A five-wing flat-top nine-tooth anti-tuberculosis drill bit

Abstract

The invention discloses a five-wing flat-top nine-tooth anti-tuberculosis drill bit, comprising a drill bit base, a base connecting part, a drill bit body connecting part and drill bit teeth, wherein the drill bit teeth are divided into an external cutting group and an internal cutting group; the drill bit teeth of the external cutting group are symmetrically arranged into five, namely a first cutting head, a second cutting head, a third cutting head, a fourth cutting head and a fifth cutting head, and a drill bit body connecting part is arranged between the drill bit teeth and the base connecting part; the drill bit teeth of the internal cutting group are embedded in the drill bit base, and the drill bit teeth of the internal cutting group include four drill bit teeth, namely a sixth cutting head, a seventh cutting head, an eighth cutting head and a ninth cutting head; the problem that when mining a high-gas mine, the rock hardness is high, the drill bit is severely worn and it is difficult to drill during the drilling process is solved.

Description

Technical Field

[0001] The invention relates to a drill bit, in particular to a five-wing flat-top nine-tooth anti-tuberculosis drill bit. Background Art

[0002] In my country, the rocks in Guizhou Province are the hardest, and there are many pyrite nodules formed in the rocks and coal seams. Many coal mines are difficult to drill for gas extraction, which greatly affects the normal production of coal mines. The most typical example is the mining area in Jinsha County, Bijie District. The mines here are basically high-gas mines or protruding mines. The most concentrated underground pyrite nodules are the coal mines in Xinhua Township, Jinsha County and the major coal mines in Shatu Town. The hardness of pyrite nodules is basically the same as that of basalt and granite, but friction sparks are easily generated when drilling into the pyrite nodule rock layer. This friction flash temperature phenomenon will cause a high-temperature micro-carbonization reaction of the diamond composite blade, thereby causing friction fatigue of the diamond blade.

[0003] From mechanized mining to the current intelligent upgrade of coal mines, it cannot be ignored that for so many years, underground drilling machinery has been using tunnel hydraulic drills, and the drill bits have been using the original drill bits. These drill bits have been used in coal mines for more than ten years, and there has been no change in the tooth layout. For mines with higher hardness, the drilling life cannot exceed 100 meters. Until the year before last, the country began to eliminate small-function hydraulic tunnel drills and introduced a large number of high-power crawler drills. The propulsion torque and exploration distance of these advanced drills have been greatly improved. For example, the 4200 crawler drill has an effective drilling distance of 400 meters and a propulsion pressure of ≤22 MPa. The introduction of these drills has changed the progress of gas extraction in coal mines. Summary of the invention

[0004] The purpose of the present invention is to provide a five-wing flat-top nine-tooth anti-tuberculosis drill bit to solve the problem of high rock hardness, severe drill bit wear and difficulty in drilling when mining in high-gas mines.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A five-wing flat-top nine-tooth anti-tuberculosis drill bit, comprising a drill bit base, a base connecting part, a drill bit body connecting part and drill bit teeth, wherein the drill bit teeth are divided into an external cutting group and an internal cutting group; the drill bit base is configured as a solid cylindrical table, and a base connecting part is arranged around the outer circular top of the drill bit base, the base connecting part is configured as a quarter circle, and the external cutting group of drill bit teeth are centrally symmetrically arranged on the base connecting part; the external cutting group of drill bit teeth are symmetrically arranged in five parts, namely a first cutting head, a second cutting head, a third cutting head, a fourth cutting head and a fifth cutting head, and a drill bit body connecting part is arranged between the drill bit teeth and the base connecting part; the internal cutting group of drill bit teeth is embedded in the drill bit base, and the internal cutting group of drill bit teeth includes four drill bit teeth, namely a sixth cutting head, a seventh cutting head, an eighth cutting head and a ninth cutting head; the third cutting head is arranged flush with the seventh cutting head, the sixth cutting head is centrally symmetrically arranged with the seventh cutting head, the eighth cutting head is arranged perpendicular to the seventh cutting head, and the ninth cutting head is arranged at an angle with the eighth cutting head; Among them, the sixth cutting head and the seventh cutting head are arranged on the outside of the drill bit base, half of which occupies the drill bit base and the other half occupies the base connection part; the eighth cutting head and the ninth cutting head are arranged on the drill bit base; a cooling hole is arranged in the center of the drill bit base, and the cooling hole runs through the drill bit base.

