A positioning type drilling device for processing a circuit board

Abstract

The present application relates to the technical fields of integrated circuit manufacturing, and especially relates to a positioning type drilling device for circuit board processing. The device comprises a machine tool, a plurality of drillers are distributed on the machine tool, drill needles are slidably connected to the drillers, the drill needles are provided with chip removal grooves, a connecting block is fixedly connected to the machine tool, rotating frames are rotatably connected to the drillers, the drill needles are slidably and rotatably connected to moving frames, sliding blocks are fixedly connected to the moving frames, and cleaning blocks are fixedly connected to the moving frames. The present application can clean the impurities adhered to the chip removal grooves by the sliding blocks, so as to ensure the smoothness of the chip removal grooves, reduce the probability that cold air cannot enter the space between the drill needles and the circuit board due to the blockage of the chip removal grooves, thereby reducing the probability of heat accumulation of the circuit board during the drilling process, and the cleaning blocks can clean the upper edges of the circuit board, so as to reduce the burr amount of the upper edges of the circuit board, thereby ensuring the quality of the drilling of the circuit board.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of integrated circuit manufacturing, in particular to a positioning type PCB processing drilling device. BACKGROUND

[0002] PCB is a key component in electronic equipment, and drilling is an essential process in the PCB manufacturing process. Traditional drilling devices mainly use optical methods (i.e. using a camera to recognize optical reference points on the PCB), mechanical methods (pre-drilling standard size positioning holes on the edge of the PCB or assembled board), and laser (using laser ranging or scanning technology to quickly obtain the features of the board surface) to position the drilling position, and then using a high-speed drill bit to directly punch the pre-set drilling position on the PCB. Although the efficiency is high, our R&D personnel still found some defects in the existing technology during research and production. Because of the friction between the drill bit and the PCB during high-speed rotation and feeding, a large amount of heat is generated. Therefore, if the heat dissipation is not smooth, it will cause the material to melt or carbonize, affecting the quality of PCB drilling. Especially in high-density interconnection board (HDI) processing, the hole diameter is small and the hole pitch is dense, and the influence of heat is more significant. The surface of the common drill bit is often designed with a chip removal groove, which introduces cooling air from the outside into the drill hole. However, during the processing, the debris and resin residues easily block the groove, weakening the heat dissipation function of the chip removal groove, and causing heat accumulation, which affects the quality of PCB drilling. In addition, after the PCB is drilled, there will be a large amount of debris on the upper edge of the drilling, which will also affect the quality of PCB drilling. SUMMARY

[0003] In order to overcome the shortcomings pointed out in the background art, the present application provides a positioning type PCB processing drilling device.

[0004] The technical scheme of the present application is: a positioning type PCB processing drilling device, comprising a machine tool, the machine tool is provided with a plurality of drilling devices which are distributed at intervals, the drilling device is slidably connected with a drill bit, the drill bit is provided with a chip removal groove, the machine tool is fixedly connected with a plurality of connecting blocks which are distributed at intervals, the opposite sides of adjacent two connecting blocks are fixedly connected with supporting plates, the drilling device is rotatably connected with a rotating frame, the drill bit is slidably and rotatably connected with a moving frame, the rotating frame and the adjacent moving frame are fixedly connected with a first elastic member, the moving frame is slidably connected with the adjacent rotating frame, the moving frame is fixedly connected with a sliding block, the sliding block slides in the adjacent chip removal groove, the sliding block is used for cleaning the chip removal groove, the lower side of the moving frame is fixedly connected with a cleaning block, and the cleaning block is used for cleaning the drilling of the PCB.

[0005] As preferred, the upper part of the drill needle is slidably connected with a plurality of polishing strips distributed in a circumferential direction, and the upper part of the drill needle and the polishing strips are used for polishing the drilled hole of the circuit board.

