Thin-wall ellipsoid part tight supporting technology and tool

Abstract

The invention provides a thin-wall ellipsoid part tight-supporting process and a thin-wall ellipsoid part tight-supporting tool. The tightening process comprises the following steps: manufacturing a plurality of supporting devices and fixing bases corresponding to the supporting devices; the driving device drives the supporting devices to move in the radial direction of the corresponding fixing bases, so that the supporting devices support the inner wall of the bottom of the storage box, and alignment of the bottom of the thin-wall storage box is completed. According to the tight supporting technology, clamping can be facilitated, the clamping efficiency is improved, it can be guaranteed that the roundness of the clamped part meets the design requirement, and subsequent machining of the whole rocket storage tank is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of rocket tanks, and in particular to a thin-walled ellipsoid part bracing process and tooling. Background Art

[0002] With the rapid development of the aerospace industry, various technologies involved in the rocket field have also achieved rapid progress.

[0003] The aluminum alloy thin-walled bottom of the rocket tank is a semi-ellipsoidal surface, with a maximum diameter of about φ3350mm and a maximum wall thickness of less than 25mm. This thin-walled bottom part is usually a welded assembly. The deformation during the welding process will cause the surface of the part to deviate from the theoretical surface, making subsequent clamping and processing more difficult.

[0004] The existing clamping process generally uses mechanical tooling for manual clamping and pressing, which is labor-intensive, inefficient and poor in precision. The existing clamping process usually uses multiple contoured support blocks to move radially from inside to outside, forcing the parts to deform locally to achieve the clamping purpose.

[0005] Traditional tooling uses manual adjustment, and multiple contour support blocks move independently. The position of the contour support blocks needs to be adjusted repeatedly, which reduces production efficiency. In addition, the roundness of the parts after clamping can only reach 0.6-0.8mm, which seriously affects the subsequent processing and welding of the entire rocket tank, and thus affects the performance of the product.

[0006] There is an urgent need to provide a thin-walled ellipsoidal parts tightening process to simplify the clamping process, improve the clamping efficiency, ensure that the roundness of the parts after clamping meets the design requirements, and facilitate the subsequent processing of the entire rocket tank. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a thin-walled ellipsoidal part tightening process, which is convenient for quickly adjusting the radial displacement of the supporting device to quickly support the bottom of the thin-walled tank, and can improve work efficiency. It can also ensure that the roundness of the parts after clamping meets the design requirements, which is convenient for the subsequent processing of the entire rocket tank.

[0008] The present invention provides a thin-walled ellipsoid part tightening process.

[0009] Making a plurality of supporting devices and a fixed base corresponding to each supporting device;

[0010] The driving device drives each supporting device to move radially along the corresponding fixed base, so that the supporting device supports the inner wall of the tank bottom, thereby completing the alignment of the thin-wall tank bottom.

[0011] In one embodiment, making a plurality of the supporting devices specifically comprises:

[0012] The shape of each supporting device is made into a roughly trapezoidal body, and a curved surface is provided at the large-area end of each supporting device;

[0013] A fixing groove is respectively opened at the large-area end of each supporting device, and an elastic supporting strip is pasted on the inner wall of the fixing groove, wherein the height of the elastic supporting strip from the small-area end to the large-area end of the supporting device is greater than the depth of the fixing groove, and the relationship between the height A of the elastic supporting strip and the depth B of the fixing groove satisfies 2mm≤AB≤4mm.

[0014] In one embodiment, each supporting device is driven by a driving device to move radially along the corresponding fixed base so that the supporting device supports the inner wall of the tank bottom, and further comprises:

[0015] 24 supporting devices are arranged along the circumference of the fixed base;

[0016] The plurality of support devices are numbered and labeled in sequence, wherein the 24 support devices are divided into three groups, the first group comprises 4 support devices, which are arranged adjacent to each other at 90° intervals; the second group comprises 8 support devices, which are arranged adjacent to each other at 30° intervals and the angle with the support devices in the first group is 30°; the third group comprises the remaining 12 support devices, which are adjacent to each other at 30° intervals.

