Punching device and method for circuit board production

Abstract

The present application relates to the field of circuit board processing, and discloses a punching device and method for circuit board production.The problem to be solved by the present application is that after the punching device finishes punching the circuit board, burrs exist on the surface of the formed hole, and the existing punching device does not have the function of polishing the burrs on the surface of the formed hole, so that a hole polishing process needs to be added subsequently, thereby affecting the efficiency of circuit board processing.The present application is composed of a polishing mechanism and a lock catch mechanism.The punching device for circuit board production moves the outer pipe into the drilling hole through the slow extension of the electric telescopic rod.When the bearing touches the circuit board, it drives the wedge block to extrude one end of the L-shaped rod, thereby releasing the restriction of one end of the L-shaped rod inside the outer pipe on the upper slide pipe.Under the reset force of the compression spring, the upper slide pipe moves downward, and under the action of the tooth plate and the transmission gear, the two groups of polishing blocks move towards each other and are attached to the hole, thereby facilitating the subsequent polishing of the circuit board hole.

Description

Technical Field

[0001] This invention relates to the field of circuit board processing, specifically to a drilling device and method for circuit board production. Background Technology

[0002] After existing drilling equipment completes the drilling of circuit boards, some burrs will remain on the surface of the formed holes. However, the existing drilling equipment does not have the function of polishing the burrs on the surface of the formed holes, which requires an additional hole polishing process, thus affecting the efficiency of circuit board processing. Summary of the Invention

[0003] The purpose of this invention is to provide a drilling device and method for circuit board production, to solve the problem mentioned in the background art that after existing drilling devices complete drilling on circuit boards, some burrs remain on the surface of the formed holes. Existing drilling devices do not have the function of polishing these burrs, requiring a subsequent hole polishing process, which affects the efficiency of circuit board processing. To achieve the above objective, this invention provides the following technical solution: a drilling device for circuit board production, including a mounting base, an electric telescopic rod fixedly connected to the mounting base, a drive motor fixedly connected to the lower end of the electric telescopic rod, a polishing mechanism fixedly mounted on the lower end of the drive motor, and a locking mechanism fixedly mounted on the polishing mechanism, the operation of the polishing mechanism being controlled by the locking mechanism;

[0004] A drill bit is fixedly installed on the lower end of the grinding mechanism.

[0005] Preferably, the grinding mechanism includes an outer tube fixed to the lower end of the drive motor, and the lower end of the outer tube is fixedly connected to the drill bit. The outer tube has four rectangular openings on its side, and the four rectangular openings are evenly distributed in a ring.

[0006] An inner tube is fixedly connected to the inner wall of the outer tube, and the inner tube is located on the central axis of the outer tube. Four limiting grooves are equally spaced and arranged in a ring on the inner tube. A rectangular opening is opened in each of the four limiting grooves, and two "+" plates are slidably arranged in the four rectangular openings. Sliding tubes are fixedly connected to the four ends of the "+" plates, and the sliding tubes are slidably sleeved on the outside of the inner tube.

[0007] A compression spring is fixedly connected to one end of each of the two sliding tubes facing away from each other. The compression spring is sleeved on the outside of the inner tube, and the end of the compression spring away from the sliding tube is fixed to the outer wall of the inner tube. Four first spring compression rods are fixedly connected to one side of each of the two sliding tubes facing away from each other, and the four first spring compression rods are slidably arranged in four limiting grooves respectively.

[0008] Two hinge plates are hinged to the outer tube of the first spring compression rod. The two hinge plates are arranged in parallel. A grinding block is hinged to the end of the two hinge plates away from the outer tube of the first spring compression rod. The grinding block slides on the inner wall of the rectangular opening. A spring telescopic rod is hinged between the grinding block and the outer tube of the first spring compression rod, and the spring telescopic rod is arranged at an angle.

