摘要
针对弱刚度、复杂形状的零件在切削夹紧过程中难夹持、易变形的问题,提出了基于磁流变液(MRF)的变刚度柔性辅助支承方法,以获得理想的加工质量。利用磁流变效应的快速、可逆及可控等特性,通过结构设计和磁路仿真,研制了用于薄壁曲面零件加工的磁流变自适应柔性辅助支承装置;建立了以加工形变最小为目标函数的优化模型,对该装置支承单元的数量和位置分布进行优化设计;搭建了铣削试验平台,通过对铣削信号进行测试分析,验证布局优化和励磁电流对加工质量的影响。结果表明,布局优化后的磁流变辅助支承装置随着电流的增加,可以有效地提高系统刚度,减小切削振动响应,改善加工质量。
Aiming at the problems that weak stiffness and complex shape parts are difficult to grip and easy to deform during clamping,a flexible auxiliary support method with variable stiffness based on the magnetorheological fluid(MRF)was proposed to obtain ideal machining quality.Based on the controllability,reversibility and fast response of the magnetorheological effect,a magnetorheological adaptive flexible auxiliary support device for machining the thin-walled curved parts was developed through the structural design and magnetic circuit simulation.An optimization model with minimum machining deformation as the objective function was established to optimize the quantity and position distribution of the supporting units of the device.A milling experimental platform was built.Then the effects of layout optimization and excitation current on machining quality were investigated and verified by analyzing the milling signals.The results showed that the stiffness of optimized system increased effectively and the cutting vibration response reduced with the increase of current,and the machining quality was improved.
作者
张永亮
陈向
徐裕超
王可意
张帅帅
ZHANG Yongliang;CHEN Xiang;XU Yuchao;WANG Keyi;ZHANG Shuaishuai(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《上海理工大学学报》
CAS
CSCD
北大核心
2024年第2期146-151,共6页
Journal of University of Shanghai For Science and Technology
基金
国家自然科学基金青年基金资助项目(51205255,51805328)。
关键词
磁流变效应
磁场仿真
布局优化
铣削试验
加工精度
magnetorheological effect
magnetic field simulation
layout optimization
milling test
machining accuracy
