| 摘要 |
PURPOSE:To lessen the variance of breadthwise thickness of web as much as possible by thinning both end areas of web of rolled stock than the middle area upstream the rolling process where the web width of rolled stock together with flange thickness are rolling reduced. CONSTITUTION:In a rolling system that the web of H-shape steel is adjusted to a target dimension by rolling reducing the inner width of web of rolled stock together with the flange thickness, the web thickness in the vicinity of the connected part to the flange is liable to be thicker than the thickness of the middle area. Thus, the rolling for making that region thinner than the middle area is executed by estimating the increase of thickness on both end areas of web upstream the rolling process where the inside width of web is rolling reduced. Therefore, the web thickness of the H-shape steel after finish rolling isn't varied in the width direction. |
