A copper-aluminum composite plate strip pressing device and a pressing method thereof

Abstract

The application discloses a copper-aluminum composite plate strip pressing device, which is characterized in that a first magnetic working substance ring and a first magnetic field generator are arranged in the interior of a pressing roller, a second magnetic working substance ring and a second magnetic field generator are arranged in the interior of a conveying roller, the first magnetic working substance ring is used to realize the cooling effect in the interior of the pressing roller, the cylindrical structure of the first magnetic working substance ring can uniformly transmit heat to realize better cooling effect, and the water circulation cooling in the prior art is more stable and uniform, and the pressing rolling effect is improved; a second motor on an adjusting block is used to drive the rotation of a gear and a gear ring, thereby adjusting the pressing position between adjacent adjusting rings, adjusting the spacing between the pressing rollers, adjusting the rod by hydraulic pressure of a hydraulic cylinder, and driving the movement of a sleeve ring, thereby realizing the movement adjustment of the adjusting ring, so that the pressing rolling of copper-aluminum composite plates with different widths can be adapted, and the application range is improved.

Description

Technical Field

[0001] This application relates to the field of copper-aluminum composite plate technology, and in particular to a pressing device and pressing method for copper-aluminum composite plate strips. Background Technology

[0002] Copper-aluminum composite strips are a commonly used type of metal composite sheet, made by combining copper and aluminum. Manufacturing methods include solid-liquid composite, solid-solid composite, and liquid-liquid composite methods, with the solid-liquid composite method being the most prevalent. In the solid-liquid composite method, oxygen-free casting and rolling are often used: semi-solid molten aluminum and treated copper strips are brought into full contact and pressed together through rolls to form the composite strip. Existing methods are divided into horizontal and vertical types, but their principles are the same: rapid cooling and rolling within the casting and rolling zone achieves interfacial metallurgical bonding. However, the pressing and rolling equipment used in actual applications still has certain shortcomings.

[0003] Firstly, when using it for pressing and rolling, the pressure between the rolls is mainly used to press the copper strip and aluminum together to form a composite plate. At the same time, cooling is required during the pressing process to achieve a good pressing and rolling effect. The existing cooling measures use channels in the rolls to guide cooling water. However, the design of the cooling water channels makes it impossible to achieve the best possible uniformity. Furthermore, during the guiding process, due to the tortuosity of the channels and the changes in the diameter, the cooling water cannot be completely carried away, thus reducing the cooling effect and affecting the subsequent pressing and rolling effect.

[0004] Secondly, when using its rolls for pressing and rolling, the rotation of two rolls is used to squeeze the copper strip and semi-solid aluminum liquid together. However, depending on different conditions, it is necessary to press and roll composite strips of different thicknesses. At the same time, the existing roll adjustment method is not very precise, and the two sides of the composite strip are not restricted during the pressing and rolling process, which causes the composite strips to deviate or have excessively large edges, which also affects the production quality of the composite strips. A lot of trimming and processing is required afterward. Summary of the Invention

[0005] This application proposes a pressing device for copper-aluminum composite strips, which has the advantages of good pressing effect and high adjustability, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application adopts the following technical solution: a pressing device for copper-aluminum composite strip, comprising two frames symmetrically arranged front and rear, two conveying rollers symmetrically rotatably mounted at the top of the frames, a second magnetic field generator fixedly mounted at the central shaft inside the conveying rollers, a second magnetic working ring fixedly mounted at the middle ring position inside the conveying rollers, symmetrically opened grooves on the inner side of the middle part of the frames, adjusting blocks slidably sleeved inside the grooves, a pressure roller rotatably mounted between the two symmetrical adjusting blocks, a first magnetic working ring fixedly mounted at the central shaft inside the pressure roller, a first magnetic field generator fixedly mounted at the middle ring position inside the pressure roller, a first motor fixedly mounted on the outer side of the adjusting blocks, and the output end of the first motor fixedly connected to the end of the pressure roller, a conductive ring rotatably sleeved on the outer ring of the end of the pressure roller, hydraulic devices fixedly mounted at both ends of the outer side of the frames, a hydraulic rod fixedly connected to the side of the adjusting block, and the hydraulic rod movably sleeved inside the frames and subjected to the hydraulic pressure of the hydraulic device.

