DOI QR코드

DOI QR Code

A Research on Lengthening the Life of Warm Forging Die

온간단조금형의 수명연장에 관한 연구

  • Kim, Sei-Hwan (School of Mechanical&Automotive Engineering, Kongju National Univ)
  • 김세환 (공주대학교 기계자동차공학부)
  • Published : 2010.01.31

Abstract

Rotor pole for AC(alternating current) generator is manufactured through transfer warm forging die. As soon as the material is heated at the warm manufacturing process, it is transferred to the first stage for upsetting work and then to the second stage for lateral extrusion work. The processes at the lateral extrusion work such as die block, die bushing, center punch, and side punch make severe condition and abrasion which leads to shorten the die life. This causes production decrease, long maintenance time, and low level of precision. Research on the die material selection, heat process cycle improvement, electric discharge machining trouble solution, and re-construction of main parts is expected to find a method to lengthen the die life up to 40 - 50%.

Keywords

Warm forging;Forging work;Lateral extrusion;Impression

References

  1. 板垣敏, ドイツの型鍛造, 新日本鍛造協會, 大阪市, PP.188-189, 223-225, 1983.
  2. 板垣敏, 鋼の의 型鍛造, 新日本鍛造協會, 大阪市, PP.17-20, 1983.
  3. 편집부역, 프레스핸드북, 기전연구사, 서울 PP.73-118, 1987.
  4. Louis Schuler, Metal forming handbook, Louis Schuler Goppingen, Hamgurg, PP.91-95, PP.285-286, 1966.
  5. 財團法人 鍛造技術硏究所, 鍛造技術講座, (株)東神堂, 東京部,PP.106-107, 1981.
  6. 鍛造ハンドブック編集委員會編, 鍛造ハンドブック, 日刊工業新聞社, 東京都 PP.286-314, PP.391-418, 1971.
  7. 小松硏究所, 冷(溫)間鍛造の基礎技術, (株)小松製作所, Tokyo, PP.15-30, 1988.
  8. 김박윤역, 압축가공금형, 대광서림, 서울, PP.191-196, 1984.
  9. Kurt Lange, Handbook of Metal forming, McGraw-Hill Co, New york, PP.15.1-15.93, 1985.
  10. 이해영, 온간단조세미나, 만도기계(주), 경주공장, 1991.
  11. 제진수, 김재훈, 강성수 "온간단조에서의 소성변 형과 결정입자 변화와의 관계" "대한기계학회", 大韓機械學會論文集 A. 제20권 제2호, pp. 461-471, 1996.
  12. 小松硏究所, 冷間鍛造の實務, (株)小松製作所, Tokyo, PP.15-17, 1988.