Measurement of Pre-Self-Balanced Surface Residual Stresses Induced by Milling in Titanium Alloys and the FEM Validation
Measurement of Pre-Self-Balanced Surface Residual Stresses Induced by Milling in Titanium Alloys and the FEM Validation
复制标题
DOI：
10.4028/www.scientific.net/amr.996.615
复制
发表时间：
2014-08
期刊：
影响因子：
--
通讯作者：
L. Meng;N. He;Liang Li;Yinfei Yang;Wei Zhao
中科院分区：
文献类型：
--
作者：
L. Meng;N. He;Liang Li;Yinfei Yang;Wei Zhao
钛合金工件采用侧铣加工，铣削加工在工件表层会产生较高的残余应力。逐步腐蚀应力层，测量腐蚀过程中工件弯曲挠度的变化。用逆向思维，根据底层的应力值和弯曲挠度的变化计算上层的应力值。最后，该方法得到的应力值优于自平衡状态，排除了工件尺寸和形状的影响。根据该方法得到的应力值，可以准确地预测不同尺寸和形状的工件的变形。用有限元法验证了该方法的正确性。
Flank milling was used to machine titanium alloy workpieces, and there would be high residual stresses induced by milling in the superficial layer of the workpieces. Corrode the stress layers gradually and measure the changes of workpiece’s bending deflection during the corrosion process. With reverse thinking, calculate the stress values in the upper layers based on the values in the bottom layers and the changes of the bending deflection. At last, the stress values got by this method are prior to the self-balanced state, so the result rules out the factors of the workpiece’ size and shape. The deformations of workpieces with different sizes and shapes can be predicted accurately based on the stress values got by this method. The correctness of the method has been verified by Finite Element Method(FEM).