지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 김영석
- 발행연도
- 2014
- 저작권
- 경북대학교 논문은 저작권에 의해 보호받습니다.
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초록· 키워드
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Ring rolling process which is as a part of plastic working is a suitable manufacturing method producing ring types parts. In this study, parts which have multi-shapes, 220mm of outer-diameter and 60mm of thickness have been required, and hot forging process for a blank have been confirmed by finite element analysis and then the results have been analyzed by hot forging and ring rolling at site. And the recovery rate of raw materials based on tested parts has been increased against general hot forging process. Also hot ring rolling process have been optimized by evaluating the quality of ring rolled parts and analyzing the capability.
Finally, as results of experiments, the input weight of raw materials has been reduced by 40% against general hot forging process and the recovery rate has been increased by 24%. The measurement of circularity which is a major quality issue during the ring rolling was very satisfied as 0.5mm average of inner and outer diameter. And the development of hot ring rolling processes for parts with ring and multiple shapes have been completed when we have found Cpk 1.49 of outer-diameter and Cpk 0.84 of inner-diameter.
Finally, as results of experiments, the input weight of raw materials has been reduced by 40% against general hot forging process and the recovery rate has been increased by 24%. The measurement of circularity which is a major quality issue during the ring rolling was very satisfied as 0.5mm average of inner and outer diameter. And the development of hot ring rolling processes for parts with ring and multiple shapes have been completed when we have found Cpk 1.49 of outer-diameter and Cpk 0.84 of inner-diameter.
목차
목 차List of Tables ⅲ List of Figures ⅳ1. 서론 11.1 개요 11.2 연구동향 21.3 연구목적 52. 해석 이론 72.1 소성유동 문제의 수식화 72.2 링 롤링 공정의 해석모델 122.3 요소망재구성 기법 133. 유한요소해석 203.1 블랭크 열간단조 공정 203.2 열간 링 롤링 공정 254. 제작 실험방법 및 결과 304.1 블랭크 열간단조품 304.2 열간 링 롤링품 325. 실험 결과 분석 376. 결론 46참고문헌 48Abstract 52
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