Thin-wall flange component with built-in one-way array reinforced partition plate and preparation method of thin-wall flange component

Abstract

The invention belongs to the field of material processing and manufacturing, and relates to a thin-wall flange component with a built-in one-way array reinforced partition plate and a preparation method of the thin-wall flange component. The special-shaped electrode is adopted for completing resistance spot welding connection of the deep-cavity component, the problems that a traditional straight handle electrode interferes with the component, and spot welding manufacturing cannot be conducted are solved, a new thought is provided for avoiding of the resistance spot welding electrode of the spatial special-shaped component, and the application field of resistance spot welding is expanded; according to the special welding fixing tool, accurate positioning of the internal partition plate and flexible adjustment of clamping force are achieved, welding deformation can be effectively restrained, meanwhile, damage of rigid clamping jaws to the surface state of a part is avoided due to the use of flexible clamping blocks, and the surface quality of the part is guaranteed; the electrode size is small in top and large in bottom, the current density when welding current passes through the appearance face of a part is achieved, the thickness of a softening layer during spot welding is reduced, the spot welding indentation depth is effectively reduced, and the surface quality of a component is remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of materials processing and manufacturing, and relates to a thin-walled flange component with built-in unidirectional array reinforced partition and its preparation method. Background Technology

[0002] The widespread application of complex lightweight components plays a crucial role in the structural weight reduction of aerospace vehicles. Internally reinforced thin-walled structures, as a typical complex lightweight configuration, offer good reinforcement and weight reduction effects. Traditional machining requires mechanical subtraction methods, where a blank of similar size and shape is removed and the final configuration is manufactured on a CNC machine tool using turning, milling, and other subtraction techniques. Subtractive machining offers high manufacturing precision and automation, with simple processing steps and low dependence on upstream and downstream processes. However, when machining components with built-in reinforcing partitions, the thin-walled structure requires the cutting tool to contact the workpiece during machining. When the wall thickness is insufficient to withstand the cutting force, surface deformation occurs, reducing manufacturing precision. This necessitates a series of internal supports or external fixtures for auxiliary machining. Furthermore, complex components require careful spatial arrangement to fully utilize the machine tool's spatial freedom, improve its adaptability, and prevent singularities from exceeding the machine's effective machining range, necessitating secondary clamping to achieve full-surface machining. Sheet metal forming, as an important manufacturing technology for thin-walled components, demonstrates significant advantages in cost reduction. It fully utilizes a combination of split forming and integral assembly manufacturing processes, first manufacturing and drilling each sub-component, then assembling them into a single component using riveting technology. The riveting process requires drilling holes in the sub-components, which compromises the integrity of the component and places higher demands on drilling precision. Furthermore, the addition of rivets increases the weight of the component, hindering the widespread application of sheet metal forming technology in manufacturing fields where weight reduction is critical. Therefore, developing a suitable connection and manufacturing method for thin-walled sheet metal components is of significant engineering importance for the efficient, high-precision, and low-cost manufacturing of thin-walled flange components with built-in unidirectional array reinforced partitions. Summary of the Invention

[0003] To address the aforementioned issues of high drilling requirements, significant weight increase, and high manufacturing costs associated with riveting connections in the manufacture of thin-walled components with built-in reinforced partitions, this invention proposes a thin-walled flange component with built-in unidirectional array reinforced partitions and its preparation method. This invention replaces riveting with resistance spot welding. By designing dedicated resistance spot welding electrodes, it overcomes the spatial constraints of resistance spot welding technology on complex configurations, improving the applicability of resistance spot welding and the welding quality of the spot welds. Furthermore, it designs auxiliary partition positioning fixtures to improve the spatial positioning accuracy of the partition spot welds.

