Rapid clamping and welding device for narrow-interval circumferential weld thin-wall cylinder

Abstract

A rapid clamping and welding device for narrow-spacing circumferential weld thin-wall cylinders belongs to the technical field of aero-engine part manufacturing and comprises a supporting assembly, a pneumatic tensioning driving assembly, a tensioning execution assembly, a part radial pressing mechanism and a part axial pressing mechanism. The pneumatic tensioning driving assembly is arranged in the center of the supporting assembly; the tensioning execution assembly is arranged between the supporting assembly and the pneumatic tensioning driving assembly; the part radial pressing mechanism is arranged below the supporting assembly. The part axial pressing mechanism is arranged on the tensioning execution assembly. A manual tensioning link is abandoned, the tensioning and positioning requirements of a plurality of narrow-interval circumferential welds on the part can be met only through one device, time and labor are saved, the part clamping efficiency is improved, quick and stable clamping of the part before welding is achieved, and the device has the advantages of being short in clamping time, controllable in tensioning amount and uniform in tensioning gap. And after being welded, the parts are high in coaxiality and low in deformation, the machining and welding quality is improved, and the stability of the machining and welding quality of the parts is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of manufacturing parts of aeroengines, and particularly relates to a rapid clamping and welding device for a thin-walled cylinder body with narrow-spacing circumferential welds. Background Art

[0002] For large-sized thin-walled cylinder body parts in aeroengines, due to restrictions in structure, size, assembly requirements, and processing equipment conditions, a processing technology of segmented processing and multi-pass circumferential weld butt welding is currently required.

[0003] Due to the weak rigidity of the thin-walled cylinder body, in order to ensure the pre-welding assembly requirements of the parts, an internal expansion fixture with a manually rotated cam expansion flap structure is currently usually used to expand and limit the position of the weld.

[0004] However, when the thin-walled cylinder body is butt-welded with multiple narrow-spacing circumferential welds, since the weld spacing is small and the diameter size of the cylinder body is large, when using an internal expansion fixture with a manually rotated cam expansion flap structure, multiple sets of fixtures are required for multiple manual rotation and tightening clamps. Not only is the clamping efficiency low, but also the multi-pass clamping process is likely to result in difficulty in ensuring the post-weld coaxiality between multiple segments of the thin-walled cylinder body, thereby leading to unstable processing and welding quality of the thin-walled cylinder body with narrow-spacing circumferential welds. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the invention provides a rapid clamping and welding device for a thin-walled cylinder body with narrow-spacing circumferential welds, which abandons the manual tightening link, avoids interference of human factors, and only one set of device can meet the requirements of expanding and positioning multiple narrow-spacing circumferential welds on the parts. It not only saves time and effort, but also can improve the clamping efficiency of the parts. It not only realizes rapid and stable clamping before part welding, but also has the characteristics of short clamping time, controllable expansion amount, and uniform expansion gap. It is easier to ensure the post-weld coaxiality between multiple segments of the thin-walled cylinder body, effectively reduces the welding deformation amount of the parts, improves the processing and welding quality of the thin-walled cylinder body parts with narrow-spacing circumferential welds, and further improves the stability of the processing and welding quality of the parts.

[0006] To achieve the above object, the invention adopts the following technical scheme: A rapid clamping and welding device for a thin-walled cylinder body with narrow-spacing circumferential welds includes a support assembly, a pneumatic expansion driving assembly, an expansion execution assembly, a part radial pressing mechanism, and a part axial pressing mechanism; the pneumatic expansion driving assembly is arranged at the center of the support assembly; the expansion execution assembly is arranged between the support assembly and the pneumatic expansion driving assembly; the part radial pressing mechanism is arranged below the support assembly, and the number of the part radial pressing mechanisms is several, and several part radial pressing mechanisms are evenly distributed along the circumferential direction; the part axial pressing mechanism is arranged on the expansion execution assembly, and the number of the part axial pressing mechanisms is several, and several part axial pressing mechanisms are evenly distributed along the circumferential direction.

