Brazing diamond drill bit and welding method thereof

Abstract

The invention discloses a brazing diamond drill bit, and relates to the technical field of diamond drill bits, the brazing diamond drill bit comprises a main base plate, a driving mechanism is fixedly mounted on one side of the top of the main base plate, and a linkage mechanism is movably assembled at the bottom of the main base plate; the power output end of the driving mechanism is connected with the linkage mechanism, the driving mechanism is used for providing driving force to drive the linkage mechanism to operate, and the linkage mechanism is used for transmitting power output by the driving mechanism in the vertical downward direction. The heat dissipation effect is improved by means of cooling liquid high-speed fluid, and water pressure formed by the high-speed fluid can prevent the heat dissipation guide holes from being blocked; and no additional kinetic energy part is needed for cooling liquid pumping, synchronous driving is directly achieved through power of the driving motor, the structure is simplified, energy consumption is reduced, cost is reduced, the problems that according to an existing scheme, cooling liquid is low in flow speed, poor in heat dissipation and high in cost due to the fact that additional kinetic energy is needed are solved, and stable operation of a drill bit is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of diamond drill bit technology, and in particular to a brazed diamond drill bit and its brazing method. Background Technology

[0002] With the advancement of industrialization and the increasing maturity of the machining industry, processing technologies are being optimized and upgraded. Supporting machining tools are innovating towards higher efficiency and durability. Among these advancements, composite brazing technology, a key technology for improving tool structural stability and performance, is widely used in the cutting tool manufacturing field, especially for core cutting tools like drill bits. Composite brazing technology can precisely weld materials with different properties (such as a high-strength matrix and a high-hardness cutting edge material), achieving complementary advantages in material properties and overcoming the limitations of single materials in terms of strength, hardness, and wear resistance. As a core machining tool, the performance of drill bits directly affects machining accuracy, efficiency, and cost control. Traditional drill bits... Because of the use of integral materials or simple welding processes, drill bits suffer from problems such as easy wear of the cutting edge, easy breakage of the base material, and poor heat dissipation, making it difficult to meet the requirements of high-strength, long-term, and complex machining. However, drill bits using composite brazing technology use wear-resistant materials such as cemented carbide for the cutting edge and high-toughness alloy structural steel for the base material. Through this process, they are firmly connected, which not only ensures the hardness and wear resistance of the cutting edge to cope with cutting difficult materials, but also uses the strong toughness of the base material to buffer the cutting impact and prevent drill bit breakage. At the same time, the high precision of this process can reduce the gap between the cutting edge and the base material, reduce heat accumulation at the connection point, lay the foundation for subsequent heat dissipation structure design, and further improve the service life and machining stability of the drill bit. However, the brazed joints of conventional drill bits on the market generally suffer from poor heat dissipation and insufficient assembly stability. This problem directly leads to the drill bit being prone to accelerated wear and edge chipping due to excessive temperature during high-speed cutting. This not only shortens the service life of the drill bit, but also affects the dimensional accuracy and surface quality of the drill hole, thus restricting the improvement of overall processing efficiency. To address the aforementioned heat dissipation challenges, targeted improvements have emerged in related technical fields. For example, Chinese Patent No. CN208961065U discloses a brazed tooth drill bit. This drill bit includes a drill bit body and a drill shank that are brazed together as a single unit. The cutting edge of the drill bit body is provided with multiple connecting holes. The purpose of this design is to achieve passive heat dissipation through the connecting holes, while also facilitating the direct flow of coolant to the cutting edge area through the connecting holes, thereby enhancing the heat dissipation effect and improving drilling efficiency. However, the aforementioned existing technical solutions still have obvious defects and shortcomings in practical applications. They are difficult to achieve rapid and efficient water cooling during drilling operations. First, their air cooling heat exchange efficiency is low. The drill bit only relies on the connecting holes on the cutting edge for passive air cooling, resulting in a slow heat transfer rate that cannot quickly remove the large amount of heat generated during drilling. Second, they lack coolant delivery functionality, relying solely on external water spraying towards the drill bit. Obviously, the water cooling cannot enter the drill bit through the connecting holes. The drill bit surface is cooled, but the inside of the drill bit still has a high temperature, which obviously cannot meet the requirements for efficient water cooling. In actual drilling operations, the connecting holes are easily blocked by materials and debris generated during drilling, making it difficult for coolant to enter the drill bit through the connecting holes. The overall heat dissipation effect is extremely limited. It is evident that the existing technology has certain defects and shortcomings, and therefore, it needs to be improved. Summary of the Invention

[0003] The purpose of this invention is to provide a brazed diamond drill bit and a welding method thereof to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a brazed diamond drill bit, comprising: A main base plate has a drive mechanism fixedly mounted on one side of its top, and a linkage mechanism movably mounted on the bottom of the main base plate; the power output end of the drive mechanism is connected to the linkage mechanism, the drive mechanism is used to provide driving force to drive the linkage mechanism to operate, and the linkage mechanism is used to transmit the power output by the drive mechanism in the vertical downward direction. A connecting rod is detachably mounted to the bottom output end of the linkage mechanism by bolts. The bottom of the connecting rod has a hexagonal slot in the vertical direction. The connecting rod is used to receive the power transmitted by the linkage mechanism and transmit the power to the downstream component, while bearing the load generated during operation. A pumping module is rotatably mounted inside the upper end of the connecting rod. The outer side of the pumping module extends outside the connecting rod and is connected to the linkage mechanism. The pumping module is used to pump coolant to achieve stable downward delivery of coolant and ensure cooling effect. The diamond drill bit body has its upper end fitted into the hexagonal slot. The bottom of the connecting rod is fastened to the diamond drill bit body by bolts. The cross-sectional shape of the hexagonal slot and the cross-sectional shape of the upper end of the diamond drill bit body are both regular hexagons, and the two fit each other to transmit the torque required for operation and restrict the relative rotation between the diamond drill bit body and the connecting rod. The diamond drill bit body includes a hexagonal mounting post, which is adapted to be inserted into the hexagonal slot and fixedly connected to the connecting rod by bolts. The cross-sectional shape of the hexagonal mounting post is a regular hexagon, which is adapted to the cross-sectional shape of the hexagonal slot, and is used to bear the torque generated during the operation of the drill bit. The drill bit main rod is integrally formed and set at the bottom of the hexagonal mounting post. The bottom of the drill bit main rod has integrally formed cutter wings distributed in a ring at equal intervals. Several diamond-impregnated blocks are brazed on the outer surface of the cutter wings at equal intervals. The cutter wings are the core drilling execution components of the drill bit and undertake the main drilling operation function. The guide grooves are arranged in a ring at equal intervals on the outer surface of the drill bit main rod. The guide grooves are all set in the gap between each cutter blade. The inner side of the guide grooves is provided with heat dissipation guide holes at equal intervals. The guide grooves are used to guide the waste chips of the drill bit operation. The cooling main cavity is located inside the drill bit main rod, hexagonal mounting post, and connecting rod, and is arranged to run through the axis of the three. The pumping module is rotatably mounted on the upper end of the cooling main cavity on the connecting rod. The bottom end of the cooling main cavity is connected to each of the heat dissipation guide holes, and its top is sealed and connected to the cooling water supply part of the drive mechanism. The cooling main cavity is used to receive coolant from the cooling water supply part and stably guide the coolant to each of the heat dissipation guide holes. Water cooling heat dissipation is achieved during the drill bit drilling process through the flow of coolant.

