A kind of copper-aluminum composite strip rolling precision current conduction wrap angle device containing sand blasting treatment

Abstract

The present application belongs to the technical field of metal composite material processing equipment, and particularly relates to a copper-aluminum composite thin strip rolling precise current transmission included angle device with sand blasting treatment, which comprises a coiler, an insulating roller and upper and lower symmetrically arranged current transmission deflection rollers; the current transmission deflection roller comprises a first roller shaft and a plurality of conductive sections coaxially sleeved on the first roller shaft in the axial direction, an insulating section is arranged between adjacent conductive sections, and a closed chamber is arranged in the insulating section; a central through hole and an independent medium channel are arranged in the first roller shaft, the medium channel is communicated with the closed chamber of the insulating section through a radial through hole, a bearing and a brush assembly are arranged in the conductive section, and a PLC control system is further arranged; the PLC control system controls the conductive medium in the closed chamber of the insulating section within the strip width range and controls the insulating medium in the closed chamber of the insulating section outside the strip width range. The present application can solve the problems of uncontrollable conductive area, easy current leakage, poor current transmission stability and inability to adaptively adjust in the prior art.

Description

Technical Field

[0001] This invention belongs to the technical field of metal composite material processing equipment, and particularly relates to a precision electric wrapping device for rolling copper-aluminum composite thin strip with sandblasting treatment. Background Technology

[0002] In the rolling process of copper-aluminum composite strips, pulsed current-assisted rolling (EACP) technology can significantly reduce rolling force, refine grains, and promote atomic diffusion at the interface of dissimilar metals. This is an effective way to solve the bonding difficulties caused by the large differences in physical properties between copper and aluminum. Existing energizing methods mostly use integral conductive rollers as guide rollers, introducing current through direct contact between the roller surface and the strip. However, this traditional structure has significant drawbacks in practical applications: First, because the conductive roller is a solid, integral structure, its conductive area is fixed and cannot be adjusted. When producing composite strips of different widths, the area of ​​the roller surface exceeding the strip width may still be conductive, leading to uneven current distribution and making it easy for current to leak into non-target paths such as the frame and bearing housing, posing a safety hazard. Second, in order to ensure the conductivity of the roller surface, it is usually difficult to meet insulation requirements, and it is impossible to form a physical barrier in the axial direction of the roller body, resulting in disordered current diffusion within the roller body and making it impossible to achieve precise control of the effective contact area. Third, when the stationary power lead is connected to the high-speed rotating roller shaft, a slip ring or carbon brush structure is usually used. Under high current conditions, the contact resistance is high, and it is easy to generate electric sparks and wear, resulting in poor power supply stability and affecting the metallurgical quality of the composite interface. In addition, the existing technology lacks the ability to adaptively match the strip width and cannot adjust the conductive range in real time according to changes in production specifications, limiting the automation level of the production line and the product qualification rate.

[0003] Therefore, it is necessary to design a precision electric wrap angle device for rolling copper-aluminum composite thin strip with sandblasting treatment to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a precise energizing wrap angle device for rolling copper-aluminum composite thin strip with sandblasting treatment, so as to solve the problems of uncontrollable conductive area, easy current leakage, poor energizing stability and inability to self-adjust in existing devices.

[0005] To achieve the above objectives, the present invention provides the following solution: a precision electrified corner-wrapping device for rolling copper-aluminum composite thin strip with sandblasting treatment, comprising a coiler, an insulating roller, and an electrified guide roller, a copper powder sandblaster, and an aluminum powder sandblaster arranged symmetrically in parallel; the electrified guide roller includes a first roller shaft and multiple conductive sections coaxially sleeved on the first roller shaft along the axial direction, with an insulating section between adjacent conductive sections, and a closed cavity inside the insulating section; the first roller shaft has a central through hole and an independent medium channel inside, the medium channel communicating with the closed cavity of the insulating section through a radial through hole; the conductive sections are provided with bearings and brush assemblies to construct a low-resistance conductive path from the first roller shaft to the outer surface of the conductive section; The copper powder blasting machine is used to spray nano copper powder onto the surface of copper strip to form a pre-textured interface on the surface of copper strip. The aluminum powder blasting machine is used to spray nano-aluminum powder onto the surface of aluminum strip to form a pre-textured interface on the surface of the green strip. The flat roller is used to roll the coated copper and aluminum strips to increase the pressing force; It also includes a PLC control system, which controls the introduction of conductive medium into the closed chamber of the insulating section within the strip width range according to the strip width detection signal, and controls the introduction of insulating medium into the closed chamber of the insulating section outside the strip width range, so as to dynamically adjust the effective conductive area of ​​the strip.

