Production method of copper-aluminum composite material

Abstract

The invention discloses a production method of a copper-aluminum composite material. The production method comprises the following steps that a pretreated copper plate is put into a preheating furnace to be preheated; lifting and transferring the preheated copper plate to a supporting platform in the crystallizer by using a lifting appliance; argon is injected, air is exhausted, and then molten aluminum is poured; when the initial skull reaches a preset thickness, starting an ingot guiding system to perform continuous pouring; when the length of the cast ingot is close to a target value, the molten aluminum flow is gradually reduced, and meanwhile the downward moving speed of the supporting platform is properly reduced; the posture of the copper plate is detected in real time by arranging a double-layer clamping structure of the fixed clamping roller and the floating clamping roller with the detection function; the inclined copper plate can be automatically returned by utilizing the static pressure difference of molten aluminum, so that the problems of core shift and non-uniform thickness of an aluminum layer caused by easy deviation of the copper plate in the traditional process are effectively solved, the dependence on manual operation experience is reduced, the semi-continuous casting process is more stable and reliable, and a high-quality blank is provided for the subsequent rolling process.

Description

Technical Field

[0001] This invention relates to the field of copper-aluminum composite material casting technology, specifically a method for producing copper-aluminum composite materials. Background Technology

[0002] Copper-aluminum composite materials possess the advantages of both copper's high electrical and thermal conductivity and aluminum's lightweight and low cost, making them promising for applications in power electronics, new energy vehicle battery connectors, rail transportation, and communication equipment. Among these, the aluminum-copper-aluminum three-layer composite material is a typical form of copper-aluminum composite product, with aluminum layers on both sides and a copper layer in the middle, ensuring electrical conductivity while effectively reducing material costs.

[0003] Currently, one of the common methods for preparing aluminum-copper-aluminum three-layer composite materials is the solid-liquid composite method, which involves placing a solid copper plate in a crystallizer and then pouring in liquid aluminum, so that the aluminum liquid and copper plate form a metallurgical bond during the solidification process. This method has the advantages of short process flow, relatively low equipment investment, and high interfacial bonding strength. It is especially suitable for producing composite ingots, which are then rolled into composite plates and strips of the required specifications.

[0004] However, the existing vertical casting method for preparing copper-aluminum composite ingots still has the following technical problems: 1. The copper plate is prone to displacement during the casting process, resulting in uneven composite layer thickness. Specifically, when the copper plate is placed vertically into the crystallizer, the injection of molten aluminum will impact the copper plate, and the flow and solidification shrinkage of the molten aluminum in the crystallizer will also exert uneven forces on the copper plate; due to the lack of effective dynamic constraint on the copper plate in the crystallizer, especially during the ingot's downward movement, the middle and rear sections of the copper plate are in an unconstrained state and are prone to tilting or displacement; once the copper plate is displaced, it will lead to inconsistent aluminum layer thickness on both sides of the ingot, and in severe cases, even... The current "eccentricity" phenomenon, where the copper plate shifts to one side, results in an excessively thin aluminum layer on that side and an excessively thick aluminum layer on the opposite side. This not only affects the stability of subsequent rolling processes but also reduces the electrical conductivity and mechanical properties of the composite material. 2. In the existing process, the position and orientation of the copper plate are mainly fixed by mechanical clamps or slots during initial positioning. After casting begins, the clamps usually need to be loosened or moved upwards to avoid interference. After that, the orientation of the copper plate cannot be sensed in real time. Operators can only rely on experience to judge whether the copper plate has shifted, making it difficult to dynamically adjust process parameters according to the real-time status of the copper plate, resulting in poor consistency and stability of product quality.