[0005] Preferably, the drive mechanism includes a mounting bracket, which is detachably mounted to the top side of the main base plate by bolts. A drive motor is mounted on the end of the mounting bracket away from the connecting rod by bolts. A first synchronous pulley is fixedly mounted on the output shaft end of the drive motor. The drive motor is used to provide the main power during operation. The second synchronous pulley is rotatably disposed at the top center of the main base plate. The bottom of the second synchronous pulley is connected to the input end of the linkage mechanism via a coupling. The second synchronous pulley is connected to the first synchronous pulley via a synchronous belt. The second synchronous pulley is used to transmit the kinetic energy of the drive motor obtained through the synchronous belt to the linkage mechanism.

[0006] Preferably, the support arm is integrally formed and set at one end of the main base frame. The upper end of the support arm is bolted to a connecting support plate. The connecting support plate is connected to one side of the drive motor by bolts. The support arm and the connecting support plate are used to support and reinforce the drive motor.

[0007] Preferably, the hanger is welded and fixed to the top of the main base plate. A lifting mounting plate is fixedly installed on the top of the hanger. Mounting holes are provided at the four corners of the lifting mounting plate. The mounting holes are countersunk holes. The hanger, the lifting mounting plate and each of the mounting holes cooperate to assemble the whole device onto the telescopic cylinder of the drilling equipment.

[0008] Preferably, a rotary joint is rotatably connected to the top of the main substrate on the side away from the drive motor. A coolant delivery pipe is rotatably connected to the top of the rotary joint. The bottom of the rotary joint is fixedly installed inside the linkage mechanism through the main substrate. The connecting rod is installed at the bottom output end of the rotary joint by bolts. The cooling main cavity and the rotary joint are connected. The coolant delivery pipe is used to deliver coolant through the rotary joint into the cooling main cavity and finally into the heat dissipation guide hole for heat dissipation. A connecting flange is welded to the inlet end of the coolant delivery pipe. A sealing gasket is provided on the outer inlet end of the connecting flange. The connecting flange is used to connect with an external coolant attack pipe.

[0009] Preferably, the linkage mechanism includes a drive gear, which is rotatably connected to the bottom of the main base plate near the drive motor. The top of the drive gear is fixedly connected to the bottom of the second synchronous pulley through a coupling. The drive gear is used to receive and transmit the power output by the drive motor. The driven gear ring is fixedly connected to the outer surface of the rotary joint located at the bottom of the main base plate. The driven gear ring meshes with the driving gear. The driven gear ring is used to receive the power transmitted by the driving gear and transmit the power to the drill bit main rod to drive the diamond drill bit body to rotate. The linkage module is fixedly installed on the bottom outer side of the main base plate. The linkage component is used to transmit the power of the driven gear ring to the pumping module, so as to achieve the effect of the pumping module rapidly rotating and pumping coolant while the diamond drill bit body rotates.

[0010] Preferably, the linkage module includes a concave frame, which is fixedly installed on the bottom outer side of the main base plate. A fixing ring is fixedly installed in the middle of the bottom of the concave frame. A beveled ring is welded inside the fixing ring. The connecting rod rotates inside the beveled ring. The outer side of the pumping module is engaged with the beveled ring. The beveled ring is used to transmit the power during the rotation of the connecting rod to the pumping module so as to realize the pumping module pumping coolant.

[0011] Preferably, the pumping module includes a cross, which is fixedly installed on the upper end of the cooling main cavity on the connecting rod. The top of the cross is rotatably connected to a rotating shaft, and a propeller is fixedly installed on the outer surface of the rotating shaft. A linkage component is located at the upper end of the rotating shaft. A connecting rod is installed through one side of the linkage component and it is engaged with the bevel gear ring. The linkage component is used to form a linkage with the bevel gear ring, receive and transmit kinetic energy to the rotating shaft. The rotating shaft is used to receive the kinetic energy transmitted by the linkage component and drive the propeller to rotate, so as to pump the coolant downward. The coolant is discharged through the heat dissipation guide hole to realize heat dissipation and cooling during the drilling process.

[0012] Preferably, the linkage assembly includes a built-in shaft, which is rotatably connected to the upper end of the cooling main cavity on the connecting rod. An inner active bevel gear is fixedly installed in the middle of the built-in shaft, and an outer active bevel gear is fixedly installed at one end of the built-in shaft through the connecting rod via a sealed coupling. The outer active bevel gear is meshed with a bevel gear ring. An inner driven bevel gear is fixedly connected to the top of the rotating shaft. The inner driven bevel gear and the inner driving bevel gear are connected by a transmission. When the connecting rod is rotating, it drives the outer driving bevel gear to rotate with the axis of the connecting rod. The driving bevel gear obtains kinetic energy from the stationary bevel gear ring and transmits it to the inner driving bevel gear through the built-in shaft. The inner driving bevel gear drives the rotating shaft to drive the propeller to rotate through the inner driven bevel gear, so as to realize the pumping of coolant towards the heat dissipation guide hole.

