Solid-liquid cast-rolling composite production line for copper-aluminum-copper composite board

Abstract

A solid-liquid cast-rolling composite production line for a copper-aluminum-copper composite board comprises an uncoiler, a surface treatment device, a double-roller cast-rolling device, a smelting furnace, a degassing box, a front box, a feeding casting nozzle, a shearing machine and a coiling machine, the uncoiler is used for continuously conveying a copper plate strip, and the copper plate strip is conveyed to the double-roller cast-rolling device after being cleaned, dried and ground through the surface treatment device; the smelting furnace is used for continuously providing molten aluminum, the molten aluminum enters the front box for flow control after being degassed and filtered by the degassing box, and after the flow is controlled to be stable, the molten aluminum flows through the feeding casting nozzle and enters the cast-rolling area of the double-roller cast-rolling device; the molten aluminum liquid and the copper plate strip are crystallized and rolled in a cast-rolling area of the double-roller cast-rolling device to form the copper-aluminum-copper composite plate, the shearing machine is located at an outlet of the double-roller cast-rolling device, and the copper-aluminum-copper composite plate is cut by the shearing machine and then is coiled by the coiling machine. The production cost is reduced, the production efficiency is improved, and the product quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of copper-aluminum composite plate production, and specifically relates to a copper-aluminum-copper composite plate solid-liquid casting and rolling composite production line. Background Art

[0002] The main preparation methods of copper-aluminum composite plates can be divided into three types according to the basic state of the matrix during bonding: solid-solid composite method, liquid-liquid composite method, and solid-liquid composite method. The solid-liquid composite method has been developed in recent years based on the single metal casting and rolling process. The copper strip is pre-wound onto the casting and rolling roller. After the aluminum liquid enters the casting and rolling zone of the roller, heat and mass transfer occurs with the copper plate to form an intermetallic compound, achieving metallurgical bonding of the copper-aluminum interface and ensuring high-strength bonding of the copper-aluminum composite plate interface.

[0003] In the prior art, the production process of copper-aluminum composite materials is mainly solid-liquid continuous casting and rolling, and most of the products are copper-aluminum double-layer composite plates. The production of copper-aluminum-copper three-layer composite plates is relatively small. At the same time, the oxide film, oil stains and impurities formed by the oxidation of copper plates in the atmospheric environment will seriously hinder the copper and aluminum atoms and affect the copper-aluminum interface bonding performance. Therefore, the copper plate composite surface needs to be treated. At present, online cleaning and polishing of the copper plate surface have not been achieved, which affects the performance of the copper-aluminum composite plate. Summary of the invention

[0004] In order to overcome the shortcomings that the existing copper-aluminum composite plate cannot produce copper-aluminum-copper three-layer composite plates during solid-liquid composite, and the low composite strength and poor product performance caused by the oxide layer formed by surface oxidation of the copper plate and surface oil impurities, the utility model provides a copper-aluminum-copper composite plate solid-liquid casting and rolling composite production line which reduces production costs, improves production efficiency and improves product quality.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A copper-aluminum-copper composite plate solid-liquid casting and rolling composite production line comprises an uncoiler, a surface treatment device, a twin-roll casting and rolling device, a smelting furnace, a degassing box, a front box, a feeding casting nozzle, a shearing machine and a coiler. The uncoiler is used to continuously convey copper plates and strips. The copper plates and strips are conveyed to the twin-roll casting and rolling device after being cleaned, dried and polished by the surface treatment device, and are wound tightly against the rollers under the action of tension to enter the casting and rolling area. The smelting furnace is used to continuously provide molten aluminum liquid. The molten aluminum liquid enters the front box flow control after being degassed and filtered by the degassing box, and flows through the feeding casting nozzle into the casting and rolling area of ​​the twin-roll casting and rolling device after the flow rate is controlled to be stable. The molten aluminum liquid and the copper plates and strips are crystallized and rolled in the casting and rolling area of ​​the twin-roll casting and rolling device to form copper-aluminum-copper composite plates. The shearing machine is located at the outlet of the twin-roll casting and rolling device. The copper-aluminum-copper composite plates are cut by the shearing machine and then coiled by the coiler.

