Equipment and method for preparing metal composite thin strip through prefabricated mechanical meshing and electric field treatment

Abstract

The invention belongs to the technical field of metal material composite forming, and particularly relates to equipment and a method for preparing a metal composite thin strip through prefabricated mechanical meshing and electric field treatment. The equipment for preparing the metal composite thin strip through prefabricated mechanical meshing and electric field treatment comprises an uncoiling unit, a guide roller set, a movable pressing roller set, an electric field treatment unit, a cooling unit, a resistance detection unit and a coiling unit which are sequentially arranged in a box body. A gas cylinder and a control console are arranged outside the box body, and the control console is used for controlling the uncoiling unit, the movable compression roller set, the electric field processing unit, the cooling unit and the coiling unit to work and receiving resistance signals of the resistance detection unit; according to the method, mechanical meshing is prefabricated on the interface of the metal thin strip, and electric field treatment is combined, so that the interface bonding strength of the metal composite thin strip can be remarkably improved. And through the synergistic effect of interface mechanical meshing and atomic migration under electric field driving, an interface connection mechanism is effectively optimized, and the bottleneck of a traditional solid-state composite technology in the aspects of bonding strength and process controllability is broken through.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of metal material composite forming, and particularly relates to an equipment and method for preparing a metal composite thin strip through pre-assembly mechanical engagement and electric field treatment. BACKGROUND

[0002] A metal composite thin strip is a layered structure material formed by combining two or more different metal materials through a specific process, which integrates the excellent properties of each component metal, such as electrical conductivity, thermal conductivity, corrosion resistance, mechanical strength, etc. In the field of electronic information, it can be used to prepare high-frequency device substrates and lithium-ion battery current collectors; in the field of aerospace, it can be used as a lightweight structural material; in the field of energy, it can be used for fuel cell bipolar plates, etc., and has irreplaceable application value. With the development of some industries, higher requirements are put forward for the interface bonding strength, dimensional accuracy, surface quality, etc. of the metal composite thin strip.

[0003] Rolling composite requires high equipment, and the interface bonding strength is greatly affected by rolling process parameters. Generally, a larger reduction is required, resulting in more rolling passes and a longer preparation period. In addition, with the research and development of new metal thin strip materials such as nanocrystalline and amorphous, it is increasingly difficult for traditional processes to control interface grain growth and suppress brittle phase precipitation. In the existing improved technology, ultrasonic vibration assisted composite improves the interface contact by introducing high frequency mechanical vibration, but the energy penetration depth is low, and the effect of atomic activation on the thin strip interface is limited. The brazing technology fills the gap between dissimilar metal thin layers by melting low melting point filler metal, and forms a metallurgical bond by using the metallurgical reaction between the filler metal and the base metal. However, brazing technology has very high requirements for surface pretreatment and the interface is prone to form brittle phases, reducing mechanical properties. Therefore, there is an urgent need for a new process that can strengthen the interface from mechanical engagement and atomic diffusion on multiple scales, and the treatment process is a solid-state connection. SUMMARY

[0004] The present application provides an equipment and method for preparing a metal composite thin strip through pre-assembly mechanical engagement and electric field treatment to solve the above problems.

[0005] To achieve the above purpose, the present application adopts the following technical scheme: The equipment for preparing a metal composite thin strip through pre-assembly mechanical engagement and electric field treatment comprises an unwinding unit, a guide roller group, a dynamic pressure roller group, an electric field treatment unit, a cooling unit, a resistance detection unit and a winding unit arranged in the box in sequence; a gas cylinder and a control console are arranged outside the box, the control console is used to control the work of the unwinding unit, the dynamic pressure roller group, the electric field treatment unit, the cooling unit and the winding unit, and is used to receive the resistance signal of the resistance detection unit; The electric field processing unit comprises a processing box, a gap is formed on the left and right sides of the processing box for passing the metal composite thin strip, a sliding groove is formed on the left side of the top wall and the right side of the bottom plate of the processing box, a sliding block is slidably arranged in the sliding groove, a telescopic cylinder is fixedly connected to one side of the sliding block, the cylinder body of the telescopic cylinder is fixed on the side wall of the processing box for driving the sliding block to move, a mounting seat is fixed on the sliding block, a clamping groove is formed on the mounting seat, an electrode is clamped in the clamping groove, the electrode is connected with a power supply through a connecting line, the power supply is electrically connected with a control console, a pressure sensor is installed in the clamping groove, the pressure sensor is located between the mounting seat and the electrode, the pressure sensor is electrically connected with the control console for detecting the pressure applied by the metal composite thin strip to the electrode, temperature measuring instruments are arranged above and below the metal composite thin strip for measuring the temperature on the upper and lower sides of the metal composite thin strip, the temperature measuring instruments are fixed on the top wall or the bottom plate of the processing box, the temperature measuring instruments are located between the two electrodes, the temperature measuring instruments are electrically connected with the control console, and the gas cylinder is communicated with the processing box through a pipeline for introducing inert gas into the processing box.

