Self-guiding adjustable sleeve drill tool for high-efficiency processing of macropores in carbon brick material

Abstract

The invention relates to the technical field of carbon brick cutting, in particular to a self-guiding adjustable sleeve drill tool for high-efficiency processing of large holes of a carbon brick material, and solves the problems that when large-diameter drilling is carried out on carbon bricks in the prior art, the carbon bricks are high in hardness, the cutting efficiency of the tool is low, the abrasion rate is high, and the drilling size is unstable due to the fact that the tool jumps easily during rotation. And meanwhile, waste chips generated by cutting are inconvenient to discharge in time. A self-guiding adjustable sleeve drill tool for efficiently machining large holes in carbon brick materials comprises a cutting tool body mechanism, tool mechanisms and a tool handle connecting mechanism, the five tool mechanisms are installed at the bottom end of the cutting tool body mechanism, and the tool handle connecting mechanism is installed at the upper end of the cutting tool body mechanism. The carbon bricks are machined in a trepanning drill mode, stability can be kept, high-speed rotation can be achieved, the drilling straightness is good, waste chips can be conveniently and synchronously discharged, cutter abrasion and local overheating are avoided, an available core rod can be generated, and discharging of the core rod is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of carbon brick cutting, in particular to a self-guided adjustable drill bit for high-efficiency processing of large holes in carbon brick materials. Background Art

[0002] Carbon bricks are a kind of carbon refractory material made of coke, anthracite or graphite and tar as raw materials, which are mixed, formed and burned to 1450℃ in a reducing flame. Carbon bricks are not only widely used in the metallurgical industry, but also in aluminum electrolytic cells. In addition, they are widely used to build the bottom and hearth of blast furnaces. In recent years, the scope of use has been continuously expanded, and carbon bricks have also begun to be used in the belly and the lower part of the furnace body. When cutting carbon bricks, machine tools are usually used for drilling.

[0003] When drilling large diameter holes in carbon bricks, the carbon bricks have high hardness, low cutting efficiency, fast wear rate, and the tool is prone to jumping when rotating, resulting in unstable drilling size. It is also inconvenient to discharge the waste chips generated by cutting in time. Therefore, it does not meet the existing needs. We have proposed a self-guided adjustable sleeve drilling tool for efficient large-hole processing of carbon brick materials. Summary of the invention

[0004] The purpose of the present invention is to provide a self-guided adjustable sleeve drill tool for efficient processing of large holes in carbon brick materials, so as to solve the problems raised in the above background technology that when drilling large diameter holes in carbon bricks, the carbon bricks have high hardness, the tool cutting efficiency is low, the wear rate is fast, and the tool rotation is prone to jumping, resulting in unstable drilling size, and it is not convenient to discharge the waste chips generated by cutting in time.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A self-guided adjustable drill bit for high-efficiency processing of large holes in carbon brick materials, comprising a cutting tool body mechanism, a tool mechanism and a tool handle connecting mechanism, wherein five tool mechanisms are installed at the bottom end of the cutting tool body mechanism, and a tool handle connecting mechanism is installed at the upper end of the cutting tool body mechanism, wherein the cutting tool body mechanism comprises an aluminum alloy tool body, wherein the outer surface of the aluminum alloy tool body is provided with a plurality of open spiral chip grooves, the inner side of the aluminum alloy tool body is provided with a core rod accommodating cavity, and the outer side of the bottom end of the aluminum alloy tool body is provided with five guide bar mounting grooves, and each guide bar mounting groove is provided with two tool holder mounting grooves on one side;

[0007] The tool mechanism includes a tungsten steel guide bar, which is arranged on the inner side of a guide bar mounting groove, a non-standard inner tool clamp is installed on one side of the tungsten steel guide bar, a non-standard outer tool clamp is provided on one side of the non-standard inner tool clamp, two positive and negative screws are installed on the inner side of the middle part of the tungsten steel guide bar, radial fine-tuning screws are installed on the inner side of the bottom end of the non-standard outer tool clamp and on both ends of the tungsten steel guide bar close to the aluminum alloy tool body, axial fine-tuning screws are installed on the upper ends of the non-standard outer tool clamp and the non-standard inner tool clamp, diamond blades are fixedly installed on the bottom ends of the non-standard outer tool clamp and the non-standard inner tool clamp, and the non-standard outer tool clamp and the non-standard inner tool clamp are fixedly connected to the aluminum alloy tool body by two tool clamp mounting screws.

