Intelligent boring device for pressure vessel machining

Abstract

The application relates to the technical field of intelligent manufacturing, and discloses an intelligent boring device for pressure container processing, which comprises a workbench, a three-axis moving mechanism fixedly installed on the workbench, a mounting seat fixedly installed on the three-axis moving mechanism, an electric chuck rotatably installed on the workbench, the electric chuck being used for fixing a container shell, and a boring mechanism and a cooling mechanism arranged in the mounting seat. The boring mechanism comprises a boring bar fixedly installed in the mounting seat, and the boring bar is fixedly installed with a boring cutter. The intelligent boring device for pressure container processing is provided with a multi-path cooling mechanism formed by a main pipeline and a plurality of branch pipelines with a smaller inner diameter than the main pipeline. The cooling liquid is injected into each region of the circumferential wall of the container shell from multiple points on the side wall through the branch pipelines and then injected into the middle region through the main pipeline, so that the boring processing region is subjected to differential cooling in stages.

Description

Technical Field

[0001] This invention relates to the field of intelligent manufacturing technology, specifically to an intelligent boring device for pressure vessel processing. Background Technology

[0002] As a type of pressure-bearing special equipment, the quality of the internal wall machining of pressure vessels directly affects the safe operation and service life of the equipment. Boring is a key process in the precision machining of the inner wall of pressure vessels. During boring, a large amount of cutting heat is generated in the contact area between the tool and the workpiece, which must be cooled in time with coolant; otherwise, it will lead to rapid tool wear and thermal deformation of the workpiece.

[0003] Existing boring machine cooling systems mostly employ a single-point coolant supply method, where coolant is delivered from a single pipe to the vicinity of the boring bar and then sprayed out. However, pressure vessel shells typically have large diameters and depths, and complex internal wall shapes. Under a single-point coolant supply method, it is difficult for the coolant to evenly cover the entire machining area. Areas farther from the supply port experience delayed coolant arrival and insufficient supply, leading to heat accumulation in these areas. This not only accelerates tool wear and reduces machining accuracy but may also cause thermally induced microcracks on the workpiece surface. Summary of the Invention

[0004] This invention provides an intelligent boring device for pressure vessel machining, which has the beneficial effect of ensuring the synchronization and flow consistency of the coolant supply at each outlet based on multi-point coolant supply, thus solving the problems mentioned in the background art.

[0005] The present invention provides the following technical solution: an intelligent boring device for pressure vessel processing, comprising a worktable, a three-axis moving mechanism fixedly mounted on the worktable, a mounting base fixedly mounted on the three-axis moving mechanism, an electric chuck rotatably mounted on the worktable, the electric chuck being used to fix the container shell, and a boring mechanism and a cooling mechanism being provided inside the mounting base; The boring mechanism includes a boring bar fixedly installed in the mounting base, and a boring tool fixedly installed on the boring bar. The cooling mechanism includes a main pipe and several branch pipe assemblies fixedly installed in the mounting base, and the boring bar passes through the main pipe. The branch pipeline assembly includes a first sealing groove formed on the main pipeline, a first sealing plate slidably installed in the first sealing groove, a connecting pipeline fixedly installed on the first sealing plate, a branch pipeline slidably installed on the connecting pipeline, the branch pipeline communicating with the side wall of the container shell through a flange, and the inner diameter of the branch pipeline being smaller than that of the main pipeline. The coolant is first injected into the side wall of the container shell through several branch pipes, and then injected into the middle of the container shell through the main pipe.

[0006] As an optional embodiment of the intelligent boring device for pressure vessel processing described in this invention, a first motor is fixedly installed on the worktable, the output shaft of the first motor is fixedly connected to the electric chuck, the boring bar is driven to insert into the container shell through the three-axis moving mechanism, and then the container shell is driven to rotate through the first motor to perform boring.

[0007] As an optional embodiment of the intelligent boring device for pressure vessel processing described in this invention, a valve assembly is provided inside the branch pipe. When the position of the branch pipe is adjusted according to the coolant inlet at different locations, the inner diameter of the branch pipe is adjusted by the valve assembly to regulate the flow rate of the coolant. The valve assembly includes a valve seat fixedly installed in the branch pipe, a first flow channel is provided on the valve seat, and a plurality of valve plates are slidably installed on the valve seat. The plurality of valve plates form a scalable retaining ring to control the channel size of the first flow channel.

