A boring lathe for wear-resistant pipe

Abstract

The application relates to the technical field of lathe machining, and particularly discloses a boring lathe for wear-resistant pipes, which comprises a lathe bed, a chuck carrier is fixedly installed on the top surface of the lathe bed, a wear-resistant pipe is fixedly installed on the chuck carrier through a chuck, a main shaft box capable of being slidably adjusted is also installed on the top surface of the lathe bed, a motor is arranged in the main shaft box, a pressure plate is fixedly connected to the main shaft end of the motor, a rotating shaft is coaxially fixedly connected to the side surface of the pressure plate, and a boring cutter is installed at the tail end position of the rotating shaft; the boring lathe further comprises a pressure applying assembly which is used for applying axial stress to the pressure plate. The boring lathe applies stress to the pressure plate through the pressure applying assembly, so that the rotating shaft is extruded by additional axial stress of the vibration force transmitted by the rigid contact between the boring cutter and the wear-resistant pipe, the vibration frequency and the vibration amplitude of the rotating shaft are reduced, the stability of the rotating shaft and the boring cutter is ensured, the roughness of the surface of the wear-resistant pipe caused by vibration is reduced, and the machining precision is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of lathe machining, in particular to a boring lathe for wear-resistant pipelines. BACKGROUND

[0002] Boring is a subtractive manufacturing process that uses specially designed cutting tools to enlarge already drilled or cast holes, which is a common type in traditional mechanical machining and is used for manufacturing various parts and workpieces.

[0003] For example, Chinese Patent No. CN117206569B discloses a large wear-resistant pipeline boring lathe, which comprises a base provided with a fixing mechanism, the fixing mechanism fixes a large pipeline, an internal boring mechanism moves, the base is provided with an external boring mechanism, the external boring mechanism bores the outer wall of the pipeline, the base is provided with a supporting mechanism, the supporting mechanism supports pipelines with different diameters, the fixing mechanism is provided with an internal boring mechanism, and the internal boring mechanism bores the inner wall of the pipeline. The device can simultaneously bore the inner and outer walls of the pipeline, the angle of the boring tool can be adjusted, the angle of the entire boring arm can also be adjusted, can adapt to pipelines with different inner diameters, and can bore difficult machining surfaces such as steps and curved surfaces on the inner wall of the pipeline. The application has the advantages of simultaneously boring the inner and outer walls of the pipeline, changing the boring position and adjusting the angle of the tool.

[0004] However, when boring the wear-resistant pipeline in this way, due to the high wear resistance, high hardness, oxidation resistance and corrosion resistance of the wear-resistant pipeline, the cutting edge may produce a large vibration when boring the wear-resistant pipeline, which may cause strong bending elastic deflection and simple harmonic motion of the boring bar due to insufficient deflection of the boring bar under stress, resulting in tool breaking or other phenomena that reduce machining precision, thereby affecting the machining precision. SUMMARY

[0005] The application aims to provide a boring lathe for wear-resistant pipelines to solve at least one technical problem in the prior art.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme: a boring lathe for wear-resistant pipelines, comprising a lathe bed, a chuck carrier is fixedly installed on the top surface of the lathe bed, a wear-resistant pipe is fixedly installed on the side of the chuck carrier through a chuck, a main shaft box capable of being slidably adjusted is also installed on the top surface of the lathe bed, a motor is arranged in the main shaft box, a pressure plate is fixedly connected to the main shaft end of the motor, a rotating shaft is coaxially fixedly connected to the side surface of the pressure plate, and a boring tool is installed at the end position of the rotating shaft.

[0007] Further comprising a pressure applying assembly for applying axial stress to the pressure plate.

[0008] Preferably, the pressure application assembly includes a connector fixedly installed at the end of the motor spindle. A pressure plate is fixedly connected to the side end of the connector. Two clutch brackets are rotatably installed on the inner wall of an annular groove opened on the side wall of the connector. The middle part of each of the two clutch brackets is provided with a spring connected to the inner wall of the annular groove. A pressure rod is connected to the side wall of the clutch bracket. One end of the pressure rod is fixedly connected to an inclined block. The pressure plate and the inclined block are in contact with each other, and the contact surfaces are inclined surfaces in opposite directions.

