基于磁流变液辅助支撑的弱刚度零件铣削加工研究  

RESEARCH ON MILLING OF WEAK STIFFNESS PARTS BASED ON MAGNETORHEOLOGICAL FLUID AUXILIARY SUPPORT

作　　者：张永亮[1] 王可意 张帅帅 ZHANG YongLiang;WANG KeYi;ZHANG ShuaiShuai(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学机械工程学院,上海200093

出　　处：《机械强度》2022年第5期1057-1063,共7页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51205255)资助。

摘　　要：设计了一套基于磁流变液特性的自适应式柔性辅助支承装置,可用于提高复杂曲面弱刚度零件的加工精度,通过Comsol利用有限元法进行装置磁场仿真,确定其磁场强度大小,建立基于磁流变效应的弱刚度工件铣削加工与夹具系统装夹定位模型,对辅助支撑作用下的定位约束模型进行分析,计算静态下工件变形量,研究装置对工件加工质量的影响。搭建基于磁流变辅助支承铣削加工试验平台,在不同电流参数的条件下进行弱刚度零件铣削加工,使用Labview平台采集系统对切削信号数据进行采集分析,并测量铣削加工表面粗糙度,结果表明,磁流变辅助支承作用下,弱刚度工件表面相较于无支撑状态振动幅度相应降低了46.9%~75.7%,表面粗糙度约降低69.89%~80.61%。According to the characteristics of the magnetorheological fluid, in this thesis, there are designs of a set of adaptive, flexible auxiliary supporting device units, which can be used to develop the processing accuracy of complex curved parts with weak rigidity. The magnetic field of the device is simulated by comsol using finite elements to determine its magnetic strength. It establishes the milling and positioning models of the workpieces with weak stiffness based on the magnetorheological effect, analyzing the positioning constraint models under the auxiliary support, calculating the deformation of the work pieces under static state, studying the influence of the device on the quality of the workpieces. It set up a milling test platform based on magnetorheological auxiliary support, milling parts with weak stiffness under the conditions of different current parameters, collecting acceleration signals for analysis by labview platform data acquisition system, measuring the surface roughness of the milling process. The results agree that, under the action of the magnetorheological auxiliary support, in comparison with the unsupported state, the vibration amplitude is reduced 46.9% to 75.7%, and the surface roughness of the workpieces with weak rigidity is about 69.89% to 80.61% lower.

关 键 词：磁流变效应 磁场仿真 夹具系统 铣削试验 加工精度 

分 类 号：TB535[理学—物理] TH161.14[理学—声学]