A drag bit with flow channels

Abstract

The application discloses a drill bit with a flow guide groove and belongs to the technical field of drill bits, which comprises a drill bit, a cutting tooth body is arranged at the bottom end of the drill bit, a cutting tooth seat is arranged at the bottom end of the cutting tooth body, a plurality of groups of flow guide grooves are arranged on the outer surface of the cutting tooth body, an inlet is arranged at the top of the flow guide groove, an oblique side groove surface is arranged on one side of the flow guide groove, a plurality of groups of chip removal grooves are arranged at the bottom of the cutting tooth body, an outward expanding cavity is arranged at the bottom of the chip removal groove, the flow guide grooves and the chip removal grooves located on the same vertical shaft are communicated, a plurality of groups of communication grooves are arranged on the outer surface of the cutting tooth body, and the two adjacent groups of chip removal grooves are communicated through the communication grooves; the application effectively reduces the possibility of accumulation of debris, greatly reduces the maintenance frequency, and improves the overall working efficiency.

Description

Technical Field

[0001] This application relates to the field of drilling rig cutting tool technology, and in particular to a drilling rig cutting tool with a guide groove. Background Technology

[0002] In mining, tunnel excavation and other engineering projects, drilling rig cutting teeth advance and cut through the rock by impact rotation, and are the core components for rock cutting.

[0003] During the operation of traditional drilling rig cutting tools, rock debris generated during cutting tends to accumulate in the working area of ​​the cutting tool. The accumulated debris will hinder the normal cutting of the cutting tool and reduce drilling efficiency. Although some existing cutting tools have simple chip removal structures, the chip removal grooves have a single shape design, limited chip removal effect, and are prone to clogging, resulting in high maintenance frequency and low work efficiency.

[0004] Therefore, this application provides a drill cutting tooth with a guide groove. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a drill bit with a guide groove, which overcomes the deficiencies of existing technologies. It aims to solve the problem that during the operation of traditional drill bits, rock debris generated during cutting tends to accumulate in the working area of ​​the bit, which hinders normal cutting and reduces drilling efficiency. Although some existing bits have simple chip removal structures, the chip removal grooves have a single shape design, limited chip removal effect, and are prone to clogging, resulting in high maintenance frequency and low working efficiency.

[0006] To achieve the above objectives, this application provides the following technical solution: a drill bit with guide grooves, comprising a drill bit, a cutter body mounted at the bottom end of the drill bit, a cutter seat mounted at the bottom end of the cutter body, a plurality of guide grooves formed on the outer surface of the cutter body, an inlet provided at the top of the guide grooves, an inclined side groove surface provided on one side of the guide grooves, a plurality of chip removal grooves formed at the bottom of the cutter body, an outward expansion cavity formed at the bottom of the chip removal grooves, the guide grooves and chip removal grooves located on the same vertical axis being connected, and a plurality of connecting grooves formed on the outer surface of the cutter body, wherein two adjacent sets of chip removal grooves are connected through the connecting grooves.

[0007] By adopting the above technical solution, during the operation of the drill bit, the rock chips generated from cutting first enter the guide groove through the inlet. The inclined side groove further guides the chips, causing them to quickly enter the chip removal groove in a specific direction. The expanded cavity at the bottom of the chip removal groove increases the chip removal space, preventing chips from clogging at the bottom of the chip removal groove and allowing them to be discharged more smoothly. Furthermore, adjacent chip removal grooves are connected by connecting grooves, so that when chips accumulate, they can enter adjacent chip removal grooves through the connecting grooves and be discharged. This enhances the connectivity between several sets of chip removal grooves, effectively reducing the possibility of chip accumulation, greatly reducing maintenance frequency, and improving overall work efficiency.

[0008] As a preferred technical solution of this application, the inclination angle of the inclined side groove is 20 degrees, and the inclination angle of the outer expansion cavity is 30 degrees.

[0009] By adopting the above technical solution, the inclination angle of the inclined side groove is 20 degrees, which allows the debris to enter the chip discharge groove quickly along a specific direction at a more suitable angle. After the debris enters the chip discharge groove, the inclination angle of the outer expansion cavity is 30 degrees, which allows the debris to flow downward faster under the combined action of gravity and centrifugal force, so that the debris can be discharged more smoothly through the chip discharge groove, thus optimizing the chip discharge path and improving the smoothness and efficiency of chip discharge.