[0008] Preferably, the shank connecting mechanism includes a BT50 shank, the BT50 shank is fixedly connected to the aluminum alloy blade body by four blade body fixing screws, a central blowing hole is provided on the inner side of the BT50 shank, a unloading spring is fixedly installed on the bottom end of the BT50 shank, positioning key blocks are installed on both sides of the middle part of the BT50 shank, and a key block locking screw is installed on the inner side of the positioning key block.

[0009] Preferably, the non-standard outer tool holder and the non-standard inner tool holder are both made of tool steel, and are integrally formed by CNC machine tools. The bottom ends of the non-standard outer tool holder and the non-standard inner tool holder are provided with a cutting edge, and the diamond blade is fixed on the cutting edge. The non-standard outer tool holder and the non-standard inner tool holder are fixed to the diamond blade by vacuum welding, and the installation direction of the diamond blade located at the bottom end of the non-standard outer tool holder is from the inside to the outside along the radial direction of the aluminum alloy tool body, and the installation direction of the diamond blade located at the bottom end of the non-standard inner tool holder is from the outside to the inside along the radial direction of the aluminum alloy tool body.

[0010] Preferably, the cutting diameter size of the diamond blade located at the bottom end of the non-standard outer tool clamp is D1, and the cutting diameter size of the diamond blade located at the bottom end of the non-standard inner tool clamp is D2. The upper end of the axial fine-tuning screw is threadedly connected to the aluminum alloy tool body, and one end of the tool clamp mounting screw passes through the aluminum alloy tool body and is threadedly connected to the non-standard outer tool clamp and the non-standard inner tool clamp. The upper ends of the non-standard outer tool clamp and the non-standard inner tool clamp are both in contact with the lower end surface of the axial fine-tuning screw.

[0011] Preferably, the five tool mechanisms are arranged in a circle relative to the axis of the aluminum alloy tool body, and the non-standard outer tool clamp, non-standard inner tool clamp and tungsten steel guide strip in each of the tool mechanisms are arranged clockwise relative to the axis of the aluminum alloy tool body, and the non-standard outer tool clamp and non-standard inner tool clamp are both arranged on the inner side of the tool clamp mounting groove, wherein five of the radial fine-tuning screws pass through the non-standard outer tool clamp and are threadedly connected to the aluminum alloy tool body, and another five of the radial fine-tuning screws are threadedly connected to the aluminum alloy tool body and are in close contact with the tungsten steel guide strip.

[0012] Preferably, the aluminum alloy blade body is integrally formed by a CNC machine tool, one end of the forward and reverse screws passes through the tungsten steel guide bar and is inserted into the inner side of the aluminum alloy blade body, both ends of the forward and reverse screws are provided with external threads with opposite rotation directions, and the forward and reverse screws are connected to the aluminum alloy blade body and the tungsten steel guide bar through threads.

[0013] Preferably, the cross-sectional parameters of the diamond blade include α, β, r1, r2, r3 and r4, the shape parameters of the tungsten steel guide bar include L1 and γ, and the shape parameters of the threaded end of the radial fine-tuning screw include L2, r5 and δ.

[0014] Preferably, the core rod accommodating cavity and the center blowing hole are through-connected, key slots are provided on the upper end of the aluminum alloy blade body and both sides of the middle of the BT50 shank, the positioning key block is arranged on the inner side of the key slot, and the positioning key block is fixedly connected to the BT50 shank by a key block locking screw.

