MANUFACTURE OF WIDE FLANGE SHAPE WITHOUT WEB WAVE
PURPOSE:To manufacture a wide flange shape without web wave by cooling flanges so that difference in the mean temp. of flanges from the mean temp. of a web is lower than the limit temp. difference that is shown by a prescribed equation at the time of starting natural cooling after finish rolling. CO...
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Main Authors | , , , , |
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Format | Patent |
Language | English |
Published |
21.06.1994
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Edition | 5 |
Subjects | |
Online Access | Get full text |
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Summary: | PURPOSE:To manufacture a wide flange shape without web wave by cooling flanges so that difference in the mean temp. of flanges from the mean temp. of a web is lower than the limit temp. difference that is shown by a prescribed equation at the time of starting natural cooling after finish rolling. CONSTITUTION:The flanges 1 of the wide flange shape are cooled only at the time of rolling and, at this time, the flanges 1 are cooled so that the difference in the mean temp. of flanges 1 from the mean temp. of the web 2 is lower than DELTATa that is shown by the prescribed equation at the time of stating natural cooling after finish rolling. Where, sigmacr=Min[3.6E(Tw/Hw) sigmaY], Aw, Af: cross- sectional area of web and flange, E: Young's modulus at the room temp., tw: thickness of web, Hw: inside width of web, sigmaY: yield stress of web at the room temp., DELTATa: temp. ( deg.C). In this way, the bending of the web 2 after cooling is prevented. And, at the time of rolling, after finish rolling or at the time of rolling and after finish rolling, water cooling of flange is executed using a flange cooling device 3. |
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Bibliography: | Application Number: JP19910036076 |