembly. The nut of the Z-axis lead screw and nut assembly is fixedly connected to a Z-axis slider. The Z-axis drive device drives the Z-axis slider to reciprocate linearly in the vertical direction. The cylinder gripper of the first clamping device 31 is fixedly mounted on its corresponding Z-axis module slider. It should be noted that the Z-axis module can also be a cylinder, with its output end moving in the vertical direction, and the cylinder gripper of the first clamping device 31 is fixedly mounted on the output end of the Z-axis module. The cylinder gripper of the second gripping device 73 is fixed to its corresponding Z-axis module slider; the first pressure head 731 and the second pressure head 732 are connected and disposed at the bottom of the cylinder of the cylinder gripper.

[0031] The base loading and pre-processing: The base loading robot 51 picks up the base from the tray and transfers it to the base calibration device 52 for calibration. The base calibration device 52 has a positioning groove that matches the shape of the base and relatively movable clamping parts on both sides to clamp the base from both sides and correct the posture of the base. A base calibration device 52 is equipped with a base visual inspection device 54 between the pre-processing indexing plates 20. A base clamping device 53 clamps and moves the calibrated base, passing through the base visual inspection device 54 during the operation. Once qualified, the base is clamped onto the workstation of the pre-processing indexing plate 20. The pre-processing indexing plate 20 rotates, and a fixture for holding the base is fixedly installed on it. The pre-processing indexing plate 20, through the fixture, drives the base sequentially through the working area of ​​the laser engraving device 57 and the working area of ​​the first visual inspection device 58. The laser engraving device 57 performs laser engraving on the bottom surface of the base, such as product model, date code, etc. The first visual inspection device 58 captures the laser engraved area to determine whether the engraving is clear and complete. A flipping device 59 and a base loading device 21 are also provided between the pre-processing indexing plate 20 and the assembly indexing plate 2. The base loading device 21 includes a base loading drive and a lead screw and nut assembly driven by the base loading drive. The nut of the lead screw and nut assembly is integrally or fixedly connected to a base loading slider, which moves in the horizontal direction. The base loading slider is provided with a first vertical drive unit and a second vertical drive unit arranged in parallel. The first vertical drive unit includes a first vertical drive component and a lead screw and nut assembly driven by the first vertical drive component. The nut of the lead screw and nut assembly is fixedly connected to the first material transfer device 211. The second vertical drive unit includes a second vertical drive component and a lead screw and nut assembly driven by the second vertical drive component. The nut of the lead screw and nut assembly is fixedly connected to the second material transfer device 212. The first material transfer device 211 clamps the base that has completed laser engraving inspection to the flipping device 59, the flipping device 59 flips the base 180°, and the second material transfer device 212 transfers the flipped base from the flipping device 59 to the fixture of the assembly indexing plate 2; both the first material transfer device 211 and the second material transfer device 212 are cylinder grippers, and their actions are synchronized.

[0032] Slider loading and pre-processing: The slider loading mechanism 6 includes a slider loading detection device and a slider loading robot 62. The slider loading detection device includes a second vision detection device 61. The loading mechanism uses a pallet feeding system, which is existing technology. The slider loading robot 62 picks up or clamps the slider from the pallet and moves the slider through the shooting area of ​​the second vision detection device 61. The second vision detection device 61 captures an image of the slider, identifies the slider's direction, hole spacing, and hole shape, and sends the identification results to the control system. If the slider's direction is incorrect, the robot can adjust the direction to be qualified. The slider that passes the inspection is directly transported by the slider loading robot 62 to the slider assembly station of the assembly indexing plate 2.

[0033] Circuit board loading and pretreatment: 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 third vision detection device 711 and a circuit board correction table 712. The circuit board loading robot 72 and the circuit board clamping device 74 work together to transfer the circuit board to the fixture 4. The circuit board loading robot 72 clamps or picks up the circuit board and moves it through the shooting area of ​​the third vision detection device 711. The third vision detection device 711 detects whether the circuit board is placed backward or the pins are bent, and sends the qualified circuit board to 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 are provided on both sides to clamp the circuit board from both sides and correct the posture of the circuit board. The circuit board clamping device 74 clamps the corrected circuit board from the circuit board correction table 712 onto the fixture 4 of the fixture conveyor line 3. The circuit board clamping device 74 also includes a displacement component and a cylinder gripper for driving each to move in the horizontal and vertical directions. The displacement component includes a mounting frame, an X-axis module, and a Z-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 is mounted on the X-axis slider and is a telescopic cylinder. Its output end moves in the vertical direction, i.e., Z-axis movement. The cylinder gripper is fixedly mounted on the output end of the telescopic cylinder. The fixture 4 moves cyclically along the fixture conveyor line 3, passing through the functional areas of the following devices in sequence: First flipping device 713: clamps and flips the circuit board 180° so that the soldering surface faces upward; Ion air gun 714: blows the flipped circuit board to remove static electricity and dust; Detection camera device 718: checks whether there is a circuit board on the fixture 4; Circuit board oiling device 715: applies flux or protective oil to the solder joints or gold finger areas of the circuit board; Second flipping device 716: clamps and flips the oiled circuit board back to its original orientation. The first flipping device 713, the second flipping device 716, and the flipping device 59 mentioned above all 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 to flip 180° by the rotary drive.