[0017] In one embodiment, before driving each supporting device to move radially along the corresponding fixed base so that the supporting device supports the inner wall of the tank bottom, the method further comprises:

[0018] The supporting device is placed in a retracted state by driving the driving device;

[0019] The bottom of the thin-walled storage tank is hoisted onto the fixed base so that the supporting device is located inside the bottom of the thin-walled storage tank.

[0020] In one embodiment, driving each supporting device to move radially along the fixed base so that the supporting device supports the inner wall of the tank bottom comprises:

[0021] The driving device is driven to adjust the radial direction of the supporting device of the first group so that the bottom of the thin-walled tank coincides with the center of the fixed base, and the protruding roundness of the contact part between the bottom of the thin-walled tank and the supporting device of the first group is C, and satisfies 0.2mm≤C≤0.5mm.

[0022] In one embodiment, after the radial direction of the support device of the first group is adjusted, the driving device is driven to adjust the radial direction of the support device of the second group, and the support device is manually fine-tuned, and the protruding roundness of the contact part between the bottom of the thin-walled tank and the support device of the second group is D, and satisfies 0.3mm≤C≤0.6mm.

[0023] In one embodiment, after the radial direction of the support device of the second group is adjusted, the driving device is driven to adjust the radial direction of the support device of the third group, and the support device is manually fine-tuned, and the protruding roundness of the contact part between the bottom of the thin-walled tank and the support device of the third group is E, and satisfies 0.3mm≤E≤0.5mm.

[0024] In one embodiment, each supporting device is driven by a driving device to move radially along the corresponding fixed base so that the supporting device supports the inner wall of the tank bottom, and further comprises:

[0025] An adjusting bolt is arranged in the circumferential direction of the fixed base and can move axially along the fixed base. The adjusting bolt is adjusted so that the upper end surface of the adjusting bolt abuts against the lower end surface of the bottom end of the thin-walled storage tank.

[0026] After the support devices of the first, second and third groups are adjusted so that the protruding roundness E of the contact portion between the bottom of the thin-walled tank and the support device of the third group satisfies 0.3mm≤E≤0.5mm, the height of the adjusting bolt is adjusted to adjust the flatness of the lower end face of the bottom of the thin-walled tank to F, and satisfy F≤0.5mm.

[0027] The present invention also provides a thin-walled ellipsoid part tightening tool, comprising a fixed base, a limiting device, a plurality of supporting devices and a driving device, wherein:

[0028] The supporting device, the driving device and the limiting device are all located on the fixed base; in the middle of the fixed base, one end of the limiting device is connected to the fixed base, and the other end is used to fix the bottom end of the thin-walled tank; the supporting device and the driving device are arranged along the circumference of the fixed base, and the driving device is used to drive the supporting device so that one end of the supporting device moves along the radial direction of the fixed base and abuts against the inner wall of the bottom of the thin-walled tank, thereby completing the support of the bottom of the thin-walled tank.

[0029] Furthermore, the fixed base is a disc structure; the limiting device includes a limiting column, an upper locking nut and a lower locking nut, one end of the limiting column is fixedly connected to the fixed base, and the other end sequentially passes through the lower locking nut, the thin-walled tank bottom and the upper locking nut, and is screwed with the limiting column through the upper locking nut and the lower locking nut to fix the bottom end of the thin-walled tank bottom on the limiting column; the driving device includes an air supply device, a cylinder assembly, a steering force assembly and a connecting assembly, wherein the air supply device is connected to one end of the cylinder assembly, the telescopic end of the cylinder assembly is connected to one end of the steering force assembly, the other end of the steering force assembly is connected to one end of the connecting assembly, and the other end of the connecting assembly is used to connect to the supporting device.

[0030] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0031] An embodiment of the present invention provides a thin-walled ellipsoidal part tightening process. A plurality of supporting devices and a fixed base corresponding to each supporting device are manufactured; each supporting device is driven to move radially along the corresponding fixed base by a driving device, so that the supporting device supports the inner wall of the tank bottom, and the alignment of the thin-walled tank bottom is completed. This process is convenient for quickly adjusting the radial displacement of the supporting device to quickly support the thin-walled tank bottom, and can improve work efficiency, and can also ensure that the roundness of the parts after clamping meets the design requirements, which is convenient for the subsequent processing of the entire rocket tank.