[0006] Further, the unwinding unit comprises two unwinding devices arranged in an up-down manner and respectively used for unwinding different metal strips.

[0007] Further, the guide roller set comprises three guide rollers arranged in an up-down staggered manner.

[0008] Further, the dynamic pressure roller set is used for preliminarily mechanically engaging the two metal thin strips.

[0009] Further, the cooling unit is a air cooling device arranged below the metal composite thin strip for air cooling the metal composite thin strip.

[0010] Further, the guide roller, the processing box, and the upper and lower pressure rollers in the dynamic pressure roller set are all made of insulating ceramic material; and the electrode is made of copper-titanium alloy.

[0011] The method for preparing a metal composite thin strip through preliminary mechanical engagement and electric field processing comprises the following steps: S1, surface polishing treatment is performed on two metal thin strips with the same width and different materials, specifically, first, rough polishing is performed by using a steel wire brush to expose a fresh metal layer of the metal thin strip, and then fine sandpaper is used to polish along the length direction of the metal thin strip to eliminate deep scratches left by the rough polishing and make the surface texture uniform; the polished metal thin strips are wound and respectively installed on two unwinding devices; S2, the two unwinding devices are controlled to work synchronously by the control console, so that the two metal thin strips are released synchronously and transmitted to the guide roller set to ensure that the two metal thin strips are aligned in a stacked manner; S3, the metal thin strip of the laminated alignment is guided into the dynamic pressure roller group, the plastic deformation of the metal thin strip is caused by the pressure of the dynamic pressure roller group, the preliminary mechanical engagement of the composite interface of the two metal thin strips is caused, and the preliminary composite metal composite thin strip is formed; S4, the inert gas is introduced into the electric field processing unit, the inert characteristics are used to build a protective atmosphere, and metal oxidation is prevented at high temperature; S5, the power supply is turned on, the metal composite thin strip is powered on, the continuous temperature control composite processing of the composite interface of the metal composite thin strip is realized, and the current fluctuation form is closed loop controlled by the control console; the temperature change is monitored in real time during the power-on processing, so that the temperature of the metal composite thin strip is ensured to be in the set range; at the same time, the electrode is moved by the control of the control console, the electric field processing area is accurately controlled, and then the selected area processing of the electric field is realized; S6, the cooling unit is turned on, the completed metal composite thin strip is quickly and uniformly cooled by strong cold wind, and then overheating damage is prevented, and the thermal stress is relieved, so that the size accuracy and interface integrity are stable; S7, the resistance of the metal composite thin strip is detected by the resistance detection unit, and then the resistivity of the metal composite thin strip is calculated, and the bonding state of the metal composite thin strip is determined according to the resistivity of the metal composite thin strip; S8, the metal composite thin strip is wound by the winding unit, and the tension of the metal composite thin strip is applied by adjusting the rotating speed of the winding unit.

[0012] Further, the width of the metal thin strip in S1 is 10-150mm; the mesh number of the fine sandpaper is 1200 meshes, the motor speed of the unwinding device in S2 is 30-70RPM, and the reduction rate of the dynamic pressure roller group in S3 is 20-50%.

[0013] Further, in S5, the peak current of the power supply is 200-650A, the duty cycle is 20-100%, the frequency is 800-1500Hz, the power supply is a pulse power supply, and the temperature setting range of the metal composite thin strip is 200-850℃.

[0014] Further, in S8, the motor speed of the winding unit is 30-70RPM, and the tension applied is 10-50N.

[0015] Compared with the prior art, the present application has the following advantages: (1) improve the interface bonding strength and surface topography By pre-preparing mechanical engagement at the interface of the metal thin strip and combining with electric field treatment, the interface bonding strength of the metal composite thin strip can be significantly improved. Compared with other treatment methods such as welding, rolling composite and the like, the treatment speed can be obviously improved by electric field treatment, the deformation amount is reduced, the edge crack defect is obviously reduced, the electric field parameters can be precisely closed-loop controlled, and the plate shape and surface quality are easier to control. Through the synergistic effect of the interface mechanical engagement and the atomic migration under the electric field driving, the interface connection mechanism is effectively optimized, the technical bottleneck of the traditional solid-state composite technology in the bonding strength and process controllability is broken through, and a new technical path is provided for efficient and controllable preparation of high-performance metal composite thin strips.

