PCB multilayer circuit board drilling device

Abstract

The application discloses a PCB multilayer circuit board drilling device and relates to the related technical field of printed circuit boards, which comprises a workbench, a portal frame arranged on the workbench, and an electric guide rail arranged on the portal frame, and further comprises: a mounting seat fixedly installed on the electric guide rail, an electric push rod arranged on the mounting seat, an output end of the electric push rod, a mounting plate fixedly installed on the output end of the electric push rod, a lower surface of the mounting plate, a collecting cover fixedly installed on the lower surface of the mounting plate, a plurality of dust suction holes formed in the bottom of the collecting cover, a driving motor arranged on the lower surface of the mounting plate, an output end of the driving motor, a rotating shaft fixedly installed on the output end of the driving motor, and a drill bit fixedly installed on the bottom end of the rotating shaft; after drilling is completed, the drill bit immediately rises to trigger a cleaning ring action, the PCB board does not need to be transferred to an independent cleaning station for cleaning operation on the orifice and the drill bit again, a secondary positioning link of a workpiece in a traditional device is omitted, time and labor are saved, and the processing efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of printed circuit board technology, specifically to a drilling device for multilayer PCB circuit boards. Background Technology

[0002] PCB multilayer boards refer to multilayer circuit boards used in electrical products. They are also called multilayer printed circuit boards. Some PCB multilayer boards are made using liquid non-ferrous metals as raw materials. Multilayer boards use more single-sided or double-sided wiring boards. They are printed circuit boards with one double-sided board as the inner layer and two single-sided boards as the outer layer, or two double-sided boards as the inner layer and two single-sided boards as the outer layer. They are printed circuit boards that are alternately connected by a positioning system and insulating adhesive materials, and the conductive patterns are interconnected according to the design requirements. In the manufacturing process of multilayer PCB circuit boards, drilling is one of the key steps, and its processing accuracy and efficiency directly affect the performance of the circuit board. Existing drilling equipment has the following defects: First, burrs and debris from drilling easily remain on the circuit board surface after drilling, leading to short circuits or reduced insulation performance during subsequent processing. This necessitates a separate cleaning process to reposition and clean the PCB, reducing processing efficiency. Furthermore, the drill bit needs to be cleaned separately before and after drilling to ensure its subsequent processing accuracy, making the operation inconvenient. Second, existing drilling devices require aluminum cover plates and pads on the top and bottom sides of the circuit board to improve hole position accuracy during processing. However, these need to be fixed to the top and bottom sides of the circuit board using a pinning machine before drilling can begin. This processing method is inconvenient and requires subsequent board disassembly, further impacting the processing efficiency of multilayer PCBs. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a drilling device for multilayer PCB circuit boards.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: This invention discloses a drilling device for multilayer PCB circuit boards, comprising a worktable, a gantry frame mounted on the worktable, an electric guide rail mounted on the gantry frame, and further comprising: Mounting base: The mounting base is fixedly mounted on the electric guide rail, and an electric push rod is provided on it. The output end of the electric push rod is fixedly mounted with a mounting plate. A collection cover is fixedly mounted on the lower surface of the mounting plate. Several dust suction holes are opened at the bottom of the collection cover. Drive motor: The drive motor is set on the lower surface of the mounting plate, and a rotating shaft is fixedly installed at its output end. A drill bit is fixedly installed at the bottom end of the rotating shaft. A cleaning assembly is provided on the outer surface of the rotating shaft, and a cleaning ring is provided through the cleaning assembly for removing burrs generated during drilling and for cleaning the drill bit. Base: The base is fixedly installed on the workbench, and a clamping component for clamping and fixing the PCB board is provided on it.

