A drilling device for HDI circuit board processing

Abstract

This invention relates to a drilling device for HDI circuit board processing, comprising a tripod, a drilling unit, and a cooling unit; the drilling unit for drilling holes in the circuit board is connected between two tripods; the drilling unit is connected to a cooling unit for air cooling of the drilling position and the drill bit. This invention achieves stable fixing of the circuit board by positioning it and then cooperating with a placement platform and a push plate. Furthermore, by setting up two sets of drill bits, it enables simultaneous drilling of double-sided blind holes in the circuit board without flipping the board. Air is extracted from the protective cover through a first conduit to cool the drill bit and the circuit board, and also to remove flying dust and debris. A dust suction head covers the blind holes, and then the dust and debris inside the blind holes are extracted, reducing the residue of dust and debris within the blind holes.

Description

Technical Field

[0001] This invention relates to the field of HDI circuit boards, and more particularly to a drilling apparatus for HDI circuit board processing. Background Technology

[0002] High-density interconnect (HDI) manufacturing is one of the fastest-growing areas in the printed circuit board industry. HDI circuit boards are a type of circuit board with a high line distribution density that uses micro-blind vias and buried vias.

[0003] Traditional PCB manufacturing, due to its relatively low precision requirements for drilling, has relatively simple drilling equipment structures that can meet production needs. However, with the rapid development of the PCB industry, the requirements for PCB processing precision have also increased. This includes drilling through holes, blind holes, and stacked holes in PCBs. This increased processing intensity means that if the PCB is not securely fixed, the high-frequency vibrations generated during drilling can cause displacement of the PCB, severely affecting drilling accuracy and even causing irreversible damage to the PCB and drill bit. Furthermore, when drilling blind holes, the PCB's directional nature means that the flipping process can easily wear down or even block the drilled blind holes. Additionally, debris and dust generated during blind hole drilling can easily accumulate inside the blind holes, affecting the monitoring of drilling depth and resulting in poor PCB processing quality. Summary of the Invention

[0004] The technical problem of this invention is:

[0005] To overcome the drawbacks of unstable circuit board fixing, high-frequency vibrations during drilling causing displacement of the circuit board, the easy wear and even blockage of drilled blind holes during the circuit board flipping process, and the easy accumulation of debris and dust in the blind holes during drilling, this invention provides a drilling device for HDI circuit board processing.

[0006] To solve the above-mentioned technical problems, the technical implementation scheme adopted by the present invention is as follows:

[0007] A drilling device for HDI circuit board processing includes a frame, a gantry frame, a tripod frame, a first electric slide rail, a first electric slider, and contact blocks. A gantry frame is fixedly connected to the left and right sides of the frame; a tripod frame is fixedly connected to the front and rear of the frame; two first electric slide rails are installed between the two gantry frames; two first electric sliders are slidably connected to each of the two first electric slide rails; two contact blocks are fixedly connected to the right gantry frame; the device also includes a fixing unit, a locking unit, a drilling unit, a cooling unit, and a hole cleaning unit. The unit includes a dust removal unit; two front and two rear electric sliders are connected to a fixing unit for positioning and fixing the circuit board; the fixing unit is connected to a locking unit; the fixing unit is in contact with two contact blocks; a drilling unit for drilling holes in the circuit board is connected between the two tripods; a cooling unit for air cooling the drilling position and drill bit is connected to the drilling unit; a hole cleaning unit for sucking up residual dust and debris in the hole is connected to the cooling unit; and a dust removal unit for cleaning the dust and debris extracted during cooling and hole cleaning is connected to the cooling unit.

[0008] Optionally, the fixing unit includes a placement platform, a first elastic telescopic rod, a guide rod, a connecting plate, a push plate, and rollers; the placement platform is fixedly connected to four first electric sliders; the placement platform is connected to the locking unit; the placement platform is "C"-shaped with its opening facing right; a corner mark for positioning the circuit board placement direction is provided on the left side of the placement platform; a slide is provided at the front and rear of the placement platform; two first elastic telescopic rods are fixedly connected to the right side of the upper surface of the placement platform; a connecting plate is fixedly connected to the telescopic part of each of the two first elastic telescopic rods; the two connecting plates are connected to the locking unit; a guide rod is fixedly connected to the opposite side of each of the two connecting plates; both guide rods are slidably connected to the placement platform; a push plate is fixedly connected between the two connecting plates; the position of the push plate is higher than the slide; a row of rollers for reducing friction during circuit board placement is rotatably connected to the upper part of the push plate; the right side of the push plate is in contact with two contact blocks.