[0009] Preferably, a pipe rack for wear-resistant pipes to pass through is slidably installed on the top surface of the bed, a shaft frame box for a rotating shaft to pass through is fixedly installed on the top surface of the bed, an electromagnetic ring is fixedly installed on the outer wall of the rotating shaft, a sliding ring is slidably installed on the outer wall of the rotating shaft, and a magnetic block that can repel or attract the electromagnetic ring is provided on the side wall of the sliding ring. Multiple rotating rods arranged in a ring are rotatably installed on the outer wall of the electromagnetic ring, and an elastic telescopic rod is rotatably installed between the outer wall of the sliding ring and each rotating rod. A rotating seat is rotatably installed at the end of each rotating rod, and a roller is rotatably installed inside the rotating seat.

[0010] Preferably, a liquid storage tank is fixedly installed on the top surface of the bed located on the side of the chuck frame, and a spray nozzle that communicates unidirectionally with the liquid storage tank is fixedly installed on the side wall of the chuck frame, and the liquid storage tank is connected to an external liquid supply device.

[0011] Preferably, a rotatable reciprocating screw is slidably installed in the cavity inside the bed. A sliding nut is threadedly connected to the outer wall of the reciprocating screw and slidably installed in the cavity. The cross-section of the sliding nut is equal to the cross-section of the cavity. The chuck frame is also provided with a pressurizing chamber that is unidirectionally connected to the liquid storage tank. The pressurizing chamber is connected to the cavity through a buried pipe. A unidirectional air outlet valve is provided between the buried pipe and the cavity. A unidirectional air inlet is also provided above the cavity.

[0012] Preferably, the shaft frame box is provided with a through groove, and the through groove is provided with a drive gear that is slidably connected to the outer wall of the rotating shaft by a flat key. The through groove is also provided with a transmission gear that can mesh with the drive gear. The bed below the through groove is provided with a cylinder, and the main shaft of the cylinder is connected to a fixed gear that meshes with a reciprocating lead screw through a connecting pipe.

[0013] Preferably, a shock absorber is provided in the circular groove inside the rotating shaft, and both ends of the shock absorber are provided with elastic rings, the diameter of which is smaller than the inner diameter of the circular groove.

[0014] Preferably, the boring tool installed on the end of the wear-resistant tube extending into the rotating shaft is a single-edged boring tool.

[0015] Preferably, the outer wall of the rotating rod has a storage cavity that allows the elastic telescopic rod to rotate completely into it.

[0016] Preferably, the wear-resistant tube is fixedly installed on the side wall of the chuck frame using a rounding clamp.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] I. This invention applies stress to the pressure plate through the pressure application component, causing the rotating shaft to be subjected to additional axial stress compression due to the vibration force transmitted by the rigid contact between the boring tool and the wear-resistant tube. This reduces the vibration frequency and amplitude of the rotating shaft, ensures the stability of the rotating shaft and the boring tool, reduces the increase in surface roughness of the wear-resistant tube caused by vibration, thereby improving machining accuracy. Furthermore, the vibration-damping rotating shaft also helps to extend the service life of the cutting tool.

[0019] Second, the present invention uses the centrifugal force generated when the rotating shaft rotates at high speed to drive the clutch frame to rotate outward, and causes the inclined block and the pressure plate to squeeze each other, causing the pressure plate to generate axial internal stress. This stress cancels out the vibration force transmitted by the rotating shaft to the pressure plate, thereby reducing the vibration frequency and amplitude of the rotating shaft and the boring tool. This allows the boring machine to further optimize the cutting parameters and improve the stability and efficiency of the cutting process.

