刀尖圆弧半径对车削颤振稳定性影响分析  

Analysis of The Influence of Corner Radius on the Stability of Turning Chatter

作　　者：王明海 葛鹏程 崔林琳 郑耀辉 WANG Ming-hai;GE Peng-cheng;CUI Lin-lin;ZHENG Yao-hui(School of Mechatronics Engineering,Shenyang Aerospace University,Shenyang 110136,China;Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Shenyang 110136,China;Shenyang Base,Engineering and Technology Branch,China Southern Airlines Co.,Ltd.,Shenyang 110000,China)

机构地区：[1]沈阳航空航天大学机电工程学院,沈阳110136 [2]沈阳航空航天大学航空制造工艺数字化国防重点学科实验室,沈阳110136 [3]中国南方航空股份有限公司工程技术分公司沈阳基地附件修理部,沈阳110000

出　　处：《组合机床与自动化加工技术》2022年第10期46-49,54,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家科技重大专项项目(2019ZX04014);辽宁省教育厅项目(JYT2020003)。

摘　　要：薄壁环形工件具有尺寸大、壁厚薄、刚度低的特点,为避免车削加工时发生再生颤振影响加工精度,首先,基于工件特点建立外圆车削动力学模型并进行稳定性极限分析,通过试验获取7075铝合金薄壁件模态参数与不同刀尖圆弧半径下的车削力参数,运用数值仿真绘制出稳定性叶瓣图,对工件车削稳定性预测;其次,运用MATLAB/Simulink模块进行时域仿真,结合稳定性叶瓣图探究刀尖圆弧半径对车削稳定性的影响,验证预测的准确性。结果表明,选择稳定区域的车削参数可以有效避免车削颤振,选择较小的刀尖圆弧半径时工件的车削稳定性好,加工效率高。该项研究为铝合金薄壁环形工件车削切削参数与刀具参数的选择提供依据。Thin-walled annular workpieces have the characteristics of large size,thin wall thickness and low rigidity.In order to avoid regenerative chatter vibration during turning and affecting the machining accuracy,firstly,based on the characteristics of workpiece cylindrical turning dynamics model is established and the stability limit analysis,through the test for 7075 aluminum alloy thin-walled modal parameters and the cutting force under different point arc radius parameters,mapped the stability lobes diagram,using the numerical simulation for predicting the stability of turning workpiece;Secondly,MATLAB/Simulink module was used for time domain simulation,and the influence of corner radius on turning stability was explored in combination with stability lobe diagram to verify the accuracy of prediction.The results show that selecting the turning parameters in the stable region can effectively avoid the turning chatter,and the turning stability of the workpiece is good and the machining efficiency is high when the smaller radius of the tool nose arc is selected.This study provides a basis for the selection of cutting parameters and tool parameters in aluminum alloy thin-wall annular workpiece turning.

关 键 词：薄壁环形工件 车削颤振 刀尖圆弧半径 数值仿真 

分 类 号：TH161[机械工程—机械制造及自动化] TG51[金属学及工艺—金属切削加工及机床]