Multi-axis linkage drilling platform for circuit board

Abstract

The invention relates to the technical field of circuit manufacturing, in particular to a circuit board multi-axis linkage drilling platform which comprises a workbench and a plurality of drilling assemblies. A circuit board is placed on a supporting plate of the workbench; a base plate is arranged between the circuit board and the supporting plate; the drilling assembly comprises a main shaft, a chuck and a cooling head; a sucker is arranged at the bottom of the cooling head; a plurality of air ducts are arranged on the cylinder wall of the sucker; the air channel is arranged in the tangential direction and conveys air from outside to inside, so that cyclones are formed in the suction cup. After the drill bit penetrates through the circuit board, the drill hole formed in the circuit board, the corresponding second through hole in the base plate and the corresponding first through hole in the supporting plate form an air flow channel, so that air below the supporting plate flows upwards, carries chippings in the drill hole and enters the suction cup, and then is discharged in the radial direction. According to the scheme, gas below the supporting plate flows through the drill hole and the drill bit from bottom to top through negative pressure in the suction cup, the heat dissipation efficiency is improved, and meanwhile the chip removal efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of circuit manufacturing technology, and in particular to a multi-axis linkage drilling platform for circuit boards. Background Technology

[0002] Circuit boards are key components in electronic devices that carry electronic components and enable electrical connections. They are commonly used in various electronic devices such as computers, communication equipment, and consumer electronics, providing a stable mounting platform and reliable electrical pathways for electronic components. Circuit board drilling is a crucial step in the manufacturing process, and its quality directly affects the performance and reliability of the circuit board.

[0003] In existing technologies, to improve drilling accuracy and protect the circuit board surface, upper and lower cover plates are often installed on the circuit board, respectively. However, in actual operation, the drill bit usually does not drill through the lower cover plate simultaneously, resulting in a blind via structure formed by the circuit board, upper cover plate, and lower cover plate. Blind vias have virtually no airflow, leading to extremely low heat dissipation efficiency. During high-speed drilling or continuous processing, the heat generated by friction between the drill bit and the circuit board material is difficult to dissipate effectively, easily causing the drill bit to overheat and anneal, shortening its lifespan. It can also cause deformation or performance degradation of the circuit board material due to localized overheating. Furthermore, the poor ventilation within blind vias prevents the timely removal of debris generated during drilling. Debris accumulation in the hole can not only scratch the hole wall, affecting its quality, but also clog the drill bit's chip removal grooves, further accelerating drill wear, reducing drilling accuracy and efficiency, and impacting the overall manufacturing quality of the circuit board. Summary of the Invention

[0004] One objective of this invention is to improve heat dissipation efficiency during the drilling process of circuit boards.

[0005] Another objective of this invention is to improve the efficiency of removing debris generated during the drilling process of circuit boards.

[0006] Specifically, this invention provides a multi-axis linkage drilling platform for circuit boards, comprising: a worktable and multiple drilling assemblies; the worktable includes a housing and a support plate horizontally disposed inside the housing, on which multiple circuit boards to be drilled are placed, and the support plate is densely covered with first through holes; a pad is disposed between each circuit board and the support plate, and the pad is densely covered with second through holes; the multiple drilling assemblies are disposed on the housing and operate synchronously; the multiple drilling assemblies correspond one-to-one with the multiple circuit boards, and each drilling assembly includes a spindle, a chuck, and a cooling head connected sequentially from top to bottom; the bottom of the cooling head... The unit is equipped with a suction cup, which is cylindrical in shape and has multiple circumferentially evenly distributed air ducts on its cylindrical wall. The air ducts are arranged tangentially and transport gas from the outside to the inside, creating an air vortex inside the suction cup. A rotatable drill bit is installed on the chuck, which passes through the cooling head and the suction cup and can move up and down relative to the cooling head and the suction cup. After the drill bit penetrates the circuit board, the drill hole formed on the circuit board, the corresponding second through hole on the pad, and the corresponding first through hole on the support plate form an airflow channel, causing the gas below the support plate to flow upward and carry the debris in the drill hole into the suction cup before being discharged radially.

[0007] Furthermore, the drill bit is configured to partially extend into the pad after penetrating the circuit board; and the second through hole is angled.

[0008] Furthermore, the bottom of the inner wall of the suction cup is provided with an inclined guide surface.

[0009] Furthermore, the first through-hole is configured for unidirectional gas flow from bottom to top.

