Circuit board ultrasonic dust removal device

Abstract

The application relates to a circuit board ultrasonic dust removal device and relates to the technical field of dust removal devices. Mainly comprising a first transmission mechanism, a second transmission mechanism, a mechanical arm and a dust removal mechanism. The dust removal mechanism comprises a dust removal box, an ultrasonic generator and a time feedback assembly, the dust removal cavity and the transfer cavity are separated through a first electric switch and a second electric switch, and precise control is realized in cooperation with a dust suction pipeline, a soft curtain and a timing cam and a swing rod in a side box and the like structure. The application achieves the effect of efficiently removing dust on the surface of the circuit board, simultaneously ensures that the dust removal process is stable and reliable, and improves the production efficiency and product quality.

Description

Technical Field

[0001] This application relates to the field of dust removal equipment technology, and in particular to an ultrasonic dust removal device for circuit boards. Background Technology

[0002] Circuit boards, as core components of modern electronics manufacturing, undergo a complex and precise production process involving multiple stages, including processing, testing, and final stacking and storage. Cleaning the circuit board surface before stacking and storage is crucial, as it not only ensures the board's appearance quality but also directly affects its electrical performance and lifespan. Therefore, efficiently and reliably removing dust and other impurities from circuit board surfaces has become a key issue in the electronics manufacturing industry.

[0003] Currently, various technologies are widely used in the industry to solve the problem of cleaning circuit board surfaces. Ultrasonic cleaning is a common method, typically involving placing the circuit board in a specially designed cleaning chamber and utilizing the cavitation effect generated by ultrasonic vibrations to remove dust. Furthermore, to achieve automated operation, robotic arms are often used to handle the handling of circuit boards. The specific steps include the robotic arm picking up the circuit board from a transfer mechanism and placing it into the ultrasonic cleaning chamber. Additionally, to prevent damage to the circuit boards during transportation due to friction, protective covers are usually placed on the circuit board surface to reduce the potential risks from physical contact.

[0004] However, existing automated cleaning processes have significant shortcomings. Particularly in the collaborative operation of robotic arms and ultrasonic cleaning equipment, the coordination efficiency between the two is low. Because the robotic arm cannot accurately determine the operating status of the ultrasonic cleaning equipment, it may fail to receive start signals in a timely manner while waiting for cleaning to complete. Although the robotic arm can perform automated handling based on preset programs, prolonged operation can still lead to premature or delayed start-ups. This uncoordinated operation not only disrupts the continuity of automated production but also increases the frequency of human intervention, significantly reducing overall production efficiency. Summary of the Invention

[0005] To address the aforementioned problems, this application provides an ultrasonic dust removal device for circuit boards.

[0006] An ultrasonic dust removal device for circuit boards includes a first transmission mechanism, a second transmission mechanism, and a robotic arm. The second transmission mechanism is equipped with a dust removal mechanism, which includes a dust removal box. The dust removal box contains an ultrasonic generator and a timing feedback component for feeding signals back to the robotic arm.

[0007] By adopting the above technical solution, circuit boards can achieve efficient and automated dust removal in ultrasonic dust removal equipment. The setup of the first and second transmission mechanisms ensures smooth transfer of circuit boards between different processes. The ultrasonic generator inside the dust removal box effectively removes dust from the surface of the circuit boards. Simultaneously, the introduction of the real-time feedback component allows the robotic arm's movement to precisely coordinate with the dust removal process. The real-time feedback component provides signals to the robotic arm to correct its operating timing. This avoids automation interruptions caused by uncertain waiting times, thereby improving overall production efficiency and equipment synergy.

[0008] Preferably, a first switch is provided between the dust collection boxes to divide the dust collection boxes into a dust collection chamber and a transfer chamber. The second transmission mechanism includes a transmission frame, on which a plurality of driven rollers and a driving roller are provided. Both the driven rollers and the driving roller are placed inside the transfer chamber. A second switch is provided on the top of the dust collection box corresponding to the position of the transfer chamber.

