Clad welding method of large-size copper-clad aluminium wire
A technology of cladding welding and copper clad aluminum wire, which is applied in the field of cladding welding method of large-size copper clad aluminum wire, can solve the problems of inability to use large transformers, difficult joints, low resistivity, etc.
Inactive Publication Date: 2011-08-03
苏州市吴江神州双金属线缆有限公司
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Problems solved by technology
However, due to its own narrowness, it usually cannot be adopted by large transformers.
[0005] Large-scale copper-clad aluminum enameled wire has a thicker radius and lower resistivity. It is suitable for large-scale transformers, but it is prone to burrs during the cladding welding process, poor copper-aluminum bonding, and the enamelled wire is too soft and easy to break. difficulty
Method used
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Experimental program
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Embodiment Construction
[0021] Large-size copper-clad aluminum enameled wire, which includes a core wire and a lacquer layer located outside the core wire. The lacquer layer covers the core wire. The core wire includes an aluminum core and a copper layer covering the aluminum core. The diameter of the core wire It is 3.000-5.000mm. The weight of the copper layer accounts for 30%-40% of the weight of the core wire. The paint layer includes a first paint layer and a second paint layer covering the first paint layer. The first layer of paint is made of heat-resistant polyester material with a thickness of 0.02mm. The material of the second layer of paint is polyester imine with a thickness of 0.10 mm.
[0022] The core wire diameter of large copper clad aluminum enameled wire is 3.000-5.000mm, and the resistivity is less than or equal to 0.0257Ω·mm at room temperature 2 / m, thermal shock (temperature: 200℃, elongation 25%, time 30min) paint layer does not crack, solvent resistance: the hardness of the pa...
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Abstract
The invention relates to a clad welding method of a large-size copper-clad aluminium wire, which is characterized by comprising the following steps of: conveying a copper strip and an aluminum core while cleaning the surface oxide layers of the copper strip and the aluminum core; regulating the speed of the copper strip and the aluminum core to ensure that the copper strip and the aluminum core synchronously advance; twisting the copper strip during the synchronous advancing process of the copper strip and the aluminum core to ensure that the copper strip encases the aluminum core till the copper strip is shaped like a round tube; welding the butt joint edges of the copper strip to form a copper-clad aluminium wire; and removing the residual stress of the copper-clad aluminium wire through a heat treatment method. By adopting the clad welding method provided by the invention, the problems that the burr is easy to emerge, the combination of copper and aluminium is poor, the enamel covering is too soft and easy to break and the jointing is difficult in the process of copper-clad aluminium cladding can be effectively solved.
Description
Technical field [0001] The invention relates to a cladding welding method, in particular to a cladding welding method of large-size copper-clad aluminum wire. Background technique [0002] Enameled wire is a main type of winding wire. It consists of a conductor and an insulating layer. After the bare wire is softened by annealing, it is painted and baked many times. However, it is not easy to produce products that not only meet the requirements of the standards, but also meet the requirements of customers. It is affected by the quality of raw materials, process parameters, production equipment, environment and other factors. Therefore, the quality characteristics of various enameled wires are different, but they all have Mechanical properties, chemical properties, electrical properties, and thermal properties are four major properties. [0003] Copper clad aluminum enameled wire is one of the more commonly used enameled wires. Copper-clad aluminum enameled wire is a new type of m...
Claims
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IPC IPC(8): B23K9/16B23K9/235B23K9/095
Inventor 张建峰
Owner 苏州市吴江神州双金属线缆有限公司