[0006] As preferred, the height of the upper part of the chip removal groove is higher than the height of the adjacent polishing strip, and the lower side of the cleaning block is higher than the upper side of the polishing strip when the sliding block moves to the limit position of the adjacent upper part of the chip removal groove.

[0007] As preferred, the drill needle is provided with air bags, the polishing strips distributed in a circumferential direction are all fixedly connected with adjacent air bags, the drill hole device is fixedly connected with an extrusion column, the extrusion column is used for extruding adjacent air bags, the machine tool is provided with the same number of electric control push rods as the drill hole device, the electric control push rods are located below adjacent drill hole devices, and the electric control push rods are fixedly connected with pressing plates, and the pressing plates are used for extruding adjacent drill needles.

[0008] As preferred, the support force of the air bags and the extrusion column on the drill needle is greater than the reaction force of the circuit board on the drill needle, and the extrusion force of the pressing plate on the adjacent drill needle is greater than the support force of the air bags and the extrusion column on the drill needle.

[0009] As preferred, the drill hole device is fixedly connected with a support frame, the support frame is provided with a through hole, the axis of the through hole is collinear with the axis of the drill needle, the upper surface of the support frame is flush with the upper surface of the support plate, and the support frame is used for supporting the surrounding of the drilled hole on the circuit board.

[0010] As preferred, the support frame is provided with a motor, the output shaft of the motor is fixedly connected with a cylindrical shell, a sliding plate is slidably connected in the cylindrical shell, a second elastic member is fixedly connected between the sliding plate and the cylindrical shell, and the sliding plate is fixedly connected with a polishing block, and the polishing block is used for polishing the drilled hole.

[0011] As preferred, the polishing block is in a circular truncated cone shape, and the diameter of the polishing block gradually increases from top to bottom.

[0012] As preferred, the connecting block is slidably connected with a clamping plate, the clamping plate is located above the adjacent support plate, the clamping plate is fixedly connected with a water tank, the water tank is in communication with an external liquid supply system, and the clamping plate and the adjacent support plate are used for clamping the circuit board.

[0013] As preferred, the support plate and the opposite side of the corresponding clamping plate are both provided with inclined surfaces, the inclined surfaces are used for guiding the circuit board, so as to facilitate the insertion of the circuit board between the support plate and the adjacent clamping plate.

[0014] The present application has the following advantages: the present application cleans the impurities adhered in the chip groove by the sliding block, so as to ensure the smoothness of the chip groove, reduce the probability that the cold air cannot enter between the drill needle and the circuit board due to the blockage of the chip groove, thereby reducing the probability of heat accumulation of the circuit board during the drilling process, and the upper edge of the drilling of the circuit board is cleaned by the cleaning block, so as to reduce the burr amount of the upper edge of the circuit board, thereby ensuring the quality of the drilling of the circuit board, and the drilling of the circuit board is polished by the upper part of the drill needle and the polishing strip, so as to reduce the burr amount in the circuit board and improve the quality of the inner wall of the circuit board after drilling, then the polishing strip is extruded by the air bag, so that the polishing strip draws a micro vertical groove in the inner wall of the drilling, so as to increase the adhesion area of the subsequent copper ions in the drilling, reduce the workload of additional grooving during the subsequent production of the circuit board, improve the efficiency of the production of the circuit board, after the circuit board is inserted between the clamping plate and the supporting plate, the liquid is injected into the water tank by the external liquid supply system, so that the pressure on the clamping plate increases, the circuit board is pressed, and the stability of the circuit board during the drilling process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0016] Figure 2 is a schematic diagram of the three-dimensional structure of the drill of the present application;

[0017] Figure 3 is a schematic diagram of the three-dimensional structure of the connecting block of the present application;

[0018] Figure 4 is a schematic diagram of the three-dimensional structure of the drill needle of the present application;

[0019] Figure 5 is a schematic diagram of the three-dimensional structure of the extrusion column of the present application;

[0020] Figure 6 is a schematic diagram of the three-dimensional structure of the sliding block and the cleaning block of the present application;

[0021] Figure 7 is a schematic diagram of the three-dimensional structure of the electric control push rod and the pressing plate of the present application;

[0022] Figure 8 is a schematic diagram of the three-dimensional structure of the supporting frame of the present application;

[0023] Figure 9 is a schematic diagram of the three-dimensional structure of the polishing block of the present application.