[0008] As an optional embodiment of the intelligent boring device for pressure vessel processing described in this invention, the valve seat is provided with a regular hexagonal groove, and a number of valve plates are fixedly mounted with first guide blocks, and the number of first guide blocks are slidably connected to a number of sides of the regular hexagonal groove.

[0009] As an optional embodiment of the intelligent boring device for pressure vessel processing described in this invention, a turntable is rotatably installed inside the branch pipe, and a second flow channel adapted to the first flow channel is opened on the turntable; The turntable is also provided with several straight grooves, and several valve plates are fixedly installed with second guide blocks, which are slidably connected to several straight grooves respectively.

[0010] As an optional embodiment of the intelligent boring device for pressure vessel processing described in this invention, the branch pipeline assembly further includes an automatic adjustment component. When the distance between the outlet of the branch pipeline and the main pipeline increases, the automatic adjustment component controls the valve assembly to reduce the inner diameter of the branch pipeline to increase the flow rate of the coolant.

[0011] As an optional embodiment of the intelligent boring device for pressure vessel processing described in this invention, when the distance between the outlet of the branch pipe and the main pipe decreases, the valve assembly is controlled by the automatic adjustment component to increase the inner diameter of the branch pipe in order to reduce the flow rate of the coolant.

[0012] As an optional embodiment of the intelligent boring device for pressure vessel processing described in this invention, the automatic adjustment component includes a rocker arm fixedly installed on the turntable, the rocker arm having a sliding groove, a fixed rod fixedly installed on the main pipe, a sliding rod fixedly installed on the fixed rod, and the sliding rod slidably connected within the sliding groove.

[0013] As an optional embodiment of the intelligent boring device for pressure vessel processing described in this invention, a second sealing plate is fixedly installed on the rocker arm, a second sealing groove is provided on the branch pipe, and the second sealing plate is slidably connected in the second sealing groove.

[0014] As an optional embodiment of the intelligent boring device for pressure vessel processing described in this invention, wherein: an adjusting bolt is rotatably installed on the branch pipe, a threaded groove is opened on the connecting pipe, the adjusting bolt is threadedly connected to the threaded groove, and a ball valve is installed on the connecting pipe.

[0015] The present invention has the following beneficial effects: 1. The intelligent boring device for pressure vessel processing significantly increases the flow rate of coolant in the branch pipes by setting multiple branch pipes connected to the main pipe and with an inner diameter smaller than the main pipe in the mounting base, and preferentially sprays out synchronously from multiple points on the side wall of the vessel shell.

[0016] 2. This intelligent boring device for pressure vessel machining enables rapid and uniform cooling of each machining area of ​​the pressure vessel, avoiding remote cooling lag and cutting heat accumulation caused by single-point liquid supply, and reducing tool wear rate and workpiece thermal deformation risk.

[0017] 3. This intelligent boring device for pressure vessel processing combines multi-point liquid supply from multiple branch pipes with central liquid supply from the main pipe. This allows the coolant to first cool the side wall cutting area where heat is most concentrated, and then supplement the cooling of the central area. This forms a graded and differentiated supply mode that matches the heat distribution of the processing area, improving cooling efficiency and coolant utilization, and ensuring the stability of the processing accuracy of the inner wall of the pressure vessel. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the overall exploded structure of the present invention.

[0020] Figure 3 This is an exploded structural diagram of the three-axis moving mechanism in this invention.

[0021] Figure 4 This is a first cross-sectional view of the cooling mechanism in this invention.

[0022] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0023] Figure 6 This is a second cross-sectional view of the cooling mechanism in this invention.

[0024] Figure 7 for Figure 6 A magnified view of a section at point B.

[0025] Figure 8 This is a third cross-sectional view of the cooling mechanism in this invention.

[0026] Figure 9 This is an exploded view of the automatic adjustment component in this invention.