[0016] (2) Improve the performance of the organization The effect of the electric field can refine the grain structure of the metal composite thin strip, homogenize the structure, thereby improving the mechanical properties of the composite thin strip such as strength, toughness, ductility and the like, so that it can better meet the use requirements in different fields.

[0017] (3) Improve production efficiency The pre-prepared mechanical engagement and electric field treatment provided by the application can realize efficient production of the metal composite thin strip, greatly shorten the treatment time, improve the production efficiency, reduce the production cost, and be beneficial to large-scale industrial production.

[0018] (4) Energy saving and environmental protection Compared with the traditional treatment process, the electric field treatment does not need a large amount of heat energy input, and the energy consumption is low during the treatment process, and the emission of pollutants such as waste gas and waste water is reduced, and has good energy saving and environmental protection effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of the application; Figure 2 is a structural schematic diagram of the electric field treatment unit of the application; Figure 3 is a structural schematic diagram of the mounting seat of the application; Figure 4 is a process flow diagram of the application; Figure 5 is an SEM diagram of the stainless steel side after stripping of the copper / stainless steel metal composite thin strip prepared by mechanical engagement treatment; Figure 6 is an SEM diagram of the stainless steel side after stripping of the copper / stainless steel metal composite thin strip prepared by mechanical engagement + heat treatment; Figure 7 is an SEM diagram of the stainless steel side after stripping of the copper / stainless steel metal composite thin strip prepared by the embodiment 1 of the application; Figure 8Image of the bonding interface morphology of copper / stainless steel composite strips prepared by mechanical meshing treatment; Figure 9 The interface morphology of copper / stainless steel composite strips prepared by mechanical meshing and heat treatment; Figure 10 This is a morphology diagram of the bonding interface of the copper / stainless steel metal composite strip prepared in Example 1 of the present invention. Figure 11 A comparison of the peel strength of copper / stainless steel composite strips prepared under three modes: mechanical meshing treatment, mechanical meshing + heat treatment, and mechanical meshing + electric field treatment. Figure 12 Stress-strain curves of copper / stainless steel composite strips prepared under three modes: mechanical meshing treatment, mechanical meshing + heat treatment, and mechanical meshing + electric field treatment. In the diagram, 1 is the housing, 2 is the unwinding unit, 3 is the guide roller group, 4 is the dynamic pressure roller group, 5 is the electric field processing unit, 6 is the cooling unit, 7 is the resistance detection unit, 8 is the winding unit, 9 is the gas cylinder, 10 is the control console, 501 is the processing box, 502 is the notch, 503 is the slide groove, 504 is the slider, 505 is the telescopic cylinder, 506 is the mounting base, 507 is the slot, 508 is the electrode, 509 is the power supply, 510 is the pressure sensor, and 511 is the temperature measuring instrument. Detailed Implementation

[0020] To further illustrate the technical solution of the present invention, the present invention will be further described below through embodiments. Example 1

