A type of large-core, thick-walled, bending-resistant recycled tungsten carbide drill bit
By designing a truncated cone-shaped tungsten carbide drill bit and setting up a chip removal groove, the problem of drill bit bending and deformation was solved, thus achieving drilling stability and accuracy and extending the service life of the drill bit.
Patent Information
- Application Number
- CN202522359240.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-06
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-11-06
AI Technical Summary
Traditional tungsten carbide drill bits bend and deform during drilling due to radial pressure concentration, causing deviations in the borehole diameter and position.
Both the No. 1 and No. 2 needle bodies are frustum-shaped structures, combined with recycled tungsten steel material to increase the overall strength of the drill bit. Spiral and triangular frustum-shaped grooves are set on the surface of the needle body and the needle tip to form a complete chip removal channel.
Reduce drill bit bending deformation, improve drilling accuracy, extend service life, avoid debris blockage, and ensure the stability and positional accuracy of the drilling process.
Smart Images
Figure CN224940184U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drill bit technology, specifically a large-core, thick-walled, bending-resistant recycled tungsten steel drill bit. Background Technology
[0002] In the field of precision drilling, tungsten carbide drill bits are widely used in PCB processing, ceramic micro-hole manufacturing and other applications due to their high strength and high wear resistance.
[0003] Traditional tungsten carbide drill bits mostly adopt a cylindrical needle body structure with a consistent diameter from the needle body to the needle tip. During the drilling process, the drill bit is subjected to continuous radial pressure and cutting impact force. The radial pressure tends to concentrate at a certain section of the needle body, causing the needle body to bend and deform, thereby causing deviation in the drilling diameter and displacement of the hole position. Utility Model Content
[0004] The purpose of this invention is to provide a thick, bending-resistant recycled tungsten steel drill bit. In this device, both the first and second needle bodies are designed as frustum-shaped cone structures to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a thick-core, bending-resistant recycled tungsten carbide drill bit, comprising a drill bit shank, the drill bit shank being a cylindrical structure made of recycled tungsten carbide, a first needle body fixedly mounted at one end of the drill bit shank, a second needle body fixedly mounted at the end of the first needle body away from the drill bit shank, and a needle tip provided at the end of the second needle body away from the first needle body. The first needle body, the second needle body, and the needle tip are all made of recycled tungsten carbide, and the drill bit shank, the first needle body, the second needle body, and the needle tip together constitute a complete drill bit structure.
[0006] Preferably, the first needle body has a frustum-shaped structure, and the end of the first needle body near the second needle body has a small-diameter frustum-shaped top. The outer surface of the end where the first needle body connects to the second needle body is provided with a chamfer and smoothly connected to the second needle body.
[0007] By adopting the above technical solution, the overall strength of the drill bit can be increased through the frustum-shaped structure of the first needle body.
[0008] Preferably, the second needle body has a frustum-shaped structure, with the end of the second needle body near the first needle body having a large-diameter frustum-shaped bottom, and the needle tip at the other end of the second needle body being an integrally formed structure with the second needle body.
[0009] By adopting the above technical solution, the structural strength of the device during drilling can be increased through the integrally molded No. 2 needle body and needle head.
[0010] Preferably, the outer surface of the second needle body is provided with a first groove, the first groove is a spiral structure, and two first grooves are symmetrically arranged on the outer surface of the second needle body, with the two first grooves passing through both ends of the second needle body respectively.
[0011] Using the above technical solution, the first groove can be used to remove the debris from the drilling process.
[0012] Preferably, the surface of the needle tip is provided with a second groove, the cross-section of the second groove is a triangular structure, the second groove is connected to one end of the first groove, and two second grooves are symmetrically arranged on the surface of the needle tip.
[0013] Using the above technical solution, the debris can be guided and discharged through the No. 2 tank.
[0014] Preferably, the outer surface of the first needle body is provided with a third groove, and two third grooves are symmetrically arranged on the outer surface of the first needle body. The third groove is connected to the end of the first groove away from the needle tip. The third groove has a triangular frustum structure, and the area of the end of the third groove closer to the first groove is larger than the area of the end away from the first groove.
[0015] Using the above technical solution, the debris can be further guided and discharged through the No. 3 tank.
