Loop quantization compensation sectioning grid cylinder structure

Abstract

The invention discloses a ring vectorization compensation sectioning grid cylinder structure which comprises a large wall plate and a small wall plate. The large wall plate and the small wall plate are both in an arc shape. One end of the large wall plate is connected with one end of the small wall plate; and the other end of the large wall plate is connected with the other end of the small wall plate. According to the invention, high precision of manufacturing of the cylindrical structural member is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of integrated aerospace structure design and manufacturing, and in particular relates to a ring-shaped quantized compensation petal grid tube structure. Background Art

[0002] As a classic lightweight, high-rigidity, high-reliability and well-sealed structure, the integral grid wall panel has been widely used in the aerospace field, especially in large-scale aerospace aluminum alloy cabin structures in recent years. In order to further improve the aircraft carrying coefficient, the integral grid wall panel cabin is rapidly replacing the traditional skin-strip cabin structure. According to the global launch vehicle cabin structure survey, except for the small-diameter integral barrel section, most of the rocket cabin sections currently use two-petal, three-petal or four-petal equally divided grid wall panels for welding or bolting, thereby forming a complete circular cabin assembly.

[0003] However, as the mechanical properties of the structural load and the installation requirements of functional parts become more and more complex, the uniform petal division has limited the further lightweight design of the structure. At the same time, the adaptability of functional changes is hindered. The product can no longer give full play to the structural advantages. The further lightweighting of this type of structure faces huge difficulties. In addition, with the increase in the diameter of the rocket body and the load-bearing requirements, the general roll-bending forming process is difficult to ensure the forming accuracy of the overall wall panel parts based on the large size and high rib thickness ratio of the grid cylinder structure, which seriously affects the assembly of the cylinder assembly, especially in the welding process of the cylinder body. The traditional butt joint structure solution must introduce heavy tooling control with internal support and external pressure for welding, which not only has low assembly and welding efficiency but also extremely high tooling costs. Summary of the invention

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a ring-shaped quantized compensation petal grid tube structure, and to achieve high-precision manufacturing of the cylindrical structural parts.

[0005] The object of the present invention is achieved through the following technical scheme: a ring-shaped quantitative compensation petal grid tube structure, comprising: a large wall panel and a small wall panel; wherein the large wall panel and the small wall panel are both arc-shaped; one end of the large wall panel is connected to one end of the small wall panel; the other end of the large wall panel is connected to the other end of the small wall panel.

[0006] In the above-mentioned annular quantized compensation petal grid tube structure, the large wall panel includes a grid and a thin skin area; wherein the grid and the thin skin area are connected.

[0007] In the above-mentioned annular quantitative compensation petal grid tube structure, the small wall panel includes a second grid, a second thin skin area and a special-shaped boss; wherein the second grid is connected to the second thin skin area; the special-shaped boss is connected to the second thin skin area; and the special-shaped boss is located in the middle of the second grid.

[0008] In the above-mentioned annular quantitative compensation petal grid tube structure, the production steps of the large wall panel include: processing the flat plate into a grid flat plate through a mechanical milling process; cleaning the grid flat plate; roller bending the cleaned grid flat plate through a roller bending tool to form a high-rib grid wall panel structure; and removing the elastic straight edge of the high-rib grid wall panel structure to obtain a large wall panel.

[0009] In the above-mentioned annular quantitative compensation petal grid cylinder structure, the roller bending tooling includes a first driving wheel, a second driving wheel and a driven wheel; wherein, one surface of the cleaned grid plate is pressed against the driven wheel; the other surface of the cleaned grid plate is pressed against the first driving wheel and the second driving wheel respectively; the first driving wheel and the second driving wheel are symmetrical about the vertical perpendicular line of the driven wheel.

[0010] In the above-mentioned annular quantized compensation petal grid tube structure, the single-side roll bending residual angle α of the wall panel is greater than the effective roll bending angle β.

[0011] In the above-mentioned annular quantitative compensation petal grid tube structure, the arc length of the elastic straight line side is (α-β)πR / 180, and the arc length of the elastic straight line side is between 50 times and 100 times the thickness T of the high-rib grid wall panel structure.

[0012] In the above-mentioned annular quantized compensation petal grid tube structure, one end of the large wall plate is welded to one end of the small wall plate; and the other end of the large wall plate is welded to the other end of the small wall plate.

[0013] In the above-mentioned annular quantitative compensation petal grid tube structure, the welding steps include: using a flexible cable to keep one end of the large wall panel and one end of the small wall panel fixed in a limited position through a locking bottom structure, and using a flexible cable to keep the other end of the large wall panel and the other end of the small wall panel fixed in a limited position through a locking bottom structure; welding one end of the large wall panel to one end of the small wall panel; welding the other end of the large wall panel to the other end of the small wall panel.

