A copper plate surface online pretreatment production line for copper-aluminum composite plate production

Abstract

A copper plate surface online pretreatment production line for copper-aluminum composite plate production includes an unwinding device, a cleaning device, a drying device, a grinding device and a double-roll casting device arranged in sequence, the discharge end of the unwinding device is connected to the cleaning device, the cleaning device includes a first roller conveyor line for bearing and moving the copper plate, a water spray assembly and a brush roller for cleaning the composite surface of the copper plate, and the water spray assembly and the brush roller are located on the upper part of the first roller conveyor line; the drying device is located at the discharge end of the cleaning device, including a second roller conveyor line for bearing and moving the copper plate, a heating wire for heating and drying, and an air nozzle for air circulation; the grinding device is located at the discharge end of the drying device, including a grinding roller for grinding the composite surface of the copper plate to remove the oxide layer and a buffer mechanism to prevent the grinding roller from over-grinding, the grinding roller is located above the buffer mechanism, and the discharge end of the grinding device is connected to the double-roll casting device. The utility model improves product performance and work efficiency.

Description

Technical Field

[0001] The utility model belongs to the field of bimetallic composite materials, and in particular relates to an online pretreatment production line for the surface of a copper plate used in the production of a copper-aluminum composite plate. Background Art

[0002] Copper-aluminum composite plate is a new type of composite material prepared by combining copper and aluminum through various bimetallic composite technologies. Compared with single copper and aluminum materials, copper-aluminum composite materials combine the advantages of high electrical conductivity and high thermal conductivity of copper and low density and low cost of aluminum. They are widely used in electronics, electrical, machinery, metallurgy, automobiles, new energy and other fields. 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.

[0003] 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 area of ​​the roller, heat and mass transfer occurs with the copper plate to form intermetallic compounds, achieving metallurgical bonding at the copper-aluminum interface and ensuring high-strength bonding at the interface of the copper-aluminum composite plate.

[0004] However, since copper plates are easily oxidized in the atmospheric environment to form an oxide film on the surface, the presence of the oxide film will seriously hinder the interaction between copper and aluminum atoms. At the same time, oil stains, impurities, etc. on the surface will also affect the bonding process of copper and aluminum. Therefore, pretreatment of the copper plate composite surface by physical or chemical methods is a key link in the preparation of copper-aluminum interface eutectic composite plates. Summary of the invention

[0005] In order to overcome the problems of low composite strength, poor product performance and low work efficiency caused by the oxide layer formed by oxidation of the copper plate surface and surface oil impurities in the existing copper-aluminum composite plate solid-liquid composite method, the present invention provides an online pretreatment production line for the surface of copper plates for the production of copper-aluminum composite plates with high composite strength, improved product performance and improved work efficiency.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A copper plate surface online pretreatment production line for copper-aluminum composite plate production comprises an unwinding device, a cleaning device, a drying device, a grinding device and a twin-roll casting device which are arranged in sequence, wherein the discharge end of the unwinding device is connected to the cleaning device, the cleaning device comprises a first roller conveyor line for bearing and moving the copper plate, a water spray assembly and a brush roller for cleaning the composite surface of the copper plate, the water spray assembly and the brush roller are located on the upper part of the first roller conveyor line; the drying device is located at the discharge end of the cleaning device, the drying device comprises a second roller conveyor line for bearing and moving the copper plate, a heating wire for heating and drying, and an air nozzle for air circulation; the grinding device is located at the discharge end of the drying device, the grinding device comprises a grinding roller for grinding the composite surface of the copper plate to remove an oxide layer and a buffer mechanism for preventing the grinding roller from over-grinding, the grinding roller is located above the buffer mechanism, and the discharge end of the grinding device is connected to the twin-roll casting device.

[0008] Furthermore, the unwinding device, cleaning device, drying device, grinding device, and twin-roll casting device are arranged in sequence from left to right, and there is a conveying roller group between every two devices. The two conveying rollers of the conveying roller group rotate in opposite directions and the roller surface is smooth, which is used for conveying and guiding copper plates; the heating wire is located below the second roller conveying line, and the air nozzle is located above the second roller conveying line.

[0009] Or: the cleaning device, drying device, and polishing device are arranged vertically in sequence, a guide roller is installed between the cleaning device and the drying device, a guide roller is installed between the drying device and the polishing device, the heating wire is located above the second roller conveyor line, and the air nozzle is located below the second roller conveyor line.

[0010] Furthermore, the water spray assembly of the cleaning device includes a high-pressure water pump and a high-pressure nozzle. 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.