[0016] Compared with the prior art, the beneficial effects of this utility model are: the large-core, thick, bending-resistant recycled tungsten carbide drill bit: 1. The No. 1 and No. 2 needle bodies are designed as a large-core, tapered structure in the shape of a frustum. Combined with the high strength of recycled tungsten steel, the bending deformation of the drill bit during drilling is reduced. Compared with the traditional equal-diameter needle body, the tapered design of the No. 1 and No. 2 needle bodies increases their ability to resist radial pressure, thereby increasing the rigidity of the drill bit and preventing needle body displacement caused by uneven force during drilling, thus reducing positional displacement during drilling. 2. A second groove is set on the surface of the needle tip, which is connected to the spiral first groove of the second needle body. The first groove is connected to the third groove of the first needle body, forming a complete chip removal channel from the needle tip to the first needle body. The chip generated by drilling is transported outward along the through-path. The third groove has a larger area near the first groove, which can expand the chip removal diameter and prevent chip blockage in the channel. 3. Two slots are symmetrically arranged for slot 1, slot 2 and slot 3, which can make the drill bit bear the force evenly, and make the stability stronger when rotating and drilling, thereby extending the service life of the drill bit. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a front view structural diagram of the present invention; Figure 3 This is a schematic diagram of the No. 2 needle body structure of this utility model; Figure 4 This is a schematic diagram of the structure of the first needle body of this utility model.
[0018] In the diagram: 1. Drill shank; 2. Needle body No. 1; 3. Needle body No. 2; 4. Needle tip; 5. Groove No. 1; 6. Groove No. 2; 7. Groove No. 3. Detailed Implementation
[0019] 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.
[0020] Please see Figures 1-4 This utility model provides a technical solution: a thick-core, bending-resistant recycled tungsten steel drill bit, including a drill bit shank 1, a first needle body 2, a second needle body 3, a needle head 4, a first groove 5, a second groove 6, and a third groove 7.
[0021] The drill bit shank 1 is a cylindrical structure made of recycled tungsten carbide. A first needle body 2 is fixedly mounted on one end of the drill bit shank 1. A second needle body 3 is fixedly mounted on the end of the first needle body 2 away from the drill bit shank 1. A needle tip 4 is located on the end of the second needle body 3 away from the first needle body 2. The first needle body 2, the second needle body 3, and the needle tip 4 are all made of recycled tungsten carbide. The drill bit shank 1, the first needle body 2, the second needle body 3, and the needle tip 4 together constitute a complete drill bit structure. The first needle body 2 has a frustum-shaped structure. The end of the first needle body 2 closest to the second needle body 3 has a smaller diameter frustum-shaped top. The outer surface of the end where the first needle body 2 connects to the second needle body 3 has a chamfered edge for a smooth connection. The second needle body 3 has a frustum-shaped structure. The end of the second needle body 3 closest to the first needle body 2 has a larger diameter frustum-shaped bottom. The other end of the second needle body 3 is... The needle head 4 and the second needle body 3 are integrally formed. The outer surface of the second needle body 3 is provided with a first groove 5. The first groove 5 has a spiral structure. Two first grooves 5 are symmetrically arranged on the outer surface of the second needle body 3. The two first grooves 5 pass through both ends of the second needle body 3. The surface of the needle head 4 is provided with a second groove 6. The cross-section of the second groove 6 is a triangular structure. The second groove 6 is connected to one end of the first groove 5. Two second grooves 6 are symmetrically arranged on the surface of the needle head 4. The outer surface of the first needle body 2 is provided with a third groove 7. Two third grooves 7 are symmetrically arranged on the outer surface of the first needle body 2. The third groove 7 is connected to the end of the first groove 5 away from the needle head 4. The third groove 7 has a triangular truncated pyramid structure. The area of the end of the third groove 7 closer to the first groove 5 is larger than the area of the end away from the first groove 5. like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the drill bit shank 1, needle body 2, needle body 3, and needle head 4 are made of recycled tungsten steel. The drill bit shank 1 is a cylindrical structure, while needle bodies 2 and 3 are both frustum-shaped structures. The connection end between needle body 3 and needle body 2 is achieved through chamfering for a smooth transition. By connecting the drill bit shank 1 to the chuck of the drilling equipment, this device can be used to drill holes in PCB boards. Since needle bodies 2 and 3 are frustum-shaped, thick-core tapered structures, the diameter of needle body 2 gradually decreases from the drill bit shank 1 towards needle body 3, and the diameter of needle body 3 gradually decreases from needle body 2 towards needle head 4. Combined with the high strength characteristics of recycled tungsten steel, this increases the drill bit's resistance to bending under radial pressure. During the drilling process, the complete chip removal channel formed by grooves 5, 6, and 7 on the surface of the device allows the chips to be smoothly discharged, preventing chip accumulation on the device surface.