[0009] Preferably, the grinding block is arc-shaped, and a grinding arc surface and a pressing arc surface are provided on the side of the grinding block facing away from the inner tube.

[0010] Preferably, a transmission gear is rotatably connected to the middle of the inner wall of the inner tube, and two toothed plates mesh with each of the transmission gears, with the two toothed plates respectively fixedly connected to two cross plates.

[0011] Preferably, the locking mechanism includes a bearing sleeved on the outside of the outer tube, and an annular rubber pad is adhered to the bottom end of the outer ring of the bearing;

[0012] Four second spring compression rods are fixedly connected in a ring at equal intervals on the inner ring of the bearing. A limit sleeve is movably sleeved on the outer sleeve of the second spring compression rod, and the limit sleeve is fixed on the outer wall of the outer tube.

[0013] A helical spring is movably sleeved on the outer side of the outer sleeve of the second spring compression rod. One end of the helical spring is fixed on the outer wall of the outer sleeve of the second spring compression rod, and the other end of the helical spring is fixed on the limiting sleeve.

[0014] The upper end of the second spring compression rod is fixedly connected to a wedge-shaped block, and an L-shaped rod abuts against the inclined surface of the wedge-shaped block. The crossbar of the L-shaped rod passes through the outer wall of the outer tube. Both sides of the L-shaped rod are fixedly connected to a return spring telescopic rod, and the end of the return spring telescopic rod away from the L-shaped rod is fixed to the outer wall of the limiting sleeve.

[0015] Preferably, the locking mechanism further includes a ring sleeve fixedly sleeved on the second spring compression rod, a third spring telescopic rod hinged to the outer wall of the ring sleeve, and a T-shaped extrusion plate hinged to the end of the third spring telescopic rod away from the ring sleeve, the T-shaped extrusion plate damping through the outer tube;

[0016] The T-shaped extrusion plate has a beveled surface at one end inside the outer tube, and the T-shaped extrusion plate abuts against the slide tube through the beveled surface.

[0017] Preferably, both ends of the L-shaped rod are bevels.

[0018] Preferably, the method of using the drilling device for circuit board production includes the following steps:

[0019] S1: Fix the circuit board that needs to be drilled on the mounting base, then drive the drill bit to rotate through the drive motor, and extend it under the action of the electric telescopic rod to move the drill bit down to fit on the circuit board, thereby drilling holes in the circuit board;

[0020] S2: After the drill bit breaks through the circuit board, as the electric telescopic rod slowly extends, it moves the outer tube into the drill hole. When the bearing touches the circuit board, as the electric telescopic rod continues to extend, the second spring compression rod on the bearing slides in the ring, pushing the wedge block to squeeze one end of the L-shaped rod, causing the L-shaped rod to move away from the outer tube. This releases the restriction of the upper slide tube on the inner side of the L-shaped rod. At this time, the upper slide tube moves down under the restoring force of the compression spring. When the upper slide tube moves down, the toothed plate on its inner "+" plate drives the transmission gear to rotate, thereby driving the lower slide tube to move up synchronously on the inner tube, causing the two sets of grinding blocks on the opposite side of the two slide tubes to move towards each other.

[0021] S3: When the grinding block on the slide tube moves down inside the rectangular opening, the grinding block moves out of the rectangular opening under the action of the spring telescopic rod's restoring force, so that it slides inside the rectangular opening and fits against the hole in the circuit board.

