Modularized inner-cooling drill bit with adjustable cooling angle

Abstract

The invention relates to the technical field of cutters, and discloses a modular inner-cooling drill bit with an adjustable cooling angle, the modular inner-cooling drill bit comprises a drill body and a drill rod, a conveying channel is arranged in the drill body, a plurality of mounting cavities are formed in the drill body, a steel block body is fixedly mounted in each mounting cavity, a steel ball is mounted in each steel block body, and the steel balls are arranged in the drill rod. Wherein a cooling hole channel is formed in the steel ball body, a cavity is formed in the steel block body, and a driving ball body is arranged in the cavity; according to the modularized inner-cooling drill bit with the adjustable cooling angle, by changing the position of the driving ball body, the angle of the steel ball body and the angle of a cooling hole channel in the steel ball body are changed through friction force; under the action of the bolt part and the steel shaft body, a worker can manually adjust the driving ball body conveniently, and under the action of the sealing ball body, when the amount of the cooling liquid is increased, the cooling hole channel in the steel ball body recovers to be aligned with the cutting edge of the drill body, so that relatively much cooling liquid is distributed to cool the cutting edge.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting tools, and particularly to a modular internal cooling drill bit with adjustable cooling angle. Background Art

[0002] A modular internal cooling drill bit is an advanced cutting tool, whose design combines the advantages of modularization and internal cooling technology. The modular drill bit consists of multiple replaceable components, including a tool body, a drill tip, cutting edges, etc. This design enables the drill bit to quickly replace components according to different processing requirements, improving processing efficiency and flexibility. The internal cooling technology sets cooling channels inside the drill bit to directly transport coolant (such as compressed air, cutting oil or cutting fluid) to the cutting area, achieving effective cooling of the tool and timely flushing of chips, thereby extending the tool life and improving processing quality and efficiency. During the processing of large castings such as high-strength steel, cemented carbide, and titanium alloy, in order to reduce the influence of cutting heat on the drill bit, an internal cooling drill bit with a relatively large volume is usually selected for hole opening work to ensure that the drill bit has sufficient rigidity and cooling performance. When drilling large castings, a large amount of heat accumulates on the surface area of the drill bit. Therefore, coolant is required to cool the drill bit part. However, during the actual drilling process, the castings often have changes in processing conditions due to processing parameters (such as cutting speed, feed rate, cutting depth). When the processing conditions change, the cooling angle of the drill bit may not be able to adapt to the dynamic changes during the processing process. As a result, it is easy to cause the coolant to not completely cover the cutting area, leading to overheating of the drill bit, affecting the service life of the drill bit and the processing quality of the castings. For this reason, we propose a modular internal cooling drill bit with adjustable cooling angle. Summary of the Invention

[0003] The purpose of the present invention is to provide a modular internal cooling drill bit with adjustable cooling angle to solve the problems raised in the above background art.

[0004] To achieve the above object, the present invention provides the following technical solution: A modular internal cooling drill bit with adjustable cooling angle, comprising a drill body and a drill rod. A conveying channel communicating with the coolant channel in the drill rod is arranged in the drill body. A plurality of installation chambers are arranged on the drill body. A steel block is fixedly installed in each installation chamber, and a steel sphere is installed in each steel block. A cooling hole communicating with the conveying channel is arranged in the steel sphere. A cavity is formed in the steel block, and a driving sphere contacting the steel sphere is arranged in the cavity to control the angle adjustment of the steel sphere through the driving sphere. A driving shaft body is arranged in the cavity, and the driving sphere is rotatably connected to the driving shaft body. A support shaft body is fixedly installed in the cavity. The driving shaft body is limited and slides on the support shaft body. A bolt part threadedly connected to its inner wall is installed on the steel block. A connecting part is arranged between the bolt part and the driving sphere. The bolt part controls the position adjustment of the driving sphere through the connecting part, so that the steel sphere and the cooling hole in it are adjusted in angle.

[0005] Preferably, the connecting part includes a steel shaft rotatably connected to the bolt part. One end of the steel shaft is located in the cavity. A circular panel is fixedly installed at the end of the steel shaft. A circular sleeve is also fixedly installed on the circular panel. A connecting panel is fixedly installed at one end of the driving sphere. A fixed shaft is fixedly installed on the connecting panel. The fixed shaft is located inside the circular sleeve.