[0034] The circuit board that has undergone the above pretreatment remains on the fixture 4, and is then picked up again by the first clamping device 31 and sent to the circuit board alignment station of the assembly indexing plate 2.

[0035] Assembly indexing plate process: The assembly indexing plate 2 has multiple clamps for holding parts and rotates together with the assembly indexing plate 2. When the assembly indexing plate 2 rotates, the base first reaches the working area of ​​the oiling device 60 on the clamps. The oiling device 60 has an oiling head, which corresponds to the oiling point on the base and applies lubricating grease to the base in sequence. Then the base moves to the slider assembly station, and the slider loading robot 62 places the inspected slider on the oiled base. Next, the base passes through the shooting area of ​​the camera device 63, which is used to detect whether the slider is installed backwards. Then the base enters the circuit board alignment station: the first clamping device 31 takes the pre-processed circuit board from the fixture 4 and aligns the pin holes of the circuit board with the pins on the base. This is the initial alignment. Then the base moves to the alignment detection station, and the fourth vision detection device 8 shoots the alignment of the pins and pin holes. If the deviation exceeds the allowable range, an alarm is triggered or a mark is made. After passing the test, the base enters the pre-pressing station. The second clamping device 73's second pressing head 732 engages one side of the circuit board with the base, while the first pressing head 731, through the action of a spring, presses the pin into the pin hole, thereby pressing and engaging the circuit board with the base and preventing excessive pressure on the pin and pin hole, thus forming a pre-assembled assembly. In this scheme, the second clamping device 73 is equipped with a first pressing head 731 and a second pressing head 732 for performing pre-pressing, while the first clamping device 31 is used to assist in alignment and clamping placement.

[0036] Transfer and post-processing of pre-assembled components: The second clamping device 73 clamps the pre-pressed components on the assembly indexing plate 2 onto the conveyor belt device 10. The conveyor belt device 10 transfers the pre-assembled components to the entrance of the welding mechanism 9. A calibration device is provided at the entrance to adjust the posture of the pre-assembled components so that they can be transported onto the welding mechanism 9.

[0037] The welding mechanism 9 consists of one or two adjacent indexing plates, on which a fixture for clamping pre-assembled components is mounted. It also includes a welding device 91, a post-weld inspection device 11, and an oiling device 12. The welding mechanism 9 drives the pre-assembled components sequentially through the welding device 91, the post-weld inspection device 11, and the oiling device 12, wherein: Welding device 91: Welds the pins to the circuit board pads to achieve a fixed connection between the circuit board and the base; Post-weld inspection device 11: Inspects the quality of weld joints through photographic inspection or electrical testing, and marks any non-conforming welds. Oiling device 12: Sprays moisture-proof oil onto the welded components to complete the final oiling.

[0038] A feeding device 13 is provided at the end of the welding mechanism 9. The welding mechanism 9 moves the finished product obtained after the oiling device 12 applies oil to the feeding device 13. The feeding device 13 takes out the finished product and stores it or puts it into the next production line. At the same time, for products that fail the welding inspection, the control system can record them and remove them during feeding.

[0039] In the above, the base vision inspection device 54, the second vision inspection device 61 and the third vision inspection device 711 all adopt the following structure: the camera is horizontally installed, and a reflector is set in front of the camera lens. The reflector is located directly above the workpiece being photographed, reflecting the image of the workpiece to the horizontal camera. This structure avoids the camera lens pointing vertically downwards at the dust area, significantly reducing dust adhesion and extending the cleaning cycle.

[0040] In this embodiment, the assembly indexing plate 2, the pretreatment indexing plate 20, and the welding mechanism 9 are all annular indexing table structures, 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 various workstation devices, such as oiling devices, visual inspection devices, and camera devices. 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 the various workstations arranged around the fixed base in sequence.

Claims

1. A knob base assembly automatic assembly production line, comprising a base feeding mechanism (5), a slider feeding mechanism (6), a circuit board feeding mechanism (7) and an assembly indexing disc (2) for assembling the knob base, characterized in that: A fixture conveyor line (3) is provided between the circuit board loading mechanism (7) and the assembly indexing plate (2), and a number of fixtures (4) for placing circuit boards are provided on the fixture conveyor line (3); the base loading mechanism (5) conveys the base to the clamp of the assembly indexing plate (2) and fixes it. The slider feeding mechanism (6) includes a slider feeding detection device and a slider feeding robot (62) for conveying the slider to the base where the assembly indexing plate (2) is fixed. 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). It also includes a welding mechanism (9), and a conveyor belt device (10) is provided between the assembly indexing plate (2) and the welding mechanism (9). A first clamping device (31) and a second clamping device (73) are respectively provided on one side of the jig conveyor line (3) and the other side of the conveyor belt device (10). The first clamping device (31) clamps the circuit board on the jig (4) to the assembly indexing plate (2) and places it on the base with the slider; the second clamping device (73) clamps the base with the circuit board onto the conveyor belt device (10). The second clamping device (73) is provided with a first pressing head (731) and a second pressing head (732) that press the two sides of the circuit board respectively. The first pressing head (731) is elastically set at the bottom of the second clamping device (73) by a spring, and the second pressing head (732) is integrally or fixedly set at the bottom of the second clamping device (73). The welding mechanism (9) is provided with a welding device (91) for welding and fixing the circuit board and the base.