[0004] The technical solution of the present invention:

[0005] A thin-walled flange component with built-in unidirectional array reinforced partition and its manufacturing method are disclosed. Based on the shape characteristics of the thin-walled flange component and the required weld point locations, a long-arm Z-shaped spot welding electrode is designed and manufactured to overcome the interference problem between the electrode and the cylinder shape, achieving effective welding of weld points in the deep cavity of the cylinder. The diameter of the upper electrode head is designed to be smaller than that of the lower electrode head, enabling control of the current density at the interface between the upper and lower electrodes and the surface of the part to be welded, adjusting the size and morphology of the weld nugget. The larger electrode head acts on the outer surface of the part, and the lower current density effectively suppresses deep indentation defects, improving the overall quality of the weld point. A pre-welding positioning device for the built-in unidirectional array reinforced partition is designed, using bidirectional clamping of claws and limiting baffles to fix the relative position of the unidirectional array reinforced partition and the cylinder, completing the positioning of all reinforced partitions. Finally, the Z-shaped electrode is used to complete the resistance spot welding connection between the array partition of the thin-walled flange component and the cylinder wall of the flange component.

[0006] According to one aspect of this application, a thin-walled flange component with built-in unidirectional array reinforced partition is provided. The main body of the thin-walled flange component with built-in unidirectional array reinforced partition is an elliptical cylinder 2, which is a titanium alloy elliptical deep cavity cylindrical component with a thin-walled flange 1 at one end.

[0007] Both ends of the elliptical cylinder 2 are open in the depth direction, and an internal partition 3 is provided inside. The internal partition 3 has partition bends 4 along the long side of both sides of the elliptical cylinder 2. The internal partition 3 is installed in the elliptical cylinder 2 in an array along the long axis of the elliptical cylinder 2 and perpendicular to the cross-section of the elliptical cylinder 2, and is attached to the inner wall 5 of the elliptical cylinder 2 through the partition bends 4.

[0008] The height of the bend 4 of the partition plate is 2 to 10 mm.

[0009] The bent edges 4 of the partition plates at both ends of the long side of the elliptical cylinder 2 all point inward into the elliptical cylinder 2.

[0010] According to another aspect of this application, a method for manufacturing the above-mentioned thin-walled flange member with built-in unidirectional array reinforced partition is provided, comprising the following steps:

[0011] The deep cavity cylindrical blank 6 is manufactured using superplastic forming technology, and the inner partition 3 with partition bend 4 is manufactured using titanium alloy hot forming technology. Then, the deep cavity cylindrical blank 6 and the inner partition 3 with partition bend 4 are fixed to the pre-welding positioning device, so that the partition bend 4 of the inner partition 3 with partition bend 4 is attached to the inner wall of the deep cavity cylindrical blank 6 and fixed. Resistance spot welding technology is used to connect the attachment point, and the inner partition 3 with partition bend 4 and the deep cavity cylindrical blank 6 are fixed. Finally, the burrs are removed using laser cutting technology to obtain the thin-walled flange component with built-in unidirectional array reinforced partition.

[0012] One end of the deep cavity cylindrical blank 6 retains a rough edge for easy clamping and fixing.

[0013] The resistance spot welding connection is achieved using a spot welding machine with a Z-type special spot welding electrode;

[0014] The Z-type special spot welding electrode includes an upper electrode 7 and a lower electrode 8;

[0015] Both the upper electrode 7 and the lower electrode 8 are made of copper and are manufactured as a single piece using mechanical cutting technology.

[0016] The upper electrode 7 is composed of an upper clamping rod 9, an upper electrode arm 10, and an upper electrode head 11;

[0017] The lower electrode 8 is composed of a lower clamping rod 12, a lower electrode arm 13, and a lower electrode head 14;

[0018] The upper clamping rod 9, the upper electrode arm 10, the lower clamping rod 12, and the lower electrode arm 13 are all cuboids;

[0019] The upper electrode head 11 is a cylinder with a diameter of 6-8 mm;

[0020] The lower electrode head 14 is a cylinder with a diameter of 10-13 mm;

[0021] The upper clamping rod 9 and the upper electrode head 11 are located at both ends of the upper electrode arm 10 along the length direction and are distributed on the upper and lower sides along the thickness direction.

[0022] The lower clamping rod 12 and the lower electrode head 14 are located at both ends of the lower electrode arm 13 along the length direction and are distributed on the upper and lower sides along the thickness direction.

[0023] The upper clamping rod 9 and the lower clamping rod 12 are matched with the electrode fixing hole size of the spot welding machine.

