A rivet-welded clad metal plate

Abstract

The application relates to a riveting and welding layer structure metal plate, which comprises a first metal plate and a second metal plate, a plurality of filler through holes are formed on the surface of the first metal plate, the Brinell hardness of the first metal plate is higher than that of the second metal plate, and the second metal plate is attached to the first metal plate. When the second metal plate is subjected to hot rolling, the second metal plate is deformed and drives the surface of the second metal plate and the first metal plate to be attached to protrude along the filler through holes to form a protruding filling part, the filler through holes are filled by the protruding filling part, and the application has the effect of facilitating riveting between the metal plates of two different materials.

Description

Technical Field

[0001] This application relates to the field of metal sheets, and more particularly to a metal sheet with a welded layer structure. Background Technology

[0002] Metal composite panels achieve complementary properties of different metals through composite processes, combining excellent characteristics with cost advantages. They can balance lightweight and high strength, integrate multiple functions, and have strong environmental adaptability. They are widely used in chemical energy, building decoration, transportation, power electronics, metallurgical machinery, and household appliances and daily necessities.

[0003] Among them, Chinese invention patent, publication (announcement) number: CN113246486A, discloses a laser riveting welding method for a thermoplastic composite material and a metal lap joint structure, relating to the field of thermoplastic composite material and metal connection technology, including the following steps: pre-drilling through holes in a metal plate and a thermoplastic composite material sheet, the through holes being used to insert rivets; cleaning the thermoplastic composite material sheet, the metal plate, and the rivets to remove surface oil; after removing the oxide film on the surface of the metal plate, selecting pre-fabricated microstructures on the surface of the metal joint to be welded on the metal plate; nailing the rivets into the thermoplastic composite material sheet and making close contact with the metal plate; and performing laser welding on the lap joint of the thermoplastic composite material sheet and the metal plate. This invention can significantly improve the tensile strength and fatigue performance of the thermoplastic composite material and lightweight metal lap joint structure, and ensure good sealing performance of the connection joint.

[0004] In actual production, rivets need to be placed in pre-drilled through holes first, and then laser welding is used to weld the metal plate and the thermoplastic composite material plate. When it is necessary to bond and weld two different materials together, several pre-drilled through holes need to be opened on the surface of the metal plate, and rivets need to be placed in each pre-drilled through hole. The rivets are then welded one by one using laser welding equipment. The operation is complicated and there is room for improvement. Utility Model Content

[0005] The purpose of this utility model is to provide a metal plate with a riveted and welded layer structure to facilitate the riveting of two metal plates made of different materials.

[0006] To achieve the above objectives, the present application provides a welded layer structure metal plate with the following technical solution:

[0007] A welded layer structure metal plate includes a first metal plate and a second metal plate. The surface of the first metal plate has a plurality of filler through holes. The Brinell hardness of the first metal plate is higher than that of the second metal plate. The second metal plate is attached to the first metal plate. When the second metal plate is hot rolled, the second metal plate deforms and causes the surface of the second metal plate attached to the first metal plate to protrude along the filler through holes to form a protruding filling portion, which fills the filler through holes.

[0008] Preferably, the roughness of the inner wall of the packing through hole is between 3.2 and 6.3 μm.

[0009] Preferably, the end of the packing through hole facing away from the second metal plate has an overflow portion along the thickness direction of the first metal plate, and the cross-sectional area of ​​the overflow portion is larger than the cross-sectional area of ​​the packing through hole.

[0010] Preferably, a positioning platform is provided on the surface where the first metal plate and the second metal plate are attached, and a positioning groove is formed on the surface where the second metal plate and the first metal plate are attached. When the second metal plate is attached to the first metal plate, the positioning platform is located in the positioning groove.

[0011] Preferably, a third metal plate is disposed on the surface of the first metal plate opposite to the second metal plate, and the Brinell hardness of the third metal plate is the same as that of the second metal plate.

[0012] Preferably, the packing through-hole is arranged at an oblique angle.

[0013] Preferably, the surfaces on which the first metal plate and the second metal plate are bonded are pre-coated with a flux layer.

[0014] Compared with the prior art, the present invention provides a metal plate with a riveted and welded layer structure, which has the following advantages:

[0015] 1. Because the surface of the first metal plate has several filler through holes, and the Brinell hardness of the first metal plate is higher than that of the second metal plate, when the second metal plate is placed on the first metal plate and hot rolled, the second metal plate will deform. Under pressure, the second metal plate will deform, causing it to bulge along the filler through holes to form a bulging filling part. The bulging filling part fills the filler through holes, and the rivet to the first metal plate is achieved through the bulging filling part, without the need for rivets. The operation is simple and the stability is high.