[0032] It should be understood that the foregoing general description and the following detailed description are merely exemplary and illustrative and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The following drawings are a part of the specification of the present invention, and illustrate exemplary embodiments of the present invention. Together with the description of the specification, the accompanying drawings are used to explain the principles of the present invention.

[0034] Figure 1 It is a structural schematic diagram of a tightening tool in an embodiment of the present invention;

[0035] Figure 2 A schematic structural diagram of a driving device in an embodiment of the present invention;

[0036] Figure 3 This is a process flow chart of tightening a thin-walled ellipsoidal part according to the present invention;

[0037] Figure 4 It is a schematic diagram of the grouping of the support device of the present invention;

[0038] Figure 5 It is a front view of the supporting device and the elastic supporting strip of the present invention;

[0039] Figure 6 It is a left view of the supporting device and the elastic supporting strip of the present invention;

[0040] Figure 7 It is a structural schematic diagram of the tank bottom of the present invention.

[0041] Description of reference numerals:

[0042] 1Fixed base 2Limiting device

[0043] 3 Support device 4 Air supply device

[0044] 5 Cylinder assembly 6 Steering booster assembly

[0045] 7 connection assembly 8 tank bottom

[0046] 9 elastic support strip 10 adjusting bolt DETAILED DESCRIPTION

[0047] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0048] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present application description and examples are exemplary only.

[0049] The present invention provides a thin-walled ellipsoid part tightening process. Figure 1 , Figure 3 and Figure 7 As shown, the process includes:

[0050] Making a plurality of supporting devices 3 and a fixed base 1 corresponding to each supporting device 3;

[0051] The driving device drives each supporting device 3 to move radially along the corresponding fixed base 1, so that the supporting device 3 supports the inner wall of the tank bottom 8, completes the alignment of the thin-walled tank bottom 8, and ensures that the roundness of the parts meets the design requirements.

[0052] like Figure 1 , Figure 2 , Figure 5 and Figure 6 In order to facilitate the close contact between the supporting device 3 and the inner wall of the tank bottom, the manufacturing of a plurality of the supporting devices specifically includes:

[0053] The outer shape of each supporting device 3 is made into a roughly trapezoidal body, and a curved surface is provided at the large-area end of each supporting device 3, wherein the large-area end of the supporting device 3 is used to support the inner wall of the bottom 8 of the thin-walled storage tank, and the curved surface of the large-area end of the supporting device 3 matches the inner wall of the bottom 8 of the thin-walled storage tank.

[0054] In addition, in order to prevent the tank bottom 8 from axial movement, a fixing groove is provided at the large-area end of each support device 3, and an elastic support strip 9 is pasted on the inner wall of the fixing groove, wherein the height of the elastic support strip 9 is greater than the depth of the fixing groove along the direction from the small-area end to the large-area end of the support device 3. In order to ensure that the elastic support strip 9 has sufficient compression space and that the elastic support strip 9 is on the same curved surface as the outer wall of the support device 3 during the compression process, after a large number of experimental simulations, when the relationship between the height A of the elastic support strip 9 and the depth B of the fixing groove satisfies 2mm≤AB≤4mm, not only is it ensured that the elastic support strip 9 has sufficient compression space, but also the elastic support strip 9 can be tightly attached to the inner wall of the tank bottom 8. By optimizing the size of the elastic support strip 9 and the fixing groove, the present application can not only increase the friction between the support device 3 and the inner wall of the thin-walled tank bottom, but also prevent the thin-walled tank bottom from moving up and down when subjected to force, avoid multiple clamping of the thin-walled tank bottom, and improve work efficiency.

[0055] In addition, an elastic support strip 9 is provided in the fixing groove, and one side of the elastic support strip is closely attached to the inner wall of the fixing groove, and the other side is used to closely attach to the inner wall of the bottom of the thin-walled tank, thereby improving the stability of the tank support. By providing the fixing groove and the elastic support strip, the present application can avoid the support device 3 and the inner wall of the bottom of the thin-walled tank from being damaged by direct contact, thereby ensuring the integrity of the inner wall of the bottom of the thin-walled tank.

