Metal composite plate and continuous preparation method thereof

Abstract

The invention relates to a metal composite plate and a continuous preparation method thereof, and belongs to the technical field of metal plates. The metal composite plate is composed of a base plate and multiple layers of compound plates which are stacked, the base plate and the compound plates are connected through double-end semi-hollow rivets, and the compound plates are connected through double-end semi-hollow rivets. According to the metal composite plate and the continuous preparation method thereof, the plates are connected through the double-end semi-hollow rivets, the plates are connected through mechanical deformation between the double-end semi-hollow rivets and the plates, the plates can be firmly connected, and the defects of layering and debonding are not prone to occurring. The plates do not need to be heated in the connecting process, and the production cost can be effectively reduced. The sheet does not need to be heated, so that the sheet is not easy to deform, and uniform connection can be ensured; and meanwhile, the strength and toughness of the thin plates are not required, so that the requirements on the thin plates are greatly reduced, and the thin plates can also be conveniently connected. The problems that an existing metal composite plate is high in production cost, prone to quality defects and not suitable for sheet compounding are solved.

Description

Technical Field

[0001] The invention relates to a metal composite plate and a continuous preparation method thereof, belonging to the technical field of metal plates. Background Art

[0002] With the rapid development of modern science and engineering technology, single metal materials are limited by their performance and can no longer meet the actual needs of engineering production. For example, in the fields of chemical industry, oil and gas extraction, aerospace and advanced weapons manufacturing, materials need to withstand high temperature, heavy load, corrosion and other harsh working conditions at the same time, which places very high demands on the performance of materials. It is difficult for a single metal material to meet multiple needs at the same time. In order to solve practical problems in engineering, metal composite panels came into being.

[0003] Metal composite plates are plates made by combining two or more different metal materials in the thickness direction through a specific processing technology. Metal composite plates can combine the excellent properties of different metals. For example, in some application scenarios that require both strength and corrosion resistance, high-strength metals (such as carbon steel) are used as the base layer to provide the strength required for structural support and withstand large external forces such as pressure and tension; and metals with strong corrosion resistance (such as stainless steel, titanium, etc.) are used as cladding to protect the internal base metal from the corrosive environment. For example, metal composite plates used in chemical containers and marine engineering equipment, this combination of different metal properties can enable them to work stably for a long time in harsh chemical media or seawater environments. In addition, metal composite plates can effectively reduce the consumption of expensive metals and reduce production costs. For example, pure titanium metal is expensive, but in some chemical equipment with extremely high corrosion resistance requirements, if all titanium materials are used, the cost will be very high. When using titanium-steel composite plates, titanium is only used on the surface in contact with the corrosive medium, and relatively low-priced steel is used as the base layer on the outside to provide strength. This can reduce the consumption of titanium metal while ensuring corrosion resistance, greatly reducing material costs.

[0004] At present, the production process of metal composite plates mainly includes explosive bonding and rolling bonding. The explosive bonding method is a technology that uses the impact force generated by the explosion of explosives to cause different metal plates to collide at high speed, forming plastic deformation, melting and interatomic diffusion on the contact surface, thereby achieving metallurgical bonding between metals (see the attached manual). Figure 1 ).

[0005] Explosive welding composite plates have many advantages. First, they have a wide range of uses and can quickly and strongly weld any variety of metal materials. In particular, they can be explosively composited for metals with very different melting points, thermal expansion coefficients, and hardness. Second, they have a wide range of weldable sizes. The size and specifications of explosively welded metal plates are not limited by equipment conditions, and the applicable range of plate thickness is very wide. Third, the performance of welded components is excellent. Explosive welding components have high bonding strength and excellent performance, and have good processing performance. However, the explosive composite method also has disadvantages: First, explosive composite requires the use of directional blasting technology, and requires a large amount of explosives to be laid on the plate (the larger the composite area, the more explosives are laid). Both in terms of technical requirements and safety, there are extremely high requirements, and explosives and buffer layers are consumables, resulting in extremely high production costs; at the same time, due to the production through explosion, in order to ensure safety, the production process is generally carried out in the open air in the field. The production is limited by climate and weather, and the production efficiency is low, which further increases its production cost. Secondly, the metal to be welded must have sufficient toughness and impact resistance to withstand the explosion force and collision. For thin plates that cannot withstand the impact of explosives, they cannot be welded. In addition, during the composite process of large-size plates, the long transmission distance of the detonation wave and the attenuation of the detonation stability will lead to quality problems such as edge misalignment.