[0010] Furthermore, the diameter of the first through hole gradually decreases from top to bottom, and a sealing ball is abutted in the middle section of the first through hole.

[0011] Furthermore, the top of the suction cup is provided with an end wall, and the axis of the end wall is provided with a third through hole for the drill bit to pass through. A sealing ring is provided on the wall of the third through hole.

[0012] Furthermore, the bottom of the cooling head is equipped with multiple interchangeable suction cups, and the diameter of the third through hole on each suction cup is different.

[0013] Furthermore, the bottom of the cooling head is provided with a guide groove, and a movable plate that can move horizontally is provided in the guide groove; the movable plate is provided with multiple fourth through holes, and multiple suction cups are fixed in the multiple fourth through holes one by one; the suction cups move with the movable plate and are opposite or offset from the drill bit.

[0014] Furthermore, the cooling head is cylindrical, and an annular cavity is provided inside the cylindrical wall of the cooling head; the top of the annular cavity is closed, and the bottom is connected to multiple air ducts; an air inlet is provided on the outer wall of the cooling head, which is connected to the annular cavity and is connected to an external air supply pipe.

[0015] Furthermore, the direction of the cyclone formed inside the suction cup is the same as the direction of rotation of the drill bit.

[0016] The beneficial effects of this invention are: This invention relates to a multi-axis linkage drilling platform for circuit boards. A pad with numerous second through holes is positioned beneath the circuit board, and a support plate beneath the pad has numerous first through holes. This allows the drill bit to penetrate the circuit board, connecting the drilled hole on the circuit board with the corresponding second through holes on the pad and the corresponding first through holes on the support plate, forming an airflow channel open to the outside at both ends. Multiple circumferentially distributed, tangentially penetrating air ducts are arranged on the suction cup at the bottom of the cooling head. Gas is injected into the suction cup through these ducts, creating an air vortex inside. Due to the negative pressure at the center of the air vortex, after the drilled hole penetrates the circuit board, the gas below the support plate, under the negative pressure, flows through the first and second through holes and the drilled hole before entering the suction cup. The formation of the airflow channel and the negative pressure of the air vortex allow the gas below the support plate to flow quickly and smoothly from bottom to top through the drilled hole and drill bit, thereby accelerating the removal of heat from the drilled hole and drill bit and improving heat dissipation efficiency. After the gas flows under the support plate into the suction cup, it rotates under the action of the cyclone and flows to the inner edge of the suction cup under the action of centrifugal force. Then it is discharged radially from the gap between the suction cup and the circuit board, thereby removing the debris carried by the airflow through the drilling and the drill bit, improving the chip removal efficiency, ensuring the flatness of the hole wall and the subsequent drilling quality of the drill bit.

[0017] Furthermore, the circuit board multi-axis linkage drilling platform of the present invention, by setting a guide surface at the bottom of the inner wall of the suction cup, makes the airflow and debris in the suction cup flow more smoothly when they are discharged through the bottom of the suction cup, thereby improving the debris discharge efficiency.

[0018] Furthermore, the multi-axis linkage drilling platform for circuit boards of the present invention is provided with a first through hole for unidirectional gas flow from bottom to top. On the one hand, this allows the gas below the support plate to flow upward under the negative pressure of the suction cup for heat dissipation and chip removal. On the other hand, when the airflow carrying debris is radially discharged from between the suction cup and the circuit board, the unidirectional flow of the first through hole can prevent the previously drilled holes from forming a downward flow channel with the pad and support plate, thereby reducing the possibility of the chip removal airflow flowing downward through the already drilled holes, and thus reducing the risk of secondary contamination of the drill holes. Attached Figure Description

[0019] The following sections will describe some specific embodiments of the invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. In the drawings: Figure 1 This is a schematic diagram of the structure of a circuit board multi-axis linkage drilling platform according to an embodiment of the present invention; Figure 2 yes Figure 1 A schematic enlarged view of region A in the middle; Figure 3 This is a schematic diagram of the structure of a cooling head and a suction cup according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the cooling head and suction cup from another angle according to an embodiment of the present invention; Figure 5 This is a partial cross-sectional schematic diagram of a circuit board multi-axis linkage drilling platform according to an embodiment of the present invention; Figure 6 yes Figure 5 A schematic enlarged view of region B in the middle; Figure 7 This is a schematic diagram of the structure of a suction cup according to an embodiment of the present invention; Figure 8 This is a cross-sectional schematic diagram of a suction cup according to an embodiment of the present invention.

