RU2463119C1 - Mill stand - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: mill stand comprises forming rolls, bearings, through pads, dead pads and adjusting screws. Mill stand rigidity in direction perpendicular to rolling direction is ensured by providing said stand with bearing plates with rolled strip passages, holes for bolts to fasten roll pads and adjusting screw supports to said plates and vertical cutouts for roll pads to displace therein. Note here that roll dead pads are provided with hollow nuts to adjust roll axial displacement and accommodate bearing thrust assemblies to retain rolls in axial adjustment.

EFFECT: reduced torsion of rolled stock.

4 dwg

Description

The invention relates to the field of rolling production and can be used in the design of rolling mills for the production of long products and bent profiles.

Known working stands of a rolling mill, consisting of a bed, rolling rolls, pillows, bearings and a pressing device (see Korolev AA Design and calculation of machines and mechanisms of rolling rolls. M: Metallurgy, 1969, pp. 100-169).

A significant drawback of the described construction is the high material consumption of the working stand and the high financial costs for the manufacture of beds.

Also known is the design of the working stand (prototype), consisting of rolling rolls, pillows, bearings, a pressing device, studs connecting pillows (see A.S. 697218, m.cl. 2 B21B 37/08, publ. 15.11.79 g ., bull. No. 42).

The disadvantage of the design of the working stand, taken as a prototype, is the low rigidity in the plane perpendicular to the rolling line, and the axial adjustment of the rolls.

An object of the invention is to increase the rigidity of the working stand in the direction perpendicular to the rolling line.

The technical problem is solved due to the fact that there are bearing plates with windows for passing the rolled strip, with holes for bolts, attaching roll cushions and pressure screw supports to them, and with vertical slots for moving roll cushions, while the blind roll cushions are hollow nuts to control the axial movement of the rolls, and inside the hollow nuts are bearing assemblies for holding the rolls during their axial adjustment.

The invention is illustrated in the figure, on which:

Figure 1 is a schematic representation of a General view of the working stand;

Figure 2 is a top view of the working stand;

Figure 3 is a side view of the working stand;

4 is a schematic illustration of a cushion with a nut for axial adjustment of the rolls.

The working stand (Fig. 1) consists of bearing plates 1 and 2 (Fig. 2), in which there is a window 3, for passing the rolled strip 4. The passage cushion 5 and the deaf cushion 6 (Fig. 2) are attached to the bearing plates 1 and 2 by bolts 7. The rolling rollers 8 are placed in bearings 9, which are supported by bushings 5 and blind pillows 6. The gap between the rolling rollers 8 is adjusted by pressure screws 10 located in bearings 11, fixed to the bearing plates 1 and 2 by bolts 12.

In the carrier plates 1 and 2 there are grooves 13 (Fig. 3) to ensure vertical movement of the passage cushion 5 and the blind pad 6 when adjusting the gap between the rolling rolls 8 when rolling strip 4.

The deaf pillows 6 are provided with a hollow nut 14 for adjusting the axial movement of the rolls by the value “Δ”, the bearing thrust unit 15 is fixed with nuts 16 to absorb axial load.

The proposed working stand is as follows. When the rolled strip 4 is captured by the rolling rollers 8, the force arising from this through the bearings 9, the passage cushions 5, the blind cushions 6 and the bolts 7 is perceived by the bearing plates 1 and 2. The gap between the rolling rollers 8 is regulated by the compression screws 10. The rolled strip 4 passes through window 3. Axial adjustment of the rolling rolls 8, within the value of Δ, is carried out by rotating the hollow nut 14, and the rolling roll 8 is held by a thrust bearing assembly 15 fixed by the nuts 16. When moving the hollow nut 14 by a certain amount Inu "Δ" in the axial direction the rolling roll 8 is also moved.

The proposed working stand has high rigidity in the plane of the transverse rolling line, which allows to reduce the longitudinal twisting of the strip and to improve the quality of the finished product.

Claims (1)

The working stand of the rolling mill for the production of long products and bent sections, including rolling rolls, bearings, feedthrough pillows, blind pillows, pressure screws, characterized in that it has bearing plates with windows for passing the rolled strip, with holes for bolts that attach to them cushions of rolls and supports of pressure screws, and with vertical slots for moving cushions of rolls, while blind cushions of rolls are provided with hollow nuts for regulating axial movement of rolls, and inside hollow nuts are placed There are bearing thrust units for holding the rolls during their axial regulation.

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