[0005] As a preferred embodiment of the present invention, the cleaning assembly includes a bushing rotatably mounted on the outer surface of a rotating shaft and a movable ring slidably mounted on the bushing. The cleaning ring is fixedly mounted on the bottom of the movable ring. A first bevel gear is fixedly mounted on the rotating shaft, and a second bevel gear is fixedly mounted on the bushing. A bracket is fixedly mounted on the bushing, and a transmission gear is rotatably mounted on the bracket. Both the first and second bevel gears mesh with the transmission gear. A connecting rod is fixedly mounted on the mounting base. A spiral groove is formed on the connecting rod. A circular hole is formed on the mounting plate for the connecting rod to slide through. An insert rod is formed in the circular hole, and the insert rod cooperates with the spiral groove.

[0006] As a preferred embodiment of the present invention, a bidirectional lead screw is fixedly installed at the bottom end of the connecting rod, and an upper connecting block and a lower connecting block are respectively threaded onto the outer surfaces of the threads at both ends of the bidirectional lead screw. The upper connecting block is fixedly connected to the bushing, and the lower connecting block is fixedly connected to the moving ring.

[0007] As a preferred embodiment of the present invention, the first bevel gear and the second bevel gear are symmetrically arranged and located on both sides of the transmission gear.

[0008] As a preferred embodiment of the present invention, a plurality of limiting blocks are fixedly installed on the outer surface of the bushing, and a limiting groove is provided on the moving ring to cooperate with the limiting blocks. The limiting blocks slide in the limiting groove on the same side.

[0009] As a preferred embodiment of the present invention, a cotton pad is fixedly installed on the inner circle of the cleaning ring, and a plurality of brush plates and scrapers are fixedly installed on the outer circle of the cleaning ring, with the brush plates and scrapers arranged alternately.

[0010] As a preferred embodiment of the present invention, the collection cover is connected to a suction pipe, which is connected to an external air pump.

[0011] As a preferred embodiment of the present invention, a plurality of the dust suction holes are evenly distributed in an array along the circumference of the drill bit, the dust suction holes are conical in shape, and the diameter of the dust suction holes gradually increases from top to bottom.

[0012] As a preferred embodiment of the present invention, the clamping assembly includes an electric turntable disposed in a base. The base has a plurality of sliding grooves, and a connecting column is slidably mounted in each of the sliding grooves. A hinge rod is hinged to the bottom end of the connecting column, and the end of the hinge rod away from the connecting column on the same side is hinged to the electric turntable. A clamping plate is fixedly mounted on the top end of the connecting column.

[0013] As a preferred embodiment of the present invention, the connecting column has a rectangular cross-section, the sliding groove is a rectangular sliding groove, and the connecting column slides in close contact with the rectangular sliding groove on the same side.

[0014] The beneficial effects of this invention are: 1. This PCB multilayer circuit board drilling device, by setting up a cleaning component, a drive motor, a rotating shaft and a drill bit, after the drilling operation is completed, the electric push rod drives the mounting plate to move upward, and drives the connecting rod and the double-sided lead screw to reverse, so that the transmission gear meshes with the first bevel gear. The lower connecting block drives the moving ring and the cleaning ring to move downward, and under the transmission of the first bevel gear, the transmission gear and the second bevel gear, the cleaning ring rotates. The rotation of the cleaning ring can clean the burrs at the hole opening and the drill bit, removing the burrs generated at the hole opening and the powder and debris attached to the drill bit. That is, after the drilling is completed, the drill bit immediately rises to trigger the cleaning ring action. There is no need to transfer the PCB board to an independent cleaning station for cleaning the hole opening and the drill bit again. This eliminates the secondary positioning of the workpiece in traditional equipment, saving time and effort and greatly improving processing efficiency. 2. This PCB multilayer circuit board drilling device, by setting up a cleaning component, during drilling operation, the electric push rod pushes the mounting plate and drive motor to move downwards, and drives the insertion rod to move in the spiral groove, which in turn drives the connecting rod to rotate. The rotation of the connecting rod drives the bidirectional lead screw to rotate as well. The rotation of the bidirectional lead screw causes the upper connecting block and the lower connecting block to move closer to each other. That is, the upper connecting block drives the bushing to move downwards, and the lower connecting block drives the moving ring to move upwards. The upward movement of the moving ring drives the cleaning ring to move upwards as well. The upward movement of the cleaning ring can clean the drill bit, preventing impurities attached to the drill bit from interfering with subsequent drilling operations. There is no need for manual cleaning of the drill bit before drilling, and the cleaning ring also avoids interference with the subsequent drilling operation of the drill bit.

