TC4钛合金电火花诱导可控烧蚀复合车削技术研究  

Technical Research of Combined Machining of TC4 Titanium Alloy by EDM Induced Controllable Combustion and Turning Dressing

作　　者：陈龙海[1] 刘志东[1] 邱明波[1] 田宗军[1] 尹纯晶[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《航空学报》2013年第11期2626-2634,共9页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(51175256;51205197);航空科学基金(2011ZE52060);江苏省自然科学基金(BK2011732)

摘　　要：利用钛合金的可燃性,在电火花诱导放电和氧气助燃作用下,提出了对TC4钛合金进行放电诱导可控烧蚀并同时通过车刀对烧蚀层和软化层进行在线机械修整的新型加工方法。建立了电火花诱导可控烧蚀复合车削加工极间双介质放电模型,分析并验证了诱导烧蚀放电极间气、液两相流电介质击穿机理。对TC4钛合金进行常规电火花车削、电火花诱导可控烧蚀车削和电火花诱导可控烧蚀复合车削对比试验,并分析了复合车削的工艺特点。结果表明,电火花诱导可控烧蚀复合车削具有加工速度快、表面质量好和电极损耗低等优点。Based on the flammability of titanium alloy, a new processing method for TO4 is proposed by combining the in- duction of electrical discharge with comburent oxygen and machining. The machining principle is that the controllable com- bustion induced by electrical discharge between the workpiece and combustion inducing electrode at the same time enables the turning tool to dress the combusted and softened layer of the workpiece formed by controllable combustion on-line. It es- tablishes an inter-electrode dual dielectric discharge model of controllable combustion and turning dressing combined machi- ning, analyses the gas and liquid dual dielectric liquid discharge mechanism between the combustion inducing electrode and workpiece, and compares the new method with electrical discharge machining and controllable combustion induced by elec- trical discharge machining. The test results show that the combined machining of controllable combustion induced by electri- cal discharge machining and turning dressing has the characteristics of high processing speed, good surface quality and low electrode wear.

关 键 词：电火花 钛合金 可控烧蚀 效率 复合加工 

分 类 号：V261.61[航空宇航科学与技术—航空宇航制造工程] TG661[金属学及工艺—金属切削加工及机床]