Drill bit and iron drill

Abstract

According to the drill bit and the iron drill, the drill bit is integrally formed, the possibility of breakage and falling between a drill bit body and a cutting edge is reduced, in addition, by means of integral forming, the strength of the drill bit made of silicon carbide and other materials can be improved, the brittleness is reduced, the possibility of drill bit damage is reduced, the durability of the drill bit is improved, the service life of the drill bit is prolonged, and the iron notch drilling efficiency is improved. The two ends of the columnar drill bit body of the drill bit are configured to be the crown part and the connecting part respectively, the maximum distance between each blade and the axis of the drill bit body is the same, the damage possibility of the drill bit can be reduced, drilling of the hole in the iron notch is facilitated, and the iron notch drilling efficiency is improved. The connecting part of the drill bit is matched with the drill rod through the external threads, so that the drill bit can be screwed into the drill rod, the brittle fracture risk of the drill bit is reduced, the damage risk of the drill bit can also be reduced, and the iron notch drilling efficiency can also be improved without frequently replacing the drill bit.

Description

Technical Field

[0001] The present application belongs to the technical field of blast furnace iron mouth drill bits, and in particular relates to a drill bit and an iron opening machine. Background Art

[0002] The iron mouth of the blast furnace is a process channel for discharging slag and iron in the furnace. The iron mouth needs to be opened and blocked repeatedly. When the iron mouth is opened, it is necessary to control the drill rod to penetrate into the iron mouth and make the drill bit at the end of the drill rod act on the iron mouth to open the iron mouth.

[0003] At present, the temperature inside the iron mouth of the blast furnace is relatively high, and the drill bit is consumed quickly and easily damaged when entering the iron mouth, which affects the efficiency of opening the iron mouth. Utility Model Content

[0004] The present application aims to solve the technical problem that the efficiency of tapping is affected to a certain extent. To this end, the present application provides a drill bit and a tapping machine.

[0005] In some embodiments, an embodiment of the present application provides a drill bit, the drill bit is used to cooperate with a drill rod thread, and the drill bit is integrally formed, and the drill bit includes:

[0006] A columnar drill bit body, with two ends respectively configured as a crown and a connecting portion, wherein the connecting portion is provided with an external thread for cooperating with the drill rod;

[0007] A plurality of cutting edges are circumferentially arranged on the crown portion around the crown portion, each of the cutting edges protrudes from the drill bit body in a radial direction of the drill bit body, and along the radial direction, a maximum distance between each of the cutting edges and an axis of the drill bit body is the same.

[0008] In some embodiments, the ratio of the axial length of the crown portion to the axial length of the connecting portion is 0.8:1 to 1.2:1.

[0009] In some embodiments, the blade extends from the crown portion to the connecting portion, and the blade is connected to the connecting portion by a chamfer.

[0010] In some embodiments, a side of the cutting edge away from the drill bit body is configured as an arc-shaped side surface, and the arc-shaped side surfaces corresponding to the plurality of cutting edges can be fitted to obtain a cylindrical surface.

[0011] In some embodiments, the drill bit body is provided with a central hole connecting the crown and the connecting portion, and a sinking groove surrounding the central hole, wherein the diameter of the sinking groove is larger than the diameter of the central hole and smaller than the diameter of the crown.

[0012] In some embodiments, the drill bit body is further provided with a cooling side opening, and the cooling side opening connects the sinking groove and the surface of the drill bit along the radial direction of the drill bit body.

[0013] In some embodiments, the crown is provided with a plurality of chip removal grooves corresponding one-to-one to the plurality of cutting edges, and the chip removal grooves connect the sinking groove and the peripheral wall of the crown.

[0014] The present application provides a tin-making machine, the tin-making machine comprising:

[0015] A machine body, a drill rod rotatably connected to the machine body, one end of which is provided with an internal thread;

[0016] As mentioned above, the external thread of the drill bit is threadably connected with the internal thread.

[0017] In some embodiments, the drill bit body is provided with a central hole connecting the crown portion and the connecting portion, and the drill rod is provided with a blowing hole connecting the central hole.

[0018] In some embodiments, the iron opening machine further comprises:

[0019] The air blowing cooling device is used for blowing air into the air blowing hole to cool the drill rod and the drill bit.

