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Prediction of the sound pressure level of blanking noise during sheet-metal blanking using servo press with counterforce

Qinxiang Xia,Teng Xu,Guohua Hong,Weiping Ruan 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.5
In this research, a prediction model of the sound pressure level during blanking using servo press with counterforce was establishedbased on the acoustic theory as well as the vibration equation of punch in the course of breakthrough process. The theoretical values ofthe sound pressure level of blanking noise were calculated based on the developed prediction model. The variation of the sound pressurelevel of blanking noise with different parameters was also investigated and compared with the experimental results. It reveals that theblanking noise increases with the shear strength and the thickness of sheet metal, and further the blanking speed. The relative error betweenthe experimental results and the theoretical ones determined based on the prediction model is less than 1.7%, and the applicationexample of the prediction model in batch production is given. The prediction model is thus proved to be promising and efficient for noiseprediction during blanking using servo press with counterforce.