检索结果-南通市图书馆

An electromagnetic semi-active dynamic vibration absorber for thin-walled workpiece vibration suppression in mirror milling

引用

Applied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1315-1334页

作者： Jianghua KONG Bei DING Wei WANG Zhixia WANG Juliang XIAO Hongyun QIU School of Mechanical Engineering Tianjin University Tianjin Key Laboratory of Nonlinear Dynamics and Control Key Laboratory of Modern Mechanisms and Equipment Design of the State Ministry of Education Tianjin University

As critical components of aircraft skins and rocket fuel storage tank shells,large thin-walled workpieces are susceptible to vibration and deformation during machining due to their weak local stiffness. To address these challenges, we propose a novel tunable electromagnetic semi-active dynamic vibration absorber(ESADVA), which integrates with a magnetic suction follower to form a followed ESADVA(follow-ESADVA)for mirror milling. This system combines a tunable magnet oscillator with a follower,enabling real-time vibration absorption and condition feedback throughout the milling process. Additionally, the device supports self-sensing and frequency adjustment by providing feedback to a linear actuator, which alters the distance between magnets. This resolves the traditional issue of being unable to directly monitor vibration at the machining point due to space constraints and tool interference. The frequency shift characteristics and vibration absorption performance are comprehensively investigated. Theoretical and experimental results demonstrate that the prototyped follow-ESADVA achieves frequency synchronization with the milling tool, resulting in a vibration suppression rate of approximately 47.57%. Moreover, the roughness of the machined surface decreases by18.95%, significantly enhancing the surface quality. The results of this work pave the way for higher-quality machined surfaces and a more stable mirror milling process.

关键词： 70J35 mirror milling O326 self-sensing semi-active dynamic vibration absorber (SADVA) thin-walled workpiece vibration absorption tuning

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Dynamic synchronous motion accuracy measurement and estimation for a five-axis mirror milling system

引用

Science China(Technological Sciences) 2023年第3期66卷 689-705页

作者： XU Kun TANG XinYu BI QingZhen YU YangBo QIAN DeHou JI YuLei State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Shanghai TOP Numerical Control Technology Co. Ltd.Shanghai 201100China

A mirror milling system(MMS)comprises two face-to-face five-axis machine tools,one for the cutting spindle and the other for the support *** it is essential to maintain the cutter and support coaxial during the cutting process,synchronous motion accuracy is the key index of the *** paper proposed a novel method for measuring and estimating the synchronous motion accuracy of the dual five-axis machine *** method simultaneously detects errors in the tool center point(TCP)and tool axis direction(TAD)during synchronous *** implement the suggested method,a measurement device,with five high-precision displacement sensors was developed.A kinematic model was then developed to estimate the synchronous motion accuracy from the displacement sensor *** screw theory was used to obtain the analytical expression of the inverse kinematic model,and the synchronous motion error was compensated and adjusted based on the inverse kinematic model of the dual five-axis machine *** and TAD quasi-static errors,such as geometric and backlash errors,were first *** adjusting the servo parameters,the dynamic TCP and TAD errors,such as gain mismatch and reversal spike,were also *** proposed method and device were tested in a large MMS,and the measured quasi-static and dynamic errors were all reduced when the compensation and adjustment method was *** Carlo simulations were also used to estimate the uncertainty of the proposed scheme.

关键词： mirror milling synchronous motion error five-axis machine tool measurement dynamic accuracy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Modeling and analysis for time-varying dynamics of thin-walled workpieces in mirror milling considering material removal

引用

Science China(Technological Sciences) 2023年第7期66卷 1883-1898页

作者： MA ShiJun XIAO JuLiang LIU HaiTao LIU SiJiang TIAN Yu Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education Tianjin UniversityTianjin 300354China

To reduce the vibration and deformation of large thin-walled workpieces during the milling process,mirror milling is widely used due to its point-to-point support and strong *** influence of the support head on the workpiece’s dynamic characteristics is crucial in determining whether the mirror milling process is reliable and ***,this study establishes a time-varying dynamic model for mirror milling of thin-walled workpieces with various boundary conditions to accurately analyze and predict the dynamic characteristics and response of the ***,a new analytical method for material removal with extensive applicability and high precision is *** this method,the Ritz mode shape is used to approximate the workpiece’s mode shape as it changes during material ***,the Hertz contact theory is adopted to establish a tool-workpiece-support head coupling model,which considers the jump-off phenomenon between ***,the dynamic model is solved using the Newmark-β numerical integration method to obtain the workpiece’s time-domain acceleration and displacement responses under the forced ***,the measured frequency response function(FRF)and vibration signals of workpieces verify the correctness of the proposed mirror milling model for thin-walled workpieces considering material *** addition,this paper analyzes the dynamic characteristics and forced vibration law of workpieces in mirror milling,which lays the foundation for high precision mirror milling.

关键词： thin-walled workpiece mirror milling dynamic model material removal machining vibration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：