立轴式机床铣夹具有限元拓扑优化分析
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摘要
铣夹具是立轴式机床系统中的关键部件,为了提高立轴式机床的工作性能,降低加工过程中的误差且便于装卸。采用Solidworks建立了立轴式机床铣夹具的三维模型,利用ANSYS对立轴式机床铣夹具的静、动态性能进行分析,确定夹具各个路径变形量的变化曲线,得到夹具变形云图和模态振型较大的云图,结合第四强度理论对立轴式机床夹具进行校核。在满足强度前提下,利用有限元Beta对夹具进行负载工况下的拓扑优化,确定了优化后的夹具模型。结果表明:优化后各个路径变形量明显下降且质量下降了12.7%,节约了生产材料,能快速的实现夹具的安装,为立轴式机床铣夹的结构优化提供参考。
Milling fixture is the key component in the vertical axis machine tool system.In order to improve the working performance of vertical axis machine tools and reduce the error in the processing process and make it easy to load and unload,Solidworks is used to establish the three-dimensional model of the vertical spindle milling fixture,and the static and dynamic performance of the milling fixture is analyzed by Ansys.The deformation curve of each path of fixture is determined,the deformation nephogram and the large modal shape are obtained,and the fourth axis strength theory is used to check the fixture of opposite axis.Under the condition of satisfying the strength,the topology optimization of the fixture is carried out by using the finite element Beta and the optimized fixture model is determined.The results show that the deformation of each path is decreased and the quality is decreased by 12.7% so that the production material is saved,and the fixture installation can be carried on quickly,which might provide reference for the structural optimization of milling fixture of vertical spindle machine tool.
Milling fixture is the key component in the vertical axis machine tool system.In order to improve the working performance of vertical axis machine tools and reduce the error in the processing process and make it easy to load and unload,Solidworks is used to establish the three-dimensional model of the vertical spindle milling fixture,and the static and dynamic performance of the milling fixture is analyzed by Ansys.The deformation curve of each path of fixture is determined,the deformation nephogram and the large modal shape are obtained,and the fourth axis strength theory is used to check the fixture of opposite axis.Under the condition of satisfying the strength,the topology optimization of the fixture is carried out by using the finite element Beta and the optimized fixture model is determined.The results show that the deformation of each path is decreased and the quality is decreased by 12.7% so that the production material is saved,and the fixture installation can be carried on quickly,which might provide reference for the structural optimization of milling fixture of vertical spindle machine tool.
引文
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[2]李志远,许娟红,魏涛,等.基于Workbench工装夹具设计与优化分析[J].机电工程技术,2017,46(11):14-16.
[3]阙燚彬,毛丹丹.一种专用夹具的有限元分析及结构优化[J].模具工业,2017,43(6):16-19.
[4]曹录海,任工昌,翁涛.基于Workbench的齿轮泵轮齿有限元分析[J].机床与液压,2015,43(1):127-129.
[5]Vijayalakshmi R,Panneerselvam R.Hydrodynamic response of a non-ship-shaped FPSO vessel with damping plates[J].Journal of Marine Science&Technology,2012,17(2):187-202.
[6]王志明,肖成林,杨翔宇,等.基于Hyper Works的耕整机机架组合式优化分析[J].农机化研究,2011,33(10):35-39.
[7]臧世宇,吴崇友,伍扬华.谷物联合收割机脱粒机机架有限元分析及优化[J].江苏农业科学,2016,44(12):347-349.
[8]郭宗泽,张卫红,陈裕泽.结构拓扑优化设计综述[J].机械设计,2007,24(8):1-6.