A process for preparing poles from copper-aluminum solid-liquid composite profiles

Abstract

The present invention discloses a process for preparing a pole from a copper-aluminum solid-liquid composite profile. The process comprises the following steps: first, heating an aluminum ingot to 700-750°C for smelting, adding a refining agent during the smelting process, and simultaneously blowing in argon gas for stirring to remove gas and slag; then, the degassed and deslagging aluminum solution is kept warm and allowed to stand for 30 minutes, and at the end of the standing period, aluminum-titanium-boron wire is added for grain refinement; simultaneously, the copper strip is texturized and cleaned, and then the aluminum solution after standing is cast onto the pretreated copper strip, and crystallized and composited on the forming rollers of the casting system; the composite profile is trimmed to obtain precise dimensions, then molded to form a boss, and finally, the pole is separated by stamping. The present invention solves the problems of low efficiency and high cost of existing copper-aluminum pole composite processes.

Description

Technical Field

[0001] The present invention relates to the technical field of pole manufacturing, and in particular to a process for preparing poles using copper-aluminum solid-liquid composite profiles. Background Art

[0002] In modern industrial production, copper-aluminum composite materials are widely used in fields such as electricity, electronics and automobile manufacturing due to their excellent electrical conductivity, thermal conductivity and lightweight properties.

[0003] In the existing field of copper-aluminum composite technology, traditional smelting and composite processes face a series of challenges and problems. First, physical stacking or mechanical bonding methods often result in insufficient interfacial bonding strength, which limits the composite material's performance under load. Second, existing composite processes are inefficient and costly, which is particularly pronounced in large-scale production. Furthermore, molten aluminum is susceptible to oxidation during the smelting process. The resulting oxide film not only affects the purity of the material but can also serve as a carrier for hydrogen and other impurities, leading to reduced material performance. Furthermore, inadequate refining of the molten aluminum can also lead to internal porosity and looseness, compromising the material's density and mechanical strength. Summary of the Invention

[0004] In view of the problems of low efficiency and high cost in the above-mentioned existing copper-aluminum composite process, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide a process for preparing poles from copper-aluminum solid-liquid composite profiles, the purpose of which is to improve the manufacturing efficiency of copper-aluminum poles.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a process for preparing a pole from a copper-aluminum solid-liquid composite profile, comprising the following steps:

[0007] First, the aluminum ingot is heated to 700-750℃ for smelting. Refining agents are added during the smelting process, and argon gas is blown in for stirring to remove gas and slag.

[0008] Determine the melting state of the aluminum ingot within 0 to 20 minutes. If the aluminum ingot is completely melted, maintain the internal temperature of the melting barrel at 730 to 760°C and continue heating for 5 to 7 minutes. At the same time, maintain the argon injection speed and the stirring speed of the stirring device unchanged.

[0009] If the aluminum ingot is not completely melted, the internal temperature of the smelting barrel is maintained at 730-760℃ and the heating is continued. At the same time, the argon blowing rate is increased and the stirring device is turned on once per minute for intermittent stirring until the aluminum ingot is completely melted.

[0010] Then, the aluminum solution after degassing and slag removal is kept warm and allowed to stand for 30 to 40 minutes, and then aluminum titanium boron wire is added at the end of the standing period to refine the grains;

[0011] At the same time, the copper strip is textured and cleaned, and then the aluminum solution after standing is poured onto the pre-treated copper strip and crystallized and compounded at the forming roller of the casting system;

[0012] Before casting the aluminum solution, the copper strip is heated to 700-730°C, and then the aluminum solution is cast back and forth along the length of the copper strip.

[0013] The composite profile is trimmed to obtain precise dimensions, then molded to form the bosses, and finally the poles are separated by punching.

[0014] As a preferred embodiment of the method for preparing poles from copper-aluminum solid-liquid composite profiles of the present invention, there is provided at least one group of argon blowing devices, which are equidistantly arranged on the top of the aluminum ingot melting barrel, and the blowing range covers the opening of the aluminum ingot melting barrel.

