摘要
为减小钛合金薄壁件切削加工过程中的变形,提出了一种新型的非均匀余量设计策略。建立了基于Rayleigh-Ritz法的薄壁件铣削加工变形预测数学模型,提出了离散化的余量体积单元设计思路并完成了工件的非均匀余量设计,最后对比分析了不同余量设计策略对薄壁悬臂结构件加工变形的影响。研究结果表明:所提出的基于Rayleigh-Ritz法的离散余量体积单元非均匀余量设计策略对工件自身刚度利用率高,表面加工误差分布一致性好,且对控制最大表面加工误差具有更优的效果。
A new design strategy of non-uniform allowance was presented to reduce the deformations of thin-walled titanium alloy parts in cutting processes.A mathematical model for predicting milling deformations of thin-walled parts was established based on Rayleigh-Ritz method.A design idea was put forward based on discretized volume elements of machining allowances and the non-uniform allowance design of workpieces was completed.Finally,the effects of different allowance design strategies on the milling deformations of thin-walled cantilever structure parts were analyzed and compared.The results show that the proposed non-uniform allowance design strategy of discrete allowance volume elements based on Rayleigh-Ritz solution has high utilization rate of the stiffness of workpiece itself and good consistency in distribution of surface machining errors,and it also has better effects to control the maximum surface machining errors.
作者
李曦
袁军堂
汪振华
章波
LI Xi;YUAN Juntang;WANG Zhenhua;ZHANG Bo(School of Mechanical Engineering, Nanjing University of Science and Technology,Nanjing,210094)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2020年第11期1378-1385,共8页
China Mechanical Engineering
基金
国家自然科学基金资助项目(51675285)。
作者简介
李曦,男,1995年生,硕士研究生,研究方向为钛合金薄壁件切削加工及其变形控制,E-mail:10339331646@qq.com;通讯作者:袁军堂,男,1962年生,教授、博士研究生导师,研究方向为先进制造工艺与装备复杂薄壁构件精密加工技术,E-mail:mc106@mail.njust.edu.cn。