[0024] In the attached diagrams: 1-Machine tool, 2-Drilling tool, 3-Drill bit, 301-Chip removal groove, 4-Connecting block, 5-Support plate, 6-Rotating frame, 7-First elastic element, 8-Moving frame, 9-Sliding block, 10-Cleaning block, 11-Grinding strip, 12-Airbag, 13-Extrusion column, 14-Electrically controlled push rod, 15-Pressure plate, 16-Support frame, 1601-Through hole, 17-Motor, 1701-Cylindrical shell, 18-Sliding plate, 19-Second elastic element, 20-Grinding block, 21-Clamping plate, 22-Water tank, 23-Inclined surface. Detailed Implementation

[0025] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0026] Example 1: The drill bit of the existing circuit board drilling device is designed with a chip removal groove (or chip removal channel). The external cooling airflow is introduced into the drill hole through the chip removal groove. However, during the processing, debris and resin residue can easily block the channel, weaken the heat dissipation function of the chip removal groove, and thus cause heat accumulation, which affects the quality of the circuit board drilling.

[0027] A drilling device for positioning type circuit board processing, such as Figures 1-6 As shown, the machine tool includes a machine tool 1, which is equipped with four drill bits 2 spaced apart. The machine tool 1 has a control terminal (not shown in the figure), and the drill bits 2 are electrically connected to the control terminal. Drill bits 3 are slidably connected to the drill bits 2. The drill bits 2 are of existing structure. The machine tool 1 is equipped with a power component for driving the drill bits 2 to move up and down, left and right, and forward and backward. This power component is of existing structure and is not shown in the figure. This power component is electrically connected to the control terminal and drives the drill bits 3 to rotate. The drill bits 3 are equipped with chip removal grooves 301. Several connecting blocks spaced apart are fixedly connected to the machine tool 1. 4. The diagram shows four drill bits 2 as an example. Each drill bit 2 is located between two adjacent connecting blocks 4. The number of connecting blocks 4 is one more than the number of drill bits 2. For example, five connecting blocks 4 are used. Support plates 5 are fixedly connected to opposite sides of each adjacent connecting block 4. The support plates 5 support the circuit board. Drill bits 2 are rotatably connected to a rotating frame 6. Drill needles 3 are slidably and rotatably connected to a movable frame 8. A first elastic element 7 (a compression spring) is fixedly connected between the rotating frame 6 and the adjacent movable frame 8. The movable frame 8 is slidably connected to the adjacent rotating frame 6 and is fixedly connected to a sliding block 9. Figure 1The top view is the reference of the rotating direction. When the drill bit 3 rotates clockwise, the sliding block 9 slides upward in the adjacent chip groove 301. After a hole is drilled on the circuit board, the drill bit 3 rotates counterclockwise, and the sliding block 9 slides downward in the adjacent chip groove 301. The sliding block 9 cleans the impurities adhered in the chip groove 301, so as to ensure the smoothness of the chip groove 301, improve the drilling efficiency and quality, reduce the probability that the cold air cannot enter between the drill bit 3 and the circuit board due to the blockage of the chip groove 301, and thus reduce the probability of heat accumulation on the circuit board during the drilling process, so as to ensure the quality of the circuit board drilling. The lower side of the moving frame 8 is fixedly connected with the cleaning block 10 made of flexible material. When the cleaning block 10 is close to the surface of the circuit board, the drill bit 3 continues to rotate clockwise and drives the moving frame 8 to rotate through the chip groove 301 and the sliding block 9. The moving frame 8 drives the cleaning block 10 to rotate, and the cleaning block 10 cleans the upper edge of the hole drilled on the circuit board, so as to reduce the burr amount on the upper edge of the circuit board, thereby improving the quality of the circuit board after drilling.

