Circuit board hole plugging equipment and method

Abstract

The invention relates to the technical field of circuit board processing, in particular to circuit board hole plugging equipment and method.The circuit board hole plugging equipment comprises a rack, a rotating plate is rotationally installed on the upper portion in the rack, an upper processing mechanism is arranged on the upper portion in the rotating plate, a plurality of first ejector rods are evenly and fixedly installed on the inner top wall of the rotating plate, and the lower ends of the first ejector rods penetrate through the upper processing mechanism; and a lower treatment mechanism is arranged on the lower portion in the rotating plate, a plurality of second ejector rods are evenly and fixedly installed on the inner bottom wall of the rotating plate, and the upper ends of the second ejector rods penetrate through the lower treatment mechanism. The position of the circuit board is finely adjusted under the action of the knurl wheel to ensure accurate positioning and improve the roughness of the plug hole wall, bubbles are completely eradicated in a vacuum environment, the binding force is ensured, the plug hole quality is improved, the percent of pass of the circuit board is ensured, the workload of workers is greatly reduced through cutting and automatic polishing of the cutting knife, the production efficiency is improved, and the cost is saved. Dust is sucked away to prevent the circuit board from being scratched, and field workers are protected from being hurt by the dust.

Description

Technical Field

[0001] The present invention relates to the technical field of printed circuit board processing, and particularly relates to a printed circuit board plugging hole device and method. Background Art

[0002] A printed circuit board, whose full name is Printed Circuit Board (abbreviated as PCB), is also often called a printed wiring board in the composition structure of electronic devices. It is a very crucial and important component in the electronic field and occupies an indispensable position in the entire electronic system. The printed circuit board is like a solid "cornerstone" for electronic components, providing a stable and reliable support for various electronic components such as resistors, capacitors, and chips, ensuring that they are in their proper positions in the device. At the same time, the printed circuit board is the core "bridge" for electrical connection between electronic components. With its exquisitely designed conductive circuits, it realizes the current conduction and signal transmission between electronic components, enabling each electronic component to work together, and thus ensuring the stable operation and function realization of the entire electronic device.

[0003] In the current production and processing technology system of printed circuit boards, filling resin into connection holes is a crucial process. However, due to the presence of air inside the back-drilled holes of the printed circuit board, during the resin curing stage, the resin for plugging holes is extremely prone to quality defects such as hole breakage and depression. These problems not only significantly increase the defective rate of printed circuit boards, reduce the production and processing efficiency, but also cause serious waste of resources in terms of cost and production capacity, hindering the efficient development of the printed circuit board production industry. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems existing in the prior art, and to propose a printed circuit board plugging hole device and method.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A printed circuit board plugging hole device and method, including a frame, a rotating plate is rotatably installed above the inside of the frame, a motor for driving the rotating plate to rotate is fixedly installed on the outer side wall above the frame, an upper processing mechanism is arranged above the inside of the rotating plate, a plurality of first ejector rods are uniformly and fixedly installed on the inner top wall of the rotating plate, the lower ends of the first ejector rods penetrate through the upper processing mechanism, a lower processing mechanism is arranged below the inside of the rotating plate, a plurality of second ejector rods are uniformly and fixedly installed on the inner bottom wall of the rotating plate, the upper ends of the second ejector rods penetrate through the lower processing mechanism, the number of the second ejector rods is the same as that of the first ejector rods, and their positions correspond one by one;

[0006] An installation plate is fixedly installed on one side of the upper end of the rotating plate, and a cutting mechanism is installed on the installation plate.

[0007] Preferably, the upper processing mechanism includes a first seat plate. A plurality of connecting columns are fixedly installed between the first seat plate and the inner bottom wall of the rotating plate. Below the first seat plate, a first top plate and a first working plate are sequentially arranged. The lower end of the first ejector rod sequentially penetrates through the first seat plate, the first top plate, and the first working plate. A third cylinder is fixedly installed on the upper surface of the first seat plate, and the output end of the third cylinder is fixedly connected to the first top plate. A first guiding component is arranged at the lower end of the first seat plate. The first guiding component includes guiding rods two fixedly connected to four corners at the lower end of the first seat plate. The lower ends of the guiding rods two are fixedly connected to the first working plate, and the guiding rods two slidably penetrate through the first top plate.

[0008] Preferably, a plurality of first bosses are fixedly connected to the lower end of the first top plate. The number of the first bosses is the same as that of the first ejector rods, and their positions correspond one by one. The first bosses are slidably sleeved on the outer side of the first ejector rods, and their outer walls are slidably connected to the inner wall of the first working plate. A sealing ring one made of rubber material is adhesively connected to the bottom end of the first boss.