[0015] Preferably, the inner wall of the center blowing hole is provided with three positioning grooves, the inner side of the positioning groove is slidably connected with a guide slide bar, the bottom ends of the three guide slide bars are fixedly installed with a connecting gasket, the lower end face of the connecting gasket is provided with a plurality of air holes, and the upper end of the guide slide bar is located at the lower end face of the BT50 tool handle and an anti-arc strip is installed.

[0016] Preferably, the bottom end of the unloading spring is fixedly connected to the connecting gasket, a U-shaped groove is provided on one side of the guide slide bar, the middle part of the anti-slip arc strip is inserted into the inner side of the U-shaped groove, the anti-slip arc strip is slidably connected to the guide slide bar, and the anti-slip arc strip is fixedly connected to the BT50 tool handle.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention connects the axial fine-tuning screw with the aluminum alloy cutter body through a threaded connection, so as to axially position and adjust the non-standard outer cutter clamp and the non-standard inner cutter clamp, thereby keeping the ends of the ten diamond blades flush, and fine-tunes the non-standard outer cutter clamp along the radial direction of the aluminum alloy cutter body through five radial fine-tuning screws, so as to adjust the cutting diameter size of the diamond blade on the non-standard outer cutter clamp, and adjusts the rotation diameter size of the five tungsten steel guide bars by rotating the other ten radial fine-tuning screws relative to the aluminum alloy cutter body. The aluminum alloy cutter body can cut carbon bricks and form ferrules through the diamond blades on the non-standard outer cutter clamp and the non-standard inner cutter clamp. By using a ferrule drill to process carbon bricks, it can maintain stable and high-speed rotation, and the straightness of the drilled hole is good;

[0019] 2. The present invention blows air to the central air hole through the machine tool spindle, so that there is an air pressure difference between the core rod accommodating cavity and the external environment, and the airflow generated by the air pressure difference can drive the cutting powder to be quickly discharged along the open spiral chip groove and realize the heat dissipation of the aluminum alloy tool body, thereby avoiding the diamond blade from secondary cutting of the retained powder and the wear of the diamond blade caused by the heat concentration caused by cutting, thereby extending the service life of the diamond blade. The connecting gasket pushes out the available core rod under the elastic support of the unloading spring, and cooperates with the airflow in the core rod accommodating cavity to achieve the effect of rapid unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a partial structural schematic diagram of the tool mechanism of the present invention;

[0022] Figure 3 It is a schematic diagram of the partial structure of the non-standard inner tool holder of the present invention;

[0023] Figure 4 It is a schematic diagram of the partial structure of the non-standard external tool holder of the present invention;

[0024] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the tungsten steel conductor bar of the present invention;

[0025] Figure 6 Schematic diagram of parameters of tungsten steel conductor bar of the present invention;

[0026] Figure 7 It is a schematic diagram of the thread end parameters of the radial fine-tuning screw of the present invention;

[0027] Figure 8 It is a schematic cross-sectional structure diagram of the present invention as a whole;

[0028] Fig. 9 It is a schematic diagram of the explosion structure of the present invention as a whole;

[0029] Fig.10 It is a schematic diagram of the installation structure of the connection gasket of the present invention;

[0030] Fig.11 It is a schematic cross-sectional structure diagram of the BT50 handle of the present invention;

[0031] Fig.12 It is a schematic diagram of the partial cross-sectional structure of the guide slide bar of the present invention.

