Drilling machine provided with deburring and chamfering structure and used for processing circuit board

Abstract

The invention discloses a drilling machine provided with a deburring and chamfering structure and used for circuit board processing, and relates to the field of circuit board processing, the drilling machine comprises a base, a mounting seat, an expansion piece and a drilling mechanism, the mounting seat is fixed above the base, the expansion piece is arranged below the mounting seat, the drilling mechanism is connected below the expansion piece, and the drilling mechanism is connected below the expansion piece. And the drilling mechanism comprises a connecting seat, a drill bit, a connecting rod and a transmission seat, the connecting seat is installed below the expansion piece, the transmission seat is arranged below the connecting seat, the connecting rod is connected below the transmission seat, and the drill bit is fixed to the lower end of the connecting rod. According to the drilling machine provided with the deburring and chamfering structure and used for circuit board machining, a circuit board is supported through the supporting base, deformation of the circuit board during drilling is avoided, the horizontal positions of the supporting base and the drill bit are not changed, the drill bit and the supporting base are always opposite, the circuit board can be controlled to move through the mounting frame subsequently, the drilling position of the circuit board is adjusted, and the drilling efficiency is improved. And stable proceeding of subsequent drilling is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board processing, in particular to a drilling machine for circuit board processing provided with a deburring and chamfering structure. Background Art

[0002] When processing a circuit board, in order to facilitate the later installation and fixation of the circuit board, it is necessary to open holes on the circuit board and drill the circuit board using a drilling machine. When drilling, the circuit board needs to be positioned, and then the drilling machine is used to control the movement of the drill bit to complete the drilling.

[0003] The application number is CN202311642170.5, and an intelligent circuit board punching device disclosed on April 5, 2024, includes a base, an electric drill module is fixedly provided on the base, a positioning component is slidably connected to the base, a fixing component is slidably connected to the positioning component, a laser module is connected to the base through a support, and the central axis of the laser module coincides with the central axis of the drill bit on the electric drill module, and the fixing component is located between the laser module and the base. The invention arranges a laser module to assist the operator in detecting whether the drill rod is installed vertically when replacing and installing the drill rod, so as to avoid the drill rod being installed non-vertically. During the drilling process, the drill rod has a pulling force, causing the hole diameter to be too large or the drill rod to break. In this way, it is also possible to check in time during the initial drilling whether the drill bit at the laser module has deviated due to the previous work; the application number is CN202311550572.2, and a PCB circuit board processing and punching device disclosed on January 2, 2024, the PCB circuit board processing and punching device includes a frame, a movable platform, a drilling mechanism and a supporting mechanism. The movable platform is arranged on the frame, and is used to drive the circuit board to move horizontally; the drilling mechanism is arranged on the frame, and the drilling mechanism includes a drill bit that can be raised and lowered in the vertical direction, and the drill bit is used to drill the circuit board on the movable platform ; The support mechanism is arranged on the frame, and the support mechanism is located directly below the drill bit, and is used to support the drilling position of the circuit board. The support mechanism is provided with an avoidance hole for avoiding the drill bit. The PCB circuit board processing and punching device can be applied to support different types of circuit boards without adjustment, and there will be no interference between the bearing surface and the drill bit, and the operation is simple; The application number is CN202322121775.1, and a circuit board processing and punching device disclosed on March 12, 2024, includes a device body, and the device body includes a placing table, and the placing table is provided with a slide groove and a support frame, and a support leg is provided under the placing table, and the slide groove is provided with a support leg. A slide rod is provided, a slide block is provided on the outer sleeve of the slide rod, an operation panel is provided on the left side of the operation panel, a pointing needle is provided on the left side of the operation panel, and an extension buckle is provided on the front end of the operation panel, a bidirectional screw rod is provided in the extension buckle, a motor is provided on the left end of the bidirectional screw rod, and a first clamping plate is provided on the bidirectional screw rod, a damping column 1 is provided on the inner side wall of the first clamping plate, and a spring 1 is provided on the outer sleeve of the damping column 1, which can provide buffer protection for the circuit board during the limiting process, so as to avoid the circuit board being squeezed and damaged by the device during the limiting process of the circuit board, and can also control the drilling depth of the drill body, thereby increasing the stability and safety of the device and avoiding the drill bit breaking due to vibration of the drill body during drilling;