[0020] in: 10. Circuit board; 11. Upper cover plate; 12. Lower cover plate; 100. Worktable; 110. Housing; 120. Support plate; 121. First through hole; 122. Sealing ball; 130. Pad plate; 131. Second through hole; 200. Drilling assembly; 210. Spindle; 220. Chuck; 221. Drill bit; 230. Cooling head; 231. Guide groove; 232. Moving plate; 2321. Fourth through hole; 2322. Tool change hole; 233. Annular cavity; 234. Air inlet; 235. Air supply pipe; 240. Suction cup; 241. Air duct; 242. Guide surface; 243. Third through hole; 244. Sealing ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0022] The terms "first," "second," "third," and "fourth" used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically stated, this indicates that other features are not excluded and may be further included.

[0023] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0025] The following reference Figures 1 to 8 This invention describes a 10-axis multi-axis linkage drilling platform for circuit boards.

[0026] This embodiment provides a 10-axis multi-axis linkage drilling platform for circuit boards. The 10-axis multi-axis linkage drilling platform for circuit boards generally includes: a worktable 100 and multiple drilling assemblies 200.

[0027] The workbench 100 includes a housing 110 and a support plate 120 horizontally disposed inside the housing 110. Multiple circuit boards 10 to be drilled are placed on the support plate 120, and the support plate 120 is densely covered with first through holes 121. A pad 130 is disposed between each circuit board 10 and the support plate 120, and the pad 130 is densely covered with second through holes 131. Multiple drilling assemblies 200 are disposed on the housing 110 and operate synchronously. Each drilling assembly 200 corresponds one-to-one with a circuit board 10, and each drilling assembly 200 includes a spindle 210, a chuck 220, and a cooling head 230 connected sequentially from top to bottom. A suction cup 240 is disposed at the bottom of the cooling head 230. The suction cup 240 is cylindrical, and multiple circumferentially evenly distributed air ducts 241 are disposed on the cylindrical wall of the suction cup 240. The air duct 241 is arranged tangentially and delivers gas from the outside to the inside, creating an air vortex inside the suction cup 240. A rotatable drill bit 221 is mounted on the chuck 220. The drill bit 221 passes through the cooling head 230 and the suction cup 240 and can move up and down relative to them. After the drill bit 221 penetrates the circuit board 10, the drill hole formed on the circuit board 10, the corresponding second through hole 131 on the pad 130, and the corresponding first through hole 121 on the support plate 120 form an airflow channel. This allows the gas below the support plate 120 to flow upwards, carrying debris from the drill hole into the suction cup 240 before being discharged radially.

[0028] like Figure 1 As shown, the drilling assembly 200 is located above the support plate 120. The drilling assembly 200 can move up and down and left and right relative to the housing 110, while the support plate 120 can move back and forth relative to the housing 110, thereby adjusting the drilling position of the drill bit 221 on the circuit board 10. The spindle 210 is movably mounted on the housing 110, and the chuck 220 and cooling head 230 are connected in sequence below the spindle 210. The chuck 220 is equipped with a drive mechanism that drives the drill bit 221 to rotate, and the chuck 220 drives the rotating drill bit 221 to move up and down relative to the cooling head 230, thereby drilling the circuit board 10. The support plate 120 is equipped with a limiting mechanism (not shown in the figure) that positions and clamps the circuit board 10 to ensure that the circuit board 10 does not skew during the drilling process. The multi-axis linkage of multiple drilling assemblies 200 allows multiple circuit boards 10 to be operated simultaneously, improving production efficiency.