[0027] Figure 10 This is an exploded structural diagram of the valve assembly in this invention.

[0028] In the diagram: 1. Workbench; 2. Mounting base; 3. Electric chuck; 4. Container shell; 5. Boring bar; 6. Boring tool; 7. Main pipe; 8. First sealing groove; 9. First sealing plate; 10. Connecting pipe; 11. Branch pipe; 12. First motor; 13. Valve seat; 14. First flow channel; 15. Valve plate; 16. Regular hexagonal groove; 17. First guide block; 18. Turntable; 19. Second flow channel; 20. Straight groove; 21. Second guide block; 22. Rocker arm; 23. Slide groove ; 24. Fixed rod; 25. Slide rod; 26. Second sealing plate; 27. Second sealing groove; 28. Adjusting bolt; 29. ​​Threaded groove; 30. Ball valve; 31. First slide rail; 32. First slide block; 33. First drive device; 34. Second slide rail; 35. Second slide block; 36. Second drive device; 37. Third slide rail; 38. Third slide block; 39. Third drive device; 40. First lead screw; 41. First lead screw nut; 42. Second motor; 43. First transmission device. Detailed Implementation

[0029] 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.

[0030] Example 1, please refer to Figures 1-10A smart boring device for pressure vessel processing includes a worktable 1, a three-axis moving mechanism fixedly mounted on the worktable 1, a mounting base 2 fixedly mounted on the three-axis moving mechanism, an electric chuck 3 rotatably mounted on the worktable 1, the electric chuck 3 being used to fix the container shell 4, and a boring mechanism and a cooling mechanism being provided inside the mounting base 2.

[0031] The boring mechanism includes a boring bar 5 fixedly installed in the mounting base 2, and a boring tool 6 fixedly installed on the boring bar 5. The cooling mechanism includes a main pipe 7 fixedly installed in the mounting base 2 and several branch pipe assemblies, with the boring bar 5 passing through the main pipe 7.

[0032] The branch pipeline assembly includes a first sealing groove 8 opened on the main pipeline 7, a first sealing plate 9 slidably installed in the first sealing groove 8, a connecting pipeline 10 fixedly installed on the first sealing plate 9, a branch pipeline 11 slidably installed on the connecting pipeline 10, the branch pipeline 11 is connected to the side wall of the container shell 4 through a flange, and the inner diameter of the branch pipeline 11 is smaller than that of the main pipeline 7.

[0033] The coolant is first injected into the side wall of the container shell 4 through several branch pipes 11, and then injected into the middle of the container shell 4 through the main pipe 7.

[0034] A first motor 12 is fixedly installed on the worktable 1. The output shaft of the first motor 12 is fixedly connected to the electric chuck 3. The boring bar 5 is driven to be inserted into the container shell 4 through the three-axis moving mechanism. Then, the container shell 4 is driven to rotate through the first motor 12 to perform boring.

[0035] In this embodiment: Before the boring process begins, the operator first clamps the container shell 4 to be machined onto the electric chuck 3 and secures it reliably. Then, the three-axis moving mechanism is activated, driving the mounting base 2 and the boring bar 5 fixed thereon to move along the front-rear axis, the up-down axis, and the left-right axis, so that the boring bar 5 and its end-end boring tool 6 are precisely inserted into the container shell 4, and the boring tool 6 is aligned with the surface to be boring. After the boring tool 6 is in place, the first motor 12 is activated. The output shaft of the first motor 12 drives the electric chuck 3 and the container shell 4 fixed thereon to rotate around their own axis. During the rotation of the container shell 4, its three-axis moving mechanism synchronously controls the boring tool 6 to feed along a preset path, achieving precision boring of the inner wall of the container shell 4.

[0036] The boring bar 5 passes through the main pipe 7 of the cooling mechanism. The boring bar 5 is composed of multiple robotic arms and can be adjusted according to the required boring depth and angle at different positions on the inner wall of the container shell 4. The specific structure and working principle of the boring bar 5 are conventional technical means and will not be described in detail here.

