Rolling equipment and rolling method for clad metal composite plate

Abstract

The present invention discloses a rolling device and a rolling method for a clad metal composite plate, which relates to the technical field of clad metal composite plate preparation, and aims to solve the problems of cracking and poor stability caused by incomplete edge closure and low interface bonding strength of currently prepared metal composite plates. The rolling device comprises: a three-roller cross-rolling mill, a special-shaped roller mill, and multiple rolling mill groups; the three-roller cross-rolling mill group is used for rolling metal composite rods; the special-shaped roller mill is arranged downstream of the three-roller cross-rolling mill group, and its working roller surface has an inner concave roller surface, which is used to pre-roll the metal composite rod into an elliptical cross-section; the multiple rolling mill groups are arranged downstream of the three-roller cross-rolling mill group in sequence along the rolling direction, each rolling mill group comprises a first two-roller mill and a second two-roller mill, the first two-roller mill rolls the metal composite rod into a clad metal composite plate through a first rolling plane, and the second two-roller mill rolls the side shape through a second rolling plane, and the first rolling plane and the second rolling plane are perpendicular to each other.

Description

Technical Field

[0001] The present invention relates to the technical field of preparing clad metal composite plates, and in particular to rolling equipment and a rolling method for clad metal composite plates. Background Art

[0002] Metal composite panels are widely used in the petroleum, chemical, power, transportation, aerospace, and other fields due to their excellent wear resistance, corrosion resistance, oxidation resistance, lightweight, high specific strength, vibration and noise reduction, and electromagnetic properties. Currently, the main methods for preparing metal composite panels include direct rolling, explosive rolling, sintering, casting and rolling, inverse solidification, and electromagnetic continuous casting. Each of these methods has its own advantages, and the appropriate method can be selected based on the specific type, specification, and size of the metal composite panel to meet diverse application requirements. However, the edges of metal composite panels prepared using these methods expose the bonding interface, which to some extent limits their application in highly corrosive and oxidizing environments. Furthermore, the open edge interface is prone to cracking, which reduces the stability of the composite panel. Therefore, protecting the edge interface of the composite panel is urgent. Wrapped metal composite panels use material A to completely encapsulate material B, effectively preventing the exposure of the edge interface, significantly improving the stability and safety of the composite panel, and showing broad application prospects and promotion value. However, improving the interfacial bonding strength of clad metal composite panels and developing efficient and reliable preparation technologies are still difficult problems that need to be overcome in the industry.

[0003] An existing process for manufacturing clad metal composite panels involves continuously extruding metal A into a core blank, then continuously deforming metal B into a cladding blank. This core blank is then longitudinally clad with metal A to form a composite blank. The composite blank is then molded and continuously reduced in diameter, and then is isothermal rolled to form the clad metal composite panel. This process is only suitable for producing clad metal composite panels with thin, easily deformable outer layers; it is difficult to produce clad metal composite panels with high melting points, high strength, and thick outer walls. Furthermore, the high temperature of isothermal rolling results in the formation of a large amount of intermetallic compounds at the interface, which reduces the interfacial bonding strength and is prone to cracking, resulting in incomplete closure of the clad metal composite panel. Summary of the Invention

[0004] The object of the present invention is to provide a rolling device and a rolling method for a clad metal composite plate, which are used to solve the problems of cracking and poor stability caused by incomplete edge closure and low interface bonding strength of the metal composite plate.

[0005] In order to achieve the above objectives, in a first aspect, the present invention provides a rolling equipment for a clad composite plate, comprising:

[0006] Three-roller cross-rolling mill, which is used to roll the metal composite bar blank into metal composite bars;

[0007] A special-shaped rolling mill is arranged downstream of the three-roller cross-rolling mill. The working roll surface of the special-shaped rolling mill has an inner concave roll surface and is used to pre-roll the metal composite rod into an elliptical cross-section;

[0008] Multiple rolling mill groups are arranged in sequence downstream of the special-shaped rolling mill along the rolling direction. Each rolling mill group includes a first two-roll rolling mill and a second two-roll rolling mill. The first two-roll rolling mill rolls the metal composite rod into a clad metal composite plate through a first rolling plane, and the second two-roll rolling mill rolls the side shape of the clad metal composite plate through a second rolling plane. The first rolling plane and the second rolling plane are perpendicular.

[0009] Compared with the prior art, the present invention provides a rolling equipment for a clad metal composite plate. During the rolling of the clad metal composite plate, the metal composite rod blank is first placed into a three-roll cross-rolling mill. The atoms of the metal composite rod blank diffuse at the composite interface under the rolling of the three-roll cross-rolling mill to form a metallurgical bonding layer to obtain a metal composite rod. Subsequently, the metal composite rod enters a special-shaped rolling mill, and the concave roll surface of the working roll pre-rolls the metal composite rod to obtain a metal composite rod with an elliptical cross-section. The width direction dimension of the metal composite rod is increased, thereby avoiding stress concentration at the edge when directly rolled into a plate shape. Subsequently, the metal composite rod enters the rolling mill, and is rolled on two mutually perpendicular planes by the first two-roll rolling mill and the second two-roll rolling mill in the rolling mill. The first two-roll rolling mill reduces the thickness of the metal composite rod along the first rolling plane to the target size, and then enters the second two-roll rolling mill. The second two-roll rolling mill applies lateral extrusion pressure on both sides of the metal composite rod along the second rolling plane, so that the outer layer of metal is wrapped toward the center and the edge interface is closed. Finally, the obtained clad metal composite plate is subjected to cyclic rolling by multiple groups of rolling mills to obtain a clad metal composite plate of target thickness. In this way, by carrying out the coordinated operation of three-roll oblique rolling interface bonding, special-shaped pre-rolling to disperse stress, lateral extrusion to close the edge, and multi-pass cyclic rolling to strengthen the interface on the metal composite rod blank, a clad metal composite plate with good edge closure and high interface bonding strength is obtained, which reduces the cracking rate of the clad metal composite plate and improves the stability of the clad metal composite plate. Compared with the existing method of continuously deforming the clad blank and then longitudinally coating it on the outside of the core blank, then connecting the butt joints of the clad blank, and finally rolling it into a clad metal composite plate, the present application rolls the metal composite rod obtained by rolling the three-roll oblique rolling mill to obtain a clad metal composite plate, which is not limited to the thickness of the clad blank and whether it is easy to bend and deform, and has a wider applicability.

