非球面数控气囊研抛力/位解耦控制  

Force-position Decoupling Control for NC Bonnet Polishing of Aspherical Part

作　　者：胡利永[1,2] 郑堤[1,2] 詹建明[2] 应仙根 

机构地区：[1]浙江大学宁波理工学院,宁波315100 [2]宁波大学,宁波315211

出　　处：《机械科学与技术》2014年第11期1677-1681,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(50705044);浙江省自然科学基金项目(LY12E05007);宁波市自然科学基金项目(2011A610130)资助

摘　　要：针对非球面研抛过程中的力/位耦合问题,本文通过磁流变液力矩伺服控制装置进行力的控制,由数控车床完成位置及速度等工艺参数的控制,实现了力/位解耦,从而提高了研抛的精度。根据Preston研抛控制机理,建立了力控制的实现模型,在确定了研抛过程的工艺参数后,进行了研抛实验研究。通过计算椭球面研抛过程的驻留时间,进而确定了不同位置的时间与研抛力的对应关系,通过控制磁流变液力矩伺服装置的电流输出得到相应的研抛控制力,使其与数控机床给定的进给速度及位置进行匹配。实验结果表明:通过驻留时间进行力控制的方法可以实现高效率研抛加工中力的控制。To solve the problem of the force /position coupling on aspheric surface polishing process,a kind of model was built to improve the polishing precision using the magnetorheological fluid torque servo control device to control the force,when the position and speed were controlled by the numerical lathe. According to the Preston polishing control principle, a force control implementation model was established. Based on the polishing parameter,the polishing experiment was done. By calculating the swell time of the ellipsoid surface polishing,the relation of the polishing time and polishing force was built. Through controlling the output of current of magnetorheological liquid servo device to get the corresponding polishing control force to match the position and speed given by NC machine tool. The experimental results show that the proposed force /position control method can achieve high precision polishing.

关 键 词：非球面 气囊 研抛 磁流变液力矩伺服控制 

分 类 号：TG156[金属学及工艺—热处理]