Drill point structure and drilling device

Abstract

The utility model belongs to the technical field of PCB drill points, and relates to a drill point structure and a drilling device. The drill pin structure comprises a pin body, the pin body comprises a main body part and a drill bit part, one end of the drill bit part is connected with the main body part, and the section, perpendicular to the center line of the pin body, of the drill bit part is a first section; the vertical distance between the point, farthest from the center line of the needle body, on the first section and the center line of the needle body is a first distance, and the first distance is gradually reduced from the end away from the main body part to the end close to the main body part. According to the drill point structure, friction between scraps and the side surface of the drill bit part can be reduced, and then abrasion of the drill bit part in the drilling process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of PCB board drill bits, and particularly relates to a drill bit structure and a drilling device. Background Art

[0002] With the development of electronic products towards being thinner, lighter, shorter, and more multifunctional, the design of PCB boards is becoming increasingly complex, and it is necessary to process smaller, deeper, or more layers of holes. This requires that the drill bit must be able to adapt to smaller hole diameters and higher densities while ensuring accuracy. In the prior art, in order to enhance the hardness, wear resistance, and corrosion resistance of the drill bit, a coating is generally provided on the surface of the drill bit. However, the drill bit part of the existing drill bit is generally a cylindrical structure, which causes a large friction between the waste chips generated during the drilling process and the coating on the drill bit part, resulting in a large wear of the drill bit part of the drill bit during the drilling process. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is: aiming at the technical problem of large wear of the drill bit part of the existing drill bit during the drilling process, a drill bit structure and a drilling device are provided.

[0004] To solve the above technical problem, on the one hand, an embodiment of the utility model provides a drill bit structure, including a needle body, the needle body includes a main body part and a drill head part, one end of the drill head part is connected to the main body part, the cross-section of the drill head part perpendicular to the center line of the needle body is a first cross-section, the perpendicular distance from the point on the first cross-section farthest from the center line of the needle body to the center line of the needle body is a first distance, and the first distance gradually decreases from the end far from the main body part to the end close to the main body part.

[0005] According to the drill bit structure of the embodiment of the utility model, the cross-section of the drill head part perpendicular to the center line of the needle body is set as the first cross-section, the perpendicular distance from the point on the first cross-section farthest from the center line of the needle body to the center line of the needle body is set as the first distance, and the first distance gradually decreases from the end far from the main body part to the end close to the main body part. Thus, when the drill bit drills a hole, only the end of the drill head part with a larger first distance contacts the PCB board, a gap for waste chips to pass through is formed between the side surface of the drill head part and the hole wall, the friction between the waste chips and the side surface of the drill head part is reduced, and further the wear of the drill head part during the drilling process is reduced.

[0006] Optionally, the cross-section of the main body part perpendicular to the center line of the needle body is a second cross-section, the perpendicular distance from the point on the second cross-section farthest from the center line of the needle body to the center line of the needle body is a second distance, and the minimum value of the first distance is greater than or equal to the second distance.

[0007] Optionally, the needle body further includes a drill tip portion, the other end of the drill head portion is connected to the drill tip portion, a cross-section of the drill tip portion perpendicular to the central axis of the needle body is a third cross-section, and the perpendicular distance from the point on the third cross-section that is farthest from the central axis of the needle body to the central axis of the needle body is a third distance, and the third distance gradually decreases from the end close to the drill head portion to the end away from the drill head portion.

[0008] Optionally, a chip removal groove is provided on the side wall of the needle body.

[0009] Optionally, the chip removal groove is spirally extended and provided on the side wall of the needle body.

[0010] Optionally, a plurality of chip removal grooves are provided, and the plurality of chip removal grooves are arranged at intervals along the circumferential direction of the needle body.

[0011] Optionally, the drill needle structure further includes a protective layer coated on the needle body.

[0012] Optionally, the drill needle structure further includes a mounting rod, and the mounting rod is connected to the main body portion.

[0013] Optionally, the mounting rod includes a handle rod and a transition rod, and the transition rod is connected between the main body portion and the handle rod.

[0014] On the other hand, an embodiment of the present invention provides a drilling device, including a rotary drive mechanism and the above-mentioned drill needle structure, the drill needle structure is installed on the rotary drive mechanism, and the rotary drive mechanism is used to drive the drill needle structure to rotate.

[0015] According to the drilling device of the embodiment of the present invention, the drill needle structure is driven to rotate by the rotary drive mechanism to realize drilling on the PCB board. The cross-section of the drill head portion of the drill needle structure perpendicular to the central axis of the needle body is set as the first cross-section, and the perpendicular distance from the point on the first cross-section that is farthest from the central axis of the needle body to the central axis of the needle body is set as the first distance, and the first distance gradually decreases from the end away from the main body portion to the end close to the main body portion. Thus, when the drill needle drills a hole, only the end of the drill head portion with a larger first distance contacts the PCB board, so that a gap for waste chips to pass through is formed between the side surface of the drill head portion and the hole wall, reducing the friction between the waste chips and the side surface of the drill head portion, and further reducing the wear of the drill head portion during the drilling process. Description of the Drawings

[0016] Figure 1 is a schematic diagram of a drill needle structure provided by an embodiment of the present invention;

[0017] Figure 2 is Figure 1 an enlarged schematic diagram at the drill head portion;

[0018] Figure 3 This is another enlarged schematic diagram (when not sharpened) of the drill bit structure provided by an embodiment of the present utility model at the drill head part.

