Friction welding double connector and outer rotation friction welding cavity plate

Abstract

The application discloses a friction welding double connecting piece and an outer rotation friction welding cavity plate, and solves the problem of poor performance of the cavity plate caused by the lack of adjusting measures for adjusting the rigidity of the double connecting piece of the cavity plate, insufficient stability of the welding quality and other factors, and the technical scheme is as follows: the friction welding double connecting piece is a cylinder with one end closed and the other end opened, and comprises a head, a cylinder body and a convex ring; the cylinder body is in a hollow cylindrical shape; the head is located at one end of the cylinder body and closes the one end of the cylinder body, and the head is provided with a clamping part connected with a friction welding device; the convex ring is located at the other end of the cylinder body, and the convex ring extends radially from the end of the cylinder body and is perpendicular to the side wall of the cylinder body. The rigidity of the connecting piece is adjusted, the difficulty of welding in the cavity double-layer plate is solved, the area of the welding seam is increased through the convex ring, the strength of the welding seam is obviously improved, and the welding through the panel or the base plate is effectively prevented.

Description

TECHNICAL FIELD

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

[0002] The cavity plate is a structure composed of two side panels and connectors arranged in the interlayer between the panels, and a filling material such as concrete can be filled in the interlayer to form a combined structure. The panels and connectors can be metal, organic material or glass, etc. The cavity plate has the advantages of light weight, simple structure, excellent mechanical properties, and modular construction, which can effectively save design and construction costs. Such structure is widely used as a structural plate in bridges, super high-rise buildings, nuclear power plant containment, offshore platforms, etc. Even in harsh stress environments such as wings and submarine pressure hulls, this structure can be used.

[0003] When constructing the cavity plate structure, how to increase the connection strength between the two side panels and the connectors, and the internal filling body, and improve the overall structure, is the key to ensure that the components of the structure work together and maximize their respective advantages. Therefore, the key to the design of the cavity plate lies in the design of the connector and the connection method between the connector and the outer panel.

[0004] The existing connectors include single connectors and double connectors. The single connector is fixedly connected with only one side panel, and the single connector is easy to manufacture, but has poor shear resistance and tensile resistance. The double connector is a connector that is fixedly connected with both side panels, and has significantly better shear resistance and tensile resistance than the single connector. However, the double connector often involves welding inside the cavity, which is difficult to weld and difficult to ensure the welding quality for small cavity plates with small overall thickness. In addition, the existing connectors such as pegs and bolts have a single structure, and it is difficult for the connector to adjust its stiffness to match the stiffness of the panel. Inconsistent stiffness often causes panel cracking or insufficient connector stiffness and buckling.

[0005] Therefore, in the design of the connector, on the one hand, a high shear connection key that has connection constraints for both side panels needs to be conceived, and small cavity double-sided connection needs to be achieved to minimize the probability of performance degradation of the combined structure caused by interface slip after the connection structure is constructed, and to move as close as possible to a complete combined structure. On the other hand, the connector stiffness also needs to have certain adjustment measures to avoid too few connection keys, too much stiffness, or too much stress concentration, so that the stress of each connection key can be as close as possible or balanced in the stress redistribution process of coordinated deformation. At the same time, due to the large number of connectors, a large number of welding or connections are required, and how to balance the cost, efficiency and quality stability of a large number of connection keys also becomes a problem in the design of the double steel plate structure. The present application is developed to solve this problem. SUMMARY

[0006] The application aims to solve the problem of poor performance of cavity plates caused by lack of adjustment measures for adjusting the rigidity of the double-sided connection connector of the cavity plate in the prior art, and insufficient stability of the welding quality.

[0007] To achieve the above-mentioned application purposes, the application adopts the following technical solutions:

[0008] In the first aspect, the application provides a friction welding double connector, which comprises a barrel, a head and a convex ring.

[0009] The barrel is a hollow cylinder.

[0010] The head is located at one end of the barrel and closes the end of the barrel, and the head has a clamping part and a limiting part.

[0011] The convex ring is located at the other end of the barrel, and the convex ring extends inward and / or outward from the end of the barrel in a direction perpendicular to the side wall of the barrel.

[0012] As a preferred embodiment, the outer diameter of the limiting part changes along the axis direction of the double connector. When the limiting part is friction welded, it is matched with the through hole of the panel to limit the relative movement of the panel and the base plate, can bear the pressing force of friction welding, transmits the force acting on the panel to the other end, makes the two ends of the double connector press at the same time, synchronously welds, ensures the consistency of the welding conditions, and can be freely rotated, forms the condition of extruding the plastic melt out of the interface, and forms a dense welding interface.

