磨床工具機之結構設計必須達到剛度高、穩定性高以及振動低的標準,因此解決機台結構問題是必要性的。本論文利用CAE軟體ABAQUS,進行磨床工具機之結構剛度以及模態特性的有限元素分析,並且以模態實驗做為分析驗證比較。 本論文使用結構最佳化設計軟體TOSCA進行磨床結構的拓樸優化設計,最後經由分析得到優化結果:整機結構重量由5.14 tonne下降至4.63 tonne,下降9.92%;應力由0.759Mpa下降至0.237Mpa,下降68.77%;位移量由1.3μm下降至0.936μm,下降28%;剛性由153.85 MNm-1提升至213.68 MNm-1,提升39%;模態頻率提升16~34%。由比對結果可以判斷磨床機結構經由本研究達到輕量化以及降低應力之目標,並可將結果提供差異參考使用。
Grinding machine tool structural design should meet the standards of high rigidity, high stability and low vibration. Thus, it is necessary to solve the machine structural problem. This paper used the CAE software ABAQUS to conduct the finite element analysis of the grinding machine tool, structural rigidity and modal properties with modal experiments as the auxiliary of modal property analysis. Then, the structural optimization design software TOSCA was employed in the grinder structural topology optimization design. Finally, the results before and after optimization were analyzed and evaluated. The weight of the structure fell from 5.14 ton to 4.63 ton, reducing by 9.92%; the stress fell from 0.759Mpa to 0.237Mpa, reducing by 68.77%; the displacement fell from 1.3μm to 0.936μm, reducing by 28%; rigidity increased from 153.85 MNm-1 to 213.68 MNm-1 by 39%; the modal frequency increased by 16~34%. The comparison results suggested that the proposed method can reduce the weight of the grinder structure and stress. The results can serve as a reference in the research of natural frequency.