[0024] During resistance spot welding, the upper electrode head 11 acts on the inner side of the inner wall of the deep cavity cylindrical blank 6 above the inner side of ...

[0025] The pre-welding positioning device includes a base 15 and a clamping mechanism 16.

[0026] The base 15 has a rigid structure, the main body of which is a strip-shaped thick plate structure 17. The strip-shaped thick plate structure 17 is provided with an inverted trapezoidal rigid reinforcing rib 18 below it. The strip-shaped thick plate structure 17 is provided with a rectangular clamping mechanism mounting block 19 above it. The clamping mechanism mounting block 19 is provided with a gripper arm positioning hole 30 at its top. The clamping mechanism motion spring fixing screw 20 is set on the strip-shaped thick plate structure 17 and arranged along one side of the clamping mechanism mounting block 19. The strip-shaped thick plate structure 17 is provided with a component flange positioning hook 21 at each end along its length.

[0027] The clamping mechanism motion spring fixing screw 20 is connected to the base 15 through the motion spring fixing screw positioning hole 28 on the strip thick plate structure 17; the motion spring fixing screw positioning hole 28 is located on the strip thick plate structure 17 and is arranged linearly along one side of the clamping mechanism mounting block 19, and the number is equal to the number of built-in partitions 3 of the built-in unidirectional array reinforced partition thin-walled flange component.

[0028] The component flange positioning hook 21 is connected to the base 15 through the component flange positioning hook positioning hole 29 on the strip thick plate structure 17.

[0029] The clamping mechanism has a spring hanging hole at one end of the motion spring fixing screw 20 and is equipped with a motion spring fixing screw nut 33. After the clamping mechanism motion spring fixing screw 20 passes through the motion spring fixing screw positioning hole 28, the motion spring fixing screw nut 33 is used to limit the upward or downward displacement of the clamping mechanism motion spring fixing screw 20 and adjust the clamping force of the clamping mechanism 16.

[0030] The component flange positioning hook 21 is integrally formed and has an inverted L-shaped structure. It is divided into two parts: a straight shank screw and a clamping hook. The clamping hook is located at the end of the straight shank screw, and the other end of the straight shank screw is equipped with a positioning hook screw nut 34. After the straight shank screw part of the component flange positioning hook 21 is passed through the positioning hole 29 of the component flange positioning hook in an inverted L-shape, the upward or downward displacement of the component flange positioning hook 21 is restricted by the positioning hook screw nut 34, and the clamping force of the component flange positioning hook 21 is adjusted.

[0031] The clamping mechanism 16 includes a gripper arm 22, a flexible clamping block 23, a limiting baffle 24, a gripper arm fixing bolt 25, a flexible clamping block fixing bolt 26, and a motion spring 27.

[0032] The gripper arm 22 is a rigid thin-walled structure, divided into a long arm section and a short arm section. One end of the long arm section has a through hole for connecting with the gripper arm fixing bolt 25. One end of the short arm section also has a through hole for connecting with the motion spring 27 via a hook. A through hole is provided at the corner where the long arm section and the short arm section connect for connecting the gripper arm 22 with the gripper arm fixing bolt 25.

[0033] The flexible clamping block 23 is divided into a working surface and a supporting surface. Two left-right symmetrical triangular reinforcing ribs are made on the supporting surface. The distance between the two left-right symmetrical triangular reinforcing ribs is more than 2mm greater than the thickness of the gripper arm 22. A through hole is made at the apex of the triangular reinforcing rib for connecting the flexible clamping block 23 and the flexible clamping block fixing bolt 26 of the gripper arm 22. Flexible felt is attached to the working surface to prevent the working surface from directly contacting the part, scratching the surface of the part, and damaging the surface condition of the part.

[0034] The limiting baffle 24 is a rectangular shape with a rectangular notch 31 on one short side. The width of the rectangular notch 31 is 0.1 to 0.2 mm larger than the thickness of the clamping mechanism mounting block 19. The limiting baffle 24 and the clamping mechanism mounting block 19 are installed and fixed through the gap fit of the rectangular notch 31. A baffle limiting block 32 with a thickness of 0.5 to 1 mm is made on the other short side of the limiting baffle 24 for longitudinal positioning when the built-in partition 3 is installed.

