论文部分内容阅读
受企业委托开发的TJK6916落地式数控镗铣床,主要由床身、滑座、立柱和主轴箱等部件组成,大量研究表明各结合面的刚度和阻尼占机床的总刚度和总阻尼的比例很高。文中,首先通过对TJK6916数控落地镗铣床样机进行模态试验,获得机床各主要结合部的模态参数;再利用有限元参数优化识别方法识别出各结合部的刚度和阻尼参数,并利用COMBIN14单元模拟已识别出的结合部刚度和阻尼参数建立TJK6916整机有限元模型。这一研究成果为该型机床有限元分析及优化设计提供了一定的理论依据。
The TJK6916 floor-standing CNC boring and milling machine, commissioned by the enterprise, is mainly composed of bed body, carriage, column and headstock. A large number of studies show that the rigidity and damping of the combined surfaces account for a large proportion of the total stiffness and total damping of the machine tool . In this paper, the modal parameters of the main joints of the machine tool are obtained through the modal tests on the prototype of TJK6916 CNC floor-standing boring and milling machine. Then, the stiffness and damping parameters of each joint are identified by the finite element optimization method. TJK6916 complete finite element model was established by simulating the identified joint stiffness and damping parameters. The research results provide a theoretical basis for the finite element analysis and optimization design of the machine tool.