Carrying rocket cabin section assembly device, sheet metal frame assembly adjusting device and using method thereof

Abstract

The application relates to a carrying rocket sheet metal frame assembly adjusting device, which comprises a connecting frame, an adjusting rod and an external shape adjusting device. The connecting frame is a regular polygon or a special-shaped polygon, and the middle part of the frame is provided with a through adjusting hole. The adjusting rod passes through the adjusting hole and can move up and down along the adjusting hole. The external shape adjusting device comprises an external shape limiting block, an adjusting bolt and a limiting block. The upper surface of the external shape limiting block is connected to the lower end of the adjusting rod, and the external shape limiting block is provided with an adjusting groove with an opening away from the central axis of the connecting frame. The external shape limiting block is provided with a threaded adjusting hole penetrating the inside and the outside. The limiting block is located in the adjusting groove, the adjusting bolt is screwed into the threaded adjusting hole, the inner end of the adjusting bolt extends into the adjusting groove and abuts against the outer surface of the limiting block, and the outer end of the adjusting bolt is located outside the external shape limiting block. The application can adjust the sheet metal frame without damage, avoid increasing the weight and manufacturing cost of the carrying rocket cabin section, and make the adjustment of the sheet metal frame convenient.

Description

Technical Field

[0001] This application relates to the field of aerospace mechanical assembly technology, and in particular to a launch vehicle section assembly device, a launch vehicle sheet metal frame assembly and adjustment device, and a method for using the launch vehicle sheet metal frame assembly and adjustment device. Background Technology

[0002] The sheet metal frame of a launch vehicle, acting as the "ribs" of the rocket, together with stringers, skin, and other components, forms the rocket's body structure. It provides overall frame support for the rocket, maintains its shape, bears various loads during transportation, launch, and flight, and transmits and distributes the forces borne by different parts of the rocket, ensuring the rational transmission of forces within the rocket's body structure, enabling the rocket to withstand enormous thrust and aerodynamic forces.

[0003] Currently, sheet metal frames for rocket body structures are mainly formed using stretch bending or roll bending processes, followed by quenching and shaping. During the forming process, stretch bending or roll bending dies are typically used to ensure sheet metal forming accuracy and control the part's dimensions. However, due to the mechanical properties and other properties of the material, the sheet metal frame may undergo various changes after forming (e.g., springback), resulting in deviations between the actual and theoretical dimensions. This can lead to various problems during assembly, such as interference, excessive flatness, or deformation that prevents assembly.

[0004] Currently, regarding the shape adjustment of the sheet metal frame, tools such as wooden hammers can be used to reshape it. However, since the sheet metal frame has already been quenched, reshaping it can easily cause material cracks, leading to part scrap. Alternatively, the deformed areas can be ground down, but this can thin the part and reduce its mechanical properties. Another option is to add shims to eliminate assembly gaps, but this can increase the weight of the launch vehicle section. As for adjusting the height of the sheet metal frame, the current method mainly involves using jacks on the upper or lower surface of the frame. This height adjustment relies on external devices such as jacks, making it inconvenient to use.

[0005] Therefore, how to adjust the sheet metal frame without damage and avoid increasing the weight of the launch vehicle section, making the adjustment of the sheet metal frame convenient, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] This application provides a sheet metal frame assembly and adjustment device for launch vehicles and its usage method. By setting a connecting frame on the assembly jig and cooperating with multiple sets of shape adjustment devices and lead screws, the height, flatness and shape dimensions of the sheet metal frame can be adjusted. It has the advantages of not damaging the sheet metal frame parts, convenient use, and the ability to use different sizes of connecting frames according to different sections to assemble sheet metal frames of launch vehicle sections with different diameters, thereby reducing the manufacturing cost of sheet metal frames and meeting the high-precision assembly requirements of sheet metal frames.

[0007] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0008] A sheet metal frame assembly and adjustment device for a launch vehicle includes: a connecting frame, multiple adjusting rods, and multiple shape adjustment devices; wherein, the connecting frame is in the shape of a regular polygon or an irregular shape, and each of its side frames has an adjustment hole that runs vertically through the middle part; each adjusting rod passes through an adjustment hole and can move vertically along the adjustment hole.

