A double-layer metal cavity plate with internal welded openings and its combined structure

Abstract

This patent relates to a double-layer hollow metal plate and its combined structure, particularly to a double-layer hollow metal plate with inwardly welded openings and its combined structure, comprising a proximal metal plate (1), multiple inwardly welded components (2), and a distal metal plate (3). The distance between the proximal metal plate (1) and the distal metal plate (3) is greater than 20 mm and less than 150 mm. The proximal metal plate (1) has multiple through holes (11). One end of each inwardly welded component (2) passes through a through hole (11) and is welded to the distal metal plate (3). The inwardly welded component (2) is also welded to the proximal metal plate (1). This patent transforms the disadvantages of small cavities into advantages. The method used is simple and practical. By opening holes in the proximal metal plate as positioning points for the connectors, the difficulty of matching or precisely fitting multiple connectors is reduced. The cost is low and the practicality is high.

Description

Technical Field

[0001] This patent relates to a double-layer hollow metal plate and its combined structure, and more particularly to a double-layer hollow metal plate with an internal welded opening and its combined structure. Background Technology

[0002] There is almost no relevant information on ultra-thin double-layer metal plates with small cavities in the existing technology. If the internal structure of the small cavity plate is double-constrained, its structural stability and connectivity can be greatly improved. However, due to the small space, it is difficult for the intermediate connectors to enter manually or automatically using traditional methods, so connection operations cannot be performed. This has always been a pain point that is difficult to solve in the industry. Summary of the Invention

[0003] This patent addresses the challenge of bimetallic plate connectors in existing technologies, particularly the double-constraint connection between the near-end and far-end metal plates within the cavity. Due to the small size of the connection points and the cavity itself, this has been a persistent pain point in the industry. The patent provides a bimetallic cavity plate and its combined structure that utilizes the small cavity and close proximity by creating a hole in one steel plate and extending the inner connector into the opposite side for welding to the far-end metal plate. Because of the limited space, the welding process and quality are easily observed and controlled.

[0004] To solve the above-mentioned technical problems, this patent provides the following technical solution:

[0005] A double-layer metal cavity plate with inward welded openings includes a near-end metal plate, multiple inward welded components, and a far-end metal plate. The distance between the near-end metal plate and the far-end metal plate is greater than 20 mm and less than 150 mm. Multiple through holes are opened on the near-end metal plate. One end of the inward welded component passes through the through hole, and the other end is welded to the far-end metal plate. The inward welded component is also welded to the near-end metal plate.

[0006] Preferably, the distance between the near-end metal plate and the far-end metal plate is 30mm. This narrow distance prevents personnel or welding equipment from entering between the near-end and far-end metal plates for welding. The welding of the inward-extending weldment to the far-end metal plate is either friction welding or fusion welding. When the welding of the inward-extending weldment to the far-end metal plate is friction welding, the connection between the inward-extending weldment and the near-end metal plate is synchronous friction welding; when the welding of the inward-extending weldment to the far-end metal plate is fusion welding, the connection between the inward-extending weldment and the near-end metal plate is delayed fusion welding.

[0007] Preferably, the inner welded component is a hollow rod, with its upper outer surface flush with or higher than the outer surface of the near-end metal plate. This inner welded component is a hollow rod of a suitable diameter. In hollow structures, a mismatch often arises between shear resistance and rod stiffness. Sometimes, scenarios require maximum shear resistance, necessitating a large cross-section for the inner welded component, while also requiring a certain degree of deformation or flexibility to reduce stress at the connection points due to excessive stiffness. Therefore, this patented inner welded component, while ensuring welding of both near-end and far-end metal plates, utilizes a hollow tube cross-section. The hollow tube design of the inner welded component guarantees the welding strength of the connector and allows for the adjustment of diameter and wall thickness to achieve suitable flexibility, meeting structural requirements and resolving the common industry problem of mismatch between shear resistance at connector nodes and rod flexibility. Meanwhile, the inner welded component is friction-welded to the distal metal plate. When the hollow inner member rotates, its outer edge has the highest linear velocity, resulting in the highest friction efficiency with the distal metal plate and a superior welding effect compared to the solid member. Solid members, due to their lower linear velocity in the middle during rotation, require more energy to weld.

