Structural design and process design of a frame-type thin-walled compact welded structural component

Abstract

The present invention relates to the field of titanium alloy processing technology, specifically to a structural design and process design of a frame-type thin-walled compact welded structural member, wherein the structural member is welded in sequence to form a thin-walled structure by a thin-walled tube, a corner, a bottom plate, a sealing plate and a reinforcement; the bottom plate is provided with a first through hole; the center ring is welded to the bottom plate; the length direction of the second reinforcement is perpendicular to the annular first reinforcement, and one end of the second reinforcement is welded to the outer wall of the center ring; the center tube extends into the frame-type thin-walled structure and is welded to the center ring, and the radial distance from the outer wall of the center tube to the inner wall of the thin-walled tube does not exceed 400 mm. The present invention maintains the structural dimensions and structural characteristics of the steel equipment by performing local optimization design based on the structural design of the steel equipment, provides sufficient operating space for welding operations, and solves the problem that welding cannot be achieved in local positions of the frame thin-walled compact welded structural member, thereby realizing the replacement and quality upgrade of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of titanium alloy processing, in particular to the structural design and process design of a frame-type thin-walled compact welded structural part. Background Art

[0002] A certain device is exposed to seawater and marine environments for a long time, and is required to have long-term quality stability.

[0003] This equipment is conventionally manufactured from steel. Due to its poor corrosion resistance to seawater and marine environments, steel equipment requires periodic inspection and replacement, and its effectiveness cannot be guaranteed during use. Therefore, it is crucial to replace it with a titanium alloy, which is virtually corrosion-resistant in seawater and marine environments.

[0004] To ensure equipment quality stability, interchangeability, and adaptability, titanium alloy replacement often involves replacing only the original material while retaining the original structural design. Due to the different welding methods used for steel and titanium equipment, welding operations require significantly different operating space. For steel, welding with rods allows for very confined spaces. However, titanium alloy manufacturing requires ample operating space. Utilizing the structural design of steel equipment may result in inaccessible welds in certain locations, making equipment fabrication impossible.

[0005] Publication No. CN1335436A discloses a welded structure of a boss and a bracket, and a welding method thereof. A first hole 14 and a second hole 15 of a predetermined shape are provided in a cylindrical body 11 formed from a thin plate. A boss base plate 23 is provided on the boss 20 to cover the first hole, and a bracket base plate 32 is provided on the bracket 30 to cover the second hole. The boss and bracket are inserted into the cylindrical body, and the first hole and the second hole are covered from the inside with the boss base plate and the bracket base plate, respectively. These are then welded to the cylindrical body from the outside. This invention secures the bracket and boss to the inner wall of the cylindrical body by opening holes in the cylindrical body, but does not allow for welding operations within the cylindrical body.

[0006] Therefore, it is urgent to design a new type of structural design and process design of frame-type thin-walled compact welded structural parts to solve the problem that welding cannot be achieved in local positions of frame thin-walled compact welded structural parts. Summary of the Invention

[0007] In view of this, the present invention aims to propose a structural design and process design for a frame-type thin-walled compact welded structural component to solve the problem that welding cannot be achieved in some local positions of the frame-type thin-walled compact welded structural component.

[0008] Using titanium alloy to replace steel equipment materials has significant differences in welding processes due to the material's inherent characteristics, and titanium alloy materials require a larger operating space. For welding in localized narrow spaces of equipment, because steel is welded with welding rods, the welding rods can be inserted into the narrow space for welding, so this process can be carried out smoothly.

[0009] like Figure 1 As shown, the existing steel equipment includes the thin-walled tube 1, the corner 2, the base plate 3, the first reinforcement 4, the second reinforcement 5, the top plate 6, and the center tube 7. The welding process for the steel equipment is as follows: welding the thin-walled tube 1 to the corner 2 → welding the base plate 3 → welding the first reinforcement 4 → welding the second reinforcement 5 → welding the center tube 7 → welding the top plate 6. Because steel is welded with rods, which can be inserted into narrow spaces for welding, this process is smooth. However, titanium alloys cannot be welded in narrow spaces. When manual TIG is used, the local operating space of the equipment is less than 400 mm in diameter, making it impossible to weld titanium alloys in such a narrow space. This product uses manual TIG. If the above process is used, welding the center tube 7 to the base plate 3 and the second reinforcement 5 cannot be completed, which is not conducive to ensuring the local structural strength and stability of the equipment.

