Sms Innse S.p.a.

Marco Ghisolfi

Vincenzo Palma

Guido Emilio Zanella

Paolo Marin

Jacopo Grassino

Alberto Vittorio Maria Bregante

Alberto Vittorio Bregante

The invention relates to a pipe rolling plantcomprising a rotary piercer, a treatment stationand a main rolling mill. The rotary piercer and the treatment station are arranged so that the pierced blankleaving them is arranged with the irregular tailfacing the main rolling milland with the regular headfacing the mandrel. The invention also relates to a rolling millcomprising a plurality of rolling stations, each station comprising a plurality of rolling rolls, the radial position h of which is adjustable. The rolling mill also comprises a control circuit for calculating and/or measuring the distance d between the axes of rotation r of the rolls and the trailing edgeof the pipe. The control circuit is also designed to displace the rolling rolls radially towards the outside of the pipe in each rolling stationwhen the distance d assumes a predetermined value d.

Rolling plant, rolling mill and rolling method

The present invention relates to a system and method for rolling a seamless tube. The plant comprises a main rolling mill with adjustable rolls for mandrel-rolling a semi-finished tube. The plant also comprises a fixed-roll extracting/reducing mill positioned downstream of the main rolling mill. The extracting/reducing mill is designed to extract the semi-finished tube from the mandrel and reduce its diameter to a predetermined value close to that desired for the finished tube. Finally, the plant comprises a adjustable-roll sizing mill. The sizing mill is positioned downstream of the extracting/reducing mill. This sizing mill is designed to adjust the radial position of the rolls and define the diameter of the outgoing tube.

Tube rolling plant

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Muggiò, Italy

Marco Ghisolfi