[0020] Third, this invention uses an electromagnetic ring to drive the sliding rings away from each other, causing the rotating rod and the elastic telescopic rod to provide radial support for the rotating shaft together, thus avoiding radial vibration or deformation of the rotating shaft that would reduce machining accuracy. Furthermore, since the rotating rod and the elastic telescopic rod together provide radial elastic support for the rotating shaft, radial vibration can be absorbed and consumed by the elastic telescopic rod, further improving the stability of the boring tool. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a side cross-sectional view of the present invention;

[0023] Figure 3 This is a three-dimensional structural cross-sectional view of the present invention;

[0024] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a cross-section of the pressure application component in the present invention. Figure 1 ;

[0026] Figure 6 This is a cross-section of the pressure application component in the present invention. Figure 2 ;

[0027] Figure 7 This is a three-dimensional structural diagram of the reciprocating lead screw in this invention;

[0028] Figure 8This is a schematic diagram of the electromagnetic ring and its related three-dimensional structure in this invention.

[0029] In the diagram: 1. Bed; 2. Spindle box; 3. Shaft support box; 4. Pipe rack; 5. Chuck rack; 6. Liquid storage tank; 7. Rotating shaft; 8. Wear-resistant tube; 9. Motor; 10. Reciprocating screw; 11. Pressurizing chamber; 12. Spray nozzle; 13. Shock absorber; 14. Cylinder; 15. Connecting pipe; 16. Fixed gear; 17. Driving gear; 18. Transmission gear; 19. Electromagnetic ring; 20. Sliding ring; 21. Rotating rod; 22. Rotating seat; 23. Elastic telescopic rod; 24. Roller; 25. Storage chamber; 26. Connecting piece; 27. Clutch frame; 28. Spring; 29. ​​Pressure rod; 30. Pressure plate; 31. Wedge block; 32. Sliding nut. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1 to 8 The present invention provides a technical solution: a wear-resistant pipe boring lathe, including a bed 1, a chuck frame 5 fixedly installed on the top surface of the bed 1, a wear-resistant pipe 8 fixedly installed on the side of the chuck frame 5 via a chuck, a slidably adjustable spindle box 2 also installed on the top surface of the bed 1, a motor 9 is provided inside the spindle box 2, a pressure plate 30 is fixedly connected to the end of the spindle of the motor 9, a rotating shaft 7 is coaxially fixedly connected to the side of the pressure plate 30, and a boring tool is installed at the end of the rotating shaft 7;

[0032] It also includes a pressure application assembly for applying axial stress to the pressure plate 30.

[0033] In use, the wear-resistant tube 8 is first fixedly mounted on the side wall of the chuck frame 5 using a chuck. The axis of the wear-resistant tube 8 is adjusted so that it is aligned with the axis of the rotating shaft 7. Then, the spindle box 2 is driven to move the rotating shaft 7 close to the wear-resistant tube 8, and the motor 9 drives the rotating shaft 7 and the boring tool to rotate together along the axis of the rotating shaft 7. The feed speed of the spindle box 2 is then adjusted to bore the inner wall of the wear-resistant tube 8. When the boring tool and the wear-resistant tube 8 make rigid contact, causing the rotating shaft 7 to vibrate axially, the pressure application component applies axial stress to the pressure plate 30, thereby reducing the vibration frequency of the pressure plate 30 and the rotating shaft 7, thus achieving the purpose of damping the vibration of the rotating shaft 7 and the boring tool, thereby improving the machining accuracy of the wear-resistant tube 8.

[0034] In this way, by applying stress to the pressure plate 30 through the pressure application component, the rotating shaft 7 is subjected to additional axial stress compression due to the vibration force transmitted by the rigid contact between the boring tool and the wear-resistant tube 8. This reduces the vibration frequency and amplitude of the rotating shaft 7, ensures the stability of the rotating shaft 7 and the boring tool, reduces the increase in surface roughness of the wear-resistant tube 8 caused by vibration, thereby improving machining accuracy. Furthermore, the vibration-damping rotating shaft 7 also helps to extend the service life of the cutting tool.

