A synchronous friction welding connector, an externally rotating synchronous friction welding double-layer hollow plate and its combined structure

Abstract

This application discloses a synchronous friction welding connector, an externally rotating synchronous friction welding double-layer cavity plate, and their combined structure, solving the problems of high welding difficulty inside the cavity of existing cavity plates and large differences in welding quality between the two ends of the double connectors. The key technical points are: the synchronous friction welding connector is cylindrical in shape, including a clamping section and a supporting section; the clamping section has a clamping part and a supporting shoulder, with the side of the supporting shoulder serving as the first welding surface; the end face of the supporting section away from the clamping section serves as the second welding surface; the first and second welding surfaces are used for welding connections with two spaced-apart components, respectively. By setting the supporting shoulder, the same friction welding parameters are formed at both ends of the connector, enabling synchronous welding of the connector to both ends of the panel and the base plate, resulting in consistent weld quality. Simultaneously, by setting the clamping part in the clamping section, friction welding is performed through an opening in one side of the panel, and the clamping section closes the opening after welding, solving the problem of welding inside small cavities.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cavity plate structure, in particular to a double connector for cavity plate, cavity plate and its combined structure. BACKGROUND

[0002] The cavity plate is a structure composed of outer layer plates and connectors arranged in the interlayer between the layer plates, and the interlayer can be filled with concrete and other filling materials to form a combined structure. Because of its light weight, simple structure, excellent mechanical properties, and modular construction, it effectively saves design and construction costs. Such structures are widely used as structural plates in bridges, super high-rise buildings, nuclear power plant safety shells, offshore platforms, and even in harsh stress environments such as wings and submarine pressure hulls.

[0003] In the cavity plate structure, the connectors in the interlayer are the key to ensuring that the two outer layer plates form a whole structure, and in the combined structure, they ensure reliable connection between the outer layer plates and the internal filling body, and the components work together.

[0004] In the prior art, according to different connection modes with outer side panels, the connecting pieces are mainly divided into two categories: single connecting piece and double connecting piece. In single connection, the connecting piece is connected with only one side of the panel, and then the two side panels form an integral structure through a filling body such as concrete. This connection mode is prone to relative movement during the construction stage and the use stage, and the bonding strength between the two side panels is low. Although the double connecting piece is greatly superior to the single connecting piece in terms of stress performance, it is difficult to operate due to its large construction difficulty, and mainly has the following shortcomings: 1. Since the double connecting piece needs to be fixedly connected with the panels on both sides, mainly by welding, the welding workload is large, and the welding quality at both ends of the connecting piece is difficult to be consistent, and the weak end becomes a high-risk area of fatigue cracking; 2. Due to the limited space between the double-layer panels, especially for small cavity panels with small overall thickness, it is difficult for the operator to enter the cavity interior to perform welding and other operations, and the narrow space welding becomes a bottleneck restricting the manufacture and wide application of the cavity panel; 3. The existing double connection mainly uses bolts, channel steels and the like as connecting pieces, and the length of the connecting piece is the distance between the two steel plates. Due to the precision error of the connecting piece, the length is different, and how to ensure the accurate distance between the two plates also becomes a difficult problem; 4. If the diameter of the bolt is too large, that is, a thicker connecting piece is used for a thinner panel, cracks are often caused in the panel, especially at the welding position of the panel and the bolt, and vice versa, if the diameter of the bolt is too small, the bolt is prone to buckling, and the concrete is crushed, and usually the diameter of the bolt is only 1.5 times the thickness of the outer side panel. Due to the small diameter of the bolt, the overall rigidity is insufficient, and a large number of bolts need to be densely arranged, which not only consumes labor and material costs, but also increases the probability of defects due to the large number of connecting points. Therefore, how to design and innovate a connecting piece which is convenient and quick to connect, can ensure the connection strength and has excellent mechanical properties is of great significance to the research and actual use of the cavity panel. SUMMARY

