An omega-shaped metal ring for connecting thin-walled round tubes, an assembly of an omega-shaped metal ring and a composite material thin-walled round tube, and a molding method thereof

Abstract

The present invention belongs to the field of mechanical design technology, and particularly relates to an Ω-shaped metal ring for connecting composite thin-walled circular tubes, an Ω-shaped metal ring and a composite thin-walled circular tube assembly and a molding method thereof, the Ω-shaped metal ring comprising an Ω-shaped metal ring body, the Ω-shaped metal ring body comprising an Ω-shaped corrugated portion and a circular tube portion extending outward along the outer edge of the Ω-shaped corrugated portion, the wall thickness of the circular tube portion being greater than the wall thickness of the Ω-shaped corrugated portion, the connection between the circular tube portion and the Ω-shaped corrugated portion being formed with a chamfered portion forming a continuous arc transition, and the outer edge end of the circular tube portion being formed with a shoulder whose wall thickness is thicker than that of the circular tube portion. In the present invention, the Ω-shaped metal ring structure can reduce the problems of low strength and large deformation of traditional U-shaped or V-shaped metal ring structures, and provide a connection structure solution for multi-component modular mechanical equipment that simultaneously meets multi-dimensional requirements such as strength, vibration, deformation control, and connection sealing.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical design, and in particular relates to an Ω-shaped metal ring for connecting thin-walled round tubes, an assembly component of the Ω-shaped metal ring and a composite material thin-walled round tube, and a molding method thereof. Background Art

[0002] Composite thin-walled circular tubes are a typical structure in mechanical equipment, and metal rings are usually used as connections between multiple sections of composite thin-walled circular tubes.

[0003] Traditional metal rings are mostly U-shaped or V-shaped structures. Metal rings of this shape have defects such as large structural stress and large deformation during use, which are prone to structural failure. In addition, the sealing performance of the connection between the metal ring and the thin-walled circular tube of the composite material is low, which cannot meet the use requirements of advanced machinery in complex load environments.

[0004] We have carried out optimization design of metal ring structures and invented a new type of metal ring solution that can solve the weakness of low strength of traditional U-shaped or V-shaped metal ring structures and meet the connection needs of thin-walled circular tubes of composite materials. This is of great significance to the design and use of mechanical connection structures. Summary of the invention

[0005] In order to solve the problems existing in the above-mentioned prior art, the present invention provides an Ω-shaped metal ring structure for connecting thin-walled circular tubes, which reduces the problems of low strength and large deformation of traditional U-shaped or V-shaped metal ring structures, and provides a connection structure solution for multi-component modular mechanical equipment that simultaneously meets the multi-dimensional requirements of strength, vibration, deformation control, connection sealing, etc.

[0006] The technical solution adopted by the present invention to solve this problem is:

[0007] An Ω-shaped metal ring for connecting thin-walled circular tubes comprises an Ω-shaped metal ring main body, wherein the Ω-shaped metal ring main body comprises an Ω-shaped corrugated portion and a circular tube portion extending outwardly along the outer edge of the Ω-shaped corrugated portion, wherein the wall thickness of the circular tube portion is greater than the wall thickness of the Ω-shaped corrugated portion, a chamfered portion for forming a continuous arc transition is formed at the connection between the circular tube portion and the Ω-shaped corrugated portion, and a shoulder with a thicker wall thickness than that of the circular tube portion is formed at the outer edge end of the circular tube portion.

[0008] Preferably, the Ω-shaped metal ring body is made of high-strength aluminum alloy, titanium alloy or structural steel.

[0009] Further preferably, the corrugation inclination angle α of the Ω-shaped corrugated portion is 6° to 10°, the wave depth of the Ω-shaped corrugated portion is 10 to 15 mm, the wave width is 5 to 10 mm, and the wall thickness is 1 to 2 mm.

[0010] More preferably, the diameter of the circular tube portion is 100-500 mm, the length is 10-50 mm, and the wall thickness is 4-7 mm.

[0011] More preferably, the chamfered portion is chamfered at a position of R3 to R8 (unit: mm).

[0012] More preferably, the shoulder is 50 to 80 mm long, and the wall thickness of the shoulder is 1 to 3 mm thicker than that of the circular tube.