[0010] Optionally, in the above-mentioned rolling equipment for the clad metal composite plate, the concave roller surface of the special-shaped roller mill is a concave arc roller surface, and the ratio of the curvature radius of the concave arc roller surface to the radius of the metal composite rod is greater than or equal to 1.05 and less than or equal to 1.80.

[0011] Optionally, in the above-mentioned rolling equipment for the clad metal composite plate, a special-shaped roller mill is further provided between two adjacent rolling mill groups.

[0012] Optionally, in the above-mentioned rolling equipment for clad metal composite plates, the curvature radius of the inner concave roller surfaces of the multiple special-shaped roller mills gradually increases along the conveying direction of the metal composite rod.

[0013] Optionally, in the above-mentioned rolling equipment for the clad metal composite plate, the rolling equipment for the clad metal composite plate also includes a temperature control device, which is arranged between the three-roller cross-rolling mill and the special-shaped roller mill; and / or, the temperature control device is arranged between two adjacent groups of rolling mills.

[0014] Optionally, in the above-mentioned rolling equipment for the clad metal composite plate, the temperature control device includes a frame, an alternating power supply and an induction coil, the alternating power supply and the induction coil are arranged on the frame, the induction coil and the alternating power supply are electrically connected, and the induction coil is used to surround the metal composite rod for heating; and / or, the temperature control device includes a box and a gas cooling device, the gas cooling device is arranged on the box, and is used to pass cooling gas into the box to cool the metal composite rod; and / or, the temperature control device includes a box and a water spray cooling device, the water spray cooling device is arranged on the box, and is used to spray cooling water into the box to cool the metal composite rod.

[0015] In a second aspect, the present invention provides a method for rolling a clad metal composite plate, using any of the above-mentioned rolling equipment for the clad metal composite plate, the rolling method comprising the following steps:

[0016] S100: Providing metal composite rod blanks;

[0017] S200: rolling and cladding the metal composite rod blank through a three-roller cross-rolling mill to obtain a metal composite rod;

[0018] S300: feeding the metal composite rod into a special-shaped rolling mill for special-shaped pre-rolling to obtain a metal composite rod with an elliptical cross-section;

[0019] S400: feeding the metal composite rod into a rolling mill and rolling the rod along a first rolling plane and a second rolling plane, respectively, to obtain a clad metal composite plate; wherein the first rolling plane and the second rolling plane are perpendicular;

[0020] S500: Repeat step S400 until a clad metal composite plate of target thickness is obtained.

[0021] Compared with the prior art, the present invention provides a rolling method for a clad metal composite plate. When preparing the clad metal composite plate, first, metal materials are selected and combined into a metal composite rod blank; then the metal composite rod blank is fed into a three-roller inclined rolling mill, and the three rolls are arranged at a specific inclination angle. Through radial pressure and axial friction, the metal composite rod blank is plastically deformed, and atoms diffuse to form a metallurgical bonding layer to obtain a bonded metal composite rod; then the metal composite rod is transferred to a special-shaped roller mill, and under friction and rolling force, the metal composite rod is rolled into an elliptical cross-section, increasing the width size, changing the internal stress distribution, and avoiding subsequent stress concentration at the edge of the rolling; then the elliptical metal composite rod is fed into the rolling mill for rolling on a first rolling plane and a second rolling plane. The first rolling is performed to extend the rod in the width direction and reduce the thickness. Then, a lateral extrusion pressure is applied to its side along a plane perpendicular to the previous rolling plane, so that the outer layer of metal is wrapped toward the center, the edge interface is closed, and the clad metal composite plate is obtained. Finally, the rolling of two mutually perpendicular planes is repeated, and the amount of reduction each time is precisely controlled, so that the thickness of the clad metal composite plate is gradually thinned to the target size. With this arrangement, the metallurgical bonding layer formed by the three-roller oblique rolling unit improves the composite quality, the special-shaped pre-rolling optimizes the rolling transition, reduces the stress concentration at the edge, and the cooperation of the two mutually perpendicular rolling planes can effectively thin the plate while also making the edge interface well closed. Multiple cycles of rolling ensure the dimensional accuracy and quality of the plate. Compared with the existing method of continuously deforming the clad blank and then longitudinally coating it on the outside of the core blank, then connecting the butt joints of the clad blank, and finally rolling it into a clad metal composite plate, the present application uses the metal composite rod obtained by rolling the three-roller oblique rolling unit to obtain a clad metal composite plate, which is not limited to the thickness of the clad blank and whether it is easy to bend and deform, and has a wider applicability.

[0022] Optionally, in the above-mentioned rolling method of the clad composite plate, after the metal composite rod billet is rolled and composited by a three-roller oblique rolling mill to obtain a metal composite rod, the metal composite rod is sent to a special-shaped roller mill for special-shaped pre-rolling to obtain a metal composite rod with an elliptical cross-section. The rolling method also includes: temperature controlling the metal composite rod.

[0023] Optionally, in the above-mentioned rolling method of the clad composite plate, feeding the metal composite rod into the special-shaped roller mill for special-shaped pre-rolling includes: feeding the metal composite rod into the special-shaped roller mill, and performing special-shaped pre-rolling through the special-shaped roller mill at a rolling speed greater than or equal to 3m / min and less than or equal to 8m / min.