[0009] Optionally, the locking unit includes a first rack, elastic elements, connecting rods, sliding rods, and a second rack; a first rack is fixedly connected to the front right and rear right of the placement platform; two elastic elements are fixedly connected to the upper surface of each of the two connecting plates; a connecting rod is fixedly connected to two adjacent elastic elements; two sliding rods are fixedly connected to the lower part of each of the two connecting rods; each pair of sliding rods is slidably connected to a connecting plate; a second rack is fixedly connected to the lower part of each pair of sliding rods; each second rack is in contact with a first rack.

[0010] Optionally, the drilling unit includes a mounting bracket, a second electric slide rail, a second electric slider, an electric actuator, a drill bit, and a drill bit; the mounting bracket is fixedly connected between the two tripods; a second electric slide rail is mounted on the upper and lower parts of the mounting bracket; a second electric slider is slidably connected to each of the two second electric slide rails; an electric actuator is fixedly connected to each of the two second electric sliders; a drill bit is fixedly connected to the telescopic part of each of the two electric actuators; the two drill bits are connected to the cooling unit; a drill bit is detachably connected to each of the two drill bits; and the two drill bits are connected to the cooling unit.

[0011] Optionally, the cooling unit includes a second elastic telescopic rod, a first conduit, a protective cover, and a dust discharge pipe; a second elastic telescopic rod is fixedly connected between each of the two drill bits; a first conduit is fixedly connected to each of the two second elastic telescopic rods via a connecting block; both first conduits are connected to a dust removal unit; the first conduits are connected to a hole cleaning unit; a protective cover is fixedly connected to the right side of each of the two first conduits; the two protective covers are connected to a hole cleaning unit; the openings of the two protective covers face opposite sides; each of the two protective covers is slidably connected to a drill bit; a dust discharge pipe is connected to the left side of each of the two first conduits; both dust discharge pipes are connected to the dust removal unit.

[0012] Optionally, the cleaning unit includes a fixed plate, an annular tube, a suction head, and a second guide tube; a fixed plate is fixedly connected to the right side of each of the two protective covers; an annular tube is fixedly connected to each of the two fixed plates; a ring of suction heads is connected to the opposite sides of each of the two annular tubes; a second guide tube is connected to the front and rear of each of the two annular tubes; the left sides of two adjacent second guide tubes are connected to the first guide tube.

[0013] Optionally, the dust removal unit includes a dust filter element, support plates, a rotating shaft, a shaped paddle, a connecting rope, a first guide rod, a second guide rod, a sealing component, and a constriction component; a dust filter element is installed on the left side of each of the two first guide pipes; two support plates are fixedly connected to the left side of the inner surface of each of the two first guide pipes; the dust filter element is located between the two support plates and above the ash discharge pipe; a rotating shaft is rotatably connected between every two support plates; each of the two rotating shafts is rotatably connected to a dust filter element; a shaped paddle is fixedly connected to each of the two rotating shafts; the left side of each of the two shaped paddles contacts a dust filter element; and the two rotating shafts... Each pipe has a connecting rope; a first guide rod is fixed to the right side of the inner surface of each of the two ash discharge pipes; a constriction piece is fixed to the inner surface of each of the two ash discharge pipes; the position of each constriction piece inside the ash discharge pipe is lower than the first guide rod; a second guide rod is fixed to the upper part of each of the two constriction pieces; each second guide rod is located to the left of a first guide rod; the connecting rope is connected to the first guide rod and the second guide rod in sequence; a sealing piece is fixed to the lower end of each of the two connecting ropes; the lower part of each of the two constriction pieces contacts and engages with a sealing piece; the upper part of the sealing piece is conical, and a counterweight is provided at the lower part of the sealing piece.

[0014] Optionally, a rubber protective layer is provided at the edge of the opening of the protective cover.

[0015] Optionally, the dust filter element is a dust filter screen.