[0007] Furthermore, there is a copper plate strip uncoiler and a surface treatment device on both sides of the twin-roll casting and rolling device, which are used to clean, dry and polish the surfaces of the upper and lower layers of copper plates and strips and then convey them to the casting and rolling area of ​​the twin-roll casting and rolling device. Guide rollers are respectively installed between the surface treatment device and the twin-roll casting and rolling device to adjust the feeding direction of the copper plate strip.

[0008] Furthermore, the copper plate and strip surface treatment device includes a cleaning device, a drying device, and a polishing device. The cleaning device removes oil and impurities on the composite surface of the copper plate and strip by pressurized spraying of cleaning liquid and brushing with a brush roller. The drying device dries the small amount of cleaning liquid remaining on the composite surface of the copper plate and strip through a built-in hot air circulation system. The polishing device removes the composite surface oxide layer through a polishing roller to enhance the copper-aluminum bonding strength. The cleaning device, drying device, and polishing device each have a row of roller conveyor lines inside for conveying the copper plate and strip, and a conveying roller group is installed at each inlet and outlet. The two conveying rollers of the conveying roller group rotate in opposite directions and are used for conveying and guiding the copper plate.

[0009] Furthermore, the cleaning device includes two sets of high-pressure nozzles and brush rollers, which deeply scrub the composite surface of the copper plate to ensure the removal of surface impurities and oil stains. The high-pressure water pump circulates the cleaning liquid to the high-pressure nozzle for flushing the composite surface of the copper plate. An impurity filter screen is installed at the water inlet of the high-pressure water pump to prevent impurities in the flushing liquid from clogging the water inlet and the high-pressure nozzle. A wiping device is installed at the discharge end of the cleaning device to remove excess cleaning liquid on the surface of the copper plate after cleaning.

[0010] The polishing device includes a buffer mechanism, which is located directly below the polishing roller. The buffer mechanism includes an elastic member, a conveying frame and a fixed seat. A row of roller conveyor lines is installed on the conveying frame to withstand the pressure of the polishing roller and reduce the friction during the copper plate conveying process. One end of the elastic member is connected to the conveying frame, and the other end of the elastic member is connected to the fixed seat. The elastic force of the elastic member is used to drive the conveying frame to float in the vertical direction, which plays a role in buffering and adjusting the polishing force. A high-pressure jet assembly is installed at the discharge end of the polishing device to continuously deliver inert gas, which is used to remove copper chips on the surface of the copper plate and prevent the copper plate from generating an oxide layer again after polishing.

[0011] The beneficial effects of the utility model are mainly manifested in: the copper plate strip can be cleaned and polished online to remove the oxide layer and surface oil impurities formed by surface oxidation, and the bonding strength of the interface of the copper-aluminum composite plate can be enhanced. At the same time, the utility model can be used to produce copper-aluminum-copper three-layer composite plates, and continuous production can be achieved, thereby achieving the purpose of reducing production costs, improving production efficiency, and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a copper-aluminum-copper composite plate solid-liquid casting and rolling composite production line;

[0013] Figure 2 yes Figure 1 Schematic diagram of the structure of the cleaning device;

[0014] Figure 3 yes Figure 1 Schematic diagram of the structure of the grinding device;

[0015] Figure 4 yes Figure 1 A schematic diagram of the structure of the casting and rolling area of ​​the middle twin-roll casting and rolling device;