[0004] When a current drilling machine is used, the drilling position is generally adjusted by moving the horizontal position of the drill bit. After the drill bit position is adjusted, the circuit board is suspended below the circuit board to provide a moving space for the drill bit. Although the drill bit can flexibly adjust the drilling position in this way, the circuit board is easily deformed and damaged due to the circuit board being suspended below during drilling, and the burrs on the surface of the hole after drilling sometimes need to be further polished, which reduces the drilling quality of the device. Summary of the invention

[0005] The object of the present invention is to provide a drilling machine for circuit board processing provided with a deburring and chamfering structure, so as to solve the problem proposed in the above background technology that the current drilling machine, when in use, generally adjusts the drilling position by moving the horizontal position of the drill bit. After adjusting the drill bit position, the circuit board is suspended below in order to provide a moving space for the drill bit. Although the drill bit can flexibly adjust the drilling position in this way, the circuit board is easily deformed and damaged by the pressure of the drill bit due to the suspension below the circuit board during drilling, and the burrs on the surface of the hole after drilling sometimes need to be further polished.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a drilling machine for circuit board processing with a deburring and chamfering structure, comprising a base, a mounting base, a telescope and a drilling mechanism, wherein the mounting base is fixed above the base, and a telescope is arranged below the mounting base, and a drilling mechanism is connected below the telescope, and the drilling mechanism comprises a connecting seat, a drill bit, a connecting rod and a transmission seat, the connecting seat is installed below the telescope, and a transmission seat is arranged below the connecting seat, and a connecting rod is connected below the transmission seat, and a drill bit is fixed at the lower end of the connecting rod, and the rotation of the drill bit is controlled by the transmission seat, a deburring mechanism is arranged above the drill bit, and a support seat is arranged below the drill bit, and the support seat is fixed above the base for electrical The road plate provides support, an installation frame is provided on the outer side of the support seat, and a positioning seat is provided on the inner side of the installation frame, and a horizontal sliding structure is formed between the positioning seat and the installation frame, a second spring is fixed on the outer side of the positioning seat, and four groups of positioning seats are provided on the inner side of the installation frame, and the bottom of the positioning seat is designed in an "L" shape, the bottom upper surface of the positioning seat is flush with the upper surface of the support seat, a first mounting block is provided on the left and right sides of the installation frame, and a second mounting block is nested on the outer side of the first mounting block, and a telescopic structure is formed between the first mounting block and the second mounting block, a fixed seat is provided on the outer end of the second mounting block, and the fixed seat is fixed above the base, and a front-rear sliding structure is formed between the second mounting block and the fixed seat.

[0007] To further optimize the technical solution, the diameter of the connecting rod is smaller than the diameter of the drill bit, and a docking joint is fixed to the upper end of the connecting rod, a concave-convex matching structure is formed between the docking joint and the transmission seat, and a through opening is opened inside the docking joint, the internal threaded connection of the transmission seat is connected with a locking piece, and the locking piece passes through the through opening to lock the connection between the docking joint and the transmission seat.

[0008] To further optimize the technical solution, the deburring mechanism includes a chamfering grinding block and a slider;

[0009] The chamfering grinding block is sleeved on the outside of the connecting rod, and the upper part of the chamfering grinding block is designed in an inclined structure;

[0010] The slider is fixed on the inner side of the chamfering grinding block, and an up-and-down sliding structure is formed between the slider and the connecting rod.

[0011] To further optimize the technical solution, a protective cover is provided on the outside of the drill bit, and a sliding rod is fixed above the protective cover, and the upper end of the sliding rod passes through the connecting seat and the connecting seat to form an up and down sliding structure, and a first spring is provided on the outside of the sliding rod, and the lower end of the protective cover is located below the drill bit.

[0012] To further optimize the technical solution, the middle portion of the support seat is designed as a through structure, and a debris collection mechanism is provided below the support seat.

