Continuous drilling device and method for ultra-long and thin deep hole based on guide hole preprocessing

Abstract

The invention relates to the technical field of drilling machining of ultra-long and thin deep holes, and discloses an ultra-long and thin deep hole continuous drilling device and method based on guide hole preprocessing. The device comprises a deep hole drilling machine body, a sliding groove is formed in the upper inner wall of the deep hole drilling machine body, a mounting block is arranged in the sliding groove, and a drilling clamp is arranged on one side of the mounting block; a super-slender drill bit is clamped at one end of the drilling clamp, a cooling chip removal device is mounted on one side of the mounting block, and a high-pressure cooling liquid nozzle is arranged at one end of the cooling chip removal device, so that the super-slender drill bit is not prone to breakage in the drilling process; the high-pressure cooling liquid can effectively scour and take out cuttings, accumulation of the cuttings in a machining area is avoided, continuity of the machining process is guaranteed, machining efficiency is improved, meanwhile, the guide hole drilled through the guide drill bit provides accurate guidance for the ultra-slender drill bit, deflection of the drill bit in the drilling process is effectively avoided, and accuracy is improved.

Description

Technical Field

[0001] This invention relates to the field of drilling technology for ultra-slender and deep holes, and in particular to a continuous drilling apparatus and method for ultra-slender and deep holes based on pre-machining of guide holes. Background Technology

[0002] Machining ultra-long and thin deep holes has important applications in aerospace, medical devices, and other fields, such as cooling holes for aircraft engine blades and medical catheters. Currently, the machining of ultra-long and thin deep holes faces many challenges, including difficulty in ensuring machining accuracy, easy drill bit breakage, and difficulties in chip removal. With the development of industrial technology, the requirements for the machining accuracy and efficiency of ultra-long and thin deep holes are becoming increasingly higher, and traditional machining methods are no longer sufficient to meet the demands. In recent years, scholars at home and abroad have conducted extensive research on deep hole machining technology, but many technical bottlenecks still exist.

[0003] In existing technologies, the machining of ultra-long and thin deep holes mainly employs the following methods: First, segmented drilling, which achieves deep hole machining through multiple segmented drilling operations; however, this method easily produces tool marks, affecting machining quality. Second, gun drilling, which utilizes high-pressure coolant to assist in chip removal; however, gun drilling equipment is expensive and requires extremely high rigidity and guiding properties of the drill bit. Third, electrical discharge machining (EDM), which machines deep holes through the principle of electrical erosion; however, it has low machining efficiency and is not suitable for materials with poor electrical conductivity. Each of these methods has its advantages and disadvantages, but none can completely solve the problems of precision and efficiency in machining ultra-long and thin deep holes.

[0004] Therefore, the present invention provides an apparatus and method for continuous drilling of ultra-slender long deep holes based on pre-machining of guide holes. Summary of the Invention

[0005] To overcome the shortcomings of the prior art and solve at least one of the problems mentioned in the background art, a continuous drilling device and method for ultra-slender long deep holes based on pre-machining of guide holes is proposed.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: This invention provides a continuous drilling device and method for ultra-slender deep holes based on pre-machining of guide holes, comprising a deep hole drilling machine body, a groove formed on the upper inner wall of the deep hole drilling machine body, a mounting block disposed inside the groove, a drilling chuck disposed on one side of the mounting block, an ultra-slender drill bit held at one end of the drilling chuck, a cooling and chip removal device disposed on one side of the mounting block, and a high-pressure device corresponding to the ultra-slender drill bit disposed at one end of the cooling and chip removal device. The deep hole drilling machine body includes a coolant nozzle. A second hydraulic cylinder is installed inside the body of the deep hole drilling machine. A telescopic column is inserted into one end of the second hydraulic cylinder. A guide drill bit mounting block is located at the lower end of the telescopic column. A guide drill bit clamp is installed at one end of the guide drill bit mounting block, and one end of the guide drill bit clamps the guide drill bit. A chip removal groove is formed on the lower inner wall of the deep hole drilling machine body. A first hydraulic cylinder is installed inside one end of the chip removal groove. A telescopic rod is inserted into one end of the first hydraulic cylinder, and one end of the telescopic rod has a sliding base. The sliding base has a fixed base at its upper end. Fixed side plates are located at both ends of the upper surface of the fixed base. Movable grooves are formed on both sides of the upper surface of the fixed base. Fixed plates are slidably connected inside the movable grooves. The workpiece body is clamped between the fixed plates. Fixed screws are threaded to both ends of the fixed side plates. One end of each fixed screw penetrates the interior of the fixed side plate, and the other end is rotatably connected to one side of the fixed plate. A control panel is installed on one side of the deep hole drilling machine body. This design makes the ultra-slender drill bit less prone to breakage during drilling, extending its service life. The high-pressure coolant nozzle and chip removal groove work together, allowing the high-pressure coolant to effectively flush and carry away the chips, which are then smoothly discharged through the chip removal groove, preventing chip accumulation in the processing area, ensuring the continuity of the processing process, and improving processing efficiency. Simultaneously, the guide hole drilled by the guide drill bit provides precise guidance for the ultra-slender drill bit, effectively preventing the drill bit from deviating during drilling and improving accuracy.