[0013] The second inventive object of the present invention is to provide an Ω-shaped metal ring and composite material thin-walled circular tube assembly, including an inner tube, the Ω-shaped metal ring body is interference fit and glued to the stop of the inner tube, and the Ω-shaped metal ring body and the inner tube are matched with the surface contour of the inner tube to apply high tension and be wrapped and cured with a composite material layer.

[0014] Preferably, an assembly groove for fitting the circular tube is provided on the periphery of the stopper of the inner cylinder, and the composite material layer comprises a glass fiber composite material layer and a carbon fiber composite material layer which are sequentially wound around the inner cylinder and the Ω-shaped metal ring body.

[0015] Further preferably, the glass fiber composite material layer has a thickness of 1 to 3 mm and is wound around the outside of the round tube, with a single-layer winding tension of 20 to 80N.

[0016] Further preferably, the carbon fiber composite material layer has a thickness of 5 to 15 mm, is wound around the outside of the glass fiber composite material layer, and has a single layer tension of 50 to 150 N.

[0017] The third invention objective of the present invention is to provide a method for forming an Ω-shaped metal ring and a composite material thin-walled circular tube assembly, comprising the following steps:

[0018] S101: using the shoulder to fit the circular tube portion of the Ω-shaped metal ring body into the assembly groove of the inner tube, and the Ω-shaped corrugated portion of the Ω-shaped metal ring body is fitted on the stop of the inner tube by interference fit and gluing, with the interference fit being 0.1-0.3 mm;

[0019] S102: applying a large tension to wind a glass fiber composite material layer on the Ω-shaped metal ring body and the inner cylinder in accordance with the surface contours of the Ω-shaped metal ring body and the inner cylinder;

[0020] S103: applying a large tension to the glass fiber composite material layer and winding the carbon fiber composite material layer to form an Ω-shaped metal ring and a composite material thin-walled circular tube assembly component after curing.

[0021] The advantages and positive effects of the present invention are:

[0022] 1. In the present invention, the Ω-shaped metal ring structure can reduce the problems of low strength and large deformation of the traditional U-shaped or V-shaped metal ring structure, and provide a connection structure solution for multi-component modular mechanical equipment that simultaneously meets the multi-dimensional requirements of strength, vibration, deformation control, etc.

[0023] 2. The Ω-shaped metal ring in the present invention can effectively reduce the stress at the corrugation of the composite thin-walled circular tube during use and reduce the deformation of the composite thin-walled circular tube, thereby improving the strength safety margin of the connection structure while retaining appropriate stiffness performance.

[0024] 3. In the present invention, the circular tube portion with the shoulder can help improve the assembly processability of the Ω-shaped metal ring and the inner tube, and facilitate the positioning and assembly of the Ω-shaped metal ring body on the inner tube. At the same time, the shoulder and the composite material layer are engaged with each other, and the shoulder is tightly clamped between the composite material layer and the inner tube, thereby limiting the axial displacement of the Ω-shaped metal ring body, making the entire mechanical connection structure not easy to loosen axially in the working state. At the same time, the shoulder structure is used to increase the sealing path, thereby improving the local connection strength and structural sealing.

[0025] 4. In the present invention, the glass fiber composite material layer and the carbon fiber composite material layer that are wound with high tension can provide sufficient prestress for the Ω-shaped metal ring, so as to further reduce the structural stress of the Ω-shaped metal ring in the working state and improve the structural safety margin. Through the design of a suitable tension system, the radial deformation between the Ω-shaped metal ring and the multi-section composite thin-walled circular tube connected to it can also be coordinated, the bending stress inside the connection structure can be reduced, and the risk of failure of the entire assembly due to uncoordinated deformation can be reduced. In addition, the high tension winding will effectively increase the contact pressure between the Ω-shaped metal ring and the composite circular tube, and enhance the sealing of the connection structure.

[0026] 5. The technical solution of the present invention fills the technical gap in the industry at home and abroad. In the domestic manufacturing of advanced composite thin-walled circular tubes, there has been a lack of connecting components that can simultaneously meet the requirements of strength, vibration, deformation control and connection sealing. The technical solution of the present invention fills the domestic technical gap in this field and promotes the progress of domestic advanced composite thin-walled circular tube type equipment design and manufacturing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0028] Figure 1 This is a structural diagram of the Ω-shaped metal ring in Example 1 of the present invention.

[0029] Figure 2 This is a diagram of the winding and assembly components of the Ω-shaped metal ring in Example 2 of the present invention.