[0013] To further optimize the technical solution, the debris collection mechanism includes a connecting cover, a dust collection mechanism and a dust collection bag;

[0014] A connecting cover is fixed below the supporting seat;

[0015] A dust collecting mechanism is installed inside the connecting cover to collect the debris inside the supporting seat;

[0016] The dust bag is detachably installed under the connecting cover, and the dust bag has a breathable structure design.

[0017] To further optimize the technical solution, the first mounting block and the second mounting block are symmetrically arranged front and back about the center line of the mounting frame, and the outer end of the second mounting block is designed in an inverted "L" shape.

[0018] To further optimize the technical solution, a limiting mechanism is disposed inside the first mounting block and inside the second mounting block to limit the movement of the first mounting block in the second mounting block and the movement of the second mounting block in the fixing seat.

[0019] Further optimizing the technical solution, the limiting mechanism includes a first limiting block, a fourth spring, a movable plate, a second limiting block and a control mechanism;

[0020] A first limiting block is arranged at the outer end of the first mounting block, and an up-and-down sliding structure is formed between the first limiting block and the first mounting block;

[0021] A fourth spring, fixed below the first limit block, provides an upward thrust to the first limit block;

[0022] A movable plate is arranged inside the second mounting block and between the second mounting block to form an up-and-down sliding structure, and the movable plate is located above the first limiting block;

[0023] A second limiting block is fixed to the left end of the movable plate, and the upper end of the second limiting block penetrates the upper surface of the second mounting block and is connected to the fixing seat to limit the movement of the second mounting block;

[0024] The control mechanism is connected to the first limiting block to control the movement of the first limiting block and release the limiting effect thereof.

[0025] To further optimize the technical solution, the control mechanism includes a connector, a third spring and a control rope;

[0026] A connector is fixed to the end of the first mounting block, and the connector is located inside the mounting frame and between the mounting frame to form an up-and-down sliding structure;

[0027] A third spring is fixed below the connector to provide an upward thrust to the connector;

[0028] The control rope is fixed below the first limit block, and the inner end of the control rope passes through the connector and is connected to the installation frame.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The support base provides support for the circuit board to prevent deformation of the circuit board during drilling, and the horizontal position of the support base and the drill bit remains unchanged, so that the drill bit and the support base are always relative to each other. The circuit board can be moved and the drilling position of the circuit board can be adjusted through the installation frame, thereby ensuring the stability of subsequent drilling;

[0031] (2) The chamfering block can be used to remove burrs and chamfer the circuit board after drilling, and the chamfering block can rotate with the drill bit. After the drill bit is disassembled, the chamfering block can be removed from the connecting rod, so that the chamfering block can be disassembled and replaced to improve the drilling quality;

[0032] (3) The protective cover can protect the drilling position, and the protective cover can also provide a downward pressure limit effect for the circuit board. The dust collection mechanism in the connection cover can collect the dust generated during the drilling process to avoid pollution to the surrounding working environment caused by drilling;

[0033] (4) The positioning seat can provide support for the circuit board, and the positioning seat can be moved and controlled by the mounting frame to adjust the drilling position of the circuit board, and the mounting frame can be adjusted in position through the sliding connection between the first mounting block and the second mounting block and the second mounting block and the fixing seat;

[0034] (5) The installation frame can be positioned by setting the first limit block and the second limit block, and the first limit block and the second limit block can be controlled to move by lifting the installation frame to release the limiting effect. The circuit board can also be lifted from the support seat to facilitate its movement and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0036] Figure 2 It is a side view structural schematic diagram of the present invention;

[0037] Figure 3 It is a schematic diagram of the three-dimensional structure of the protective cover of the present invention;

[0038] Figure 4 This is a schematic diagram of the main structure of the drill bit of the present invention;

[0039] Figure 5 It is a schematic diagram of the side section structure of the transmission seat of the present invention;

[0040] Figure 6 This is a schematic diagram of the top view of the installation frame of the present invention;

[0041] Figure 7 This is a schematic diagram of the main cross-sectional structure of the support seat of the present invention;

[0042] Figure 8 This is a schematic diagram of the main cross-sectional structure of the second mounting block of the present invention;

[0043] Fig. 9 This is a schematic diagram of the main cross-sectional structure of the first mounting block of the present invention;

[0044] Fig.10 It is a schematic diagram of the side sectional structure of the first mounting block of the present invention.

