Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (9): 137-142.doi: 10.3969/j.issn.1000-565X.2013.09.023

• Mechanical Engineering • Previous Articles     Next Articles

Effects of Hollow Hole Structure of Electrode on Electrochemical Machining of Square Holes in Titanium Alloys

Fang Xiao- long Qu Ning- song Li Han- song Zhu Di   

  1. College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,China
  • Received:2013-04-15 Revised:2013-05-23 Online:2013-09-25 Published:2013-08-01
  • Contact: 曲宁松(1968-)，男，博士，教授，博士生导师，主要从事精密微细电解加工技术研究． E-mail:nsqu@nuaa.edu.cn
  • About author:房晓龙(1987-)，男，博士生，主要从事管电极电解加工技术研究．E-mail:xlfang@nuaa．edu．cn
  • Supported by:

    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)

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Abstract:

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 286μm and a machining gap standard deviation of 4.7μm,was machined by using an electrode with a circular hollow hole of a diameter of 2.7mm.

Key words: electrochemical machining, square hole, flow fields, machining stability, machining accuracy, titaniumalloys

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