Circuit board punching device for cutting circuit board

Abstract

The utility model discloses a kind of circuit board punching device for circuit board cutting, including drill, drill rod of the drill is detachably connected with composite drill bit, the composite drill bit includes drill bit shell, the outer side wall middle position of the drill bit shell is equipped with several inner grooves in circumferential array distribution, the inside center of each the inner groove is fixedly connected with telescopic spring polishing rod, the telescopic spring polishing rod is jointly composed by tubular portion fixed in inner groove inside and rod-shaped portion connected in tubular portion inside by spring, and polishing sheet is provided on the tubular portion outside of the telescopic spring polishing rod. The utility model is driven by inner core to make one-way sliding block contract inwards, telescopic baffle expands to outside simultaneously, and then no longer blocks telescopic spring polishing rod, at this time telescopic spring polishing rod is subjected to centrifugal effect and then polishes the outside of hole wall, and telescopic spring polishing rod only extends after inner core is pressed, and then accurately positions the position of hole wall.

Description

Technical Field

[0001] This utility model relates to the field of circuit board drilling technology, and in particular to a circuit board drilling device for circuit board cutting. Background Technology

[0002] Drilling is an indispensable and crucial step in the circuit board manufacturing process. On one hand, drilling is used to install the pins of electronic components, enabling the components to make electrical connections with the circuits on the circuit board and ensuring the normal operation of the circuit. On the other hand, drilling requires the use of computer-aided design software to generate drilling data based on the circuit board design requirements. Then, CNC equipment converts the drilling data into control commands to drive the drill bit to perform drilling operations on the circuit board, precisely controlling the position, diameter, and depth of the drill holes.

[0003] However, in actual drilling processes, due to the gap between the drill bit and the borehole, and the influence of various factors such as mechanical stress, thermal stress, and drill bit wear, tiny cracks easily appear on the inner wall of the borehole. Although these cracks are not easily visible to the naked eye, they may further expand under the cutting stress during subsequent circuit board cutting processes, leading to quality problems such as delamination and breakage of the circuit board. This not only reduces the yield of the circuit board but may also affect the performance and lifespan of electronic products, severely restricting the production efficiency and product quality of the circuit board manufacturing industry. Therefore, those skilled in the art have proposed a circuit board drilling device for circuit board cutting to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a circuit board drilling device for circuit board cutting. This circuit board drilling device uses an inner core to drive a one-way slider to retract inward, while a telescopic baffle extends outward, thus no longer obstructing the telescopic spring grinding rod. At this time, the telescopic spring grinding rod is subjected to centrifugal force to polish the outer side of the hole wall. Moreover, the telescopic spring grinding rod only extends after the inner core is pressed, thereby accurately positioning the hole wall.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A circuit board drilling device for circuit board cutting includes a drill bit, a composite drill bit detachably connected to the drill rod of the drill bit, the composite drill bit including a drill bit shell, and a plurality of inner grooves arranged in a circumferential array at the middle position of the outer side wall of the drill bit shell. A telescopic spring grinding rod is fixedly connected to the center of the inner groove. The telescopic spring grinding rod is composed of a tubular part fixed inside the inner groove and a rod-shaped part connected inside the tubular part by a spring. A polishing disc is provided on the outer side of the tubular part of the telescopic spring grinding rod.

[0007] Preferably, a return spring is fixedly connected inside the inner groove and on both sides of the telescopic spring grinding rod. The other end of the two return springs is fixedly connected to an inner core. One-way sliders are fixedly connected to the upper and lower sides of the inner wall of the inner core. A baffle spring is fixedly connected to the upper and lower side walls of the inner groove. A telescopic baffle is fixedly connected to the other end of the two baffle springs. A wedge-shaped surface is provided on the side wall of the telescopic baffle that is close to the one-way slider.

[0008] Preferably, the portion of the inner core located on the outer side of the drill bit housing is arc-shaped.

[0009] Preferably, the rod-shaped portion of the telescopic spring grinding rod is tapered, and an outlet hole is provided in the middle part of the inner core, while the rod-shaped portion of the telescopic spring grinding rod is tightly attached to the inner side of the telescopic baffle.

[0010] Preferably, the outer side wall of the drill bit is provided with a spacing adjustment wheel, the rear of the drill bit is provided with a vertical rod, the drill bit is slidably connected to the vertical rod, the rear side wall of the drill bit is also fixedly connected with a locking clamp, and the front side wall of the vertical rod is fixedly connected with an adjustment tooth.

[0011] Preferably, a base is fixedly connected to the lower side wall of the upright, and a circuit board clamp is installed on the upper side wall of the base.

