PREPARATION for firmware and subsequent rolling on a two STANE helical rolling in the sleeve-blank dimensions 650 × 500VN. × 3250-3650 MM FOR THEIR conversion into machined pipe size 610 × 36,53 × 3150-3550 mm of steel grade FOR 15X5M COMMUNICATIONS refineries With the geometric dimensions of increasing the accuracy of

摘要

The blank for firmware and follow-rollers on a two-roll mill helical rolling in the sleeve-blank size 650 × 500vn. 3250-3650 mm × redistribution them machined tubes size 610 × 36.53 mm × 3150-3550 15X5M steels for communications refineries with geometric dimensions of high accuracy, having a cylindrical shape with profiled ends in the form of convex spherical surfaces and the axial drilling diameter 100 ± 5,0 mm, characterized in that the blank with the bottom end is in the form of spherical in ypukloy surface dlineL = 0,12L ± 15, with a diameter at tortsaD = 0,92D ± 5,0, the outer surface of the workpiece is associated with an end diameter radiusomR = 0,93R ± 5,0, and with the end of shrinkage on dlineL = 0, 08L ± 10, with a diameter at tortsaD 0,97D = ± 5.0, the outer surface of the workpiece is associated with an end diameter radiusomR = 0,96R ± 5.0, where L = 1630 ± 50 - the length of the workpiece, mm; D = 630 ± 10 - workpiece diameter, mm; R = 310 ± 5 - preform radius, mm.