[0016] 2. An overflow portion is provided at the end of the packing through hole facing away from the second metal plate along the thickness direction of the first metal plate. Thus, when the protruding filling portion fills the packing through hole, the second metal plate will continue to deform under continuous pressure, thereby continuing to fill the overflow portion. Since the cross-sectional area of ​​the overflow portion is larger than the cross-sectional area of ​​the packing through hole, a snap-fit ​​state is formed, further improving the stability of the fit between the first metal plate and the second metal plate.

[0017] 3. A third metal plate is disposed on the surface of the first metal plate away from the second metal plate, so that the two surfaces of the first metal plate along the thickness direction can be respectively attached to the first metal plate and the second metal plate to form a three-layer structure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a riveted layer structure metal plate according to Embodiment 1 of this application.

[0019] Figure 2 yes Figure 1 A cross-sectional schematic diagram of a metal plate with a riveted and welded layer structure.

[0020] Figure 3 yes Figure 2 A magnified structural diagram of part A in the middle.

[0021] Figure 4 This is a cross-sectional structural schematic diagram of an embodiment 2 of a riveted layer structure metal plate of this application.

[0022] Figure 5 yes Figure 4 A magnified structural diagram of part B.

[0023] Figure 6 This is a schematic diagram of the overall structure of a riveted layer structure metal plate according to Embodiment 3 of this application.

[0024] Figure 7 yes Figure 6 A cross-sectional schematic diagram of a metal plate with a riveted and welded layer structure.

[0025] Figure 8 This is a schematic cross-sectional view of a welded layer structure metal plate without chamfering, according to Embodiment 1 of this application.

[0026] Figure 9 This is a cross-sectional structural schematic diagram of embodiment 4 of a metal plate with a riveted and welded layer structure according to this application.

[0027] Explanation of reference numerals in the attached drawings: 1. First metal plate; 11. Filler through hole; 111. Pre-reserved burr; 12. Positioning platform; 2. Second metal plate; 21. Protruding filling part; 22. Positioning groove; 3. Overflow part; 4. Third metal plate; 41. Filling head; 5. Sound insulation cavity; 6. Guide part. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0029] Example 1

[0030] This application discloses a metal plate with a welded layer structure. (Refer to...) Figure 1 , Figure 2 as well as Figure 3 A welded layer structure metal plate includes a first metal plate 1 and a second metal plate 2. The surface of the first metal plate 1 is provided with a plurality of filler through holes 11. The Brinell hardness of the first metal plate 1 is higher than that of the second metal plate 2. The second metal plate 2 is attached to the first metal plate 1. When the second metal plate 2 is hot rolled, the second metal plate 2 deforms and causes the surface of the second metal plate 2 attached to the first metal plate 1 to bulge along the filler through holes 11 to form a protruding filling part 21. The protruding filling part 21 fills the filler through holes 11.

[0031] First, it should be noted that the "hot roller pressing" consists of a drive system, a heatable pressure roller driven by the drive system, and a support platform. First, the first metal plate 1 and the second metal plate 2 are preheated. Then, the first metal plate 1 is placed on the support platform, and the second metal plate 2 is attached to the first metal plate 1. Subsequently, the drive system is started, so that the drive system drives the heatable pressure roller to reciprocate and roll the second metal plate 2 along the first metal plate 1. When the second metal plate 2 is subjected to the pressure applied by the heatable pressure roller, the second metal plate 2 will deform. This is an existing pressure device, and its specific composition and working principle will not be described in detail here.

[0032] Because the Brinell hardness of the first metal plate 1 is higher than that of the second metal plate 2, for ease of explanation, in this embodiment, the first metal plate 1 is made of stainless steel and the second metal plate 2 is made of copper or aluminum (aluminum alloy).

[0033] Specifically, the filler through-hole 11 is formed by the first metal plate 1 through the thickness direction. Several filler through-holes 11 are evenly distributed along the surface of the first metal plate 1. Since the forming method and function of several filler through-holes 11 are the same, their specific number is not limited here.

[0034] Furthermore, the roughness of the inner wall of the packing through hole 11 is between 3.2 and 6.3 μm. At this time, there are pre-reserved burrs 111 on the inner wall of the packing through hole 11. When the second metal plate 2 is deformed under pressure, the protruding filling part 21 fills the packing through hole 11. The inner wall of the packing through hole 11 is in a rough state. During the filling process of the packing through hole 11, the protruding filling part 21 is in a high temperature state, which makes it easy to deform. The surfaces of the protruding filling part 21 and the pre-reserved burrs 111 are in close contact. After the protruding filling part 21 finishes filling the packing through hole 11, the pre-reserved burrs 111 and the protruding filling part 21 are in close contact to improve the tightness of the fit between the protruding filling part 21 and the packing through hole 11 and prevent the protruding filling part 21 from loosening along the packing through hole 11.

