Static And Dynamic Characteristics Analysis And Structure Optimization Of MV1890 Vertical Machining Center

As the development of modern high technology, in the engineering fields such as manufacture, agriculture, aircraft industry and ship industry, CNC machining has been the ahead of other processing equipments and the indispensable mainstream equipment for product processing. The high speed, high efficient and high precision machining characteristics of numerically-controlled machine tool are the primary causes. For the realization of these three high machining characteristics, the well static and dynamic characteristics of numerically-controlled machine tool must be guaranteed and the precondition is that the complete machine and main components of machine tool must possess good static and dynamic stiffness. So it is necessary to analysis the static and dynamic characteristics of machine tool, which provides technical support for improvement of machine tool’s performance.Based on the analysis and summary for domestic and overseas research for the static and dynamic analysis of tool’s complete machine and main components and the structure optimization design, this paper take the ‘MV1890 vertical machining centre’ as research object. The static and dynamic characteristics of complete machine and main components of machine tool is analysed. the structure optimization design of main components is done finally. The main research works are as follows;(1) Domestic and overseas research status for numerically-controlled machine tool is summarized. Finite element theory and structure optimization theory expounded. The function and application of CAE and software of finite element analysis ANSYS Workbench is introduced simply.(2) The CAD modeling software is applied to establish the entity model of ‘MV1890 vertical machining centre’, then pre-treatment operations include mesh generation for finite element model of vertical machining center is done through finite element analysis software.(3) The static and dynamic characteristics of complete machine and main components are analysed. The nephograms, dynamic vibration shape diagram and frequency response curve are obtained and analysed. The vulnerable sopts of machine tool are found out. These works provide preparation for improving static and dynamic characteristics of machine tool and further structure optimization design.(4) Multi-objective fuzzy optimization method and topology optimization method are used in the structure optimization design of the stand column, spindle box and saddle. The optimization results indicated that the deformation of complete machine tool and main components decreased, inherent frequency is improved.