[0010] As a preferred technical solution of this application, a number of sets of wear-resistant protrusions are fixedly installed on the outer surface of the drill bit, and the number of sets of wear-resistant protrusions are distributed alternately from top to bottom along the outer surface of the drill bit.

[0011] By adopting the above technical solution, when the drill bit rubs against the rock, the wear-resistant convex rings help the drill bit bear part of the friction and impact force. At the same time, the alternating wear-resistant convex rings can form a certain buffer and support structure on the surface of the drill bit, disperse stress, effectively reduce the wear and damage of the drill bit caused by excessive local stress, improve the protection effect of the drill bit, and help extend the service life of the drill bit.

[0012] As a preferred technical solution of this application, the guide channel is in the shape of an inverted trumpet, and the top of the inlet and the bottom of the chip discharge channel are both in the shape of an irregular U.

[0013] By adopting the above technical solution, the inverted funnel-shaped guide channel has a larger inlet area, which can more widely accept rock debris generated by cutting. As the guide channel contracts towards the chip removal channel, it can gather and accelerate the debris, making it easier for it to enter the chip removal channel in a concentrated manner. The irregular U-shaped design of the top of the inlet and the bottom of the chip removal channel increases the cross-sectional area of ​​the auxiliary chip removal channel at the same depth, expands the chip entry range, and improves chip removal efficiency.

[0014] As a preferred technical solution of this application, several groups of the guide grooves and chip removal grooves are evenly distributed along the circumferential surface of the cutting tooth body, and the number of the guide grooves and chip removal grooves is at least 5 groups.

[0015] By adopting the above technical solution, with at least 5 sets of guide grooves and chip removal grooves evenly distributed along the circumference of the cutting tooth body, it is ensured that the chips generated by the cutting tooth body at each rotation angle have the opportunity to enter the chip removal groove, thereby improving the comprehensiveness of chip removal.

[0016] As a preferred technical solution of this application, the inner walls of the flow guide groove and the chip removal groove are coated with a lubricating layer, which is a polytetrafluoroethylene layer.

[0017] By adopting the above technical solution, the friction between the debris and the walls of the guide channel and the chip discharge channel can be reduced through the polytetrafluoroethylene layer, making it easier for the debris to slide and be discharged in the channel, thus improving the chip discharge efficiency.

[0018] As a preferred technical solution of this application, the outer surfaces of the drill bit and the cutting tooth body are coated with a wear-resistant layer, which is a carbide coating.

[0019] By adopting the above technical solution, the carbide coating has the characteristics of high hardness, high wear resistance and good thermal stability. The wear-resistant layer forms a hard protective film on the surface of the drill bit and cutting tool, which improves the wear resistance of the drill bit and cutting tool. At the same time, the good thermal stability of the carbide coating can ensure that it can still maintain its wear resistance under the high temperature generated by high-speed drilling, thereby extending the service life of the drill bit and cutting tool.

[0020] As a preferred technical solution of this application, the connecting groove is inclined downwards.

[0021] By adopting the above technical solution, and by setting the connecting groove downwards, when debris gets stuck at the small opening at the connection between the guide groove and the chip removal groove, it is easier for it to flow from the higher chip removal groove to the lower chip removal groove, forming a natural chip removal flow trend, avoiding the accumulation of debris in a certain chip removal groove, and further improving the chip removal effect.

[0022] The beneficial effects of this application are: 1. During drill bit operation, rock chips generated from cutting first enter the guide groove through the inlet. The inclined side groove further guides the chips, causing them to quickly enter the chip removal groove in a specific direction. The expanded cavity at the bottom of the chip removal groove increases the chip removal space, preventing chips from clogging at the bottom and allowing them to be discharged more smoothly. Adjacent chip removal grooves are connected by connecting grooves, so that when chips accumulate, they can enter adjacent chip removal grooves and be discharged afterward. This enhances the connectivity between several sets of chip removal grooves, effectively reducing the possibility of chip accumulation, greatly reducing maintenance frequency, and improving overall work efficiency.