[0009] By adopting the above technical solution, the circuit board can be effectively partitioned during transmission. The first switch divides the dust collection box into a dust collection chamber and a transfer chamber, achieving spatial isolation of the circuit board at different processing stages and preventing dust from spreading to untreated areas during the dust collection process. The second switch further ensures the isolation of the transfer chamber from the outside world, preventing external dust from entering the transfer chamber and ensuring the cleanliness of the circuit board during transmission. Both the driven roller and the driving roller on the transmission rack are placed inside the transfer chamber, optimizing the transmission path of the circuit board, improving transmission stability, and reducing frictional damage to the circuit board during transmission.

[0010] Preferably, the ultrasonic generator is disposed inside the dust removal chamber, and the dust removal chamber is also connected to a dust suction pipe.

[0011] By adopting the above technical solution, the ultrasonic generator is placed inside the dust removal chamber, which can use ultrasonic vibration to detach dust particles from the surface of the circuit board, achieving a highly efficient dust removal effect. At the same time, the dust removal chamber is connected to the suction pipe, which can promptly suck the detached dust into the pipe and discharge it, preventing dust from re-adhering to the circuit board, thereby improving the cleanliness and efficiency of dust removal.

[0012] Preferably, the dust removal chamber has an outward discharge port, and a soft curtain is provided at the discharge port.

[0013] By adopting the above technical solution, the soft curtain can prevent dust in the dust removal chamber from re-adhering to the surface of the dust-removed circuit board during the circuit board transmission process, while allowing the circuit board to pass smoothly through the discharge port, ensuring the dust removal effect without affecting the transmission efficiency.

[0014] Preferably, the transmission rack is further provided with a transmission platform, and the transmission platform is partially placed inside the dust removal chamber.

[0015] By adopting the above technical solution, the setting of the conveyor table can effectively extend the transmission path of the second transmission mechanism in the dust removal chamber, so that the circuit board can come into more full contact with the vibration wave generated by the ultrasonic generator during the dust removal process, thereby improving the dust removal effect.

[0016] Preferably, the dust collection box is connected to a side box, and the timing feedback component is disposed in the side box. The timing feedback component includes a timing cam, which is coaxially driven with the drive roller.

[0017] By adopting the above technical solution, efficient collaborative work between the robotic arm and the ultrasonic dust removal equipment is achieved. By placing the timing feedback component inside the side chamber and utilizing the coaxial transmission between the timing cam and the drive roller, the robotic arm's operation can be precisely controlled according to the processing progress of the circuit board in the dust removal chamber, avoiding the problem of the robotic arm starting prematurely or delayed, thereby improving the continuity and stability of automated production.

[0018] Preferably, the side box has a cavity to form a swing cavity, and a swing rod and a return spring that abuts against the swing rod are provided in the swing cavity. A push rod is fixedly provided on the swing rod, and one end of the push rod extends into the transfer cavity.

[0019] By adopting the above technical solution, coordinated control between the robotic arm and the ultrasonic dust removal equipment is achieved. The cooperation between the swing arm and the return spring in the swing chamber can generate corresponding actions according to the operating status of the transmission mechanism. After the push rod extends into the transfer chamber, it can trigger signal transmission, thereby precisely controlling the operation of the robotic arm and avoiding the premature or delayed transport of the circuit board, ensuring the continuity and stability of the automation process.

[0020] Preferably, the timing feedback component further includes a counting shaft, on which a counting rod is fixedly mounted, a first signal block and a second signal block are mounted, and a limit conductor is mounted on the swing arm.

[0021] By employing the above technical solutions, precise control of the robotic arm's operation is achieved. The cooperation between the counting shaft and the counting rod accurately records the operating status of the transmission mechanism, providing a synchronous reference signal for the robotic arm. The setting of the first and second signal blocks allows for the phased transmission of different control signals, ensuring that the robotic arm starts or stops at the appropriate time. The limit conductor on the swing arm works in conjunction with the counting rod to further improve the accuracy of signal transmission and avoid operational errors caused by signal delays or advances.