[0006] Preferably, a plurality of clamping blocks are installed on the connecting panel. The plurality of clamping blocks are evenly distributed at equal angles in a ring on the connecting panel. The clamping block includes an inclined area and a clamping area. A transmission panel rotatably connected to its outer wall is installed on the circular sleeve. The transmission panel is fixedly installed with a plurality of L-shaped blocks corresponding to the clamping blocks one by one. A plurality of spherical expansion parts one are installed on the L-shaped blocks. The spherical expansion parts one can perform a contraction movement under the action of the inclined area. A torsion spring one is connected between the transmission panel and the circular panel.

[0007] Preferably, spherical expansion parts two are symmetrically installed on the fixed shaft. Symmetrically arranged arc-shaped grooves are arranged inside the circular sleeve. Two guiding panels are arranged in the intersecting area of the two arc-shaped grooves. One side of each guiding panel is an inclined surface and the other side is a right-angle surface. The arc-shaped grooves are located on the movement track of the spherical expansion parts two. The arc-shaped grooves and the side wall of the circular sleeve are both inclined.

[0008] Preferably, a plurality of iron blocks are also fixedly installed on the connecting panel. A plurality of ring magnets corresponding to the iron blocks one by one are fixedly installed on the transmission panel. The ring magnets generate an attractive force on the iron blocks.

[0009] Preferably, the liquid inlet of the cooling channel is communicated with the liquid outlet of the conveying channel, and the aperture of the liquid inlet of the cooling channel is larger than that of the liquid outlet.

[0010] Preferably, a constant force spring is connected between the support shaft body and the driving shaft body, and a torsion spring II is connected between the driving shaft body and the driving sphere.

[0011] Preferably, a sealing sphere is arranged in the conveying channel, and an extension shaft body is fixedly installed on the sealing sphere. The end of the extension shaft body is located inside the cavity, and a force application part is fixedly installed at the end of the extension shaft body. A return spring is connected between the force application part and the inner wall of the cavity. A force receiving rod frame is fixedly installed on the transmission panel, and the force receiving rod frame is located on the movement track of the force application part.

[0012] Preferably, a threaded sleeve connected to the drill pipe by threads is fixedly installed on the drill body, and a conical block is fixedly installed inside the drill pipe, and the inner wall of the threaded sleeve is in threaded connection with the conical block.

[0013] Preferably, a closing steel plate is installed on the steel block, and a connecting rod frame rotatably connected to its inner wall is installed on the closing steel plate. A strip-shaped groove is opened at the end of the steel shaft body, and the end of the connecting rod frame is adapted to the strip-shaped groove. When the closing steel plate is fixed on the steel block, the end of the connecting rod frame is located in the strip-shaped groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: By changing the position of the driving sphere, the present invention utilizes the frictional force to change the angle of the steel sphere and the cooling channel inside it, so as to adjust the cooling angle of the internal cooling drill bit. And under the action of the bolt part and the steel shaft body, it is convenient for the staff to manually adjust the driving sphere. Under the action of the sealing sphere, when the coolant volume increases, the cooling channel in the steel sphere returns to align with the cutting edge of the drill body, so as to distribute relatively more coolant to cool the cutting edge. Furthermore, under the structural design of the present invention, the cooling angle of the drill body can be effectively adjusted to avoid overheating of the drill body. Brief Description of the Drawings

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the drill body structure of the present invention; Figure 3 is a schematic diagram of the separation of the drill body and the steel block structure of the present invention; Figure 4 is a schematic diagram of the internal structure of the steel block of the present invention; Figure 5Schematic diagram of the steel sphere and steel block structure of the present invention; Figure 6 Schematic diagram of the connection part structure of the present invention; Figure 7 Schematic diagram of the internal structure of the drive shaft body and drive sphere of the present invention; Figure 8 Schematic side view of the circular panel, transmission panel and connection panel structures of the present invention; Figure 9 Schematic diagram of the connection panel structure of the present invention; Figure 10 Schematic diagram of the fixed shaft body and circular sleeve structure of the present invention; Figure 11 Schematic diagram of the arc-shaped groove structure of the present invention; Figure 12 Schematic diagram of the sealed sphere and conveying channel structure of the present invention.