[0030] In the figure: 1-Ω-shaped corrugated portion; 2-chamfered portion; 3-circular tube portion; 4-shoulder; 5-inner tube; 6-glass fiber composite material layer; 7-carbon fiber composite material layer. DETAILED DESCRIPTION

[0031] First of all, it should be noted that the specific structure, features and advantages of the present invention will be specifically described below by way of example, but all descriptions are only for illustration and should not be understood as limiting the present invention in any way. In addition, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature displayed or implied in the drawings, can still be combined or deleted between these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned in this document. In addition, in order to simplify the drawings, the same or similar technical features may be marked only in one place in the same drawing.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", "fixation", "screwing" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The present invention is described in detail below with reference to the accompanying drawings.

[0033] Embodiment 1:

[0034] An Ω-shaped metal ring for connecting thin-walled circular tubes, specifically: as an Ω-shaped metal ring for connecting thin-walled circular tubes of a composite material, comprising an Ω-shaped metal ring body, wherein the Ω-shaped metal ring body comprises an Ω-shaped corrugated portion 1 and a circular tube portion 3 extending outward along the outer edge of the Ω-shaped corrugated portion 1, wherein the wall thickness of the circular tube portion 3 is greater than the wall thickness of the Ω-shaped corrugated portion 1, a chamfered portion 2 for forming a continuous arc transition is formed at the connection between the circular tube portion 3 and the Ω-shaped corrugated portion 1, and a shoulder 4 with a wall thickness thicker than that of the circular tube portion 3 is formed at the outer edge end of the circular tube portion 3.

[0035] In this embodiment, Figure 1As shown, the metal rings used between multi-section composite thin-walled circular tubes are designed to be Ω-shaped. Compared with the traditional U-shaped or V-shaped metal ring structure, the Ω-shaped metal ring structure can reduce the problems of low strength and large deformation of the traditional U-shaped or V-shaped metal ring structure, and provide a connection structure solution for multi-component modular mechanical equipment that simultaneously meets the multi-dimensional requirements of strength, vibration, deformation control, and connection sealing. Specifically: the Ω-shaped metal ring body includes an Ω-shaped corrugated portion 1, a circular tube portion 3 and a chamfered portion 2 connected between the two by a continuous arc transition, which can effectively reduce the stress at the corrugation during the use of the composite thin-walled circular tube and reduce the deformation of the composite thin-walled circular tube, while retaining appropriate stiffness performance. On the basis of improving the strength safety margin of the connection structure; the wall thickness of the circular tube portion 3 is greater than the wall thickness of the Ω-shaped corrugated portion 1, and the outer edge end of the circular tube portion 3 is upwardly protruded to form a shoulder 4 with a thicker wall thickness than the circular tube portion 3. The circular tube portion with the shoulder can help improve the assembly processability of the Ω-shaped metal ring and the inner tube, and facilitate the positioning and assembly of the Ω-shaped metal ring body on the inner tube. At the same time, the shoulder and the composite material layer are interlocked, and the shoulder is tightly stuck between the composite material layer and the inner tube, thereby limiting the axial displacement of the Ω-shaped metal ring body, so that the entire mechanical connection structure is not easy to loosen axially in the working state, thereby improving the local connection strength and structural sealing.

[0036] Furthermore, in this embodiment, in order to improve the structural strength of the Ω-shaped metal ring body, the Ω-shaped metal ring body is made of high-strength aluminum alloy, titanium alloy or structural steel.

[0037] Furthermore, in this embodiment, it can also be considered that Figure 1 As shown, the corrugation inclination angle α of the Ω-shaped corrugated portion 1 is 6° to 10°, the wave depth of the Ω-shaped corrugated portion 1 is 10 to 15 mm, the wave width is 5 to 10 mm, the wall thickness is 1 to 2 mm, the Ω-shaped corrugated portion 1 is composed of an arc surface at the bottom and a side surface gradually converged from the edge of the arc surface toward the central axis of the Ω-shaped corrugated portion, and the angle between the side surfaces symmetrical about the central axis of the Ω-shaped corrugated portion is the corrugation inclination angle α. Preferably, the corrugation inclination angle α is 6° to 10°, and the side surface of the Ω-shaped corrugated portion 1 is transitionally connected to the circular tube portion 3 through the chamfered portion 2, so that the Ω-shaped corrugated portion 1 can be assembled on the stop of the inner tube 5 by an interference fit.

