Analysis of Static and Dynamic Characteristics of the Structure of the Heavy Cutting Gantry Boring and Milling Machining Center
In order to accurately evaluate the dynamic and static characteristics of the structure of the heavy cutting gantry boring and milling machining center during the design phase,a finite element model was established for the entire structure of the machining center,and the static and dynamic characteristics as analyzed.The accuracy and effectiveness of the dynamic simulation model were veri-fied through modal testing,and suggestions for structural optimization of the machining center were proposed based on the analysis re-sults.The results show that the static stiffness in the Y direction of the machining center is low due to the insufficient static stiffness of the ram,under 1 500 N cutting force,the maximum deformation can reach 0.008 137 mm.The first six measured natural frequencies of the machining center are 41.87 Hz,55.69 Hz,88.06 Hz,103.45 Hz,129.68 Hz and 159.41 Hz,respectively.The average simulation cal-culation error of the first six natural frequencies is 6.5％.The positions of the columns and rams are prone to significant dynamic deform-ation response under external excitation forces.
heavy cutting gantry boring and milling machining centerfinite element analysisstatic and dynamic characteristicsmodal testing
万方数据
维普