[0035] Furthermore, the pressure application assembly includes a connector 26 fixedly installed at the end of the motor 9 spindle. A pressure plate 30 is fixedly connected to the side of the connector 26. Two clutch brackets 27 are rotatably installed on the inner wall of the annular groove opened on the side wall of the connector 26. Springs 28 are respectively provided in the middle part of the two clutch brackets 27 and the inner wall of the annular groove. A pressure rod 29 is connected to the side wall of the clutch bracket 27. A wedge block 31 is fixedly connected to one end of the pressure rod 29. The pressure plate 30 and the wedge block 31 are in contact, and the contact surfaces are set as inclined surfaces in opposite directions.

[0036] A specific implementation of the pressure application component is provided based on the above embodiments. See details below. Figure 5 and Figure 6 When the motor 9 drives the rotating shaft 7 and the connecting piece 26 to rotate together, the clutch frame 27 is affected by centrifugal force, compresses the spring 28 and moves closer to the inner wall of the annular groove, causing the pressure rod 29 and the inclined block 31 to rotate relative to the pressure plate 30. Since the pressure plate 30 and the inclined block 31 are in contact and the contact surface is set as an inclined surface in opposite directions, the inclined block 31 increases the squeezing effect on the pressure plate 30 when it rotates, thereby increasing the internal stress of the pressure plate 30. The internal stress is used to reduce the vibration frequency and vibration amplitude of the rotating shaft 7 and the pressure plate 30, so as to achieve the purpose of applying axial stress to the pressure plate 30.

[0037] In this way, the centrifugal force generated by the high-speed rotation of the rotating shaft 7 drives the clutch frame 27 to rotate outward, and causes the inclined block 31 and the pressure plate 30 to squeeze each other, causing the pressure plate 30 to generate axial internal stress. This stress cancels out the vibration force transmitted by the rotating shaft 7 to the pressure plate 30, thereby reducing the vibration frequency and amplitude of the rotating shaft 7 and the boring tool. This allows the boring machine to further optimize the cutting parameters and improve the stability and efficiency of the cutting process.

[0038] Furthermore, a pipe rack 4 for wear-resistant pipes 8 to pass through is slidably installed on the top surface of the bed 1, and a shaft frame box 3 for rotating shafts 7 to pass through is fixedly installed on the top surface of the bed 1. An electromagnetic ring 19 is fixedly installed on the outer wall of the rotating shaft 7, and a sliding ring 20 is slidably installed on the outer wall of the rotating shaft 7. The side wall of the sliding ring 20 is provided with magnetic blocks that can repel or attract the electromagnetic ring 19. Multiple rotating rods 21 arranged in a ring are rotatably installed on the outer wall of the electromagnetic ring 19. An elastic telescopic rod 23 is rotatably installed between the outer wall of the sliding ring 20 and each rotating rod 21. A rotating seat 22 is rotatably installed at the end of each rotating rod 21, and a roller 24 is rotatably installed inside the rotating seat 22.

[0039] As described in the above embodiments, when the rotating shaft 7 gradually penetrates into the wear-resistant tube 8 under the drive of the spindle box 2, the excessive length of the rotating shaft 7 extending out of the shaft support box 3 makes it easy for the rotating shaft 7 to undergo bending elastic deformation and simple harmonic motion due to its own weight or insufficient rigidity and deflection. This causes the boring tool to vibrate radially, reducing the machining quality of the wear-resistant tube 8. At this time, the electromagnetic ring 19 can be energized to push the sliding ring 20 away from each other, and drive the rotating rod 21 and the elastic telescopic rod 23 to rotate and expand together until the roller 24 contacts the inner wall of the wear-resistant tube 8. This provides radial support for the rotating shaft 7, preventing elastic deformation or simple harmonic motion of the rotating shaft 7, which would cause the boring tool to deflect or wobble, thus affecting the machining accuracy and surface quality of the wear-resistant tube 8.

[0040] In this way, the electromagnetic ring 19 drives the sliding rings 20 away from each other, causing the rotating rod 21 and the elastic telescopic rod 23 to provide radial support for the rotating shaft 7 together, avoiding radial vibration or deformation of the rotating shaft 7 that would reduce machining accuracy. Furthermore, since the rotating rod 21 and the elastic telescopic rod 23 together provide radial elastic support for the rotating shaft 7, the radial vibration can be absorbed and consumed by the elastic telescopic rod 23, further improving the stability of the boring tool.