[0023] 2. The inclination angle of the inclined side groove is 20 degrees, which allows the debris to enter the chip discharge groove quickly along a specific direction at a more suitable angle. After the debris enters the chip discharge groove, the inclination angle of the outer expansion cavity is 30 degrees, which allows the debris to flow downward faster under the combined action of gravity and centrifugal force, so that the debris can be discharged more smoothly through the chip discharge groove, optimizing the chip discharge path and improving the smoothness and efficiency of chip discharge. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a top view of the structure of this application; Figure 3 A schematic cross-sectional view of the flow guide channel and the chip removal channel; Figure 4 for Figure 1 Enlarged structural diagram at point A in the middle.

[0025] In the diagram: 1. Drill bit; 2. Cutting tooth body; 3. Guide groove; 301. Inlet; 302. Inclined side groove surface; 4. Chip removal groove; 401. Outer expansion cavity; 5. Connecting groove; 6. Cutting tooth seat; 7. Wear-resistant convex ring; 8. Lubricating layer. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] Reference Figure 1-4A drilling rig cutting tooth with guide grooves includes a drill bit 1, a cutting tooth body 2 installed at the bottom end of the drill bit 1, a cutting tooth seat 6 installed at the bottom end of the cutting tooth body 2, a plurality of guide grooves 3 formed on the outer surface of the cutting tooth body 2, an inlet 301 provided at the top of the guide grooves 3, an inclined side groove surface 302 provided on one side of the guide grooves 3, a plurality of chip removal grooves 4 formed at the bottom of the cutting tooth body 2, an outer expansion cavity 401 formed at the bottom of the chip removal grooves 4, the guide grooves 3 and chip removal grooves 4 located on the same vertical axis are connected, a plurality of connecting grooves 5 formed on the outer surface of the cutting tooth body 2, and adjacent chip removal grooves 4 are connected by connecting grooves 5; a plurality of wear-resistant convex rings 7 are fixedly installed on the outer surface of the drill bit 1, and the plurality of wear-resistant convex rings 7 are distributed alternately from top to bottom along the outer surface of the drill bit 1.

[0028] During the operation of drill bit 1, the rock chips generated from cutting first enter the guide groove 3 through inlet 301. The inclined side groove surface 302 further guides the chips, causing them to quickly enter the chip removal groove 4 in a specific direction. The outer expansion cavity 401 at the bottom of the chip removal groove 4 increases the chip removal space, preventing chips from clogging at the bottom of the chip removal groove 4 and allowing chips to be discharged more smoothly through the chip removal groove 4. Furthermore, adjacent chip removal grooves 4 are connected by connecting grooves 5, allowing chips to enter adjacent chip removal grooves through the connecting grooves 5 when they accumulate. The rear discharge enhances the connection between several sets of chip removal grooves 4, effectively reducing the possibility of chip accumulation, greatly reducing maintenance frequency, and improving overall work efficiency. When the drill bit 1 rubs against the rock, the wear-resistant convex ring 7 assists the drill bit 1 in bearing part of the friction and impact force. At the same time, the alternately distributed wear-resistant convex rings 7 can form a certain buffer and support structure on the surface of the drill bit 1, dispersing stress and effectively reducing the wear and damage caused by excessive local stress on the drill bit 1, improving the protection effect of the drill bit 1, and helping to extend the service life of the drill bit 1.

[0029] Reference Figure 1-3 The inclined angle of the sloping side groove 302 is 20 degrees, and the inclined angle of the outer expansion cavity 401 is 30 degrees; the guide groove 3 is in the shape of an inverted trumpet, and the top of the inlet 301 and the bottom of the chip discharge groove 4 are both in the shape of an irregular U. The inclined side groove surface 302 has an inclination angle of 20 degrees, which allows the chips to enter the chip removal groove 4 quickly along a specific direction at a more suitable angle. After the chips enter the chip removal groove 4, the inclination angle of the outer expansion cavity 401 is 30 degrees, which allows the chips to flow downward faster under the combined action of gravity and centrifugal force, so that the chips can be discharged more smoothly through the chip removal groove 4, optimizing the chip removal path and improving the smoothness and efficiency of chip removal. The inverted funnel-shaped guide groove 3 has a large inlet area, which can accommodate more rock chips generated by cutting. As the guide groove 3 contracts towards the chip removal groove 4, it can gather and accelerate the chips, making them easier to concentrate and enter the chip removal groove 4. The irregular U-shaped design of the top of the inlet 301 and the bottom of the chip removal groove 4 increases the cross-sectional area of ​​the auxiliary chip removal groove at the same depth, expands the chip entry range, and improves the chip removal efficiency.

