Continuous machining system and method for copper-aluminum composite shunt

Abstract

The invention discloses a continuous machining system and method for a copper-aluminum composite diverter, and belongs to the technical field of machining.After the copper edge of a copper-aluminum composite strip and one side of a resistance alloy strip are aligned and pressed to form an alloy whole, a welding gap is recognized through a first image of the alloy whole, and then the copper edge of the copper-aluminum composite strip and one side of the resistance alloy strip are subjected to continuous machining; the welding position coordinate path is obtained according to the welding gap, the electron beam welding path is automatically provided for electron beam welding equipment, the accuracy of the electron beam welding position is improved, the welding quality is guaranteed, and according to the thickness and material information on the welding position coordinate path, adaptive electron beam welding parameters are intelligently optimized for welding. And the welding quality and the welding efficiency are further improved.

Description

Technical Field

[0001] The present invention relates to the field of processing technologies, and in particular to a continuous processing system and method for a copper-aluminum composite shunt. Background Art

[0002] A current shunt can accurately measure current and ensure the safety and stability of the system. Therefore, it plays a key role in electronic, electrical, and industrial systems.

[0003] The shunt is basically made by continuous welding of strip materials of different materials. Therefore, the welding quality directly affects the quality of the shunt, and welding parameters, such as the acceleration voltage of the electron beam, determine the quality of welding. Therefore, setting appropriate welding parameters can improve the welding quality; In the prior art, usually, welding parameters are set manually according to experience. Such welding parameters have insufficient adaptability, so it is impossible to ensure the welding quality well. Summary of the Invention

[0004] In order to solve the technical problems existing in the prior art, the present invention provides a continuous processing method for a copper-aluminum composite shunt, including the following steps: Pre-treat the metal strip, where the metal strip includes a copper strip, an aluminum strip, and a resistance alloy strip; Weld one side of the copper strip and one side of the aluminum strip to obtain a copper-aluminum composite strip; Weld the copper side of the copper-aluminum composite strip and one side of the resistance alloy strip by electron beam welding, specifically: Align and press one side of the copper-aluminum composite strip and one side of the resistance alloy strip as an alloy whole, and fixedly place it on the welding platform in the electron beam welding equipment; Scan to obtain a first image of the alloy whole, identify the welding gap in the first image, and obtain the welding position coordinate path according to the welding gap; Obtain the thickness and material information of the metal strip on the welding position coordinate path, and optimize the electron beam welding parameters; Perform electron beam welding according to the welding position coordinate path and the optimized electron beam welding parameters.

[0005] Further, the pre-treatment of the metal strip specifically includes: eliminating the initial bending of the metal strip and performing surface deoxidation treatment on the metal strip; The resistance alloy strip is a manganin alloy strip.

[0006] Further, the elimination of the initial bending of the metal strip is specifically: passing the metal strip through a multi-roll straightening machine and adjusting the pressure of the straightening rolls in the multi-roll straightening machine according to the material and thickness of the metal strip; The surface deoxidation treatment of the metal strip is specifically as follows: The metal strip is processed by a vacuum plasma cleaning device, and the parameters of the plasma cleaning device are set according to the material of the metal strip.

[0007] Further, the identification of the welding gap in the first image is specifically as follows: The welding platform area and the overall alloy area are distinguished from the first image by a pre-trained first deep learning model; Multiple first edge lines are obtained from the overall alloy area by an edge algorithm; The copper area and the resistance alloy area are distinguished from the overall alloy area by a pre-trained second deep learning model; The second edge lines that are simultaneously on the copper area and the resistance alloy area are selected from the first edge lines as the welding gap.

[0008] Further, the obtaining of the welding position coordinate path according to the welding gap is specifically as follows: The welding width of the welding gap is obtained, and a coordinate system is established on the welding platform with the welding width as the unit coordinate dimension; The welding coordinates on multiple welding gaps are obtained according to the coordinate system, and the welding position coordinate path is formed according to the welding coordinates.

[0009] Further, the material information includes the thermal conductivity k1 and melting point t1 of the copper edge material, and the thermal conductivity k2 and melting point t2 of the resistance alloy material.