[0024] Optionally, in the above-mentioned rolling method of the clad composite plate, the metal composite rod is fed into the rolling mill and rolled along the first rolling plane and the second rolling plane respectively to obtain the clad metal composite plate, which includes: feeding the metal composite rod into the rolling mill, and sequentially undergoing horizontal rolling and vertical rolling shaping to obtain the clad metal composite plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 Schematic diagram of the overall structure of a rolling equipment for a clad metal composite plate proposed in an embodiment of the present invention;

[0027] Figure 2 A simplified structural diagram of a rolling device for a clad metal composite plate proposed in an embodiment of the present invention;

[0028] Figure 3 A schematic structural diagram of a special-shaped roller mill for rolling equipment of a clad metal composite plate proposed in an embodiment of the present invention;

[0029] Figure 4 This is a schematic structural diagram of a special-shaped roller of a rolling equipment for a clad metal composite plate proposed in an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of deformation of a clad metal composite plate of a clad metal composite plate rolling equipment proposed in an embodiment of the present invention;

[0031] Figure 6 Schematic diagram of the relationship between the clad metal composite plate and the special-shaped rollers in different cycle rolling groups of a clad metal composite plate proposed in an embodiment of the present invention;

[0032] Figure 7 The figure is a flow chart of a rolling method of a clad metal composite plate proposed in an embodiment of the present invention.

[0033] Figure numerals: 1 is a three-roller cross-rolling mill, 2 is a cooling module, 3 is a heating module, 4 is a special-shaped roller mill, 41 is a coupling, 42 is a bearing seat, 43 is a special-shaped roller, 5 is a first two-roller mill, and 6 is a second two-roller mill. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined. "Several" means one or more, unless otherwise specifically defined.

[0037] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and may encompass internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0039] See also Figure 1 or Figure 2 The rolling equipment for the clad metal composite plate provided in an embodiment of the present invention includes: a three-roll cross-rolling mill, a special-shaped roll mill and multiple rolling mill groups; wherein the three-roll cross-rolling mill group is used to roll the metal composite rod blank into a metal composite rod; the special-shaped roll mill is arranged downstream of the three-roll cross-rolling mill group, and the working roll surface of the special-shaped roll mill has an inwardly concave roll surface, which is used to pre-roll the metal composite rod into an elliptical cross-section; multiple rolling mill groups are arranged downstream of the three-roll cross-rolling mill group in sequence along the rolling direction, each rolling mill group includes a first two-roll mill and a second two-roll mill, the first two-roll mill is used to roll the metal composite rod along a first rolling plane, and the second two-roll mill is used to roll the side shape of the clad metal composite plate along the second rolling plane, and the rolling planes of the second two-roll mill and the first two-roll mill are perpendicular.

[0040] It should be noted that the metal composite rod blank is composed of heterogeneous metal materials, specifically including a core layer and a cladding layer coaxially nested. The core layer is a solid metal core rod, the cladding layer is a hollow tubular metal cladding tube, and the initial cross-section of the metal composite rod blank is a circular cross-section.

[0041] For specific implementation: please refer to Figure 1 When rolling the clad metal composite plate, the metal composite rod blank is first placed in the three-roll cross-rolling mill 1. Under the rolling of the three-roll cross-rolling mill 1, atoms of the metal composite rod blank diffuse at the composite interface to form a metallurgical bonding layer to obtain a metal composite rod; then the metal composite rod enters the special-shaped rolling mill 4, and the concave roll surface of its working roll surface pre-rolls the metal composite rod to obtain a metal composite rod with an elliptical cross-section. The width direction dimension of the metal composite rod is increased, avoiding the edge stress concentration when directly rolled into a plate shape; then the metal composite rod enters the rolling mill, and is rolled on two mutually perpendicular planes by the first two-roll rolling mill 5 and the second two-roll rolling mill 6 in the rolling mill. The first two-roll rolling mill 5 thins it to the target size through the first rolling plane, and then enters the second two-roll rolling mill 6. The second two-roll rolling mill 6 applies lateral extrusion pressure on both sides of it through rolling on the second rolling plane, so that the outer layer of metal is wrapped toward the center and the edge interface is closed. Finally, the obtained clad metal composite plate is subjected to cyclic rolling by multiple rolling mills, wherein, Figure 5 As shown, Figure 5 The part in the dotted box is a multi-group cyclic rolling process, and the arrow is the direction of cyclic rolling, to obtain a clad metal composite plate of target thickness. In this way, by carrying out the coordinated operation of three-roll oblique rolling interface bonding, special-shaped pre-rolling to disperse stress, lateral extrusion to close the edge, and multi-pass cyclic rolling to strengthen the interface on the metal composite rod blank, a clad metal composite plate with good edge closure and high interface bonding strength is obtained, which reduces the cracking rate of the clad metal composite plate and improves the stability of the clad metal composite plate. Compared with the existing method of continuously deforming the clad blank and then longitudinally coating it on the outside of the core blank, then connecting the butt joints of the clad blank, and finally rolling it into a clad metal composite plate, the present application uses the metal composite rod obtained by rolling with a three-roll oblique rolling unit to obtain a clad metal composite plate, which is not limited to the thickness of the clad blank and whether it is easy to bend and deform, and has a wider applicability.

[0042] As a possible implementation, see Figure 3 and Figure 6 The concave roller surface of the special-shaped roller mill 4 is a concave arc roller surface, and the ratio of the curvature radius of the concave arc roller surface to the radius of the metal composite rod is greater than or equal to 1.05 and less than or equal to 1.80.