[0010] like Figure 3 As shown, the present invention is based on the external dimensions and structure of the existing steel equipment. By optimizing the structural design and process design, only local optimization and adjustment are made to the structural design. The original bottom plate 3 is decomposed into the bottom plate 3 and the sealing plate 8, the original center tube 7 is decomposed into the center tube 7 and the center ring 9, and the bottom plate 3 is decomposed into the bottom plate 3 and the sealing plate 8. The purpose is to realize the welding of the butt weld between the center ring 9 and the center tube 7, and the center tube 7 is decomposed into the center tube 7 and the center ring 9. The purpose is to complete the assembly welding of the component in two stages. The center ring 9 is installed first, and the center tube 7 is not installed, providing an operating space of about 900 mm in diameter for internal welding of the equipment, providing sufficient operating space for welding operations, and realizing manual TIG welding, thereby solving the problem that local positions of thin-walled and compact welded structural parts of titanium alloy frames cannot be welded.

[0011] Titanium equipment welding process: Weld the thin-walled tube 1 to the corner 2 → weld the bottom plate 3 → weld the first reinforcement 4 → weld the second reinforcement 5 → weld the center ring 9 → weld the center tube 7 → weld the sealing plate 8 → weld the top plate 6. The weld between the center tube 7 and the center ring 9 utilizes single-sided welding and double-sided forming technology.

[0012] This equipment is a thin-walled frame-type complex welded structural part with high dimensional accuracy requirements and compact structure. It is made of titanium alloy, which is a domestic first and a technological innovation activity. The product structure involved in the present invention is a domestic first, and there is no similar invention to the present invention.

[0013] The technical solution of the present invention is achieved as follows:

[0014] The present invention discloses a structural design of a frame-type thin-walled compact welded structural member, comprising a thin-walled tube, a corner, a bottom plate, a first reinforcement material, a second reinforcement material, a top plate, a central tube, a sealing plate, and a central ring. The thin-walled tube, the corner, and the bottom plate are welded and connected in sequence to form a thin-walled structure.

[0015] The bottom plate is provided with a first through hole for facilitating welding connection between the central tube and the central ring;

[0016] The center ring is welded to the bottom plate, and the center ring can completely cover the first through hole;

[0017] The first reinforcement material is circumferentially welded to the inner wall of the thin-walled cylinder;

[0018] The second reinforcement is welded to the inner wall of the thin-walled tube, the length direction of the second reinforcement is perpendicular to the plane where the first reinforcement is located, and one end of the second reinforcement is welded to the outer wall of the center ring to form a frame-type welded structure;

[0019] The central tube extends into the frame-type thin-walled structure and is welded to the central ring, and the radial distance between the outer wall of the central tube and the inner wall of the thin-walled cylinder does not exceed 400 mm;

[0020] The sealing plate is used to seal the first through hole.

[0021] Furthermore, the wall thickness of the center ring is greater than that of the center tube, the inner diameter or outer diameter of the center tube is the same as that of the center ring, and the height of the center ring is greater than that of the second reinforcement material.

[0022] Furthermore, the center ring is vertically welded to the bottom plate, and the center ring is coaxial with the first through hole.

[0023] Furthermore, the diameter of the first through hole is larger than the diameter of the sealing plate and smaller than the outer diameter of the center ring, and the diameter of the sealing plate is larger than the inner diameter of the center ring.

[0024] Furthermore, the top plate is provided at one end of the thin-walled tube away from the bottom plate, and the cross section of the top plate is annular.

[0025] Furthermore, the diameter of the end of the thin-walled tube away from the bottom plate is not less than 600 mm, and the diameter of the thin-walled tube adjacent to the bottom plate is not less than 400 mm.