[0022] Furthermore, when the second spring compression rod moves upward, it drives the third spring telescopic rod to compress, pushing the T-shaped extrusion plate to slide slowly on the outer tube, so that the T-shaped extrusion plate presses against the slide tube, maintaining the pressure of the grinding arc on the grinding block on the circuit board. As the drive motor rotates, it drives the grinding arc of the grinding block to grind the holes on the circuit board.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] In this invention, after the circuit board is drilled through by the drill bit, the outer tube moves into the drill hole as the electric telescopic rod slowly extends. When the bearing contacts the circuit board, the second spring compression rod on the bearing slides in the ring as the electric telescopic rod continues to extend, pushing the wedge block to squeeze one end of the L-shaped rod, causing the L-shaped rod to move away from the outer tube. This releases the restriction of the upper slide tube on the inner side of the L-shaped rod. At this time, the upper slide tube moves down under the restoring force of the compression spring. When the upper slide tube moves down, the toothed plate on its inner "+" plate drives the transmission gear to rotate, thereby driving the lower slide tube to move up synchronously on the inner tube. This causes the two sets of grinding blocks on opposite sides of the two slide tubes to move towards each other and fit into the hole, which facilitates subsequent grinding of the circuit board hole.

[0025] In this invention, when the grinding block on the slide tube moves downward within the rectangular opening, it moves out of the rectangular opening under the restoring force of the spring telescopic rod, allowing it to slide within the rectangular opening and conform to the hole in the circuit board. When the second spring compression rod moves upward, it drives the third spring telescopic rod to compress, pushing the T-shaped extrusion plate to slide slowly on the outer tube. This causes the T-shaped extrusion plate to press against the slide tube, maintaining the pressure of the grinding arc on the grinding block against the circuit board, thus ensuring the quality of subsequent grinding of the hole in the circuit board by the grinding arc of the grinding block.

[0026] In this invention, after the hole is polished by the polishing block, the outer tube is moved upward by the retraction of the electric telescopic rod, which in turn causes the lower polishing block to passively press the circuit board. This causes the lower polishing block to move downward within the rectangular opening, and in conjunction with the transmission gear, it drives the upper slide tube to move upward. By moving the upper slide tube upward, the L-shaped rod is pressed outward from the outer tube and then reset, thus locking the upper slide tube after it has moved upward, completing the retraction and reset of the polishing block. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a three-dimensional structural diagram of the drive motor and grinding mechanism of the present invention;

[0029] Figure 3 This is a three-dimensional structural diagram of the grinding mechanism and locking mechanism of the present invention;

[0030] Figure 4 This is a three-dimensional cross-section of the outer tube of the present invention. Figure 1 ;

[0031] Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the middle;

[0032] Figure 6 This is a three-dimensional cross-section of the outer tube of the present invention. Figure 2 ;

[0033] Figure 7 For the present invention Figure 6 Enlarged view of the structure at point B in the middle;

[0034] Figure 8 This is a three-dimensional structural diagram of the inner tube and sliding tube of the present invention;

[0035] Figure 9 This is a three-dimensional cross-sectional view of the inner tube of the present invention.

[0036] In the diagram: 1. Mounting base; 2. Electric telescopic rod; 3. Drive motor; 4. Grinding mechanism; 41. Outer tube; 42. Inner tube; 43. Limiting groove; 44. Rectangular opening; 45. Cross plate; 46. Slide tube; 47. Compression spring; 48. First spring compression rod; 49. Hinge plate; 410. Grinding block; 411. Spring telescopic rod; 412. Grinding arc surface; 413. Extrusion arc surface; 414. Rectangular opening; 415. Transmission gear; 416. Tooth plate; 5. Locking mechanism; 51. Bearing; 52. Annular rubber pad; 53. Second spring compression rod; 54. Limiting sleeve; 55. Helical spring; 56. Wedge block; 57. L-shaped rod; 58. Return spring telescopic rod; 59. Third spring telescopic rod; 510. T-shaped extrusion plate; 511. Ring sleeve; 6. Drill bit. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1 to 9 This invention provides a technical solution: a drilling device for circuit board production, including a mounting base 1, a clamp for fixing the circuit board on the mounting base 1, an electric telescopic rod 2 fixedly connected to the mounting base 1, longitudinal slide rails installed on both sides of the top surface of the mounting base 1, transverse slide rails installed on the two longitudinal slide rails, and the electric telescopic rod 2 installed on the transverse slide rails. The sliding of the electric telescopic rod 2 is controlled by the cooperation of the longitudinal slide rails and the transverse slide rails, thereby changing the position of the electric telescopic rod 2. A drive motor 3 is fixedly connected to the lower end of the electric telescopic rod 2, a grinding mechanism 4 is fixedly installed on the lower end of the drive motor 3, and a locking mechanism 5 is fixedly installed on the grinding mechanism 4. The operation of the grinding mechanism 4 is controlled by the locking mechanism 5.