[0006] Rolling bonding refers to the metallurgical process in which two or more metal plates are pressed under certain conditions of temperature and pressure to make the atoms at the interface of the plates diffuse mutually and thus firmly bonded under the action of a heavy rolling mill (see the attached manual). Figure 2 ). Rolling lamination is not restricted by site or weather, and does not use consumables such as explosives and buffer layers. Compared with explosive lamination, it can greatly reduce production costs, technical requirements and safety risks. In addition, rolling lamination does not have the problem of extrusion force attenuation, which can ensure the fit between the edge plates and thus ensure product quality. However, in order to ensure the rapid mutual diffusion between atoms and the bonding between the plates, the plates need to be heated before rolling. First, the energy consumption during the heating process will lead to increased production costs; second, for thin plates, heating is easy to deform, and the deformation is random and uncontrollable. During rolling, it is easy to cause uneven bonding, which affects product quality. At the same time, because the rolling process only applies force to the plate for a short time, the mutual diffusion between atoms will not be too deep, that is, the bonding between the plates will not be too strong, which can easily lead to insufficient bonding strength at the composite interface, and quality defects such as delamination and debonding.

[0007] Therefore, it is necessary to design a metal composite plate and a continuous preparation method thereof to solve the above problems. Summary of the invention

[0008] The purpose of the present invention is to provide a metal composite plate and a continuous preparation method thereof which can be evenly combined, ensure product quality and reduce production costs in view of the shortcomings of the prior art.

[0009] The technical solution of the present invention is: A metal composite plate is composed of a laminated base plate and multiple layers (at least one layer) of composite plates, and is characterized in that the base plate and the composite plates, and the composite plates are connected by double-headed semi-hollow rivets.

[0010] The double-headed semi-hollow rivet is composed of a partition plate, a riveted upper leg and a riveted lower leg. The top of the partition plate is provided with a riveted upper leg, and the bottom of the partition plate is provided with a riveted lower leg.

[0011] The riveted upper leg and the riveted lower leg are respectively annular cavities with uniform wall thickness.

[0012] The riveted upper leg and the riveted lower leg are respectively annular cavities with a wall thickness on one side being greater than that on the opposite side.

[0013] A positioning flange is arranged on the outer side of the partition plate.

[0014] A continuous preparation method of a metal composite plate, characterized in that it comprises the following steps: (1) According to the width of the substrate and the connection strength requirements between the plates, evenly select the connection points on the substrate; (2) Unwind the rolled substrate and convey the substrate to the lower die of the punching machine; insert the riveted lower leg of the double-headed semi-hollow rivet through the punching machine and fix it on the substrate with the connection point as the center; when the riveted lower leg is connected to the substrate in place, the punching machine is reset; (3) Repeat step 2) to continuously rivet double-headed semi-hollow rivets on the substrate; (4) The substrate riveted with double-headed semi-hollow rivets is continuously conveyed between the upper roller and the lower roller; during the continuous conveying of the substrate, the rolled composite plate is unrolled and the composite plate is conveyed between the upper roller and the lower roller; (5) The base plate and the double plate enter the upper roller and the lower roller, and the upper roller and the lower roller squeeze the base plate and the double plate, and the riveted upper leg of the double-headed semi-hollow rivet on the base plate is inserted and fixed on the double plate, so that the base plate and the double plate are connected by the double-headed semi-hollow rivet; (6) For a multi-layer metal composite plate (at least two layers of composite plates), the connected base plate and composite plate are integrated as a new base plate, and steps 1) to 5) are repeated to rivet the multi-layer composite plates respectively.

[0015] The front end of the lower roller is provided with an adjusting wheel so as to adjust the conveying angle of the substrate through the adjusting wheel.

[0016] The punching machine comprises an upper die and a lower die. The cross section of the upper die is in the shape of an inverted "mountain". A die column is arranged at the center of the upper die so as to straighten and limit the riveting upper leg through the upper die during the riveting process of the double-headed semi-hollow rivet and the base plate.

