Quality prediction model of the sheet blanking process for thin phosphorous bronze

In this paper, the shearing experiments for the progressive die of thin phosphorous bronze sheet were first performed to investigate the material of shearing punch, punch-die clearance, punch shear angle, and effect of the shearing stroke towards the burnish band of sheared surface, as well as the burr width of sheared corner. Then a prediction model of burr width was established by adopting the least-square method, exponential smoothing method and grey prediction theory, respectively. The findings show that the best prediction results can be achieved based on the dynamic model of grey prediction and it can be referred in the shear product estimate and the tool life prediction.