[0016] Optionally, the left side of the irregularly shaped propeller is provided with bristles, and the blades of the irregularly shaped propeller are twisted.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The circuit board is positioned by positioning the positioning angle and the corner mark on the same side of the placement platform. Then, the placement platform and the push plate cooperate, and the push plate contacts the right side of the circuit board on the two slides. The push plate pushes the circuit board to the left, so that the left end of the circuit board is in close contact with the placement platform. Then, the locking unit clamps the circuit boards of different widths to achieve stable fixation of the circuit board.

[0019] 2. By setting up two sets of drill bits, both upper and lower, it is possible to simultaneously drill blind holes on both sides of the circuit board without flipping the board. This effectively avoids the blind holes on the circuit board being worn down during the flipping process, thus reducing the quality of the drilling.

[0020] 3. The air inside the protective cover is extracted through the first conduit to cool the drill bit and circuit board. It can also extract the flying dust and debris. The blind hole is covered by the dust suction head, and the dust and debris inside the blind hole are extracted to reduce the residue of dust and debris inside the blind hole. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the drilling device for HDI circuit board processing according to the present invention;

[0022] Figure 2 This is a front view of the drilling apparatus for HDI circuit board processing according to the present invention;

[0023] Figure 3 This is a three-dimensional schematic diagram of a first combination of the drilling device for HDI circuit board processing according to the present invention.

[0024] Figure 4 This is a three-dimensional structural diagram of the fixing unit of the drilling device for HDI circuit board processing according to the present invention;

[0025] Figure 5 This is a three-dimensional structural diagram of the locking unit of the drilling device for HDI circuit board processing according to the present invention;

[0026] Figure 6 This is a schematic diagram of a second combined three-dimensional structure of the drilling device for HDI circuit board processing according to the present invention.

[0027] Figure 7This is a schematic diagram of a third combination of the drilling device for HDI circuit board processing according to the present invention.

[0028] Figure 8 This is a schematic diagram of a fourth combination of the drilling device for HDI circuit board processing according to the present invention.

[0029] Figure 9 This is a three-dimensional structural diagram of the dust removal unit of the drilling device for HDI circuit board processing according to the present invention.

[0030] The components in the attached diagram are labeled as follows:

[0031] 1-Frame, 2-Gantry frame, 3-Triangle frame, 4-First electric slide rail, 5-First electric slider, 6-Contact block;

[0032] 101-Placement platform, 102-First elastic telescopic rod, 103-Guide rod, 104-Connecting plate, 105-Push plate, 106-Roller, 10101-Corner mark, 10102-Slide table, 201-First rack, 202-Elastic element, 203-Connecting rod, 204-Slide rod, 205-Second rack, 301-Mounting bracket, 302-Second electric slide rail, 303-Second electric slider, 304-Electric actuator, 305- Drilling tool, 306-Drill bit, 401-Second elastic telescopic rod, 402-First guide tube, 403-Protective cover, 404-Ash discharge pipe, 501-Fixing plate, 502-Annular pipe, 503-Dust suction head, 504-Second guide tube, 601-Dust filter, 602-Support plate, 603-Rotating shaft, 604-Irregularly shaped paddle, 605-Connecting rope, 606-First guide rod, 607-Second guide rod, 608-Sealing component, 609-Narrowing component. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the directional terms such as up, down, left, right, front, back, inside, and outside used in this text are based solely on the accompanying drawings and are not intended to specifically limit the invention.

[0034] Specific Implementation Method 1

[0035] A drilling device for HDI circuit board processing, according to Figure 1-2As shown, it includes a frame 1, a portal frame 2, a triangular frame 3, a first electric slide rail 4, a first electric slider 5, and contact blocks 6; a portal frame 2 is welded to the left and right sides of the frame 1; a triangular frame 3 is welded to the front and rear of the frame 1; two first electric slide rails 4 are installed between the two portal frames 2; two first electric sliders 5 are slidably connected to the two first electric slide rails 4; two contact blocks 6 are bolted to the right portal frame 2;

[0036] It also includes a fixing unit, a locking unit, a drilling unit, a cooling unit, a hole cleaning unit, and a dust removal unit; the two front first electric sliders 5 and the two rear first electric sliders 5 are connected to the fixing unit; the fixing unit is connected to the locking unit; the fixing unit is in contact with the two contact blocks 6; the two tripods 3 are connected to the drilling unit; the drilling unit is connected to the cooling unit; the cooling unit is connected to the hole cleaning unit; the cooling unit is connected to the dust removal unit.

