A method for controlling rolling of copper rod for ultra-high voltage

Abstract

The present invention relates to the technical field of copper rod processing, and in particular to a method for controlling the rolling of an ultra-high-pressure copper rod, comprising the following steps: rolling the copper rod in a plurality of passes using a three-dimensional collaborative rolling mode, with the rolling direction of each pass forming a specified angle with the rolling direction of the previous pass; configuring a rolling roller with an adaptive surface correction module to compensate for a shape error of the copper rod caused by switching the rolling direction; by adopting the three-dimensional collaborative rolling mode, the uniformity of the internal grain structure of the copper rod is effectively improved, and the mechanical properties and electrical conductivity of the material are enhanced; the adaptive surface correction module configured with the rolling roller can dynamically compensate for the shape error caused by switching the rolling direction, and significantly improve the shape accuracy and surface quality of the copper rod; and by real-time detecting the deformation after each rolling pass and dynamically adjusting the rolling gap, the problem of uneven deformation is avoided, thereby ensuring the consistency of the product.

Description

Technical Field

[0001] The invention relates to the technical field of copper rod processing, in particular to a rolling control method for an ultra-high pressure copper rod. Background Art

[0002] With the development of modern industry, the requirements for material performance are becoming increasingly higher. Especially in the field of power transmission, the performance of ultra-high voltage cables directly affects the safety, stability and efficiency of power transmission. The quality of copper rods, the conductor material and one of the core components of cables, is particularly important. Traditional copper rod production methods face many challenges in meeting the needs of ultra-high voltage applications, mainly in terms of material consistency, shape accuracy and surface quality.

[0003] Traditional rolling processes usually use fixed directions or limited directional changes for processing. This method makes it difficult to effectively control the accuracy of the internal grain structure and external shape of the copper rod, thereby limiting the performance of the final product. In addition, during the multi-pass rolling process, since the rolling direction of each pass is not optimized, it is easy to cause uneven deformation of the copper rod, affecting its mechanical properties and conductive properties. Moreover, the traditional rolling process lacks an effective real-time feedback and adjustment mechanism, and cannot dynamically adjust the rolling parameters according to changes in the actual rolling process, further affecting product quality. Summary of the Invention

[0004] The present invention provides a method for controlling the rolling of an ultrahigh-voltage copper rod, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The present application provides a method for controlling the rolling of an ultra-high voltage copper rod, which is characterized by comprising the following steps:

[0007] The copper rod is rolled in several passes using a three-dimensional collaborative rolling mode, with the rolling direction of each pass forming a specified angle with the rolling direction of the previous pass;

[0008] The roller is equipped with an adaptive surface correction module to compensate for the copper rod shape error caused by rolling direction switching;

[0009] Detect the deformation of the copper rod after each rolling pass. When the deformation exceeds the threshold, correct the gap between the subsequent rolling passes.

[0010] A copper rod speed feedback module is established to detect the linear speed of the rolled copper rod and adjust the linear speed of the roller during the next rolling pass to match the linear speed of the copper rod.

[0011] Based on the above embodiment, the method further includes temperature control, wherein the temperature of the copper rod after each rolling pass is detected, and when the detected temperature is higher than a threshold, the copper rod is cooled, and when the detected temperature is lower than the threshold, the copper rod is heated.

[0012] Based on the above embodiment, the cooling process includes primary cooling and secondary cooling. The primary cooling is water mist cooling, and the secondary cooling is liquid nitrogen mist cooling. When the detected temperature is higher than the threshold and the temperature difference is within 0-10°C, the primary cooling is started. When the temperature difference is above 10°C, the secondary cooling is started.

[0013] Based on the above embodiment, the heating process is electromagnetic induction heating.

[0014] Based on the above embodiment, the method further includes performing defect detection on the copper rod after each rolling pass, and when the defect signal intensity exceeds a threshold, correcting the rolling force during the subsequent rolling passes.

