PCBA (printed circuit board assembly) board cleaning tin bead magnetic suction turnover mechanism and magnetic suction turnover method

Abstract

The invention belongs to the technical field of PCBA plate cleaning, and particularly relates to a PCBA plate cleaning tin bead magnetic suction turnover mechanism and a magnetic suction turnover method.The PCBA plate cleaning tin bead magnetic suction turnover mechanism comprises a turnover rack, a camera is fixedly installed on the lower surface of a top plate of the turnover rack, and a turnover device, a cleaning device and a driving device are arranged on the outer surface of the turnover rack. According to the PCBA board cleaning tin bead magnetic suction turnover mechanism and the magnetic suction turnover method, the PCBA board can be cleaned by arranging the cleaning device, the tin beads attached to the outer surface of the PCBA board can be cleaned through rotation of a brush, a rotating roller can rotate through rotation of a rotating clamping jaw, and in order to clean the brush, the cleaning efficiency is improved. After a push rod makes contact with a cam part of a cam assembly, the push rod pushes a push plate to be pushed, a push ring on the push plate cleans tin bead impurities attached to the outer surface of a connecting sleeve, tin beads pushed out by the push ring and tin beads on a brush can be cleaned through dry ice sprayed by a dry ice spray head, and residual tin beads are reduced.

Description

Technical Field

[0001] This invention relates to the field of PCBA board cleaning technology, and in particular to a magnetic ball flipping mechanism and method for cleaning PCBA boards. Background Technology

[0002] During the reflow or wave soldering process of PCBA boards, tiny solder balls can easily form on the board surface, at the bottom of component leads, or in gaps due to solder paste printing, flux splatter, or improper process parameters. These solder balls can cause short circuits and reduce product reliability. Therefore, removing solder balls is a crucial step before final inspection.

[0003] In the industry, most PCBA solder ball cleaning processes use stripping fixtures, which easily leads to wasted effort, solder ball scattering, and high quality risks. Furthermore, when cleaning solder balls with brushes, solder balls, flux residue, and dust inevitably adhere to and become entangled on the brush bristles during the cleaning process. Over time, the brushes become dirty and brittle, drastically reducing cleaning efficiency. They may even scratch the PCBA board or components due to hard objects on the bristles, requiring the machine to be stopped and the brushes manually disassembled and cleaned by operators. This not only results in low production efficiency but also inconsistent cleaning results and high labor costs. Summary of the Invention

[0004] Based on the existing technical problems of PCBA cleaning solder ball easily causing wasted motion and solder ball scattering, high quality risks, low production efficiency, inconsistent cleaning effect and high labor costs, this invention proposes a PCBA board cleaning solder ball magnetic attraction and flipping mechanism and magnetic attraction and flipping method.

[0005] The present invention proposes a PCBA board cleaning solder ball magnetic flipping mechanism, which includes a flipping frame, a camera fixedly installed on the lower surface of the top plate of the flipping frame, and a flipping device, a cleaning device and a driving device provided on the outer surface of the flipping frame.

[0006] The flipping device is located on the outer surface of the flipping frame and flips the carrier containing the PCBA board. The flipping device includes a flipping frame, and the rotation of the flipping frame drives the PCBA board to be cleaned to flip.

[0007] The cleaning device is located on the outer surface of the flipping frame and cleans the PCBA board that needs to have solder balls cleaned. The cleaning device includes a lifting mechanism, a roller brush mechanism, and a cleaning mechanism. The lifting mechanism includes a lifting frame, and the lifting of the lifting frame drives the roller brush mechanism to lift. The roller brush mechanism includes a brush, and the rotation of the brush cleans the solder balls on the PCBA board. The cleaning mechanism includes a dry ice nozzle, and the dry ice nozzle cleans the residual solder balls on the surface of the brush.

[0008] The driving device is located on the outer surface of the flipping frame and drives the roller brush mechanism to move and rotate. The driving device includes a rotating gripper, and the rotation of the rotating gripper drives the brush to rotate.

[0009] Preferably, both ends of the flipping frame are rotatably connected to the outer surface of the flipping machine frame via bearings, and a handle is fixedly installed at one end of the flipping frame. The outer surface of the handle is slidably inserted into the inner wall of the arc-shaped groove of the flipping machine frame via rollers, and a movable roller is rotatably connected to the inner wall of the flipping frame.

[0010] Preferably, an electromagnet assembly is fixedly installed on the outer surface of the flipping frame, a blocking block is slidably inserted into the inner wall of the electromagnet assembly, a return spring is fixedly installed on the lower surface of the blocking block, one end of the return spring is fixedly installed to the inner wall of the flipping frame, and the outer surface of the electromagnet of the electromagnet assembly is magnetically connected to the outer surface of the blocking block.

[0011] Preferably, the lifting mechanism further includes a lifting hydraulic cylinder, which is fixedly installed on the outer surface of the tilting frame. A limit rod is fixedly installed on the outer surface of the tilting frame. A collection frame is slidably sleeved on the outer surface of the limit rod. A connecting spring is fixedly installed on the lower surface of the collection frame. One end of the connecting spring is fixedly installed on the outer surface of the tilting frame. The inner wall of the collection frame is slidably inserted into the outer surface of the lifting frame. A push frame is fixedly installed on the lower surface of the lifting frame. One end of the push frame passes through the lower surface of the collection frame and is fixedly installed on one end of the piston rod of the lifting hydraulic cylinder.

[0012] Preferably, the roller brush mechanism further includes a movable guide rail, which is fixedly installed on the upper surface of the lifting frame. A rotating roller is rotatably connected to the outer surface of the slider of the movable guide rail through a bearing seat. A connecting sleeve is fixedly installed on the outer surface of the rotating roller, and one end of the connecting sleeve is fixedly installed to one end of the brush.

