A lathe of eccentric type shockproof boring bar support device for processing inner wall of tank connecting pipe

Abstract

The application discloses a lathe of eccentric shockproof boring bar supporting device for tank body connecting pipe inner wall processing and relates to the technical field of lathe equipment, which comprises a lathe main body. When the tank body connecting pipe inner wall is continuously processed, the pipe wall is gradually thinned along with the cutting depth, the contact force between the supporting wheel and the pipe wall changes, the abutment plate and the vertical plate generate compression displacement under the action of the first damping spring, the vertical plate drives the clamping groove on the fixed plate to slightly move in the vertical direction, the clamping groove slides along the self-locking rod, the self-locking rod is elastically connected with the connecting plate through the compression spring, after the clamping groove is moved to the position, the self-locking rod is automatically clamped into the corresponding clamping groove under the action of the elastic assembly, automatic locking is realized, along with the pipe wall being thinned by cutting, the gap between the supporting wheel and the pipe wall dynamically changes, the cooperation of the clamping groove and the self-locking rod can automatically lock the new position, the dynamic gap generated in the processing process can be compensated without manual intervention, and the continuous effectiveness of the support is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of lathe equipment technology, and in particular to a lathe with an eccentric anti-vibration boring bar support device for machining the inner wall of a tank nozzle. Background Technology

[0002] As a critical connecting component in pressure vessels, chemical storage tanks, oil tanks, and large pipeline systems, the quality of the inner wall machining of tank fittings directly affects the sealing performance, pressure bearing capacity, and service life of the tank. In actual production, the inner wall of tank fittings typically requires boring using a lathe and boring bar to ensure that the dimensional accuracy, roundness, and surface roughness of the inner hole meet design requirements.

[0003] In the machining of the inner walls of large workpieces such as tank nozzles, due to the special structure of the workpiece and the limited machining space, the boring bar usually needs to extend into the workpiece with a large overhang length for cutting. This long overhang structure leads to a significant reduction in the system stiffness of the boring bar, making it prone to bending deformation and vibration under cutting forces, which seriously restricts the improvement of machining accuracy and surface quality.

[0004] The existing boring bar support device still has the following problems in actual use.

[0005] Traditional boring bar support devices often employ simple fixed support blocks or single-point support wheels. These have few support points, which are unevenly distributed, failing to provide uniform radial constraint on the boring bar. This results in low centering accuracy, and the support structure is typically a rigid connection, making it unsuitable for tank pipes of varying inner diameters and lacking versatility. Furthermore, as the cutting progresses and the pipe wall thins, the contact force between the support wheel and the pipe wall continuously changes dynamically. If the support points remain in their original positions, extreme situations such as gap loosening and loss of support can easily occur. This usually requires manual readjustment of the support position by the operator after machine shutdown, increasing auxiliary time and reducing processing efficiency. Additionally, most existing support devices only focus on radial support, neglecting the radial runout and angular tilting of the boring bar during axial feed. This lack of effective constraint on the radial runout and angular tilting of the boring bar leads to axial movement during feed. Summary of the Invention

[0006] The purpose of this application is to provide a lathe with an eccentric anti-vibration boring bar support device for machining the inner wall of a tank nozzle. The slot slides along the self-locking rod, which is elastically connected to the connecting plate through a compression spring. When the slot moves into position, the self-locking rod automatically engages with the corresponding slot under the action of the elastic component, achieving automatic locking. As the pipe wall is cut thinner, the gap between the support wheel and the pipe wall will change dynamically. The cooperation between the slot and the self-locking rod can automatically lock the new position, compensating for the dynamic gap generated during machining without manual intervention, and ensuring the continuous effectiveness of the support.

[0007] To achieve the above objectives, this application provides the following technical solution: a lathe with an eccentric anti-vibration boring bar support device for machining the inner wall of a tank nozzle, comprising:

[0008] The lathe body has a boring bar body at its front end. A mounting block is fixed to the outer wall of the boring bar body. Six sets of sliding grooves are opened on the surface of the mounting block. A screw is rotatably connected inside the sliding groove. A gear ring is movably connected to the outer wall of the mounting block. Six sets of transmission gears are arranged on the outer side of the gear ring. A worm gear assembly is arranged at the end of the transmission gear.