[0038] Furthermore, in this embodiment, it can also be considered that the diameter of the circular tube portion 3 is 100-500 mm, the length is 10-50 mm, and the wall thickness is 4-7 mm.

[0039] Furthermore, in this embodiment, it can also be considered that the chamfered portion 2 is chamfered at a position of R3 to R8 (unit: mm).

[0040] Furthermore, in this embodiment, in order to improve the local connection strength and the structural sealing, it is also considered that, as a preference, the shoulder 4 is 50 to 80 mm long and the wall thickness of the shoulder 4 is 1 to 3 mm thicker than that of the circular tube 3 .

[0041] Embodiment 2:

[0042] An Ω-shaped metal ring and composite material thin-walled circular tube assembly component includes an inner tube 5. The Ω-shaped metal ring body in Example 1 is interference fit on the stop of the inner tube. Preferably, the interference is 0.1 to 0.3 mm. The Ω-shaped metal ring body and the inner tube are wrapped and cured with a composite material layer in accordance with the surface contour of the inner tube.

[0043] In this embodiment, Figure 2 As shown, the Ω-shaped metal ring body with a shoulder helps to facilitate the positioning and assembly of the Ω-shaped metal ring body on the inner cylinder. At the same time, after the assembly component is assembled, the shoulder and the composite material layer are engaged with each other, and the shoulder is tightly clamped between the composite material layer and the inner cylinder, thereby limiting the axial displacement of the Ω-shaped metal ring body, making it difficult for the entire mechanical connection structure to loosen axially in the working state. At the same time, the shoulder structure is used to increase the sealing path, thereby improving the local connection strength and structural sealing.

[0044] Furthermore, in the present embodiment, in order to ensure the adaptable installation of the Ω-shaped metal ring body and the inner tube 5, an assembly groove for adapting the assembly of the circular tube portion is opened on the outer periphery of the stopper of the inner tube 5. After the assembly is completed, the outer surface of the shoulder is flush with the outer surface of the inner tube 5. The composite material layer includes a glass fiber composite material layer 6 and a carbon fiber composite material layer 7 which are sequentially wound around the inner tube and the Ω-shaped metal ring body.

[0045] Furthermore, in this embodiment, it can also be considered that the glass fiber composite material layer 6 has a thickness of 1 to 3 mm and is wound around the outside of the circular tube 5, with a single-layer winding tension of 20 to 80 N, and the tension decreases layer by layer in a certain proportion to achieve the same residual tension in each layer.

[0046] Furthermore, in this embodiment, it can also be considered that the thickness of the carbon fiber composite material layer 7 is 5 to 15 mm, which is wound around the outside of the glass fiber composite material layer 6, with a single layer tension of 50 to 150 N, and the tension decreases layer by layer in a certain proportion to achieve the same residual tension in each layer.

[0047] Embodiment 3:

[0048] A method for forming an Ω-shaped metal ring and a composite material thin-walled circular tube assembly, comprising the following steps:

[0049] S101: Using the shoulder 4, the circular tube portion 3 of the Ω-shaped metal ring body is fitted into the assembly groove of the inner tube 5, and the Ω-shaped corrugated portion 1 of the Ω-shaped metal ring body is interference fit on the stopper of the inner tube 5, and the interference amount is 0.1-0.3 mm;

[0050] S102: applying a large tension to wind a glass fiber composite material layer 6 on the Ω-shaped metal ring body and the inner tube 5 in accordance with the surface contours of the Ω-shaped metal ring body and the inner tube 5, the glass fiber composite material layer 6 covers and solidifies on the surface of the inner tube 5, the glass fiber composite material layer 6 and the shoulder are engaged with each other, and the shoulder is tightly stuck between the composite material layer and the inner tube;

[0051] S103: Apply high tension to the glass fiber composite material layer 6 to wrap the carbon fiber composite material layer 7, and the carbon fiber composite material layer 7 covers and solidifies on the surface of the glass fiber composite material layer 6. After the glass fiber composite material layer 6 and the carbon fiber composite material layer 7 are solidified, they together with the inner tube and the Ω-shaped metal ring body form an Ω-shaped metal ring and composite thin-walled circular tube assembly component.