[0005] The application aims to solve the problems of great welding difficulty in the cavity of the existing cavity panel and great welding quality difference at both ends of the double connecting piece, and provides a synchronous friction welding connecting piece. Through the setting of the supporting shoulder, the connecting piece is welded with the panel and the base plate on both sides at one time, the friction welding parameters at both ends of the connecting piece are the same, and the welding quality is consistent. At the same time, a hole is opened on one side of the panel to connect and clamp the friction welding from the outside, and the clamping section fills the hole of the panel after the friction welding, forming a cavity panel with closed sides, and solving the problem of internal welding of small cavities.

[0006] In order to achieve the above application purposes, the application adopts the following technical solutions:

[0007] The first aspect of the application provides a synchronous friction welding connector for fixedly connecting two mutually spaced plate-shaped members by friction welding, the synchronous friction welding connector is in a cylindrical shape, comprising a clamping section and a supporting section; the clamping section comprises a clamping part and a supporting shoulder part, the clamping part is located at one end of the clamping section away from the supporting section, the clamping part is used for connecting a friction welding device, the supporting shoulder part is used for limiting the two plate-shaped members to move closer to each other, and a side surface of the supporting shoulder part is a first welding surface; an end surface of the supporting section away from the clamping section is a second welding surface; and the first welding surface and the second welding surface are respectively used for friction welding fixedly connecting the two plate-shaped members.

[0008] Preferably, the outer diameter of the supporting shoulder part at one end close to the supporting section is greater than the outer diameter at the other end. The supporting shoulder part can bear the pressing force of friction welding. During friction welding, only pressure needs to be applied from the outside of the panel to press the panel, the base plate and the connector, realize synchronous friction welding at both ends, extrude plastic melt at the same time of welding, form a dense welding interface, and the outer diameter of the supporting shoulder part changes along the axial direction, so that the expansion area of the first welding surface increases, that is, the welding interface of the friction welding is increased, and the weld performance is more stable.

[0009] Preferably, the supporting shoulder part is in a frustum shape or a horn shape. The supporting shoulder part in a frustum shape or a horn shape forms a first welding surface in a bevel shape, forms a bevel extrusion weld, is beneficial to reducing the shrinkage tensile stress of the welding area, and improves the weld connection strength.

[0010] Preferably, the supporting section is in a hollow cylindrical shape, the supporting section comprises a pipe body section and an embedded section along the axial direction, and the wall thickness of the embedded section is constant or decreases along the axial direction towards the second welding surface. The supporting section is in a hollow cylindrical shape, forms a thin-walled pipe shell-shaped connector, and the size of the outer diameter and the wall thickness can adjust the rigidity of the connector. The rigidity of the connector and the panel or the base plate at the welding connection is matched, in the cavity plate structure, the connector is mainly used for bearing shear force, the outer diameter of the hollow pipe-shaped connector can be larger than that of a solid rod, and the shear resistance is better. After the embedded section is welded with the base plate, the embedded section is embedded in the base plate, and on the basis of the original welded cross-section connection, a mechanical interlocking anchoring effect is formed, and the shear resistance is greatly improved.

[0011] The wall thickness of the embedded section is constant or decreases in order to construct a pressurized weld. During the friction welding process, the second welding surface of the synchronous friction welding connector first rubs against the base plate, the wall thickness decreases as it gets closer to the second welding surface, forms an end part in a knife edge shape, can form a drilling effect, completely extrudes molten slag and other impurities, forms a pure welding interface, and improves the welding strength.

[0012] As preferred, the support section further comprises a thickening section between the tube section and the embedding section, the thickening section having a wall thickness greater than that of the tube section. Since the embedding section is embedded into the base plate after welding, the thickening section becomes the part directly connected to the base plate and becomes the sensitive part of fatigue during the service of the subsequent cavity plate, increasing the wall thickness of the connection and improving the total contact area of the weld, further improving the fatigue resistance.