[0013] A brazing method for diamond drill bits includes the following steps: Step 1: Use metal cutting equipment to cut the steel to make drill bit main rod blank and cutter blade blank. Then, use CNC milling machine to mill the outer side of the cutter blade blank, leaving the area for diamond impregnated block welding. After processing, use ultrasonic cleaning equipment to clean the surface of drill bit main rod blank and cutter blade blank to remove surface oil and impurities. Step 2: Fix the cleaned blade blank on the tooling fixture, calibrate the position of the blade blank using a vision positioning device, and then place the diamond impregnated blocks one by one in the welding area of ​​the blade blank according to the preset spacing. Use the positioning pins on the tooling fixture to adjust the position of the diamond impregnated blocks so that each diamond impregnated block is evenly distributed in the welding area. Step 3: Use an automatic dispensing device to fill the contact gap between the diamond impregnated block and the blade blank with brazing filler metal. During the filling process, use a CCD vision inspection device to monitor the amount of brazing filler metal in real time to ensure that the brazing filler metal completely covers the contact area. Step 4: Using hoisting equipment, place the diamond-impregnated blade blank and the drill bit main rod blank into the vacuum brazing furnace. After closing the furnace door, set the brazing temperature and holding time through the furnace control system, start the vacuum system to remove air from the furnace, and start the heating system to perform brazing operation after the vacuum level in the furnace reaches the preset value. Step 5: After the brazing operation is completed, turn off the heating system and maintain the vacuum state inside the furnace. When the temperature inside the furnace cools down to below the preset temperature, turn on the furnace door inert gas replacement system and fill the furnace with nitrogen until the temperature inside the furnace cools down to room temperature. Then, use hoisting equipment to remove the welded assembly of the drill bit main rod and the cutter blade. Step 6: Place the removed welding components on a grinding wheel to grind away any residual brazing filler metal at the weld. Then, place the welding components in an acid pickling tank and use a mixed solution for acid pickling to remove oxide scale from the weld and workpiece surface. After acid pickling, rinse the welding components in a clean water tank and finally dry them using a hot air drying device to complete the welding process of the diamond drill bit body.

[0014] The technical effects and advantages of this invention are as follows: 1. During the application of this technical solution, by setting up a cooling main cavity, a pumping module, and related structures for heat dissipation, the high-speed fluid inside the coolant can be used to improve the heat dissipation effect during use. The pumping module obtains power by rotating the connecting rod, which drives the propeller to quickly deliver the coolant downwards. The coolant, in a high-speed fluid state, fully contacts the drill bit main rod and blades through the heat dissipation guide holes, efficiently absorbs the drilling heat, and is discharged through the guide groove. At the same time, the high-speed flowing coolant can also form a certain water pressure, preventing the heat dissipation guide holes from being blocked by impurities. This achieves a continuous, stable, and efficient water cooling effect, solving the problems of slow coolant flow rate, low heat dissipation efficiency, and heat dissipation failure caused by the connection holes being easily blocked by debris in the existing solution. This ensures that the drill bit temperature remains stable during drilling operations and avoids accelerated wear and edge breakage due to high temperature. 2. During the application of this technical solution, the optimized design of power transmission and coolant pumping eliminates the need for additional kinetic energy components for coolant pumping. The pumping module is directly driven by the power of the drive motor that rotates the drill bit, simplifying the overall structure and reducing additional energy consumption, thereby lowering operating costs. Simultaneously, during power transmission, the drive motor stably transmits power to the drill bit via a synchronous belt and gear meshing, ensuring efficient drilling while simultaneously achieving high-speed coolant delivery and heat dissipation. Furthermore, the water-pressure driven design of the internal pumping module prevents the heat dissipation vents from becoming blocked, and even when the vents are blocked, coolant can still flow smoothly, maintaining stable and efficient heat dissipation. This solves the problems of high cost, complex structure, and poor synergy between power and heat dissipation caused by the need for additional drive components in existing devices, ensuring efficient and continuous operation while further improving the device's economy and practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a bottom-view structural diagram of the present invention.

[0017] Figure 3 This is a schematic diagram of the rear view structure of the present invention.

[0018] Figure 4 This is a side view of the structure of the present invention.

[0019] Figure 5 This is a top view of the drive motor of the present invention in the removed state.

[0020] Figure 6 This is a schematic diagram of the drive mechanism and linkage mechanism of the present invention.

[0021] Figure 7 This is a top view of the pumping module and connecting rod of the present invention.

[0022] Figure 8 This is a schematic diagram of the internal pumping module structure of the connecting rod of the present invention.

[0023] Figure 9 For the present invention Figure 3 A magnified structural diagram at point A; Figure 10 For the present invention Figure 8 A magnified structural diagram at point B.

[0024] In the diagram: 1. Main base plate; 2. Drive mechanism; 21. Mounting bracket; 22. Drive motor; 23. First synchronous pulley; 24. Second synchronous pulley; 25. Support arm; 26. Connecting support plate; 27. Hanger; 28. Hanging mounting plate; 29. ​​Rotary joint; 210. Mounting hole; 211. Coolant delivery pipe; 212. Connecting flange; 3. Linkage mechanism; 31. Drive gear; 32. Driven gear ring; 33. Linkage module; 331. Concave frame; 332. Fixing ring; 3 33. Bevel gear ring; 4. Connecting rod; 5. Hexagonal slot; 6. Pumping module; 61. Cross; 62. Rotating shaft; 63. Linkage assembly; 631. Internal shaft; 632. Internal driving bevel gear; 633. External driving bevel gear; 634. Internal driven bevel gear; 64. Spiral drive propeller; 7. Diamond drill bit body; 71. Hexagonal mounting post; 72. Drill bit main shaft; 73. Cutting blade; 74. Guide groove; 75. Heat dissipation guide hole; 76. Cooling main cavity; 77. Diamond impregnated block. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figures 1 to 9 As shown, the brazed diamond drill bit provided by the present invention, during application, achieves multiple core advantages by setting up a cooling main cavity 76, a pumping module 6, and related structures for heat dissipation guides, combined with an optimized power transmission and coolant pumping collaborative design. On the one hand, the pumping module 6 obtains power by rotating the connecting rod, driving the propeller 64 to quickly deliver coolant downwards, so that the coolant, in a high-speed fluid state, fully contacts the drill bit main shaft 72 and the blade 73 through the heat dissipation guide holes 75, efficiently absorbing drilling heat and then being discharged through the guide groove 74. At the same time, the water pressure formed by the high-speed fluid can prevent the heat dissipation guide holes 75 from being blocked by impurities, achieving a continuous, stable, and efficient water cooling effect. This solves the problems of existing solutions that rely solely on gravity to drive the coolant flow rate, resulting in low heat dissipation efficiency and easy obstruction of the connecting holes by debris. To address the issue of heat dissipation failure, this device ensures stable drill bit temperature during drilling operations, preventing accelerated wear and edge chipping caused by high temperatures. Furthermore, it eliminates the need for additional kinetic energy components for coolant pumping, directly utilizing the power of the drive motor 22 to rotate the drill bit and synchronously drive the pumping module 6. This simplifies the overall structure, reduces additional energy consumption, and lowers operating costs. The drive motor 22 stably transmits power to the drill bit via a synchronous belt and gear meshing, ensuring efficient drilling while simultaneously achieving high-speed coolant delivery and heat dissipation. Even if the heat dissipation vents 75 are blocked, the coolant can still flow smoothly inside, maintaining the heat dissipation effect. This solves the problems of high cost, complex structure, and poor synergy between power and heat dissipation associated with existing devices requiring additional drive components, ensuring efficient and continuous operation and improving the device's economy and practicality.