[0013] Preferably, the cleaning mechanism further includes a push plate, a push ring fixedly installed on the outer surface of the push plate, the inner wall of the push ring slidably inserted into the outer surface of the connecting sleeve, a push rod with ball bearings fixedly installed on the inner surface of the push plate, one end of the push rod penetrating the inner wall of the rotating roller and extending into it, a support spring fixedly installed on the outer surface of the push rod, one end of the support spring fixedly installed on the inner wall of the rotating roller, a connecting ring rotatably connected to the inner wall of the rotating roller via a bearing, a cam assembly slidably inserted into the inner wall of the connecting ring, the outer surface of the cam assembly slidably connected to the outer surface of the ball bearings of the push rod, the inner wall of the collection frame fixedly installed on the outer surface of the dry ice nozzle, one end of the dry ice nozzle fixedly connected to the output end of the dry ice cleaning assembly via a hose, and a suction nozzle fixedly installed on the inner wall of the collection frame, one end of the suction nozzle fixedly connected to the air inlet of the fan via a hose.

[0014] Preferably, the driving device further includes a moving component, the outer surface of which is fixedly installed with the outer surface of the tilting frame. A driving frame is fixedly installed on the outer surface of the slider of the moving component. A driving housing is slidably inserted into the outer surface of the driving frame. A support ring with gears is rotatably connected to the outer surface of the driving housing. A rotary motor is fixedly installed on the upper surface of the driving housing. One end of the output shaft of the rotary motor meshes with the gear of the support ring through a gear. The outer surface of the support ring is hinged to one end of the rotating jaw through a pin. A moving rod with a rack is slidably inserted into the inner wall of the driving housing. A moving frame is rotatably connected to the outer surface of the moving rod. A driving connecting rod is hinged to the outer surface of the moving frame through a pin. One end of the driving connecting rod is hinged to the outer surface of the rotating jaw through a pin. One end of the rotating jaw is slidably inserted into the outer surface of the groove of the rotating roller.

[0015] Preferably, a support sleeve is slidably inserted into the inner wall of the drive housing via a slide rail. One end of the support sleeve passes through the inner wall of the moving rod and is hinged to a fixed gripper via a pin. A drive screw with gears is rotatably connected to the inner wall of the support sleeve via a bearing. A threaded bracket is threaded onto the outer surface of the drive screw. A clamping link is hinged to the outer surface of the threaded bracket via a pin. One end of the clamping link is hinged to one end of the fixed gripper via a pin. One end of the fixed gripper is slidably inserted into one end of the groove of the cam assembly.

[0016] Preferably, a dual-axis motor is fixedly installed on the inner wall of the drive housing. A long gear is fixedly installed at one end of the output shaft of the dual-axis motor. The gear of the drive screw meshes with the long gear. A transmission bevel gear assembly is fixedly installed at one end of the other output shaft of the dual-axis motor. A transmission gear is rotatably connected to the outer surface of the support of the transmission bevel gear assembly via a bearing. One end of the bevel gear of the transmission bevel gear assembly drives the transmission gear to rotate through the cooperation of a synchronous belt and a synchronous pulley. The transmission gear meshes with the rack of the moving rod. A moving hydraulic cylinder is fixedly installed on the outer surface of the drive frame. One end of the piston rod of the moving hydraulic cylinder is fixedly installed on the outer surface of the support sleeve located outside the drive housing. The outer surface of the support sleeve is slidably inserted into the outer surface of the drive housing via a connecting rod. A moving spring is fixedly installed on the outer surface of the connecting rod of the drive housing. One end of the moving spring is fixedly installed on the outer surface of the support sleeve.

[0017] The present invention proposes a magnetic flipping method for a PCBA board cleaning solder bead magnetic flipping mechanism, comprising the following steps:

[0018] S1: The carrier carrying the PCBA board is transported to the inner wall of the flipping frame by the conveyor belt. After the carrier is moved to the appropriate position by the moving rollers of the flipping frame, the switch of the electromagnet assembly is activated. The electromagnet assembly generates magnetic force and magnetically connects with the outer surface of the blocking block. After the blocking block is fixed, one end of the blocking block is inserted into the inner wall of the flipping frame to block the passage of the carrier in the flipping frame. After turning the handle, one end of the handle slides in the arc groove of the flipping frame and drives the carrier to flip so that the side of the PCBA board on the carrier that needs to be cleaned is facing down.

[0019] S2: After the lifting hydraulic cylinder is started, it drives the push frame to rise. The push frame drives the lifting frame to rise inside the collection frame. After the lifting frame is limited by the inner wall of the collection frame, it drives the collection frame to rise. The connecting spring is stretched, and the brush contacts the lower surface of the PCBA board. At the same time, one end of the rotating roller and one end of the cam assembly are located on one side of the rotating jaw and the fixed jaw.

[0020] S3: The moving hydraulic cylinder on the drive frame starts, pushing the support sleeve and drive housing to move synchronously. The drive housing drives the rotating jaw and fixed jaw to one end of the roller and cam assembly. The dual-axis motor inside the drive housing starts, driving the long gear to rotate. The long gear drives the gear of the drive screw to rotate. The drive screw drives the threaded frame connected to it to move. The threaded frame drives the clamping link to deflect, so that the fixed jaw clamps one end of the cam assembly. At the same time, the output shaft of the other end of the dual-axis motor drives the transmission bevel gear assembly to rotate. After transmission through the synchronous belt and synchronous pulley, it drives the transmission gear to rotate. The transmission gear drives the moving rod to move. The moving rod pulls the moving frame to move. After the drive link deflects, it drives the rotating jaw to deflect and clamp the roller. The rotating motor on the drive housing starts, driving the support ring to rotate through the gear transmission. The support ring drives the roller to rotate through the rotating jaw. At the same time, the moving assembly starts, driving the drive frame to move. The roller moves on the outer surface of the moving guide rail, cleaning the solder balls on the outer surface of the PCBA board.