[0041] It is worth mentioning that, since the contact position between the roller 24 and the wear-resistant tube 8 is after the boring tool and the wear-resistant tube 8 are boring positions, the contact surface between the roller 24 and the wear-resistant tube 8 is relatively smooth. This can avoid excessive friction causing a decrease in the rotation speed of the rotating shaft 7, thereby affecting the cutting parameters. In addition, the rotating seat 22 is rotatably mounted on the end of the rotating rod 21, allowing the roller 24 to rotate 360 ​​degrees, further reducing the contact resistance between the roller 24 and the wear-resistant tube 8, and providing radial support force to the rotating shaft 7 while ensuring the feed speed.

[0042] Furthermore, a liquid storage tank 6 is fixedly installed on the top surface of the bed 1 located on the side of the chuck frame 5, and a spray nozzle 12 that is unidirectionally connected to the liquid storage tank 6 is fixedly installed on the side wall of the chuck frame 5, and the liquid storage tank 6 is connected to an external liquid supply device.

[0043] As can be seen from the above embodiments, cutting fluid and suitable hydraulic pressure are supplied to the storage tank 6 by an external liquid supply device, so that when the boring tool cuts the wear-resistant tube 8, the cutting fluid can be sprayed from the spray nozzle 12 and enter the wear-resistant tube 8. This cools the cutting area and washes the chips out of the wear-resistant tube 8, preventing the chips from participating in secondary cutting and causing burrs or roughness inside the wear-resistant tube 8.

[0044] Furthermore, a reciprocating screw 10 that can rotate is slidably installed in the cavity inside the bed 1. A sliding nut 32 that is slidably installed in the cavity is threadedly connected to the outer wall of the reciprocating screw 10. The cross-section of the sliding nut 32 is equal to the cross-section of the cavity. The chuck frame 5 is also provided with a pressurizing chamber 11 that is unidirectionally connected to the liquid storage tank 6. The pressurizing chamber 11 is connected to the cavity through a buried pipe. A one-way air outlet valve is provided between the buried pipe and the cavity. A one-way air inlet is also provided above the cavity.

[0045] The above embodiments provide a specific implementation method for pressurizing the liquid storage tank 6. See details below. Figure 2 and Figure 3 When the external structure drives the reciprocating screw 10 to rotate, it causes the sliding nut 32 to slide back and forth, such as... Figure 3 As shown, when the sliding nut 32 slides to the right, the air pressure on the right side of the sliding nut 32 increases, forcing the gas into the pressurizing chamber 11 and injecting gas into the liquid storage tank 6 in one direction. At this time, a negative pressure is generated on the left side of the sliding nut 32 and gas is drawn in through the one-way air inlet, causing the air pressure in the liquid storage tank 6 to increase sharply. This causes the cutting fluid in the liquid storage tank 6 to be quickly squeezed out to the spray nozzle 12 and sprayed into the wear-resistant tube 8. The high-speed flow of the cutting fluid flushes the inside of the wear-resistant tube 8, improving the cleaning effect inside the wear-resistant tube 8.

[0046] Furthermore, the shaft frame box 3 is provided with a through groove, and the through groove is provided with a drive gear 17 that is slidably connected to the outer wall of the rotating shaft 7 by a flat key. The through groove is also provided with a transmission gear 18 that can mesh with the drive gear 17. The bed 1 below the through groove is provided with a cylinder 14. The main shaft of the cylinder 14 is rotatably connected to one end of the reciprocating screw 10 through a connecting pipe 15. The outer wall of the reciprocating screw 10 is fixedly installed with a fixed gear 16 that can mesh with the transmission gear 18.