[0015] 3. This PCB multilayer circuit board drilling device, by setting up an air pump, a dust suction pipe and a dust suction hole, allows the external air pump to clean and absorb the waste generated by the drill bit during drilling through the dust suction pipe and dust suction hole, avoiding the splashing of waste generated during drilling and causing contamination of the PCB multilayer circuit board. At the same time, after drilling is completed, the waste powder brushed off by the cleaning ring can be absorbed and collected, realizing the simultaneous cleaning of holes and drill bits and collection and absorption of swept-off waste powder, further improving the cleaning effect of PCB multilayer circuit boards.

[0016] 4. This PCB multilayer circuit board drilling device, through the setting of clamping components, uses an electric turntable to rotate and drive several connecting posts to move closer together via hinged rods. The movement of the connecting posts causes the clamping plates to move accordingly, so that the clamping plates move closer together to clamp and fix the stacked boards, preventing misalignment between the boards during processing. It can also be used to clamp and fix PCB multilayer circuit boards of different sizes. Similarly, the electric turntable can rotate in the opposite direction to move the clamping plates away from each other, thus releasing the clamping and fixing of the stacked boards. It is simple to operate and convenient to use, eliminating the need to nail the stacked boards before drilling and to disassemble the boards after drilling, saving time and effort and increasing work efficiency.

[0017] 5. This PCB multilayer circuit board drilling device, by setting the first bevel gear and the second bevel gear symmetrically arranged, allows the rotating shaft and the cleaning ring to rotate in opposite directions. The reverse rotation design of the cleaning ring makes the contact direction between the cleaning ring and the hole wall opposite to the drilling cutting direction, which not only enhances the burr removal effect, but also reduces the wear rate of the cleaning ring. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a PCB multilayer circuit board drilling device according to the present invention; Figure 2 This is a schematic diagram of the collection cover structure of a PCB multilayer circuit board drilling device according to the present invention; Figure 3 This is a schematic diagram of the connecting rod structure of a PCB multilayer circuit board drilling device according to the present invention; Figure 4 yes Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This is a schematic diagram of the bidirectional lead screw structure of a PCB multilayer circuit board drilling device according to the present invention; Figure 6 This is a schematic diagram of the cleaning ring structure of a PCB multilayer circuit board drilling device according to the present invention; Figure 7 This is a schematic diagram of the dust extraction hole structure of a PCB multilayer circuit board drilling device according to the present invention; Figure 8 This is a schematic diagram of the chute structure of a PCB multilayer circuit board drilling device according to the present invention; Figure 9 This is a schematic diagram of the electric turntable structure of a PCB multilayer circuit board drilling device according to the present invention.

[0019] In the diagram: 1. Workbench; 2. Gantry frame; 3. Electric guide rail; 4. Mounting base; 5. Electric push rod; 6. Mounting plate; 7. Collection hood; 8. Dust suction pipe; 9. Drive motor; 10. Rotating shaft; 11. Drill bit; 12. Cleaning assembly; 121. Bushing; 122. Moving ring; 123. Cleaning ring; 124. First bevel gear; 125. Second bevel gear; 126. Bracket; 127. Transmission gear; 128. Connecting rod; 129. Double... 1210. Lead screw; 1211. Upper connecting block; 1212. Lower connecting block; 1213. Spiral groove; 1214. Round hole; 1215. Insert rod; 1216. Limiting block; 1217. Limiting groove; 1218. Cotton pad; 1219. Brush plate; 1210. Scraper; 13. Base; 14. Clamping assembly; 141. Electric turntable; 142. Slide groove; 143. Connecting column; 144. Hinge rod; 145. Clamping plate; 15. Dust suction hole. Detailed Implementation