[0016] In the figure: 1, drill body; 2, drill pipe; 21, conical block; 3, conveying channel; 4, installation chamber; 5, steel block; 51, cavity; 52, drive sphere; 53, drive shaft body; 54, support shaft body; 55, bolt part; 56, connection panel; 561, iron block; 57, fixed shaft body; 571, spherical expansion part two; 58, clamping block; 581, inclined area; 582, clamping area; 59, constant force spring; 50, torsion spring two; 6, steel sphere; 61, cooling hole; 7, connection part; 71, steel shaft body; 711, strip groove; 72, circular panel; 73, circular sleeve; 731, transmission panel; 732, L-shaped block; 733, spherical expansion part one; 734, torsion spring one; 735, arc-shaped groove; 736, guiding panel; 737, annular magnet; 738, force-bearing rod frame; 8, sealed sphere; 81, extension shaft body; 82, force-applying part; 83, return spring; 9, threaded sleeve; 10, closed steel plate; 101, connecting rod frame. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-12 , the present invention provides a technical solution: a modular internal cooling drill bit with adjustable cooling angle. The present invention makes corresponding improvements to the technical problems in the background technology, including a drill body 1 and a drill pipe 2, in combination with the attached Figure 1 and the attached Figure 2As shown, a threaded sleeve 9 that is threadedly connected to the drill pipe 2 is fixedly installed on the drill body 1, and a conical block 21 is fixedly installed inside the drill pipe 2. Thread grooves are provided on the outer wall of the conical block 21, that is, the inner wall of the threaded sleeve 9 is threadedly connected to the conical block 21. The drill pipe 2 and the drill body 1 are connected by threads. By modularizing the design of the drill bit, it is convenient for the staff to replace the drill body 1 or the drill pipe 2. A conveying channel 3 that communicates with the coolant channel inside the drill pipe 2 is provided inside the drill body 1. It should be noted that the coolant channel inside the drill pipe 2 is a component of the prior art, and thus the present invention does not describe it in detail. Combining the attached Figure 3 As shown, a plurality of installation chambers 4 are provided on the drill body 1, and a steel block 5 is fixedly installed in each installation chamber 4. Combining the attached Figure 4 and the attached Figure 5 As shown, a steel sphere 6 is installed in each steel block 5. A cooling hole 61 that communicates with the conveying channel 3 is provided inside the steel sphere 6, that is, the liquid inlet of the cooling hole 61 communicates with the liquid outlet of the conveying channel 3. Moreover, the aperture of the liquid inlet of the cooling hole 61 is larger than the aperture of the liquid outlet, and the aperture of the liquid inlet of the cooling hole 61 is also larger than the liquid outlet of the conveying channel 3. Thus, when the angle of the steel sphere 6 changes, the coolant spraying angle of the drill bit also changes accordingly; Based on this, the present invention makes the following design: Combining the attached Figure 4 and the attached Figure 5 As shown, a cavity 51 is provided in the steel block 5 of the present invention, and a support shaft body 54 is fixedly installed inside the cavity 51. A driving shaft body 53 that is slidably connected to its outer wall is installed on the support shaft body 54. A constant force spring 59 is connected between the driving shaft body 53 and the support shaft body 54. A driving sphere 52 that is rotatably connected to it is also installed on the driving shaft body 53, and a torsion spring two 50 is connected between the driving sphere 52 and the driving shaft body 53. The driving sphere 52 and the steel sphere 6 are in contact with each other. Thus, when the position of the driving sphere 52 is adjusted, the steel sphere 6 will change its angle accordingly. To facilitate manual adjustment by the staff, a bolt part 55 that is threadedly connected to its inner wall is installed on the steel block 5. A connecting part 7 is provided between the bolt part 55 and the driving sphere 52. The bolt part 55 controls the position adjustment of the driving sphere 52 through the connecting part 7, so that the steel sphere 6 and the cooling hole 61 inside it are adjusted in angle.

