특수 기어의 Fine Blanking 성형에서 Die Chamfer형상이 Die Roll Height에 미치는 영향에 관한 연구

In this paper, the relation between die roll height and die chamfer shape was studied by fine blanking experiments for special gear. The three die inserts with different shapes of die chamfer were machined, and fine blanking tool was manufactured. Using the fine blanking tool, three experiments were conducted on the 650 ton fine blanking press. Each die roll height was measured, analyzed and we found the tendency of die roll heights on special gear to increase with increasing die chamfer angle, when the horizontal distance of die chamfer was constant. This result can be used to minimize the die roll height of fine blanking automobile parts when designing die chamfer.