공형 압연에서의 표면흠 성장 모델링 및 제어 방법 연구Modeling and Controlling of Surface Defect Initiation and Growth in Groove Rolling
- Authors
- 나두현; 이영석
- Issue Date
- 2008
- Publisher
- 한국소성가공학회
- Keywords
- Surface Defect; Control Method; Groove Rolling; Maximum Shear Stress; Finite Element Analysis
- Citation
- 소성가공, v.17, no.8, pp 607 - 612
- Pages
- 6
- Journal Title
- 소성가공
- Volume
- 17
- Number
- 8
- Start Page
- 607
- End Page
- 612
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/31699
- ISSN
- 1225-696X
2287-6359
- Abstract
- The groove rolling is a process that transforms the bloom or billet into a shape with circular section through a series of rolling. Inhibition of surface defect generation in groove rolling is a matter of great importance and therefore many research groups proposed a lot of models to find the location of surface defect initiation. In this study, we propose a model for maximum shear stress ratio over equivalent strain to catch the location of surface defect onset. This model is coupled with element removing method and applied to box groove rolling of POSCO No. 3 Rod Mill. Results show that proposed model in this study can find the location of surface defect initiation during groove rolling when finite element analysis results is compared with experiments. The proposed criterion has been applied successfully to design roll grooves which inhibit the generation of surface defect.
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Collections - College of Engineering > School of Mechanical Engineering > 1. Journal Articles
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