[0009] Preferably, the lower processing mechanism includes a second working plate, a second top plate, and a second seat plate arranged in sequence from top to bottom. The upper end of the second ejector rod sequentially penetrates through the second seat plate, the second top plate, and the second working plate. The second working plate is fixedly connected to the second seat plate, and electric cylinders for clamping and fixing the circuit board are fixedly installed on both sides of the upper surface thereof. A first cylinder is fixedly installed on the bottom wall of the rotating plate, and the output end of the first cylinder is fixedly connected to the second top plate. A fourth cylinder is fixedly installed at the lower end of the second seat plate, and the output end of the fourth cylinder is fixedly connected to the second top plate. A second guiding component is arranged on the inner bottom wall of the rotating plate. The second guiding component includes a plurality of guiding rods one fixedly installed on the inner bottom wall of the rotating plate. The plurality of guiding rods one sequentially slidably penetrate through the second seat plate, the second top plate, and the second working plate, and a limiting block is fixedly installed at the top end of the guiding rods one. A groove matching with the limiting block is formed on the upper surface of the second working plate.

[0010] Preferably, a plurality of second bosses are fixedly connected to the upper end of the second top plate. The second bosses are slidably sleeved on the outer side of the second ejector rods, and their outer walls are slidably connected to the inner wall of the second working plate. A sealing ring two made of rubber material is adhesively connected to the top end of the second boss. A plurality of accommodating cavities are arranged in an annular array inside the upper part of the second ejector rod. A rotating rod is rotatably installed inside the accommodating cavity, and the rotation fulcrum of the rotating rod is located at a position slightly below the middle thereof. An airbag is installed on the outer side of the lower part inside the accommodating cavity. The airbag is supplied with air by an external device. The airbag is fixedly connected to one side below the rotating rod, and a knurled wheel is rotatably installed at the top end of the rotating rod.

[0011] Preferably, a vertically penetrating air extraction cavity is provided inside the first ejector rod. The top end of the air extraction cavity is connected to an external vacuum pump. A vertically penetrating feed cavity is provided inside the second ejector rod. The lower end of the feed cavity is connected to an external feed pump. A flowmeter is installed on the pipeline connecting the feed cavity and the feed pump. A heating coil is fixedly installed on the inner wall above the rotating plate. The heating coil is located between the first working plate and the second working plate.

[0012] Preferably, the cutting mechanism includes a second cylinder fixedly installed on the side of the mounting plate away from the rotating plate. A cutting knife is arranged between the rotating plate and the mounting plate, and the cutting knife is located between the first working plate and the second working plate. A push plate is fixedly installed on the cutting knife, and the push plate is fixedly connected to the output end of the second cylinder. The cutting knife is divided into upper and lower layers and is connected by side plates. The side plates are slidably connected to a guide rail slider device fixedly installed on the inner wall of the rotating plate. Knife heads are fixedly installed at both the front and rear ends of the upper and lower layers of the cutting knife. A grinding plate is fixedly attached to the rear of the blade of the knife head.

[0013] Preferably, a first dust suction cavity is formed inside the first working plate, and a second dust suction cavity is formed inside the second working plate. Both the first dust suction cavity and the second dust suction cavity are connected to an external dust collector through pipelines. A plurality of first dust suction ports communicating with the inside of the first dust suction cavity are formed on the lower surface of the first working plate, and a plurality of second dust suction ports communicating with the inside of the second dust suction cavity are formed on the upper surface of the second working plate.

[0014] Preferably, a wire mesh is detachably installed below the interior of the frame, and a waste box placed on the inner bottom wall of the frame is provided below the wire mesh.

[0015] A working method of a circuit board plugging hole device includes the following steps:

[0016] S1. Start the third cylinder and the fourth cylinder, so that they drive the first top plate and the second top plate to move respectively, extend the first boss and the second boss, and then place the circuit board on the second working plate under the guidance of the second ejector rod.

[0017] S2. Inflate the airbag through an external device, so as to extend the knurling wheel. Start the first cylinder to lift the second seat plate. During the lifting process, the knurling wheel knurls the plug hole wall and finely adjusts the position of the circuit board, and then start the electric cylinder to clamp the circuit board.

[0018] S3. After the vacuum pump evacuates the air in the plug holes, start the feed pump to send a certain amount of epoxy resin into each plug hole through the feed cavity for epoxy resin perfusion, and then bake and cure the epoxy resin in the circuit board through the heating coil.