[0007] Preferably, a lead screw motor is installed inside the slide groove. One end of the lead screw motor is provided with a main lead screw. The outer surface of the main lead screw is threaded with a second movable block. The lower end of the second movable block is provided with a mounting block. Under the action of the lead screw motor, the second movable block can move on the outer surface of the main lead screw, which facilitates stable and uniform speed driving of the mounting block to move, ensuring work quality.

[0008] Preferably, the upper end of the second movable block is provided with a limiting slider, and the inside of the groove is provided with a limiting slide rod. The limiting slide rod is slidably connected to the outer surface of the limiting slide rod. By sliding the limiting slider on the outer surface of the limiting slide rod, the movement of the second movable block is limited, making its operation more stable, ensuring that the ultra-thin drill bit does not shake when moving, and improving the working quality of drilling.

[0009] Preferably, a first lead screw motor is installed on both sides of the first lead screw motor. A first transmission disk is provided at one end of the first lead screw motor. A transmission belt is wound around the outer surface of one end of the first transmission disk. A second transmission disk is provided at one end of the transmission belt. A lead screw is provided at one end of the second transmission disk. A first moving block is threadedly connected to the outer surface of the lead screw. A limit plate is provided at the lower end of the first moving block. The limit plate has a limit hole inside that corresponds to the ultra-thin drill bit. Under the action of the first lead screw motor, the transmission belt drives the lead screw to rotate, which in turn drives the limit plate to move, facilitating the distance between it and the high-pressure coolant nozzle. This ensures that the limit hole can effectively limit the ultra-thin drill bit and guarantee the quality of drilling.

[0010] Preferably, the upper end of the moving block one is provided with a limiting slider two, which is slidably connected to the outer surface of the limiting slider one. Under the action of the limiting slider one, the movement of the moving block one is limited, making its operation more stable, improving the stability of the device, and ensuring the accuracy during drilling.

[0011] Preferably, the two ends of the sliding base are slidably connected to the limiting slide rods. The two ends of the limiting slide rods are located inside the chip removal groove. Under the action of the limiting slide rods, the stability of the sliding base during movement can be improved, and it can be prevented from shaking during movement, which would affect the drilling work.

[0012] Preferably, the chip discharge trough has a collection slope inside, and a waste liquid collection chamber is formed at the bottom of the collection slope. The waste liquid collection chamber is equipped with a filter screen. Under the action of the filter screen, the waste liquid can be filtered and then collected inside the waste liquid collection chamber for convenient centralized treatment and improved environmental protection.

[0013] Preferably, a collection box is placed on the upper surface of the filter screen, which can collect the chips in a concentrated manner, thereby improving the efficiency and effectiveness of collection.

[0014] Preferably, the outer surface of the ultra-thin drill bit is coated with a titanium nitride coating, which has good hardness and wear resistance. It can significantly improve the surface hardness of the ultra-thin drill bit, reduce the coefficient of friction between it and the workpiece material, reduce wear, and extend the service life of the ultra-thin drill bit. At the same time, at high temperatures, it can form a dense alumina protective film, allowing the ultra-thin drill bit to maintain good wear resistance during high-speed cutting, reduce cutting temperature, reduce tool wear, and ensure stable operation of the ultra-thin drill bit in ultra-thin deep hole machining.