[0035] The operation method of the pre-welding positioning device is as follows:

[0036] (1) Position the built-in partition 3 with the baffle limit block 32 on the limit baffle 24, clamp it between the flexible clamping block 23 and the limit baffle 24, adjust the motion spring fixing screw nut 33, control the clamping force of the flexible clamping block 23 and the limit baffle 24 on the built-in partition 3, and realize the positioning of the built-in partition 3.

[0037] (2) With the deep cavity cylindrical blank 6 facing downwards, the surface of the flange 1 is attached to the upper surface of the strip thick plate structure 17. The component flange positioning hook 21 is installed, the position of the positioning hook screw nut 34 is adjusted, and the clamping force of the component flange positioning hook 21 on the flange 1 is controlled to achieve the positioning of the deep cavity cylindrical blank 6.

[0038] The beneficial effects of this invention are:

[0039] (1) The present invention proposes to use irregularly shaped electrodes to complete the resistance spot welding connection of deep cavity components, which solves the problem that traditional straight-handle electrodes interfere with the components and cannot be spot welded. It provides a new idea for avoiding resistance spot welding electrodes of spatial irregularly shaped components and expands the application field of resistance spot welding.

[0040] (2) The special welding fixture proposed in this invention realizes the precise positioning of the internal partition and the flexible adjustment of the clamping force, which can effectively suppress welding deformation. At the same time, the use of flexible clamping blocks avoids the damage to the surface state of the parts by rigid clamps and ensures the surface quality of the parts.

[0041] (3) The electrode size of small top and large bottom realizes the current density when the welding current passes through the outer surface of the part, reduces the thickness of the softened layer during spot welding, effectively reduces the depth of spot welding indentation, and significantly improves the surface quality of the component. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of a thin-walled flange component with a built-in unidirectional array reinforced partition.

[0043] Figure 2 This is a schematic diagram of a deep-cavity cylindrical blank.

[0044] Figure 3 This is a schematic diagram of the built-in partition.

[0045] Figure 4 This is a schematic diagram of a Z-type special spot welding electrode.

[0046] Figure 5 This is a schematic diagram of the pre-welding positioning device.

[0047] Figure 6 This is a schematic diagram of the base structure.

[0048] Figure 7 This is a schematic diagram of a limit stop.

[0049] Figure 8 This is a schematic diagram of the cylinder blank clamping process.

[0050] In the diagram: 1 is the flange; 2 is the elliptical cylinder; 3 is the internal partition; 4 is the partition bend; 5 is the inner wall of the cylinder; 6 is the cylinder blank; 7 is the upper electrode; 8 is the lower electrode; 9 is the upper clamping rod; 10 is the upper electrode arm; 11 is the upper electrode head; 12 is the lower clamping rod; 13 is the lower electrode arm; 14 is the lower electrode head; 15 is the base; 16 is the clamping mechanism; 17 is the strip-shaped thick plate structure; 18 is the inverted trapezoidal rigid reinforcing rib; 19 is the clamping mechanism mounting block; 20 is the clamping mechanism. 21 is a motion spring fixing screw; 22 is a component flange positioning hook; 23 is a gripper arm; 24 is a flexible clamping block; 25 is a limiting baffle; 26 is a gripper arm fixing bolt; 27 is a motion spring; 28 is a motion spring fixing screw positioning hole; 29 is a component flange positioning hook positioning hole; 30 is a gripper arm positioning hole; 31 is a rectangular notch; 32 is a baffle limiting block; 33 is a motion spring fixing screw nut; 34 is a positioning hook screw nut. Detailed Implementation

[0051] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0052] Example 1

[0053] A thin-walled flange component with built-in unidirectional array reinforced partition, wherein the main body of the thin-walled flange component with built-in unidirectional array reinforced partition is an elliptical cylinder 2, which is a titanium alloy elliptical deep cavity cylindrical component, with a thin-walled flange 1 at one end;

[0054] Both ends of the elliptical cylinder 2 are open in the depth direction, and an internal partition 3 is provided inside. The internal partition 3 has partition bends 4 along the long side of both sides of the elliptical cylinder 2. The internal partition 3 is installed in the elliptical cylinder 2 in an array along the long axis of the elliptical cylinder 2 and perpendicular to the cross-section of the elliptical cylinder 2, and is attached to the inner wall 5 of the elliptical cylinder 2 through the partition bends 4.

