Deep hole drilling device for titanium alloy long pipe body and operation method

Abstract

The invention discloses a deep hole drilling device for a titanium alloy long pipe body, which comprises a machine tool main body, a chuck, a driving box body and the like, a deep hole drill bit is axially and movably arranged in the driving box body, a rotating main shaft and the chuck are horizontally and slidably arranged on a base, and a cavity for penetrating through and radially limiting a cylinder to be processed into the pipe body is arranged in the driving box body. According to the deep hole drilling device, the position of the deep hole drill bit is kept fixed, the cylinder to be drilled moves relative to the deep hole drill bit and is arranged on the deep hole drill bit in a sleeving mode, and the problem that at present, due to the fact that the length of the deep hole drill bit stretching out of the outer side of the driving box body is gradually increased, under the influence of the gravity and drilling resistance of the deep hole drill bit, the cylinder to be drilled is damaged can be effectively solved. And a deep hole drill bit is extremely easy to deflect to cause deflection of a drill hole. On the basis that the drilling straightness is guaranteed, the length of the cylinder to be drilled can be further increased, the number of pipe body short sections and the connecting number of adjacent pipe openings can be effectively reduced in later pipeline connection, and the leakage hidden danger is reduced.

Description

Technical Field

[0001] This invention relates to the field of machining and forming technology for long tubes, and in particular to a deep hole drilling device and operating method for titanium alloy long tubes. Background Technology

[0002] Long metal tubes are widely used in various fields such as construction, transportation, and energy. In construction, they are commonly used for support and connection components in building structures, such as bridges and large stadiums, where their high strength and excellent stability ensure the overall safety of the building. In transportation, such as railways, highways, and urban rail transit, long metal tubes are frequently used to manufacture guardrails, tunnel support structures, and bridge components. They can withstand enormous pressure and tension, ensuring the stability and safety of transportation facilities. In the energy sector, such as the oil and gas industries, long metal tubes are used to transport fluids and gases, and their corrosion resistance and sealing properties ensure the safety and efficiency of the transportation process.

[0003] Titanium pipes are highly favored for their high strength, low density, excellent corrosion resistance, and biocompatibility, making them widely applicable in long tubular structures, such as in marine engineering. In marine engineering, the corrosion resistance of titanium pipes makes them the preferred material for marine equipment. They can withstand the erosion of harsh environments such as seawater and salt spray, ensuring the stability and safety of marine equipment. Due to their excellent corrosion resistance, titanium pipes are also widely used in the chemical industry.

[0004] Currently, the fabrication and processing of long tubes involves rolling sheet metal and welding it into shape, primarily for energy transmission. However, for applications requiring higher sealing and pressure resistance, deep-hole drilling is typically used to process metal cylinders. Long tubes manufactured in this way have no weld seams, further ensuring sealing performance, and also offer higher pressure resistance, making them suitable for applications such as in the deep sea. Currently available equipment (devices) for deep hole drilling of long cylinders include: Figure 1 As shown, the machine tool (lathe) includes a main body with a base. A chuck with a rotating spindle is sequentially mounted on the base. A drive housing and a chip removal housing for mounting deep-hole drill bits are spaced apart on one side of the chuck. The deep-hole drill bit is axially moved within the drive housing. The current machining process is as follows: a long cylindrical section passes through the rotating spindle (which has a central hole structure) and the chuck, and is rotated by the chuck. Meanwhile, the deep-hole drill bit in the drive housing on the other side is driven to move axially and contact the end of the cylindrical section for axial drilling. Once the drill bit extends from the other side of the cylindrical section, the deep-hole machining is complete. The chip removal housing uses negative pressure to remove the waste chips continuously generated during the drilling process.