2. An automatic assembly line for knob base assemblies as defined in claim 1, wherein It also includes a pre-processing indexing plate (20), and the base loading mechanism (5) includes a base calibration device (52), a base loading robot (51) for transporting the base to the base calibration device (52), a base vision inspection device (54) for photographing and inspecting the base, and a base clamping device (53) for clamping the base from the base calibration device (52) to the pre-processing indexing plate (20); the pre-processing indexing plate (20) is circumferentially provided with a laser engraving device (57) and a first vision inspection device (58), and the pre-processing indexing plate (20) drives the base to pass through the working area of ​​the laser engraving device (57) and the working area of ​​the first vision inspection device (58) in sequence; the base loading mechanism (5) also includes a flipping device (59), which is disposed between the pre-processing indexing plate (20) and the assembly indexing plate (2).

3. An automatic assembly line for knob base assemblies as defined in claim 2, wherein, The assembly indexing plate (2) is provided with an oiling device (60), a slider assembly station and a camera device (63) in sequence around its circumference; the oiling device (60) has an oiling head for applying oil to the base; the slider loading robot (62) transports the slider to the slider assembly station and places it on the oiled base; the assembly indexing plate (2) rotates and drives the base through the working area of ​​the oiling device (60), the slider assembly station and the camera device (63).

4. An automatic assembly line for knob base assemblies as defined in claim 1, wherein, The fixture conveyor line (3) is equipped with a first flipping device (713), an ion gun (714), a detection camera (718), a circuit board oiling device (715), and a second flipping device (716). The fixture (4) moves cyclically along the fixture conveyor line (3). The fixture (4) drives the circuit board to pass through the working areas of the first flipping device (713), the ion gun (714), the detection camera (718), the circuit board oiling device (715), and the second flipping device (716) in sequence. The circuit board is clamped and flipped at the first flipping device (713), oiled at the circuit board oiling device (715), and clamped and flipped back to its original orientation at the second flipping device (716).

5. An automatic assembly line for knob base assemblies as defined in claim 3, wherein The circuit board loading and inspection device (71) includes a third 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 third vision inspection device (711) to the circuit board calibration table (712); the circuit board clamping device (74) clamps the circuit board on the circuit board calibration table (712) to the fixture (4).

6. An automatic assembly line for knob base assemblies as defined in claim 1, wherein, The slider loading detection device includes a second vision detection device (61); the slider loading robot (62) drives the slider to move onto the assembly indexing plate (2) after passing through the shooting area of ​​the second vision detection device (61).

7. An automatic assembly line for knob base assemblies as defined in claim 1, wherein The assembly indexing plate (2) includes a fixed base and a rotating indexing ring rotatably arranged around the fixed base. The rotating indexing ring is also provided with a circuit board alignment station, an alignment detection station and a pre-pressing station in sequence in the circumferential direction. The circuit board alignment station, the alignment detection station and the pre-pressing station are all provided with clamps for holding the base. The first clamping device (31) clamps the circuit board and aligns it on the fixture at the circuit board alignment station. The fixed base corresponding to the alignment detection station is equipped with a fourth vision detection device (8) for photographing the fixture. The second clamping device (73) clamps and presses the base and circuit board at the pre-pressing station to form a pre-assembled assembly. The assembly indexing plate (2) rotates and drives the base to pass through the working areas of the circuit board alignment station, the alignment detection station and the pre-pressing station in sequence.

8. An automatic assembly line for knob base assemblies as defined in claim 7, wherein The welding mechanism (9) is also equipped with a post-weld inspection device (11) for detecting welding quality and an oiling device (12) for applying oil to the circuit board. The welding mechanism (9) drives the pre-assembled components to pass sequentially through the working areas of the welding device (91), the post-weld inspection device (11), and the oiling device (12).

9. An automatic assembly line for knob base assemblies as defined in claim 8, wherein, The welding mechanism (9) is also provided with a feeding device (13) at the end of the welding mechanism (9). After the oiling device (12) applies oil, the finished product is moved to the feeding device (13) and the feeding device (13) takes out the finished product.

10. An automatic assembly line for knob base assemblies as defined in claim 5, wherein: At least one of the base visual inspection device (54), the second visual inspection device (61), and the third 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 workpiece to the camera.

Images