[0039] A drill bit 6 is fixedly installed on the lower end of the grinding mechanism 4.

[0040] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the grinding mechanism 4 includes an outer tube 41 fixed to the lower end of the drive motor 3, and the lower end of the outer tube 41 is fixedly connected to the drill bit 6. Four rectangular openings 414 are provided on the side of the outer tube 41, and the four rectangular openings 414 are distributed in a ring at equal distances. Spring telescopic plates are fixedly connected to the upper and lower sides of the inner wall of the rectangular opening 414. The size of the opening of the rectangular opening 414 is reduced by the spring telescopic plates, thereby reducing the amount of debris entering the rectangular opening 414.

[0041] An inner tube 42 is fixedly connected to the inner wall of the outer tube 41, and the inner tube 42 is located on the central axis of the outer tube 41. Four limiting grooves 43 are equally spaced in a ring on the inner tube 42. A rectangular opening 44 is opened in each of the four limiting grooves 43, and two cross plates 45 are slidably arranged in the four rectangular openings 44. Sliding tubes 46 are fixedly connected to the four ends of the cross plates 45, and the sliding tubes 46 are slidably sleeved on the outside of the inner tube 42.

[0042] A compression spring 47 is fixedly connected to one end of each of the two slide tubes 46 facing away from each other. The compression spring 47 is sleeved on the outside of the inner tube 42, and the end of the compression spring 47 away from the slide tube 46 is fixed to the outer wall of the inner tube 42. Four first spring compression rods 48 are fixedly connected to one side of each of the two slide tubes 46 facing away from each other, and the four first spring compression rods 48 are slidably arranged in four limiting slide grooves 43 respectively.

[0043] Two hinge plates 49 are hinged to the outer sleeve of the first spring compression rod 48. The two hinge plates 49 are arranged in parallel. A grinding block 410 is hinged to the end of the two hinge plates 49 away from the outer sleeve of the first spring compression rod 48. The grinding block 410 slides on the inner wall of the rectangular opening 414. A spring telescopic rod 411 is hinged between the grinding block 410 and the outer sleeve of the first spring compression rod 48, and the spring telescopic rod 411 is arranged at an angle.

[0044] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the grinding block 410 is arc-shaped, and a grinding arc surface 412 and a pressing arc surface 413 are provided on the side of the grinding block 410 facing away from the inner tube 42, and the two pressing arc surfaces 413 face the two ends of the inner tube 42 respectively.

[0045] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8, Figure 9 As shown, a transmission gear 415 is rotatably connected to the middle of the inner wall of the inner tube 42. Two toothed plates 416 mesh with each of the transmission gears 415, and the two toothed plates 416 are respectively fixedly connected to two cross plates 45.

[0046] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the locking mechanism 5 includes a bearing 51 sleeved on the outside of the outer tube 41, and an annular rubber pad 52 is glued to the bottom end of the outer ring of the bearing 51.

[0047] Four second spring compression rods 53 are fixedly connected in a ring at equal intervals on the inner ring of the bearing 51. A limit sleeve 54 is movably sleeved on the outer sleeve of the second spring compression rod 53, and the limit sleeve 54 is fixed on the outer wall of the outer tube 41.

[0048] A helical spring 55 is movably sleeved on the outer side of the outer sleeve of the second spring compression rod 53. One end of the helical spring 55 is fixed on the outer wall of the outer sleeve of the second spring compression rod 53, and the other end of the helical spring 55 is fixed on the limiting sleeve 54.

