Study on the thickness precision of rolled sheets

압연판의 두께 정밀도에 관한 연구

In the research of the rolling of strip, producing the strip with a close tolerance of thickness over the rolling direction was a principal object. But it was solved by the contribution of two-dimensional theory of rolling and the development of automatic gauge control system. And new requirements for the study of flatness, crown of rolled strip and edge drop grow up recently. These phenomena are closely related with the thickness distribution along the lateral direction of rolled strip. To analyse the thickness distribution of rolled strip along the lateral direction, elastic deformation of rolls and plastic deformation of work material must be discussed simultaneously. In this report, an approximate three-dimensional analysis based on Tozawa's three dimensional approach was applied to 12 cases of different rolling conditions and the numerical results were investigated. Especially stresses were laid upon the investigation of optimal boundary position between the three-dimensional analysis region and the plane strain analysis region.

본 연구에서는 Tozawa의 이와 같은 근사적 3차원 해석법을 검토하여 그 특징 을 살피고 판나비, 판두께, 압하율의 변화가 삼차원변형역과 평면변형역의 최적 경계 면 위치에 미치는 영향을 고찰하고자 한다.