Carrier rocket cabin section assembling device, sheet metal frame assembling and adjusting device and using method of sheet metal frame assembling and adjusting device

Abstract

The invention relates to a carrier rocket metal plate frame assembling and adjusting device which comprises a connecting frame, an adjusting rod and a shape adjusting device. The connecting frame is in a regular polygon shape or a special shape, and a through adjusting hole is formed in the middle of a frame of the connecting frame. The adjusting rod penetrates through the adjusting hole and can move up and down along the adjusting hole; the shape adjusting device comprises a shape limiting block, an adjusting bolt and a limiting block; the upper surface of the shape limiting block is connected to the lower end of the adjusting rod, and the shape limiting block is provided with an adjusting groove with an opening deviating from the center shaft of the connecting frame and a threaded adjusting hole penetrating through 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 on the outer side of the appearance limiting block. The metal plate frame can be adjusted without damage, the weight and the manufacturing cost of the carrier rocket cabin section are prevented from being increased, and the metal plate frame is convenient to adjust.

Description

Technical Field

[0001] The present application relates to the field of aerospace machinery assembly technology, and in particular to a launch vehicle compartment 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 Art

[0002] The sheet metal frame of a launch vehicle serves as the "ribs" of the rocket, and together with the stringers, skin, etc., it forms the rocket body structure, providing overall frame support for the rocket, maintaining the rocket's shape, and bearing the various loads the rocket is subjected to during transportation, launch, and flight. It also transmits and distributes the forces borne by various parts of the rocket, ensuring the rational transmission of force in the rocket body structure, enabling the rocket to withstand huge external forces such as thrust and aerodynamics.

[0003] Currently, sheet metal frames for rocket body structures are primarily 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 part dimensions. However, due to mechanical and other material properties, the sheet metal frame can experience variations after forming (for example, springback), resulting in deviations between the actual and theoretical dimensions. This can lead to interference during assembly, excessive part flatness, and deformation that prevents assembly.

[0004] Currently, sheet metal frames can be reshaped using tools such as a wooden hammer. However, since the frame has already been hardened, this can easily cause cracks in the material, resulting in the scrapping of the part. Alternatively, the deformed parts can be polished, but this can easily lead to part thinning and reduced mechanical properties. Alternatively, assembly gaps can be eliminated by adding gaskets, but this can easily increase the weight of the launch vehicle compartment. Currently, the height of the sheet metal frame is adjusted primarily by using a jack on the upper or lower surface of the frame. This height adjustment requires 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 compartment so that the adjustment of the sheet metal frame is convenient is a technical problem that technicians in this field urgently need to solve. Summary of the Invention

[0006] The present application provides a launch vehicle sheet metal frame assembly and adjustment device and a method for using the same. By arranging a connecting frame on an assembly jig in conjunction with multiple sets of shape adjustment devices and screw rods, the height, flatness and shape dimensions of the sheet metal frame can be adjusted. This device does not damage the sheet metal frame parts and is easy to use. Connecting frames of different sizes can be used according to different cabin sections to assemble sheet metal frames of launch vehicle cabins of different diameters, thereby reducing the manufacturing cost of the sheet metal frame and meeting the high-precision sheet metal frame assembly requirements.

[0007] To solve the above technical problems, this application provides the following technical solutions:

[0008] A launch vehicle sheet metal frame assembly and adjustment device comprises: a connecting frame, a plurality of adjustment rods, and a plurality of shape adjustment devices; wherein the connecting frame is in the shape of a regular polygon or a special shape, and the middle portion of each frame thereof has an adjustment hole extending vertically; each adjustment 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 adjustment bolts and multiple limit blocks; wherein, the upper surface of each shape limiting block is connected to the lower end of an adjustment rod, and it has an adjustment groove with an opening facing away from the central axis of the connecting frame, and each shape limiting block has multiple threaded adjustment holes passing through the inside and outside; multiple limit blocks are located in the adjustment groove, each adjustment bolt is screwed into the threaded adjustment hole, and its inner end extends into the adjustment groove and presses against the outer surface of the limit block, and the outer end of each adjustment bolt is located on the outside of the shape limiting block.

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

[0011] In the launch vehicle sheet metal frame assembly and adjustment device as described above, preferably, the fixing portion has a fixing hole that passes through from top to bottom, for passing the fixing bolts to achieve fixation with the upper platform of the assembly jig.