[0049] The upper end of the second spring compression rod 53 is fixedly connected to a wedge block 56. The inclined surface of the wedge block 56 abuts against an L-shaped rod 57. Both ends of the L-shaped rod 57 are inclined surfaces, and the horizontal bar of the L-shaped rod 57 passes through the outer wall of the outer tube 41. Both sides of the L-shaped rod 57 are fixedly connected to a return spring telescopic rod 58, and the end of the return spring telescopic rod 58 away from the L-shaped rod 57 is fixed to the outer wall of the limiting sleeve 54.

[0050] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the locking mechanism 5 also includes a ring sleeve 511 fixedly sleeved on the second spring compression rod 53. A third spring telescopic rod 59 is hinged on the outer wall of the ring sleeve 511. A T-shaped extrusion plate 510 is hinged on the end of the third spring telescopic rod 59 away from the ring sleeve 511. The T-shaped extrusion plate 510 damping passes through the outer tube 41.

[0051] The T-shaped extrusion plate 510 has a beveled surface at one end inside the outer tube 41, and the T-shaped extrusion plate 510 abuts against the slide tube 46 through the beveled surface.

[0052] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, both ends of the L-shaped rod 57 are inclined surfaces.

[0053] The method of use and advantages of the present invention: The method of using the drilling device for circuit board production, the working process is as follows:

[0054] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown:

[0055] S1: Fix the circuit board that needs to be drilled on the mounting base 1, and then drive the drill bit 6 to rotate through the drive motor 3. Under the action of the electric telescopic rod 2, the drill bit 6 is extended and moved down to fit on the circuit board, thereby drilling holes in the circuit board.

[0056] S2: After the drill bit 6 breaks through the circuit board, as the electric telescopic rod 2 slowly extends, it drives the outer tube 41 to move into the drill hole. When the bearing 51 touches the circuit board, as the electric telescopic rod 2 continues to extend, the second spring compression rod 53 on the bearing 51 slides in the ring 511, pushing the wedge block 56 to squeeze one end of the L-shaped rod 57, causing the L-shaped rod 57 to move away from the outer tube 41, thereby releasing the restriction of the upper slide tube 46 on the inner side of the L-shaped rod 57. At this time, the upper slide tube 46 moves down under the restoring force of the compression spring 47, and when the upper slide tube 46 moves down, it drives the transmission gear 415 to rotate through the toothed plate 416 on the inner "+" plate 45, thereby driving the lower slide tube 46 to move up synchronously on the inner tube 42, causing the two sets of grinding blocks 410 on the opposite side of the two slide tubes 46 to move towards each other.

[0057] S3: When the grinding block 410 on the slide tube 46 moves down in the rectangular opening 414, the grinding block 410 moves out of the rectangular opening 414 under the action of the spring telescopic rod 411's restoring force, so that it slides in the rectangular opening 414 and fits against the hole in the circuit board.

[0058] Furthermore, when the second spring compression rod 53 moves upward, it drives the third spring telescopic rod 59 to compress, pushing the T-shaped extrusion plate 510 to slowly slide on the outer tube 41, so that the T-shaped extrusion plate 510 presses on the slide tube 46, maintaining the pressure of the grinding arc surface 412 on the grinding block 410 on the circuit board. As the drive motor 3 rotates, it drives the grinding arc surface 412 of the grinding block 410 to grind the holes in the circuit board.

[0059] After the grinding block 410 finishes grinding the hole, the electric telescopic rod 2 retracts, causing the outer tube 41 to move upward, which in turn causes the lower grinding block 410 to passively squeeze the circuit board, thus compressing the lower first spring compression rod 48; and as the outer tube 41 moves upward, the second spring compression rod 53 moves downward under the action of the helical spring 55, causing the wedge block 56 to separate from one end of the L-shaped rod 57, and when the second spring compression rod 53 moves downward, it pulls the T-shaped extrusion plate 510 and the upper slide tube 46 through the third spring telescopic rod 59.