[0007] Furthermore, a conductive ring is also provided at the end of the conveying roller. Both the first magnetic field generator and the second magnetic field generator are connected to the power supply through the conductive ring. A heat exchange medium is connected between the first magnetic working fluid ring and the second magnetic working fluid ring through the pressure roller and the conveying roller.

[0008] Furthermore, the diameter of the conveying roller is larger than that of the pressure roller, and the outer surface of the conveying roller contacts the polished copper strip. The first magnetic field generator generates a gradually decreasing magnetic field, and the second magnetic field generator generates a gradually increasing magnetic field.

[0009] Furthermore, adjusting rings are rotatably sleeved at both ends of the pressure roller. A toothed ring is fixedly installed on the side of the adjusting ring near the adjusting block. A limiting ring is fixedly installed on the side of the adjusting block near the pressure roller, and the toothed ring is sleeved on the outer ring of the limiting ring. A second motor is fixedly installed inside the adjusting block at a position on one side of the output shaft of the first motor. The output end of the second motor extends out of the adjusting block and is fixedly installed with a gear. The gear meshes with the toothed ring for transmission.

[0010] Furthermore, a collar is rotatably sleeved on the outer ring of the middle part of the adjusting ring, and an adjusting rod is fixedly connected to the top of the outer ring of the collar. A hydraulic cylinder is movably installed between the two adjusting rods. A movable groove is opened at the top of the inner side of the frame, and the end of the adjusting rod is slidably sleeved into the movable groove.

[0011] Furthermore, the gear ring is coaxial with the pressure roller, while the adjusting ring is not coaxial with the pressure roller, and the hydraulic change of the hydraulic cylinder causes the gear to not rotate.

[0012] A method for pressing copper-aluminum composite strips includes the following steps:

[0013] S1. Let the high-temperature aluminum liquid stand for a period of time, and then pour it into the casting nozzle. After cooling and crystallization, a semi-molten and semi-solid aluminum liquid is obtained.

[0014] S2. The copper strip is laser cleaned in a protective gas environment until there is no grease or oxide layer on the surface. Then it is placed on the conveyor roller for conveying. At the same time, the second magnetic working ring inside the conveyor roller generates heat and transfers it to the copper strip, heating it to a certain temperature.

[0015] S3. Two copper strips are conveyed by conveyor rollers in an oxygen-free environment, and semi-solid aluminum liquid is poured into the middle position to make full contact. Then, they are conveyed to the pressure roller for extrusion and rolling. The first magnetic working ring inside the pressure roller absorbs heat, thereby cooling the composite strip being rolled.

[0016] S4. The rotation of the gear ring is adjusted by the second motor, thereby driving the adjustment ring to rotate. The distance between the pressure rollers is adjusted according to the pressure between two adjacent adjustment rings. After the adjustment is completed, the hydraulic pressure of the hydraulic device is used to ensure the stability of the position of the adjustment block.

[0017] S5. The hydraulic cylinder drives the adjusting rod to extend and retract, and the adjusting rod drives the collar and adjusting ring to move, thereby adjusting the distance between the adjusting rings at both ends to adapt to the pressing and rolling of copper-aluminum composite plates of different widths.

[0018] This application provides a pressing device for copper-aluminum composite strips. By setting a first magnetic working ring and a first magnetic field generator inside the pressure roller, and setting a second magnetic working ring and a second magnetic field generator inside the conveyor roller, compared with the prior art, the first magnetic working ring inside the pressure roller achieves a cooling effect, and the cylindrical structure of the first magnetic working ring can evenly transfer heat to achieve a better cooling effect. Furthermore, the second magnetic working ring inside the conveyor roller releases heat to heat the copper strip. This is not only more stable and uniform than the water circulation cooling in the prior art, but also ensures full utilization of energy and improves the pressing and rolling effect.

