A twist drill tool for deep hole machining

Abstract

The application relates to the technical field of drilling tools, in particular to a twist drill tool for deep hole machining, which comprises a mounting shaft, a twist drill main body and a pushing guide block, a chip removal groove is arranged on the twist drill main body, a second chip removal liquid injection hole is arranged on the twist drill main body, an eccentric injection pipe is eccentrically fixedly connected to a rotating cylinder and is in an inclined state, when the eccentric injection pipe sprays high-pressure cooling liquid, the eccentric injection pipe will be subjected to an outward acceleration effect, so that the eccentric injection pipe is subjected to a reaction force which is equal in size and opposite in direction, the eccentric injection pipe which is arranged in an inclined and eccentric mode utilizes the spraying reaction force to generate a rotating torque, so that the eccentric injection pipe carries the rotating cylinder to rotate along the rotation position of a second hollow rotating ball, during the rotating process, the eccentric injection pipe which rotates in a circumferential mode sprays the cooling liquid in a circumferential track outward, can destroy the accumulation stable state among the cuttings, weaken the friction locking effect among the cuttings, and then flushes away the cuttings to complete the dredging.

Description

Technical Field

[0001] This invention relates to the field of drilling tool technology, specifically a twist drill tool for deep hole machining. Background Technology

[0002] Twist drills are widely used hole-making tools, primarily for drilling metal and alloy workpieces. They typically consist of a drill shank, a drill body, and a cutting edge at the end of the drill body. With advancements in machining technology, some components require higher precision in hole depth, diameter, and wall quality, making deep hole machining a common machining need. Compared to ordinary drilling, deep hole machining involves the drill bit penetrating deep into the workpiece for long-distance cutting, with the drill bit's working area situated within a relatively enclosed cavity environment.

[0003] During deep hole machining, chips generated need to be discharged outward along the spiral chip removal grooves set on the outer periphery of the twist drill. However, as the hole depth increases, the chip transport distance becomes longer, and chips tend to accumulate in the chip removal grooves, causing chip removal obstruction. In severe cases, chips may even block the drill gap, increasing drilling resistance and affecting machining continuity. Some existing drill bits with internal cooling structures can deliver coolant to the front end of the drill bit for flushing and assisting chip removal. However, as the drilling depth increases, the chip stacking at the deepest point is the most severe, and the chips rub and lock together. After drilling, they tend to remain in the chip removal grooves and workpiece holes. Since deep hole machining is carried out in a relatively closed working space, conventional methods of delivering coolant for flushing are difficult to fully flush the chips stuck together at the bottom of the deep hole. On the other hand, the long drilling stroke causes the coolant's assisting pushing force to gradually lose its effectiveness in the middle of the drilling, resulting in insufficient cooling and chip removal effects. Summary of the Invention

[0004] The purpose of this invention is to provide a twist drill for deep hole machining, in order to solve the problems mentioned in the background art, such as the difficulty in fully flushing the chips stuck together at the bottom of the deep hole by the conventional method of conveying coolant, and the gradual failure of the coolant-assisted pushing force in the middle of the drilling due to the long drilling stroke.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a twist drill tool for deep hole machining, comprising a mounting shaft, a twist drill body, and a push block. The twist drill body has a chip removal groove and a second chip removal spray hole. A first hollow rotating ball and a second hollow rotating ball are rotatably mounted on the inner wall of the second chip removal spray hole. Two O-rings are fixedly connected to the inner wall of the second chip removal spray hole. The inner walls of the two O-rings are tightly fitted to the outer walls of the second hollow rotating ball and the first hollow rotating ball, respectively. Both the first and second hollow rotating balls have through grooves. A fixing ring is fixedly connected to both the first and second hollow rotating balls. A return spring is fixedly connected to the outer wall of the fixing ring corresponding to the second hollow rotating ball. The other end of the return spring is fixedly connected to the outer wall of the fixing ring corresponding to the first hollow rotating ball.

[0006] Preferably, the outer walls of both the first hollow rotating ball and the second hollow rotating ball are rotatably connected to a rotating cylinder, and the outer wall of the rotating cylinder is eccentrically fixedly connected to an eccentric injection pipe.

[0007] Preferably, a second rotating sealing ring is fixedly connected to the first hollow rotating ball and the second hollow rotating ball.