[0032] In the figure: 1. Cutting tool body mechanism; 101. Aluminum alloy tool body; 102. Open spiral chip groove; 103. Core rod accommodating chamber; 104. Guide strip mounting groove; 105. Tool holder mounting groove; 2. Tool mechanism; 201. Non-standard external tool holder; 202. Non-standard internal tool holder; 203. Tungsten steel guide strip; 204. Tool holder mounting screw; 205. Axial fine-tuning screw; 206. Radial fine-tuning screw; 207. Front and back screws; 208. Diamond blade; 3. Tool holder connection mechanism; 301. BT50 tool holder; 302. Unloading spring; 303. Positioning key block; 304. Key block locking screw; 305. Center blowing hole; 306. Tool body fixing screw; 307. Connecting gasket; 308. Air vent; 309. Positioning slide groove; 310. Guide slide; 311. Anti-arc strip. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] See also Figure 1 and Figure 8 An embodiment of the present invention is as follows: a self-guided adjustable drill bit for high-efficiency large-hole processing of carbon brick materials, comprising a cutting tool body mechanism 1, a tool mechanism 2 and a tool holder connection mechanism 3, wherein the cutting tool body mechanism 1 comprises an aluminum alloy tool body 101, which is integrally formed by a CNC machine tool, wherein the outer surface of the aluminum alloy tool body 101 is provided with a plurality of open spiral chip grooves 102, the inner side of the aluminum alloy tool body 101 is provided with a core rod accommodating cavity 103, and the outer side of the bottom end of the aluminum alloy tool body 101 is provided with five guide bar mounting grooves 104, and each guide bar mounting groove 104 is provided with two tool holder mounting grooves 105 on one side, and the non-standard outer tool holder 201, the non-standard inner tool holder 202 and the tungsten steel guide bar 203 in the tool mechanism 2 can be installed through the guide bar mounting grooves 104 and the tool holder mounting grooves 105.

[0035] See also Figures 2 to 7Five tool mechanisms 2 are installed at the bottom end of the cutting tool body mechanism 1. The tool mechanism 2 includes a tungsten steel guide bar 203. The tungsten steel guide bar 203 is arranged on the inner side of the guide bar installation groove 104. A non-standard inner tool clamp 202 is installed on one side of the tungsten steel guide bar 203. A non-standard outer tool clamp 201 is installed on one side of the non-standard inner tool clamp 202. The non-standard outer tool clamp 201 and the non-standard inner tool clamp 202 are fixedly connected to the aluminum alloy tool body 101 through two tool clamp installation screws 204. The upper ends of the non-standard outer tool holder 201 and the non-standard inner tool holder 202 are both installed with axial fine-tuning screws 205. The materials of the non-standard outer tool holder 201 and the non-standard inner tool holder 202 are both tool steel. One end of the tool holder mounting screw 204 penetrates the aluminum alloy tool body 101 and is connected to the non-standard outer tool holder 201 and the non-standard inner tool holder 202 by threads. The non-standard outer tool holder 201 and the non-standard inner tool holder 202 are both integrally processed by CNC machine tools to ensure the universality of different batches.

[0036] The outer shape parameters of the tungsten steel guide bar 203 include L1 and γ. Two positive and negative screws 207 are installed on the inner side of the middle of the tungsten steel guide bar 203. One end of the positive and negative screw 207 passes through the tungsten steel guide bar 203 and is plugged into the inner side of the aluminum alloy tool body 101. Both ends of the positive and negative screw 207 are provided with external threads with opposite rotation directions. The positive and negative screw 207 is connected to the aluminum alloy tool body 101 and the tungsten steel guide bar 203 through threads. The tungsten steel guide bar 203 plays a supporting and guiding role, shortens the overhang length of the tool, improves rigidity, and can effectively suppress vibration during processing, thereby improving processing size and geometric accuracy;

[0037] The upper ends of the non-standard outer tool holder 201 and the non-standard inner tool holder 202 are both in contact with the lower end surface of the axial fine-tuning screw 205, and the upper end of the axial fine-tuning screw 205 is connected to the aluminum alloy tool body 101 through a thread. The inner side of the bottom end of the non-standard outer tool holder 201 and the two ends of the tungsten steel guide bar 203 close to the aluminum alloy tool body 101 are installed with radial fine-tuning screws 206. The threaded end shape parameters of the radial fine-tuning screw 206 include L2, r5 and δ. The five tool mechanisms 2 are arranged in a circle relative to the axis of the aluminum alloy tool body 101. The non-standard outer tool holder 201, the non-standard inner tool holder 202 and the tungsten steel guide bar 203 in each tool mechanism 2 are The non-standard outer tool holder 201 and the non-standard inner tool holder 202 are arranged in a clockwise manner relative to the axis of the aluminum alloy tool body 101, and are both arranged on the inner side of the tool holder mounting groove 105, wherein five radial fine-tuning screws 206 all penetrate the non-standard outer tool holder 201 and are connected to the aluminum alloy tool body 101 by threads, and the other five radial fine-tuning screws 206 are connected to the aluminum alloy tool body 101 by threads and are in close contact with the tungsten steel guide bar 203, and are rotated and fine-tuned by the axial fine-tuning screws 205 and the radial fine-tuning screws 206, so as to facilitate the adjustment of the tungsten steel guide bar 203 in the radial direction and the non-standard outer tool holder 201 and the non-standard inner tool holder 202 in the axial and radial directions;