[0029] In this embodiment, a pad 130 with numerous second through holes 131 is provided below the circuit board 10, and a support plate 120 below the pad 130 has numerous first through holes 121. This allows the drill bit 221 to penetrate the circuit board 10, connecting the drilled hole on the circuit board 10 with the corresponding second through holes 131 on the pad 130 and the corresponding first through holes 121 on the support plate 120, forming an airflow channel with both ends connected to the outside. Multiple circumferentially distributed, tangentially penetrating air ducts 241 are provided on the suction cup 240 at the bottom of the cooling head 230, and gas is injected into the suction cup 240 through the air ducts 241, creating an air vortex inside the suction cup 240. Due to the negative pressure at the center of the air vortex, after the drilled hole on the circuit board 10 is penetrated, the gas below the support plate 120, under the negative pressure, passes through the first through holes 121, the second through holes 131, and the drilled hole, flowing into the suction cup 240. The formation of the airflow channel and the negative pressure effect of the cyclone allow the gas below the support plate 120 to flow quickly and smoothly from bottom to top through the borehole, thereby accelerating the removal of heat from the borehole and improving heat dissipation efficiency. After the gas below the support plate 120 flows into the suction cup 240, it rotates under the action of the cyclone and flows to the inner edge of the suction cup 240 (i.e., the inner sidewall of the suction cup 240) under the action of centrifugal force, and then is discharged radially from the gap between the suction cup 240 and the circuit board 10. During the airflow discharge process, it flows through the drill bit 221, thereby improving the heat dissipation effect on the drill bit 221, reducing the risk of overheating of the drill bit 221, and ensuring the subsequent drilling quality.

[0030] Furthermore, as the airflow below the support plate 120 flows upward through the drill hole, it can also carry away debris from the hole, thereby improving the flatness of the hole wall and enhancing the overall manufacturing quality of the circuit board 10. When the airflow flows through the drill bit 221, it can also remove residual debris from the spiral groove of the drill bit 221, preventing debris from clogging the spiral groove of the drill bit 221 and affecting the subsequent drilling quality.

[0031] In some embodiments, the second through hole 131 can be configured as a hexagonal hole, and the pad 130 is generally honeycomb-shaped, making the arrangement of the second through holes 131 more compact, ensuring that when drilling at any position on the circuit board 10, the drilled hole can connect with a second through hole 131. The pad 130 can be used once.

[0032] like Figure 5 As shown, in some embodiments, an upper cover plate 11 and a lower cover plate 12 are respectively provided on the upper and lower sides of the circuit board 10. A pad plate 130 is disposed between the lower cover plate 12 and the support plate 120, thereby preventing burrs from being generated on the circuit board 10 and improving drilling accuracy and hole wall quality.

[0033] The drill bit 221 is configured to partially extend into the pad 130 after penetrating the circuit board 10. The second through hole 131 is also angled.

[0034] In this embodiment, the drill bit 221 is configured to partially extend into the pad 130, thereby ensuring that both ends of the drill hole on the circuit board 10 are through. The second through hole 131 is inclined so that after the drill bit 221 partially extends into the pad 130, it can penetrate part of the hole wall of the second through hole 131, ensuring that at least one second through hole 131 communicating with the drill hole can communicate with one first through hole 121, ensuring unobstructed airflow under the support plate 120 through the support plate 120, the pad 130, and the circuit board 10.

[0035] The bottom of the inner wall of the suction cup 240 is provided with an inclined guide surface 242.

[0036] In this embodiment, by providing a guide surface 242 at the bottom of the inner wall of the suction cup 240, the airflow and debris inside the suction cup 240 flow more smoothly when they are discharged through the bottom of the suction cup 240, thereby improving the debris discharge efficiency.

[0037] The first through-hole 121 is configured to allow unidirectional gas flow from bottom to top.

[0038] In this embodiment, the first through hole 121 allows for unidirectional gas flow from bottom to top. On the one hand, this allows the gas below the support plate 120 to flow upward under the negative pressure of the suction cup 240, thus dissipating heat and removing debris. On the other hand, it prevents debris from falling below the support plate 120 through the first through hole 121, thus preventing debris from entering the workbench 100 and causing safety hazards or increasing cleaning and maintenance costs.

[0039] When the airflow carrying debris is radially discharged between the suction cup 240 and the circuit board 10, the unidirectional flow of the first through hole 121 can prevent the previously drilled hole from forming a downward flow channel with the pad 130 and the support plate 120, thereby reducing the possibility of the airflow carrying debris flowing downward through the already drilled hole, and thus reducing the risk of secondary contamination of the drill hole.

[0040] In order to achieve unidirectional flow in the first through hole 121, in some embodiments, the diameter of the first through hole 121 gradually decreases from top to bottom, and the middle section of the first through hole 121 is abutted by a sealing ball 122.

