Abstract
This report proves that, by the result of analyzing the axial vibration drilling mechanism, the pulsating drilling force under the conditions of 2a>s/2, where a is amplitude, s is feed, and the other drilling force shown by the equation H (t) -Hmean+h sin ωt of 2a<s/2, have been acted on the drill point. Through the analysis of the dynamical behavior on the drill point under each condition, it is analyzed that the former proves the rigidity effect and the stillness effect for the latter. In experiment the actual drilling force can be measured by use of the drill dynamometer with high accuracy and high insensitivity having about 80 kHz in natural frequency and 5% in interference ratio divided in two forces. This obtained force can be equal to one analyzed. Thus, this result proves adequateness of the analyzed force and the theoretical basis of high accuracy drilling with the axial vibration drilling. And it is also found that the drilling accuracy becomes even more higher to apply the rigidity effect positively.