[0022] Preferably, a first friction wheel is fixedly installed on the counting shaft, and a second friction wheel is installed inside the side box, with the first friction wheel and the second friction wheel engaging in frictional transmission.

[0023] By adopting the above technical solution, the friction transmission between the first and second friction wheels can stably transmit power to the counting shaft, ensuring the accurate and reliable rotation of the counting shaft. This transmission method avoids the noise and wear problems that may occur with traditional gear transmissions, and can also compensate for manufacturing and assembly errors to a certain extent, improving the stability of equipment operation.

[0024] Preferably, the timing cam includes a first rotating surface and a second rotating surface, wherein the curvature of the second rotating surface is smaller than that of the first rotating surface.

[0025] By adopting the above technical solution, the setting of the first and second rotating surfaces of the timing cam enables precise control of the robotic arm's operation. Since the curvature of the second rotating surface is smaller than that of the first rotating surface, during the rotation of the timing cam, when the rotating surface contacts the swing arm, it can push the swing arm to oscillate back and forth, thus making the signal triggering tend to be fixed.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a time feedback component, the operating time of the robotic arm can be accurately fed back, making the collaboration between the robotic arm and the ultrasonic cleaning equipment more efficient, avoiding operation interruptions caused by untimely start signals, thereby improving the continuity and overall efficiency of automated production. 2. The ultrasonic generator, combined with the dust removal chamber design, can effectively utilize the cavitation effect to remove dust and impurities from the surface of the circuit board, ensuring cleaning effectiveness while reducing physical damage to the circuit board. 3. The setting of the first and second power switches divides the dust collection box into a dust collection chamber and a transfer chamber, realizing the spatial separation of the circuit board in different processing stages, avoiding secondary pollution from external dust during the cleaning process, and improving the reliability of cleaning. Attached Figure Description

[0027] Figure 1 This is a three-dimensional view of an ultrasonic dust removal device for circuit boards; Figure 2 This is a three-dimensional sectional view of the specific structure of the dust removal mechanism; Figure 3 It is a three-dimensional sectional view of the timing cam, the rocker arm, and the return spring; Figure 4 It is a three-dimensional view that provides real-time feedback on the specific structure of the component.

[0028] Explanation of reference numerals in the attached drawings: 1. First transmission mechanism; 2. Second transmission mechanism; 21. Transmission frame; 22. Driven roller; 23. Driven roller; 24. Conveyor table; 31. Dust collection box; 32. Dust collection chamber; 33. Discharge port; 34. Dust suction pipe; 35. Soft curtain; 36. Transfer chamber; 41. Ultrasonic generator; 51. Timing cam; 52. Swing rod; 521. Push rod; 522. Limit conductor; 53. Return spring; 54. Counting shaft; 55. Counting rod; 551. First signal block; 552. Second signal block; 56. First friction wheel; 57. Second friction wheel; 6. Side box; 71. First switch; 72. Second switch; 81. First rotating surface; 82. Second rotating surface. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0030] In the description of the invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

[0031] This application discloses an ultrasonic dust removal device for circuit boards, referring to... Figure 1 and Figure 2 The system includes a first transmission mechanism 1, a second transmission mechanism 2, and a robotic arm. The second transmission mechanism 2 is equipped with a dust removal mechanism, which includes a dust collection box 31. Inside the dust collection box 31 are an ultrasonic generator 41 and a timing feedback component for sending signals to the robotic arm. The first transmission mechanism 1 transports the circuit board to a fixed position awaiting transfer by the robotic arm. The robotic arm then sequentially transfers the circuit board towards the dust collection box 31.