[0006] Preferably, the number of insulating sections is four, and each insulating section has four conductive medium pipes and four insulating medium pipes in its enclosed chamber. The conductive medium pipes and insulating medium pipes are connected to external fixed pipelines.

[0007] Preferably, the first roller has eight radial through holes with a diameter of 5 mm, wherein the upper four radial through holes serve as inlet and outlet channels for conductive medium pipes, and the lower four radial through holes serve as inlet and outlet channels for insulating medium pipes.

[0008] Preferably, the brush assembly includes a conductive sleeve, a brush holder, and a battery cell. The brush holder is fixed on the first roller shaft, and the battery cell is pressed against the inner wall of the conductive section by an elastic element. The brush holder is provided with a wire hole, which corresponds to the radial lead-out hole on the first roller shaft.

[0009] Preferably, the central through hole of the first roller shaft has a diameter of 12mm and is used to lay pulse current wires; there are five radial lead-out holes with a diameter of 5mm, and the wires pass through the radial lead-out holes and wire holes and are connected to the conductive sleeve.

[0010] Preferably, the conductive medium is a zinc sulfate aqueous solution with a concentration of 150 g / L-200 g / L and a conductivity of 20 mS / cm-30 mS / cm; the insulating medium is deionized water with a resistivity of not less than 1 MΩ·cm.

[0011] Preferably, an insulating end cap is installed on the outer side of the conductive segment.

[0012] Preferably, it also includes a pressure sensor, which is installed on the shape gauge of the 20-roll mill.

[0013] Preferably, the surfaces of the work rolls of the 20-roll mill, the shape meter, and the coiler are all insulated.

[0014] Preferably, the second roller shaft of the insulating roller is a solid shaft structure.

[0015] Compared with the prior art, the present invention has the following advantages and technical effects: 1. The upper and lower energized guide rollers, insulating rollers, and winding machine of the present invention form a wrap-around structure, which can ensure that there is sufficient contact area and contact pressure between the strip and the energized guide rollers to meet the current conduction requirements.

[0016] 2. This invention can automatically switch the dielectric type of each insulating end according to the actual width of the copper-aluminum composite strip through the PLC control system, accurately match the effective conductive area, completely solve the problem of fixed conductive range and poor adaptability of traditional integral electrified rollers, and greatly improve the uniformity of strip electrification and rolling accuracy.

[0017] 3. This invention features an independent dual-medium conveying channel with radial through holes in the upper and lower sections for conveying conductive and insulating media. Combined with a hollow insulating end closed cavity structure, it achieves non-mixing and sealed continuous conveying of the media. The media conveying stability is strong when the roller is rotating, ensuring the accuracy of zoned conductivity control.