[0037] Second specific implementation method

[0038] Based on the first specific implementation method, according to Figure 1 and Figure 3-4 As shown, the fixing unit includes a placement platform 101, a first elastic telescopic rod 102, a guide rod 103, a connecting plate 104, a push plate 105, and a roller 106; the placement platform 101 is fixedly connected to four first electric sliders 5; the placement platform 101 is connected to the locking unit; the placement platform 101 is C-shaped with its opening facing right; a corner mark 10101 is provided on the left side of the placement platform 101; a slide table 10102 is provided at the front and rear of the placement platform 101; two first elastic telescopic rods are fixedly connected to the right side of the upper surface of the placement platform 101. The telescopic rods 102 are each fixedly connected to a connecting plate 104 at their telescopic portions; the two connecting plates 104 are connected to the locking unit; a guide rod 103 is welded to each of the opposite sides of the two connecting plates 104; both guide rods 103 are slidably connected to the placement platform 101; a push plate 105 is welded between the two connecting plates 104; the position of the push plate 105 is higher than that of the slide table 10102; a row of rollers 106 is rotatably connected to the upper part of the push plate 105; the right side of the push plate 105 is in contact with two contact blocks 6.

[0039] The locking unit includes a first rack 201, an elastic element 202, a connecting rod 203, a sliding rod 204, and a second rack 205. A first rack 201 is welded to the front right and rear right sides of the placement platform 101. Two elastic elements 202 are fixedly connected to the upper surfaces of the two connecting plates 104. The elastic elements 202 are springs. A connecting rod 203 is fixedly connected to two adjacent elastic elements 202. Two sliding rods 204 are welded to the lower parts of the two connecting rods 203. Each pair of sliding rods 204 is slidably connected to a connecting plate 104. A second rack 205 is welded to the lower parts of each pair of sliding rods 204. Each second rack 205 contacts and engages with a first rack 201.

[0040] The drilling unit includes a mounting bracket 301, a second electric slide rail 302, a second electric slider 303, an electric actuator 304, a drill bit 305, and a drill bit 306. The mounting bracket 301 is welded between the two tripods 3. A second electric slide rail 302 is mounted on the upper and lower parts of the mounting bracket 301. A second electric slider 303 is slidably connected to each of the two second electric slide rails 302. An electric actuator 304 is fixedly connected to each of the two second electric sliders 303. A drill bit 305 is fixedly connected to the telescopic part of each of the two electric actuators 304. The two drill bits 305 are connected to the cooling unit. A drill bit 306 is detachably connected to each of the two drill bits 305. The two drill bits 306 are connected to the cooling unit.

[0041] The cooling unit includes a second elastic telescopic rod 401, a first conduit 402, a protective cover 403, and a dust discharge pipe 404; a second elastic telescopic rod 401 is fixedly connected between each of the two drill bits 305; a first conduit 402 is fixedly connected to each of the two second elastic telescopic rods 401 through a connecting block; both first conduits 402 are connected to the dust removal unit; the first conduits 402 are connected to the hole cleaning unit; a protective cover 403 is fixedly connected to the right side of each of the two first conduits 402; the two protective covers 403 are connected to the hole cleaning unit; the openings of the two protective covers 403 face opposite sides; each of the two protective covers 403 is slidably connected to a drill bit 306; a dust discharge pipe 404 is connected to the left side of each of the two first conduits 402; both dust discharge pipes 404 are connected to the dust removal unit.

[0042] The edge of the opening of the protective cover 403 is provided with a rubber protective layer to buffer the vibration between the protective cover 403 and the circuit board during drilling.

[0043] The hole cleaning unit includes a fixing plate 501, an annular tube 502, a dust suction head 503, and a second conduit 504; a fixing plate 501 is welded to the right side of each of the two protective covers 403; an annular tube 502 is fixedly connected to each of the two fixing plates 501; a ring of several dust suction heads 503 are connected to the opposite sides of the two annular tubes 502; a second conduit 504 is connected to the front and rear of each of the two annular tubes 502; the left sides of two adjacent second conduits 504 are connected to the first conduit 402.