[0015] Preferably, the steps are as follows: Step 1: Place the workpiece body on the surface of the fixed base and fix it with the fixed plate. Start the second hydraulic cylinder to drive the guide drill bit downward. Then start the first hydraulic cylinder to drive the workpiece body closer to the guide drill bit, so that the guide drill bit drills a guide hole on its surface. After completion, return everything to its original position. Step 2: Start the lead screw motor to slowly bring the ultra-thin long drill bit close to the guide hole for deep hole machining. At the same time, the limiting plate also moves synchronously to limit the ultra-thin long drill bit and prevent it from deviating. Meanwhile, the high-pressure coolant nozzle sprays coolant to assist in chip removal and reduce the temperature of the ultra-thin long drill bit. Step 3: The discharged chips will fall to the collection slope and then slide into the collection mesh box for collection. The waste liquid will be collected in the waste liquid collection chamber after being filtered by the filter screen.

[0016] The beneficial effects of this invention are as follows: 1. The guide hole drilled by the guide drill bit provides precise guidance for the ultra-slender drill bit, effectively avoiding deviation of the drill bit during the drilling process and improving accuracy.

[0017] 2. The presence of the guide hole makes the ultra-slender drill bit more stable during drilling, reduces the swing and deviation of the ultra-slender drill bit, lowers the risk of breakage due to uneven stress, extends the service life of the ultra-slender drill bit, and reduces processing costs.

[0018] 3. With the combined action of the high-pressure coolant nozzle and the chip removal channel, the high-pressure coolant can effectively flush and carry away the chips, which are then smoothly discharged through the chip removal channel. This avoids the accumulation of chips in the processing area, ensures the continuity of the processing process, and improves processing efficiency. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the internal structure of the deep hole drilling machine in this invention; Figure 2 This is a side view of the deep hole drilling machine in this invention; Figure 3 This is a front structural diagram of the lead screw device in this invention; Figure 4 This is a front view of the hydraulic device in this invention. Figure 5 This is a schematic diagram of the planar structure of the guiding device in this invention; Figure 6 This is a schematic diagram of the internal structure of the collecting device in this invention.

[0021] Legend: 1. Deep hole drilling machine body; 2. Moving groove; 3. Fixing screw; 4. Fixing base; 5. Fixing plate; 6. Workpiece body; 7. Guide drill bit chuck; 8. Ultra-slender drill bit; 9. Limiting hole; 10. Drilling chuck; 11. High-pressure coolant nozzle; 12. Cooling and chip removal device; 13. Mounting block; 14. Control panel; 15. Chip removal groove; 16. Limiting plate; 17. Guide drill bit mounting block; 18. Slide groove; 19. Guide drill bit; 20. Transmission disc one; 21. 1. Lead screw motor 1; 22. Transmission belt; 23. Transmission disc 2; 24. Lead screw motor; 25. Limiting slider 1; 26. Limiting slide rod 1; 27. Limiting slider 2; 28. Moving block 1; 29. ​​Moving block 2; 30. Lead screw; 31. Hydraulic cylinder 1; 32. Telescopic rod; 33. Limiting slide rod 2; 34. Sliding base; 35. Hydraulic cylinder 2; 36. Telescopic column; 37. Collection net box; 38. Filter screen; 39. Waste liquid collection chamber; 40. Collection ramp. Detailed Implementation

[0022] 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.

[0023] Specific implementation examples are given below.

[0024] like Figure 1-6As shown, a continuous drilling device for ultra-slender deep holes based on pre-machining of guide holes includes a deep hole drilling machine body 1. A groove 18 is formed on the upper inner wall of the deep hole drilling machine body 1. A mounting block 13 is disposed inside the groove 18. A drilling chuck 10 is disposed on one side of the mounting block 13, and one end of the drilling chuck 10 holds an ultra-slender drill bit 8. A cooling and chip removal device 12 is mounted on one side of the mounting block 13. A high-pressure coolant nozzle 11 corresponding to the ultra-slender drill bit 8 is disposed at one end of the cooling and chip removal device 12. The interior of the deep hole drilling machine body 1... A hydraulic cylinder 35 is installed, with a telescopic column 36 inserted into one end. A guide drill bit mounting block 17 is located at the lower end of the telescopic column 36. A guide drill bit clamp 7 is installed at one end of the guide drill bit mounting block 17, and a guide drill bit 19 is held at one end of the clamp 7. A chip removal groove 15 is formed on the lower inner wall of the deep hole drilling machine body 1. A hydraulic cylinder 31 is installed inside one end of the chip removal groove 15. A telescopic rod 32 is inserted into one end of the hydraulic cylinder 31, and a sliding base 34 is located at one end of the telescopic rod 32. A fixed base 4 is provided at the upper end of the moving base 34. Fixed side plates are provided at both ends of the upper surface of the fixed base 4. Moving grooves 2 are opened on both sides of the upper surface of the fixed base 4. Fixed plates 5 are slidably connected inside the moving grooves 2. The workpiece body 6 is clamped between the fixed plates 5. Fixed screws 3 are threadedly connected to both ends of the fixed side plates. One end of the fixed screw 3 passes through the interior of the fixed side plate, and the other end of the fixed screw 3 is rotatably connected to one side of the fixed plate 5. A control panel 14 is installed on one side of the deep hole drilling machine body 1. Through the above design, the ultra-slender drill bit 8 is not easy to break during drilling, thus extending its service life. The high-pressure coolant nozzle 11 and the chip removal groove 15 cooperate with each other. The high-pressure coolant can effectively flush and carry out the chips, which are smoothly discharged through the chip removal groove 15, avoiding the accumulation of chips in the processing area, ensuring the continuity of the processing process, and improving processing efficiency. At the same time, the guide hole drilled by the guide drill bit 19 provides precise guidance for the ultra-slender drill bit 8, effectively avoiding the deviation of the drill bit during the drilling process and improving accuracy.