[0009] The sliding groove is internally connected to a connecting block, one end of which is fixed to a sliding rod, one end of which is internally connected to a guide rod, one end of which is fixed to a connecting plate, a first damping spring is distributed at the upper end of the connecting plate, vertical plates are fixed at both ends of the connecting plate, a support wheel is provided at the upper end of the vertical plate, mounting brackets are fixed on both sides of the sliding rod, and a second damping spring is distributed inside the mounting bracket;

[0010] A fixing plate is fixed to one side of the vertical plate, and slots are evenly opened on one side of the fixing plate. A self-locking rod connected by an elastic component is provided inside the slot. Fixing blocks are fixed to both sides of the vertical plate. Grooves are opened inside the fixing blocks. A movable block is slidably connected in the groove. A rubber layer is fixed to the bottom of the groove. An inclined rod is fixed to one side of the movable block. An auxiliary wheel is provided at the upper end of the inclined rod.

[0011] Preferably, the outer wall of the mounting block is rotatably connected to a mounting ring, and the gear ring is located on the outer wall of the mounting ring in a fixed connection.

[0012] Preferably, the worm gear assembly includes a worm shaft fixed to the upper end of the screw, a worm body meshing with one side of the worm shaft, the worm body being rotatably connected inside the slide groove, and one end of the worm body being fixedly connected to a transmission gear.

[0013] Preferably, the connecting block is threadedly connected to the screw.

[0014] Preferably, the slide bar is located on one side of the mounting block, and the slide bar is configured in six groups.

[0015] Preferably, the upper end of the slide bar is fixed with a mounting shell, the lower end face of the mounting shell is fixedly connected to the upper end of the first shock-absorbing spring, and the upper end of the second shock-absorbing spring is fixedly connected to the lower end of the vertical plate.

[0016] Preferably, the elastic component includes a compression spring disposed on the outer wall of the mounting bracket, a mounting shaft disposed on the outer wall of the mounting bracket, a connecting plate rotatably connected to the outer wall of the mounting shaft, the other end of the compression spring being connected to the inner side of the connecting plate, and the self-locking rod being fixedly connected to the upper end of the connecting plate.

[0017] Preferably, the movable block is slidably connected to the groove.

[0018] Preferably, the upper end of the inclined rod is fixed with a mounting base, and the auxiliary wheel is rotatably connected to the upper end of the mounting base.

[0019] Preferably, the auxiliary wheel is located on both sides of the support wheel.

[0020] In summary, the present invention has the following beneficial effects:

[0021] Firstly, in this invention, six sets of transmission gears are uniformly driven by a gear ring, and then transmitted to six screws via a worm gear assembly. This ensures the synchronous and equidistant extension and retraction of the six sets of support wheels, keeping the boring bar always centered in the tank connector with high centering accuracy. Furthermore, the worm gear assembly has a self-locking function; even when subjected to cutting reaction force after the support wheel is in contact with the pipe wall, the screw will not reverse, ensuring a stable and reliable support state and preventing loosening due to vibration. Moreover, the six sets of support wheels are evenly distributed along the circumference, so that the boring bar receives uniform radial support force inside the tank connector, effectively suppressing radial runout and vibration of the boring bar, improving machining accuracy and surface quality. At the same time, the equidistant extension and retraction of the six sets of support wheels can adapt to tank connectors with different inner diameters.

[0022] Secondly, in this invention, by setting a first damping spring and a second damping spring, an upper and lower clamping buffer structure for the support wheel is formed, which can effectively absorb the combined vibration from the radial and tangential directions and significantly reduce the vibration amplitude of the boring bar.

[0023] Thirdly, in this invention, as the inner wall of the tank pipe is continuously processed, the pipe wall gradually thins as the cutting progresses, and the contact force between the support wheel and the pipe wall changes. Under the action of the first damping spring, the connecting plate and the vertical plate generate compression displacement. The vertical plate drives the slot on the fixed plate to move slightly in the vertical direction. The slot slides along the self-locking rod, which is elastically connected to the connecting plate through a compression spring. When the slot moves into place, the self-locking rod automatically engages in the corresponding slot under the action of the elastic component, achieving automatic locking. As the pipe wall is cut thinner, the gap between the support wheel and the pipe wall will change dynamically. The cooperation between the slot and the self-locking rod can automatically lock the new position, compensating for the dynamic gap generated during processing without manual intervention, and ensuring the continuous effectiveness of the support.