[0015] Based on the above embodiment, the plurality of rolling passes are divided into three groups of rolling processes, and the three groups of rolling processes are rough rolling, finish rolling and shaping in sequence.

[0016] Based on the above embodiment, the correction method of the adaptive surface correction module includes at least one of changing the roller surface, changing the roller pressure distribution, or changing the roller axis direction.

[0017] Based on the above embodiment, the deformation detection uses a laser three-dimensional scanner to collect the circumferential profile data of the copper rod.

[0018] Based on the above embodiment, the number of passes for copper rod rolling is 10 to 12, and along the conveying direction of the copper rod, the pressure of the roller gradually decreases and the rolling speed of the roller gradually increases.

[0019] Based on the above embodiment, the copper rod is rolled by the rollers by pulse rolling.

[0020] The technical solution of the present invention can achieve the following technical effects:

[0021] By adopting a three-dimensional collaborative rolling mode, the uniformity of the internal grain structure of the copper rod is effectively improved, and the mechanical properties and electrical conductivity of the material are enhanced; the adaptive surface correction module of the roller configuration can dynamically compensate for the shape error caused by switching the rolling direction, significantly improving the shape accuracy and surface quality of the copper rod; by real-time detection of the deformation after each rolling pass and dynamic adjustment of the rolling gap, the problem of uneven deformation is avoided and the consistency of the product is ensured; in addition, the introduction of the copper rod speed feedback module realizes the precise matching of the roller linear speed and the copper rod linear speed, further optimizing the stability and efficiency of the rolling process. The overall solution significantly improves the performance of copper rods in ultra-high voltage applications through multi-dimensional collaborative control and real-time feedback mechanism, and solves the problems of poor material consistency, low shape accuracy and insufficient surface quality in traditional processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0023] Throughout the description of this application, those skilled in the art will appreciate that this application can be implemented as methods, apparatuses, electronic devices, and computer-readable storage media. Therefore, this application can be implemented in the following forms: entirely in hardware, entirely in software (including firmware, resident software, microcode, etc.), or a combination of hardware and software. Furthermore, in some embodiments, this application can also be implemented as a computer program product embodied in one or more computer-readable storage media, wherein the computer-readable storage media contains computer program code.

[0024] The computer-readable storage medium may be any combination of one or more computer-readable storage media. Computer-readable storage media include: electrical, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or components, or any combination thereof. More specific examples of computer-readable storage media include: portable computer disks, hard disks, random access memories, read-only memories, erasable programmable read-only memories, flash memory, optical fibers, optical disc read-only memories, optical storage devices, magnetic storage devices, or any combination thereof. In this application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device, or component.

[0025] The acquisition, storage, use, and processing of data in this application's technical solution comply with relevant national laws.

[0026] This application describes the provided methods, devices, and electronic devices through flowcharts and / or block diagrams.

[0027] It should be understood that each block in the flowchart and / or block diagram, as well as combinations of blocks in the flowchart and / or block diagram, can be implemented by computer-readable program instructions. These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine. These computer-readable program instructions are executed by the computer or other programmable data processing device to produce a device that implements the functions / operations specified in the blocks in the flowchart and / or block diagram.

[0028] These computer-readable program instructions may also be stored in a computer-readable storage medium that enables a computer or other programmable data processing device to operate in a specific manner. In this way, the instructions stored in the computer-readable storage medium produce an instruction device product that implements the functions / operations specified in the blocks in the flowchart and / or block diagram.

[0029] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device, so that a series of operational steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby enabling the instructions executed on the computer or other programmable data processing apparatus to provide a process that implements the functions / operations specified by the blocks in the flowchart and / or block diagram.

[0030] The present application is described in detail below in conjunction with the accompanying drawings in the present application.