[0045] In the figure: 1. base; 2. mounting seat; 3. telescope; 4. connecting seat; 5. drill bit; 6. connecting rod; 7. butt joint; 8. transmission seat; 9. through port; 10. locking piece; 11. chamfering grinding block; 12. slider; 13. protective cover; 14. slide bar; 15. first spring; 16. supporting seat; 17. connecting cover; 18. dust suction mechanism; 19. dust bag; 20. mounting frame; 21. positioning seat; 22. second spring; 23. first mounting block; 24. second mounting block; 25. fixing seat; 26. connecting head; 27. third spring; 28. first limit block; 29. ​​fourth spring; 30. control rope; 31. movable plate; 32. second limit block. DETAILED DESCRIPTION

[0046] See also Figure 1-Figure 10 The present invention provides the following technical solution: a drilling machine for processing a circuit board with a deburring and chamfering structure, comprising a base 1, a mounting base 2, a retractor 3 and a drilling mechanism, wherein the mounting base 2 is fixed above the base 1, and the retractor 3 is provided below the mounting base 2, and the drilling mechanism is connected below the retractor 3;

[0047] Embodiment 1:

[0048] The invention provides a technical solution, which discloses a drilling mechanism including a connecting seat 4, a drill bit 5, a connecting rod 6 and a transmission seat 8. The connecting seat 4 is installed below the telescopic device 3, and the transmission seat 8 is arranged below the connecting seat 4, and the connecting rod 6 is connected below the transmission seat 8, and the lower end of the connecting rod 6 is fixed with the drill bit 5, and the rotation of the drill bit 5 is controlled by the transmission seat 8. A deburring mechanism is arranged above the drill bit 5, and a support seat 16 is arranged below the drill bit 5. The support seat 16 is fixed above the base 1 to provide support for the circuit board, and an installation frame 20 is arranged on the outer side of the support seat 16, and a positioning seat 21 is arranged on the inner side of the installation frame 20, and a positioning seat 21 and the installation frame 20 are formed between the positioning seat 21 and the installation frame 20. A horizontal sliding structure is formed, a second spring 22 is fixed on the outer side of the positioning seat 21, and four groups of the positioning seat 21 are arranged on the inner side of the mounting frame 20, and the bottom of the positioning seat 21 is designed in an "L" shape. The bottom upper surface of the positioning seat 21 is flush with the upper surface of the support seat 16, and the left and right sides of the mounting frame 20 are provided with a first mounting block 23, and the outer side of the first mounting block 23 is nested with a second mounting block 24, and a telescopic structure is formed between the first mounting block 23 and the second mounting block 24, and a fixed seat 25 is provided at the outer end of the second mounting block 24, and the fixed seat 25 is fixed above the base 1, and a front-rear sliding structure is formed between the second mounting block 24 and the fixed seat 25;

[0049] When in use, the circuit board to be punched can be placed on the inner side of the positioning seat 21, and the upper part of the positioning seat 21 can be set to an inclined shape to facilitate the swinging of the circuit board. The positioning seat 21 cooperates with the second spring 22 to clamp and position the circuit board. At the same time, the support seat 16 provides support for the drilling position of the circuit board, and then the drill bit 5 is controlled to move downward through the telescopic device 3, and the transmission seat 8 drives the drill bit 5 to rotate to drill the circuit board. When adjusting the drilling position, the positioning seat 21 and the circuit board can be moved by moving the installation frame 20 to adjust the drilling position of the circuit board.