[0019] By setting adjusting blocks at both ends of the pressure roller and attaching adjusting rings to the outer rings of the ends of the pressure rollers, compared with the prior art, a second motor on the adjusting block drives the gear and gear ring to rotate, thereby adjusting the pressing position between adjacent adjusting rings and thus adjusting the distance between the pressure rollers. Furthermore, the adjustment blocks are adjusted synchronously with hydraulic rods and hydraulic devices on their sides to ensure stability. At the same time, a collar is set on the outer ring of the adjusting ring. The hydraulic cylinder adjusts the adjusting rod and drives the collar to move, thereby realizing the movement adjustment of the adjusting ring. This can adapt to the pressing and rolling of copper-aluminum composite plates of different widths, ensuring that they are pressed stably and vertically, and also avoiding excessive waste on both sides. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0021] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a partial cross-sectional view of the overall structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the pressing device of the present invention;

[0025] Figure 4 This is a top view of the pressing device structure of the present invention;

[0026] Figure 5 This is a front view of the pressing device structure of the present invention;

[0027] Figure 6 for Figure 4 Sectional view of AA in the middle;

[0028] Figure 7 for Figure 4 Cross-sectional view of the middle section (BB);

[0029] Figure 8 for Figure 5 CC section view;

[0030] Figure 9 This is a schematic diagram of the overall installation of the single roller structure of the present invention;

[0031] Figure 10 This is a schematic diagram of the adjusting rotating ring structure of the present invention;

[0032] Figure 11 for Figure 8 Enlarged view of point D in the middle.

[0033] The components are as follows: 1. Frame; 101. Slide groove; 102. Movable groove; 2. Conveyor roller; 3. Adjusting block; 4. Pressure roller; 5. First magnetic working fluid ring; 6. First magnetic field generator; 7. Second magnetic working fluid ring; 8. Second magnetic field generator; 9. First motor; 10. Conductive ring; 11. Hydraulic rod; 12. Hydraulic device; 13. Adjusting rotating ring; 14. Gear ring; 15. Limiting ring; 16. Second motor; 17. Gear; 18. Collar; 19. Adjusting rod; 20. Hydraulic cylinder. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0035] Please see Figures 1-9A pressing device for copper-aluminum composite strip includes two frames symmetrically arranged front and rear. Two conveyor rollers 2 are symmetrically rotatably mounted on the top of the frames 1. A second magnetic field generator 8 is fixedly mounted on the central shaft inside the conveyor rollers 2. A second magnetic working fluid ring 7 is fixedly mounted in the middle ring position inside the conveyor rollers 2. A sliding groove 101 is symmetrically opened on the inner side of the middle part of the frames 1. An adjusting block 3 is slidably sleeved inside the sliding groove 101. A pressure roller 4 is rotatably mounted between the two symmetrical adjusting blocks 3. A first magnetic working fluid ring 5 is fixedly mounted on the central shaft inside the pressure roller 4. A first magnetic field generator 6 is fixedly mounted in the middle ring position inside the pressure roller 4. The entire device is vertically arranged, and a copper strip is conveyed on each side, with semi-solid aluminum liquid injected in the middle position. The process of forming aluminum strips is carried out in an oxygen-free environment to prevent oxidation of the treated copper strip surface after heating. A first motor 9 is fixedly mounted on the outside of the adjusting block 3, and its output end is fixedly connected to the end of the pressure roller 4. A conductive ring 10 is rotatably fitted onto the outer ring of the pressure roller 4. The conductive ring 10 conducts electricity, providing power to the first magnetic field generator 6 and the second magnetic field generator 8 to generate changing magnetic fields. Hydraulic actuators 12 are fixedly mounted at both ends of the outer side of the frame 1. A hydraulic rod 11 is fixedly connected to the side of the adjusting block 3, and the hydraulic rod 11 is movably fitted inside the frame 1 and subjected to hydraulic pressure from the hydraulic actuator 12. The hydraulic rod 11 controls the movement of the adjusting block 3, thereby adjusting the pressure roller 4. The spacing between them can also be stabilized by hydraulic pressure after adjustment. The hydraulic actuator 12 generally does not need to be actively driven to adjust the position of the adjusting block 3. Once the adjusting ring 13 has rotated to the appropriate position, it can be stabilized by the hydraulic actuator 12. Simultaneously, the hydraulic rod 11, the hydraulic actuator 12, and the adjusting ring 13 provide a certain degree of protection and emergency response. While both can be adjusted independently, the adjustment via the adjusting ring 13 is more stable and precise. A conductive ring 10 is also provided at the end of the conveyor roller 2. Both the first magnetic field generator 6 and the second magnetic field generator 8 are connected to the power supply via the conductive ring 10. A heat exchange medium connects the first magnetic working fluid ring 5 and the second magnetic working fluid ring 7 through the pressure roller 4 and the conveyor roller 2. The working fluid ring 5 and the second magnetic working fluid ring 7 can be made of Gd and LaFeCoSi based compounds, which are two materials with good magnetic cooling effects. The first magnetic field generator 6 and the second magnetic field generator 8 generate magnetic fields respectively. At the same time, the first magnetic working fluid ring 5 and the second magnetic working fluid ring 7 are placed in the magnetic fields generated by the first magnetic field generator 6 and the second magnetic field generator 8 respectively. In this way, after the magnetic fields on the first magnetic field generator 6 and the second magnetic field generator 8 change, the first magnetic working fluid ring 5 and the second magnetic working fluid ring 7 will produce heat absorption and heat release effects respectively. This achieves a cooling effect on the pressure roller 4, which can quickly cool down the composite plate being pressed and rolled. At the same time, the copper strip is heated on the conveyor roller 2 to better contact the semi-solid aluminum liquid.The diameter of the conveyor roller 2 is larger than that of the pressure roller 4, and the outer surface of the conveyor roller 2 contacts the polished copper strip. This allows the copper strip on the surface of the conveyor roller 2 to be successfully heated throughout the process. The first magnetic field generator 6 generates a gradually decreasing magnetic field, while the second magnetic field generator 8 generates a gradually increasing magnetic field. According to the principle of magnetic refrigeration, the magnetic field of the first magnetic working ring 5 continuously weakens, thus the first magnetic working ring 5 absorbs heat. Similarly, heat is released on the second magnetic working ring 7. This heat transfer is achieved through changes in the magnetic field, and the heat is fully utilized in different process steps. Furthermore, since the first magnetic working ring 5 and the second magnetic working ring 7 are cylindrical, temperature transfer can be achieved uniformly, resulting in more uniform cooling and heating effects.