[0005] To address the aforementioned issues, there is an urgent need in this field to develop a method for producing copper-aluminum composite materials that can dynamically clamp and monitor copper plates in real time, ensure the stability of the copper plate's posture, and improve the quality of interfacial bonding. Summary of the Invention

[0006] The technical problem to be solved by this invention is to overcome the existing defects and provide a method for producing copper-aluminum composite materials. By setting up a double-layer clamping structure with fixed clamping rollers and floating clamping rollers with detection function, the posture of the copper plate can be detected in real time. It can also use the static pressure difference of molten aluminum to automatically straighten the tilted copper plate. This effectively solves the problems of "eccentricity" caused by easy copper plate displacement and uneven aluminum layer thickness in traditional processes, greatly reduces the dependence on manual operation experience, makes the semi-continuous casting process more stable and reliable, and provides high-quality billets for subsequent rolling processes. It can effectively solve the problems in the background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a method for producing copper-aluminum composite materials, comprising the following steps: S1. Place the pre-treated copper plate into a preheating furnace and heat it to 300-450℃ to reduce the temperature difference with the molten aluminum and prevent the molten aluminum from solidifying rapidly upon cooling to form a cold insulation layer. S2. Use a lifting device to vertically lift the preheated copper plate and move it to a suitable position directly above the crystallizer, while keeping the copper plate in the clamping and stabilizing device; S3. Start the clamping device so that the fixed clamping rollers of the upper group and the floating clamping rollers of the lower group lightly touch the surface of the copper plate and apply a constant preload. S4. Slowly lower the copper plate until the bottom of the copper plate lands steadily on the support platform inside the crystallizer. At this time, the weight of the copper plate is supported by the support platform. The fixed clamping roller and the floating clamping roller both play a role in straightening and guiding. Then record the initial readings of the pressure sensors corresponding to the two floating clamping rollers and the zero position of the angular velocity sensor on the fixed clamping roller as the reference data for subsequent monitoring. S5. Inject argon gas into the liquid surface area inside the crystallizer to displace air and reduce the formation of aluminum oxide scale; S6. The molten aluminum is injected into the crystallizer at a low flow rate through the flow channel; the molten aluminum comes into contact with the preheated copper plate and the support platform at the bottom of the crystallizer, and solidifies rapidly under the action of cooling water around the crystallizer, forming a closed "bottom support" that firmly wraps and fixes the bottom of the copper plate. S7. Once the initial solidified shell reaches the preset thickness, the ingot-feeding system is activated. The support platform begins to slowly move downwards at a set speed for continuous pouring. During the pouring process, the floating clamping rollers are controlled to perform periodic up-and-down reciprocating motions, while pressure sensors detect pressure changes in real time. If the copper plate tilts slightly under the impact of the molten aluminum, it will press against the floating clamping rollers on one side, causing the pressure sensor reading on that side to rise and the reading on the other side to fall. Once the pressure difference between the two sides exceeds the set threshold, the control system issues an alarm, prompting a reduction in the pouring speed, and uses the static pressure difference of the molten aluminum to automatically straighten the copper plate. S8. When the ingot length is close to the target value, gradually reduce the flow rate of aluminum liquid and at the same time appropriately reduce the downward movement speed of the support platform; after stopping the downward movement, continue to pour at a small flow rate for a short period of time, and use the static pressure of the upper aluminum liquid to liquid-fill the tiny gaps caused by the solidification shrinkage of the lower part to ensure that the aluminum layer in the top area of ​​the copper plate is dense. S9. Close the flow channel and stop the injection of aluminum liquid, thus completing the production of copper-aluminum composite ingots.

[0008] In a preferred embodiment of the present invention, in S2, the clamping device includes a base with a track groove. A mounting frame is slidably arranged inside the track groove. A sliding groove is provided on the side of the mounting frame. A top plate and a bottom plate are slidably arranged inside the sliding groove. The middle of the top plate is connected to the middle of the bottom plate via a vertical electro-hydraulic push rod. An upper slider is slidably arranged inside a horizontal sliding groove on the side of the top plate. A fixed clamping roller is rotatably arranged on the side of the upper slider. An angular velocity sensor for detecting the rotation angle or speed of the fixed clamping roller is provided inside the upper slider. A lower slider is slidably arranged inside a horizontal sliding groove on the side of the bottom plate. A floating clamping roller is rotatably arranged on the side of the lower slider. Horizontal electro-hydraulic push rods are provided on the sides of both the top plate and the bottom plate. The upper slider and the lower slider are respectively connected to the corresponding horizontal electro-hydraulic push rods. A pressure sensor is installed between the lower slider and the horizontal electro-hydraulic push rods for real-time detection of the lateral pressure on the floating clamping roller.