[0014] In the above-mentioned annular quantitative compensation petal grid tube structure, the thickness t of the bottom locking structure is between 0.5 and 0.9 times the wall thickness T of the tube structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention breaks through the limitations of traditional uniform petal structure design and improves the adaptability of the on-demand distribution design of cabin structure stiffness;

[0017] (2) The present invention proposes a method for milling and edge removal of roll-formed high-ribbed wall panels, which solves the problem of edge deformation of high-ribbed grid wall panels, avoids the edge rebound effect of thick wall panels, and provides conditions for achieving high-precision shape and position control of cabin tube parts;

[0018] (3) The present invention proposes a new welding scheme for the local bottom locking structure of the petal wall panel based on circumference control, which can effectively adapt to the quantitative compensation of the circumferential size of the cabin tube parts and ensure the overall size of the structure;

[0019] (4) The present invention proposes a method for self-supporting locking welding and assembly of flexible cables for cabin tube parts, which realizes structural adaptive compensation and structural self-supporting circular welding, avoids the complex and rigid welding tooling of traditional internal support and external pressure, reduces welding manufacturing costs, and realizes convenient manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the structure of the ring quantization compensation petal grid tube provided by an embodiment of the present invention;

[0022] Figure 2 is a manufacturing flow chart of a grid wall panel provided by an embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the roll bending quantization and the straight edge dimension removal of the grid wall panel provided by an embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of the principle of the grid cylinder soft binding support lock bottom welding structure provided by an embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram of the pre-welding dimensions and bottom locking structure of the grid wall panel provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] Figure 1 Schematic diagram of the structure of the ring quantization compensation petal grid tube provided by the embodiment of the present invention. Figure 1 As shown, the annular quantitative compensation petal grid tube structure includes: a large wall panel 1 and a small wall panel 2; wherein the large wall panel 1 and the small wall panel 2 are both arc-shaped; one end of the large wall panel 1 is connected to one end of the small wall panel 2; and the other end of the large wall panel 1 is connected to the other end of the small wall panel 2.

[0028] like Figure 1 As shown, the large wall panel 1 comprises a grid 11 and a thin skin region 12, wherein the grid 11 and the thin skin region 12 are connected.

[0029] like Figure 1 As shown, the small wall panel 2 includes a second grid 21, a second thin skin area 22 and a special-shaped boss 23; wherein the second grid 21 is connected to the second thin skin area 22; the special-shaped boss 23 is connected to the second thin skin area 22; and the special-shaped boss 23 is located in the middle of the second grid 21.

[0030] The annular quantized compensation grid cylinder is composed of a large wall panel 1 and a small wall panel 2, wherein the large wall panel 1 is composed of features such as a uniform grid 11 and a thin skin area 12, and the small wall panel 2 is composed of features such as a second grid 21, a second thin skin area 22, and a special-shaped boss 23. Both the large wall panel 1 and the small wall panel 2 can be formed by roll bending, and the two are connected into a whole by welding.

[0031] like Figure 2 As shown, the manufacturing steps of the large wall panel 1 include: processing the flat plate into a grid flat plate by a mechanical milling process; cleaning the grid flat plate; roller-bending the cleaned grid flat plate by a roller bending tool to form a high-rib grid wall panel structure; and removing the elastic straight edges of the high-rib grid wall panel structure to obtain the large wall panel 1.

[0032] like Figure 3 As shown, the roller bending tooling includes a first driving wheel 31, a second driving wheel 32 and a driven wheel 4; wherein one surface of the cleaned grid plate is pressed against the driven wheel 4; the other surface of the cleaned grid plate is pressed against the first driving wheel 31 and the second driving wheel 32 respectively; the first driving wheel 31 and the second driving wheel 32 are symmetrical about the vertical perpendicular line of the driven wheel 4. The residual angle α of the single-sided roller bending of the wall panel is greater than the effective roller bending angle β. The arc length of the elastic straight line side is (α-β)πR / 180, and the arc length of the elastic straight line side is between 50 and 100 times the thickness T of the high-rib grid wall panel structure.