[0019] As a further limitation in the present invention, the connecting part 7 includes a steel shaft body 71 that is rotatably connected to the bolt part 55. One end of the steel shaft body 71 is located inside the cavity 51. Combining the attached Figure 5 、the attached Figure 6 and the attached Figure 8As shown, a closed steel plate 10 is installed on the steel block 5. The closed steel plate 10 is fixedly connected to the steel block 5 by screws. A connecting rod frame 101 rotatably connected to its inner wall is installed on the closed steel plate 10. A strip-shaped groove 711 is formed at the end of the steel shaft body 71, and the end of the connecting rod frame 101 is adapted to the strip-shaped groove 711. When the closed steel plate 10 is fixed to the steel block 5 and the end of the connecting rod frame 101 is located in the strip-shaped groove 711, when the staff needs to rotate the steel shaft body 71, the staff can directly rotate the connecting rod frame 101 on the closed steel plate 10, and use the end of the connecting rod frame 101 located in the strip-shaped groove 711 to rotate the steel shaft body 71. After the rotation is completed, the staff fixes the connecting rod frame 101 to the closed steel plate 10 with screws; Combined with the attached Figure 6 , attached Figure 8 and attached Figure 10 As shown, a circular panel 72 is fixedly installed at the end of the steel shaft body 71, and a circular sleeve 73 is also fixedly installed on the circular panel 72. One end of the driving sphere 52 is also fixedly installed with a connecting panel 56, and a fixed shaft body 57 is fixedly installed on the connecting panel 56. The fixed shaft body 57 is located inside the circular sleeve 73. A plurality of clamping block bodies 58 are installed on the connecting panel 56. The plurality of clamping block bodies 58 are annularly and equally angularly distributed on the connecting panel 56, and the clamping block body 58 includes an inclined area 581 and a clamping area 582; A transmission panel 731 rotatably connected to its outer wall is installed on the circular sleeve 73. The transmission panel 731 is fixedly installed with a plurality of L-shaped block bodies 732 corresponding to the clamping block bodies 58 one by one, and a plurality of spherical expansion parts one 733 are installed on the L-shaped block bodies 732, and the spherical expansion parts one 733 can perform lifting movements under the action of the inclined area 581. A torsion spring one 734 is connected between the transmission panel 731 and the circular panel 72; Spherical expansion parts two 571 are symmetrically installed on the fixed shaft body 57, and arc-shaped grooves 735 are symmetrically arranged inside the circular sleeve 73. Two guiding panels 736 are also arranged in the intersecting area of the two arc-shaped grooves 735. One side of each guiding panel 736 is an inclined surface and the other side is a right-angle surface. The arc-shaped grooves 735 are located on the movement track of the spherical expansion parts two 571. The arc-shaped grooves 735 and the side wall of the circular sleeve 73 are both inclined. A plurality of iron block bodies 561 are also fixedly installed on the connecting panel 56, and a plurality of annular magnets 737 corresponding to the iron block bodies 561 one by one are fixedly installed on the transmission panel 731. The annular magnets 737 generate an attractive force on the iron block bodies 561.

[0020] In the initial state, the liquid outlet of the cooling channel in the steel sphere 6 is aligned with the cutting edge of the drill body 1, that is, the spraying angle of the coolant is aligned with the cutting edge of the drill body 1. The reason for this design is as follows: During the cutting process, due to high-speed rotation and huge pressure, intense friction will occur between the cutting edge and the casting, generating a large amount of heat energy. Compared with other areas of the drill body 1, the temperature of the cutting edge area is relatively high. Therefore, the spraying angle of the coolant is aligned with the cutting edge of the drill body 1 to distribute a relatively large amount of coolant to cool the cutting edge. It should be noted that other areas of the drill body 1 will still be completely covered by the cutting fluid, and when the cutting fluid flows out, a relatively large amount of coolant will directly contact the cutting edge.