[0007] The support assembly includes a lower base plate, a base support cylinder, an upper base plate, a part positioning support plate, a support vertical plate, and a part tensioning support plate; the base support cylinder is coaxially and fixedly installed on the upper surface of the lower base plate; the upper base plate is coaxially and fixedly installed at the top end of the base support cylinder; the part positioning support plate is coaxially and fixedly installed on the upper surface of the upper base plate; the part radial pressing mechanism is arranged at the edge of the upper base plate; the support vertical plate is fixedly installed on the upper surface of the part positioning support plate, and the number of support vertical plates is several, and several support vertical plates are evenly distributed along the circumferential direction; the part tensioning support plate is fixedly installed at the top end of the support vertical plate, and the part tensioning support plate and the part positioning support plate are coaxially distributed.

[0008] The number of the part tensioning support plates is at least two, and an interval support block is fixedly installed between adjacent part tensioning support plates. The number of interval support blocks is several, and several interval support blocks are evenly distributed along the circumferential direction, and all part tensioning support plates are coaxially distributed.

[0009] The pneumatic tensioning drive assembly includes a cylinder, a transmission shaft, a transfer cylinder seat, a guide sleeve, an ear seat sleeve, and a transmission connecting rod; the upper mounting edge of the transfer cylinder seat is fixedly connected to the central mounting hole of the upper base plate, and the transfer cylinder seat and the upper base plate are coaxially distributed; the cylinder is fixedly connected to the lower mounting edge of the transfer cylinder seat, the cylinder and the transfer cylinder seat are coaxially distributed, and the piston rod of the cylinder is vertically upward; the guide sleeve is coaxially and fixedly installed on the upper surface of the upper mounting edge of the transfer cylinder seat; the transmission shaft is vertically arranged, the lower end of the transmission shaft is coaxially screwed and fixed to the top end of the piston rod of the cylinder, and a transmission shaft limit nut is fixedly arranged between the transmission shaft and the piston rod of the cylinder; the guide sleeve is coaxially sleeved outside the transmission shaft, a friction reduction lubricating sleeve is arranged in the circumferential gap between the guide sleeve and the transmission shaft, and a friction reduction lubricating cover is fixedly installed on the transmission shaft below the friction reduction lubricating sleeve; the ear seat sleeve is located above the guide sleeve, and the ear seat sleeve is coaxially and fixedly sleeved on the transmission shaft; the inner end of the transmission connecting rod is hinged to the ear seat sleeve, and the outer end of the transmission connecting rod is connected to the tensioning execution assembly.

[0010] The number of the ear seat sleeves is at least two, an interval support sleeve is arranged between adjacent ear seat sleeves, and an ear seat sleeve pressing nut is fixedly arranged on the transmission shaft above the topmost ear seat sleeve; several transmission connecting rods are arranged on each ear seat sleeve, and several transmission connecting rods are evenly distributed along the circumferential direction; a guide cage is coaxially arranged outside the transmission shaft, the lower end of the guide cage is fixedly connected to the upper mounting edge of the transfer cylinder seat, a friction reduction lubricating guide hole is provided at the center of the upper end plate of the guide cage, and the transmission shaft is inserted through the friction reduction lubricating guide hole; a protective cover is fixedly installed on the upper surface of the upper end plate of the guide cage above the friction reduction lubricating guide hole.

[0011] The tensioning actuator assembly includes an active tensioning flap, an active slide rail, an active slider, a driven tensioning flap, a driven slide rail and a driven slider; the active slide rail adopts a parallel double-track structure, the active slide rail is fixedly mounted on the upper surface of the part tensioning support plate, there are a number of active slide rails, and the several active slide rails are evenly distributed along the circumferential direction; the driven slide rail adopts a parallel double-track structure, the driven slide rail is fixedly mounted on the upper surface of the part tensioning support plate, there are a number of driven slide rails, and the several driven slide rails are evenly distributed along the circumferential direction; the active slide rail and the driven slide rail are alternately arranged in the circumferential direction; the active slider is slidably connected to the active slide rail, and the active tensioning flap is fixedly connected to the active slider; the driven slider is slidably connected to the driven slide rail, and the driven tensioning flap is fixedly connected to the driven slider.