[0016] Markings in the attached drawings: 1. Uncoiler; 2. Surface treatment device; 21. Cleaning device; 211. High-pressure water pump; 212. High-pressure nozzle; 213. Brush roller; 214. Wiping device; 22. Drying device; 23. Grinding device; 231. Elastic member; 232. Conveying rack; 233. Fixed seat; 234. Grinding roller; 235. High-pressure jet assembly; 3. Twin-roll casting device; 4. Smelting furnace; 5. Degassing box; 6. Front box; 7. Feeding nozzle; 8. Shearing machine; 9. Coiler. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] Reference Figure 1 to Figure 4 A copper-aluminum-copper composite plate solid-liquid casting and rolling composite production line comprises an uncoiler 1, a surface treatment device 2, a twin-roll casting and rolling device 3, a smelting furnace 4, a degassing box 5, a front box 6, a feeding casting nozzle 7, a shearing machine 8 and a coiler 9. The uncoiler 1 is used to continuously convey copper plates and strips. The copper plates and strips are cleaned, dried and polished by the surface treatment device 2 and then conveyed to the twin-roll casting and rolling device 3. Under the action of tension, they are tightly wound around the rollers and enter the casting and rolling area. The smelting furnace 4 is used to continuously provide molten aluminum liquid. The molten aluminum liquid enters the front box 6 for flow control after degassing and filtration in the degassing box 5. After the flow rate is controlled to be stable, it flows through the feeding casting nozzle 7 and enters the casting and rolling area of ​​the twin-roll casting and rolling device 3. The molten aluminum liquid and the copper plates and strips are crystallized and rolled in the casting and rolling area of ​​the twin-roll casting and rolling device 3 to form a copper-aluminum-copper composite plate. The shearing machine 8 is located at the outlet of the twin-roll casting and rolling device 3. The copper-aluminum-copper composite plate is cut by the shearing machine 8 and then coiled by the coiler 9.

[0019] There is a copper strip unwinder 1 and a surface treatment device 2 on both sides of the twin-roll casting device 3, which are used to clean, dry and polish the surfaces of the upper and lower layers of copper strips and then transport them to the casting area of ​​the twin-roll casting device 3. Guide rollers are installed between the surface treatment device 2 and the twin-roll casting device 3 to adjust the feeding direction of the copper strip.

[0020] The copper plate and strip surface treatment device 2 includes a cleaning device 21, a drying device 22 and a polishing device 23. The cleaning device 21 removes oil and impurities on the composite surface of the copper plate and strip by pressurized spraying of cleaning liquid and brushing with a brush roller. The drying device 22 dries the small amount of cleaning liquid remaining on the composite surface of the copper plate and strip through a built-in hot air circulation system. The polishing device 23 removes the composite surface oxide layer through a polishing roller to enhance the copper-aluminum bonding strength. The cleaning device 21, the drying device 22 and the polishing device 23 are respectively provided with a row of roller conveyor lines inside for conveying the copper plate and strip, and a conveying roller group is installed at each inlet and outlet. The two conveying rollers of the conveying roller group rotate in opposite directions and are used for conveying and guiding the copper plate.

[0021] The cleaning device 21 includes two groups of high-pressure nozzles 212 and brush rollers 213. The two groups of high-pressure nozzles 212 and brush rollers 213 work simultaneously to deeply scrub the composite surface of the copper plate to ensure the removal of surface impurities and oil stains. The high-pressure water pump 211 circulates the cleaning liquid to the high-pressure nozzles 212 for flushing the composite surface of the copper plate. The water inlet of the high-pressure water pump 211 is equipped with an impurity filter screen to prevent impurities in the flushing liquid from clogging the water inlet and the high-pressure nozzle. The discharge end of the cleaning device 21 is installed with a filter to remove excess cleaning liquid on the surface of the copper plate after cleaning.