[0020] Advantageous effects provided by one or more embodiments of the present application:

[0021] The drill bit is integrally formed to ensure that the drill bit and the base are an integrated structure, which can reduce the possibility of the drill bit body and the blade breaking and falling. In addition, the integrated forming can also increase the strength of drill bits made of materials such as silicon carbide, reduce brittleness, reduce the possibility of damage to the drill bit, and improve the durability and service life of the drill bit, so as to improve the efficiency of opening the iron mouth. The two ends of the columnar drill bit body of the drill bit are respectively configured as a crown and a connecting part. The drill bit body is provided with multiple blades in the circumferential direction of the crown. Each blade extends from the drill bit body in the radial direction of the drill bit body. In the radial direction of the drill bit body, the maximum distance between the multiple blades and the axis of the drill bit body is the same, which can make the force applied to the drill bit more uniform, reduce the possibility of damage to the drill bit, and when the drill rod rotates to rotate the drill bit, it is beneficial for the drill bit to drill a hole in the iron mouth of the blast furnace, which is beneficial to improve the efficiency of opening the iron mouth. The connecting part of the drill bit cooperates with the drill rod through an external thread, so the drill bit can be screwed into the inside of the drill rod. The drill rod can protect the drill bit, reduce the risk of brittle fracture of the drill bit, and also reduce the risk of damage to the drill bit. The efficiency of iron opening can be improved without frequent replacement of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A side view of a drill bit in some embodiments or certain embodiments of the present application is shown.

[0024] Figure 2 A top view of a drill bit in some embodiments or certain embodiments of the present application is shown.

[0025] Figure 3 A schematic structural diagram of a iron opening machine in some embodiments or certain embodiments of the present application is shown.

[0026] Figure numerals: 1. drill body; 11. crown; 12. connecting part; 13. chip groove; 14. center hole; 15. sinking groove; 16. cooling side opening; 2. blade; 21. arc-shaped side; 3. cylindrical surface; 4. chamfer; 10. drill rod; 101. air hole; 20. air blowing cooling device; 30. machine body. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] In the related art, there is a technical problem that the drill bit is damaged quickly and needs to be replaced frequently, which affects the efficiency of tapping. The embodiment of the present application provides a drill bit and a tapping machine, which can at least solve the above technical problems to a certain extent.

[0032] Figure 1 A side view of a drill bit in some embodiments or certain embodiments of the present application is shown, Figure 2 A top view of a drill bit in some embodiments or certain embodiments of the present application is shown, with reference to Figure 1 and Figure 2 In some embodiments, the present application provides a drill bit, which is used to cooperate with the drill rod 10 thread, and the drill bit is integrally formed, and the drill bit includes:

[0033] The drill head body 1 is cylindrical, and its two ends are respectively configured as a crown portion 11 and a connecting portion 12 . The connecting portion 12 is provided with an external thread for matching with the drill rod 10 .

[0034] A plurality of cutting edges 2 are circumferentially arranged on the crown 11 around the crown 11, each cutting edge 2 extends from the drill bit body 1 in the radial direction of the drill bit body 1, and along the radial direction of the drill bit body 1, the maximum distances between the plurality of cutting edges 2 and the axis of the drill bit body 1 are the same.

[0035] The drill bit is integrally formed to ensure that the drill bit and the base are an integrated structure, which can reduce the possibility of the drill bit body 1 and the blade 2 breaking and falling. In addition, the integral forming can also increase the strength of drill bits made of materials such as silicon carbide, reduce brittleness, reduce the possibility of damage to the drill bit, and improve the durability and service life of the drill bit, so as to improve the efficiency of opening the iron mouth. The two ends of the columnar drill bit body 1 of the drill bit are respectively configured as a crown 11 and a connecting portion 12. The drill bit body 1 is provided with a plurality of blades 2 in the circumferential direction of the crown 11. Each blade 2 extends from the drill bit body 1 in the radial direction of the drill bit body 1. In the radial direction of the drill bit body 1, the maximum distance between the plurality of blades 2 and the axis of the drill bit body 1 is the same, which can make the force applied to the drill bit more uniform, reduce the possibility of damage to the drill bit, and when the drill rod 10 rotates to rotate the drill bit, the drill bit can first drill a hole in the iron mouth of the blast furnace, which is conducive to improving the efficiency of opening the iron mouth. The connecting part 12 of the drill bit cooperates with the drill rod 10 through an external thread, so that the drill bit can be screwed into the drill rod 10. The drill rod 10 can protect the drill bit, reduce the risk of brittle fracture of the drill bit, and also reduce the risk of damage to the drill bit. The efficiency of opening the iron mouth can be improved without frequently replacing the drill bit.

