| 摘要 |
<p>PURPOSE:To raise the rate of repletion into a groove and to improve the yield of nondefective products by more exactly estimating the amount of reduction of flange width due to rolling down a web. CONSTITUTION:This method for rough rolling a wide flange shape is a method by which a rolled stock is roughly rolled into a wide flange shape having a web and flanges with a breakdown mill having a pair of upper and lower rolls 5 on which grooves 6, 7, 8 are formed, the degree of repletion of the rolled stock into the groove 8 is estimated by use of a flange groove width ratio (1- B/A) from a rate of the entire width A of the groove to the width B of a part equivalent to the flanges of the rolled stock and the flange width is forming rolled from the rolled stock by rolling down the web.</p> |
