为解决航空薄壁齿轮切削加工过程中容易发生变形的问题,以航空薄壁齿轮半精切削加工过程为研究对象,建立航空薄壁齿轮切削过程的有限元仿真模型,基于田口法获取不同切削参数下的3 个方向的最大切削力数值,运用有限元法建立基于最大切削力的航空薄壁齿轮受力变形有限元仿真模型,得到不同切削参数对应的变形量,并运用极差分析法分析切削参数与变形的影响程度,优选出最佳切削参数组合.结果显示:背吃刀量对变形影响最大,切削速度对变形影响最小;优选得到的最佳切削参数组合为切削速度 376.47 m·min-1或451.79 m·min-1、进给量0.20 mm·r-1、背吃刀量1.0 mm.
Research on Cutting Deformation of Thin-Wall Gear Based on Taguchi Method and Finite Element Method
In order to solve the problem that deformation is easy to occur in the cutting process of aviation thin-wall gear,taking the semi-precision cutting process of aviation thin-wall gear as the research object,the finite element simulation model of the cutting process of aviation thin-wall gear is established,and the maximum cutting force values in three directions under different cutting parameters are obtained.A finite element simulation method based on the maximum cutting force was established to obtain the deformation corresponding to different cutting parameters,and the influence degree of cutting parameters and deformation was analyzed by using range analysis method,and the optimal combination of cutting parameters was selected.The optimal cutting parameters combination is the cutting speed of 376.47 m·min-1 or 451.79 m·min-1,feed rate of 0.20 mm·r-1 and back cutting rate of 1.0 mm.
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