【摘要】 为了解气体介质中电火花铣削加工的加工性能,首先采用单因素法在空气介质中进行了电火花铣削加工工艺实验研究。其次,采用了两种电极损耗补偿方法对三维结构的工件进行了实验研究。研究结果表明工件的加工速度随着分层厚度的增加而增加,随着轨迹重叠率的增加而减小;存在一个较佳的主轴伺服进给速度使得工件的加工速度较高。此外,气体介质中电火花加工工具电极损耗低的特点有利于实现气中电火花削加工工具电极损耗的补偿。利用回参考点的方法实现了三维结构的气中电火花铣削加工,加工出上边为8 mm×8 mm、四壁倾斜30°的梯形型腔和直径为2 mm的凸球。更多还原

【Abstract】 In order to know the machining performances of electrical discharge machining milling in gas(dry ED-Milling),experimental researches on electrical discharge machining milling(ED-Milling) in air were carried out with a single factor method.Two tool electrode wear compensation methods were used to process 3-D structures by dry ED-Milling.Experimental results show that the material remove rate(MRR) increases with the increase of laminated depth and decreases with the increase of tool path overlap ratio.There is an optimal spindle servo feeding speed(SFS) at which the MRR is the highest.In addition,the feature of low electrode wear ratio of the electrical discharge machining in gas(dry EDM) is helpful to implement the tool electrode wear compensation in dry ED-Milling.3-D samples were machined by returning conference points,one of which is a sphere,whose diameter is 2 mm,located in a column cavity,the other of which is a trapezoid cavity,whose upper sides are 8 mm×8 mm and its cavity walls with the slope of 30°.更多还原