[0043] In a specific implementation, after the metal composite rod is initially composited by the three-roll cross-rolling mill 1, it is transferred to the profile roller 4 of the first group of the circulating rolling mill. At this time, the metal composite rod contacts the concave arc-shaped roller surface of the profile roller 4 and enters the profile roller 4. The curvature radius of the concave arc-shaped roller surface of the profile roller 4 is set to 1.05-1.80 times the radius of the metal composite rod, that is, the curvature radius of the concave arc-shaped roller surface can be any multiple between 1.05 and 1.80 times the radius of the metal composite rod, such as 1.05 times, 1.10 times, 1.20 times, 1.30 times, 1.40 times, and 1.80 times. This ratio range ensures that when the roller surface contacts the rod, the roller surface can provide sufficient friction to achieve stable engagement, while avoiding insufficient surface pressure due to too small a curvature or insufficient ovalization due to too large a curvature. After the metal composite bar completes its initial ovalization in the profile rolling mill 4, it enters the adjacent rolling mill along the rolling line for rolling, where its sides are subsequently rolled and shaped. This configuration ensures that the radius of curvature of the concave arc-shaped roller surface within the profile rolling mill 4 precisely matches the radius of the metal composite bar. While ensuring a certain degree of friction between the roller surface and the metal composite bar, it also avoids insufficient bite force caused by an excessively small radius of curvature or insufficient deformation caused by an excessively large radius of curvature, thus ensuring stability during the rolling process. Furthermore, the ovalization of the metal composite bar expands the bar widthwise, dispersing stress concentration at the edges during subsequent flat or vertical rolling, reducing stress peaks, lowering the edge cracking rate, and improving the edge closure rate.

[0044] It should be noted that if Figure 6 As shown, the direction indicated by the arrow is the rolling direction. In the case of multiple groups of special-shaped roller mills 4, the ratio of the curvature radius of the concave arc-shaped roller surface between different groups to the radius of the metal composite rod gradually increases along the rolling direction. With this arrangement, since the metal composite rods between different groups gradually become elliptical along the rolling direction, the gradually increasing radius ratio allows the concave arc-shaped roller surface to provide sufficient friction to achieve stable bite of the metal composite rod, and also avoids insufficient bite force due to too small curvature radius or insufficient deformation due to too large curvature radius, thereby ensuring stability during the rolling process.

[0045] As a possible implementation, the rolling equipment for the clad metal composite plate further includes at least one special-shaped roller mill 4, and the at least one special-shaped roller mill 4 is arranged between any two adjacent rolling mill groups.

[0046] In specific implementation, after the metal composite bar completes initial rolling in the preceding rolling mill, it is transferred to the profile rolling mill 4 located between the adjacent rolling mills. At this point, the concave curved roller surface of the additional profile rolling mill 4 contacts the metal composite bar. As the profiled rollers of the profile rolling mill 4 rotate, they engage and roll the metal composite bar. After rolling in the profile rolling mill 4, the metal composite bar forms an elliptical cross-section. By arranging multiple profile rolling mills 4 in series, the metal composite bar can undergo staged elliptical deformation between adjacent rolling steps. After the initial rolling, the profile rolling mill 4 processes the bar before it enters the next rolling mill for deformation rolling. With this arrangement, after multiple profile transitions, the widthwise elongation of the metal composite bar is precisely controlled within a certain range during each rolling pass, avoiding stress concentration caused by a single large deformation. The progressive deformation mechanism of the multi-stage profile roller mill 4 allows for smoother shape transitions between adjacent rolling mills, effectively dissipating stress peaks during edge rolling and further reducing edge cracking. At least one profile roller mill 4 is positioned between any two adjacent rolling mills, meaning that a profile roller mill 4 can be positioned between any two adjacent rolling mills. The rolling equipment for the clad metal composite plate also includes at least one profile roller mill 4, meaning that in addition to a profile roller mill 4 between the three-roller cross-rolling mill and the nearest rolling mill, at least one profile roller mill 4 is positioned between any adjacent rolling mills. It should be noted that the number of profile roller mills 4 between each adjacent rolling mill group can be one, or two or more profile roller mills 4 can be positioned based on actual production needs to better facilitate the processing of the metal composite rods between adjacent rolling mills, ensuring a smooth rolling process and improving product quality.

[0047] In some embodiments, the profiled rolling mill 4 includes a coupling 41, a bearing block 42, and a profiled roller 43. In the profiled rolling mill 4, the coupling 42 connects the drive motor and the shaft of the profiled roller 43. The bearing blocks 42 are located at both ends of the profiled roller 43 to support the shaft of the profiled roller 43 and reduce friction and vibration.

[0048] Furthermore, the curvature radius of the concave roller surface of the special-shaped rolling mill 4 gradually increases along the rolling direction.

[0049] Specifically, after the metal composite bar undergoes initial rolling in the three-roll cross-rolling mill 1, it sequentially passes through the profiled rolling mills 4 arranged along the rolling line. The radius of curvature of the concave roll surface of the profiled rolling mills 4 gradually increases along the rolling direction, forming a gradient arrangement. The initial additional rolling mills utilize a relatively small radius of curvature to ensure high contact pressure between the roll surface and the metal composite bar, thereby achieving stable engagement and sufficient initial widthwise ductile deformation. As the rolling process progresses, the radius of curvature of the subsequent additional rolling mills gradually increases, gradually reducing the contact area between the roll surface and the bar and the contact pressure. This maintains the necessary deformation guidance while avoiding surface damage or internal stress concentration caused by excessive local pressure.

[0050] In practice, the metal composite bar first enters the additional mill with the smallest radius of curvature. Its concave roller surface closely adheres to the bar, achieving full expansion of the edge material through a large initial reduction. As the bar is transported forward to subsequent mills with progressively larger curvature radii, the arc length of contact between the roller surface and the bar gradually decreases, and the reduction per pass simultaneously decreases. Thus, during the initial rolling phase, the mill with a smaller radius of curvature, through the high-engaging force of the profiled roller mill 4, effectively eliminates surface defects in the metal composite bar and smoothly engages the bar, ensuring smooth process flow. Subsequent mills with larger radiuses of curvature reduce the pressure per unit area, resulting in a more uniform distribution of width extension deformation. The increasing radius of curvature optimizes the stress distribution at the composite interface, promoting metallurgical bonding strength at the composite interface and ultimately improving the mechanical properties of the composite plate.

