【摘要】 为保证镗削加工切削稳定性,基于电流变材料设计一种智能型镗杆。该镗杆可通过调节施加于电流变材料上的电场强度来改变整个镗杆的动态特性,并借以抑制切削颤振。采用在镗杆端部激振的方法研究镗杆在不同激振频率和不同电场强度下的动态特性。实验结果表明,在不同的电场强度和振动频率下,电流变材料表现出来的振动特性差异明显,使镗杆的支撑刚度和结构阻尼特性发生显著的变化更多还原

【Abstract】 For improving the boring stability a boring bar with intelligence capacity has been designed, which contains an electrorheological(ER) fluid and is with on-line controllable dynamics. The vibration characteristics of ER fluids is dependent on applied electrical field strength. In this paper, the research focuses on the influence of the electrical field strength and the oscillating frequency to the dynamics of the boring bar based on the electrorheological effect. The experimental results show that the dynamics of the boring bar change drastically along with the electrical field strength and the oscillating frequency variation.更多还原