Abstract
In high-precision product industries, controlling residual stress-induced distortions in large, thin-walled components is critical in order to produce high-quality light-weight components. Understanding the residual stress history is key to deal with this problem. In this study, the residual stress history from start to end of multi-step machining is measured and investigated in order to better understand the influence of machining strategies on the part distortions. The multi-step machining process is utilized to investigate the relation between residual stress history, the machining-induced residual stress and the part distortion. An analytical model is used for reference and comparison with experiments. The experimental work is performed using multi-step milling process as experimental set-up, X-Ray diffraction to measure residual stresses, and CMM to measure the profile and the distortion of the thin structure.
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