[0025] like Figure 3 As shown, a lead screw motor 24 is installed inside the slide groove 18. A main lead screw is provided at one end of the lead screw motor 24. A moving block 29 is threadedly connected to the outer surface of the main lead screw. A mounting block 13 is provided at the lower end of the moving block 29. Under the action of the lead screw motor 24, the moving block 29 can move on the outer surface of the main lead screw, so as to drive the mounting block 13 to move stably and uniformly, thus ensuring the quality of work.

[0026] like Figure 3As shown, a limiting slider 25 is provided at the upper end of the moving block 29, and a limiting rod 26 is provided inside the slide groove 18. The limiting rod 26 is slidably connected to the outer surface of the limiting rod 26. By sliding the limiting slider 25 on the outer surface of the limiting rod 26, the movement of the moving block 29 is limited, making its operation more stable and ensuring that the ultra-thin drill bit 8 does not shake when moving, thus improving the working quality of drilling.

[0027] like Figure 1-3 As shown, lead screw motor 24 has lead screw motor 1 21 installed on both sides. One end of lead screw motor 1 21 is provided with transmission disk 1 20. One end of transmission disk 1 20 is wound with transmission belt 22. One end of transmission belt 22 is provided with transmission disk 23. One end of transmission disk 23 is provided with lead screw 30. The outer surface of lead screw 30 is threadedly connected with moving block 1 28. The lower end of moving block 1 28 is provided with limit plate 16. The inside of limit plate 16 is provided with limit hole 9 corresponding to ultra-thin drill bit 8. Under the action of lead screw motor 1 21, transmission belt 22 drives lead screw 30 to rotate, which in turn drives limit plate 16 to move, so that the distance between it and high pressure coolant nozzle 11 can be adjusted. This ensures that limit hole 9 can play a good limiting role for ultra-thin drill bit 8 and ensure the quality of drilling.

[0028] like Figure 3 As shown, a limiting slider 27 is provided at the upper end of the moving block 28. The limiting slider 27 is slidably connected to the outer surface of the limiting slider 26. Under the action of the limiting slider 26, the movement of the moving block 28 is limited, making its operation more stable, improving the stability of the device, and ensuring the accuracy during drilling.

[0029] like Figure 4 As shown, the two ends of the sliding base 34 are internally connected to the limiting slide rod 33. The two ends of the limiting slide rod 33 are set inside the chip removal groove 15. Under the action of the limiting slide rod 33, the stability of the sliding base 34 during movement can be improved, and it can be prevented from shaking during movement, which would affect the drilling work.

[0030] like Figure 6 As shown, the chip discharge trough 15 has a collection incline 40 inside, and a waste liquid collection chamber 39 is provided at the bottom of the collection incline 40. A filter screen 38 is installed inside the waste liquid collection chamber 39. Under the action of the filter screen 38, the waste liquid can be filtered and then collected inside the waste liquid collection chamber 39 for convenient centralized treatment and improved environmental protection.

[0031] like Figure 6 As shown, a collection box 37 is placed on the upper surface of the filter screen 38. The collection box 37 can collect the chips in a concentrated manner, which improves the efficiency and effectiveness of collection.