[0021] S4: After cleaning, the rollers and lifting frame are reset, the electromagnet assembly is de-energized, the handle is rotated, the tilting frame is reset, the manual press of the blocking block is lowered, the reset spring is compressed, so that the channel inside the tilting frame is unobstructed, the manual push of the carrier is moved, so that the cleaned PCBA board can proceed to the next process.

[0022] S5: When cleaning is required, the hydraulic cylinder of the moving component drives the drive frame to descend synchronously with the lifting frame, maintaining the gripping of the rotating and fixed grippers on the roller and cam assembly. The moving hydraulic cylinder continues to push, and after the drive housing is limited by the guide rail on the drive frame, the moving hydraulic cylinder continues to push, pushing the support sleeve to move. After the support sleeve pushes the fixed gripper to move, it pushes the cam assembly in the insertion ring to move, so that the cam part of the cam assembly is located on the outer surface of the push rod. The rotating gripper drives the roller to rotate, so that the push rod of the push plate below is located at the most convex part of the cam. After the push rod pushes the push plate to move downward, the push ring pushes the solder beads or impurities adhering to the outer surface of the connecting sleeve. At the same time, after the suction nozzle and dry ice nozzle are activated, the dry ice nozzle cleans the solder beads, and the suction nozzle sucks up the generated gas, reducing the residue of solder beads and impurities on the brush, thus completing the cleaning of the brush.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. By setting up a flipping device, the carrier containing the PCBA board can be flipped for easy cleaning, while preventing the solder balls from entering other positions. The flipping frame is driven by rotating the handle, which can also flip the PCBA board. The moving rollers make it easy to push the PCBA directly in. The operation is simple and convenient. When the electromagnet component is powered on, it can block the blocking block to prevent the carrier from falling after flipping, reduce wasted action, eliminate quality risks, and solve the technical problems of existing PCBA cleaning solder ball cleaning that easily causes wasted action and solder ball scattering, resulting in high quality risks.

[0025] 2. By setting up a cleaning device, PCBA boards can be cleaned. The rotation of the brush can clean the solder beads attached to the outer surface of the PCBA board. The rotating roller can be rotated by the rotation of the rotating jaws. In order to clean the brush, after the push rod contacts the cam part of the cam assembly, the push rod pushes the push plate. The push ring on the push plate cleans the solder beads and impurities attached to the outer surface of the connecting sleeve. The dry ice sprayed by the dry ice nozzle can clean the solder beads pushed out by the push ring and the solder beads on the brush, reducing the residue of solder beads. This solves the technical problems of low production efficiency, inconsistent cleaning effect and high labor cost of existing PCBA cleaning. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a magnetic flipping mechanism for cleaning solder beads on a PCBA board, as proposed in this invention.

[0027] Figure 2 This is a perspective view of the flipping frame structure of a magnetic flipping mechanism for cleaning solder beads on a PCBA board, as proposed in this invention.

[0028] Figure 3 This is a perspective view of the electromagnet assembly structure of a PCBA board cleaning solder ball magnetic attraction and flipping mechanism proposed in this invention.

[0029] Figure 4 This is a perspective view of the collection frame structure of a magnetic flipping mechanism for cleaning solder beads on a PCBA board, as proposed in this invention.

[0030] Figure 5 This is a perspective view of the lifting frame structure of a magnetic flipping mechanism for cleaning solder beads on a PCBA board, as proposed in this invention.

[0031] Figure 6 This is a perspective view of the dry ice nozzle structure of a magnetic flipping mechanism for cleaning solder beads on a PCBA board, as proposed in this invention.

[0032] Figure 7 This is a perspective view of the brush structure of a magnetic flipping mechanism for cleaning solder beads on a PCBA board, as proposed in this invention.

[0033] Figure 8 This is a perspective view of the cam assembly structure of a magnetic flipping mechanism for cleaning solder beads on a PCBA board, as proposed in this invention.

[0034] Figure 9 This is a perspective view of the drive frame structure of a magnetic flipping mechanism for cleaning solder beads on a PCBA board, as proposed in this invention.

[0035] Figure 10 This is a perspective view of the rotating gripper structure of a magnetic flipping mechanism for cleaning solder beads on a PCBA board, as proposed in this invention.

[0036] Figure 11 This is a perspective view of the fixed gripper structure of a magnetic flipping mechanism for cleaning solder beads on a PCBA board, as proposed in this invention.

[0037] Figure 12 This is a perspective view of the long gear structure of a magnetic flipping mechanism for cleaning solder beads on a PCBA board, as proposed in this invention.

[0038] In the diagram: 1. Tilting frame; 11. Camera; 2. Tilting frame; 21. Handle; 22. Moving roller; 23. Electromagnet assembly; 24. Blocking block; 25. Return spring; 3. Lifting hydraulic cylinder; 31. Limit rod; 32. Collection frame; 33. Connecting spring; 34. Lifting frame; 35. Push frame; 4. Moving guide rail; 41. Rotary roller; 42. Connecting sleeve; 43. Brush; 5. Push plate; 51. Push ring; 52. Push rod; 53. Support spring; 54. Insertion ring; 55. Cam assembly; 56. Dry ice nozzle; 57. Suction nozzle; 6. Moving assembly; 61. Drive frame; 62. Drive housing; 63. Support ring; 64. Rotary motor; 65. Rotating gripper; 66. Moving rod; 67. Moving frame; 68. Drive linkage; 7. Support sleeve; 71. Fixed gripper; 72. Drive screw; 73. Threaded frame; 74. Clamping linkage; 8. Dual-axis motor; 81. Long gear; 82. Transmission bevel gear assembly; 83. Transmission gear; 84. Moving hydraulic cylinder; 85. Moving spring. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] Reference Figures 1-12A PCBA board cleaning solder ball magnetic flipping mechanism includes a flipping frame 1. A camera 11 is fixedly installed on the lower surface of the top plate of the flipping frame 1. The camera 11 can capture the solder balls on the outer surface of the cleaned PCBA board and determine whether the cleaning is qualified. It can also be judged manually by using a magnifying glass. The outer surface of the flipping frame 1 is provided with a flipping device, a cleaning device and a driving device.

