非球面件数控研抛力、研抛工具位置和姿态解耦技术  

Force-position-posture decoupling technique for NC polishing of aspherical part

作　　者：史永杰[1,2,3] 郑堤[1,2] 胡利永[2] 王龙山[3] 

机构地区：[1]浙江大学宁波理工学院,浙江宁波315100 [2]宁波大学机械工程与力学学院,浙江宁波315211 [3]吉林大学机械科学与工程学院,长春130022

出　　处：《吉林大学学报（工学版）》2012年第1期116-121,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(50705044)

摘　　要：为解决非球面自动研抛系统中普遍存在的研抛力-研抛工具的位置-研抛工具的姿态(以下简称力-位-姿)相互耦合问题,提出一种基于磁流变力矩伺服装置(MRT)的非球面数控研抛力-位-姿解耦技术。基于Hertz接触理论和摩擦学原理,分析研抛过程中的力-位-姿耦合机理,建立了耦合模型。阐述基于MRT的数控研抛力-位-姿解耦原理,开发相应的实验研究系统,建立系统研抛力模型。规划了研抛工具的路径。试验得到0.025μm粗糙度的镜面表面。试验表明该技术能独立、主动、实时地控制研抛过程中的研抛力、研抛工具的位置和姿态。A novel force-position-posture decoupling technique was proposed based on a magnetorheological fluid torque-servo（MRT） to solve the coupling problem in the numerical control（NC） automatic polishing system of the asphesical surface.The mechanism of the force-position-posture coupling was investigated based on Hertz contact theory and the tribological principle,and a coupling model was built.The MRT-based force-position-posture decoupling principle was studied,a corresponding polishing experiment system was developed.A polishing foree control model was established,and the path of the polishing tool was planned.Experiments were cassied out and a missos-like aspherical surface with a roughness of Ra≤0.025 μm was obtained.The results proved that using the proposed decoupling techniue,the polishing force,the tool position and posture can be controlled independently,actively and simultaneoushly during the polishing process.

关 键 词：机械制造自动化 研抛力 研抛工具位置 研抛工具姿态 磁流变力矩伺服装置 HERTZ接触理论 非球面 数控研抛 

分 类 号：TH166[机械工程—机械制造及自动化]