[0022] Working principle: When using this thick-core, bending-resistant recycled tungsten steel drill bit, the drill bit shank 1 is fixed to the drilling equipment chuck, and the drilling equipment is started for drilling. At this time, the frustum-shaped structure of the first needle body 2 and the second needle body 3 can enhance the radial pressure resistance, reduce the bending deformation of the drill bit, prevent the needle head 4 from deviating, and ensure the accuracy of drilling. The tungsten steel material can further increase the overall strength of the device. During the drilling process, the triangular second groove 6 on the surface of the needle head 4 guides the debris, which is then transported through the spiral first groove 5 on the second needle body 3, which is connected to the second groove 6, and discharged through the triangular frustum-shaped third groove 7 on the first needle body 2, which is connected to the first groove 5, to prevent debris blockage. At the same time, the two sets of grooves symmetrically arranged can ensure that the drill bit is subjected to uniform force, which increases the overall practicality.
[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A thick-core, bending-resistant recycled tungsten carbide drill bit, comprising a drill bit shank (1), wherein the drill bit shank (1) is a cylindrical structure made of recycled tungsten carbide, characterized in that: One end of the drill bit handle (1) is fixedly installed with a first needle body (2). The end of the first needle body (2) away from the drill bit handle (1) is fixedly installed with a second needle body (3). The end of the second needle body (3) away from the first needle body (2) is provided with a needle tip (4). The first needle body (2), the second needle body (3) and the needle tip (4) are all made of recycled tungsten steel. The drill bit handle (1), the first needle body (2), the second needle body (3) and the needle tip (4) together constitute a complete drill bit structure.
2. The thick-core, bending-resistant regenerated tungsten carbide drill bit according to claim 1, characterized in that: The first needle body (2) has a frustum-shaped structure. The end of the first needle body (2) near the second needle body (3) has a small diameter frustum-shaped top. The outer surface of the end where the first needle body (2) connects to the second needle body (3) is chamfered and smoothly connected to the second needle body (3).
3. The thick-core, bending-resistant recycled tungsten carbide drill bit according to claim 1, characterized in that: The second needle body (3) has a frustum-shaped structure. The end of the second needle body (3) near the first needle body (2) has a large diameter frustum-shaped bottom. The needle head (4) at the other end of the second needle body (3) is integrally formed with the second needle body (3).
4. The thick-core, bending-resistant regenerated tungsten carbide drill bit according to claim 1, characterized in that: The outer surface of the second needle body (3) is provided with a first groove (5). The first groove (5) has a spiral structure. Two first grooves (5) are symmetrically arranged on the outer surface of the second needle body (3). The two first grooves (5) pass through both ends of the second needle body (3).
5. The thick-core, bending-resistant regenerated tungsten carbide drill bit according to claim 1, characterized in that: The surface of the needle (4) is provided with a second groove (6), the cross-section of the second groove (6) is a triangular structure, the second groove (6) is connected to one end of the first groove (5), and two second grooves (6) are symmetrically arranged on the surface of the needle (4).
6. The thick-core, bending-resistant regenerated tungsten carbide drill bit according to claim 1, characterized in that: The outer surface of the first needle body (2) is provided with a third groove (7). Two third grooves (7) are symmetrically arranged on the outer surface of the first needle body (2). The third groove (7) is connected to the end of the first groove (5) away from the needle tip (4). The third groove (7) is a triangular truncated pyramid structure. The area of the end of the third groove (7) close to the first groove (5) is larger than the area of the end away from the first groove (5).