[0008] Preferably, the inside of the twist drill body is provided with an infusion groove, the inner wall of the infusion groove is provided with two sliding guide grooves, the inner wall of the sliding guide groove is slidably installed with guide balls, the guide balls are rotatably installed on the outer wall of the push block, and the outer wall of the push block is provided with two abutting bevels.

[0009] Preferably, the twist drill body has a first chip removal spray hole, the outer wall of the push block is fixedly connected to a connecting rod, the outer wall of the connecting rod is fixedly connected to a sealing block, and the sealing block is used to seal the first chip removal spray hole.

[0010] Preferably, a liquid inlet frame is fixedly connected to the main body of the twist drill, a liquid inlet groove is provided inside the liquid inlet frame, a rotating ring is rotatably connected to the liquid inlet frame, and a liquid inlet is provided on the rotating ring.

[0011] Preferably, a first rotating sealing ring is fixedly connected to the rotating ring, and the outer wall of the first rotating sealing ring is in close contact with the inner wall of the liquid inlet groove.

[0012] Preferably, a rotating frame is fixedly connected to the end of the mounting shaft, a fixed cylinder is fixedly connected to the inner wall of the rotating frame, a threaded rod is threadedly connected to the inner wall of the fixed cylinder, and a rotating block is fixedly connected to the end of the threaded rod.

[0013] Preferably, a plurality of first clamping blocks are slidably connected to the inner wall of the rotating block, and a first torsion cylinder is rotatably mounted on the outer wall of the rotating frame, with the plurality of first clamping blocks slidably connected to the inner wall of the first torsion cylinder.

[0014] Preferably, the outer wall of the first twisting cylinder is rotatably fitted with a second twisting cylinder, the outer wall of the first clamping block is fixedly connected with a second clamping block, the end of the twist drill body is fixedly connected with an installation rod, the installation rod is provided with a plurality of limiting grooves, and the outer contour of the second clamping block matches the inner contour of the limiting groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the eccentric spray pipe is eccentrically fixed to the rotating cylinder and is in an inclined state. When the eccentric spray pipe sprays high-pressure coolant, it will be subject to an outward acceleration, which causes the eccentric spray pipe to be subjected to a reaction force of equal magnitude and opposite direction. The eccentric spray pipe, which is both inclined and eccentric, uses the spray reaction force to generate a rotational torque, causing the eccentric spray pipe to carry the rotating cylinder to rotate along the rotation point with the second hollow rotating ball. During the rotation, the eccentric spray pipe, which rotates in a circular motion, sprays coolant in a circular trajectory outward, which can disrupt the stable state of the chips and weaken the frictional locking effect between the chips, thereby flushing away the chips and completing the unblocking.

[0016] 2. In this invention, when chip removal is performed after drilling, the twist drill is in a low-speed or stopped state. The return spring is controlled by controlling the output pressure of the external pressurizing pump. When the pressure of the coolant pushing against the guide block is small, the return spring will return, causing the second hollow rotating ball to rotate and reset. At this time, the rotating cylinder and the eccentric spray pipe also reset. Therefore, when the external high-pressure pump delivers high-pressure coolant, the second hollow rotating ball, the rotating cylinder, and the eccentric spray pipe rotate towards the chip removal direction to flush the chips. This is mainly used to assist in chip removal, discharging the chips transported to the middle section of the chip removal groove, and further weakening the frictional locking effect between the chips.

[0017] 3. In this invention, the sealing block remains in the state of sealing the first chip removal spray hole under the impact of coolant at normal pressure. When drilling into a deep hole, after the coolant is pressurized, the push block and the sealing block begin to move. The sealing block releases the seal on the first chip removal spray hole, and the coolant sprays out from the first chip removal spray hole. The coolant flushing force is continued in the middle section of the chip removal groove, which solves the problem that the coolant-assisted chip removal is easy to weaken in the middle section. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the second chip removal spray hole and its surrounding structure according to the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the second hollow rotating sphere and its surrounding structure according to the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the second hollow rotating sphere and its surrounding area according to the present invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the liquid inlet frame and its surrounding area according to the present invention; Figure 9 This is a schematic diagram of the cross-sectional structure of the first clamping block and its surrounding area according to the present invention; Figure 10 This is a schematic diagram of the rotating block and its surrounding cross-sectional structure according to the present invention.