[0026] Furthermore, when the inner diameter of the center ring is not greater than 400 mm, the height of the center ring is not greater than 200 mm.

[0027] Furthermore, the thin-walled tube, the corner, the bottom plate, the first reinforcing material, the second reinforcing material, the top plate, the center tube, the sealing plate and the center ring are all made of titanium alloy.

[0028] Another object of the present invention is to disclose a process design for manufacturing a frame-type thin-walled compact welded structural member, which is used for manufacturing any of the above-mentioned frame-type thin-walled compact welded structural members, and includes the following specific steps:

[0029] S1: welding the thin-walled tube, the corner, and the bottom plate in sequence;

[0030] S2: Welding the first reinforcement material to the inner wall of the thin-walled tube along the circumferential direction;

[0031] S3: placing the second reinforcement member perpendicular to the first reinforcement member, and welding the second reinforcement member to the inner wall of the thin-walled tube;

[0032] S4: welding the center ring to the bottom plate, and welding the second reinforcement to the outer wall of the center ring;

[0033] S5: welding the center tube and the center ring through the first through hole;

[0034] S6: Welding the sealing plate to the bottom plate to seal the first through hole;

[0035] S7: The top plate 9 is passed through the central tube and welded to the end of the thin-walled tube away from the bottom plate.

[0036] Furthermore, in step S5, the central tube and the central ring are welded using a single-sided welding and double-sided forming technology.

[0037] Compared with the prior art, the structural design and process design of a frame-type thin-walled compact welded structural member of the present invention have the following advantages:

[0038] 1. The present invention maintains the structural dimensions and characteristics of the steel equipment by performing local optimization based on the structural design, provides sufficient operating space for welding operations, solves the problem that welding cannot be achieved in local locations of thin-walled and compact welded structural parts of the frame, and realizes the upgrading and quality upgrade of the equipment.

[0039] 2. The present invention has a mature design and is simple to handle. It can effectively ensure the structural integrity, dimensional consistency and quality stability of the equipment, and has good adaptability whether it is replacement or new production. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0041] Figure 1 Design drawings for existing steel equipment structures;

[0042] Figure 2 This is the structural design diagram of the titanium equipment of the present invention;

[0043] Figure 3 This is a cross-sectional view of the titanium equipment structure of the present invention.

[0044] 1. Thin-walled tube; 2. Corner; 3. Bottom plate; 301. First through hole; 4. First reinforcement material; 5. Second reinforcement material; 6. Top plate; 7. Center tube; 8. Closing plate; 9. Center ring. DETAILED DESCRIPTION

[0045] In order to make the technical means, objectives and effects of the present invention easier to understand, embodiments of the present invention are described in detail below with reference to specific figures.

[0046] It should be noted that all terms used in the present invention to indicate direction and position, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "low", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection status between various components in a specific state. They are only for the convenience of describing the present invention, and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0047] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0048] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0049] The first purpose of the present invention is to disclose a structural design of a frame-type thin-walled compact welded structural component, which is used for welding titanium alloy parts in narrow spaces. The structural component includes a thin-walled tube 1, a corner 2, a bottom plate 3, a top plate 6, a center tube 7, a sealing plate 8, and a center ring 9. The thin-walled tube 1, the corner 2, and the bottom plate 3 are welded together in sequence to form a thin-walled structure.

[0050] The bottom plate 3 is provided with a first through hole 301 for facilitating welding connection between the center tube 7 and the center ring 9;

[0051] The center ring 9 is welded to the bottom plate 3 and can completely cover the first through hole 301;

[0052] The first reinforcement material 4 is welded to the inner wall of the thin-walled tube 1 along the circumferential direction;

[0053] The second reinforcement 5 is welded to the inner wall of the thin-walled tube 1. The length direction of the second reinforcement 5 is perpendicular to the plane where the first reinforcement 4 is located. One end of the second reinforcement 5 is welded to the outer wall of the center ring 9 to form a frame-type welded structure.