[0027] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment. In this embodiment, no special limitations are imposed.

[0028] In this embodiment, a brazed diamond drill bit includes: The main base plate 1 has a drive mechanism 2 fixedly installed on one side of its top, and a linkage mechanism 3 movably assembled on the bottom of the main base plate 1; the power output end of the drive mechanism 2 is connected to the linkage mechanism 3, the drive mechanism 2 is used to provide driving force to drive the linkage mechanism 3 to operate, and the linkage mechanism 3 is used to transmit the power output by the drive mechanism 2 in the vertical downward direction. A connecting rod is detachably mounted to the bottom output end of the linkage mechanism 3 by bolts. The bottom of the connecting rod has a hexagonal slot 4 in the vertical direction. The connecting rod 5 is used to receive the power transmitted by the linkage mechanism 3 and transmit the power to the downstream component, while bearing the load generated during operation. The pumping module 6 is rotatably mounted on the upper part of the connecting rod. The outer side of the pumping module 6 extends out of the connecting rod and is connected to the linkage mechanism 3. The pumping module 6 is used to pump coolant to achieve stable downward delivery of coolant and ensure cooling effect. The diamond drill bit body 7 has its upper end fitted into a hexagonal slot 4 and a connecting rod 5. The bottom of the connecting rod is fastened to the diamond drill bit body 7 by bolts. The cross-sectional shape of the hexagonal slot 4 and the connecting rod 5 is the same as the cross-sectional shape of the upper end of the diamond drill bit body 7, and the two fit together to transmit the torque required for operation and limit the relative rotation between the diamond drill bit body 7 and the connecting rod. The diamond drill bit body 7 includes a hexagonal mounting post 71, which is adapted to be inserted into the hexagonal slot 4 and the connecting rod 5, and is fixedly connected to the connecting rod by bolts. The cross-sectional shape of the hexagonal mounting post 71 is a regular hexagon, which is adapted to the cross-sectional shape of the hexagonal slot 4 and the connecting rod 5, and is used to bear the torque generated during the operation of the drill bit. The drill bit main rod 72 is integrally formed and set at the bottom end of the hexagonal mounting post 71. The bottom of the drill bit main rod 72 has integrally formed cutter wings 73 distributed in a ring at equal intervals. Several diamond impregnated blocks 77 are brazed on the outer surface of the cutter wings 73 at equal intervals. The cutter wings 73 are the core drilling execution components of the drill bit and undertake the main drilling operation function. The guide grooves 74 are arranged in a ring at equal intervals on the outer surface of the drill bit main rod 72. The guide grooves 74 are all set in the gap between each cutter wing 73. The inner side of the guide grooves 74 is provided with heat dissipation guide holes 75 at equal intervals. The guide grooves 74 are used to guide the waste chips of the drill bit operation. The cooling main cavity 76 is located inside the drill bit main rod 72, the hexagonal mounting post 71, and the connecting rod, and is arranged to run through the axis of the three. The pumping module 6 is rotatably mounted on the upper end of the cooling main cavity 76 on the connecting rod. The bottom end of the cooling main cavity 76 is connected to each heat dissipation guide hole 75, and its top is sealed and connected to the cooling water supply part of the drive mechanism 2. The cooling main cavity 76 is used to receive coolant from the cooling water supply part and stably guide the coolant to each heat dissipation guide hole 75. Water cooling heat dissipation is achieved during the drill bit drilling process through the flow of coolant.

[0029] The drive mechanism 2 includes a mounting bracket 21, which is detachably mounted on one side of the top of the main base plate 1 by bolts. A drive motor 22 is mounted on the end of the mounting bracket 21 away from the connecting rod by bolts. A first synchronous pulley 23 is fixedly mounted on the output shaft end of the drive motor 22. The drive motor 22 is used to provide the main power during operation. The second synchronous pulley 24 is rotatably disposed at the top center of the main base plate 1. The bottom of the second synchronous pulley 24 is connected to the input end of the linkage mechanism 3 through a coupling. The second synchronous pulley 24 is connected to the first synchronous pulley 23 through a synchronous belt. The second synchronous pulley 24 is used to transmit the kinetic energy of the drive motor 22 obtained through the synchronous belt to the linkage mechanism 3.

[0030] The support arm 25 is integrally formed and set at one end of the main base frame. The upper end of the support arm 25 is bolted to the connecting support plate 26. The connecting support plate 26 is connected to one side of the drive motor 22 by bolts. The support arm 25 and the connecting support plate 26 are used to support and reinforce the drive motor 22.

[0031] The hanger 27 is welded and fixed to the top of the main base plate 1. The top of the hanger 27 is fixedly installed with a lifting mounting plate 28. The four corners of the lifting mounting plate 28 are provided with mounting holes 210, which are countersunk holes. The hanger 27, the lifting mounting plate 28 and each mounting hole 210 cooperate to assemble the whole device onto the telescopic cylinder of the drilling operation equipment.

[0032] Rotary joint 29 is rotatably connected to the top of the main base plate 1 on the side away from the drive motor 22. Coolant delivery pipe 211 is rotatably connected to the top of rotary joint 29. The bottom of rotary joint 29 penetrates the main base plate 1 and is fixedly installed inside the linkage mechanism 3. The connecting rod is installed at the bottom output end of rotary joint 29 by bolts. Cooling main cavity 76 and rotary joint 29 are connected. Coolant delivery pipe 211 is used to deliver coolant through rotary joint 29 into cooling main cavity 76 and finally into heat dissipation guide hole 75 for heat dissipation. A connecting flange 212 is welded to the inlet end of the coolant delivery pipe 211. A sealing gasket is provided on the outer inlet end of the connecting flange 212. The connecting flange 212 is used to connect with an external coolant attack pipe.

