考虑工件变形的五轴侧铣薄壁件铣削力建模  

Milling Force Modeling of Thin-walled Parts with 5-Axis Flank Milling Considering Workpiece Deformation

作　　者：卫星驰 赵嫚 杨青平 曹珍珍 茅健 WEI Xingchi;ZHAO Man;YANG Qingping;CAO Zhenzhen;MAO Jian(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620;Chengdu Useful Technology Co.,Ltd.,Chengdu 610511)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201620 [2]成都永峰科技有限公司,成都610511

出　　处：《机械工程学报》2022年第7期317-324,共8页Journal of Mechanical Engineering

基　　金：上海市浦江人才计划资助项目(20PJ1404700)。

摘　　要：针对铣削加工过程中工件和刀具接触关系的时变性所导致铣削力预测不精准的问题,提出一种综合考虑工件变形作用下的五轴侧铣铣削力建模方法。首先,基于机械Ⅱ型力学模型,综合考虑剪切力和犁切力作用,建立五轴铣削加工微元铣削力模型;其次,利用欧拉-伯努利梁理论计算工件在任意切削深度下的变形量;进而,更新工件变形量引起的切削深度变化,构建考虑工件变形的五轴侧铣薄壁件铣削力模型;最后,通过试验与模型预测结果对比,得出在考虑变形的情况下,X、Y方向上铣削力的平均峰值误差分别减小了4.42%和0.62%,验证了模型的有效性。Aiming at the problem that the time-varying nature of the contact relationship between workpiece and tool during machining can lead to inaccurate modeling of milling forces, a modeling method of five-axis flank milling forces under workpiece deformation is proposed. Firstly, based on the mechanical model of mechanical type II, the milling force model of micro-element is established by integrating the effects of shear force and plow cutting force. Secondly, the deformation of the workpiece at any depth of cut is calculated based on the Euler-Bernoulli beam theory. Then, the workpiece deformation is introduced into the modeling process and the covariates in the model are updated to establish a milling force model for thin-walled parts with five-axis flank milling considering the workpiece deformation. Finally, by comparing the experimental and model prediction results, it is concluded that the average peak errors of milling forces in X and Y directions are reduced by 4.42% and 0.62%, respectively, considering the deformation,which verified the validity of the model.

关 键 词：铣削力建模 工件变形 五轴侧铣 薄壁件 

分 类 号：TH161[机械工程—机械制造及自动化]