A high-precision laser drilling device for circuit board

Abstract

The application discloses a high-precision circuit board laser drilling processing device and belongs to the technical field of circuit board processing devices, which comprises a cooling collection mechanism, the cooling collection mechanism comprises a box body provided with a laser drill inside, a gas cylinder is fixedly installed at the top of the box body, a piston rod at the bottom of the gas cylinder penetrates through the box body and extends to a first gear plate, the outer wall of the first gear plate is in meshing transmission with a horizontally distributed second gear plate through rotating gears, a first shielding plate fixed on a resisting rod is installed at the extension of one end of the first gear plate, and a movable groove is connected to the first shielding plate along the height direction of an air inlet; and a pushing rod is connected to the top of the second gear plate through a support. The application can solve the technical problem that a large amount of heat is generated on the circuit board due to the action of a light beam, so that the surface temperature of the circuit board is too high after drilling is completed, scalding is easily caused, and the operation safety of personnel is affected.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of circuit board processing devices, and particularly relates to a high-precision circuit board laser drilling processing device. BACKGROUND

[0002] A circuit board is a carrier on which conductive lines are formed on an insulating substrate through physical etching or chemical deposition processes. Its core functions can be summarized as three points: component support, electrical connection, and signal transmission. Through a pre-designed layout of lines, a circuit board can accurately fix components such as resistors, capacitors, and chips, and establish stable electrical paths to ensure that electric current flows along the predetermined path. This design not only avoids the complexity and unreliability of traditional manual soldering, but also realizes the miniaturization and integration of electronic devices; laser drilling has been widely used in precision machining, microelectronics, chip manufacturing, flat plate drilling, and dentistry. The high aspect ratio and non-contact characteristics of this process make it comparable to traditional machining processes such as mechanical drilling or electrochemical machining.

[0003] Laser drilling is a non-contact processing technology that forms single holes or array holes on the surface of a material by removing part of the material on the surface. It is done by using a single-pulse or multi-pulse short laser beam or ultrashort intense laser beam guided by a beam focusing system. Continuous wave lasers can also be used, but compared to pulsed lasers, continuous wave lasers have a higher risk of causing thermal damage to the material.

[0004] When a circuit board is subjected to laser drilling, a large amount of heat is generated on the circuit board due to the action of the light beam, which causes the surface temperature of the circuit board to be too high after drilling is completed, which can easily cause burns and affect the safety of personnel operation. In addition, for the smoke and dust particles generated by laser operation, they are generally filtered and adsorbed by a filter plate. However, during the extraction process, the dispersed particles need to be swept to a place and then removed, which is complicated and does not facilitate improving work efficiency. SUMMARY

[0005] The purpose of the present application is to provide a high-precision circuit board laser drilling processing device to solve the technical problem of high surface temperature of the circuit board after drilling is completed due to the action of the light beam, which can easily cause burns and affect the safety of personnel operation.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] A high-precision circuit board laser drilling processing device, comprising:

[0008] The cooling collection mechanism comprises a box body provided with a laser drill inside, a cylinder fixedly installed at the top end of the box body, a piston rod at the bottom of the cylinder penetrating through the box body and extending to a first gear plate, a second gear plate horizontally distributed and driven by a rotating gear meshing with the outer wall of the first gear plate, a first shielding plate fixed on a resisting rod and installed at the extension end of the first gear plate, and a movable groove connected to the first shielding plate along the height direction of the air inlet;

[0009] The top end of the second gear plate is connected with a push rod through a support, one end of the push rod is connected with a second shielding plate, the top of the second shielding plate is abutted on a ventilation pipeline on the inner wall of the box body, a conical air outlet on the ventilation pipeline is connected in a neutralization reaction tank through a U-shaped pipe, and a sampling pipe extending into the box body is arranged between the ventilation pipeline and the cylinder.

