Thin-walled Revolving Body Vertical In-situ Machining System

Abstract

The present invention provides a vertical in-situ processing system for thin-walled rotating bodies, comprising a frame body, a hoisting fixture, an external pressure fixture, an internal support fixture for cylinder sections, an internal support fixture for the bottom of the box, and a processing device. A first platform, a second platform, and a third platform that can all be lifted are provided on the frame body. The hoisting fixture is detachably installed on the first platform. The external pressure fixtures are respectively arranged on the opposite surfaces of the second platform and the third platform. The processing device includes a machine head, a milling cutter, and a friction stir welding tool, and the milling cutter and the friction stir welding tool are selectively installed on the machine head. One of the opposite surfaces of the second platform and the third platform is provided with an annular guide rail, and the machine head is slidably installed on the annular guide rail, and a driving device is further included. The frame body is vertically arranged with a small floor area, and the rotating body always remains in an upright state, so the influence of gravity on the roundness of the rotating body is small, and there will be no problem that the cylinder section is deformed and it is difficult to butt welds. Moreover, the rotating body can be completed at one working station without changing the working station, and the operation is simpler and faster.

Description

Technical Field

[0001] The present invention relates to the technical field of large thin-walled rotating body processing, and more specifically, to a vertical in-situ processing system for thin-walled rotating bodies. Background Art

[0002] The fuel storage tanks of aerospace aircraft are mostly large thin-walled rotating body structures. As shown in Figure 1 , it mainly consists of a front bottom 1, a rear bottom 3 and several barrel sections 2. Among them, the front bottom 1 and the rear bottom 3 can be spherical structures, ellipsoidal structures or conical structures, and the barrel section 2 is a cylindrical structure. Adjacent two barrel sections 2 and between the barrel section 2 and the front bottom 1 or the rear bottom 3 need to be connected by welding. In the prior art, large thin-walled rotating body mechanisms usually adopt horizontal multi-station welding methods. When using the horizontal welding method, the equipment used needs to be horizontally arranged, and its length mostly exceeds 60m, occupying a large area; and because the storage tank is a thin-walled cylindrical structure, it is prone to deformation due to the action of gravity when placed horizontally, which easily leads to problems such as large butt joint difficulty, low welding accuracy, and poor welding quality; in addition, when using the horizontal welding method for processing, different stations need to be replaced to mill and weld the end faces of the barrel sections, so multiple clamping and disassembling are required, and the process is cumbersome and complex. Therefore, how to solve the problems of large equipment floor area, easy deformation of the storage tank and the need for multi-station processing in the prior art horizontal multi-station welding method is a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a thin-walled rotating body tightening device with a small floor area, which can keep the storage tank in an upright state during welding and does not require changing stations.

[0004] To solve the above problems, the present invention provides a vertical in-situ machining system for thin-walled rotating bodies, comprising: a frame body, on which a first platform, a second platform and a third platform are sequentially arranged from top to bottom and can all be lifted, and the first platform, the second platform and the third platform are all provided with avoidance holes for the rotating body to pass through; a hoisting fixture, which is used to fix the front bottom of the rotating body, and the hoisting fixture is detachably connected to the first platform; two external pressing fixtures, which are respectively arranged on the opposite end faces of the second platform and the third platform, and each external pressing fixture is used to press the outer side wall of the rotating body; an internal supporting fixture, which includes a cylinder section internal supporting fixture for supporting the inner wall of the cylinder section from the inside of the cylinder section, and a box bottom internal supporting fixture for supporting the inner wall of the rear bottom from the inside of the rear bottom of the rotating body; a machining device, which includes a machine head, a milling cutter and a friction stir welding tool, and either the milling cutter or the friction stir welding tool can be selectively installed on the machine head, the machine head is used to drive the milling cutter or the friction stir welding tool to rotate, one of the opposite end faces of the third platform and the second platform is provided with an annular guide rail, the machine head is slidably arranged on the annular guide rail, and further includes a driving device for driving the machine head to displace around the annular guide rail.

[0005] Preferably, the hoisting fixture includes a hoisting frame, the bottom of the hoisting frame is provided with a connecting ring for connecting with the end frame of the front bottom, the connecting ring is used to connect with the end frame of the front bottom through fasteners, the top of the hoisting frame is provided with a connecting rod, and the connecting rod is used to be detachably connected to the first platform through fasteners.

[0006] Preferably, each external pressing fixture includes a support, a swing arm, a pressing head and a first linear driving device. The number of supports is multiple, and the multiple supports are distributed along the circumferential direction of the cylinder section. The number of the swing arms, the pressing heads and the first linear driving devices is the same as that of the supports and corresponds one by one. The swing arm is hinged to the support, the pressing head is arranged at the first end of the swing arm to press the outer wall of the cylinder section, one end of the first linear driving device is hinged to the second end of the swing arm, and the other end is hinged to the support.

[0007] Preferably, the pressing head is an arc-shaped pressing head, and the arc diameter of its inner contour is the same as the outer peripheral wall diameter of the cylinder section. The pressing head is rotatably connected to the swing arm through a horizontal rotating shaft.