[0060] Then, as the lower grinding block 410 moves down within the rectangular opening 414, it drives the transmission gear 415 to rotate, causing the upper grinding block 410 and the slide tube 46 to move up synchronously. When the grinding block 410 touches the inner wall of the rectangular opening 414, it squeezes the rectangular opening 414 through the extrusion arc surface 413, causing the grinding block 410 to retract into the outer tube 41.

[0061] Furthermore, when the two sets of grinding blocks 410 move in opposite directions and retract into the outer tube 41, the upper grinding block 410, in conjunction with the first spring compression rod 48, pushes the slide tube 46 upward, squeezes the L-shaped rod 57 to move outward from the outer tube 41 and then resets, locking the upper slide tube 46 after it has moved upward, thus completing the retraction and reset of the grinding block 410. Then, the electric telescopic rod 2 continues to retract, pulling the drill bit 6 out of the hole in the circuit board.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drilling device for circuit board production, comprising a mounting base (1), characterized in that: An electric telescopic rod (2) is fixedly connected to the mounting base (1). A drive motor (3) is fixedly connected to the lower end of the electric telescopic rod (2). A grinding mechanism (4) is fixedly installed on the lower end of the drive motor (3). A locking mechanism (5) is fixedly installed on the grinding mechanism (4). The grinding mechanism (4) is controlled to run by the locking mechanism (5). A drill bit (6) is fixedly installed on the lower end of the grinding mechanism (4); The grinding mechanism (4) includes an outer tube (41) fixed on the lower end of the drive motor (3), and the lower end of the outer tube (41) is fixedly connected to the drill bit (6). The outer tube (41) has four rectangular openings (414) on its side, and the four rectangular openings (414) are evenly distributed in a ring. An inner tube (42) is fixedly connected to the inner wall of the outer tube (41), and the inner tube (42) is located on the central axis of the outer tube (41). Four limiting grooves (43) are equally spaced in a ring on the inner tube (42). A rectangular opening (44) is opened in each of the four limiting grooves (43), and two cross plates (45) are slidably arranged in the four rectangular openings (44). Sliding tubes (46) are fixedly connected to the four ends of the cross plates (45), and the sliding tubes (46) are slidably sleeved on the outside of the inner tube (42). A compression spring (47) is fixedly connected to one end of each of the two slide tubes (46) facing away from each other. The compression spring (47) is sleeved on the outside of the inner tube (42), and the end of the compression spring (47) away from the slide tube (46) is fixed to the outer wall of the inner tube (42). Four first spring compression rods (48) are fixedly connected to one side of each of the two slide tubes (46), and the four first spring compression rods (48) are slidably arranged in four limiting slide grooves (43). Two hinge plates (49) are hinged to the outer tube of the first spring compression rod (48). The two hinge plates (49) are arranged in parallel. A grinding block (410) is hinged to one end of the two hinge plates (49) away from the outer tube of the first spring compression rod (48). The grinding block (410) slides on the inner wall of the rectangular opening (414). A spring telescopic rod (411) is hinged between the grinding block (410) and the outer tube of the first spring compression rod (48), and the spring telescopic rod (411) is inclined. The locking mechanism (5) includes a bearing (51) sleeved on the outside of the outer tube (41), and an annular rubber pad (52) is attached to the bottom end of the outer ring of the bearing (51). The inner ring of the bearing (51) is fixedly connected with four second spring compression rods (53) in a ring at equal intervals. The outer sleeve of the second spring compression rod (53) is movably sleeved with a limiting sleeve (54), which is fixed on the outer wall of the outer tube (41). A helical spring (55) is movably sleeved on the outer side of the outer sleeve of the second spring compression rod (53). One end of the helical spring (55) is fixed on the outer wall of the outer sleeve of the second spring compression rod (53), and the other end of the helical spring (55) is fixed on the limiting sleeve (54). The upper end of the second spring compression rod (53) is fixedly connected to a wedge block (56), and the inclined surface of the wedge block (56) abuts against an L-shaped rod (57). The crossbar of the L-shaped rod (57) passes through the outer wall of the outer tube (41). Both sides of the L-shaped rod (57) are fixedly connected to a return spring telescopic rod (58), and the end of the return spring telescopic rod (58) away from the L-shaped rod (57) is fixed to the outer wall of the limiting sleeve (54). The locking mechanism (5) further includes a ring sleeve (511) fixedly sleeved on the second spring compression rod (53), a third spring telescopic rod (59) is hinged on the outer wall of the ring sleeve (511), and a T-shaped extrusion plate (510) is hinged on the end of the third spring telescopic rod (59) away from the ring sleeve (511), and the T-shaped extrusion plate (510) damping passes through the outer tube (41); The T-shaped extrusion plate (510) has a beveled surface at one end inside the outer tube (41), and the T-shaped extrusion plate (510) abuts against the slide tube (46) through the beveled surface.