[0013] As preferred, the support section has a stepped surface at the connection with the clamping section. The stepped surface can serve as a limit for the upper welding and can also increase the overall welding area to improve the connection strength of the welded connection and the panel.

[0014] As preferred, the support section has a reinforcing rib on the inner or outer surface of the tube wall. The reinforcing rib can be an axial reinforcing rib or a circumferential reinforcing rib, which can be arranged on the outer wall or the inner wall of the tube. The reinforcing rib can effectively improve the strength of the thin-walled part, thereby improving the buckling resistance and stability during loading.

[0015] As preferred, the clamping section is a polygonal groove or a boss. The boss can be used for external structure connection and anchoring. The groove makes the application surface smoother and the overall surface flatness better.

[0016] As preferred, the clamping section and the support section are integrally formed. The integrally formed connection has better overall integrity and is suitable for smaller diameter connections.

[0017] As preferred, the clamping section and the support section are mutually sleeved and fixed by friction welding. The split synchronous friction welding connection is suitable for industrial automation processing and is suitable for larger diameter and smaller batch connections.

[0018] In the second aspect of the application, a synchronous friction welding double-layer cavity plate is provided, comprising the synchronous friction welding connection described above, and further comprising a panel and a base plate, the panel and the base plate being spaced apart, and the panel having a mounting hole; the synchronous friction welding connection is located between the panel and the base plate, and the supporting shoulder limits the movement of the panel towards the base plate; the synchronous friction welding connection, the panel and the base plate are fixed by synchronous friction welding, wherein the first welding surface is friction welded and fixedly connected to the hole wall of the mounting hole, and the second welding surface is friction welded and fixedly connected to the base plate.

[0019] As preferred, the panel, the base plate or the synchronous friction welding connection is made of metal, organic material or glass. Since friction welding is used for connection, unlike ordinary fusion welding, friction welding not only has high welding strength, but also can realize the connection of the same metal, different metals and organic materials without the need for additional welding materials, and has wider applicability.

[0020] As preferred, at least one of the panel and the base plate is a curved panel. The arc-shaped or streamline double-layer curved panel can be used in buildings, bridges, submarines, wings and other scenes.

[0021] In a third aspect, the application provides a double-layer cavity panel combination structure of the external rotation type synchronous friction welding, comprising the double-layer cavity panel of the external rotation type synchronous friction welding, and a filler is arranged in the cavity between the panel and the base plate. The combination structure of double connections is formed, such as used in a double-steel plate-concrete combination structure. Since the pipe shell is welded to the steel plates on both sides, the steel plates are resistant to tension, the concrete is pressure-bearing, and the pipe shell has good shearing resistance. The structure fully utilizes the performance of various components and various materials, and has a good application prospect.

[0022] Compared with the prior art, the above technical solution has the following beneficial effects:

[0023] 1. The application constructs a synchronous friction welding connecting piece with two upper and lower welding surfaces. The synchronous friction welding connecting piece is provided with a bearing shoulder. The clamping force applied by the external friction welding is transmitted to the synchronous friction welding connecting piece through the bearing shoulder, so that the forces acting on the first and second welding surfaces are the same. The clamping portion is rotated, and the rotational speeds of the two ends are the same. The two ends are welded at the same time and stopped at the same time, that is, the welding time is the same. The three core elements (pressure, rotational speed, and time) of the friction welding of the connecting piece at the two ends are consistent through the construction, and the effect of welding two surfaces at one time is constructed. It is difficult to simultaneously meet the process conditions of the two ends in the same welding operation, which is the core reason why synchronous welding at the two ends is rarely used. The construction method of the application solves this difficulty and realizes the major difficulty of synchronous welding at the two ends of the double connecting piece of the cavity plate. Since the synchronous friction welding at the two ends makes the three welding parameters the same, the welding quality at the two ends is stable and consistent, and the overall performance of the cavity plate is improved.