[0008] Preferably, the inner support fixture for the barrel section includes a first base, a support plate, a top block, a second linear drive device, and a third linear drive device. The height of the first base is adjustable. The number of the support plates is multiple, and the multiple support plates are arranged circumferentially on the first base for supporting the lower end surface of the barrel section. A first guiding mechanism is arranged on the first base in the vertical direction. The number of the first guiding mechanisms is the same as and corresponds one by one to the number of the support plates. The support plate is slidably arranged on the corresponding first guiding mechanism. The second linear drive device is used to drive the displacement of the support plate. The number of the top blocks is multiple. A second guiding mechanism is also arranged on the first base, which is the same as and corresponds one by one to the number of the top blocks. The multiple second guiding mechanisms are distributed circumferentially along the barrel section and extend radially along the barrel section respectively. The top block is slidably arranged on the second guiding mechanism. The third linear drive device is used to drive the displacement of the top block.

[0009] Preferably, the inner support fixture for the barrel section further includes a tightening ring in a ring structure. Each of the top blocks abuts against the inner wall of the tightening ring to tighten the inner wall of the barrel section through the tightening ring.

[0010] Preferably, the inner support fixture for the bottom of the box includes a second base, a center frame, and a tightening mechanism. The height of the second base is adjustable. A fourth linear drive device extending along the axial direction thereof is arranged on the center frame. The number of the tightening mechanisms is multiple, and the multiple tightening mechanisms are distributed circumferentially on the center frame. Each of the tightening mechanisms includes a support rod, a connecting rod, and a shaping block. The first section of the support rod can telescopically move relative to the second section of the support rod. The first section of the support rod is hinged to the center frame. One end of the connecting rod is hinged to the moving part of the fourth linear drive device, and the other end is hinged to the first section of the support rod, so that the fourth linear drive device drives the support rod to rotate around the hinge point between the support rod and the center frame through the connecting rod. The shaping block is arranged on the second section of the support rod, and the shaping block includes two arc-shaped blocks. The two arc-shaped blocks are respectively arranged on both sides of the support rod and are both hinged to the support rod. The tightening mechanism further includes a drive mechanism for driving the rotation of the arc-shaped blocks.

[0011] Preferably, the inner support fixture for the bottom of the box further includes an end frame support mechanism for supporting the end frame of the rear bottom. The number of the end frame support mechanisms is multiple, and the multiple end frame support mechanisms are distributed circumferentially along the rear bottom.

[0012] Preferably, the machine head is slidably connected to the annular guide rail through a machine head seat. A fourth guiding mechanism extending radially along the barrel section is arranged on the machine head seat. The machine head is slidably installed on the fourth guiding mechanism. It further includes a sixth linear drive device for driving the displacement of the machine head along the fourth guiding mechanism.

[0013] Preferably, it further includes a weld detection device and a resistance welding device, both of which are slidably arranged on the annular guide rail.

[0014] In the technical solution provided by the present invention, a vertical in-situ processing system for thin-walled rotating bodies includes a frame body, a lifting fixture, an external pressure fixture, an internal support fixture for cylinder sections, an internal support fixture for the bottom of the box, and a processing device. The frame body is provided with a first platform, a second platform, and a third platform that can all be lifted. The lifting fixture for fixing the front bottom of the rotating body is detachably installed on the first platform. The number of external pressure fixtures is two, and the two external pressure fixtures are respectively arranged on the opposite surfaces of the second platform and the third platform. The processing device includes a machine head, a milling cutter, and a friction stir welding head. The milling cutter and the friction stir welding head can be selectively installed on the machine head, and the machine head is used to drive the milling cutter or the friction stir welding head to rotate. One of the opposite surfaces of the second platform and the third platform is provided with an annular guide rail, and the machine head is slidably installed on the annular guide rail. It further includes a driving device for driving the machine head to slide along the annular guide rail.

[0015] During use, fix the front bottom to the lifting fixture, connect the lifting fixture to the first platform, then place a cylinder section to be welded on the internal support fixture for cylinder sections, move the internal support fixture for cylinder sections to the lower part of the first platform inside the frame body, loosen the internal support fixture for cylinder sections, and extend the internal support fixture for cylinder sections into the front bottom to tightly support the front bottom from the inside. Move the second platform to the outside of the front bottom, and make the external pressure fixture on the second platform press against the outer wall of the front bottom. Then install the milling cutter on the machine head and use the milling cutter to mill the entire lower end face of the front bottom. After milling the lower end face of the front bottom, loosen the internal support fixture for cylinder sections and the external pressure fixture on the second platform. Continue to use the internal support fixture for cylinder sections to tightly support the cylinder section to be welded, and make the external pressure fixture on the third platform press against the outer wall of the cylinder section. Use the milling cutter to mill the entire upper end face of the cylinder section. After milling the upper end face of the cylinder section, loosen the internal support fixture for cylinder sections and the external pressure fixture on the third platform. Align the lower end face of the front bottom with the upper end face of the cylinder section to be welded, and use the internal support fixture for cylinder sections to tightly support the joint of the front bottom and the cylinder section to be welded. Both external pressure fixtures press against the joint of the front bottom and the cylinder section to be welded from the outside. Remove the milling cutter on the machine head and replace it with a friction stir welding head to perform friction stir welding on the joint of the front bottom and the cylinder section to be welded. After welding the front bottom and the cylinder section to be welded, move the first platform upward, remove the internal support fixture for cylinder sections, install another cylinder section to be welded on the internal support fixture for cylinder sections and repeat the above process until all cylinder sections are welded. After the cylinder sections are welded, weld the rear bottom. The process of welding the rear bottom is similar to the process of welding the cylinder sections, except that the internal support fixture used is different. After the rear bottom is welded, remove the internal support fixture for the rear bottom, and then lift the lifting fixture and the welded rotating body together by crane to complete the entire processing process.