[0021] like Figures 1 to 4 As shown, the equipment for preparing metal composite strips by prefabrication of mechanical meshing and electric field treatment includes an unwinding unit 2, a guide roller group 3, a dynamic pressure roller group 4, an electric field treatment unit 5, a cooling unit 6, a resistance detection unit 7, and a winding unit 8 arranged sequentially inside a housing 1. The front end of the housing 1 is an open structure. A gas cylinder 9 and a control console 10 are arranged outside the housing 1. The control console 10 is used to control the operation of the unwinding unit 2, the dynamic pressure roller group 4, the electric field treatment unit 5, the cooling unit 6, and the winding unit 8, and to receive the resistance signal from the resistance detection unit 7. The uncoiling unit 2 includes two uncoiling devices arranged vertically, which are used to uncoil different metal strips respectively. The guide roller group 3 includes three guide rollers, which are arranged in an alternating vertical arrangement. The dynamic pressure roller group 4 is used to perform preliminary mechanical engagement of the two metal strips; The electric field processing unit 5 comprises a processing box 501, a gap 502 is formed on the left and right sides of the processing box 501 for passing the metal composite strip, a sliding groove 503 is formed on the left side of the top wall and the right side of the bottom plate of the processing box 501, a sliding block 504 is slidably arranged in the sliding groove 503, a telescopic cylinder 505 is fixedly connected to one side of the sliding block 504, the cylinder body of the telescopic cylinder 505 is fixed on the side wall of the processing box 501 for driving the sliding block 504 to move, a mounting seat 506 is fixed on the sliding block 504, a clamping groove 507 is formed in the mounting seat 506, and an electrode 508 is clamped in the clamping groove 507, the electrode 508 is connected with a power supply 509 through a connecting wire, the power supply 509 is electrically connected with a control console 10, a pressure sensor 510 is installed in the clamping groove 507, the pressure sensor 510 is located between the mounting seat 506 and the electrode 508, the pressure sensor 510 is electrically connected with the control console 10 for detecting the pressure applied by the metal composite strip to the electrode 508, temperature measuring instruments 511 are arranged above and below the metal composite strip for measuring the temperature on the upper and lower sides of the metal composite strip, the temperature measuring instruments 511 are fixed on the top wall or the bottom plate of the processing box 501, the temperature measuring instruments 511 are located between the two electrodes 508, the temperature measuring instruments 511 are electrically connected with the control console 10, and the gas cylinder 9 is communicated with the processing box 501 through a pipeline for introducing inert gas into the processing box 501. The cooling unit 6 is a air cooling device arranged below the metal composite strip for air cooling the metal composite strip.

[0022] The guide rollers, the processing box 501 and the upper and lower pressure rollers in the dynamic pressure roller group 4 are all made of insulating ceramic material, and the material of the electrode 508 is copper-titanium alloy.

[0023] The method for preparing the metal composite strip by pre-mechanical engagement and electric field processing comprises the following steps: S1, surface polishing treatment is performed on two metal strips with the same width and different materials, specifically, first, rough polishing is performed by using a steel wire brush to expose a fresh metal layer of the metal strip, and then fine sandpaper is used to polish along the length direction of the metal strip to eliminate deep scratches left by rough polishing and make the surface texture uniform; the polished metal strips are wound and respectively installed on two uncoiling devices; S2, the two uncoiling devices are controlled to work synchronously by the control console 10, so that the two metal strips are released synchronously and transmitted to the guide roller group 3 to ensure that the two metal strips are aligned in the stack; S3, the metal strips aligned in the stack are guided into the dynamic pressure roller group 4, and the metal strips are plastically deformed by the pressure of the dynamic pressure roller group 4 to preliminarily mechanically engage the composite interface of the two metal strips to form a preliminarily compounded metal composite strip; S4, inert gas is introduced into the electric field processing unit 5, and a protective atmosphere is constructed by using the inert property thereof to prevent metal oxidation at high temperatures; S5, the power supply 509 is turned on, the metal composite thin strip is powered on, the continuous temperature control composite processing of the composite interface of the metal composite thin strip is realized, and the current fluctuation form is closed loop controlled by the control console 10; the temperature change is monitored in real time during the power-on processing, so that the temperature of the metal composite thin strip is ensured to be within the set range; at the same time, the control console 10 controls the telescopic cylinder 505 to drive the electrode 508 to move, so as to accurately control the electric field processing area, and then realize the selected area processing of the electric field; S6, the cooling unit 6 is turned on, the metal composite thin strip after the completion of the composite is quickly and uniformly cooled by strong cold wind, so as to prevent overheating damage and relieve thermal stress, and stabilize the size accuracy and interface integrity; S7, the resistance of the metal composite thin strip is detected by the resistance detection unit 7, and then the resistivity of the metal composite thin strip is calculated, and the bonding state of the metal composite thin strip is determined according to the resistivity of the metal composite thin strip; S8, the metal composite thin strip is wound by the winding unit 8, and the tension of the metal composite thin strip is applied by adjusting the rotating speed of the winding unit 8.

[0024] In the embodiment, the two metal thin strips are copper thin strips and stainless steel thin strips respectively, the width of the strip is 60mm, the mesh number of the fine sandpaper in S1 is 1200 meshes, the rotating speed of the motor of the unwinding device in S2 is 50RPM, the rolling reduction of the dynamic pressure roller group 4 in S3 is 35%, the power supply 509 in S5 is a pulse power supply, the peak current of the power supply 509 is 400A, the duty ratio is 50%, the frequency is 1000Hz, and the temperature setting range of the metal composite thin strip is 520~550℃; the rotating speed of the motor of the winding unit 8 in S8 is 50RPM, and the applied tension is 30N.