[0024] 2. Secondly, due to the limited space between the double-layer panel, the welding difficulty in the small cavity becomes a bottleneck restricting the application of the cavity plate. The connecting piece is provided with a clamping portion in the clamping section. A hole is opened in the panel on one side during welding. The friction welding equipment clamps and drives the rotation of the connecting piece from the outside of the cavity. The difficulty of welding in the small cavity is solved.

[0025] 3. At the same time, since the friction welding is different from the traditional welding, the stiffness of the welding patch at the opening is much lower than that of the base material in the traditional fusion welding. The friction welding has high welding joint quality, and the weld strength can reach the base material. The clamping section keeps the integrity of the outer panel after closing the mounting hole, ensures the stiffness of the panel, and is basically the same as that of the panel without the opening. In addition, the thickness of the opening position after welding is greater than that of the rest of the panel. The stiffness of the panel after welding is even higher than that of the panel base material, which maintains the integrity of the outer panel. At the same time, the cavity plate is closed, which can be used in sealed occasions. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Figure 1 is a perspective view of a double-layer cavity plate of an outer-rotation synchronous friction welding according to an embodiment of the present application;

[0027] Figure 2 Figure 2 is a plan view of a double-layer cavity plate of an outer-rotation synchronous friction welding according to an embodiment of the present application;

[0028] Figure 3 Figure 3 is an enlarged view of a portion of Figure 1; Figure 2

[0029] Figure 4 Figure 4 is a perspective view of a synchronous friction welding connecting piece according to an embodiment of the present application;

[0030] Figure 5 Figure 5 is a perspective view of another view of Figure 4; Figure 4

[0031] Figure 6 Figure 6 is a schematic view of a reinforcing rib provided on a pipe wall of the synchronous friction welding connecting piece according to an embodiment of the present application;

[0032] Figure 7 Figure 7 is a plan view of a synchronous friction welding connecting piece and a bottom plate according to an embodiment of the present application;

[0033] Figure 8 Figure 8 is a plan view of an end shape of a synchronous friction welding connecting piece according to an embodiment of the present application;

[0034] Figure 9 Figure 9 is a plan view of another end shape of a synchronous friction welding connecting piece according to an embodiment of the present application;

[0035] Figure 10 Figure 10 is a schematic view of a split synchronous friction welding connecting piece according to an embodiment of the present application;

[0036] Figure 11 Figure 11 is a plan view of a double-layer cavity plate of an outer-rotation synchronous friction welding according to an embodiment of the present application, in which a panel or a base plate is a curved panel;

[0037] Figure 12 Figure 12 is a plan view of a double-layer cavity plate combination structure of an outer-rotation synchronous friction welding according to an embodiment of the present application, in which a clamping portion is a boss;

[0038] Figure 13 Figure 13 is a plan view of a double-layer cavity plate combination structure of an outer-rotation synchronous friction welding according to an embodiment of the present application, in which a clamping portion is a groove.

[0039] ​​Fig. 1 is a synchronous friction welding connection; 11 is a clamping section; 110 is a supporting shoulder; 111 is a first welding surface; 112 is a clamping part; 12 is a supporting section; 121 is a second welding surface; 122 is a pipe body section; 123 is an embedded section; 124 is a thickening section; 125 is a stepped surface; 126 is a reinforcing rib; 2 is a panel; 21 is a mounting hole; 3 is a base plate; 4 is a filler. DETAILED DESCRIPTION

[0040] The application will be further described below with reference to the drawings. It should be noted that in the description of the application, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0041] Example 1:

[0042] As shown in Figure 1 , 2 is an outer rotation type synchronous friction welding double-layer cavity plate, which comprises a plurality of synchronous friction welding connectors 1, a panel 2 and a base plate 3, the panel 2 and the base plate 3 are spaced apart, and the panel 2 and the base plate 3 have a sandwiched layer therebetween.