[0047] The above embodiments provide a specific driving method for the reciprocating lead screw 10, see details below. Figure 2 When the motor 9 stops rotating, the cylinder 14 pushes the connecting pipe 15 and the reciprocating screw 10 to move to the right together, so that the fixed gear 16 meshes with the driving gear 17 through the transmission gear 18. The rotational inertia of the rotating shaft 7 drives the reciprocating screw 10 to rotate, recovers the remaining kinetic energy of the rotating shaft 7, pressurizes the liquid storage tank 6, and performs deep cleaning on the finished wear-resistant pipe 8. The staff observes and measures the processing quality and surface roughness.

[0048] Furthermore, a shock absorber 13 is provided in the circular slot opened inside the rotating shaft 7. Both ends of the shock absorber 13 are provided with elastic rings, and the diameter of the elastic rings is smaller than the inner diameter of the circular slot.

[0049] As can be seen from the above implementation method, when the motor 9 drives the rotating shaft 7 to rotate, the shock absorber 13 in the circular slot will rotate around in the circular slot because the diameter of the elastic rings at both ends is smaller than the inner diameter of the circular slot. Due to the friction, its rotational angular velocity is always lower than the rotational angular velocity of the rotating shaft 7. This allows the elastic rings to generate different vibration frequencies when they collide with the rotating shaft 7. The vibrations generated when they come into contact with the boring tool and the inner wall of the wear-resistant tube 8 will interact and cancel each other out, thereby reducing the amplitude of the vibration of the rotating shaft 7 and improving the machining accuracy of the boring tool on the wear-resistant tube 8.

[0050] Furthermore, the boring tool installed on the rotating shaft 7 at the end of the wear-resistant tube 8 is set as a single-edged boring tool.

[0051] As can be seen from the above embodiments, since the boring tool at the end of the wear-resistant tube 8 is a single-edged boring tool, the processing requirements of wear-resistant tubes 8 with different diameters can be adapted by changing the cutting head of different sizes. Moreover, the single-edged boring tool can correct the skewness or positional error of the axis of the wear-resistant tube 8, thereby improving the processing accuracy of the wear-resistant tube 8. Due to its simple structure, the single-edged boring tool generates less vibration during high-speed processing, which helps to improve the processing quality.

[0052] Furthermore, the outer wall of the rotating rod 21 is provided with a storage cavity 25 that allows the elastic telescopic rod 23 to be fully rotated into.

[0053] As can be seen from the above implementation method, when the electromagnetic ring 19 drives the sliding rings 20 to move closer to each other (see details...), Figure 8 At this time, the elastic telescopic rod 23 rotates into the receiving cavity 25 until it is fully rotated in. When it is fully rotated in, the rotating rod 21 can be parallel to the rotating shaft 7. The outer wall of the rotating shaft is provided with a groove for the complete rotation of the rotating rod 21. This ensures that the diameter of the rotating rod 21 and the elastic telescopic rod 23 after contraction does not exceed the outer diameter of the rotating rod 21, thus avoiding the rotating rod 21 and the elastic telescopic rod 23 from obstructing the feed of the rotating shaft 7.

[0054] Furthermore, the wear-resistant tube 8 is fixedly installed on the side wall of the chuck frame 5 by a rounding clamp.

[0055] As can be seen from the above embodiments, since the circular clamping fixture clamps and fixes the wear-resistant tube 8 by spreading outward from a fixed center, the axial position of the wear-resistant tube 8 is relatively fixed and easy to align with the axis of the rotating shaft 7, which simplifies the positioning steps of the wear-resistant tube 8 and thus improves the processing efficiency of the wear-resistant tube 8.

