Influence of Cutting Speed on the Quality of Blanked Parts

The present paper covers and describes the influences of speed cutting on the part edge quality of blanked parts. Experiment shave been conducted using different material, punch die clearances and different cutting speeds. In order to determine the reachable cutting speeds and calculate the energy required for blanking, velocity stroke cures were obtained. The quality of the part edges shows that higher cutting speeds can improve the part edge quality, resulting in smaller burr height and rollover, and a larger shear zone. Furthermore, it could be observed that the part quality improvement when blanking with high cutting speeds is much more distinct for stele than for copper or aluminum. According to blanking theory, this improvement was expected because copper and aluminum have much higher heat conduction coefficients. Therefore, the at dissipates faster and the desired stress relief effect does not take place to the same degree as for stele.