[0012] A protective gas channel is provided inside the active expansion flap, and a part active expansion pad is fixedly installed on the outer edge of the active expansion flap. The part expansion surface of the part active expansion pad is an arc surface, and an active expansion flap protective gas containing groove is provided on the part expansion surface along the arc direction. Active expansion flap protective gas spray holes are evenly distributed on the bottom of the active expansion flap protective gas containing groove along the arc direction, and the active expansion flap protective gas spray holes are connected to the protective gas channel inside the active expansion flap.

[0013] A protective air channel is provided inside the driven expansion flap, a part driven expansion pad is fixedly installed on the outer edge of the driven expansion flap, the part expansion surface of the part driven expansion pad is an arc surface, a driven expansion flap protective air containing groove is provided on the part expansion surface along the arc direction, driven expansion flap protective air spray holes are evenly distributed on the bottom of the driven expansion flap protective air containing groove along the arc direction, and the driven expansion flap protective air spray holes are connected to the protective air channel inside the driven expansion flap.

[0014] A transmission pull rod is arranged between the adjacent active tensioning petal and the driven tensioning petal, one end of the transmission pull rod is fixedly connected to the active tensioning petal, and the other end of the transmission pull rod is fixedly connected to a pull pin; a pull pin limiting slide groove is opened on the driven tensioning petal, and the transmission pull rod is transmission-connected to the pull pin limiting slide groove through the pull pin; a return spring is connected between the driven tensioning petal and the part tensioning support plate, one end of the return spring is fixedly connected to the part tensioning support plate, and the other end of the return spring is fixedly connected to the driven tensioning petal.

[0015] Beneficial effects of the present invention: The rapid clamping and welding device for thin-walled cylinders with narrow-spacing circumferential welds of the present invention abandons the manual tensioning link, avoiding interference from human factors. Only one set of device is required to meet the tensioning and positioning needs of multiple narrow-spacing circumferential welds on the part, which not only saves time and effort, but also improves the part clamping efficiency. It not only realizes the rapid and stable clamping before part welding, but also has the characteristics of short clamping time, controllable tensioning amount, and uniform tensioning gap. It is easier to ensure the post-weld coaxiality between multiple segments of the thin-walled cylinder, effectively reducing the welding deformation amount of the part and improving the processing and welding quality of the thin-walled cylinder part with narrow-spacing circumferential welds. Moreover, the stability of the processing and welding quality of the part is further improved. Brief Description of the Drawings

[0016] Figure 1 FIG. is a schematic diagram of the overall structure of a rapid clamping and welding device for a thin-walled cylinder with narrow-spacing circumferential welds of the present invention (with a part clamped and fixed); Figure 2 FIG. is a schematic diagram of the overall structure of a rapid clamping and welding device for a thin-walled cylinder with narrow-spacing circumferential welds of the present invention (without a part clamped and fixed); Figure 3 FIG. is a sectional structure schematic diagram of a rapid clamping and welding device for a thin-walled cylinder with narrow-spacing circumferential welds of the present invention (without a part clamped and fixed); Figure 4 FIG. is a sectional structure schematic diagram of the support component of the present invention; Figure 5 FIG. is a schematic diagram of the overall structure of the pneumatic tensioning drive component of the present invention; Figure 6 FIG. is a sectional structure schematic diagram of the pneumatic tensioning drive component of the present invention; Figure 7 FIG. is a schematic diagram of the overall structure of the tensioning execution component of the present invention; Figure 8 FIG. is a partial structure schematic diagram of the tensioning execution component of the present invention; In the figure, 1 is the part radial pressing mechanism, 2 is the part axial pressing mechanism, 3 is the lower base plate, 4 is the base support cylinder, 5 is the upper base plate, 6 is the part positioning support plate, 7 is the support vertical plate, 8 is the part tensioning support plate, 9 is the spacer support block, 10 is the air cylinder, 11 is the transmission shaft, 12 is the adapter cylinder base, 13 is the guide sleeve, 14 is the ear seat sleeve, 15 is the transmission connecting rod, 16 is the transmission shaft limit nut, 17 is the antifriction lubricating sleeve, 18 is the antifriction lubricating cover, 19 is the spacer support sleeve, 20 is the ear seat sleeve pressing nut, 21 is the guide cage, 22 is the antifriction lubricating guide hole, 23 is the protective cover, 24 is the active tensioning flap, 25 is the active slide rail, 26 is the active slider, 27 is the driven tensioning flap, 28 is the driven slide rail, 29 is the driven slider, 30 is the part active tensioning pad, 31 is the active tensioning flap protection air accommodation groove, 32 is the part driven tensioning pad, 33 is the driven tensioning flap protection air accommodation groove, 34 is the transmission pull rod, 35 is the pull pin limit chute, 36 is the return spring, 37 is the first section of the cylinder body, 38 is the second section of the cylinder body, 39 is the third section of the cylinder body, 40 is the fourth section of the cylinder body. Detailed implementation mode

