Study of Methods to Enhance Dynamic Stability of Cantilever Tooling Structures

本项目是关于提高悬臂刀具结构动态稳定性的基础性研究，如用于机械加工的钻杆、内圆磨削心轴、铣刀等。采用复合材料结构和主结构辅助质量与耗能材料耦合的方法，提高了悬臂钻杆的阻尼和刚度。在使用细长的悬臂刀具进行加工时遇到的振动或颤动会限制金属的去除率，降低刀具寿命，并影响已加工零件的光洁度和精度。由于需要额外的二次操作才能将零件生产到所需的光洁度和精确度，制造成本增加。这一领域的进步将使制造成本降低。

This project deals with the basic study of enhancing the dynamic stability of cantilever tooling structures such as boring bars, internal grinding mandrels, and milling cutter used in machining. The damping and stiffness of cantilever boring bars are increased by using composite structures and by coupling auxiliary mass with energy dissipative material for the main structure. Vibration or chatter experienced in machining using a long, slender cantilever tooling limits the metal removal rates, reduces tool life, and effects the finish and accuracy of machined parts. Manufacturing costs are increased due to additional secondary operations required to produce the parts to the desired finish and accuracy. Advancements in this area will enable reduction in the manufacturing costs.