[0005] Currently, in deep hole drilling, the drill bit is driven into the cylinder by a long drive rod at its tail end. Therefore, as the drilling depth increases, the length of the drill bit extending beyond the drive housing gradually increases. Since the drill bit is located inside the cylinder, such as... Figure 4 As shown, the deep hole drill bit cannot be effectively supported by the drive housing, causing its drive rod to move as follows after being subjected to the downward gravity of the drill bit and the resistance inside the cylinder. Figure 6 The bending shown leads to a skewed drilling path for deep hole drill bits, increasing the straightness error of the deep hole within the cylinder, which in turn affects its later application. The longer the cylinder, the greater the impact, meaning a larger straightness error in the central hole within the formed tube. This limits the current processing length of long tubes. In long-distance tube laying, the number of short sections is large, increasing the number of connections between adjacent pipe openings. This not only increases operating costs but also increases the risk of leakage due to the increased number of connecting pipe openings. Summary of the Invention

[0006] To address the aforementioned problems, this invention aims to provide a deep hole drilling device and operating method for titanium alloy long tubes. By changing the drilling method, this application can further increase the length of the column to be drilled while ensuring the straightness of the drilling. In the subsequent pipeline connection, it can effectively reduce the number of short pipe sections and the number of connections between adjacent pipe openings, and reduce the risk of leakage.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a deep hole drilling device for titanium alloy long tubes, the deep hole drilling device comprising a machine tool body, the machine tool body having a base, a chuck with a rotating spindle being arranged sequentially on the base, a drive housing and a chip removal housing for mounting deep hole drill bits being arranged at intervals on one side of the chuck, the deep hole drill bits being axially movable in the drive housing, the drive housing being fixedly mounted on the base, while the rotating spindle and the chuck being horizontally slidably mounted on the base, and a cavity for a column to be processed into a tube being provided in the drive housing.

[0008] Preferably, guide balls that roll in contact with the column are evenly distributed on the side wall of the cavity.

[0009] Preferably, an embedding groove is provided on the side wall near the outer end of the deep hole drill bit along the circumferential spacing, and a support block that can be fully embedded in the embedding groove is hinged in each embedding groove facing the direction of travel of the column, and each support block abuts against the inner wall of the cavity when it is radially perpendicular to the deep hole drill bit.

[0010] Preferably, the chuck is provided with multiple jaws spaced circumferentially, and each jaw has a roller that rolls axially along the column on the surface where it contacts the column.

[0011] Preferably, a push rod is provided on the base at the tail side of the rotating spindle, which contacts the tail end of the column and drives the column to be processed into a tube to move axially relative to the chuck and the deep hole drill bit.

[0012] A method for operating a deep hole drilling device with a long titanium alloy tube includes the following steps: S1. Pass the column to be drilled through the rotating spindle and chuck, and hold it by the jaws of the chuck, while the roller abuts against the circumferential surface of the column to be processed into a tube. S2. The rotating spindle drives the column to be processed into a tube to rotate, and at the same time, under the axial push of the push rod, the column moves axially relative to the chuck and comes into contact with the deep hole drill bit. S3. Under the continuous pushing action of the push rod, the column is continuously sleeved on the deep hole drill bit and enters the cavity until the deep hole drill bit extends out from the other end of the column, completing the deep hole drilling of the column.

[0013] The beneficial effects of this invention are as follows: The deep hole drilling device disclosed in this application effectively solves the problem that the deep hole drill bit is prone to deflection and borehole deviation due to the increasing length of the drill bit extending beyond the drive housing, under the influence of the drill bit's gravity and drilling resistance. This invention, while ensuring the straightness of the borehole, can further increase the length of the drilled column, effectively reducing the number of pipe sections and adjacent pipe connections in subsequent pipe connections, and lowering the risk of leakage. Attached Figure Description

[0014] Figure 1 This is a structural diagram of a current deep hole drilling equipment.

[0015] Figure 2 This is a diagram illustrating the structure of a deep hole drill bit.

[0016] Figure 3 for Figure 1 Enlarged view of the structure at point A in the middle.

[0017] Figure 4 Currently, deep hole drill bits are continuously inserted into the cylinder for drilling.

[0018] Figure 5 This diagram illustrates the structure of a column undergoing a primary drilling (top drawing) and a secondary reaming (bottom drawing).

[0019] Figure 6 This diagram illustrates how the drive rod of a deep hole drill bit, after extending a considerable length beyond the drive housing, causes the drilling hole to deviate due to gravity bending.