[0031] Example 1

[0032] like Figure 1 As shown, a method for controlling the rolling of an ultra-high pressure copper rod according to the present invention is characterized in that it comprises the following steps:

[0033] S1. The copper rod is rolled in a plurality of passes using a three-dimensional coordinated rolling mode, with the rolling direction of each pass forming a specified angle with the rolling direction of the previous pass;

[0034] In the present invention, the three-dimensional collaborative rolling mode is to construct a three-dimensional strain field through the spatial alternation of the rolling direction in multiple rolling passes, and optimize the stress distribution and geometric accuracy of the copper rod. Specifically, the three-dimensional collaborative rolling realizes the uniformity of the stress state by applying pressure alternately in the X, Y, and Z directions. Taking four passes as an example, in the first pass, the rolling direction is the Y axis, the roller axis is the Z axis, and horizontal width rolling is performed. In the second pass, the rolling direction is the XY plane diagonal, the roller axis is 45°, and shear deformation rolling is performed. In the third pass, the rolling direction is the Z axis, the roller axis is the Y axis, and vertical rolling is performed. In the fourth pass, the rolling direction is the XZ plane diagonal, the roller axis is 45°, and shear deformation rolling is performed. times as one cycle, and multi-cycle rolling is carried out, thereby realizing a three-dimensional collaborative rolling mode, which can significantly improve the geometric accuracy and performance consistency of the copper rod, improve the rolling quality of the copper rod, avoid stress concentration, and facilitate multi-directional plastic deformation inside the copper rod, promote grain boundary migration and dynamic recrystallization, and multi-directional deformation leads to dislocation proliferation and interaction, forming a high-density dislocation network, which provides driving force for grain refinement. At the same time, three-dimensional rolling breaks the single texture through multi-directional deformation, promotes the formation of multi-component texture, makes the grain orientation distribution more uniform, reduces anisotropy, and improves grain uniformity; the rollers used in three-dimensional rolling are horizontal rollers, vertical rollers and inclined rollers, among which the inclination angle of the inclined roller can be set to 45° to 90°, and the angle error is controlled within ±0.5°.

[0035] In some embodiments, the number of passes for copper rod rolling can be 10 to 12, and the distribution direction of each roller can change periodically. It can also be used directly with reference to the above content where four passes are a cycle, all of which are within the scope of protection of this case.

[0036] In order to optimize the rolling control method, several passes can be divided into three groups: rough rolling, finishing rolling and shaping. The first few passes are rough rolling, the middle passes are finishing rolling, and the last few passes are shaping. The first few passes use a larger reduction and a lower rolling speed to promote dynamic recrystallization and refine the grains. The middle passes gradually reduce the extrusion amount and increase the rolling speed to control the grain growth. The last few passes use a smaller extrusion amount and a higher rolling speed to improve the surface quality and dimensional accuracy of the copper rod. When the above method is implemented, the process parameters of each stage (such as reduction, rolling speed, temperature) can be optimized. ) can be optimized independently, making it easy to adjust according to the characteristics of the raw materials and product requirements. For example, for high-purity copper billets, the reduction in the roughing stage can be appropriately increased to further refine the grains and reduce defects. A larger reduction in the roughing stage promotes dynamic recrystallization and reduces internal stress concentration. A smaller reduction and higher speed in the shaping stage reduce surface defects such as surface cracks and peeling. This method is mainly suitable for the production of high-performance copper rods. Through staged control, it can better meet the strict requirements of ultra-high voltage copper rods for grain size, strength and surface quality;

[0037] The copper rod rolling process can also be regarded as a whole, so that along the conveying direction of the copper rod, the pressure of the roller gradually decreases and the rolling speed of the roller gradually increases, so as to realize the gradual forming of the copper rod. This method can improve process continuity and production efficiency. The rolling process does not need to be segmented, which reduces the process switching time. It is suitable for large-scale continuous production and can significantly reduce production costs. The change rules of the roller pressure and speed are consistent. The equipment control system is relatively simple and easy to automate, which reduces the complexity of process parameter adjustment and the difficulty of operation. It is suitable for conventional copper rod production. For conventional copper rods with low performance requirements (such as ordinary copper rods for electricity), this method can meet most of the needs. At the same time, due to the continuous rolling process, the intermediate links of frequent changes and adjustments of copper rod heating or cooling are reduced, and energy utilization efficiency is higher.