[0009] As a preferred embodiment of the present invention, a horizontal servo motor is provided at one end of the base, and a horizontal screw is installed on the output shaft of the horizontal servo motor through a coupling. The horizontal screw is threadedly connected to a threaded hole at the bottom of the mounting bracket, and is used to drive the mounting bracket to move horizontally along the track groove of the base. A longitudinal servo motor is provided at the top of the mounting bracket, and a longitudinal screw is installed on the output shaft of the longitudinal servo motor through a coupling. The longitudinal screw is threadedly connected to a threaded hole in the middle of the top plate, and is used to drive the top plate to move longitudinally up and down along the slide groove of the mounting bracket.

[0010] As a preferred technical solution of the present invention, in S7, after the ingot-drawing system is working, the angular velocity sensor detects the rotation angle of the fixed clamping roller in real time, and converts the change in angle per unit time into linear velocity, which is used to detect whether the downward speed of the copper plate is consistent with the downward speed of the support platform.

[0011] As a preferred technical solution of the present invention, in S7, after the ingot-drawing system is working, the floating clamping roller is controlled by the vertical electro-hydraulic push rod to perform periodic up-and-down reciprocating motion.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. The copper-aluminum composite material production method of this invention establishes a real-time monitoring system for the copper plate's attitude by setting up a double-layer clamping structure of fixed clamping rollers and floating clamping rollers, and by setting an angular velocity sensor on the fixed clamping rollers and a pressure sensor between the mounting base of the floating clamping rollers and the horizontal electro-hydraulic push rod. The angular velocity sensor calculates the downward speed of the copper plate by detecting the rotation angle of the fixed clamping rollers, ensuring that the copper plate and the support platform descend synchronously. The pressure sensor detects the difference in lateral pressure on the two floating clamping rollers, sensitively capturing the slight tilt of the copper plate. When the copper plate is detected to be tilted, the control system automatically reduces the pouring speed and uses the static pressure difference of the aluminum liquid to automatically straighten the copper plate, effectively solving the problems of "eccentricity" and uneven aluminum layer thickness caused by easy copper plate displacement in traditional processes.

[0013] 2. In the copper-aluminum composite material production method of the present invention, the angular velocity sensor calculates the downward speed by monitoring the rotation of the fixed clamping roller, ensuring that the copper plate and the support platform descend synchronously and preventing jamming.

[0014] 3. The copper-aluminum composite material production method of the present invention achieves precise horizontal alignment of the copper plate in the crystallizer by driving a horizontal screw with a horizontal servo motor to move the mounting frame horizontally along the track groove of the base; and achieves height matching between the clamping device and the crystallizer by driving a vertical screw with a vertical servo motor to move the top plate vertically along the slide groove of the mounting frame. This dual-axis servo adjustment mechanism greatly improves the positioning accuracy of the copper plate and provides a precise initial position guarantee for the subsequent composite process.

[0015] 4. The copper-aluminum composite material production method of this invention connects the top plate and the bottom plate through a vertical electro-hydraulic actuator, which can precisely control the up and down position of the floating clamping roller and drive the floating clamping roller to perform periodic up and down reciprocating motion during the casting process, thereby verifying the contact state between the clamping roller and the copper plate in real time. At the same time, the upper and lower sliders are driven by corresponding horizontal electro-hydraulic actuators, which can flexibly adjust the clamping force according to the thickness and surface condition of the copper plate, ensuring the straightening effect while avoiding damage to the surface of the copper plate caused by excessive clamping force.