[0007] Furthermore, the incisive drill bit teeth include a drill tooth seat and drill teeth; the front end of the drill tooth seat is set to be cylindrical, and the rear end is set to be conical, the drill tooth seat is fixedly set on the drill bit base, and the front end of the drill tooth seat is provided with a drill tooth fixing seat adapted to the drill teeth; the drill teeth are set to be cylindrical rings, and the drill teeth are embedded in the drill tooth fixing seat.

[0008] Furthermore, the drill cutter tooth seat of the inner cutting group of drill teeth is tilted and embedded on the drill base.

[0009] Furthermore, the externally cut drill bit teeth include a drill tooth seat, drill teeth and a reinforced fixing seat; the front end of the drill tooth seat is arranged in a cylindrical shape, and the rear end is arranged in a shape; the front end of the drill tooth seat is arranged in a drill tooth fixing seat adapted to the drill teeth; the drill teeth are arranged in a cylindrical ring, and the drill teeth are embedded in the drill tooth fixing seat; the reinforced fixing seat is arranged in a rectangle with the same width as the drill tooth seat, the drill tooth seat is fixedly arranged on the top of the reinforced fixing seat, the reinforced fixing seat is fixedly arranged on the base connecting part and embedded in one third of the thickness of the reinforced fixing seat, and the drill body connecting part is arranged in a concave arc between the reinforced fixing seat and the base connecting part.

[0010] Furthermore, the drill bit tooth seat of the externally cut group of drill teeth is horizontally arranged on the base connecting part.

[0011] Furthermore, a slag discharge groove is formed between the drill bit tooth seats of every two externally cut groups of drill bit teeth.

[0012] Furthermore, an inclined slag guide platform is arranged at the front end of the drill tooth seat, and the slag guide platform is located directly below the front end of the drill tooth.

[0013] Furthermore, two diameter-protecting grooves are arranged on the side of the reinforcing fixing seat.

[0014] Furthermore, the same track and same level outer circle cutting line of the internal cutting group is 3-5mm higher than the same track and same level outer circle cutting line of the external cutting group.

[0015] Furthermore, the drill bit base is set to high-strength steel, and the drill teeth are made of diamond, and the two are welded.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This device is designed from the outside to the inside. The central secondary circle of the inner cutting group crosses the full cutting surface without dead angles. The eighth cutting head overlaps the sixth cutting head, the seventh cutting head cuts independently, and the ninth cutting head overlaps the trajectory in the full cutting circle of the eighth cutting head. During hole drilling, the nine distributed teeth help each other to share the propulsion force and frictional heat effect of the drill rig. This device effectively increases the service life and reduces the friction strength and thermal effect of the composite piece during the drilling process through reasonable tooth number arrangement, tooth position arrangement, and corresponding slag removal and heat dissipation design. It also reduces the micro-carbonization reaction of the diamond cutting edge caused by friction flash temperature with pyrite nodules during drilling, as well as the friction fatigue of the diamond piece during high-intensity work. The most important thing is that this drill bit can effectively resist nodules. This device effectively avoids the problem of high rock hardness, severe drill bit wear, and difficulty in drilling during the drilling process when mining in high-gas mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the present invention.

[0019] Figure 2 It is a side view of the present invention.

[0020] In the figure, a drill base (1), a base connecting portion (2), a cooling hole (3), a drill body connecting portion (4), a drill tooth (5), a drill tooth seat (6), a diameter protection groove (7), a slag guide platform (8), a slag discharge groove (9), a reinforced fixing seat (10), a first cutting head (A1), a second cutting head (A2), a third cutting head (A3), a fourth cutting head (A4), a fifth cutting head (A5), a sixth cutting head (B1), a seventh cutting head (B2), an eighth cutting head (C1), and a ninth cutting head (D1). DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] Embodiment 1:

[0023] As shown in the figure, a five-wing flat-top nine-tooth anti-nodule drill bit is provided. This scheme provides a structure mainly used for breaking pyrite nodules. The effective hole diameter of this device is ≤93mm≥85mm, and the optimal nodule breaking drill bit diameter is φ85mm