[0037] While the boring process is underway, the cooling mechanism begins supplying coolant to the machining area. The coolant enters the main pipe 7 from an external supply source and propagates forward within it. When the coolant reaches the inlets of several branch pipe assemblies on the main pipe 7, because the inner diameter of the branch pipes 11 is smaller than that of the main pipe 7, according to the fluid continuity equation, under a constant flow rate, the fluid velocity is inversely proportional to the flow cross-sectional area. Therefore, the coolant velocity increases significantly after entering each branch pipe 11. The coolant is then rapidly transported via the connecting pipe 10 and the branch pipes 11 to multiple corresponding coolant inlets on the side wall of the container shell 4, and sprayed from these inlets onto the inner wall surface of the container shell 4, providing immediate cooling and lubrication to the boring area.

[0038] In the above process, the coolant preferentially cools the side walls of the container shell 4 through the branch pipes 11. These side wall areas are usually the main heat-affected zones of boring, where the cutting heat generated by the contact between the tool and the workpiece is concentrated. Cooling the side walls first can quickly remove the cutting heat, effectively reducing tool wear and workpiece thermal deformation. Subsequently, the coolant in the main pipe 7 continues to move forward and finally enters the central area of ​​the container shell 4 from the outlet of the main pipe 7 located around the boring bar 5, providing supplementary cooling and flushing chip removal to the machining area.

[0039] This staged supply method, where the coolant is first injected into the sidewalls via branch pipe 11 and then into the central section via main pipe 7, allows for differentiated coolant supply based on the heat distribution of the machining area—the sidewall cutting zone, where heat generation is most concentrated, receives priority cooling, while the central area, with relatively lower heat generation, receives supplementary cooling subsequently. This not only improves cooling efficiency but also avoids the impact and interference of a single large-flow coolant supply on the boring process. The coolant can be water-based or oil-based, depending on the material of the container shell 4 and the machining requirements.

[0040] It should be further explained that a multi-layered sealing structure can be used between the first sealing groove 8 and the first sealing plate 9, such as a combination of high-temperature resistant fluororubber rings and polytetrafluoroethylene retaining rings, to ensure that no leakage occurs during the high-pressure transportation of coolant.

[0041] Regarding the number of branch pipe assemblies shown in the figure, four are shown in this embodiment. The specific number can be determined according to the diameter of the container shell 4 and the cooling requirements. For example, for large-diameter containers, six or eight branch pipes 11 can be used to ensure the uniformity of circumferential cooling.

[0042] Example 2, please refer to Figures 1-10 A valve assembly is installed inside the branch pipe 11. When the position of the branch pipe 11 is adjusted according to the coolant inlet at different locations, the inner diameter of the branch pipe 11 is adjusted by the valve assembly to regulate the flow rate of the coolant.

[0043] The valve assembly includes a valve seat 13 fixedly installed in the branch pipe 11, a first flow channel 14 is provided on the valve seat 13, and several valve plates 15 are slidably installed on the valve seat 13. The channel size of the first flow channel 14 is controlled by the expansion and contraction of the several valve plates 15 forming a scalable retaining ring.

[0044] The valve seat 13 has a regular hexagonal groove 16, and a number of valve plates 15 are fixedly installed with first guide blocks 17. The number of first guide blocks 17 are slidably connected to a number of sides of the regular hexagonal groove 16.

[0045] A turntable 18 is rotatably installed inside the branch pipe 11, and a second flow channel 19 adapted to the first flow channel 14 is opened on the turntable 18.

[0046] The turntable 18 is also provided with several straight grooves 20, and several valve plates 15 are fixedly installed with second guide blocks 21. The several second guide blocks 21 are slidably connected in the several straight grooves 20 respectively.

[0047] The branch pipeline assembly also includes an automatic adjustment component. When the distance between the outlet of the branch pipeline 11 and the main pipeline 7 increases, the automatic adjustment component controls the valve assembly to reduce the inner diameter of the branch pipeline 11 to increase the flow rate of the coolant.

[0048] When the distance between the outlet of branch pipe 11 and the main pipe 7 decreases, the valve assembly controlled by the automatic adjustment component increases the inner diameter of branch pipe 11 to reduce the flow rate of coolant.