[0016] 5. The copper-aluminum composite material production method of the present invention uses a double-layer clamping structure with fixed clamping rollers and floating clamping rollers with detection function to detect the posture of the copper plate in real time; it can also use the static pressure difference of the aluminum liquid to automatically straighten the tilted copper plate, which effectively solves the problems of "eccentricity" and uneven aluminum layer thickness caused by the easy deviation of the copper plate in the traditional process, greatly reduces the dependence on manual operation experience, makes the semi-continuous casting process more stable and reliable, and provides high-quality billets for the subsequent rolling process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the process of the present invention; Figure 2This is a schematic diagram of the clamping device in this invention; Figure 3 This is a schematic diagram of the installation structure of the upper slider and the fixed clamping roller of the present invention.

[0018] In the diagram: 1. Base, 2. Horizontal servo motor, 21. Horizontal screw, 3. Mounting bracket, 31. Slide groove, 32. Longitudinal servo motor, 33. Longitudinal screw, 4. Top plate, 41. Vertical electro-hydraulic actuator, 42. Base plate, 5. Upper slider, 6. Fixed clamping roller, 61. Angular velocity sensor, 7. Lower slider, 71. Floating clamping roller, 72. Pressure sensor, 8. Horizontal electro-hydraulic actuator. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-3 This invention provides a technical solution: a method for producing copper-aluminum composite materials, comprising the following steps: S1. Place the pre-treated copper plate into a preheating furnace and heat it to 300-450℃ to reduce the temperature difference with the molten aluminum and prevent the molten aluminum from solidifying rapidly upon cooling to form a cold insulation layer. S2. Use a lifting device to vertically lift the preheated copper plate and move it to a suitable position directly above the crystallizer, while keeping the copper plate in the clamping and stabilizing device; S3. Start the clamping device so that the fixed clamping roller 6 of the upper group and the floating clamping roller 71 of the lower group lightly touch the surface of the copper plate and apply a constant preload. S4. Slowly lower the copper plate until the bottom of the copper plate lands steadily on the support platform inside the crystallizer. At this time, the weight of the copper plate is supported by the support platform. The fixed clamping roller 6 and the floating clamping roller 71 both play a role in straightening and guiding. Then record the initial readings of the pressure sensors 72 corresponding to the two floating clamping rollers 71, as well as the zero point position of the angular velocity sensor 61 on the fixed clamping roller 6, as the reference data for subsequent monitoring. S5. Inject argon gas into the liquid surface area inside the crystallizer to displace air and reduce the formation of aluminum oxide scale; S6. The molten aluminum is injected into the crystallizer at a low flow rate through the flow channel; the molten aluminum comes into contact with the preheated copper plate and the support platform at the bottom of the crystallizer, and solidifies rapidly under the action of cooling water around the crystallizer, forming a closed "bottom support" that firmly wraps and fixes the bottom of the copper plate. S7. Once the initial solidified shell reaches the preset thickness, the ingot-drawing system is activated, and the support platform begins to slowly move downwards at a set speed for continuous pouring. During the pouring process, the floating clamping roller 71 is controlled to perform periodic up-and-down reciprocating motion, while the pressure sensor 72 detects pressure changes in real time. If the copper plate tilts slightly under the impact of the molten aluminum, the copper plate will press against the floating clamping roller 71 on one side, causing the reading of the pressure sensor 72 on that side to increase and the reading on the other side to decrease. Once the pressure difference between the two sides is detected to exceed the set threshold, the control system issues an alarm, prompting a reduction in the pouring speed, and uses the static pressure difference of the molten aluminum to automatically straighten the copper plate. S8. When the ingot length is close to the target value, gradually reduce the flow rate of aluminum liquid and at the same time appropriately reduce the downward movement speed of the support platform; after stopping the downward movement, continue to pour at a small flow rate for a short period of time, and use the static pressure of the upper aluminum liquid to liquid-fill the tiny gaps caused by the solidification shrinkage of the lower part to ensure that the aluminum layer in the top area of ​​the copper plate is dense. S9. Close the flow channel and stop the injection of aluminum liquid, thus completing the production of copper-aluminum composite ingots.