[0021] Specifically, when the staff needs to adjust the spraying angle of the coolant, they can selectively rotate the steel shaft body 71 or the bolt part 55 according to the adjustment angle. As shown in the attached Figure 4 When it is necessary to adjust the angle of the steel sphere 6 by rotating the driving sphere 52, at this time, the staff can remove the screw that fixes the connecting rod frame 101 on the closed steel plate 10, so that the connecting rod frame 101 can rotate on the closed steel plate 10. Rotate the connecting rod frame 101, and the end of the connecting rod frame 101 uses the strip groove 711 on the steel shaft body 71 to drive the steel shaft body 71 to rotate. The steel shaft body 71 rotates in the bolt part 55. During the rotation of the steel shaft body 71, the circular panel 72 at its end will move synchronously with it, that is, the circular panel 72 drives the circular sleeve 73 to rotate. It should be noted that in the initial state, the liquid outlet of the cooling channel in the steel sphere 6 is aligned with the cutting edge of the drill body 1. At this time, the end of the bolt part 55 has penetrated into the cavity 51. When it is necessary to adjust the spraying angle of the coolant, that is, to adjust the angle of the steel sphere 6, the bolt part 55 can only be screwed out of the outside of the steel block 5. Of course, if the liquid outlet of the cooling channel in the steel sphere 6 is not in the initial state, that is, the liquid outlet of the cooling channel is not aligned with the cutting edge of the drill body 1, the bolt part 55 can perform screwing-in or screwing-out actions. Combined with the attached Figure 9 、attached Figure 10 and attached Figure 11, in the initial state, the fixed shaft body 57 on the connection panel 56 is located inside the circular sleeve 73, the spherical expansion part two 571 on the fixed shaft body 57 is located inside the arc groove 735, and the spherical expansion part two 571 is located between the two guiding panels 736. The right-angled surfaces of the two guiding panels 736 are in contact with the spherical expansion part two 571. Then, when the circular panel 72 drives the circular sleeve 73 to rotate, at this time, the arc groove 735 and the guiding panels 736 inside the circular sleeve 73 rotate synchronously with it. The right-angled surface of the guiding panel 736 acts on the spherical expansion part two 571, and the spherical expansion part two 571 is subjected to a force to drive the fixed shaft body 57 to rotate, and the fixed shaft body 57 drives the connection panel 56 to rotate, so as to drive the driving sphere 52 to rotate. Since the driving sphere 52 is in contact with the steel sphere 6, the friction force is used to change the angle of the steel sphere 6. And during the rotation of the driving sphere 52, the torsion spring two 50 connected between it and the driving shaft body 53 will deform, so that the torsion spring two 50 is in a tightened and energy-stored state; Continuing from the above, when the circular sleeve 73 rotates, the transmission panel 731 on it will rotate under the action of the torsion spring one 734, and then the transmission panel 731 rotates inside the circular sleeve 73. The L-shaped block 732 on the transmission panel 731 rotates synchronously with the clamping block 58, and the spherical expansion part one 733 on the L-shaped block 732 is still located inside the clamping area 582.