[0020] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0021] Example: Figures 1 to 9 As shown, the present invention provides a PCB multilayer circuit board drilling device, including a worktable 1, a gantry frame 2 mounted on the worktable 1, an electric guide rail 3 mounted on the gantry frame 2, and further comprising: Mounting base 4: Mounting base 4 is fixedly installed on electric guide rail 3. Electric push rod 5 is provided on it and mounting plate 6 is fixedly installed on the output end of electric push rod 5. Collection cover 7 is fixedly installed on the lower surface of mounting plate 6. Several dust suction holes 15 are opened at the bottom of collection cover 7. Drive motor 9: Drive motor 9 is set on the lower surface of mounting plate 6. A rotating shaft 10 is fixedly installed at its output end. A drill bit 11 is fixedly installed at the bottom end of the rotating shaft 10. A cleaning assembly 12 is provided on the outer surface of the rotating shaft 10, and a cleaning ring 123 is provided through the cleaning assembly 12 for removing burrs generated during drilling and for cleaning the drill bit 11. Base 13: Base 13 is fixedly installed on workbench 1, and clamping assembly 14 for clamping and fixing PCB board is provided on it.

[0022] Specifically, the gantry 2 can drive the drive motor 9 and the drill bit 11 to move along the Y-axis, the electric guide rail 3 can drive the drive motor 9 and the drill bit 11 to move along the X-axis, and then the extension and retraction of the electric push rod 5 can drive the drive motor 9 and the drill bit 11 to move along the Z-axis. The position of the drill bit 11 can be conveniently adjusted according to the needs of use. Then the drive motor 9 can drive the rotating shaft 10 and the drill bit 11 to rotate, so that drilling can be performed at various parts of the PCB multilayer circuit board. The operation is simple, practical and convenient.

[0023] Among them, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the cleaning assembly 12 includes a bushing 121 rotatably mounted on the outer surface of the rotating shaft 10 and a movable ring 122 slidably mounted on the bushing 121. A cleaning ring 123 is fixedly mounted on the bottom of the movable ring 122. A first bevel gear 124 is fixedly mounted on the rotating shaft 10, and a second bevel gear 125 is fixedly mounted on the bushing 121. A bracket 126 is fixedly mounted on the bushing 121, and a transmission gear 127 is rotatably mounted on the bracket 126. Both the first bevel gear 124 and the second bevel gear 125 mesh with the transmission gear 127. The mounting base 4 is fixedly mounted with... The device is equipped with a connecting rod 128, which has a spiral groove 1212. The mounting plate 6 has a circular hole 1213 for the connecting rod 128 to slide through. A rod 1214 is inserted into the circular hole 1213 and works in conjunction with the spiral groove 1212. A double-ended lead screw 129 is fixedly installed at the bottom end of the connecting rod 128. An upper connecting block 1210 and a lower connecting block 1211 are respectively threaded onto the outer surfaces of the threads at both ends of the double-ended lead screw 129. The upper connecting block 1210 is fixedly connected to the bushing 121, and the lower connecting block 1211 is fixedly connected to the moving ring 122.