[0050] Embodiment 2:

[0051] On the basis of the first embodiment, the diameter of the connecting rod 6 is smaller than the diameter of the drill bit 5, and a docking joint 7 is fixed on the upper end of the connecting rod 6, a concave-convex matching structure is formed between the docking joint 7 and the transmission seat 8, and a through hole 9 is opened inside the docking joint 7, and the internal thread of the transmission seat 8 is connected with a locking piece 10, and the locking piece 10 passes through the through hole 9 to lock the connection between the docking joint 7 and the transmission seat 8, and the burr mechanism includes a chamfering grinding block 11 and a slider 12, the chamfering grinding block 11 is sleeved on the outer side of the connecting rod 6, and the upper side of the chamfering grinding block 11 is designed in an inclined structure, the slider 12 is fixed on the inner side of the chamfering grinding block 11, and an up and down sliding structure is formed between the slider 12 and the connecting rod 6, and an anti-friction mechanism is provided on the outer side of the drill bit 5. A protective cover 13 is provided, and a slide bar 14 is fixed above the protective cover 13, and the upper end of the slide bar 14 passes through the connecting seat 4 and the connecting seat 4 to form an up-and-down sliding structure, and a first spring 15 is provided on the outer side of the slide bar 14, and the lower end of the protective cover 13 is located below the drill bit 5, and the middle part of the support seat 16 is designed as a through structure, and a debris collection mechanism is provided below the support seat 16, and the debris collection mechanism includes a connecting cover 17, a dust collection mechanism 18 and a dust bag 19, the connecting cover 17 is fixed below the support seat 16, and the dust collection mechanism 18 is installed inside the connecting cover 17 to absorb the debris in the support seat 16, and the dust bag 19 is detachably installed below the connecting cover 17, and the dust bag 19 is designed as a breathable structure;

[0052] When drilling, after the drill bit 5 drills through the circuit board, it continues to drive the chamfering and grinding block 11 to move downward, so that the chamfering and grinding block 11 can deburr and chamfer the hole to improve the quality of the hole, and the chamfering and grinding block 11 keeps synchronous rotation with the drill bit 5 through the slider 12, without the need for an additional power source. When the chamfering and grinding block 11 needs to be disassembled later, the locking piece 10 can be rotated first, and the locking piece 10 can be pulled out of the through port 9, and then the docking joint 7 can be taken out of the transmission seat 8, and then the chamfering and grinding block 11 can be taken out The protective cover 13 can slide out on the connecting rod 6. When drilling, the drill bit 5 contacts the circuit board before the protective cover 13 contacts the circuit board to shield the drilling waste. At the same time, the protective cover 13 provides downward pressure for the circuit board and provides a positioning effect for the circuit board. The waste generated during the drilling process can fall into the dust bag 19 through the connecting cover 17. At the same time, the dust collection mechanism 18 can also be started to generate suction in the support seat 16, so that the waste around the hole can be sucked into the dust bag 19, thereby improving the treatment effect of the waste.

[0053] Embodiment three:

[0054] On the basis of the first embodiment, the first mounting block 23 and the second mounting block 24 are symmetrically arranged front and back about the center line of the mounting frame 20, and the outer end of the second mounting block 24 is designed in an inverted "L" shape. The interior of the first mounting block 23 and the interior of the second mounting block 24 are both provided with a limiting mechanism to limit the movement of the first mounting block 23 in the second mounting block 24 and the movement of the second mounting block 24 in the fixed seat 25. The limiting mechanism includes a first limiting block 28, a fourth spring 29, a movable plate 31, a second limiting block 32 and a control mechanism. The first limiting block 28 is arranged at the outer end of the first mounting block 23, and an up and down sliding structure is formed between the first limiting block 28 and the first mounting block 23. The fourth spring 29 is fixed below the first limiting block 28 to provide an upward thrust for the first limiting block 28. The movable plate 31 is arranged inside the second mounting block 24 and the second mounting block 24 The second limiting block 32 is fixed to the left end of the movable plate 31, and the upper end of the second limiting block 32 passes through the upper surface of the second mounting block 24 and is connected to the fixed seat 25, so as to limit the movement of the second mounting block 24. The control mechanism is connected to the first limiting block 28 to control the movement of the first limiting block 28 and release its limiting effect. The control mechanism includes a connecting head 26, a third spring 27 and a control rope 30. The connecting head 26 is fixed to the end of the first mounting block 23, and the connecting head 26 is located inside the mounting frame 20 and between the mounting frame 20 to form an up and down sliding structure. The third spring 27 is fixed below the connecting head 26 to provide an upward thrust for the connecting head 26. The control rope 30 is fixed below the first limiting block 28, and the inner end of the control rope 30 passes through the connecting head 26 and is connected to the mounting frame 20.