[0012] In the launch vehicle sheet metal frame assembly and adjustment device as described above, preferably, the adjustment hole is a threaded hole, the adjustment rod is a screw rod, and the adjustment rod is threadedly matched with the adjustment hole.

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

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

[0015] A launch vehicle compartment assembly device, characterized in that it comprises: an assembly jig and a launch vehicle sheet metal frame assembly and adjustment device as described in any one of the above items; wherein the assembly jig comprises: an upper platform, a base and a plurality of columns; the upper platform and the base are each distributed with one or more circles of positioning holes for fixedly connecting with the front end frame and the rear end frame of the launch vehicle compartment, respectively, and the middle part of the upper platform has an assembly opening that passes through from top to bottom; the upper end of each column is connected to the part of the lower surface of the upper platform close to the outside and is located outside the positioning hole of the upper platform, and the lower end of each column is connected to the part of the upper surface of the base close to the outside 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 and adjustment device is located in the middle part of the upper platform and is fixedly connected to the upper platform; the adjustment rod and the shape adjustment device of the launch vehicle sheet metal frame assembly and adjustment device extend from the assembly opening of the upper platform to the bottom thereof.

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

[0017] In the launch vehicle compartment assembly device as described above, preferably, a threaded fixing hole located inside the positioning hole is provided on the upper platform, 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 fixation of the connecting frame and the upper platform.

[0018] A method for using a launch vehicle sheet metal frame assembly and adjustment device, which is applied to the launch vehicle sheet metal frame assembly and adjustment device described in any of the above items, comprises the following steps: step S41, after preliminarily completing the assembly of the launch vehicle cabin, placing the sheet metal frame into the adjustment slot of the shape limiting block, and turning 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, using a height measuring tool to measure the height of the upper plane of the sheet metal frame, and adjusting the position of the adjusting rod according to the height measurement result and the shape of the launch vehicle cabin and the gap between the sheet metal frame and the launch vehicle cabin to complete the coarse adjustment of the height of the sheet metal frame; step S43, adjusting the adjusting bolt to fine-tune the height of the sheet metal frame according to the matching state of the contact position between the sheet metal frame and the launch vehicle cabin and the degree of fit between the sheet metal frame and the limiting block; step S44, after the fine adjustment is completed, the sheet metal frame is fixedly connected to the trusses and skin of the launch vehicle cabin.

[0019] Compared to the above-mentioned background technology, the present application adjusts the height and flatness of the sheet metal frame by setting a connecting frame on the assembly jig in conjunction with multiple sets of shape adjustment devices and adjustment rods. This has the effect of not damaging the sheet metal frame, and can make it easy to use and avoid increasing the weight of the launch vehicle compartment. In addition, different sizes of connecting frames can be matched according to the different launch vehicle compartments to achieve the assembly of sheet metal frames for launch vehicle compartments with different diameters, reduce the manufacturing cost of the sheet metal frames, and meet the high-precision sheet metal frame assembly requirements. In addition, the present application can be coordinated with the existing riveted jigs of the launch vehicle compartments. Only by adding the launch vehicle sheet metal frame assembly adjustment device can the high-precision requirements of the sheet metal frame assembly be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the launch vehicle sheet metal frame assembly and adjustment device of the present application;

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

[0023] Figure 3 is a schematic diagram of the launch vehicle compartment assembly device of the present application;

[0024] Figure 4 This is a flow chart of a method for using the launch vehicle sheet metal frame assembly and adjustment device of the present application. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0026] like Figure 1As shown, the present application provides a launch vehicle sheet metal frame assembly and adjustment device 10, comprising: a connecting frame 11, a plurality of adjustment rods 12, and a plurality of shape adjustment devices 13; wherein the connecting frame 11 is a regular polygon or a special shape (its shape can be determined according to the shape of the sheet metal frame and the adjustment requirements), and the middle portion of each frame of the connecting frame 11 has an adjustment hole that passes through the upper and lower parts; each adjustment rod 12 passes through an adjustment hole, and each adjustment rod 12 can move up and down along the adjustment hole. In the present application, different numbers of adjustment rods 12 and shape adjustment devices 13 can be provided according to the different precision requirements of the shape and size of the sheet metal frame, thereby achieving different precision adjustments of the sheet metal frame.