[0022] When the liquid outlet of the cooling channel in the steel sphere 6 is in the initial state of being aligned with the cutting edge of the drill body 1, during the process of the staff adjusting the spraying angle of the coolant, if it is necessary to adjust the spraying angle in multiple directions, at this time, it may be necessary to rotate both the steel shaft body 71 and the bolt part 55. Then, in the present invention, the bolt part 55 is preferably rotated first. Since the bolt part 55 is threadedly connected to the inner wall of the steel block 5, and the steel shaft body 71 is rotatably connected to the inside of the bolt part 55, in the specific operation, the staff first uses a tool to remove the closing steel plate 10 from the steel block 5, and the bolt part 55 is exposed. Then, a screwdriver is used to rotate the bolt part 55, so that the bolt part 55 moves towards the outside of the steel block 5. During the movement of the bolt part 55 towards the outside of the steel block 5, since the bolt part 55 is rotatably connected to the steel shaft body 71, the bolt part 55 drives the steel shaft body 71 to move synchronously. During the movement of the steel shaft body 71, the circular panel 72 at its end will drive the circular sleeve 73 to move synchronously, combined with Attached Figure 6 Attachment Figure 8 And Attachment Figure 9As shown, when the circular sleeve 73 moves outward from the steel block 5, the transmission panel 731 on the circular sleeve 73 moves synchronously with it, and the L-shaped block 732 on the transmission panel 731 will drive the spherical telescopic part 733 to move synchronously. Since the spherical telescopic part 733 is located at the clamping area 582 of the clamping block 58, the spherical telescopic part 733 will apply a force to the clamping area 582. Thus, under the action of the clamping area 582, the clamping block 58 drives the driving sphere 52 to move directionally through the connecting panel 56. And because the driving sphere 52 is rotatably connected to the driving shaft body 53, the driving shaft body 53 slides in a limited manner on the support shaft body 54. When the driving sphere 52 moves outward from the steel block 5, it applies a force to the steel sphere 6, so that the steel sphere 6 makes an angle adjustment. And during the process that the driving shaft body 53 slides in a limited manner on the support shaft body 54, the constant force spring 59 is in a stretched state. It should be noted that in the initial state, the fixed shaft body 57 on the connecting panel 56 is located inside the circular sleeve 73. When the annular magnet 737 generates an attractive force on the iron block 561, that is, when the spherical telescopic part 733 is located inside the clamping area 582, the spherical telescopic part 571 on the fixed shaft body 57 is located between the right-angle surfaces of the two guiding panels 736. When the rotating bolt part 55 is rotated, the bolt part 55 drives the steel shaft body 71 to move synchronously. At this time, under the action of the clamping area 582 and the spherical telescopic part 733, the connecting panel 56 moves; during the drilling operation of the drill 1, if the cooling hole 61 in the steel sphere 6 needs to be adjusted multiple times due to process requirements, the driving sphere 52 may rotate or move forward; when the driving sphere 52 rotates, the torsion spring two 50 between the driving sphere 52 and the driving shaft body 53 is already in a tightened and energy-storing state, that is, the connecting panel 56 has a tendency to move in a reset manner, and the fixed shaft body 57 and the spherical telescopic part 571 on the connecting panel 56 also have a tendency to move in a reset manner. However, since the spherical telescopic part 571 is located between the right-angle surfaces of the two guiding panels 736, the guiding panel 736 will hinder the reset movement of the spherical telescopic part 571; When the bolt part 55 rotates to the specified position, at this time, it is necessary to rotate the steel shaft body 71. Then the staff can use screws to fix the closing steel plate 10 on the steel block 5 again. Subsequently, the screws fixing the connecting rod frame 101 on the closing steel plate 10 are removed, so that the connecting rod frame 101 can rotate on the closing steel plate 10, and then the connecting rod frame 101 drives the steel shaft body 71 to rotate. The rotation of the steel shaft body 71 is as shown above, so that the driving sphere 52 changes the angle of the steel sphere 6 by using friction during the rotation process, so as to adjust the spraying angle of the coolant.