[0015] As a preferred embodiment of the method for preparing a pole from a copper-aluminum solid-liquid composite profile of the present invention, the melting temperature inside the smelting barrel includes a preliminary melting stage and an accelerated melting stage, the temperature range of the preliminary melting stage is 700°C to 725°C, and the temperature range of the accelerated melting stage is 725°C to 750°C;

[0016] Determine whether the aluminum ingot is completely melted in the smelting barrel at the initial smelting temperature within 20 minutes;

[0017] If so, continue heating for 5 minutes, maintain the smelting barrel temperature at the lowest temperature of the initial smelting gear, and then let it stand;

[0018] If not, adjust the temperature of the smelting barrel to the accelerated smelting gear until the aluminum ingot is completely melted. After the aluminum ingot is completely melted, continue heating for 5 minutes, reduce the internal temperature of the smelting barrel to the lowest temperature of the initial smelting gear, and then let it stand.

[0019] As a preferred embodiment of the method for preparing a pole from a copper-aluminum solid-liquid composite profile of the present invention, the amount of aluminum titanium boron wire added during the final standing period, which is a period of 20 to 30 minutes during which the aluminum solution is allowed to stand, should satisfy the following formula:

[0020] M=V×ρ

[0021] Wherein, M represents the amount of AlTiB wire added, V represents the volume of the aluminum ingot, and ρ represents the density of the AlTiB wire. The volume of the aluminum ingot and the density of the AlTiB wire are known.

[0022] Aluminum titanium boron wire is evenly dispersed and added to the aluminum solution, and then melted into the aluminum solution with a stirring device. During the stirring process, the suspended impurities on the upper layer of the aluminum solution are simultaneously cleaned.

[0023] As a preferred embodiment of the method for preparing a pole from a copper-aluminum solid-liquid composite profile of the present invention, the aluminum solution is continuously cast on a copper bar through a casting system, wherein the copper bar is at room temperature, and crystallization and composite are performed at the forming roller, the continuous casting speed is 200 mm to 10,000 mm per minute, the composite width is 10 mm to 100 mm, and the composite thickness is 2 mm to 12 mm;

[0024] The rolling pressure of the forming roller is 5000N~5000000N, the rolling speed is 200mm / min~10000mm / min, the rolling temperature is 0℃~500℃, and the rolling tension is 0N~200000N.

[0025] As a preferred embodiment of the method for preparing a pole from a copper-aluminum solid-liquid composite profile of the present invention, the forming roller is cooled by water or liquid nitrogen;

[0026] The pole aluminum boss is preformed by forming rollers, and aluminum waste is discharged sideways; the stripping force reaches 80N / mm~140N / mm.

[0027] As a preferred embodiment of the method for preparing a pole from a copper-aluminum solid-liquid composite profile of the present invention, the copper strip is fixedly placed in a casting mold, and a bottom groove and a top groove are provided in the casting mold, wherein the top groove is located on top of the bottom groove and is connected to the bottom groove;

[0028] The copper strip is placed in the bottom trough, the aluminum solution is poured into the top trough, the aluminum solution is cooled by the forming roller, and the cooled aluminum ingot and the copper strip roller are composited into a sample.

[0029] As a preferred embodiment of the method for preparing a pole from a copper-aluminum solid-liquid composite profile of the present invention, the cross-sectional width of the top groove is greater than the cross-sectional width of the bottom groove, and after the composite template is completed, the excess aluminum edge is removed by mechanical cutting to form a rectangular strip composite template;

[0030] The excess aluminum edges that are cut off are cleaned and dried and then returned to the furnace for melting.

[0031] As a preferred embodiment of the method for preparing a pole from a copper-aluminum solid-liquid composite profile of the present invention, pole boss grooves are equidistantly opened at the bottom of the casting mold, and the composite template is pressed down by the stamping mold head to form a pole boss groove.