[0012] This utility model has the following beneficial effects:

[0013] 1. In this utility model, when the inner core is squeezed inward by the drill hole and retracts inward, the one-way slider retracts inward along with the inner core, while the telescopic baffle expands outward, thus no longer blocking the telescopic spring grinding rod. At this time, the telescopic spring grinding rod is subjected to centrifugal force to polish the outer side of the hole wall. Moreover, the telescopic spring grinding rod will only extend after the inner core is pressed, thus accurately positioning the position of the hole wall and avoiding abnormal extension of the telescopic spring grinding rod.

[0014] 2. In this utility model, the conical telescopic spring grinding rod rod-shaped part can ensure that when the inner core is not squeezed and the composite drill bit does not rotate, the rod-shaped part of the telescopic spring grinding rod can be pulled back by the spring set in the tubular part of the telescopic spring grinding rod without being blocked by the telescopic baffle. Attached Figure Description

[0015] Figure 1 This is a perspective view of a circuit board drilling device for circuit board cutting according to the present invention;

[0016] Figure 2 This is a rear view of a circuit board drilling device for cutting circuit boards according to the present invention;

[0017] Figure 3 This is a schematic diagram of the composite drill bit in a circuit board drilling device for circuit board cutting proposed in this utility model;

[0018] Figure 4 This is an isometric side sectional view of a composite drill bit in a circuit board drilling device for circuit board cutting proposed in this utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the inner groove of the composite drill bit in a circuit board drilling device for circuit board cutting proposed in this utility model.

[0020] Legend:

[0021] 1. Base; 2. Circuit board clamp; 3. Composite drill bit; 4. Adjusting teeth; 5. Vertical rod; 6. Drill tool; 7. Spacing adjustment wheel; 8. Locking clamp;

[0022] 31. Drill bit housing; 32. Inner groove; 33. Inner core; 34. One-way slider; 35. Telescopic stop plate; 36. Stop plate spring; 37. Outlet hole; 38. Return spring; 39. Telescopic spring grinding rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1-5 This utility model provides an embodiment of a circuit board drilling device for circuit board cutting, comprising a drill bit 6, a composite drill bit 3 detachably connected to the drill rod of the drill bit 6, the composite drill bit 3 comprising a drill bit housing 31, and a plurality of inner grooves 32 arranged in a circumferential array at the middle of the outer side wall of the drill bit housing 31. A telescopic spring polishing rod 39 is fixedly connected to the center of the inner wall of each inner groove 32. The telescopic spring polishing rod 39 is composed of a tubular part fixed inside the inner groove 32 and a rod-shaped part connected inside the tubular part by a spring. A polishing disc is provided on the outer side of the tubular part of the telescopic spring polishing rod 39. When the drill bit 6 can drive the drill rod inside to rotate rapidly, it can also drive the drill rod part to rise and fall, thereby driving the composite drill bit 3 to perform drilling operations on the circuit board. When the composite drill bit 3 rotates, the telescopic spring polishing rod 39 is subjected to centrifugal force and extends the rod part, thereby polishing the outer side of the hole wall.

[0025] Inside the inner groove 32, on both sides of the telescopic spring grinding rod 39, are fixedly connected return springs 38. The other ends of the two return springs 38 are fixedly connected to an inner core 33. One-way sliders 34 are fixedly connected to the upper and lower sides of the inner wall of the inner core 33. Baffle springs 36 are fixedly connected to the upper and lower sides of the inner groove 32. The other ends of the two baffle springs 36 are fixedly connected to telescopic baffles 35. The side wall of the telescopic baffle 35 that is close to the one-way slider 34 has a matching wedge-shaped surface. When the inner core 33 is squeezed inward by the drill hole, the one-way slider 34 retracts inward along with it, while the telescopic baffle 35 expands outward, thus no longer obstructing the telescopic spring grinding rod 39. At this time, the telescopic spring grinding rod 39 polishes the outer side of the hole wall under centrifugal force. The telescopic spring grinding rod 39 only extends after the inner core 33 is compressed, thus accurately positioning the hole wall and preventing abnormal extension of the telescopic spring grinding rod 39.

[0026] The inner core 33, located on the outer side of the drill bit housing 31, is arc-shaped. The rod-shaped portion of the telescopic spring grinding rod 39 is tapered, and an outlet hole 37 is provided in the middle of the inner core 33. The rod-shaped portion of the telescopic spring grinding rod 39 is tightly attached to the inner side of the telescopic baffle 35. The tapered rod-shaped portion of the telescopic spring grinding rod 39 ensures that when the inner core 33 is not compressed and the composite drill bit 3 is not rotating, the rod-shaped portion of the telescopic spring grinding rod 39 can be pulled back by the spring located in the tubular portion of the telescopic spring grinding rod 39 without being blocked by the telescopic baffle 35.