[0041] like Figures 2-3 As shown, in order to rotate the PCBA board, the rotating device is located on the outer surface of the rotating frame 1 and rotates the carrier containing the PCBA board. The rotating device includes a rotating frame 2, and the rotation of the rotating frame 2 drives the PCBA board to be cleaned to rotate.

[0042] Specifically, to facilitate the flipping of the flipping frame 2, both ends of the flipping frame 2 are rotatably connected to the outer surface of the flipping frame 1 through bearings. To drive the flipping frame 2 to flip, a handle 21 is fixedly installed at one end of the flipping frame 2. Alternatively, the handle 21 can be replaced with a motor to drive the flipping frame 2 to flip. The appropriate drive method can be changed according to the usage requirements. The outer surface of the handle 21 is slidably inserted into the inner wall of the arc-shaped groove of the flipping frame 1 through rollers, thereby limiting the position of the handle 21. To facilitate the movement of the carrier transported in the previous process on the inner wall of the flipping frame 2, a movable roller 22 is rotatably connected to the inner wall of the flipping frame 2. Multiple movable rollers 22 are distributed at equal intervals on the lower surface of the groove of the flipping frame 2.

[0043] Specifically, to prevent the carrier with the PCBA board from falling during rotation, an electromagnet assembly 23 is fixedly installed on the outer surface of the rotating frame 2. The electromagnet assembly 23 includes a housing, an electromagnet installed inside the housing, and a control switch. A blocking block 24 is slidably inserted into the inner wall of the electromagnet assembly 23. To facilitate the return of the blocking block 24 after descent, a return spring 25 is fixedly installed on the lower surface of the blocking block 24. One end of the return spring 25 is fixedly installed to the inner wall of the rotating frame 2. To facilitate the fixation of the position of the blocking block 24, the outer surface of the electromagnet of the electromagnet assembly 23 is magnetically connected to the outer surface of the blocking block 24. During rotation, after the electromagnet is energized, it can attract the blocking block 24 and fix the position of the blocking block 24. Thus, the blocking block 24 can block the groove channel of the rotating frame 2, preventing the carrier from falling through the groove during rotation. When the carrier moves, when the blocking block 24 is pressed down to descend, the lower end of the blocking block 24 inserts into the lower end of the groove of the rotating frame 2, allowing the carrier to enter the next process through the rotating frame 2.

[0044] like Figures 4-8As shown, in order to quickly clean PCBA boards, the cleaning device is located on the outer surface of the flip frame 1 and cleans the PCBA boards that need to be cleaned of solder balls. The cleaning device includes a lifting mechanism, a roller brush mechanism, and a cleaning mechanism. The lifting mechanism includes a lifting frame 34. The lifting of the lifting frame 34 drives the roller brush mechanism to lift. The roller brush mechanism includes a brush 43. The rotation of the brush 43 cleans the solder balls on the PCBA board. The cleaning mechanism includes a dry ice nozzle 56. The dry ice nozzle 56 cleans the residual solder balls on the surface of the brush 43.

[0045] Specifically, to facilitate the flipping of the tilting frame 2, the lifting mechanism also includes a lifting hydraulic cylinder 3. The lifting hydraulic cylinder 3 is fixedly installed on the outer surface of the tilting frame 1. A limit rod 31 is fixedly installed on the outer surface of the tilting frame 1. In order to collect the solder balls splashed during cleaning, a collection frame 32 is slidably sleeved on the outer surface of the limit rod 31. A connecting spring 33 is fixedly installed on the lower surface of the collection frame 32. One end of the connecting spring 33 is fixedly installed on the outer surface of the tilting frame 1. The inner wall of the collection frame 32 is slidably inserted into the outer surface of the lifting frame 34, so that the rise of the lifting frame 34 can drive the collection frame 32 to rise, keeping the collection frame 32 below the brush 43. A sliding drawer can be installed inside the collection frame 32 to facilitate the removal of the solder balls collected in the inner collection frame 32 for cleaning, thus eliminating the need to disassemble the collection frame 32. A pusher 35 is fixedly installed on the lower surface of the lifting frame 34. One end of the pusher 35 passes through the lower surface of the collection frame 32 and is fixedly installed on one end of the piston rod of the lifting hydraulic cylinder 3.

[0046] Specifically, in order to move and rotate the brush 43, the roller brush mechanism also includes a moving guide rail 4. The moving guide rail 4 is fixedly installed on the upper surface of the lifting frame 34. The outer surface of the slider of the moving guide rail 4 is rotatably connected to the rotating roller 41 through the bearing seat. In order to facilitate the cleaning of the brush 43, a connecting sleeve 42 is fixedly installed on the outer surface of the rotating roller 41. One end of the connecting sleeve 42 is fixedly installed with one end of the brush 43. The length of the brush 43 is shortened by the connecting sleeve 42 without affecting the use of the brush 43. Both the connecting sleeve 42 and the brush 43 are made of anti-static carbon fiber material.