[0032] As a preferred solution of the method for preparing a pole from a copper-aluminum solid-liquid composite profile of the present invention, the top of the casting mold is provided with cutting grooves at equal intervals, and the pole boss grooves are located in the middle of adjacent cutting grooves.

[0033] Beneficial effects of the present invention:

[0034] The present invention optimizes the preparation process of copper-aluminum composite materials and achieves a significant improvement in the interfacial bonding strength of the materials. By precisely controlling the melting parameters and compounding conditions, the process flow is streamlined, production efficiency is improved, and unit costs are reduced. In addition, by reducing the oxidation opportunities of molten aluminum at high temperatures, this solution effectively improves the purity of the material and the uniformity of the microstructure, thereby enhancing the overall performance of the material. This innovative method also broadens the application range of copper-aluminum composite materials, enabling them to meet a wider range of industrial needs. At the same time, the environmental impact of the production process is reduced, reflecting a commitment to sustainable development. Overall, this solution has enhanced the market competitiveness and industrial application value of copper-aluminum composite materials through technological innovation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0036] Figure 1 The present invention is a process flow chart of a method for preparing a pole from a copper-aluminum solid-liquid composite profile.

[0037] Figure 2 This is a logic diagram of aluminum ingot melting in the method for preparing poles from copper-aluminum solid-liquid composite profiles of the present invention.

[0038] Figure 3 This is a diagram showing the proportion of aluminum solution in the initial smelting stage of the method for preparing a pole from a copper-aluminum solid-liquid composite profile of the present invention.

[0039] Figure 4 This is a diagram showing the proportion of aluminum solution in the accelerated smelting stage of the method for preparing a pole from a copper-aluminum solid-liquid composite profile of the present invention.

[0040] Figure 5 This is a schematic diagram of the casting mold structure of the method for preparing a pole from a copper-aluminum solid-liquid composite profile of the present invention.

[0041] Figure 6 This is an overlay diagram of aluminum solution casting for the method of preparing a pole from a copper-aluminum solid-liquid composite profile of the present invention.

[0042] Figure 7 This is a schematic diagram of the pole stamping forming method of the present invention for preparing poles from copper-aluminum solid-liquid composite profiles. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0044] Example 1

[0045] Reference Figures 1 to 4 , which is the first embodiment of the present invention, provides a process for preparing a pole from a copper-aluminum solid-liquid composite profile, which includes the following steps:

[0046] S1: First, the aluminum ingot is heated to 700-750°C for smelting. Refining agent is added during the smelting process, and argon gas is blown in for stirring to remove gas and slag.

[0047] Determine the melting state of the aluminum ingot within 0 to 20 minutes. If the aluminum ingot is completely melted, maintain the internal temperature of the melting barrel at 730 to 760°C and continue heating for 5 to 7 minutes. At the same time, maintain the argon blowing speed and the stirring speed of the stirring device unchanged.

[0048] The quantitative and constant speed blowing of argon can maintain the stability of the internal environment of the smelting barrel, and the uniform stirring can ensure that the oxides in the aluminum solution continue to float to the top.

[0049] If the aluminum ingot is not completely melted, the internal temperature of the smelting barrel is maintained at 730-760°C and continued heating is carried out. At the same time, the argon blowing rate is increased, and the stirring device is turned on once per minute for intermittent stirring until the aluminum ingot is completely melted.

[0050] Because the aluminum ingot is completely melted, impurities will continue to precipitate during the subsequent melting process. Sufficient argon is required to accelerate the melting of the aluminum ingot, and intermittent stirring can remove the precipitated impurities uniformly.

[0051] Furthermore, there are at least one group of argon blowing devices, which are equidistantly arranged on the top of the aluminum ingot melting barrel, and the blowing range covers the opening of the aluminum ingot melting barrel.