[0020] Figure 7This is a diagram illustrating the cavity structure into which the column extends within the drive housing and pipes of the present invention.

[0021] Figure 8 This is a diagram illustrating the guide sphere structure on the inner wall of the cavity of the present invention, which guides the sliding of the column.

[0022] Figure 9 This diagram illustrates the structure of the present invention, in which a support block hinged to the deep hole drill bit is used to support and limit the deep hole drill bit before the end of the column makes its first contact with the drill bit.

[0023] Figure 10 This illustration shows the process of the support block being embedded into the groove of the deep hole drill bit as the column continuously enters the cavity.

[0024] Figure 11 This illustration shows the continuous support and guidance provided by the support ring slidably sleeved on the drive rod at the tail end of the deep hole drill bit according to the present invention.

[0025] Figure 12 This is a schematic diagram of the planar structure of the support ring of the present invention.

[0026] Figure 13 This diagram illustrates the deep hole drilling operation performed by attaching the chuck to the tail end of the column according to the present invention.

[0027] Figure 14 For the present invention in Figure 13 The diagram illustrates the process of drilling a hole by pushing the column into the cavity from the spindle housing.

[0028] Figure 15 This diagram illustrates the process of driving the column to roll and move using rollers on the chuck, as described in this invention.

[0029] Figure 16 This diagram illustrates the method of pushing the column by setting a push rod and a push cylinder at the tail end of the column according to the present invention.

[0030] Figure 17 The illustration shows the tilting motion caused by uneven end faces of the push cylinder or column in this invention.

[0031] Figure 18 This is a structural diagram illustrating the present invention in which the push cylinder is movably mounted at the end of the push rod.

[0032] Figure 19 This is a diagram illustrating the structure of a deep hole drill bit.

[0033] Figure 20 The diagram shows the structure of a deep hole drill bit.

[0034] Figure 21 This diagram illustrates the gradual extension of deep hole drill bits outside the drive housing.

[0035] Figure 22 This is a diagram of the support structure and pipe connection.

[0036] Figure 23 This is a diagram of the current rotating spindle and chuck structure.

[0037] In the diagram: 1-base; 2-spindle housing; 3-chuck; 31-jaw; 32-roller; 4-drive housing; 4a-cavity; 41-guide ball; 5-support body; 6-pipe; 7-chip removal housing; 9-deep hole drill bit; 91-tool; 9a-chip removal groove; 92-support bar; 9b-embedded groove; 93-support block; 94-drive rod; 10-support ring; 10a-chip removal port; 11-push rod; 12-push cylinder; 12a-blind hole; 13-column. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0039] See attached document Figures 1-23 The diagram shows a deep hole drilling device with a long titanium alloy tube body, which is as follows: Figure 1 The structure shown includes a machine tool body, which has a base 1. A chuck 3 with a rotating spindle is sequentially arranged on the base 1. A drive housing 4 for mounting a deep hole drill bit 9 and a chip removal housing 7 are spaced apart on one side of the chuck 3. The deep hole drill bit 9 is axially movable within the drive housing 4. Currently, during deep hole drilling operations, such as... Figure 1 As shown, the long column 13 passes through the rotating spindle (which has a central hole structure) and the chuck 3, and is rotated by the chuck 3. Meanwhile, the deep hole drill bit 9 in the drive housing 4 on the other side is driven to move axially and contact the end of the column 13 to perform axial drilling. After the deep hole drill bit 9 extends from the other side of the column 13, the complete deep hole machining is achieved.