[0035] Reference Figure 2 and Figure 3 The filler through hole 11 is provided with an overflow section 3 at the end facing away from the second metal plate 2 along the thickness direction of the first metal plate 1. The cross-sectional area of ​​the overflow section 3 is larger than the cross-sectional area of ​​the filler through hole 11.

[0036] Specifically, in this embodiment, preferably, the cross-section of the packing through hole 11 is circular, and the cross-section of the overflow part 3 is also circular. Therefore, the diameter of the overflow part 3 needs to be larger than the diameter of the packing through hole 11, and the overflow part 3 is concentric with the packing through hole 11.

[0037] Furthermore, in this embodiment, preferably, the end of the packing through-hole 11 facing the second metal plate 2 is arranged at a chamfer angle, while in other embodiments, refer to... Figure 8 Therefore, the end of the filler through-hole 11 facing the second metal plate 2 does not need to be beveled. Thus, when the second metal plate 2 is hot rolled, because the filler through-hole 11 is in a beveled state, the beveled angle forms a guide part 6. When the second metal plate 2 deforms to form a protruding filling part 21, the guide part 6 guides the protruding filling part 21 to quickly enter the filler through-hole 11, increasing the rate at which the protruding filling part 21 enters the filler through-hole 11.

[0038] Therefore, when the protruding filling part 21 has finished filling the filling through hole 11, if the second metal plate 2 continues to be hot rolled, the protruding filling part 21 will overflow along the filling through hole 11 and begin to fill the overflow part 3. Since the diameter of the overflow part 3 is larger than the diameter of the protruding filling part 21, after the overflow part 3 is filled, the cross-sectional shape of the protruding filling part 21 is set in a T shape. At this time, the riveting of the first metal plate 1 and the second metal plate 2 is achieved through the protruding filling part 21, which has high stability.

[0039] Example 2

[0040] The difference between Example 2 and Example 1 is that, referring to... Figure 4 and Figure 5 A positioning platform 12 is provided on the surface where the first metal plate 1 and the second metal plate 2 are attached. A positioning groove 22 is provided on the surface where the second metal plate 2 and the first metal plate 1 are attached. When the second metal plate 2 is attached to the first metal plate 1, the positioning platform 12 is located in the positioning groove 22.

[0041] Furthermore, a flux layer is pre-coated on the surfaces where the first metal plate 1 and the second metal plate 2 are bonded. That is, before the second metal plate 2 is bonded to the first metal plate 1, a flux layer needs to be coated on the surface of the first metal plate 1. For example, in this embodiment, when the first metal plate 1 made of stainless steel and the second metal plate 2 made of aluminum need to be riveted together, a chloride-based (such as QJ201) or fluoride-chloride composite flux layer needs to be coated on the surface of the first metal plate 1 to improve the tightness of the riveted structure formed by hot rolling of the first metal plate 1 and the second metal plate 2.

[0042] Specifically, the positioning platform 12 is formed by protruding from the surface of the first metal plate 1 toward the second metal plate 2 along the thickness direction, and the positioning platform 12 is arranged circumferentially along the edge of the surface of the first metal plate 1.

[0043] Correspondingly, the positioning groove 22 is formed by the second metal plate 2 being recessed in the thickness direction towards the surface of the first metal plate 1, and the positioning groove 22 is circumferentially arranged along the edge of the surface of the second metal plate 2 in the thickness direction.

[0044] Therefore, when the second metal plate 2 is hot rolled, the positioning table 12 and the positioning groove 22 are used to limit the positional relationship between the second metal plate 2 and the first metal plate 1, thereby reducing the probability that the second metal plate 2 will be displaced along the first metal plate 1 when it is attached to the first metal plate 1 and hot rolled.

[0045] Example 3

[0046] The difference between Example 3 and Example 2 is that, referring to... Figure 6 and Figure 7 A third metal plate 4 is disposed on the surface of the first metal plate 1 away from the second metal plate 2, and the Brinell hardness of the third metal plate 4 is the same as that of the second metal plate 2.

[0047] Specifically, in this embodiment, preferably, the material of the third metal plate 4 is the same as that of the second metal plate 2.