[0021] Further, in S2, the clamping device includes a base 1, on which a track groove is provided, and a mounting frame 3 is slidably arranged inside the track groove. A sliding groove 31 is provided on the side of the mounting frame 3, and a top plate 4 and a bottom plate 42 are slidably arranged inside the sliding groove 31. The middle part of the top plate 4 is connected to the middle part of the bottom plate 42 through a vertical electro-hydraulic push rod 41. An upper slider 5 is slidably arranged inside the horizontal sliding groove on the side of the top plate 4. A fixed clamping roller 6 is rotatably arranged on the side of the upper slider 5, and an angular velocity sensor 61 for detecting the rotation angle or speed of the fixed clamping roller 6 is provided inside the upper slider 5. A lower slider 7 is slidably arranged inside the horizontal sliding groove on the side of the bottom plate 42, and a floating clamping roller 71 is rotatably arranged on the side of the lower slider 7. Horizontal electro-hydraulic push rods 8 are provided on the sides of both the top plate 4 and the bottom plate 42, and the upper slider 5 and the lower slider 7 are respectively connected to the corresponding horizontal electro-hydraulic push rods 8. A pressure sensor 72 is installed between the lower slider 7 and the horizontal electro-hydraulic push rod 8 for real-time detection of the lateral pressure on the floating clamping roller 71.

[0022] The top plate 4 and the bottom plate 42 are connected by a vertical electro-hydraulic actuator 41, which can precisely control the up and down position of the floating clamping roller 71 and drive the floating clamping roller 71 to perform periodic up and down reciprocating motion during the casting process, verifying the contact state between the clamping roller and the copper plate in real time. At the same time, the upper slider 5 and the lower slider 7 are driven by corresponding horizontal electro-hydraulic actuators 8, which can flexibly adjust the clamping force according to the thickness and surface condition of the copper plate, ensuring the straightening effect while avoiding damage to the surface of the copper plate caused by excessive clamping force.

[0023] Furthermore, a horizontal servo motor 2 is provided at one end of the base 1. A horizontal screw 21 is installed on the output shaft of the horizontal servo motor 2 via a coupling. The horizontal screw 21 is threadedly connected to the threaded hole at the bottom of the mounting bracket 3, which is used to drive the mounting bracket 3 to move horizontally along the track groove of the base 1. A longitudinal servo motor 32 is provided at the top of the mounting bracket 3. A longitudinal screw 33 is installed on the output shaft of the longitudinal servo motor 32 via a coupling. The longitudinal screw 33 is threadedly connected to the screw hole in the middle of the top plate 4, which is used to drive the top plate 4 to move longitudinally up and down along the slide groove 31 of the mounting bracket 3.

[0024] Furthermore, in S7, after the ingot-drawing system is working, the angular velocity sensor 61 detects the rotation angle of the fixed clamping roller 6 in real time, and converts the change in angle per unit time into linear velocity to detect whether the downward speed of the copper plate is consistent with the downward speed of the support platform.

[0025] Furthermore, in S7, after the ingot-drawing system is working, the floating clamping roller 71 is controlled by the vertical electro-hydraulic push rod 41 to perform periodic up-and-down reciprocating motion.

[0026] This invention integrates multiple execution and detection components, including an angular velocity sensor 61, a pressure sensor 72, a horizontal servo motor 2, a longitudinal servo motor 32, and a vertical electro-hydraulic push rod 41, forming a closed-loop control system for the entire process from copper plate positioning, clamping, pouring to feeding. By guiding the adjustment of process parameters through real-time sensor data, the reliance on manual operation experience is greatly reduced, making the semi-continuous casting process more stable and reliable, and providing high-quality billets for subsequent rolling processes.