[0033] The linkage mechanism 3 includes a drive gear 31, which is rotatably connected to the bottom of the main base plate 1 near the drive motor 22. The top of the drive gear 31 is fixedly connected to the bottom of the second synchronous wheel 24 through a coupling. The drive gear 31 is used to receive and transmit the power output by the drive motor 22. Driven gear ring 32 is fixedly connected to the outer surface of the rotary joint 29 located at the bottom of the main base plate 1. Driven gear ring 32 is meshed with drive gear 31. Driven gear ring 32 is used to receive the power transmitted by drive gear 31 and transmit the power to drill bit main rod 72 to drive diamond drill bit body 7 to rotate. Linkage module 33 is fixedly installed on the bottom outer side of the main base plate 1. Linkage component 63 is used to transmit the power of driven gear ring 32 to pumping module 6, so as to achieve the effect of pumping module 6 rapidly rotating and pumping coolant while diamond drill bit body 7 is rotating.

[0034] The linkage module 33 includes a concave frame 331, which is fixedly installed on the bottom outer side of the main base plate 1. A fixing ring 332 is fixedly installed in the middle of the bottom of the concave frame. A beveled ring 333 is welded inside the fixing ring 332. The connecting rod rotates inside the beveled ring 333. The outer side of the pumping module 6 is engaged with the beveled ring 333. The beveled ring 333 is used to transmit the power during the rotation of the connecting rod to the pumping module 6 so as to realize the pumping module 6 pumping coolant.

[0035] The pumping module 6 includes a cross 61, which is fixedly installed on the upper end of the cooling main cavity 76 on the connecting rod. The top of the cross 61 is rotatably connected to a rotating shaft 62, and a propeller 64 is fixedly installed on the outer surface of the rotating shaft 62. Linkage component 63 is located at the upper end of rotating shaft 62. A connecting rod passes through one side of linkage component 63 and meshes with bevel gear ring 333. Linkage component 63 is used to form a linkage with bevel gear ring 333, receive and transmit kinetic energy to rotating shaft 62. Rotating shaft 62 is used to receive the kinetic energy transmitted by linkage component 63, drive propeller 64 to rotate, pump coolant downwards, and discharge coolant through heat dissipation guide hole 75 to achieve heat dissipation and cooling during drilling.

[0036] The linkage assembly 63 includes an internal shaft 631, which is rotatably connected to the upper end of the cooling main cavity 76 on the connecting rod. An internal drive bevel gear 632 is fixedly installed in the middle of the internal shaft 631. An external drive bevel gear 633 is fixedly installed at one end of the internal shaft 631 through the connecting rod via a sealed coupling. The external drive bevel gear 633 and the bevel gear ring 333 are meshed and connected. The inner driven bevel gear 634 is fixedly connected to the top of the rotating shaft 62. The inner driven bevel gear 634 and the inner driving bevel gear 632 are connected in a transmission manner. When the connecting rod is rotating, it drives the outer driving bevel gear 633 to rotate with the axis of the connecting rod. The driving bevel gear obtains kinetic energy from the stationary bevel ring 333 and transmits it to the inner driving bevel gear 632 through the inner shaft 631. The inner driving bevel gear 632 drives the rotating shaft 62 to drive the propeller 64 to rotate through the inner driven bevel gear 634, so as to realize the pumping of coolant towards the heat dissipation guide hole 75.

[0037] When using a brazed diamond drill bit of this embodiment, the device is first assembled. By setting the lifting mounting plate 28 on the top of the hanger 27 and cooperating with the countersunk holes at the four corners of the lifting mounting plate 28, the entire device is assembled onto the telescopic cylinder of the drilling equipment. The countersunk hole design can prevent the head of the bolt from protruding after installation, preventing interference with other components and keeping the assembled structure compact. Then, the external coolant supply pipe is connected to the coolant delivery pipe 211 through the connecting flange 212. The sealing gasket at the input end of the connecting flange 212 can effectively prevent coolant leakage during delivery, reducing resource waste and environmental impact. At the same time, the support arm 25 and the connecting support plate 26 of this device cooperate with each other to support and reinforce the drive motor 22, preventing the drive motor 22 from shifting due to vibration during subsequent operations. After assembly, the device is started. The drive motor 22 in the drive mechanism 2 starts running, providing the main power required for the operation. The first synchronous pulley 23 at the output shaft end of the drive motor 22 rotates synchronously with the output shaft. The first synchronous pulley 23 drives the second synchronous pulley 24 to rotate through the synchronous belt. The second synchronous pulley 24 transmits kinetic energy to the drive gear 31 of the linkage mechanism 3 through the coupling. The drive gear 31 meshes with the driven gear ring 32, thereby driving the rotary joint 29 to rotate. Since the bottom of the rotary joint 29 is connected to the connecting rod by bolts, and the hexagonal groove 4 at the bottom of the connecting rod; the connecting rod; 5 is adapted to the hexagonal mounting post 71 of the diamond drill bit body 7. The hexagonal slot 4 and connecting rod 5 are inserted and fixed with bolts. The regular hexagonal cross-section of the hexagonal mounting post 71 can effectively transmit the working torque and restrict the relative rotation of the two. Therefore, the rotary joint 29 will drive the connecting rod and the diamond drill bit body 7 to rotate together. The cutting blade 73 of the diamond drill bit body 7 will then start drilling. The diamond impregnated block 77 brazed on the outside of the cutting blade 73 can improve the drilling ability and ensure that the drilling operation is carried out efficiently. The hexagonal slot 4 and connecting rod 5 are adapted to have a sealing ring inside. Even if the sealing ring is not set, a small amount of coolant can flow along the connecting rod to the diamond impregnated block 77 for cooling, which does not affect the cooling effect. While the diamond drill bit body 7 is rotating, the external coolant supply pipe delivers coolant to the coolant delivery pipe 211 via the connecting flange 212. The coolant then enters the cooling main cavity 76 through the rotary joint 29. At this time, the linkage module 33 of the linkage mechanism 3 starts to work. The concave frame 331 of the linkage module 33 is fixed to the outer side of the bottom of the main base plate 1, and the conical ring 333 inside the bottom fixing ring 332 of the concave frame 331 remains stationary. When the connecting rod rotates, it drives the linkage component 63 of the pumping module 6 to move. The moving bevel gear 633 meshes with the bevel ring 333. The outer driving bevel gear 633 moves along the bevel ring 333 and obtains kinetic energy. It drives the inner shaft 631 to rotate through the sealed coupling. The inner driving bevel gear 632 in the middle of the inner shaft 631 rotates synchronously and is connected to the inner driven bevel gear 634 for transmission, thereby driving the rotating shaft 62 to rotate. The spiral drive paddle 64 on the outer surface of the rotating shaft 62 rotates with the rotating shaft 62, pumping the coolant in the cooling main cavity 76 downward, causing the coolant to flow quickly to the bottom of the cooling main cavity 76 and enter the heat dissipation guide hole 75 connected thereto. After the coolant is discharged through the heat dissipation guide hole 75, it comes into full contact with the drill bit main shaft 72 and cutter wings 73 that are currently drilling, absorbing the heat generated during drilling and achieving efficient water cooling. Subsequently, the coolant carries some heat to the outer surface of the drill bit main shaft 72. The guide grooves 74 arranged in an evenly spaced ring on the outer surface of the drill bit main shaft 72 are located at the gaps between the cutter wings 73. The waste chips generated during drilling are discharged in time through the guide grooves 74, avoiding the accumulation of waste chips that affects drilling efficiency. It also prevents waste chips from clogging the heat dissipation guide hole 75, which would reduce the heat dissipation effect. In addition, the coolant flows out quickly from the inside through the heat dissipation guide hole 75, which can achieve efficient heat exchange. At the same time, the water pressure inside can prevent the heat dissipation guide hole from being blocked. 75 is covered with dust and impurities; it can be seen that this technical solution uses a synchronous belt and gear meshing transmission method to make the transmission components tightly connected and reduce power loss. The integral structure of the cutter blade 73 and the drill bit main shaft 72 reduces the connection gap. Combined with the brazing process to fix the diamond impregnated block 77, compared with the traditional simple welding process of drill bits, the wear resistance and structural stability of the cutter blade 73 are greatly improved, and the problems of easy wear of the cutting edge and easy breakage of the base body of traditional drill bits are solved. This device does not require an additional drive component for the pumping module 6. It directly uses the rotation of the connecting rod to obtain power, realizing the synchronous operation of the diamond drill bit body 7 rotation and coolant pumping, ensuring the cooling during the drilling operation. A continuous coolant supply prevents heat dissipation failure due to coolant interruption. Simultaneously, the propeller 64 provides additional kinetic energy to the coolant, solving the problem of existing solutions relying solely on gravity for coolant delivery and discharge, ensuring rapid contact between the coolant and the drill bit's heat-generating components, thus improving water-cooling efficiency. The cooperation between the heat dissipation guide hole 75 and the guide groove 74 not only solves the problem of low air-cooling heat exchange efficiency in existing solutions but also avoids the situation in existing improved solutions where the connecting holes are easily blocked by debris, leading to heat dissipation failure, further ensuring efficient and continuous operation. The rotary joint 29 allows the coolant delivery pipe 211 to be fixed while the connecting rod rotates. To prevent damage to the coolant delivery pipe 211 due to rotation and entanglement, and to ensure the stability of the coolant delivery channel; the cooperation between the hanger 27 and the lifting mounting plate 28 allows this device to be adapted to be installed on the telescopic cylinder of different drilling equipment, meeting the needs of different operating scenarios and improving the overall adaptability and practicality of the device; the cooperation between the support arm 25 and the connecting support plate 26 provides support and reinforcement for the drive motor 22, preventing vibration of the drive motor 22 during operation from affecting the stability of power transmission and indirectly ensuring drilling accuracy; the sealing gasket on the outside of the connecting flange 212 prevents coolant leakage and reduces resource waste; the countersunk hole design prevents the bolt head from protruding and interfering with other components, ensuring compact assembly.