[0017] A continuous preparation method of a metal composite plate, characterized in that it comprises the following steps: (1) According to the width of the substrate and the connection strength requirements between the plates, evenly select the connection points on the substrate; (2) Unwind the rolled substrate and convey the substrate to the lower die of the punching machine; with the connection point as the center, point the side with the thicker wall of the riveted lower leg of the double-headed semi-hollow rivet toward the front end in the conveying direction of the substrate, and insert and fix the riveted lower leg on the substrate through the punching machine; when the riveted lower leg is connected to the substrate in place, the punching machine is reset; (3) Repeat step 2) to continuously rivet double-headed semi-hollow rivets on the substrate; (4) The substrate riveted with double-headed semi-hollow rivets is continuously conveyed between the upper roller and the lower roller; during the continuous conveying of the substrate, the rolled composite plate is unrolled and the composite plate is conveyed between the upper roller and the lower roller; (5) The base plate and the double plate enter the upper roller and the lower roller, and the upper roller and the lower roller squeeze the base plate and the double plate, and the riveted upper leg of the double-headed semi-hollow rivet on the base plate is inserted and fixed on the double plate, so that the base plate and the double plate are connected by the double-headed semi-hollow rivet; (6) For a multi-layer metal composite plate (at least two layers of composite plates), the connected base plate and composite plate are integrated as a new base plate, and steps 1) to 5) are repeated to rivet the multi-layer composite plates respectively.

[0018] The punching machine comprises an upper die and a lower die. The cross section of the upper die is in the shape of an inverted "mountain". The die column of the upper die is eccentrically arranged so that the upper leg of the riveting can be straightened and limited by the upper die during the riveting process of the double-headed semi-hollow rivet and the base plate.

[0019] The beneficial effects of the present invention are: The metal composite plate and its continuous preparation method connect the plates through double-headed semi-hollow rivets, which rely on the mechanical deformation between the double-headed semi-hollow rivets and the plates to connect the plates, and can firmly connect the plates without the defects of delamination and debonding. The connection process does not require heating of the plates, which can effectively reduce production costs. Since there is no need to heat the plates, the thin plates are not easy to deform, and uniform connection can be guaranteed; at the same time, neither strength nor toughness is required for the thin plates, and the requirements for the thin plates are greatly reduced, and the thin plates can also be easily connected. The problem that the existing metal composite plates have high production costs, are prone to quality defects, and are not suitable for thin plate composites is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the principle of explosive compounding; Figure 2 It is a schematic diagram of the principle of rolling compounding; Figure 3 It is a schematic structural diagram of a metal composite plate (single-layer composite plate) according to Example 1 of the present invention; Figure 4 Schematic diagram of the structure of the metal composite plate (single-layer composite plate) according to Example 2 of the present invention; Figure 5 It is a schematic diagram of the production of the metal composite plate (single-layer composite plate) according to Example 1 of the present invention; Figure 6 yes Figure 5 The enlarged schematic diagram of point A in the middle; Figure 7 It is a schematic diagram of the production of the metal composite plate (single-layer composite plate) according to Example 2 of the present invention; Figure 8 yes Figure 7 A magnified schematic diagram of center A.

[0021] In the figure: 1, base plate, 2, double plate, 3, partition plate, 4, riveted upper leg, 5, riveted lower leg, 6, positioning flange, 7, upper die, 8, upper roller, 9, lower roller, 10, adjusting wheel, 11, die column, 12, buffer layer, 13, explosive, 14, support block, 15, welding platform, 16, rolling roller. DETAILED DESCRIPTION Example 1

[0022] The metal composite plate is composed of a laminated substrate 1 and a multi-layer (at least one layer) composite plate 2. The substrate 1 and the composite plate 2, and the composite plates 2 and the composite plates 2 are connected by double-headed semi-hollow rivets. The substrate 1 and the composite plate 2 are firmly connected by mechanical deformation between the substrate 1 and the double-headed semi-hollow rivet, and between the composite plate 2 and the double-headed semi-hollow rivet. Since it is connected by mechanical deformation, no explosives are required, so the technical requirements and safety risks can be effectively reduced; at the same time, it is not connected by mutual diffusion between atoms at the interface, so it does not need to heat the plate, which can effectively reduce energy consumption and thus reduce production costs.

