Abstract
Punch velocity is one of the important parameters in the punching process. The choice of punch velocity is difficult because it has a different influence on each material. Therefore, it is important to know the effect of punch velocity on the material to be worked. The purpose of this study was to investigate the punch velocity effect on punch force and burnish height of the punched holes in the punching process of pure titanium sheets. The punching process used was a pneumatic punch machine with punch velocity of 10, 35, 70 mm/s. The result shows that when punch velocity of 10, 35, 70 mm/s, punch force that occurred each by 357, 408 and 434 N. Burnish height resulted by 0.194, 0.200 and 0.241 respectively. Its indicates that punch velocity affected on punch force and burnish height of punch holes. When punch velocity increased, punch force and burnish height of the punched holes increased.
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