[0027] In this invention, the upper slider 5 and the lower slider 7 are driven independently by corresponding horizontal electro-hydraulic push rods 8, which can precisely adjust the clamping distance between the fixed clamping roller 6 and the floating clamping roller 71 according to the actual thickness of the copper plate. Copper plates of different thicknesses can be stably clamped by adjusting the extension of the horizontal electro-hydraulic push rod 8, ensuring that the clamping roller and the surface of the copper plate maintain a constant preload, and avoiding unstable clamping or surface damage caused by changes in the thickness of the copper plate.

[0028] When it is necessary to produce composite materials with asymmetrical aluminum layer thickness ratios on both sides, the horizontal servo motor 2 can drive the horizontal screw 21 to move the mounting frame 3 horizontally along the track groove of the base 1, so that the copper plate can be precisely arranged at any horizontal position in the crystallizer, realizing the offset arrangement of the copper plate in the composite ingot.

[0029] Preheating the copper plate to 300-450℃ effectively reduces the temperature difference between the copper plate and the molten aluminum, preventing the molten aluminum from solidifying prematurely due to rapid cooling and forming a "cold barrier." Simultaneously, argon gas is injected into the crystallizer in step S5 to expel air, significantly reducing the probability of alumina scale forming on the composite interface of the high-temperature molten aluminum. Combined with the decelerated pouring and liquid feeding process in step S8, the static pressure of the upper molten aluminum is used to fill the tiny gaps caused by solidification shrinkage, significantly improving the density of the ingot and the interfacial bonding strength.

[0030] This invention uses a double-layer clamping structure consisting of a fixed clamping roller 6 and a floating clamping roller 71 with detection function to detect the posture of the copper plate in real time. It can also use the static pressure difference of the molten aluminum to automatically straighten the tilted copper plate, effectively solving the problems of "eccentricity" and uneven aluminum layer thickness caused by the easy deviation of the copper plate in the traditional process. It greatly reduces the dependence on manual operation experience, making the semi-continuous casting process more stable and reliable, and providing high-quality billets for the subsequent rolling process.

[0031] All parts not disclosed in this invention are prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for producing copper-aluminum composite materials, characterized in that, Includes the following steps: S1. Place the pre-treated copper plate into a preheating furnace and heat it to 300-450℃ to reduce the temperature difference with the molten aluminum and prevent the molten aluminum from solidifying rapidly upon cooling to form a cold insulation layer. S2. Use a lifting device to vertically lift the preheated copper plate and move it to a suitable position directly above the crystallizer, while keeping the copper plate in the clamping and stabilizing device; S3. Start the clamping device so that the fixed clamping roller (6) of the upper group and the floating clamping roller (71) of the lower group lightly touch the surface of the copper plate and apply a constant preload. S4. Slowly lower the copper plate until the bottom of the copper plate lands steadily on the support platform inside the crystallizer. At this time, the weight of the copper plate is supported by the support platform. The fixed clamping roller (6) and the floating clamping roller (71) both play a role in straightening and guiding. Then record the initial readings of the pressure sensors (72) corresponding to the two floating clamping rollers (71) and the zero position of the angular velocity sensor (61) on the fixed clamping roller (6) as the reference data for subsequent monitoring. S5. Inject argon gas into the liquid surface area inside the crystallizer to displace air and reduce the formation of aluminum oxide scale; S6. The molten aluminum is injected into the crystallizer at a low flow rate through the flow channel; the molten aluminum comes into contact with the preheated copper plate and the support platform at the bottom of the crystallizer, and solidifies rapidly under the action of cooling water around the crystallizer, forming a closed "bottom support" that firmly wraps and fixes the bottom of the copper plate. S7. When the initial solidified shell reaches the preset thickness, the ingot-drawing system is started, and the support platform begins to slowly move down at a set speed for continuous pouring. During the pouring process, the floating clamping roller (71) is controlled to perform periodic up-and-down reciprocating motion, while the pressure sensor (72) detects pressure changes in real time. If the copper plate tilts slightly under the impact of the molten aluminum, the copper plate will press the floating clamping roller (71) on one side, causing the pressure sensor (72) on that side to read higher and the reading on the other side to read lower. Once the pressure difference between the two sides is detected to exceed the set threshold, the control system issues an alarm, prompting the pouring speed to be reduced, and the copper plate is automatically straightened by the static pressure difference of the molten aluminum. S8. When the ingot length is close to the target value, gradually reduce the flow rate of aluminum liquid and at the same time appropriately reduce the downward movement speed of the support platform; after stopping the downward movement, continue to pour at a small flow rate for a short period of time, and use the static pressure of the upper aluminum liquid to liquid-fill the tiny gaps caused by the solidification shrinkage of the lower part to ensure that the aluminum layer in the top area of ​​the copper plate is dense. S9. Close the flow channel and stop the injection of aluminum liquid, thus completing the production of copper-aluminum composite ingots.

