肩部回転ダイを用いた波面容器の成形性

抄録

The formability of the corrugated cup was investigated by the deep drawing process. The die having rotating shoulder was used to enhance the functionality of the drawn cup. The blank is formed into a cylindrical cup by means of a punch that presses the blank into the die cavity. To form the corrugated surface, the bearing balls were set on the shoulder of a die. The balls rotate freely during forming. The deep drawing process was performed using an oil hydraulic press at a forming speed of about 10 mm/min. The blanks were commercially extra-low carbon steel SPCC, stainless steel SUS304, pure cooper C1100, and pure titanium TP340. The initial diameter and thickness of the blank are 70 to 100 mm and 0.5 mm. The lubricant used was the solid powders of molybdenum disulfide. The metal sheets were successfully drawn without the cracks. It was found that the corrugated cups were successfully formed by using the roller die.