[0047] Specifically, to clean the connecting sleeve 42 and the brush 43, the cleaning mechanism also includes a push plate 5. A push ring 51 is fixedly installed on the outer surface of the push plate 5. The inner wall of the push ring 51 is slidably inserted into the outer surface of the connecting sleeve 42, which facilitates the ejection of impurities and solder balls adhering to the outer surface of the connecting sleeve 42. To facilitate the movement of the push plate 5, a push rod 52 with ball bearings is fixedly installed on the inner surface of the push plate 5. One end of the push rod 52 passes through the inner wall of the rotating roller 41 and extends into it. To prevent the push rod 52 from moving when it does not need to move, a support spring 53 is fixedly installed on the outer surface of the push rod 52. One end of the support spring 53 is fixedly installed in the inner wall of the rotating roller 41. The inner wall of the rotating roller 41 is rotated by bearings. A plug-in ring 54 is dynamically connected, and a cam assembly 55 is slidably plugged into the inner wall of the plug-in ring 54. The cam assembly 55 is composed of multiple cams and rods. The outer surface of the cam assembly 55 is slidably connected to the outer surface of the ball of the push rod 52. In order to quickly clean the solder beads on the outer surface of the brush 43 and the connecting sleeve 42, the inner wall of the collection frame 32 is fixedly installed on the outer surface of the dry ice nozzle 56. One end of the dry ice nozzle 56 is fixedly connected to the output end of the dry ice cleaning assembly through a hose. The dry ice cleaning assembly consists of a dry ice cleaning machine and a dry ice insulation storage box. A suction nozzle 57 is fixedly installed on the inner wall of the collection frame 32. One end of the suction nozzle 57 is fixedly connected to the air inlet of the fan through a hose to collect solder bead debris and prevent secondary pollution.

[0048] like Figures 9-12 As shown, in order to facilitate the control and disassembly of the roller brush mechanism, the drive device is located on the outer surface of the flip frame 1 and drives the roller brush mechanism to move and rotate. The drive device includes a rotating gripper 65, and the rotation of the rotating gripper 65 drives the brush 43 to rotate.

[0049] Specifically, in order to drive the rotating gripper 65 to rotate, the drive device also includes a moving component 6. The outer surface of the moving component 6 is fixedly installed on the outer surface of the tilting frame 1. The moving component 6 includes a hydraulic cylinder, a frame mounted on one end of the piston rod of the hydraulic cylinder, a motor mounted on the frame, a lead screw rotatably connected to the frame and fixedly installed at one end of the motor output shaft, and a slider slidably inserted into the frame and threadedly connected to the lead screw. A drive frame 61 is fixedly installed on the outer surface of the slider of the moving component 6. A drive housing 62 is slidably inserted into the outer surface of the drive frame 61. A support ring 63 with gears is rotatably connected to the outer surface of the drive housing 62. A rotary motor 64 is fixedly installed on the upper surface of the drive housing 62. One end of the output shaft meshes with the gear of the support ring 63 via a gear, which can drive the support ring 63 to rotate. The outer surface of the support ring 63 is hinged to one end of the rotating jaw 65 via a pin. A moving rod 66 with a rack is slidably inserted into the inner wall of the drive housing 62. The movement of the moving rod 66 drives the rotating jaw 65 to deflect. A moving frame is rotatably connected to the outer surface of the moving rod 66. A drive connecting rod 68 is hinged to the outer surface of the moving frame via a pin. One end of the drive connecting rod 68 is hinged to the outer surface of the rotating jaw 65 via a pin. One end of the rotating jaw 65 is slidably inserted into the outer surface of the groove of the rotating roller 41. The clamping of the rotating jaw 65 with the rotating roller 41 can drive the rotating roller 41 to rotate and move.

[0050] Specifically, in order to clamp the cam assembly 55 and prevent it from rotating, a support sleeve 7 is slidably inserted into the inner wall of the drive housing 62 via a slide rail. One end of the support sleeve 7 passes through the inner wall of the moving rod 66 and is hinged to a fixed jaw 71 via a pin. The inner wall of the support sleeve 7 is rotatably connected to a drive screw 72 with gears via a bearing. A threaded bracket 73 is threadedly connected to the outer surface of the drive screw 72. A clamping link 74 is hinged to the outer surface of the threaded bracket 73 via a pin. One end of the clamping link 74 is hinged to one end of the fixed jaw 71 via a pin. One end of the fixed jaw 71 is slidably inserted into one end of the groove of the cam assembly 55.

[0051] Specifically, to drive the rotating gripper 65 and the fixed gripper 71, a dual-axis motor 8 is fixedly installed on the inner wall of the drive housing 62. The dual-axis motor 8 can be replaced with a motor with a gearbox, converting the single output of the motor into bidirectional transmission. A long gear 81 is fixedly installed at one end of the output shaft of the dual-axis motor 8. The gear of the drive screw 72 meshes with the long gear 81. The long gear 81 has a certain length so that after the drive screw 72 moves, the gear of the drive screw 72 can still mesh with the long gear 81. A transmission bevel gear assembly 82 is fixedly installed at one end of the other output shaft of the dual-axis motor 8. The transmission gear assembly 82 consists of a bracket and bevel gears rotatably connected to the bracket and meshing. One of the bevel gears is fixedly installed at one end of the output shaft of the dual-axis motor 8. The outer surface of the bracket of component 82 is rotatably connected to a transmission gear 83 via a bearing. One end of the bevel gear of the transmission bevel gear assembly 82 drives the transmission gear 83 to rotate through the cooperation of a synchronous belt and a synchronous pulley. The transmission gear 83 meshes with the rack of the moving rod 66. The rotation of the transmission gear 83 can drive the moving rod 66 to move. A moving hydraulic cylinder 84 is fixedly installed on the outer surface of the drive frame 61. One end of the piston rod of the moving hydraulic cylinder 84 is fixedly installed on the outer surface of the bracket of the support sleeve 7 located outside the drive housing 62. The outer surface of the support sleeve 7 is slidably inserted into the outer surface of the drive housing 62 through a connecting rod. A moving spring 85 is fixedly installed on the outer surface of the connecting rod of the drive housing 62. One end of the moving spring 85 is fixedly installed on the outer surface of the support sleeve 7.