[0010] Further, the optimization of the electron beam welding parameters includes the optimization of the accelerating voltage, specifically as follows: ; ; ; ; Among them, V represents the optimized accelerating voltage, V1 represents the accelerating voltage for the copper edge material, V2 represents the accelerating voltage for the resistance alloy material, V0 represents the preset reference voltage, which is set according to the thickness on the welding position coordinate path, k represents the average thermal conductivity, represents the preset thermal conductivity compensation coefficient.

[0011] Further, the optimization of the electron beam welding parameters also includes the optimization of the working distance of the electron gun, specifically as follows: The average energy conversion efficiency and the equivalent thermal conductivity are obtained: ; ; Obtain the optimized working distance d of the electron gun according to the average energy conversion efficiency, equivalent thermal conductivity, optimized acceleration voltage, and thickness on the welding position coordinate path through a pre-trained third deep learning model; Among them, is expressed as the average energy conversion efficiency, is expressed as the energy conversion efficiency of the copper edge material, which characterizes the absorption ability of the electron beam energy, is expressed as the energy conversion efficiency of the resistance alloy material, and k3 is expressed as the equivalent thermal conductivity.

[0012] Furthermore, the optimization of the electron beam welding parameters also includes optimizing the welding speed of the electron gun, specifically: ; Among them, v is expressed as the optimized welding speed of the electron gun, v0 is expressed as the preset initial welding speed of the electron gun, d0 is expressed as the preset initial working distance of the electron gun, and a is expressed as the preset correction factor.

[0013] The present invention also provides a continuous processing system for copper-aluminum composite shunts, including: A pretreatment unit for pretreating the metal strip, where the metal strip includes a copper strip, an aluminum strip, and a resistance alloy strip; A first welding unit for welding one side of the copper strip and one side of the aluminum strip to obtain a copper-aluminum composite strip; A second welding unit for welding one side of the copper edge of the copper-aluminum composite strip and one side of the resistance alloy strip by electron beam welding, specifically: Align and press one side of the copper edge of the copper-aluminum composite strip and one side of the resistance alloy strip as an alloy whole, and fixedly place it on the welding platform in the electron beam welding equipment; Scan to obtain a first image of the alloy whole, identify the welding gap in the first image, and obtain the welding position coordinate path according to the welding gap; Obtain the thickness and material information on the welding position coordinate path, and optimize the electron beam welding parameters; Perform electron beam welding according to the welding position coordinate path and the optimized electron beam welding parameters.

[0014] Compared with the prior art, the beneficial effects of the present invention are: After aligning and pressing the copper side of the copper-aluminum composite strip with one side of the resistance alloy strip to form an alloy integral, the welding gap is identified through the first image of the alloy integral, and the welding position coordinate path is obtained based on the welding gap, so as to automatically provide the welding path of the electron beam for the electron beam welding equipment, improve the accuracy of the electron beam welding position, ensure the welding quality, and intelligently optimize the adaptable electron beam welding parameters for welding according to the thickness and material information on the welding position coordinate path, further improving the welding quality and welding efficiency; One side of the copper strip welded to the aluminum strip is processed into an outward convex dovetail structure to form a dovetail copper edge, and one side of the aluminum strip welded to the copper strip is processed into an inward concave dovetail structure to form a dovetail aluminum edge. The outward convex dovetail structure and the inward concave dovetail structure are mutually embedded to obtain a dovetail embedding structure. Through the combination of welding and mechanical structure, the firmness of the welding of the copper strip and the aluminum strip is improved, ensuring the quality of the final shunt product; By distinguishing the copper area and the resistance alloy area from the alloy integral area, the welding gap is screened and identified from multiple first edge lines obtained through the edge algorithm according to the material area, thus ensuring the accuracy of the welding position coordinate path and further ensuring the accuracy of the welding position; By optimizing the accelerating voltage, the balance of the penetration depth is achieved, and the welding efficiency and quality are improved; the working distance of the electron gun is optimized according to the optimized accelerating voltage. By matching the accelerating voltage with the working distance of the electron gun, the adaptability of the working distance of the electron gun is improved, significantly improving the focusing performance of the electron beam while suppressing the offset or jitter of the electron beam, and further improving the welding quality; the welding speed of the electron gun is optimized according to the optimized accelerating voltage and the optimized working distance of the electron gun, realizing the dynamic balance of energy input, heat distribution and production efficiency, ensuring the welding quality while improving the welding efficiency; It solves the problem that it is difficult to weld and connect copper and aluminum materials after the shunt parts currently in use are converted from all-copper electrodes to copper-aluminum structures, enabling the shunt parts to be converted from pure copper end electrodes to copper-aluminum end electrodes, and making it possible to achieve excellent welding effects between the copper-aluminum end electrodes of the shunt and aluminum busbar conductors. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings here are incorporated into the specification and form a part of this specification, indicating the embodiments that conform to the present invention and are used together with the specification to explain the principles of the present invention.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1It is a flowchart of a continuous processing method for a copper-aluminum composite shunt of the present invention; Figure 2 It is a flowchart of step S3 in a continuous processing method for a copper-aluminum composite shunt of the present invention; Figure 3 It is a front view structure diagram of a copper-aluminum composite shunt of the present invention; Figure 4 It is a side view structure diagram of a copper-aluminum composite shunt of the present invention. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indication will also change accordingly.