[0010] Further, a lifting rod movably connected to the battery box is arranged below the resisting rod, the bottom of the lifting rod penetrates through the battery box and extends to a movable block, one end of the movable block is connected to the bottom inner wall of the battery box through a compression spring, and the opposite end is connected with a conical insertion rod extending to the gap between the battery groups.

[0011] Further, positioning holes arranged on the inner wall of the battery box are arranged at the two ends of the battery group, and protective plates arranged on the inner wall of the battery box are arranged on the two sides of the battery group, the battery group is installed with an electric push rod and a first motor in an electrically connected manner, the output shaft of the first motor extends to a sleeve, a flexible shaft movably connected to the sleeve is arranged on the sleeve, and a fan blade arranged on a flow guide groove is connected to the flexible shaft, and one end of the flow guide groove extends to the ventilation pipeline.

[0012] Further, a bearing connected with the flexible shaft is installed on the push rod of the electric push rod, an annular groove arranged on the flexible shaft is arranged on the outer wall edge of the bearing, and the output shaft of the first motor and the sleeve are fixedly connected through a shaft coupling.

[0013] Further, a workbench arranged on the inner wall bottom of the box body is arranged below the laser drill, a second motor is fixedly installed on the workbench, the output shaft of the second motor extends to a reciprocating lead screw, a strip-shaped groove arranged on the workbench is connected to the reciprocating lead screw in the length direction, reversely moving clamping plates are spirally driven at the two ends of the reciprocating lead screw, a sliding groove is formed at the length direction of the clamping plate close to the center of the workbench, side plates symmetrical to the center of the workbench are movably connected to the sliding groove, and the side plates and the clamping plates are connected in a manner that the side plates are connected to the clamping plates through the adjusting bolt in a locking and fastening manner.

[0014] Further, the U-shaped pipe is connected with a filtering assembly extending into the neutralization reaction tank, the filtering assembly comprises a filtering box fixed on the U-shaped pipe, a pull plate movably connected on the filtering box, a handle integrally connected on one end of the pull plate, and a filter plate placed on the filtering box, a filter hole penetrating through the filter plate being formed on the filter plate.

[0015] Further, the filter plate is integrally connected with a protruding part on both ends, a third gear plate is connected on the top end of the protruding part close to the pull plate, a sealing groove is connected on the inner wall of the filtering box close to the third gear plate, the top of the third gear plate is engaged with an intermittent gear, the first rotating shaft and the second rotating shaft on the intermittent gear are drivingly connected through a conveying belt, the second rotating shaft is fixedly connected with a rotating plate, and the inner wall of the filtering box is provided with a receiving opening connected with the rotating plate, the rotating plate and the top of the filter plate are movably contacted or separated with each other with the rotation of the first rotating shaft.

[0016] Further, the second shielding plate is provided with a material falling groove, and the second shielding plate is connected with the ventilation pipeline and the sampling pipe.

[0017] As described above, by adopting the above technical scheme, the present application has the following beneficial effects:

[0018] In the present application, when the laser drilling device needs to perform laser drilling on the circuit board, the cylinder is started to drive the first gear plate to move downward, under the gear engagement and transmission, the second gear plate in the horizontal direction moves towards the sampling pipe and closes the sampling pipe opening, and at the same time, the air inlet of the ventilation pipeline is opened, during the downward movement of the first gear plate, the air inlet is opened through the first shielding plate, so that the gas in the box can flow normally, and the tapered plug rod in the battery box can be separated from the battery pack through the downward movement of the contact rod, so as to supply power to the electric push rod and the first motor, and the annular groove on the bearing can rotate the fan blade at different heights to guide the gas into the ventilation pipeline, thereby facilitating the subsequent filtering and purification work, after the laser operation is completed, the cylinder drives the first shielding plate to return and closes the air inlet, and the sealing cover on the sampling pipe can ensure the sealing of the processing device, thereby achieving the dustproof effect of the workbench.