[0024] It mainly includes a drill base 1, a base connection part 2, a drill body connection part 4 and drill teeth. In this device, the drill teeth are divided into an external cutting group and an internal cutting group. In order to facilitate installation, the drill base 1 is set as a solid cylindrical table. In order to facilitate smooth connection and to facilitate slag removal during use, a base connection part 2 is arranged on the outer circular top of the drill base 1. The base connection part 2 is set as a quarter circle, and the external cutting group drill teeth are arranged symmetrically on the base connection part 2. As shown in the figure, the external cutting group drill teeth of the device are symmetrically arranged in five, namely the first cutting head A1, the second cutting head A2, the third cutting head A3, the fourth cutting head A4, and the fifth cutting head A5. The drill body connection part 4 is arranged between the drill teeth and the base connection part 2; in the figure, the cutting produced by the first cutting head A1, the second cutting head A2, the third cutting head A3, the fourth cutting head A4, and the fifth cutting head A5 is a radial external cutting of the outer circle cutting line with the same track and the same level. As shown in the figure, the device is embedded with an inscribed group of drill teeth on the drill base 1, and the inscribed group of drill teeth includes four drill teeth, namely the sixth cutting head B1, the seventh cutting head B2, the eighth cutting head C1, and the ninth cutting head D1, wherein the sixth cutting head B1 and the seventh cutting head B2 are inner side outer circle cutting lines with the same track and level. The eighth cutting head C1 is the cutting track of the third middle circle waist line of the hole. The ninth cutting head D1 is the cutting track of the center of the hole circle. The tooth layout design of this drill bit is designed from the outside to the inside. First, determine the outer diameter to be cut, such as φ85mm in this design. After determining the outer diameter, design the drill teeth 5 for cutting. After designing the tooth shape, arrange the outer side of the same track and level outer circle cutting line for radial outer circle cutting. This device is set to have five teeth. Then, design the inner teeth according to the outer teeth. The third cutting head A3 and the seventh cutting head B2 of this device are arranged flush in position, the sixth cutting head B1 and the seventh cutting head B2 are arranged symmetrically, the eighth cutting head C1 is arranged perpendicular to the seventh cutting head B2, and the ninth cutting head D1 is arranged at 45 degrees to the eighth cutting head C1; wherein, the sixth cutting head B1 and the seventh cutting head B2 are arranged on the outside of the drill bit base 1, half of which occupy the drill bit base 1, and the other half occupy the base connecting part 2; the eighth cutting head C1 and the ninth cutting head D1 are arranged on the drill bit base 1.

[0025] In this design, the tooth arrangement design principle of the sixth cutting head B1, the seventh cutting head B2, the eighth cutting head C1, and the ninth cutting head D1 is that the central secondary circle crosses the full cutting surface without dead angles, the eighth cutting head C1 overlaps the sixth cutting head B1, the seventh cutting head B2 independently cuts the track, and the ninth cutting head D1 overlaps the track in the full cutting circle of the eighth cutting head C1. During the hole drilling, the nine distributed teeth help each other to share the propulsion force and friction heat effect of the drilling rig. In order to further cool the drill bit, a cooling hole 3 is provided in the center of the drill bit base 1, and the cooling hole 3 runs through the drill bit base 1. The design of this device has a service life of 1.5 times that of an ordinary four-wing flat-top eight-foot drill bit during use. For the traditional rock metal nodules and particularly hard rocks that are relatively rare on the surface, our company has come up with such a solution after years of research, mainly for the following four points:

[0026] (1) Reduce the diameter of the drilled hole;

[0027] (2) Increase the density of the tooth (diamond);

[0028] (3) Increase the number of side wing teeth;

[0029] (4) Improve the cooling holes and increase the width and depth of the slag discharge trough;

