Abstract
A virtual prototype was built in the dynamic design process of grinding and polishing machine tool for blisk. Through the analysis of multi-body dynamic of main structures changed to be flexible, column and beam had been found to be the weak link of the whole machine tool. Column and beam were optimized by changing the layout of plate to improve the low order natural frequency. The multi-objective optimization solutions of column were obtained through the genetic optimization algorithm in the FEA software. The sensitivity analysis was used to correct a set of optimized solution for the engineering. According to the optimization result, a new beam structure with inclined reinforcement plate is put forward. The first three order natural frequency of the optimized column increased by 11.9%, 18.2% and 2.8% respectively. The first three order natural frequency of the optimized beam increased by 45.3%, 8.23% and 17.8%. Analysis result of the whole machine tool show that the static and dynamic properties had improved significantly after optimization.
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