[0030] Reference Figure 1-3 Several sets of guide grooves 3 and chip removal grooves 4 are evenly distributed along the circumference of the cutting tooth body 2, and the number of guide grooves 3 and chip removal grooves 4 is at least 5 sets. The outer surfaces of the drill bit 1 and the cutting tooth body 2 are coated with a wear-resistant layer, which is a carbide coating. By evenly distributing at least 5 sets of guide grooves 3 and chip removal grooves 4 along the circumference of the cutting tooth body 2, it is ensured that the chips generated by the cutting tooth body 2 at various rotation angles have the opportunity to enter the chip removal groove, thereby improving the comprehensiveness of chip removal. The carbide coating has the characteristics of high hardness, high wear resistance and good thermal stability. Through the wear-resistant layer, a hard protective film is formed on the surface of the drill bit 1 and the cutting tooth body 2, which improves the wear resistance of the drill bit 1 and the cutting tooth body 2. At the same time, the good thermal stability of the carbide coating can ensure that it can still maintain its wear resistance under the high temperature generated by high-speed drilling, thereby extending the service life of the drill bit 1 and the cutting tooth body 2.

[0031] Reference Figure 1-3 The inner walls of both the guide channel 3 and the chip removal channel 4 are coated with a lubricating layer 8, which is a polytetrafluoroethylene (PTFE) layer. The connecting channel 5 is inclined downwards. The PTFE layer reduces the friction between the debris and the walls of the guide channel 3 and the chip removal channel 4, making it easier for the debris to slide and be discharged in the channel, thus improving the chip removal efficiency. Because the connecting channel 5 is inclined downwards, when the debris gets stuck at the small opening at the connection between the guide channel 3 and the chip removal channel 4, it is easier for it to flow from the higher chip removal channel 4 to the lower chip removal channel 4, forming a natural chip removal flow trend, avoiding the accumulation of debris in a certain chip removal channel 4, and further improving the chip removal effect.

[0032] Working principle: During the operation of drill bit 1, the rock chips generated from cutting first enter the guide groove 3 through inlet 301. The inclined side groove surface 302 further guides the chips, causing them to quickly enter the chip removal groove 4 in a specific direction. The outer expansion cavity 401 at the bottom of the chip removal groove 4 increases the chip removal space, preventing chips from clogging at the bottom of the chip removal groove 4 and allowing the chips to be discharged more smoothly. Furthermore, adjacent chip removal grooves 4 are connected by connecting grooves 5, allowing chips to enter adjacent chip removal grooves through the connecting grooves 5 when they accumulate. The rear discharge enhances the connectivity between several sets of chip discharge grooves 4, effectively reducing the possibility of chip accumulation, greatly reducing maintenance frequency, and improving overall work efficiency. The inclined side groove surface 302 has an inclination angle of 20 degrees, allowing chips to enter the chip discharge groove 4 quickly along a specific direction at a more suitable angle. After the chips enter the chip discharge groove 4, the inclination angle of the outer expansion cavity 401 is 30 degrees, which accelerates the downward flow of chips under the combined action of gravity and centrifugal force, allowing the chips to be discharged more smoothly through the chip discharge groove 4, optimizing the chip discharge path, and improving the smoothness and efficiency of chip discharge. When the drill bit 1 rubs against the rock, the wear-resistant convex ring 7 assists the drill bit 1 in bearing part of the friction and impact force. At the same time, the alternately distributed wear-resistant convex rings 7 can form a certain buffer and support structure on the surface of the drill bit 1, disperse stress, effectively reduce the wear and damage caused by excessive local stress on the drill bit 1, improve the protection effect of the drill bit 1, and help extend the service life of the drill bit 1. The inverted trumpet-shaped guide groove 3 has a large inlet area, which can more widely accept the rock chips generated by cutting. As the guide groove 3 shrinks towards the chip discharge groove 4, it can gather and accelerate the chips, making them easier to concentrate and enter the chip discharge groove 4. The irregular U-shaped design of the top of the inlet 301 and the bottom of the chip discharge groove 4 increases the cross-sectional area of ​​the auxiliary chip discharge groove at the same depth, expands the chip entry range, and improves the chip discharge efficiency. Meanwhile, by evenly distributing at least 5 sets of guide channels 3 and chip removal channels 4 along the circumference of the cutting tooth body 2, it is ensured that the chips generated by the cutting tooth body 2 at each rotation angle have the opportunity to enter the chip removal channel, thereby improving the comprehensiveness of chip removal; the polytetrafluoroethylene layer can reduce the friction between the chips and the walls of the guide channels 3 and chip removal channels 4, making it easier for the chips to slide and be discharged in the channel, thereby improving the chip removal efficiency. In addition, the carbide coating has the characteristics of high hardness, high wear resistance and good thermal stability. The wear-resistant layer forms a hard protective film on the surface of drill bit 1 and cutting tooth body 2, which improves the wear resistance of drill bit 1 and cutting tooth body 2. At the same time, the good thermal stability of the carbide coating can ensure that it can maintain its wear resistance even when high temperature is generated during high-speed drilling, thereby extending the service life of drill bit 1 and cutting tooth body 2. Because the connecting groove 5 is set downward, when the chips are stuck at the small opening end of the connection between the guide groove 3 and the chip removal groove 4, it is easier to flow from the higher chip removal groove 4 to the lower chip removal groove 4, forming a natural chip removal flow trend, avoiding the accumulation of chips in a certain chip removal groove 4, and further improving the chip removal effect.