[0049] The automatic adjustment component includes a rocker arm 22 fixedly installed on the turntable 18, a groove 23 on the rocker arm 22, a fixed rod 24 fixedly installed on the main pipe 7, a slide rod 25 fixedly installed on the fixed rod 24, and the slide rod 25 slidably connected in the groove 23.

[0050] A second sealing plate 26 is fixedly installed on the rocker arm 22, and a second sealing groove 27 is opened on the branch pipe 11. The second sealing plate 26 is slidably connected in the second sealing groove 27.

[0051] In this embodiment: Based on embodiment one, this embodiment provides detailed definitions for the valve assembly and its automatic adjustment assembly within the branch pipe 11.

[0052] Regarding the structure and working principle of the valve assembly: The valve seat 13 is fixedly installed inside the branch pipe 11 near the outlet. Several valve plates 15, which are slidably installed on the left side of the valve seat 13, together form a scalable central retaining ring. Adjusting the size of this retaining ring is equivalent to adjusting the equivalent flow inner diameter of the branch pipe 11. The turntable 18 is rotatably installed on the valve seat 13 and maintains a good rotational seal. The center of the turntable 18 has a second flow channel 19 corresponding to the position of the first flow channel 14 on the valve seat 13. Several valve plates 15 are located between the second flow channel 19 and the first flow channel 14. The coolant flows out of the branch pipe 11 after passing through the central channel formed by the second flow channel 19, the valve plates 15, and the first flow channel 14 in sequence.

[0053] The valve assembly utilizes the principle of an iris mechanism to achieve stepless adjustment of the inner diameter. Taking six valve plates 15 as an example, a regular hexagonal groove 16 is provided at the left end of the valve seat 13. A first guide block 17 is fixedly installed at the right end of each valve plate 15. The six first guide blocks 17 are respectively slidably connected to the six sides of the regular hexagonal groove 16, so that the valve plate 15 can only slide back and forth along the radial direction of the regular hexagonal groove 16. A second guide block 21 is fixedly installed at the left end of each valve plate 15. Six straight grooves 20 are provided on the turntable 18, corresponding one-to-one with the six valve plates 15. These straight grooves 20 do not point radially to the center of the turntable 18, but are part of a vortex line at a certain angle to the radial direction. The six second guide blocks 21 are respectively slidably connected to the six straight grooves 20.

[0054] When the turntable 18 rotates relative to the valve seat 13, guided by the straight groove 20, the turntable 18 drives the six valve plates 15 to move circumferentially via the second guide block 21, thereby forcing all the first guide blocks 17 of the entire iris structure to synchronously move closer or further apart radially under the constraint of the regular hexagonal groove 16. The direct effect of this action is that the equivalent inner diameter of the central through hole, i.e., the branch pipe 11, formed by the ends of the six valve plates 15, will uniformly shrink or expand, thereby achieving precise regulation of the coolant flow rate in the branch pipe 11.

[0055] Regarding the linkage principle of the automatic adjustment component: This embodiment is equipped with an automatic adjustment component that enables automatic linkage adjustment between the effective delivery length of the branch pipe 11 and its equivalent inner diameter. When the distance between the outlet of the branch pipe 11 and the main pipe 7 increases, the automatic adjustment component controls the valve assembly to decrease the equivalent inner diameter of the branch pipe 11 to increase the coolant flow rate. Conversely, when the distance decreases, the automatic adjustment component controls the valve assembly to increase the equivalent inner diameter of the branch pipe 11 to decrease the coolant flow rate.

[0056] Specifically, the automatic adjustment component includes a rocker arm 22 fixedly mounted on the outer circumferential wall of the turntable 18. The rocker arm 22 extends radially outward along the branch pipe 11, and a long strip-shaped groove 23 extending along its length is formed on the rocker arm 22. At the same time, a fixing rod 24 is fixedly mounted on the outer wall of the main pipe 7, and a sliding rod 25 is fixed to the end of the fixing rod 24. The sliding rod 25 is slidably fitted into the groove 23 of the rocker arm 22.

