磁性剪切增稠抛光材料去除特性与预测模型  

Material Removal Characteristics and Predictive Models for Magnetorheological Shear Thickening Polishing Method

作　　者：田业冰 马振 钱乘 AHMAD S 马锡峰 苑祥昱 范增华[1] TIAN Yebing;MA Zhen;QIAN Cheng;AHMAD S;MA Xifeng;YUAN Xiangyu;FAN Zenghua(School of Mechanical Engineering,Shandong University of Technology,Zibo 255049)

机构地区：[1]山东理工大学机械工程学院,淄博255049

出　　处：《机械工程学报》2024年第23期365-376,共12页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51875329);山东省泰山学者工程专项(tsqn201812064);山东省自然科学基金(ZR2023ME112);山东省重点研发(2018GGX103008);山东省高等学校青创科技(2019KJB030);山东省高新技术中小企业创新能力提升计划(2022TSGC1333、2022TSGC1261)资助项目。

摘　　要：磁性剪切增稠抛光(Magnetorheological shear thickening polishing,MRSTP)是一种结合了剪切增稠和磁化增强双重刺激响应的新型多场复合抛光方法,能够满足难加工材料的高效精密抛光,但是MRSTP的微观材料去除与抛光介质流变学性能的关系尚不明确。利用磁流体力学、非牛顿流体运动学和微观接触力学,将单颗磨粒的材料去除模型与活性磨料的统计模型相结合,建立了MRSTP的材料去除预测模型。分析了抛光介质的流变特性,研究了加工参数对工件表面所受流体压力的影响规律,深入探究了磁场与应力场之间的耦合作用,揭示了MRSTP的材料去除机制。利用MRSTP方法在Ti-6Al-4V工件表面上获得了2.7μm/h的最大材料去除率(Materialremovalrate,MRR),MRR理论值与实验值的相对误差为18.95%,验证了材料去除预测模型的有效性,结果表明,MRSTP方法在实现难加工材料的高效加工方面具有巨大的潜力。Magnetorheological shear thickening polishing(MRSTP)is a novel multi-field hybrid polishing method combined dual stimulus responses of shear thickening and magnetisation enhancement,which can achieve efficient and precise polishing for difficult-to-machine materials.However,the relationship between the microscopic material removal behaviours of the MRSTP and the rheological characteristics of the polishing media remain unclear.A predictive material removal model is established with the approaches of magnetorheological fluid dynamics,non-Newtonian fluid kinematics,and microscale contact mechanics,based on integration the single-grit material removal model with the statistical model of active abrasives.The rheological properties of the polishing media are analysed.The law of the influence of processing parameters on the fluid pressure applied to the workpiece surface is investigated.The coupling effects between the magnetic field and the stress field are deeply explored to reveal the material removal mechanism of MRSTP.A maximum material removal rate(MRR)of 2.7μm/h is obtained on the Ti-6Al-4V workpiece surface.The relative error between the theoretical and experimental MRR is 18.95%,verifying the validity of the MRR model.The results show that the MRSTP method is great potential for achieving efficient processing for difficult-to-machine materials.

关 键 词：磁性剪切增稠抛光 材料去除机理 预测模型 流体动力学 TI-6AL-4V 

分 类 号：TG73[金属学及工艺—刀具与模具]