[0023] The double-headed semi-hollow rivet is composed of a partition plate 3, a riveted upper leg 4 and a riveted lower leg 5. The top of the partition plate 3 is provided with a riveted upper leg 4 to be riveted to the double plate 2 through the riveted upper leg 4. The bottom of the partition plate 3 is provided with a riveted lower leg 5 to be riveted to the base plate 1 through the riveted lower leg 5. The function of the partition plate 3 is to push the double-headed semi-hollow rivet downward through the punching force acting on the partition plate 3, and then insert the double-headed semi-hollow rivet into the base plate 1 and fix it; at the same time, through the interaction between the partition plate 3 and the base plate 1, the insertion depth of the double-headed semi-hollow rivet is limited to prevent the double-headed semi-hollow rivet from being inserted too deeply and penetrating the base plate 1 or the double plate 2.

[0024] The riveted upper leg 4 and the riveted lower leg 5 are respectively annular cavities with uniform wall thickness. Conical surfaces are respectively arranged on the inner sides of the ports of the riveted upper leg 4 and the riveted lower leg 5 to guide the deformation direction of the riveted upper leg 4 and the riveted lower leg 5 through the conical surfaces, so that the riveted upper leg 4 and the riveted lower leg 5 deform outward instead of collapsing inward, thereby ensuring that the mechanical deformation of the riveted upper leg 4 and the riveted lower leg 5 and the plate respectively can enable the double-headed semi-hollow rivet to be firmly connected to the plate.

[0025] A positioning flange 6 is arranged outside the partition plate 3. The function of the positioning flange 6 is to further limit the double-headed semi-hollow rivet through the positioning flange 6, and cooperate with the partition plate 3 to prevent the double-headed semi-hollow rivet from penetrating too deeply and piercing the plate.

[0026] The continuous preparation method of the metal composite plate comprises the following steps: According to the width of the substrate 1 and the connection strength requirements between the plates, connection points are evenly selected on the substrate.

[0027] The rolled substrate 1 is unrolled and conveyed to the lower die of the punching machine; with the connection point as the center, the riveted lower leg 5 of the double-headed semi-hollow rivet is inserted and fixed on the substrate 1 through the punching machine; when the riveted lower leg 5 is connected to the substrate 1 in place, the punching machine is reset. The above process is repeated to continuously rivet the double-headed semi-hollow rivets on the substrate 1.

[0028] The base plate 1 riveted with double-headed semi-hollow rivets is continuously conveyed between the upper roller 8 and the lower roller 9 ; during the continuous conveying of the base plate 1 , the rolled composite plate 2 is unrolled and the composite plate 2 is conveyed between the upper roller 8 and the lower roller 9 .

[0029] The base plate 1 and the composite plate 2 enter the upper roller 8 and the lower roller 9, and the upper roller 8 and the lower roller 9 squeeze the base plate 1 and the composite plate 2, and insert and fix the riveted upper leg 4 of the double-headed semi-hollow rivet on the base plate 1 on the composite plate 2, so that the base plate 1 and the composite plate 2 are connected through the double-headed semi-hollow rivet. When the upper roller 8 and the lower roller 9 squeeze the plate, the upper roller 8 and the lower roller 9 squeeze the plate from front to back in sequence, and do not punch from top to bottom, so that the upper roller 8 and the lower roller 9 squeeze the plate in sequence. During the squeezing process of the upper roller 8 and the lower roller 9, the squeezing force will first act on the front end of the double-headed semi-hollow rivet. At the same time, due to the forward movement of the plate, the front end of the riveted upper leg of the double-headed semi-hollow rivet will collapse to the rear end, and the front end of the riveted upper leg will be pulled out of the plate upward, which will easily lead to connection failure. The solution of this embodiment is: an adjusting wheel 10 is provided at the front end of the lower roller 9, so as to adjust the conveying angle of the substrate 1 through the adjusting wheel 10, so that the substrate 1 riveted with the double-headed semi-hollow rivet is fitted to the double plate 2, and then the riveted upper leg 4 of the double-headed semi-hollow rivet is pre-pierced into the double plate 2 through the tension between the plates, thereby reducing the interaction force between the plate and the double-headed semi-hollow rivet during the squeezing process of the plate by the upper roller 8 and the lower roller 9, ensuring that the riveted upper leg 4 is not easy to collapse to the rear end, and the riveted lower leg 5 is not easy to be pulled out of the substrate 1, thereby ensuring the reliable connection between the double-headed semi-hollow rivet and the plate, thereby ensuring the firm connection between the substrate 1 and the double plate 2.