[0043] As shown in Figures 3 to 7 , the synchronous friction welding connector 1 is in the shape of a cylinder, comprising a clamping section 11 and a supporting section 12. As shown in Figure 4 , the clamping section 11 and the supporting section 12 are integrally formed, which is better in integrity, but a split structure can also be used, as shown in Figure 10 is a split connector 1, the clamping section 11 and the supporting section 12 are connected by friction welding, and the split structure is suitable for the manufacture of larger connectors. The clamping section 11 is connected to the supporting section 12 at one end; the clamping section 11 has a clamping part 112, which is a polygonal groove or a boss, as shown in Figure 6 the clamping part is a boss, which can play a role in connecting or anchoring with the external structure. The clamping part 112 is located away from the supporting section 12, and the clamping part 112 is connected to the external friction welding device during friction welding. The clamping section 11 also includes a supporting shoulder 110, which can support the panel 2 when the clamping section 11 is subjected to a pressing force during welding, preventing it from sliding towards the base plate 3, so that the outer diameter of the supporting shoulder 110 changes along the axial direction, and the outer diameter of the end close to the supporting section 12 is preferably larger than that of the other end, as shown in Figure 4The outer shape of the supporting shoulder 110 is similar to a frustum, and can also be a horn shape or other shapes, and the side surface of the supporting shoulder 110 is a first welding surface 111. The supporting section 12 is a hollow cylindrical shape, and the end surface of the supporting section 12 away from the clamping section 11 is a second welding surface 121.

[0044] As shown in Figure 2 The mounting hole 21 is provided on the panel 2, and the mounting hole 21 is matched with the supporting shoulder 110. The synchronous friction welding connector 1 and the panel 2 and the base plate 3 are welded and fixed by synchronous friction welding. The first welding surface 111 is welded and connected with the hole wall of the mounting hole 21, and the second welding surface 121 is welded and connected with the base plate 3.

[0045] During friction welding, the friction welding pressure is first applied to the panel 2. The opening on the panel 2 is consistent with the outer contour of the supporting shoulder 110 of the synchronous friction welding connector 1. The structure is matched with the supporting shoulder 110 of the synchronous friction welding connector 1 and is pressed against each other. Then the friction welding pressure is transmitted to the supporting shoulder 110 of the synchronous friction welding connector 1, and then is transmitted to the base plate 3 located at the distal end through the supporting section 12. In this way, through the setting of the supporting shoulder 110, the external friction welding force, the first welding surface 111 force close to one end of the panel 2, and the second welding surface 112 force close to the distal end of the base plate 3 are equal, forming the reality of the manufacture of the two-end friction welding and the process condition of the stable friction welding pressure, and forming the favorable condition of the same parameters, so that the process parameters used for one-end welding in the traditional friction welding can be used for two-end welding at the same time. It is very difficult to meet the process conditions of both ends in the same welding operation, which is the core reason why two-end synchronous welding is rarely used. The construction method of the present application solves this difficulty and realizes the two-end synchronous welding of the double connector of the cavity plate, especially solves the major difficulty of the two-end synchronous welding of the small cavity. Because of the two-end synchronous friction welding, the three welding parameters are the same, the welding quality of both ends is stable and consistent, and the overall performance of the cavity plate is improved. At the same time, two-end welding can be carried out at one time, and the welding efficiency is improved.

[0046] Secondly, due to the limited space between the double-layer panel, the welding difficulty in the small cavity becomes the bottleneck restricting the application of the cavity plate, as Figure 3 shown, the connector 1 of the present application is provided with a clamping section 112 at the clamping section 12. An installation hole 21 is provided on one side of the panel 2 during welding. The friction welding equipment clamps the connector 1 from the outside of the cavity and drives it to rotate. Further, after welding, the clamping section 11 is similar to a sealing plate, which seals the opening on the panel 2. Unlike traditional welding, the welding of the opening by the welding patch is much lower than the stiffness of the base material. The friction welding has high welding joint quality, and the weld strength can reach the base material. After the clamping section seals the mounting hole, the integrity of the outer panel is maintained, and the stiffness of the panel is basically the same as that of the unopened hole, effectively solving the difficulty of welding in the small cavity.

