Perforating device and method for circuit board production

Abstract

The invention relates to the field of circuit board processing. The invention discloses a punching device and method for circuit board production, and aims to solve the problems that after a circuit board is punched by a punching device, burrs exist on the surface of a formed hole, an existing punching device does not have the function of polishing the burrs on the surface of the formed hole, a hole polishing procedure needs to be added subsequently, and the production efficiency is high. And the processing efficiency of the circuit board is influenced. The device is composed of a polishing mechanism and a locking mechanism. According to the punching device for circuit board production, an electric telescopic rod slowly extends to drive an outer pipe to move into a drill hole, when a bearing abuts against a circuit board, a wedge-shaped block is driven to extrude one end of an L-shaped rod, limitation of the end, located on the inner side of the outer pipe, of the L-shaped rod to an upper side sliding pipe is relieved, and at the moment, the upper side sliding pipe moves downwards under the reset force of a compression spring; and under the action of a toothed plate and a transmission gear, the two sets of grinding blocks are promoted to move oppositely to be attached to the interior of the hole, and subsequent grinding of the hole of the circuit board is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of circuit board processing, and in particular to a punching device and method for circuit board production. Background Art

[0002] After the existing punching device completes punching of the circuit board, there will be some burrs on the surface of the formed hole. However, the existing punching device does not have the function of grinding the burrs on the surface of the formed hole, and a subsequent hole grinding process is required, which affects the efficiency of circuit board processing. Summary of the Invention

[0003] The purpose of the present invention is to provide a punching device and method for circuit board production, so as to solve the problem raised in the above background technology that after the existing punching device completes punching of the circuit board, some burrs will appear on the surface of the formed hole, and the existing punching device does not have the function of grinding the burrs on the surface of the formed hole, and a subsequent hole grinding process needs to be added, which affects the efficiency of circuit board processing. In order to achieve the above purpose, the present invention provides the following technical solutions: a punching device for circuit board production, comprising a mounting seat, to which an electric telescopic rod is fixedly connected, to which a driving motor is fixedly connected at the lower end, to which a grinding mechanism is fixedly installed at the lower end of the driving motor, to which a locking mechanism is fixedly installed, and the operation of the grinding mechanism is controlled by the locking mechanism;

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

[0005] Preferably, the grinding mechanism includes an outer tube fixed to the lower end of the driving motor, and the lower end of the outer tube is fixedly connected to the drill bit, and four rectangular openings are opened on the side of the outer tube, and the four rectangular openings are equidistantly distributed in a ring shape;

[0006] The 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 sliding grooves are opened in an annular shape at equal distances on the inner tube. A rectangular opening is opened in each of the four limiting sliding grooves, and two "cross" plates are slidably arranged in the four rectangular openings. The four ends of the "cross" plates are fixedly connected to sliding tubes, and the sliding tubes are slidably sleeved on the outer side of the inner tube.

[0007] A compression spring is fixedly connected to the opposite ends of the two sliding tubes, and the compression spring is sleeved on the outer side 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 the opposite sides of the two sliding tubes, and the four first spring compression rods are respectively slidably arranged in four limiting sliding grooves;

[0008] Two hinged plates are hinged on the outer sleeve of the first spring compression rod, and the two hinged plates are arranged in parallel. A grinding block is hinged on one end of the two hinged plates away from the outer sleeve 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 sleeve 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 an extrusion 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 portion of the inner wall of the inner tube, and two tooth plates are meshed on the transmission gear, and the two tooth plates are fixedly connected to the two "cross" plates respectively.

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

[0012] Four second spring compression rods are fixedly connected to the inner ring of the bearing in an annular shape at equal distances, and a limiting sleeve is movably sleeved on the outer sleeve of the second spring compression rod, and the limiting sleeve is fixed to the outer wall of the outer tube;

[0013] A coil spring is movably sleeved on the outer side of the outer sleeve of the second spring compression rod, one end of the coil spring is fixed to the outer wall of the outer sleeve of the second spring compression rod, and the other end of the coil spring is fixed to the limiting sleeve;

[0014] The upper end of the second spring compression rod is fixedly connected to a wedge block, the inclined surface of the wedge block abuts against an L-shaped rod, and the cross bar of the L-shaped rod passes through the outer wall of the outer tube, and 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 limit sleeve.