[0030] For a multi-layer metal composite plate (at least two layers of composite plates), the connected base plate 1 and composite plate 2 are taken as a whole as a new base plate, and the above process is repeated to rivet the multi-layer composite plates 2 respectively.

[0031] The punching machine includes an upper die 7 and a lower die. The cross section of the upper die 7 is in the shape of an inverted "mountain". A die column 11 is arranged at the center of the upper die 7 to straighten and limit the riveted upper leg 4 through the upper die 7 during the riveting process of the double-headed semi-hollow rivet and the base plate 1. Example 2

[0032] The metal composite plate is composed of a laminated substrate 1 and a multi-layer (at least one layer) composite plate 2. The substrate 1 and the composite plate 2, and the composite plates 2 and the composite plates 2 are connected by double-headed semi-hollow rivets. The substrate 1 and the composite plate 2 are firmly connected by mechanical deformation between the substrate 1 and the double-headed semi-hollow rivet, and between the composite plate 2 and the double-headed semi-hollow rivet. Since it is connected by mechanical deformation, no explosives are required, so the technical requirements and safety risks can be effectively reduced; at the same time, it is not connected by mutual diffusion between atoms at the interface, so it does not need to heat the plate, which can effectively reduce energy consumption and thus reduce production costs.

[0033] The double-headed semi-hollow rivet is composed of a partition plate 3, a riveted upper leg 4 and a riveted lower leg 5. The top of the partition plate 3 is provided with a riveted upper leg 4 to be riveted to the double plate 2 through the riveted upper leg 4. The bottom of the partition plate 3 is provided with a riveted lower leg 5 to be riveted to the base plate 1 through the riveted lower leg 5. The function of the partition plate 3 is to push the double-headed semi-hollow rivet downward through the punching force acting on the partition plate 3, and then insert the double-headed semi-hollow rivet into the base plate 1 and fix it; at the same time, through the interaction between the partition plate 3 and the base plate 1, the insertion depth of the double-headed semi-hollow rivet is limited to prevent the double-headed semi-hollow rivet from being inserted too deeply and penetrating the base plate 1 or the double plate 2.

[0034] The riveted upper leg 4 and the riveted lower leg 5 are respectively annular cavities with a wall thickness on one side greater than that on the opposite side. Conical surfaces are respectively provided on the inner sides of the ports of the riveted upper leg 4 and the riveted lower leg 5 to guide the deformation direction of the riveted upper leg 4 and the riveted lower leg 5 through the conical surfaces, so that the riveted upper leg 4 and the riveted lower leg 5 deform outward instead of collapsing inward, thereby ensuring that the mechanical deformation of the riveted upper leg 4 and the riveted lower leg 5 and the plate can firmly connect the double-headed semi-hollow rivet to the plate.

[0035] A positioning flange 6 is arranged outside the partition plate 3. The function of the positioning flange 6 is to further limit the double-headed semi-hollow rivet through the positioning flange 6, and cooperate with the partition plate 3 to prevent the double-headed semi-hollow rivet from penetrating too deeply and piercing the plate.

[0036] The continuous preparation method of the metal composite plate comprises the following steps: According to the width of the substrate 1 and the connection strength requirements between the plates, connection points are evenly selected on the substrate 1 .

[0037] The rolled substrate 1 is unwound and conveyed to the lower die of the punching machine. With the connection point as the center, the side with the thicker wall of the riveted lower leg 5 of the double-headed semi-hollow rivet is directed toward the front end of the conveying direction of the substrate 1, and the riveted lower leg 5 is inserted and fixed on the substrate 1 through the punching machine. When the riveted lower leg 5 is connected to the substrate 1 in place, the punching machine is reset. Repeat the above process to continuously rivet the double-headed semi-hollow rivets on the substrate 1.

[0038] The base plate 1 riveted with double-headed semi-hollow rivets is continuously conveyed between the upper roller 8 and the lower roller 9. During the continuous conveying of the base plate 1, the rolled composite plate 2 is unwound and the composite plate 2 is conveyed between the upper roller 8 and the lower roller 9.