[0008] Secondly, the slightly higher or outwardly protruding inwardly welded components utilize the height configuration of the connecting parts to form external connection points for the bimetallic plates, such as for external decoration or covering, without affecting the strength of the near-end metal plate. Simultaneously, since the connecting part is a critical structural point, its strength should not be weaker than other parts of the near-end metal plate. Thirdly, appropriate outward protrusion facilitates clamping and operation. When this bimetallic plate is used on bridge decks, the protruding components also serve as anchor points for connecting the bridge deck pavement layer or for anti-slip steel bridge deck surfaces.

[0009] Preferably, the inner extension welded component is a solid rod. The solid rod is simultaneously welded to the distal and proximal metal plates using rotary friction welding.

[0010] Preferably, the inner welded component is a solid rod, and its height is greater than or equal to the outer surface height of the near-end metal plate. Therefore, the inner welded component is flush with or slightly higher than the near-end metal plate. This facilitates welding to the near-end metal plate, and because the near-end metal plate has an opening, its continuity and structural strength are slightly weaker than the steel plate. When the opening is subjected to force, the protruding inner welded component bears the force first, protecting the opening and improving the overall structural performance of the double steel plate.

[0011] Preferably, the materials of the near-end metal plate and the far-end metal plate are one or a combination of steel, aluminum alloy, and titanium alloy. The connection point is a sensitive and critical area of ​​the double-layer metal cavity plate, and the material used for the inner welded parts of the connection point is relatively small. However, this critical area places high demands on the performance of the structural design. When this patent uses friction welding for connection, the use of dissimilar metals with higher performance but in smaller quantities is more conducive to leveraging the different properties and functions of the materials. Due to the extensive welding space for dissimilar metals using friction welding, it is more conducive to constructing a metal cavity plate with better performance and lower cost.

[0012] Preferably, the extended weldment has a tapered ramp at the opening of the near-end metal plate. The tapered ramp connects to the near-end metal plate, and the extended weldment passes through the near-end metal plate to contact the far-end metal plate. It rotates via a rotating end outside the near-end metal plate and is simultaneously welded to the near-end and far-end metal plates using friction welding. The diameter of the tapered ramp gradually increases from the near-end to the far-end metal plate, and the tapered ramp is connected to the near-end metal plate by friction welding. The lower end of the tapered ramp serves as a support platform, the diameter of which is larger than the opening diameter of the near-end metal plate. This structure realizes a practical product for welding within a small cavity, especially for simultaneous welding at both ends of a component within a small cavity. The support platform of the extended weldment ensures that the pressure of external friction welding is applied to the near-end metal plate. The support platform utilizes the principle of equal action and reaction forces, ensuring equal friction welding pressure on the near-end and far-end metal plates, guaranteeing similar process parameters and mechanistic stability for welding at both ends. Since the pressure is applied to the outside of the panel, the main parameters such as pressure, speed, and time of the synchronous friction welding at both ends become intuitive and controllable, ensuring the structural rationality and quality of the synchronous friction welding at both ends.

[0013] The purpose of setting up the inclined or conical surface is mainly to enable the welding interface to automatically fit together by approaching each other during the stroke, reducing the need for precision manufacturing processes. Furthermore, the frictional rotation further enhances the fit, and the inclined surface further tightens the fit, fully squeezing out welding oxides, air, and impurities, increasing the compressive stress on the welding interface, thereby reducing fatigue mainly caused by tensile stress.

[0014] Preferably, the edges of the through holes on the near-end metal plate are flanged. The flanged reinforcement and cold-work densification at the opening position of the near-end metal plate ensure that the weld cross-section between the protruding weldment and the near-end metal plate is greater than the plate thickness. The cold-work densification further guarantees the quality of the weld interface. When the near-end metal plate bears the load of external wheels or other driving functions, the thickened protrusion can also serve as an anti-slip surface, thus avoiding the expensive cost of using patterned steel plates for the surface near-end metal plate.

[0015] Preferably, the internal weldment is a stud. After the stud is welded to the distal metal plate using a stud-making machine, the stud head is welded to the through hole on the proximal metal plate. The stud is first inserted into the hole and welded to the distal metal plate, and then the stud head is welded to the proximal metal plate with a delay. A ceramic sleeve is fitted onto the end of the stud. When the stud is welded to the distal metal plate, the ceramic sleeve provides protection and ensures the weld quality.

[0016] A double-layer metal cavity plate composite structure includes the aforementioned double-layer metal cavity plates with inwardly welded openings, with filler material filling the space between the near-end and far-end metal plates. By pouring concrete inside the double-layer metal cavity plates, the entire double-layer metal cavity plate composite structure becomes a steel-clad concrete structure. Protected by the external steel, the internal concrete is not easily damaged, combining the shear strength of steel with the compressive strength of concrete. Therefore, the double-layer metal cavity plate composite structure has significant practical application value.