[0018] 4. The brush assembly of the present invention, in conjunction with the central through-wire structure, constructs a complete low-resistance conductive path from roller shaft to brush to conductive section to strip, realizing a stable current transition from "stationary wire to rotating roller surface". Under high current conditions, the conductive loss is low and there is no power outage or jamming. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram showing the arrangement of the corner-wrapping device of the present invention in a production line; Figure 2 This is a schematic diagram of the electrically powered steering roller of the present invention; Figure 3 This is a cross-sectional view of the electrically powered steering roller of the present invention; Figure 4 This is a schematic diagram of the brush assembly of the present invention; Figure 5 This is a schematic diagram of the cross-section of the electrically powered steering roller and the medium channel of the present invention; Figure 6 This is a schematic diagram of the insulating roller of the present invention; Figure 7 This is a comparison image of the morphology of the copper-aluminum bonding interface of the present invention and that of the ordinary cold-rolled bonding interface. The components include: 1. Winding machine; 2. Process platform; 3. Degreasing device; 4. 20-roll mill; 5. Plate shaper; 6. Pressure sensor; 7. Insulating roller; 8. Powered steering roller; 9. Winding machine; 10. Insulating end cap; 11. Conductive section; 12. Insulating section; 13. Brush holder; 14. Battery cell; 15. First roller shaft; 16. Brush assembly; 17. Medium channel; 18. Conductive sleeve; 19. Second roller shaft; 20. Flat roller; 21. Copper powder blasting machine; 22. Aluminum powder blasting machine. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figures 1 to 7 As shown, the present invention provides a precision electrified corner-wrapping device for rolling copper-aluminum composite thin strip with sandblasting treatment, including a coiler 9, an insulating roller 7, and an electrified guide roller 8 arranged symmetrically in parallel, a copper powder sandblaster 21, and an aluminum powder sandblaster 22; the electrified guide roller 8 includes a first roller shaft 15 and multiple conductive sections 11 coaxially sleeved on the first roller shaft 15 along the axial direction, with an insulating section 12 between adjacent conductive sections 11, and a closed cavity inside the insulating section 12; the first roller shaft 15 has a central through hole and an independent medium channel 17 inside, and the medium channel 17 communicates with the closed cavity of the insulating section 12 through a radial through hole; the conductive section 11 is provided with a bearing and a brush assembly 16 to construct a low-resistance conductive path from the first roller shaft 15 to the outer surface of the conductive section 11; Copper powder blasting device 21 is used to spray nano copper powder onto the surface of copper strip to form a pre-textured interface on the surface of copper strip; The aluminum powder blasting machine 22 is used to spray nano aluminum powder onto the surface of aluminum strip to form a pre-textured interface on the surface of the aluminum strip; The flat roller 20 is used to pre-press down the coated copper and aluminum strips. The flat roller 20 consists of upper and lower ceramic insulated rollers, with the roller gap being smaller than the strip thickness, and the pressing rate is 20% to 30%. It also includes a PLC control system, which controls the introduction of conductive medium into the closed chamber of the insulating section 12 within the strip width range based on the strip width detection signal, and controls the introduction of insulating medium into the closed chamber of the insulating section 12 outside the strip width range, so as to dynamically adjust the effective conductive area of ​​the strip.

[0024] Furthermore, a flat roller 20, a copper powder blaster 21, and an aluminum powder blaster 22 are also provided between the electrically powered steering roller 8 and the winding machine 9. The copper powder blaster 21 and the aluminum powder blaster 22 are sprayed by air pressure. When the air enters from the air inlet and the switch is turned on, the powder can rise. Nano-copper powder is sprayed onto the lower surface of the copper strip to form a pre-textured interface, and nano-aluminum powder is sprayed onto the lower surface of the aluminum strip, so that the surfaces of the copper strip and the aluminum strip form a pre-textured interface. Then, it is rolled by flat roll 20 to increase the pressing force. The flat roll 20 presses the strip to pre-compress it tightly, so as to achieve a tight embedding of nanoparticles and strip. Because nano-copper powder and nano-aluminum powder are sprayed on the strip, the degree of interface diffusion is improved. Then, the electrically conductive guide roll 8 automatically switches the dielectric type of each insulation section 12 according to the actual width of the copper-aluminum composite thin strip through the PLC control system, accurately matching the effective conductive area, which greatly improves the uniformity of electrical conduction and rolling accuracy of the thin strip. After passing through the work roll of the twenty-roll mill 4, the two sides are pressed evenly, so that the surface of the strip is straight, making the strip easy to roll and with high surface quality.

[0025] The scheme is further optimized so that there are four insulating sections 12. Each insulating section 12 has four conductive medium pipes and four insulating medium pipes in its enclosed chamber. The conductive medium pipes and insulating medium pipes converge at the end of the first roller shaft 15 and are connected to the external fixed pipeline to realize continuous medium transportation in the rotating state.

[0026] In a further optimized design, the first roller 15 has eight radial through holes with a diameter of 5mm. The upper four radial through holes serve as inlet and outlet channels for conductive medium pipes, while the lower four radial through holes serve as inlet and outlet channels for insulating medium pipes, in order to prevent the medium from mixing inside the first roller 15.