[0019] The reference numerals in the specification are as follows:

[0020] 1. Needle body; 11. Main body part; 12. Drill head part; 13. Drill tip part; 14. Chip removal groove;

[0021] 2. Mounting rod; 21. Shank; 22. Transition rod. Detailed implementation manners

[0022] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] As Figures 1 to 3 shown, the drill bit structure provided by the embodiment of the present utility model includes a needle body 1. The needle body 1 includes a main body part 11 and a drill head part 12. One end of the drill head part 12 is connected to the main body part 11. The cross-section of the drill head part 12 perpendicular to the center line of the needle body 1 is the first cross-section. The perpendicular distance from the point on the first cross-section farthest from the center line of the needle body 1 to the center line of the needle body 1 is the first distance. The first distance gradually decreases from the end far from the main body part 11 to the end close to the main body part 11.

[0024] For the drill bit structure provided by the embodiment of the present utility model, the cross-section of the drill head part 12 perpendicular to the center line of the needle body 1 is set as the first cross-section, the perpendicular distance from the point on the first cross-section farthest from the center line of the needle body 1 to the center line of the needle body 1 is set as the first distance, and the first distance gradually decreases from the end far from the main body part 11 to the end close to the main body part 11. Thus, when the drill bit drills a hole, only the end of the drill head part 12 with a larger first distance contacts the PCB board, and a gap for waste chips to pass through is formed between the side surface of the drill head part 12 and the hole wall, reducing the friction between the waste chips and the side surface of the drill head part 12, and further reducing the wear of the drill head part 12 during the drilling process.

[0025] In one embodiment, as Figure 2 and Figure 3 shown, the cross-section of the main body part 11 perpendicular to the center line of the needle body 1 is the second cross-section. The perpendicular distance from the point on the second cross-section farthest from the center line of the needle body 1 to the center line of the needle body 1 is the second distance. The minimum value of the first distance is greater than or equal to the second distance, forming the needle body 1.

[0026] As Figure 2 and Figure 3In the illustrated embodiment, the minimum value of the first distance is greater than the second distance. The outer contour of the main body portion 11 is generally a cylindrical structure, and the outer contour of the drill head portion 12 is generally a frustum-shaped structure. The main body portion 11 and the drill head portion 12 are coaxially arranged to form the needle body 1. At this time, the radial cross-section of the outer contour of the drill head portion 12 is equivalent to the first cross-section, and the first distance is equivalent to the radius of the radial cross-section of the outer contour of the drill head portion 12. The radial cross-section of the outer contour of the main body portion 11 is equivalent to the second cross-section, and the second distance is equivalent to the radius of the radial cross-section of the outer contour of the main body portion 11.

[0027] In Figure 2 and Figure 3 the illustrated embodiment, the diameter of the radial cross-section of the end of the outer contour of the drill head portion 12 far from the main body portion 11 is 0.315 mm, and the diameter of the radial cross-section of the end of the outer contour of the drill head portion 12 close to the main body portion 11 is 0.3 mm. That is, the maximum value of the first distance is 0.1575 mm, and the minimum value of the first distance is 0.15 mm. The diameter of the radial cross-section of the main body portion 11 is 0.29 mm. That is, the second distance is 0.145 mm. The difference between the diameter of the radial cross-section of the end of the drill head portion 12 close to the main body portion 11 and the diameter of the radial cross-section of the main body portion 11 is 0.01 mm. That is, the difference between the minimum first distance and the second distance is 0.005 mm, forming the needle body 1.

[0028] In an embodiment, as Figure 2 and Figure 3 shown, the needle body 1 further includes a drill tip portion 13. The other end of the drill head portion 12 is connected to the drill tip portion 13. The cross-section of the drill tip portion 13 perpendicular to the center line of the needle body 1 is the third cross-section. The perpendicular distance from the point on the third cross-section farthest from the center line of the needle body 1 to the center line of the needle body 1 is the third distance, and the third distance gradually decreases from the end close to the drill head portion 12 to the end far from the main body portion 11. When drilling, the drill tip portion 13 first contacts the PCB board to achieve drilling.

[0029] In an embodiment, as Figure 2 and Figure 3 shown, the outer contour of the drill tip portion 13 is generally a conical structure, and the drill tip portion 13 and the drill head portion 12 are coaxially arranged to form the needle body 1.

[0030] In an embodiment, as Figure 2 shown, a chip removal groove 14 is provided on the side wall of the needle body 1 for discharging the waste chips generated during drilling.

[0031] In an embodiment, as Figure 2 shown, the chip removal groove 14 extends spirally on the side wall of the needle body 1 to form the needle body 1.