[0024] In detail, during the drilling operation, the electric push rod 5 pushes the mounting plate 6 and the drive motor 9 downwards. The drive motor 9 drives the rotating shaft 10 and the drill bit 11 to rotate and drill holes in the PCB multilayer circuit board. As the electric push rod 5 pushes the mounting plate 6 downwards, it causes the insertion rod 1214 to move within the spiral groove 1212, which in turn drives the connecting rod 128 to rotate. The rotation of the connecting rod 128 causes the bidirectional lead screw 129 to rotate accordingly. The rotation of the bidirectional lead screw 129 causes the upper connecting block 1210 and the lower connecting block 1211 to interact. When the upper connecting block 1210 moves the bushing 121 downwards, the lower connecting block 1211 moves the moving ring 122 upwards, and the moving ring 122 moves the cleaning ring 123 upwards accordingly. The upward movement of the cleaning ring 123 can clean the drill bit 11, preventing impurities attached to the drill bit 11 from interfering with subsequent drilling operations. This eliminates the need for manual cleaning of the drill bit 11 before drilling and also prevents the cleaning ring 123 from interfering with the subsequent turning operation of the drill bit 11. After the drilling operation is completed, the electric push rod 5... The moving mounting plate 6 moves upward, causing the connecting rod 128 and the double-acting lead screw 129 to reverse, thus moving the upper connecting block 1210 and the lower connecting block 1211 away from each other. The upper connecting block 1210 drives the bushing 121 and the bracket 126 to move upward, causing the transmission gear 127 to mesh with the first bevel gear 124. The lower connecting block 1211 drives the moving ring 122 and the cleaning ring 123 to move downward. At this time, the electric push rod 5 stops retracting, and the rotating shaft 10 rotates, causing the first bevel gear 124 to rotate accordingly. The rotation of the first bevel gear 124 drives the second bevel gear 125 and the bushing 121 to rotate via the transmission gear 127. The rotation of the bushing 121 drives the moving ring 122 and the cleaning ring 123 to rotate as well. The rotation of the cleaning ring 123 can clean the burrs at the hole opening and the drill bit 11, removing the burrs generated at the hole opening and the powder and debris attached to the drill bit 11. There is no need to perform subsequent cleaning operations on the hole opening and the drill bit 11. After drilling is completed, the drill bit 11 immediately rises and triggers the action of the cleaning ring 123. There is no need to transfer the PCB board to a separate cleaning station, saving time and effort and greatly improving processing efficiency. When the drill bit 11 descends to drill, it drives the cleaning ring 123 to move upward, avoiding any impact on the drilling process and simultaneously cleaning the drill bit 11. When the drilling is completed and the drill bit 11 rises back upward, it drives the cleaning ring 123 to move downward. Under the transmission of the first bevel gear 124, the transmission gear 127, and the second bevel gear 125, the cleaning ring 123 rotates. The rotation of the cleaning ring 123 can clean the burrs at the hole opening and the drill bit 11. Through the seamless connection between the drilling and deburring processes, the secondary positioning of the workpiece in traditional equipment is eliminated, improving processing efficiency. At the same time, the drill bit 11 can be cleaned again after the drilling operation is completed, preventing the waste chips and powder adhering to the drill bit 11 from affecting the drilling accuracy and effect.

[0025] Furthermore, such as Figure 3 and Figure 5 As shown, the first bevel gear 124 and the second bevel gear 125 are symmetrically arranged and located on both sides of the transmission gear 127. The symmetrical arrangement of the first bevel gear 124 and the second bevel gear 125 allows the rotating shaft 10 and the cleaning ring 123 to rotate in opposite directions. The reverse rotation design of the cleaning ring 123 makes the contact direction between the cleaning ring 123 and the hole wall opposite to the drilling cutting direction, which enhances the burr removal effect and reduces the wear rate of the cleaning ring 123.

[0026] Furthermore, such as Figure 3 and Figure 5 As shown, several limiting blocks 1215 are fixedly installed on the outer surface of the bushing 121. The moving ring 122 is provided with a limiting groove 1216 that cooperates with the limiting blocks 1215. The limiting blocks 1215 slide in the limiting groove 1216 on the same side. Through the cooperation of the limiting blocks 1215 and the limiting groove 1216, the bushing 121 can smoothly drive the moving ring 122 to rotate when it rotates. At the same time, the movement of the moving ring 122 on the bushing 121 can be guided and limited to ensure the stability of the relative movement of the moving ring 122 and the bushing 121.

