서지주요정보
압출공정의 금형과 보강링의 치수 최적설계 = Optimal design of dimensions of die and stress rings in extrusion
서명 / 저자 압출공정의 금형과 보강링의 치수 최적설계 = Optimal design of dimensions of die and stress rings in extrusion / 안성찬.
저자명 안성찬 ; An, Sung-Chan
발행사항 [대전 : 한국과학기술원, 2000].
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소장정보

등록번호

8010864

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 00039

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

In the field of metal forming, the cold extrusion process is widely used for producing prismatic products due to various merits such as high strength, good surface quality, high accuracy and reduction in material waste. In this process the design of extrusion die sets is most vital to obtain high quality extruded products. In general, the die insert is subjected to very high contact pressure at the workpiece/die interface during cold extrusion. This high contact pressure leads to reduction in tool life caused by fatigue fracture due to repeated operations or overload fracture due to excessive hoop stress. A typical method of improving tool life is the use of shrink fitting, which generates compressive residual stress in the circumferential direction of the die. In this study, an optimal design technique was used for determining appropriate dimensions of components of the die set for shrink fitting. For this, an axisymmetric elastic FEM program for the analysis of deformation of the shrink fit die set was developed with the Lagrange multiplier method. In order to examine the accuracy of the developed program, the numerical results for a simple shrink fit die set were compared with the exact solutions provided by Lame's equation. Then, an optimal design system was developed with three components. A thermo-rigid- viscoplastic FEM program, CAMPform, was used for the forming analysis of extrusion process. The developed elastic FEM program was used for stress analysis of the die set. And an optimization program, DOT, was used for the optimization process. With the constructed system, optimal design was carried out for various single stress ring and multi-stress ring cases. It is construed that the proposed design method can be beneficial for improving the tool life of cold extrusion die set.

서지기타정보

서지기타정보
청구기호 {MME 00039
형태사항 iv, 84 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Sung-Chan An
지도교수의 한글표기 : 임용택
지도교수의 영문표기 : Yong-Taek Im
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 34-37
주제 최적설계
압출금형
보강링
라그랑주승수법
Optimal design
Extrusion die
Stress ring
Lagrange multiplier method
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