Using a progressive die of the multi-stage drawing product, It was experiments for the Influence of the Products Roundness on the die pad process Safety die model, obstacle countermeasure research safety die design When the die pad is independent structure, Sidewall thickness of the inside 2stage, 3stage, 4stage of the product is thicker, the thickness of the inside 1stage and the bottom is thinner. it was become unstable beacuse the inside 1stage related to the Products Roundness is thinner. When the die pad is Integrated structure, Sidewall thickness of the inside 1stage, 2stage of the product is thicker, and Sidewall 3stage and 4stage was a thin. it was become unstable beacuse the inside 3stage related to the Products Roundness is thinner. Therefore, The appropriate combination of and integrated independent is required for each process.

Abstract
 1. 서 론
 2. 본론
  2.1 제품도 분석 및 스트립레이아웃
  2.2 프로그레시브 드로잉 금형제작
 3.실험 결과 및 고찰
  3.1 독립형 다이패드
  3.2 일체형 다이패드
  3.3 독립형과 일체형 다이패드의 비교 고찰
 4. 결론
 5. 참 고 문 헌

• 이춘규(유한대학교 금형설계과) | Chun-Kyu Lee Corresponding Author
• 남승돈(유한대학교 금형설계과) | Seung-Done Nam