[0013] As a preferred embodiment, the limiting part has a conical frustum shape, a horn shape or a multi-layer cylindrical shape with different diameters. The conical frustum shape, the horn shape or the multi-layer cylindrical shape of the limiting part is simple to manufacture, can not only limit the position, but also significantly increase the welding expansion area, increase the welding interface of the friction welding, and make the welding performance more stable.

[0014] As a preferred embodiment, the clamping part is a boss. After the cavity plate is formed, the top surface of the boss exceeds the outer surface of the panel, and the boss can be used as an additional connection and anchoring of the external application surface.

[0015] As a preferred embodiment, the clamping part is a groove located at the end face of the head. The groove-shaped clamping part can not only be used as a connection of the external friction welding device, but also can form a basically flush application surface after the cavity plate is formed, the surface is smoother, and is suitable for occasions requiring smooth and flat application surfaces, such as bridge decks and steel platforms.

[0016] In a second aspect, the application provides an outer rotation friction welding cavity plate, comprising a panel, a base plate, and the friction welding double connector described above, the panel and the base plate having a cavity therebetween, the friction welding double connector being located in the cavity, and a plurality of friction welding double connectors being arranged in parallel and at intervals;

[0017] A plurality of through holes are formed in the panel, the limiting portions cooperate with the through holes and limit the panel and the base plate from approaching each other, and the clamping portions are used for the external friction welding equipment to clamp the double connector through the through holes.

[0018] The friction welding double connector is connected with the panel and the base plate through friction welding, wherein the head is fixedly connected with the panel, and the convex ring is fixedly connected with the base plate.

[0019] Preferably, the thickness of the panel is t1, the thickness of the edge of the through hole is t2, and the thickness of the limiting portion is t3, and t3>t2>t1. After welding, the head fills the through hole formed in the panel. Since friction welding is used, the welded joint of the friction welding can achieve the performance of the panel base material. In addition, the thickness of the hole after welding is greater than the rest of the panel, so the strength of this position is even greater than the strength of the panel base material.

[0020] Preferably, the cavity plate is made of metal, organic material or glass. Since friction welding can be used for metal materials and various non-metal materials such as organic materials and glass, the application of the outer rotation friction welding cavity plate of the embodiment of the application is more widely used.

[0021] Preferably, the cavity between the panel and the base plate has a filler. After injecting the filler, a combined structure of double connections can be formed, which can be used for various applications such as combined structure bridge decks and shear walls.

[0022] Preferably, the panel or the base plate is a curved panel. The curved panel can be applied to a wider range of applications, such as roofs.

[0023] Compared with the prior art, the above technical solution has the following beneficial effects:

[0024] 1. The friction welding double connector of the embodiment of the application can adjust the stiffness of the connector itself. From the perspective of shear resistance and stability, the thicker the connector, the better the shear resistance. However, too thick will cause the stiffness of the connector itself to be too large, and the welding position of the panel or the base plate, causing the stiffness of the two to be mismatched, causing the panel to fatigue and crack. Since the connector is a hollow cylinder, the stiffness of the connector can be adjusted by adjusting the wall thickness of the connector. While increasing the outer diameter of the connector to obtain high shear resistance, the stiffness of the connector is controlled to match the stiffness of the panel and the connector.

[0025] 2, The friction welding double connecting piece of the application solves the internal welding problem in the manufacture of the cavity plate. When welding, the friction welding equipment drives the friction welding double connecting piece to rotate through the clamping part of the clamp head passing through the through hole of the panel. At the same time, through the matching of the limiting part and the through hole, the limiting part supports the panel. The friction welding equipment only needs to press the panel from the outside, so as to press the upper and lower two surfaces at the same time, realize the synchronous friction welding of the connecting piece and the panel and the base plate. Although the through hole needs to be opened in the panel during welding, the side wall of the head fills the original through hole after welding by friction welding connection. Because the welding strength of friction welding is large, the strength of the welding point is also greater than or equal to the strength of the adjacent panel base material, so as to solve the difficult problem of internal welding of the cavity double-layer plate, especially suitable for the cavity double-layer plate structure with small height, which is difficult for the hand and tool to enter the inside for welding.