[0020] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0021] Embodiment 1 Refer to Figure 1 and Figure 2 As shown, a continuous processing method for a copper-aluminum composite shunt provided by the present invention specifically includes the following steps: S1. Pretreat the metal strip, and the metal strip includes a copper strip, an aluminum strip, and a resistance alloy strip; S2. Weld one side of the copper strip to one side of the aluminum strip to obtain a copper-aluminum composite strip; S3. Weld the copper side of the copper-aluminum composite strip to one side of the resistance alloy strip by electron beam welding.

[0022] S1. Pre-treat the metal strip, where the metal strip includes a copper strip, an aluminum strip, and a resistance alloy strip.

[0023] In step S1, the pre-treatment of the metal strip is specifically as follows: S11. Eliminate the initial bending of the metal strip; S12. Perform surface deoxidation treatment on the metal strip.

[0024] In step S1, the resistance alloy strip is a manganin alloy strip.

[0025] In step S11, the elimination of the initial bending of the metal strip is specifically as follows: Pass the metal strip through a multi-roll straightening machine and adjust the pressure of the straightening rolls in the multi-roll straightening machine according to the material and thickness of the metal strip.

[0026] Step S11 eliminates initial deformations such as waviness and warping generated during transportation or storage, ensures the fitting accuracy of subsequent processing, reduces stress concentration caused by bending, and prevents cracking or dimensional deviation during the processing.

[0027] In step S12, the surface deoxidation treatment of the metal strip is specifically as follows: Pass the metal strip through a vacuum plasma cleaning device and set the parameters of the plasma cleaning device according to the material of the metal strip.

[0028] Step S12 uses the plasma to remove the metal surface oxides through the dual effects of physical bombardment (ion kinetic energy) and chemical reaction (gas reduction / decomposition), and there is no chemical solution residue. After the oxidation treatment, the interfacial bonding strength during subsequent lamination or welding is improved, and the decrease in conductivity or the peeling of the composite layer caused by the oxide layer is avoided.

[0029] S2. Weld one side of the copper strip to one side of the aluminum strip to obtain a copper-aluminum composite strip.

[0030] In step S2, the welding of one side of the copper strip to one side of the aluminum strip is specifically as follows: S21. Process one side of the copper strip welded to the aluminum strip into an outward convex dovetail structure to form a dovetail copper edge, and process one side of the aluminum strip welded to the copper strip into an inward concave dovetail structure to form a dovetail aluminum edge, where the outward convex dovetail structure and the inward concave dovetail structure are mutually engaged; S22. Perform an engagement welding on the dovetail copper edge and the dovetail aluminum edge to obtain a copper-aluminum composite strip.

[0031] In this solution, one side of the copper strip welded to the aluminum strip is processed into an outwardly convex dovetail structure to form a dovetail copper edge, and one side of the aluminum strip welded to the copper strip is processed into an inwardly concave dovetail structure to form a dovetail aluminum edge. The outwardly convex dovetail structure and the inwardly concave dovetail structure are mutually engaged to obtain a dovetail engagement structure. Through the combination of welding and mechanical structure, the welding firmness of the copper strip and the aluminum strip is improved, ensuring the quality of the final shunt product.

[0032] As Figure 4 shown, the mutual engagement of the outwardly convex dovetail structure and the inwardly concave dovetail structure is specifically achieved by the inclined surface of the outwardly convex dovetail structure and the inclined surface of the inwardly concave dovetail structure for inclined composite inlay.