[0016] With such a setting, the frame is kept vertically, occupying a small floor area. Moreover, during the welding process, the rotating body always remains in an upright state, and the influence of gravity on the roundness of the rotating body is relatively small. There will be no problem that the deformation of the cylinder section caused by horizontal placement makes it difficult to butt welds. In addition, the milling of the end faces of the front bottom, cylinder section, and rear bottom, as well as welding, can all be completed at one station without changing the station, making the operation simpler and faster. In addition, when welding the cylinder section, front bottom, and rear bottom, etc., the inner support and outer pressure methods are used for fixation, which can effectively reduce the welding deformation of the rotating body and ensure the welding accuracy. By means of segment-by-segment welding, the production of rotating body structures with any length within the height range of the frame can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of a large thin-walled rotating body;

[0019] Figure 2 It is a schematic structural diagram of a thin-walled rotating body vertical in-situ processing system in an embodiment of the present invention;

[0020] Figure 3 For Figure 2 It is a schematic structural diagram of the frame of the thin-walled rotating body vertical in-situ processing system in;

[0021] Figure 4 For Figure 2 It is a schematic structural diagram of the lifting fixture of the thin-walled rotating body vertical in-situ processing system in;

[0022] Figure 5 For Figure 2 It is the installation state of the external pressure fixture on the second platform and the third platform of the thin-walled rotating body vertical in-situ processing system in;

[0023] Figure 6 For Figure 2 It is a schematic structural diagram of the cylinder section inner support fixture of the thin-walled rotating body vertical in-situ processing system in;

[0024] Figure 7 For Figure 6 It is a partial view of I in;

[0025] Figure 8 It is a schematic structural diagram of the external pressure fixture in an embodiment of the present invention;

[0026] Figure 9Schematic structural diagram of the inner support fixture for the box bottom in the embodiment of the present invention;

[0027] Figure 10 is Figure 9 Schematic structural diagram when the inner support fixture for the box bottom cooperates with the rear bottom;

[0028] Figure 11 Schematic diagram of the welding process of two components to be welded;

[0029] Figure 12 Schematic structural diagram of the end frame support mechanism in the embodiment of the present invention;

[0030] Figure 13 Schematic structural diagram of the arc-shaped block in the embodiment of the present invention;

[0031] Figure 14 Working state diagram of the weld detection device and the resistance welding device in the embodiment of the present invention.

[0032] Figures 1-14 Among them:

[0033] 1. Front bottom; 2. Cylindrical section; 3. Rear bottom; 4. Frame body; 5. First platform; 6. Second platform; 7. Third platform; 8. Machine head; 9. Connecting ring; 10. Connecting rod; 11. Support; 12. Swing arm; 13. Pressing head; 14. First base; 15. Support plate; 16. Top block; 17. Tightening ring; 18. Top head; 19. Second base; 20. Center frame; 21. Support rod; 22. Link; 23. Driving mechanism; 24. Arc-shaped block; 25. Fifth linear driving device; 26. Milling cutter; 27. Welding stirring head; 29. Guide rod; 30. Guide block; 31. Swing rod; 32. Shell; 33. Tightening mechanism; 34. Positioning pin; 35. Detection head; 36. Resistance welding head. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope protected by the present invention.

[0035] Hereinafter, the embodiments will be described in detail with reference to the drawings. In addition, the embodiments shown below do not limit the content of the invention described in the claims in any way. Additionally, all the content shown in the following embodiments is not limited to what is necessary for the solution of the invention described in the claims.

[0036] Refer to Figures 1-14As shown, a thin-walled rotating body vertical in-situ processing system provided in an embodiment of the present invention includes a frame 4, a lifting fixture, an external pressure fixture, an internal support fixture and a processing device. Among them, the frame 4 can be a truss structure formed by welding, and the frame 4 is provided with a first platform 5, a second platform 6 and a third platform 7 which are arranged in sequence from top to bottom and can be lifted and lowered, and the first platform 5, the second platform 6 and the third platform 7 are all provided with avoidance holes for the rotating body to pass through. For example, the frame 4 is provided with a guide rail arranged in the vertical direction, and the first platform 5, the second platform 6 and the third platform 7 are slidably arranged on the guide rail of the frame 4 through a slider, and the first platform 5, the second platform 6 and the third platform 7 can be driven to lift and lower respectively by means of a lead screw nut. Taking the first platform 5 as an example, a rotatable lead screw is provided on the frame 4, and the lead screw is driven by a servo motor. A nut for cooperating with the lead screw thread is provided on the first platform 5, and the lifting and lowering of the first platform 5 can be controlled by controlling the servo motor. The second platform 6 and the third platform 7 are the same. Reference Figure 2 As shown, one side of the frame is provided with an opening to facilitate loading and unloading of workpieces. Figure 2 , 3 As shown, the first platform 5, the second platform 6 and the third platform 7 can all be annular structures, and the annuli thereof constitute the above-mentioned avoidance hole. The lifting fixture is used to fix the front bottom 1 of the rotating body, and the lifting fixture is detachably connected to the first platform 5. Figure 5 As shown, there are two external pressure clamps, which are respectively arranged on the opposite end faces of the second platform 6 and the third platform 7, and each external pressure clamp is used to press the outer side of the rotating body. The internal support clamp includes a barrel section internal support clamp for supporting the inner wall of the barrel section 2 from the inside of the barrel section 2, and a box bottom internal support clamp for supporting the inner wall of the rear bottom 3 from the inside of the rear bottom 3 of the rotating body.