[0057] Its working principle is as follows: When the operator needs to extend a branch pipe 11 outward, i.e., increase the effective delivery length of the branch pipe 11 to accommodate a coolant inlet with a larger diameter or a more distant location, the branch pipe 11 will slide outward relative to the main pipe 7, causing the rocker arm 22 fixed on the internal turntable 18 to move outward as well. Since the sliding rod 25 is fixed to the main pipe 7 by the fixing rod 24, its spatial position remains unchanged. Therefore, the sliding rod 25 slides relative to the rocker arm 22 in the groove 23, generating a circumferential turning torque on the rocker arm 22, driving the rocker arm 22 to swing. The rocker arm 22 drives the turntable 18 to rotate in one direction, for example, clockwise. This rotation direction, through the cooperation of the straight groove 20 and the second guide block 21, causes the six valve plates 15 to converge towards the center, effectively reducing the inner diameter. According to Bernoulli's principle, under the premise of a constant flow rate, the reduction in the flow cross-sectional area leads to an increase in fluid velocity, thereby compensating for the time delay and pressure loss caused by the increase in delivery distance.

[0058] Conversely, when the branch pipe 11 retracts inward to reduce the delivery distance, the rocker arm 22 is reversed, driving the turntable 18 to rotate in the opposite direction. The valve plate 15 expands outward, increasing its equivalent inner diameter and correspondingly reducing the coolant flow rate. Through this purely mechanical automatic linkage adjustment, the coolant in each branch pipe 11 can automatically obtain a flow rate matching its respective delivery distance, ensuring that the coolant sprayed from the outlets of different branch pipes 11 to the side walls of the container shell 4 arrives approximately simultaneously, achieving synchronicity and uniformity of coolant supply.

[0059] It should be noted that the iris mechanism is a mature existing technology, and its specific kinematic principle will not be elaborated here. Both the valve seat 13 and the turntable 18 can be designed as detachable modular components, which can be fixed in the branch pipe 11 by snap rings or threaded caps, so as to facilitate subsequent cleaning, maintenance or replacement of vulnerable parts such as valve plate 15.

[0060] Since the rocker arm 22 needs to pass through the wall of the branch pipe 11 and connect to the internal turntable 18, a reliable dynamic sealing structure is required between the rocker arm 22 and the wall of the branch pipe 11. Specifically, a second sealing plate 26 is fixedly fitted onto the rocker arm 22, and a second sealing groove 27 is provided at the corresponding position of the branch pipe 11. The second sealing plate 26 is slidably and sealingly embedded in the second sealing groove 27. A polytetrafluoroethylene (PTFE) sealing ring is also used here to ensure that coolant does not leak from this point when the rocker arm 22 reciprocates. The contact surfaces between the rocker arm 22 and the slide bar 25 are hardened to improve wear resistance and ensure the stability of linkage accuracy during long-term use.

[0061] Example 3, please refer to Figures 1-10 An adjusting bolt 28 is rotatably installed on the branch pipe 11, and a threaded groove 29 is opened on the connecting pipe 10. The adjusting bolt 28 is threadedly connected to the threaded groove 29, and a ball valve 30 is installed on the connecting pipe 10.

[0062] Specifically, the three-axis moving mechanism includes two parallel first slide rails 31 fixedly installed on the worktable 1, and first slide blocks 32 slidably installed on the two first slide rails 31. The worktable 1 is also provided with a first driving device 33 for driving the first slide blocks 32.

[0063] Two parallel second slide rails 34 are fixedly installed on the first slide block 32, and second slide blocks 35 are slidably installed on the two second slide rails 34. The first slide block 32 is also provided with a second driving device 36 for driving the second slide blocks 35.

[0064] Two parallel third slide rails 37 are fixedly installed on the second slide block 35, and a third slide block 38 is slidably installed on the two third slide rails 37. The mounting base 2 is fixedly installed on the third slide block 38. A third drive device 39 for driving the third slide block 38 is also provided on the second slide block 35.

[0065] The first driving device 33 includes a first lead screw 40 rotatably mounted on the worktable 1, a first lead screw nut 41 fixedly mounted on the first slide 32, the first lead screw nut 41 being threadedly connected to the first lead screw 40, and a second motor 42 fixedly mounted on the worktable 1. The output shaft of the second motor 42 is connected to the first lead screw 40 via the first transmission device 43.