[0027] Further optimization of the scheme: the brush assembly 16 includes a conductive sleeve 18, a brush holder 13 and a battery cell 14. The brush holder 13 is fixed on the first roller shaft 15, and the battery cell 14 is pressed against the inner wall of the conductive section 11 by an elastic element. The brush holder 13 is provided with a wire hole, which corresponds to the radial lead-out hole on the first roller shaft 15.

[0028] The scheme is further optimized. The diameter of the central through hole of the first roller 15 is 12mm, which is used to lay the pulse current wire. There are five radial lead-out holes with a diameter of 5mm. The wire passes through the radial lead-out holes and the wire hole and is connected to the conductive sleeve 18.

[0029] The scheme was further optimized so that the conductive medium is a zinc sulfate aqueous solution with a concentration of 150g / L-200g / L and a conductivity of 20mS / cm-30mS / cm; the insulating medium is deionized water with a resistivity of not less than 1MΩ·cm.

[0030] In a further optimized design, an insulating end cap 10 is installed on the outside of the conductive section 11. The insulating end cap 10 is used to achieve end sealing, electrical insulation and prevent the intrusion of external impurities.

[0031] Further optimization of the scheme also includes a pressure sensor 6, which is installed on the shape meter 5 of the 20-roll mill 4. The pressure sensor 6 is used to collect shape pressure data in real time and feed it back to the mill control system to adjust the rolling pressure.

[0032] To further optimize the design, the surfaces of the work rolls of the 20-roll mill 4, the shape meter 5, and the coiler 9 are all insulated to prevent current loss during high-current conduction.

[0033] In a further optimized design, the second roller shaft 19 of the insulating roller 7 is a solid shaft structure, which is used in conjunction with the segmented electrically powered steering roller in the wrap angle structure to turn the strip and provide tension support.

[0034] The energized guide roller 8 adopts a symmetrical arrangement, with the upper and lower energized guide rollers 8 set in parallel. The copper-aluminum composite strip to be rolled contacts the upper and lower energized guide rollers 8 to achieve energization. The energized guide roller 8 is mounted with the first roller shaft 15 at its internal center as the mounting reference, and five conductive segments 11 are arranged coaxially along the first roller shaft 15 to form an integral conductive roller.

[0035] The energized guide roller 8 adopts a five-segment independent partition structure, which is composed of five conductive segments 11 arranged sequentially along the axial direction; an insulating segment 12 is set between adjacent conductive segments 11, and there are four insulating segments 12 in total; the number of energized segments of the energized guide roller 8 is usually fixedly configured according to the standard width of the strip.

[0036] The insulating section 12 is a hollow cavity. Each insulating section 12 is equipped with four conductive medium pipes and four insulating medium pipes, for a total of eight pipes, which are connected to external fixed pipelines through the end of the first roller shaft 15 to ensure the sealing and continuity of liquid transportation during roller rotation. The pipes can selectively introduce conductive medium into the inner cavity of the insulating section 12 within the corresponding width range of the strip to be rolled, while non-conductive medium is introduced into the remaining sections, thereby precisely defining the effective conductive area through which the current flows. When the strip width allows a certain insulating section 12 to fall within the effective conductive requirement range, the control system switches to injecting a conductive liquid medium, zinc sulfate aqueous solution, into that insulating section 12. After the medium fills the inner cavity of the insulating section 12, a liquid conductor with a certain conductivity is formed in a local area of ​​the roller surface, allowing that insulating section 12 to participate in the overall current conduction of the roller surface, thereby achieving effective energization in that area. When the strip width does not cover the insulating section 12, or when the insulating section 12 does not need to participate in conductivity, the control system switches to injecting an insulating liquid medium, deionized water.

[0037] The switching between the two liquid media is automatically executed by the PLC control system based on the strip width detection signal, and the switching response time meets the production cycle requirements.

[0038] Conductive segment 11 is a high-conductivity conductive segment that directly contacts the strip to achieve energization. Insulating end caps 10 are installed at the ends of the outermost two conductive sections 11 to achieve end sealing and electrical insulation, preventing current leakage, arc discharge and intrusion of external dust and coolant.

[0039] The brush assembly 16 is located between two bearings. Its function is to transfer the current of the wire in the through hole of the first roller shaft 15 to the roller surface of the rotating conductive section 11, so as to realize the current transition from "stationary wire to rotating roller surface".