[0039] The base plate 1 and the composite plate 2 enter the upper roller 8 and the lower roller 9, and the upper roller 8 and the lower roller 9 squeeze the base plate 1 and the composite plate 2, and insert and fix the riveted upper leg 4 of the double-headed semi-hollow rivet on the base plate 1 on the composite plate 2, so that the base plate 1 and the composite plate 2 are connected through the double-headed semi-hollow rivet. When the upper roller 8 and the lower roller 9 squeeze the plate, the upper roller 8 and the lower roller 9 squeeze the plate from front to back in sequence, and do not punch from top to bottom, so that the upper roller 8 and the lower roller 9 squeeze the plate in sequence. During the squeezing process of the upper roller 8 and the lower roller 9, the squeezing force will first act on the front end of the double-headed semi-hollow rivet. At the same time, due to the forward movement of the plate, the front end of the riveted upper leg of the double-headed semi-hollow rivet will collapse to the rear end, and the front end of the riveted upper leg will be pulled out of the plate upward, which will easily lead to connection failure. The solution of this embodiment is: by increasing the wall thickness of one side of the riveted upper leg 4 and the riveted lower leg 5, and aligning the riveted upper leg 4 and the riveted lower leg 5 on the side with the larger wall thickness toward the front end in the conveying direction of the substrate 1, the riveted upper leg 4 and the riveted lower leg 5 on the side with the larger wall thickness are first subjected to force. Due to the increase in wall thickness, the strength of the side of the riveted upper leg 4 and the riveted lower leg 5 that is first subjected to force is enhanced, so that it is not easy to collapse to the rear end when the riveted upper leg 4 is subjected to force, and the riveted lower leg 5 is not easy to be pulled out of the substrate 1, thereby ensuring the connection reliability and ensuring the firm connection between the substrate 1 and the composite plate 2.

[0040] For a multi-layer metal composite plate (at least two layers of composite plates), the connected base plate 1 and composite plate 2 are taken as a whole as a new base plate, and the above process is repeated to rivet the multi-layer composite plates 2 respectively.

[0041] The punching machine includes an upper die 7 and a lower die. The cross section of the upper die 7 is in the shape of an inverted "mountain". The die column 11 of the upper die 7 is eccentrically arranged to straighten and limit the riveted upper leg 4 through the upper die 7 during the riveting process of the double-headed semi-hollow rivet and the base plate 1.

[0042] The metal composite plate and its continuous preparation method connect the plates through double-headed semi-hollow rivets, which rely on the mechanical deformation between the double-headed semi-hollow rivets and the plates to connect the plates, and can firmly connect the plates without the defects of delamination and debonding. The connection process does not require heating of the plates, which can effectively reduce production costs. Since there is no need to heat the plates, the thin plates are not easy to deform, and uniform connection can be guaranteed; at the same time, neither strength nor toughness is required for the thin plates, and the requirements for the thin plates are greatly reduced, and the thin plates can also be easily connected. The problem that the existing metal composite plates have high production costs, are prone to quality defects, and are not suitable for thin plate composites is solved.

Claims

1. A metal composite plate, comprising a laminated substrate (1) and a multi-layer (at least one layer) composite plate (2), characterized in that: The base plate (1) and the double plate (2), and the double plates (2) and the double plates (2) are connected via double-headed semi-hollow rivets.

2. A metal composite plate according to claim 1, characterized in that: The double-headed semi-hollow rivet is composed of a partition plate (3), a riveted upper leg (4) and a riveted lower leg (5), wherein the top of the partition plate (3) is provided with the riveted upper leg (4) and the bottom of the partition plate (3) is provided with the riveted lower leg (5).

3. A metal composite plate according to claim 2, characterized in that: The riveted upper leg (4) and the riveted lower leg (5) are respectively annular cavities with uniform wall thickness.

4. A metal composite plate according to claim 2, characterized in that: The riveted upper leg (4) and the riveted lower leg (5) are respectively annular cavities with a wall thickness on one side being greater than a wall thickness on the opposite side.

5. The metal composite plate according to claim 2, characterized in that: A positioning flange (6) is provided on the outer side of the partition plate (3).