[0038] During actual rolling, the specified angle can be limited to 45°, so that the copper rod can be subjected to longitudinal (along the length direction) and transverse (along the width direction) deformation forces at the same time during the rolling process, promoting multi-directional deformation, helping to refine the grains, and improving the mechanical properties (such as strength and toughness) of the copper rod. At the same time, it can make the deformation of the copper rod in all directions more uniform and reduce anisotropy. The 45° angle design can reduce the occurrence of surface defects such as surface cracks and peeling during the rolling process, and improve the surface quality of the copper rod. The specific implementation method can be achieved by adjusting the installation angle of the roller to ensure that the rolling direction of each pass forms a 45° angle with the axis of the copper rod.

[0039] S2. The roller is equipped with an adaptive surface correction module to compensate for the copper rod shape error caused by the rolling direction switching;

[0040] In the present invention, the switching of rolling directions, such as from the Y-axis to the Z-axis, changes the stress distribution inside the copper rod, resulting in local strain concentration. Furthermore, the difference in metal flow patterns under different rolling directions can easily lead to cross-sectional shape errors, such as ovalization and angular formation. Furthermore, the direction switching causes changes in deformation heat distribution, leading to inconsistent thermal expansion. Therefore, the use of three-dimensional collaborative rolling will cause the following errors in the copper rod:

[0041] Cross-sectional ovality, diameter deviation (e.g. Y direction +0.1mm), exceeding the standard (required ≤0.05mm);

[0042] Axial warping and copper rod straightness deviation (1.5mm / m) affect subsequent processing and use;

[0043] Surface defects, scratches and cracks reduce product qualification rate;

[0044] To address these drawbacks, an adaptive surface correction module needs to be introduced. This module uses deformation sensing detection structures, such as laser scanning arrays and infrared thermal imagers, to detect the shape of the copper rod in three-dimensional space and compare it with the shape of a standard copper rod of corresponding size. The module then calculates the type of copper rod defect and the specific error amount, and then compensates and corrects the copper rod by changing the roller surface shape so that the copper rod shape meets the requirements. Of course, the correction work is generally completed through subsequent rolling passes.

[0045] It should be noted that there are many ways to change the roll surface, such as changing the roll surface, changing the roll pressure distribution, or changing the roll axis direction. The following is a detailed explanation of each method:

[0046] Changing the roll surface by placing piezoelectric ceramic actuators on or inside the roll surface to adjust the local curvature through micro-displacement. For example, 12 groups of actuators can be evenly distributed, each group can independently control displacement (range ±50μm, accuracy ±0.5μm). Alternatively, the roll surface can be covered with a flexible material (such as a polymer composite material) and the pad thickness distribution can be adjusted through the actuators. For example, the pad thickness adjustment range is 0.1-0.5mm, and the equivalent curvature adjustment range is R50-R200mm.

[0047] Changing the roll pressure distribution by dividing the roll circumference into multiple pressure zones (e.g., 12 zones) and independently adjusting the pressure in each zone. For example, a hydraulic servo system can control the pressure in each zone within a range of 0-20 MPa with an accuracy of ±0.1 MPa. Alternatively, coating the roll surface with smart materials (e.g., shape memory alloys) allows for local stiffness control via temperature or electric fields. For example, the temperature control range can be 20-150°C with a response time of ≤5 ms.

[0048] Changing the direction of the roller axis. In each rolling process, the copper rod is generally rolled by rollers arranged in pairs. The rollers are usually arranged in a manner that the axes of the two rollers in a pair are parallel. In this embodiment, the axes of the two rollers can be offset from each other so that the two axes are at a specified angle. In this way, the contact curve of the two rollers and the copper rod will change, thereby achieving the curved surface adjustment work. Of course, in actual use, the working surface of the roller is generally a curved surface, that is, the roller is generally a U-shaped wheel or similar structure, and its curvature is greater than the curvature of the copper rod, so that when the roller axis is adjusted, the curved surface is adjusted synchronously and the copper rod is always rolled.