[0024] Fourthly, in this invention, when the support wheel contacts the inner wall of the tank connector, the support wheel is pushed upward by the reaction force of the pipe wall. This force is transmitted to the movable block through the vertical plate and the fixed block. The movable block slides downward along the groove and presses the rubber layer. At the same time, the inclined rod drives the auxiliary wheel to extend outward, so that the auxiliary wheel is in close contact with the inner wall of the tank connector. At this time, the auxiliary wheels on both sides and the support wheel in the middle together form a multi-point support system to provide stable support for the boring bar's angular wobble. The auxiliary wheels are set on both sides of the support wheel and together with the support wheel form a multi-point support layout, which can effectively limit the boring bar's movement and offset in the axial feed direction, and significantly enhance the support rigidity and stability of the boring bar's angular wobble. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the device body;

[0027] Figure 2 A schematic diagram of the mounting ring structure for the device body;

[0028] Figure 3 This is a schematic diagram of the mounting block structure of the device body;

[0029] Figure 4 This is a schematic diagram of the sliding groove structure of the device body;

[0030] Figure 5 This is a schematic diagram of the gear ring structure of the device body;

[0031] Figure 6 This is a schematic diagram of the internal structure of the slide groove of the device body;

[0032] Figure 7 A schematic diagram of the outer casing structure for the device body;

[0033] Figure 8 This is a schematic diagram of the connecting plate structure of the device body;

[0034] Figure 9 This is a schematic diagram of the device's main body fixing plate structure;

[0035] Figure 10 This is a schematic diagram of the groove structure of the device body.

[0036] In the diagram: 1. Lathe body; 2. Boring bar body; 3. Mounting block; 301. Mounting ring; 302. Gear ring; 303. Slide groove; 304. Screw; 305. Worm gear shaft; 306. Worm body; 307. Transmission gear; 4. Connecting block; 401. Slide rod; 402. Guide rod; 403. Connecting plate; 404. Vertical plate; 405. Support wheel; 406. Mounting housing; 407. First damping spring; 408. Mounting bracket; 409. Second damping spring; 5. Mounting shaft; 501. Connecting plate; 502. Compression spring; 503. Self-locking rod; 504. Fixing plate; 505. Slot; 6. Fixing block; 601. Groove; 602. Movable block; 603. Rubber layer; 604. Diagonal rod; 605. Mounting seat; 606. Auxiliary wheel. Detailed Implementation

[0037] 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.

[0038] Example: Reference Figure 1 - Figure 10 The lathe shown is an eccentric anti-vibration boring bar support device for machining the inner wall of a tank nozzle, comprising:

[0039] The lathe body 1 has a boring bar body 2 at its front end. A mounting block 3 is fixed to the outer wall of the boring bar body 2. Six sets of sliding grooves 303 are opened on the surface of the mounting block 3. A screw 304 is rotatably connected inside the sliding grooves 303. A gear ring 302 is movably connected to the outer wall of the mounting block 3. Six sets of transmission gears 307 are arranged on the outer side of the gear ring 302. A worm gear assembly is arranged at the end of the transmission gears 307.

[0040] The sliding groove 303 has a connecting block 4 slidably connected inside. One end of the connecting block 4 is fixed with a sliding rod 401. One end of the sliding rod 401 is slidably connected with a guide rod 402. One end of the guide rod 402 is fixed with a connecting plate 403. The upper end of the connecting plate 403 is provided with a first damping spring 407. The two ends of the connecting plate 403 are fixed with vertical plates 404. The upper end of the vertical plates 404 is provided with a support wheel 405. The two sides of the sliding rod 401 are fixed with mounting brackets 408. The interior of the mounting brackets 408 is provided with a second damping spring 409.

[0041] A fixing plate 504 is fixed to one side of the vertical plate 404. The fixing plate 504 has evenly spaced slots 505 on one side. A self-locking rod 503 connected by an elastic component is provided inside the slot 505. Fixing blocks 6 are fixed to both sides of the vertical plate 404. The fixing blocks 6 have grooves 601 inside. A movable block 602 is slidably connected inside the groove 601. A rubber layer 603 is fixed to the bottom of the groove 601. A diagonal rod 604 is fixed to one side of the movable block 602. An auxiliary wheel 606 is provided at the upper end of the diagonal rod 604.