[0019] In the attached diagram, the components represented by each number are as follows: 1. Mounting shaft; 2. Rotating frame; 3. First torsional drum; 4. Fixed cylinder; 5. Threaded rod; 6. Rotating block; 7. First clamping block; 8. Second clamping block; 9. Mounting rod; 10. Limiting groove; 11. Twist drill body; 12. Liquid inlet frame; 13. Liquid inlet groove; 14. Rotating ring; 15. First rotary sealing ring; 16. Liquid inlet; 17. Infusion tank; 18. Chip removal groove; 19. Second torsional drum; 20. 21. Sliding guide groove; 22. Guide ball; 23. Push block; 24. Abutting bevel; 25. Connecting rod; 26. Sealing block; 27. First chip removal spray hole; 28. Second chip removal spray hole; 29. ​​First hollow rotating ball; 30. Return spring; 31. Second hollow rotating ball; 32. Rotating cylinder; 33. Eccentric spray pipe; 34. Second rotating sealing ring; 35. O-ring; 36. Fixing ring; 37. Through groove. Detailed Implementation

[0020] 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.

[0021] This invention provides a technical solution: such as Figures 1-10The diagram shows a twist drill for deep hole machining, comprising a mounting shaft 1, a twist drill body 11, and a guide block 22. The twist drill body 11 has a chip removal groove 18 and a second chip removal spray hole 27. A first hollow rotating ball 28 and a second hollow rotating ball 30 are rotatably mounted on the inner wall of the second chip removal spray hole 27. Two O-rings 34 are fixedly connected to the inner wall of the second chip removal spray hole 27, and their inner walls are tightly fitted to the outer walls of the second hollow rotating ball 30 and the first hollow rotating ball 28, respectively. Both the first hollow rotating ball 28 and the second hollow rotating ball 30 have through grooves 36. A retaining ring 35 is fixedly connected to both the first hollow rotating ball 28 and the second hollow rotating ball 30. A return spring 29 is fixedly connected to the outer wall of the retaining ring 35 corresponding to the second hollow rotating ball 30, and the other end of the return spring 29 is fixedly connected to the outer wall of the retaining ring 35 corresponding to the first hollow rotating ball 28.

[0022] The outer walls of the first hollow rotating ball 28 and the second hollow rotating ball 30 are both rotatably connected to a rotating cylinder 31. An eccentric injection pipe 32 is eccentrically fixed to the outer wall of the rotating cylinder 31. Since the eccentric injection pipe 32 is eccentrically fixed to the rotating cylinder 31 and is in an inclined state, when the eccentric injection pipe 32 sprays out high-pressure coolant, it will be subjected to an outward acceleration effect, so that the eccentric injection pipe 32 is subjected to a reaction force of equal magnitude and opposite direction. The eccentric injection pipe 32, which is both inclined and eccentrically set, generates a rotational torque by using the spray reaction force, so that the eccentric injection pipe 32 carries the rotating cylinder 31 to rotate along the rotation point with the second hollow rotating ball 30.

[0023] A second rotary sealing ring 33 is fixedly connected to the first hollow rotating ball 28 and the second hollow rotating ball 30. The rotational connection between the rotating cylinder 31 and the first hollow rotating ball 28 and the second hollow rotating ball 30 is protected by the sealing of the second rotary sealing ring 33. The second rotary sealing ring 33 is made of NBR (nitrile rubber) and has good wear resistance.

[0024] The inside of the twist drill body 11 is provided with an infusion tank 17. The inner wall of the infusion tank 17 is provided with two sliding guide grooves 20. The inner wall of the sliding guide groove 20 is slidably installed with guide balls 21. The guide balls 21 are rotatably installed on the outer wall of the push block 22. The outer wall of the push block 22 is provided with two abutting bevels 23.

[0025] The twist drill body 11 has a first chip removal spray hole 26. A connecting rod 24 is fixedly connected to the outer wall of the push block 22. A sealing block 25 is fixedly connected to the outer wall of the connecting rod 24. The sealing block 25 is used to block the first chip removal spray hole 26. The sealing block 25 maintains the state of blocking the first chip removal spray hole 26 under the impact of coolant at normal pressure. When drilling into a deep hole, after the coolant is pressurized, the push block 22 and the sealing block 25 begin to move. The sealing block 25 releases the blockage of the first chip removal spray hole 26, and the coolant sprays out from the first chip removal spray hole 26. The coolant flushing force continues in the middle section of the chip removal groove 18.