[0037] Among them, the processing device includes a machine head 8, a milling cutter 26 and a welding stirring head 27. Either the milling cutter 26 or the welding stirring head 27 can be selectively installed on the machine head 8, and the machine head 8 is used to drive the milling cutter 26 or the welding stirring head 27 to rotate. For example, the machine head 8 is provided with a rotatable main shaft and a driving motor connected to the main shaft, and the driving motor can be connected to the main shaft through a coupling or a reducer to drive the main shaft to rotate. The milling cutter 26 or the welding stirring head 27 can be installed on the main shaft through a tool holder in the prior art to rotate with the main shaft. The rotation of the milling cutter 26 can perform milling processing, and the rotation of the welding stirring head 27 can perform stir friction welding processing. One of the end faces opposite to the third platform 7 and the second platform 6 is provided with an annular guide rail, and the annular guide rail is coaxially arranged with the rotating body. Reference Figure 2As shown in the figure, the annular guide rail is arranged on the third platform 7. The machine head 8 is slidably arranged on the annular guide rail. The thin-walled rotary body vertical in-situ machining system further includes a driving device for driving the machine head 8 to displace around the annular guide rail. For example, the driving device may include an annular rack coaxially arranged with the annular guide rail, a gear meshing with the annular rack, and a motor drivingly connected to the gear. The rack is also fixedly arranged on the third platform 7, the motor can be fixed to the machine head 8, the gear can be key-connected to the output shaft of the motor, and the motor drives the gear to mesh with the rack, thereby driving the machine head 8 to displace along the annular guide rail.

[0038] During use, fix the front bottom 1 to the lifting fixture, connect the lifting fixture to the first platform 5, then place a cylinder section 2 to be welded on the cylinder section internal support fixture, and move the cylinder section internal support fixture to below the first platform 5 inside the frame 4. As Figure 11 shown in the first picture from the left in the figure, loosen the cylinder section internal support fixture, extend the cylinder section internal support fixture into the front bottom 1, tightly support the front bottom 1 from the inside, move the second platform 6 to the outside of the front bottom 1, and make the external pressure fixture on the second platform 6 press against the outer wall of the front bottom 1. Then install the milling cutter 26 on the machine head 8, and use the milling cutter 26 to mill the entire lower end face of the front bottom 1. After milling the lower end face of the front bottom 1, loosen the cylinder section internal support fixture and the external pressure fixture on the second platform 6. As Figure 11 shown in the second picture from the left in the figure, use the cylinder section internal support fixture to tightly support the cylinder section 2 to be welded again, and make the external pressure fixture on the third platform 7 press against the outer wall of the cylinder section 2. Use the milling cutter 26 to mill the entire upper end face of the cylinder section 2. After milling the upper end face of the cylinder section 2, loosen the cylinder section internal support fixture and the external pressure fixture on the third platform 7. Refer to Figure 11 shown in the third picture from the left in the figure, align the lower end face of the front bottom 1 and the upper end face of the cylinder section 2 to be welded, and use the cylinder section internal support fixture to tightly support the joint of the front bottom 1 and the cylinder section 2 to be welded. Both external pressure fixtures are pressed against the position near the joint of the front bottom 1 and the cylinder section 2 to be welded from the outside. Refer to Figure 11 shown in the fourth picture from the left in the figure, remove the milling cutter 26 on the machine head 8 and replace it with a friction stir welding head 27, and perform friction stir welding on the joint seam of the front bottom 1 and the cylinder section 2 to be welded. After welding the front bottom 1 and the cylinder section 2 to be welded, move the first platform 5 upward, remove the cylinder section internal support fixture, then install another cylinder section 2 to be welded on the cylinder section internal support fixture and repeat the above process until all cylinder sections 2 are welded. After welding the cylinder section 2, weld the rear bottom 3. The welding process of the rear bottom 3 is similar to that of the cylinder section 2 except for the different internal support fixtures used, so it will not be elaborated here. After welding the rear bottom 3, remove the rear bottom internal support fixture, and then lift out the lifting fixture and the welded rotary body together by crane to complete the entire machining process.

[0039] With such a setting, the frame body 4 is kept vertically arranged, occupying a small floor area and saving space. Moreover, during the welding process, the rotating body always remains in an upright state, and the influence of gravity on the roundness of the rotating body is relatively small, and problems such as difficult butt welding of the deformed cylinder section 2 caused by horizontal placement will not occur. The milling end faces and friction stir welding of the front bottom 1, the cylinder section 2, and the rear bottom 3 can all be completed at one station without changing the station, and the operation is simpler and faster, avoiding the problem of assembly errors easily generated by multiple clamping. In addition, when welding the cylinder section 2, the front bottom 1, the rear bottom 3, etc., an internal support and external pressure method is used for fixation, which can effectively reduce the welding deformation of the rotating body and ensure the welding accuracy. By means of segment-by-segment welding, the production of a rotating body structure with any length within the height range of the frame body 4 can be realized, enabling the thin-walled rotating body vertical in-situ processing system to process products of various specifications and having a wider application range.