[0042] In one embodiment, the outer wall of the mounting block 3 is rotatably connected to a mounting ring 301, and a gear ring 302 is fixedly connected to the outer wall of the mounting ring 301. The worm gear assembly includes a worm shaft 305 fixed to the upper end of a screw 304. A worm body 306 is meshed with one side of the worm shaft 305. The worm body 306 is rotatably connected inside the slide groove 303. One end of the worm body 306 is fixedly connected to a transmission gear 307. The connecting block 4 is threadedly connected to the screw 304. The slide rod 401 is positioned... On one side of the mounting block 3, the slide rod 401 is set into six groups. The operating mounting ring 301 rotates on the mounting block 3, driving the gear ring 302 to rotate, which in turn drives the six groups of transmission gears 307 to rotate. Through the transmission of the worm gear assembly, the screw 304 inside the slide groove 303 is driven to rotate, so that the support wheels 405 set on the six groups of slide rods 401 can open and close synchronously. When the boring bar is inserted into the inner wall of the tank body pipe for machining, the six groups of support wheels 405 slide along the inner wall of the tank body pipe, thereby providing axial stable support for the boring bar.

[0043] Specifically, the operator rotates the mounting ring 301 on the mounting block 3. The mounting ring 301 drives the gear ring 302, which is fixedly connected to it, to rotate synchronously. The rotation of the gear ring 302 synchronously drives the six sets of transmission gears 307 to rotate. The transmission gears 307 drive the worm body 306, which is fixedly connected to it, to rotate. The worm body 306 meshes with the worm wheel shaft 305, thereby driving the screw 304 to rotate inside the slide groove 303. Since the connecting block 4 is threadedly connected to the screw 304, the rotation of the screw 304 is converted into the linear movement of the connecting block 4 along the slide groove 303, which in turn drives the support wheels 405 on the six sets of slide rods 401 to perform synchronous opening and closing movements.

[0044] Additional notes: The screw 304 and the worm gear assembly can be fitted with protective sleeves to protect the components.

[0045] When the boring bar is inserted into the inner wall of the tank body nozzle for machining, the six sets of support wheels 405 slide along the inner wall of the tank body nozzle, thereby providing axial stable support for the boring bar.

[0046] As one embodiment of this example, the upper end of the slide bar 401 is fixed with a mounting housing 406, the lower end of the mounting housing 406 is fixedly connected to the upper end of the first damping spring 407, and the upper end of the second damping spring 409 is fixedly connected to the lower end of the vertical plate 404. The first damping spring 407 and the second damping spring 409 buffer the support wheel 405 when it comes into contact with the inner wall of the tank pipe.

[0047] Furthermore, when the support wheel 405 contacts the inner wall of the tank pipe and is subjected to cutting vibration impact, the first damping spring 407 and the second damping spring 409 work together to compress and deform, absorbing and buffering the vibration energy from the pipe wall, and reducing the vibration amplitude transmitted to the boring bar body 2.

[0048] As one embodiment of this invention, the elastic component includes a compression spring 502 disposed on the outer wall of the mounting bracket 408, a mounting shaft 5 disposed on the outer wall of the mounting bracket 408, a connecting plate 501 rotatably connected to the outer wall of the mounting shaft 5, the other end of the compression spring 502 being connected to the inner side of the connecting plate 501, and a self-locking rod 503 being fixedly connected to the upper end of the connecting plate 501. When the inner wall of the tank pipe is continuously processed, the inner wall becomes thinner, and the connecting plate 403 and the vertical plate 404 are compressed by the first damping spring 407. The vertical plate 404 drives the slot 505 on the fixed plate 504 to move slightly vertically, and the slot 505 slides along the self-locking rod 503, automatically engaging and locking, thus solving the problem of dynamic gaps during processing.

[0049] The boring bar has a boring tool at one end to perform eccentric machining on the inner wall of the tank. During the continuous machining of the inner wall of the tank pipe, as the material is removed, the wall thickness gradually decreases and its rigidity decreases. Under the action of cutting force, slight radial elastic deformation or tool deflection may occur, causing the fit gap between the support wheel 405 and the inner wall to change. At this time, the connecting plate 403 and the vertical plate 404 will move slightly axially relative to the slide rod 401 under the elastic force of the first damping spring 407 to compensate for the gap. The movement of the vertical plate 404 drives the fixed plate 504 on its side to move synchronously. The slot 505 on the fixed plate 504 will be displaced relative to the self-locking rod 503 at the upper end of the connecting plate 501. Since the self-locking rod 503 is elastically connected to the mounting bracket 408 through the connecting plate 501 and the compression spring 502, the inclined surface of the slot 505 will push the self-locking rod 503 to continuously lock into the new slot under the action of the compression spring 502, realizing unidirectional and non-returning automatic locking.