[0036] Please see Figures 3-11Adjusting rings 13 are rotatably sleeved at both ends of the pressure roller 4. A toothed ring 14 is fixedly installed on the side of the adjusting ring 13 near the adjusting block 3. A limiting ring 15 is fixedly installed on the side of the adjusting block 3 near the pressure roller 4, and the toothed ring 14 is sleeved on the outer ring of the limiting ring 15. The limiting ring 15 limits the toothed ring 14 to a certain extent, so that the toothed ring 14 can be stable when it is driven to rotate. At the same time, the toothed ring 14 will move with the adjusting ring 13. Therefore, the limiting ring 15 can also ensure that the sliding of the toothed ring 14 is along the axis, ensuring adjustment accuracy. A second motor 16 is fixedly installed inside the adjusting block 3 at a position on one side of the output shaft of the first motor 9. The output end of the second motor 16 extends to A gear 17 is fixedly installed on the outside of the adjusting block 3. The gear 17 meshes with the gear ring 14 for transmission. The second motor 16 drives the gear 17 to rotate, which in turn drives the gear ring 14 to rotate. The rotation of the gear ring 14 also drives the adjusting ring 13 to rotate synchronously. This allows the adjusting rings 13 to contact and press against each other, and drives the pressure roller 4 to move along the direction of the slide groove 101. This also drives the adjusting block 3 to move as a whole, thus realizing the adjustment of the distance between the two pressure rollers 4 to adapt to the pressing and rolling of copper-aluminum composite plates with different thickness requirements. A collar 18 is rotatably sleeved on the outer ring of the middle of the adjusting ring 13. The top of the outer ring of the collar 18 is fixed. A set of adjusting rods 19 are fixedly connected, and a hydraulic cylinder 20 is movably installed between the two adjusting rods 19. Changes in the hydraulic pressure in the hydraulic cylinder 20 drive the adjusting rods 19 to extend and retract, thereby causing the collar 18 to move synchronously. This causes the adjusting ring 13 to move upwards along the axis of the pressure roller 4, thus adjusting the width limit between the working areas located between the pressure rollers 4, i.e., limiting the width of the pressed composite plate, and ensuring that it is rolled vertically to avoid tilting. A movable groove 102 is provided at the top of the inner side of the frame 1, and the end of the adjusting rod 19 is slidably sleeved into the movable groove 102. The movable groove 102 is fitted with the adjusting rod. The end of the lever 19 is designed to facilitate the movement and adjustment of the adjusting rod 19. The gear ring 14 is coaxial with the pressure roller 4, while the adjusting ring 13 is not coaxial with the pressure roller 4. The hydraulic change of the hydraulic cylinder 20 prevents the gear 17 from rotating. The entire adjustment process is divided into the adjustment of the distance between the pressure rollers 4 and the adjustment of the distance between the adjusting rings 13 on both sides of the pressure roller 4. These two adjustment processes are separate to ensure that they are not affected. This also avoids the situation of tooth rubbing caused by the meshing of the gear 17 and the gear ring 14. At the same time, the adjusting ring 13 can change the outer pressing length as the gear ring 14 rotates one revolution, thus realizing the adjustment of the distance between the pressure rollers 4.