[0028] As shown in Figure 5 and Figure 6 The upper part of the drill bit 3 is slidably connected with the circumferentially distributed several polishing strips 11. Initially, the several polishing strips 11 and the outer circumferential side of the drill bit 3 together form a smooth annular surface. The upper part of the drill bit 3 and the polishing strip 11 are used for polishing the hole drilled on the circuit board. The height of the upper part of the chip groove 301 is higher than the height of the adjacent polishing strip 11. When the sliding block 9 moves to the upper limit position of the adjacent chip groove 301, the lower side of the cleaning block 10 is higher than the upper side of the polishing strip 11, so as to ensure that the polishing strip 11 completely penetrates into the hole drilled on the circuit board.

[0029] As shown in Figure 6 and Figure 7As shown, the drill needle 3 is provided with an air bag 12, and the circumferentially distributed polishing strips 11 are all fixedly connected with the adjacent air bag 12. The drill 2 is fixedly connected with an extrusion column 13. When the drill needle 3 moves upward relative to the extrusion column 13, the extrusion column 13 extrudes the adjacent air bag 12, so that the air bag 12 expands. When the air bag 12 expands, the air bag 12 extrudes all the polishing strips 11 thereon, so that the circumferentially distributed polishing strips 11 are scattered in all directions. The machine tool 1 is provided with the same number of electric control push rods 14 as the drill 2. The electric control push rod 14 is electrically connected with a control terminal. The electric control push rod 14 is located below the adjacent drill 2. The electric control push rod 14 is fixedly connected with a pressing plate 15. After the drill needle 3 drills a hole on the circuit board, the telescopic part of the electric control push rod 14 drives the pressing plate 15 to move upward. The pressing plate 15 extrudes the adjacent drill needle 3. The supporting force of the air bag 12 and the extrusion column 13 on the drill needle 3 is greater than the reaction force of the circuit board on the drill needle 3. The extrusion force of the pressing plate 15 on the adjacent drill needle 3 is greater than the supporting force of the air bag 12 and the extrusion column 13 on the drill needle 3. When the drill needle 3 drills the circuit board, the drill needle 3 does not move relative to the drill 2. When the pressing plate 15 extrudes the drill needle 3, the drill needle 3 stops rotating, and the drill needle 3 moves relative to the drill 2.

[0030] The specific working principle is as follows:

[0031] When the operator needs to use the device to drill the circuit board, the operator places the circuit board on the corresponding two supporting plates 5, so that the circuit board is located below the corresponding drill 2. Then, the control terminal is started to drive the power element and the drill 2. The power element drives the drill needle 3 to move horizontally through the drill 2. After the drill needle 3 is aligned with the position to be drilled, the power element drives the drill needle 3 to move downward through the drill 2. The drill 2 drives the drill needle 3 to rotate clockwise. The direction of rotation is taken as the reference of the top view. When the drill needle 3 contacts the circuit board, the drill 2 drives the drill needle 3 to slowly move downward to drill the circuit board. Figure 1 The top view is taken as the reference. When the drill needle 3 contacts the circuit board, the drill 2 drives the drill needle 3 to slowly move downward to drill the circuit board.

[0032] In the process of drilling the circuit board by the drill 2 driving the drill needle 3 to move downward, the drill needle 3 drives the cleaning block 10 to move downward to be attached to the circuit board through the chip removal groove 301, the sliding block 9 and the moving frame 8. With the clockwise rotation of the drill needle 3, the sliding block 9 moves upward relative to the drill needle 3 along the chip removal groove 301. The first elastic element 7 is compressed. The sliding block 9 drives the cleaning block 10 to move upward relative to the drill needle 3 through the moving frame 8.

