Finite Element Analysis on Natural Properties of a Micro Drill with Ultrasonic Vibration

摘要

Finite element analysis on natural properties of a micro drill with ultrasonic vibration is considered to study. Because getting smaller aperture in the printed circuit board (PCB), it tends to be more severe due to vibration. The vibration has adverse effects to machining accuracy and surface roughness which will increase tool abrasion and further accelerate the destruction from material fatigue. There are many ways to produce perforations, such as laser micro-machining and micro-drilling. The industry still adopts micro drill piercing process due to the cost and technical considerations. In order to enhance the cutlery life and the quality of the drilling process, the cutting characteristic of bur is important. Hence, the vibration during drilling must be suppressed. This study is to investigate the natural properties of a micro drill under ultrasonic vibration (50 kHz) excited with a piezoelectric-driven actuator and numerically by using finite element analysis.