[0037] A method for pressing copper-aluminum composite strips includes the following steps:

[0038] S1. Let the high-temperature aluminum liquid stand for a period of time, and then pour it into the casting nozzle. After cooling and crystallization, a semi-molten and semi-solid aluminum liquid is obtained.

[0039] S2. The copper strip is laser cleaned in a protective gas environment until there is no grease or oxide layer on the surface. Then it is placed on the conveyor roller 2 for conveying. At the same time, the second magnetic working ring 7 inside the conveyor roller 2 generates heat and transfers it to the copper strip, heating it to a certain temperature.

[0040] S3. In an oxygen-free environment, two copper strips are conveyed by conveyor roller 2, and semi-solid aluminum liquid is poured into the middle position to make full contact. Then, they are conveyed to pressure roller 4 for extrusion and rolling. The first magnetic working ring 5 inside pressure roller 4 absorbs heat to cool down the composite strip being rolled.

[0041] S4. The rotation of the gear ring 14 is adjusted by the second motor 16, thereby driving the adjustment ring 13 to rotate. The distance between the pressure rollers 4 is adjusted according to the pressure between two adjacent adjustment rings 13. At the same time, after the adjustment is completed, the hydraulic pressure of the hydraulic device 12 is used to ensure the stability of the position of the adjustment block 3.

[0042] S5. The hydraulic pressure of the hydraulic cylinder 20 drives the extension and retraction of the adjusting rod 19. The adjusting rod 19 drives the collar 18 and the adjusting ring 13 to move, thereby adjusting the distance between the adjusting rings 13 at both ends to adapt to the pressing and rolling of copper-aluminum composite plates of different widths.

Claims

1. A pressing device for copper-aluminum composite strips, characterized in that, The device includes two symmetrically arranged frames (1), two conveyor rollers (2) are symmetrically mounted on the top of the frames (1), a second magnetic field generator (8) is fixedly mounted on the central axis inside the conveyor rollers (2), a second magnetic working fluid ring (7) is fixedly mounted on the middle ring inside the conveyor rollers (2), a sliding groove (101) is symmetrically opened on the inner side of the middle part of the frame (1), an adjusting block (3) is slidably sleeved inside the sliding groove (101), a pressure roller (4) is rotatably mounted between the two symmetrically arranged adjusting blocks (3), and an adjusting ring (13) is rotatably sleeved at both ends of the pressure roller (4) with an eccentric structure. A first magnetic working ring (5) is fixedly installed at the central shaft inside the pressure roller (4). A first magnetic field generator (6) is fixedly installed at the middle ring position inside the pressure roller (4). A first motor (9) is fixedly installed on the outside of the adjusting block (3), and the output end of the first motor (9) is fixedly connected to the end of the pressure roller (4). A conductive ring (10) is rotatably sleeved on the outer ring of the end of the pressure roller (4). Hydraulic actuators (12) are fixedly installed at both ends of the outer side of the frame (1). A hydraulic rod (11) is fixedly connected to the side of the adjusting block (3), and the hydraulic rod (11) is movably sleeved inside the frame (1) and subjected to the hydraulic action of the hydraulic actuator (12). A conductive ring (10) is also provided at the end of the conveying roller (2). The first magnetic field generator (6) and the second magnetic field generator (8) are both connected to the power source through the conductive ring (10). The first magnetic working fluid ring (5) and the second magnetic working fluid ring (7) are connected by a heat exchange medium through the pressure roller (4) and the conveying roller (2).