[0055] The height of the bend 4 of the partition plate is 2 to 10 mm.

[0056] The bent edges 4 of the partition plates at both ends of the long side of the elliptical cylinder 2 all point inward into the elliptical cylinder 2.

[0057] A method for manufacturing the above-mentioned thin-walled flange component with built-in unidirectional array reinforced partition includes the following steps:

[0058] The deep cavity cylindrical blank 6 is manufactured using superplastic forming technology, and the inner partition 3 with partition bend 4 is manufactured using titanium alloy hot forming technology. Then, the deep cavity cylindrical blank 6 and the inner partition 3 with partition bend 4 are fixed to the pre-welding positioning device, so that the partition bend 4 of the inner partition 3 with partition bend 4 is attached to the inner wall of the deep cavity cylindrical blank 6 and fixed. Resistance spot welding technology is used to connect the attachment point, and the inner partition 3 with partition bend 4 and the deep cavity cylindrical blank 6 are fixed. Finally, the burrs are removed using laser cutting technology to obtain the thin-walled flange component with built-in unidirectional array reinforced partition.

[0059] One end of the deep cavity cylindrical blank 6 retains a rough edge for easy clamping and fixing.

[0060] The resistance spot welding connection is achieved using a spot welding machine with a Z-type special spot welding electrode;

[0061] The Z-type special spot welding electrode includes an upper electrode 7 and a lower electrode 8;

[0062] Both the upper electrode 7 and the lower electrode 8 are made of copper and are manufactured as a single piece using mechanical cutting technology.

[0063] The upper electrode 7 is composed of an upper clamping rod 9, an upper electrode arm 10, and an upper electrode head 11;

[0064] The lower electrode 8 is composed of a lower clamping rod 12, a lower electrode arm 13, and a lower electrode head 14;

[0065] The upper clamping rod 9, the upper electrode arm 10, the lower clamping rod 12, and the lower electrode arm 13 are all cuboids;

[0066] The upper electrode head 11 is a cylinder with a diameter of 6-8 mm;

[0067] The lower electrode head 14 is a cylinder with a diameter of 10-13 mm;

[0068] The upper clamping rod 9 and the upper electrode head 11 are located at both ends of the upper electrode arm 10 along the length direction and are distributed on the upper and lower sides along the thickness direction.

[0069] The lower clamping rod 12 and the lower electrode head 14 are located at both ends of the lower electrode arm 13 along the length direction and are distributed on the upper and lower sides along the thickness direction.

[0070] The upper clamping rod 9 and the lower clamping rod 12 are matched with the electrode fixing hole size of the spot welding machine.

[0071] During resistance spot welding, the upper electrode head 11 acts on the inner side of the inner wall of the deep cavity cylindrical blank 6 above the inner side of ...

[0072] The pre-welding positioning device includes a base 15 and a clamping mechanism 16.

[0073] The base 15 has a rigid structure, the main body of which is a strip-shaped thick plate structure 17. The strip-shaped thick plate structure 17 is provided with an inverted trapezoidal rigid reinforcing rib 18 below it. The strip-shaped thick plate structure 17 is provided with a rectangular clamping mechanism mounting block 19 above it. The clamping mechanism mounting block 19 is provided with a gripper arm positioning hole 30 at its top. The clamping mechanism motion spring fixing screw 20 is set on the strip-shaped thick plate structure 17 and arranged along one side of the clamping mechanism mounting block 19. The strip-shaped thick plate structure 17 is provided with a component flange positioning hook 21 at each end along its length.