[0009] The shape adjustment device includes: a shape limiting block, multiple adjusting bolts, and multiple limiting blocks; wherein, the upper surface of each shape limiting block is connected to the lower end of an adjusting rod, and it has an adjusting groove with an opening opposite to the central axis of the connecting frame, and each shape limiting block has multiple threaded adjusting holes that penetrate inside and outside; the multiple limiting blocks are located in the adjusting groove, each adjusting bolt is screwed into the threaded adjusting hole, and its inner end extends into the adjusting groove and abuts against the outer surface of the limiting block, and the outer end of each adjusting bolt is located on the outside of the shape limiting block.

[0010] In the above-described assembly and adjustment device for the sheet metal frame of a launch vehicle, preferably, a fixing part extends outward from each apex corner of the connecting frame for fixing to the upper platform of the assembly frame.

[0011] In the above-described assembly and adjustment device for the sheet metal frame of the launch vehicle, preferably, the fixing part has a through fixing hole for passing through a fixing bolt to achieve fixing to the upper platform of the assembly frame.

[0012] In the above-described assembly and adjustment device for the sheet metal frame of the launch vehicle, preferably, the adjustment hole is a threaded hole, the adjustment rod is a lead screw, and the adjustment rod is threadedly engaged with the adjustment hole.

[0013] In the above-described assembly and adjustment device for the sheet metal frame of the launch vehicle, preferably, the shape limiting block and the adjustment rod are connected by a single-degree-of-freedom rotating joint.

[0014] In the above-described assembly and adjustment device for the sheet metal frame of the launch vehicle, preferably, the upper sidewall of the adjustment groove extends horizontally, the lower sidewall of the adjustment groove extends gradually downward from back to front, and the rear sidewall of the adjustment groove extends vertically.

[0015] A launch vehicle segment assembly device, characterized in that it comprises: an assembly frame and a launch vehicle sheet metal frame assembly adjustment device as described in any one of the above claims; wherein, the assembly frame comprises: an upper platform, a base, and multiple columns; the upper platform and the base each have one or more rings of positioning holes for fixed connection with the front and rear frames of the launch vehicle segment, respectively, and the middle part of the upper platform has a vertically penetrating assembly opening; the upper end of each column is connected to the lower surface of the upper platform near the outer side and is located outside the positioning hole of the upper platform, and the lower end of each column is connected to the upper surface of the base near the outer side and is located outside the positioning hole of the base, and the length of all columns is adjustable; the connecting frame of the launch vehicle sheet metal frame assembly adjustment device is located in the middle part of the upper platform and is fixedly connected to the upper platform; the adjusting rod and the shape adjusting device of the launch vehicle sheet metal frame assembly adjustment device extend from the assembly opening of the upper platform to its lower part.

[0016] In the launch vehicle section assembly device described above, preferably, all the columns are located on the same circumference and are evenly distributed on the circumference.

[0017] In the launch vehicle section assembly device described above, preferably, the upper platform is provided with an inner threaded fixing hole located in the positioning hole, and the fixing bolt passes through the fixing hole on the fixing part of the connecting frame and is screwed into the threaded fixing hole of the upper platform to achieve the fixing of the connecting frame and the upper platform.

[0018] A method for using a launch vehicle sheet metal frame assembly and adjustment device, applicable to any of the above-mentioned launch vehicle sheet metal frame assembly and adjustment devices, includes the following steps: Step S41: After the initial assembly of the launch vehicle section is completed, the sheet metal frame is placed into the adjustment groove of the shape limiting block, and the position of the limiting block is adjusted by turning the adjusting bolts so that the inner surface of the limiting block is in contact with the outer surface of the sheet metal frame; Step S42: The height of the upper plane of the sheet metal frame is measured using a height measuring tool, and the position of the adjusting rod is adjusted according to the height measurement result, the shape of the launch vehicle section, and the gap between the sheet metal frame and the launch vehicle section at the contact position to complete the coarse adjustment of the height of the sheet metal frame; Step S43: According to the fit between the sheet metal frame and the launch vehicle section at the contact position and the degree of fit between the sheet metal frame and the limiting block, the adjusting bolts are adjusted to finely adjust the height of the sheet metal frame; Step S44: After the fine adjustment is completed, the sheet metal frame is fixedly connected to the stringers and skin of the launch vehicle section.

