摘要
为提高管电极电解加工钛合金方孔的加工稳定性和精度,建立了方孔加工间隙内电解液流动模型,分析了电极内孔形状及尺寸对加工区流场均匀性的影响规律,并进行了相关试验.结果表明:采用圆形内孔电极加工时加工区流场的分布比采用方形内孔电极加工时均匀;电极内孔横截面积越大,加工区流场的分布越均匀,加工稳定性和精度均得到提高;使用直径为2.7mm的圆形内孔电极可加工出平均加工间隙为286μm、加工间隙标准差为4.7μm、表面粗糙度为0.8μm的钛合金方孔.
In order to improve the stability and accuracy of shaped tube electrochemical drilling of square holes in titanium alloys,an electrolyte flow model was constructed for the machining gap of square holes.Then,the effects of the hollow hole shape and electrode size on the uniformity of flow fields in the machining gap were investigated.Finally,the corresponding experiments were conducted to evaluate the effects.The results show that the flow fields from the electrodes with circular hollow holes are more uniform than those from the electrodes with square hollow holes,and that the increase of the hollow hole size can improve the uniformity of flow fields as well as the machining stability and accuracy.In addition,a square hole in titanium alloys,which has a surface roughness of 0.8 μm,a machining gap of 286 μm and a machining gap standard deviation of 4.7 μm,was machined by using an electrode with a circular hollow hole of a diameter of 2.7 mm.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第9期137-142,共6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(51175258)
江苏省普通高校研究生科研创新计划项目(CXZZ11_0195)
关键词
电解加工
方孔
流场
加工稳定性
加工精度
钛合金
electrochemical machining
square hole
flow fields
machining stability
machining accuracy
titanium alloys