[0052] The present invention proposes a magnetic flipping method for a PCBA board cleaning solder bead magnetic flipping mechanism, comprising the following steps:

[0053] S1: The carrier carrying the PCBA board is transported to the inner wall of the flipping frame 2 by the conveyor belt. After the carrier is moved to a suitable position by the moving rollers 22 of the flipping frame 2, the switch of the electromagnet assembly 23 is activated. The electromagnet assembly 23 generates magnetic force and magnetically connects with the outer surface of the blocking block 24. After the blocking block 24 is fixed, one end of the blocking block 24 is inserted into the inner wall of the flipping frame 2 to block the passage of the carrier in the flipping frame 2. After the handle 21 is turned, one end of the handle 21 slides in the arc groove of the flipping frame 1 and drives the carrier to flip so that the side of the PCBA board on the carrier that needs to be cleaned is facing down.

[0054] S2: After the lifting hydraulic cylinder 3 is started, it drives the push frame 35 to rise. The push frame 35 drives the lifting frame 34 to rise inside the collection frame 32. After the lifting frame 34 is limited by the inner wall of the collection frame 32, it drives the collection frame 32 to rise. The connecting spring 33 is stretched, and the brush 43 contacts the lower surface of the PCBA board. At the same time, one end of the rotating roller 41 and one end of the cam assembly 55 are located on one side of the rotating gripper 65 and the fixed gripper 71.

[0055] S3: The movable hydraulic cylinder 84 on the drive frame 61 is activated, pushing the support sleeve 7 and the drive housing 62 to move synchronously. The drive housing 62 drives the rotating gripper 65 and the fixed gripper 71 to be located at one end of the rotating roller 41 and the cam assembly 55. The dual-axis motor 8 inside the drive housing 62 is activated, driving the long gear 81 to rotate. The long gear 81 drives the gear of the drive screw 72 to rotate. The drive screw 72 drives the threaded frame 73 connected to it to move. The threaded frame 73 drives the clamping link 74 to deflect, so that the fixed gripper 71 clamps one end of the cam assembly 55. At the same time, the output shaft of the other end of the dual-axis motor 8 drives the transmission bevel gear set. The component 82 rotates, and through the transmission of the synchronous belt and synchronous pulley, it drives the transmission gear 83 to rotate. The transmission gear 83 drives the moving rod 66 to move, and the moving rod 66 pulls the moving frame to move. The driving link 68 deflects, and then drives the rotating jaw 65 to deflect, clamping the rotating roller 41. The rotating motor 64 on the drive housing 62 starts, and through the transmission of the gears, it drives the support ring 63 to rotate. The support ring 63 drives the rotating roller 41 to rotate through the rotating jaw 65. At the same time, the moving component 6 starts, driving the drive frame 61 to move, and driving the rotating roller 41 to move on the outer surface of the moving guide rail 4 to clean the solder balls on the outer surface of the PCBA board.

[0056] S4: After cleaning is completed, the rotating roller 41 and lifting frame 34 are reset, the electromagnet assembly 23 is de-energized, the handle 21 is rotated, the flipping frame 2 is reset, the manual press of the blocking block 24 is lowered, the reset spring 25 is compressed, so that the channel in the flipping frame 2 is unobstructed, the manual push of the carrier is moved, so that the cleaned PCBA board can proceed to the next process.

[0057] S5: When cleaning is required, the hydraulic cylinder of the moving component 6 drives the drive frame 61 to cooperate with the lifting frame 34 to descend synchronously, maintaining the gripping of the rotating jaw 65 and the fixed jaw 71 on the rotating roller 41 and the cam assembly 55. The moving hydraulic cylinder 84 continues to push, and after the drive housing 62 is limited by the guide rail on the drive frame 61, the moving hydraulic cylinder 84 continues to push, pushing the support sleeve 7 to move. After the support sleeve 7 pushes the fixed jaw 71 to move, it pushes the cam assembly 55 in the insertion ring 54 to move, so that the cam assembly 55... The cam part is located on the outer surface of the push rod 52. The rotating jaw 65 drives the roller 41 to rotate, so that the push rod 52 of the push plate 5 located below is located behind the most convex part of the cam. After the push rod 52 pushes the push plate 5 to move downward, the push ring 51 pushes the solder beads or impurities stuck to the outer surface of the connecting sleeve 42. At the same time, after the suction nozzle 57 and the dry ice nozzle 56 are started, the dry ice nozzle 56 cleans the solder beads, and the suction nozzle 57 sucks up the generated gas, reducing the residue of solder beads and impurities on the brush 43, thus completing the cleaning of the brush 43.

[0058] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A PCBA board cleaning solder ball magnetic flipping mechanism, comprising a flipping frame (1), characterized in that: A camera (11) is fixedly installed on the lower surface of the top plate of the flipping frame (1), and a flipping device, a cleaning device and a driving device are provided on the outer surface of the flipping frame (1). The flipping device is located on the outer surface of the flipping frame (1) and flips the carrier containing the PCBA board. The flipping device includes a flipping frame (2), and the rotation of the flipping frame (2) drives the PCBA board to be cleaned to flip. The cleaning device is located on the outer surface of the flip frame (1) and cleans the PCBA board that needs to be cleaned of solder balls. The cleaning device includes a lifting mechanism, a roller brush mechanism and a cleaning mechanism. The lifting mechanism includes a lifting frame (34). The lifting of the lifting frame (34) drives the roller brush mechanism to lift. The roller brush mechanism includes a brush (43). The rotation of the brush (43) cleans the solder balls on the PCBA board. The cleaning mechanism includes a dry ice nozzle (56). The dry ice nozzle (56) cleans the residual solder balls on the surface of the brush (43). The driving device is located on the outer surface of the flipping frame (1) and drives the roller brush mechanism to move and rotate. The driving device includes a rotating gripper (65), and the rotation of the rotating gripper (65) drives the brush (43) to rotate.