[0019] S4. Start the third cylinder and the fourth cylinder again, so that the first boss and the second boss retract, and then start the second cylinder to push the cutting knife back and forth to cut off the epoxy resin and polish the cross section.

[0020] S5. Start the vacuum cleaner to adsorb the debris and dust generated during the cutting and cross-section grinding process of the epoxy resin through the first dust suction cavity, the first dust suction port, the second dust suction cavity, and the second dust suction port.

[0021] S6. Start the first cylinder again to drive the second seat plate to reset, the second ejector rod will eject the excess epoxy resin, and at the same time start the electric cylinder to reset it to release the clamping and fixing of the circuit board.

[0022] S7. Start the motor to drive the rotating plate to rotate 90 degrees, so that the waste falls into the waste box, and then the staff takes away the circuit board on the wire mesh.

[0023] Compared with the existing technology, the advantages of the present invention are as follows:

[0024] 1. In this application, efficient and precise positioning is achieved through the synergistic effect of the second ejector rod and the rotating rod. The second ejector rod serves as a guiding reference to ensure that the circuit board is quickly installed in place; the airbag pushes the rotating rod to make the knurling wheel contact the hole wall, and the fine-tuning force is amplified using the lever principle. While correcting the positioning deviation, uniform patterns are formed on the copper surface through the knurling process to improve the roughness of the hole wall. This integrated design of mechanical positioning and surface treatment not only avoids the low efficiency problem of manual adjustment but also significantly enhances the bonding strength between the epoxy resin and the hole wall, improves the interfacial bonding force, and effectively solves the quality hidden danger of resin shedding in traditional processes.

[0025] 2. In this application, a dual-channel fluid control system is adopted to optimize the process. The vacuum system of the first ejector rod can effectively eliminate the residual bubbles in the holes; the second ejector rod is equipped with an independent flow meter to accurately control the injection amount of the epoxy resin. At the same time, combined with the gradient temperature control of the induction heating coil, rapid curing of the resin can be achieved, effectively shortening the curing time.

[0026] 3. This application innovatively integrates a composite processing module of a cutter and a grinding plate. The double-layer cutter uses hard cutting heads to achieve high-precision synchronous cutting, and is equipped with a guide rail slider device to ensure the stable linear operation of the cutter; the instant grinding function reduces the roughness of the resin cross-section and makes it smoother. At the same time, the dust generated during grinding is sucked into the first dust suction cavity and the second dust suction cavity through the first dust suction port and the second dust suction port and sent into the vacuum cleaner to prevent dust particles from scratching the surface of the circuit board and ensure the health of on-site workers.

[0027] In summary, in this application, the rapid installation of the circuit board is ensured through the positioning of the second ejector rod, the position of the circuit board is fine-tuned through the action of the knurling wheel to ensure accurate positioning and improve the roughness of the plug hole wall. Bubbles are eliminated in a vacuum environment and the bonding force is ensured, the plug hole quality is improved to ensure the qualification rate of the circuit board. The cutter cuts and automatically grinds, greatly reducing the workload of the staff, improving production efficiency and saving costs. The dust is sucked away to prevent the circuit board from being scratched and protect on-site workers from dust damage. Description of the Drawings

[0028] Figure 1 Schematic diagram of the working process of a via filling device for a circuit board proposed by the present invention;

[0029] Figure 2 is Figure 1 The enlarged view of the structure at X in

[0030] Figure 3 is Figure 1 The enlarged view of the structure at Y in

[0031] Figure 4 Semi-sectional axonometric view of a via filling device for a circuit board proposed by the present invention;

[0032] Figure 5 is a partial sectional axonometric Figure 1 ;

[0033] Figure 6 is a partial sectional axonometric Figure 2 ;

[0034] Figure 7 Cross-sectional view of the upper part of the transfer board of a via filling device for a circuit board proposed by the present invention;

[0035] Figure 8 Cross-sectional view of the lower part of the transfer board of a via filling device for a circuit board proposed by the present invention;

[0036] Figure 9 is Figure 8 The enlarged view of the structure at Z in

[0037] Figure 10 Partial axonometric view of the cutting tool of a via filling device for a circuit board proposed by the present invention.