[0044] The dust removal unit includes a dust filter element 601, support plates 602, rotating shafts 603, shaped paddles 604, connecting ropes 605, a first guide rod 606, a second guide rod 607, a sealing element 608, and a constriction element 609. A dust filter element 601 is installed on the left side of each of the two first guide pipes 402. Two support plates 602 are welded to the left side of the inner surface of each of the two first guide pipes 402. The dust filter element 601 is located between the two support plates 602 and is positioned above the ash discharge pipe 404. A rotating shaft 603 is rotatably connected between every two support plates 602. Each of the two rotating shafts 603 is rotatably connected to one dust filter element 601. A shaped paddle 604 is welded to each of the two rotating shafts 603. The left side of each of the two shaped paddles 604 contacts one dust filter element 601. A connecting rope 605 is wound around each shaft 603; a first guide rod 606 is welded to the right side of the inner surface of each of the two ash discharge pipes 404; a constriction piece 609 is welded to the inner surface of each of the two ash discharge pipes 404; the position of each constriction piece 609 inside the ash discharge pipe 404 is lower than the first guide rod 606; a second guide rod 607 is welded to the upper part of each of the two constriction pieces 609; each second guide rod 607 is located to the left of a first guide rod 606; the connecting rope 605 is connected to the first guide rod 606 and the second guide rod 607 in sequence; a sealing piece 608 is fixed to the lower end of each of the two connecting ropes 605; the lower part of each of the two constriction pieces 609 contacts and engages with a sealing piece 608; the upper part of the sealing piece 608 is conical, and a counterweight is provided at the lower part of the sealing piece 608.

[0045] Dust filter element 601 is a dust filter screen.

[0046] The irregularly shaped propeller 604 has bristles on its left side, and the blades of the irregularly shaped propeller 604 are twisted.

[0047] Working principle:

[0048] Fixed phase:

[0049] See the attached diagram, in which Figures 1 to 5 The specific implementation process shown is as follows:

[0050] Before using the circuit board drilling device, it is first installed in the HDI circuit board processing workshop and connected to the workshop's power supply. Since HDI circuit boards typically require blind via drilling, and the circuit boards are directional, the positions of the blind vias required on the top and bottom sides of the circuit board are inconsistent. Therefore, when the stability of the circuit board is poor, the vibration generated during drilling can cause displacement of the circuit board, leading to a decrease in drilling accuracy and even damage to the circuit board. At this point, the suction cup robot is controlled to transfer the circuit board to the fixed unit. The positioning angle and corner mark 10101 on the circuit board are then aligned on the same side of the placement platform 101. By pushing the circuit board, each side of the circuit board moves on a slide 10102. Under the action of gravity, the lower surface of the circuit board contacts the roller 106. During the movement of the circuit board, the friction between the circuit board and the roller 106 is rolling friction, which effectively reduces the friction and wear of the circuit board. Then, the circuit board is pushed until the positioning angle of the circuit board contacts the corner mark 10101. Then, the robot arm is withdrawn. At this time, when the robot arm is withdrawn, the circuit board loses the pushing force, and the positioning angle of the circuit board does not make tight contact with the corner mark 10101. Then, the four first electric sliders 5 are controlled to move to the right on the two first electric slide rails 4 respectively. The slider 5 drives the placement platform 101 to move to the right, simultaneously driving the push plate 105 to move to the right until the push plate 105 contacts the two contact blocks 6. The push plate 105 abuts against the two contact blocks 6. As the placement platform 101 continues to move to the right, the two first elastic telescopic rods 102 are compressed. Then, the placement platform 101 reaches below the second rack 205. The second rack 205 meshes with the first rack 201. As the placement platform 101 moves, the cross-sections of the tooth structures of the second rack 205 and the first rack 201 are both right-angled triangles. Therefore, when the second rack 205 moves to the left, the second rack 205 is limited by the tooth slope of the first rack 201. In the lower position, the second rack 205 moves upward, and the two elastic elements 202 adjacent to the second rack 205 are stretched until the second rack 205 moves downward and engages with the first rack 201 again. The two elastic elements 202 adjacent to the second rack 205 return to their original position, and the second rack 205 is limited by the vertical surface of the teeth of the first rack 201, so that the second rack 205 cannot move to the right. The above process is repeated until the push plate 105 contacts the right part of the circuit board on the two slides 10102. The push plate 105 pushes the circuit board to the left, so that the left end of the circuit board is in close contact with the placement platform 101. At this time, the positioning and fixing of the circuit board is completed.