[0041] like Figure 5 As shown, the cross-section of the first through hole 121 is tapered, wider at the top and narrower at the bottom. The horizontal cross-section of the first through hole 121 is circular, and the sealing ball 122 is a spherical shape adapted to the size of the middle section of the first through hole 121 to ensure the sealing effect. The sealing ball 122 is made of lightweight material to ensure that the air below the support plate 120 can be smoothly pushed upward by the negative pressure of the suction cup 240, allowing the gas in the first through hole 121 to circulate.

[0042] In this embodiment, the diameter of the first through hole 121 is set to gradually decrease from top to bottom. The unidirectional airflow is achieved by the contact between the sealing ball 122 and the middle section of the first through hole 121. This design is not only simple and reliable but also low in cost and easy to maintain. When the airflow flows from top to bottom, the contact between the sealing ball 122 and the first through hole 121 becomes tighter under the action of the airflow, ensuring the sealing effect of the first through hole 121. When the airflow flows from bottom to top, it pushes the ground ball upward, allowing the second through hole 131 to pass through, thus achieving unidirectional airflow through the first through hole 121.

[0043] To achieve unidirectional flow through the first through-hole 121, in some embodiments, a rotatable flap may be provided inside the first through-hole 121. The shape and size of the flap are adapted to the shape and size of the middle section of the first through-hole 121. The side of the flap is hinged to the cylindrical wall of the first through-hole 121. A limiting block is also provided on the cylindrical wall of the first through-hole 121, which abuts against the bottom surface of the flap, so that the flap can only be rotated by the upward airflow, opening the first through-hole 121. The flap remains in contact with the limiting block under the downward airflow, closing the first through-hole 121.

[0044] The suction cup 240 has an end wall at its top, and a third through hole 243 for the drill bit 221 to pass through is provided at the axis of the end wall. A sealing ring 244 is provided on the wall of the third through hole 243.

[0045] In this embodiment, a third through hole 243 is provided at the axial center of the end wall at the top of the suction cup 240, and a sealing ring 244 is provided on the wall of the third through hole 243. When the drill bit 221 passes through the third through hole 243, it contacts the sealing ring 244. This improves the sealing effect at the top of the suction cup 240 and the coaxiality of the drill bit 221 and the suction cup 240. This makes the drill bit 221 located at the center of the strongest negative pressure in the negative pressure area of ​​the suction cup 240, increasing the speed of airflow through the drill bit 221, thereby improving the cooling efficiency of the drill bit 221 and reducing the risk of overheating.

[0046] The bottom of the cooling head 230 is provided with multiple interchangeable suction cups 240, and the diameter of the third through hole 243 on each suction cup 240 is different.

[0047] In this embodiment, by setting multiple interchangeable suction cups 240 at the bottom of the cooling system, and by having different diameters of the third through holes 243 on each suction cup 240, the drilling assembly 200 can drill a wider range of diameters and improve its practicality by corresponding to different drill bit 221 sizes.

[0048] To make the multiple suction cups 240 on the cooling head 230 interchangeable, in some embodiments, a guide groove 231 is provided at the bottom end of the cooling head 230, and a movable plate 232 that can move horizontally is provided in the guide groove 231. The movable plate 232 is provided with multiple fourth through holes 2321, and the multiple suction cups 240 are fixed one-to-one within the multiple fourth through holes 2321. As the movable plate 232 moves, the suction cups 240 are opposite to or offset from the drill bit 221.

[0049] In this embodiment, a groove is provided at the bottom of the cooling head 230, and a movable plate 232 is placed in the groove. The suction cup 240 is fixed in the fourth through hole 2321 of the movable plate 232. When the movable plate 232 moves in the groove, the suction cup 240 moves with the movable plate 232, and is opposite or offset from the drill bit 221, thereby realizing the replacement of the suction cup 240. It is not only simple in structure and stable in operation, but also low in cost and easy to maintain.

[0050] like Figure 4As shown, in some embodiments, the movable plate 232 is also provided with a tool changing hole 2322 to facilitate the replacement of drill bits 221 of different sizes. When the drill bit 221 needs to be replaced, the chuck 220 moves the drill bit 221 upward, so that the bottom end of the drill bit 221 is higher than the top surface of the movable plate 232. Then the movable plate 232 moves so that the tool changing hole 2322 and the drill bit 221 are facing each other. After the drilling assembly 200 moves to be opposite the tool changing assembly, the chuck 220 moves the drill bit 221 downward, and the tool changing assembly removes the drill bit 221 from the chuck 220 and replaces it with a drill bit 221 of another size. Afterward, the chuck 220 moves the drill bit 221 upward, so that the bottom end of the drill bit 221 is higher than the top surface of the movable plate 232, and the movable plate 232 moves again so that the drill bit 221 and its corresponding suction cup 240 are facing each other. Finally, the chuck 220 moves the drill bit 221 downward, causing the drill bit 221 to pass through the third through hole 243 on the corresponding suction cup 240.