[0030] However, the hole diameter cannot be reduced as small as possible, but must be kept within a certain range. The density design of the teeth (diamond) is also a very complicated process. The area of ​​the entire drill bit is not allowed, the process does not allow it, and the operation does not allow it. The area is fixed, and it is impossible to arrange all the diamond teeth. When drilling, heat dissipation, friction loss, cutting force arrangement, etc. must be considered. It is impossible to increase the density at will. Arranging too densely is not practical in drilling operations, and it wastes materials and may not achieve the desired effect. Similarly, the increase in the number of side wing teeth is the same reason. Any increase cannot avoid two points: slag removal and heat dissipation. Therefore, improving the cooling holes and increasing the width and depth of the slag removal groove are also key points. This device effectively improves the service life through reasonable tooth number arrangement, tooth position arrangement, and corresponding slag removal and heat dissipation design, effectively reduces the friction intensity and thermal effect of the composite sheet during drilling, reduces the micro-carbonization reaction of the diamond blade caused by friction flash temperature with pyrite tuberculosis during drilling, and reduces the friction fatigue of the diamond sheet during high-intensity work. It effectively avoids the problem of high rock hardness, severe drill bit wear, and difficulty in drilling during drilling when mining in high-gas mines.

[0031] Embodiment 2:

[0032] On the basis of the above embodiments, in this embodiment, a design of drill teeth is that the incision group drill teeth includes a drill tooth seat 6 and a drill tooth 5; in order to balance the cutting force, the front end of the drill tooth seat 6 is set to a cylindrical shape, and the rear end is set to a conical shape. In this way, the cutting force during cutting will be transmitted from the tooth edge to the drill base 1 for dispersion. Therefore, it is necessary to fix the drill tooth seat 6 on the drill base 1, and the front end of the drill tooth seat 6 is provided with a drill tooth fixing seat adapted to the drill tooth 5. Its main purpose is to be used for square connection, because it is necessary to ensure the strength of the cutting edge, to dissipate heat, and to ensure that the friction loss is reduced as much as possible. The drill tooth 5 is set to a cylindrical ring, and the drill tooth 5 is embedded in the drill tooth fixing seat.

[0033] Embodiment 3:

[0034] Based on the above embodiments, in this embodiment, the drill tooth seat 6 of the inscribed group of drill teeth is tilted and embedded on the drill base 1. A specific setting is to set the drill welding elevation angle to 15 degrees, the outer angle to 3 degrees, and the inter-wing angle to 60 degrees.

[0035] Embodiment 4:

[0036] On the basis of the above embodiment, in this embodiment, a structure more convenient for slag removal and heat dissipation is to divide the external cutting group drill teeth into a drill tooth seat 6, a drill tooth 5 and a reinforced fixing seat 10. In this design, the balance of cutting force is that the front end of the drill tooth seat 6 is set to a cylindrical shape, and the rear end is provided with a shape; the front end of the drill tooth seat 6 is provided with a drill tooth fixing seat adapted to the drill tooth 5; the drill tooth 5 is set to a cylindrical ring, and the drill tooth 5 is embedded in the drill tooth fixing seat. During the external circle cutting process, the external cutting group drill teeth are subjected to a large radial cutting force, so it is necessary to strengthen the fixing seat 10. The strengthening fixing seat 10 of this design is set as a rectangle with the same width as the drill tooth seat 6. The drill tooth seat 6 is fixedly set on the top of the strengthening fixing seat 10. In order to facilitate slag removal and heat dissipation, the strengthening fixing seat 10 is fixedly set on the base connection part 2 and embedded in one third of the thickness of the strengthening fixing seat 10 to ensure the strength of the connection, and a slag removal groove 9 can be formed between the drill tooth seats 6 of every two external cutting groups of drill teeth to facilitate slag removal. The drill body connection part 4 is set in an arc shape between the strengthening fixing seat 10 and the base connection part 2. The entire outer wheel reservoir of the drill bit formed in this way is a smooth arc, which is convenient for slag discharge during the slag removal process. At the same time, it also forms a sheet-like heat dissipation, increases the heat dissipation area, and facilitates heat dissipation.

[0037] Embodiment 5:

[0038] On the basis of the above embodiments, in this embodiment, a further slag removal and heat dissipation structure is to horizontally set the drill tooth seat 6 of the external cutting group drill teeth on the base connecting part 2, and to provide an inclined slag guide platform 8 at the front end of the drill tooth seat 6, and the slag guide platform 8 is located directly below the front end of the drill tooth 5, and the same track and horizontal external circle cutting line of the internal cutting group is 2mm or 3mm or 4mm or 5mm higher than the same track and horizontal external circle cutting line of the external cutting group, and 3mm is the best. The 3mm partition wall will fall into 3mm small strip particles or 3mm small flake particles by itself during the friction of the drill bit from shallow to deep, which is convenient for slag removal.