[0047] The frustum-shaped or flared support shoulder 110 forms a tapered, inclined first welding surface 111, which not only increases the welding area of ​​the first welding surface 111 but also forms an inclined, extruded weld, which helps reduce shrinkage tensile stress in the weld zone and improves the weld connection strength. The connector 1 is hollow inside. Unlike solid studs, hollow cylindrical connectors have multiple parameters such as outer diameter, wall thickness, and connector spacing to adjust the contradiction between shear resistance and stiffness, offering greater design flexibility. In solid studs, however, the diameter determines everything, dictating both shear resistance and stiffness, and lacks adjustability. Furthermore, as... Figure 6 As shown, reinforcing ribs 126 can be provided on the inner or outer surface of the support section 12 to improve the buckling resistance of the thin-walled cylindrical component.

[0048] like Figure 7 , 8 As shown in Figure 9, the support section 12 includes a pipe section 122, a thickened section 124, and an embedded section 123 along the axial direction. The wall thickness of the thickened section 124 is greater than that of the pipe section 122. The wall thickness of the embedded section 123 remains constant or decreases along the axial direction towards the second welding surface 121. The embedded section of the second welding surface includes three forms: one is embedded with a constant pipe wall thickness; two is embedded with a reduced pipe wall thickness; three is embedded with a thickened pipe wall followed by a constant wall thickness; and four is embedded with a thickened pipe wall followed by a thinned wall thickness. In friction welding, the equal or reduced wall thickness of the embedded section 123 is to construct a pressure-increasing weld. The first point of friction between the synchronous friction welding connector 1 and the substrate 3 is the second welding surface 121. The closer to the second welding surface 121, the smaller the wall thickness, forming a blade-like end that can create a drilling effect, preventing incomplete welding, and thoroughly squeezing out impurities such as molten weld slag, forming a pure welding interface and improving welding strength. Figure 6 As shown, the connection between the support section 12 and the clamping section 11 also has a stepped surface 125. The stepped surface 125 can serve as a limit for the upper welding and can also increase the overall welding area, thereby improving the connection strength between the welded connector 1 and the panel 2.

[0049] Example 2:

[0050] like Figure 11 As shown, an externally rotating synchronous friction-welded double-layer cavity plate is provided, which differs from Embodiment 1 in that the panel 2 and the substrate 3 are curved panels. The panel 2 or substrate 3 is made of one of the following materials: metal, organic material, or glass. The curved or streamlined double-layer panel can be used not only in buildings and bridges, but also in cavity plate structures with irregular shapes, such as submarines and aircraft wings.

[0051] Example 3:

[0052] like Figure 12 , 13The combination structure of the outer rotation type synchronous friction welding double-layer cavity plate is shown. The filler 4 is cast in the cavity between the face plate 2 and the base plate 3 of the synchronous friction welding double-layer cavity plate in Embodiment 1 or 2 to form the combination structure. For example, the face plate and the base plate are steel plates, and the concrete is cast to form a double-steel plate-concrete combination structure. The steel plates on both sides bear tension, and the concrete bears pressure. The structure can fully exert the performance of each component and each material, and has a wide application prospect. Figure 12 The combination structure is shown. The connecting piece 1 has a boss-shaped clamping part 112. After welding, the boss is higher than the outer surface of the face plate 2. The boss can play a role in connecting or anchoring with the external structure. Figure 13 The combination structure is shown. The connecting piece 1 has a groove-shaped clamping part 112. After welding, the upper surface of the connecting piece is basically flush with the outer surface of the face plate 2. The structure is suitable for occasions where the application surface needs to be flat and smooth.