[0032] A first switch 71 is provided between the dust collection boxes 31 to divide them into a dust collection chamber 32 and a transfer chamber 36. The first switch 71 is electrically controlled for opening and closing. A second switch 72 is provided on the top of the dust collection box 31 corresponding to the position of the transfer chamber 36. The second switch 72 is also electrically controlled for opening and closing. The robotic arm will first transfer the circuit board from the first transmission mechanism 1 to the transfer chamber 36 according to the process. The second switch 72 will open in coordination with the transfer of the robotic arm, so that the robotic arm can smoothly place the circuit board into the transfer chamber 36. The second transmission mechanism 2 includes a transmission frame 21, which is provided with several driven rollers 22 and one driving roller 23. The driving roller 23 is provided with textures to increase friction. Both the driven roller 22 and the driving roller 23 are placed inside the transfer chamber 36. The top of the transfer chamber 36 is sealed by the second switch 72, and the side of the transfer chamber 36 facing the dust removal chamber 32 is sealed by the first switch 71, thus forming a closed space. Circuit boards placed in the transfer chamber 36 in advance to await dust removal can reduce the possibility of further contamination from the outside. The driving roller 23 and the driven roller 22 placed in the transfer chamber 36 are used for the continued transport of the circuit boards.

[0033] An ultrasonic generator 41 is installed inside the dust removal chamber 32, which is also connected to a dust collection pipe 34. Two dust collection pipes 34 are arranged opposite each other, each leading outwards to an adsorption device and a filtration device. The adsorption device draws air from the dust removal chamber 32 and filters it through the filtration device, then introduces fresh air back into the chamber, maintaining stable air pressure and creating a continuous circulating airflow to blow out dust. A conveyor platform 24 is also installed on the conveyor frame 21. To facilitate the transport of circuit boards, part of the conveyor platform 24 is placed inside the dust removal chamber 32, and the other part is located outside. The dust removal chamber 32 has an outward-facing discharge port 33, which is fitted with a soft curtain 35. The soft curtain 35 provides a certain degree of sealing to the discharge port 33. The dust-removed circuit boards are conveyed out through the discharge port 33 by the conveyor platform 24.

[0034] Reference Figure 3 and Figure 4Because the dust collection box 31 needs to be relatively enclosed, the first switch 71 and the second switch 72 must be closed when cleaning the circuit board. Therefore, the robotic arm cannot obtain information about the processes within the dust collection box 31, leading to timing deviations during prolonged operation. To address this, a side box 6 is connected to the dust collection box 31, and a timing feedback component is installed within the side box 6 to provide signal feedback to the robotic arm. The timing feedback component includes a timing cam 51, which comprises a first rotating surface 81 and a second rotating surface 82, with the curvature of the second rotating surface 82 being smaller than that of the first rotating surface 81. The timing cam 51 is coaxially driven with the drive roller 23, meaning they share a drive shaft. This drive shaft is driven by a motor, and its rotation simultaneously rotates both the timing cam 51 and the drive roller 23. A cavity is formed inside the side box 6 to create a swing chamber. A swing rod 52 and a return spring 53 abutting against the swing rod 52 are installed within the swing chamber. The swing chamber provides sufficient space for the swing rod 52 to swing back and forth within it. The return spring 53 enables the swing rod 52 to automatically return to its original position. When the timing cam 51 starts to rotate, it has a first rotating surface 81 and a second rotating surface 82. The curvature of the second rotating surface 82 is smaller than that of the first rotating surface 81. By setting the first and second rotating surfaces 81 to abut against the end of the swing rod 52, when the end of the swing rod 52 abuts against the first rotating surface 81, due to its larger curvature, the swing rod 52 is pushed towards the return spring 53 by the timing cam 51, compressing the return spring 53. When the end of the swing rod 52 contacts the second rotating surface 82, its curvature suddenly decreases, causing the swing rod 52 to rebound towards the timing cam 51 by the return spring 53. Since the first rotating surface 81 and the second rotating surface 82 have a certain length, the swing arm 52 will swing slowly as it passes through the first rotating surface 81 or the second rotating surface 82. When the swing arm 52 passes from the first rotating surface 81 to the second rotating surface 82, the swing speed of the swing arm 52 will suddenly increase. Therefore, when the swing arm 52 moves to the position closest to or furthest from the dust removal chamber 32, there will be a slow movement process. This setting can cooperate with the robotic arm to form a waiting process for the robotic arm to place the circuit board in the transfer chamber 36, making the connection between the robotic arm and the push rod 521 smoother.