[0017] The following further elaborates on the present invention in conjunction with the accompanying drawings and specific embodiments.

[0018] As Figures 1 to 8 shown, a rapid clamping and welding device for a thin-walled cylinder body with narrow-spacing circumferential welds includes a support assembly, a pneumatic tensioning drive assembly, a tensioning execution assembly, a part radial pressing mechanism 1, and a part axial pressing mechanism 2; the pneumatic tensioning drive assembly is arranged at the center of the support assembly; the tensioning execution assembly is arranged between the support assembly and the pneumatic tensioning drive assembly; the part radial pressing mechanism 1 is arranged below the support assembly, and the number of the part radial pressing mechanisms 1 is several, and several part radial pressing mechanisms 1 are evenly distributed along the circumferential direction; the part axial pressing mechanism 2 is arranged on the tensioning execution assembly, and the number of the part axial pressing mechanisms 2 is several, and several part axial pressing mechanisms 2 are evenly distributed along the circumferential direction.

[0019] The support assembly includes a lower base plate 3, a base support cylinder 4, an upper base plate 5, a part positioning support plate 6, a support vertical plate 7, and a part tensioning support plate 8; the base support cylinder 4 is coaxially and fixedly installed on the upper surface of the lower base plate 3; the upper base plate 5 is coaxially and fixedly installed at the top of the base support cylinder 4; the part positioning support plate 6 is coaxially and fixedly installed on the upper surface of the upper base plate 5; the part radial pressing mechanism 1 is arranged at the edge of the upper base plate 5; the support vertical plate 7 is fixedly installed on the upper surface of the part positioning support plate 6, and the number of the support vertical plates 7 is several, and several support vertical plates 7 are evenly distributed along the circumferential direction; the part tensioning support plate 8 is fixedly installed at the top of the support vertical plate 7, and the part tensioning support plate 8 is coaxially distributed with the part positioning support plate 6.

[0020] The number of the part tensioning support plates 8 is at least two, and an interval support block 9 is fixedly installed between adjacent part tensioning support plates 8. The number of the interval support blocks 9 is several, and the several interval support blocks 9 are evenly distributed along the circumferential direction. All the part tensioning support plates 8 are coaxially distributed.

[0021] The pneumatic tensioning drive assembly includes a cylinder 10, a transmission shaft 11, an adapter cylinder base 12, a guide sleeve 13, an ear seat sleeve 14 and a transmission link 15. The upper mounting edge of the adapter cylinder base 12 is fixedly connected to the central mounting hole of the upper base plate 5, and the adapter cylinder base 12 and the upper base plate 5 are coaxially distributed. The cylinder 10 is fixedly connected to the lower mounting edge of the adapter cylinder base 12, the cylinder 10 and the adapter cylinder base 12 are coaxially distributed, and the piston rod of the cylinder 10 is vertically upward. The guide sleeve 13 is coaxially and fixedly installed on the upper surface of the upper mounting edge of the adapter cylinder base 12. The transmission shaft 11 is vertically arranged, and the lower end of the transmission shaft 11 is coaxially screwed and fixed to the top end of the piston rod of the cylinder 10. A transmission shaft limit nut 16 is fixedly arranged between the transmission shaft 11 and the piston rod of the cylinder 10. The guide sleeve 13 is coaxially sleeved outside the transmission shaft 11, and an anti-friction lubricating sleeve 17 is arranged in the circumferential gap between the guide sleeve 13 and the transmission shaft 11. An anti-friction lubricating cover 18 is fixedly installed on the transmission shaft 11 below the anti-friction lubricating sleeve 17. The ear seat sleeve 14 is located above the guide sleeve 13, and the ear seat sleeve 14 is coaxially and fixedly sleeved on the transmission shaft 11. The inner end of the transmission link 15 is hinged to the ear seat sleeve 14, and the outer end of the transmission link 15 is connected to the tensioning execution assembly.