[0038] It should be noted that during the application of this device, the outer surfaces of its driving gear 31 and driven gear can be covered with dustproof protective shells to assist in the protection of the transmission components. Simultaneously, a corresponding dustproof shell can also be installed on the outer side of its bevel gear ring 333 for dust protection. In this technical solution, the driving gear 31, driven gear ring 32, and bevel gear ring 333 of the linkage mechanism 3 are all made of 20CrMnTi carburized steel. This material has the characteristics of corrosion resistance, high strength, and strong weather resistance, and can be used for a long time in air or water. The driving gear 31 is fixedly connected to the bottom of the second synchronous pulley 24 via a coupling. The driven gear ring 32 is welded and fixed to the outer surface of the rotary joint 29 and meshes with the driving gear 31. The bevel gear ring 333 is welded to the fixed ring 33. 2. The internal gear meshes with the external active bevel gear 633. All gears are coated with polytetrafluoroethylene lubricating oil during assembly. This lubricating oil has good weather resistance and can maintain its lubricating effect in water and air for a long time, ensuring smooth gear transmission. The drive motor 22 of the drive mechanism 2 is a YE2-100L1-4 type three-phase asynchronous motor with a rated power of 1.5-2.2kW and a rated speed of 1400-2800r / min. A 1024-line incremental encoder is installed on the motor shaft end, which can realize flexible adjustment of rotation and stepless speed regulation. The motor output shaft is fixedly connected to the first synchronous pulley 23 through a flat key. An RV series gearbox reducer with a reduction ratio of 5-20 is installed on the outside of the motor through bolts to assist in improving torque or adjusting and reducing speed. It should be further explained that, during use, this technical solution can be used to install a current sensor on the top of the main base plate 1 near the drive motor 22, depending on the specific application requirements. This sensor is used to monitor the operating current of the drive motor 22 in real time. When the current abnormally increases or decreases, it can provide timely feedback to help determine whether the motor load is overloaded or malfunctioning, providing data support for automatic shutdown protection or manual adjustment. A pressure sensor can be installed below the lifting mounting plate 28 to monitor the force on the connection between the device and the telescopic cylinder, preventing loose connections or loads exceeding the safe range and ensuring operational safety. A flow sensor can be installed inside the cooling main cavity 76 to detect the flow rate of the coolant. When the flow rate is lower than the set value, it will promptly remind you to add coolant or check for blockages, ensuring stable water cooling performance. In addition, a wireless communication module can be added next to the controller as needed to realize information interaction between the device and a remote terminal, facilitating remote monitoring of the operation status or remote parameter adjustment. The above sensors and electronic devices do not require mandatory installation and can be selected and installed according to actual automatic operation requirements or manual assistance requirements.