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

[0016] An oblique surface is provided on one end of the T-shaped extrusion plate located inside the outer tube, and the T-shaped extrusion plate abuts against the sliding tube through the oblique surface.

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

[0018] Preferably, the method for using the punching device for circuit board production comprises the following steps:

[0019] S1: The circuit board to be drilled is fixed on the mounting base, and then the drill bit is rotated by the driving motor. The electric telescopic rod is extended to drive the drill bit downward to fit on the circuit board, thereby drilling the circuit board;

[0020] S2: After the drill bit drills through the circuit board, the outer tube moves into the drill hole as the electric telescopic rod slowly extends. When the bearing contacts the circuit board, the electric telescopic rod continues to extend, causing the second spring compression rod on the bearing to slide in the ring sleeve, pushing the wedge block to squeeze one end of the L-shaped rod, causing the L-shaped rod to move to the side away from the outer tube, thereby releasing the restriction of the L-shaped rod on the inner end of the outer tube on the upper sliding tube. At this time, the upper sliding tube moves downward under the reset force of the compression spring, and when the upper sliding tube moves downward, the toothed plate on the inner "cross" plate drives the transmission gear to rotate, thereby driving the lower sliding tube to move upward on the inner tube synchronously, causing the two sets of grinding blocks on the opposite sides of the two sliding tubes to move toward each other;

[0021] S3: When the grinding block on the sliding tube moves downward in the rectangular opening, the grinding block moves out of the rectangular opening under the action of the restoring force of the spring telescopic rod, so that it slides in the rectangular opening and fits into the hole of the circuit board;

[0022] When the second spring compression rod moves upward, it drives the third spring telescopic rod to be compressed, pushing the T-shaped extrusion plate to slide slowly on the outer tube, so that the T-shaped extrusion plate is squeezed on the sliding tube, keeping the grinding arc on the grinding block facing the pressure of the circuit board. As the driving motor rotates, the grinding arc of the grinding block is driven to grind the holes in the circuit board.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The cam is then pressed against the outer sleeve of the second slide tube and the outer sleeve is pressed against the outer sleeve by the spring, and the cam is pressed against the outer sleeve by the spring, so that the cam is pressed against the outer sleeve by the spring.

[0025] In the present invention, when the grinding block on the sliding tube moves downward in the rectangular opening, the grinding block moves out of the rectangular opening under the action of the restoring force of the spring telescopic rod, so that it slides in the rectangular opening and fits into the hole of the circuit board, and when the second spring compression rod moves upward, it drives the third spring telescopic rod to be compressed, pushing the T-shaped extrusion plate to slide slowly on the outer tube, so that the T-shaped extrusion plate is squeezed on the sliding tube, maintaining the pressure of the grinding arc on the grinding block on the circuit board, thereby ensuring the quality of subsequent grinding of the circuit board holes by the grinding arc of the grinding block.

[0026] In the present invention, after the hole is polished by the polishing block, the outer tube is moved upward by contraction of the electric telescopic rod, and then the polishing block on the lower side is driven to passively squeeze the circuit board, so that the lower polishing block moves downward in the rectangular opening and cooperates with the transmission gear to drive the upper sliding tube to move upward. Through the upward movement of the upper sliding tube, the L-shaped rod is squeezed to move outward of the outer tube and then reset, and the upper sliding tube that has moved upward is stuck, completing the contraction and reset of the polishing block. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 Schematic diagram of the three-dimensional structure of the driving motor and the grinding mechanism of the present invention;

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

[0030] Figure 4 The three-dimensional structural section of the outer tube of the present invention is Figure 1 ;

[0031] Figure 5 For the present invention Figure 4 A magnified view of the structure at center A;

