Experimental Research on Low Frequency Vibration-Assisted Hole Making of Ti/Al Stacked Structure
YANG Haojun1,2, CHEN Yan1,2, XU Jiuhua1,2, ZHANG Yongsheng1,2
( 1.Nanjing University of Aeronautics and Astronautics, Nanjing 210016,China;
2. Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology, Nanjing 210016,China)
Abstract：There are still some problems in assembly holes making of the titanium and aluminum stacks (Ti/Al
stacks), such as the poor holes surface quality and out-of-tolerance diameter. In this article, low frequency vibration-assisted
boring and reaming of Ti/Al stacks were investigatedin compared with the traditional ones.Both chip morphology and processing
quality were analyzed. It was found that distinctive mechanical damage of the Aluminum holes surface could be
significantly reduced due to the improved extraction of the small chip segments.After one operation of boring and reaming
with low frequency vibration assisted processing, The average surface roughness of both titanium and aluminum can reach
R a0.6μm. The hole diameter can meet a tolerance of H7 and the burr height on exit side can be reduced below 200μm.
2017, 