[0038] The bottom ends of the non-standard outer tool holder 201 and the non-standard inner tool holder 202 are both fixedly mounted with a diamond blade 208. The bottom ends of the non-standard outer tool holder 201 and the non-standard inner tool holder 202 are provided with a cutting edge, and the diamond blade 208 is fixed on the cutting edge. The installation direction of the diamond blade 208 at the bottom end of the non-standard outer tool holder 201 is from inside to outside along the radial direction of the aluminum alloy blade body 101, and the installation direction of the diamond blade 208 at the bottom end of the non-standard inner tool holder 202 is from outside to inside along the radial direction of the aluminum alloy blade body 101. The cutting diameter size of the blade 208 is D1, the cutting diameter size of the diamond blade 208 located at the bottom of the non-standard inner tool holder 202 is D2, and the cross-sectional parameters of the diamond blade 208 include α, β, r1, r2, r3 and r4. The non-standard outer tool holder 201 and the non-standard inner tool holder 202 are fixed to the diamond blade 208 by vacuum welding, which can avoid the influence of the external environment during welding and uneven heating, which may cause bubbles to be generated during welding, damage the tool material, and cause defects such as loose welding, which may lead to the risk of reducing the service life of the tool.

[0039] See also Figure 8 and Fig. 9 The upper end of the cutting tool body mechanism 1 is equipped with a tool holder connecting mechanism 3, and the tool holder connecting mechanism 3 includes a BT50 tool holder 301, and the BT50 tool holder 301 is fixedly connected to the aluminum alloy tool body 101 by four tool body fixing screws 306. A central blowing hole 305 is provided on the inner side of the BT50 tool holder 301, and a discharge spring 302 is fixedly installed on the bottom end of the BT50 tool holder 301. Positioning key blocks 303 are installed on both sides of the middle part of the BT50 tool holder 301, and a key block locking screw 304 is installed on the inner side of the positioning key block 303. The core rod accommodating cavity 103 and the central blowing hole 305 are connected through, and the upper end of the aluminum alloy tool body 101 and Key slots are provided on both sides of the middle of the BT50 tool holder 301, and a positioning key block 303 is arranged on the inner side of the key slot. The positioning key block 303 and the BT50 tool holder 301 are fixedly connected by a key block locking screw 304. Air is blown to the center blowing hole 305 through the machine tool spindle, so that there is an air pressure difference between the inside of the core rod accommodating cavity 103 and the external environment, and the airflow generated by the air pressure difference can drive the cutting powder to be quickly discharged along the open spiral chip groove 102 and realize the heat dissipation of the aluminum alloy tool body 101, thereby avoiding the diamond blade 208 from performing secondary cutting on the retained powder and the heat concentration generated by the cutting, which leads to the wear of the diamond blade 208.