[0033] When the sliding block 9 moves upward relative to the drill needle 3 along the chip removal groove 301 to the limit position, the drill needle 3 rotates clockwise and drives the sliding block 9 to rotate clockwise through the chip removal groove 301. The sliding block 9 drives the cleaning block 10 to rotate through the moving frame 8 (at this time, the moving frame 8 drives the rotating frame 6 to rotate). The cleaning block 10 cleans the upper edge of the drilled circuit board to reduce the burr amount of the upper edge of the circuit board, thereby improving the quality of the drilled circuit board.

[0034] With the clockwise rotation and downward movement of the drill needle 3, a hole on the circuit board is drilled (when a hole on the circuit board is drilled, the upper part of the drill needle 3 is polished with the polishing strip 11 to the hole on the circuit board to reduce the amount of burrs in the circuit board and improve the quality of the inner wall of the circuit board hole), and then the drill needle 3 is moved upward and counterclockwise by the drill 2, in the process of counterclockwise rotation of the drill needle 3, the sliding block 9 moves downward along the chip removal groove 301, the sliding block 9 cleans the impurities adhered in the chip removal groove 301 to ensure the smoothness of the chip removal groove 301, improve the drilling efficiency and quality, and reduce the probability that cold air cannot enter between the drill needle 3 and the circuit board due to the blockage of the chip removal groove 301, thereby reducing the probability of heat accumulation in the circuit board during drilling, to ensure the quality of the circuit board drilling.

[0035] In the process of moving the sliding block 9 downward along the chip removal groove 301, the first elastic member 7 gradually rebounds, so that the moving frame 8 drives the cleaning block 10 to gradually reset, in the process of upward movement of the drill needle 3, the operator starts the electric push rod 14 through the control terminal, the telescopic part of the electric push rod 14 drives the pressing plate 15 to move upward, the pressing plate 15 extrudes the adjacent drill needle 3 to move upward relative to the drill 2, the drill needle 3 moves upward relative to the extrusion column 13, the drill needle 3 drives the moving frame 8 to move upward relative to the drill 2 through the chip removal groove 301 and the sliding block 9, the first elastic member 7 is compressed, the extrusion column 13 extrudes the adjacent air bag 12 to make the air bag 12 expand, when the air bag 12 expands, the air bag 12 extrudes all the polishing strips 11 thereon to make the circumferentially distributed polishing strips 11 spread outwards, the inner wall of the hole is extruded by the polishing strips 11, in the process of upward movement of the drill needle 3 with all the polishing strips 11 thereon, the inner wall of the hole is drawn by the polishing strips 11 to form micro vertical grooves, to increase the adhesion area of the subsequent copper ions in the hole, reduce the workload of additional slotting in the subsequent production of the circuit board, and improve the efficiency of the circuit board production.

[0036] When the drill needle 3 moves upward and separates from the hole, the first elastic member 7 rebounds, so that the moving frame 8 drives the drill needle 3 to move downward relative to the drill 2 through the sliding block 9 and the chip removal groove 301, the operator controls the telescopic part of the electric push rod 14 to drive the pressing plate 15 to move downward and reset through the control terminal, and then closes the electric push rod 14, the operator repeats the above steps to punch the next position of the circuit board, when the circuit board is punched, the operator controls the drill 2 to reset through the control terminal, closes the power member and the drill 2, and then takes out the punched circuit board, cleans the device for the next use.

[0037] In the embodiment 2, the circuit board is placed on the machining table directly after the drilling, which will affect the drilling of the circuit board, especially the through hole, and cause the drill to not completely penetrate the circuit board, resulting in incomplete drilling and affecting the quality of the lower edge of the through hole of the circuit board.

[0038] In the embodiment 1, the drill 2 is provided with a support frame 16, and the support frame 16 is provided with a through hole 1601 whose axis is collinear with the axis of the drill needle 3. Figure 7 As shown in Figure 8 The support frame 16 is used to support the surrounding of the drilled hole on the circuit board to ensure the stability of the circuit board during placement and drilling.