[0033] It should be noted that the number of inward concavities of the inwardly concave dovetail structure and the number of outward protrusions of the outwardly convex dovetail structure are not limited.

[0034] S3. Weld one side of the copper edge of the copper-aluminum composite strip and one side of the resistance alloy strip by electron beam welding.

[0035] In step S3, the welding of one side of the copper edge of the copper-aluminum composite strip and one side of the resistance alloy strip by electron beam welding is specifically as follows: S31. Align and press one side of the copper edge of the copper-aluminum composite strip and one side of the resistance alloy strip as an alloy whole, and fixedly place it on the welding platform in the electron beam welding equipment; S32. Scan to obtain the first image of the alloy whole, and identify the welding gap in the first image, and obtain the welding position coordinate path according to the welding gap; S33. Obtain the thickness and material information of the metal strip on the welding position coordinate path, and optimize the electron beam welding parameters. The electron beam welding parameters include the working distance of the electron gun, the moving speed, the accelerating voltage, and the vacuum pumping rate; S34. Perform electron beam welding according to the welding position coordinate path and the optimized electron beam welding parameters.

[0036] In step S32, the first image includes the upper surface image of the alloy whole and the upper surface image of the welding platform.

[0037] In step S32, the identification of the welding gap in the first image is specifically as follows: S3211. Distinguish the welding platform area and the alloy whole area from the first image through a pre-trained first deep learning model; S3212. Obtain multiple first edge lines from the alloy whole area through an edge algorithm; S3213. Distinguish the copper area and the resistance alloy area from the alloy whole area through a pre-trained second deep learning model; S3214. Select the second edge line that is simultaneously on the copper region and the resistance alloy region from the first edge lines as the welding gap.

[0038] In this solution, by distinguishing the copper region and the resistance alloy region from the overall alloy region, and screening and identifying the welding gap from multiple first edge lines obtained by the edge algorithm according to the material regions, the accuracy of the welding position coordinate path is ensured, and thus the accuracy of the welding position is guaranteed.

[0039] In step S32, the obtaining of the welding position coordinate path according to the welding gap is specifically as follows: S3221. Obtain the welding width of the welding gap, and establish a coordinate system on the welding platform with the welding width as the unit coordinate dimension; S3222. Obtain the welding coordinates on multiple welding gaps according to the coordinate system, and form a welding position coordinate path according to the welding coordinates.

[0040] In step S33, the material information includes the thermal conductivity and melting point of the copper edge material, and the thermal conductivity and melting point of the resistance alloy material.

[0041] In step S33, the optimization of the electron beam welding parameters includes optimizing the acceleration voltage, specifically: ; ; ; ; Among them, V represents the optimized acceleration voltage, V1 represents the acceleration voltage for the copper edge material, V2 represents the acceleration voltage for the resistance alloy material, V0 represents the preset reference voltage, which is set according to the thickness on the welding position coordinate path, k1 represents the thermal conductivity of the copper edge material, k2 represents the thermal conductivity of the resistance alloy material, k represents the average thermal conductivity, represents the preset thermal conductivity compensation coefficient.

[0042] It should be noted that if V is greater than the maximum acceleration voltage Vmax of the electron beam welding equipment used, then V = Vmax; if V is less than the minimum acceleration voltage Vmin of the electron beam welding equipment used, then V = Vmin.

[0043] In electron beam welding, too high an acceleration voltage may lead to an increase in equipment cost and the need for X-ray shielding, while insufficient acceleration voltage affects the penetration ability. Therefore, this solution optimizes the acceleration voltage to balance the penetration depth, improve the welding efficiency and quality.

[0044] In step S33, the optimization of the electron beam welding parameters further includes optimizing the working distance of the electron gun, specifically: Obtain the average energy conversion efficiency and the equivalent thermal conductivity: ; ; The optimized working distance d of the electron gun is obtained by a pre-trained third deep learning model according to the average energy conversion efficiency, the equivalent thermal conductivity, the optimized acceleration voltage, and the thickness on the welding position coordinate path. The working distance of the electron gun is the vertical height from the electron gun to the interface where the welding position coordinate path is located; Among them, is expressed as the average energy conversion efficiency, is expressed as the energy conversion efficiency of the copper edge material, which characterizes the absorption ability of the electron beam energy, is expressed as the energy conversion efficiency of the resistance alloy material, k3 is expressed as the equivalent thermal conductivity, k1 is expressed as the thermal conductivity of the copper edge material, k2 is expressed as the thermal conductivity of the resistance alloy material, t1 is expressed as the melting point of the copper edge material, and t2 is expressed as the melting point of the resistance alloy material.

