超声辅助切削NiTi形状记忆合金有限元仿真研究  

Finite Element Simulation Study of Ultrasonic Assisted Cutting of NiTi Shape Memory Alloys

作　　者：丁小明 罗宁 庄欠玉 王桂杰 Ding Xiaoming;Luo Ning;Zhuang Qianyu;Wang Guijie(AECC Beijing Insti-tute of Aeronautical Materials,Beijing 100095,China;不详)

机构地区：[1]中国航发北京航空材料研究院,北京市100095 [2]航材国创(青岛)高铁材料研究院有限公司 [3]山东科技大学

出　　处：《工具技术》2025年第1期107-112,共6页Tool Engineering

摘　　要：将超声振动引入NiTi形状记忆合金车削加工,通过有限元仿真对超声振动引起的切削力和切屑形态变化进行研究。结果表明:超声振动使刀具运动速度和轨迹发生周期性变化,显著改变切削过程。相较于普通车削,不分离型超声辅助切削使切削力小幅增大,未能起到改善加工作用。分离型超声辅助切削中,振动幅值和频率的增大使切削力显著减小,促进切屑形成,起到提高加工效率的作用。In this paper,ultrasonic vibration is introduced into the turning process of NiTi shape memory alloy,and the cutting force and the chip morphology induced by ultrasonic vibration are studied by finite element simulation.The findings demonstrate that ultrasonic vibration leads to periodic changes in the movement speed and path of the cutting tool,which significantly changes the cutting process.In contrast to conventional turning operation,non-separation ultrasonic assisted cutting leads to a marginal increase in cutting forces,failing to enhance the machining performance.However,in separation-type ultrasonic assisted cutting,an increase in vibration amplitude and frequency markedly diminishes cutting forces and facilitates chip formation,thereby significantly improving machining efficiency.

关 键 词：超声振动车削 有限元仿真 切削力 切屑形态 

分 类 号：TG506[金属学及工艺—金属切削加工及机床] TH164[机械工程—机械制造及自动化]