[0023] After the staff adjusts the angle of the steel sphere 6 according to the processing conditions, the liquid outlet of the cooling channel in the steel sphere 6 may be aligned with other areas of the drill body 1 at this time, so as to cool the drill body 1 during the drilling operation. However, during the actual drilling process, when the drill body 1 may accumulate heat due to the stress change of the casting or the influence of other processing factors, since there will be intense friction between the cutting edge and the casting, usually heat will accumulate at the cutting edge. When the machine tool monitors that the temperature of the drill body 1 is too high through the temperature sensing element, it will increase the output of the coolant. However, at this time, the spraying angle of the coolant may not be adjusted to align with the cutting edge of the drill body 1, and the cutting edge may not be quickly cooled in the first time. Based on this, the present invention makes corresponding designs so that when the output of the coolant increases, the cooling channel in the steel sphere 6 is adjusted to the initial position to distribute relatively more coolant to cool the cutting edge; that is, the present invention is provided with a sealing sphere 8 in the conveying channel 3, and an extension shaft body 81 is fixedly installed on the sealing sphere 8. The end of the extension shaft body 81 is located inside the cavity 51, and a force applying portion 82 is fixedly installed at the end of the extension shaft body 81. A return spring 83 is connected between the force applying portion 82 and the inner wall of the cavity 51. A force receiving rod frame 738 is fixedly installed on the transmission panel 731, and the force receiving rod frame 738 is located on the movement track of the force applying portion 82; Combined with the attached Figure 12As shown, when the machine tool monitors through the temperature sensor that the temperature of the drill body 1 is too high, the output of the coolant is increased. The normal output of the coolant can ensure that the sealing sphere 8 does not block the conveying channel 3, guaranteeing the normal conveyance of the coolant. Moreover, the force-applying part 82 at the end of the extension shaft body 81 is close to but does not contact the force-receiving rod frame 738. When the output of the coolant is increased, the moving distance of the sealing sphere 8 increases, that is, the moving distance of the extension shaft body 81 and its end force-applying part 82 increases, and the return spring 83 is in a stretched state. As a result, the force-receiving rod frame 738 will rotate under the action of the force-applying part 82. The force-receiving rod frame 738 drives the transmission panel 731 to rotate under the action of the force-applying part 82. During the rotation of the transmission panel 731, the first torsion spring 734 is in a deformed state, and thus the annular magnet 737, the L-shaped block 732, and the first spherical telescopic part 733 on the transmission panel 731 rotate synchronously with it. During the rotation, the annular magnet 737 moves away from the corresponding position of the iron block 561, that is, the annular magnet 737 no longer generates an attractive force on the iron block 561. The first spherical telescopic part 733 on the L-shaped block 732 will move out of the clamping area 582, and thus the clamping area 582 is no longer blocked by the first spherical telescopic part 733. Since the constant force spring 59 is in a stretched state, under the action of the stretched constant force spring 59, the driving shaft body 53 drives the driving sphere 52 to move back to its original position. During this process, the clamping block 58 on the connecting panel 56 moves synchronously with it, and the second spherical telescopic part 571 on the fixed shaft body 57 will move from the arc-shaped groove 735 to the outside of the circular sleeve 73. Further, it should be noted that the arc-shaped groove 735 and the side wall of the circular sleeve 73 in the present invention are both inclined. Therefore, when the second spherical telescopic part 571 moves to the outside of the circular sleeve 73, the second spherical telescopic part 571 will be in a contracted state. After the second spherical telescopic part 571 leaves the circular sleeve 73, it will return to its original state. Thus, the driving shaft body 53 returns to its initial position under the action of the stretched constant force spring 59, and the driving sphere 52 returns to its initial state under the action of the second torsion spring 50. During the process of the driving sphere 52 returning to its initial state, the iron block 561 on the connecting panel 56 may pass through the corresponding position of the annular magnet 737, but the passing time of the iron block 561 is relatively short. Therefore, the annular magnet 737 cannot effectively generate enough attraction force on the iron block 561. During the process of the driving sphere 52 returning to its initial state under the action of the second torsion spring 50, the driving sphere 52 applies a force to the steel sphere 6, so that the steel sphere 6 returns to its initial position under the action of friction, that is, the liquid outlet of the cooling channel in the steel sphere 6 is aligned with the cutting edge of the drill body 1. Thus, when too much heat accumulates in the drill body 1, the output of the coolant is increased, and the cooling channel in the steel sphere 6 is adjusted to its initial position to distribute relatively more coolant to cool the cutting edge; When the coolant resumes its normal output, the extension shaft body 81 and the sealing sphere 8 move in the reverse direction under the action of the stretched return spring 83. That is, the force application part 82 no longer exerts a force on the force receiving rod frame 738. Furthermore, the transmission panel 731 returns to its initial position under the action of the first torsion spring 734, that is, the multiple annular magnets 737 return to their initial positions. During this process, the multiple annular magnets 737 will generate an attractive force on the iron block 561. It should be noted that when the driving sphere 52 returns to its initial position, the iron block 561 on the connecting panel 56 is at the corresponding position of the annular magnet 737 under normal conditions. That is, the annular magnet 737 will generate an attractive force on the iron block 561, and then the connecting panel 56 drives the driving shaft body 53 to move in a specific direction. At this time, the constant force spring 59 is in a stretched state, and the clamping block 58 on the connecting panel 56 will pass through the spherical telescopic part 733 and can contract under the action of the inclined area 581. The spherical telescopic part 733 finally enters the clamping area 582 to limit the connecting panel 56. It should be noted that, as shown in the attached Figure 6 As shown, when the spherical telescopic part 733 enters the clamping area 582 and is limited by the clamping area 582, at this time, the annular magnet 737 and the iron block 561 are not in contact. At the same time, the spherical telescopic part 571 on the fixed shaft body 57 will enter through the side wall of the circular sleeve 73. Since the side wall of the circular sleeve 73 is inclined, the spherical telescopic part 571 is in a contracted state during this process and enters the arc-shaped groove 735. Under the action of the arc-shaped groove 735, the spherical telescopic part 571 passes through the inclined surface of the guiding panel 736 and finally returns between the two guiding panels 736. Therefore, through the structural design of the present invention, the cooling channels in the steel sphere 6 can be adjusted according to the drilling process for the corresponding cooling angles. Also, when the temperature of the drill body 1 is too high, the liquid outlet of the cooling channels in the steel sphere 6 can be aligned with the cutting edge of the drill body 1, so as to distribute relatively more coolant to cool the cutting edge.