[0045] The third deep learning model is trained using a large number of different welding test data with qualified welding quality, including single materials, corresponding energy conversion efficiency, thermal conductivity, acceleration voltage, welding thickness, and corresponding working distances of the electron gun as the training set. The input parameters include energy conversion efficiency, thermal conductivity, acceleration voltage, and welding thickness, and the output parameter is the working distance of the electron gun.

[0046] In electron beam welding, if the working distance of the electron gun is too large, the probability of collision between the electron beam and residual gas molecules during transmission will increase, causing scattering, reducing the energy concentration, which will reduce the weld penetration depth, increase the weld width, and even cause incomplete penetration defects. If the beam spot diameter is too small or the focusing current is too high, it is easy to cause electron beam deviation or jitter, affecting the welding accuracy; In this solution, the working distance of the electron gun is optimized according to the optimized acceleration voltage. By matching the acceleration voltage with the working distance of the electron gun, the adaptability of the working distance of the electron gun is improved, the focusing performance of the electron beam is significantly improved, and the electron beam deviation or jitter is suppressed, further improving the welding quality.

[0047] In step S33, the optimization of the electron beam welding parameters further includes optimizing the welding speed of the electron gun, specifically: ; Among them, v represents the optimized electron gun welding speed, v0 represents the preset initial electron gun welding speed, V represents the optimized acceleration voltage, V0 represents the preset reference voltage, d0 represents the preset initial electron gun working distance, d represents the optimized electron gun working distance, and a represents the preset correction factor.

[0048] In electron beam welding, if the electron gun welding speed is too high, it will reduce the energy input per unit length, resulting in insufficient penetration depth and reducing the weld formation quality. If it is too low, it will cause heat accumulation, leading to burn-through of thin plates or deformation of workpieces due to local overheating.

[0049] In this solution, the electron gun welding speed is optimized according to the optimized acceleration voltage and the optimized electron gun working distance to achieve a dynamic balance among energy input, heat distribution, and production efficiency, ensuring welding quality while improving welding efficiency.

[0050] The acceleration voltage affects the kinetic energy of the electron beam. When the voltage increases, the energy input to the workpiece per unit time increases. In this solution, the optimized acceleration voltage is used as the numerator. When the acceleration voltage increases, the welding speed is increased to shorten the energy action time and avoid overheating of the molten pool due to excessive energy. When the electron gun working distance increases, the diameter of the electron beam spot linearly increases, resulting in the beam spot area expanding at a square rate. The energy density of the electron beam is inversely proportional to the electron gun working distance. To maintain the energy density required for penetration, the speed needs to be reduced to extend the energy action time. Therefore, in this solution, the optimized electron gun working distance is used as the denominator.

[0051] It should be noted that if v is greater than the maximum moving speed vmax of the electron gun of the electron beam welding equipment used, then v = vmax; if v is less than the minimum moving speed vmin of the electron gun of the electron beam welding equipment used, then v = vmin.

[0052] Embodiment 2 The present invention also provides a continuous processing system for copper-aluminum composite shunts provided by the present invention, specifically including: A pretreatment unit for pretreating metal strips, where the metal strips include copper strips, aluminum strips, and resistance alloy strips; A first welding unit for welding one side of a copper strip and one side of an aluminum strip to obtain a copper-aluminum composite strip; A second welding unit for welding the copper side of the copper-aluminum composite strip and one side of the resistance alloy strip by electron beam welding, specifically: Align and press the copper side of the copper-aluminum composite strip and one side of the resistance alloy strip as an alloy whole and fixedly place it on the welding platform in the electron beam welding equipment; Scan to obtain a first image of the entire alloy, identify the welding seam in the first image, and obtain the welding position coordinate path based on the welding seam; Obtain the thickness and material information on the welding position coordinate path, and optimize the electron beam welding parameters; Perform electron beam welding according to the welding position coordinate path and the optimized electron beam welding parameters.

