Research Creativity Award For Women and Minorities

镗杆行业的最新技术是使用 硬质合金棒以实现高刚度。但许多 机械加工作业需要大长度的小直径孔。 目前的镗杆受到这种长径比的限制 10比1或更大的比率导致不能忍受的颤动。 制造商已经尝试插入被动阻尼 设备进入一个腔附近的工件的酒吧，以增加 这个长度直径比。虽然这一举措遭到 有限的成功，改进是足够的鼓励尝试 其他阻尼方法。 %%% 本研究项目的目的是调查 控制镗杆上的颤振的问题。

The state-of-the-art in the boring bar industry is to use carbide bars to achieve a high degree of stiffness. But many machining jobs call for a small diameter hole of great length. Current boring bars are limited by this length-to-diameter ratio with ratios of 10 to 1 or greater resulting in intolerable chatter. Attempts have been made by manufacturers to insert passive damping devices into a cavity near the workpiece of the bar to increase this length-to-diameter ratio. Although this measure has met with limited success, the improvement is sufficiently encouraging to try other damping methods. %%% The purpose of this research project is to investigate the problem of controlling chatter on a boring bar.