[0054] The central tube 7 extends into the frame-type thin-walled structure and is welded to the central ring 9. The radial distance between the outer wall of the central tube 7 and the inner wall of the thin-walled cylinder 1 does not exceed 400 mm.

[0055] The sealing plate 8 is used to seal the first through hole 301 .

[0056] By connecting the bottom plate 3, the corner 2 and the thin-walled tube 1 in sequence, a thin-walled structure is formed. The first reinforcement material 4 is welded to the inner wall of the thin-walled tube 1 along the circumferential direction. The length direction of the second reinforcement material 5 is perpendicular to the plane where the first reinforcement material 4 is located. One end of the second reinforcement material 5 is welded to the outer wall of the center ring 9 to form a frame-type welded structure. When the radial distance from the inner wall of the thin-walled tube 1 to the outer wall of the center tube 7 does not exceed 400 mm, since all parts of the frame-type thin-walled structure are made of titanium alloy or other materials, there is a problem of insufficient operating space required for the welding process. The second reinforcement material 5 cannot be directly welded to the center tube 7 and the center tube 7 to the base plate 3. It is necessary to design the center tube 7 and the center ring 9 separately, and the second reinforcement material 5 is vertically arranged with the first reinforcement material 4 to connect the outer wall of the center ring 9 to form a stable reinforcement structure, which significantly improves the stiffness and strength of the structural member. This design provides a larger operating space for this operation, which is convenient for the implementation of manual TIG welding and other welding methods. The setting of the first through hole 301 helps to weld the center tube 7 and the center ring 9, expands the welding operation space of the center tube 7 and the center ring 9, and realizes the structural optimization design when the space of the welding structural member is narrow.

[0057] This setting is locally optimized based on the structural design of steel equipment. It has a mature design and simple processing, and maintains the structural size and structural characteristics of the steel equipment. It has good adaptability whether it is replacement or new production. The welded structural parts provide sufficient operating space for welding operations and solve the problem that welding cannot be achieved in local positions of thin-walled and compact welded structural parts of the frame.

[0058] Specifically, the thin-walled tube 1 , the corner 2 , the bottom plate 3 , the first reinforcing material 4 , the second reinforcing material 5 , the top plate 6 , the central tube 7 , the sealing plate 8 and the central ring 9 are all made of titanium alloy.

[0059] This setting ensures the lightweight, corrosion-resistant, high-temperature performance and good welding performance of the structure by adopting titanium alloy materials. It is particularly suitable for application scenarios with strict requirements on weight, corrosion resistance and high-temperature performance, and has broad application prospects and significant advantages.

[0060] Specifically, the center ring 9 is vertically welded to the bottom plate 3 , and the center ring 9 is coaxial with the first through hole 301 .

[0061] The center ring 9 is coaxial with the first through hole 301, which ensures the symmetry and balance of the structure, improves the stability of the overall structure, ensures the quality of the weld, reduces welding defects, improves the strength and reliability of the welded joint, ensures the precise alignment of the center ring 9 and the first through hole 301, facilitates the insertion and welding of the center tube 7, reduces assembly difficulty, evenly distributes thermal stress, reduces local stress concentration, improves the durability of the structure, helps to simplify the welding process, reduces the time of alignment and positioning, and improves welding efficiency.

[0062] Specifically, the top diameter of the thin-walled tube 1 is not less than 400 mm, the height of the thin-walled tube 1 does not exceed 600 mm, and the diameter of the thin-walled tube 1 near the bottom plate 3 is not less than 400 mm.

[0063] The top diameter of the thin-walled tube 1 is not less than 400 mm, which provides sufficient operating space for welding the first reinforcement material 4 and the second reinforcement material 5, helps to ensure the welding quality between the first reinforcement material 4 and the thin-walled tube 1, between the second reinforcement material 5 and the thin-walled tube 1, and between the second reinforcement material 5 and the center ring 9, and improves the stability and reliability of the structure.

[0064] The diameter of the three places near the bottom plate is not less than 400mm: it ensures the welding operation space near the bottom, makes it easier for welders to reach the weld position, and reduces the difficulty of welding.