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

[0028] During use, the sheet metal frame 20 (for example: the most demanding conical sheet metal frame in the assembly of the launch vehicle compartment) is placed in the adjustment slot of the shape limiting block 131, and the adjusting bolt 132 is turned to adjust the position of the limit block 133 so that the inner surface of the limit block 133 fits with the outer surface of the sheet metal frame 20. The adjusting rod 12 is adjusted up and down so that the sheet metal frame 20 is at the required height, thereby adjusting the shape, height and fit between the sheet metal frame 20 and the compartment according to the design requirements.

[0029] Optionally, the connecting frame 11 is a regular octagon. Also optionally, each corner of the connecting frame 11 extends outwardly from a fixing portion 111 for securing to the upper platform of the assembly jig. Furthermore, optionally, the fixing portion 111 has a through-hole for passing a fixing bolt through it, thereby achieving a fixed connection to the upper platform of the assembly jig. Still optionally, the adjustment hole is a threaded hole, and the adjustment rod 12 is a screw, with the adjustment rod 12 threadedly mating with the adjustment 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 rotational pair. A single-degree-of-freedom rotational pair refers to a connection method between two components that only allows them to rotate relative to each other around a specific axis, while restricting movement in other directions. The single-degree-of-freedom rotational pair ensures that when the adjustment rod 12 rotates, the constraint direction of the shape adjustment device 13 remains unchanged.

[0031] Optionally, the upper side wall of the adjustment slot extends horizontally, and the lower side wall of the adjustment slot extends gradually downward from the back to the front, wherein the "front" is the same direction as the opening of the adjustment slot, and the rear side wall of the adjustment slot extends vertically. The extension of the upper side wall, lower side wall and rear side wall of the adjustment slot limits the shape of the shape limiting block 131 and its adjustment slot. Optionally, the position and number of the adjustment bolts 132 and the limit blocks 133 can be set according to the cross-sectional requirements of the sheet metal frame. By replacing the shape limiting blocks 131 of different shapes, the requirements for adjusting the shape of sheet metal frames of different shapes can be met. In addition, by replacing the shape limiting blocks 131 of different sizes, the requirements for adjusting the shape of sheet metal frames of different sizes can be met. Therefore, the present application can realize the adjustment and assembly of sheet metal frames of various cross-sections through a set of sheet metal frame assembly and adjustment devices 10.

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

[0033] The upper platform 31 and the base 32 are both provided with one or more circles of positioning holes, which are used to be fixedly connected to the front end frame and the rear end frame of the launch vehicle compartment respectively, and the middle part of the upper platform 31 has an assembly opening that passes through from top to bottom, which is used to install the skin and trusses of the launch vehicle compartment; the upper end of each column 33 is connected to the part of the lower surface of the upper platform 31 close to the outside, and is located outside the positioning hole of the upper platform 31, and the lower end of each column 33 is connected to the part of the upper surface of the base 32 close to the outside, and is located outside the positioning hole of the base 32, so as to avoid the column 33 from interfering with the connection between the upper platform 31 and the front end frame and the connection between the base 32 and the rear end frame; in addition, the length of all columns 33 is adjustable, so that when assembling the launch vehicle compartment, the length of the column 33 can be adjusted to adapt to the height of the launch vehicle compartment 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 part 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 bottom to adjust the sheet metal frame 20 located on the inner side of the launch vehicle compartment.

[0035] Optionally, all the columns 33 are located on the same circumference and are evenly distributed on the circumference, so that all the columns 33 are evenly distributed between the upper platform 31 and the base 32. This allows the assembly jig 30 to provide a more uniform force on the assembly jig 30 while providing a shape positioning function for the launch vehicle compartment. Optionally, threaded fixing holes are provided on the upper platform 31, and the threaded fixing holes are located inside the positioning holes. The fixing bolts pass through the fixing holes on the fixing portion 111 of the connecting frame 11 and are screwed into the threaded fixing holes on the upper platform 31, thereby achieving a fixed connection between the connecting frame 11 and the upper platform 31. The connecting frame 11 and the upper platform 31 are fixed by bolts, which facilitates disassembly.

