Research Creativity Award For Women and Minorities

钻杆行业最先进的是使用硬质合金杆来实现高度的刚性。但许多机械加工作业需要一个大长度的小直径孔。当前的钻杆受到这种长径比的限制，长径比为10：1或更大，导致无法忍受的颤振。制造商已尝试将被动减振装置插入棒材的工件附近的空腔中，以增加该长径比。虽然这一措施取得了有限的成功，但这一改进足以鼓励人们尝试其他减振方法。本研究项目的目的是研究如何控制钻杆上的颤振。

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.