[0032] Figure 6 The three-dimensional structural section of the outer tube of the present invention is Figure 2 ;

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

[0034] Figure 8 Schematic diagram of the three-dimensional structure of the inner tube and the sliding tube of the present invention;

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

[0036] In the figure: 1. Mounting seat; 2. Electric telescopic rod; 3. Driving motor; 4. Grinding mechanism; 41. Outer tube; 42. Inner tube; 43. Limiting slide groove; 44. Rectangular opening; 45. Cross plate; 46. Sliding 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. Coil 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 DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] See also Figures 1 to 9 The present invention provides a technical solution: a punching device for circuit board production, comprising a mounting base 1, a clamp for fixing the circuit board is provided on the mounting base 1, an electric telescopic rod 2 is fixedly connected to the mounting base 1, longitudinal slide rails are installed on both sides of the left and right sides of the top surface of the mounting base 1, transverse slide rails are installed on the two longitudinal slide rails, and the electric telescopic rod 2 is installed on the transverse slide rails, and the electric telescopic rod 2 is controlled to slide by cooperating with the longitudinal slide rails and the transverse slide rails to change the position of the electric telescopic rod 2, a driving motor 3 is fixedly connected to the lower end of the driving motor 3, a grinding mechanism 4 is fixedly installed on the lower end of the driving motor 3, a locking mechanism 5 is fixedly installed on the grinding mechanism 4, and the operation of the grinding mechanism 4 is controlled by the locking mechanism 5.

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

[0040] In this embodiment, 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 opened on the side of the outer tube 41, and the four rectangular openings 414 are equidistantly distributed in a ring shape; spring telescopic plates are fixedly connected to the upper and lower sides of the inner wall of the rectangular opening 414, and the size of the opening of the rectangular opening 414 is reduced by the spring telescopic plates, thereby reducing the entry of debris into 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 equidistantly annularly formed on the inner tube 42. A rectangular opening 44 is formed in each of the four limiting grooves 43. Two cross plates 45 are slidably arranged in the four rectangular openings 44. Slide tubes 46 are fixedly connected to the four ends of the cross plates 45, and the slide tubes 46 are slidably sleeved on the outer side of the inner tube 42.

[0042] A compression spring 47 is fixedly connected to the opposite ends of the two sliding tubes 46. The compression spring 47 is sleeved on the outer side of the inner tube 42, and the end of the compression spring 47 away from the sliding tube 46 is fixed to the outer wall of the inner tube 42. Four first spring compression rods 48 are fixedly connected to the opposite sides of the two sliding tubes 46, and the four first spring compression rods 48 are respectively slidably set in the four limiting sliding grooves 43.

[0043] Two hinged plates 49 are hinged on the outer sleeve of the first spring compression rod 48. The two hinged plates 49 are arranged in parallel. A grinding block 410 is hinged at one end of the two hinged 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, 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 an extrusion arc surface 413 are provided on the side of the grinding block 410 facing away from the inner tube 42 , and the two extrusion arc surfaces 413 face the two ends of the inner tube 42 respectively.

[0045] In this embodiment, 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 , and two tooth plates 416 are meshed on the transmission gear 415 , and the two tooth plates 416 are fixedly connected to the two "cross" plates 45 respectively.

[0046] In this embodiment, 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 bonded to the bottom end of the outer ring of the bearing 51;

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

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

[0049] 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. Both ends of the L-shaped rod 57 are inclined surfaces, and the cross 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 limit sleeve 54.

[0050] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 As shown, 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 hingedly connected to the outer wall of the ring sleeve 511, and a T-shaped extrusion plate 510 is hingedly connected to the end of the third spring telescopic rod 59 away from the ring sleeve 511. The T-shaped extrusion plate 510 is damped and penetrates the outer tube 41;

[0051] An end of the T-shaped extrusion plate 510 located inside the outer tube 41 is provided with an oblique surface, and the T-shaped extrusion plate 510 abuts against the sliding tube 46 via the oblique surface.