[0049] By adopting the above method, problems such as cross-sectional ovality, axial warping and surface defects can be solved at the same time, and the geometric accuracy and surface quality of the copper rod can be significantly improved. At the same time, its response speed is fast, and the shape error caused by rolling direction switching can be detected and compensated in real time to ensure the stability of the rolling process. This module provides key technical guarantees for the high-precision rolling of ultra-high pressure copper rods, greatly improving the product qualification rate, and has significant economic benefits and application value.

[0050] S3, detecting the deformation of the copper rod after each rolling pass, and correcting the rolling gap of the subsequent passes when the deformation exceeds a threshold;

[0051] In the present invention, the deformation of the copper rod can be detected by various methods such as structured light scanner, white light interferometer, ultrasonic thickness gauge, eddy current detector, industrial CT scanning, etc. The specific deformation is the diameter of the copper rod. Of course, other data such as ovality, angular radius, axial warpage, and curvature can also be recorded. The detected data is then compared with the threshold in the theoretical model to generate an error compensation value. The roller spacing is then adjusted by the hydraulic servo mechanism to complete the correction. During the actual correction, the threshold needs to be dynamically adjusted according to the copper rod material, rolling temperature, pass sequence, etc. For example, during high-temperature rolling, the ovality threshold is relaxed to 0.06 mm.

[0052] In some embodiments, the gap correction can be achieved by adjusting the roller position in a subsequent adjacent pass, or by adjusting the roller position in multiple subsequent passes. The adjustment of multiple passes can make the copper rod deformation correction work smoother and the copper rod deformation more uniform. It should be pointed out that the detection of the copper rod deformation can also be achieved by using a laser three-dimensional scanner. When using this equipment, it can be used in combination with the deformation sensing detection structure in the aforementioned correction module, or the laser three-dimensional scanner can be directly used to complete the data collection in the correction module and the data collection of the copper rod deformation. This can reduce the number of detection equipment arranged, saving space and cost.

[0053] S4. Establish a copper rod speed feedback module to detect the linear speed of the rolled copper rod and adjust the linear speed of the roller in the next rolling pass to match the linear speed of the copper rod;

[0054] In the present invention, the copper rod speed feedback module is a key component of the rolling control system. Its function is to dynamically adjust the linear speed of the next pass roller by real-time detection of the copper rod linear speed to ensure that the two are matched, thereby avoiding surface defects (such as scratches and cracks) and dimensional errors caused by speed mismatch.

[0055] The module can be composed of a speed control layer (such as a laser Doppler velocimeter, an encoder, etc.), a control core layer (such as PID, a speed matching algorithm, etc.), and an actuator (such as a private service motor, a frequency converter, etc.). The speed control layer is used to detect the copper rod conveying speed, and the control core layer is used to calculate the optimal matching relationship between the copper rod and the roller linear speed and obtain the roller linear speed data. The roller linear speed can then be adjusted through the actuator. In this way, through real-time detection and dynamic adjustment, high-precision matching of the roller linear speed and the copper rod linear speed is achieved, solving the problems of surface defects and dimensional errors caused by speed mismatch, and providing key technical guarantees for the high-quality rolling of ultra-high voltage copper rods.

[0056] Example 2

[0057] A method for controlling the rolling of an ultra-high-pressure copper rod also includes temperature control, wherein the temperature of the copper rod after each rolling pass is detected. When the detected temperature is higher than a threshold, the copper rod is cooled; when the detected temperature is lower than the threshold, the copper rod is heated.

