考虑J-C本构参数的铝合金铣削温度预测模型OA

To accurately predict the workpiece temperature in the milling of aluminum alloy and reduce its adverse effects on machining quality,the shear angle model based on the Johnson-Cook(J-C)constitutive parameters of aluminum alloy is modified.The deformation temperature in the shear zone and the friction angle are obtained by using the Abaqus simulation software and the adhesive-slip friction model.Considering the discretized heat source intensities in both the shear zone and the ploughing zone,a workpiece temperature prediction model for aluminum alloy milling is established based on the moving heat source method,and the accuracy of the model is verified via orthogonal cutting experiments of aluminum alloy.The results show that the average error between the predicted temperature and the experimental is 4.96％,the maximum error is 10.9％,and the minimum error is 0.47％.The influence laws of the cutting parameters on the workpiece temperature are basically consistent.Comparing with the existing models,the prediction accuracy is improved to a certain extent,which verifies the feasibility and accuracy of the present prediction model for milling temperature.The model can be applied to the machining temperature prediction and thermal deformation control of aluminum alloy structural parts in actual production,thus ensuring the machining quality of parts.