[0036] The drill bit and the drill rod 10 are connected by threads, so when the drill bit is damaged, it is easy to replace and repair the drill bit and the drill rod 10. The blade 2 protrudes relative to the drill bit body 1 and can also provide a fulcrum, making it easier to replace the drill bit as a whole relative to the drill rod 10, which is also beneficial to improving the efficiency of opening the iron mouth.

[0037] In some embodiments, the drill bit may be a silicon carbide drill bit, and the drill bit may be integrally sintered to effectively increase the overall strength of the drill bit and reduce the overall brittleness of the drill bit, thereby increasing the service life of the drill bit, reducing damage to the drill bit and the frequency of replacement, and improving the efficiency of iron opening.

[0038] It should be noted that since the iron mouth of the blast furnace needs to be opened and blocked frequently, and each time the iron mouth is opened, the drill bit needs to penetrate into the iron mouth to a certain depth, and correspondingly, the drill bit and drill rod 10 need to be used to frequently open the high-temperature iron mouth, extend the service life of the drill bit or drill rod 10, and facilitate the replacement of the drill bit, which can help improve the efficiency of opening the iron mouth of the blast furnace.

[0039] In some embodiments, the side of the blade 2 away from the drill body 1 can be set as an arcuate side surface 21, and a plurality of arcuate side surfaces 21 can be fitted to obtain a cylindrical surface 3. The efficiency of drilling holes in the tap hole can be improved, so as to improve the efficiency of tap hole opening.

[0040] In some embodiments, the cross section of the drill body 1 and the plurality of blades 2 taken perpendicular to the axial direction of the drill body 1 may be in a windmill shape, which is beneficial to improving the cutting efficiency of the drill bit when the drill bit rotates in a certain direction.

[0041] In some embodiments, the drill bit may include four blades 2, each blade 2 having a thickness of 20 mm and a blade length of 15.5 mm, so that it can be used for most specifications of iron holes, thereby improving the versatility of the drill bit.

[0042] In some embodiments, the ratio of the axial length of the crown portion 11 to the axial length of the connecting portion 12 is 0.8:1 to 1.2:1.

[0043] When the ratio of the axial length of the crown 11 to the axial length of the connecting portion 12 is within the above range, the crown 11 of the drill bit and the blade 2 of the crown 11 are high in strength, the drill bit is not easily damaged, and the efficiency of opening the iron hole can be improved.

[0044] It should be noted that the ratio of the axial length of the crown 11 to the axial length of the connecting portion 12 may not be within the above range, which can also play a role in increasing the strength of the drill bit to a certain extent compared with the related art.

[0045] In some embodiments, the blade 2 extends from the crown portion 11 to the connecting portion 12 , and the blade 2 and the connecting portion 12 are connected via a chamfer 4 .

[0046] The blade 2 extends from the crown 11 to the connecting portion 12, and the blade 2 and the connecting portion 12 are connected by a chamfer 4, which can increase the connection strength between the connecting portion 12 and the blade 2, and the strength of the blade 2 and the connecting portion 12 can be improved, reducing the probability of drill bit damage and improving the efficiency of iron opening.

[0047] In some embodiments, the drill body 1 is provided with a central hole 14 connecting the crown 11 and the connecting portion 12 , and a sinking groove 15 surrounding the central hole 14 , wherein the diameter of the sinking groove 15 is larger than the diameter of the central hole 14 and smaller than the diameter of the crown 11 .

[0048] The center hole 14 and the sinking groove 15 can be used for ventilation, and can also be used for blowing and cooling the drill bit, reducing the probability of the drill bit body 1 being damaged by high temperature in the iron mouth, which is beneficial to improving the efficiency of frequent iron mouth opening. Dust or impurities can also be blown out from the sinking groove 15 and the center hole 14, which is beneficial to the efficiency of iron mouth opening.