[0050] In one embodiment of this invention, the movable block 602 is slidably connected to the groove 601, the upper end of the inclined rod 604 is fixed with a mounting base 605, and the auxiliary wheel 606 is rotatably connected to the upper end of the mounting base 605. The auxiliary wheel 606 is located on both sides of the support wheel 405. When the support wheel 405 contacts the inner wall of the tank pipe, the auxiliary wheels 606 on both sides are pressed down along the groove 601 through the movable block 602 and contact the rubber layer 603, so that the auxiliary wheel 606 is tightly attached to the inner wall of the tank pipe, which is used to support the boring bar angular deflection.

[0051] Additional notes: After processing, the connecting plate 501 can be manually lifted to disengage the self-locking rod 503 from the slot 505, and then the mounting ring 301 can be rotated in the opposite direction to retract the six sets of support wheels synchronously, so that the device can be removed from the workpiece.

[0052] Specifically, when the support wheel 405 contacts the inner wall of the tank pipe in the radial direction and supports the boring bar, the auxiliary wheels 606 located on both sides of the support wheel 405 also contact the inner wall at the same time. The auxiliary wheels 606 are fixed to the upper end of the inclined rod 604 by the mounting base 605. The lower end of the inclined rod 604 is connected to the movable block 602. The movable block 602 is slidably connected in the groove 601 of the fixed block 6. When the auxiliary wheel 606 is subjected to the reaction force of the inner wall, it will push the movable block 602 to slide down in the groove 601 through the inclined rod 604, and finally press it against the rubber layer 603 at the bottom of the groove 601. The elastic reaction force of the rubber layer 603 makes the auxiliary wheel 606 stick tightly to the inner wall, thereby providing auxiliary support force for the boring bar in terms of the boring bar angular deflection.

[0053] The working principle of this invention is as follows: The operator first rotates the mounting ring 301, which drives the gear ring 302 fixedly connected to it to rotate synchronously. The gear ring 302 drives the six sets of transmission gears 307 to rotate synchronously. The transmission gears 307 drive the worm body 306 fixedly connected to them to rotate. The worm body 306 meshes with the worm wheel shaft 305, thereby driving the screw 304 to rotate inside the slide groove 303. Since the connecting block 4 is threadedly connected to the screw 304, the rotation of the screw 304 is converted into the linear movement of the connecting block 4 along the slide groove 303, which in turn drives the support wheels 405 set on the six sets of slide rods 401 to perform synchronous opening and closing movements.

[0054] When the boring bar body 2 is inserted into the inner wall of the tank nozzle for machining, the six sets of support wheels 405 slide along the inner wall of the tank nozzle, thereby providing radial stability support for the boring bar body 2.

[0055] When the support wheel 405 contacts the inner wall of the tank pipe and is subjected to cutting vibration impact, the support wheel 405 transmits the vibration to the connecting plate 403 through the vertical plate 404. The lower end face of the mounting shell 406 is fixedly connected to the upper end of the first damping spring 407. The first damping spring 407 is deformed under pressure to absorb the vibration energy in the vertical direction. At the same time, the upper end of the second damping spring 409 set inside the mounting bracket 408 is fixedly connected to the lower end of the vertical plate 404. The second damping spring 409 buffers the vibration in the radial direction. The first damping spring 407 and the second damping spring 409 work together to reduce the vibration amplitude transmitted to the boring bar body 2.

[0056] During the continuous processing of the inner wall of the tank pipe, as the material is removed, the pipe wall thickness gradually decreases, and the fit gap between the support wheel 405 and the inner wall changes. Under the elastic force of the first damping spring 407, the connecting plate 403 and the vertical plate 404 move slightly axially relative to the slide rod 401 to compensate for the gap. The movement of the vertical plate 404 drives the fixed plate 504 fixed on its side to move synchronously. The slot 505 on the fixed plate 504 is displaced relative to the self-locking rod 503 at the upper end of the connecting plate 501. The self-locking rod 503 is elastically connected to the mounting bracket 408 through the connecting plate 501 and the compression spring 502. The inclined surface of the slot 505 pushes the self-locking rod 503 to continuously lock into the new slot under the action of the compression spring 502, realizing unidirectional, non-returning automatic locking, thereby dynamically compensating for the processing gap.

[0057] At the same time, the auxiliary wheels 606 located on both sides of the support wheel 405 also come into contact with the inner wall of the tank body pipe. The auxiliary wheels 606 are fixed to the upper end of the inclined rod 604 by the mounting base 605. The lower end of the inclined rod 604 is connected to the movable block 602. The movable block 602 is slidably connected in the groove 601 of the fixed block 6. When the auxiliary wheel 606 is subjected to the reaction force of the inner wall, the movable block 602 is pushed down in the groove 601 by the inclined rod 604 and finally pressed against the rubber layer 603 at the bottom of the groove 601. The elastic reaction force of the rubber layer 603 makes the auxiliary wheel 606 stick tightly to the inner wall, thereby providing auxiliary support force on the boring bar angular wobble, and finally achieving all-round anti-vibration and stable support for the boring bar body 2.