[0040] The first roller 15 has a hollow structure. Liquid media with different conductivity properties are alternately injected into the first roller 15 to achieve dynamic control of the conductivity state of the insulating section 12. The first roller 15 has an independent medium channel 17 inside. The two liquid media are introduced from the outside through dedicated pipelines and enter the inner cavity of the roller through the end sealing interface.

[0041] On the surface of the first roller shaft 15, there are two radial through holes with a diameter of 5 mm at the roller position corresponding to each insulating section 12, for a total of eight radial through holes. These holes are evenly distributed along the circumference of the first roller shaft 15. The four upper holes and the four lower holes serve as independent inlet and outlet channels for the two media, ensuring that the two media do not mix inside the first roller shaft 15. The insulating section 12 is fitted inside the first roller shaft 15, forming a closed liquid-containing cavity. After the medium is injected through the through holes of the first roller shaft 15, it fills the inner cavity of the insulating section 12, thereby changing the conductivity of the insulating section 12.

[0042] A 12mm diameter through hole is provided at the center of the first roller shaft 15 for the internal arrangement of pulse current conductors. Five radial lead-out holes are evenly distributed circumferentially on the circumferential surface of the middle part of the first roller shaft 15. The radial lead-out holes correspond one-to-one with the wire holes on the brush holder 13. The conductors are introduced from one end of the first roller shaft 15 through the through holes and connected to the conductive sleeves 18 inside each conductive section 11, forming a complete low-resistance conductive path from the first roller shaft 15 to the brush assembly 16 to the conductive section 11 to the strip, realizing the conduction of current from the external power source to the roller surface of each energized section.

[0043] Because the energized guide roller 8 conducts a large current during operation, in order to prevent the current from dissipating through the first roller shaft 15 towards the bearing and frame, the surfaces of the 20-roll mill 4 work roller, as well as the shaper 5, coiler 9, winding machine 1, process platform 2, and degreasing device 3, need to be insulated to meet the insulation requirements of the energized circuit for the roller shaft.

[0044] The complete path of current transfer from the output of the external pulse power supply to the surface of the strip is as follows: External cable introduction: The positive and negative terminals of the pulse power supply are led to the outside of the process platform 2 through copper cables, and the cable terminals enter the through hole of the first roller shaft 15 through the insulating through-plate sleeve; Roller end wiring: The cable is connected to the terminal at the end of the first roller 15 through a copper connector lug, and the contact surface is silver-plated to reduce contact resistance; Internal wiring of the roller: The wire is introduced from the end of the first roller 15 and arranged axially along the inner cavity of the hollow roller to the middle area of ​​the roller body; Radial lead-out holes: Five radial lead-out holes are evenly distributed along the circumference on the middle circumferential surface of the first roller shaft 15. The wires pass through the guide insulating sleeve inside the lead-out holes from the inner cavity to the outer surface of the first roller shaft 15. Brush segment connection: The end of the wire is connected to the inside of the brush assembly 16, which is fitted onto the outer surface of the first roller shaft 15. The brush assembly 16 has a ring structure, and its inner diameter is interference-fitted with the outer diameter of the first roller shaft 15. The end of the wire is connected to the copper terminal block on the inner surface of the brush assembly 16 by welding or bolt crimping. Sliding contact of the brush: The outer surface of the brush assembly 16 is a conductive working surface, which forms a sliding electrical contact with the inner surface of the conductive section 11 of the outer layer of the brush assembly 16. When the conductive roller rotates with the strip rolling, the brush assembly 16 and the first roller shaft 15 are fixed on the bearing seat and rotate relative to the conductive roller surface, thereby uniformly energizing the entire energized guide roller 8. The outer surface of the brush assembly 16 and the inner surface of the conductive roller maintain electrical connection through contact pressure. The conductive roller faces outwards to conduct electricity: the outer surface of the conductive section 11 contacts the strip, guiding the current into the strip and completing the current transfer.

[0045] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0046] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope of the present invention.