[0019] Compared to the aforementioned background technology, this application, by setting a connecting frame on the assembly jig and using multiple sets of shape adjustment devices and adjustment rods, achieves adjustment of the height, flatness, and overall dimensions of the sheet metal frame. This achieves the effect of not damaging the sheet metal frame, making it convenient to use, and avoiding increasing the weight of the launch vehicle segment. Furthermore, different sized connecting frames can be used depending on the launch vehicle segment, enabling the assembly of sheet metal frames for launch vehicle segments of different diameters, reducing the manufacturing cost of the sheet metal frame and meeting the high-precision assembly requirements. In addition, this application can be used in conjunction with existing riveting jigs for launch vehicle segments; only the addition of a launch vehicle sheet metal frame assembly adjustment device is needed to achieve the high-precision assembly requirements of the sheet metal frame. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the assembly and adjustment device for the sheet metal frame of the launch vehicle in this application;

[0022] Figure 2 This is a schematic diagram of the shape adjustment device of the launch vehicle sheet metal frame assembly adjustment device of this application;

[0023] Figure 3 This is a schematic diagram of the launch vehicle section assembly device of this application;

[0024] Figure 4 This is a flowchart illustrating the usage method of the launch vehicle sheet metal frame assembly and adjustment device of this application. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] like Figure 1As shown, this application provides a launch vehicle sheet metal frame assembly and adjustment device 10, including: a connecting frame 11, multiple adjusting rods 12, and multiple shape adjustment devices 13; wherein, the connecting frame 11 is a regular polygon or an irregular shape (its shape can be determined according to the shape of the sheet metal frame and adjustment requirements), and each side of the connecting frame 11 has a through-hole in the middle; each adjusting rod 12 passes through an adjusting hole, and each adjusting rod 12 can move up and down along the adjusting hole. In this application, different numbers of adjusting rods 12 and shape adjustment devices 13 can be set according to different accuracy requirements of the shape and size of the sheet metal frame, thereby realizing the adjustment of the sheet metal frame to different accuracy.

[0027] like Figure 2 As shown, the shape adjustment device 13 includes: a shape limiting block 131, a plurality of adjusting bolts 132, and a plurality of limiting blocks 133; wherein, the upper surface of each shape limiting block 131 is connected to the lower end of an adjusting rod 12, so that all shape limiting blocks 131 are located on the same circumference, thus enabling adjustment of the circular sheet metal frame 20; and each shape limiting block 131 has an adjusting groove with an opening opposite to the central axis of the connecting frame 11, and each shape limiting block 131 has a plurality of threaded adjusting holes penetrating inside and outside; the plurality of limiting blocks 133 are located in the adjusting groove of the shape limiting block 131, each adjusting bolt 132 is screwed into the threaded adjusting hole, and its inner end extends into the adjusting groove and abuts against the outer surface of the limiting block 133, and the outer end of each adjusting bolt 132 is located outside the shape limiting block 131, for screwing the adjusting bolt 132 inward or outward.

[0028] In use, the sheet metal frame 20 (e.g., the tapered sheet metal frame with the highest requirements in the assembly of launch vehicle sections) is placed into the adjustment slot of the shape limiting block 131, the adjusting bolt 132 is turned to adjust the position of the limiting block 133 so that the inner surface of the limiting block 133 fits with the outer surface of the sheet metal frame 20, and the adjusting rod 12 is adjusted up and down so that the sheet metal frame 20 is at the required height. Thus, the shape, height and fit of the sheet metal frame 20 with the section are adjusted according to the design requirements.

[0029] Optionally, the connecting frame 11 is octagonal. Alternatively, each apex of the connecting frame 11 extends outward with a fixing part 111 for fixing to the upper platform of the assembly frame. Still optionally, the fixing part 111 has a through-hole for passing a fixing bolt, thereby achieving a fixed connection with the upper platform of the assembly frame. Still optionally, the adjusting hole is a threaded hole, and the adjusting rod 12 is a lead screw, with the adjusting rod 12 threaded into the adjusting hole.

[0030] Optionally, the shape limiting block 131 of the shape adjustment device 13 is connected to the adjustment rod 12 by a single-degree-of-freedom revolute joint. A single-degree-of-freedom revolute joint refers to two components that are connected in a certain way, allowing them to rotate relative to each other around a specific axis, while restricting movement in other directions. The single-degree-of-freedom revolute joint ensures that the constraint direction of the shape adjustment device 13 remains unchanged when the adjustment rod 12 rotates.

