组合机床与自动化加工技术
組閤機床與自動化加工技術
조합궤상여자동화가공기술
MODULAR MACHINE TOOL & AUTOMATIC MANUFACTURING TECHNIQUE
2015年
8期
43-46,50
,共5页
切削%有限元%本构模型%Abaqus
切削%有限元%本構模型%Abaqus
절삭%유한원%본구모형%Abaqus
cutting%finite element%constitutive model%Abaqus
主要对A357铝合金的正交切削加工过程在有限元软件Abaqus中进行了有限元仿真。有限元仿真所用材料的本构模型为Johnson-Cook模型，其本构模型参数通过Hopkinson杆冲击实验获得。通过改变仿真的切削速度和切削深度，观察刀具所受到的力和零件最终加工表面质量，最终通过比较对切削速度和切削深度进行优化，并用其得到的数据对实际加工过程进行指导，最终加工结果表明采用有限元仿真所提供的切削参数能明显提高加工质量，进一步说明有限元仿真对实际加工具有重要意义。
主要對A357鋁閤金的正交切削加工過程在有限元軟件Abaqus中進行瞭有限元倣真。有限元倣真所用材料的本構模型為Johnson-Cook模型，其本構模型參數通過Hopkinson桿遲擊實驗穫得。通過改變倣真的切削速度和切削深度，觀察刀具所受到的力和零件最終加工錶麵質量，最終通過比較對切削速度和切削深度進行優化，併用其得到的數據對實際加工過程進行指導，最終加工結果錶明採用有限元倣真所提供的切削參數能明顯提高加工質量，進一步說明有限元倣真對實際加工具有重要意義。
주요대A357려합금적정교절삭가공과정재유한원연건Abaqus중진행료유한원방진。유한원방진소용재료적본구모형위Johnson-Cook모형，기본구모형삼수통과Hopkinson간충격실험획득。통과개변방진적절삭속도화절삭심도，관찰도구소수도적력화령건최종가공표면질량，최종통과비교대절삭속도화절삭심도진행우화，병용기득도적수거대실제가공과정진행지도，최종가공결과표명채용유한원방진소제공적절삭삼수능명현제고가공질량，진일보설명유한원방진대실제가공구유중요의의。
The finite element simulation of A357 orthogonal cutting was done based on the software of Abaqus. Johnson-Cook constitutive model was chosen for the part, the constitutive model parameters were got based on the Hopkinson experiment. The cutting forces and surface qualities were observed based on dif-ferent cutting velocities and depths of cut. At last, the cutting velocity and depth of cut for the best surface quality was chosen, and the experiment was done with the guidance of the FEM ( finite element model) model, and last, it can prove that surface property of the machined workpiece can be improved effectively with the cutting parameters provided by the FEM model, so it can be concluded that the FEM simulation can provide significant guidance to the machining process in practice.