2. The method for producing copper-aluminum composite materials according to claim 1, characterized in that: In S2, the clamping device includes a base (1), on which a track groove is provided, and a mounting bracket (3) is slidably arranged inside the track groove. A sliding groove (31) is provided on the side of the mounting bracket (3), and a top plate (4) and a bottom plate (42) are slidably arranged inside the sliding groove (31). The middle part of the top plate (4) is connected to the middle part of the bottom plate (42) through a vertical electro-hydraulic push rod (41). An upper slider (5) is slidably arranged inside the horizontal sliding groove on the side of the top plate (4). A fixed clamping roller (6) is rotatably arranged on the side of the upper slider (5), and the upper slider (5) is provided with a fixed clamping roller (6). An angular velocity sensor (61) is used to detect the rotation angle or rotation speed of the fixed clamping roller (6). A lower slider (7) is slidably arranged inside the horizontal groove on the side of the bottom plate (42). A floating clamping roller (71) is rotatably arranged on the side of the lower slider (7). Horizontal electro-hydraulic push rods (8) are provided on the sides of the top plate (4) and the bottom plate (42). The upper slider (5) and the lower slider (7) are respectively connected to the corresponding horizontal electro-hydraulic push rods (8). A pressure sensor (72) is installed between the lower slider (7) and the horizontal electro-hydraulic push rod (8) to detect the lateral pressure on the floating clamping roller (71) in real time.

3. The method for producing copper-aluminum composite materials according to claim 2, characterized in that: One end of the base (1) is provided with a horizontal servo motor (2). A horizontal screw (21) is installed on the output shaft of the horizontal servo motor (2) through a coupling. The horizontal screw (21) is threadedly connected to the threaded hole at the bottom of the mounting bracket (3) to drive the mounting bracket (3) to move horizontally along the track groove of the base (1). The top of the mounting bracket (3) is provided with a longitudinal servo motor (32). A longitudinal screw (33) is installed on the output shaft of the longitudinal servo motor (32) through a coupling. The longitudinal screw (33) is threadedly connected to the screw hole in the middle of the top plate (4) to drive the top plate (4) to move longitudinally up and down along the slide groove (31) of the mounting bracket (3).

4. The method for producing copper-aluminum composite materials according to claim 3, characterized in that: In S7, after the ingot-drawing system is working, the angular velocity sensor (61) detects the rotation angle of the fixed clamping roller (6) in real time, and converts the change in angle per unit time into linear velocity to detect whether the downward speed of the copper plate is consistent with the downward speed of the support platform.

5. The method for producing copper-aluminum composite materials according to claim 4, characterized in that: In S7, after the ingot-drawing system is working, the floating clamping roller (71) is controlled by the vertical electro-hydraulic push rod (41) to perform periodic up-and-down reciprocating motion.

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