[0053] The metal strip includes a copper strip, an aluminum strip, and a resistance alloy strip; the resistance alloy strip is a manganese copper alloy strip.

[0054] The pretreatment of the metal strip specifically includes: eliminating the initial bending of the metal strip and performing surface deoxidation treatment on the metal strip.

[0055] The elimination of the initial bending of the metal strip is specifically: Pass the metal strip through a multi-roll straightening machine and adjust the pressure of the straightening rolls in the multi-roll straightening machine according to the material and thickness of the metal strip.

[0056] The surface deoxidation treatment of the metal strip is specifically: Pass the metal strip through a vacuum plasma cleaning device and set the parameters of the plasma cleaning device according to the material of the metal strip.

[0057] The welding of one side of the copper strip to one side of the aluminum strip is specifically: Process one side of the copper strip welded to the aluminum strip into an outward convex dovetail structure to form a dovetail copper edge, and process one side of the aluminum strip welded to the copper strip into an inward concave dovetail structure to form a dovetail aluminum edge, and the outward convex dovetail structure and the inward concave dovetail structure are mutually engaged; Perform an engaging weld on the dovetail copper edge and the dovetail aluminum edge to obtain a copper-aluminum composite strip.

[0058] The welding of the copper edge of the copper-aluminum composite strip to one side of the resistance alloy strip by electron beam welding is specifically: Align and press the copper edge of the copper-aluminum composite strip and one side of the resistance alloy strip as the entire alloy, and fixedly place it on the welding platform in the electron beam welding equipment; Scan to obtain a first image of the entire alloy, identify the welding seam in the first image, and obtain the welding position coordinate path based on the welding seam; Obtain the thickness and material information on the welding position coordinate path, and optimize the electron beam welding parameters. The electron beam welding parameters include the working distance of the electron gun, the moving speed, the accelerating voltage, and the vacuum pumping rate; Perform electron beam welding according to the welding position coordinate path and the optimized electron beam welding parameters.

[0059] The first image includes an upper surface image of the entire alloy and an upper surface image of the welding platform.

[0060] The identifying of the welding gap in the first image is specifically as follows: distinguishing the welding platform area and the overall alloy area from the first image by using a pre-trained first deep learning model; Acquire a plurality of first edge lines from the entire alloy region by using an edge algorithm; Using a pre-trained second deep learning model, the copper region and the resistive alloy region are distinguished from the overall alloy region. A second edge line located on both the copper region and the resistance alloy region is selected from the first edge lines as a welding gap.

[0061] The welding position coordinate path is obtained according to the welding gap, specifically: Obtain the welding width of the welding gap and use the welding width as the unit coordinate size to establish a coordinate system on the welding platform; The welding coordinates on the plurality of welding gaps are obtained according to the coordinate system, and the welding position coordinate path is formed according to the welding coordinates.

[0062] The material information includes the thermal conductivity and melting point of the copper edge material, and the thermal conductivity and melting point of the resistance alloy material.

[0063] The optimization of electron beam welding parameters includes optimizing the acceleration voltage, optimizing the electron gun working distance, and optimizing the electron gun welding speed, and the specific method is consistent with the above method embodiment.

[0064] Example 3 like Figure 3 and Figure 4 As shown, the present invention provides a copper-aluminum composite shunt, which is manufactured by the above-mentioned copper-aluminum composite shunt continuous processing method.

[0065] The copper-aluminum composite shunt comprises a copper strip, an aluminum strip and a resistance alloy strip; One side of the copper strip is welded to one side of the aluminum strip, and the other side of the copper strip is welded to one side of the resistance alloy strip; One side of the copper strip welded to the aluminum strip is a convex dovetail structure, and one side of the aluminum strip welded to the copper strip is a concave dovetail structure. The convex dovetail structure and the concave dovetail structure are embedded in each other.

[0066] The outer convex dovetail structure and the inner concave dovetail structure are interlocked with each other specifically by performing oblique composite inlaying of the oblique surface of the outer convex dovetail structure and the oblique surface of the inner concave dovetail structure.

[0067] It should be noted that the number of concavities of the concave dovetail structure and the number of convexities of the convex dovetail structure are not limited.