[0026] The small cavity double-layer plate has been a bottleneck problem in the manufacturing field. The application creatively adopts the synchronous welding mode at both ends, which not only improves the manufacturing efficiency and reduces the process difference of welding at both ends, but also makes the welding process parameters consistent in stability from the fundamental principle.

[0027] 3, The application sets a convex ring at the end of the connecting piece. No matter the convex ring extends inward or outward, it can be attached and welded with the panel or the bottom plate, which can change the traditional T-shaped welding into the welding mode of surface-to-surface attachment, that is, increase the cross-sectional area of the welding seam, thereby significantly improving the welding seam strength and its fatigue resistance. At the same time, the convex ring thickens the end, which can improve the stability during welding. In addition, the setting of the convex ring can reduce the embedding depth of the end, effectively preventing the welding of the outer plate due to the excessive embedding depth of the friction welding when the outer plate is relatively thin. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the friction welding double connecting piece in embodiment 1 of the application;

[0029] Figure 2 It is a schematic diagram of the longitudinal section of the friction welding double connecting piece in embodiment 1 of the application, wherein the convex ring extends on both sides;

[0030] Figure 3 It is a partial enlarged view of Figure 2 ;

[0031] Figure 4 It is a schematic diagram of the longitudinal section of the friction welding double connecting piece in embodiment 2 of the application, wherein the convex ring extends outward;

[0032] Figure 5 It is a partial enlarged view of Figure 4 ;

[0033] Figure 6Fig. 3 is a perspective view of a friction-welded double connector with another end cover structure in Embodiment 3 of the present application;

[0034] Figure 7 Fig. 4 is a longitudinal sectional view of the friction-welded double connector in Embodiment 3 of the present application;

[0035] Figure 8 Fig. 5 is a partial enlarged view of Figure 7 ;

[0036] Figure 9 Fig. 6 is a perspective view of the limiting part in Embodiment 1 of the present application, which is composed of multiple layers of cylinders with different diameters;

[0037] Figure 10 Fig. 7 is a perspective view of the limiting part in Embodiment 1 of the present application, which is trumpet-shaped;

[0038] Figure 11 Fig. 8 is a plan view of a friction-welded double connector with an outer-rotation cavity plate in Embodiment 4 of the present application;

[0039] Figure 12 Fig. 9 is a partial enlarged view of Figure 11 ;

[0040] Figure 13 Fig. 10 is a schematic view of the cavity plate with a filler in the cavity in Embodiment 4 of the present application.

[0041] Reference signs: 1、 Friction-welded double connector; 11, barrel; 12, end cover; 13, convex ring; 121, clamping part; 122, limiting part; 2, panel; 21, through hole; 3, base plate; 4, filler. DETAILED DESCRIPTION

[0042] The present application will be further described below with reference to the drawings. It should be noted that in the description of the present 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 used for the purpose of facilitating the description of the present 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 a limitation on the present application.

[0043] Embodiment 1:

[0044] As Figures 1-3The application discloses a friction welding double connector for a cavity plate, which is a cylinder with one end closed and one end open, and comprises a cylinder body 11, a head 12 and a convex ring 13. The cylinder body 11 is a hollow cylinder, the head 12 is arranged at one end of the cylinder body 11 and closes the one end of the cylinder body 11, and the head 12 is provided with a clamping part 121 connected with a friction welding device. The head 12 further comprises a limiting part 122, the outer diameter of the limiting part 122 changes along the axial direction, as shown in Figure 2 , the limiting part 122 is in the shape of a truncated cone, as shown in Figure 9 , the limiting part 12 is a multi-layer cylinder with different diameters, as shown in Figure 11 , the limiting part 12 is in the shape of a horn. The convex ring 13 is arranged at the other end of the cylinder body 11, and the convex ring 13 extends to both sides along the radial direction of the side wall of the cylinder body 11 perpendicularly to the end of the cylinder body 11.

[0045] The friction welding double connector for the cavity plate provided by the application can realize the adjustment of the rigidity of the connector itself, because the connector is in the shape of a hollow cylinder, the rigidity of the connector can be adjusted by adjusting the wall thickness of the connector, the rigidity of the connector can be controlled while the high shear performance of the connector is obtained by increasing the outer diameter of the connector, and the rigidity of the connector can be matched with the rigidity of the panel.