[0025] Comparison Figure 5 , Figure 6 , Figure 7 It can be known that the interface bonding strength of the copper / stainless steel metal composite thin strip prepared by the mechanical engagement+electric field processing process of the present application is much greater than that of the copper / stainless steel metal composite thin strip prepared by mechanical engagement processing and mechanical engagement+heat treatment; comparison Figure 8 , Figure 9 , Figure 10 It can be known that the interface bonding quality of the copper / stainless steel metal composite thin strip prepared by the mechanical engagement+electric field processing process of the present application is much greater than that of the copper / stainless steel metal composite thin strip prepared by mechanical engagement processing and mechanical engagement+heat treatment; as Figure 11As shown, the peeling strength of the copper / stainless steel metal composite thin strip prepared by the mechanical engagement + electric field treatment process of the application is much greater than that of the copper / stainless steel metal composite thin strip prepared by mechanical engagement treatment and mechanical engagement + heat treatment. Figure 12 As shown, the mechanical properties of the copper / stainless steel metal composite thin strip prepared by the mechanical engagement + electric field treatment process of the application are much better than those of the copper / stainless steel metal composite thin strip prepared by mechanical engagement treatment and mechanical engagement + heat treatment. It can be seen that the preparation of the copper / stainless steel metal composite thin strip is realized by mechanical engagement + electric field treatment, and the interface morphology is obviously improved. Example 2

[0026] In this embodiment, the two metal thin strips are copper thin strips and titanium thin strips respectively, the strip width is 10mm, the grit number of the fine sandpaper in S1 is 1200, the motor speed of the unwinding device in S2 is 30RPM, the reduction of the dynamic pressure roller group 4 in S3 is 20%, the peak current of the power supply 509 is 200A, the duty cycle is 20%, the frequency is 800Hz, and the temperature setting range of the metal composite thin strip is 200-230℃; the motor speed of the winding unit 8 in S8 is 30RPM, and the applied tension is 10N. Example 3

[0027] In this embodiment, the two metal thin strips are aluminum thin strips and stainless steel thin strips respectively, the strip width is 150mm, the grit number of the fine sandpaper in S1 is 1200, the motor speed of the unwinding device in S2 is 70RPM, the reduction of the dynamic pressure roller group 4 in S3 is 50%, the peak current of the power supply 509 is 650A, the duty cycle is 100%, the frequency is 1500Hz, and the temperature setting range of the metal composite thin strip is 800-850℃; the motor speed of the winding unit 8 in S8 is 70RPM, and the applied tension is 50N.

[0028] The main features and advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0029] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. An apparatus for preparing a metal composite strip by mechanical interlocking and electric field treatment, characterized in that: The box (1) is provided with a gas cylinder (9) and a control console (10) outside the box (1), the control console (10) is used for controlling the unwinding unit (2), the dynamic pressure roller group (4), the electric field processing unit (5), the cooling unit (6) and the winding unit (8) to work, and is used for receiving the resistance signal of the resistance detection unit (7); The electric field processing unit (5) comprises a processing box (501), notches (502) are formed in the left and right sides of the processing box (501) and are used for passing through the metal composite thin strip, a sliding groove (503) is formed in the left side of the top wall and the right side of the bottom plate of the processing box (501), a sliding block (504) is slidably arranged in the sliding groove (503), a telescopic cylinder (505) is fixedly connected to one side of the sliding block (504), the cylinder body of the telescopic cylinder (505) is fixed on the side wall of the processing box (501) and is used for driving the sliding block (504) to move, a mounting seat (506) is fixed on the sliding block (504), a clamping groove (507) is formed in the mounting seat (506), an electrode (508) is clamped in the clamping groove (507), the electrode (508) is connected with a power supply (509) through a connecting line, the power supply (509) is electrically connected with the control console (10), a pressure sensor (510) is arranged in the clamping groove (507), the pressure sensor (510) is located between the mounting seat (506) and the electrode (508), the pressure sensor (510) is electrically connected with the control console (10) and is used for detecting the pressure applied by the metal composite thin strip to the electrode (508), temperature measuring instruments (511) are arranged above and below the metal composite thin strip, so that the temperatures on the upper side and the lower side of the metal composite thin strip are measured, the temperature measuring instruments (511) are fixed on the top wall or the bottom plate of the processing box (501), the temperature measuring instruments (511) are located between the two electrodes (508), the temperature measuring instruments (511) are electrically connected with the control console (10), and the gas cylinder (9) is communicated with the processing box (501) through a pipeline and is used for introducing inert gas into the processing box (501).