[0068] Embodiment 4 The present invention also provides an electronic device, including: a processor, a sending device, an input device, an output device, and a memory. The processor can be implemented in ways such as a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit, or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application. The memory can be implemented in forms such as a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM), etc., and is used to store computer program codes. The computer program codes include computer instructions. When the processor executes the computer instructions, the electronic device executes the method in any of the above possible implementation manners.

[0069] Embodiment 5 The present invention also provides a computer-readable storage medium. A computer program is stored in the computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by the processor of the electronic device, the processor is caused to execute the method in any of the above possible implementation manners.

[0070] The beneficial effects of the present invention are as follows: After aligning and pressing the copper side of the copper-aluminum composite strip with one side of the resistance alloy strip as an alloy whole, the present invention identifies the welding seam through the first image of the alloy whole, obtains the welding position coordinate path based on the welding seam, automatically provides the welding path of the electron beam for the electron beam welding device, improves the accuracy of the electron beam welding position, ensures the welding quality, and intelligently optimizes the adaptable electron beam welding parameters for welding according to the thickness and material information on the welding position coordinate path, further improving the welding quality and welding efficiency; One side of the copper strip welded to the aluminum strip is processed into a convex dovetail structure to form a dovetail copper edge, and one side of the aluminum strip welded to the copper strip is processed into a concave dovetail structure to form a dovetail aluminum edge. The convex dovetail structure and the concave dovetail structure are mutually engaged to obtain a dovetail engagement structure. Through the combination of welding and mechanical structure, the firmness of the welding of the copper strip and the aluminum strip is improved, ensuring the quality of the final shunt product; By distinguishing the copper region and the resistance alloy region from the alloy whole region, and screening and identifying the welding seam from multiple first edge lines obtained through the edge algorithm according to the material region, the accuracy of the welding position coordinate path is ensured, and thus the accuracy of the welding position is ensured; By optimizing the acceleration voltage, the balance of penetration depth is achieved, and the welding efficiency and quality are improved. According to the optimized acceleration voltage, the working distance of the electron gun is optimized. By matching the acceleration voltage with the working distance of the electron gun, the adaptability of the working distance of the electron gun is improved, the focusing performance of the electron beam is significantly improved while suppressing the deviation or jitter of the electron beam, and the welding quality is further improved. According to the optimized acceleration voltage and the optimized working distance of the electron gun, the welding speed of the electron gun is optimized to achieve the dynamic balance of energy input, heat distribution and production efficiency, improve the welding efficiency while ensuring the welding quality. The present invention solves the problem that it is difficult to weld and connect copper and aluminum after the shunt parts currently in use are converted from all-copper electrodes to copper-aluminum structures, enabling the shunt parts to be converted from pure copper end electrodes to copper-aluminum end electrodes, and achieving excellent welding effects between the copper-aluminum end electrodes of the shunt and aluminum busbar wires.

[0071] In the description of the specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0072] In addition, in each embodiment of the present application, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units. If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes multiple instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store programs.

[0073] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A continuous processing method for a copper-aluminum composite shunt, characterized in that, Including the following steps: Pre-treat the metal strip, where the metal strip includes a copper strip, an aluminum strip, and a resistance alloy strip; Weld one side of the copper strip to one side of the aluminum strip to obtain a copper-aluminum composite strip; Weld the copper side of the copper-aluminum composite strip to one side of the resistance alloy strip by electron beam welding, specifically: Align and press the copper side of the copper-aluminum composite strip with one side of the resistance alloy strip as an alloy whole and fix it on the welding platform in the electron beam welding equipment; Scan to obtain a first image of the alloy whole, identify the welding gap in the first image, and obtain the welding position coordinate path according to the welding gap; Obtain the thickness and material information of the metal strip on the welding position coordinate path and optimize the electron beam welding parameters; Perform electron beam welding according to the welding position coordinate path and the optimized electron beam welding parameters.

2. The continuous processing method of the copper-aluminum composite shunt according to claim 1, wherein, The pre-treatment of the metal strip specifically includes: eliminating the initial bending of the metal strip and performing surface deoxidation treatment on the metal strip; The resistance alloy strip is a manganese copper alloy strip.