[0031] Optionally, the upper sidewall of the adjustment groove extends horizontally, and the lower sidewall of the adjustment groove gradually slopes downward from back to front, where "front" refers to the direction in which the opening of the adjustment groove faces. The rear sidewall of the adjustment groove extends vertically. The shape of the shape limiting block 131 and its adjustment groove is limited by the extension of the upper, lower, and rear sidewalls of the adjustment groove. Alternatively, the position and number of the adjusting bolts 132 and the limiting blocks 133 can be set according to the cross-sectional requirements of the sheet metal frame. By replacing the shape limiting blocks 131 with different shapes, the adjustment requirements for the shape of sheet metal frames of different shapes can be met. Furthermore, by replacing the shape limiting blocks 131 with different sizes, the adjustment requirements for the shape of sheet metal frames of different sizes can be met. Therefore, this application can achieve the adjustment and assembly of sheet metal frames with various cross-sections using a single sheet metal frame assembly and adjustment device 10.

[0032] like Figure 3 As shown, this application also provides a launch vehicle section assembly device, including: an assembly frame 30 and the aforementioned launch vehicle sheet metal frame assembly and adjustment device 10; wherein, the assembly frame 30 includes: an upper platform 31, a base 32 and a plurality of columns 33.

[0033] Both the upper platform 31 and the base 32 have one or more rings of positioning holes for fixed connection with the front and rear frames of the launch vehicle segment, respectively. The upper platform 31 has a through-hole assembly opening in the middle for installing the skin and stringers of the launch vehicle segment. The upper end of each column 33 is connected to the outer part of the lower surface of the upper platform 31 and is located outside the positioning hole of the upper platform 31. The lower end of each column 33 is connected to the outer part of the upper surface of the base 32 and is located outside the positioning hole of the base 32, so as to avoid the columns 33 interfering with the connection between the upper platform 31 and the front frame and the connection between the base 32 and the rear frame. In addition, the length of all columns 33 is adjustable, so that during the assembly of the launch vehicle segment, the length of the columns 33 can be adjusted to adapt to the height of launch vehicle segments of different heights.

[0034] The connecting frame 11 of the launch vehicle sheet metal frame assembly and adjustment device 10 is located in the middle of the upper platform 31 and is fixedly connected to the upper platform 31; the adjustment rod 12 and the shape adjustment device 13 of the launch vehicle sheet metal frame assembly and adjustment device 10 extend from the assembly port of the upper platform 31 to its lower part to adjust the sheet metal frame 20 located inside the launch vehicle section.

[0035] Optionally, all columns 33 are located on the same circumference and evenly distributed on that circumference, thus ensuring that all columns 33 are evenly distributed between the upper platform 31 and the base 32. This allows the assembly frame 30 to provide shape positioning for the launch vehicle section while also ensuring more even stress distribution on the assembly frame 30. Alternatively, the upper platform 31 is provided with threaded fixing holes located inside the positioning holes. Fixing bolts pass through the fixing holes on the fixing part 111 of the connecting frame 11 and are screwed into the threaded fixing holes of the upper platform 31, thereby achieving a fixed connection between the connecting frame 11 and the upper platform 31. Furthermore, the connecting frame 11 and the upper platform 31 are fixed together by bolts, facilitating disassembly.

[0036] In use, the front frame is fixedly connected to the upper platform 31 (by bolts to the positioning holes of the upper platform 31), and the rear frame is fixedly connected to the base 32 (by bolts to the positioning holes of the base 32). The stringers and skin are connected between the front and rear frames, thus initially completing the assembly of the launch vehicle section. Then, the sheet metal frame 20 is placed into the adjustment slot of the shape limiting block 131, and the position of the limiting block 133 is adjusted by turning the adjusting bolt 132 so that the inner surface of the limiting block 133 fits against the outer surface of the sheet metal frame 20. Then, the adjusting rod 12 is adjusted up and down to make the sheet metal frame 20 reach the required height, thus completing the adjustment of the shape, height, and fit between the sheet metal frame 20 and the section according to the design requirements.

[0037] In the assembly process of the sheet metal frame of the launch vehicle section, this application adopts the form of cooperation between the launch vehicle sheet metal frame assembly adjustment device 10 and the assembly frame 30. The sheet metal frame 20 is fixed by the launch vehicle sheet metal frame assembly adjustment device 10. Multiple sets of adjustment rods 12 are set on the connecting frame 11 according to the actual adjustment requirements. The lower end of the adjustment rod 12 is connected to the shape adjustment device 13. The height of the sheet metal frame 20 is adjusted by adjusting the adjustment rods 12. The shape of the sheet metal frame 20 is adjusted by using the adjustment bolts 132 to push the limit block 133 to adjust the shape of the sheet metal frame 20 to meet the flatness and assembly shape requirements of the sheet metal frame 20.