[0026] A liquid inlet frame 12 is fixedly connected to the main body 11 of the twist drill. A liquid inlet groove 13 is opened inside the liquid inlet frame 12. A rotating ring 14 is rotatably connected to the liquid inlet frame 12. A liquid inlet 16 is opened on the rotating ring 14.

[0027] A first rotary sealing ring 15 is fixedly connected to the rotating ring 14, and the outer wall of the first rotary sealing ring 15 is in close contact with the inner wall of the liquid inlet groove 13.

[0028] A rotating frame 2 is fixedly connected to the end of the mounting shaft 1. A fixed cylinder 4 is fixedly connected to the inner wall of the rotating frame 2. A threaded rod 5 is threadedly connected to the inner wall of the fixed cylinder 4. A rotating block 6 is fixedly connected to the end of the threaded rod 5.

[0029] Multiple first clamping blocks 7 are slidably connected to the inner wall of the rotating block 6, and a first torsion cylinder 3 is rotatably installed on the outer wall of the rotating frame 2. Multiple first clamping blocks 7 are slidably connected to the inner wall of the first torsion cylinder 3.

[0030] The outer wall of the first twisting drum 3 is rotatably fitted with the second twisting drum 19. The outer wall of the first clamping block 7 is fixedly connected with the second clamping block 8. The end of the twist drill body 11 is fixedly connected with the mounting rod 9. The mounting rod 9 is provided with multiple limiting grooves 10. The outer contour of the second clamping block 8 matches the inner contour of the limiting groove 10.

[0031] Working principle: First, when assembling the twist drill body 11 for tool changing, the mounting rod 9 corresponding to the twist drill body 11 is inserted between multiple first clamping blocks 7. Then, one hand holds the second twisting drum 19, and the other hand rotates the first twisting drum 3. When the first twisting drum 3 rotates, it causes multiple first clamping blocks 7 to rotate. When the first clamping blocks 7 rotate, it causes the rotating block 6, which is slidably connected to the outer wall, to rotate. When the rotating block 6 rotates, it causes the threaded rod 5 to move spirally along the fixed cylinder 4 in the direction of moving closer to the twist drill body 11. At this time, the rotating block 6 moves forward and pushes multiple first clamping blocks 7, so that the outer wall of multiple first clamping blocks 7 abuts against the inner wall of the second twisting drum 19. The inner wall of the second twisting drum 19 is an inclined surface. The abutment causes multiple first clamping blocks 7 to simultaneously clamp the mounting rod 9 in a concentric direction. The second clamping block 8 on the outer wall of the first clamping block 7 is inserted into the limiting groove 10 to limit the front and rear position of the mounting rod 9. The installation is completed.

[0032] This invention operates in two modes. First, during high-speed drilling, the external pressurized pump output pipe draws coolant and connects it to the inlet 16. The pressurized coolant is then delivered into the inlet tank 13. As the twist drill body 11 rotates at high speed, the inlet frame 12 rotates accordingly. The inlet 16, the external coolant pipe, and the rotating ring 14 rotate relative to the inlet frame 12. During this relative rotation, the first rotating sealing ring 15 ensures the sealing of the rotating joint. The first rotating sealing ring 15 is made of NBR (nitrile butadiene rubber). It has good wear resistance. After the coolant enters the inlet groove 13 in the inlet frame 12, it enters the delivery groove 17 along the inlet groove 13, and then enters the through groove 36 along the delivery groove 17. It then enters the first hollow rotating ball 28 and the second hollow rotating ball 30 along the through groove 36. Then, it is transported by the first hollow rotating ball 28 and the second hollow rotating ball 30 into the corresponding rotating cylinder 31. Finally, it is sprayed out by the eccentric spray pipe 32. The spray position of the eccentric spray pipe 32 is at the deepest end of the chip removal groove 18, which can spray cooling and assist chip removal at the deepest part of the borehole at this time.

