Dynamic Modeling of Composite Boring Bars Considering Different Boundary Conditions

2018 International Conference on Advanced Materials, Intelligent Manufacturing and Automation

材料科学;机械制造;运输工程

Ren, Yongsheng^1 ; Feng, Wenliang^1 ; Ma, Bole^1

School of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao

266590, China^1

关键词: Different boundary condition;    Dynamic characteristics;    Dynamic stiffness;    Euler Bernoulli beam theory;    Frequency equation;    Numerical calculation;    Spring stiffness;    Supporting conditions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/382/3/032026/pdf
DOI  :  10.1088/1757-899X/382/3/032026

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Boring bar for deep hole cutting is often more prone to flutter problems. The traditional boring bar is generally made of metal material. There is a close relationship between the dynamic characteristics of the boring bar and the tightness of the fixed end. In this paper, based on Euler-Bernoulli beam theory, the distributed parametric differential equations of composite boring bar are prensented. The dynamic characteristics of composite boring bar with three different conditions including fixed-free, pinned-pinned-free and spring-spring-free are investigated. The corresponding frequency equations are given. The natural frequency and dynamic stiffness of the composite boring bar are obtained by numerical calculation. The influences of the supporting conditions and the ply angle are studied. The results show that the supporting conditions, layer angle, support spring stiffness and support spacing have an important effect on the dynamic characteristics of the composite boring bar.