[0038] In the figure: 1 wire mesh, 2 waste box, 3 frame, 4 motor, 5 transfer board, 6 cylinder 1, 7 guide rod 1, 8 guide rod 2, 9 electric cylinder, 10 seat plate 1, 11 top plate 1, 12 working plate 1, 13 seat plate 2, 14 top plate 2, 15 working plate 2, 16 cylinder 2, 17 cutting tool, 18 cylinder 3, 19 cylinder 4, 20 heating coil, 31 mounting plate, 51 ejector rod 1, 511 air extraction chamber, 52 ejector rod 2, 521 feeding chamber, 522 accommodating chamber, 523 air bag, 524 rotating rod, 525 knurled wheel, 71 limit block, 101 connecting column, 111 convex platform 1, 112 sealing ring 1, 121 dust suction chamber 1, 122 dust suction port 1, 141 convex platform 2, 142 sealing ring 2, 151 groove, 152 dust suction chamber 2, 153 dust suction port 2, 171 push plate, 172 side plate, 173 tool bit, 174 grinding plate. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0040] Referring to Figures 1 to 10 , a circuit board plugging device is applied to the resin plugging work of the circuit board. It includes a frame 3. Above the inside of the frame 3, a rotating plate 5 is rotatably installed. On the outer side wall above the frame 3, a motor 4 for driving the rotating plate 5 to rotate is fixedly installed. Below the inside of the frame 3, a wire mesh 1 is detachably installed. Below the wire mesh 1, a waste box 2 placed on the inner bottom wall of the frame 3 is provided.

[0041] Above the inside of the rotating plate 5, a first seat plate 10 is provided. Between the first seat plate 10 and the inner bottom wall of the rotating plate 5, a plurality of connecting columns 101 are fixedly installed. On the upper surface of the first seat plate 10, a third cylinder 18 is fixedly installed. Below the first seat plate 10, a first top plate 11 and a first working plate 12 are sequentially arranged. The output end of the third cylinder 18 is fixedly connected to the first top plate 11. At the four corners of the lower end of the first seat plate 10, second guide rods 8 are fixedly connected. The lower ends of the second guide rods 8 are fixedly connected to the first working plate 12, and the second guide rods 8 slidably penetrate through the first top plate 11 to play a role in guiding the first top plate 11.

[0042] On the inner top wall of the rotating plate 5, a plurality of first ejector rods 51 are uniformly fixedly installed. The lower ends of the first ejector rods 51 sequentially penetrate through the first seat plate 10, the first top plate 11, and the first working plate 12. Inside the first ejector rod 51, a vertically penetrating air extraction cavity 511 is provided. The top end of the air extraction cavity 511 is connected to an external vacuum pump. The lower end of the first top plate 11 is fixedly connected with a plurality of first bosses 111. The number of the first bosses 111 is the same as that of the first ejector rods 51, and their positions correspond one by one. The first bosses 111 are slidably sleeved on the outer side of the first ejector rods 51, and their outer walls are slidably connected to the inner wall of the first working plate 12. A sealing ring 112 made of rubber material is adhesively bonded to the bottom end of the first boss 111.

[0043] Below the inner part of the turntable 5, a second working plate 15, a second top plate 14, and a second seat plate 13 are arranged in sequence from top to bottom. The second working plate 15 is fixedly connected to the second seat plate 13. A first cylinder 6 is fixedly installed on the bottom wall of the turntable 5, and the output end of the first cylinder 6 is fixedly connected to the second top plate 14. A fourth cylinder 19 is fixedly installed at the lower end of the second seat plate 13, and the output end of the fourth cylinder 19 is fixedly connected to the second top plate 14. A plurality of first guide rods 7 are fixedly installed on the inner bottom wall of the turntable 5. The plurality of first guide rods 7 sequentially penetrate through the second seat plate 13, the second top plate 14, and the second working plate 15 in a sliding manner, and a limiting block 71 is fixedly installed at the top end of the first guide rod 7. A groove 151 matching the limiting block 71 is formed on the upper surface of the second working plate 15, so that after the first cylinder 6 reaches the upper limit position, the limiting block 71 enters the groove 151 to prevent the second working plate 15 from slipping off. Electric cylinders 9 for clamping and fixing the circuit board are fixedly installed on both sides of the upper end surface of the second working plate 15.

[0044] A plurality of second ejector rods 52 are evenly and fixedly installed on the inner bottom wall of the turntable 5. The number of the second ejector rods 52 is the same as that of the first ejector rods 51, and their positions correspond one by one. The upper ends of the second ejector rods 52 sequentially penetrate through the second seat plate 13, the second top plate 14, and the second working plate 15. A vertically penetrating feeding cavity 521 is provided inside the second ejector rod 52. The lower end of the feeding cavity 521 is connected to an external feeding pump. The feeding pump is used to send a certain amount of epoxy resin into each plug hole through the feeding cavity 521 to ensure sufficient epoxy resin in the plug hole. A flow meter is installed on the pipeline connecting the feeding cavity 521 and the feeding pump. The flow meter is used to control the amount of epoxy resin sent by the feeding pump into the feeding cavity 521.