[0052] In order to verify the effects of the number of argon injection devices and the injection angle on the degassing and slag removal of aluminum solution, the following control experiments were conducted:

[0053] Three groups of melting furnaces are prepared, each group of furnaces will use a different arrangement of the argon blowing device.

[0054] Control group setting:

[0055] Group A: Use a single set of argon blowing device, located in the center of the top of the smelting ladle.

[0056] Experimental group settings:

[0057] Group B: Two sets of argon blowing devices are used, which are equidistantly set on both sides of the top of the smelting ladle.

[0058] Group C: Four sets of argon blowing devices are used, which are equidistantly arranged on the top of the smelting barrel to form a cross-shaped layout.

[0059] For all groups, the same argon flow rate and pressure were set according to the pre-experimental design.

[0060] All melting furnaces were preheated to 700°C.

[0061] Aluminum ingots of the same mass were loaded into each group of melting furnaces and heated to 725°C.

[0062] Add an appropriate amount of refining agent to the aluminum liquid and turn on the argon blowing device for stirring to promote degassing and slag removal.

[0063] The argon flow rate, pressure, melting temperature, stirring speed and time of each group were recorded.

[0064] During the degassing and deslagging process, aluminum liquid is sampled regularly from each group of smelting furnaces to analyze gas content and impurities.

[0065] The quality of the aluminum liquid in each group was compared, including gas content, oxidation degree and impurity level.

[0066] The experiment was repeated at least three times to ensure the accuracy and reliability of the data.

[0067] In order to evaluate the effects of different temperature levels on the melting rate of aluminum ingots and the quality of aluminum solution, the following experimental steps were performed:

[0068] Prepare three melting furnaces, marked as groups A, B, and C respectively.

[0069] Group A used a control melting barrel and kept the temperature at 725°C without changing it.

[0070] Group B used a preliminary smelting temperature range of 700°C to 725°C.

[0071] The temperature range of the accelerated melting stage used in Group C is 725℃~750℃.

[0072] Aluminum ingots of the same mass are loaded into each melting furnace.

[0073] The temperature of group A was set to 725°C, the temperature of group B was linearly increased from 700°C to 725°C within 20 minutes, and the temperature of group C was linearly increased from 725°C to 750°C within 20 minutes.

[0074] After 20 minutes, the melting state of the aluminum ingots in each melting furnace was evaluated.

[0075] If the aluminum ingots of Group B and Group C are not completely melted, continue heating until they are completely melted.

[0076] After the aluminum ingots were completely melted, the temperature of all groups was lowered to the lowest temperature of the initial melting stage and allowed to stand for 30 minutes.

[0077] After the rest period, samples of molten aluminum were taken from each furnace.

[0078] The gas content was measured using a gas analyzer.

[0079] Evaluate the degree of oxidation and impurity levels.

[0080] The temperature evolution, melting time, gas content, oxidation degree and impurity level of each furnace were recorded.

[0081] Table 1: Effects of different temperature levels on the melting speed of aluminum ingots and the quality of aluminum solution

[0082]

[0083] Data from three experiments revealed the effects of different temperature settings on the melting rate of aluminum ingots and the quality of the molten aluminum. Group C exhibited a faster melting rate and lower gas content, oxidation, and impurity levels in the accelerated melting setting, demonstrating that increasing the temperature within an appropriate range can enhance melting efficiency and improve the quality of the molten aluminum. These findings can help optimize the melting process, improving production efficiency and product quality.