[0022] The grinding device 23 includes a buffer mechanism, which is located directly below the grinding roller 234. The buffer mechanism includes an elastic member 231, a conveying frame 232, and a fixed seat 233. A row of roller conveyor lines are installed on the conveying frame 232 to withstand the pressure of the grinding roller and reduce the friction during the copper plate conveying process. One end of the elastic member 231 is connected to the conveying frame 232, and the other end is connected to the fixed seat 233. The elastic force of the elastic member 231 can drive the conveying frame 232 to float in the vertical direction, which plays a role in buffering and adjusting the grinding intensity. A high-pressure jet assembly 235 is installed at the discharge end of the grinding device 23 to continuously deliver inert gas, which is used to remove copper chips on the surface of the copper plate and prevent the copper plate from generating an oxide layer again after grinding.

[0023] The production method implemented by the solid-liquid casting and rolling composite device of the copper-aluminum-copper composite plate of this embodiment comprises the following steps:

[0024] Step 1): Add the raw aluminum ingot into the smelting furnace for smelting treatment. After the aluminum liquid temperature reaches 720°C to 760°C, add Fe, Si and other intermediate alloys, dissolve, stir, remove slag and refine in the smelting furnace, and then pour into the holding furnace for standing and heat preservation. In this process, add grain refiner to improve the performance of aluminum liquid;

[0025] Step 2): The aluminum liquid after being kept still and heat-insulated is degassed and filtered by online processing equipment such as a degassing box, flows into the front box through the runner, and when the aluminum liquid is cooled to the casting temperature, it is introduced into the casting zone between the casting rolls through the preheated feeding nozzle;

[0026] In the step 2), the aluminum content of the aluminum liquid is greater than 98%, the pouring temperature of the aluminum liquid is 695-715° C., and the length of the casting zone is 50-70 mm;

[0027] Step 3): The copper plate is unrolled on the unwinding machine, and is sent to the cleaning device through the conveying roller group. The alkaline cleaning liquid is pressurized and sprayed onto the upper surface of the copper plate through the high-pressure nozzle, and the brush roller scrubs the surface of the copper plate. The cleaned copper plate is transported to the drying device, and the small amount of cleaning liquid remaining on the composite surface of the copper plate is dried by the built-in hot air circulation system. Finally, in the grinding device, it is polished by two grinding rollers to remove the oxide layer on the surface of the copper plate to expose fresh metal;

[0028] Step 4): The upper and lower copper strips after surface treatment are wound around the upper and lower rollers through the guide rollers, and the copper strips are preheated under the inert gas protection atmosphere. In an oxygen-free environment, the aluminum liquid and the upper and lower copper strips are contacted and crystallized in the casting and rolling area, and the heat is taken out by the cooling water circulating in the rollers. The copper-aluminum-copper composite plate is formed by the casting and rolling action of the double-roll casting and rolling device;

[0029] In the step 4), the inert gas is nitrogen; in the solid-liquid composite casting and rolling, the rolling speed of the roller is 600-1300 mm / min; the temperature of the coolant is 20°C-30°C, and the cooling rate is 300-1000°C / s;

[0030] In the step 4), the thickness of the gap between the upper and lower working rolls of the twin-roll casting device is the sum of the thickness of the double-layer copper plate strip and the thickness of the aluminum plate, the thickness of the copper-aluminum-copper composite plate is 5 to 20 mm, and the thickness ratio of the copper plate to the aluminum plate is 1:(2 to 20);

[0031] Step 5): The copper-aluminum-copper composite plate of a predetermined thickness is cut by a shearing machine and rolled by a coiler.

[0032] This embodiment can clean and polish the copper strip online to remove the oxide layer and surface oil impurities formed by surface oxidation, thereby enhancing the bonding strength of the interface of the copper-aluminum composite plate. At the same time, the utility model can be used to produce copper-aluminum-copper three-layer composite plates, and continuous production can be achieved, thereby achieving the purpose of reducing production costs, improving production efficiency, and improving product quality.

[0033] The contents described in the embodiments of this specification are merely enumerations of implementation forms of the utility model concept and are for illustrative purposes only. The protection scope of the utility model should not be considered to be limited to the specific forms described in this embodiment, and the protection scope of the utility model also extends to equivalent technical means that ordinary technicians in this field can think of based on the concept of the utility model.