[0040] The chip removal box 7 uses negative pressure to extract the waste chips continuously generated during drilling. The specific extraction operation is as follows: Figure 1As shown, a support body 5 is provided between the drive housing 4 and the chip removal housing 7, and adjacent support bodies 5 are connected by a pipe 6. The drive rod 94 at the tail end of the deep hole drill bit 9 passes through the connected pipe 6. During drilling, the column 13 is held by the chuck 3 and driven to rotate by the rotating spindle. At the same time, the end of the column 13 is brought close to the end of the drive housing 4. The chip removal housing 7 applies suction negative pressure in the connected pipe 6. The negative pressure gas passes through the gap between the deep hole drill bit 9 and the drive housing 4, and the gap between the drive rod 94 and the pipe 6, and uses negative pressure to adsorb the waste chips generated in the column 13 (the end faces of the column 13 and the drive housing 4 are close, and the waste chips generated in the column 13 can be drawn into the drive housing 4 and the pipe 6 by a large negative pressure). The waste chips are then continuously discharged through the tail end of the chip removal housing 7, avoiding the rotation obstruction of the deep hole drill bit 9 caused by the waste chips generated in the column 13, as well as the scratching problem caused to the inner wall of the column 13.

[0041] In actual drilling operations, two types of deep hole drill bits 9 (tools 91) are typically used. The first type is as follows: Figure 2 As shown in the attached diagram on the left, the cutting tool 91 is located at the end for forming the eyelet, while Figure 2 On the right side, the cutting tool 91 is mounted on the sidewall for secondary hole enlargement. A chip removal groove 9a is provided on the sidewall of the deep hole drill bit 9 to draw away drilling debris through negative pressure. Additionally, circumferential support strips 92 (made of nylon) are provided on the sidewall of the deep hole drill bit 9 to support the thinner tube after drilling, preventing it from bending.

[0042] To address the problem that current deep hole drilling devices, during deep hole machining, experience a gradual increase in the length of the deep hole drill bit 9 extending beyond the drive housing 4 due to the increasing drilling depth, leading to a decrease in the support force of the drill bit 9 and an increase in the straightness error of the drilling within the column 13, this application fixes the drive housing 4 on the base 1, while the rotating spindle and chuck 3 are horizontally slidably mounted on the base 1, and a cavity 4a with a through-hole and radially limiting tube is provided within the drive housing 4. Figure 7As shown, in this configuration, the deep hole drill bit 9 remains within the drive housing 4. The spindle housing 2, rotating the main spindle, slides axially on the base 1, driving the column 13 into the cavity 4a between the deep hole drill bit 9 and the drive housing 4. (Through the continuous, uniform movement of the rotating spindle, the column 13 gradually enters the cavity 4a, while the deep hole drill bit 9 continuously increases its drilling depth within the column 13.) This effectively solves the problem of the deep hole drill bit 9 easily deflecting due to its increasing length extending beyond the drive housing 4, causing drilling deviation under the influence of gravity and drilling resistance. Furthermore, this drilling method, while ensuring drilling straightness, can further increase the length of the column 13 to be drilled. This effectively reduces the number of pipe sections and adjacent pipe connections during subsequent pipe 6 connections, and lowers the risk of leakage.

[0043] To prevent the deep hole drill bit 9 and the column 13 entering the cavity 4a from radially deflecting within the cavity 4a, the outer wall of the column 13 needs to slide against the inner wall of the cavity 4a to achieve radial restraint on both the column 13 and the deep hole drill bit 9. However, this sliding contact between the column 13 and the inner wall of the cavity 4a increases the movement resistance of the column 13 and causes sliding wear on both the outer wall of the column 13 and the inner wall of the cavity 4a. Therefore, to solve this problem, such as Figure 8 As shown, guide balls 41 that roll in contact with the tube are evenly distributed on the side wall of the cavity 4a. The guide balls 41 are rolled into the inner wall of the cavity 4a. After the column 13 enters the cavity 4a, the outer wall of the column 13 makes rolling contact with the guide balls 41. Thus, during the axial movement of the column 13 during drilling, the contact of the guide balls 41 achieves radial limitation. At the same time, the rolling action reduces the contact friction with the movement of the column 13, which facilitates the smooth progress of deep hole machining.

