Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Automatic Surface Generation for Extrusion Die of Non-symmetric H-and U-shaped sections

비축대칭 H-형 및 U-형상의 압출금형 곡면의 자동생성

  • 유동진 (대진대학교 컴퓨터응용기계설계학과) ;
  • 임종훈 (대진대학교 기계설계공학과 대학원) ;
  • 양동열 (한국과학기술원 기계공학과)
  • Published : 2003.10.01
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Abstract

In this paper, an automatic surface construction method based on B-spline surface and scalar field theory is proposed to generate the extrusion die surface of non-symmetric H-and U-shaped sections. The isothermal lines and stream lines designed in the scalar field are introduced to find the control points which are used in constructing B-spline surfaces. Intersected points between the isothermal lines and stream lines are used to construct B-spline surfaces. The inlet and outlet profiles are precisely described with B-spline curves by using the centripetal method for uniform parameterization. The extrusion die surface is generated by using the cubic curve interpolation in the u-and v-directions. A quantitative measure for the control of surface is suggested by introducing the tangential vectors at the inlet and outlet sections. To verify the validity of the proposed method, automatic surface generation is carried out for extrusion die of non-symmetric H-and U-shaped sections.

Keywords

References

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