[0011] Furthermore, the cleaning device relies on two sets of high-pressure nozzles and brush rollers to work simultaneously to deeply scrub the composite surface of the copper plate to ensure the removal of surface impurities and oil stains. 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.

[0012] Preferably, the brush material of the brush roller is nylon wire added with silicon carbide or aluminum oxide abrasive, the rotation direction is opposite to the movement direction of the copper plate, the wiping device is a water-absorbing sponge block, and the cleaning liquid is an alkaline degreasing liquid at 50°C to 70°C.

[0013] The brush wire of the grinding roller of the grinding device is made of steel wire. The rotation direction of the grinding roller is opposite to the movement direction of the copper plate. A high-pressure jet assembly is installed at the discharge end of the grinding device. The high-pressure jet assembly continuously delivers inert gas to remove copper chips on the surface of the copper plate and prevent the copper plate from generating an oxide layer again after grinding.

[0014] The buffer mechanism of the grinding device 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 are installed on the conveying frame to withstand the pressure of the grinding 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 drives the conveying frame to float in the vertical direction, which plays a role in buffering and adjusting the grinding force.

[0015] Inert gas is filled between the grinding device and the twin-roll casting device to form an inert gas protective layer to prevent the ground copper plate from being oxidized again during transportation. A guide roller is installed at the front end of the twin-roll casting device to adjust the position and direction of the copper plate wrapped around the casting roller.

[0016] The scheme of the utility model removes the oxide layer and surface oil impurities formed by oxidation of the copper plate surface online when the copper-aluminum composite plate is prepared by the solid-liquid casting and rolling method, forms an intermetallic compound at the copper-aluminum interface layer, realizes the metallurgical bonding of the copper-aluminum interface, and ensures the high-strength bonding of the copper-aluminum composite plate interface. Compared with the existing copper-aluminum composite plate production method, the copper plate can be cleaned and polished under the condition of being cleaned and polished, which can enhance the comprehensive performance of the copper-aluminum composite plate and improve the production efficiency.

[0017] The beneficial effects of the utility model are mainly manifested in: high composite strength, improved product performance, and improved work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of an online pretreatment production line for the surface of a copper plate for producing a copper-aluminum composite plate according to Example 1.

[0019] Figure 2 It is a schematic diagram of the cleaning device structure;

[0020] Figure 3 is a schematic diagram of the grinding device structure;

[0021] Figure 4 This is a schematic diagram of an online pretreatment production line for the surface of a copper plate for producing a copper-aluminum composite plate according to Example 2. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings.

[0023] Example 1

[0024] Reference Figure 1 to Figure 3 , an online pretreatment production line for the surface of a copper plate for the production of a copper-aluminum composite plate, comprising an unwinding device 1, a cleaning device 2, a drying device 3 located at the discharge end of the cleaning device 2 and a grinding device 4 located at the discharge end of the drying device 3, and a double-roll casting device 5, wherein the cleaning device 1 comprises a first roller conveyor line 23 for bearing and moving the copper plate, a water spray assembly 20 and a brush roller 24 for cleaning the composite surface of the copper plate, the drying device 3 comprises a second roller conveyor line 32 for bearing and moving the copper plate, a heating wire 33 for heating and drying, and an air nozzle 31 for air circulation, the grinding device 4 comprises a grinding roller 44 for grinding the composite surface of the copper plate to remove an oxide layer and a buffer mechanism 40 for preventing the grinding roller from over-grinding, and the grinding roller 44 is located above the buffer mechanism 40.

[0025] In this embodiment, the unwinding device 1, the cleaning device 2, the drying device 3, the grinding device 4, and the twin-roll casting device 5 are arranged in sequence from left to right, and there is a conveying roller group 6 between each two devices. The two conveying rollers of the conveying roller group 6 have opposite rotation directions and smooth roller surfaces, and are used for conveying and guiding copper plates.

[0026] like Figure 2 As shown, the water spray assembly 20 of the cleaning device 2 includes a high-pressure water pump 21 and a high-pressure nozzle 22. The high-pressure water pump 21 circulates the cleaning liquid to the high-pressure nozzle 22 for washing the composite surface of the copper plate. An impurity filter screen is installed at the water inlet of the high-pressure water pump 21 to prevent impurities in the washing liquid from clogging the water inlet and the high-pressure nozzle.

[0027] Furthermore, the cleaning device 2 relies on two sets of high-pressure nozzles 22 and brush rollers 23 to work simultaneously to deeply scrub the composite surface of the copper plate to ensure the removal of surface impurities and oil stains. A wiping device 25 is installed at the discharge end of the cleaning device 2 to remove excess cleaning liquid on the surface of the copper plate after cleaning.