[0052] In this embodiment, 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 use method and advantages of the present invention: The use method of the punching 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: The circuit board to be punched is fixed on the mounting base 1, and then the drill bit 6 is rotated by the driving motor 3. The electric telescopic rod 2 is extended and drives the drill bit 6 to move downward and fit on the circuit board, thereby punching the circuit board;

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

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

[0058] 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 sliding 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, the grinding arc surface 412 of the grinding block 410 is driven to grind the holes in the circuit board;

[0059] When the grinding block 410 has finished grinding the hole, the outer tube 41 is moved upward by contracting the electric telescopic rod 2, thereby driving the lower grinding block 410 to passively squeeze the circuit board, causing the lower first spring compression rod 48 to compress. As the outer tube 41 moves upward, the second spring compression rod 53 moves downward under the action of the coil spring 55, driving the wedge block 56 to separate from one end of the L-shaped rod 57. When the second spring compression rod 53 moves downward, it pulls the T-shaped extrusion plate 510 to separate from the upper sliding tube 46 through the third spring telescopic rod 59.

[0060] Then, as the lower grinding block 410 moves downward in the rectangular opening 414, the transmission gear 415 rotates, causing the upper grinding block 410 and the slide tube 46 to move upward synchronously. When the grinding block 410 hits the inner wall of the rectangular opening 414, the extrusion arc surface 413 squeezes the rectangular opening 414, causing the grinding block 410 to retract into the outer tube 41.

[0061] When the two groups of grinding blocks 410 move back to back and retract into the outer tube 41, the upper grinding block 410 cooperates with the first spring compression rod 48 to push the slide tube 46 upward, squeezes the L-shaped rod 57 outward from the outer tube 41 and then resets, locking the upper slide tube 46 that has moved upward, completing the retraction and reset of the grinding block 410, and then the electric telescopic rod 2 continues to retract to pull the drill bit 6 out of the hole in the circuit board.

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A punching device for circuit board production, comprising a mounting base (1), characterized in that: The mounting seat (1) is fixedly connected to an electric telescopic rod (2), the lower end of the electric telescopic rod (2) is fixedly connected to a driving motor (3), the lower end of the driving motor (3) is fixedly mounted with a grinding mechanism (4), the grinding mechanism (4) is fixedly mounted with a locking mechanism (5), and the operation of the grinding mechanism (4) is controlled by the locking mechanism (5); A drill bit (6) is fixedly mounted on the lower end of the grinding mechanism (4).

2. The punching device for circuit board production according to claim 1, characterized in that: The grinding mechanism (4) includes an outer tube (41) fixed to the lower end of the driving motor (3), and the lower end of the outer tube (41) is fixedly connected to the drill bit (6). Four rectangular openings (414) are opened on the side of the outer tube (41), and the four rectangular openings (414) are equidistantly distributed in a ring shape. The inner wall of the outer tube (41) is fixedly connected to the inner tube (42), and the inner tube (42) is located on the central axis of the outer tube (41). Four limiting sliding grooves (43) are formed in an annular shape at equal distances on the inner tube (42). A rectangular opening (44) is formed in each of the four limiting sliding grooves (43), and two "cross" plates (45) are slidably provided 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 outer side of the inner tube (42); A compression spring (47) is fixedly connected to the opposite ends of the two sliding tubes (46), and the compression spring (47) is sleeved on the outer side of the inner tube (42), and the end of the compression spring (47) away from the sliding tube (46) is fixed on the outer wall of the inner tube (42). Four first spring compression rods (48) are fixedly connected to the opposite sides of the two sliding tubes (46), and the four first spring compression rods (48) are respectively slidably set in the four limiting sliding grooves (43); Two hinged plates (49) are hinged on the outer sleeve of the first spring compression rod (48), and the two hinged plates (49) are arranged in parallel. A grinding block (410) is hinged on one end of the two hinged 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 obliquely.