[0049] In some embodiments, the drill bit body 1 is further provided with a cooling side opening 16 , and the cooling side opening 16 connects the sinking groove 15 with the surface of the drill bit along the radial direction of the drill bit body 1 .

[0050] The cooling side opening 16 can increase the space for gas outflow, improve the cooling effect on the drill body 1, and help to extend the overall life of the drill.

[0051] In some embodiments, the cooling side opening 16 may be connected to the peripheral wall of the crown 11 and the sinking groove 15 along the radial direction of the drill body 1. The cooling side opening 16 may penetrate a blade 2 along the radial direction of the drill body 1, or may be staggered with the blade 2 and connected to the peripheral wall of the crown 11. This application does not limit this.

[0052] In some embodiments, at least two cooling side openings 16 may be provided, and at least two cooling side openings 16 may be distributed around the center hole 14 at equal distances along the circumference of the drill body 1. This is beneficial to uniform cooling of the drill body 1, can increase the service life of the drill body 1, and improve the efficiency of iron opening.

[0053] In some embodiments, the crown 11 is provided with a plurality of chip grooves 13 corresponding to the plurality of blades 2, and the plurality of chip grooves 13 communicate with the sinking groove 15 and the peripheral wall of the crown 11. The chip grooves 13 can discharge impurities or iron chips discharged when the drill bit is working, and the overall preparation is relatively simple, which is conducive to controlling costs and improving the efficiency of opening the iron mouth.

[0054] In some embodiments, when the drill body 1 is provided with a center hole 14, a chip groove 13 and a sinking groove 15, the sinking groove 15 may be a columnar groove extending axially along the center hole 14, and the corresponding diameter of the sinking groove 15 is larger than the diameter of the center hole 14. A plurality of chip grooves 13 may be distributed circumferentially around the sinking groove 15, and the chip groove 13 may be a through groove, and the opening is provided at the crown 11, and the two ends of the chip groove 13 are respectively connected to the peripheral wall of the sinking groove 15 and the peripheral wall of the crown 11. With this arrangement, the gas flowing through the center hole 14 can have a larger contact surface with the sinking groove 15 and the chip groove 13, which is convenient for cooling the crown 11 and the drill as a whole, and is also convenient for blowing away the iron chips in the chip groove 13.

[0055] In some embodiments, the depth of the chip groove 13 is less than the depth of the sinking groove 15. Around the circumference of the central hole 14, the cooling side openings 16 can be staggered with the chip groove 13 to the peripheral wall of the sinking groove 15, and the aperture of the cooling side openings 16 is less than the depth of the sinking groove 15. While ensuring the overall strength of the drill bit, it is convenient for ventilation, purging and cooling of the drill bit.

[0056] It should be noted that the depth of the chip groove 13 is smaller than the depth of the sinking groove 15 , and the depth of the chip groove 13 is smaller than the depth of the sinking groove 15 along the axial direction of the center hole 14 .

[0057] Figure 3 FIG. 1 shows a schematic diagram of a structure of a tungsten iron opening machine in some embodiments or certain embodiments of the present application, with reference to FIG. Figure 3 In the present application, a machine for opening a wrought iron is provided, the machine for opening a wrought iron comprising:

[0058] The machine body 30 and the drill rod 10 rotatably connected to the machine body 30 have internal threads at one end.

[0059] As the drill bit mentioned above, the external thread of the drill bit is threadedly connected with the internal thread.

[0060] The drill bit and the drill rod 10 are threaded together, and the internal thread is located on the drill rod 10, which can reduce the pressure of the drill bit, extend the service life of the drill bit, and improve the efficiency of opening the iron hole.

[0061] It should be noted that Figure 3 The structure of the iron-making machine is simplified and is only used to illustrate the orientation.

[0062] In some embodiments, the drill bit body 1 is provided with a center hole 14 connecting the crown 11 and the connecting portion 12, and the drill rod 10 is provided with an air blowing hole 101 connecting the center hole 14. It is convenient for cooling gas to enter the drill bit body 1 through the drill rod 10, and the drill bit body 1 and the drill rod 10 are cooled. Both the drill bit and the drill rod 10 can be cooled, the overall service life is increased, and the replacement frequency of the drill bit and the drill rod 10 is reduced, so as to improve the efficiency of opening the iron mouth.

