SU660739A1 - Method of rolling steel strips - Google Patents

Description

(54) METHOD FOR ROLLING STEEL STRIPS

I

The invention relates to rolling production, in particular to the technology of rolling strips in coils.

There is a method of rolling steel strips, including winding strips rolled into a multilayer roll, its unwinding, the task of the strips in the rolling mill and their joint deformation followed by winding into a roll 1J.

The disadvantage of this method is the absence of off-spec rolled products due to the difference in the lengths of the wound strips.

The purpose of the invention is to reduce the amount of substandard steel.

For this, the winding of a multi-layer coil is made from strips of the same length, and before the task of the strips to the mill are input. the ends are combined.

 The method, for example, double-layer rolling, is implemented as follows.

The rolled strip of the same length is wound into a multilayer roll (for example, measuring the length of each strip during winding and cutting off their ends in order to ensure equal lengths), is fed to the rolling mill and installed on the unwinder (unwinding from the top). Due to the winding of a multilayer roll of strips of the same length, their input ends do not coincide, therefore, before the task of the bands to the mill, their input ends are aligned. In this case, a reserve of the lower strip is formed, which is necessary to ensure the simultaneous entry of the back ends of the strips into the rolling stock at the end of the unwinding of the multilayer roll.

The rolling method was tested on a laboratory 2pO cold rolling mill (quarto) at the rolling department of the Institute of Ferrous Metallurgy. Experimental rolling of two strips superimposed on each other, previously wound in a two-layer roll, was carried out. - ALATERAL strips of steel 08 kp, section of each O, 4 × 100 mm, diameter of the initial ru-. Lona 800 mm, internal 400 mm. The bands were trimmed by 20%. Loop-type tensioning devices of cargo type. The process was conducted with the looping of the lower band. - Results are satisfactory.

Claims (1)

Invention Formula The method of rolling steel strips, including the winding of strips - PodKata in mnogo66073§ J. . four layer roll, its unwinding, the task of the task bands into the mill, their input ends in the rolling mill and their joint de-align, the formation with the subsequent winding into a roll, characterized in that, with the aim of diminishing the number of substandard prokan-mania in the examination of that, the winding of the multi-layer roll pierced-1. Chern to S.N. and Karasevich V.I. Produced from strips of the same length, and in front of foil. M., 1957, p. 38-98, 153-157.