[0046] Embodiment 2

[0047] As shown in Figure 4 , 5 , it is a schematic view of another friction welding double connector 1, and the difference from the embodiment 1 is that the convex ring 13 is an outwardly extending flange, which extends to the outside along the radial direction of the end of the cylinder body 11. Because the end is easy to deform when being heated and pressed, the convex ring 13 can guarantee the stability of the cylinder body when being initially rotated, reduce the occurrence of swing or jump, and reduce the embedding depth of the connector in the outer panel when being welded, especially when the thickness of the outer panel is relatively small, the welding of the thin panel can be effectively prevented, and the cross-sectional area of the welding seam can be increased.

[0048] Embodiment 3

[0049] As shown in Figures 6-8The diagram shows another friction-welded double connector 1. The difference from Embodiment 1 is that the smaller end of the end cap 12 faces outwards, and the outer diameter of the cylinder 11 is larger than the outer diameter of the larger end of the end cap 12. The frustoconical or flared end cap 12 not only presses against the panel during friction welding, but the clamping force of the friction weld is also transmitted from the end cap 12 to the connector. Furthermore, the frustoconical or flared end cap 12 has beveled sides, which can form a beveled extrusion weld during friction welding, helping to reduce shrinkage tensile stress in the weld area and improve the weld connection strength.

[0050] Example 4:

[0051] like Figures 11-13 The diagram shows an external friction-welded cavity plate, comprising a panel 2, a substrate 3, and multiple friction-welded double connectors 1 as described in the above embodiments. The panel 2 and substrate 3 can be flat or curved panels for wider applications, such as bridge decks, floor slabs, or roof structures. The panel 2 and substrate 3 are spaced apart, with a cavity between them. The panel 2 and substrate 3 are commonly parallel to each other, such as in floor slabs and walls, but they can also be inclined to each other, such as in the cantilever section of a bridge. The friction-welded double connector 1 is located in the cavity, and multiple friction-welded double connectors 1 are arranged parallel to each other and spaced apart. Multiple through holes 21 are opened on the panel 2. Due to the change in the outer diameter of the limiting part 122, the shape of the through hole 21 matches the limiting part 122. The limiting part 122 can serve as a support for the panel 2 and prevent the panel 2 and the substrate 3 from getting close to each other. During welding, the friction welding equipment only needs to press the panel 2 on the outside to press the upper and lower surfaces at the same time, so as to realize the friction-welded double connector 1 and the panel 2 and the substrate 3 are synchronously friction-welded and fixedly connected. The end cap 12 is fixedly connected to the panel 2, and the convex ring 13 is fixedly connected to the substrate 3.

[0052] In this embodiment of the external friction-welded cavity plate, the double connector 1 is connected to the panel 2 and the substrate 3 by friction welding, and a cap is provided at one end. During welding, the friction welding equipment clamps the clamping part at the end of the cap, driving the connector to rotate, thereby realizing synchronous friction welding of the connector with the panel and the substrate. Although a through hole 21 must be opened in the panel 2 during welding, after welding, the side wall of the cap and the side wall of the through hole 21 are connected by friction welding, and the cap 12 can fill the original through hole. Due to the high strength of the friction welded joint, its performance after welding is not much different from that of the steel plate without the hole. Figure 10 As shown, the thickness of panel 2 is t1, the thickness of the edge of through hole 21 is t2, and the thickness of end cap 12 is t3, then t3 > t2 > t1. The thickness of the end cap is greater than the thickness of the panel, so the strength of its weld joint is also greater than or equal to the strength of the adjacent panel. This application solves the difficult problem of welding inside a cavity double-layer plate. It is especially suitable for cavity double-layer plate structures with small heights where it is difficult for hands and tools to enter the interior for welding.

[0053] The small cavity double-layer plate has been a bottleneck problem in the manufacturing field, and the application creatively adopts the synchronous welding mode at both ends, which not only improves the manufacturing efficiency and reduces the process difference of the welding at both ends, but also makes the welding process parameters consistent in stability from the fundamental principle. The specific implementation approach is that the upsetting force of the friction welding is first applied to the face plate 2, the face plate is pressed tightly to the double connecting piece 1, and then the force is transmitted to the cylinder body 11 through the limiting part 122 of the end cover 12, then to the convex ring 13, and then to the base plate 3. In the above force transmission path, the force acting on the welding surface of the side surface of the end cover 12 and the welding surface of the convex ring 13 is equal, the rotating speed of the clamping part 121 is equal, and the starting and stopping time of the friction welding equipment is equal, which creates the most basic stable elements of the friction welding, thereby forming the double-layer cavity plate product with high efficiency, stability and low cost.