[0039] A brazing method for diamond drill bits includes the following steps: Step 1: Use metal cutting equipment to cut the steel to process it into drill bit main rod 72 blank and cutter blade 73 blank. Then, use CNC milling machine to mill the outer side of cutter blade 73 blank, leaving the welding area for diamond impregnated block 77. After processing, use ultrasonic cleaning equipment to clean the surface of drill bit main rod 72 blank and cutter blade 73 blank to remove surface oil and impurities. Step 2: Fix the cleaned blade 73 blank on the tooling fixture, calibrate the position of the blade 73 blank using a vision positioning device, and then place the diamond impregnated blocks 77 one by one in the welding area of ​​the blade 73 blank at a preset interval. Use the positioning pins on the tooling fixture to adjust the position of the diamond impregnated blocks 77 so that each diamond impregnated block 77 is evenly distributed in the welding area. Step 3: Use an automatic dispensing device to fill the contact gap between the diamond impregnated block 77 and the blank of the blade 73 with brazing filler metal. During the filling process, the amount of brazing filler metal is monitored in real time by a CCD vision inspection device to ensure that the brazing filler metal completely covers the contact area. Step 4: Using hoisting equipment, place the blank of the blade 73 with the diamond-impregnated block 77 assembled together with the blank of the drill bit main rod 72 into the vacuum brazing furnace. After closing the furnace door, set the brazing temperature and holding time through the furnace control system, start the vacuum system to remove the air in the furnace, and start the heating system to perform the brazing operation after the vacuum degree in the furnace reaches the preset value. Step 5: After the brazing operation is completed, turn off the heating system and maintain the vacuum state inside the furnace. When the temperature inside the furnace cools down to below the preset temperature, turn on the furnace door inert gas replacement system and fill the furnace with nitrogen until the temperature inside the furnace cools down to room temperature. Then, use hoisting equipment to remove the welded assembly of the drill bit main rod 72 and the cutter blade 73. Step 6: Place the removed welding components on a grinding wheel to grind away any residual brazing filler metal at the weld. Then, place the welding components in an acid pickling tank and use a mixed solution for acid pickling to remove oxide scale from the weld and workpiece surface. After acid pickling, rinse the welding components in a clean water tank and finally dry them using a hot air drying device to complete the welding process of the diamond drill bit body 7.

[0040] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A brazed diamond drill bit, characterized in that, include: The main base plate (1) has a drive mechanism (2) fixedly installed on one side of its top, and a linkage mechanism (3) is movably assembled at the bottom of the main base plate (1); the power output end of the drive mechanism (2) is connected to the linkage mechanism (3), the drive mechanism (2) is used to provide driving force to drive the linkage mechanism (3) to operate, and the linkage mechanism (3) is used to transmit the power output by the drive mechanism (2) in the vertical downward direction. The connecting rod is detachably installed at the bottom output end of the linkage mechanism (3) by bolts. The bottom of the connecting rod is provided with a hexagonal slot (4; connecting rod; 5) in the vertical direction. The connecting rod is used to receive the power transmitted by the linkage mechanism (3) and transmit the power to the downstream component, while bearing the load generated during the operation. The pumping module (6) is rotatably mounted on the upper part of the connecting rod. The outer side of the pumping module (6) extends outside the connecting rod and is connected to the linkage mechanism (3) for transmission. The pumping module (6) is used to pump coolant to achieve stable downward delivery of coolant and ensure cooling effect. The diamond drill bit body (7) has its upper end fitted into the hexagonal slot (4; connecting rod; 5). The bottom of the connecting rod is fastened to the diamond drill bit body (7) by bolts. The cross-sectional shape of the hexagonal slot (4; connecting rod; 5) and the cross-sectional shape of the upper end of the diamond drill bit body (7) are both regular hexagons, and the two fit together to transmit the torque required for operation and restrict the relative rotation between the diamond drill bit body (7) and the connecting rod. A hexagonal mounting post (71) is adapted to be inserted into the hexagonal slot (4; connecting rod; 5) and fixedly connected to the connecting rod by bolts. The cross-sectional shape of the hexagonal mounting post (71) is a regular hexagon, which is adapted to the cross-sectional shape of the hexagonal slot (4; connecting rod; 5) and is used to bear the torque generated during the operation of the drill bit. The drill bit main rod (72) is integrally formed and set at the bottom end of the hexagonal mounting post (71). The bottom of the drill bit main rod (72) has integrally formed cutter wings (73) distributed in a ring at equal intervals. Several diamond impregnated blocks (77) are brazed on the outer surface of the cutter wings (73) at equal intervals. The cutter wings (73) are the core drilling execution components of the drill bit and undertake the main drilling operation function. The guide grooves (74) are arranged in a ring at equal intervals on the outer surface of the drill bit main rod (72). The guide grooves (74) are all set in the gap between each cutter blade (73). The inner side of the guide grooves (74) is provided with heat dissipation guide holes (75) at equal intervals. The guide grooves (74) are used to guide the waste chips of the drill bit operation. The cooling main cavity (76) is opened inside the drill bit main rod (72), the hexagonal mounting post (71) and the connecting rod, and is arranged through the axis of the three. The pumping module (6) is rotatably arranged on the upper end of the cooling main cavity (76) on the connecting rod. The bottom end of the cooling main cavity (76) is connected to each of the heat dissipation guide holes (75), and its top is sealed and connected to the cooling water supply part of the drive mechanism (2). The cooling main cavity (76) is used to receive the coolant from the cooling water supply part and stably guide the coolant to each of the heat dissipation guide holes (75). Water cooling heat dissipation during the drill bit drilling process is realized through the flow of coolant.

2. The brazed diamond drill bit according to claim 1, characterized in that, Also includes: Mounting bracket (21) is detachably mounted on one side of the top of main base plate (1) by bolts. A drive motor (22) is mounted on the end of the mounting bracket (21) away from the connecting rod by bolts. A first synchronous pulley (23) is fixedly mounted on the output shaft end of the drive motor (22). The drive motor (22) is used to provide the main power during operation. The second synchronous pulley (24) is rotatably disposed at the top center of the main base plate (1). The bottom of the second synchronous pulley (24) is connected to the input end of the linkage mechanism (3) through a coupling. The second synchronous pulley (24) is connected to the first synchronous pulley (23) through a synchronous belt. The second synchronous pulley (24) is used to transmit the kinetic energy of the drive motor (22) obtained through the synchronous belt to the linkage mechanism (3).

3. The brazed diamond drill bit according to claim 1, characterized in that, Also includes: The support arm (25) is integrally formed and set at one end of the main base frame. The upper end of the support arm (25) is bolted to a connecting support plate (26). The connecting support plate (26) is bolted to one side of the drive motor (22). The support arm (25) and the connecting support plate (26) are used to support and reinforce the drive motor (22).

4. A brazed diamond drill bit according to claim 1, characterized in that, Also includes: The hanger (27) is welded and fixed to the top of the main base plate (1). The top of the hanger (27) is fixedly installed with a lifting mounting plate (28). The four corners of the lifting mounting plate (28) are provided with mounting holes (210). The mounting holes (210) are countersunk holes. The hanger (27), the lifting mounting plate (28) and each of the mounting holes (210) cooperate to assemble the whole device onto the telescopic cylinder of the drilling operation equipment.

