Ball head drill bit

Abstract

The utility model discloses a ball head drill bit which comprises a drill bit body, a rod body, a cutter body, cutting teeth and a protective belt, the drill bit body is in a spherical segment shape, the rod body is arranged on the bottom face of the drill bit body, the cutter body is arranged on the rod body, the cutting teeth are arranged on the spherical surface of the drill bit body at intervals, and the protective belt is arranged on the spherical surface of the drill bit body and attached to the cutting teeth. According to the ball head drill bit, the drill bit is arranged to be in a spherical segment shape, stability and cutting capacity of drilling are remarkably improved, particularly, the ball head drill bit is excellent in performance in high-hardness and complex stratums, through the arrangement design of the cutting teeth and the protection function of the protection belt, the drill bit can drill more efficiently, meanwhile, the service life is longer, and the service life of the drill bit is prolonged. And wider drilling requirements are met.

Description

Technical Field

[0001] This utility model belongs to the field of drill bit technology, specifically relating to ball-head drill bits. Background Technology

[0002] In drilling engineering, the performance of the drill bit plays a crucial role in construction efficiency and drilling results. Traditional drill bit designs typically suffer from the following problems: when contacting rock formations, the large contact area and simple arrangement of ordinary drill bits easily lead to increased friction, reducing drilling efficiency; when facing complex, irregular formations or fractured rock formations, the drill bit's rotational efficiency and cutting performance are insufficient, often resulting in jamming or deviation; in high-hardness rock formations or under intense impact environments, drill bit wear and cutting tooth damage are severe, leading to a shortened service life. Therefore, drill bits need to be improved to work more effectively in rock formations. Summary of the Invention

[0003] The purpose of this utility model is to provide a ball-head drill bit, which, by setting the drill bit into a spherical shape and adding cutting teeth and a protective strip, helps the drill bit move more flexibly in rock formations, reduces friction between the drill bit and the rock formation, and improves work efficiency.

[0004] To achieve the above objectives, this utility model is implemented through the following solution:

[0005] A ball-head drill bit includes a drill bit, a shaft, a cutting edge, cutting teeth, and a protective strip. The drill bit is spherical in shape. The shaft is disposed on the bottom surface of the drill bit. The cutting edge is disposed on the shaft. Multiple cutting teeth are disposed at intervals on the spherical surface of the drill bit. The protective strip is disposed on the spherical surface of the drill bit and fits against the cutting teeth.

[0006] Furthermore, the drill bit has a mounting hole on its spherical top surface, and the cutting teeth are disposed in the mounting hole.

[0007] Furthermore, the cutting teeth are distributed in a circular or spiral shape.

[0008] Furthermore, the cutting tooth includes a tooth head and a tooth bar, the tooth head and the tooth bar are connected and integrally formed, the tooth bar is disposed in the mounting hole, and the tooth head is disposed outside the mounting hole.

[0009] Furthermore, one or more protective strips are provided downward along the ball head of the drill bit and are arranged in a circular or spiral shape to protect the cutting teeth. The top of the protective strip is 1-2 cm lower than the top of the tooth.

[0010] Furthermore, the blade body is arranged in a spiral shape along the rod body.

[0011] Compared with the prior art, the advantages of this utility model are as follows: By setting the drill bit into a spherical shape, this utility model significantly improves the stability and cutting ability of drilling, especially in high-hardness and complex formations. Through the arrangement design of the cutting teeth and the protection of the protective strip, the drill bit can not only drill more efficiently, but also has a longer service life, adapting to a wider range of drilling needs. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 This is a structural schematic diagram of the ball-head drill bit of this utility model;

[0014] Figure 2 This is a schematic diagram of the cutting tooth structure of the ball-head drill bit of this utility model.

[0015] Reference numerals: 1. Drill bit; 2. Rod body; 3. Cutting tool body; 4. Cutting tooth; 401. Tooth head; 402. Tooth rod; 5. Protective strip. Detailed Implementation

[0016] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0018] Specific implementation examples are given below.