[0056] like Figure 1 , Figure 2 and Figure 4 As shown, in order to quickly align the bottom 8 of the thin-walled tank, each supporting device 3 is driven by a driving device to move radially along the corresponding fixed base 1, so that the supporting device supports the inner wall of the bottom of the tank, and further comprises:

[0057] A plurality of supporting devices are evenly arranged along the circumference of the fixed base (the following description is based on a case where there are 24 supporting devices, but the number of supporting devices of the present application is not limited thereto);

[0058] The 24 supporting devices 3 are numbered and marked in sequence, and the 24 supporting devices are divided into three groups. The first group has 4 devices, which are arranged adjacent to each other at an interval of 90°; the second group has 8 devices, which are arranged adjacent to each other at an interval of 30° and the angle with the first group of supporting devices is 30°; the third group is the remaining 12 devices, which are adjacent to each other at an interval of 30°. Specifically, the 24 supporting devices are arranged on a circumference. First, the first group of 4 devices move radially (the second and third groups remain at their original positions) to adjust the protruding roundness of the contact part between the bottom of the thin-walled tank and the first group of supporting devices; then the second group of 8 devices move radially (the first group moves to a new position and remains stationary, and the third group remains at its original position) to adjust the protruding roundness of the contact part between the bottom of the thin-walled tank and the second group of supporting devices; finally, the third group of 12 devices move radially (the first and second groups move to a new position and remain stationary) to adjust the protruding roundness of the contact part between the bottom of the thin-walled tank and the third group of supporting devices, so that the roundness of the entire bottom of the thin-walled tank meets the requirements. The tightening process of the present application realizes sequential adjustment and optimization of the roundness of the thin-walled storage tank by setting 24 supporting devices and adjusting them sequentially in three groups, thereby greatly improving the supporting roundness of the storage tank supported by the supporting device.

[0059] Driving each supporting device 3 to move radially along the corresponding fixed base 1 so that the supporting device 3 supports the inner wall of the tank bottom 8 also includes:

[0060] The supporting device 3 is put into a retracted state by driving the driving device;

[0061] The thin-walled tank bottom 8 is hoisted onto the fixed base 1 so that the supporting device 3 is located inside the thin-walled tank bottom 8 .

[0062] Driving each supporting device 3 to move radially along the fixed base 1 so that the supporting device supports the inner wall of the tank bottom comprises:

[0063] The driving device is driven to adjust the radial direction of the first group of supporting devices so that the bottom 8 of the thin-walled tank coincides with the center of the fixed base 1. After the first group of supporting devices and the thin-walled tank are matched, the protruding roundness C of the contact part between the bottom of the thin-walled tank and the first group of supporting devices satisfies 0.2mm≤C≤0.5mm.

[0064] After the first group of support devices 3 are adjusted, the driving device is driven to adjust the radial direction of the second group of support devices, and the support devices 3 can be manually fine-tuned. After the second group of support devices are matched with the tank, the protruding roundness D of the contact part between the bottom of the thin-walled tank and the second group of support devices meets 0.3mm≤C≤0.6mm.

[0065] After the second group of support devices are adjusted, the driving device is driven to adjust the radial direction of the third group of support devices 3, and the support devices 3 can be manually fine-tuned. After the second group of support devices and the tank are matched, the protrusion roundness E of the contact part between the thin-walled tank bottom 8 and the third group of support devices 3 meets 0.3mm≤E≤0.5mm.

[0066] In one embodiment, the driving device drives each supporting device to move radially along the corresponding fixed base so that the supporting device supports the inner wall of the tank bottom, and further comprises:

[0067] An adjusting bolt 10 (multiple evenly arranged along the circumference of the fixed base 1) is arranged around the fixed base 1 and can move axially along the fixed base 1. The upper end surface of the adjusting bolt 10 abuts against the lower end surface of the bottom of the thin-walled tank. After the support device of the first, second and third groups is adjusted, the height of the adjusting bolt 10 is rotated to adjust the flatness F of the lower end surface of the bottom of the thin-walled tank to meet F≤0.5mm. Even if the protruding roundness E and flatness F of the thin-walled tank meet 0.3mm≤E≤0.5mm, F≤0.5mm, the alignment of the bottom of the thin-walled tank is completed, thereby ensuring that the roundness of the clamped parts meets the design requirements.