[0045] A plurality of second bosses 141 are fixedly connected to the upper end of the second top plate 14. The number of the second bosses 141 is the same as that of the second ejector rods 52, and their positions correspond one by one. The second bosses 141 are slidably sleeved on the outer sides of the second ejector rods 52, and their outer walls are slidably connected to the inner walls of the second working plate 15. A sealing ring 142 made of rubber material is adhesively bonded to the top end of the second boss 141.

[0046] A plurality of accommodating cavities 522 are arranged in an annular array inside the second ejector rod 52 above. A rotating rod 524 is rotatably installed inside the accommodating cavity 522. The rotation fulcrum of the rotating rod 524 is located at a position slightly below the middle. An airbag 523 is installed on the outer side of the lower part inside the accommodating cavity 522. The airbag 523 is supplied with gas by an external device. The airbag 523 is fixedly connected to one side below the rotating rod 524. Thus, during the process of the airbag 523 expanding or contracting, it can drive the lower end of the rotating rod 524 to move. With the cooperation of the fulcrum, the rotating rod 524 can rotate inside the accommodating cavity 522. The top end of the rotating rod 524 is rotatably installed with a knurled wheel 525. During the rotation of the rotating rod 524, it can control the knurled wheel 525 to extend out of the accommodating cavity 522 or enter the accommodating cavity 522.

[0047] One side of the upper end of the turntable 5 is fixedly installed with a mounting plate 31. On the side of the mounting plate 31 away from the turntable 5, a second cylinder 16 is fixedly installed. A cutting knife 17 is arranged between the turntable 5 and the mounting plate 31. At the same time, the cutting knife 17 is located between the first working plate 12 and the second working plate 15. A pushing plate 171 is fixedly installed on the cutting knife 17, and the pushing plate 171 is fixedly connected to the output end of the second cylinder 16. Thus, when the second cylinder 16 works, it can drive the cutting knife 17 to move. The cutting knife 17 is divided into upper and lower layers and is connected by side plates 172. Knife heads 173 are fixedly installed at the front and rear ends of the upper and lower layers of the cutting knife 17. A grinding plate 174 is fixedly attached to the rear of the blade of the knife head 173. The side plates 172 are slidably connected to a guide rail slider device fixedly installed on the inner wall of the turntable 5. The guide rail slider device is a prior art, and its specific structural design will not be elaborated here. It is used to guide the movement of the cutting knife 17 and ensure its stability during the movement.

[0048] A dust suction chamber one 121 is opened inside the first working plate 12, and a dust suction chamber two 152 is opened inside the second working plate 15. Both the dust suction chamber one 121 and the dust suction chamber two 152 are connected to an external vacuum cleaner through pipes. A plurality of dust suction ports one 122 communicating with the inside of the dust suction chamber one 121 are opened on the lower surface of the first working plate 12, and a plurality of dust suction ports two 153 communicating with the inside of the dust suction chamber two 152 are opened on the upper surface of the second working plate 15. A heating coil 20 is fixedly installed on the inner wall above the turntable 5. The heating coil 20 is located between the first working plate 12 and the second working plate 15. The coil in the heating coil 20 is energized to generate heat to heat the circuit board, and the epoxy resin is quickly cured under heating.

[0049] A working method of a circuit board plugging hole device includes the following steps:

[0050] S1. Start the third cylinder 18 and the fourth cylinder 19, so that they drive the first top plate 11 and the second top plate 14 to move respectively, extend the first boss 111 and the second boss 141, and then place the circuit board on the second working plate 15 under the guidance of the second ejector rod 52.

[0051] S2. Inflate the airbag 523 through an external device, so as to extend the knurling wheel 525. Start the first cylinder 6 to lift the second seat plate 13. During the lifting process, the knurling wheel 525 knurls the plugging hole wall and finely adjusts the position of the circuit board, and then start the electric cylinder 9 to clamp the circuit board.

[0052] S3. After the vacuum pump evacuates the plugging holes, start the feeding pump to send a certain amount of epoxy resin into each plugging hole through the feeding cavity 521 for epoxy resin perfusion, and then bake and cure the epoxy resin in the circuit board through the heating coil 20.

[0053] S4. Start cylinder three 18 and cylinder four 19 again to retract boss one 111 and boss two 141. Then start cylinder two 16 to push the cutter 17 back and forth through the push plate 171 to cut and grind the cross-section of the epoxy resin.

[0054] S5. Start the vacuum cleaner to adsorb the debris and dust generated during the cutting and cross-section grinding of the epoxy resin through the first suction cavity 121, the first suction port 122, the second suction cavity 152, and the second suction port 153.

