| 摘要 |
PURPOSE:To roll down a material without forming overlap flaws by specifying the taper angle, effective depth, bottom width, radius of curvature of bottom bulging, the height of the bulging, the corner radius in the bottom part, and the corner radius in the outlet of caliber rolls. CONSTITUTION:A caliber roll is regulated to have 14-15 deg. taper angle theta of a caliber, -(35-40)+20lnX(mm.) (ln is a natural logarithm, X is a broadside rolling reduction) effective depth (l) of the caliber, the bottom part width W of the caliber, the initial thickness of a rolled material + (20-30)(mm.), 2,000-2,500mm. radius rho of curvature of bottom bulging, 3-5mm. height H of the bulging, 30- 40mm. corner radius r1 in the bottom part of the caliber, and 30-40mm. corner radius r2 in the outlet of the caliber. If the steel material is rolled down broadside by using such caliber rolls, the formation of overlap flaws is prevented and the time for rolling is reduced. |