2. The PCBA board cleaning solder bead magnetic flipping mechanism according to claim 1, characterized in that: The two ends of the flipping frame (2) are rotatably connected to the outer surface of the flipping frame (1) through bearings. A handle (21) is fixedly installed at one end of the flipping frame (2). The outer surface of the handle (21) is slidably inserted into the inner wall of the arc groove of the flipping frame (1) through rollers. A movable roller (22) is rotatably connected to the inner wall of the flipping frame (2).

3. The PCBA board cleaning solder bead magnetic flipping mechanism according to claim 2, characterized in that: An electromagnet assembly (23) is fixedly installed on the outer surface of the flipping frame (2). A blocking block (24) is slidably inserted into the inner wall of the electromagnet assembly (23). A return spring (25) is fixedly installed on the lower surface of the blocking block (24). One end of the return spring (25) is fixedly installed to the inner wall of the flipping frame (2). The outer surface of the electromagnet of the electromagnet assembly (23) is magnetically connected to the outer surface of the blocking block (24).

4. The PCBA board cleaning solder bead magnetic flipping mechanism according to claim 3, characterized in that: The lifting mechanism also includes a lifting hydraulic cylinder (3), which is fixedly installed on the outer surface of the tilting frame (1). A limit rod (31) is fixedly installed on the outer surface of the tilting frame (1). A collection frame (32) is slidably sleeved on the outer surface of the limit rod (31). A connecting spring (33) is fixedly installed on the lower surface of the collection frame (32). One end of the connecting spring (33) is fixedly installed on the outer surface of the tilting frame (1). The inner wall of the collection frame (32) is slidably inserted into the outer surface of the lifting frame (34). A pusher (35) is fixedly installed on the lower surface of the lifting frame (34). One end of the pusher (35) passes through the lower surface of the collection frame (32) and is fixedly installed on one end of the piston rod of the lifting hydraulic cylinder (3).

5. The PCBA board cleaning solder bead magnetic flipping mechanism according to claim 4, characterized in that: The roller brush mechanism also includes a movable guide rail (4), which is fixedly installed on the upper surface of the lifting frame (34). The outer surface of the slider of the movable guide rail (4) is rotatably connected to a rotating roller (41) through a bearing seat. A connecting sleeve (42) is fixedly installed on the outer surface of the rotating roller (41). One end of the connecting sleeve (42) is fixedly installed with one end of the brush (43).

6. The PCBA board cleaning solder bead magnetic flipping mechanism according to claim 5, characterized in that: The cleaning mechanism also includes a push plate (5), on the outer surface of which a push ring (51) is fixedly installed. The inner wall of the push ring (51) is slidably inserted into the outer surface of the connecting sleeve (42). A push rod (52) with ball bearings is fixedly installed on the inner surface of the push plate (5). One end of the push rod (52) passes through the inner wall of the rotating roller (41) and extends into it. A support spring (53) is fixedly installed on the outer surface of the push rod (52). One end of the support spring (53) is fixedly installed to the inner wall of the rotating roller (41). The inner wall of the rotating roller (41) A rotatable connector (54) is connected to the bearing. A cam assembly (55) is slidably inserted into the inner wall of the cam assembly (55). The outer surface of the cam assembly (55) is slidably connected to the outer surface of the ball bearing of the push rod (52). The inner wall of the collection frame (32) is fixedly installed with the outer surface of the dry ice nozzle (56). One end of the dry ice nozzle (56) is fixedly connected to the output end of the dry ice cleaning assembly through a hose. A suction nozzle (57) is fixedly installed on the inner wall of the collection frame (32). One end of the suction nozzle (57) is fixedly connected to the air inlet of the fan through a hose.

7. The PCBA board cleaning solder bead magnetic flipping mechanism according to claim 6, characterized in that: The driving device further includes a moving component (6), the outer surface of which is fixedly installed with the outer surface of the tilting frame (1). A driving frame (61) is fixedly installed on the outer surface of the slider of the moving component (6). A driving housing (62) is slidably inserted into the outer surface of the driving frame (61). A support ring (63) with gears is rotatably connected to the outer surface of the driving housing (62). A rotary motor (64) is fixedly installed on the upper surface of the driving housing (62). One end of the output shaft of the rotary motor (64) is connected to the support ring (63) through a gear. The gears of the ring (63) mesh, the outer surface of the supporting rotating ring (63) is hinged to one end of the rotating jaw (65) by a pin, the inner wall of the drive housing (62) is slidably inserted with a moving rod (66) with a rack, the outer surface of the moving rod (66) is rotatably connected with a moving frame, the outer surface of the moving frame is hinged with a driving link (68) by a pin, one end of the driving link (68) is hinged to the outer surface of the rotating jaw (65) by a pin, and one end of the rotating jaw (65) is slidably inserted into the outer surface of the groove of the rotating roller (41).

8. The PCBA board cleaning solder bead magnetic flipping mechanism according to claim 7, characterized in that: The inner wall of the drive housing (62) is slidably connected to a support sleeve (7) via a slide rail. One end of the support sleeve (7) passes through the inner wall of the moving rod (66) and is hinged to a fixed jaw (71) via a pin. The inner wall of the support sleeve (7) is rotatably connected to a drive screw (72) with gears via a bearing. The outer surface of the drive screw (72) is threadedly connected to a threaded bracket (73). The outer surface of the threaded bracket (73) is hinged to a clamping link (74) via a pin. One end of the clamping link (74) is hinged to one end of the fixed jaw (71) via a pin. One end of the fixed jaw (71) is slidably connected to one end of the groove of the cam assembly (55).