[0055] In the default state, the first limit block 28 and the second limit block 32 are in the extended state. At this time, the position of the installation frame 20 remains stable. When the position of the installation frame 20 and the circuit board needs to be adjusted, the installation frame 20 can be pulled upward first, so that the connector 26 compresses the third spring 27 to move. At the same time, the installation frame 20 will drive the circuit board to move upward through the positioning seat 21, so that it is disconnected from the support seat 16. At the same time, the control rope 30 is pulled, pulling the first limit block 28 to move downward, releasing the first limit block 28 from squeezing the movable plate 31. At the same time, the movable plate 31 will move downward to drive the second limit block 32 to move, releasing the second limit block 3 2 and the fixed seat 25, at this time, the second mounting block 24 can move in the fixed seat 25, and the first mounting block 23 can also move in the second mounting block 24, so that the positions of the mounting frame 20 and the circuit board can be adjusted. After the adjustment is completed, the mounting frame 20 is lowered to move the mounting frame 20 downward, and the circuit board falls onto the support seat 16. At the same time, the pulling effect of the control rope 30 is released, and the first limiting block 28 moves upward under the action of the fourth spring 29, and the movable plate 31 is pushed up, so that the second limiting block 32 extends out, and the positions of the first mounting block 23 and the second mounting block 24 are limited to maintain the stability of the circuit board during subsequent processing.

[0056] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A drilling machine for processing a circuit board provided with a deburring and chamfering structure, comprising a base (1), a mounting base (2), a retractor (3) and a drilling mechanism, wherein the mounting base (2) is fixed above the base (1), the retractor (3) is provided below the mounting base (2), and the drilling mechanism is connected below the retractor (3); Features: The drilling mechanism comprises a connecting seat (4), a drill bit (5), a connecting rod (6) and a transmission seat (8); the connecting seat (4) is installed below the telescopic device (3); a transmission seat (8) is arranged below the connecting seat (4); a connecting rod (6) is connected below the transmission seat (8); a drill bit (5) is fixed at the lower end of the connecting rod (6); the rotation of the drill bit (5) is controlled by the transmission seat (8); a deburring mechanism is arranged above the drill bit (5); a supporting seat (16) is arranged below the drill bit (5); the supporting seat (16) is fixed above the base (1) to provide support for the circuit board; an installation frame (20) is arranged outside the supporting seat (16); a positioning seat (21) is arranged inside the installation frame (20); and a positioning seat (21) and the installation frame (20) are formed between the positioning seat (21) and the installation frame (20). The invention relates to a horizontal sliding structure, wherein a second spring (22) is fixed on the outer side of the positioning seat (21), and four groups of the positioning seat (21) are arranged on the inner side of the mounting frame (20), and the bottom of the positioning seat (21) is designed in an "L"-shaped structure, and the bottom upper surface of the positioning seat (21) is arranged flush with the upper surface of the support seat (16), and the left and right sides of the mounting frame (20) are provided with a first mounting block (23), and the outer side of the first mounting block (23) is nested with a second mounting block (24), and a telescopic structure is formed between the first mounting block (23) and the second mounting block (24), and a fixed seat (25) is arranged at the outer end of the second mounting block (24), and the fixed seat (25) is fixed above the base (1), and a front-rear sliding structure is formed between the second mounting block (24) and the fixed seat (25).

2. A circuit board processing drilling machine with a deburring and chamfering structure according to claim 1, characterized in that: The diameter of the connecting rod (6) is smaller than the diameter of the drill bit (5), and a docking joint (7) is fixed to the upper end of the connecting rod (6), a concave-convex matching structure is formed between the docking joint (7) and the transmission seat (8), and a through opening (9) is opened inside the docking joint (7), and a locking piece (10) is connected to the internal thread of the transmission seat (8), and the locking piece (10) passes through the through opening (9) to lock the connection between the docking joint (7) and the transmission seat (8).