[0040] Refer to Figure 4 As shown, in some embodiments, the lifting fixture includes a lifting frame, which can be welded by profiles or the like. A connecting ring 9 for connecting with the end frame of the front bottom 1 is provided at the bottom of the lifting frame, and the connecting ring 9 can be connected with the end frame of the front bottom 1 through fasteners. Refer to Figure 1 As shown, the end frame of the front bottom 1 is also a ring structure, and through holes are provided on the end frame of the front bottom 1. When it is necessary to fix the front bottom 1 to the lifting fixture, first align the connecting ring 9 of the lifting frame with the end frame of the front bottom 1, and then fix the connecting ring 9 and the end frame of the front bottom 1 with bolts, which is simple and convenient and has a stable connection. A connecting rod 10 is provided at the top of the lifting frame, and the connecting rod 10 is detachably connected to the first platform 5 through fasteners. Refer to Figure 2 As shown, the connecting rod 10 can be placed on the first platform 5 and can be connected and fixed to the first platform 5 by screws. During use, first fix the front bottom 1 to the connecting ring 9, and then use a crane to lift the lifting fixture onto the first platform 5 for installation.

[0041] Refer to Figure 5 、 8As shown, in some embodiments, each external pressure fixture includes a support 11, a swing arm 12, a pressure head 13, and a first linear drive device. Each external pressure fixture includes a plurality of supports 11, and the plurality of supports 11 are circumferentially distributed along the circumferential direction of the cylinder section 2. The number of swing arms 12, pressure heads 13, and first linear drive devices is the same as that of the supports 11 and they correspond one by one. The swing arm 12 is hinged to the support 11, and the pressure head 13 is disposed at the first end of the swing arm 12 for pressing against the outer wall of the cylinder section 2. One end of the first linear drive device is hinged to the second end of the swing arm 12, and the other end is hinged to the support 11. When the first linear drive device expands and contracts, it can drive the swing arm 12 to rotate around the hinge point between the swing arm 12 and the support 11. For example, when the first linear drive device extends, the swing arm 12 can drive the pressure head 13 to press against the outer wall of the rotating body. When the first linear drive device contracts, the swing arm 12 can drive the pressure head 13 to move away from the outer wall of the rotating body. Optionally, the first linear drive device can be a cylinder or an electric cylinder.

[0042] Reference Figure 8 As shown, the pressure head 13 is an arc-shaped pressure head 13, and the arc diameter of its inner contour is the same as the outer diameter of the outer peripheral wall of the cylinder section 2, so that the pressure head 13 can better fit the outer peripheral wall of the rotating body. The pressure head 13 is rotatably connected to the swing arm 12 through a horizontal rotating shaft. With such a setting, even if there are installation errors, etc., the pressure head 13 can always adaptively fit the outer peripheral wall of the rotating body when pressing against the outer peripheral wall of the rotating body, thereby providing a better pressing effect.

[0043] Reference Figures 6-7 As shown, in some embodiments, the inner support fixture of the cylinder section includes a first base 14, a support plate 15, a top block 16, a second linear drive device, and a third linear drive device. The height of the first base 14 is adjustable. Reference Figure 6 As shown, the first base 14 includes two upper and lower parts connected by a plurality of vertical rods. Optionally, the vertical rods are fixedly connected to the lower part of the first base 14 and slidably connected to the upper part of the first base 14, so that the upper part of the first base 14 can move up and down. A motor and a lead screw drivingly connected to the motor can be provided on the lower part of the first base 14, and a nut threadedly engaged with the lead screw can be provided on the upper part of the first base 14, so as to drive the upper part of the first base 14 to rise and fall in the form of a lead screw and nut, so as to achieve the effect of adjustable height of the first base 14.

[0044] There are multiple support plates 15, and the multiple support plates 15 are arranged along the circumferential direction of the first base for supporting the lower end surface of the cylinder section 2. A first guiding mechanism arranged vertically is provided on the first base 14. The number of the first guiding mechanisms is the same as and corresponds one by one to the number of the support plates 15. The support plates 15 are slidably arranged on the corresponding first guiding mechanisms. For example, the first guiding mechanism can be a guide rail, and the support plates 15 are slidably mounted on the guide rail through sliders. The second linear driving device is used to drive the displacement of the support plates 15. For example, the second linear driving device can be a cylinder or an electric cylinder. Optionally, the number of the second linear driving devices is the same as and corresponds one by one to the number of the support plates 15. By arranging the support plates 15, on the one hand, it can play a role in supporting the cylinder section 2; on the other hand, as shown in Figure 11 During the welding process of two cylinder sections 2 or the front bottom 1 and the cylinder section 2, by adjusting the lowering of the support plates 15, the pressing blocks of the inner support fixture of the cylinder section can protrude from the upper end surface of the lower cylinder section 2, and then the first support 11 is raised, so that the pressing blocks can enter the upper cylinder section 2 or the front bottom 1 to be tightened, so as to facilitate milling the lower end surface of the upper cylinder section 2 or the lower end surface of the front bottom 1.