[0074] The clamping mechanism motion spring fixing screw 20 is connected to the base 15 through the motion spring fixing screw positioning hole 28 on the strip thick plate structure 17; the motion spring fixing screw positioning hole 28 is located on the strip thick plate structure 17 and is arranged linearly along one side of the clamping mechanism mounting block 19, and the number is equal to the number of built-in partitions 3 of the built-in unidirectional array reinforced partition thin-walled flange component.

[0075] The component flange positioning hook 21 is connected to the base 15 through the component flange positioning hook positioning hole 29 on the strip thick plate structure 17.

[0076] The clamping mechanism has a spring hanging hole at one end of the motion spring fixing screw 20 and is equipped with a motion spring fixing screw nut 33. After the clamping mechanism motion spring fixing screw 20 passes through the motion spring fixing screw positioning hole 28, the motion spring fixing screw nut 33 is used to limit the upward or downward displacement of the clamping mechanism motion spring fixing screw 20 and adjust the clamping force of the clamping mechanism 16.

[0077] The component flange positioning hook 21 is integrally formed and has an inverted L-shaped structure. It is divided into two parts: a straight shank screw and a clamping hook. The clamping hook is located at the end of the straight shank screw, and the other end of the straight shank screw is equipped with a positioning hook screw nut 34. After the straight shank screw part of the component flange positioning hook 21 is passed through the positioning hole 29 of the component flange positioning hook in an inverted L-shape, the upward or downward displacement of the component flange positioning hook 21 is restricted by the positioning hook screw nut 34, and the clamping force of the component flange positioning hook 21 is adjusted.

[0078] The clamping mechanism 16 includes a gripper arm 22, a flexible clamping block 23, a limiting baffle 24, a gripper arm fixing bolt 25, a flexible clamping block fixing bolt 26, and a motion spring 27.

[0079] The gripper arm 22 is a rigid thin-walled structure, divided into a long arm section and a short arm section. One end of the long arm section has a through hole for connecting with the gripper arm fixing bolt 25. One end of the short arm section also has a through hole for connecting with the motion spring 27 via a hook. A through hole is provided at the corner where the long arm section and the short arm section connect for connecting the gripper arm 22 with the gripper arm fixing bolt 25.

[0080] The flexible clamping block 23 is divided into a working surface and a supporting surface. Two left-right symmetrical triangular reinforcing ribs are made on the supporting surface. The distance between the two left-right symmetrical triangular reinforcing ribs is more than 2mm greater than the thickness of the gripper arm 22. A through hole is made at the apex of the triangular reinforcing rib for connecting the flexible clamping block 23 and the flexible clamping block fixing bolt 26 of the gripper arm 22. Flexible felt is attached to the working surface to prevent the working surface from directly contacting the part, scratching the surface of the part, and damaging the surface condition of the part.

[0081] The limiting baffle 24 is a rectangular shape with a rectangular notch 31 on one short side. The width of the rectangular notch 31 is 0.1 to 0.2 mm larger than the thickness of the clamping mechanism mounting block 19. The limiting baffle 24 and the clamping mechanism mounting block 19 are installed and fixed through the gap fit of the rectangular notch 31. A baffle limiting block 32 with a thickness of 0.5 to 1 mm is made on the other short side of the limiting baffle 24 for longitudinal positioning when the built-in partition 3 is installed.

[0082] The operation method of the pre-welding positioning device is as follows:

[0083] (1) Position the built-in partition 3 with the baffle limit block 32 on the limit baffle 24, clamp it between the flexible clamping block 23 and the limit baffle 24, adjust the motion spring fixing screw nut 33, control the clamping force of the flexible clamping block 23 and the limit baffle 24 on the built-in partition 3, and realize the positioning of the built-in partition 3.

[0084] (2) With the deep cavity cylindrical blank 6 facing downwards, the surface of the flange 1 is attached to the upper surface of the strip thick plate structure 17. The component flange positioning hook 21 is installed, the position of the positioning hook screw nut 34 is adjusted, and the clamping force of the component flange positioning hook 21 on the flange 1 is controlled to achieve the positioning of the deep cavity cylindrical blank 6.

