抄録
The formability of corrugated cup was investigated by deep drawing process using roller die. To form the corrugated shape on side wall, the bearing balls were set on the shoulder of a die. In addition, the balls rotate freely during forming. The test material was a rolled thin plate of commercially extra-low carbon steel SPCC 0.3 to 0.5 mm, punched out to a diameter of 85 mm. The deep drawing process was performed using an oil hydraulic press. The bearing balls were tool steel SUJ2 with a diameter of 10 mm or less. 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 cup having small wave shape was successfully formed by using the roller die.