[0052] The metal ring and composite thin-walled circular tube assembly component prepared by the molding method, as a mechanical connection structure, can have better strength performance than the traditional U-shaped metal ring while ensuring that the required structural stiffness performance remains basically unchanged, and can better meet the use requirements of mechanical equipment. In addition, the glass fiber composite material layer and the carbon fiber composite material layer applied with high tension winding can provide sufficient prestress for the Ω-shaped metal ring, so as to further reduce the structural stress of the Ω-shaped metal ring in the working state and improve the structural safety margin. Through the design of a suitable tension system, the radial deformation between the Ω-shaped metal ring and the multi-section composite thin-walled circular tube connected to it can also be coordinated, the bending stress inside the connection structure can be reduced, and the risk of failure of the entire assembly component due to uncoordinated deformation can be reduced. In addition, the high tension winding will effectively increase the contact pressure between the Ω-shaped metal ring and the composite circular tube, and enhance the sealing of the connection structure.

[0053] Application Example 1:

[0054] An Ω-shaped metal ring and composite material thin-walled circular tube assembly is prepared using the molding method of the Ω-shaped metal ring and composite material thin-walled circular tube assembly in Example 3, wherein: the wall thickness of the Ω-shaped corrugated portion 1 is 1 mm, the wave width is 5 mm, the wave depth is 10 mm, and the wave inclination angle α is 8°; the diameter of the circular tube portion 3 is 200 mm, the length is 35 mm, and the wall thickness is 4 mm; the radius R5 of the chamfered portion connected to the Ω-shaped corrugated portion; the length of the shoulder 4 is 50 mm, and the wall thickness is 5 mm.

[0055] The inner cylinder 5 is a carbon fiber composite material cylinder with a wall thickness of 5 mm. The glass fiber composite material layer 6 is 3 mm thick and is wound at a tension of 80N. The carbon fiber composite material layer 7 is 10 mm thick and is wound at a tension of 150N.

[0056] The Ω-shaped metal ring body is assembled on the stopper of the inner tube 5 by interference fit and gluing using the shoulder 4, and then the glass fiber and carbon fiber are wound in sequence, and after curing, an Ω-shaped metal ring and a composite thin-walled round tube assembly is formed. According to the above example, under normal use conditions of composite thin-walled round tubes, the Ω-shaped metal ring structure is used. Compared with the traditional U-shaped metal ring, under the same glass fiber and carbon fiber winding scheme, the optimization effect brought by the difference in the shape of the waveform structure is as follows:

[0057] (1) Strength performance. The structural stress of the Ω-shaped metal ring can be reduced by 10% to 20% compared with the traditional U-shaped metal ring. In particular, the maximum stress of weak structural parts such as troughs and chamfers can be reduced by more than 200 MPa, which can significantly improve the strength safety margin of the structure;

[0058] (2) Vibration performance. The difference in the bending stiffness and connection stiffness of the Ω-shaped metal ring compared to the traditional U-shaped metal ring is within 5%. In particular, the bending stiffness has an important influence on the critical bending vibration frequency of multi-section composite thin-walled circular tubes. The use of Ω-shaped metal rings can achieve the same effect as the traditional U-shaped metal ring, and the influence on the critical bending vibration frequency of multi-section composite thin-walled circular tubes can be controlled within the acceptable range of 10Hz.

[0059] (3) Deformation control. The Ω-shaped metal ring is combined with a high-tension double-layer wound composite material of glass fiber and carbon fiber. Compared with the traditional U-shaped metal ring, the radial deformation can be reduced by 30% to 50%, and the axial deformation can be reduced by 5% to 10%, which is beneficial to the stability of the overall structure of the composite thin-walled circular tube;

[0060] (4) Sealing performance. The Ω-shaped metal ring with shoulder is combined with a glass fiber and carbon fiber high-tension double-layer winding composite material. Compared with the traditional U-shaped metal ring, the vacuum single-point leak rate can be reduced from 10 -2 ~10 -4 Pa·m 3 / s level increased to 10 -6 Pa·m 3 / s level and above, which can meet the needs of using in more stringent vacuum sealing environments.

[0061] Therefore, the metal ring of the present invention is used to connect composite thin-walled circular tubes. While ensuring that the required structural vibration performance remains basically unchanged, the strength performance, deformation control and sealing performance are better than those of traditional U-shaped metal rings, and can better meet the use requirements of mechanical equipment under more complex loads and harsh environments.