[0022] The number of the ear seat sleeves 14 is at least two, and an interval support sleeve 19 is arranged between adjacent ear seat sleeves 14. An ear seat sleeve pressing nut 20 is fixedly arranged on the transmission shaft 11 above the topmost ear seat sleeve 14. Each ear seat sleeve 14 is provided with several transmission links 15, and the several transmission links 15 are evenly distributed along the circumferential direction. A guide cage 21 is coaxially arranged outside the transmission shaft 11. The lower end of the guide cage 21 is fixedly connected to the upper mounting edge of the adapter cylinder base 12. A friction-reducing lubricating guide hole 22 is arranged at the center of the upper end plate of the guide cage 21, and the transmission shaft 11 is inserted through the friction-reducing lubricating guide hole 22. A protective cover 23 is fixedly installed on the upper surface of the upper end plate of the guide cage 21 above the friction-reducing lubricating guide hole 22.

[0023] The tensioning actuator assembly includes an active tensioning flap 24, an active slide rail 25, an active slider 26, a driven tensioning flap 27, a driven slide rail 28 and a driven slider 29; the active slide rail 25 adopts a parallel double-track structure, the active slide rail 25 is fixedly mounted on the upper surface of the part tensioning support plate 8, there are a number of active slide rails 25, and the several active slide rails 25 are evenly distributed along the circumferential direction; the driven slide rail 28 adopts a parallel double-track structure, the driven slide rail 28 is fixedly mounted on the upper surface of the part tensioning support plate 8, there are a number of driven slide rails 28, and the several driven slide rails 28 are evenly distributed along the circumferential direction; the active slide rail 25 and the driven slide rail 28 are alternately arranged in the circumferential direction; the active slider 26 is slidably connected to the active slide rail 25, the active tensioning flap 24 is fixedly connected to the active slider 26; the driven slider 29 is slidably connected to the driven slide rail 28, and the driven tensioning flap 27 is fixedly connected to the driven slider 29.

[0024] A protective gas channel is opened inside the active tensioning flap 24, and a part active tensioning pad 30 is fixedly installed on the outer edge of the active tensioning flap 24. The part tensioning surface of the part active tensioning pad 30 is an arc surface, and an active tensioning flap protective gas containing groove 31 is opened on the part tensioning surface along the arc direction. Active tensioning flap protective gas spray holes are evenly distributed on the bottom of the active tensioning flap protective gas containing groove 31 along the arc direction, and the active tensioning flap protective gas spray holes are connected to the protective gas channel inside the active tensioning flap 24.

[0025] A protective gas channel is opened inside the driven expansion flap 27, and a part driven expansion pad 32 is fixedly installed on the outer edge of the driven expansion flap 27. The part expansion surface of the part driven expansion pad 32 is an arc surface, and a driven expansion flap protective gas receiving groove 33 is opened on the part expansion surface along the arc direction. Driven expansion flap protective gas spray holes are evenly distributed on the bottom of the driven expansion flap protective gas receiving groove 33 along the arc direction, and the driven expansion flap protective gas spray holes are connected to the protective gas channel inside the driven expansion flap 27.

[0026] A transmission rod 34 is arranged between the adjacent active tensioning flap 24 and the driven tensioning flap 27, one end of the transmission rod 34 is fixedly connected to the active tensioning flap, and the other end of the transmission rod 34 is fixedly connected to a pull pin; a pull pin limiting groove 35 is opened on the driven tensioning flap 27, and the transmission rod 34 is transmission-connected to the pull pin limiting groove 35 through the pull pin; a return spring 36 is connected between the driven tensioning flap 27 and the part tensioning support plate 8, one end of the return spring 36 is fixedly connected to the part tensioning support plate 8, and the other end of the return spring 36 is fixedly connected to the driven tensioning flap 27.

