摘要
鉴于碳纤维增强树脂基复合材料(CFRP)的高铁构件上安装孔的制造质量差和加工效率低等问题,提出一种纵扭复合超声螺旋铣孔的加工工艺;基于运动合成原理,获得了刀尖点与端刃的空间运动轨迹,分析了纵扭复合超声螺旋铣削的椭圆振动加工特点;基于传输矩阵法及螺旋槽模态转换原理,推导了带刀具悬链过渡复合变幅杆的频率方程,实现了超声加工系统的纵扭复合振动,其间利用Ansys软件对设计的超声加工系统进行有限元计算,获得了不同结构参数对加工系统频率及扭纵振幅比的影响规律;对研制的超声加工系统进行切削性能测试,获得了较好的加工效果。
In view of poor quality and low processing efficiency of the installation holes on the Carbon Fiber Reinforced Polymer(CFRP)composite parts of high-speed rail,a new machining process of longitudinal-torsional compound ultrasonic helical milling hole is put forward.Firstly,based on the principal of motion synthesis,the space motion track of tool nose and end edge was obtained,and the elliptical vibration machining characteristics of longitudinal-torsional compound ultrasonic helical milling were analyzed.Then,based on the transfer matrix method and the modal transformation principal of helical groove,the frequency equation of catenary transition compound horn with milling cutter was derived,and the longitudinal-torsional compound vibration of ultrasonic machining system was realized.Meanwhile,the finite element analysis(FEA)of the ultrasonic machining system was carried out by using Ansys software,and the influence law of the structural parameters on the frequency and amplitude ratio of the machining system was obtained.At last,the machining performance of the developed ultrasonic machining system is tested,and better machining results are obtained.
作者
唐军
李文星
赵波
TANG Jun;LI Wenxing;ZHAO Bo(Department of Mechanical and Electrical Engineering,Xinxiang University,Xinxiang Henan 453003,China;School of Mechanical and Power Engineering,Henan Polytechnic University,Jiaozuo Henan 454000,China)
出处
《机床与液压》
北大核心
2019年第13期22-28,共7页
Machine Tool & Hydraulics
基金
河南省高等学校重点科研项目(18A460029)
国家“863”计划资助项目(2013AA040103)