[0019] In the present application, the sampling pipe can play the role of sealing cover through the horizontal movement of the second shielding plate, and the second shielding plate can further increase the closing effect during the horizontal movement, and can open the air outlet of the ventilation pipeline, since the impurities attached to the inner wall of the ventilation pipeline may fall off when the ventilation pipeline is not used, the material falling groove is arranged on the second shielding plate to facilitate the collection of impurities, and the sampling pipe opening is cleaned, thereby effectively ensuring the cleanliness of the box.

[0020] In the application, during the starting process of the second motor, the clamping plates at both ends can be moved to a specified distance, and the side plates can be connected by adjusting the locking fastening during the movement of the sliding groove, so that the side plates at both ends cooperate with the clamping plates to adaptively clamp and fix circuit boards of different sizes, thereby avoiding shaking phenomenon during laser processing, effectively ensuring the accuracy of circuit board processing, and improving product quality.

[0021] In the application, the filter plate on the filter assembly can filter particulate impurities. When the filter plate is pulled out by the handle, the rotating plate on the second rotating shaft is attached to the top of the filter plate under the gear meshing transmission, so that the particulate matter can be swept to one place on the filter plate, thereby facilitating subsequent cleaning work. In addition, when the filter plate is inserted into the filter box, the rotating plate can be returned under the gear meshing transmission and fall into the storage opening, so as to avoid affecting the normal filtering work of the exhaust gas. In addition, the intermittent gear can avoid excessive rotation angle to hinder the normal rotation of the rotating plate, and can also reduce the energy consumption of meshing transmission and reduce resistance, thereby facilitating personnel operation. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 is a structural schematic view of a high-precision circuit board laser drilling processing device of the present application;

[0024] Figure 2 is a front view of a high-precision circuit board laser drilling processing device of the present application;

[0025] Figure 3 is an internal schematic view of the box body of the present application;

[0026] Figure 4 is a structural schematic view of the second shielding plate of the present application;

[0027] Figure 5 is an internal schematic view of the battery box of the present application;

[0028] Figure 6 is a structural schematic view of the workbench of the present application;

[0029] Figure 7 is an enlarged view of A of the present application; Figure 1 ​

[0030] Figure 8 is the connection diagram of the pull plate and filter plate of the application;

[0031] Figure 9 is the partial sectional view of the filter box in the front view direction of the application.

[0032] Fig. 1 is a cooling collection mechanism; Fig. 2 is a laser drill; Fig. 3 is a box; Fig. 4 is an air cylinder; Fig. 5 is a first gear plate; Fig. 6 is a rotating gear; Fig. 7 is a second gear plate; Fig. 8 is a contact rod; Fig. 9 is a first shielding plate; Fig. 10 is a push rod; Fig. 11 is a second shielding plate; Fig. 12 is a ventilation duct; Fig. 13 is a U-shaped tube; Fig. 14 is a neutralization reaction tank; Fig. 15 is a sampling tube; Fig. 16 is a battery box; Fig. 17 is a lifting rod; Fig. 18 is a movable block; Fig. 19 is a compression spring; Fig. 20 is a battery pack; Fig. 21 is a conical plug; Fig. 22 is a protective plate; Fig. 23 is an electric push rod; Fig. 24 is a first motor; Fig. 25 is a sleeve; Fig. 26 is a telescopic shaft; Fig. 27 is a fan blade; Fig. 28 is a bearing; Fig. 29 is a workbench; Fig. 30 is a second motor; Fig. 31 is a reciprocating screw; Fig. 32 is a clamping plate; Fig. 33 is a side plate; Fig. 34 is a filter assembly; Fig. 35 is a filter box; Fig. 36 is a pull plate; Fig. 37 is a handle; Fig. 38 is a filter plate; Fig. 39 is a filter hole; Fig. 40 is a third gear plate; Fig. 41 is an intermittent gear; Fig. 42 is a first rotating shaft; Fig. 43 is a second rotating shaft; Fig. 44 is a conveyor belt; Fig. 45 is a rotating plate; Fig. 46 is a blanking groove; Fig. 47 is a telescopic rod. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0034] Reference is made to the drawings in the description Figure 1 - the drawings Figure 9 As shown in the drawings, a high-precision circuit board laser drilling processing device comprises:

[0035] The cooling collection mechanism 1 comprises a box 3 with a laser drill 2 inside, an air cylinder 4 fixedly installed at the top end of the box 3, a piston rod at the bottom of the air cylinder 4 penetrating through the box 3 and extending onto a first gear plate 5, a second gear plate 7 horizontally distributed and in meshing transmission with the outer wall of the first gear plate 5 through a rotating gear 6, a first shielding plate 9 fixed on a contact rod 8 installed at one end of the first gear plate 5, and a movable groove connected to the first shielding plate 9 along the height direction of the air inlet;

[0036] The second gear plate 7 top end is connected with a push rod 10 through a support, one end of the push rod 10 is connected with a second shielding plate 11, the top of the second shielding plate 11 abuts and fits on a ventilation pipeline 12 on the top of the inner wall of the box 3, a conical air outlet on the ventilation pipeline 12 is connected in a neutralization reaction tank 14 through a U-shaped pipe 13, and a sampling pipe 15 extending into the box 3 is arranged between the ventilation pipeline 12 and the air cylinder 4.

[0037] Specifically, the sampling pipe 15 is in an open state in a normal working state, the sampling pipe 15 is mainly arranged to facilitate sampling of waste gas generated by the laser beam, thereby facilitating subsequent component analysis, and in a non-working state, the first shielding plate 9 and the second shielding plate 11 can respectively close the air inlet and the sampling pipe 15, thereby sealing the inside of the box 3, thereby effectively preventing dust from entering the laser mechanism.

[0038] When the laser drilling device 2 needs to perform laser drilling on the circuit board, the air cylinder 4 is started and drives the first gear plate 5 to move downward, under the gear meshing transmission, the second gear plate 7 in the horizontal direction moves towards the sampling pipe 15 and closes the sampling pipe 15, and the air inlet of the ventilation pipeline 12 is opened, during the downward movement of the first gear plate 5, the air inlet is opened through the first shielding plate 9, so that the gas in the box 3 can flow normally, and the conical insertion rod 21 in the battery box 16 can be separated from the battery pack 20 through the downward abutting action of the abutting rod 8, thereby supplying power to the electric push rod 23 and the first motor 24, cooperating with the annular groove on the bearing 28, the fan blades 27 can be rotated at different heights to guide the gas into the ventilation pipeline 12, thereby facilitating subsequent filtering and purification work, after the laser operation is completed, the air cylinder 4 drives the first shielding plate 9 to return to the original position and closes the air inlet, cooperating with the sealing cover on the sampling pipe 15, the sealing property of the inside of the processing device can be ensured, thereby achieving the dustproof effect on the workbench 29.

[0039] The horizontal extension end of the first gear plate 5 and the top of the inner wall of the box 3 are connected through an extension rod 47, the extension rod 47 can not only ensure the normal upward and downward movement of the first gear plate 5, but also can support and connect the first gear plate 5, thereby providing corresponding support force to the connecting piece on the first gear plate 5, avoiding the stress load of the structure, thereby affecting the safety and service life of the device.

[0040] The lift rod 17 movably connected to the battery box 16 is arranged right below the abutting rod 8, the bottom of the lift rod 17 penetrates the battery box 16 and extends to the movable block 18, one end of the movable block 18 is connected to the inner wall bottom of the battery box 16 through the compression spring 19, and the other end is connected with the tapered plug rod 21 extending to the gap between the battery pack 20.