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

4. The punching device for circuit board production according to claim 2, characterized in that: A transmission gear (415) is rotatably connected to the middle portion of the inner wall of the inner tube (42), and two tooth plates (416) are meshed on the transmission gear (415), and the two tooth plates (416) are fixedly connected to the two "cross" plates (45) respectively.

5. The punching device for circuit board production according to claim 4, characterized in that: The locking mechanism (5) comprises a bearing (51) sleeved on the outside of the outer tube (41), and an annular rubber pad (52) is bonded to the bottom end of the outer ring of the bearing (51); Four second spring compression rods (53) are fixedly connected to the inner ring of the bearing (51) at equal distances in a ring shape, and a limiting sleeve (54) is movably sleeved on the outer sleeve of the second spring compression rod (53), and the limiting sleeve (54) is fixed on the outer wall of the outer tube (41); A coil spring (55) is movably sleeved on the outer side of the outer sleeve of the second spring compression rod (53), one end of the coil 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 coil 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), the inclined surface of the wedge block (56) is in contact with an L-shaped rod (57), and the cross bar of the L-shaped rod (57) passes through the outer wall of the outer tube (41), and 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 limit sleeve (54).

6. The punching device for circuit board production according to claim 5, characterized in that: The locking mechanism (5) further comprises a ring sleeve (511) fixedly sleeved on the second spring compression rod (53); a third spring telescopic rod (59) is hingedly connected to the outer wall of the ring sleeve (511); a T-shaped extrusion plate (510) is hingedly connected to one end of the third spring telescopic rod (59) away from the ring sleeve (511); and the T-shaped extrusion plate (510) is damped and penetrates the outer tube (41); An end of the T-shaped extrusion plate (510) located inside the outer tube (41) is provided with an oblique surface, and the T-shaped extrusion plate (510) abuts against the sliding tube (46) through the oblique surface.

7. The punching device for circuit board production according to claim 5, characterized in that: Both ends of the L-shaped rod (57) are inclined surfaces.

8. The method for using the punching device for circuit board production according to claim 6, characterized in that: The steps include: S1: The circuit board to be punched is fixed on the mounting base (1), and then the drill bit (6) is driven to rotate by the driving motor (3). The electric telescopic rod (2) is extended to drive the drill bit (6) downward to fit on the circuit board, thereby punching the circuit board; S2: After the drill bit (6) drills through the circuit board, the electric telescopic rod (2) slowly extends, driving the outer tube (41) to move into the drill hole. When the bearing (51) contacts the circuit board, the electric telescopic rod (2) continues to extend, causing the second spring compression rod (53) on the bearing (51) to slide in the ring sleeve (511), pushing the wedge block (56) to squeeze one end of the L-shaped rod (57), causing the L-shaped rod (57) to move to the side away from the outer tube (41), thereby releasing the L-shaped rod (57). The shaped rod (57) is located at one end of the inner side of the outer tube (41) to restrict the upper sliding tube (46). At this time, the upper sliding tube (46) moves downward under the reset force of the compression spring (47). When the upper sliding tube (46) moves downward, the tooth plate (416) on the inner "cross" plate (45) drives the transmission gear (415) to rotate, thereby driving the lower sliding tube (46) to move upward on the inner tube (42) synchronously, prompting the two groups of grinding blocks (410) on the opposite sides of the two sliding tubes (46) to move toward each other; S3: When the grinding block (410) on the sliding tube (46) moves downward in the rectangular opening (414), the grinding block (410) moves out of the rectangular opening (414) under the action of the restoring force of the spring telescopic rod (411), so that it slides in the rectangular opening (414) and fits into the hole of the circuit board; When the second spring compression rod (53) moves upward, the third spring telescopic rod (59) is compressed, pushing the T-shaped extrusion plate (510) to slide slowly on the outer tube (41), so that the T-shaped extrusion plate (510) is squeezed on the sliding tube (46), maintaining the pressure of the grinding arc surface (412) on the grinding block (410) on the circuit board, and as the driving motor (3) rotates, the grinding arc surface (412) of the grinding block (410) is driven to grind the holes in the circuit board.

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