[0017] One edge of the near-end metal plate is turned down to form an L-shaped flange. The cross-section of the near-end metal plate is L-shaped. The L-shaped flange of the near-end metal plate not only strengthens the direct connection between the near-end metal plate and the far-end metal plate, but also facilitates the splicing of the near-end metal plate with adjacent near-end metal plates. At the same time, when the cavity plate is filled with filler, the flange becomes a cavity compartment plate, separating the filler into blocks, which also facilitates the pouring of concrete.

[0018] Preferably, venting and grouting holes are provided on either the near-end or far-end metal plate. When concrete is poured between the near-end and far-end metal plates, the air between them is expelled through the venting and grouting holes, ensuring the compactness of the concrete poured between them.

[0019] Preferably, the filler is concrete, and the concrete filler is filled by injection molding.

[0020] This patent transforms the disadvantages of small cavities into advantages. The method used is simple and practical. By opening holes in the near-end metal plate as positioning for the connectors, welding can be performed only according to the pre-drilled hole positions during operation. There is no need for precise positioning or complex operations such as hole alignment, which reduces the difficulty of hole alignment or fine fitting of multiple connectors. It is low in cost and highly practical. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the double-layer metal cavity plate with internal welding and opening in this patent.

[0022] Figure 2 This is a schematic diagram of the double-layer metal cavity plate combination structure of this patent.

[0023] Figure 3 This is a schematic diagram of the structure of Embodiment 1 of this patent.

[0024] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this patent.

[0025] Among them, 1—near end metal plate, 2—inner extension welded part, 3—far end metal plate, 4—ceramic sleeve, 11—through hole, 12—flanged edge, 21—conical bevel, 22—support platform. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 To be continued Figure 4 The present patent will be further described in detail with reference to specific embodiments: Example 1

[0027] A double-layer metal cavity plate with internal welded openings, such as Figure 1 , 2 As shown in Figure 3, the device includes a near-end metal plate 1, multiple inner-extended welded parts 2, and a far-end metal plate 3. The distance between the near-end metal plate 1 and the far-end metal plate 3 is greater than 20 mm and less than 150 mm. Multiple through holes 11 are opened on the near-end metal plate 1. One end of the inner-extended welded part 2 passes through the through hole 11, and the other end is welded to the far-end metal plate 3. The inner-extended welded part 2 is welded to the near-end metal plate 1.

[0028] The distance between the proximal metal plate 1 and the distal metal plate 3 is 30mm. This narrow distance prevents personnel or welding equipment from entering between the two plates for welding. The welding of the extended weldment 2 to the distal metal plate 3 is either friction welding or fusion welding. When the welding of the extended weldment 2 to the distal metal plate 3 is friction welding, the connection between the extended weldment 2 and the proximal metal plate 1 is synchronous friction welding; when the welding of the extended weldment 2 to the distal metal plate 3 is fusion welding, the connection between the extended weldment 2 and the proximal metal plate 1 is delayed fusion welding.

[0029] The inner welded component 2 is a solid rod, which is simultaneously welded to the distal and proximal metal plates using rotary friction welding. The height of the inner welded component 2 is greater than or equal to the outer surface height of the proximal metal plate 1. Therefore, the inner welded component 2 is flush with or slightly higher than the proximal metal plate 1. This facilitates welding to the proximal metal plate 1. Furthermore, because the proximal metal plate 1 has an opening, its continuity and structural strength are slightly weaker than the steel plate. When the opening is subjected to stress, the protruding inner welded component 2 bears the stress first, thus protecting the opening and improving the overall structural performance of the double steel plates.

[0030] The materials of the near-end metal plate 1 and the far-end metal plate 3 are steel.

