SU749473A1 - Set of work and support rolls with carriages - Google Patents

Description

(54) SET OF WORKING AND SUPPORT ROLLS WITH PILLOWS

one

The invention relates to the processing of metals by pressure, in particular to rolling equipment, and can be used for hot sheet rolling.

A set of work and support rolls with pillows of hot rolling rolling stands, such as quarto, with curved guides for moving the work rolls relative to the support rolls in the horizontal plane 1 are known.

This movement eliminates the mutual misalignment of the working and support rolls and the axial forces arising during this, then only when rolling in one direction.

In order to reduce the axial forces acting on the rolls during reverse rolling, the curvilinear guides of the rolls of one roll are made with different signs of curvature, and are convex to the plane of the axes of the set.

FIG. 1 shows the lower support roll assembly with pillows, plan; in fig. 2 is a cross-section of the lower working cushions and a roll sill of a vertical plane; on fig.Z-5 schemes self roll, reducing axial force.

The set of rolls with pillows consists of four pillows I with support rolls 2. Horizontal planes 3 pillows 1, facing the pillows 4 work rolls 5, have grooves 6 with radii R. The grooves 6 of the supports of the support roll 2 have a curvature of different sign and are convex to the plane set axles. The surfaces of the cushions 4 working rolls 10, facing the pliers 1 of their support rolls, are provided with cylindrical protrusions 7 that can move in the grooves 6.

The device works as follows.

With a mutual misalignment of the axis KL; worker

15 of the roll and the MN of the support roll 2 during the rolling process, axial forces F occur as perceived by the bearings of support 2 and the work roll 4. The magnitude of the axial forces F depends on the angle (f skew roll axes, coefficient

20 friction between the rolls, the radii of the rolls, the efforts of the mutual pressure rolls. The direction of action of axial forces depends on the direction of skew of the rolls and the direction of rolling.

In the described device, the cushion 4 (see Fig. 1 and 2) of the work rolls under the action of axial force F is displaced depending on the rolling direction to one side or the other, the slide with protrusion 7 along curviline grooves 6. planes, reducing the mutual misalignment of the axes of the rolls, which is accompanied by a decrease in axial force.

The self-alignment of the work rolls is carried out to balance the reducing friction force from the setting of F by the amount of frictional forces on the contacting surfaces of the work pillows and support rolls, since the axial force caused by the mutual distortion in terms of rolls can be neglected during hot rolling of the sheet.

Invention Formula

A set of working and support rolls with cushions of predominantly hot rolling rolling mill stand with curvilinear guides for moving the work rolls relative to the support rolls in a horizontal plane, characterized in that, in order to reduce axial forces acting on the rolls during reversing rolling, curved guide cushions one roll is made with different signs of curvature and curved to the plane of the axes of the boiler set.

Sources of information,

taken into account during the examination 1. USSR copyright certificate for application No. 2355422/02, cl. B 21 B 31/02, 1976.

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Claims (1)

A set of work rolls and backup rolls with pillows of predominantly hot-rolled sheet metal adhesive 5 with curved guides for moving work rolls relative to the backup rolls in the horizontal plane, characterized in that, in order to reduce the axial forces acting on the rolls during reverse rolling, the curved guide pillows one roll made with different signs of curvature and convex to the plane of the axes of the set.