B-550E高速精雕机静动态特性分析

Analysis of Static and Dynamic Characteristics of B-550E High-Speed Engraving Machine

以B-550E高速精雕机为研究对象,在ANSYS Workbench软件中建立其整机有限元模型,并对其进行静动态特性分析。通过分析机床在仅受重力以及重力与铣削力共同作用下的整机静态特性,找出机床结构系统静刚度的薄弱环节。通过模态分析得到整机的前6阶固有频率及主振型,在此基础上,对整机进行谐响应分析,获得整机在铣削力激励作用下各方向的幅频特性曲线。结果表明:前2阶固有频率对机床的动态性能影响较大;整机的最大变形及应力均发生在主轴箱,且前2阶固有频率的主振型均为主轴箱部件,因此影响机床动态性能的关键部件是主轴箱。

Taking the B-550E high-speed engraving machine as the research object,the finite element model of the whole machine was established in ANSYS Workbench software,and the static and dynamic characteristics were analyzed.The static characteristics of the machine under gravity and the combined action of gravity and milling force were analyzed,and the weak links of the static stiffness of the machine tool structure system were found.Through modal analysis,the first 6 natural frequency and main mode shape of the whole machine were obtained,and on this basis,the harmonic response analysis of the whole machine was carried out,and the amplitude-frequency characteristic curves of the whole machine in all directions under the excitation of milling force were obtained.The results show that the first 2 order natural frequencies have a great influence on the dynamic performance of the machine tool.The maximum deformation and stress of the whole machine occur in the headstock,and the main vibration modes of the first 2 order natural frequencies are the main headstock components,so the key component affecting the dynamic performance of the machine tool is the headstock.