비축대칭 H-형 및 U-형상의 압출금형 곡면의 자동생성Automatic Surface Generation for Extrusion Die of Non-symmetric H-and U-shaped sections

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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.
Publisher
한국소성가공학회
Issue Date
2003-10
Language
Korean
Citation

소성가공, v.12, no.6, pp.572 - 581

ISSN
1225-696X
URI
http://hdl.handle.net/10203/83608
Appears in Collection
ME-Journal Papers(저널논문)
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