钛合金叶片加工变形的迭代循环分析研究

Research on Machining Deformation of Titanium Alloy Blade Based on Iterative Cycle Analysis

钛合金叶片加工过程中极易发生弹性变形。针对钛合金叶片铣削变形,在考虑变形量和铣削力相互影响的情况下,首先进行了迭代循环分析,并建立迭代循环模型,接着通过有限元分析的方法,获得了钛合金叶片铣削加工的变形规律,即每个铣削位置的具体变形量。研究结果表明:考虑迭代循环后,最终实际切削深度与名义切削深度有差别,并且导致实际变形量与初始变形量在每个铣削位置均存在差异,尤其在变形量最大处,迭代后变形量相对于初始减少了59μm。

Elastic deformation is easy to occur in the process of processing titanium alloy blades.Aiming at the milling deformation of titanium alloy blades,considering the interaction between deformation and milling force,the iterative cycle analysis is carried out,and the iterative cycle model is established.Then the deformation law of titanium alloy blades in milling is obtained by finite element analysis,that is,the specific deformation at each milling position.The results show that after considering the iteration cycle,the final actual cutting depth is different from the nominal cutting depth,and the actual deformation and the initial deformation are different in each milling position.Especially at the maximum deformation,the deformation after iteration decreases by 59 microns compared with the initial one.