9. A PCBA board cleaning solder bead magnetic flipping mechanism according to claim 8, characterized in that: A dual-axis motor (8) is fixedly installed on the inner wall of the drive housing (62). A long gear (81) is fixedly installed on one end of the output shaft of the dual-axis motor (8). The gear of the drive screw (72) meshes with the long gear (81). A transmission bevel gear assembly (82) is fixedly installed on one end of the other output shaft of the dual-axis motor (8). A transmission gear (83) is rotatably connected to the outer surface of the support of the transmission bevel gear assembly (82) through a bearing. One end of the bevel gear of the transmission bevel gear assembly (82) drives the transmission gear (83) to rotate through the cooperation of a synchronous belt and a synchronous pulley. The gear (83) meshes with the rack of the moving rod (66). A moving hydraulic cylinder (84) is fixedly installed on the outer surface of the drive frame (61). One end of the piston rod of the moving hydraulic cylinder (84) is fixedly installed on the outer surface of the support sleeve (7) located outside the drive housing (62). The outer surface of the support sleeve (7) is slidably inserted into the outer surface of the drive housing (62) through a connecting rod. A moving spring (85) is fixedly installed on the outer surface of the connecting rod of the drive housing (62). One end of the moving spring (85) is fixedly installed on the outer surface of the support sleeve (7).

10. A magnetic flipping method for a PCBA board cleaning solder bead magnetic flipping mechanism, using the PCBA board cleaning solder bead magnetic flipping mechanism as described in claim 9, characterized in that: S1: The carrier with PCBA board is transported to the inner wall of the flipping frame (2) by the conveyor belt. After the carrier is moved to the appropriate position by the moving roller (22) of the flipping frame (2), the switch of the electromagnet assembly (23) is activated. The electromagnet assembly (23) generates magnetic force and magnetically connects with the outer surface of the blocking block (24). After the blocking block (24) is fixed, one end of the blocking block (24) is inserted into the inner wall of the flipping frame (2) to block the passage of the carrier in the flipping frame (2). After the handle (21) is turned, one end of the handle (21) slides in the arc groove of the flipping frame (1) and drives the carrier to flip so that the side of the PCBA board on the carrier that needs to be cleaned is facing down. S2: After the lifting hydraulic cylinder (3) is started, it drives the push frame (35) to rise. The push frame (35) drives the lifting frame (34) to rise inside the collection frame (32). After the lifting frame (34) is limited by the inner wall of the collection frame (32), it drives the collection frame (32) to rise. The connecting spring (33) is stretched, and the brush (43) contacts the lower surface of the PCBA board. At the same time, one end of the rotating roller (41) and one end of the cam assembly (55) are located on one side of the rotating jaw (65) and the fixed jaw (71). S3: The moving hydraulic cylinder (84) on the drive frame (61) is activated, pushing the support sleeve (7) and the drive housing (62) to move synchronously. The drive housing (62) drives the rotating jaw (65) and the fixed jaw (71) to be located at one end of the rotating roller (41) and the cam assembly (55). The dual-axis motor (8) inside the drive housing (62) is activated, and the dual-axis motor (8) drives the long gear (81) to rotate. The long gear (81) drives the gear of the drive screw (72) to rotate. The drive screw (72) drives the threaded frame (73) connected to it to move. After the threaded frame (73) drives the clamping link (74) to deflect, the fixed jaw (71) clamps one end of the cam assembly (55). At the same time, the output shaft of the other end of the dual-axis motor (8) drives the transmission The bevel gear assembly (82) rotates, and after being transmitted through the synchronous belt and synchronous pulley, it drives the transmission gear (83) to rotate. The transmission gear (83) drives the moving rod (66) to move. The moving rod (66) pulls the moving frame to move. After the driving link (68) deflects, it drives the rotating jaw (65) to deflect and clamp the rotating roller (41). The rotary motor (64) on the drive housing (62) starts. Through the transmission of the gear, it drives the support ring (63) to rotate. The support ring (63) drives the rotating roller (41) to rotate through the rotating jaw (65). At the same time, the moving assembly (6) starts, drives the drive frame (61) to move, and drives the rotating roller (41) to move on the outer surface of the moving guide rail (4) to clean the solder balls on the outer surface of the PCBA board. S4: After cleaning, the roller (41) and lifting frame (34) are reset, the electromagnet assembly (23) is de-energized, the handle (21) is rotated, the flipping frame (2) is reset, the manual press of the blocking block (24) is lowered, the reset spring (25) is compressed, so that the channel in the flipping frame (2) is unobstructed, the manual push of the carrier is moved, so that the cleaned PCBA board can proceed to the next procedure; S5: When cleaning is required, the hydraulic cylinder of the moving component (6) drives the drive frame (61) to cooperate with the lifting frame (34) to descend synchronously, maintaining the gripping of the rotating jaw (65) and the fixed jaw (71) on the rotating roller (41) and the cam assembly (55). The moving hydraulic cylinder (84) continues to push. After the drive housing (62) is limited by the guide rail on the drive frame (61), the moving hydraulic cylinder (84) continues to push, pushing the support sleeve (7) to move. After the support sleeve (7) pushes the fixed jaw (71) to move, it pushes the cam assembly (55) in the insertion ring (54) to move, so that the cam assembly (55) moves. The cam part of the push rod (52) is located on the outer surface of the push rod (52). The rotating jaw (65) drives the roller (41) to rotate, so that the push rod (52) of the push plate (5) below is located at the most convex part of the cam. After the push rod (52) pushes the push plate (5) to move downward, the push ring (51) pushes the solder beads or impurities stuck on the outer surface of the connecting sleeve (42). At the same time, after the suction nozzle (57) and the dry ice nozzle (56) are started, the dry ice nozzle (56) cleans the solder beads, and the suction nozzle (57) sucks the generated gas to reduce the residue of solder beads and impurities on the brush (43) and complete the cleaning of the brush (43).

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