[0039] The device retains wide and deep slag discharge ports between the wings of the first cutting head A1, the second cutting head A2, the third cutting head A3, the fourth cutting head A4, and the fifth cutting head A5, and retains a large-diameter cooling hole between the eighth cutting head C1 and the ninth cutting head D1 to serve the heat dissipation of drilling, that is, to facilitate slag discharge and heat dissipation.

[0040] Embodiment 6:

[0041] On the basis of the above embodiment, in this embodiment, in order to increase the heat dissipation effect and also to release part of the heat and protect the outer circle cutting, two diameter protection grooves 7 are provided on the side of the reinforcing fixing seat 10 .

[0042] Embodiment 7:

[0043] On the basis of the above embodiment, in this embodiment, one material selection is to set the drill bit base body 1 to high-strength steel, and the drill teeth 5 to be made of diamond, and the two are welded. In combination with the mechanism design of the device, it can drill normally under a propulsion force of 13 MPa without damaging the drill teeth.

[0044] When the drill bit is drilling into rocks and pyrite nodules, no matter whether water-cooling or air-cooling drilling is used, a large amount of heat energy and thermal effect will be generated in the friction between the drill bit and the rock. This thermal effect is a process that gradually weakens from the edge of the drill bit to the center of the drill bit. The edge teeth are impacted and subjected to very large forces. This device adopts a five-wing five-tooth same-track layout, which can share the ultimate pressure-bearing capacity of each diamond. When the nine teeth in the drill bit are working, the working heat energy of each piece is also divided into a strong friction and high-heat semicircle zone and a weak friction and low-heat semicircle zone.

[0045] All drill bits show energy weakening from the outside to the inside. The outer teeth are subject to the greatest force (the first cutting head A1, the second cutting head A2, the third cutting head A3, the fourth cutting head A4, and the fifth cutting head A5), the inner two rings are subject to the second greatest force (the sixth cutting head B1 and the seventh cutting head B2), and the inner three (the eighth cutting head C1) and the inner four (the ninth cutting head D1) are subject to the lightest force.

[0046] The harder the rock the drill bit encounters, the greater the thermal effect generated by drilling. If the drill bit encounters pyrite nodules, the thermal effect generated will be even greater. The flash sparks generated by grinding will cause micro-carbonization of the diamond blade and form friction fatigue and friction failure of the drill bit. This device can effectively reduce and avoid this.