[0033] Secondly, the second mode of the present invention is performed during chip removal after drilling is completed. At this time, the twist drill is in a low-speed or stopped state. After the high-pressure coolant continues to flow into the first hollow rotating ball 28 and the second hollow rotating ball 30, the coolant in the first hollow rotating ball 28 and the second hollow rotating ball 30 continues to be transported to the rotating cylinder 31, and finally sprayed out by the eccentric injection pipe 32. When the eccentric injection pipe 32 sprays out, since the eccentric injection pipe 32 is eccentrically fixed to the rotating cylinder 31 and is in an inclined state, the eccentric injection pipe 32 will be subject to an outward acceleration when spraying high-pressure coolant, so that the eccentric injection pipe 32 is subject to a reaction force of equal magnitude and opposite direction. The eccentric spray pipe 32, which is both inclined and eccentrically positioned, generates a rotational torque using the jet reaction force. This causes the eccentric spray pipe 32 to carry the rotating cylinder 31 to rotate along the rotation point of the first hollow rotating ball 28 and the second hollow rotating ball 30. During the rotation, the rotational connection point between the rotating cylinder 31 and the second hollow rotating ball 30 is protected by the second rotating sealing ring 33. The second rotating sealing ring 33 is made of NBR (nitrile rubber), which has good wear resistance. At this time, the eccentric spray pipe 32, which rotates in a circular motion, sprays coolant in a circular trajectory outward, which can disrupt the stable state of chip accumulation and weaken the frictional locking effect between chips, thereby flushing away the chips and completing the unblocking.

[0034] During the high-pressure coolant delivery process within the infusion tank 17, the coolant will scour the outer wall of the push-pull block 22. It is important to note that there is a certain space between the upper surface of the push-pull block 22 and the inner wall of the infusion tank 17 for the coolant to pass through. As the coolant pushes the push-pull block 22, it moves along the inner wall of the sliding guide groove 20, carrying two guide balls 21. This movement causes the abutting inclined edge 23 of its outer wall to abut against the outer walls of the return spring 29, the second hollow rotating ball 30, and the first hollow rotating ball 28. The hypotenuse 23 abuts against the outer walls of the second hollow rotating ball 30 and the first hollow rotating ball 28, generating a tangential force that causes the second hollow rotating ball 30 and the first hollow rotating ball 28 to rotate. On the other hand, the abutment causes the return spring 29 to deform and pull on the second hollow rotating ball 30 and the first hollow rotating ball 28, further causing them to rotate. It should be noted that because the outer contours of the first hollow rotating ball 28 and the second hollow rotating ball 30 are spherical, therefore, the first hollow rotating ball 28... 8. When the second hollow rotating ball 30 rotates to any angle, its outer wall will remain tightly against the O-ring 34. When the second hollow rotating ball 30 and the first hollow rotating ball 28 rotate simultaneously, the return spring 29 will be stretched and tightened. The rotation of the first hollow rotating ball 28 and the second hollow rotating ball 30 causes the rotating cylinder 31 and the eccentric injection pipe 32 to rotate simultaneously. At this time, the spray direction of the eccentric injection pipe 32 is changed. The rebound of the return spring 29 can be controlled by controlling the output pressure of the external pressure pump. When the coolant pushes against... When the pressure of the guide block 22 is low, the return spring 29 will rebound, causing the second hollow rotating ball 30 to rotate and reset. At this time, the rotating cylinder 31 and the eccentric spray pipe 32 will also reset. Therefore, when the external high-pressure pump delivers high-pressure coolant, the second hollow rotating ball 30, the rotating cylinder 31, and the eccentric spray pipe 32 rotate in the direction of chip removal to flush the coolant, mainly to assist in chip removal. When delivering coolant at normal pressure, the second hollow rotating ball 30, the rotating cylinder 31, and the eccentric spray pipe 32 flush the coolant in the horizontal direction, mainly for cooling.

[0035] In the initial stage of drilling, coolant under normal pressure can be used. During deep hole machining, the delivery pressure of the booster pump is increased to assist in chip removal. The coolant is precisely flushed in the chip removal direction, further disrupting the stable state of chip accumulation and weakening the frictional locking effect between chips. The movement of the pusher block 22 moves the connecting rod 24 and the sealing block 25 synchronously. It should be noted that the sealing block 25 remains in the state of blocking the first chip removal spray hole 26 under the impact of coolant under normal pressure. When drilling into a deep hole, after the coolant is pressurized, the pusher block 22 and the sealing block 25 begin to move. The sealing block 25 releases the blockage of the first chip removal spray hole 26, and the coolant sprays out from the first chip removal spray hole 26. The coolant flushing force continues in the middle section of the chip removal groove 18, further discharging the chips transported to the middle section of the chip removal groove 18.