[0068] like Figure 1 and Figure 2 As shown, the present invention also provides a thin-walled ellipsoid part tightening tooling, comprising a fixed base 1, a limiting device 2, a plurality of supporting devices 3 and a driving device. Among them, the supporting device 3, the driving device and the limiting device 2 are all located on the fixed base 1; in the middle of the fixed base 1, one end of the limiting device 2 is connected to the fixed base 1, and the other end is used to fix the bottom end of the thin-walled tank; the supporting device 3 and the driving device are arranged circumferentially along the fixed base 1, and the driving device is used to drive the supporting device 3, so that one end of the supporting device 3 moves along the radial direction of the fixed base 1 and abuts against the inner wall of the bottom of the thin-walled tank, thereby completing the support of the bottom of the thin-walled tank.

[0069] Specifically, a thin-walled ellipsoid part tightening tool of the present application can be composed of a fixed base 1, a limiting device 2, a plurality of supporting devices 3 and a driving device. The tightening tool of the present application is arranged circumferentially along the fixed base 1 through the supporting device 3 and the driving device. The driving device can drive one end of the supporting device 3 to move radially along the fixed base 1 and abut against the inner wall of the bottom of the thin-walled tank, thereby completing the support of the bottom of the thin-walled tank. The driving device of the present application replaces the traditional manual adjustment method, and is convenient for automatically and quickly adjusting the radial displacement of the supporting device 3 to quickly support the bottom of the thin-walled tank, thereby improving work efficiency and adjustment accuracy.

[0070] In addition, one end of the limiting device 2 of the tightening tool in the present application is connected to the fixed base 1, and the other end is used to fix the bottom end of the thin-walled tank. On the one hand, it ensures that the middle part of the bottom end of the fixed thin-walled tank is firmly fixed to avoid axial movement of the bottom end of the thin-walled tank. At the same time, through the cooperation of the driving device and the supporting device 3, the supporting device 3 effectively supports the inner wall of the bottom end of the thin-walled tank, which can further limit the radial movement of the bottom of the thin-walled tank, ensuring that the roundness of the parts after clamping meets the design requirements, which is convenient for the subsequent processing of the entire rocket tank.

[0071] In this embodiment, in order to ensure the structural stability of the fixed base 1, for example, the fixed base 1 is a disc structure. In order to facilitate the fixing of the thin-walled tank bottom by the limiting device 2, for example, the limiting device includes a limiting column, an upper locking nut and a lower locking nut. One end of the limiting column is connected to the fixed base 1, and the other end passes through the lower locking nut, the thin-walled tank bottom and the upper locking nut in sequence, and is screwed to the limiting column through the upper locking nut and the lower locking nut to fix the bottom end of the thin-walled tank bottom on the limiting column.

[0072] like Figure 1 and Figure 2 As shown, in order to facilitate the control and adjustment of the driving device, for example, the driving device includes an air supply device 4, a cylinder assembly 5, a steering force assembly 6 and a connecting assembly 7. Among them, the air supply device 4 is connected to one end of the cylinder assembly 5, the telescopic end of the cylinder assembly 5 is connected to one end of the steering force assembly 6, the other end of the steering force assembly 6 is connected to one end of the connecting assembly 7, and the other end of the connecting assembly 7 is used to connect to the supporting device 3. The air supply device 4 inflates the cylinder assembly 5, and the cylinder assembly 5 is subjected to gas pressure so that its telescopic end drives the steering force assembly 6 to move, thereby driving the connecting assembly 7 to move. The entire driving device assembly is tightly matched, which is easy to control, and effectively converts the telescopic action of the cylinder into a tightening action of the supporting device.

[0073] In this embodiment, the gas supply device 4 includes at least one gas cylinder, a first delivery pipe, a second delivery pipe and a gas supply ring. The gas cylinder is fixed on the limiting device 2, the output end of the gas cylinder is connected to the input end of the first delivery pipe, the output end of the first delivery pipe is connected to the input end of the gas supply ring, the output end of the gas supply ring is connected to the input end of the second delivery pipe, and the output end of the second delivery pipe is connected to one end of the cylinder assembly. It should be noted that in actual application, in order to ensure sufficient gas supply, the gas cylinders can be increased according to actual needs. For example, multiple gas cylinders can be evenly arranged on the fixed base 1 around the limiting device 2.