[0066] The structures of the second drive unit 36 ​​and the third drive unit 39 are the same as those of the first drive unit 33.

[0067] In this embodiment: This embodiment further provides an implementation scheme for manual precision adjustment and flow balancing, and provides a detailed description of the specific drive structure of the three-axis moving mechanism.

[0068] Regarding the fine-tuning and locking of the branch pipe 11: An adjusting bolt 28 is rotatably mounted on the outer wall of the branch pipe 11 via a bearing. Correspondingly, a lug with a threaded groove 29 is fixedly mounted on the outer wall of the connecting pipe 10. The screw portion of the adjusting bolt 28 and the threaded groove 29 form a threaded drive engagement. By rotating the adjusting bolt 28 with a tool, since the position of the connecting pipe 10 is relatively fixed, the rotational motion of the thread is converted into a precise linear motion of the branch pipe 11 along its own axis. This adjustment method is more labor-saving and controllable than direct push and pull, and it can reliably maintain the position of the branch pipe 11 after adjustment by utilizing the self-locking characteristic of the thread, preventing it from accidentally shifting under high-pressure impact of coolant or equipment vibration.

[0069] To precisely control the flow rate of coolant exiting each branch pipe 11 and maintain a relatively consistent flow, a ball valve 30 is also installed on the connecting pipe 10 in this embodiment. The operator can manually fine-tune the opening of the ball valve 30 based on the actual cooling effect or data fed back from the flow sensors installed at each coolant inlet.

[0070] Regarding the specific drive structure of the three-axis moving mechanism: The three-axis moving mechanism includes two parallel first slide rails 31 fixedly mounted on the worktable 1, extending along the front-back and vertical axes. First slide blocks 32 are slidably mounted on the two first slide rails 31. The worktable 1 is also equipped with a first drive device 33 for driving the first slide blocks 32 to move along the vertical axis. The first drive device 33 includes a first lead screw 40 rotatably mounted on the worktable 1, a first lead nut 41 fixedly mounted on the first slide block 32, the first lead nut 41 being threadedly connected to the first lead screw 40, and a second motor 42 fixedly mounted on the worktable 1. The output shaft of the second motor 42 is connected to the first lead screw 40 via a first transmission device 43. The first transmission device 43 is preferably a belt drive consisting of two pulleys and a belt to achieve smooth speed and torque transmission.

[0071] Two parallel second slide rails 34 are fixedly mounted on the first slide block 32, and the two second slide rails 34 extend along the left-right axis. Second slide blocks 35 are slidably mounted on the two second slide rails 34. The first slide block 32 is also provided with a second drive device 36 for driving the second slide blocks 35 to move along the left-right axis. The second drive device 36 has the same structure as the first drive device 33, and also includes a lead screw, a lead nut, a motor, and a belt drive.

[0072] Two parallel third slide rails 37 are fixedly mounted on the second slide block 35, extending along the vertical and horizontal axes. A third slide block 38 is slidably mounted on the two third slide rails 37, and the mounting base 2 is fixedly mounted on the third slide block 38. The second slide block 35 also has a third drive device 39 for driving the third slide block 38 to move along the horizontal and vertical axes. The third drive device 39 has the same structure as the first drive device 33. It should be understood that the third drive device 39 can also be a direct screw drive instead of a belt drive to accommodate vertical load characteristics.

[0073] The working principle of the three-axis moving mechanism is as follows: The second motor 42 starts, and its output shaft drives the first lead screw 40 to rotate via the first transmission device 43. The rotational motion of the first lead screw 40 is converted into the linear motion of the first nut 41 and the first slide block 32 fixed thereon along the first slide rail 31. Similarly, the second drive device 36 drives the second slide block 35 to move left and right along the second slide rail 34, and the third drive device 39 drives the third slide block 38 to move up and down along the third slide rail 37. Through the coordinated movement of the three drive devices, the mounting base 2 and the boring bar 5 on it can be precisely positioned and fed in three-dimensional space.

