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


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%.


Warm forging;Forging work;Lateral extrusion;Impression


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