2. The apparatus for preparing metal composite thin strip by mechanical engagement and electric field treatment according to claim 1, characterized in that: The unwinding unit (2) comprises two unwinding devices arranged in an up-down mode and is used for unwinding different metal strips.

3. The apparatus for preparing metal composite thin strip by mechanical engagement and electric field treatment according to claim 2, characterized in that: The guiding roller group (3) comprises three guiding rollers which are arranged in an up-down staggered mode.

4. The apparatus for preparing metal composite thin strip by mechanical engagement and electric field treatment according to claim 3, characterized in that: The dynamic pressure roller group (4) is used for preliminarily mechanically engaging the two metal thin strips.

5. The apparatus for preparing metal composite thin strip by mechanical engagement and electric field treatment according to claim 4, characterized in that: The cooling unit (6) is a wind cooling device arranged below the metal composite thin strip and is used for air cooling the metal composite thin strip.

6. The apparatus for preparing metal composite strip by mechanical engagement and electric field treatment according to claim 5, wherein: The guiding roller, the processing box (501) and the upper and lower pressure rollers in the dynamic pressure roller group (4) are all made of insulating ceramic material, and the electrode (508) is made of copper-titanium alloy.

7. A method for manufacturing a metal composite thin strip by a preform mechanical engagement and electric field treatment, based on the apparatus for manufacturing a metal composite thin strip by a preform mechanical engagement and electric field treatment according to claim 6, characterized in that: The method comprises the following steps: S1, the same bandwidth, different materials of two metal thin strips are surface polished, specifically: first, rough polishing is performed by using a steel wire brush to expose a fresh metal layer of the metal thin strip, and then fine sandpaper is used to polish along the length direction of the metal thin strip in a straight line to eliminate deep scratches left by rough polishing and make the surface texture uniform; the polished metal thin strips are wound and respectively installed on two uncoiling devices; S2, the two uncoiling devices are controlled to work through a control console (10), so that the two metal thin strips are synchronously released and conveyed to a guide roller group (3) to ensure that the two metal thin strips are aligned in a stack; S3, the metal thin strips aligned in the stack are guided into a dynamic pressure roller group (4), plastic deformation of the metal thin strips is caused by the pressure of the dynamic pressure roller group (4), the two metal thin strips are preliminarily mechanically engaged at a composite interface, and a preliminarily compounded metal composite thin strip is formed; S4, inert gas is introduced into an electric field processing unit (5) to build a protective atmosphere by using the inert property to prevent oxidation of the metal at high temperature; S5, a power supply (509) is turned on to electrify the metal composite thin strip, continuous temperature control processing of the composite interface of the metal composite thin strip is realized, and current fluctuation patterns are closed-loop controlled through the control console (10); temperature changes are monitored in real time during the electrification processing to ensure that the temperature of the metal composite thin strip is within a set range; at the same time, the control console (10) controls a telescopic cylinder (505) to drive an electrode (508) to move to accurately control an electric field processing area, and then selective processing of the electric field is realized; S6, a cooling unit (6) is turned on to rapidly and uniformly cool the completed metal composite thin strip by strong cold wind to prevent overheating damage and at the same time to relieve thermal stress and stabilize the dimensional accuracy and interface integrity; S7, the resistance of the metal composite thin strip is detected through a resistance detection unit (7) to calculate the resistivity of the metal composite thin strip, and the bonding state of the metal composite thin strip is determined according to the resistivity of the metal composite thin strip; S8, the metal composite thin strip is wound by using a winding unit (8), and a tension is applied to the metal composite thin strip by adjusting the rotating speed of the winding unit (8).

8. The method of claim 7, wherein the method further comprises: The bandwidth of the metal thin strip in S1 is 10-150 mm; the mesh number of the fine sandpaper is 1200 meshes; the motor speed of the uncoiling device in S2 is 30-70 RPM; and the pressure reduction rate of the dynamic pressure roller group (4) in S3 is 20-50%.

9. The method of claim 7, wherein the method further comprises: The peak current of the power supply (509) in S5 is 200-650 A, the duty ratio is 20-100%, the frequency is 800-1500 Hz, the power supply (509) is a pulse power supply, and the temperature setting range of the metal composite thin strip is 200-850℃.

10. The method of claim 7, wherein the method further comprises: The motor speed of the winding unit (8) in S8 is 30-70 RPM, and the tension applied is 10-50 N.

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