[0033] The following is a further detailed description of roll forming control: Figure 2 The panel manufacturing process mainly includes flat plate milling grid, measurement and cleaning, roll bending, de-elastic straight edge and measurement delivery. Figure 3The figure is a schematic diagram of the roll bending quantification of the straight edge size of the grid wall panel. The wall panel is taken as an example of the roll bending of the large wall panel 1. The effective roll bending angle of the roll bending driving wheel and the driven wheel is β, and the single-side roll bending residual angle α of the wall panel must be greater than β. In order to ensure the edge accuracy of the roll-bent wall panel, the de-elastic straight line area should meet the effective area control. The specific preparation implementation method of the wall panel is:

[0034] Step 1: Processing the flat plate into a grid flat plate through a mechanical milling process;

[0035] Step 2: Measure, inspect and clean the machined grid plate size and thin skin area;

[0036] Step 3: Roll-bending the cleaned grid plate to form a high-rib grid wall panel structure;

[0037] Step 4: Remove the elastic straight edge of the roll-bent high-rib grid wall structure according to Figure 3 The inner radius R of the wall panel, the effective roll bending angle β, and the residual roll bending angle α of the wall panel on one side are shown. To ensure the effective removal of the elastic edge, the arc length of the removed cutting edge (α-β)πR / 180 should be between 50 and 100 times the wall panel thickness T.

[0038] Step 5: Measure the circumferential dimensions of the high-rib grid wall structure without straight edges to provide assembly data for subsequent welding

[0039] The manufacturing method of the small wall panel 2 can be the same as that of the large wall panel 1. The difference is that the quantitative compensation amount should match the final size of the main large wall panel 1, thereby ensuring the quantitative compensation effect of the grid cylinder structure ring.

[0040] One end of the large wall panel 1 is welded to one end of the small wall panel 2; the other end of the large wall panel 1 is welded to the other end of the small wall panel 2.

[0041] The welding steps include: using the flexible cable 5 to hold one end of the large wall panel 1 and one end of the small wall panel 2 in a limited position and fix them through the bottom locking structure; using the flexible cable 5 to hold the other end of the large wall panel 1 and the other end of the small wall panel 2 in a limited position and fix them through the bottom locking structure; welding one end of the large wall panel 1 to one end of the small wall panel 2; welding the other end of the large wall panel 1 to the other end of the small wall panel 2. Figure 4 The thickness t of the lock bottom structure is between 0.5 and 0.9 times the wall thickness T of the tube structure.

[0042] Figure 4 This is a schematic diagram of the principle of the grid cylinder soft binding support lock bottom welding structure. The self-tightening assembly before welding utilizes the tightening force of the flexible cable 5 to keep the large wall panel 1 and the small wall panel 2 fixed in place through the lock bottom structure, and utilizes the circumferential force of the flexible cable to achieve self-supporting welding of the cylinder structure. Figure 5The diagram of the mesh wall panel dimensions and bottom locking structure before welding is shown. To ensure the circumferential dimensions and shape and position accuracy of the entire cylinder structure and meet the theoretical dimensional tolerance requirements, the wall panel should be measured for circumferential arc length before assembly welding. On the basis of obtaining the outer arc length A and inner arc length a of the large wall panel 1, the outer arc length B and inner arc length b of the small wall panel 2 are processed in pairs. In addition, to ensure the stability of the self-locking welding structure, the inner thickness t of the local bottom locking structure should be between 0.5-0.9 times the cylinder wall thickness T.

[0043] The annular quantitative compensation non-uniform petal grid cylinder is connected by the main wall plate and the secondary wall plate, which are connected by the bottom locking structure welding. The main wall plate manufacturing process mainly includes flat plate milling grid, measurement and cleaning, roll bending, and then removing the straight edge to effectively remove the curvature difference area caused by the edge effect. After completing the annular dimension measurement, the compensation amount of the secondary wall plate is calculated. The secondary wall plate processed according to the annular compensation amount is assembled and welded with the main wall plate to complete the cylinder structure manufacturing.

[0044] The present embodiment breaks through the limitations of the traditional uniform petal structure design and improves the adaptability of the on-demand distribution design of the cabin structure stiffness; the present embodiment proposes a method for milling and cutting the edges of roll-formed high-rib grid wall panels, which solves the problem of edge deformation of high-rib grid wall panels and avoids the edge rebound effect of thick wall panels, providing conditions for realizing high-precision shape and position control of cabin tube parts; the present embodiment proposes a new welding scheme for the local locking bottom structure of the petal wall panels based on circumference control, which can effectively adapt to the quantitative compensation of the circumferential dimensions of the cabin tube parts and ensure the overall dimensions of the structure; the self-supporting locking welding assembly method for the cabin tube parts of the present embodiment uses a flexible cable to bundle them externally, which realizes structural adaptive compensation and structural self-supporting circular welding, avoids the traditional complex rigid welding tooling with internal support and external pressure, reduces the welding manufacturing cost, and realizes convenient manufacturing.