[0051] As a possible implementation, see Figure 1 The rolling equipment of the clad metal composite plate also includes a temperature control device, which is arranged between the three-roller cross-rolling mill group 1 and the first group of rolling mills; and / or, is arranged between each adjacent group of rolling mills.

[0052] Specifically, the temperature control device can be arranged between the three-roller cross-rolling mill group 1 and the first group of rolling mills, so as to control the temperature of the material after preliminary processing by the three-roller cross-rolling mill group 1 before entering the first group of rolling mills, to ensure that it enters the subsequent rolling process at an appropriate temperature; or it can be arranged between each adjacent group of rolling mills. When the temperature of the material changes after passing through one group of rolling mills, a temperature control device is arranged between the adjacent mills, which can accurately control the temperature of the material before entering the next group of mills, to ensure that the material temperature is appropriate throughout the rolling process; both settings can also be used at the same time to adjust the temperature of the material at all times during the entire rolling process to ensure the stability of rolling.

[0053] Furthermore, the temperature control device includes a frame, an alternating current power supply, and an induction coil, wherein the alternating current power supply and the induction coil are arranged on the frame, the induction coil and the alternating current power supply are electrically connected, and the induction coil is used to surround the metal composite rod for heating; and / or, the temperature control device includes a box and a gas cooling device, wherein the gas cooling device is arranged on the box and is used to pass cooling gas into the box to cool the metal composite rod;

[0054] And / or, the temperature control device includes a box body and a water spray cooling device, and the water spray cooling device is arranged on the box body and is used to spray cooling water to cool the surrounding area of ​​the metal composite rod.

[0055] During specific implementation, when the metal composite rod reaches the induction coil area, the alternating power supply electrically connected thereto works and applies an alternating current to the induction coil. The alternating current passes through the induction coil, thereby generating an alternating magnetic field. Since the metal composite rod is in the alternating magnetic field, according to the principle of electromagnetic induction, an induced current is generated inside the metal composite rod. In addition, the metal composite rod itself has resistance, so heat is generated on the metal composite rod. With such a setting, considering that the mechanical properties of different metal materials are different at different temperatures, heating the metal composite rod can improve the plasticity of the material and reduce its deformation resistance. When rolling some metals with higher hardness, heating to a suitable temperature can make it easier to ductile, making the rolling process smoother, reducing equipment losses, and extending service life. At the same time, using this induction coil and alternating power supply heating method, the induction heating speed is fast, and the metal composite rod can be quickly heated to a suitable rolling temperature, thereby improving production efficiency.

[0056] In some embodiments, the temperature control device comprises only a frame, an AC power supply, and an induction coil. The AC power supply and the induction coil are mounted on the frame and electrically connected to the AC power supply. The induction coil surrounds the metal composite rod and heats it. When rolling hard metals, heating to the appropriate temperature can make them more ductile, making the rolling process smoother, reducing equipment wear, and extending their service life.

[0057] In other embodiments, the temperature control device includes only a cooling device. The cooling device can have two different cooling modes: a housing and a gas cooling device, or a housing and a water spray cooling device. With this arrangement, when the temperature of the roll material becomes excessively high due to rolling friction, the cooling device can be operated to apply cooling water or cooling gas to the outer layer material to reduce its temperature and suppress its thermal expansion.

[0058] As an embodiment, the temperature control device is composed of a heating module 3, a cooling module 2 and a temperature sensor, wherein the heating module 3 includes a frame, an alternating power supply and an induction coil; the cooling module 2 includes a box and a gas cooling device, and the gas cooling device includes a plurality of cooling nozzles that can independently adjust the spraying of cooling medium. The cooling nozzles spray the cooling medium into the box to cool the metal composite rod passing through the box. The temperature sensor can use an infrared thermometer to detect the temperature distribution of the surface and core of the metal composite rod in real time. Through the cooperation of the heating module 3 and the cooling module 2, and the real-time temperature monitoring of the temperature sensor, precise temperature control of the metal composite rod is achieved.

[0059] The cooling module 2 includes a box body and a water spray cooling device. The water spray cooling device includes multiple groups of nozzles that can independently adjust the water spray volume. The nozzles spray cooling water into the box body to cool the temperature of the composite pipe passing through the box body. The temperature sensor can use an infrared thermometer to detect the temperature distribution of the surface and core of the composite pipe in real time. Through the cooperation of the induction heating module 3 and the water spray cooling module 2, as well as the real-time temperature monitoring of the temperature sensor, precise temperature control of the composite pipe can be achieved.

[0060] In some embodiments, the heating module 3 may also utilize a multi-group, zoned arrangement of heat radiating plates. These zones are positioned along the transport direction of the metal composite rod, enabling targeted radiant heating of different locations on the rod to further precisely control the rod's temperature. Specifically, after the metal composite rod undergoes initial lamination in the three-roll cross-rolling mill 1, it is transferred to the temperature control device. A temperature sensor determines the current temperature of the metal composite rod based on a preset temperature value. If the overall temperature of the metal composite rod is detected to be above a target threshold, the cooling module 2 is activated to spray a cooling medium (such as liquid nitrogen or water coolant) to cool it down. If the temperature of a specific region of the metal composite rod is detected to be too low, the corresponding group of heat radiating plates is activated to provide additional temperature. Furthermore, for metal composite rods with significantly different thermal expansion coefficients between the inner and outer composite materials, the temperature control device can adjust the temperature difference to achieve expansion equilibrium between the inner and outer materials, thereby reducing interfacial stress issues caused by the difference in thermal expansion coefficients. Specifically, if the outer layer of the metal composite rod becomes hotter than the core due to friction during rolling, the temperature control device controls the temperature based on the thermal expansion coefficient difference between the two materials. In the case where the thermal expansion coefficient of the outer layer material is higher than that of the core, the cooling module 2 is started to apply a cooling medium to the outer layer material to lower the temperature and suppress its thermal expansion, while applying radiant heat to the core to increase its thermal expansion, so that the expansion difference between the two approaches zero; conversely, if the thermal expansion coefficient of the core material is higher, the expansion balance is achieved by appropriately increasing the temperature of the outer layer.