[0044] When the end face of the column 13 first contacts the deep hole drill bit 9, the unevenness of the end face of the column 13 will cause the deep hole drill bit 9 to be radially deflected on the end face of the column 13, which will lead to the drill port not being coaxial with the column 13, and will also affect the subsequent drilling path. Therefore, to solve this problem, such as Figure 9-10 As shown, the deep hole drill bit 9 has circumferentially spaced insertion grooves 9b on the sidewall near its outer end. Within each insertion groove 9b, a support block 93 is hinged towards the direction of travel of the tube body and can be fully inserted into the groove. Each support block 93 abuts against the inner wall of the cavity 4a when radially perpendicular to the deep hole drill bit 9. Preferably, a torsion spring (not shown) is provided at the hinge of each support block 93 to drive it to be perpendicular to the surface of the deep hole drill bit 9. When the column 13 is not in contact with the deep hole drill bit 9, the force of the torsion spring causes each support block 93 to be vertical and abut against the inner wall of the cavity 4a, thereby achieving a radial limiting effect on the deep hole drill bit 9 (e.g., ...). Figure 9 (As shown in the diagram). After the column 13 travels and contacts the deep hole drill bit 9, the radial deviation of the deep hole drill bit 9 caused by the unevenness of the end face of the column 13 can be effectively overcome under the supporting and limiting action of the support block 93. When the column 13 continues to enter the cavity 4a, the end of the column 13 drives the support block 93 to rotate and overcome the force of the torsion spring, causing the support block 93 to be horizontally embedded in the embedding groove 9b, as shown. Figure 10 In the state shown, the support block 93 automatically removes its obstruction of the column 13, and the column 13 continues to enter the cavity 4a for drilling operations.

[0045] When the deep hole drill bit 9 penetrates into the column 13, it is only radially limited by the column 13. However, if the uniformity of the material structure within the column 13 leads to differences in strength at different locations, the deep hole drill bit 9 may deflect (the drill bit 9 tends to drill first into the softer parts of the column 13). Therefore, to solve this problem, such as... Figure 11 As shown, the tail end of the deep hole drill bit 9 also has a drive rod 94 (long rod) smaller than its outer diameter. A support ring 10 (its side surface is a planar structure and has a certain axial width to avoid deflection on the drive rod 94) is axially slidably sleeved on the drive rod 94. Before drilling, the support ring 10 is slid on the drive rod 94 to be close to the tail end of the deep hole drill bit 9. When the column 13 enters the cavity 4a, the end of the column 13 gradually abuts against the side wall of the support ring 10 and drives the support ring 10 to slide synchronously on the drive rod 94. During the sliding process, the support ring 10 always slides in contact with the inner wall of the cavity 4a, which realizes the radial limiting effect on the drive rod 94 and the deep hole drill bit 9, and solves the problem of the deep hole drill bit 9 deflecting in the column 13 due to the influence of uneven material in the column 13.

[0046] To reduce the sliding frictional resistance between the support ring 10 and the inner wall of the cavity 4a, preferably, a rounded chamfer structure (not shown in the figure) is provided on the side of the support ring 10 in the direction of travel. Compared with the right-angled corners of the support ring 10, this rounded chamfer can avoid the problem of contact obstruction caused by the unevenness of the inner wall surface of the cavity 4a, and realize the smooth sliding of the support ring 10.

[0047] Since the gap between the inner wall of cavity 4a and the deep hole drill bit 9 and drive rod 94 is used for negative pressure suction and removal of drill cuttings, in order to avoid the support ring 10 blocking the chip removal, such as Figure 12As shown, the support ring 10 has chip removal ports 10a spaced apart on its circumferential surface. Drill chips sucked in by negative pressure can be sucked out through these chip removal ports 10a. To avoid the support ring 10 rotating circumferentially on the drive rod 94 during movement and causing contact obstruction with the guide ball 41 on the inner wall of the cavity 4a, preferably, the support ring 10 and the drive rod 94 have a key and keyway fit structure, which limits the circumferential rotation of the support ring 10 and makes the chip removal ports 10a axially corresponding to the guide ball 41. Moreover, the chip removal ports 10a are larger than the guide ball 41, so that the support ring 10 can pass over the guide ball 41 through the chip removal ports 10a during axial movement, thus solving the contact interference problem between the two.