[0045] This embodiment is based on the structural design concept of the rocket compartment with non-uniform petal wall panels, realizes the manufacturing-oriented structural design process optimization, improves the uniformity of the compartment structure stiffness and the local designability, reduces the precision requirements for the state manufacturing of large-size wall panel parts, and reduces production costs.

[0046] This embodiment is based on the newly proposed roll-bending high-rib wall panel edge milling method, which solves the problem of edge deformation and springback of high-rib grid wall panels, realizes high-precision shape and position control of the edges of thick wall panels, and provides technical conditions for the manufacture of the entire cabin.

[0047] This embodiment is based on the newly proposed circumference control of the circumferential dimensions of the petal wall panel and the new welding scheme of the local bottom locking structure, which reduces the control requirements for the elastic deformation deviation of the roll-bent wall panel, improves the adjustability of the quantitative compensation of the circumferential dimensions of the cylindrical part, and can significantly improve the overall shape and position dimensions of the cylindrical part product structure;

[0048] This embodiment is based on the new lock-bottom welding structure design technology of the petal wall panel, which realizes structural adaptive compensation and structural self-supporting welding, significantly simplifies the welding tooling requirements, and can effectively eliminate the cost problem of traditional bolt connections. At the same time, it realizes convenient manufacturing of circumferential easy compensation, and the processing accuracy achieves machining accuracy.

[0049] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A ring-shaped quantized compensation petal grid tube structure, characterized in that include: A large wall panel (1) and a small wall panel (2); wherein, The large wall panel (1) and the small wall panel (2) are both in arc shape; One end of the large wall panel (1) is connected to one end of the small wall panel (2); The other end of the large wall panel (1) is connected to the other end of the small wall panel (2).

2. The ring-shaped quantized compensation petal grid tube structure according to claim 1 is characterized in that: The large wall panel (1) comprises a grid (11) and a thin skin area (12); wherein: The grid (11) and the thin skin area (12) are connected.

3. The ring-shaped quantized compensation petal grid tube structure according to claim 1 is characterized in that: The small wall panel (2) comprises a second grid (21), a second thin skin area (22) and a special-shaped boss (23); wherein: The second grid (21) is connected to the second skin thin area (22); The special-shaped boss (23) is connected to the second skin thin area (22); the special-shaped boss (23) is located in the middle of the second grid (21).

4. The ring-shaped quantized compensation petal grid tube structure according to claim 1 is characterized in that: The steps of making the large wall panel (1) include: The flat plate is processed into a grid plate by a mechanical milling process; Clean the grid plate; The cleaned grid plate is roll-bent by a roll-bending tool to form a high-rib grid wall plate structure; The high-rib grid wall panel structure is de-elasticized to obtain a large wall panel (1).

5. The ring-shaped quantized compensation petal grid tube structure according to claim 4 is characterized in that: The roll bending tool comprises a first driving wheel (31), a second driving wheel (32) and a driven wheel (4); wherein: A surface of the cleaned grid plate is pressed against the driven wheel (4); The other surface of the cleaned grid plate is pressed against the first driving wheel (31) and the second driving wheel (32) respectively; The first driving wheel (31) and the second driving wheel (32) are symmetrical about a vertical line perpendicular to the driven wheel (4).

6. The ring-shaped quantized compensation petal grid tube structure according to claim 5 is characterized in that: The residual angle α of the single-sided roll bending of the wall panel is greater than the effective roll bending angle β.

7. The ring-shaped quantized compensation petal grid tube structure according to claim 4 is characterized in that: The arc length of the elastic straight line side is (α-β)πR / 180, and the arc length of the elastic straight line side is between 50 times and 100 times the thickness T of the high-rib grid wall panel structure.

8. The ring-shaped quantized compensation petal grid tube structure according to claim 1 is characterized in that: One end of the large wall panel (1) is welded to one end of the small wall panel (2); and the other end of the large wall panel (1) is welded to the other end of the small wall panel (2).

9. The ring-shaped quantized compensation petal grid tube structure according to claim 8 is characterized in that: The welding steps include: One end of the large wall panel (1) and one end of the small wall panel (2) are held in position and fixed by a bottom locking structure through a flexible rope (5), and the other end of the large wall panel (1) and the other end of the small wall panel (2) are held in position and fixed by a bottom locking structure through a flexible rope (5); One end of the large wall plate (1) is welded to one end of the small wall plate (2); and the other end of the large wall plate (1) is welded to the other end of the small wall plate (2).

10. The ring-shaped quantized compensation petal grid tube structure according to claim 9 is characterized in that: The thickness t of the lock bottom structure is between 0.5 and 0.9 times the wall thickness T of the tube structure.

Images