[0085] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions made by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A thin-walled flange component with built-in unidirectional array reinforced partition, characterized in that, The main body of the built-in unidirectional array reinforced partition thin-walled flange component is an elliptical cylinder (2), which is a titanium alloy elliptical deep cavity cylindrical component with a thin-walled flange (1) at one end. The elliptical cylinder (2) is open at both ends in the depth direction and has an internal partition (3). The internal partition (3) has a partition bend (4) along the long side of both sides of the elliptical cylinder (2). The internal partition (3) is arranged in an array along the depth direction of the elliptical cylinder (2) and perpendicular to the long axis of the cross section of the elliptical cylinder (2). It is attached to the inner wall (5) of the elliptical cylinder (2) through the partition bend (4). The height of the bent edge (4) of the partition plate is 2 to 10 mm; The bent edges (4) of the partition plates at both ends of the long side of the elliptical cylinder (2) all point towards the inside of the elliptical cylinder (2).

2. A method for preparing a thin-walled flange component with built-in unidirectional array reinforced partition as described in claim 1, characterized in that, Includes the following steps: A deep cavity cylindrical blank (6) is manufactured using superplastic forming technology. An internal partition (3) with a partition bend (4) is manufactured using titanium alloy hot forming technology. Then, the deep cavity cylindrical blank (6) and the internal partition (3) with a partition bend (4) are fixed to the pre-welding positioning device so that the partition bend (4) of the internal partition (3) with a partition bend (4) is attached to the inner wall of the deep cavity cylindrical blank (6) and fixed. Resistance spot welding technology is used to connect the attachment point to complete the fixation of the internal partition (3) with the partition bend (4) and the deep cavity cylindrical blank (6). Finally, the burrs are removed using laser cutting technology to obtain the internal unidirectional array reinforced partition thin-walled flange component. One end of the deep cavity cylindrical blank (6) retains a rough edge for easy clamping and fixing.

3. The preparation method according to claim 2, characterized in that, The resistance spot welding connection is achieved using a spot welding machine with a Z-type special spot welding electrode; The Z-type special spot welding electrode includes an upper electrode (7) and a lower electrode (8); Both the upper electrode (7) and the lower electrode (8) are made of copper and are manufactured as a single piece using mechanical cutting technology; The upper electrode (7) is composed of an upper clamping rod (9), an upper electrode arm (10), and an upper electrode head (11); The lower electrode (8) is composed of a lower clamping rod (12), a lower electrode arm (13), and a lower electrode head (14); The upper clamping rod (9), upper electrode arm (10), lower clamping rod (12), and lower electrode arm (13) are all cuboids; The upper electrode head (11) is a cylinder with a diameter of 6-8 mm; The lower electrode head (14) is a cylinder with a diameter of 10-13 mm; The upper clamping rod (9) and the upper electrode head (11) are located at both ends of the upper electrode arm (10) along the length direction and distributed on the upper and lower sides along the thickness direction. The lower clamping rod (12) and the lower electrode head (14) are located at both ends of the lower electrode arm (13) along the length direction and distributed on the upper and lower sides along the thickness direction. The upper clamping rod (9) and the lower clamping rod (12) are matched with the electrode fixing hole size of the spot welding machine.

4. The preparation method according to claim 3, characterized in that, During resistance spot welding, the upper electrode head (11) acts on the inner side of the inner wall of the deep cavity blank (6) above the inner side of ...

5. The preparation method according to claim 4, characterized in that, The pre-welding positioning device includes a base (15) and a clamping mechanism (16).

6. The preparation method according to claim 5, characterized in that, The base (15) has a rigid structure, the main body of which is a strip-shaped thick plate structure (17). The strip-shaped thick plate structure (17) is provided with an inverted trapezoidal rigid reinforcing rib (18) below. The strip-shaped thick plate structure (17) is provided with a rectangular clamping mechanism mounting block (19) above. The clamping mechanism mounting block (19) is provided with a claw arm positioning hole (30) at the top. The clamping mechanism motion spring fixing screw (20) is set on the strip-shaped thick plate structure (17) and arranged along one side of the clamping mechanism mounting block (19). The strip-shaped thick plate structure (17) is provided with a component flange positioning hook (21) at each end along the length direction.