[0084] The experimental data were analyzed to determine which argon injection device arrangement provided the best degassing and slag removal effect. The following experiments were also conducted:

[0085] According to the above steps, conduct the following experiments:

[0086] Experimental conditions:

[0087] Standard argon flow rate: 5L / min

[0088] Standard argon pressure: 100kPa

[0089] Standard aluminum liquid temperature: 725℃

[0090] Refining agent addition amount: fixed amount

[0091] Stirring speed: fixed speed

[0092] Table 2: Effect of the number and position of argon injection devices on degassing and slag removal effects

[0093]

[0094]

[0095]

[0096] in conclusion:

[0097] The experimental data above show that the layout of the argon injection device has a significant impact on the degassing and deslagging of the aluminum liquid. Under the same experimental conditions, Group C performed best in reducing gas content, oxidation degree, and impurity levels, indicating that this layout may provide better stirring effect and more effective degassing and deslagging.

[0098] Furthermore, the melting temperature inside the smelting barrel includes a preliminary smelting stage and an accelerated smelting stage. The temperature range of the preliminary smelting stage is 700°C to 725°C, and the temperature range of the accelerated smelting stage is 725°C to 750°C.

[0099] Determine whether the aluminum ingot is completely melted in the smelting barrel at the initial smelting temperature within 20 minutes.

[0100] If so, the temperature of the smelting barrel is maintained at the lowest temperature of the initial smelting gear, and then allowed to stand.

[0101] If not, adjust the temperature of the smelting barrel to the accelerated smelting gear until the aluminum ingot is completely melted. After the melting is complete, reduce the internal temperature of the smelting barrel to the lowest temperature of the initial smelting gear, and then let it stand.

[0102] In order to study the effect of melting temperature on the melting rate of aluminum ingots and the quality of aluminum solution, the following experiments were also conducted:

[0103] Prepare three melting furnaces, marked as groups A, B, and C respectively.

[0104] Control group setting:

[0105] Group A used a control melting barrel and kept the temperature at 725°C (the middle value of the initial melting file) without changing it.

[0106] Experimental group settings:

[0107] Group B used the temperature range of the initial smelting stage (700°C to 725°C).

[0108] Group C used an accelerated melting temperature range (725°C to 750°C).

[0109] Aluminum ingots of the same mass are loaded into each melting furnace.

[0110] The temperature of group A was set to 725°C, the temperature of group B was linearly increased from 700°C to 725°C within 20 minutes, and the temperature of group C was linearly increased from 725°C to 750°C within 20 minutes.

[0111] After 20 minutes, the melting state of the aluminum ingots in each melting furnace was evaluated.

[0112] If the aluminum ingots of Groups B and C are not completely melted, continue heating until they are completely melted, and record the total time required for complete melting.

[0113] After the aluminum ingots were completely melted, the temperature of all groups was lowered to the lowest temperature of the initial melting stage (700°C) and allowed to stand for 30 minutes.

[0114] After the rest period, samples of molten aluminum were taken from each furnace.

[0115] The gas content was measured using a gas analyzer.

[0116] Evaluate the degree of oxidation and impurity levels.

[0117] The temperature evolution, melting time, gas content, oxidation degree and impurity level of each furnace were recorded.

[0118] Each experimental group was repeated five times to ensure the accuracy and reliability of the data.

[0119] Analyze the effects of different temperature levels on the melting rate of aluminum ingots and the quality of aluminum solution.

[0120] According to the above steps, conduct the following experiments:

[0121] Experimental conditions:

[0122] Control group (Group A): constant temperature 725℃.

[0123] Experimental group (Group B): Initial smelting stage, the temperature increased linearly from 700℃ to 725℃.

[0124] Experimental group (Group C): accelerated melting gear, the temperature increased linearly from 725℃ to 750℃.

[0125] Melting time: 20 minutes for preliminary evaluation, continue heating if necessary until completely melted.

[0126] Standing time: 30 minutes.

[0127] Table 3: Effect of melting temperature on the melting rate of aluminum ingots and the quality of aluminum solution

[0128]

[0129]

[0130] in conclusion:

[0131] The above experimental data show that group A melts faster at a constant temperature, but group C also exhibits a faster melting rate under the accelerated melting gear, and the gas content, oxidation degree and impurity level of the aluminum solution are lower, indicating that the accelerated melting gear may help improve the quality of the aluminum solution.