[0065] The height of the thin-walled tube 1 does not exceed 600 mm, ensuring the stability of the structure. A taller structure may increase the center of gravity and cause instability. The height of 600 mm ensures structural rigidity while also facilitating operation and transportation. The larger bottom diameter provides a wider support surface, enhances the stability of the structure, and reduces the risk of deformation under external loads.

[0066] This setting ensures that welders can perform welding operations conveniently, reduces welding difficulty, improves welding efficiency, and at the same time enhances the stability and rigidity of the structure.

[0067] Specifically, the height of the center ring 9 does not exceed 200 mm.

[0068] When the height of the center ring 9 does not exceed 200 mm, the welder can perform TIG welding on the center tube 7 and the center ring 9 from the first through hole 301. Through reasonable operation and parameter setting, the welding quality and structural stability can be ensured, and sufficient operating space can be ensured in the frame-type thin-walled structure for welding the center ring 9 and the second reinforcement material 5, thereby improving the reliability and stability of the structure.

[0069] Preferably, the height of the center ring 9 is in the range of 120-200 mm.

[0070] Specifically, the wall thickness of the center ring 9 is greater than that of the center tube 7 , the inner diameter or outer diameter of the center tube 7 and the center ring 9 are the same, and the height of the center ring 9 is greater than that of the second reinforcement material 5 .

[0071] Thicker wall thickness can provide higher structural strength and rigidity, ensuring that the center ring 9 is not easily deformed when subjected to external loads, thereby improving the stability of the entire structure. Moreover, thicker wall thickness can better disperse thermal stress, reduce the risk of thermal deformation and cracks generated during welding, facilitate docking before welding, and improve welding efficiency.

[0072] The same inner diameter or outer diameter can ensure that the butt joint surface during welding is smoother, reduce welding defects and improve welding quality. Due to the same inner diameter or outer diameter, single-sided welding and double-sided forming technology can be more easily implemented, ensuring that the weld can form a good shape on both sides, thereby improving the strength and reliability of the weld joint.

[0073] The height of the center ring 9 is greater than that of the second reinforcement 5 , which avoids the problem of being unable to weld the center tube 7 and the second reinforcement 5 , provides additional vertical support for the second reinforcement 5 , and enhances the stability of the structure.

[0074] This setting ensures the accessibility and convenience of welding operations, helps to disperse and transfer external loads, reduces local stress concentration, and significantly improves structural stability, welding quality, material utilization efficiency, operational convenience, thermal stress distribution, and maintenance and overhaul convenience.

[0075] Specifically, the inner diameter of the center ring 9 is equal to the diameter of the first through hole 301 , and the diameter of the sealing plate 8 is not greater than the diameter of the first through hole 301 .

[0076] The inner diameter of the center ring 9 is equal to the diameter of the first through hole 301, which ensures the precise alignment of the center ring 9 with the first through hole 301, enhances the stability of the structure, helps to reduce installation errors, and improves the accuracy of the overall structure. The diameter of the sealing plate 8 is not larger than the diameter of the first through hole 301, which facilitates the welding between the sealing plate 8, the base plate 3 and the center ring 9, ensures the stability of the structure and the convenience of operation, and avoids the external bulge of the base plate 3 affecting the appearance of the structure.

[0077] This arrangement achieves effective welding between the sealing plate 8, the bottom plate 3 and the center ring 9, avoids external protrusions of the bottom plate 3, helps to reduce installation errors, and improves the accuracy and aesthetics of the overall structure.

[0078] Specifically, a top plate 6 is provided on the top of the thin-walled tube 1 , and the cross section of the top plate 6 is annular.

[0079] The annular design of the top plate 6 closes the top of the thin-walled tube 1, provides structural support for the top, enhances the rigidity and stability of the overall structure, evenly distributes the load on the top, reduces local stress concentration, and improves the structure's compressive and deformation resistance.