[0048] like Figure 1 As shown, the chuck 3 is provided with multiple jaws 31 at circumferential intervals. The multiple jaws 31 usually contact the surface of the column 13 and clamp the column 13. Then, through the rotation drive of the rotating spindle, the deep hole drill bit 9 performs deep hole rotation processing inside the column 13. Even though this application slides the rotary spindle on the base 1, and the column 13 can be driven into the cavity 4a for deep hole machining by the horizontal sliding of the rotary spindle and the chuck 3, the chuck 3 needs to be held at the tail end of the column 13 to feed the column 13 body (excluding the holding part) into the cavity 4a for drilling. This not only leaves most of the column 13 in a suspended state outside the chuck 3, which easily causes the column 13 to bend downwards due to gravity, affecting the smooth entry of the end of the column 13 into the cavity 4a for machining; but also, when the chuck 3 is close to the drive housing 4, the end of the column 13 held by the chuck 3 cannot be smoothly fed into the cavity 4a for machining. Therefore, to solve this problem, such as Figure 15 As shown, each claw 31 has a roller 32 that rolls along the axial direction of the tube body on its surface in contact with the tube body.

[0049] During operation, the chuck 3 can be brought close to the drive housing 4 (deep hole drill bit 9) and kept stationary (the chuck 3 and the housing of the rotating spindle can be controlled by a drive screw set on the base 1, which is not shown in the figure). The chuck 3 holding the end of the column 13 ensures the straightness of that part of the column 13. Then, the rotating spindle drives the column 13 to rotate, and then at the tail end of the column 13, the column 13 is driven by external mechanical force to move towards the cavity 4a under the rolling action of the roller 32. The surface of the roller 32 is preferably an arc structure that fits the surface of the column 13, which can ensure that the column 13 can still be driven by the rotating spindle to rotate while the column 13 is driven axially by external mechanical force. Under the action of external mechanical force, the part of the column 13 held by the chuck 3 can always maintain the straightness with the deep hole drill bit 9, thereby ensuring the straightness accuracy of the drilling. And to solve the problem that the chuck 3 is attached to the tail end of the column 13, causing most of the column 13 to be suspended in the air, resulting in the straightness of the drilling being affected by gravity and not being on the same axis as the deep hole drill bit 9.

[0050] When the tail end of the column 13 is mechanically pushed to the roller 32, because the end of the column 13 is still held by the chuck 31, the deep hole drill bit 9 cannot completely penetrate the column 13 due to the contact interference between the chuck 31 and the drive housing 4. Therefore, to solve this problem, such as Figure 16 As shown, a push rod 11 is provided on the base 1 at the tail side of the rotating spindle, which contacts the tail end of the tube and drives the tube to move axially relative to the chuck 3 and the deep hole drill bit 9. The end of the push rod 11 is as follows: Figure 18 The diagram shows a blind hole 12a for embedding a deep-hole drill bit 9. The drill bit 9 extends a certain length into the drive housing 4. Due to interference between the chuck 31 and the end face of the drive housing 4, the drill bit 9 can penetrate the column 13, achieving a complete drilling operation. Simultaneously, the push rod 11 abuts against the end of the column 13, creating a pushing effect. After the drill bit 9 exits the column 13, it can embed into the blind hole 12a at the end of the push rod 11, allowing the column 13 to be smoothly drilled through while being rotated by the chuck 31.

[0051] During the process of continuously pushing the column 13 into the cavity 4a, the push rod 11 has a length that is the same as or greater than that of the column 13. Therefore, due to the relatively long length of the main body, the push rod 11 may be axially deflected during the movement of the column 13 due to the straightness error of the main body, which may affect the straightness accuracy of the drilling. Therefore, to solve this problem, such as Figure 18 As shown, preferably, a push cylinder 12 is connected to the end of the push rod 11 via a rotating ball or universal joint. The blind hole 12a is formed in the push cylinder 12. During the pushing process by the push rod 11, the push cylinder 12 can rotate relative to the end face of the column 13, so that the end face of the push cylinder 12 can be tightly attached to the end face of the column 13. The column 13 is limited by the guide ball 41 in the cavity 4a, which solves the problem of pushing the column 13 with deviation due to the straightness error of the push rod 11, and further improves the straightness accuracy of the drilling of the column 13. Since the column 13 rotates continuously during the drilling process driven by the spindle, the push cylinder 12 and the push rod 11 are rotatably connected by a ball or universal joint. The push rod 11 is preferably driven by hydraulic power.