[0028] Preferably, the brush material of the brush roller 23 is nylon wire added with abrasives such as silicon carbide or aluminum oxide, and the rotation direction is opposite to the movement direction of the copper plate. The wiping device 25 group is composed of a water-absorbing sponge block, and the cleaning liquid is an alkaline degreasing liquid at 50°C to 70°C.

[0029] Preferably, the heating wire 33 of the drying device 3 heats the internal temperature of the entire device to 70-80°C.

[0030] like Figure 3As shown, the brush wire of the grinding roller 44 of the grinding device 4 is made of steel wire, and the rotation direction of the grinding roller 44 is opposite to the movement direction of the copper plate. A high-pressure jet component 45 is installed at the discharge end of the grinding device 44. The high-pressure jet component 45 continuously delivers inert gas to remove copper chips on the surface of the copper plate and prevent the copper plate from generating an oxide layer again after grinding.

[0031] Furthermore, the buffer mechanism 40 of the grinding device 4 is located directly below the grinding roller 44. The buffer mechanism 40 includes an elastic member 41, a conveying frame 42, and a fixed seat 43. A row of roller conveyor lines is installed on the conveying frame 42 to withstand the pressure of the grinding roller and reduce the friction during the copper plate conveying process. One end of the elastic member 41 is connected to the conveying frame 42, and the other end is connected to the fixed seat 43. The elastic force of the elastic member 41 can drive the conveying frame 42 to float in the vertical direction, thereby playing a role in buffering and adjusting the grinding force.

[0032] Furthermore, an inert gas is filled between the grinding device 4 and the twin-roll casting device 5 to form an inert gas protective layer to prevent the ground copper plate from being oxidized again during transportation. A guide roller 7 is installed at the front end of the twin-roll casting device 5 to adjust the position and direction of the copper plate wrapped around the casting roller.

[0033] The working process of this embodiment includes the following steps:

[0034] Step 1: The copper plate is unrolled on the unwinding device 1, and is sent to the cleaning device 2 through the first roller conveyor line 23;

[0035] Step 2: Inside the cleaning device 2, the cleaning liquid is sprayed onto the surface of the copper plate through a high-pressure nozzle, and the brush roller scrubs the surface of the copper plate. After two spraying and scrubbing, the copper plate passes through a sponge block to remove excess cleaning liquid, and the cleaned copper plate passes through a second roller conveyor line 32 to send the copper plate to the drying device 3;

[0036] Step 3: In the drying device 3, the heating wire installed inside is powered on for heating, and air is continuously introduced through the air nozzle. Through the dual effects of heating and circulating air, a small amount of cleaning liquid on the surface of the copper plate is dried, and the dried copper plate is sent to the polishing device 4 through the third guide roller group;

[0037] Step 4: In the grinding device 4, two grinding rollers are used to grind and remove the oxide layer on the surface of the copper plate to expose fresh metal. Then, it is wound on the casting roller under the protective atmosphere of the inert gas layer and sent to the casting area. The ground surface of the copper strip is contacted with semi-molten aluminum liquid to carry out oxygen-free continuous casting and rolling to obtain a copper-aluminum composite strip blank.

[0038] In this embodiment, when the copper-aluminum composite plate is prepared by the solid-liquid casting and rolling method, the oxide layer and surface oil impurities formed by oxidation of the copper plate surface are removed online, and intermetallic compounds are formed in the copper-aluminum interface layer to achieve metallurgical bonding of the copper-aluminum interface, thereby ensuring high-strength bonding of the copper-aluminum composite plate interface and improving production efficiency.

[0039] Example 2

[0040] like Figure 4 Another copper plate surface online pretreatment production line for the production of copper-aluminum composite panels is shown. On the basis of Example 1, the difference from Example 1 is that the positions of the uncoiling device, the cleaning device, the drying device, the grinding device, and the twin-roll casting device extend in the vertical direction to reduce the horizontal layout.

[0041] Specifically, Figure 4 As shown, the cleaning device 2, the drying device 3, and the polishing device 4 are arranged in the direction shown in the figure, a guide roller 8 is installed between the cleaning device 2 and the drying device 3, and a guide roller 9 is installed between the drying device 3 and the polishing device 4 for guiding the copper plate.

[0042] Specifically, in the drying device 3, in order to ensure that the dried surface is the surface cleaned by the cleaning device 2, the heating wire 33 and the air nozzle 31 are exchanged, and the heating wire 33 is placed at the upper end and the air nozzle 31 is placed at the lower end.