[0032] like Figure 1-2 As shown, the outer surface of the ultra-slender drill bit 8 is coated with a titanium nitride coating, which has good hardness and wear resistance. It can significantly improve the surface hardness of the ultra-slender drill bit 8, reduce the coefficient of friction between it and the workpiece material, reduce wear, and extend the service life of the ultra-slender drill bit 8. At the same time, at high temperatures, it can form a dense alumina protective film, allowing the ultra-slender drill bit 8 to maintain good wear resistance during high-speed cutting, reduce cutting temperature, reduce tool wear, and ensure stable operation of the ultra-slender drill bit 8 in ultra-slender deep hole machining.

[0033] like Figure 1-6 As shown, the steps are as follows: Step 1: Place the workpiece body 6 on the surface of the fixed base 4 and fix it with the fixed plate 5. Start the hydraulic cylinder 2 35 to drive the guide drill bit 19 to move downward. Then start the hydraulic cylinder 1 31 to drive the workpiece body 6 close to the guide drill bit 19, so that the guide drill bit 19 drills a guide hole on its surface. After completion, return everything to its original position. Step 2: Start the lead screw motor 24 to slowly bring the ultra-thin long drill bit 8 close to the guide hole for deep hole machining. At the same time, the limit plate 16 also moves synchronously to limit the ultra-thin long drill bit 8 and prevent it from deviating. Meanwhile, the high-pressure coolant nozzle 11 sprays coolant to assist in chip removal and reduce the temperature of the ultra-thin long drill bit 8. Step 3: The discharged chips will fall to the collection angle 40 and then slide into the collection net box 37 for collection. The waste liquid is collected in the waste liquid collection chamber 39 after being filtered by the filter screen 38.

[0034] Working principle: During processing, the workpiece body 6 is placed on the surface of the fixed base 4 and fixed by the fixed plate 5. The hydraulic cylinder 2 35 is started to drive the guide drill bit 19 downward. Then, the hydraulic cylinder 1 31 is started to drive the workpiece body 6 closer to the guide drill bit 19, so that the guide drill bit 19 drills a guide hole on its surface. After completion, everything is returned to its original position. The lead screw motor 24 is started to make the ultra-thin long drill bit 8 slowly approach the guide hole. When it moves, it will pass through the inside of the limiting hole 9, and then perform deep hole processing on the workpiece body 6. At the same time, the limiting plate 16 also moves synchronously, constantly adjusting the distance between it and the high-pressure coolant nozzle 11 to limit the ultra-thin long drill bit 8 and prevent it from deviating. At the same time, the high-pressure coolant nozzle 11 sprays coolant to assist in chip removal and reduce the temperature of the ultra-thin long drill bit 8. The discharged chips will fall to the collection slope 40 and then slide into the collection screen box 37 for collection. The waste liquid is collected in the waste liquid collection chamber 39 after being filtered by the filter screen 38.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A continuous drilling device for ultra-slender deep holes based on pre-machining of guide holes, comprising a deep hole drilling machine body (1), characterized in that: The upper inner wall of the deep hole drilling machine body (1) is provided with a sliding groove (18). The sliding groove (18) is provided with a mounting block (13). A drilling chuck (10) is provided on one side of the mounting block (13). One end of the drilling chuck (10) holds an ultra-slender drill bit (8). A cooling chip removal device (12) is provided on one side of the mounting block (13). One end of the cooling chip removal device (12) is provided with a high-pressure coolant nozzle (11) corresponding to the ultra-slender drill bit (8). A hydraulic cylinder two (35) is installed inside the deep hole drilling machine body (1). A telescopic column (36) is inserted into one end of the hydraulic cylinder two (35). A guide drill bit mounting block (17) is provided at the lower end of the telescopic column (36). A guide drill bit chuck (7) is installed at one end of the guide drill bit mounting block (17). A guide drill bit chuck (7) is held at one end of the guide drill bit chuck (7). The deep hole drilling machine body (1) The inner wall of the deep hole drilling machine is provided with a chip removal groove (15). A hydraulic cylinder (31) is installed inside one end of the chip removal groove (15). A telescopic rod (32) is inserted into one end of the hydraulic cylinder (31). A sliding base (34) is provided at one end of the telescopic rod (32). A fixed base (4) is provided at the upper end of the sliding base (34). Fixed side plates are provided at both ends of the upper surface of the fixed base (4). Moving grooves (2) are provided on both sides of the upper surface of the fixed base (4). Fixed plates (5) are slidably connected inside the moving grooves (2). The workpiece body (6) is clamped between the fixed plates (5). Fixed screws (3) are threaded inside both ends of the fixed side plates. One end of the fixed screw (3) passes through the interior of the fixed side plate, and the other end of the fixed screw (3) is rotatably connected to one side of the fixed plate (5). A control panel (14) is installed on one side of the deep hole drilling machine body (1).