6. A continuous preparation method of a metal composite plate, characterized in that: It includes the following steps: 1) According to the width of the substrate (1) and the connection strength requirements between the plates, evenly select connection points on the substrate; 2) unwinding the rolled substrate (1) and conveying the substrate (1) to the lower die of the punching machine; inserting the riveted lower leg (5) of the double-headed semi-hollow rivet through the punching machine and fixing it on the substrate (1) with the connection point as the center; when the riveted lower leg (5) is connected to the substrate (1) in place, the punching machine is reset; 3) Repeat step (2) to continuously rivet double-headed semi-hollow rivets on the substrate (1); 4) The base plate (1) riveted with double-headed semi-hollow rivets is continuously conveyed between the upper roller (8) and the lower roller (9); while the base plate (1) is continuously conveyed, the rolled composite plate (2) is unrolled, and the composite plate (2) is conveyed between the upper roller (8) and the lower roller (9); 5) The base plate (1) and the double plate (2) enter the upper roller (8) and the lower roller (9), and the upper roller (8) and the lower roller (9) squeeze the base plate (1) and the double plate (2) to insert and fix the riveted upper leg (4) of the double-headed semi-hollow rivet on the base plate (1) on the double plate (2), thereby connecting the base plate (1) and the double plate (2) through the double-headed semi-hollow rivet; 6) For a multi-layer metal composite plate (at least two layers of composite plates), the connected base plate (1) and composite plate (2) are integrated as a new base plate, and steps (1) to (5) are repeated to rivet the multi-layer composite plates (2) respectively.

7. The method for continuously preparing a metal composite plate according to claim 6, characterized in that: An adjusting wheel (10) is provided at the front end of the lower roller (9), so that the conveying angle of the substrate (1) can be adjusted through the adjusting wheel (10).

8. The method for continuously preparing a metal composite plate according to claim 6, characterized in that: The punching machine comprises an upper die (7) and a lower die. The cross section of the upper die (7) is in the shape of an inverted "mountain". A die column (11) is arranged at the center of the upper die (7) so as to straighten and limit the riveted upper leg (4) through the upper die (7) during the riveting process of the double-headed semi-hollow rivet and the base plate (1).

9. A continuous preparation method of a metal composite plate, characterized in that: It includes the following steps: 1) uniformly selecting connection points on the substrate (1) according to the width of the substrate (1) and the connection strength requirements between the plates; 2) unwinding the rolled substrate (1) and conveying the substrate (1) to the lower die of the punching machine; with the connection point as the center, the side with a thicker wall of the riveted lower leg (5) of the double-headed semi-hollow rivet is oriented toward the front end in the conveying direction of the substrate (1), and the riveted lower leg (5) is inserted and fixed on the substrate (1) through the punching machine; when the riveted lower leg (5) is connected to the substrate (1) in place, the punching machine is reset; 3) Repeat step (2) to continuously rivet double-headed semi-hollow rivets on the substrate (1); 4) The base plate (1) riveted with double-headed semi-hollow rivets is continuously conveyed between the upper roller (8) and the lower roller (9); while the base plate (1) is continuously conveyed, the rolled composite plate (2) is unrolled, and the composite plate (2) is conveyed between the upper roller (8) and the lower roller (9); 5) The base plate (1) and the double plate (2) enter the upper roller (8) and the lower roller (9), and the upper roller (8) and the lower roller (9) squeeze the base plate (1) and the double plate (2) to insert and fix the riveted upper leg (4) of the double-headed semi-hollow rivet on the base plate (1) on the double plate (2), thereby connecting the base plate (1) and the double plate (2) through the double-headed semi-hollow rivet; 6) For a multi-layer metal composite plate (at least two layers of composite plates), the connected base plate (1) and composite plate (2) are integrated as a new base plate, and steps (1) to (5) are repeated to rivet the multi-layer composite plates (2) respectively.

10. The method for continuously preparing a metal composite plate according to claim 9, characterized in that: The punching machine comprises an upper die (7) and a lower die. The cross section of the upper die (7) is in the shape of an inverted "mountain". The die column (11) of the upper die (7) is eccentrically arranged so that the upper leg (4) of the riveting can be straightened and limited by the upper die (7) during the riveting process of the double-headed semi-hollow rivet and the base plate (1).

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