[0055] S6. Start cylinder one 6 again to drive the second seat plate 13 to reset. The second ejector rod 52 ejects the excess epoxy resin. At the same time, start the electric cylinder 9 to reset it and release the clamping and fixing of the circuit board.

[0056] S7. Start the motor 4 to drive the rotating plate 5 to rotate 90 degrees, so that the waste falls into the waste box 2. Then the staff takes away the circuit board on the wire mesh 1.

[0057] When this application is working, the staff first place the circuit board on the second working plate 15. There is a second ejector rod 52 corresponding to each hole to be plugged on the circuit board. At the beginning, the top of the second ejector rod 52 is located above the working plate 15. The diameter of the second ejector rod 52 is smaller than the diameter of the plug hole. Under the guidance of the second ejector rod 52, the circuit board is placed on the second working plate 15. At this time, each second ejector rod 52 passes through each plug hole in turn. The airbag 523 is inflated to push the bottom of the rotating rod 524 inward. The rotating rod 524 rotates under the influence of the airbag 523 so that the top extends out of the accommodation cavity 522.

[0058] Then cylinder three 18 and cylinder four 19 extend to push the first top plate 11 and the second top plate 14 to move respectively, so that boss one 111 extends out of the first working plate 12, and boss two 141 extends out of the second working plate 15. Boss two 141 lifts the circuit board. Then under the guidance of the first guide rod 7, cylinder one 6 extends to drive the second seat plate 13 to drive the second top plate 14 and the second working plate 15 to move up uniformly. The knurled wheels 525 at the top of the rotating rods 524 on the second ejector rods 52 in the plug holes of the circuit board contact the plug hole walls. The circuit board is finely adjusted in position under the action of the knurled wheels 525. Then the electric cylinder 9 extends to clamp and fix the circuit board until the internal force sensor detects that the set value is reached and then stops extending to prevent the circuit board from deforming.

[0059] According to the lever principle, the force exerted by the knurling wheel 525 on the wall of the plug hole is much greater than the thrust of the airbag 523. As the circuit board moves upward, the knurling wheel 525 leaves knurling on the copper surface of the plug hole wall to increase the roughness and enhance the bonding force between the epoxy resin and the hole wall during subsequent plugging. After the cylinder 1 6 reaches the upper limit position, the limit block 71 enters the groove 151 to prevent the second working plate 15 from slipping. The first boss 111 and the second boss 141 clamp the circuit board in the middle. The first sealing ring 112 and the second sealing ring 142 made of rubber contact the upper and lower surfaces of the circuit board to ensure the sealing of each plug hole. Each first ejector rod 51 is provided with an air extraction chamber 511 which is connected to a vacuum pump. Each second ejector rod 52 is provided with a feeding chamber 521 which is connected to a feeding pump and independent flow meters are provided on the pipeline. The vacuum pump and the air extraction chamber 511 are used to evacuate each plug hole. After a certain period of time, the vacuum pump stops pumping air. Under the calculation and control of the flow meters, the feeding pump sends a certain amount of epoxy resin into each plug hole through the feeding chamber 521 to ensure sufficient epoxy resin in the plug holes. Subsequently, the coil in the heating coil 20 is energized to inductively heat the part of the circuit board. Under heating, the epoxy resin quickly cures. After a certain period of time, the cylinder 3 18 and the cylinder 4 19 reset, and the first boss 111 and the second boss 141 reset and retract. The circuit board is suspended between the first working plate 12 and the second working plate 15. The cylinder 2 16 quickly extends and pushes the cutting tool 17 through the push plate 171. The cutting tool 17 has two layers up and down and is connected together by the side plate 172. As the cylinder 2 16 advances, the cutting tool 17 enters the gap between the circuit board and the first working plate 12 and the second working plate 15 and quickly moves forward along the guide rail direction. The tool tip 173 cuts the cured epoxy resin and prevents the cutting tool 17 from running off track and deforming or chipping through the guide. Immediately after the tool tip 173, the grinding plate 174 flush with the surface of the circuit board grinds the epoxy resin cut surface on the side of the circuit board. The grinding dust is sucked into the first dust suction chamber 121 and the second dust suction chamber 152 through the first dust suction port 122 and the second dust suction port 153 and sent into the dust collector to prevent dust particles from scratching the surface of the circuit board and ensure the health of on-site workers. After the cylinder 2 16 drives the cutting tool 17 to move back and forth quickly for several times and then resets, the cylinder 1 6 immediately resets. The second ejector rod 52 ejects the excess epoxy resin. The electric cylinder 9 resets. Subsequently, the motor 4 drives the rotating plate 5 to rotate 90 degrees. The circuit board and the epoxy resin waste fall onto the wire mesh 1. The motor 4 resets. The worker takes away the circuit board and the waste falls into the waste box 2. The worker places the next circuit board on the second working plate 15 and repeats the previous operation to complete the plug hole work.