Claims

1. A copper-aluminum-copper composite plate solid-liquid casting and rolling composite production line, characterized in that: The production line includes an uncoiler, a surface treatment device, a twin-roll casting device, a smelting furnace, a degassing box, a front box, a feeding nozzle, a shearing machine and a coiler. The uncoiler is used to continuously convey copper plates and strips. The copper plates and strips are conveyed to the twin-roll casting device after being cleaned, dried and polished by the surface treatment device, and are wound tightly against the rollers under the action of tension to enter the casting and rolling area. The smelting furnace is used to continuously provide molten aluminum liquid. The molten aluminum liquid enters the front box flow control after being degassed and filtered in the degassing box. After the flow rate is controlled to be stable, it flows through the feeding nozzle and enters the casting and rolling area of ​​the twin-roll casting and rolling device. The molten aluminum liquid and the copper plates and strips are crystallized and rolled in the casting and rolling area of ​​the twin-roll casting and rolling device to form a copper-aluminum-copper composite plate. The shearing machine is located at the outlet of the twin-roll casting and rolling device. The copper-aluminum-copper composite plate is cut by the shearing machine and then coiled by the coiler.

2. A copper-aluminum-copper composite plate solid-liquid casting and rolling composite production line as claimed in claim 1, characterized in that: There is a copper plate and strip uncoiler and a surface treatment device on both sides of the twin-roll casting and rolling device, which are used to clean, dry and polish the surfaces of the upper and lower layers of copper plates and strips and then convey them to the casting and rolling area of ​​the twin-roll casting and rolling device. Guide rollers are installed between the surface treatment device and the twin-roll casting and rolling device to adjust the feeding direction of the copper plate and strip.

3. A copper-aluminum-copper composite plate solid-liquid casting and rolling composite production line as claimed in claim 1 or 2, characterized in that: The surface treatment device includes a cleaning device, a drying device, and a polishing device. The cleaning device removes oil and impurities on the composite surface of the copper plate and strip by pressurized spraying of cleaning liquid and brushing with a brush roller. The drying device dries a small amount of residual cleaning liquid on the composite surface of the copper plate and strip through a built-in hot air circulation system. The polishing device removes the composite surface oxide layer through a polishing roller to enhance the copper-aluminum bonding strength. The cleaning device, drying device, and polishing device are each internally provided with a row of roller conveyor lines for conveying the copper plate and strip, and a conveyor roller group is each installed at the inlet and outlet. The two conveyor rollers of the conveyor roller group rotate in opposite directions and are used for conveying and guiding the copper plate.

4. A copper-aluminum-copper composite plate solid-liquid casting and rolling composite production line as claimed in claim 3, characterized in that: The cleaning device includes two groups of high-pressure nozzles and a brush roller. The high-pressure water pump circulates the cleaning liquid to the high-pressure nozzle for flushing the composite surface of the copper plate. The water inlet of the high-pressure water pump is equipped with an impurity filter screen to prevent impurities in the flushing liquid from clogging the water inlet and the high-pressure nozzle. The discharge end of the cleaning device is installed with a wiping device to remove excess cleaning liquid on the surface of the copper plate after cleaning.

5. A copper-aluminum-copper composite plate solid-liquid casting and rolling composite production line as claimed in claim 3, characterized in that: The grinding device includes a buffer mechanism, which is located directly below the grinding roller. The buffer mechanism includes an elastic member, a conveying frame and a fixed seat. A row of roller conveyor lines is installed on the conveying frame. One end of the elastic member is connected to the conveying frame, and the other end of the elastic member is connected to the fixed seat. The elastic force of the elastic member is used to drive the conveying frame to float in the vertical direction, which plays a role in buffering and adjusting the grinding force. A high-pressure jet assembly is installed at the discharge end of the grinding device to continuously deliver inert gas, which is used to remove copper chips on the surface of the copper plate and prevent the copper plate from generating an oxide layer again after grinding.

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