多轴联动龙门式加工中心主体结构有限元分析  

Finite Element Analysis of Multi-axis Synchronous Gantry Machining Center Main Structure

作　　者：佀国宁[1] 余跃庆[1] 杨建新[1] 

机构地区：[1]北京工业大学机电学院,北京100124

出　　处：《组合机床与自动化加工技术》2009年第9期87-91,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家科技支撑计划资助项目(2007BAF21B01);北京工业大学博士创新基金(bcx-2009-005)

摘　　要：采用有限元软件SAMCEF Mecano,建立了多轴联动龙门式加工中心主体结构的仿真模型,基于结合面特性参数数据库,采用用户自定义矩阵来处理机床结合部的接触问题,对加工中心进行了静、动态特性分析,得出了加工中心的静刚度、模态振型、动刚度。找出了机床的薄弱环节。通过建立动态的有限元模型,对加工中心进行了动力学分析,得出不同时刻应力变化云图。验证了静、动态特性分析的正确性。这些内容为进一步的研究加工中心的动态特性、结构优化设计以及轻量化设计提供了重要依据。The finite element model of multi-axis synchronous gantry machining center main structure is a- dopted with a finite element analysis software SAMCEF Mecano. Based on the characteristic parameter data- base of joint surfaces, the contact problem of joint surfaces of machine tool is handled with user-defined matrix element. The static, dynamic analysis is developed on the machining center and the stiffness, the mode shapes and the dynamic stiffness are identified. The weak segment of machine tool was found. The dynamic analysis is carried out with dynamic I＇mite element model, and the equivalent stress diagram is obtained. The static and dynamic analysis is proved to be correct. The results provide necessary information for the dynamic character- istics of machining center, the whole structure optimal design and the lightweight design.

关 键 词：龙门式加工中心 有限元 静态特性 动态特性 动力学 

分 类 号：TH122[机械工程—机械设计及理论]