Investigation of Formability of Cylindrical Cups in Warm Drawing of Stainless-Aluminum Clad Sheet Metal

스테인리스-알루미늄 클래드 강판재의 원형컵 온간 성형성 연구

  • Published : 2000.01.01


Warm, forming technique which is one of the new forming technologies to improve formability of sheet metal is applied to the cylindrical cup drawing of stainless-aluminum. clad sheets. In experiments the temperature of die and blank holder is varied from room temperature to 18$0^{\circ}C$, while the punch is cooled by circulation of coolant to increase the fracture strength of workpiece on the punch corner area. Test materials chosen for experiments are STS304-A1050-STS304, STS304-A1050-STS430 clad sheets and A1050-0 aluminum sheet. Teflon film as a lubricant is used on both sides of a workpiece. The limit drawing ratio as well as quality of drawn cups(distribution of thickness and hardness)are investigated and validity of warm drawing process is also discussed.


Warm Forming;Clad Sheet Metal;Formability;Teflon Film;Limit Drawing Ratio


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