[0027] Furthermore, such as Figure 6 As shown, a cotton pad 1217 is fixedly installed on the inner circle of the cleaning ring 123, and several brush plates 1218 and scrapers 1219 are fixedly installed on the outer circle of the cleaning ring 123. The brush plates 1218 and scrapers 1219 are arranged alternately. Through the alternating arrangement of the brush plates 1218 and scrapers 1219, the scrapers 1219 can effectively scrape off the burrs inside the hole and the upper edge of the hole, and the brush plates 1218 can remove the waste powder attached to the inner wall of the hole, ensuring the cleaning effect of the cleaning ring 123 on burrs and waste powder. The cotton pad 1217 can remove the waste powder attached to the drill bit 11 without causing damage to the drill bit 11.

[0028] Among them, such as Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, a suction pipe 8 is connected to the collection cover 7, and the suction pipe 8 is connected to an external air pump.

[0029] In this embodiment, a dust-collecting chamber is provided inside the collection cover 7, and one end of the dust-collecting pipe 8 extends into the dust-collecting chamber; When the drill bit 11 is drilling, the external air pump is activated. The external air pump cleans and absorbs the debris generated by the drill bit 11 during drilling through the suction pipe 8 and suction hole 15, avoiding the debris from splashing and causing contamination of the PCB multilayer circuit board. At the same time, after drilling is completed, the debris powder brushed off by the cleaning ring 123 during cleaning can be absorbed and collected. This achieves the simultaneous cleaning of the holes and the drill bit 11 and the collection and absorption of the swept debris powder, further improving the cleaning effect on the PCB multilayer circuit board.

[0030] Among them, such as Figure 3 , Figure 4 and Figure 7 As shown, several suction holes 15 are evenly distributed in an array along the circumference of the drill bit 11. The shape of the suction holes 15 is conical, and the diameter of the suction holes 15 gradually increases from top to bottom. The even array distribution of the suction holes 15 along the circumference of the drill bit 11 can fully collect and adsorb the waste chips and powder generated by the drill bit 11, avoiding the formation of adsorption dead zones. The gradual increase in the diameter of the suction holes 15 from top to bottom can increase the flow rate of gas entering the suction holes 15 and enhance the dust collection effect of the suction holes 15.

[0031] Among them, such as Figure 1 , Figure 8 and Figure 9 As shown, the clamping assembly 14 includes an electric turntable 141 disposed in the base 13. The base 13 has several sliding grooves 142. A connecting post 143 is slidably installed in each sliding groove 142. A hinge rod 144 is hinged to the bottom end of the connecting post 143. The end of the hinge rod 144 away from the connecting post 143 on the same side is hinged to the electric turntable 141. A clamping plate 145 is fixedly installed at the top end of the connecting post 143.

[0032] Specifically, an aluminum cover plate, a multi-layer circuit board, and a pad are stacked together to form a stack, which is then placed on a base 13. An electric turntable 141 rotates, driving several connecting posts 143 to move closer together via a hinge rod 144. The movement of the connecting posts 143 causes the clamping plates 145 to follow suit, clamping and fixing the stack to prevent misalignment during processing. This method is suitable for clamping and fixing PCBs of different sizes. Similarly, rotating the electric turntable 141 in the opposite direction moves the clamping plates 145 away, releasing the stack. The operation is simple and convenient, eliminating the need for nailing the stack before drilling or disassembling it after drilling, saving time and effort and increasing work efficiency.

[0033] Among them, such as Figure 8As shown, the cross-section of the connecting column 143 is rectangular, and the slide groove 142 is a rectangular slide groove 142. The connecting column 143 slides in close contact with the rectangular slide groove 142 on the same side. The connecting column 143 and the slide groove 142 are set as rectangles that cooperate with each other, which can effectively prevent the connecting column 143 from shifting or rotating when it moves in the slide groove 142, and ensure the stability of the connecting column 143 when it moves in the slide groove 142.

