서지주요정보
3롤 압연공정의 근사변형모델 개발 = Development of approximated deformation model for 3-roll rolling system
서명 / 저자 3롤 압연공정의 근사변형모델 개발 = Development of approximated deformation model for 3-roll rolling system / 민지현.
저자명 민지현 ; Min, Ji-Hyun
발행사항 [대전 : 한국과학기술원, 2003].
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소장정보

등록번호

8013875

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 03033

SMS전송

도서상태

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반납예정일

초록정보

In process design of bar rolling with multi-passes, accurate prediction of deformed geometry of the rolled workpiece is crucial. Unlike the 2-roll system for which many models are already available in predicting deformed geometry, many studies have not been carried out for the 3-roll system. Recently, finite element (FE) analyses have been applied for accurate prediction of the deformed geometry in the 3-roll rolling process. However, it requires large computation time. Thus, development of an analytical model for predicting accurate rolled geometry with less computation time will be beneficial for practical purpose. In the present study, a model for prediction of deformed shape was developed first. And, based on this model, a model for prediction of strain of the workpiece was developed. For this purpose, the model for prediction of deformed shape in the 3-roll system with multi-passes was developed by deriving spread and geometrical configuration formula from FE analysis results. Among the proposed formulae for prediction of deformed geometry, the equivalent rectangular transformation method applied to the spread formulae was used to develop a model for prediction of strain. It was assumed that deformation of the workpiece was occurred in the directions of principal coordinates. And then, calibration coefficient was introduced to consider the characteristics of each pass. For FE simulations an in-house FE program CAMProll, developed based on the rigid-thermoviscoplastic approach was used. In FE simulations, process parameters such as the initial workpiece geometry and amounts of roll draft and rolling speed were varied. By comparing spread ratios of FE simulation results five representative geometry changes (round ― semi-hexagonal, semi-hexagonal ― hexagonal, hexagonal ― hexagonal, hexagonal― oval, and oval ― round) were identified. For each representative geometry change those two formula were determined in the present investigation.

서지기타정보

서지기타정보
청구기호 {MME 03033
형태사항 iv, 69 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Ji-Hyun Min
지도교수의 한글표기 : 임용택
지도교수의 영문표기 : Yong-Taek Im
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 30-32
주제 근사변형모델
3롤
압연공정
등가사각형 변환법
approximated deformation model
3-roll
rolling system
equivalent rectangular transformation method
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