[0074] In addition, in order to improve the working efficiency of the cylinder assembly 5, for example, the telescopic direction of the cylinder assembly can be parallel to the axis of the fixed base 1.

[0075] like Figure 1 and Figure 2As shown, the steering boosting assembly 6 includes a steering boosting rod, a first locking bolt and a fixing platform. The steering boosting rod is provided with a first rotation hole in the middle and second rotation holes at both ends. The first locking bolt fixes the steering boosting rod to the end of the fixing platform away from the fixing base 1, and the steering boosting rod can rotate circumferentially along the first locking bolt. The two ends of the steering boosting rod are connected to the cylinder assembly 5 and the connecting assembly 7 respectively through the second locking bolt and the third locking bolt.

[0076] In this embodiment, in order to change the direction of force transmission and ensure that the output of the steering force boosting assembly is quickly transmitted to the connecting assembly 7, so that the steering force boosting assembly can quickly apply pressure to the supporting device 3, for example, the steering force boosting rod includes a first steering rod and a second steering rod, and the transition portion where the first steering rod and the second steering rod are connected to each other forms an angle.

[0077] In addition, in order to avoid the shaking of the steering booster rod and ensure that the steering booster rod can output stably, for example, one end of the fixed platform is fixedly connected to the fixed base 1, and the other end is provided with a double raised platform arranged side by side, and the double raised platform is provided with a locking hole. One end of the first locking bolt passes through the locking hole of the double raised platform on one side, the first rotating hole and the locking hole of the double raised platform on the other side in sequence, and is then locked by a nut. The input end of the steering booster rod is connected to the telescopic end of the cylinder assembly 5 through the second locking bolt.

[0078] Specifically, in order to facilitate installation and disassembly, for example, the connecting assembly 7 includes a connecting rod, a first connecting block, a second connecting block and a third connecting block. The first connecting block and the second connecting block are U-shaped components, and the third connecting block includes an integrally formed bottom plate and a raised plate. The raised plate is located on the side of the bottom plate away from the support device 3 and is centrally arranged (raised toward the side away from the support device). The first connecting block and the second connecting block are separated at both ends of the connecting rod and are threadedly connected to the connecting rod. The distance between the first connecting block and the second connecting block is adjusted by rotating the connecting rod. The first connecting block is connected to one end of the steering boost rod through the third locking bolt, and the steering boost rod can rotate circumferentially along the third locking bolt. The second connecting block is connected to the raised plate through the fourth locking bolt. The bottom plate is used to be in close contact with the surface of the support device to apply a push-pull force to the support device 3, and the bottom plate is fixedly connected to the support device 3 by bolts.

[0079] The above description is only an illustrative specific implementation manner of the present invention. Without departing from the concept and principle of the present invention, any equivalent changes and modifications made by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A thin-walled ellipsoidal part tightening process, characterized in that: Making a plurality of supporting devices and a fixed base corresponding to each supporting device; The driving device drives each supporting device to move radially along the corresponding fixed base, so that the supporting device supports the inner wall of the tank bottom, thereby completing the alignment of the thin-wall tank bottom.

2. The thin-walled ellipsoid part bracing process according to claim 1 is characterized in that: Making a plurality of the supporting devices specifically comprises: The shape of each supporting device is made into a roughly trapezoidal body, and a curved surface is provided at the large-area end of each supporting device; A fixing groove is respectively opened at the large-area end of each supporting device, and an elastic supporting strip is pasted on the inner wall of the fixing groove, wherein the height of the elastic supporting strip from the small-area end to the large-area end of the supporting device is greater than the depth of the fixing groove, and the relationship between the height A of the elastic supporting strip and the depth B of the fixing groove satisfies 2mm≤AB≤4mm.

3. The thin-walled ellipsoid part bracing process according to claim 1 is characterized in that: The driving device drives each supporting device to move radially along the corresponding fixed base so that the supporting device supports the inner wall of the bottom of the tank, and further comprises: 24 supporting devices are evenly arranged along the circumference of the fixed base; The plurality of support devices are numbered and labeled in sequence, wherein the 24 support devices are divided into three groups, the first group comprises 4 support devices, which are arranged adjacent to each other at 90° intervals; the second group comprises 8 support devices, which are arranged adjacent to each other at 30° intervals and the angle with the support devices in the first group is 30°; the third group comprises the remaining 12 support devices, which are adjacent to each other at 30° intervals.

