SU498977A1 - Working tool for longitudinal rolling mill - Google Patents

Description

one

The invention relates to pipe production, in particular to a working tool for a longitudinal rolling mill.

A working tool for a mill for longitudinal rolling of tubes is known, comprising at least two pairs of successively installed multi-caliber rolls with a constant ideal diameter and parallel axes, inclined at 45 ° to the horizon and at 90 ° to the axis of the neighboring pair. However, the specified tool does not provide multiline rolling with the location of the axes of all calibers in the same horizontal plane.

The proposed working tool for the longitudinal rolling mill is different from the fact that it has rolls of each pair, respectively, the number of gauges have steps that are made with kataiushas for each roll, their diameters increasing with increasing distance of the axis of the roll from the axial horizontal gauge plane. This ensures multi-rolling rolling with the location of the axes of all calibers in one horizontal plane.

FIG. 1 shows schematically the described working tool of one pair of rolls; in fig. 2 - the tool of another pair of rolls.

The tool contains two pairs of consecutive multi-caliber rolls with a constant ideal diameter (Di)

and parallel axes, inclined at 45 ° to the horizon and under 90 to the axis of the adjacent nara. The axis of the rolls can be inclined to the horizon and to the axis of the neighboring pair of rolls under

angles other than those specified depending on the specific conditions of rolling and calibration.

The rolls 1 and 2 of one pair of p. 3 and 4 of the other bunks have steps, which for each roll are made with rolling diameters (O /,), increasing as the distance of the axis of this roll increases from the axial horizontal plane A-A of the gauges. The pipe to be rolled is fed to

rolling into gauges 5 and 6 formed by the roll steps. Before the end of rolling in calibers 5 and 6, the tube is set to rolling in calibers 7 and 8. Thus, multi-unit truo rolling is carried out.

Claims (1)

Invention Formula A working tool for a mill for longitudinal rolling of tubes including at least two pairs of consecutively installed rolls with a constant ideal diameter and parallel axes inclined at 45 ° to the horizon and at 90 ° to the axis of the adjacent pair, characterized in that rolling with location axes of all calibers in one horizontal the planes, rolls of each pair, respectively, the number of calibers, have steps, which for each roll are made with rolling diameters increasing with increasing distance of the axis of this roll from the axial horizontal plane of calibers.