Structure Analysis And Optimization Design Of Longmen Milling Machine

The five axis CNC machining center are widely used in complex curved surface processing, is a kind of high performance automation servo drive precision processing technology, with high efficiency, low value-added manufacturing, precision, low production cost, automatic processing, etc. Through to the five axis CNC processing center of the study, can improve mechanical manufacturing industry in China international competition comprehensive contend for power has a very important significance.Reform and opening up30years since, our country machinery manufacturing level is dramatically increasing, manufacturing technology level and total production also has greatly improved. Whether in product research and development, technology and equipment, or processing capacity of all aspects of made a lot of progress. But Germany, Japan compared. The United States and other manufacturing power our country there are still some difference.This thesis topic from Jilin science project "Large CNC Machine Tool Design and Manufacturing Technology Research", and with Changchun numerical control machine tool Co., LTD. Cooperation, to the original GMCU type2060five axis of Longmen CNC milling machine machining center for the tool machine structure is analyzed, and the optimization, improve the structure design of shortage, reduce production cost, improve the machining accuracy.In this paper, GMCU2060type five axis CNC milling machine processing center in Longmen as the research basis, mainly to complete the following tasks:①according to the structure of the machine model of two-dimensional drawings, using3D entity model building software to complete the construction of three-dimensional model;②the model into finite element analysis software, the simplified model, FEA meshing and setting boundary load, price, material and element attributes such as pretreatment of the actual working conditions of simulated machining center;③on the machine and the beam member is static, modal analysis, the mechanism of the maximum displacement and the first six natural frequencies and the corresponding vibration modes. Extraction of the relevant data and Changchun CNC machine tool limited company to provide the relevant data were compared to the actual working condition;④through the analysis and calculation of data and contrast, find the body of the weak link in the design, increasing the internal rib plate thickness, improve the beam of first-order natural frequency, and then through the topology optimization to reduce the structure weight, through the optimization of the beam for static and dynamic analysis of beam in the steady-state load obtained maximum deformation for the0.0975mm first-order natural frequency119.72Hz design optimization results, to meet the design target.This paper adopted by the finite element analysis is a kind of advanced technology and actual production condition of the combination of the typical, and to GMCU type2060five axis of Longmen CNC milling machine processing center as an example, this paper discusses the basic principle of structure design machine tools and method. To our country in the independent research and development machine tool structure made an important step.