[0035] Based on the back-and-forth swing trajectory of the swing arm 52, a push rod 521 is fixedly installed on the swing arm 52. One end of the push rod 521 extends from the swing cavity into the transfer cavity 36. The push rod 521 moves with the swing arm 52, and the part of the push rod 521 that extends into the transfer cavity 36 can push the circuit board placed in the transfer cavity 36 in the direction of the push towards the dust removal cavity 32.

[0036] The timing feedback component also includes a counter axis 54, on which a counter rod 55 is fixedly mounted. A first signal block 551 and a second signal block 552 are mounted on the counter rod 55. A limit conductor 522 is mounted on the swing arm 52. The first signal block 551 and the second signal block 552 are spaced apart, with the spacing allowing the limit conductor 522 to pass between them without contacting them. In this application, each of the first signal block 551 and the second signal block 552 is connected to a circuit. The first signal block 551 and the second signal block 552 are configured as conductive conductors. When the first signal block 551 or the second signal block 552 comes into contact with the limiting conductor 522, the circuits connected to the first signal block 551 or the second signal block 552 will be turned on, so that the robotic arm receives an electrical signal generated by the circuit being turned on. Through the receipt of the electrical signal, the robotic arm can easily judge the process status in the dust removal box 31, thereby correcting the robotic arm's own running time, improving the accuracy of the robotic arm's running time, and preventing the robotic arm from deviating from the execution time during long-term operation.

[0037] A first friction wheel 56 is fixedly mounted on the counting shaft 54, and a second friction wheel 57 is also installed in the side box 6. The first friction wheel 56 and the second friction wheel 57 are driven by friction. The second friction wheel 57 is driven to rotate by a motor, and when the second friction wheel 57 rotates, it can drive the first friction wheel 56 to rotate. When the limit conductor 522 contacts the first signal block 551 and the second signal block 552, it will limit the rotation of the counting rod 55 and the counting shaft 54, preventing the first friction wheel 56 from rotating. However, since the first friction wheel 56 and the second friction wheel 57 are driven by friction, when the first friction wheel 56 cannot rotate, the motor will drive the second friction wheel 57 to slip relative to the first friction wheel 56, thus preventing the counting shaft 54 ​​from being overloaded.

[0038] The implementation principle of this application embodiment is as follows: When cleaning the circuit board by blowing dust, the first transmission mechanism 1 moves the circuit board to a predetermined position to await transfer by the robotic arm. The robotic arm first transfers the circuit board into the transfer chamber 36. The motor simultaneously drives the timing cam 51 and the active roller 23 to rotate. The swing arm 52 will repeatedly swing under the rotation of the timing cam 51, thereby causing the push rod 521 to push the circuit board onto the active roller 23. When the circuit board contacts the active roller 23, it will continue to be transported towards the dust removal chamber 32 by the active roller 23. At this time, the first switch 71 will be opened in coordination. The rotation of the active roller 23 will transfer the circuit board to the conveyor table 24, and then the conveyor table 24 will completely transport it into the dust removal chamber 32. The ultrasonic generator 41 located in the dust removal chamber 32 shakes off the fine dust attached to the circuit board and sucks it away through the suction pipe 34.

[0039] Meanwhile, after the robotic arm transports the first circuit board into the dust removal chamber 32, a new circuit board needs to be placed in the transfer chamber 36 to await dust removal. When the timing cam 51 drives the swing arm 52 to swing to the position closest to the dust removal chamber 32, the second signal block 552, through the pre-set movement trajectory of the second signal block 552, makes the second signal block 552 engage with the limit conductor 522 at the position where the swing arm 52 swings to the position closest to the dust removal chamber 32. The first friction wheel 56 and the second friction wheel 57 slip, and the circuit of the second signal block 552 is turned on. The robotic arm receives this electrical signal and can determine the position of the push rod 521 at this moment. When the circuit of the second signal block 552 is turned on, it means that the robotic arm cannot place the circuit board into the transfer chamber 36.