[0045] As shown in Figure 7 , there are multiple top blocks 16, and a second guiding mechanism with the same number as and corresponding one by one to the top blocks 16 is further provided on the first base 14. The multiple second guiding mechanisms are distributed along the circumferential direction of the cylinder section 2 and respectively extend along the radial direction of the cylinder section 2. The top blocks 16 are slidably arranged on the second guiding mechanisms. For example, the second guiding mechanism is a guide rail, and the top blocks 16 are provided with guide grooves slidably matched with the guide rail. The third linear driving device is used to drive the displacement of the top blocks 16. The third linear driving device can be a cylinder or an electric cylinder. As shown in Figure 7 , the housing of the third linear driving device is hinged to the first base 14, and the movable part of the third linear driving device is hinged to the top block 16 to push the top block 16 to displace along the second guiding mechanism.

[0046] In order to ensure the roundness of the supported cylinder section 2, in some embodiments, the inner support fixture of the cylinder section further includes a tightening ring 17 in a ring structure, and each top block 16 abuts against the inner wall of the tightening ring 17. With such an arrangement, during the tightening process, the third linear driving device pushes the top blocks 16, and each top block 16 presses against the inner wall of the tightening ring 17, so that the tightening ring 17 expands and tightens the cylinder section 2, that is, the cylinder section 2 is tightened from the inside by using the deformation of the tightening ring 17. In this way, it can avoid the problem that the roundness of the cylinder section 2 is poor when it is tightened due to the asynchronous operation of each third linear driving device or installation errors, etc., and ensure the roundness of the tightened cylinder section 2.

[0047] Optionally, a top head 18 is provided at the front end of each top block 16. A third guiding mechanism extending in the vertical direction is provided on the top block 16, and the top head 18 is slidably arranged on the third guiding mechanism. For example, the third guiding mechanism is a vertically arranged guide rail, and a guide groove slidably engaged with the guide rail is provided on the top head 18. Each top block 16 is connected to the tightening ring 17 through the corresponding top head 18. Since each top head 18 can be displaced up and down along the top block 16, the inner support fixture of the cylinder section can adjust the tightening position of the cylinder section 2 in the vertical direction.

[0048] Reference Figures 9-10 As shown in the figure, in some embodiments, the inner support fixture of the bottom of the box includes a second base 19, a central frame 20 and a tightening mechanism. The height of the second base 19 is adjustable. The specific setting form of the second base 19 can refer to the above-mentioned first base 14, and the two have the same structure and will not be described in detail.

[0049] Reference Figure 10 As shown in the figure, a fourth linear driving device extending along its axis is provided on the central frame 20. The number of tightening mechanisms is multiple, and the multiple tightening mechanisms are circumferentially distributed along the central frame 20. Each tightening mechanism includes a support rod 21, a connecting rod 22 and a sizing block. The connecting rod 22 and the sizing block correspond to the support rod 21 one by one. The first section of the support rod can extend and retract relative to the second section of the support rod. For example, the first section of the support rod is slidably connected to the second section of the support rod, and a cylinder is provided on the first section of the support rod, and the piston rod of the cylinder is connected to the second section of the support rod to drive the second section of the support rod to displace relative to the first section of the support rod. The first section of the support rod 21 is hinged to the central frame 20, one end of the connecting rod 22 is hinged to the moving part of the fourth linear driving device, and the other end is hinged to the first section of the support rod 21, so that the fourth linear driving device drives the support rod 21 to rotate around the hinge point between the support rod 21 and the central frame 20 through the connecting rod 22. For example, the fourth linear driving device can be a screw lift, an electric cylinder or a cylinder. Its push rod or piston rod constitutes the moving part of the above-mentioned fourth linear driving device. When the fourth linear driving device expands and contracts, it can drive the support rod 21 to rotate around the hinge point between the support rod 21 and the central frame 20 through the connecting rod 22. For example, when the fourth linear driving device extends, the support rod 21 is in a horizontal state, and then the support rod is controlled to extend to tighten the inner wall of the rear bottom 3; when the fourth linear driving device retracts, the support rod 21 is in a vertical state to reduce the radial dimension of the inner support fixture of the bottom of the box, facilitating the removal of the inner support fixture of the bottom of the box from the welded rotating body structure.

[0050] Reference Figure 13As shown in the figure, the sizing block is arranged at one end of the second section of the support rod 21 away from the center frame, and each sizing block includes two arc blocks 24. The two arc blocks 24 are respectively arranged on both sides of the support rod 21 and are respectively hinged to the support rod 21. The tightening mechanism further includes a driving mechanism 23 for driving the rotation of the arc block. The number of the driving mechanisms 23 is the same as that of the arc blocks and they are in one-to-one correspondence. For example, the driving mechanism 23 can be a cylinder or an electric cylinder. Sliding grooves are provided on the arc blocks, and each driving mechanism 23 is hinged to the second section of the support rod at one end and is slidably mounted in the sliding groove of the corresponding arc block through a pin shaft. Refer to Figure 13 As shown in the figure, when the driving mechanism 23 extends, it can cause the arc blocks to open to tighten the inner wall of the rear bottom; when the driving mechanism shortens, the arc blocks are closed so that when the support rod rotates to the vertical retracted state, adjacent arc blocks will not interfere.

[0051] Refer to Figure 10 As shown in the figure, in order to improve the stiffness of the tightening mechanism, in some embodiments, the tightening mechanism further includes a fifth linear driving device 25. One end of the fifth linear driving device 25 is hinged to the center frame 20, and the other end is hinged to a sliding seat, and the sliding seat is slidably arranged in a slideway arranged along the axial direction of the support rod 21. The fifth linear driving device can be a cylinder. During the rotation of the support rod, the fifth linear driving device can maintain a follow-up state. When the support rod is in the horizontal state, the fifth linear driving device is cut off and locked to enable the fifth linear driving device to provide a supporting force for the support rod, improve the stiffness of the support rod, and increase the stability when the support rod is tightened.