[0132] The melting speed of group B is slower, and the quality of aluminum solution is not as good as that of group A and group C. Therefore, by controlling the melting temperature and time, the melting speed of aluminum ingots and product quality can be effectively controlled.

[0133] S2: Then, the aluminum solution after degassing and deslagging is kept warm and allowed to stand for 30 to 40 minutes, and then aluminum titanium boron wire is added at the end of the standing period to refine the grains.

[0134] This embodiment is preferably left to stand for 30 minutes.

[0135] The final standing period is the period of 20 to 30 minutes during which the aluminum solution is allowed to stand. The amount of aluminum titanium boron wire added should satisfy the following formula:

[0136] M=V×ρ

[0137] Wherein, M represents the amount of aluminum titanium boron wire added, V represents the volume of the aluminum ingot, and ρ represents the density of the aluminum titanium boron wire; the volume of the aluminum ingot and the density of the aluminum titanium boron wire are known.

[0138] As a grain refiner, the amount of aluminum titanium boron wire added needs to be precisely controlled to ensure that sufficient crystal nuclei are formed in the aluminum solution to promote grain refinement.

[0139] By precisely controlling the addition amount of AlTiB wire, the microstructure of the aluminum alloy can be optimized, thereby improving its mechanical properties such as strength, hardness and toughness.

[0140] Aluminum titanium boron wire is evenly dispersed and added to the aluminum solution, and then melted into the aluminum solution with a stirring device. During the stirring process, the suspended impurities on the upper layer of the aluminum solution are simultaneously cleaned.

[0141] S3: At the same time, the copper strip is textured and cleaned, and then the aluminum solution after standing is cast onto the pre-treated copper strip and crystallized and compounded at the forming roller of the casting system.

[0142] The aluminum solution is continuously cast on the copper strip through a casting system. Before the aluminum solution is cast, the copper strip is heated to 700°C as a whole. Then the aluminum solution is cast back and forth along the length of the copper strip. This temperature can ensure that the copper strip has good plasticity when casting the aluminum solution, and it is also conducive to the bonding of the aluminum solution and the copper strip.

[0143] The crystallization and compounding are carried out at the forming roller, the continuous casting speed is 200mm to 10000mm per minute, the compounding width is 10mm to 100mm, and the compounding thickness is 2mm to 12mm.

[0144] The continuous casting speed determines the solidification rate of the molten aluminum on the copper strip, affecting the material's microstructure and macroscopic properties. Slower casting speeds facilitate adequate contact and bonding between the molten aluminum and the copper strip, while faster speeds may improve production efficiency but require precise control to avoid defects.

[0145] Furthermore, the composite width is related to the design and application requirements of the pole. A wider composite width can provide a larger contact area, which is beneficial for improving electrical and thermal conductivity, but may also increase material consumption.

[0146] Furthermore, the composite thickness directly affects the mechanical strength and electrical conductivity of the pole. A thicker composite layer can improve structural stability, but may increase material cost and processing difficulty.

[0147] The rolling pressure of the forming roller is 5000N~5000000N, the rolling speed is 200mm / min~10000mm / min, the rolling temperature is 0℃~500℃, and the rolling tension is 0N~200000N.

[0148] Among them, rolling pressure is a key factor in achieving copper-aluminum cladding, which affects the bonding strength and interface quality of the materials. Appropriate pressure can promote the metallurgical bonding of the two materials, but excessive pressure may cause material deformation or other defects.

[0149] Furthermore, the rolling speed matches the continuous casting speed, affecting the cooling rate and microstructure of the material. An appropriate rolling speed helps to obtain a uniform microstructure and improve material properties.

[0150] Furthermore, rolling temperature has a significant impact on the plastic deformation and bonding quality of the material. Higher rolling temperature helps to improve the plasticity of the material and reduce the rolling force, but it may also affect the final performance of the material.