[0051] In some embodiments, a baffle may be provided at one end of the slide groove, and a telescopic mechanism may be provided on the side of the movable plate 232 opposite to the baffle. One end of the telescopic mechanism is connected to the movable plate 232, and the other end is connected to the baffle. When the telescopic mechanism extends or retracts, it pulls the movable plate 232 to move back and forth. In other embodiments, a baffle may be provided at one end of the slide groove, and a motor and a ball screw driven by the motor are provided on the baffle. The ball screw passes through the movable plate 232 and is threadedly connected to the movable plate 232. The motor drives the ball screw to rotate forward and backward, causing the movable plate 232 to move back and forth.

[0052] To make the multiple suction cups 240 on the cooling head 230 interchangeable, in some embodiments, a rotatable turntable can be provided at the bottom of the cooling head 230. The multiple suction cups 240 are evenly arranged circumferentially on the turntable and remain relatively fixed to it. When the turntable rotates around its own axis, the movement path of the suction cups 240 passes through the axis of the drill bit 221. Switching of the suction cups 240 is achieved by controlling the rotation of the turntable.

[0053] The cooling head 230 is cylindrical, and an annular cavity 233 is provided inside the cylindrical wall of the cooling head 230. The top of the annular cavity 233 is closed, and the bottom is connected to multiple air ducts 241. An air inlet 234 is provided on the outer wall of the cooling head 230, which is connected to the annular cavity 233 and is externally connected to an air supply pipe 235.

[0054] like Figure 6 As shown, the bottom end of the suction cup 240 protrudes radially outward and is tightly connected to the wall of the fourth through hole 2321 on the moving plate 232. The fourth through hole 2321 is opposite to the annular cavity 233 of the cooling head 230. The airflow in the annular cavity 233 enters the fourth through hole 2321 and flows into the suction cup 240 along the air duct 241.

[0055] In this embodiment, an annular cavity 233 is provided inside the cylindrical wall of the cooling head 230, and the bottom end of the annular cavity 233 is connected to multiple air ducts 241 on the suction cup 240, so that multiple air ducts 241 simultaneously send airflow into the suction cup 240, thereby forming a powerful cyclone inside the suction cup 240.

[0056] The preferred method of supplying low-temperature air into the air supply duct 235 is not only cost-effective and readily available, but also further improves the cooling effect on the drill bit 221.

[0057] The direction of the cyclone formed inside the suction cup 240 is the same as the rotation direction of the drill bit 221.

[0058] In this embodiment, the rotation of the drill bit 221 causes the gas inside the suction cup 240 to rotate. The rotation direction of the drill bit 221 is set to be the same as the direction of the air cyclone inside the suction cup 240, thereby strengthening the negative pressure effect of the air cyclone inside the suction cup 240 by utilizing the rotation of the drill bit 221, thus improving heat dissipation efficiency and chip removal efficiency.

[0059] The specific working process of the 10-axis linkage drilling platform for circuit boards provided by the present invention will be described in conjunction with the above embodiments: First, place the circuit board 10 on the support plate 120, and place a pad 130 between the support plate 120 and the circuit board 10. Then, use a limiting mechanism to limit the circuit board 10 to prevent it from shifting during drilling and affecting the drilling effect.

[0060] The drilling assembly 200 is moved left and right, and the support plate 120 is moved back and forth, so that the drill bit 221 of the drilling assembly 200 is aligned with the position of the hole to be drilled. The drilling assembly 200 is moved up and down, so that there is a certain gap between the suction cup 240 and the surface of the circuit board 10, and a low-temperature airflow is delivered to the annular cavity 233 of the cooling head 230 through the air supply pipe 235. The low-temperature airflow flows downward to the fourth through hole 2321 on the moving plate 232, and then flows into the interior of the suction cup 240 through the air duct 241 on the suction cup 240, forming an air vortex inside the suction cup 240.

