Elliptical vibration cutting of large-size thin-walled curved surface parts of pure iron by using diamond tool with active cutting edge shift  

作　　者：Zhenhua JIAO Renke KANG Dongxing DU Jiang GUO 

机构地区：[1]Key Laboratory for Precision and Non-traditional Machining of Ministry of Education,Dalian University of Technology,Dalian 116024,China [2]Institute of Mechanical Manufacturing Technology,China Academy of Engineering Physics,Mianyang 621999,China

出　　处：《Chinese Journal of Aeronautics》2023年第6期402-419,共18页中国航空学报（英文版）

基　　金：the financial support from Science Challenge Project(No.TZ2016006-0103-01);National Natural Science Foundation of China(No.51975096 and No.51805498).

摘　　要：Large-size thin-walled curved surface parts of pure iron are crucial in aerospace,national defense,energy and precision physical experiments.However,the high machining accuracy and surface quality are difficult to achieve due to the serious tool wear and deformation when machining the parts with conventional cutting tools.In this paper,an elliptical vibration cutting(EVC)with active cutting edge shift(ACES)based on a long arbor vibration device is proposed for ultraprecision machining the pure iron parts by using diamond tool.Compared with cutting at a fixed cutting edge,the influence of ACES on the EVC was analyzed.Experiments in EVC of pure iron with ACES were conducted.The evolutions of the surface roughness,surface topography,and chip morphology with tool wear in EVC with ACES are revealed.The reasonable parameters of ultraprecision machining the pure iron parts by EVC with ACES were determined.It shows that the ACES has a slight influence on the machined surface roughness and surface topography.The diamond tool life can be significantly prolonged in EVC of pure iron with ACES than that with a fixed cutting edge,so that high profile accuracy and surface quality could be obtained even at higher nominal cutting speed.A typical thin-walled curved surface pure iron part with diameter φ240 mm,height 122 mm,and wall thickness 2 mm was fabricated by the presented method,and its profile error and surface roughness achieved PV 2.2μm and Ra less than 50 nm,respectively.

关 键 词：Curved surface Diamond tool Elliptical vibration cutting Pure iron Thin-walled parts 

分 类 号：TG506[金属学及工艺—金属切削加工及机床]