[0024] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular internal cooling drill bit with adjustable cooling angle, characterized in that It includes a drill body (1) and a drill pipe (2). A conveying channel (3) communicating with the coolant channel in the drill pipe (2) is arranged in the drill body (1). A plurality of mounting chambers (4) are arranged on the drill body (1). A steel block (5) is fixedly installed in each mounting chamber (4), and a steel sphere (6) is installed in each steel block (5). A cooling hole (61) communicating with the conveying channel (3) is arranged in the steel sphere (6). A cavity (51) is formed in the steel block (5), and a driving sphere (52) contacting the steel sphere (6) is arranged in the cavity (51). The angle of the steel sphere (6) is adjusted by the driving sphere (52). A driving shaft body (53) is arranged in the cavity (51). The driving sphere (52) is rotatably connected to the driving shaft body (53). A support shaft body (54) is fixedly installed in the cavity (51). The driving shaft body (53) is limited and slides on the support shaft body (54). A bolt part (55) threadedly connected to its inner wall is installed on the steel block (5). A connecting part (7) is arranged between the bolt part (55) and the driving sphere (52). The position of the driving sphere (52) is adjusted by the bolt part (55) through the connecting part (7), so that the steel sphere (6) and the cooling hole (61) inside it are adjusted in angle.

2. The modular internal cooling drill bit with adjustable cooling angle according to claim 1, characterized in that: The connecting part (7) includes a steel shaft body (71) rotatably connected to the bolt part (55). One end of the steel shaft body (71) is located in the cavity (51). A circular panel (72) is fixedly installed at the end of the steel shaft body (71). A circular sleeve (73) is also fixedly installed on the circular panel (72). A connecting panel (56) is fixedly installed at one end of the driving sphere (52). A fixed shaft body (57) is fixedly installed on the connecting panel (56). The fixed shaft body (57) is located inside the circular sleeve (73).

3. The modular internal cooling drill bit with adjustable cooling angle according to claim 2, characterized in that: A plurality of clamping blocks (58) are installed on the connecting panel (56). The plurality of clamping blocks (58) are annularly and equally angularly distributed on the connecting panel (56). The clamping block (58) includes an inclined area (581) and a clamping area (582). A transmission panel (731) rotatably connected to its outer wall is installed on the circular sleeve (73). A plurality of L-shaped blocks (732) corresponding to the clamping blocks (58) one by one are fixedly installed on the transmission panel (731). A plurality of spherical expansion parts one (733) are installed on the L-shaped blocks (732). The spherical expansion parts one (733) can perform a contraction movement under the action of the inclined area (581). A torsion spring one (734) is connected between the transmission panel (731) and the circular panel (72).

4. The modular internal cooling drill bit with adjustable cooling angle according to claim 3, characterized in that: The spherical expansion part two (571) is symmetrically installed on the fixed shaft body (57), and symmetrically arranged arc-shaped grooves (735) are provided inside the circular sleeve (73). Two guiding panels (736) are also provided in the intersecting area of the two arc-shaped grooves (735). One side of each guiding panel (736) is an inclined surface and the other side is a right-angle surface. The arc-shaped groove (735) is located on the movement track of the spherical expansion part two (571), and both the arc-shaped groove (735) and the side wall of the circular sleeve (73) are arranged in an inclined shape.

5. The modular internal cooling drill bit with adjustable cooling angle according to claim 4, characterized in that: A plurality of iron blocks (561) are fixedly installed on the connecting panel (56), and a plurality of annular magnets (737) corresponding to the iron blocks (561) one by one are fixedly installed on the transmission panel (731). The annular magnets (737) generate an attractive force on the iron blocks (561).

6. The modular internal cooling drill bit with adjustable cooling angle according to claim 1, wherein: The liquid inlet of the cooling hole (61) is communicated with the liquid outlet of the conveying channel (3), and the aperture of the liquid inlet of the cooling hole (61) is larger than the aperture of the liquid outlet.

7. A modular internal cooling drill bit with adjustable cooling angle according to claim 3, characterized in that: A constant force spring (59) is connected between the support shaft body (54) and the drive shaft body (53), and a torsion spring two (50) is connected between the drive shaft body (53) and the drive sphere (52).

8. A modular internal cooling drill bit with adjustable cooling angle according to claim 7, characterized in that: A sealing sphere (8) is arranged in the conveying channel (3), and an extension shaft body (81) is fixedly installed on the sealing sphere (8). The end of the extension shaft body (81) is located inside the cavity (51), and a force application part (82) is fixedly installed at the end of the extension shaft body (81). A return spring (83) is connected between the force application part (82) and the inner wall of the cavity (51). A force receiving rod frame (738) is fixedly installed on the transmission panel (731), and the force receiving rod frame (738) is located on the movement track of the force application part (82).

9. A modular internal cooling drill bit with adjustable cooling angle according to any one of claims 1-8, characterized in that: A threaded sleeve (9) threadedly connected to the drill rod (2) is fixedly installed on the drill body (1), a conical block (21) is fixedly installed inside the drill rod (2), and the inner wall of the threaded sleeve (9) is threadedly connected to the conical block (21).

10. A modular internal cooling drill bit with adjustable cooling angle according to claim 2, characterized in that: A closed steel plate (10) is installed on the steel block (5), and a connecting rod frame (101) rotatably connected to its inner wall is installed on the closed steel plate (10). A strip-shaped groove (711) is opened at the end of the steel shaft body (71), and the end of the connecting rod frame (101) is adapted to the strip-shaped groove (711). When the closed steel plate (10) is fixed on the steel block (5), the end of the connecting rod frame (101) is located in the strip-shaped groove (711).

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