[0033] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application 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 this application should be included within the protection scope of this application.

Claims

1. A drill bit with a guide groove, comprising a drill bit (1), characterized in that, The bottom end of the drill bit (1) is equipped with a cutting tooth body (2), and the bottom end of the cutting tooth body (2) is equipped with a cutting tooth seat (6). The outer surface of the cutting tooth body (2) is provided with several sets of guide grooves (3). The top of the guide groove (3) is provided with an inlet (301). One side of the guide groove (3) is provided with an inclined side groove surface (302). The bottom of the cutting tooth body (2) is provided with several sets of chip removal grooves (4). The bottom of the chip removal groove (4) is provided with an outer expansion cavity (401). The guide groove (3) and the chip removal groove (4) located on the same vertical axis are connected. The outer surface of the cutting tooth body (2) is provided with several sets of connecting grooves (5). Two adjacent sets of chip removal grooves (4) are connected through the connecting grooves (5).

2. A drilling cutter with a guide groove according to claim 1, characterized in that, The inclination angle of the inclined side groove (302) is 20 degrees, and the inclination angle of the outer expansion cavity (401) is 30 degrees.

3. A drilling cutter with a guide groove according to claim 1, characterized in that, Several sets of wear-resistant protruding rings (7) are fixedly installed on the outer surface of the drill bit (1), and the several sets of wear-resistant protruding rings (7) are distributed alternately from top to bottom along the outer surface of the drill bit (1).

4. A drilling cutter with a guide groove according to claim 1, characterized in that, The guide channel (3) is in the shape of an inverted trumpet, and the top of the inlet (301) and the bottom of the chip discharge channel (4) are both in the shape of an irregular U.

5. A drilling cutter with a guide groove according to claim 1, characterized in that, Several sets of the guide grooves (3) and chip removal grooves (4) are evenly distributed along the circumferential surface of the cutting tooth body (2), and the number of the guide grooves (3) and chip removal grooves (4) is at least 5 sets.

6. A drilling cutter with a guide groove according to claim 1, characterized in that, The inner walls of the flow guide groove (3) and the chip removal groove (4) are coated with a lubricating layer (8), which is a polytetrafluoroethylene layer.

7. A drilling cutter with a guide groove according to claim 1, characterized in that, The outer surfaces of the drill bit (1) and the cutting tooth body (2) are coated with a wear-resistant layer, which is a carbide coating.

8. A drilling cutter with a guide groove according to claim 1, characterized in that, The connecting groove (5) is inclined downward.

Images