[0060] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circuit board plugging device, comprising a frame (3), characterized in that: A rotating plate (5) is rotatably mounted on the upper part of the frame (3); a motor (4) for driving the rotating plate (5) to rotate is fixedly mounted on the upper outer wall of the frame (3); an upper processing mechanism is arranged on the upper part of the rotating plate (5); a plurality of push rods (51) are evenly fixedly mounted on the upper wall of the rotating plate (5); the lower ends of the push rods (51) penetrate the upper processing mechanism; a lower processing mechanism is arranged on the lower part of the rotating plate (5); a plurality of push rods (52) are evenly fixedly mounted on the lower wall of the rotating plate (5); the upper ends of the push rods (52) penetrate the lower processing mechanism; the number of the push rods (52) is the same as that of the push rods (51), and the positions of the two are one-to-one corresponding; A mounting plate (31) is fixedly mounted on one side of the upper end of the rotating plate (5), and a cutting mechanism is mounted on the mounting plate (31).

2. The circuit board plugging device according to claim 1, characterized in that: The upper processing mechanism comprises a seat plate (10), a plurality of connecting columns (101) are fixedly installed between the seat plate (10) and the inner bottom wall of the rotating plate (5), a top plate (11) and a working plate (12) are arranged in sequence below the seat plate (10), the lower end of the top rod (51) passes through the seat plate (10), the top plate (11) and the working plate (12) in sequence, a cylinder (18) is fixedly installed on the upper surface of the seat plate (10), the output end of the cylinder (18) is fixedly connected to the top plate (11), and a first guide assembly is arranged at the lower end of the seat plate (10), the first guide assembly comprises a guide rod (8) fixedly connected to the four corners of the lower end of the seat plate (10), the lower end of the guide rod (8) is fixedly connected to the working plate (12), and the guide rod (8) slides through the top plate (11).

3. The circuit board plugging device according to claim 2, characterized in that: The lower end of the top plate (11) is fixedly connected to a plurality of bosses (111), the number of the bosses (111) is the same as that of the top rod (51), and the positions of the two correspond one to one, the bosses (111) are slidably sleeved on the outside of the top rod (51), and the outer wall of the bosses is slidably connected to the inner wall of the working plate (12), and the bottom end of the bosses (111) is glued with a sealing ring (112) made of rubber material.

4. The circuit board plugging device according to claim 3, characterized in that: The lower processing mechanism comprises a working plate 2 (15), a top plate 2 (14) and a seat plate 2 (13) which are arranged in sequence from top to bottom. The upper end of the top rod 2 (52) passes through the seat plate 2 (13), the top plate 2 (14) and the working plate 2 (15) in sequence. The working plate 2 (15) is fixedly connected to the seat plate 2 (13), and both sides of the upper end surface thereof are fixedly mounted with electric cylinders (9) for clamping and fixing the circuit board. The bottom wall of the rotating plate (5) is fixedly mounted with a cylinder 1 (6). The output end of the cylinder 1 (6) is fixedly connected to the top plate 2 (14). The lower end of the seat plate 2 (13) is fixedly mounted with a cylinder 1 (6). A cylinder four (19) is fixedly installed at the end, and the output end of the cylinder four (19) is fixedly connected to the top plate two (14). A second guide assembly is arranged on the inner bottom wall of the rotating plate (5), and the second guide assembly includes a plurality of guide rods one (7) fixedly installed on the inner bottom wall of the rotating plate (5). The plurality of guide rods one (7) slide through the seat plate two (13), the top plate two (14) and the working plate two (15) in sequence, and a limit block (71) is fixedly installed on the top end of the guide rod one (7), and a groove (151) matching with the limit block (71) is opened on the upper surface of the working plate two (15).

5. The circuit board plugging device according to claim 4, characterized in that: The upper end of the second top plate (14) is fixedly connected to a plurality of second bosses (141), the second bosses (141) are slidably sleeved on the outer side of the second top rod (52), and the outer wall thereof is slidably connected to the inner wall of the second working plate (15), the top of the second boss (141) is glued with a sealing ring (142) made of rubber material, the upper interior of the second top rod (52) is provided with a plurality of accommodating cavities (522) in a circular array, a rotating rod (524) is rotatably installed inside the accommodating cavity (522), the rotating fulcrum of the rotating rod (524) is located at the middle and lower position thereof, an air bag (523) is installed on the lower outer side of the accommodating cavity (522), the air bag (523) is supplied with air by an external device, the air bag (523) is fixedly connected to the lower side of the rotating rod (524), and a knurled wheel (525) is rotatably installed on the top of the rotating rod (524).