[0058] In the present invention, temperature control is a key link in ensuring the performance and geometric accuracy of the copper rod. By real-time detection of the copper rod temperature and dynamic adjustment of cooling or heating treatment, material performance degradation (such as grain coarsening, increased residual stress) and shape errors (such as uneven thermal expansion) caused by excessively high or low temperature can be avoided. Temperature detection can be achieved by an infrared thermal imager or a thermocouple array, which can be used alone or in combination. When used in combination, the surface temperature and internal temperature of the copper rod can be detected simultaneously. The detected data is then compared with the theoretical model to generate a temperature distribution map, identify temperature abnormal areas, such as overcooling or overheating, and then the copper rod is heated or cooled according to the abnormal areas to keep the copper rod temperature within the specified range.

[0059] Optimized in the above implementation, the cooling treatment includes primary cooling and secondary cooling, the primary cooling is water mist cooling, and the secondary cooling is liquid nitrogen mist cooling. When the detected temperature is higher than the threshold and the temperature difference is within 0-10°C, the primary cooling is started, and when the temperature difference is above 10°C, the secondary cooling is started; in actual use, two nozzles can be set between adjacent passes, one nozzle for spraying water mist and the other nozzle for spraying liquid nitrogen mist, or several nozzles can be set to surround the copper rod to form an all-round cooling treatment method; through the graded cooling method, the temperature of the copper rod is accurately controlled, and the problems of grain coarsening and performance degradation caused by excessive temperature are solved.

[0060] Optimized in the above implementation, the heating treatment is electromagnetic induction heating; that is, by passing the copper rod through the coil, alternating current is passed through the coil, and an alternating magnetic field is generated by the alternating current through the induction coil. The copper rod induces eddy currents in the magnetic field, and the eddy currents generate Joule heat to heat the copper rod, thereby achieving the effect of rapid heating of the copper rod; the heating temperature can be precisely controlled by current intensity, current frequency, number of coils, etc.

[0061] Optimized in the above embodiment, the method further comprises performing defect detection on the copper rod after each rolling pass, and when the defect signal intensity exceeds a threshold, correcting the rolling force during the subsequent rolling pass;

[0062] In the copper rod rolling process, defect detection and rolling force correction are key links to ensure product quality. By real-time detection of internal and surface defects in the copper rod and dynamic adjustment of subsequent rolling force according to the strength of the defect signal, the expansion of defects can be effectively avoided and the product qualification rate can be improved. Specifically, an ultrasonic probe can be used to emit ultrasonic waves, which are propagated inside the copper rod. When a defect is encountered, a reflected signal is generated. The reflected signal is analyzed by a data acquisition system to determine the location and size of the defect. Alternatively, an eddy current probe can be used to generate an alternating magnetic field inside the copper rod, inducing eddy currents on the surface of the copper rod. Defects are identified by analyzing the changes in the eddy currents. Both methods can achieve the working effect of flaw detection. Of course, in some embodiments, other flaw detection methods can also be used. As long as they can achieve the purpose of this case, they are all within the scope of protection of this case. By analyzing the amplitude and energy of the signal, the size and severity of the defect can be reflected. For example, the signal strength can be set to >5dB (corresponding to defect size >0.2mm) for internal defects, and >3dB (corresponding to crack length >1mm) for surface defects. Defect correction is achieved by adjusting the rolling force. Specifically, reducing the rolling force is mainly applicable to internal defects (such as pores and inclusions) to avoid defect expansion. Increasing the rolling force is mainly applicable to surface defects (such as cracks) to eliminate defects by increasing the reduction. In this way, by performing defect detection and repair on the copper rod after each rolling pass, it can be ensured that the copper rod deforms smoothly throughout the entire rolling process, avoiding the copper rod defects from being hidden inside the copper rod as the rolling work progresses, thereby affecting the copper rod quality.