[0034] During operation, the aluminum sheet cover, multi-layer circuit board and pad are stacked together to form a stack, and the stack is placed on the base 13. Then, the electric turntable 141 rotates and drives several connecting posts 143 to move closer to each other through the hinge rod 144. The movement of the connecting posts 143 drives the clamping plate 145 to move accordingly, so that the several clamping plates 145 move closer to each other to clamp and fix the stack. The electric push rod 5 pushes the mounting plate 6 and the drive motor 9 downward. The drive motor 9 drives the rotating shaft 10 and the drill bit 11 to rotate and perform drilling operations on the PCB multilayer circuit board. During the downward movement of the mounting plate 6, the electric push rod 5 drives the insertion rod 1214 to move in the spiral groove 1212, which in turn drives the connecting rod 128 to rotate. The rotation of the connecting rod 128 drives the bidirectional lead screw 129 to rotate as well. The rotation of the bidirectional lead screw 129 causes the upper connecting block 1210 and the lower connecting block 1211 to move closer to each other. That is, the upper connecting block 1210 drives the bushing 121 to move downward, and the lower connecting block 1211 drives the moving ring 122 to move upward. The upward movement of the moving ring 122 drives the cleaning ring 123 to move upward as well. The upward movement of the cleaning ring 123 can clean the drill bit 11 and prevent impurities attached to the drill bit 11 from interfering with the subsequent drilling operation. At the same time, it also prevents the cleaning ring 123 from interfering with the subsequent drilling operation of the drill bit 11. Then the drive motor 9 drives the rotating shaft 10 and the drill bit 11 to perform drilling operations. When the drill bit 11 is drilling, the external air pump is started. The external air pump cleans and absorbs the debris generated by the drill bit 11 during drilling through the dust suction pipe 8 and the dust suction hole 15, so as to avoid the debris generated during drilling from splashing and causing contamination of the PCB multilayer circuit board. After drilling is completed, the electric push rod 5 drives the mounting plate 6 upward. The upward movement of the mounting plate 6 causes the connecting rod 128 and the double-acting lead screw 129 to reverse, causing the upper connecting block 1210 and the lower connecting block 1211 to move away from each other. The upper connecting block 1210 drives the bushing 121 and the bracket 126 upward, causing the transmission gear 127 to mesh with the first bevel gear 124. The lower connecting block 1211 drives the moving ring 122 and the cleaning ring 123 downward. At this time, the electric push rod 5 stops retracting, and the rotating shaft 10 rotates, causing the first bevel gear 124 to rotate as well. The rotation of the first bevel gear 124 drives the second bevel gear 125 and the bushing 1210 through the transmission gear 127. 1. Rotation of the bushing 121 causes the moving ring 122 and the cleaning ring 123 to rotate accordingly. The rotation of the cleaning ring 123 can clean the burrs at the hole opening and the drill bit 11, removing the burrs generated at the hole opening and the powder and debris attached to the drill bit 11. No further cleaning operation is required for the hole opening and the drill bit 11. The air pump can absorb and collect the waste powder brushed off by the cleaning ring 123 during cleaning. This achieves the simultaneous cleaning of the hole and the drill bit 11 and the collection and absorption of the swept waste powder, further improving the cleaning effect on the PCB multilayer circuit board. That is, after drilling is completed, the drill bit 11 immediately rises to trigger the action of the cleaning ring 123, without the need to transfer the PCB board to a separate cleaning station, saving time and effort and greatly improving processing efficiency.

[0035] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drilling device for multilayer PCB circuit boards, comprising a worktable (1), a gantry frame (2) mounted on the worktable (1), and an electric guide rail (3) mounted on the gantry frame (2), characterized in that, Also includes: Mounting base (4): The mounting base (4) is fixedly mounted on the electric guide rail (3), and an electric push rod (5) is provided on it. The output end of the electric push rod (5) is fixedly mounted on a mounting plate (6). A collection cover (7) is fixedly mounted on the lower surface of the mounting plate (6). Several dust suction holes (15) are opened at the bottom of the collection cover (7). Drive motor (9): The drive motor (9) is set on the lower surface of the mounting plate (6), and a rotating shaft (10) is fixedly installed at its output end. A drill bit (11) is fixedly installed at the bottom end of the rotating shaft (10). A cleaning assembly (12) is provided on the outer surface of the rotating shaft (10), and a cleaning ring (123) for removing burrs generated during drilling and cleaning the drill bit (11) is provided through the cleaning assembly (12). Base (13): The base (13) is fixedly installed on the workbench (1), and a clamping assembly (14) for clamping and fixing the PCB board is provided thereon.

