CAJ | 학술논문

利用三维热力耦合弹塑性有限元方法,通过模拟仿真考察了H型钢开坯轧机立辊压下量对R角半径变化的影响规律,并从轧辊R角和轧件R角匹配的角度阐述了腹板折叠的产生机理.结果表明:随着立辊压下量的增加,R角半径减小,且基本呈线性关系,R角形状波动也随立辊压下量增加而增大.提出了出现腹板折叠现象的临界条件,对于UC305 mm×305 mm规格近终形连铸异型坯,当压下量>38 mm或压下量<44 mm时出现腹板折叠.
이용삼유열력우합탄소성유한원방법,통과모의방진고찰료H형강개배알궤립곤압하량대R각반경변화적영향규률,병종알곤R각화알건R각필배적각도천술료복판절첩적산생궤리.결과표명:수착립곤압하량적증가,R각반경감소,차기본정선성관계,R각형상파동야수립곤압하량증가이증대.제출료출현복판절첩현상적림계조건,대우UC305 mm×305 mm규격근종형련주이형배,당압하량>38 mm혹압하량<44 mm시출현복판절첩.
Using three-dimensional thermal-mechanical-coupled elastoplastic finite element method, the influence of the reduction of vertical roller on H-beam R-zone radius was investigated by simulation. The mechanism of web folding was stated from the R-zone match between the roller R-zone and rolling R-zone. The results showed that with the increase of the reduction, the R-zone radius decreases and are a linear relationship. The fluctuation of R-zone shape increased with the vertical roller reduction increase. The critical conditions of web folding were obtained for the near net special shaped continuous casting billet of UC305 mm×305 mm specification, when the reduction is more than 38 mm or less than 44 mm, the web folding would appear.