[0019] Please see Figure 1-2This utility model provides a ball-head drill bit, including a drill bit 1, a shaft 2, a cutter body 3, cutting teeth 4, and a protective strip 5. The drill bit 1 is spherical in shape, and its diameter depends on the diameter of the borehole. The shaft 2 is fixed to the bottom surface of the drill bit 1 by welding or integral molding. The cutter body 3 is spirally arranged along the circumference of the shaft 2 by welding or integral molding. The spherical top surface of the drill bit 1 has a mounting hole, and the cutting teeth 4 are arranged in the mounting hole. Multiple cutting teeth 4 are provided, and their number depends on the diameter of the drill bit 1. Multiple cutting teeth 4 are spaced apart along the spherical surface of the drill bit 1 and distributed in a circular or spiral shape. This arrangement helps to improve the contact efficiency between the drill bit 1 and the rock strata, and at the same time provides better cutting performance. The cutting teeth 4 include a tooth head 401 and a tooth shank 402. 1. The drill bit 1 is integrally formed with the tooth rod 402. The tooth rod 402 is welded and fixed inside the mounting hole, and the tooth head 401 protrudes outside the mounting hole. A protective strip 5 is provided around the tooth head 401. The protective strip 5 is welded and fixed to the spherical surface of the drill bit 1 and fits against the cutting tooth 4. The top of the protective strip 5 is 1-2 cm lower than the top of the tooth head 401. One or more protective strips 5 are set downward along the top of the spherical head of the drill bit 1 and are arranged in a circular or spiral shape according to the distribution of the cutting tooth 4. This arrangement can disperse the pressure generated during drilling to a larger area of ​​the drill bit 1, reduce excessive wear or deformation of the cutting tooth 4 caused by excessive local pressure, and prevent the cutting tooth 4 from cracking or falling off. When encountering uneven or cracked rock formations, the protective strip 5 can disperse the impact force and reduce damage to the cutting tooth 4. Figure 1 As shown, the protective strip 5 is distributed in a circular pattern and is made of steel.

[0020] The spherical design of drill bit 1 allows its spherical surface to contact the rock formation, reducing friction with the rock surface during drilling. Drill bit 1 rotates more smoothly, reducing unnecessary wear and extending its service life. The spherical design also distributes contact pressure more evenly, preventing significant jamming or excessive friction in rock formations with varying hardness. Drill bit 1 can rotate freely in the rock formation and continue drilling, especially in soft rock or muddy strata. This avoids the severe vibrations that sharp drill bits might cause, reducing equipment damage and improving drilling accuracy, particularly for operations requiring precise control of the drilling path. The teeth 401 slightly extend beyond the protective strip 5 to ensure direct contact between the cutting teeth 4 and the rock formation during drilling, enabling effective cutting. The protective strip 5 primarily serves to protect the cutting teeth. The protective strip 5 serves to strengthen the stability and structural strength of the cutting tooth 4, preventing excessive wear during drilling. In harder formations or rocks, the drill bit 1 and the cutting tooth 4 will face higher impact forces. The protective strip 5 can effectively protect the cutting tooth 4 from external impacts, dispersing the pressure generated during drilling to a larger area of ​​the drill bit 1, reducing excessive wear or deformation of the cutting tooth 4 caused by excessive local pressure, and preventing cracks or breakage of the cutting tooth 4. When encountering uneven or cracked rock formations, the protective strip 5 can disperse the impact force, reduce damage to the cutting tooth 4, and avoid direct participation in cutting, thus avoiding frictional wear with the rock formation and maximizing the sharpness and cutting efficiency of the cutting tooth 4. Under certain working conditions, it can also reduce the wear between the cutting tooth 4 and the drill bit 1 body, preventing direct contact between the cutting tooth 4 and the drill bit 1 base, thereby improving the stability and service life of the drill bit 1. In complex geological conditions, such as when rock layers have irregular cracks or large differences in hardness, the design of this ball-head drill bit helps the drill bit 1 adapt to changing drilling environments. The protective function of the protective band 5 and the design of the cutting teeth 4 extending beyond the protective band 5 enable the drill bit 1 to perform more stably when facing harder or more cracked rock layers.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A ball end mill characterized by: The utility model provides a drill bit (1), rod body (2), sword body (3), pick (4) and protective band (5), the drill bit (1) is spherical segment shape, the rod body (2) is arranged at the bottom of drill bit (1), the sword body (3) is arranged on rod body (2), the pick (4) is provided with multiple, multiple picks (4) are arranged at the spherical surface of drill bit (1) interval, the protective band (5) is arranged on the spherical surface of drill bit (1) and is in close contact with pick (4).

2. The ball-end mill according to claim 1, characterized in that: The spherical top surface of the drill bit (1) is provided with a mounting hole, and the pick (4) is arranged in the mounting hole.

3. The ball-end mill according to claim 2, characterized in that: The pick (4) is circular or spiral.

4. The ball-end mill according to claim 3, characterized in that: The pick (4) includes a tooth head (401) and a tooth rod (402), the tooth head (401) is connected with the tooth rod (402) and is integrally formed, the tooth rod (402) is arranged in the mounting hole, and the tooth head (401) is arranged outside the mounting hole.

5. The ball-end mill according to claim 4, characterized in that: The protective band (5) is arranged downward along the ball head of the drill bit (1) one or more, and is circular or spiral in close contact with the pick (4), so as to protect the pick (4), and the top of the protective band (5) is 1-2cm lower than the top of the tooth head (401).

6. The ball-end mill according to claim 1, characterized in that: The sword body (3) is arranged in a spiral along the rod body (2) and is integrally formed with the rod body.

Images