Dynamic Performance Analysis And Topology Optimization Of The Key Parts Of Deep Hole Drilling Machine Tools

The deep hole machine tools play an important role, as one of the major processingequipments of deep hole processing. Its processing performance and accuracy haveprofound impact on the quality of hole machining. However, its safety factor is tooconservative because that the key parts of the deep hole machine tools are designed withexperience or followed the traditional methods or imitated foreign products. The resultsare that the volume of part is heavy and structure design is not reasonable. So it directlyaffects their dynamic characteristics and static characteristics. And there is a directimpact on the stability of the machining accuracy and precision. In recent years, to obtaina good result, topology optimization methods are introduced into the design andimprovement of the machine tools by many scholars. But it is less used in deep holemachine tools. So the topology optimization technology for deep hole machine toolsresearch has important significance and application value.In the article, the spindle box and machine bed of Z8016are performed modalanalysis and structural optimization design based on FEA and topology optimization asresearch objects. Before analyzing, first modifying the modal in the UG, then the modelis imported to the HyperWorks software in IGES type. The lower modes and thecorresponding vibration shape diagram of spindle box and machine bed are obtainedthrough modal analysis. The topology optimization models are established based onvariable density method. The optimal distributions of structural material of spindle boxand machine bed are obtained. Depending on the optimization results and lower vibration shape diagram, the models of spindle box and machine bed are redesigned. Thefirst-order natural frequency of new structure of spindle box is improved by9.69%, themass is reduced by5.87%. The machine bed’s first-order natural frequency has almost nochange, the mass is reduced by11.22%. The dynamic characteristics met therequirements of design. The optimization method adopted offers a feasible method forthe optimization design of other critical parts of deep hole machine tools.