[0051] Drilling stage:

[0052] See the attached diagram, in which Figures 6 to 9 The specific implementation process shown is as follows:

[0053] After the circuit board is fixed, the control starts two second electric sliders 303, each moving on a second electric slide rail 302. Each of the two second electric sliders 303 drives an electric actuator 304 to move. The two electric actuators 304 simultaneously drive the drill 305 and drill bit 306 to move. When they reach the position where drilling is required, the control starts the electric actuators 304 to extend, simultaneously driving the drill 305 and drill bit 306 to move towards the circuit board. The drill 305 drives the second elastic telescopic rod 401 towards the circuit board, simultaneously driving the protective cover 403 to move closer to the circuit board. Then, the rubber protective layer on the lower surface of the protective cover 403 contacts the surface of the circuit board. As the drill 305 and drill bit 306 move towards the circuit board... As the circuit board moves closer to it, the second elastic telescopic rod 401 is compressed. The elastic force of the second elastic telescopic rod 401 causes the rubber protective layer of the protective cover 403 to adhere tightly to the surface of the circuit board, effectively preventing dust and debris from passing through the protective cover 403 during drilling. When the drill bit 306 approaches the circuit board, the drill 305 is simultaneously activated, and its output shaft rotates, synchronously driving the drill bit 306 to rotate. The drill bit 306 then drills holes in the circuit board. By setting up two sets of drill bits 306, both upper and lower, double-sided blind hole drilling on the circuit board can be completed simultaneously without flipping the circuit board, effectively preventing wear on the blind holes during flipping and reducing drilling processing costs. To improve air quality, the two first conduits 402 are connected to the air pump, and the two ash discharge pipes 404 are connected to the dust collection box. The air pump then extracts air from the protective cover 403 through the first conduits 402. Since the drill bit 306 generates a large amount of heat, dust, and debris when drilling the circuit board, extracting air from the protective cover 403 helps create air convection at the drilling location, thus cooling the area and removing flying dust and debris. The extracted dust is blocked by the dust filter 601, effectively reducing dust clogging of the air pump. When drilling blind holes in the circuit board, the debris remains inside the blind holes and is then removed through the first conduits 402. The suction power of step 2 is insufficient to remove the dust from the blind hole. At this point, the electric actuator 304 retracts, simultaneously driving the drill bit 306 out of the blind hole on the circuit board. Simultaneously, the protective cover 403 disengages from the circuit board. Next, the second electric slider 303 moves on the second electric slide rail 302, adjusting the drilling position of the drill bit 306. Then, the drill bit 306 drills into the circuit board again. As the drill bit 306 moves closer to the circuit board, the suction head 503 also moves closer to the circuit board along with the protective cover 403 until the protective cover 403 is in close contact with the circuit board. At this point, the suction head 503 covers the blind hole, while the air pump continues to evacuate the first conduit 402.The first conduit 402 also extracts air from the annular tube 502 through two second conduits 504. The annular tube 502 then uses a suction head 503 to remove dust and debris from the blind holes, reducing their residue. This completes the vertical drilling of the circuit board. Next, the four first electric sliders 5 move on the two first electric slide rails 4, simultaneously moving the circuit board to the position for drilling below the drill bit 306, thus achieving omnidirectional drilling of the circuit board.

[0054] Automatic dust removal stage:

[0055] See the attached diagram, in which Figures 8 to 9 The specific implementation process shown is as follows:

[0056] When air is pumped into the first conduit 402, the air passes through the twisted, irregularly shaped propeller 604, which in turn rotates. The propeller 604 drives the rotating shaft 603 to rotate, and as the shaft rotates, it simultaneously winds up the connecting rope 605, which in turn pulls the sealing member 608 upwards until it seals the lower part of the constriction member 609. At this point, the propeller 604 stops rotating. During the pumping of air into the first conduit 402, dust and debris generated during drilling are also extracted. The air containing dust and debris passes through the dust filter 601. Dust and debris are blocked by the dust filter 601, remaining on the right side of the filter 601. As the drilling process progresses, the airflow through the first conduit 402 increases, carrying more dust and debris, which are then trapped on the filter 601. When excessive dust and debris accumulate on the filter 601, the airflow within the first conduit 402 decreases, and the air velocity drops. This reduces the cooling effect of the airflow on the circuit board and drill bit 306. At this point, the air pump stops pumping air, thus reducing the cooling effect within the first conduit 402. The air is not flowing, and the irregularly shaped propeller 604 cannot maintain its balanced, stationary state. Furthermore, because the sealing element 608 has a counterweight at its lower part, the force on the connecting rope 605 is insufficient to hold the sealing element 608 in place when the irregularly shaped propeller 604 cannot remain stationary. The sealing element 608 moves downwards, dragging the connecting rope 605 downwards. Since the upper part of the connecting rope 605 is wound around the rotating shaft 603, the downward drag of the connecting rope 605 causes the rotating shaft 603 to rotate, simultaneously driving the irregularly shaped propeller 604 to rotate. The bristles on the left side of the shaped paddle 604 also brush the right side of the dust filter 601, thereby brushing off the dust accumulated on the dust filter 601 and letting it fall into the dust discharge pipe 404. Then, it passes through the through hole in the middle of the constriction part 609 and is collected into the dust collection box. At the same time, as the shaped paddle 604 rotates, the air in the first guide tube 402 flows to the right. The rightward flow of air blows off the dust and debris that the bristles on the dust filter 601 cannot handle, effectively preventing dust from entering the mesh on the dust filter 601 under the action of the bristles. Thus, the cleaning of the accumulated dust is completed.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drilling device for HDI circuit board processing, comprising a frame (1), a portal frame (2), a tripod (3), a first electric slide rail (4), a first electric slider (5), and contact blocks (6); a portal frame (2) is fixedly connected to the left and right sides of the frame (1); a tripod (3) is fixedly connected to the front and rear of the frame (1); two first electric slide rails (4) are installed between the two portal frames (2); two first electric sliders (5) are slidably connected to the two first electric slide rails (4); two contact blocks (6) are fixedly connected to the right portal frame (2). Its characteristics are: It also includes a fixing unit, a locking unit, a drilling unit, a cooling unit, a hole cleaning unit, and a dust removal unit; the two front first electric sliders (5) and the two rear first electric sliders (5) are connected to a fixing unit for positioning and fixing the circuit board; the fixing unit is connected to a locking unit; the fixing unit is in contact with two contact blocks (6); the two tripods (3) are connected to a drilling unit for drilling holes in the circuit board; the drilling unit is connected to a cooling unit for air cooling of the drilling position; the cooling unit is connected to a hole cleaning unit for sucking up residual dust and debris in the hole; the cooling unit is connected to a dust removal unit for cleaning the dust and debris extracted during cooling and hole cleaning. The fixing unit includes a placement platform (101), a first elastic telescopic rod (102), a guide rod (103), a connecting plate (104), a push plate (105), and a roller (106). Four first electric sliders (5) are fixedly connected to a placement platform (101); the placement platform (101) is connected to the locking unit; the placement platform (101) is "C" shaped and the opening faces to the right; a corner mark (10101) for positioning the circuit board placement direction is provided on the left side of the placement platform (101); a slide (10102) is provided at the front and rear of the placement platform (101); two first elastic telescopic rods (102) are fixedly connected to the right side of the upper surface of the placement platform (101); each of the telescopic parts of the two first elastic telescopic rods (102) is fixedly connected to a connecting rod. Plate (104); two connecting plates (104) are connected to the locking unit; a guide rod (103) is fixedly connected to each of the opposite sides of the two connecting plates (104); both guide rods (103) are slidably connected to the placement table (101); a push plate (105) is fixedly connected between the two connecting plates (104); the position of the push plate (105) is higher than that of the slide table (10102); a row of rollers (106) for reducing friction during the placement of the circuit board is rotatably connected to the upper part of the push plate (105); the right side of the push plate (105) is in contact with two contact blocks (6); The locking unit includes a first rack (201), an elastic element (202), a connecting rod (203), a sliding rod (204), and a second rack (205); A first rack (201) is fixedly connected to the front right and rear right of the placement platform (101); two elastic elements (202) are fixedly connected to the upper surfaces of the two connecting plates (104); a connecting rod (203) is fixedly connected to the two adjacent elastic elements (202); two sliding rods (204) are fixedly connected to the lower part of the two connecting rods (203); each pair of sliding rods (204) is slidably connected to a connecting plate (104); a second rack (205) is fixedly connected to the lower part of each pair of sliding rods (204); each second rack (205) is in contact with a first rack (201); The drilling unit includes two drills (305) and a drill bit (306); The cooling unit includes a second elastic telescopic rod (401), a first conduit (402), a protective cover (403), and an ash discharge pipe (404). A second elastic telescopic rod (401) is fixedly connected between each of the two drill bits (305); a first conduit (402) is fixedly connected to each of the two second elastic telescopic rods (401) through a connecting block; both first conduits (402) are connected to the dust removal unit; the first conduits (402) are connected to the hole cleaning unit; a protective cover (403) is fixedly connected to the right side of each of the two first conduits (402); the two protective covers (403) are connected to the hole cleaning unit; the openings of the two protective covers (403) face opposite sides; each of the two protective covers (403) is slidably connected to a drill bit (306); a ash discharge pipe (404) is connected to the left side of each of the two first conduits (402); both ash discharge pipes (404) are connected to the dust removal unit. The cleaning unit includes a fixing plate (501), an annular tube (502), a suction head (503), and a second conduit (504); Each of the two protective covers (403) has a fixed plate (501) fixed to its right side; each of the two fixed plates (501) has an annular tube (502) fixed to its right side; each of the two annular tubes (502) has a ring of several vacuum heads (503) connected to its opposite side; each of the two annular tubes (502) has a second conduit (504) connected to its front and rear sides; the left sides of two adjacent second conduits (504) are connected to the first conduit (402); The dust removal unit includes a dust filter (601), a support plate (602), a rotating shaft (603), a shaped paddle (604), a connecting rope (605), a first guide rod (606), a second guide rod (607), a sealing component (608), and a constriction component (609). Each of the two first conduits (402) has a dust filter (601) installed on its left side; two support plates (602) are fixedly connected to the left side of the inner surface of each of the two first conduits (402); the dust filter (601) is located between the two support plates (602) and above the ash discharge pipe (404); a rotating shaft (603) is rotatably connected between each pair of support plates (602); each of the two rotating shafts (603) is rotatably connected to a dust filter (601); a shaped paddle (604) is fixedly connected to each of the two rotating shafts (603); the left side of each of the two shaped paddles (604) contacts a dust filter (601); a connecting rope (605) is wound around each of the two rotating shafts (603); a connecting rope (605) is fixedly connected to the right side of the inner surface of each of the two ash discharge pipes (404). A first guide rod (606); a constriction piece (609) is fixedly connected to the inner surface of each of the two ash discharge pipes (404); the position of each constriction piece (609) inside the ash discharge pipe (404) is lower than the first guide rod (606); a second guide rod (607) is fixedly connected to the upper part of each of the two constriction pieces (609); each second guide rod (607) is located to the left of a first guide rod (606); a connecting rope (605) is connected to the first guide rod (606) and the second guide rod (607) in sequence; a sealing piece (608) is fixedly connected to the lower end of the two connecting ropes (605); the lower part of each of the two constriction pieces (609) is in contact with a sealing piece (608); the upper part of the sealing piece (608) is conical, and a counterweight is provided at the lower part of the sealing piece (608).

2. The drilling apparatus for processing of an HDI circuit board according to claim 1, wherein: The drilling unit also includes a mounting bracket (301), a second electric slide rail (302), a second electric slider (303), and an electric actuator (304). A mounting bracket (301) is fixed between the two tripods (3); a second electric slide rail (302) is installed on the upper and lower parts of the mounting bracket (301); a second electric slider (303) is slidably connected to each of the two second electric slide rails (302); an electric actuator (304) is fixedly connected to each of the two second electric sliders (303); a drill bit (305) is fixedly connected to the telescopic part of each of the two electric actuators (304); a drill bit (306) is detachably connected to each of the two drill bits (305).

3. The drilling apparatus for processing of an HDI circuit board according to claim 1, wherein: The protective cover (403) has a rubber protective layer at the opening edge.

4. A drilling device for HDI circuit board processing according to claim 1, characterized in that: The dust filter element (601) is a dust filter screen.

5. A drilling device for HDI circuit board processing according to claim 1, characterized in that: The left side of the irregular propeller (604) is provided with bristles, and the blades of the irregular propeller (604) are twisted.

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