[0054] Further, the traditional welding of the pipe and the plate perpendicular to each other is through the welding of the end surface of the pipe and the face plate to form a "T" shape welding in the thickness direction of the pipe wall and the plate. Due to the limited size of the pipe wall thickness, the cross-sectional area of the weld is limited, and if the weld is too large, the side wall will be welded through, causing welding defects. If the pipe wall is increased, the material utilization rate will decrease. The application sets the convex ring 13 at the end of the connecting piece 1, which extends inward or outward, and is attached and welded with the face plate 1 or the bottom plate 2, thereby changing the traditional T-shaped welding into a face-to-face welding mode, increasing the area of the weld, and significantly improving the strength of the weld, thereby improving the fatigue resistance, and further adjusting the weld cross section and the offset position of the weld according to the extension length and the folding angle of the convex ring 13, and the designability is stronger.

[0055] As shown in Figure 2 , the clamping part 121 is in the form of a boss or a groove. The clamping part in the form of a boss has the outer surface of the boss top surface exceeding the outer surface of the face plate 2 of the cavity plate, and the clamping part can be used to connect other components.

[0056] As shown in Figure 11 , the clamping part 121 is in the form of a groove, and the end surface of the end cover 12 and the outer surface of the face plate 2 are basically flush after welding, which is more suitable for application occasions requiring flat and smooth surfaces.

[0057] The cavity plate is made of metal, organic material or glass. Since the friction welding can be used for metal materials and various non-metal materials such as organic materials and glass, the outer rotation friction welding cavity plate of the application can be applied in a wider range of applications.

[0058] There is a filler 4 in the cavity between the face plate 2 and the base plate 3. After injecting the filler, a combined structure with double connections is formed, which can be used for various applications such as combined structure bridge decks and shear walls.

[0059] The above are preferred embodiments of the present application, and for those skilled in the art, without departing from the principles of the present application, can make some variations and improvements, which should also be considered as the protection scope of the present application.

Claims

1. A friction welding double connector (1), characterized in that: it comprises a barrel (11), a head (12) and a convex ring (13); the barrel (11) is a hollow cylinder; the head (12) is located at one end of the barrel (11) and closes the end of the barrel (11), the head (12) has a clamping part (121) and a limiting part (122), the outer diameter of the limiting part (122) changes along the axial direction of the friction welding double connector (1); the convex ring (13) is located at the other end of the barrel (11), the convex ring (13) extends inward and / or outward from the end of the barrel (11) in a direction perpendicular to the side wall of the barrel (11).

2. Friction welding double connection (1) according to claim 1, characterized in that: The limiting part (122) is in the shape of a truncated cone, a horn or a plurality of layers of cylinders with different diameters.

3. The friction-welded dual connector (1) according to claim 1, characterized in that: The clamping part (121) is a boss.

4. The friction-welded dual connector (1) of claim 1, characterized in that: The clamping part (121) is a groove on the end face of the head (12).

5. An outer rotation friction welding cavity plate, comprising a panel (2), a base plate (3), and the friction welding double connector (1) of any one of claims 1-4, characterized in that: the panel (2) and the base plate (3) have a cavity therebetween, the friction welding double connector (1) is located in the cavity, and a plurality of friction welding double connectors (1) are arranged parallel to and spaced from each other; a plurality of through holes (21) are formed in the panel (2), the limiting part (122) cooperates with the through holes (21) and limits the panel (2) and the base plate (3) from approaching each other, and the clamping part (121) is used for the external friction welding equipment to pass through the through holes (21) to clamp the double connector (1); the friction welding double connector (1) is connected with the panel (2) and the base plate (3) by friction welding, wherein the head (12) is fixedly connected with the panel (2), and the convex ring (13) is fixedly connected with the base plate (3).

6. The outer rotary friction welding cavity plate of claim 5, wherein: The thickness of the panel (2) is t1, the thickness of the edge of the through hole (21) is t2, and the thickness of the limiting part (122) is t3, then t3>t2>t1.

7. The outer rotary friction welding cavity plate of claim 5, wherein: The cavity plate is made of metal or organic material.

8. The outer rotary friction welding cavity plate of claim 5, wherein: The cavity between the panel (2) and the base plate (3) has a filler (4).

9. The outer rotary friction welding cavity plate of claim 5, wherein: The panel (2) or the base plate (3) is a curved panel.

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