[0080] Another object of the present invention is to disclose a process design for a frame-type thin-walled compact welded structural member, comprising the following specific steps:

[0081] S1: Weld the thin-walled tube 1, corner 2, and bottom plate 3 in sequence;

[0082] S2: Welding the first reinforcement material 4 to the inner wall of the thin-walled tube 1 along the circumferential direction;

[0083] S3: The second reinforcement member 5 is arranged perpendicularly to the first reinforcement member 4, and the second reinforcement member 5 is welded to the inner wall of the thin-walled tube 1;

[0084] S4: Weld the center ring 9 to the bottom plate 3, and weld the second reinforcement 5 to the outer wall of the center ring 9;

[0085] S5: Welding the center tube 7 and the center ring 9 from the first through hole 301;

[0086] S6: Welding the sealing plate 8 to the bottom plate 3 to close the first through hole 301;

[0087] S7: The top plate 6 is passed through the central tube 7 and welded to the end of the thin-walled tube 1 away from the bottom plate 3 .

[0088] The center ring 9 is installed first, leaving the center tube 7 uninstalled, leaving the internal space of the frame-type thin-walled structural member approximately 900 mm in diameter. This ensures sufficient space for manual TIG welding, achieving full welds between the second reinforcement member 5 and the center ring 9, and between the center ring 9 and the base plate 3. The provision of the first through-hole 301 allows for welding between the center ring 9 and the center tube 7, avoiding the problem of insufficient welding space when the center tube 7 extends into the interior of the frame-type thin-walled structural member.

[0089] This setting optimizes the structural design and process design, and performs local optimization based on the structural design of the original steel equipment, maintaining the structural size and structural characteristics of the steel equipment, providing sufficient operating space for welding operations, and solving the problem that welding cannot be achieved in local positions of thin-walled and compact welded structural parts of titanium alloy frames. The structure is simple and easy to process.

[0090] Specifically, in step S5 , the central tube 7 and the central ring 9 are welded using a single-sided welding and double-sided forming technology.

[0091] The single-sided welding and double-sided forming technology of this setting can ensure that the weld is evenly formed on both sides. Since the weld can form a good shape on both sides, welding defects such as pores and cracks are reduced, the strength and reliability of the weld joint are improved, the quality and appearance of the weld are improved, the welding process is simplified, the time for multiple flipping and positioning is reduced, and the continuity and consistency of the welding are improved.

[0092] Example 1

[0093] Structural design of a frame-type thin-walled compact welded structural component

[0094] like Figure 2-3As shown, all components are made of titanium alloy, the inner diameter of the end of the thin-walled tube 1 away from the bottom plate 3 is greater than 950 mm, the height of the thin-walled tube 1 is 600 mm, the inner diameter of the center tube 7 is 230 mm, the inner diameter of the outer wall of the center tube 7 away from the end of the thin-walled tube 1 away from the bottom plate 3 is 360 mm, and the inner diameter of the outer wall of the center tube 7 away from the end of the thin-walled tube 1 close to the bottom plate 3 is 200 mm.

[0095] The structure follows the steel structure design, and its structural dimensions and structural form are consistent with the steel structure. Only local optimization and adjustment are made to the structural design, and the original bottom plate 3 is decomposed into the bottom plate 3 and the sealing plate 8, and the original center tube 7 is decomposed into the center tube 7 and the center ring 9. The purpose of decomposing the bottom plate 3 into the bottom plate 3 and the sealing plate 8 is to realize the welding of the butt weld between the center ring 9 and the center tube 7. The purpose of decomposing the center tube 7 into the center tube 7 and the center ring 9 is to complete the assembly welding of the component in two stages. The center ring 9 is installed first, and the center tube 7 is not installed, providing an operating space of about 900mm diameter for internal welding of the equipment, which can realize manual TIG welding and solve the problem that local positions of thin-walled and compact welded structural parts of titanium alloy frames cannot be welded.