7. The preparation method according to claim 6, characterized in that, The clamping mechanism motion spring fixing screw (20) is connected to the base (15) through the motion spring fixing screw positioning hole (28) on the strip thick plate structure (17); the motion spring fixing screw positioning hole (28) is located on the strip thick plate structure (17) and is arranged linearly along one side of the clamping mechanism mounting block (19), and the number is equal to the number of built-in partitions (3) of the built-in unidirectional array reinforced partition thin-walled flange component; The component flange positioning hook (21) is connected to the base (15) through the component flange positioning hook positioning hole (29) on the strip thick plate structure (17); The clamping mechanism motion spring fixing screw (20) has a spring hanging hole at one end and is equipped with a motion spring fixing screw nut (33). After the clamping mechanism motion spring fixing screw (20) is passed through the motion spring fixing screw positioning hole (28), the motion spring fixing screw nut (33) is used to limit the upward or downward displacement of the clamping mechanism motion spring fixing screw (20) and adjust the clamping force of the clamping mechanism (16). The component flange positioning hook (21) is integrally formed and has an inverted L-shaped structure. It is divided into two parts: a straight shank screw and a clamping hook. The clamping hook is located at the end of the straight shank screw, and the other end of the straight shank screw is equipped with a positioning hook screw nut (34). After the straight shank screw part of the component flange positioning hook (21) is passed through the positioning hole (29) of the component flange positioning hook (21) in an inverted L-shape, the upward or downward displacement of the component flange positioning hook (21) is restricted by the positioning hook screw nut (34), and the clamping force of the component flange positioning hook (21) is adjusted.

8. The preparation method according to claim 7, characterized in that, The clamping mechanism (16) includes a gripper arm (22), a flexible clamping block (23), a limiting baffle (24), a gripper arm fixing bolt (25), a flexible clamping block fixing bolt (26), and a motion spring (27).

9. The preparation method according to claim 8, characterized in that, The gripper arm (22) is a rigid thin-walled structure, divided into a long arm section and a short arm section. One end of the long arm section has a through hole for connecting with the gripper arm fixing bolt (25). One end of the short arm section also has a through hole for connecting with the motion spring (27) via a hook. A through hole is provided at the corner where the long arm section and the short arm section connect for connecting the gripper arm (22) with the gripper arm fixing bolt (25). The flexible clamp (23) is divided into a working surface and a supporting surface. Two left-right symmetrical triangular reinforcing ribs are made on the supporting surface. The distance between the two left-right symmetrical triangular reinforcing ribs is more than 2mm greater than the thickness of the gripper arm (22). A through hole is made at the apex of the triangular reinforcing rib for connecting the flexible clamp (23) and the flexible clamp fixing bolt (26) of the gripper arm (22). Flexible felt is attached to the working surface to prevent the working surface from directly contacting the part, scratching the surface of the part, and damaging the surface condition of the part. The limiting baffle (24) is a rectangular structure with a rectangular notch (31) on one short side. The width of the rectangular notch (31) is 0.1 to 0.2 mm larger than the thickness of the clamping mechanism mounting block (19). The limiting baffle (24) and the clamping mechanism mounting block (19) are installed and fixed through the gap of the rectangular notch (31). A baffle limiting block (32) with a thickness of 0.5 to 1 mm is made on the other short side of the limiting baffle (24) for longitudinal positioning when the built-in partition (3) is installed.

10. The preparation method according to claim 9, characterized in that, The operation method of the pre-welding positioning device is as follows: (1) Position the built-in partition (3) with the baffle limit block (32) on the limit baffle (24), clamp it between the flexible clamping block (23) and the limit baffle (24), adjust the motion spring fixing screw nut (33) to control the clamping force of the flexible clamping block (23) and the limit baffle (24) on the built-in partition (3) to achieve the positioning of the built-in partition (3); (2) With the flange (1) facing downwards, place the deep cavity cylindrical blank (6) with the surface of the flange (1) against the upper surface of the strip thick plate structure (17), install the component flange positioning hook (21), adjust the position of the positioning hook screw nut (34), control the clamping force of the component flange positioning hook (21) on the flange (1), and realize the positioning of the deep cavity cylindrical blank (6).

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