[0038] like Figure 4 As shown, this application also provides a method for using the assembly and adjustment device for a launch vehicle sheet metal frame, including the following steps:

[0039] Step S41: After the initial assembly of the launch vehicle section is completed, place the sheet metal frame into the adjustment slot of the shape limiting block, and turn the adjusting bolt to adjust the position of the limiting block so that the inner surface of the limiting block fits with the outer surface of the sheet metal frame.

[0040] After connecting the stringers and skin between the front and rear frames, the assembly of the launch vehicle section is initially completed. Then, the connecting frame 11 of the launch vehicle sheet metal frame assembly adjustment device 10 is fixedly connected to the upper platform 31. Then, the height of the adjustment rod 12 is initially adjusted, and the sheet metal frame is placed into the adjustment groove of the shape limiting block. Then, the adjustment bolt is turned to adjust the position of the limiting block so that the inner surface of the limiting block fits with the outer surface of the sheet metal frame.

[0041] Step S42: Use a height measuring tool to measure the height of the upper plane of the sheet metal frame. Based on the height measurement results, the shape of the launch vehicle section, and the gap between the sheet metal frame and the launch vehicle section, adjust the position of the adjusting rod to complete the coarse adjustment of the height of the sheet metal frame.

[0042] Based on the required accuracy of the sheet metal frame 20's height, a height gauge or laser measuring instrument is used to measure the height of the upper plane of the sheet metal frame 20. The measurement positions are selected on the left and right sides of each adjusting rod 12. Then, based on the height measurement results, combined with the shape of the launch vehicle section and the gap between the sheet metal frame 20 and the launch vehicle section, the position of the adjusting rod 12 is adjusted again to coarsely adjust the height of the sheet metal frame 20, ensuring that the height error of the sheet metal frame 20 is within 0.2mm.

[0043] For example, if the height measurement result differs significantly from the required height of the sheet metal frame 20, the outer dimensions of the launch vehicle section are large, and the gap between the sheet metal frame 20 and the launch vehicle section is large, then the position of the adjusting rod 12 should be adjusted to a greater extent.

[0044] Step S43: Based on the fit between the sheet metal frame and the rocket section and the fit between the sheet metal frame and the limiting block, adjust the adjusting bolts to finely adjust the height of the sheet metal frame.

[0045] Then, based on the fit between the sheet metal frame 20 and the rocket section and the fit between the sheet metal frame 20 and the limiting block 133, the adjusting bolt 132 is adjusted to finely adjust the height of the sheet metal frame 20 so that the measurement results meet the usage requirements and can achieve a size adjustment at the level of 0.01mm.

[0046] For example, if the gap between the sheet metal frame 20 and the contact position of the launch vehicle section is large, and the gap between the sheet metal frame 20 and the limiting block 133 is large, then the position of the adjusting bolt 132 should be adjusted to a larger extent.

[0047] Step S44: After fine-tuning is completed, fix the sheet metal frame to the stringers and skin of the launch vehicle section;

[0048] After adjusting the sheet metal frame 20, holes are drilled in the sheet metal frame 20, and positioning pins are used to fix the sheet metal frame 20 to the stringers and skin, thereby completing the assembly of the sheet metal frame 20.

