Copper wire and method for preparing shielding copper wire mesh

Abstract

The invention discloses a copper wire and a method for preparing a shielding copper wire mesh. The copper wire comprises the following ingredients: no larger than 0.0025 wt% of Si, no larger than 0.0025 wt% of Mn, no larger than 0.0025 wt% of Ni, no larger than 0.01 wt% of O, no larger than 0.005 wt% of Bi, no larger than 0.008 wt% of P, no larger than 0.008 wt% of S, no larger than 0.0025 wt% of Fe, no larger than 0.003 wt% of As, and the balance consisting of Cu and other inevitable impurities. The method comprises the following steps: a) weighing the ingredients according to the weight percentage; b) conducting vacuum induction melting; c) forging a copper blank; d) processing round bars; e) conducting solid solution treatment; f) annealing; g) drawing into wires; h) conducting bending molding; i) arranging inverted V-shaped skeletons; j) welding by precise resistance spot welding; k) shaping a copper wire mesh; l) conducting surface treatment of the copper wire mesh; and m) conducting heat setting. According to the invention, high purity cathode copper with the purity of no less than 99.99% is used as a raw material of the shielding copper wire mesh, and the impurities in the copper wire material are strictly controlled to guarantee the shielding effect of the shielding copper wire mesh.

Description

technical field [0001] The invention relates to a shielding copper mesh, in particular to a copper wire and a method for preparing the shielding copper mesh. Background technique [0002] Depending on the material, the metal mesh can be ordinary copper mesh, stainless steel mesh, aluminum mesh, copper mesh, brass mesh, titanium mesh, molybdenum mesh, nickel-chrome mesh, etc., and its forming methods are mostly metal or Alloy wire braiding also adopts methods such as cutting and forming, chemical deposition and so on. [0003] In terms of shielding nets abroad, aluminum alloys and copper alloys have been used to manufacture lightning protection nets. Aluminum nets have always been used as lightning protection materials in aerospace at home and abroad due to their good conductivity and low density. With the application of carbon fiber reinforced composite materials, galvanic corrosion will occur between the traditional aluminum mesh and carbon fiber, which will affect its cor...

AI Technical Summary

Problems solved by technology

[0005] Domestic copper mesh products are woven with copper wire. Although the material is copper, there is still a big gap with foreign samples in terms of shape, pitch, wire cross section, etc., and it is processed according to this standard. The copper mesh not only has a great influence on the quality of the subsequent processed products, but more importantly, because the mesh processed by this standard has many non-connected intersection points, which directly affects the export of current. Under the action of high voltage such as lightning, it is easy to Generate cross discharge and affect rotor safety

[0006] It is understood that there has not been a special research and development work on the production of copper mesh by fine wire and micro-point precision resistance spot welding in China, and no in-depth research has been carried out on the processing and manufacturing technology of imported copper mesh and the surface treatment technology of copper mesh. At present, this high-quality Shielded copper mesh is still in the hands of developed countries in Europe and the United States

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