[0040] As the timing cam 51 continues to rotate, the push rod 521, which has completed the process of pushing the circuit board, moves toward the reset spring 53, thereby compressing the reset spring 53. During the movement of the push rod 521 toward the reset spring 53, the motor continuously drives the second friction wheel 57 to rotate, causing the first friction wheel 56 to always apply rotational force to the timing shaft 54. This causes the second signal block 552, which is attached to the limit conductor 522, to continuously receive a downward force. The movement of the push rod 521 causes the gap between the first signal block 551 and the second signal block 552 to be aligned with the limit conductor 522, thereby allowing the limit conductor 522 to pass between the first signal block 551 and the second signal block 552.

[0041] When the push rod 521 moves to its maximum extent toward the return spring 53, the first signal block 551 is driven by the position counting rod 55 to rotate one revolution and then engages with the limit conductor 522, thus completing the circuit of the first signal block 551. Upon receiving this electrical signal, the robotic arm can determine that the circuit board can be placed in the transfer cavity 36 at this moment. By sequentially sending electrical signals to the robotic arm through the first signal block 551 and the second signal block 552, the robotic arm can correct its execution timing based on the electrical signals, improving stability.

[0042] After the robotic arm places the circuit board into the transfer chamber 36, as the timing cam 51 rotates, the swing arm 52 begins to move toward the dust removal chamber 32 under the elastic force of the return spring 53, and the push rod 521 pushes the new circuit board to move, repeating the process.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A circuit board ultrasonic dust removal device, comprising a first transmission mechanism (1), a second transmission mechanism (2) and a mechanical arm, characterized in that: The second transmission mechanism (2) is provided with a dust removal mechanism, which includes a dust removal box (31) and an ultrasonic generator (41) is provided inside the dust removal box (31); A first switch (71) is provided between the dust collection boxes (31) to divide the dust collection boxes (31) into a dust collection chamber (32) and a transfer chamber (36). The second transmission mechanism (2) includes a transmission frame (21), on which a plurality of driven rollers (22) and a driving roller (23) are provided. Both the driven rollers (22) and the driving roller (23) are placed inside the transfer chamber (36). A second switch (72) is provided on the top of the dust collection box (31) corresponding to the position of the transfer chamber (36). The dust collection box (31) is connected to a side box (6), and a timing feedback component is set inside the side box (6). The timing feedback component is used to feed back signals to the robotic arm. The timing feedback component includes a timing cam (51), which is coaxially driven with the drive roller (23). The side box (6) has a cavity to form a swing cavity. The swing cavity is provided with a swing rod (52) and a return spring (53) that abuts against the swing rod (52). A push rod (521) is fixedly provided on the swing rod (52), and one end of the push rod (521) extends into the transfer cavity (36). The timing feedback component also includes a counter shaft (54), on which a counter rod (55) is fixedly mounted. A first signal block (551) and a second signal block (552) are mounted on the counter rod (55), and a limit conductor (522) is mounted on the swing arm (52). The counting shaft (54) is also fixedly provided with a first friction wheel (56), and the side box (6) is also provided with a second friction wheel (57). The first friction wheel (56) and the second friction wheel (57) are driven by friction.

2. The circuit board ultrasonic dust removing apparatus according to claim 1, wherein: The ultrasonic generator (41) is located inside the dust removal chamber (32), which is also connected to a dust suction pipe (34).

3. The ultrasonic dust removal device for circuit boards according to claim 1, characterized in that: The dust removal chamber (32) is provided with a discharge port (33) and a soft curtain (35) is provided at the discharge port (33).

4. The ultrasonic dust removal device for circuit boards according to claim 1, characterized in that: The transmission rack (21) is also provided with a transmission platform (24), and part of the transmission platform (24) is placed inside the dust removal chamber (32).

5. The ultrasonic dust removal device for circuit boards according to claim 1, characterized in that: The timing cam (51) includes a first rotating surface (81) and a second rotating surface (82), wherein the arc of the second rotating surface (82) is smaller than the arc of the first rotating surface (81).

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