3. The continuous processing method of the copper-aluminum composite shunt according to claim 2, characterized in that, The elimination of the initial bending of the metal strip is specifically: passing the metal strip through a multi-roll straightening machine and adjusting the pressure of the straightening rolls in the multi-roll straightening machine according to the material and thickness of the metal strip; The surface deoxidation treatment of the metal strip is specifically: passing the metal strip through a vacuum plasma cleaning equipment and setting the parameters of the plasma cleaning equipment according to the material of the metal strip.

4. The continuous processing method of the copper-aluminum composite shunt according to claim 1, characterized in that, The identification of the welding gap in the first image is specifically: Distinguish the welding platform area and the alloy whole area from the first image through a pre-trained first deep learning model; Obtain multiple first edge lines from the alloy whole area through an edge algorithm; Distinguish the copper area and the resistance alloy area from the alloy whole area through a pre-trained second deep learning model; Select the second edge lines that are simultaneously on the copper area and the resistance alloy area from the first edge lines as the welding gap.

5. The continuous processing method of the copper-aluminum composite shunt according to claim 1, characterized in that, The obtaining of the welding position coordinate path according to the welding gap is specifically: Obtain the welding width of the welding gap, use the welding width as the unit coordinate size to establish a coordinate system on the welding platform; Obtain the welding coordinates on multiple welding gaps according to the coordinate system, and form the welding position coordinate path according to the welding coordinates.

6. The continuous processing method of the copper-aluminum composite shunt according to claim 1, characterized in that The material information includes the thermal conductivity k1 and melting point t1 of the copper side material, and the thermal conductivity k2 and melting point t2 of the resistance alloy material.

7. The continuous processing method of the copper-aluminum composite shunt according to claim 6, characterized in that The optimization of the electron beam welding parameters includes optimizing the acceleration voltage, specifically: ； ； ； ； Among them, V represents the optimized acceleration voltage, V1 represents the acceleration voltage for the copper edge material, V2 represents the acceleration voltage for the resistance alloy material, V0 represents the preset reference voltage, which is set according to the thickness on the welding position coordinate path, k represents the average thermal conductivity, represents the preset thermal conductivity compensation coefficient.

8. The continuous processing method of the copper-aluminum composite shunt according to claim 7, characterized in that The optimization of the electron beam welding parameters also includes optimizing the electron gun working distance, specifically: Obtain the average energy conversion efficiency and the equivalent thermal conductivity: ； ； Obtain the optimized electron gun working distance d through a pre-trained third deep learning model according to the average energy conversion efficiency, the equivalent thermal conductivity, the optimized acceleration voltage, and the thickness on the welding position coordinate path; Among them, is expressed as the average energy conversion efficiency, is expressed as the energy conversion efficiency of the copper edge material, which characterizes the absorption ability of the electron beam energy, is expressed as the energy conversion efficiency of the resistance alloy material, and k3 is expressed as the equivalent thermal conductivity.

9. The continuous processing method of the copper-aluminum composite shunt according to claim 8, characterized in that, The optimization of the electron beam welding parameters also includes optimizing the electron gun welding speed, specifically: ； Wherein, v represents the optimized welding speed of the electron gun, v0 represents the preset initial welding speed of the electron gun, d0 represents the preset initial working distance of the electron gun, and a represents the preset correction factor.

10. A continuous processing system for a copper-aluminum composite shunt, which applies the continuous processing method for a copper-aluminum composite shunt according to any one of claims 1 to 9, characterized in that, Including: A pretreatment unit for pretreating the metal strip, where the metal strip includes a copper strip, an aluminum strip, and a resistance alloy strip; A first welding unit for welding one side of the copper strip and one side of the aluminum strip to obtain a copper-aluminum composite strip; A second welding unit for welding one side of the copper edge of the copper-aluminum composite strip and one side of the resistance alloy strip by electron beam welding, specifically: Aligning and pressing one side of the copper edge of the copper-aluminum composite strip and one side of the resistance alloy strip as an alloy whole, and fixedly placing it on the welding platform in the electron beam welding equipment; Scanning to obtain a first image of the alloy whole, identifying the welding gap in the first image, and obtaining the welding position coordinate path according to the welding gap; Obtaining the thickness and material information on the welding position coordinate path, and optimizing the electron beam welding parameters; Performing electron beam welding according to the welding position coordinate path and the optimized electron beam welding parameters.

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