Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Investigation on the Description Method of Extrusion Die Surface using NURBS Surface and Area Mapping Method

NURBS 곡면과 면적사상법을 이용한 압출 금형 곡면의 표현방법에 관한 연구

  • 유동진 (대진대학교 컴퓨터응용기계설계학과) ;
  • 권혁홍 (대진대학교 기계설계공학과) ;
  • 임종훈 (대진대학교 기계설계공학과 대학원)
  • Published : 2003.07.01
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Abstract

In order to construct the extrusion die surface of arbitrarily shaped sections, an automatic surface construction method based on NURBS surface and area mapping method is proposed in the present work. A center point fur area mapping is determined by introducing the mapping concept based on constant area proportionality between original billet and final product. The characteristic points of inlet profile are determined using the traditional area mapping method and the root finding numerical method. The inlet and outlet profiles are precisely described with NURBS curves using the characteristic points of entry and exit sections. For the construction of NURBS surface, an interpolation method for the pre-determined two section curves has been developed to be used in the generation of interior control points and weights. To show the validity of the proposed method, automatic die surface generation is carried out for the several kinds of shaped sections.

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References

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Cited by

  1. Automatic Surface Generation for Extrusion Die of Non-symmetric H-and U-shaped sections vol.12, pp.6, 2003, https://doi.org/10.5228/KSPP.2003.12.6.572
  2. Automatic Surface Generation for Extrusion Die of Arbitrarily Shaped Section using B-spline Surfaces and Scalar Field Theory vol.13, pp.1, 2004, https://doi.org/10.5228/KSPP.2004.13.1.033