[0027] The following describes a one-time use process of the present invention in conjunction with the accompanying drawings: In this embodiment, the thin-walled cylinder part with narrow-gap circumferential welds is divided into four sections before welding. From top to bottom, they are cylinder section 1 37, cylinder section 2 38, cylinder section 3 39, and cylinder section 4 40. There are a total of three circumferential welds. Among them, the circumferential welds between cylinder section 2 38 and cylinder section 1 37 and cylinder section 3 39 form narrow-gap circumferential welds, and these two circumferential welds share a set of tensioning execution components; the number of part tensioning support plates 8 is two; the number of ear seat sleeves 14 is two, and three transmission connecting rods 15 are evenly distributed along the circumferential direction on each ear seat sleeve 14; the number of active tensioning petals 24 and passive tensioning petals 27 is three each; the number of part radial pressing mechanisms 1 is eight; the number of part axial pressing mechanisms 2 is six.

[0028] First, hoist the rapid clamping and welding device for thin-walled cylinders with narrow-gap circumferential welds of the present invention onto the tooling table of the automatic welding robot system, and then center and fix the lower base plate 3 to the tooling table of the automatic welding robot system.

[0029] After the device is installed, first connect the pneumatic control pipeline of the air cylinder 10, and then connect the protective gas source to the protective gas channels inside the active tensioning petal 24 and the passive tensioning petal 27 through the supply pipeline.

[0030] After the pneumatic control pipeline of the air cylinder 10 and the supply pipeline of the protective gas are installed, first place the cylinder section 4 40 on the part positioning support plate 6, then complete the centering and fixing of the cylinder section 4 40 through the part radial pressing mechanism 1, and then sequentially place the cylinder section 3 39, cylinder section 2 38, and cylinder section 1 37 on the cylinder section 4 40.

[0031] Before welding, it is necessary to first tension the thin-walled cylinder part with narrow-gap circumferential welds. At this time, start the air cylinder 10, control the piston rod of the air cylinder 10 to retract downward, drive the ear seat sleeve 14 to move downward synchronously through the piston rod, and then push the active tensioning petal 24 to move through the transmission connecting rod 15, so that the part active tensioning pad 30 on the active tensioning petal 24 abuts against the back of the circumferential weld. During the movement of the active tensioning petal 24, the part passive tensioning pad 32 on the passive tensioning petal 27 will be driven to abut against the back of the circumferential weld synchronously through the transmission pull rod 34 and the pull pin. Finally, the thin-walled cylinder part with narrow-gap circumferential welds is tensioned and fixed along the circumferential direction. At this time, the return spring 36 is in a stretched state and stores elastic potential energy. Then, complete the pressing and fixing of the cylinder section 1 37 through the part axial pressing mechanism 2, so as to complete the tensioning and fixing of the thin-walled cylinder part with narrow-gap circumferential welds.

[0032] After the thin-walled cylinder part with narrow-spacing circumferential welds is tightened and fixed, turn on the protective gas source. Deliver the protective gas through the gas supply pipeline to the back of the circumferential weld from the protective gas spray holes of the active tensioning petals on the active tensioning pad 30 of the part and the protective gas spray holes of the driven tensioning petals on the driven tensioning pad 32 of the part respectively, and protect the back of the circumferential weld through the protective gas. Then start the automatic welding robot, and the automatic welding robot completes the automatic welding of the circumferential weld. During the automatic welding process, no manual intervention is required, and only the flow rate of the protective gas needs to be appropriately adjusted according to the welding requirements during the welding process.

[0033] After the thin-walled cylinder part with narrow-spacing circumferential welds is welded, it is necessary to continue delivering the protective gas for a period of time. After the temperature at the circumferential weld drops to room temperature, turn off the protective gas. At the same time, control the piston rod of the cylinder 10 to extend upward, drive the ear seat sleeve 14 to move upward synchronously through the piston rod, and then pull the active tensioning petal 24 back through the transmission connecting rod 15, so that the active tensioning petal 24 is disengaged from the tensioned state. During the retraction process of the active tensioning petal 24, the return spring 36 releases elastic potential energy, and pulls the driven tensioning petal 27 back to the initial position through the retraction of the return spring 36, and at the same time makes the driven tensioning petal 27 disengaged from the tensioned state.

