摘要
高强度、高硬度弹性材料3J21微小方孔是航空、仪器仪表、模具等行业中常用的结构且加工困难。分析了难加工金属材料微小结构常用的加工方法,阐述了微细电解铣削加工的原理和实验系统,在研究微细圆柱电极在线制备基础上,利用回形单一加工、折线粗加工结合回形精加工2种方案进行了难加工材料3J21微小方孔的微细电解分层铣削加工研究,加工得到具有较高精度的微小方孔。研究表明,直流电源折线粗加工结合纳秒脉冲电源回形精加工方法所加工的微小方孔菱角分明、结构规整,具有较高的加工精度和表面质量,且无加工变质层和残余应力,是实现高弹性材料3J21微小结构加工成形的一种理想方法。
Micro square holes of elastic material 3J21 with high hardness and strength are often used in the industries of aviation,instrument and mould,and are difficult to machining. In this paper,common machining methods to machine difficult-to-cut material parts are firstly analyzed. The principle and set-up of micro electrochemical milling machining are elaborated. A typical machining method for micro electrodes is studied and then two micro electrochemical milling processes( simple ring-shaped milling,and zigzag rough milling and fine contour milling) are applied to machine micro square holes of 3J21. Finally micro square holes with good quality are achieved. Experiment results show that the process of zigzag rough machining with direct-current power supply and fine contour milling with nanosecond-pulse power supply is highly effective to machine micro square holes of 3J21. With this process,the machined micro square holes are of excellent edge-and-ankle shape,with high precision and good surface roughness,and without metamorphic layer and residual stress.
出处
《制造技术与机床》
北大核心
2015年第3期101-104,共4页
Manufacturing Technology & Machine Tool
基金
"十二五"兵器预研支撑基金项目(6220107××××)
陕西省自然科学基金项目(2014JM2-5072)
陕西省教育厅项目(2013JK1013
13JS043)
陕西省特种加工重点实验开放基金项目(ST-11004)
关键词
弹性材料
微细电解铣削加工
微小方孔
加工精度
elastic material
micro electrochemical milling machining
micro square hole
machining precision
