零件结构形式对铣削加工变形的影响研究

Study on the machining deformation of milling because of part structure type

在弹塑性理论的基础上,建立了三维铣削仿真加工变形场的有限元分析模型,利用“单元生死”技术仿真了加工过程中材料的去除。研究了零件结构不同,加工过程中毛坯初始残余应力的释放对加工变形的影响,通过仿真数据与试验数据相比较,结果表明,只要建立正确的三维有限元分析模型,完全可以实现对零件加工变形规律的预测;工件毛坯残余应力在铣削加工过程中对称释放有利用减小零件加工后变形。

Based the plastic-elastic method, the 3-D milling FEM analysis model is established in this paper, which uses the ＂element birth and death＂ technique to simulate the material removal process.This paper studies the release of initial residual stress how affects the deformation with different structure parts machining. Through contrasting the results can be drawing that the machining deformation law can be gain of simulation and experiment, it is if the reasonable 3-D FEM model established; the symmetry release of the residual stress benefits to reduce the machining deformation.