[0043] The remaining features and principles of this embodiment are consistent with those of Embodiment 1.

[0044] In this embodiment, the online pretreatment production line for the surface of the copper plate used in the production of the copper-aluminum composite plate is extended in the vertical direction to reduce the horizontal layout. While ensuring the high-strength bonding of the interface of the copper-aluminum composite plate and improving the production efficiency, it saves floor space and makes the utility model more widely used.

[0045] 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 plate surface online pretreatment production line for copper-aluminum composite plate production, characterized in that: The production line includes an unwinding device, a cleaning device, a drying device, a grinding device and a twin-roll casting device which are arranged in sequence. The discharge end of the unwinding device is connected to the cleaning device. The cleaning device includes a first roller conveyor line for bearing and moving the copper plate, a water spray assembly and a brush roller for cleaning the composite surface of the copper plate, and the water spray assembly and the brush roller are located on the upper part of the first roller conveyor line; the drying device is located at the discharge end of the cleaning device, and the drying device includes a second roller conveyor line for bearing and moving the copper plate, a heating wire for heating and drying, and an air nozzle for air circulation; the grinding device is located at the discharge end of the drying device, and the grinding device includes a grinding roller for grinding the composite surface of the copper plate to remove the oxide layer and a buffer mechanism for preventing the grinding roller from over-grinding, and the grinding roller is located above the buffer mechanism. The discharge end of the grinding device is connected to the twin-roll casting device.

2. The online surface pretreatment production line of a copper plate for producing a copper-aluminum composite plate according to claim 1, characterized in that: The unwinding device, cleaning device, drying device, grinding device, and twin-roll casting device are arranged in sequence from left to right, and there is a conveying roller group between every two devices. The two conveying rollers of the conveying roller group rotate in opposite directions and the roller surfaces are smooth, and are used for conveying and guiding copper plates; the heating wire is located below the second roller conveying line, and the air nozzle is located above the second roller conveying line.

3. The online surface pretreatment production line of a copper plate for producing a copper-aluminum composite plate according to claim 1, characterized in that: The cleaning device, drying device and polishing device are arranged vertically in sequence, a guide roller is installed between the cleaning device and the drying device, and a guide roller is installed between the drying device and the polishing device. The heating wire is located above the second roller conveyor line, and the air nozzle is located below the second roller conveyor line.

4. The online surface pretreatment production line of copper plate for producing copper-aluminum composite plate according to any one of claims 1 to 3, characterized in that: The water spray assembly of the cleaning device includes a high-pressure water pump and a high-pressure nozzle. The high-pressure water pump circulates the cleaning liquid to the high-pressure nozzle for washing 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 washing liquid from clogging the water inlet and the high-pressure nozzle.

5. The online surface pretreatment production line of copper plate for producing copper-aluminum composite plate according to claim 4, characterized in that: The cleaning device relies on two sets of high-pressure nozzles and brush rollers to work simultaneously to deeply scrub the composite surface of the copper plate to ensure the removal of surface impurities and oil stains. 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.

6. The online surface pretreatment production line of copper plate for producing copper-aluminum composite plate according to claim 5, characterized in that: The brush of the brush roller is made of nylon wire with silicon carbide or aluminum oxide abrasive added, and the rotation direction is opposite to the movement direction of the copper plate. The wiping device is a water-absorbing sponge block, and the cleaning liquid is an alkaline degreasing liquid at 50°C to 70°C.

7. The online surface pretreatment production line of copper plate for producing copper-aluminum composite plate according to any one of claims 1 to 3, characterized in that: The brush wire of the grinding roller of the grinding device is made of steel wire. The rotation direction of the grinding roller is opposite to the movement direction of the copper plate. A high-pressure jet assembly is installed at the discharge end of the grinding device. The high-pressure jet assembly continuously delivers inert gas to remove copper chips on the surface of the copper plate and prevent the copper plate from generating an oxide layer again after grinding.

8. The online surface pretreatment production line of copper plate for producing copper-aluminum composite plate according to any one of claims 1 to 3, characterized in that: The buffer mechanism of the grinding device 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 are installed on the conveying frame to withstand the pressure of the grinding 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 drives the conveying frame to float in the vertical direction, which plays a role in buffering and adjusting the grinding force.

9. The online surface pretreatment production line of copper plate for producing copper-aluminum composite plate according to claim 7, characterized in that: Inert gas is filled between the grinding device and the twin-roll casting device to form an inert gas protective layer to prevent the ground copper plate from being oxidized again during transportation. A guide roller is installed at the front end of the twin-roll casting device to adjust the position and direction of the copper plate wrapped around the casting roller.

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