2. The PCB multilayer circuit board drilling device according to claim 1, characterized in that, The cleaning assembly (12) includes a bushing (121) rotatably mounted on the outer surface of a rotating shaft (10) and a movable ring (122) slidably mounted on the bushing (121). The cleaning ring (123) is fixedly mounted on the bottom of the movable ring (122). A first bevel gear (124) is fixedly mounted on the rotating shaft (10), and a second bevel gear (125) is fixedly mounted on the bushing (121). A bracket (126) is fixedly mounted on the bushing (121), and a [missing information - likely a gear or component] is rotatably mounted on the bracket (126). The transmission gear (127), the first bevel gear (124) and the second bevel gear (125) are meshed with the transmission gear (127). A connecting rod (128) is fixedly installed on the mounting base (4). A spiral groove (1212) is provided on the connecting rod (128). A circular hole (1213) is provided on the mounting plate (6) for the connecting rod (128) to slide through. An insert rod (1214) is provided in the circular hole (1213). The insert rod (1214) is used in conjunction with the spiral groove (1212).

3. The PCB multilayer circuit board drilling device according to claim 2, characterized in that, A bidirectional lead screw (129) is fixedly installed at the bottom end of the connecting rod (128). An upper connecting block (1210) and a lower connecting block (1211) are respectively threaded on the outer surfaces of the threads at both ends of the bidirectional lead screw (129). The upper connecting block (1210) is fixedly connected to the bushing (121), and the lower connecting block (1211) is fixedly connected to the moving ring (122).

4. The PCB multilayer circuit board drilling device according to claim 3, characterized in that, The first bevel gear (124) and the second bevel gear (125) are symmetrically arranged and located on both sides of the transmission gear (127).

5. A PCB multilayer circuit board drilling device according to claim 3, characterized in that, A number of limiting blocks (1215) are fixedly installed on the outer surface of the bushing (121). The moving ring (122) is provided with a limiting groove (1216) for use with the limiting blocks (1215). The limiting blocks (1215) slide in the limiting groove (1216) on the same side.

6. A PCB multilayer circuit board drilling device according to claim 3, characterized in that, A cotton pad (1217) is fixedly installed on the inner circle of the cleaning ring (123), and several brush plates (1218) and scrapers (1219) are fixedly installed on the outer circle of the cleaning ring (123). The brush plates (1218) and scrapers (1219) are arranged alternately.

7. The PCB multilayer circuit board drilling device according to claim 1, characterized in that, The collection cover (7) is connected to a suction pipe (8), which is connected to an external air pump.

8. A drilling device for multilayer PCB circuit boards according to claim 7, characterized in that, Several suction holes (15) are evenly distributed in an array along the circumference of the drill bit (11). The suction holes (15) are conical in shape, and the diameter of the suction holes (15) gradually increases from top to bottom.

9. A drilling device for multilayer PCB circuit boards according to claim 1, characterized in that, The clamping assembly (14) includes an electric turntable (141) disposed in a base (13). The base (13) has a plurality of sliding grooves (142). A connecting column (143) is slidably installed in each sliding groove (142). A hinge rod (144) is hinged to the bottom end of the connecting column (143). The end of the hinge rod (144) away from the connecting column (143) on the same side is hinged to the electric turntable (141). A clamping plate (145) is fixedly installed at the top end of the connecting column (143).

10. A drilling device for multilayer PCB circuit boards according to claim 9, characterized in that, The connecting column (143) has a rectangular cross section, and the sliding groove (142) is a rectangular sliding groove (142). The connecting column (143) slides in the rectangular sliding groove (142) on the same side.

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