[0041] The battery pack 20 is provided with positioning holes arranged on the inner wall of the battery box 16, and the outer sides of the battery pack 20 are provided with protection plates 22 arranged on the inner wall of the battery box 16, the battery pack 20 is installed with the electric push rod 23 and the first motor 24 in an electrically connected manner, the output shaft of the first motor 24 extends to the sleeve 25, the sleeve 25 is movably connected with the telescopic shaft 26, the telescopic shaft 26 is connected with the fan blade 27 arranged on the flow guide groove, and one end of the flow guide groove extends to the ventilation duct 12.

[0042] Specifically, the abutting rod 8 and the lift rod 17 on the battery box 16 are in a movable abutting connection relationship, when the lift rod 17 moves downward under force, the tapered plug rod 21 separates from the battery pack 20 and allows the battery pack 20 to communicate, thereby normally supplying power to the first motor 24 and the electric push rod 23 to start, the compression spring 19 connected to the movable block 18 on the lift rod 17 can play a buffering and adjusting role on the movable lift rod 17, and can also use the elastic recovery effect to reset the moving part, the positioning holes on the battery box 16 can facilitate the installation and connection of the battery pack 20, and the protection plates 22 can also shield and protect the outside of the battery pack 20, thereby further increasing the stability of the battery work.

[0043] The sampling pipe 15 can be sealed and covered by the horizontally moving second shielding plate 11, and the second shielding plate 11 can further increase the closing effect during horizontal movement, and can also open the air outlet of the ventilation duct 12, since impurities attached to the inner wall of the ventilation duct 12 may fall off when the ventilation duct 12 is not in use, a falling groove 46 is arranged on the second shielding plate 11 to facilitate the collection of impurities, and the sampling pipe 15 is cleaned at the pipe opening, thereby effectively ensuring the cleanliness of the inside of the box body 3.

[0044] The first motor 24 can drive the telescopic shaft 26 on the sleeve 25 to rotate, and the telescopic shaft 26 is movably connected inside the sleeve 25, the telescopic shaft 26 has protrusions at both ends, so that the telescopic shaft 26 can rotate and move up and down normally, the protrusions are connected with recesses along the height direction of the inner wall of the sleeve 25, the above-mentioned protrusions and recesses are conventional technical means for those skilled in the art, so no corresponding drawings are shown, but it does not affect the effective implementation of the technical scheme of the present application.

[0045] During the starting process of the electric push rod 23, the upper and lower movements of the telescopic shaft 26 can be driven through the bearing 28, and then the fan blade 27 rotates at different heights to guide the flow, so that the gas can be effectively discharged into the ventilation duct 12. The annular groove on the bearing 28 can prevent the telescopic shaft 26 from deviating during rotation, thereby ensuring the stability of the telescopic shaft 26 during rotation.

[0046] The push rod on the electric push rod 23 is provided with a bearing 28 connected with the telescopic shaft 26, and the outer wall edge of the bearing 28 is provided with an annular groove placed on the telescopic shaft 26. The output shaft of the first motor 24 and the sleeve 25 are fixedly connected through a shaft coupling. The laser drilling device 2 is provided with a workbench 29 placed on the inner wall bottom of the box body 3, and the second motor 30 is fixedly installed on the workbench 29. The output shaft of the second motor 30 extends to the reciprocating screw 31, and the reciprocating screw 31 is connected with a strip-shaped groove placed on the workbench 29 in the length direction. The reciprocating screw 31 is spirally driven with the clamping plates 32 moving in opposite directions at both ends. The clamping plates 32 are movably connected to the slide grooves near the center of the workbench 29, and the side plates 33 are symmetrically arranged on both sides of the workbench 29.

[0047] During the starting process of the second motor 30, the clamping plates 32 at both ends can be moved to a specified distance, and the side plates 33 can be connected through the adjusting bolt locking and fastening during the movement of the slide groove. Thus, the clamping plates 32 at both ends can adaptively clamp and fix circuit boards of different sizes, thereby avoiding shaking during laser processing and effectively ensuring the accuracy of circuit board processing and improving product quality.