[0151] Furthermore, rolling tension can control the deformation behavior of the material during the rolling process, which helps to improve the composite accuracy and reduce the elastic recovery of the material.

[0152] The forming roller is cooled by water or liquid nitrogen.

[0153] This embodiment preferably uses liquid nitrogen for cooling. Liquid nitrogen's cryogenic properties enable extremely low-temperature cooling of the forming roller, helping to improve the material's grain refinement and interfacial bonding strength. Furthermore, liquid nitrogen's high heat capacity and thermal conductivity enable it to quickly transfer heat to the cooled object, improving cooling efficiency.

[0154] The pole aluminum boss is preformed by forming rollers, and aluminum waste is discharged sideways; the stripping force reaches 80N / mm~140N / mm.

[0155] Among them, peel force is an important indicator to measure the bonding strength of the copper-aluminum composite interface. A higher peel force indicates good interface bonding, which helps improve the overall performance of the terminal.

[0156] S4: The composite profile is trimmed to obtain precise dimensions, then molded to form the boss, and finally the pole is separated by stamping.

[0157] Example 2

[0158] Reference Figures 1 to 7 , which is the second embodiment of the present invention. This embodiment differs from the first embodiment in that: the copper strip is fixedly placed in a casting mold 100. The casting mold 100 is provided with a bottom groove 101 and a top groove 102. The top groove 102 is located on top of the bottom groove 101 and is connected to the bottom groove 101.

[0159] The casting mold 100 is a long rectangular structure, and the forming roller is set on the top of the casting mold 100 and aligned with the center line of the top groove 102 to facilitate die casting.

[0160] The copper strip is placed in the bottom trough 101, and the aluminum solution is poured into the top trough 102. The aluminum solution is cooled by the forming roller, and the cooled aluminum ingot and the copper strip roller are combined into a sample.

[0161] Reference Figure 6 During the casting process of the aluminum solution, the top groove 102 is gradually filled and initially attached to the top of the copper strip. Then, the aluminum solution is continuously cast through the forming roller. After cooling, the aluminum solution gradually solidifies to form an aluminum layer L. With the die-casting of the forming roller, the aluminum layer L and the copper layer T are gradually composited into one.

[0162] The cross-sectional width of the top groove 102 is greater than that of the bottom groove 101. After the sample is composited, the excess aluminum edge is removed by mechanical cutting to form a rectangular strip composite sample;

[0163] Reference Figure 7 The excess aluminum edges that are cut off are cleaned and dried and then returned to the furnace for melting.

[0164] The bottom of the casting mold 100 has a groove 101 with pole boss grooves 103 equidistantly formed at the bottom. The composite template is pressed down by the stamping mold head to form the pole boss grooves 103 .

[0165] Cutting grooves 104 are equidistantly provided at the top of the casting mold 100 , and the pole boss grooves 103 are located in the middle of adjacent cutting grooves 104 .

[0166] The stamping die head is pressed downward to extrude the composite copper-aluminum plate, and the plate is formed into a pole in the pole boss groove 103 .