[0062] The above embodiments describe the present invention in detail, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. An Ω-shaped metal ring for connecting composite thin-walled round tubes, characterized in that: The Ω-shaped metal ring body comprises an Ω-shaped corrugated portion (1) and a circular tube portion (3) extending outwardly along the outer edge of the Ω-shaped corrugated portion (1); the wall thickness of the circular tube portion (3) is greater than the wall thickness of the Ω-shaped corrugated portion (1); a chamfered portion (2) for forming a continuous arc transition is formed at the connection between the circular tube portion (3) and the Ω-shaped corrugated portion (1); and a shoulder (4) having a wall thickness thicker than that of the circular tube portion (3) is formed at the outer edge of the circular tube portion (3); The Ω-shaped corrugated portion (1) is composed of an arc surface at the bottom and a side surface gradually converged from the edge of the arc surface toward the central axis of the Ω-shaped corrugated portion. The angle between the side surfaces symmetrical about the central axis of the Ω-shaped corrugated portion is the corrugation inclination angle α, and the corrugation inclination angle α is 6° to 10°. The side surface of the Ω-shaped corrugated portion (1) is transitionally connected to the circular tube portion (3) through the chamfered portion (2), so that the Ω-shaped corrugated portion (1) can be assembled on the stop of the inner tube (5) by interference fitting.

2. The Ω-shaped metal ring for connecting composite thin-walled round tubes according to claim 1, characterized in that: The Ω-shaped metal ring body is made of high-strength aluminum alloy, titanium alloy or structural steel.

3. The Ω-shaped metal ring for connecting composite thin-walled round tubes according to claim 2, characterized in that: The Ω-shaped corrugated portion (1) has a wave depth of 10 to 15 mm, a wave width of 5 to 10 mm, and a wall thickness of 1 to 2 mm.

4. The Ω-shaped metal ring for connecting composite thin-walled round tubes according to claim 3, characterized in that: The diameter of the circular tube part (3) is 100-500 mm, the length is 10-50 mm, and the wall thickness is 4-7 mm.

5. The Ω-shaped metal ring for connecting composite thin-walled round tubes according to claim 4, characterized in that: The shoulder (4) is 50 to 80 mm long, and the wall thickness of the shoulder (4) is 1 to 3 mm thicker than that of the circular tube (3).

6. An Ω-shaped metal ring and composite material thin-walled circular tube assembly, comprising an inner tube (5), characterized in that: The Ω-shaped metal ring as described in any one of claims 1 to 5 is interference-fitted on the stop of the inner cylinder (5), and a composite material layer is wound and cured on the Ω-shaped metal ring body and the inner cylinder (5) in accordance with the surface contour of the inner cylinder (5).

7. The Ω-shaped metal ring and composite material thin-walled circular tube assembly according to claim 6, characterized in that: An assembly groove for fitting the circular tube portion (3) is provided on the periphery of the stopper of the inner tube (5), and the composite material layer comprises a glass fiber composite material layer (6) and a carbon fiber composite material layer (7) which are sequentially wound around the inner tube (5) and the Ω-shaped metal ring body.

8. The Ω-shaped metal ring and composite material thin-walled circular tube assembly according to claim 7, characterized in that: The glass fiber composite material layer (6) has a thickness of 1 to 3 mm and is wound around the outside of the inner tube (5), with a single-layer winding tension of 20 to 80 N.

9. The Ω-shaped metal ring and composite material thin-walled circular tube assembly according to claim 7, characterized in that: The carbon fiber composite material layer (7) has a thickness of 5 to 15 mm and is wound around the outside of the glass fiber composite material layer (6), with a single layer tension of 50 to 150 N.

10. A method for forming an Ω-shaped metal ring and a composite material thin-walled circular tube assembly as claimed in claim 7, characterized in that: The following steps are involved: S101: using the shoulder (4) to fit the circular tube portion (3) of the Ω-shaped metal ring body into the assembly groove of the inner tube (5), and the Ω-shaped corrugated portion (1) of the Ω-shaped metal ring body is fitted on the stopper of the inner tube (5) by interference fit and gluing, with the interference amount being 0.1 to 0.3 mm; S102: Winding a glass fiber composite material layer (6) on the Ω-shaped metal ring body and the inner tube (5) in accordance with the surface contours of the Ω-shaped metal ring body and the inner tube (5); S103: Winding a carbon fiber composite material layer (7) onto the glass fiber composite material layer (6), and forming an Ω-shaped metal ring and a composite material thin-walled circular tube assembly component after curing.

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