Разработка математической модели нового процесса продольной прокатки труб

Abstract

The variant of the pipe production technology improvement on pipe-mill aggregate 140 at the "Sinarskiy tube-rolling mill" ltd. is offered. It is focused on the development of all the continuous casting ingot range. The pipe form changing at rolling-off in a machine mill "tandem" at a short roll mandrel by a rough tube preliminarily ovalized with vertical rollers located in front of a longitudinal rolling mill №1 is studied. The change regularities of the nondimensional parameters characterized deformation of metal in angle of sides depending on the rough tube ovalized coefficient is identified. The ability to decrease the amount of waste at a "hairline" defect and increase a reduction ratio at the machine mill "tandem" by a rough tube preliminarily ovalized with vertical rollers is researched. The vertical rollers calibration method and drafting schedules that allow to cut the strap sizes formed at rolling in a longitudinal rolling mill.