[0039] As shown in Figure 8 As shown in Figure 9 The support frame 16 is provided with a motor 17 electrically connected with the control terminal, and the output shaft of the motor 17 is fixedly connected with a cylindrical shell 1701, and the cylindrical shell 1701 is slidably connected with a sliding plate 18. The output shaft of the motor 17 is used to drive the sliding plate 18 to rotate through the cylindrical shell 1701, and the second elastic element 19 is fixedly connected between the sliding plate 18 and the cylindrical shell 1701. The second elastic element 19 is a compression spring. The sliding plate 18 is fixedly connected with a polishing block 20. When the polishing block 20 is pressed by the circuit board, the second elastic element 19 is in a force storage state. The polishing block 20 is used to polish the drilled hole. The polishing block 20 is in the shape of a circular truncated cone, and the diameter of the polishing block 20 gradually increases from top to bottom to adapt to the drilled holes of different diameters on the circuit board. After the circuit board is drilled, the drill needle 3 drills the next hole on the circuit board. During the movement of the power element, the drill 2 drives the support frame 16 to move. When the support frame 16 drives the motor 17 to move to the formed drilled hole, the second elastic element 19 is ejected, so that the polishing block 20 is inserted into the formed drilled hole of the circuit board. The control terminal controls the output shaft of the motor 17 to rotate. The output shaft of the motor 17 drives the sliding plate 18 to rotate through the cylindrical shell 1701. The sliding plate 18 drives the polishing block 20 to rotate. The polishing block 20 polishes the lower edge of the drilled hole of the circuit board to reduce the burr amount of the lower edge of the drilled hole of the circuit board and improve the drilling quality of the circuit board. After the lower edge of the drilled hole of the circuit board is polished, the control terminal turns off the motor 17. The support frame 16 drives the motor 17 to move. The polishing block 20 is pressed downwardly by the circuit board, so that the second elastic element 19 is compressed to store force. The above steps are repeated to continuously polish the lower edge of the drilled hole of the circuit board.

[0040] In the embodiment 3, the drill 2 is provided with a support frame 16, and the support frame 16 is provided with a through hole 1601 whose axis is collinear with the axis of the drill needle 3. Figure 7 As shown in Figure 8As shown, the connecting block 4 is slidingly connected with a clamping plate 21, the clamping plate 21 is located above the adjacent support plate 5, the clamping plate 21 is fixedly connected with a water tank 22, the water tank 22 is communicated with an external liquid supply system, the clamping plate 21 and the adjacent support plate 5 are used for clamping the circuit board together, the external liquid supply system is a prior structure and is not shown in the figure, the external liquid supply system is electrically connected with a control terminal, when the circuit board is inserted between the clamping plate 21 and the support plate 5, the water tank 22 is not filled with liquid, after the circuit board is inserted between the clamping plate 21 and the support plate 5, liquid is injected into the water tank 22 through the external liquid supply system, so that the pressure on the clamping plate 21 is increased, the circuit board is pressed tightly, and the stability of the circuit board during the drilling process is improved, after the circuit board is processed, the liquid in the water tank 22 is pumped out through the external liquid supply system, and the circuit board can be taken out, the opposite side of the support plate 5 corresponding to the clamping plate 21 is provided with an inclined surface 23, the inclined surface 23 is used for guiding the circuit board, so as to facilitate the insertion of the circuit board between the support plate 5 and the adjacent clamping plate 21.

[0041] The embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.