2. The drilling device for circuit board production according to claim 1, characterized in that: The grinding block (410) is arc-shaped, and a grinding arc surface (412) and a pressing arc surface (413) are provided on the side of the grinding block (410) facing away from the inner tube (42).

3. The drilling device for circuit board production according to claim 2, characterized in that: A transmission gear (415) is rotatably connected to the middle of the inner wall of the inner tube (42). Two toothed plates (416) mesh with each of the transmission gears (415), and the two toothed plates (416) are fixedly connected to two cross plates (45) respectively.

4. The drilling device for circuit board production according to claim 3, characterized in that: Both ends of the L-shaped rod (57) are inclined surfaces.

5. The method of using the drilling device for circuit board production according to claim 4, characterized in that: Includes the following steps: S1: Fix the circuit board that needs to be drilled on the mounting base (1), and then drive the drill bit (6) to rotate through the drive motor (3). Under the action of the electric telescopic rod (2), the drill bit (6) is extended and moved down to fit on the circuit board, thereby drilling holes in the circuit board. S2: After the drill bit (6) breaks through the circuit board, as the electric telescopic rod (2) slowly extends, it drives the outer tube (41) to move into the drill hole. When the bearing (51) comes into contact with the circuit board, as the electric telescopic rod (2) continues to extend, the second spring compression rod (53) on the bearing (51) slides in the ring (511), pushing the wedge block (56) to squeeze one end of the L-shaped rod (57), causing the L-shaped rod (57) to move away from the outer tube (41), thereby releasing the L-shaped rod. The rod (57) is located inside the outer tube (41) and restricts the upper slide tube (46). At this time, the upper slide tube (46) moves down under the restoring force of the compression spring (47). When the upper slide tube (46) moves down, it drives the transmission gear (415) to rotate through the toothed plate (416) on the inner "+" plate (45), which in turn drives the lower slide tube (46) to move up synchronously on the inner tube (42), causing the two sets of grinding blocks (410) on the opposite side of the two slide tubes (46) to move towards each other. S3: When the grinding block (410) on the slide tube (46) moves down in the rectangular opening (414), the grinding block (410) moves out of the rectangular opening (414) under the action of the spring telescopic rod (411) reset force, so that it slides in the rectangular opening (414) and fits against the hole in the circuit board. When the second spring compression rod (53) moves upward, it drives the third spring telescopic rod (59) to compress, pushing the T-shaped extrusion plate (510) to slowly slide on the outer tube (41), so that the T-shaped extrusion plate (510) is pressed on the slide tube (46), maintaining the pressure of the grinding arc surface (412) on the grinding block (410) on the circuit board. As the drive motor (3) rotates, it drives the grinding arc surface (412) of the grinding block (410) to grind the holes of the circuit board.

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