[0063] Optimized in the above embodiment, the copper rod is rolled by the roller in a pulse rolling manner;

[0064] Specifically, the characteristic of pulse rolling is that the copper rod is rolled with a periodically changing rolling force rather than the traditional continuous constant rolling force. This method can effectively improve the microstructure, mechanical properties and surface quality of the copper rod, and is particularly suitable for high-precision rolling of the copper rod. During pulse rolling, the rolling force can be periodically changed at a certain frequency and amplitude to form a pulsed loading, such as a sine wave, square wave or trapezoidal wave, and its frequency range can be set to 1-10Hz. The periodic stress generated by pulse rolling can promote dynamic recrystallization and refine the grains. The grain size can be reduced from 25.6μm in traditional rolling to 12.3μm. At the same time, the periodic loading makes the internal stress distribution of the copper rod more uniform, reduces the residual stress, and the standard deviation of the residual stress can be reduced from 58MPa to 21MPa. In addition, pulse rolling can reduce cracks and scratches on the surface of the copper rod and improve the processing quality of the copper rod.

[0065] In actual use, the roller can be driven to perform pulse motion through private service hydraulic cylinders, motors, etc.

[0066] In order to further improve the processing quality of copper rods, various data during the copper rod rolling process can be collected and stored, such as rolling speed, roll gap, roll angle, rolling force, etc. During subsequent rolling, the copper rods are rolled based on the collected data, and the data are continuously corrected during the rolling process to continuously improve the rolling level and copper rod processing quality.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for controlling the rolling of an ultra-high pressure copper rod, characterized in that: The following steps are involved: The copper rod is rolled in a three-dimensional collaborative rolling mode in multiple passes, with each rolling direction forming a specified angle with the previous one. The three-dimensional collaborative rolling mode constructs a three-dimensional strain field by spatially alternating the rolling directions during multiple rolling passes. The three-dimensional collaborative rolling mode causes the copper rod to deform in multiple directions by applying pressure alternately in the X, Y, and Z directions. The rolling passes are divided into three groups of rolling processes, and the three groups of rolling processes are rough rolling, finishing rolling and shaping in sequence. The reduction, rolling speed and temperature in each rolling process are optimized independently. The roll pressure of the three groups of rolling processes is gradually reduced, and the rolling speed of the roll is gradually increased. The roller is equipped with an adaptive surface correction module to compensate for the copper rod shape error caused by rolling direction switching; Detect the deformation of the copper rod after each rolling pass. When the deformation exceeds the threshold, correct the gap between the subsequent rolling passes. A copper rod speed feedback module was established to detect the linear speed of the rolled copper rod and adjust the linear speed of the rollers during the next rolling pass to match the linear speed of the copper rod. The method further includes temperature control, wherein the temperature of the copper rod after each rolling pass is detected, and when the detected temperature is higher than a threshold, the copper rod is cooled, and when the detected temperature is lower than the threshold, the copper rod is heated; The cooling process includes primary cooling and secondary cooling. The primary cooling is water mist cooling, and the secondary cooling is liquid nitrogen mist cooling. When the detected temperature is higher than the threshold and the temperature difference is within 0-10°C, the primary cooling is started. When the temperature difference is above 10°C, the secondary cooling is started.

2. The method for controlling ultrahigh voltage copper rod rolling according to claim 1, wherein: The heating treatment is electromagnetic induction heating.

3. The method for controlling ultrahigh voltage copper rod rolling according to claim 1, wherein: The method further comprises performing defect detection on the copper rod after each rolling pass, and when the strength of the defect signal exceeds a threshold, correcting the rolling force during the subsequent rolling passes.

4. The method for controlling ultrahigh voltage copper rod rolling according to claim 1, wherein: The correction method of the adaptive surface correction module includes at least one of changing the roller surface, changing the roller pressure distribution or changing the roller axis direction.

5. The method for controlling ultrahigh voltage copper rod rolling according to claim 1, wherein: The deformation detection uses a laser three-dimensional scanner to collect the copper rod circumference profile data.

6. The method for controlling ultrahigh voltage copper rod rolling according to claim 1, wherein: The number of passes for copper rod rolling is 10 to 12, and along the conveying direction of the copper rod, the pressure of the roller gradually decreases and the rolling speed of the roller gradually increases.

7. The method for controlling ultrahigh voltage copper rod rolling according to claim 1, wherein: The copper rod is rolled by the rollers in a pulse rolling manner.

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