【摘要】 为了对钛合金铣削残余应力变形进行研究,文章基于钛合金矩形块进行切削试验,并利用X射线法与剥层法结合获得铣削残余应力沿深度分布的规律,根据分布规律,提出了一个改进的指数衰减函数模型,将实验数据与预测模型进行了对比,其结果显示具有良好的拟合效果。为研究薄壁件的切削残余应力变形控制,构建了以钛合金薄板的残余应力变形验证实验,获得了钛合金薄板的实际变形挠度,得到了铣削后残余应力变形规律。结合预测模型的残余应力变形结果,与实际变形结果进行了对比分析,结果表明:预测模型的结果与试验结果非常接近,平均误差为15.18%,具有一定的可行性和准确性。更多还原

【Abstract】 In order to study the residual stress and deformation of titanium alloy in milling, cutting experiments were carried out based on a rectangular block of titanium alloy, and the law of the distribution of residual milling stress along the depth was obtained by using X-ray method and layer peeling method. According to the distribution law, an improved index was proposed. The experimental data were compared with the data from prediction model, and the results showed that it had good fitting effect, and the results show a good fitting effect. In order to study the control of cutting residual stress and deformation of thin-walled parts, a verification experiment of residual stress and deformation of titanium alloy sheet was constructed, which obtained the actual deformation deflection of the titanium alloy sheet and the residual stress deformation law after milling. Combining the residual stress and deformation results of the prediction model, a comparative analysis was carried out with the actual deformation results. The results show that the prediction model is close to the experimental results, and the average error is 15.18%, which is feasible and accurate.更多还原