[0052] In some embodiments, the inner support fixture of the bottom of the box further includes an end frame support mechanism for supporting the end frame of the rear bottom 3. The number of the end frame support mechanisms is multiple, and the multiple end frame support mechanisms are distributed along the circumferential direction of the rear bottom 3. Optionally, the end frame support mechanism can adopt the same structure as the support plate 15 in the inner support fixture of the cylinder section to support and adjust the height of the rear bottom 3. Of course, the end frame support mechanism can also adopt the structure as Figure 12 shown in the figure. It may include a housing 32, a guide rod 29 rotatably connected to the housing 32, a guide block 30 threadedly engaged with the guide rod 29, a swing rod 31 rotatably connected to the middle of the housing 32, a positioning pin 34 and a tightening mechanism 33. A guide groove that is slidably engaged with the guide block 30 and can prevent the guide block 30 from rotating is further provided in the housing 32. When the guide rod 29 rotates, it can drive the guide block 30 to displace along the guide groove. A groove for the lower end of the swing rod 31 to extend into is provided on the guide block 30. The upper end of the swing rod 31 is used to support the end frame of the rear bottom 3. When the guide block 30 displaces, it can drive the lower end of the swing rod 31 to displace, so that the swing rod 31 rotates, so that the upper end of the swing rod 31 jacks up or lowers the end frame of the rear bottom 3. A positioning pin 34 for cooperating with a through hole on the end frame of the rear bottom 3 is further provided on the housing 32 to position the circumference of the rear bottom 3. The tightening mechanism 33 is used to tighten from the outside of the end frame of the rear bottom 3.

[0053] In some embodiments, the machine head 8 is slidably connected to the annular guide rail through the machine head seat. That is, the machine head is arranged on the machine head seat, the machine head seat is arranged on the annular guide rail, the motor for driving the gear is installed on the machine head seat, and when the motor drives the gear to rotate, the machine head seat can be driven to slide along the annular guide rail. The machine head seat is provided with a fourth guide mechanism extending radially along the barrel section 2, and the machine head 8 can be slidably mounted on the fourth guide mechanism. For example, the fourth guide mechanism is a guide rail, and the machine head 8 is provided with a guide groove that slidably cooperates with the guide rail. It also includes a sixth linear drive device for driving the machine head 8 to move along the fourth guide mechanism. For example, the sixth linear drive device includes a servo motor, a lead screw connected to the servo motor in transmission, and a nut threadedly cooperated with the lead screw. The servo motor is fixed to the machine head seat, the nut is connected to the machine head 8, and the lead screw can be rotated to drive the machine head 8 to move along the fourth guide mechanism. With such arrangement, the machine head 8 can feed radially along the rotating body, so that the thin-walled rotating body vertical in-situ machining system can machine rotating bodies of different diameters, thereby increasing the application range of the thin-walled rotating body vertical in-situ machining system.

[0054] In some embodiments, the thin-walled rotating body vertical in-situ processing system also includes a weld detection device and a resistance welding device, and both the weld detection device and the resistance welding device can be slidably arranged on the annular guide rail. It should be noted that the weld detection device and the resistance welding device are both prior arts, and their structural principles are not described in detail. Both the welding detection device and the resistance welding device can be connected to the machine head 8, so as to move along the annular guide rail together with the machine head 8. Of course, the welding machine detection device and the resistance welding device can also be respectively provided with the same driving device as the machine head 8 and operate independently. Reference Figure 14 As shown, by setting up a welding detection device, the detection head 35 of the welding detection device can detect the weld after the welding of the welding stirring head 27 is completed, and record the position of the welding defect, and then use the resistance welding head 36 of the resistance welding device to repair the weld at the defective position to eliminate the defects of the weld.