[0036] During use, the front frame is fixedly connected to the upper platform 31 (by bolting to the positioning holes of the upper platform 31), the rear frame is fixedly connected to the base 32 (by bolting to the positioning holes of the base 32), and the trusses and skin are connected between the front frame and the rear frame, thereby preliminarily completing the assembly of the launch vehicle cabin. Then, the sheet metal frame 20 is placed in the adjustment slot of the shape limiting block 131, and the adjustment bolt 132 is turned to adjust the position of the limit block 133 so that the inner surface of the limit block 133 is aligned with the outer surface of the sheet metal frame 20. Then, the adjustment rod 12 is adjusted up and down so that the sheet metal frame 20 is at the desired height, thereby completing the adjustment of the shape, height and fit of the sheet metal frame 20 with the cabin according to the design requirements.

[0037] During the assembly process of the sheet metal frame of the launch vehicle cabin section, the present application adopts the form of cooperating the launch vehicle sheet metal frame assembly and adjustment device 10 with the assembly jig 30, fixing the sheet metal frame 20 by the launch vehicle sheet metal frame assembly and adjustment device 10, and setting multiple groups of adjustment rods 12 on the connecting frame 11 according to actual adjustment requirements, connecting the shape adjustment device 13 to the lower end of the adjustment rod 12, adjusting the height of the sheet metal frame 20 by the adjustment rod 12, and using the adjustment bolt 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, the present application also provides a method for using a launch vehicle sheet metal frame assembly and adjustment device, comprising the following steps:

[0039] Step S41: After the launch vehicle compartment is preliminarily assembled, place the sheet metal frame into the adjustment slot of the shape limiting block, and adjust the position of the limiting block by turning the adjustment bolts so that the inner surface of the limiting block fits the outer surface of the sheet metal frame;

[0040] After connecting the trusses and skins between the front frame and the rear frame, the assembly of the launch vehicle compartment is preliminarily completed. Then, the connecting frame 11 of the launch vehicle sheet metal frame assembly and adjustment device 10 is fixedly connected to the upper platform 31, and then the height of the adjustment rod 12 is preliminarily adjusted. The sheet metal frame is placed in the adjustment groove of the shape limiting block, and then the adjustment bolt is turned to adjust the position of the limit block so that the inner surface of the limit 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 result, the shape of the launch vehicle compartment, and the gap between the sheet metal frame and the launch vehicle compartment, adjust the position of the adjustment rod to complete the rough adjustment of the height of the sheet metal frame.

[0042] Depending on the required height accuracy of the sheet metal frame 20, a height gauge or laser measuring instrument is used to measure the height of the upper surface of the sheet metal frame 20. Measurements are made on the left and right sides of each adjustment rod 12. Based on the height measurement results, the clearance between the launch vehicle compartment and the sheet metal frame 20 and the contact area is determined, and the position of the adjustment rods 12 is adjusted again to roughly adjust the height of the sheet metal frame 20, ensuring that the height error of the sheet metal frame 20 is within 0.2 mm.

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

[0044] Step S43: fine-tune the height of the sheet metal frame by adjusting the adjustment bolts according to the matching state of the contact position between the sheet metal frame and the launch vehicle compartment and the fit between the sheet metal frame and the limit block;

[0045] Then, according to the matching state of the contact position between the sheet metal frame 20 and the launch vehicle compartment and the degree of fit between the sheet metal frame 20 and the limit block 133, the adjustment bolt 132 is adjusted to fine-tune the height of the sheet metal frame 20 so that the measurement results meet the use requirements and the size adjustment at the 0.01mm level can be achieved.

[0046] For example, if the gap between the sheet metal frame 20 and the launch vehicle compartment is large, and the gap between the sheet metal frame 20 and the limit block 133 is large, the position of the adjustment bolt 132 is adjusted to a greater extent.

[0047] Step S44: After the fine adjustment is completed, the sheet metal frame is fixedly connected to the stringers and skin of the launch vehicle compartment;

[0048] After the adjustment of the sheet metal frame 20 is completed, holes are made in the sheet metal frame 20 , and the sheet metal frame 20 is fixedly connected to the trusses and the skin using positioning pins, thereby completing the assembly of the sheet metal frame 20 .

[0049] The present application achieves adjustment of the height and flatness dimensions of the sheet metal frame 20 by providing a connecting frame 11 on the assembly jig 30 in conjunction with multiple sets of shape adjustment devices 13 and adjustment rods 12. This has the effect of not damaging the sheet metal frame 20, and can be convenient to use, avoiding increasing the weight of the launch vehicle compartment. In addition, different sizes of connecting frames 11 can be used according to different launch vehicle compartments to achieve assembly of sheet metal frames 20 for launch vehicle compartments of different diameters, reducing the manufacturing cost of the sheet metal frames 20 and meeting the high-precision assembly requirements of the sheet metal frames 20. In addition, the present application can be coordinated with the existing riveted jigs of launch vehicle compartments. Only by adding the launch vehicle sheet metal frame assembly adjustment device 10 can the high-precision assembly requirements of the sheet metal frame 20 be achieved.