[0096] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A frame-type thin-walled compact welding structure for welding titanium alloy parts in narrow spaces, characterized in that: It comprises a thin-walled tube (1), a corner (2), a bottom plate (3), a first reinforcing material (4), a second reinforcing material (5), a top plate (6), a central tube (7), a sealing plate (8) and a central ring (9), wherein the thin-walled tube (1), the corner (2) and the bottom plate (3) are welded and connected in sequence to form a thin-walled structure; The top plate (6) is provided at one end of the thin-walled tube (1) away from the bottom plate (3); The bottom plate (3) is provided with a first through hole (301) for facilitating welding connection between the central tube (7) and the central ring (9); The center ring (9) is welded to the bottom plate (3), and the center ring (9) is capable of completely covering the first through hole (301); The first reinforcement material (4) is circumferentially welded to the inner wall of the thin-walled tube (1); The second reinforcing material (5) is welded to the inner wall of the thin-walled tube (1), the length direction of the second reinforcing material (5) is perpendicular to the plane where the first reinforcing material (4) is located, and one end of the second reinforcing material (5) is welded to the outer wall of the center ring (9) to form a frame-type welded structure; The central tube (7) extends into the frame-type thin-walled structure and is welded to the central ring (9), and the radial distance between the outer wall of the central tube (7) and the inner wall of the thin-walled cylinder (1) does not exceed 400 mm; The sealing plate (8) is used to seal the first through hole (301).

2. The frame-type thin-walled compact welded structural member according to claim 1, characterized in that: The wall thickness of the center ring (9) is greater than that of the center tube (7), the center tube (7) and the center ring (9) have the same inner diameter or outer diameter, and the height of the center ring (9) is greater than the height of the second reinforcement material (5).

3. The frame-type thin-walled compact welded structural member according to claim 1, characterized in that: The center ring (9) is vertically welded to the bottom plate (3), and the center ring (9) is coaxial with the first through hole (301).

4. The frame-type thin-walled compact welded structural member according to claim 3, characterized in that: The diameter of the first through hole (301) is larger than the diameter of the sealing plate (8) and smaller than the outer diameter of the center ring (9); the diameter of the sealing plate (8) is larger than the inner diameter of the center ring (9).

5. The frame-type thin-walled compact welded structural member according to claim 1, characterized in that: The cross section of the top plate (6) is annular.

6. The frame-type thin-walled compact welded structural member according to claim 1, characterized in that: The diameter of the end of the thin-walled tube (1) away from the bottom plate (3) is not less than 600 mm, and the diameter of the thin-walled tube (1) adjacent to the bottom plate (3) is not less than 400 mm.

7. The frame-type thin-walled compact welded structural member according to claim 1, characterized in that: When the inner diameter of the center ring (9) is not greater than 400 mm, the height of the center ring (9) is not greater than 200 mm.

8. The frame-type thin-walled compact welded structural member according to claim 1, characterized in that: The thin-walled tube (1), the corner (2), the bottom plate (3), the first reinforcing material (4), the second reinforcing material (5), the top plate (6), the center tube (7), the sealing plate (8) and the center ring (9) are all made of titanium alloy.

9. A welding process for a frame-type thin-walled compact welded structural member, characterized in that: The method for processing the frame-type thin-walled compact welded structural member according to any one of claims 1 to 8 includes the following specific steps: S1: welding the thin-walled tube (1), the corner (2), and the bottom plate (3) in sequence; S2: Welding the first reinforcement material (4) to the inner wall of the thin-walled tube (1) along the circumferential direction; S3: The second reinforcing material (5) and the first reinforcing material (4) are arranged vertically, and the second reinforcing material (5) is welded to the inner wall of the thin-walled tube (1); S4: welding the center ring (9) to the bottom plate (3), and welding the second reinforcement material (5) to the outer wall of the center ring (9); S5: welding the central tube (7) and the central ring (9) through the first through hole (301); S6: welding the sealing plate (8) to the bottom plate (3) to close the first through hole (301); S7: The top plate (6) is passed through the central tube (7) and welded to an end of the thin-walled tube (1) away from the bottom plate (3).

10. The welding process of the frame type thin-walled compact welded structural member according to claim 9, characterized in that: In step S5, the central tube (7) and the central ring (9) are welded using a single-sided welding and double-sided forming technology.

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