摘要
锥形薄壁回转件大量应用于航空航天领域,变截面锥形回转件是其中难以成形的零件之一.本文基于Simufact.Forming仿真软件,对5Cr Ni Mo18不锈钢材料强力旋压成变截面锥形薄壁回转件的过程进行仿真模拟,分析芯模转速、旋轮进给比、摩擦系数3个主要工艺参数对锥形件的壁厚均匀性的影响.使用正交试验方法设置参数组合,用极差法分析试验数据,得出影响因素的主次及较优参数组合.研究表明:当芯模转速1 200 mm·min-1,旋轮进给比1 mm·r-1,摩擦系数0.15时,壁厚极差最小.旋轮进给比对壁厚极差影响最大,随着旋轮进给比增大,壁厚极差先增大后减小;芯模转速对壁厚极差影响次之,随着芯模转速增大,壁厚极差先减小后增大.研究结果为提高旋压成形航空机匣质量提供了理论基础.
Conical parts with thin wall have been largely applied in the aerospace fields,and the discontinuous wall thickness conical part is one of them,which is difficult in spinning.Based on the Simufact-Formingsoft ware,the finite element model of the conical part with the thin wall of5CrNiMo18stainless steel is established.The influence of process parameters,including mandrel rotary velocity,feed rate of roller and friction coefficient between roller and blank,on the wall thickness deviation is analyzed.The process parameters are designed by means of the orthogonal tests,and then the data of the wall thickness deviation is analyzed.The results indicate that the optimum forming quality can be obtained under the mandrel rotary velocity being1200mm?min-1,the feed rate being1mm?r-1,and the coefficient of friction being0.15.It is found that the feed rate is the best impact factor for the thickness reduction ratio as it increases firstly followed by decreasing.Also noted is that the mandrel rotary velocity is influenced by the wall thickness,as the increasing of mandrel rotary velocity,the wall thickness decreases firstly and then increases.The findings set up a theoretical basis for the spinning of case that is applicable in aerospace industry.
作者
束学道
朱颖
SHU Xue-dao;ZHU Ying(Faculty of Mechanical Engineering & Mechanics,Ningbo University,Ningbo315211,China;Zhejiang Provincial Key Laboratory of Part Rolling Technology,Ningbo 315211,China)
出处
《宁波大学学报（理工版）》
CAS
2018年第1期8-12,共5页
Journal of Ningbo University：Natural Science and Engineering Edition
基金
国家自然科学基金(51475247)
浙江省自然科学基金重点项目(LZ17E050001)
浙江省科技计划项目(2016C31018)
关键词
锥形回转件
强力旋压
壁厚均匀性
变截面
conical part
power spinning
wall thickness deviation
discontinuous wall thickness