[0061] In specific implementation, after the composite tube completes its initial forming process in the three-roll cross-rolling mill 1, it is transferred to the temperature control device area. The temperature sensor determines the current temperature state of the composite tube based on a preset temperature value. If the overall temperature of the composite tube is detected to be higher than the target threshold, the water spray cooling module 2 is activated to spray cooling water for cooling. If the temperature of a local area of ​​the composite tube is detected to be too low, the corresponding group of induction coils is activated to compensate for the temperature drop. Furthermore, for composite tubes with a large difference in the thermal expansion coefficients of the inner and outer composite materials, the temperature control device can also adjust the temperature difference to achieve expansion balance between the inner and outer materials to reduce interfacial stress problems caused by the difference in thermal expansion coefficients of the different materials. Specifically, when the outer layer of the composite tube becomes hotter than the core due to friction during rolling, the temperature control device performs temperature control based on the difference in thermal expansion coefficients of the two materials. In the case where the thermal expansion coefficient of the outer layer material is higher than that of the core, the water spray cooling module 2 is started to apply cooling water to the outer layer material to lower the temperature and suppress its thermal expansion, while applying induction heating to the core to increase its thermal expansion, so that the expansion difference between the two tends to zero; conversely, if the thermal expansion coefficient of the core material is higher, the expansion balance is achieved by appropriately increasing the temperature of the outer layer.

[0062] It should be noted that the output power of the alternating current power supply is adjustable and can be used for induction heating of different materials and at different temperatures.

[0063] Furthermore, the centerline of the induction coil coincides with the rolling centerline, placing the metal composite rod at the center of the induced magnetic field during rolling. This results in uniform heating across the entire rod, ensuring consistent plastic deformation across the rod during rolling. This avoids rolling defects caused by local temperature differences, thereby improving the quality of the resulting clad metal composite plate. This also facilitates stable entry of the metal composite rod into the induction coil, preventing interruptions to the rolling process due to errors and improving production efficiency.

[0064] In some embodiments, the number of rolling mills is four to eight groups. In specific implementation, the number of rolling mills is set to four to eight groups, which can be four, five, six, seven or eight groups, and are arranged in sequence along the rolling process. After the metal composite rods are initially compounded by the three-roller inclined rolling mill 1, they enter the multi-stage rolling mill in sequence for progressive deformation. For some composite materials with high interface bonding strength requirements, more rolling mills are used to disperse the total deformation of the metal into multiple process stages by increasing the number of rolling passes, thereby avoiding cracking caused by large reduction in a small number of passes. With this arrangement, the flexible setting of the number of rolling mills of four to eight groups can adapt to the material properties of different metal combinations, and adopt different rolling passes for metal materials of different hardness, thereby improving processing efficiency while ensuring that the material does not crack.

[0065] The working principle of the rolling equipment using the clad metal composite plate provided by the embodiment of the present invention is described below in a possible implementation manner, which is not specifically limited here.

[0066] The working principle is as follows: First, the metal composite rod blank is placed into the three-roll cross-rolling mill 1. Under the action of the three-roll cross-rolling mill 1, atoms of the metal composite rod blank diffuse at the composite interface, forming a metallurgical bonding layer, thus obtaining a metal composite rod. Subsequently, the metal composite rod enters the profile rolling mill 4. The working roll surface of the profile rolling mill 4 is a concave arc roll surface, and the ratio of its curvature radius to the radius of the metal composite rod is between 1.05 and 1.20. This design ensures that when the roll surface contacts the metal composite rod, it can provide sufficient friction for stable engagement, while also ensuring that the metal composite rod is rolled into an elliptical cross-section, increasing its width dimension, and effectively avoiding stress concentration at the edges during subsequent direct rolling into a plate shape. Next, the metal composite rod, pre-rolled by the profile rolling mill 4, enters the rolling mill. The rolling mill comprises a first two-roll mill 5 and a second two-roll mill 6, whose rolling planes are perpendicular to each other. The first two-roll mill 5 reduces the metal composite rod to the target thickness through the first rolling plane. The rod then enters the second two-roll mill 6, which applies lateral pressure on both sides of the rod through the second rolling plane, causing the outer metal layer to wrap toward the center and close the edge interface. The resulting clad metal composite plate then undergoes cyclic rolling through multiple rolling mills to further reduce the thickness to the target thickness. It should be noted that, in the configuration of the profiled roller mills 4, with the exception of the profiled roller mill 4 between the three-roll cross-rolling mill 1 and the first rolling mill, at least one profiled roller mill 4 is located between any two adjacent rolling mills. The radius of curvature of the concave roller surface of these profiled roller mills 4 gradually increases along the rolling direction. After initial rolling in the first rolling mill, the metal composite rod is transferred to the profiled roller mill 4 between the adjacent rolling mills. As the profiled rollers rotate, the metal composite rod is engaged and rolled, forming an elliptical cross-section. By arranging multiple sets of profiled rollers 4 in series, the metal composite rod undergoes staged ovalization deformation between adjacent rolling processes, precisely controlling the widthwise extension during each rolling pass. This avoids stress concentration caused by a single large deformation, resulting in a smoother shape transition and further reducing the edge cracking rate. Furthermore, a temperature control device is provided between the three-roller cross-rolling unit 1 and the first rolling unit. This temperature control device achieves heating via an induction coil and an alternating current power supply. When the metal composite rod reaches the induction coil area, the alternating current power supply applies an alternating current to the induction coil, generating an alternating magnetic field. This induces an induced current within the metal composite rod and generates heat due to resistance. The alternating current power supply is adjustable to meet the induction heating requirements of different materials and temperatures. The centerline of the induction coil coincides with the rolling centerline, ensuring uniform heating of the metal composite rod, avoiding rolling defects caused by local temperature differences, and improving the quality and production efficiency of the clad metal composite plate.Through the coordinated operation of the above devices, starting from the metal composite rod billet, it goes through the processes of three-roller oblique rolling interface bonding, special-shaped pre-rolling to disperse stress, lateral extrusion to close the edge, multi-pass cyclic rolling to strengthen the interface and precise temperature control, and finally obtains a clad metal composite plate with good edge closure and high interface bonding strength, which effectively reduces the cracking rate and improves stability.

