Abstract:

The new scheme of the pipe-rolling unit with an automatic mill to obtain the seamless hot-rolled pipes, including consistently located cages of piercing mills, an automatic mill – tandem, rolling machines and calibration mills is offered. Cages of the piercing mills have barrel-shaped rolls in the deformation zone of which mandrels are disposed on the general rod of mandrels, respectively for the first and second rolling. The automatic mill of the unit also consists of consistently located cages, thus the first cage has horizontal and the second – vertical calibrated rolls in the zone of deformation where are located the short conic mandrels fixed on the general rod, respectively, for the first and second rolling. Cages of the piercing mills and an automatic mill are located on one line. After the automatic mill are installed two rolling machines and calibration mills.

Keywords: pipe-rolling unit; piercing mill; automatic mill; deformation zone; mandrel; rod.