[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 embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0051] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A launch vehicle sheet metal frame assembly and adjustment device, characterized in that: include: A connecting frame, a plurality of adjustment rods, and a plurality of shape adjustment devices; wherein the connecting frame is a regular polygon or a special shape, and the middle portion of each frame thereof has an adjustment hole extending through the upper and lower parts; each adjustment rod passes through an adjustment hole and can move up and down along the adjustment hole; The shape adjustment device includes: a shape limiting block, multiple adjustment bolts and multiple limit blocks; wherein, the upper surface of each shape limiting block is connected to the lower end of an adjustment rod, and it has an adjustment groove with an opening facing away from the central axis of the connecting frame, and each shape limiting block has multiple threaded adjustment holes passing through the inside and outside; multiple limit blocks are located in the adjustment groove, each adjustment bolt is screwed into the threaded adjustment hole, and its inner end extends into the adjustment groove and presses against the outer surface of the limit block, and the outer end of each adjustment bolt is located on the outside of the shape limiting block.

2. The launch vehicle sheet metal frame assembly and adjustment device according to claim 1, characterized in that: A fixing portion extends outward from each top corner of the connecting frame and is used to be fixed to the upper platform of the assembly frame.

3. The launch vehicle sheet metal frame assembly and adjustment device according to claim 2, characterized in that: The fixing portion has a fixing hole that passes through the upper and lower parts and is used for passing the fixing bolts to achieve fixation with the upper platform of the assembly frame.

4. The launch vehicle sheet metal frame assembly and adjustment device according to any one of claims 1 to 3, characterized in that: The adjusting hole is a threaded hole, the adjusting rod is a screw rod, and the adjusting rod is matched with the thread of the adjusting hole.

5. The launch vehicle sheet metal frame assembly and adjustment device according to any one of claims 1 to 3, characterized in that: The shape limiting block and the adjusting rod are connected by a single-degree-of-freedom rotation pair.

6. The launch vehicle sheet metal frame assembly and adjustment device according to any one of claims 1 to 3, characterized in that: The upper side wall of the adjustment groove extends horizontally, the lower side wall of the adjustment groove extends gradually downward from the back to the front, and the rear side wall of the adjustment groove extends vertically.

7. A launch vehicle compartment assembly device, characterized in that: include: An assembly jig and a launch vehicle sheet metal frame assembly and adjustment device according to any one of claims 1 to 6; wherein the assembly jig comprises: an upper platform, a base, and a plurality of columns; The upper platform and the base are both provided with one or more circles of positioning holes for fixed connection with the front and rear frames of the launch vehicle compartment, respectively. The middle portion of the upper platform has an assembly opening that passes through from top to bottom. 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 part 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 bottom.

8. The launch vehicle compartment assembly device according to claim 7, characterized in that: All the columns are located on the same circumference and are evenly distributed on the circumference.

9. The launch vehicle compartment assembly device according to claim 7 or 8, characterized in that: The upper platform is provided with a threaded fixing hole located inside 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 and the upper platform.

10. A method for using a launch vehicle sheet metal frame assembly and adjustment device, characterized in that: The launch vehicle sheet metal frame assembly and adjustment device according to any one of claims 1 to 6 comprises the following steps: Step S41: After the launch vehicle compartment is preliminarily assembled, place the sheet metal frame into the adjustment slot of the shape limiting block, and adjust the position of the limiting block by turning the adjustment bolts so that the inner surface of the limiting block fits 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 result, the shape of the launch vehicle compartment, and the gap between the sheet metal frame and the launch vehicle compartment, adjust the position of the adjustment rod to complete the rough adjustment of the height of the sheet metal frame. Step S43: fine-tune the height of the sheet metal frame by adjusting the adjustment bolts according to the matching state of the contact position between the sheet metal frame and the launch vehicle compartment and the fit between the sheet metal frame and the limit block; Step S44: After the fine adjustment is completed, the sheet metal frame is fixedly connected to the stringers and skin of the launch vehicle compartment.

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