Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 04, 2024 - October 05, 2024
This study proposes a method for estimating surface hardness and residual stress in turning of carbon steel. The machined surface properties depend on the strain, strain rate, stress and temperature fields generated during cutting. Therefore, the strain, strain rate, stress and temperature fields are estimated from the cutting force using shear angle theory and a three-dimensional cutting model, and the hardness and residual stress are estimated using a linear regression model. The accuracy of the residual stress and hardness estimation was analyzed through validation experiments. In addition, the effect of modelling errors in the turning process simulation on the accuracy of hardness and residual stress estimation was analyzed. In the verification experiment, the cutting force, flank wear width, chip thickness, hardness and residual stress were measured. The analytical results clarified that the hardness and residual stress could be estimated accurately. The influence of the modelling error in the shear angle prediction is negligible on the estimation accuracy.
