Visualization of Shear Processing Condition by Die Vibration Monitoring

This is a report on research aimed at visualizing the punching state for detecting tool wear by analyzing the vibrations of the die. In this study, we examined the possibility of visualizing shear processing state by comparing surface of punching hole with corresponding vibration data. Vibration data during punching with non-wear and wear tools were obtained by using an accelerometer on the outside of the punching die. Load and displacement data were also recorded. The cut surface of each punch hole was observed with a scanning electron microscope. As a result of analyzing the cut surface and the corresponding vibration data, there was a correlation between the cut surface and the vibration data for both the non-wear tool and the wear tool. These results suggested the possibility of tool wear detection during punching by sensing the vibration of the die.