[0061] The drill bit 221 is controlled to rotate and move downward to drill a hole in the circuit board 10. After penetrating the circuit board 10, the drill bit 221 continues to extend a certain distance into the pad 130 before moving upward to disengage from the hole. The relative position between the drilling assembly 200 and the circuit board 10 is then adjusted to continue drilling until all drilling operations are completed.

[0062] After the circuit board 10 is penetrated by the drill bit 221, the drill hole on the circuit board 10 and the corresponding second through hole 131 on the pad 130 and the corresponding first through hole 121 on the support plate 120 form a through airflow channel. Under the negative pressure of the cyclone inside the suction cup 240, the air below the support plate 120 flows through the first through hole 121, the second through hole 131 and the drill hole, enters the suction cup 240 and is then radially discharged from the gap between the suction cup 240 and the circuit board 10. As the airflow flows upward through the drill hole and the drill bit 221, it cools the drill hole and the drill bit 221 and carries away the debris on the drill hole and the drill bit 221.

[0063] Furthermore, during the entire drilling process of the circuit board 10, different sizes of drill bits 221 and suction cups 240 corresponding to the size of drill bits 221 can be replaced according to the required hole diameter.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A multi-axis linkage drilling platform for circuit boards, characterized in that, include: The workbench includes a housing and a support plate horizontally disposed inside the housing. Multiple circuit boards to be drilled are placed on the support plate, and the support plate is densely covered with first through holes. A pad is disposed between each circuit board and the support plate, and the pad is densely covered with second through holes. Multiple drilling assemblies are mounted on the housing and operate synchronously; each drilling assembly corresponds to one of the multiple circuit boards, and each drilling assembly includes a spindle, a chuck, and a cooling head connected sequentially from top to bottom; The bottom of the cooling head is provided with a suction cup, which is cylindrical, and the cylindrical wall of the suction cup is provided with multiple air channels evenly distributed along the circumference; the air channels are arranged in the tangential direction and transport gas from the outside to the inside, so that an air vortex is formed inside the suction cup. The chuck is equipped with a rotatable drill bit that passes through the cooling head and the suction cup and can move up and down relative to the cooling head and the suction cup. After the drill bit penetrates the circuit board, the drill hole formed on the circuit board, the corresponding second through hole on the pad, and the corresponding first through hole on the support plate form an airflow channel, causing the gas below the support plate to flow upward and carry the debris in the drill hole into the suction cup and then discharge radially.

2. The circuit board multi-axis linkage drilling platform according to claim 1, characterized in that, The drill bit is configured to partially extend into the pad after penetrating the circuit board; and the second through hole is inclined.

3. The circuit board multi-axis linkage drilling platform according to claim 1, characterized in that, The bottom of the inner wall of the suction cup is provided with an inclined guide surface.

4. The circuit board multi-axis linkage drilling platform according to claim 1, characterized in that, The first through-hole is configured to allow unidirectional gas flow from bottom to top.

5. The circuit board multi-axis linkage drilling platform according to claim 4, characterized in that, The diameter of the first through hole gradually decreases from top to bottom, and a sealing ball is abutted in the middle section of the first through hole.

6. The circuit board multi-axis linkage drilling platform according to claim 1, characterized in that, The suction cup has an end wall at its top, and a third through hole for the drill bit to pass through is provided at the center of the end wall. A sealing ring is provided on the wall of the third through hole.

7. The circuit board multi-axis linkage drilling platform according to claim 6, characterized in that, The bottom end of the cooling head is provided with multiple interchangeable suction cups, and the diameter of the third through hole on each suction cup is different.

8. The circuit board multi-axis linkage drilling platform according to claim 7, characterized in that, The bottom end of the cooling head is provided with a guide groove, and a movable plate that can move horizontally is provided in the guide groove; the movable plate is provided with a plurality of fourth through holes, and a plurality of suction cups are fixed in the plurality of fourth through holes one by one; the suction cups move with the movable plate and are opposite to or offset from the drill bit.

9. The circuit board multi-axis linkage drilling platform according to claim 1, characterized in that, The cooling head is cylindrical, and an annular cavity is provided inside the cylindrical wall of the cooling head; the top of the annular cavity is closed, and the bottom is connected to multiple air ducts; an air inlet is provided on the outer wall of the cooling head, the air inlet is connected to the annular cavity, and an air supply pipe is connected to it.

10. The circuit board multi-axis linkage drilling platform according to claim 1, characterized in that, The direction of the cyclone formed within the suction cup is the same as the rotation direction of the drill bit.

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