4. The thin-walled ellipsoid part bracing process according to claim 3 is characterized in that: Driving each supporting device to move radially along the corresponding fixed base so that the supporting device supports the inner wall of the tank bottom also includes: The supporting device is placed in a retracted state by driving the driving device; The bottom of the thin-walled storage tank is hoisted onto the fixed base so that the supporting device is located inside the bottom of the thin-walled storage tank.

5. The thin-walled ellipsoid part tightening process according to claim 4 is characterized in that: Driving each supporting device to move radially along the fixed base so that the supporting device supports the inner wall of the tank bottom comprises: The driving device is driven to adjust the radial direction of the supporting device of the first group so that the center of the bottom of the thin-walled tank coincides with the center of the fixed base, and the protruding roundness C of the contact portion between the bottom of the thin-walled tank and the supporting device of the first group satisfies 0.2mm≤C≤0.5mm.

6. The thin-walled ellipsoid part tightening process according to claim 5, characterized in that: After the radial direction of the support device of the first group is adjusted, the driving device is driven to adjust the radial direction of the support device of the second group, and the support device is manually fine-tuned so that the protruding roundness D of the contact part between the bottom of the thin-walled tank and the support device of the second group satisfies 0.3mm≤C≤0.6mm.

7. The thin-walled ellipsoid part bracing process according to claim 6, characterized in that: After the radial direction of the support device of the second group is adjusted, the driving device is driven to adjust the radial direction of the support device of the third group, and the support device is manually fine-tuned so that the protruding roundness E of the contact part between the bottom of the thin-walled tank and the support device of the third group satisfies 0.3mm≤E≤0.5mm.

8. The thin-walled ellipsoid part bracing process according to claim 7, characterized in that: The driving device drives each supporting device to move radially along the corresponding fixed base so that the supporting device supports the inner wall of the bottom of the tank, and further comprises: An adjusting bolt is arranged in the circumferential direction of the fixed base and can move axially along the fixed base. The adjusting bolt is adjusted so that the upper end surface of the adjusting bolt abuts against the lower end surface of the bottom end of the thin-walled storage tank. After the support devices of the first, second and third groups are adjusted so that the protruding roundness E of the contact portion between the bottom of the thin-walled tank and the support device of the third group satisfies 0.3mm≤E≤0.5mm, the height of the adjusting bolt is adjusted to adjust the flatness of the lower end face of the bottom of the thin-walled tank to F, and satisfy F≤0.5mm.

9. A thin-walled ellipsoidal part tightening tool, characterized in that , comprising a fixed base, a limiting device, a plurality of supporting devices and a driving device, wherein, The supporting device, the driving device and the limiting device are all located on the fixed base; in the middle of the fixed base, one end of the limiting device is connected to the fixed base, and the other end is used to fix the bottom end of the thin-walled tank; the supporting device and the driving device are arranged along the circumference of the fixed base, and the driving device is used to drive the supporting device so that one end of the supporting device moves along the radial direction of the fixed base and abuts against the inner wall of the bottom of the thin-walled tank, thereby completing the support of the bottom of the thin-walled tank.

10. The thin-walled ellipsoidal part tightening tool according to claim 9, characterized in that The fixed base is a disc structure; the limiting device includes a limiting column, an upper locking nut and a lower locking nut, one end of the limiting column is fixedly connected to the fixed base, and the other end passes through the lower locking nut, the bottom of the thin-walled tank and the upper locking nut in sequence, and is screwed with the limiting column through the upper locking nut and the lower locking nut to fix the bottom end of the thin-walled tank bottom on the limiting column; the driving device includes an air supply device, a cylinder assembly, a steering force assembly and a connecting assembly, wherein the air supply device is connected to one end of the cylinder assembly, the telescopic end of the cylinder assembly is connected to one end of the steering force assembly, the other end of the steering force assembly is connected to one end of the connecting assembly, and the other end of the connecting assembly is used to connect to the supporting device.

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