[0056] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant pipe boring lathe, comprising a bed (1), characterized in that: A chuck frame (5) is fixedly installed on the top surface of the bed (1). A wear-resistant tube (8) is fixedly installed on the side of the chuck frame (5) via a chuck. A slidably adjustable spindle box (2) is also installed on the top surface of the bed (1). A motor (9) is installed inside the spindle box (2). A pressure plate (30) is fixedly connected to the end of the spindle of the motor (9). A rotating shaft (7) is coaxially fixedly connected to the side of the pressure plate (30). A boring tool is installed at the end of the rotating shaft (7). The bed also includes a pressure application component, which is used to apply axial stress to the pressure plate (30). The pressure application assembly includes a connector (26) fixedly installed at the end of the motor (9) spindle. A pressure plate (30) is fixedly connected to the side end of the connector (26). Two clutches (27) are rotatably installed on the inner wall of the annular groove opened on the side wall of the connector (26). The middle part of the two clutches (27) is respectively provided with a spring (28) on the inner wall of the annular groove. A pressure rod (29) is connected to the side wall of the clutches (27). A wedge (31) is fixedly connected to one end of the pressure rod (29). The pressure plate (30) is in contact with the wedge (31) and the contact surface is set as a wedge with opposite directions. The top surface of the bed (1) is slidably fitted with a pipe rack (4) through which a wear-resistant tube (8) can pass. The top surface of the bed (1) is fixedly fitted with a shaft frame box (3) through which a rotating shaft (7) can pass. An electromagnetic ring (19) is fixedly fitted on the outer wall of the rotating shaft (7). A sliding ring (20) is slidably fitted on the outer wall of the rotating shaft (7). The side wall of the sliding ring (20) is provided with a magnetic block that can repel or attract the electromagnetic ring (19). Multiple rotating rods (21) arranged in a ring are rotatably fitted on the outer wall of the electromagnetic ring (19). An elastic telescopic rod (23) is rotatably fitted between the outer wall of the sliding ring (20) and each rotating rod (21). A rotating seat (22) is rotatably fitted at the end of each rotating rod (21). A roller (24) is rotatably fitted inside the rotating seat (22). A reciprocating screw (10) that can rotate is slidably installed in the cavity of the bed (1). A sliding nut (32) that is slidably installed in the cavity is threaded on the outer wall of the reciprocating screw (10). The cross-section of the sliding nut (32) is equal to the cross-section of the cavity. A pressurizing chamber (11) that is unidirectionally connected to the liquid storage tank (6) is also provided in the chuck frame (5). The pressurizing chamber (11) is connected to the cavity through a buried pipe. A one-way air outlet valve is provided between the buried pipe and the cavity. A one-way air inlet is also provided above the cavity. The shaft frame box (3) is provided with a through groove, and the through groove is provided with a drive gear (17) that is slidably connected to the outer wall of the rotating shaft (7) by a flat key. The through groove is also provided with a transmission gear (18) that can mesh with the drive gear (17). The bed (1) below the through groove is provided with a cylinder (14). The main shaft of the cylinder (14) is rotatably connected to one end of the reciprocating screw (10) through a connecting pipe (15). The outer wall of the reciprocating screw (10) is fixedly installed with a fixed gear (16) that can mesh with the transmission gear (18).

2. The wear-resistant pipe boring lathe according to claim 1, characterized in that: A liquid storage tank (6) is fixedly installed on the top surface of the bed (1) located on the side of the chuck frame (5). A spray nozzle (12) that is unidirectionally connected to the liquid storage tank (6) is fixedly installed on the side wall of the chuck frame (5). The liquid storage tank (6) is connected to an external liquid supply device.

3. The wear-resistant pipe boring lathe according to claim 1, characterized in that: A shock absorber (13) is provided in the circular slot opened in the rotating shaft (7). Both ends of the shock absorber (13) are provided with elastic rings, and the diameter of the elastic rings is smaller than the inner diameter of the circular slot.

4. The wear-resistant pipe boring lathe according to claim 3, characterized in that: The boring tool installed on the rotating shaft (7) and extending into the end of the wear-resistant tube (8) is a single-edged boring tool.

5. The wear-resistant pipe boring lathe according to claim 4, characterized in that: The outer wall of the rotating rod (21) is provided with a storage cavity (25) into which the elastic telescopic rod (23) can be fully rotated.

6. The wear-resistant pipe boring lathe according to claim 1, characterized in that: The wear-resistant tube (8) is fixedly installed on the side wall of the chuck frame (5) by a rounding clamp.

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