| 摘要 |
PURPOSE:To keep the stem height and flange thickness of a rolling material constant by controlling a roll gap in immediate response to the variation of dimensions of the end part of material, in edging the material at the time of rolling a T-beam from a slab. CONSTITUTION:In edging a slab 1 between the rolls 2, 3 having prescribed calibered-bottoms, and rolling the stem part of slab 1 between the rolls 5, 6 having forming calibers by turning sideways the slab 1 at an intermediate stage or a finishing one, to manufacture a rough shaped billet; in edging an intermediate blank material 10 between upper and lower rolls 13, a roll gap C is windened at the head part 10T of material 10 and is successively narrowed in sequence to obtain a fixed roll gap at its intermediate part, and then is widened again at the tail part 10B of material 10. Further, the adjusting amount of roll gap and the adjusting length are controlled basing on the estimated amount of dimensional variation of the rolling material. In this way, the height of stem and thickness of flange of the rough shaped billet are surely made uniform. |