[0058] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lathe with an eccentric anti-vibration boring bar support device for machining the inner wall of a tank nozzle, characterized in that, include: A lathe body (1) is provided with a boring bar body (2) at the front end of the lathe body (1). A mounting block (3) is fixed on the outer wall of the boring bar body (2). Six sets of sliding grooves (303) are opened on the surface of the mounting block (3). A screw (304) is rotatably connected inside the sliding groove (303). A gear ring (302) is movably connected to the outer wall of the mounting block (3). Six sets of transmission gears (307) are provided on the outer side of the gear ring (302). A worm gear assembly is provided at the end of the transmission gear (307). The sliding groove (303) is internally connected to a connecting block (4), one end of the connecting block (4) is fixed to a sliding rod (401), one end of the sliding rod (401) is internally connected to a guide rod (402), one end of the guide rod (402) is fixed to a connecting plate (403), the upper end of the connecting plate (403) is provided with a first damping spring (407), both ends of the connecting plate (403) are fixed with vertical plates (404), the upper end of the vertical plate (404) is provided with a support wheel (405), both sides of the sliding rod (401) are fixed with mounting brackets (408), and the interior of the mounting brackets (408) is provided with a second damping spring (409). A fixing plate (504) is fixed to one side of the vertical plate (404). A sawtooth-shaped slot (505) is evenly opened on one side of the fixing plate (504). A self-locking rod (503) connected by an elastic component is provided inside the slot (505). Fixing blocks (6) are fixed to both sides of the vertical plate (404). A groove (601) is opened inside the fixing block (6). A movable block (602) is slidably connected inside the groove (601). A rubber layer (603) is fixed to the bottom of the groove (601). A diagonal rod (604) is fixed to one side of the movable block (602). An auxiliary wheel (606) is provided at the upper end of the diagonal rod (604).

2. The lathe for machining the inner wall of a tank nozzle according to claim 1, characterized in that: The outer wall of the mounting block (3) is rotatably connected to the mounting ring (301), and the gear ring (302) is fixedly connected to the outer wall of the mounting ring (301).

3. The lathe for machining the inner wall of a tank nozzle according to claim 1, characterized in that: The worm gear assembly includes a worm shaft (305) fixed at the upper end of a screw (304), a worm body (306) meshing with one side of the worm shaft (305), the worm body (306) being rotatably connected inside a slide groove (303), and one end of the worm body (306) being fixedly connected to a transmission gear (307).

4. The lathe for machining the inner wall of a tank nozzle according to claim 1, characterized in that: The connecting block (4) is threadedly connected to the screw (304).

5. The lathe for machining the inner wall of a tank nozzle according to claim 1, characterized in that: The slide bar (401) is located on one side of the mounting block (3), and the slide bar (401) is configured in six groups.

6. The lathe for machining the inner wall of a tank nozzle according to claim 1, characterized in that: The upper end of the slide bar (401) is fixed with a mounting shell (406), the lower end face of the mounting shell (406) is fixedly connected to the upper end of the first shock-absorbing spring (407), and the upper end of the second shock-absorbing spring (409) is fixedly connected to the lower end of the vertical plate (404).

7. The lathe for machining the inner wall of a tank nozzle according to claim 1, characterized in that: The elastic component includes a compression spring (502) disposed on the outer wall of the mounting bracket (408), a mounting shaft (5) disposed on the outer wall of the mounting bracket (408), a connecting plate (501) rotatably connected to the outer wall of the mounting shaft (5), the other end of the compression spring (502) being connected to the inner side of the connecting plate (501), and the self-locking rod (503) being fixedly connected to the upper end of the connecting plate (501).

8. The lathe for machining the inner wall of a tank nozzle according to claim 1, characterized in that: The movable block (602) is slidably connected to the groove (601).

9. The lathe for machining the inner wall of a tank nozzle according to claim 1, characterized in that: The upper end of the diagonal rod (604) is fixed with a mounting base (605), and the auxiliary wheel (606) is rotatably connected to the upper end of the mounting base (605).

10. The lathe for machining the inner wall of a tank nozzle according to claim 1, characterized in that: The auxiliary wheel (606) is located on both sides of the support wheel (405).

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