Claims

1. A precision energized wrap angle device for rolling copper-aluminum composite thin strip with sandblasting treatment, characterized in that, It includes a coiler (9), an insulating roller (7), and electrically driven guide rollers (8), a flat roller (20), a copper powder blaster (21), and an aluminum powder blaster (22) arranged symmetrically in parallel. The electrically powered steering roller (8) includes a first roller shaft (15) and a plurality of conductive sections (11) coaxially sleeved on the first roller shaft (15) along the axial direction. An insulating section (12) is provided between adjacent conductive sections (11), and the insulating section (12) has a closed cavity inside. The first roller shaft (15) has a central through hole and an independent medium channel (17) inside. The medium channel (17) is connected to the closed cavity of the insulating section (12) through a radial through hole. The conductive section (11) is provided with a bearing and a brush assembly (16) to form a low-resistance conductive path from the first roller shaft (15) to the outer surface of the conductive section (11). The copper powder blasting device (21) is used to spray nano copper powder onto the surface of copper strip to form a pre-textured interface on the surface of copper strip; The aluminum powder blasting machine (22) is used to spray nano aluminum powder onto the surface of aluminum strip to form a pre-textured interface on the surface of aluminum strip; The flat roller (20) is used to pre-press down the coated copper and aluminum strips; It also includes a PLC control system, which controls the introduction of conductive medium into the closed chamber of the insulation section (12) within the strip width range according to the strip width detection signal, and controls the introduction of insulating medium into the closed chamber of the insulation section (12) outside the strip width range, so as to dynamically adjust the effective conductive area of ​​the strip.

2. The precision energized wrap angle device for rolling copper-aluminum composite thin strip with sandblasting treatment according to claim 1, characterized in that, The number of insulating sections (12) is four. Each insulating section (12) has four conductive medium pipes and four insulating medium pipes in its enclosed chamber. The conductive medium pipes and insulating medium pipes are connected to external fixed pipelines.

3. The precision energized wrap angle device for rolling copper-aluminum composite thin strip with sandblasting treatment according to claim 2, characterized in that, The first roller (15) has eight radial through holes with a diameter of 5 mm. The upper four radial through holes serve as the inlet and outlet channels for the conductive medium pipe, and the lower four radial through holes serve as the inlet and outlet channels for the insulating medium pipe.

4. The precision energized wrap angle device for rolling copper-aluminum composite thin strip with sandblasting treatment according to claim 1, characterized in that, The brush assembly (16) includes a conductive sleeve (18), a brush holder (13), and a battery cell (14). The brush holder (13) is fixed on the first roller shaft (15), and the battery cell (14) is pressed against the inner wall of the conductive section (11) by an elastic element. The brush holder (13) is provided with a wire hole, which corresponds to the radial lead-out hole on the first roller shaft (15).

5. The precision energized wrap angle device for rolling copper-aluminum composite thin strip with sandblasting treatment according to claim 4, characterized in that, The central through hole of the first roller (15) has a diameter of 12 mm and is used to lay pulse current wires; there are five radial lead-out holes with a diameter of 5 mm. The wires pass through the radial lead-out holes and wire holes and are then connected to the conductive sleeve (18).

6. The precision energized wrap angle device for rolling copper-aluminum composite thin strip with sandblasting treatment according to claim 1, characterized in that, The conductive medium is a zinc sulfate aqueous solution with a concentration of 150 g / L-200 g / L and a conductivity of 20 mS / cm-30 mS / cm; the insulating medium is deionized water with a resistivity of not less than 1 MΩ·cm.

7. The precision energized wrap angle device for rolling copper-aluminum composite thin strip with sandblasting treatment according to claim 1, characterized in that, An insulating end cap (10) is installed on the outside of the conductive segment (11).

8. The precision energized wrap angle device for rolling copper-aluminum composite thin strip with sandblasting treatment according to claim 1, characterized in that, It also includes a pressure sensor (6), which is mounted on the plate shaper (5) of the twenty-roll mill (4).

9. A precision energized wrap angle device for rolling copper-aluminum composite thin strip with sandblasting treatment according to claim 8, characterized in that, The surfaces of the work rolls of the twenty-roll mill (4), the plate shaper (5), and the coiler (9) are all insulated.

10. The precision energized wrap angle device for rolling copper-aluminum composite thin strip with sandblasting treatment according to claim 1, characterized in that, The second roller shaft (19) of the insulating roller (7) is a solid shaft structure.

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