[0063] In some embodiments, the iron opening machine further includes an air blowing cooling device 20 for blowing air into the air blowing hole 101 to cool the drill rod 10 and the drill bit. The air blowing cooling device 20 can facilitate the cooling and purging of the drill bit and the drill rod 10, which is beneficial to improving the efficiency of the iron opening. The drill bit can be connected to the iron opening machine through the drill rod 10, and the air blowing cooling device 20 can be integrated with the iron opening machine, and cold air is passed from the air blowing hole 101 of the drill rod 10 in the iron opening machine for cooling. The air blowing cooling device 20 and the iron opening machine can also be spaced apart, and this application does not limit this.

[0064] In some embodiments, the air blowing cooling device 20 may be an air cooler or a cooling pipe provided with a structure for cooling gas or a heat exchanger, which is not limited in the present application.

[0065] In some embodiments, the maximum outer diameter of the drill bit as a whole can be 60mm. The sinking depth of the sinking groove 15 is 5mm, and the diameter of the sinking groove 15 is 20mm. The diameter of the center hole 14 is 8mm, and there are two cooling side openings 16 with an inner diameter of 8mm to facilitate ventilation cooling and dust blowing. The connection portion 12 is connected to the blade 2 by a chamfer 4, and the angle of the chamfer 4 can be R100 to increase the strength. The chip groove 13 is 8mm wide and 8mm deep; the drill bit has 4 blades 2, the blade 2 is 20mm thick, and the blade length is 15.5mm. The strength and overall quality of the drill bit obtained are good, and this application does not impose any restrictions on this.

[0066] The drill bit and the iron opening machine can be used to open the iron mouth of a large blast furnace with a size of 5500m3. The depth of the iron mouth is about 3.8-4.3 meters, and the thickness of the slag iron red layer in the blast furnace is about 0.5-0.8 meters. This application does not limit this.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0068] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0069] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A drill bit, characterized in that: The drill bit is used to cooperate with the drill rod thread, and the drill bit is integrally formed, and the drill bit includes: A columnar drill bit body, with two ends respectively configured as a crown and a connecting portion, wherein the connecting portion is provided with an external thread for cooperating with the drill rod; A plurality of cutting edges are circumferentially arranged on the crown portion around the crown portion, each of the cutting edges protrudes from the drill bit body in a radial direction of the drill bit body, and along the radial direction, a maximum distance between each of the cutting edges and an axis of the drill bit body is the same.

2. The drill bit according to claim 1, characterized in that The ratio of the axial length of the crown portion to the axial length of the connecting portion is 0.8:1 to 1.2:

1.

3. The drill bit according to claim 2, characterized in that The blade extends from the crown portion to the connecting portion, and the blade is chamfered and connected to the connecting portion.

4. The drill bit according to any one of claims 1 to 3, characterized in that: The side of the cutting edge away from the drill body is set as an arc-shaped side surface, and the arc-shaped side surfaces corresponding to the plurality of cutting edges can be fitted to obtain a cylindrical surface.

5. The drill bit according to any one of claims 1 to 3, characterized in that: The drill body is provided with a central hole connecting the crown and the connecting part, and a sinking groove surrounding the central hole, wherein the diameter of the sinking groove is larger than the diameter of the central hole and smaller than the diameter of the crown.

6. The drill bit according to claim 5, characterized in that The drill body is further provided with a cooling side opening, and the cooling side opening is connected with the sinking groove and the surface of the drill along the radial direction of the drill body.

7. The drill bit according to claim 5, characterized in that The crown is provided with a plurality of chip removal grooves corresponding to the plurality of blades one by one, and the chip removal grooves are connected to the sinking groove and the peripheral wall of the crown.

8. A iron opening machine, characterized in that: The iron machine includes: A machine body, a drill rod rotatably connected to the machine body, one end of which is provided with an internal thread; The drill bit according to any one of claims 1 to 7, wherein the external thread of the drill bit is threadably connected to the internal thread.

9. The iron opening machine according to claim 8, characterized in that: The drill bit body is provided with a central hole communicating with the crown portion and the connecting portion, and the drill rod is provided with an air blowing hole communicating with the central hole.

10. The iron opening machine according to claim 9, characterized in that: The iron machine also includes: The air blowing cooling device is used for blowing air into the air blowing hole to cool the drill rod and the drill bit.

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