[0027] The drill bit 6 has a spacing adjustment wheel 7 on its outer side wall, and a vertical rod 5 is located at the rear of the drill bit 6. The drill bit 6 is slidably connected to the vertical rod 5. A locking clamp 8 is also fixedly connected to the rear side wall of the drill bit 6, and an adjusting tooth 4 is fixedly connected to the front side wall of the vertical rod 5. The spacing adjustment wheel 7 can adjust the hobbing teeth inside the drill bit 6, allowing the drill bit 6 to slide on the adjusting tooth 4. The locking clamp 8 can lock the drill bit 6 to the vertical rod 5 to prevent the drill bit 6 from sliding during drilling operations. A base 1 is fixedly connected to the lower side wall of the vertical rod 5, and a circuit board clamp 2 is installed on the upper side wall of the base 1. The circuit board clamp 2 can be used to fix the circuit board that needs to be drilled.

[0028] Working principle: Before drilling, the gears inside the drill bit 6 can be adjusted using the pitch adjustment wheel 7, allowing the drill bit 6 to slide on the adjustment gear 4. The locking clamp 8 can lock the drill bit 6 onto the upright rod 5 to prevent slippage during drilling. The circuit board clamp 2 can fix the circuit board to be drilled. When the drill bit 6 can drive its internal drill rod to rotate rapidly, it can also drive the drill rod part to rise and fall, thereby driving the compound drill bit 3 to drill the circuit board. When the compound drill bit 3 rotates, the telescopic spring grinding rod 39 is subjected to rotation. The centrifugal force causes the rod to extend, thus polishing the outer side of the hole wall. When the inner core 33 is squeezed inward by the drilling, the one-way slider 34 also retracts inward under the action of the inner core 33. At the same time, the telescopic baffle 35 expands outward, thus no longer blocking the telescopic spring polishing rod 39. At this time, the telescopic spring polishing rod 39 polishes the outer side of the hole wall under the centrifugal force. The telescopic spring polishing rod 39 only extends after the inner core 33 is pressed, thus accurately positioning the hole wall and avoiding abnormal extension of the telescopic spring polishing rod 39.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A circuit board drilling device for circuit board cutting, comprising a drill (6), characterized in that: A composite drill bit (3) is detachably connected to the drill rod of the drill tool (6). The composite drill bit (3) includes a drill bit shell (31). Several inner grooves (32) arranged in a circular array are opened in the middle of the outer side wall of the drill bit shell (31). A telescopic spring polishing rod (39) is fixedly connected to the center of the inner groove (32). The telescopic spring polishing rod (39) is composed of a tubular part fixed inside the inner groove (32) and a rod-shaped part connected inside the tubular part by a spring. A polishing disc is provided on the outside of the tubular part of the telescopic spring polishing rod (39).

2. The circuit board drilling device for circuit board cutting according to claim 1, characterized in that: Inside the inner groove (32) and on both sides of the telescopic spring grinding rod (39), there are fixed reset springs (38). The other ends of the two reset springs (38) are fixedly connected to the inner core (33). The upper and lower sides of the inner wall of the inner core (33) are fixedly connected to the one-way sliders (34). The upper and lower side walls of the inner groove (32) are fixedly connected to the baffle springs (36). The other ends of the two baffle springs (36) are fixedly connected to the telescopic baffles (35). The side wall of the telescopic baffles (35) that is close to the one-way sliders (34) is provided with a matching wedge-shaped surface.

3. The circuit board drilling device for circuit board cutting according to claim 2, characterized in that: The inner core (33) is located on the outside of the drill bit housing (31) in an arc shape.

4. The circuit board drilling device for circuit board cutting according to claim 3, characterized in that: The rod-shaped portion of the telescopic spring polishing rod (39) is tapered, and an outlet hole (37) is provided in the middle part of the inner core (33), while the rod-shaped portion of the telescopic spring polishing rod (39) is closely attached to the inner side of the telescopic baffle (35).

5. The circuit board drilling device for circuit board cutting according to claim 1, characterized in that: The drill bit (6) is provided with a spacing adjustment wheel (7) on its outer side wall. A vertical rod (5) is provided at the rear of the drill bit (6). The drill bit (6) is slidably connected to the vertical rod (5). A locking clamp (8) is also fixedly connected to the rear side wall of the drill bit (6). An adjustment tooth (4) is fixedly connected to the front side wall of the vertical rod (5).

6. The circuit board drilling device for circuit board cutting according to claim 5, characterized in that: The lower side wall of the pole (5) is fixedly connected to a base (1), and the upper side wall of the base (1) is equipped with a circuit board clamp (2).

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