[0167] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A process for preparing a pole from a copper-aluminum solid-liquid composite profile, characterized in that: The following steps are included: First, the aluminum ingot is heated to 700-750°C for smelting. Refining agents are added during the smelting process, and argon gas is blown in for stirring to remove gas and slag. Four sets of argon gas blowing devices are used, equidistantly arranged on the top of the smelting barrel to form a cross-shaped layout. Determine the melting state of the aluminum ingot within 0 to 20 minutes. If the aluminum ingot is completely melted, maintain the internal temperature of the melting barrel at 730 to 760°C and continue heating for 5 to 7 minutes, while maintaining the argon blowing rate and the stirring speed of the stirring device unchanged. If the aluminum ingot is not completely melted, maintain the internal temperature of the melting barrel at 730 to 760°C and continue heating, while increasing the argon blowing rate and turning on the stirring device once per minute for intermittent stirring until the aluminum ingot is completely melted. Then, the aluminum solution after degassing and slag removal is kept warm and allowed to stand for 30 to 40 minutes, and then aluminum titanium boron wire is added at the end of the standing period to refine the grains; At the same time, the copper strip is texturized and cleaned, and then the aluminum solution after standing is poured onto the pre-treated copper strip and crystallized and composited at the forming roller of the casting system. Before the aluminum solution is cast, the copper strip is heated to 700-730°C as a whole, and then the aluminum solution is cast back and forth along the length of the copper strip. The continuous casting speed is 200mm-10000mm per minute, the composite width is 10mm-100mm, and the composite thickness is 2mm-12mm. The composite profile is trimmed to obtain precise dimensions, then molded to form the bosses, and finally the poles are separated by stamping; The rolling pressure of the forming roller is 5000N~5000000N, the rolling speed is 200mm / min~10000mm / min, the rolling temperature is 0℃~500℃, and the rolling tension is 0N~200000N. The forming roller is cooled by water or liquid nitrogen; The pole aluminum boss is pre-formed by forming rollers, and aluminum waste is discharged sideways; the peeling force reaches 80N / mm~140N / mm.

2. The process for preparing a pole from a copper-aluminum solid-liquid composite profile according to claim 1, characterized in that: There is at least one group of argon blowing devices, which are equidistantly arranged on the top of the aluminum ingot melting barrel, and the blowing range covers the opening of the aluminum ingot melting barrel.

3. The process for preparing a pole from a copper-aluminum solid-liquid composite profile according to claim 1, characterized in that: The melting temperature inside the smelting barrel includes the initial melting stage and the accelerated melting stage. The temperature range of the initial melting stage is 700℃~725℃, and the temperature range of the accelerated melting stage is 725℃~750℃; Determine whether the aluminum ingot is completely melted in the smelting barrel at the initial smelting temperature within 20 minutes; If so, continue heating for 5 minutes, maintain the smelting barrel temperature at the lowest temperature of the initial smelting gear, and then let it stand; If not, adjust the temperature of the smelting barrel to the accelerated smelting gear until the aluminum ingot is completely melted. After the aluminum ingot is completely melted, continue heating for 5 minutes, reduce the internal temperature of the smelting barrel to the lowest temperature of the initial smelting gear, and then let it stand.

4. The process for preparing a pole from a copper-aluminum solid-liquid composite profile according to any one of claims 1 to 3, characterized in that: The copper strip is fixedly placed in a casting mold (100), and a bottom groove (101) and a top groove (102) are provided in the casting mold (100), wherein the top groove (102) is located on the top of the bottom groove (101) and is in communication with the bottom groove (101); The copper strip is placed in the bottom trough (101), the aluminum solution is poured into the top trough (102), the aluminum solution is cooled by forming rollers, and the cooled aluminum ingot and the copper strip roller are combined into a sample plate.

5. The process for preparing a pole from a copper-aluminum solid-liquid composite profile according to claim 4, characterized in that: The cross-sectional width of the top groove (102) is greater than the cross-sectional width of the bottom groove (101). After the composite template is completed, the redundant aluminum edges are removed by mechanical cutting to form a rectangular strip composite template; The excess aluminum edges that are cut off are cleaned and dried and then returned to the furnace for melting.

6. The process for preparing a pole from a copper-aluminum solid-liquid composite profile according to claim 5, characterized in that: The bottom groove (101) of the casting mold (100) is provided with pole boss grooves (103) at equal intervals, and the composite template is pressed down by the stamping mold head to form the pole boss groove (103).

7. The process for preparing a pole from a copper-aluminum solid-liquid composite profile according to claim 6, characterized in that: Cutting grooves (104) are equidistantly provided on the top of the casting mold (100), and the pole boss grooves (103) are located in the middle of adjacent cutting grooves (104).

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