Research On Machining Distortion Of Thin-walled Rotary Part

Residual stress in the blank of thin-walled part and the cutting force are two important factors which lead to the machining deformation of thin-walled part. Based on theoretical analysis, numerical simulation method and experiments, research the release of residual stress and milling force of the blank of thin-walled part.The major research works are listed as follows:Firstly, the experiment of milling force was processed to establish the milling force empirical formula. Then simulation machining deformation prediction model of thin-walled part was established to study the effect of milling force on machining deformation.Secondly, the numerical simulation、hole-drilling method and contour method were combined to study the residual stress in the blank of thin-walled part. Comparing the results of hole-drilling and contour method with the numerical simulation method, we could get the distribution of residual stress after heat treatment. Then we would analysis the characteristics of residual stress in the blank of thin-walled part.Finally, based on initial residual stress in the blank of thin-walled part, different amount of material removal from the blank of thin-walled part, different location of the thin-walled parts in the blank and different size of residual stress in the blank of thin-walled part was analyzed to find the relationship with machining deformation.