摘要
针对钼钛锆这一耐高温材料在航天动力系统中的特殊加工需求,开展了电火花加工钼钛锆合金的工艺特性研究。采用DOE的方法,设计了25-1析因试验对放电参数进行筛选,得到对加工效果有显著影响的3个参数;在此基础上设计了响应曲面试验,探讨了包括脉宽、占空比和峰值电流等放电参数对材料去除率和电极相对损耗率的影响,并且拟合得到了材料去除率和相对电极损耗率的推荐公式和响应曲面图。通过分析试验结果表明:(1)材料去除率受峰值电流变化的影响最明显,并且脉宽与占空比呈现一定的交互关系;(2)电极相对损耗率受峰值电流变化影响不明显,受脉宽和占空比变化影响大,而且两者呈现一定的交互关系。
In order to study the processing property of EDM for TZM, a 25-1 fractional factorial experiment was designed to screen out the significant discharge parameter which influence the experiment results. A response surface experiment was conducted to explore the machining TZM by EDM under different pulse durations, duty cycles and peak currents, and fitting the empirical formula of material removal rate（MRR） and tool wear ratio（TWR） through experiment. The experimental results show that：（1）MRR affected by the peak current is the most obvious, and the pulse width and duty cycle are showed some interactions;（2）TWR affected by the pulse width and duty cycle is obvious, but not the peak current, and the pulse width and duty cycle are showed some interactions.
出处
《航空制造技术》
2016年第14期61-64,68,共5页
Aeronautical Manufacturing Technology
基金
上海航天技术研究院-上海交大航天先进技术联合研究中心资助项目(BXD1423700)