[0047] The "one embodiment", "another embodiment", "embodiment", "preferred embodiment" and the like mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when a specific feature, structure or characteristic is described in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0048] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, drawings, and claims, a variety of variations and modifications may be made to the components and / or layout of the subject combination layout. In addition to the variations and modifications made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A five-wing flat-top nine-tooth anti-tuberculosis drill bit, characterized by: The drill bit comprises a drill base (1), a base connecting portion (2), a drill body connecting portion (4) and drill teeth, wherein the drill teeth are divided into an external cutting group and an internal cutting group; the drill base (1) is arranged as a solid cylindrical table, the base connecting portion (2) is arranged on the outer circular top of the drill base (1), the base connecting portion (2) is arranged in a quarter circle, and the external cutting group of drill teeth are arranged symmetrically on the base connecting portion (2); the external cutting group of drill teeth are arranged symmetrically in five pieces, namely a first cutting head (A1), a second cutting head (A2), a third cutting head (A3), a fourth cutting head (A4) and a fifth cutting head (A5), and a drill body connecting portion (4) is arranged between the external cutting group of drill teeth and the base connecting portion (2); the internal cutting group of drill teeth are embedded in the drill base (1), and the internal cutting group of drill teeth includes four drill teeth, namely a sixth cutting head (A5), a second cutting head (A1), a third cutting head (A2), a fourth cutting head (A4) and a fifth cutting head (A5). The drill bit comprises a first cutting head (B1), a second cutting head (B2), a third cutting head (A3) and a seventh cutting head (B2); the third cutting head (A3) and the seventh cutting head (B2) are arranged flush with each other, the sixth cutting head (B1) and the seventh cutting head (B2) are arranged symmetrically with respect to the center, the eighth cutting head (C1) is arranged perpendicular to the seventh cutting head (B2), and the ninth cutting head (D1) and the eighth cutting head (C1) are arranged at 45 degrees; wherein the sixth cutting head (B1) and the seventh cutting head (B2) are arranged on the outside of the drill bit base (1), half of which occupies the drill bit base (1) and the other half occupies the base connecting portion (2); the eighth cutting head (C1) and the ninth cutting head (D1) are arranged on the drill bit base (1); a cooling hole (3) is arranged at the center of the drill bit base (1), and the cooling hole (3) passes through the drill bit base (1); The inscribed drill bit teeth group comprises a drill tooth seat (6) and a drill tooth (5); the front end of the drill tooth seat (6) is arranged in a cylindrical shape, and the rear end is arranged in a conical shape; the drill tooth seat (6) is fixedly arranged on the drill bit base body (1); the front end of the drill tooth seat (6) is provided with a drill tooth fixing seat adapted to the drill tooth (5); the drill tooth (5) is arranged in a cylindrical ring, and the drill tooth (5) is embedded in the drill tooth fixing seat; The drill bit tooth seat (6) of the inner cutting drill bit teeth is tilted and embedded on the drill bit base (1); The central secondary circle of the inner cutting group drill teeth intersects the full cutting surface without dead angles, the eighth cutting head (C1) overlaps the sixth cutting head (B1), the seventh cutting head (B2) independently cuts the track, and the ninth cutting head (D1) overlaps the track in the full cutting circle of the eighth cutting head (C1); The cutting produced by the first cutting head (A1), the second cutting head (A2), the third cutting head (A3), the fourth cutting head (A4), and the fifth cutting head (A5) is radial outer circle cutting with the same track and the same level outer circle cutting line; The cutting produced by the sixth cutting head (B1) and the seventh cutting head (B2) is an inner outer circle cutting line with the same track and level; The cutting produced by the eighth cutting head (C1) is the cutting trajectory of the third mid-circle waist line of the hole; The cutting produced by the ninth cutting head (D1) is a cutting trajectory of the center of the hole circle; The same track and same level outer circle cutting line of the inner cutting group drill teeth is 3-5mm higher than the same track and same level outer circle cutting line of the outer cutting group drill teeth.

2. A five-wing flat-top nine-tooth anti-tuberculosis drill bit according to claim 1, characterized in that: The externally cut drill bit teeth group comprises a drill tooth seat (6), a drill tooth (5) and a reinforced fixing seat (10); the front end of the drill tooth seat (6) is set to be cylindrical, and the rear end is set to be conical; the front end of the drill tooth seat (6) is provided with a drill tooth fixing seat adapted to the drill tooth (5); the drill tooth (5) is set to be a cylindrical ring, and the drill tooth (5) is embedded in the drill tooth fixing seat; the reinforced fixing seat (10) is set to be a rectangle with the same width as the drill tooth seat (6), the drill tooth seat (6) is fixedly set on the top of the reinforced fixing seat (10), the reinforced fixing seat (10) is fixedly set on the base connecting part (2) and embedded in one third of the thickness of the reinforced fixing seat (10), and the drill body connecting part (4) is set in an inwardly concave arc shape between the reinforced fixing seat (10) and the base connecting part (2).

3. A five-wing flat-top nine-tooth anti-tuberculosis drill bit according to claim 2, characterized in that: A slag discharge groove (9) is formed between the drill bit tooth seats (6) of every two externally cut groups of drill bit teeth.

4. A five-wing flat-top nine-tooth anti-tuberculosis drill bit according to claim 2, characterized in that: An inclined slag guide platform (8) is arranged at the front end of the drill tooth seat (6) of the externally cut drill bit teeth, and the slag guide platform (8) is located directly below the front end of the drill tooth (5).

5. The five-wing flat-top nine-tooth anti-tuberculosis drill bit according to claim 2, characterized in that: Two diameter-protecting grooves (7) are arranged on the side of the reinforcing fixing seat (10).

6. The five-wing flat-top nine-tooth anti-tuberculosis drill bit according to claim 2, characterized in that: The drill bit tooth seat (6) of the externally cut drill bit teeth is horizontally arranged on the base connecting part (2).

7. The five-wing flat-top nine-tooth anti-tuberculosis drill bit according to claim 1, characterized in that: The drill bit base (1) is made of high-strength steel, and the drill teeth (5) are made of diamond, and the two are welded.

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