[0067] See also Figure 7 The embodiment of the present invention further provides a method for rolling a clad metal composite plate, the method comprising the following steps:

[0068] S100: Providing metal composite rod blanks;

[0069] S200: rolling and cladding the metal composite rod blank through a three-roller cross-rolling mill unit 1 to obtain a metal composite rod;

[0070] S300: feeding the metal composite rod into the special-shaped rolling mill 4 for special-shaped pre-rolling to obtain a metal composite rod with an elliptical cross-section;

[0071] S400: feeding the metal composite rod into a rolling mill and rolling it through a first rolling plane and a second rolling plane respectively to obtain a clad metal composite plate; wherein the first rolling plane and the second rolling plane are perpendicular;

[0072] S500: Repeat step S400 until a clad metal composite plate of target thickness is obtained.

[0073] In practice, the metal materials are first selected and combined into a metal composite rod blank. The metal composite rod blank is then fed into a three-roller cross-rolling mill (1). The three rolls are arranged at a specific angle. Through radial pressure and axial friction, the metal composite rod blank undergoes plastic deformation, causing atomic diffusion to form a metallurgical bonding layer, resulting in a bonded metal composite rod. The metal composite rod is then transferred to a special-shaped rolling mill (4). Under friction and rolling forces, the metal composite rod is rolled into an elliptical cross-section, increasing its width and changing its internal stress distribution, thereby avoiding stress concentration at the edges during subsequent rolling. The elliptical metal composite rod is then fed into a rolling mill for rolling on a first rolling plane and then on a second rolling plane. The first rolling process stretches the rod in the width direction and reduces its thickness. Subsequently, a lateral extrusion force is applied to the sides perpendicular to the previous rolling plane, causing the outer metal layer to wrap toward the center and close the edge interface, resulting in a clad metal composite plate. Finally, the rolling process on the two perpendicular planes is repeated, with precise control of the reduction each time, until the thickness of the clad metal composite plate is gradually reduced to the target size. With such an arrangement, the metallurgical bonding layer formed by the three-roller cross-rolling unit 1 improves the composite quality, the special-shaped pre-rolling optimizes the rolling transition and reduces the stress concentration at the edge, and the cooperation of the two mutually perpendicular rolling planes effectively thins the plate while also making the edge interface well closed. Multiple cycles of rolling ensure the dimensional accuracy and quality of the plate. Compared with the existing method of continuously deforming the cladding blank and then longitudinally cladding it on the outside of the core blank, then connecting the butt joints of the cladding blank, and finally rolling it into a clad metal composite plate, the present application rolls the metal composite rod obtained by rolling the three-roller cross-rolling unit to obtain a clad metal composite plate, which is not limited to the thickness of the cladding blank and whether it is easy to bend and deform, and has a wider applicability.

[0074] As a possible implementation, see Figure 1 After the metal composite rod billet is rolled and composited through the three-roll cross-rolling mill 1 to obtain the metal composite rod, the metal composite rod is then fed into the profile rolling mill 4 for pre-profile rolling to obtain the metal composite rod with an elliptical cross-section. The rolling method further includes temperature control of the metal composite rod. The beneficial effects of temperature control of the metal composite rod have been described above and will not be further elaborated here.

[0075] As a possible implementation method, feeding the metal composite rod into the special-shaped roller mill 4 for special-shaped pre-rolling includes: feeding the metal composite rod into the special-shaped roller mill 4, and performing special-shaped pre-rolling through the special-shaped roller mill 4 at a rolling speed greater than or equal to 3m / min and less than or equal to 8m / min.

[0076] Specifically, the metal composite rod is fed into the profile rolling mill 4 and rolled at a transmission and rolling speed of 3 to 8 meters per minute. The rolling speed can be any speed between 3, 4, 5, or 8 meters per minute. This speed range ensures sufficient and stable contact between the metal composite rod and the concave curved roller surfaces of the profile rolling mill 4. At the appropriate speed, the rolling force and friction exerted by the rollers on the metal composite rod are more uniform, ensuring that the metal composite rod is rolled into the desired elliptical cross-section with higher dimensional accuracy. Cross-sectional deformation deviations caused by excessively high or low speeds are avoided, effectively preventing quality issues such as edge stress concentration and surface unevenness caused by inappropriate rolling speeds. Furthermore, controlling the rolling speed within this range ensures that the rolling speed is not too slow, thereby maintaining production efficiency.

[0077] As a possible implementation method, the metal composite rod is fed into the rolling mill and rolled through the first rolling plane and the second rolling plane respectively to obtain a clad metal composite plate, which includes: feeding the metal composite rod into the rolling mill, and sequentially undergoing horizontal rolling and vertical rolling shaping to obtain a clad metal composite plate.