3. A circuit board processing drilling machine with a deburring and chamfering structure according to claim 1 or 2, characterized in that: The deburring mechanism comprises a chamfering grinding block (11) and a sliding block (12); The chamfering grinding block (11) is sleeved on the outer side of the connecting rod (6), and the upper part of the chamfering grinding block (11) is designed to be inclined; The slider (12) is fixed on the inner side of the chamfering grinding block (11), and an up-and-down sliding structure is formed between the slider (12) and the connecting rod (6).

4. A circuit board processing drilling machine with a deburring and chamfering structure according to claim 1, characterized in that: A protective cover (13) is arranged on the outside of the drill bit (5), and a sliding rod (14) is fixed above the protective cover (13), and the upper end of the sliding rod (14) passes through the connecting seat (4) and forms an up-and-down sliding structure between the connecting seat (4), and a first spring (15) is arranged on the outside of the sliding rod (14), and the lower end of the protective cover (13) is located below the drill bit (5).

5. A drilling machine for processing a circuit board with a deburring and chamfering structure according to claim 1 or 4, characterized in that: The middle portion of the support seat (16) is designed as a through structure, and a debris collection mechanism is provided below the support seat (16).

6. A circuit board processing drilling machine with a deburring and chamfering structure according to claim 5, characterized in that: The debris collection mechanism comprises a connecting cover (17), a dust collection mechanism (18) and a dust collection bag (19); A connecting cover (17) is fixed below the supporting base (16); A dust collecting mechanism (18) is installed inside the connecting cover (17) to collect the debris inside the supporting seat (16); The dust collecting bag (19) is detachably mounted below the connecting cover (17), and the dust collecting bag (19) is designed as a breathable structure.

7. A circuit board processing drilling machine with a deburring and chamfering structure according to claim 1, characterized in that: The first mounting block (23) and the second mounting block (24) are symmetrically arranged front and back about the center line of the mounting frame (20), and the outer end of the second mounting block (24) is designed in an inverted "L" shape.

8. A circuit board processing drilling machine with a deburring and chamfering structure according to claim 1 or 7, characterized in that: Limiting mechanisms are provided inside the first mounting block (23) and inside the second mounting block (24) to limit the movement of the first mounting block (23) inside the second mounting block (24) and the movement of the second mounting block (24) inside the fixing seat (25).

9. A circuit board processing drilling machine with a deburring and chamfering structure according to claim 8, characterized in that: The limiting mechanism comprises a first limiting block (28), a fourth spring (29), a movable plate (31), a second limiting block (32) and a control mechanism; A first limiting block (28) is arranged at the outer end of the first mounting block (23), and an up-and-down sliding structure is formed between the first limiting block (28) and the first mounting block (23); A fourth spring (29) is fixed below the first limit block (28) to provide an upward thrust for the first limit block (28); A movable plate (31) is arranged inside the second mounting block (24) and between the second mounting block (24) to form an up-and-down sliding structure, and the movable plate (31) is located above the first limiting block (28); A second limiting block (32) is fixed to the left end of the movable plate (31), and the upper end of the second limiting block (32) passes through the upper surface of the second mounting block (24) and is connected to the fixing seat (25), so as to limit the movement of the second mounting block (24); The control mechanism is connected to the first limiting block (28) to control the movement of the first limiting block (28) and release its limiting effect.

10. A circuit board processing drilling machine with a deburring and chamfering structure according to claim 9, characterized in that: The control mechanism comprises a connecting head (26), a third spring (27) and a control rope (30); A connecting head (26) is fixed to the end of the first mounting block (23), and the connecting head (26) is located inside the mounting frame (20) and between the mounting frame (20) to form an up-and-down sliding structure; A third spring (27) is fixed below the connector (26) to provide an upward thrust for the connector (26); The control rope (30) is fixed below the first limit block (28), and the inner end of the control rope (30) passes through the connector (26) and is connected to the installation frame (20).

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