连续挤压铜包钢线材工程化关键问题实验研究

【作者】 李玉章；

【导师】 钟毅；

【作者基本信息】 昆明理工大学 ， 材料学， 2010， 硕士

【摘要】 铜包钢线在性能上兼备了钢的机械性能和铜的电学性能,因而具有传导效率高、材料成本低、抗拉断力大、耐磨损等特点,广泛应用于电力、通讯、电子、化工等领域。目前铜包钢线材的生产方法主要有机械包覆法、熔铜浸渍法、电镀法。机械包覆法修整处置量较大,铜带利用率较低,界面结合为机械结合。熔铜浸渍法设备复杂,操作较难控制。电镀成形法主要存在环境污染问题、产量小、包覆厚度薄、界面结合弱等问题。连续挤压包覆技术设备投资少、生产率高、铜包覆层厚度均匀、界面结合质量好、成本低,是理想的生产工艺。本文以径向连续挤压铜和连续挤压包覆铝包钢为技术基础,通过建立连续挤压包覆模型用上限法计算了中性点位置和最佳包覆角,并在自制JL350型切向式连续挤压机上进行了单轮双槽和单轮单槽连续挤压包覆的实验研究,实验过程中自制了单轮双槽U型轮槽挤压轮、单轮单槽带凸台U型轮槽挤压轮及对应模腔及附属配套设施,并解决了如下工程化关键问题：(1)模腔的可拆换问题；(2)闷车问题及挤压轮槽结构设计；(3)堵头结构及材料选择；(4)模具结构设计；(5)钢芯与铜杆的预热及其与挤压轮转速的匹配问题；(6)该实验条件下的工艺参数整体控制。实验条件下初步实现了连续挤压包覆法生产铜包钢线材的连续化。本文对连续挤压包覆铜包钢线材工程化生产还需要解决的问题进行了分析,并对下一步实验方向、实验内容及需要改进的地方做了阐述。更多还原

【Abstract】 Copper-clad steel wire combines the mechanical properties of steel and the electrical properties of copper, Thus it has the conduction of high efficiency, low cost of materials, resisting tensile force, light weight, low wear resistance etc. It was widely used in electric power, communication, electronics, chemical engineering etc. The methods of produce copper-clad steel wire includes clad drawing method, Hot-dip coating, electroplating. Clad dressing disposal a large amount of copper, The utilization ratio of copper is low, interface with the mechanical bond, The device of hot-dip coating is complexity, the operation is difficult to control. Electroplating forming method brings the pollution of the environment, production of small, thin coating, bonding and weak issues. Continuous extrusion coating technology need less equipment investment, high productivity, uniform thickness of copper coating, bonding quality, low cost, So it is an ideal production process.This paper was based on the radial continuous extrusion copper and aluminum continuous extrusion coated technology, Through the establishment of continuous extrusion coated model,using upper-bound method and calculated the neutral position、best coated Angle. And to do continuous extrusion coated experimental research in JL350 type continuous extrusion machine which was homemade, The experiment process contains the manufacture of u-shaped trough with convex platform extrusion wheel, and the corresponding wheel cavity and affiliated facilities. This paper to solve the following main problems of industrialization:(1) The cavity of the removable problem;(2) Wheel trough structural design; (3) seal structure and material choice;(4) mould structure design;(5) Steel and copper preheated and speed matching problem with extrusion wheel;(6) The process parameters of overall control. experimentation primarily achieved continuous production.This paper also analyzed the problems of continuous extrusion coated copper clad steel wire industrialized production need to resolved, And made an exposition for the next experimental direction, experimental contents and the part which in need of improvement.更多还原