[0078] First, the metal composite bar is fed into a rolling mill consisting of a first two-roll mill 5 for horizontal rolling and a second two-roll mill 6 for vertical rolling and shaping. The metal composite bar first enters the first two-roll mill 5. Under the rolling action of the two horizontally arranged rollers, the metal composite bar stretches in length and width, gradually reducing its thickness, ultimately forming a plate. The plate-shaped metal composite bar then enters the second two-roll mill 6, where the rollers are arranged vertically, applying lateral pressure along vertical planes on both sides of the bar. This lateral pressure shapes the sides, further wrapping the outer metal layer toward the center, gradually closing the edge interface and ultimately producing a clad metal composite plate. With this arrangement, horizontal rolling stretches the metal composite bar in length and width while simultaneously reducing the plate thickness, gradually approaching the target plate thickness. Vertical rolling shapes the sides, ensuring flatness and verticality, resulting in a more regular plate shape that meets production standards. Vertical rolling also applies lateral extrusion pressure to the sides, forcing the outer metal layer to wrap toward the center, effectively closing the edge interface, improving the edge bonding strength, reducing the probability of defects such as edge cracking, and enhancing the stability and reliability of the clad metal composite plate. By alternating horizontal and vertical rolling, the metal composite rod is subjected to pressure and deformation in different directions, effectively improving the comprehensive mechanical properties of the clad metal composite plate.

[0079] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0080] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A rolling equipment for clad metal composite plates, characterized in that: include: A three-roller cross-rolling mill, wherein the three-roller cross-rolling mill is used to roll the metal composite rod blank into the metal composite rod; A special-shaped rolling mill, the special-shaped rolling mill is arranged downstream of the three-roller cross-rolling mill group, the working roll surface of the special-shaped rolling mill has an inner concave roll surface, and is used to pre-roll the metal composite rod into an elliptical cross-section; Multiple groups of rolling mills are sequentially arranged downstream of the special-shaped rolling mill along the rolling direction, each group of the rolling mills includes a first two-roll rolling mill and a second two-roll rolling mill, the first two-roll rolling mill rolls the metal composite rod into a clad metal composite plate through a first rolling plane, and the second two-roll rolling mill rolls and shapes the side shape of the clad metal composite plate through a second rolling plane, and the first rolling plane and the second rolling plane are perpendicular.

2. The rolling equipment for clad metal composite plates according to claim 1, characterized in that: The concave roller surface of the special-shaped rolling mill is a concave arc-shaped roller surface, and the ratio of the curvature radius of the concave arc-shaped roller surface to the radius of the metal composite rod is greater than or equal to 1.05 and less than or equal to 1.

80.

3. The rolling equipment for clad metal composite plates according to claim 2, characterized in that: The special-shaped roller mill is also arranged between two adjacent groups of the rolling mills.

4. The rolling equipment for clad metal composite plates according to claim 3, characterized in that: The curvature radius of the concave roller surfaces of the plurality of special-shaped rolling mills gradually increases along the conveying direction of the metal composite rod.

5. The rolling equipment for clad metal composite plates according to claim 1, characterized in that: The rolling equipment for the clad metal composite plate further includes a temperature control device, which is arranged between the three-roller cross-rolling mill and the special-shaped rolling mill; and / or, the temperature control device is arranged between two adjacent groups of the rolling mills.

6. The rolling equipment for clad metal composite plates according to claim 5, characterized in that: The temperature control device includes a frame, an alternating current power supply, and an induction coil. The alternating current power supply and the induction coil are arranged on the frame. The induction coil and the alternating current power supply are electrically connected. The induction coil is used to surround the metal composite rod for heating. And / or, the temperature control device includes a box and a gas cooling device, wherein the gas cooling device is provided on the box and is used to pass cooling gas into the box to cool the metal composite rod; And / or, the temperature control device includes a box and a water spray cooling device, and the water spray cooling device is arranged on the box and is used to spray cooling water into the box to cool the metal composite rod.

7. A method for rolling a clad metal composite plate, characterized in that: The rolling equipment for the clad metal composite plate according to any one of claims 1 to 6 is used, and the rolling method comprises the following steps: S100: Providing metal composite rod blanks; S200: rolling and cladding the metal composite rod blank through a three-roller cross-rolling mill to obtain a metal composite rod; S300: sending the metal composite rod to a special-shaped rolling mill for special-shaped pre-rolling to obtain the metal composite rod with an elliptical cross-section; S400: feeding the metal composite rod into a rolling mill and rolling the rod through a first rolling plane and a second rolling plane, respectively, to obtain a clad metal composite plate; wherein the first rolling plane and the second rolling plane are perpendicular; S500: Repeat step S400 until the clad metal composite plate of target thickness is obtained.

8. The rolling method of the clad metal composite plate according to claim 7, characterized in that: After the metal composite rod blank is rolled and composited through a three-roller cross-rolling mill to obtain a metal composite rod, and before the metal composite rod is sent to a special-shaped roller mill for special-shaped pre-rolling, the rolling method further includes: temperature controlling the metal composite rod.

9. The rolling method of the clad metal composite plate according to claim 7, characterized in that: The sending of the metal composite rod into the special-shaped rolling mill for special-shaped pre-rolling includes: sending the metal composite rod into the special-shaped rolling mill, and performing special-shaped pre-rolling through the special-shaped rolling mill at a rolling speed greater than or equal to 3m / min and less than or equal to 8m / min.

10. The rolling method of the clad metal composite plate according to claim 7, characterized in that: The step of feeding the metal composite rod into a rolling mill and rolling the rod through a first rolling plane and a second rolling plane to obtain a clad metal composite plate comprises: feeding the metal composite rod into a rolling mill and sequentially performing horizontal rolling and vertical rolling shaping to obtain a clad metal composite plate.

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