[0048] Furthermore, after the second metal plate 2, which is attached to the first metal plate 1, undergoes preliminary hot rolling, the third metal plate 4 is attached to the surface of the first metal plate 1 facing away from the second metal plate 2, and the second metal plate 2 is attached to the support platform. The third metal plate 4 is then rolled by a hot pressure roller, causing deformation of the third metal plate 4. When the third metal plate 4 is subjected to pressure from the hot pressure roller, the third metal plate 4 will bulge along the overflow portion 3 near the overflow portion 3, forming a filling head 41. The overflow section 3 is filled by continuously applying force to the third metal plate 4 through the hot pressure roller, so as to drive the filling head 41 to continuously fill the overflow section 3. Since the second metal plate 2 and the third metal plate 4 are made of the same material, when the overflow section 3 abuts against the raised filling section 21, the overflow section 3 will fuse with the raised filling section 21, so that the second metal plate 2 and the third metal plate 4 are tightly connected through the overflow section 3 and the raised filling section 21. At this time, the first metal plate 1 is riveted between the second metal plate 2 and the third metal plate 4.

[0049] Example 4

[0050] The difference between Example 4 and Example 3 is that, referring to... Figure 9 After the third metal plate 4 and the second metal plate 2 are hot rolled along the first metal plate 1, a sound insulation cavity 5 is formed between the filling head 41 and the raised filling part 21 located in the filling through hole 11. The end of the filling through hole 11 facing the third metal plate 4 does not have an overflow part 3. That is, the end face of the filling head 41 and the end face of the raised filling part 21 are not in contact. Through the sound insulation cavity 5 formed in several filling through holes 11, a honeycomb sound insulation cavity 5 is formed. When the second metal plate 2 and / or the third metal plate 4 are subjected to external force, the sound generated during the impact is absorbed through the sound insulation cavity 5 to reduce the sound generated by the metal collision. At the same time, it can also weaken the sound transmission from the second metal plate 2 through the first metal plate 1 to the third metal plate 4.

[0051] The implementation principle of a riveted layer structure metal plate in this application embodiment is as follows: A filler through hole 11 is provided on the first metal plate 1. When the second metal plate 2 is hot-rolled by a hot pressure roller, the second metal plate 2 deforms and protrudes into the filler through hole 11 to form a protruding filling part 21. The riveting of the first metal plate 1 and the second metal plate 2 is achieved through the protruding filling part 21. After the riveting is completed, the first metal plate 1 and the second metal plate 2 can be cut by machining (e.g., CNC machining center), without the need to use rivets. Laser riveting is used, which plays a positive guiding role in improving the convenience of riveting between two metal plates of different materials.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A metal plate with a riveted and welded layer structure, characterized in that: The device includes a first metal plate (1) and a second metal plate (2). The surface of the first metal plate (1) is provided with a plurality of filler through holes (11). The Brinell hardness of the first metal plate (1) is higher than that of the second metal plate (2). The second metal plate (2) is attached to the first metal plate (1). When the second metal plate (2) is hot rolled, the second metal plate (2) deforms and causes the surface of the second metal plate (2) attached to the first metal plate (1) to bulge along the filler through holes (11) to form a protruding filling part (21). The protruding filling part (21) fills the filler through holes (11).

2. The riveted and welded layer structure metal plate according to claim 1, characterized in that: The roughness of the inner wall of the filler through hole (11) is between 3.2 and 6.3 μm.

3. A riveted layer structure metal plate according to claim 2, characterized in that: The filler through hole (11) is provided with an overflow part (3) at one end facing away from the second metal plate (2) along the thickness direction of the first metal plate (1), and the cross-sectional area of ​​the overflow part (3) is larger than the cross-sectional area of ​​the filler through hole (11).

4. A welded layer structure metal plate according to claim 3, characterized in that: A positioning platform (12) is provided on the surface where the first metal plate (1) and the second metal plate (2) are attached. A positioning groove (22) is provided on the surface where the second metal plate (2) and the first metal plate (1) are attached. When the second metal plate (2) is attached to the first metal plate (1), the positioning platform (12) is located in the positioning groove (22).

5. A welded layer structure metal plate according to claim 4, characterized in that: A third metal plate (4) is disposed on the surface of the first metal plate (1) away from the second metal plate (2). The Brinell hardness of the third metal plate (4) is the same as that of the second metal plate (2). The third metal plate (4) is attached to the first metal plate (1). When the third metal plate (4) is hot rolled, the surface of the third metal plate (4) facing the first metal plate (1) protrudes towards the filler through hole (11) to form a filler head (41).

6. A welded layer structure metal plate according to claim 5, characterized in that: After the third metal plate (4) and the second metal plate (2) are hot rolled, a sound insulation cavity (5) is formed between the filling head (41) located in the filling through hole (11) and the protruding filling part (21).

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