The static and dynamic stiffness of the flexible drilling machine tool is very important to ensure its machining accu-racy.In order to improve the overall performance of the flexible drilling machine tool,finite element model of the complete ma-chine was established to analyze the static and dynamic characteristics,select the key dimensions of the main components as de-sign variables,and determine the structural optimization plan of the whole machine based on the response surface method and the multi-objective size parameter optimization method,use LMS dynamic test system to complete the modal parameter identification of the whole machine.The research results show that after the optimized design,the mass of the machine tool is reduced by 7.2%,the maximum deformation is reduced by 23.1%,and the first-order natural frequency is increased by 33.6%.The static and dy-namic stiffness of the whole machine has been improved in different ranges,and the research results have certain guiding signifi-cance for improving the overall performance of the whole machine.
维普
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