[0053] The above describes the preferred embodiments of the present application. Those skilled in the art can make several modifications and improvements without departing from the principles of the present application. These should also be considered as the protection scope of the present application.

Claims

1. A synchronous friction welding connector (1) for fixing two spaced apart plate-shaped members by friction welding, characterized in that: the synchronous friction welding connector (1) is in the shape of a cylinder, comprising a clamping section (11) and a supporting section (12); the clamping section (11) comprises a clamping part (112) and a supporting shoulder part (110), the clamping part (112) is located at the end of the clamping section (11) away from the supporting section (12), the clamping part (112) is used to connect a friction welding device, the supporting shoulder part (110) is used to limit the movement of the two plate-shaped members towards each other, the side surface of the supporting shoulder part (110) is a first welding surface (111); the outer diameter of the end of the supporting shoulder part (110) close to the supporting section (12) is larger than that of the other end; the supporting shoulder part (110) is in the shape of a truncated cone or a horn. the end surface of the supporting section (12) away from the clamping section (11) is a second welding surface (121); the first welding surface (111) and the second welding surface (121) are respectively used for friction welding fixed connection with the two plate-shaped members.

2. The synchronous frictional weldment (1) according to claim 1, characterized in that: the supporting section (12) is in the shape of a hollow cylinder, comprising a tube section (122) and an embedded section (123) along the axial direction, the wall thickness of the embedded section (123) is constant or decreases along the axial direction towards the second welding surface (121).

3. The synchronous frictional weldment (1) according to claim 2, characterized in that: the supporting section (12) further comprises a thickened section (124), the thickened section (124) is located between the tube section (122) and the embedded section (123), and the wall thickness of the thickened section (124) is greater than that of the tube section (122).

4. The synchronous frictional weldment (1) of claim 1, characterized in that: the supporting section (12) has a stepped surface (125) at the connection with the clamping section (11).

5. The synchronous frictional weldment (1) of claim 1, characterized in that: the tube wall inner surface or outer surface of the supporting section (12) is provided with a reinforcing rib (126).

6. The synchronous frictional weldment (1) of claim 1, characterized in that: the clamping part (112) is a polygonal groove or a boss.

7. The synchronous frictional weldment (1) of claim 1, characterized in that: the clamping section (11) and the supporting section (12) are integrally formed.

8. The synchronous frictional weldment (1) of claim 1, characterized by: the clamping section (11) and the supporting section (12) are sleeved with each other and fixed by friction welding.

9. An outer-rotation type synchronous friction welding double-layer cavity plate, comprising the synchronous friction welding connector (1) according to any one of claims 1-8, characterized in that: further comprising a panel (2) and a base plate (3), the panel (2) and the base plate (3) are spaced apart, and the panel (2) is provided with a mounting hole (21); the synchronous friction welding connector (1) is located between the panel (2) and the base plate (3), and the supporting shoulder part (110) limits the movement of the panel (2) towards the base plate (3); the synchronous friction welding connector (1), the panel (2) and the base plate (3) are fixed by synchronous friction welding, wherein the first welding surface (111) is friction welded and fixedly connected with the hole wall of the mounting hole (21), and the second welding surface (121) is friction welded and fixedly connected with the base plate (3).

10. The out-of-rotation type synchronous friction welding double-layered hollow plate according to claim 9, characterized in that: the panel (2), the base plate (3) or the synchronous friction welding connector (1) is made of metal, organic material or glass.

11. The out-of-rotation type synchronous friction welding double-layered hollow plate according to claim 9, characterized in that: at least one of the panel (2) and the base plate (3) is a curved panel.

12. A double-layered cavity panel assembly structure of the out-rotation synchronous friction welding, comprising the double-layered cavity panel of the out-rotation synchronous friction welding according to any one of claims 9-11, characterized in that: the cavity between the panel (2) and the base plate (3) is filled with a filling material (4).

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