[0031] The inner weldment 2 has a tapered bevel 21 at the opening of the near-end metal plate 1. The tapered bevel 21 connects to the near-end metal plate 1, and the inner weldment 2 passes through the near-end metal plate 1 and contacts the far-end metal plate 3. It rotates through the rotating end outside the near-end metal plate 1 and is simultaneously welded to the near-end metal plate 1 and the far-end metal plate 3 using friction welding. The diameter of the tapered bevel 21 gradually increases from the near-end metal plate 1 to the far-end metal plate 3, and the tapered bevel 21 is connected to the near-end metal plate 1 by friction welding. The lower end of the tapered bevel 21 is a support platform 22, and the diameter of the support platform 22 is larger than the opening diameter of the near-end metal plate 1. This structure realizes a practical product for welding within a small cavity, especially in the simultaneous welding of both ends of the component within the small cavity. Utilizing the support platform 22 of the inner weldment 2, the external friction welding pressure is applied to the near-end metal plate. The support platform is designed based on the principle of equal action and reaction forces, ensuring equal friction welding pressure on the near-end and far-end metal plates, guaranteeing the stability of the welding process parameters and mechanisms used at both ends. Because the pressure is applied to the outside of the panel, the key parameters such as pressure, rotation speed, and time of this simultaneous friction welding at both ends become intuitively controllable, ensuring the structural rationality and quality of the simultaneous friction welding at both ends.

[0032] The through-hole 11 on the near-end metal plate 1 has a flange 12 at its edge. The flange 12 thickens and strengthens the opening of the near-end metal plate 1 through cold working, ensuring that the weld cross-section between the inner weldment and the near-end metal plate is greater than the plate thickness. The cold working strengthening also further ensures the quality of the weld interface. When the near-end metal plate 1 bears the driving function of external wheels, the thickened outward protrusion can also serve as an anti-slip surface, thus avoiding the expensive problem of using patterned steel plates for the surface near-end metal plate 1.

[0033] A double-layer metal cavity plate composite structure includes the aforementioned double-layer metal cavity plates with inwardly welded openings, and filler material is used to fill the space between the near-end metal plate 1 and the far-end metal plate 3. By pouring concrete inside the double-layer metal cavity plates, the entire double-layer metal cavity plate composite structure becomes a steel-clad concrete structure. The outer steel protects the inner concrete from damage, combining the shear strength of steel with the compressive strength of concrete. Therefore, the double-layer metal cavity plate composite structure has significant practical application value.

[0034] One edge of the proximal metal plate 1 is turned down to form an L-shaped flange. The cross-section of the proximal metal plate 1 is L-shaped. The L-shaped flange of the proximal metal plate 1 not only strengthens the direct connection between the proximal metal plate and the distal metal plate, but also facilitates the splicing of the proximal metal plate with adjacent proximal metal plates. At the same time, when the cavity plate is filled with filler, the flange becomes a cavity compartment plate, separating the filler into blocks, which also facilitates the pouring of concrete.

[0035] Vent and grout discharge holes are provided on either the near-end metal plate 1 or the far-end metal plate 3. When concrete is poured between the near-end metal plate 1 and the far-end metal plate 3, air between them is expelled through the vent and grout discharge holes, ensuring the compactness of the poured concrete. The filler is concrete, which is filled using a pressure injection method. For filling closed cavities, especially small cavities, the pressure injection method requires careful consideration of potential air pockets or dead zones. The vent and grout discharge holes address these issues. These holes are typically located at the highest point or in easily observable locations, spaced at regular intervals.

[0036] Example 2

[0037] like Figure 1 , 2 As shown in Figure 3, the difference between this embodiment and Embodiment 1 is that the distance between the near-end metal plate 1 and the far-end metal plate 3 is 80mm.

[0038] The inner welded component 2 is a hollow rod. The upper outer surface of the inner welded component 2 is flush with or higher than the outer surface of the near-end metal plate 1. The welding of the inner welded component 2 to the far-end metal plate 3 is friction welding, and the connection between the inner welded component 2 and the near-end metal plate 1 is synchronous friction welding.

[0039] The extended welded component 2 is a hollow rod with a reasonable diameter. In hollow structures, a mismatch often arises between shear resistance and rod stiffness. Sometimes, scenarios require maximum shear resistance, meaning the extended welded component 2 needs a large cross-section, but the rod also needs a certain degree of deformation or flexibility to reduce the stress on the connection points caused by excessive stiffness. Therefore, the extended welded component 2 of this patent, while ensuring welding of both the near and far metal plates, uses a hollow tube cross-section. This ensures the welding strength of the connector while allowing for the adjustment of diameter and wall thickness to achieve suitable flexibility, meeting structural requirements and solving the common problem in the industry of mismatch between shear resistance at connector nodes and rod flexibility. Furthermore, the extended welded component 2 is friction-welded to the far metal plate 3. When the hollow rod rotates, its outer edge has the highest linear velocity, resulting in the highest friction efficiency with the far metal plate 3, leading to a superior welding effect compared to solid rods. Solid rods, due to their lower linear velocity in the middle during rotation, require more energy for welding.

