The dynamic characteristics of machine tools have significant effects on their processing quality and processing efficiency. Good dynamic performance of machine is the guarantee of machining accuracy. Modal analysis is the foundation of testing the dynamic characteristics of the machine. Model of Column and spindle box of TH6213 boring and milling center machine are established by using the Solid Edge software. Modal analysis for the column and spindle box was done with ANSYS Workbench to get its natural frequency and mode shape. All this provides the theoretical basis for optimizing the structure.
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