空气中电火花沉积微螺旋结构的研究

Research on micro spiral structure using EDM deposition in air

为深入研究电火花沉积微型结构方法,提出了一种新的微细电火花沉积方法.对微细电火花沉积加工的基本原理进行分析,预测了其实现条件,使用通用的电火花成形加工机床,在空气介质和特定电参数下用铜电极可以沉积出微三维螺旋结构.实验得出了电参数和工作介质对微螺旋结构的影响.在只使用z轴进给的情况下,在高速钢工件表面沉积出外径为0.19 mm、线径为0.1 mm,高度为3.39 mm的19圈微螺旋结构.测试显示微螺旋材料呈明显的分层结构,具有较强的耐腐蚀性,其成分取决于工具电极材料,但电极中的Zn被氧化为ZnO.此外,在实验基础上对微螺旋结构的形成进行了初步探讨.

A new micro electrical discharge machining （EDM） deposition method is presented. The basic principles of micro EDM deposition were analyzed and the realized conditions were predicted. With special electrical parameters, the micro three-dimensional spiral structure was obtained with a brass electrode on an ordinary EDM shaping machine. Through experiments, the effects of electrical parameters and working medium on the micro spiral structure were studied. Results show that the 19-circle micro spiral structure with 0. 19 mm in external diameter, 0. 1 mm in wire diameter and 3.39 nun in height can be formed on the high-speed steel surface only using the feed of z axis. Measurements show that the micro spiral material has obvious delaminating structure and high corrosion resistance, whose components depend on the tool electrode material although Zn in the electrode is oxidized to ZnO. In addition, the forming of micro spiral structure is discussed through experiments.