[0032] In an embodiment, as Figure 2As shown, there are multiple chip removal grooves 14, and the multiple chip removal grooves 14 are arranged at intervals along the circumferential direction of the needle body 1.

[0033] In one embodiment, as Figure 2 shown, the drill bit structure further includes a protective layer coated on the needle body 1 for protecting the needle body 1 and reducing the wear of the needle body 1.

[0034] In one embodiment, as Figure 1 shown, the drill bit structure further includes a mounting rod 2, and the mounting rod 2 is connected to the main body portion 11 for realizing the driving and mounting of the drill bit structure.

[0035] In one embodiment, as Figure 1 shown, the mounting rod 2 includes a shank 21 and a transition rod 22, and the transition rod 22 is connected between the main body portion 11 and the shank 21 to form the drill bit structure.

[0036] The drill bit structure provided by the embodiment of the present utility model has the following advantages:

[0037] (1) Reduce the wear of the drill head 12 during drilling, give full play to the performance of the coating (i.e., the protective layer), greatly improve the life of the coated drill bit in each grinding, reduce the tool change time and steps, improve the equipment utilization rate, and at the same time reduce the tool cost. In addition, since the flank wear is small during each grinding, the machining accuracy, stability and hole wall quality will be significantly improved in the next grinding, and the drilling accuracy and hole wall quality can be significantly improved.

[0038] (2) Through the design of the drill head 12, the frictional wear of the waste chips on the coating during the cutting of the drill bit structure can be greatly reduced, thereby increasing the upper limit of the use of the coating and giving full play to the role of the coating technology.

[0039] (3) The shape of the drill head 12 provides better protection for the flank, improves problems such as hole position accuracy and hole wall quality during the machining process, and can reduce the drilling cost.

[0040] The embodiment of the present utility model also provides a drilling device, including a rotary drive mechanism and the above-mentioned drill bit structure. The drill bit structure is installed on the rotary drive mechanism, and the rotary drive mechanism is used to drive the drill bit structure to rotate. Specifically, the mounting rod 2 can be installed on the rotary drive mechanism to realize the rotary drive of the drill bit structure by the rotary drive mechanism.

[0041] According to the drilling device of the embodiment of the present utility model, the drill needle structure is driven to rotate by a rotation driving mechanism to realize drilling on a PCB board. The cross-section of the drill head 12 perpendicular to the center line of the needle body 1 of the drill needle structure is set as the first cross-section. The perpendicular distance between the point on the first cross-section farthest from the center line of the needle body 1 and the center line of the needle body 1 is set as the first distance, and the first distance gradually decreases from the end far away from the main body part 11 to the end close to the main body part 11. Therefore, when the drill needle drills a hole, only the end with a larger first distance of the drill head 12 contacts the PCB board, so that a gap for waste chips to pass through is formed between the side surface of the drill head 12 and the hole wall, reducing the friction between the waste chips and the side surface of the drill head 12, and further reducing the wear of the drill head 12 during the drilling process.

[0042] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A drill bit structure, characterized in that: The needle body includes a main body and a drill head, one end of the drill head is connected to the main body, a section of the drill head perpendicular to the center line of the needle body is a first section, a vertical distance between the point on the first section farthest from the center line of the needle body and the center line of the needle body is a first distance, and the first distance gradually decreases from an end far away from the main body to an end close to the main body.

2. The drill bit structure according to claim 1, characterized in that: The section of the main body perpendicular to the centerline of the needle body is the second section, the perpendicular distance between the point on the second section farthest from the centerline of the needle body and the centerline of the needle body is the second distance, and the minimum value of the first distance is greater than or equal to the second distance.

3. The drill bit structure according to claim 2, characterized in that: The needle body also includes a drill tip portion, the other end of the drill head portion is connected to the drill tip portion, the section of the drill tip portion perpendicular to the center line of the needle body is a third section, the vertical distance between the point on the third section farthest from the center line of the needle body and the center line of the needle body is a third distance, and the third distance gradually decreases from one end close to the drill head portion to an end far away from the drill head portion.

4. The drill bit structure according to claim 1, characterized in that: The side wall of the needle body is provided with a chip removal groove.

5. The drill bit structure according to claim 4, characterized in that: The chip removal groove is spirally extended and arranged on the side wall of the needle body.

6. The drill bit structure according to claim 5, characterized in that: A plurality of the chip removal grooves are provided, and the plurality of chip removal grooves are arranged at intervals along the circumference of the needle body.

7. The drill bit structure according to claim 1, characterized in that: The drill needle structure further includes a protective layer coated on the needle body.

8. The drill bit structure according to claim 1, characterized in that: The drill bit structure also includes a mounting rod, and the mounting rod is connected to the main body.

9. The drill needle structure according to claim 8, characterized in that: The mounting rod comprises a handle rod and a transition rod, and the transition rod is connected between the main body and the handle rod.

10. A drilling device, characterized in that: It comprises a rotary drive mechanism and the drill bit structure according to any one of claims 1 to 9, wherein the drill bit structure is mounted on the rotary drive mechanism, and the rotary drive mechanism is used to drive the drill bit structure to rotate.

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