[0034] After the thin-walled cylinder part with narrow-spacing circumferential welds that has been welded is disengaged from the tensioned state, the pressing states of the part radial pressing mechanism 1 and the part axial pressing mechanism 2 can be released, and then the thin-walled cylinder part with narrow-spacing circumferential welds can be unloaded.

[0035] The solutions in the embodiments are not intended to limit the protection scope of the present invention. Any equivalent implementation or change without departing from the present invention is included in the protection scope of the present invention.

Claims

1. A rapid clamping and welding device for a thin-walled cylinder with narrow-gap circumferential welds, characterized in that: It includes a support component, a pneumatic tension driving component, a tension execution component, a part radial pressing mechanism, and a part axial pressing mechanism; the pneumatic tension driving component is arranged at the center of the support component; the tension execution component is arranged between the support component and the pneumatic tension driving component; the part radial pressing mechanism is arranged below the support component, and the number of the part radial pressing mechanisms is several, and several part radial pressing mechanisms are evenly distributed along the circumferential direction; the part axial pressing mechanism is arranged on the tension execution component, and the number of the part axial pressing mechanisms is several, and several part axial pressing mechanisms are evenly distributed along the circumferential direction.

2. The rapid clamping and welding device for a thin-walled cylinder with narrow-gap circumferential welds according to claim 1, characterized in that: The support component includes a lower base plate, a base support cylinder, an upper base plate, a part positioning support plate, a support vertical plate, and a part tension support plate; the base support cylinder is coaxially and fixedly installed on the upper surface of the lower base plate; the upper base plate is coaxially and fixedly installed at the top of the base support cylinder; the part positioning support plate is coaxially and fixedly installed on the upper surface of the upper base plate; the part radial pressing mechanism is arranged at the edge of the upper base plate; the support vertical plate is fixedly installed on the upper surface of the part positioning support plate, and the number of the support vertical plates is several, and several support vertical plates are evenly distributed along the circumferential direction; the part tension support plate is fixedly installed at the top of the support vertical plate, and the part tension support plate and the part positioning support plate are coaxially distributed.

3. The rapid clamping and welding device for a thin-walled cylinder with narrow-gap circumferential welds according to claim 2, wherein: The number of the part tension support plates is at least two, and an interval support block is fixedly installed between adjacent part tension support plates. The number of the interval support blocks is several, and several interval support blocks are evenly distributed along the circumferential direction, and all the part tension support plates are coaxially distributed.

4. A rapid clamping and welding device for a thin-walled cylinder with narrow-gap circumferential welds according to claim 2, characterized in that: The pneumatic tension driving component includes a cylinder, a transmission shaft, a transfer cylinder seat, a guide sleeve, an ear seat sleeve, and a transmission connecting rod; the upper installation edge of the transfer cylinder seat is fixedly connected with the central installation hole of the upper base plate, and the transfer cylinder seat and the upper base plate are coaxially distributed; the cylinder is fixedly connected with the lower installation edge of the transfer cylinder seat, the cylinder and the transfer cylinder seat are coaxially distributed, and the piston rod of the cylinder is vertically upward; the guide sleeve is coaxially and fixedly installed on the upper surface of the upper installation edge of the transfer cylinder seat; the transmission shaft is vertically arranged, the lower end of the transmission shaft is coaxially screwed and fixed with the top end of the piston rod of the cylinder, and a transmission shaft limit nut is fixedly arranged between the transmission shaft and the piston rod of the cylinder; the guide sleeve is coaxially sleeved outside the transmission shaft, a friction reducing lubricating sleeve is arranged in the circumferential gap between the guide sleeve and the transmission shaft, and a friction reducing lubricating cover is fixedly installed on the transmission shaft below the friction reducing lubricating sleeve; the ear seat sleeve is located above the guide sleeve, and the ear seat sleeve is coaxially and fixedly sleeved on the transmission shaft; the inner end of the transmission connecting rod is hinged on the ear seat sleeve, and the outer end of the transmission connecting rod is connected to the tension execution component.