[0040] See also Figures 10 to 12The inner wall of the central blowing hole 305 is provided with three positioning grooves 309, and the inner side of the positioning groove 309 is slidably connected with a guide slide 310, and a connecting gasket 307 is fixedly installed at the bottom end of the three guide slides 310, and a plurality of air holes 308 are provided on the lower end surface of the connecting gasket 307. The upper end of the guide slide 310 is located at the lower end surface of the BT50 tool handle 301 and an anti-slip arc strip 311 is installed. The bottom end of the unloading spring 302 is fixedly connected with the connecting gasket 307. When the unloading spring 302 and the connecting gasket 307 are reset and rebounded, the three guide slides 310 are guided in the positioning groove 309 and the anti-slip arc strip 311 to avoid the unloading spring 302 being compressed and deflected, resulting in insufficient unloading;

[0041] A U-shaped groove is provided on one side of the guide slide 310, and the middle part of the anti-slip arc strip 311 is inserted into the inner side of the U-shaped groove. The anti-slip arc strip 311 is slidably connected to the guide slide 310, and the anti-slip arc strip 311 is fixedly connected to the BT50 tool handle 301. The anti-slip arc strip 311 can limit the guide slide 310 to prevent the guide slide 310 from being separated from the BT50 tool handle 301.

[0042] In summary, when drilling a carbon brick material, the aluminum alloy tool body 101 and the five tool mechanisms 2 are fixedly arranged in a circle, specifically, the non-standard outer tool clamp 201 and the non-standard inner tool clamp 202 are fixed to the inner side of the tool clamp mounting groove 105 by the tool clamp mounting screw 204, and the diamond blades 208 are fixed to the cutting edges of the non-standard outer tool clamp 201 and the non-standard inner tool clamp 202 by vacuum welding, and the installation directions of two adjacent diamond blades 208 are opposite, and the axial fine-tuning screw 205 is threadedly connected to the aluminum alloy tool body 101 to axially position and adjust the non-standard outer tool clamp 201 and the non-standard inner tool clamp 202, thereby keeping the ends of the ten diamond blades 208 flush;

[0043] The non-standard external tool holder 201 can be fine-tuned radially along the aluminum alloy tool body 101 by five radial fine-tuning screws 206, so that the cutting diameter size D1 of the diamond blade 208 on the non-standard external tool holder 201 can be adjusted. The tungsten steel guide bar 203 is fixed to the inner side of the guide bar mounting groove 104 by two positive and negative screws 207. At the same time, the other ten radial fine-tuning screws 206 are rotated relative to the aluminum alloy tool body 101 to adjust the rotation diameter size of the five tungsten steel guide bars 203.

[0044] The aluminum alloy cutter body 101 is fixed to the outer side of the bottom end of the BT50 cutter handle 301 by four cutter body fixing screws 306, and is positioned and prevented from deflection by two positioning key blocks 303. When the machine tool spindle drives the cutting cutter body mechanism 1 and the tool mechanism 2 to rotate synchronously through the BT50 cutter handle 301, the aluminum alloy cutter body 101 can cut the carbon brick and form a sleeve hole through the diamond blade 208 on the non-standard outer cutter clamp 201 and the non-standard inner cutter clamp 202;

[0045] The central air blowing hole 305 is blown by the machine tool spindle, and the central air blowing hole 305 is connected with the core rod accommodating chamber 103, so that there is an air pressure difference between the inside of the core rod accommodating chamber 103 and the external environment, and the airflow generated by the air pressure difference can drive the cutting powder to be quickly discharged along the open spiral chip groove 102 and realize the heat dissipation of the aluminum alloy cutter body 101, so as to avoid the diamond blade 208 from cutting the retained powder for the second time and the cutting heat concentration causing the wear of the diamond blade 208, thereby extending the service life of the diamond blade 208;

[0046] During the cutting process, the connecting gasket 307 is subjected to the core rod pressure in the core rod accommodating cavity 103 and drives the unloading spring 302 to be compressed. When the drilling is completed, the connecting gasket 307 pushes the core rod out under the elastic support of the unloading spring 302, and cooperates with the airflow in the core rod accommodating cavity 103 to achieve the effect of rapid unloading. When the unloading spring 302 and the connecting gasket 307 are reset and rebounded, the three guide slides 310 are guided in the positioning slide groove 309 and the anti-slip arc strip 311 to prevent the unloading spring 302 from being compressed and deflected, resulting in insufficient unloading. The anti-slip arc strip 311 can limit the guide slide 310 to prevent the guide slide 310 from being separated from the BT50 tool handle 301.