5. A brazed diamond drill bit according to claim 1, characterized in that, Also includes: A rotary joint (29) is rotatably connected to the top of the main substrate (1) on the side away from the drive motor (22). A coolant delivery pipe (211) is rotatably connected to the top of the rotary joint (29). The bottom of the rotary joint (29) passes through the main substrate (1) and is fixedly installed on the inner side of the linkage mechanism (3). The connecting rod is installed at the bottom output end of the rotary joint (29) by bolts. The cooling main cavity (76) and the rotary joint (29) are connected. The coolant delivery pipe (211) is used to deliver coolant through the rotary joint (29) into the cooling main cavity (76) and finally into the heat dissipation guide hole (75) for heat dissipation. A connecting flange (212) is welded to the inlet end of the coolant delivery pipe (211). A sealing gasket is provided on the outer inlet end of the connecting flange (212). The connecting flange (212) is used to connect with an external coolant attack pipe.

6. A brazed diamond drill bit according to claim 5, characterized in that, Also includes: The drive gear (31) is rotatably connected to the bottom of the main base plate (1) near the drive motor (22). The top of the drive gear (31) is fixedly connected to the bottom of the second synchronous wheel (24) through a coupling. The drive gear (31) is used to receive and transmit the power output by the drive motor (22). Driven gear ring (32) is fixedly connected to the outer surface of the rotary joint (29) located at the bottom of the main base plate (1). The driven gear ring (32) meshes with the drive gear (31). The driven gear ring (32) is used to receive the power transmitted by the drive gear (31) and transmit the power to the drill bit main rod (72) to drive the diamond drill bit body (7) to rotate. The linkage module (33) is fixedly installed on the bottom outer side of the main base plate (1). The linkage component (63) is used to transmit the power of the driven gear ring (32) to the pumping module (6) so as to achieve the effect of the pumping module (6) rapidly rotating and pumping coolant while the diamond drill bit body (7) is rotating.

7. A brazed diamond drill bit according to claim 6, characterized in that, Also includes: A concave frame (331) is fixedly installed on the bottom outer side of the main base plate (1). A fixing ring (332) is fixedly installed in the middle of the bottom of the concave frame. A beveled ring (333) is welded inside the fixing ring (332). The connecting rod rotates inside the beveled ring (333). The outer side of the pumping module (6) is engaged with the beveled ring (333). The beveled ring (333) is used to transmit the power during the rotation of the connecting rod to the pumping module (6) so that the pumping module (6) pumps coolant.

8. A brazed diamond drill bit according to claim 7, characterized in that, Also includes: A cross (61) is fixedly installed on the upper end of the cooling main cavity (76) on the connecting rod. A rotating shaft (62) is rotatably connected to the top of the cross (61). A propeller (64) is fixedly installed on the outer surface of the rotating shaft (62). The linkage component (63) is located at the upper end of the rotating shaft (62). The linkage component (63) has a connecting rod running through it on one side and is engaged with the bevel gear ring (333). The linkage component (63) is used to form a linkage with the bevel gear ring (333), receive and transmit kinetic energy to the rotating shaft (62). The rotating shaft (62) is used to receive the kinetic energy transmitted by the linkage component (63) and drive the propeller (64) to rotate so as to pump the coolant downward. The coolant is discharged through the heat dissipation guide hole (75) to achieve heat dissipation and cooling during the drilling process.

9. A brazed diamond drill bit according to claim 8, characterized in that, Also includes: An internal shaft (631) is rotatably connected to the upper end of the cooling main cavity (76) on the connecting rod. An internal active bevel gear (632) is fixedly installed in the middle of the internal shaft (631). An external active bevel gear (633) is fixedly installed at one end of the internal shaft (631) through the connecting rod via a sealed coupling. The external active bevel gear (633) meshes with the bevel gear ring (333). The inner driven bevel gear (634) is fixedly connected to the top of the rotating shaft (62). The inner driven bevel gear (634) and the inner driving bevel gear (632) are connected in transmission. When the connecting rod is rotating, it drives the outer driving bevel gear (633) to rotate with the axis of the connecting rod. The driving bevel gear obtains kinetic energy from the stationary bevel ring (333) and transmits it to the inner driving bevel gear (632) through the built-in shaft (631). The inner driving bevel gear (632) drives the rotating shaft (62) through the inner driven bevel gear (634) to drive the propeller (64) to rotate, so as to realize the pumping of coolant toward the heat dissipation guide hole (75).

10. A method for brazing a diamond drill bit, applied to a brazed diamond drill bit as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Use metal cutting equipment to cut the steel to process the drill bit main rod (72) blank and the cutter wing (73) blank. Then, use a CNC milling machine to mill the outer side of the cutter wing (73) blank, leaving a welding area for the diamond impregnated block (77). After processing, use an ultrasonic cleaning device to clean the surface of the drill bit main rod (72) blank and the cutter wing (73) blank to remove surface oil and impurities. Step 2: Fix the cleaned blade (73) blank on the tooling fixture, calibrate the position of the blade (73) blank using a visual positioning device, and then place the diamond-impregnated blocks (77) one by one in the welding area of ​​the blade (73) blank according to the preset spacing. Use the positioning pins on the tooling fixture to adjust the position of the diamond-impregnated blocks (77) so that each diamond-impregnated block (77) is evenly distributed in the welding area. Step 3: Use an automatic dispensing device to fill the contact gap between the diamond impregnated block (77) and the blank of the blade (73). During the filling process, the amount of brazing filler is monitored in real time by a CCD vision inspection device to ensure that the brazing filler completely covers the contact area. Step 4: Using hoisting equipment, place the blank of the cutter wing (73) with the diamond-impregnated block (77) and the blank of the drill rod (72) into the vacuum brazing furnace. After closing the furnace door, set the brazing temperature and holding time through the furnace control system, start the vacuum system to remove the air in the furnace, and start the heating system to perform brazing operation after the vacuum degree in the furnace reaches the preset value. Step 5: After the brazing operation is completed, turn off the heating system and keep the furnace in a vacuum state. When the furnace temperature cools down to below the preset temperature, turn on the furnace door inert gas replacement system and fill the furnace with nitrogen until the furnace temperature cools down to room temperature. Then, use the hoisting equipment to remove the welded assembly of the drill bit main rod (72) and the cutter blade (73). Step 6: Place the removed welding components on a grinding wheel to grind away the residual brazing filler metal at the weld. Then, place the welding components in an acid pickling tank and use a mixed solution for acid pickling to remove the oxide scale from the weld and workpiece surface. After acid pickling, rinse the welding components in a clean water tank and finally dry the welding components using a hot air drying device to complete the welding process of the diamond drill bit body (7).

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