钛合金方孔电解加工多物理场耦合研究  

A Probe into Multi-Physics Coupling in Electrochemical Machining Process of Square Holes in Titanium Alloys

作　　者：何亚峰[1,2] 卢文壮[1] 干为民[2,3] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016 [2]江苏省数字化电化学加工重点实验室,江苏常州213002 [3]常州工学院机械与车辆工程学院,江苏常州213002

出　　处：《华南理工大学学报（自然科学版）》2016年第5期110-116,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51275230);江苏省科技支撑计划(工业)项目(BE2014051);常州市应用基础研究计划项目(CJ20140046)~~

摘　　要：为进一步提高电解加工的质量和精度,以钛合金方孔电解加工为对象,充分考虑了电解加工中电场、流场和温度场的相互影响关系,建立了钛合金方孔电解加工多物理场耦合模型,通过数值计算得到了多物理场耦合电解加工电位、深度、流速、气泡率和温度梯度的分布,探讨了各物理量随加工时间的变化规律,并开展了钛合金方孔电解加工试验,研究了不同的电解液入口压力对加工质量的影响规律.试验结果表明:电解加工是电场、流场和温度场相互耦合的过程;相同条件下不同加工时间的方孔轮廓实测值与理论计算值吻合得较好;随着加工时间的递增,加工的深度和锥角在变大,加工区域的流速降低、气泡率增加和温度梯度增大.In order to further improve the quality and precision of electrochemical machining,by taking the machining of square roles in titanium alloys as the research object,firstly,a multi-physics coupling mathematical model describing the electrochemical machining of square holes is established,which fully takes into consideration the mutual relationship among electric field,flow field and temperature field. Secondly,the distributions of square role＇s multi-physics coupling electrochemical machining potential,machining depth,flow velocity,bubble ratio and temperature gradient are obtained via numerical simulations. Then,the variations different physical parameters with time are discussed. Finally,electrochemical machining experiments of square holes in titanium alloys are carried out,and the influence of electrolyte inlet pressure on processing quality is investigated. The results show that（ 1） electrochemical machining is an interaction process of electric field,flow field and temperature field;（ 2） the measured square role contour accords well with the theoretically-calculated one; and（ 3） with the increase of processing time,the machining depth and cone angle become larger,the flow rate in the processing area decreases,while the bubble rate as well as the temperate gradient increases.

关 键 词：电解加工 方孔 钛合金 多物理场耦合 气液两相流 

分 类 号：V261.5[航空宇航科学与技术—航空宇航制造工程]