2. The pressing device for copper-aluminum composite strips according to claim 1, characterized in that, The diameter of the conveying roller (2) is larger than the diameter of the pressure roller (4), and the outer surface of the conveying roller (2) contacts the polished copper strip. The first magnetic field generator (6) generates a gradually decreasing magnetic field, and the second magnetic field generator (8) generates a gradually increasing magnetic field.

3. The pressing device for copper-aluminum composite strips according to claim 2, characterized in that, A gear ring (14) is fixedly installed on the side of the adjusting ring (13) near the adjusting block (3). A limit ring (15) is fixedly installed on the side of the adjusting block (3) near the pressure roller (4), and the gear ring (14) is sleeved on the outer ring of the limit ring (15). A second motor (16) is fixedly installed inside the adjusting block (3) at a position on the side of the output shaft of the first motor (9). The output end of the second motor (16) extends out of the adjusting block (3) and is fixedly installed with a gear (17). The gear (17) meshes with the gear ring (14) for transmission.

4. The pressing device for copper-aluminum composite strips according to claim 3, characterized in that, The middle outer ring of the adjusting ring (13) is rotatably sleeved with a collar (18), and the top of the outer ring of the collar (18) is fixedly connected with an adjusting rod (19). A hydraulic cylinder (20) is movably installed between the two adjusting rods (19). A movable groove (102) is opened at the top of the inner side of the frame (1), and the end of the adjusting rod (19) is slidably sleeved into the movable groove (102).

5. The pressing device for copper-aluminum composite strips according to claim 4, characterized in that, The gear ring (14) is coaxial with the pressure roller (4), and the adjusting ring (13) is not coaxial with the pressure roller (4). The hydraulic change of the hydraulic cylinder (20) is such that the gear (17) does not rotate.

6. A pressing method for a copper-aluminum composite strip pressing device as described in claim 5, characterized in that, Includes the following steps: S1. Let the high-temperature aluminum liquid stand for a period of time, and then pour it into the casting nozzle. After cooling and crystallization, a semi-molten and semi-solid aluminum liquid is obtained. S2. The copper strip is laser cleaned in a protective gas environment until there is no grease or oxide layer on the surface. Then it is placed on the conveyor roller (2) for conveying. At the same time, the second magnetic working ring (7) inside the conveyor roller (2) generates heat and transfers it to the copper strip and heats it to a certain temperature. S3. In an oxygen-free environment, two copper strips are conveyed by the conveyor roller (2) and semi-solid aluminum liquid is poured into the middle position and made to fully contact. Then, they are conveyed to the pressure roller (4) for extrusion and rolling. The first magnetic working ring (5) inside the pressure roller (4) absorbs heat, thereby cooling the composite strip being rolled. S4. The rotation of the gear ring (14) is adjusted by the second motor (16), thereby driving the adjustment ring (13) to rotate. The distance between the pressure rollers (4) is adjusted according to the pressure between two adjacent adjustment rings (13). At the same time, after the adjustment is completed, the hydraulic pressure of the hydraulic device (12) is used to ensure the stability of the position of the adjustment block (3). S5. The hydraulic pressure of the hydraulic cylinder (20) drives the extension and retraction of the adjusting rod (19). The adjusting rod (19) drives the collar (18) and the adjusting ring (13) to move, thereby adjusting the distance between the adjusting rings (13) at both ends to adapt to the pressing and rolling of copper-aluminum composite plates of different widths.

Images