Claims

1. A twist drill tool for deep hole machining, comprising a mounting shaft (1), a twist drill body (11), and a guide block (22), characterized in that: The twist drill body (11) is provided with a chip removal groove (18), and the twist drill body (11) is provided with a second chip removal spray hole (27). A first hollow rotating ball (28) and a second hollow rotating ball (30) are rotatably installed on the inner wall of the second chip removal spray hole (27). Two O-rings (34) are fixedly connected to the inner wall of the second chip removal spray hole (27). The inner walls of the two O-rings (34) are respectively connected to the second hollow rotating ball (30) and the first hollow rotating ball (28). 8) The outer walls are tightly fitted. The first hollow rotating ball (28) and the second hollow rotating ball (30) are both provided with through grooves (36). The first hollow rotating ball (28) and the second hollow rotating ball (30) are both fixedly connected with fixing rings (35). The outer wall of the fixing ring (35) corresponding to the second hollow rotating ball (30) is fixedly connected with a return spring (29). The other end of the return spring (29) is fixedly connected to the outer wall of the fixing ring (35) corresponding to the first hollow rotating ball (28). The outer walls of the first hollow rotating ball (28) and the second hollow rotating ball (30) are rotatably connected to a rotating cylinder (31), and the outer wall of the rotating cylinder (31) is eccentrically fixedly connected to an eccentric injection pipe (32).

2. A twist drill tool for deep hole machining according to claim 1, characterized in that: A second rotating sealing ring (33) is fixedly connected to the first hollow rotating ball (28) and the second hollow rotating ball (30).

3. A twist drill tool for deep hole machining according to claim 1, characterized in that: The inside of the twist drill body (11) is provided with an infusion tank (17). The inner wall of the infusion tank (17) is provided with two sliding guide grooves (20). The inner wall of the sliding guide groove (20) is slidably installed with a guide ball (21). The guide ball (21) is rotatably installed on the outer wall of the push block (22). The outer wall of the push block (22) is provided with two abutting bevels (23).

4. A twist drill tool for deep hole machining according to claim 1, characterized in that: The twist drill body (11) is provided with a first chip removal spray hole (26). A connecting rod (24) is fixedly connected to the outer wall of the push guide block (22). A sealing block (25) is fixedly connected to the outer wall of the connecting rod (24). The sealing block (25) is used to seal the first chip removal spray hole (26).

5. A twist drill tool for deep hole machining according to claim 1, characterized in that: A liquid inlet frame (12) is fixedly connected to the main body (11) of the twist drill. A liquid inlet groove (13) is provided inside the liquid inlet frame (12). A rotating ring (14) is rotatably connected to the liquid inlet frame (12). A liquid inlet (16) is provided on the rotating ring (14).

6. A twist drill tool for deep hole machining according to claim 5, characterized in that: A first rotating sealing ring (15) is fixedly connected to the rotating ring (14), and the outer wall of the first rotating sealing ring (15) is in close contact with the inner wall of the liquid inlet groove (13).

7. A twist drill tool for deep hole machining according to claim 1, characterized in that: The end of the mounting shaft (1) is fixedly connected to a rotating frame (2), the inner wall of the rotating frame (2) is fixedly connected to a fixed cylinder (4), the inner wall of the fixed cylinder (4) is threadedly connected to a threaded rod (5), and the end of the threaded rod (5) is fixedly connected to a rotating block (6).

8. A twist drill tool for deep hole machining according to claim 7, characterized in that: The inner wall of the rotating block (6) is slidably connected with a plurality of first clamping blocks (7), and the outer wall of the rotating frame (2) is rotatably mounted with a first torsion cylinder (3), and the plurality of first clamping blocks (7) are slidably connected to the inner wall of the first torsion cylinder (3).

9. A twist drill tool for deep hole machining according to claim 8, characterized in that: The outer wall of the first twisting cylinder (3) is rotatably fitted with a second twisting cylinder (19), the outer wall of the first clamping block (7) is fixedly connected with a second clamping block (8), the end of the twist drill body (11) is fixedly connected with an installation rod (9), the installation rod (9) is provided with multiple limiting grooves (10), and the outer contour of the second clamping block (8) matches the inner contour of the limiting groove (10).

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