[0074] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0075] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An intelligent boring device for pressure vessel machining, comprising a worktable (1), characterized in that: A three-axis moving mechanism is fixedly installed on the worktable (1), and a mounting base (2) is fixedly installed on the three-axis moving mechanism. An electric chuck (3) is rotatably installed on the worktable (1). The electric chuck (3) is used to fix the container shell (4). A boring mechanism and a cooling mechanism are provided inside the mounting base (2). The boring mechanism includes a boring bar (5) fixedly installed in the mounting base (2), and a boring tool (6) fixedly installed on the boring bar (5). The cooling mechanism includes a main pipe (7) fixedly installed in the mounting base (2) and several branch pipe assemblies. The boring bar (5) passes through the main pipe (7). The branch pipeline assembly includes a first sealing groove (8) opened on the main pipeline (7), a first sealing plate (9) slidably installed in the first sealing groove (8), a connecting pipe (10) fixedly installed on the first sealing plate (9), a branch pipe (11) slidably installed on the connecting pipe (10), the branch pipe (11) being connected to the side wall of the container shell (4) through a flange, and the inner diameter of the branch pipe (11) being smaller than that of the main pipeline (7). A valve assembly is provided inside the branch pipe (11). When the position of the branch pipe (11) is adjusted according to the coolant inlet at different locations, the inner diameter of the branch pipe (11) is adjusted by the valve assembly to regulate the flow rate of the coolant. The valve assembly includes a valve seat (13) fixedly installed inside the branch pipe (11). A first flow channel (14) is opened on the valve seat (13). Several valve plates (15) are slidably installed on the valve seat (13). The channel size of the first flow channel (14) is controlled by the expansion and contraction of the valve plates (15). A turntable (18) is rotatably installed inside the branch pipe (11), and a second flow channel (19) adapted to the first flow channel (14) is opened on the turntable (18). The turntable (18) is also provided with a number of straight grooves (20), and a number of valve plates (15) are fixedly installed with second guide blocks (21), and the number of second guide blocks (21) are slidably connected in the number of straight grooves (20); The branch pipe assembly also includes an automatic adjustment component. When the distance between the outlet of the branch pipe (11) and the main pipe (7) increases, the automatic adjustment component controls the valve assembly to reduce the inner diameter of the branch pipe (11) to increase the flow rate of the coolant. When the distance between the outlet of the branch pipe (11) and the main pipe (7) decreases, the automatic adjustment component controls the valve assembly to increase the inner diameter of the branch pipe (11) to decrease the flow rate of the coolant. The automatic adjustment component includes a rocker arm (22) fixedly installed on the turntable (18), a groove (23) is provided on the rocker arm (22), a fixed rod (24) is fixedly installed on the main pipe (7), a slide rod (25) is fixedly installed on the fixed rod (24), and the slide rod (25) is slidably connected in the groove (23).

2. The intelligent boring device for pressure vessel machining according to claim 1, characterized in that: A first motor (12) is fixedly installed on the worktable (1). The output shaft of the first motor (12) is fixedly connected to the electric chuck (3). The boring bar (5) is driven to be inserted into the container shell (4) by the three-axis moving mechanism. Then, the container shell (4) is driven to rotate by the first motor (12) to perform boring.

3. The intelligent boring device for pressure vessel machining according to claim 1, characterized in that: The valve seat (13) has a regular hexagonal groove (16), and a number of valve plates (15) are fixedly installed with first guide blocks (17), and the number of first guide blocks (17) are slidably connected to the six sides of the regular hexagonal groove (16).

4. The intelligent boring device for pressure vessel machining according to claim 1, characterized in that: A second sealing plate (26) is fixedly installed on the rocker arm (22), and a second sealing groove (27) is opened on the branch pipe (11). The second sealing plate (26) is slidably connected in the second sealing groove (27).

5. The intelligent boring device for pressure vessel machining according to claim 1, characterized in that: An adjusting bolt (28) is rotatably installed on the branch pipe (11), and a threaded groove (29) is opened on the connecting pipe (10). The adjusting bolt (28) is threadedly connected to the threaded groove (29), and a ball valve (30) is installed on the connecting pipe (10).

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