2. The continuous drilling device for ultra-slender long deep holes based on pre-machining of guide holes according to claim 1, characterized in that: The slide (18) is equipped with a lead screw motor (24), one end of which is provided with a main lead screw, and the outer surface of the main lead screw is threaded with a moving block two (29), and the lower end of the moving block two (29) is provided with an installation block (13).

3. The continuous drilling device for ultra-slender long deep holes based on pre-machining of guide holes according to claim 2, characterized in that: The upper end of the movable block 2 (29) is provided with a limiting slider 1 (25), and the inside of the slide groove (18) is provided with a limiting slider 1 (26). The limiting slider 1 (26) is slidably connected to the outer surface of the limiting slider 1 (26).

4. The continuous drilling device for ultra-slender long deep holes based on pre-machining of guide holes according to claim 2, characterized in that: The lead screw motor (24) is equipped with lead screw motor one (21) on both sides. One end of the lead screw motor one (21) is provided with a transmission disk one (20). One end of the transmission disk one (20) is wound with a transmission belt (22). One end of the transmission belt (22) is provided with a transmission disk two (23). One end of the transmission disk two (23) is provided with a lead screw (30). The outer surface of the lead screw (30) is threaded with a moving block one (28). The lower end of the moving block one (28) is provided with a limit plate (16). The inside of the limit plate (16) is provided with a limit hole (9) corresponding to the ultra-thin drill bit (8).

5. The continuous drilling device for ultra-slender long deep holes based on pre-machining of guide holes according to claim 4, characterized in that: The upper end of the moving block 1 (28) is provided with a limiting slider 2 (27), which is slidably connected to the outer surface of the limiting slider 1 (26).

6. The continuous drilling device for ultra-slender long deep holes based on pre-machining of guide holes according to claim 1, characterized in that: The sliding base (34) has two internally slidably connected limit slide rods (33), and the two ends of the limit slide rods (33) are located inside the chip removal groove (15).

7. The continuous drilling device for ultra-slender long deep holes based on pre-machining of guide holes according to claim 1, characterized in that: The chip removal groove (15) has a collection sloping section (40) inside, and a waste liquid collection chamber (39) is provided at the bottom of the collection sloping section (40). A filter screen (38) is provided inside the waste liquid collection chamber (39).

8. The continuous drilling device for ultra-slender long deep holes based on pre-machining of guide holes according to claim 7, characterized in that: A collection box (37) is placed on the upper surface of the filter screen (38).

9. The continuous drilling device for ultra-slender long deep holes based on pre-machining of guide holes according to claim 1, characterized in that: The outer surface of the ultra-slender drill bit (8) is coated with a titanium nitride coating.

10. A method for continuous drilling of ultra-slender, long, and deep holes based on pre-machining of guide holes, wherein the apparatus for continuous drilling of ultra-slender, long, and deep holes based on pre-machining of guide holes as described in any one of claims 1-9 is characterized in that, The steps are as follows: Step 1: Place the workpiece body (6) on the surface of the fixed base (4) and fix it with the fixed plate (5). Start the hydraulic cylinder 2 (35) to drive the guide drill bit (19) to move downward. Then start the hydraulic cylinder 1 (31) to drive the workpiece body (6) close to the guide drill bit (19) so that the guide drill bit (19) drills a guide hole on its surface. After completion, return everything to its original position. Step 2: Start the lead screw motor (24) to slowly bring the ultra-thin drill bit (8) close to the guide hole for deep hole machining. At the same time, the limiting plate (16) also moves synchronously to limit the ultra-thin drill bit (8) and prevent it from deviating. Meanwhile, the high-pressure coolant nozzle (11) sprays coolant to assist in chip removal and reduce the temperature of the ultra-thin drill bit (8). Step 3: The discharged chips will fall to the collection slope (40) and then slide into the collection net box (37) for collection. The waste liquid is collected in the waste liquid collection chamber (39) after being filtered by the filter screen (38).

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