[0040] A double-layer metal cavity plate composite structure includes the aforementioned double-layer metal cavity plates with inwardly welded openings, and filler material is used to fill the space between the near-end metal plate 1 and the far-end metal plate 3. By pouring concrete inside the double-layer metal cavity plates, the entire double-layer metal cavity plate composite structure becomes a steel-clad concrete structure. The outer steel protects the inner concrete from damage, combining the shear strength of steel with the compressive strength of concrete. Therefore, the double-layer metal cavity plate composite structure has significant practical application value.

[0041] The double-constraint connectors of the double-layer hollow plate are, after all, a lattice-like connection. After adding concrete to form a composite bimetallic plate, a reinforced structural plate with better performance is formed. The near-end metal plate or the far-end metal plate, which contributes more to the moment of inertia, is far away from the neutral layer, resulting in a square-order effect of thickness. The infill near the neutral layer is low-strength concrete or other filling materials, which not only exerts the shear resistance of the hollow plate in any direction, but also has low cost, forming the best structural combination.

[0042] Example 3

[0043] like Figure 1 , 2 As shown in Figure 4, the difference between this embodiment and Embodiment 1 is that the distance between the near-end metal plate 1 and the far-end metal plate 3 is 100mm. The inner welded component 2 is a stud. After the stud is welded to the far-end metal plate 3 using a stud welding machine, the stud head is welded to the through hole 11 on the near-end metal plate 1. Using a stud as a double-constraint connector is more beneficial for operations in complex conditions such as high-altitude work. The stud is first inserted into the hole and welded to the far-end metal plate, and then the stud head is welded to the near-end metal plate with a delay. A ceramic sleeve 4 is sleeved on the end of the stud. When the stud is welded to the far-end metal plate 3, the ceramic sleeve 4 can play a protective role and ensure the welding quality.

[0044] In summary, the above description is only a preferred embodiment of this patent. All equivalent changes and modifications made within the scope of this patent application shall be covered by this patent.

Claims

1. A double-layer metal cavity plate with inwardly welded openings, comprising a near-end metal plate (1), multiple inwardly welded components (2), and a far-end metal plate (3), characterized in that: The distance between the proximal metal plate (1) and the distal metal plate (3) is greater than 20 mm and less than 150 mm, and this distance prevents a person or welding equipment from entering between them to perform welding operations. The proximal metal plate (1) has multiple through holes (11), one end of the inner weldment (2) passes through the through hole (11), and the inner weldment (2) is welded to the distal metal plate (3) and the proximal metal plate (1). The inner weldment (2) is welded to the proximal metal plate (1). The opening part of the metal plate (1) is prepared with a tapered slope (21). The tapered slope (21) is connected to the near end metal plate (1). The inner extension weld (2) passes through the near end metal plate (1) and contacts the far end metal plate (3). The lower end of the tapered slope is a support platform (22). The diameter of the support platform is larger than the diameter of the through hole (11) of the near end metal plate. It rotates through the rotating end outside the near end metal plate (1) and is connected to the near end metal plate (1) and the far end metal plate (3) by friction welding.

2. The double-layer metal cavity plate with inwardly welded openings according to claim 1, characterized in that: The inner welded part (2) is a solid rod or an inner hollow rod. The upper outer surface of the inner welded part (2) is flush with or higher than the outer surface of the near-end metal plate (1).

3. The double-layer metal cavity plate with inwardly welded openings according to claim 1, characterized in that: The materials of the proximal metal plate (1) and the distal metal plate (3) are one or more of the following: steel, aluminum alloy, and titanium alloy.

4. A double-layer metal cavity plate with inwardly welded openings according to claim 1, characterized in that: The through hole (11) on the near end metal plate (1) has a flange (12) at its edge.

5. A double-layer metal cavity plate assembly structure, comprising the double-layer metal cavity plate with inward welded opening as described in claim 1, characterized in that: the space between the near-end metal plate (1) and the far-end metal plate (3) is filled with filler material.

6. The double-layer metal cavity plate composite structure according to claim 5, characterized in that: Vent and slurry discharge holes are provided on the near end metal plate (1) or the far end metal plate (3).

7. The double-layer metal cavity plate composite structure according to claim 5, characterized in that: The filler is concrete, and the concrete filler is filled using the injection method.

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