[0055] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vertical in-situ machining system for thin-walled rotating bodies, characterized in that, Comprising: A frame body (4) is provided with a first platform (5), a second platform (6) and a third platform (7) which are arranged in sequence from top to bottom and can all be lifted, and the first platform (5), the second platform (6) and the third platform (7) are all provided with avoidance holes for a rotating body to pass through; A hoisting fixture is used to fix the front bottom (1) of the rotating body, and the hoisting fixture is detachably connected to the first platform (5). The hoisting fixture includes a hoisting frame. A connecting ring (9) for connecting with the end frame of the front bottom (1) is provided at the bottom of the hoisting frame. The connecting ring (9) is used to connect with the end frame of the front bottom (1) through a fastener. A connecting rod (10) is provided at the top of the hoisting frame. The connecting rod (10) is used to be detachably connected to the first platform (5) through a fastener; External pressure fixtures, the number of which is two. The two external pressure fixtures are respectively arranged on the opposite end faces of the second platform (6) and the third platform (7). Each external pressure fixture is used to press the outer side wall of the rotating body. Each external pressure fixture includes a support (11), a swing arm (12), a pressing head (13) and a first linear driving device. The swing arm (12) is hinged to the support (11). The pressing head (13) is arranged at the first end of the swing arm (12) to press the outer wall of the cylinder section (2). One end of the first linear driving device is hinged to the second end of the swing arm (12), and the other end is hinged to the support (11); An internal support fixture includes a cylinder section internal support fixture for supporting the inner wall of the cylinder section (2) from the inside of the cylinder section (2), and a box bottom internal support fixture for supporting the inner wall of the rear bottom (3) from the inside of the rear bottom (3) of the rotating body; the cylinder section internal support fixture includes a first base (14), a support plate (15), a top block (16), a second linear driving device and a third linear driving device. The height of the first base (14) is adjustable. The number of the support plates (15) is multiple. The multiple support plates (15) are arranged along the circumferential direction of the first base (14) to support the lower end face of the cylinder section (2). A first guiding mechanism arranged in the vertical direction is provided on the first base (14). The number of the first guiding mechanisms is the same as and corresponds to the number of the support plates (15) one by one. The support plate (15) is slidably arranged on the corresponding first guiding mechanism. The second linear driving device is used to drive the displacement of the support plate (15); The inner support fixture for the bottom of the box includes a second base (19), a center frame (20), and a tightening mechanism. The height of the second base (19) is adjustable. A fourth linear driving device extending along its axial direction is provided on the center frame (20). The number of the tightening mechanisms is multiple, and the multiple tightening mechanisms are circumferentially distributed along the center frame (20). Each tightening mechanism includes a support rod (21), a connecting rod (22), and a shape-correcting block. The first section of the support rod (21) is telescopic relative to the second section of the support rod (21). The first section of the support rod (21) is hinged to the center frame. One end of the connecting rod (22) is hinged to the moving part of the fourth linear driving device, and the other end is hinged to the first section of the support rod (21), so that the fourth linear driving device drives the support rod (21) to rotate around the hinge point between the support rod (21) and the center frame through the connecting rod (22). The shape-correcting block is arranged on the second section of the support rod (21), and the shape-correcting block includes two arc-shaped blocks (24). The two arc-shaped blocks (24) are respectively arranged on both sides of the support rod (21) and are both hinged to the support rod (21). The tightening mechanism further includes a driving mechanism (23) for driving the arc-shaped block (24) to rotate. The number of the driving mechanisms (23) is the same as and corresponds one-to-one to the number of the arc-shaped blocks (24). A chute is arranged on each arc-shaped block (24). One end of each driving mechanism (23) is hinged to the second section of the support rod (21), and the other end is slidably installed in the chute of the corresponding arc-shaped block (24) through a pin shaft. The driving mechanism (23) is a cylinder or an electric cylinder. The inner support fixture for the bottom of the box further includes an end frame support mechanism for supporting the end frame of the rear bottom (3). The number of the end frame support mechanisms is multiple, and the multiple end frame support mechanisms are circumferentially distributed along the rear bottom (3). The processing device includes a machine head (8), a milling cutter (26), and a friction stir welding tool (27). Either the milling cutter (26) or the friction stir welding tool (27) is selectively installed on the machine head (8). The machine head (8) is used to drive the milling cutter (26) or the friction stir welding tool (27) to rotate. An annular guide rail is provided on one of the end faces of the third platform (7) opposite to the second platform (6). The machine head (8) is slidably arranged on the annular guide rail, and a driving device for driving the machine head (8) to displace around the annular guide rail is further included.

2. The thin-walled rotary body vertical in-situ machining system according to claim 1, wherein The number of the supports (11) is multiple, and the multiple supports (11) are circumferentially distributed along the cylindrical section (2). The number of the swing arms (12), the number of the pressing heads (13), and the number of the first linear driving devices are the same as and correspond one-to-one to the number of the supports (11).

3. The thin-walled rotary body vertical in-situ machining system according to claim 2, wherein The pressing head (13) is an arc-shaped pressing head (13), and the arc diameter of its inner contour is the same as the outer diameter of the outer peripheral wall of the cylindrical section (2). The pressing head (13) is rotatably connected to the swing arm (12) through a horizontal rotating shaft.

4. The thin-walled rotating body vertical in-situ machining system according to claim 1, wherein The number of the top blocks (16) is multiple, and the first base (14) is further provided with a second guiding mechanism which has the same number as and corresponds one by one to the top blocks (16). The multiple second guiding mechanisms are distributed along the circumferential direction of the cylinder section (2) and respectively extend along the radial direction of the cylinder section (2). The top blocks (16) are slidably arranged on the second guiding mechanisms, and the third linear driving device is used for driving the displacement of the top blocks (16).

5. The thin-walled rotary body vertical in-situ machining system according to claim 4, characterized in that, The cylinder section internal support fixture further includes a tightening ring (17) in a ring structure, and each of the top blocks (16) abuts against the inner wall of the tightening ring (17) to tighten the inner wall of the cylinder section through the tightening ring (17).

6. The thin-walled rotary body vertical in-situ machining system according to claim 1, wherein The machine head (8) is slidably connected to the annular guide rail through a machine head seat. The machine head seat is provided with a fourth guiding mechanism extending along the radial direction of the cylinder section (2). The machine head (8) is slidably installed on the fourth guiding mechanism, and further includes a sixth linear driving device for driving the machine head (8) to displace along the fourth guiding mechanism.

7. The thin-walled rotary body vertical in-situ machining system according to claim 1, characterized in that It further includes a weld detection device and a resistance welding device, and both the weld detection device and the resistance welding device are slidably arranged on the annular guide rail.

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