[0047] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A self-guided adjustable drill bit for high-efficiency large-hole processing of carbon brick materials, comprising a cutting tool body mechanism (1), a tool mechanism (2) and a tool handle connection mechanism (3), characterized in that: The bottom end of the cutting tool body mechanism (1) is equipped with five tool mechanisms (2), the upper end of the cutting tool body mechanism (1) is equipped with a tool handle connection mechanism (3), the cutting tool body mechanism (1) comprises an aluminum alloy tool body (101), the outer surface of the aluminum alloy tool body (101) is provided with a plurality of open spiral chip grooves (102), the inner side of the aluminum alloy tool body (101) is provided with a core rod accommodating cavity (103), the outer side of the bottom end of the aluminum alloy tool body (101) is provided with five guide bar mounting grooves (104), and one side of each guide bar mounting groove (104) is provided with two tool holder mounting grooves (105); the tool mechanism (2) comprises a tungsten steel guide bar (203), the tungsten steel guide bar (203) is arranged on the inner side of the guide bar mounting groove (104), and one side of the tungsten steel guide bar (203) is equipped with A non-standard inner tool holder (202) is provided with a non-standard outer tool holder (201) on one side of the non-standard inner tool holder (202); two positive and negative screws (207) are installed on the inner side of the middle part of the tungsten steel guide bar (203); radial fine-tuning screws (206) are installed on the inner side of the bottom end of the non-standard outer tool holder (201) and on both ends of the tungsten steel guide bar (203) close to the aluminum alloy tool body (101); axial fine-tuning screws (205) are installed on the upper ends of the non-standard outer tool holder (201) and the non-standard inner tool holder (202); diamond blades (208) are fixedly installed on the bottom ends of the non-standard outer tool holder (201) and the non-standard inner tool holder (202); and the non-standard outer tool holder (201) and the non-standard inner tool holder (202) are fixedly connected to the aluminum alloy tool body (101) through two tool holder mounting screws (204).

2. The self-guided adjustable drill bit for high-efficiency large-hole processing of carbon brick materials according to claim 1 is characterized in that: The shank connection mechanism (3) comprises a BT50 shank (301), wherein the BT50 shank (301) is fixedly connected to the aluminum alloy blade body (101) via four blade body fixing screws (306), a central blowing hole (305) is provided on the inner side of the BT50 shank (301), a discharge spring (302) is fixedly installed at the bottom end of the BT50 shank (301), positioning key blocks (303) are installed on both sides of the middle part of the BT50 shank (301), and a key block locking screw (304) is installed on the inner side of the positioning key block (303).

3. The self-guided adjustable drill bit for high-efficiency large-hole processing of carbon brick materials according to claim 1 is characterized in that: The non-standard outer tool holder (201) and the non-standard inner tool holder (202) are both made of tool steel. The non-standard outer tool holder (201) and the non-standard inner tool holder (202) are both integrally formed by a numerical control machine tool. The bottom ends of the non-standard outer tool holder (201) and the non-standard inner tool holder (202) are provided with a cutting edge. The diamond blade (208) is fixed on the cutting edge. The non-standard outer tool holder (201) and the non-standard inner tool holder (202) are both fixed to the diamond blade (208) by vacuum welding. The installation direction of the diamond blade (208) at the bottom end of the non-standard outer tool holder (201) is from inside to outside along the radial direction of the aluminum alloy blade body (101), and the installation direction of the diamond blade (208) at the bottom end of the non-standard inner tool holder (202) is from outside to inside along the radial direction of the aluminum alloy blade body (101).