6. The circuit board plugging device according to claim 5, characterized in that: A vertically penetrating vacuum chamber (511) is provided inside the push rod one (51), and the top end of the vacuum chamber (511) is connected to an external vacuum pump. A vertically penetrating feed chamber (521) is provided inside the push rod two (52), and the lower end of the feed chamber (521) is connected to an external feeding pump. A flow meter is installed on the pipeline connecting the feed chamber (521) and the feeding pump. A heating ring (20) is fixedly installed on the inner wall above the rotating plate (5), and the heating ring (20) is located between the working plate one (12) and the working plate two (15).

7. The circuit board plugging device according to claim 6, characterized in that: The cutting mechanism comprises a second cylinder (16) fixedly mounted on a side of a mounting plate (31) away from a rotating plate (5); a cutting knife (17) is arranged between the rotating plate (5) and the mounting plate (31), and the cutting knife (17) is located between the first working plate (12) and the second working plate (15); a push plate (171) is fixedly mounted on the cutting knife (17), and the push plate (171) is fixedly connected to the output end of the second cylinder (16); the cutting knife (17) is divided into an upper and lower layers and connected through a side plate (172); the side plate (172) is slidably connected to a guide rail slider device fixedly mounted on the inner wall of the rotating plate (5); and a cutter head (173) is fixedly mounted on both front and rear ends of the upper and lower layers of the cutting knife (17); a grinding plate (174) is fixedly attached to the rear of the blade of the cutter head (173).

8. The circuit board plugging device according to claim 7, characterized in that: The working plate 1 (12) is provided with a dust suction chamber 1 (121) inside, and the working plate 2 (15) is provided with a dust suction chamber 2 (152) inside. The dust suction chamber 1 (121) and the dust suction chamber 2 (152) are both connected to an external dust collector through a pipeline. The lower end surface of the working plate 1 (12) is provided with a plurality of dust suction ports 1 (122) connected to the inside of the dust suction chamber 1 (121), and the upper end surface of the working plate 2 (15) is provided with a plurality of dust suction ports 2 (153) connected to the inside of the dust suction chamber 2 (152).

9. The circuit board plugging device according to claim 8, characterized in that: A wire mesh (1) is detachably installed at the lower part of the interior of the frame (3), and a waste box (2) is provided below the wire mesh (1) and is placed on the inner bottom wall of the frame (3).

10. A working method of a circuit board plugging device, characterized in that: The circuit board plugging device according to claim 9 further comprises the following steps: S1, start the cylinder three (18) and the cylinder four (19), so that they drive the top plate one (11) and the top plate two (14) to move respectively, and extend the boss one (111) and the boss two (141), and then place the circuit board on the working plate two (15) under the guidance of the top rod two (52); S2, inflating the airbag (523) through external equipment, thereby extending the knurling wheel (525), starting the cylinder one (6) to lift the seat plate two (13), during which the knurling wheel (525) knurls the plug hole wall and fine-tunes the position of the circuit board, and then starting the electric cylinder (9) to clamp the circuit board; S3, after the vacuum pump evacuates the plug holes, the feeding pump is started to feed a certain amount of epoxy resin into each plug hole through the feeding cavity (521) for epoxy resin infusion, and then the epoxy resin in the circuit board is baked and cured by the heating ring (20); S4, start the cylinder three (18) and the cylinder four (19) again to retract the boss one (111) and the boss two (141), and then start the cylinder two (16) to push the cutting knife (17) back and forth through the push plate (171) to cut the epoxy resin and grind the cross section; S5, starting the vacuum cleaner to absorb the debris and dust generated during the cutting and cross-section grinding of the epoxy resin through the vacuum chamber 1 (121), the vacuum port 1 (122), the vacuum chamber 2 (152) and the vacuum port 2 (153); S6, start the air cylinder 1 (6) again to drive the seat plate 2 (13) to reset, and the ejector rod 2 (52) ejects the excess epoxy resin, and at the same time start the electric cylinder (9) to reset it, thereby releasing the clamping fixation of the circuit board; S7, start the motor (4) to drive the rotating plate (5) to rotate 90 degrees, so that the waste falls into the waste box (2), and then the staff takes away the circuit board on the wire mesh (1).

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