[0048] In extension, the second motor 30 can also drive the rotation of the reciprocating screw 31 through the handle. Since the reciprocating screw 31 has good self-locking property under the action of spiral transmission, the clamping plates 32 can effectively limit and clamp the circuit board. The strip-shaped groove on the workbench 29 can also limit and guide the movement of the clamping plates 32, thereby ensuring the normal movement of the clamping plates 32.

[0049] Specific, U type pipe 13 is connected with the filter assembly 34 extending to the neutralization reaction tank 14, filter assembly 34 includes fixed on the U type pipe 13 filter box 35, filter box 35 on the movable limit connection with pull plate 36, pull plate 36 one end integral connection with handle 37, the opposite end is connected with the filter plate 38 placed in the filter box 35, filter plate 38 on the filter hole 39 is set through its inside, filter plate 38 both ends are integrally connected with the convex part, the convex part top close to pull plate 36 on the third gear plate 40, third gear plate 40 close to the filter box 35 inner wall on the sealing groove, and the third gear plate 40 top meshing transmission has intermittent gear 41, the first rotation shaft 42 and the second rotation shaft 43 on the intermittent gear 41 are transmission connected through the conveyor belt 44, the second rotation shaft 43 outer wall fixedly connected with rotating plate 45, filter box 35 inner wall is provided with receiving opening connected with rotating plate 45, with the rotation of the first rotation shaft 42, rotating plate 45 and filter plate 38 top each other movable resistance or separation.

[0050] The filter plate 38 on the filter assembly 34 can filter the particulate impurities, when the filter plate 38 is pulled by the handle 37, the rotating plate 45 on the second rotation shaft 43 is attached to the top of the filter plate 38 under the gear meshing transmission, so that the particulate matter can be swept to a place on the filter plate 38, thereby facilitating the subsequent cleaning work, in addition, the filter plate 38 is inserted into the filter box 35, the rotating plate 45 can be returned under the action of gear meshing transmission, and falls into the receiving opening, avoiding affecting the normal filtration of waste gas, and using intermittent gear 41 can avoid the normal rotation of rotating plate 45 hindered by too large rotation angle, and can reduce the energy consumption of meshing transmission, reduce the resistance, thereby facilitating the operation of personnel.

[0051] In addition, the second shielding plate 11 is provided with a blanking groove 46, and the second shielding plate 11 is connected with the ventilation duct 12 and the sampling pipe 15, and the size of the second shielding plate 11 is matched with the size of the ventilation duct 12 and the sampling pipe 15. The second shielding plate 11 is connected in a matched manner to effectively block the size of the pipe opening of the ventilation duct 12 and the sampling pipe 15, thereby playing the corresponding roles of collecting impurities and sealing protection.