[0049] This application achieves adjustment of the height, flatness, and overall dimensions of the sheet metal frame 20 by using a connecting frame 11 on the assembly jig 30 in conjunction with multiple sets of shape adjustment devices 13 and adjustment rods 12. This method does not damage the sheet metal frame 20, makes it easy to use, and avoids increasing the weight of the launch vehicle section. Furthermore, different sizes of connecting frames 11 can be used depending on the launch vehicle section, enabling the assembly of sheet metal frames 20 for launch vehicle sections of different diameters, reducing the manufacturing cost of the sheet metal frame 20 and meeting the high-precision assembly requirements. In addition, this application can be used with existing riveting jigs for launch vehicle sections; only the addition of the launch vehicle sheet metal frame assembly adjustment device 10 is needed to achieve the high-precision assembly requirements of the sheet metal frame 20.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A launch vehicle sheet metal frame assembly adjustment device, comprising: include: The system includes a connecting frame, multiple adjusting rods, and multiple shape adjustment devices. The connecting frame is a regular polygon or an irregular shape, and each of its side frames has an adjustment hole that runs vertically through the middle. Each adjusting rod passes through an adjustment hole and can move vertically along the adjustment hole. Each corner of the connecting frame has an outwardly extending fixing part for fixing to the upper platform of the assembly frame; The shape adjustment device includes: a shape limiting block, multiple adjusting bolts, and multiple limiting blocks; wherein, the upper surface of each shape limiting block is connected to the lower end of an adjusting rod, and it has an adjusting groove with an opening opposite to the central axis of the connecting frame, and each shape limiting block has multiple threaded adjusting holes that penetrate inside and outside; the multiple limiting blocks are located in the adjusting groove, each adjusting bolt is screwed into the threaded adjusting hole, and its inner end extends into the adjusting groove and abuts against the outer surface of the limiting block, and the outer end of each adjusting bolt is located on the outside of the shape limiting block; The upper sidewall of the adjustment groove extends horizontally, the lower sidewall of the adjustment groove gradually slopes downward from back to front, and the rear sidewall of the adjustment groove extends vertically.

2. The launch vehicle sheet metal frame assembly adjustment device of claim 1, wherein, The fixing part has a through fixing hole for passing through fixing bolts to fix it to the upper platform of the assembly frame.

3. The launch vehicle sheet metal frame assembly adjustment device of claim 1 or 2, wherein, The adjusting hole is a threaded hole, and the adjusting rod is a lead screw. The adjusting rod is threadedly engaged with the adjusting hole.

4. The launch vehicle sheet metal frame assembly adjustment device of claim 1 or 2, wherein, The shape limiting block and the adjusting rod are connected by a single-degree-of-freedom rotary joint.

5. A launch vehicle stage assembly apparatus, characterized by, include: An assembly frame and a launch vehicle sheet metal frame assembly and adjustment device as described in any one of claims 1 to 4; wherein the assembly frame includes: an upper platform, a base, and multiple columns; The upper platform and the base are each provided with one or more rings of positioning holes for fixed connection with the front and rear frames of the launch vehicle section, respectively. The upper platform has a through-hole assembly opening in the middle. The upper end of each column is connected to the lower surface of the upper platform near the outer side and is located outside the positioning hole of the upper platform. The lower end of each column is connected to the upper surface of the base near the outer side and is located outside the positioning hole of the base. The length of all columns is adjustable. The connecting frame of the launch vehicle sheet metal frame assembly and adjustment device is located in the middle of the upper platform and is fixedly connected to the upper platform; the adjustment rod and shape adjustment device of the launch vehicle sheet metal frame assembly and adjustment device extend from the assembly port of the upper platform to its lower part.

6. The launch vehicle cabin section assembly apparatus of claim 5, wherein, All the columns are located on the same circumference and are evenly distributed on the circumference.

7. The launch vehicle cabin section assembly apparatus of claim 5 or 6, wherein, The upper platform is provided with an inner threaded fixing hole located in the positioning hole. The fixing bolt passes through the fixing hole on the fixing part of the connecting frame and is screwed into the threaded fixing hole of the upper platform to fix the connecting frame to the upper platform.

8. A method of using a launch vehicle sheet metal frame assembly adjustment device, the method comprising: The assembly and adjustment device for the sheet metal frame of a launch vehicle as described in any one of claims 1 to 4 includes the following steps: Step S41: After the initial assembly of the launch vehicle section is completed, place the sheet metal frame into the adjustment slot of the shape limiting block, and turn the adjusting bolt to adjust the position of the limiting block so that the inner surface of the limiting block fits with the outer surface of the sheet metal frame. Step S42: Use a height measuring tool to measure the height of the upper plane of the sheet metal frame. Based on the height measurement results, the shape of the launch vehicle section, and the gap between the sheet metal frame and the launch vehicle section, adjust the position of the adjusting rod to complete the coarse adjustment of the height of the sheet metal frame. Step S43: Based on the fit between the sheet metal frame and the rocket section and the fit between the sheet metal frame and the limiting block, adjust the adjusting bolts to finely adjust the height of the sheet metal frame. Step S44: After fine-tuning is completed, fix the sheet metal frame to the stringers and skin of the launch vehicle section.

Images