4. The self-guided adjustable drill bit for high-efficiency large-hole processing of carbon brick materials according to claim 3 is characterized by: The cutting diameter size of the diamond blade (208) located at the bottom end of the non-standard outer tool holder (201) is D1, and the cutting diameter size of the diamond blade (208) located at the bottom end of the non-standard inner tool holder (202) is D2. The upper end of the axial fine-tuning screw (205) is connected to the aluminum alloy tool body (101) through a thread. One end of the tool holder mounting screw (204) passes through the aluminum alloy tool body (101) and is connected to the non-standard outer tool holder (201) and the non-standard inner tool holder (202) through a thread. The upper ends of the non-standard outer tool holder (201) and the non-standard inner tool holder (202) are both in contact with the lower end surface of the axial fine-tuning screw (205).

5. The self-guided adjustable drill bit for high-efficiency large-hole processing of carbon brick materials according to claim 4 is characterized in that: The five tool mechanisms (2) are arranged in a circle relative to the axis of the aluminum alloy tool body (101); the non-standard outer tool clamp (201), the non-standard inner tool clamp (202) and the tungsten steel guide bar (203) in each of the tool mechanisms (2) are arranged clockwise relative to the axis of the aluminum alloy tool body (101); the non-standard outer tool clamp (201) and the non-standard inner tool clamp (202) are both arranged on the inner side of the tool clamp mounting groove (105); five of the radial fine-tuning screws (206) penetrate the non-standard outer tool clamp (201) and are connected to the aluminum alloy tool body (101) by threads; the other five radial fine-tuning screws (206) are connected to the aluminum alloy tool body (101) by threads and are in close contact with the tungsten steel guide bar (203).

6. The self-guided adjustable drill bit for high-efficiency large-hole processing of carbon brick materials according to claim 5 is characterized in that: The aluminum alloy blade body (101) is integrally formed by CNC machine tools, one end of the positive and negative screws (207) passes through the tungsten steel guide bar (203) and is plugged into the inner side of the aluminum alloy blade body (101), both ends of the positive and negative screws (207) are provided with external threads with opposite rotation directions, and the positive and negative screws (207) are connected to the aluminum alloy blade body (101) and the tungsten steel guide bar (203) through threads.

7. The self-guided adjustable drill bit for high-efficiency large-hole processing of carbon brick materials according to claim 6 is characterized by: The cross-sectional parameters of the diamond blade (208) include α, β, r1, r2, r3 and r4, the shape parameters of the tungsten steel guide bar (203) include L1 and γ, and the shape parameters of the threaded end of the radial fine-tuning screw (206) include L2, r5 and δ.

8. The self-guided adjustable drill bit for high-efficiency large-hole processing of carbon brick materials according to claim 2 is characterized by: The core rod accommodating cavity (103) and the central blowing hole (305) are connected in a through manner, and key slots are provided on both sides of the upper end of the aluminum alloy blade body (101) and the middle part of the BT50 blade handle (301), and the positioning key block (303) is arranged on the inner side of the key slot, and the positioning key block (303) and the BT50 blade handle (301) are fixedly connected by a key block locking screw (304).

9. The self-guided adjustable drill bit for high-efficiency large-hole processing of carbon brick materials according to claim 8 is characterized in that: The inner wall of the central blowing hole (305) is provided with three positioning grooves (309), and the inner side of the positioning groove (309) is slidably connected with a guide slide bar (310), and a connecting gasket (307) is fixedly installed at the bottom end of the three guide slide bars (310), and a plurality of air holes (308) are provided on the lower end surface of the connecting gasket (307), and the upper end of the guide slide bar (310) is located at the lower end surface of the BT50 tool handle (301) and is installed with an anti-arc strip (311).

10. The self-guided adjustable drill bit for high-efficiency large-hole processing of carbon brick materials according to claim 9 is characterized in that: The bottom end of the unloading spring (302) is fixedly connected to the connecting gasket (307), a U-shaped groove is provided on one side of the guide slide bar (310), the middle part of the anti-slip arc strip (311) is inserted into the inner side of the U-shaped groove, the anti-slip arc strip (311) is slidably connected to the guide slide bar (310), and the anti-slip arc strip (311) is fixedly connected to the BT50 tool handle (301).

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