Drilling assisted by axial vibration at low frequency is a promising machining process because, by naturally fragmenting chips, it can improve both productivity by canceling stripping operations and work piece quality by decreasing negative effects due to chip friction. Based on a theory of self-excited vibrations, a drilling device has been developed which is described in this paper. This technology is very compact and can used on any conventional machine tool. However the experiments on these machine tools are quite difficult and long because the numerous parameters influencing the vibration. Therefore, in order to guide the experiments, a dimensionless approach has been used to choose the cutting conditions and vibratory tool holder properties. This approach permits the number of test to be reduced, since the machining process entirely can be described with only three dimensionless parameters instead of nine physical parameters. This paper presents first experimental results on this new technology. In addition, it shows the way that the dimensionless approach had been applied and validated to guide the experiments.
To download presentation u can go through this link
http://www.easy-share.com/1910064873/SELF-EXCITED VIBRATORY DRILLING.ppt
No comments:
Post a Comment