Claims

1. A drilling device for positioning circuit board processing, comprising a machine tool (1), wherein the machine tool (1) is equipped with a plurality of drills (2) spaced apart, each drill (2) is slidably connected to a drill bit (3), the drill bit (3) is provided with a chip removal groove (301), and the machine tool (1) is fixedly connected to a plurality of connecting blocks (4) spaced apart, wherein a support plate (5) is fixedly connected to the opposite sides of two adjacent connecting blocks (4), characterized in that, The drill (2) is rotationally connected with a rotating frame (6), the drill needle (3) is slidingly and rotationally connected with a moving frame (8), the rotating frame (6) and the adjacent moving frame (8) are fixedly connected with a first elastic member (7), the moving frame (8) is slidingly connected with the adjacent rotating frame (6), the moving frame (8) is fixedly connected with a sliding block (9), the sliding block (9) slides in the adjacent chip groove (301), the sliding block (9) is used for cleaning the chip groove (301), the lower side of the moving frame (8) is fixedly connected with a cleaning block (10), and the cleaning block (10) is used for cleaning the drilling of the circuit board. The upper part of the drill needle (3) is slidingly connected with a plurality of polishing strips (11) distributed in the circumference, and the upper part of the drill needle (3) and the polishing strip (11) are used for polishing the drilling of the circuit board. The height of the upper part of the chip groove (301) is higher than the height of the adjacent polishing strip (11), and when the sliding block (9) moves to the upper limit position of the adjacent chip groove (301), the lower side of the cleaning block (10) is higher than the upper side of the polishing strip (11). The drill needle (3) is provided with an air bag (12), and the polishing strips (11) distributed in the circumference are fixedly connected with the adjacent air bags (12), the drill (2) is fixedly connected with an extrusion column (13), the extrusion column (13) is used for extruding the adjacent air bag (12), the machine tool (1) is installed with the same number of electric control push rods (14) as the drill (2), the electric control push rod (14) is located below the adjacent drill (2), the electric control push rod (14) is fixedly connected with a pressing plate (15), and the pressing plate (15) is used for extruding the adjacent drill needle (3). The supporting force of the air bag (12) and the extrusion column (13) on the drill needle (3) is greater than the reaction force generated by the circuit board on the drill needle (3), and the extrusion force of the pressing plate (15) on the adjacent drill needle (3) is greater than the supporting force of the air bag (12) and the extrusion column (13) on the drill needle (3).

2. The positioning type hole drilling apparatus for a circuit board according to claim 1, wherein The drill (2) is fixedly connected with a support frame (16), the support frame (16) is provided with a through hole (1601), the axis of the through hole (1601) is collinear with the axis of the drill needle (3), the upper surface of the support frame (16) is flush with the upper surface of the support plate (5), and the support frame (16) is used for supporting the surrounding of the drilled hole on the circuit board.

3. The positioning type hole drilling apparatus for a circuit board according to claim 2, wherein The support frame (16) is installed with a motor (17), the output shaft of the motor (17) is fixedly connected with a cylindrical shell (1701), the cylindrical shell (1701) is slidingly connected with a sliding plate (18), the second elastic member (19) is fixedly connected between the sliding plate (18) and the cylindrical shell (1701), and the sliding plate (18) is fixedly connected with a polishing block (20) for polishing the drilled hole.

4. The positioning type hole drilling apparatus for a circuit board according to claim 3, wherein The polishing block (20) is a circular truncated cone, and the diameter of the polishing block (20) gradually increases from top to bottom.

5. The positioning type hole drilling apparatus for a circuit board according to claim 1, wherein The connecting block (4) is slidably connected with a clamping plate (21), the clamping plate (21) is located above the adjacent support plate (5), the clamping plate (21) is fixedly connected with a water tank (22), the water tank (22) is communicated with an external liquid supply system, and the clamping plate (21) and the adjacent support plate (5) are used for clamping the circuit board together.

6. The positioning type hole drilling apparatus for a wiring board according to claim 5, wherein The support plate (5) and the opposite side of the corresponding clamping plate (21) are provided with inclined surfaces (23), and the inclined surfaces (23) are used for guiding the circuit board, so that the circuit board is inserted between the support plate (5) and the adjacent clamping plate (21).

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