• Title/Summary/Keyword: 역재드로잉

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A Study on the Forming Process Design of Engine Pulleys for Automobiles (자동차 엔진풀리 성형 공정 설계에 관한 연구)

  • 신보성;최두선;송선호;백재현
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.04a
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    • pp.630-634
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    • 1997
  • In this paper,we will discuss in the forming process design of the making engine pulleys for automobiles. These pulleys are required to be made by precision deep drawing process because these are to be combined with bearings and engine timing belts. These pulleys are used of cold rolled steel plates starting with the initial blanking size of 115.2mm and the initial thickness of 1.2mm. Our deep drawing process is designed the continuous 5-steps process, that is, 1'st deep drawing, 2'nd reverse redrawing, 3'rd trimming, 4'th drawing-ironing and 5'yh piercing. This process need no in-process annealing.

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A Study on the Forming Process Design of Cylindrical Multithickness Shell (다단 벽두께 원통 쉘 성형 공정 설계에 관한 연구)

  • 신보성;최두선;김동진;김병민;한규택;신영우
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1996.11a
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    • pp.943-948
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    • 1996
  • In this paper. we will discuss in making large size cylindrical shells with multithickness wall sections such as straight, stepped, tapered sides. These shells are constructed of type 6061 O temper aluminum starting with a blanking size of 877 mm plate. Its diameter to length ratio of 1 to 2.78 and a 36.7% wall reduction is achieved by our continuous deep drawing process. This process required no in-process annealing. But after cold working, these shells is performed heat treatment to T6 condition. These shells are used for the making of seamless LPG pressure vessels after the spinning process. This process is composed of deep drawing, reverse redrawing, drawing-ironing and several ironing processes. In the verification of forming process design, we used DEFORM code.

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