[0052] Based on the aforementioned deep hole drilling apparatus, this application also provides an operating method for a deep hole drilling apparatus with a titanium alloy long tube body, comprising the following steps: S1. The cylinder 13 to be drilled passes through the rotating spindle and chuck 3, and is clamped by the jaws 31 of the chuck 3, while the roller 32 abuts against the circumferential surface of the cylinder 13 to be processed into a tube. Before drilling begins, the jaws 31 are first applied to the cylinder 13 near its end to ensure that the end of the cylinder 13, which is close to the deep hole drill bit 9, remains straight.

[0053] S2. The rotating spindle drives the column 13 to be processed into a tube to rotate. The tail end of the column 13 is in contact with the push cylinder 12 provided at the end of the push rod 11. Under the hydraulic force, the push rod 11 is pushed. The push cylinder 12 pushes the column 13 to move towards the deep hole drill bit 9 while the roller 32 on the chuck 31 is rolling. The end of the column 13 then contacts the deep hole drill bit 9 to start the drilling operation.

[0054] S3. Under the continuous pushing action of the push rod 11, the drilling operation of the column 13 is carried out, and the column 13 gradually enters the cavity 4a of the drive box 4 and the subsequent pipe 6. When the end continues to drill to the other end of the column 13, since the deep hole drill bit 9 extends to a certain length of the drive box 4, under the push of the push rod 11, the deep hole drill bit 9 can extend from the other end of the column 13 and be embedded in the blind hole 12a of the push cylinder 12, thereby completing the deep hole drilling of the column 13.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A deep hole drilling device for a long titanium alloy tube, comprising a machine tool body, the machine tool body having a base, a chuck with a rotating spindle being sequentially arranged on the base, and a drive housing and a chip removal housing for mounting deep hole drill bits being arranged at intervals on one side of the chuck, the deep hole drill bits being axially movable within the drive housing, characterized in that: The drive housing is fixedly mounted on the base, while the rotating spindle and chuck are horizontally slidably mounted on the base, and a cavity is provided in the drive housing for a column to be processed into a tube, which is inserted through and radially limited.

2. The deep hole drilling device according to claim 1, characterized in that: Guide balls that roll into contact with the column are evenly distributed on the side wall of the cavity.

3. The deep hole drilling device according to claim 2, characterized in that: An embedding groove is provided on the side wall near the outer end of the deep hole drill bit along the circumferential spacing. In each embedding groove, a support block is hinged to the direction of travel of the column and can be completely embedded in the embedding groove. Each support block abuts against the inner wall of the cavity when it is radially perpendicular to the deep hole drill bit.

4. The deep hole drilling device according to claim 3, characterized in that: The chuck has multiple jaws spaced circumferentially, and each jaw has a roller that rolls axially along the column on the surface where it contacts the column.

5. The deep hole drilling apparatus according to claim 4, characterized in that: A push rod is provided on the base at the tail side of the rotating spindle, which contacts the tail end of the column and drives the column to be processed into a tube to move axially relative to the chuck and the deep hole drill bit.

6. The operating method of the deep hole drilling device for a long titanium alloy tube according to claim 1, characterized in that, Includes the following steps: S1. Pass the column to be drilled through the rotating spindle and chuck, and hold it by the jaws of the chuck, while the roller abuts against the circumferential surface of the column to be processed into a tube. S2. The rotating spindle drives the column to be processed into a tube to rotate, and at the same time, under the axial push of the push rod, the column moves axially relative to the chuck and comes into contact with the deep hole drill bit. S3. Under the continuous pushing action of the push rod, the column is continuously sleeved on the deep hole drill bit and enters the cavity until the deep hole drill bit extends out from the other end of the column, completing the deep hole drilling of the column.

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