5. The rapid clamping and welding device for a thin-walled cylinder with narrow-spacing circumferential welds according to claim 4, characterized in that: The number of the ear seat sleeves is at least two, an interval support sleeve is arranged between adjacent ear seat sleeves, and an ear seat sleeve pressing nut is fixedly arranged on the transmission shaft above the topmost ear seat sleeve; a plurality of transmission connecting rods are arranged on each ear seat sleeve, and the plurality of transmission connecting rods are uniformly distributed along the circumferential direction; a guiding cage frame is coaxially arranged outside the transmission shaft, the lower end of the guiding cage frame is fixedly connected with the upper mounting edge of the adapter cylinder seat, a friction reducing and lubricating guiding hole is arranged at the center of the upper end plate of the guiding cage frame, and the transmission shaft is inserted into the friction reducing and lubricating guiding hole; a protective cover is fixedly mounted on the upper surface of the upper end plate of the guiding cage frame above the friction reducing and lubricating guiding hole.

6. A rapid clamping and welding device for a thin-walled cylinder with narrow-spacing circumferential welds according to claim 4, characterized in that: The tensioning execution assembly includes a driving tensioning flap, a driving slide rail, a driving slider, a driven tensioning flap, a driven slide rail and a driven slider; the driving slide rail adopts a parallel double-rail structure, the driving slide rail is fixedly mounted on the upper surface of the part tensioning support plate, the number of the driving slide rails is several, and the several driving slide rails are uniformly distributed along the circumferential direction; the driven slide rail adopts a parallel double-rail structure, the driven slide rail is fixedly mounted on the upper surface of the part tensioning support plate, the number of the driven slide rails is several, and the several driven slide rails are uniformly distributed along the circumferential direction; the driving slide rail and the driven slide rail are alternately arranged in the circumferential direction; the driving slider is slidably connected to the driving slide rail, and the driving tensioning flap is fixedly connected to the driving slider; the driven slider is slidably connected to the driven slide rail, and the driven tensioning flap is fixedly connected to the driven slider.

7. A rapid clamping and welding device for a thin-walled cylinder with a narrow-spacing circumferential weld, characterized in that: A protective gas channel is arranged inside the driving tensioning flap, a part driving tensioning pad is fixedly mounted on the outer edge of the driving tensioning flap, the part tensioning surface of the part driving tensioning pad is an arc surface, a driving tensioning flap protective gas accommodating groove is arranged along the arc direction on the part tensioning surface, and driving tensioning flap protective gas spraying holes are uniformly arranged along the arc direction at the bottom of the driving tensioning flap protective gas accommodating groove, and the driving tensioning flap protective gas spraying holes are communicated with the protective gas channel inside the driving tensioning flap.

8. A rapid clamping and welding device for a thin-walled cylinder with narrow-gap circumferential welds according to claim 6, characterized in that: A protective gas channel is arranged inside the driven tensioning flap, a part driven tensioning pad is fixedly mounted on the outer edge of the driven tensioning flap, the part tensioning surface of the part driven tensioning pad is an arc surface, a driven tensioning flap protective gas accommodating groove is arranged along the arc direction on the part tensioning surface, and driven tensioning flap protective gas spraying holes are uniformly arranged along the arc direction at the bottom of the driven tensioning flap protective gas accommodating groove, and the driven tensioning flap protective gas spraying holes are communicated with the protective gas channel inside the driven tensioning flap.

9. A rapid clamping and welding device for a thin-walled cylinder with narrow-spacing circumferential welds according to claim 6, characterized in that: A transmission pull rod is arranged between adjacent driving tensioning flap and driven tensioning flap, one end of the transmission pull rod is fixedly connected with the driving tensioning flap, and a pull pin is fixedly connected to the other end of the transmission pull rod; a pull pin limiting sliding groove is arranged on the driven tensioning flap, and the transmission pull rod is in transmission connection with the pull pin limiting sliding groove through the pull pin; a return spring is connected between the driven tensioning flap and the part tensioning support plate, one end of the return spring is fixedly connected with the part tensioning support plate, and the other end of the return spring is fixedly connected with the driven tensioning flap.

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