[0052] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

[0053] The preferred embodiments of the application disclosed above are only to facilitate the elucidation of the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments. Obviously, many modifications and variations can be made in light of the teachings above. The description is chosen and described in order to provide the best illustration of the application and its practical application to those skilled in the art and to enable those skilled in the art to best utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A high-precision laser drilling device for circuit boards, characterized in that, Include: The cooling collection mechanism (1) includes the box (3) provided with laser drill (2) inside, the cylinder (4) is fixedly installed at the top of the box (3), the piston rod at the bottom of the cylinder (4) penetrates the box (3) and extends to the first gear plate (5), the first gear plate (5) outer wall is driven by the second gear plate (7) of horizontal distribution through the meshing transmission of rotating gear (6), the first gear plate (5) one end extension is installed with the first baffle (9) fixed on the contact rod (8), the first baffle (9) is connected with the movable slot along the air inlet height direction; The second gear plate (7) top is connected with the push rod (10) through the support, the push rod (10) one end is connected with the second baffle (11), the second baffle (11) top is in contact with the ventilation duct (12) on the inner wall top of the box (3), the tapered air outlet on the ventilation duct (12) is connected in the neutralization reaction tank (14) through the U-shaped pipe (13), and the ventilation duct (12) and the cylinder (4) are provided with the sampling tube (15) placed in the extension to the inside of the box (3); The U-shaped pipe (13) is connected with the filter assembly (34) extending into the neutralization reaction tank (14), the filter assembly (34) includes the filter box (35) fixed on the U-shaped pipe (13), the pull-out plate (36) is movably connected on the filter box (35), the pull-out plate (36) one end is integrally connected with the handle (37), the opposite end is connected with the filter plate (38) placed in the filter box (35), the filter plate (38) is provided with the filter hole (39) penetrating the inside thereof; The filter plate (38) both ends are integrally connected with the protruding part, the protruding part top is connected with the third gear plate (40) near the pull-out plate (36), the third gear plate (40) is connected with the sealing groove near the inner wall of the filter box (35), and the top of the third gear plate (40) is meshingly driven by the intermittent gear (41), the first rotating shaft (42) and the second rotating shaft (43) on the intermittent gear (41) are drivingly connected through the conveying belt (44), the second rotating shaft (43) outer wall is fixedly connected with the rotating plate (45), the inner wall of the filter box (35) is provided with the receiving opening connected with the rotating plate (45), with the rotation of the first rotating shaft (42), the rotating plate (45) and the filter plate (38) top are movably contacted or separated.

2. The high-precision laser drilling apparatus for a circuit board according to claim 1, wherein The contact rod (8) is provided with the lifting rod (17) movably connected on the battery box (16) below, the lifting rod (17) bottom penetrates the battery box (16) and extends to the movable block (18), the movable block (18) one end is connected on the inner wall bottom of the battery box (16) through the compression spring (19), the opposite end is connected with the tapered plug rod (21) extending to the gap between the battery pack (20).

3. The high-precision laser drilling apparatus for a circuit board according to claim 2, wherein The battery pack (20) is provided with positioning holes arranged on the inner wall of the battery box (16), and the outer sides of the battery pack (20) are provided with protection plates (22) arranged on the inner wall of the battery box (16), the battery pack (20) is installed with an electric push rod (23) and a first motor (24) in an electrically connected manner, the output shaft of the first motor (24) extends to a sleeve (25), the sleeve (25) is provided with a flexible shaft (26) connected movably, the flexible shaft (26) is connected with a fan blade (27) arranged on a flow guide groove, and one end of the flow guide groove extends to the ventilation duct (12).

4. The high-precision laser drilling apparatus for a circuit board according to claim 3, wherein The electric push rod (23) is provided with a bearing (28) connected with the flexible shaft (26), the outer wall edge of the bearing (28) is provided with an annular groove arranged on the flexible shaft (26), and the output shaft of the first motor (24) and the sleeve (25) are fixedly connected through a shaft coupling.

5. The high-precision laser drilling apparatus for a circuit board according to claim 4, wherein The laser drilling device (2) is provided with a workbench (29) arranged on the inner wall bottom of the box body (3), the workbench (29) is fixedly installed with a second motor (30), the output shaft of the second motor (30) extends to a reciprocating screw (31), the reciprocating screw (31) is connected with a strip-shaped groove arranged on the workbench (29) in the length direction, and the reciprocating screw (31) is spirally driven with reversely moving clamping plates (32) at both ends, the clamping plates (32) are provided with sliding grooves near the center of the workbench (29) in the length direction, the sliding grooves are movably connected with side plates (33) symmetrical to the center of the workbench (29), and the side plates (33) and the clamping plates (32) are connected in a manner that the side plates (33) and the clamping plates (32) are connected through the adjusting bolts in a locking and fastening manner.

6. The high-precision laser drilling apparatus for a circuit board according to claim 1, wherein The second shielding plate (11) is provided with a blanking groove (46), and the second shielding plate (11) is connected with the ventilation duct (12) and the sampling pipe (15) in a size matching manner.

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