SU1731306A1 - Rolling mill stand group - Google Patents

Abstract

Use: rolling long metal. SUMMARY OF THE INVENTION: The housing extends along a groove. The drive ends of the shafts are disconnected. In the extreme left position, the housing is rotated 180 °. in the horizontal plane and moves to the right before connecting to the drive. The rolling axis remains constant, but the gauges change. The same is done with vertical crates. But the movement and rotation are carried out in a vertical plane, 4 sludge.

Description

The invention relates to the processing of metals by pressure, and more specifically to the rolling of section bars and rod, in particular, from billets coming from continuous metal casting plants on continuous longitudinal rolling mills. Such continuous mills consist of one or more separate groups of work stands, differing in their purpose (draft, finishing, intermediate groups).

Known groups of stands, designed, in particular, for rolling varietal profiles and wire rods, equipped with a drive, including a stationary pedestal with mounted cases on which work rolls are mounted, mounted on shafts with supports. Three rolls are placed in each case of the stand: one horizontally, the other two at an angle of 60 ° to it.

The disadvantage of this design is the presence of one gauge brook on the work rolls. When worn, a gauge stream requires dismantling of the stand and dismantling of the work roll.

A swath with a caliber produced is going to be repaired or remelted, and a new swath is installed in its place. In order to double the life of the work roll, a second groove of a caliber is cut into it, with rolling being rolled in one line, i.e. one gauge is working, the other is spare.

Known groups of stands, horizontal and vertical, designed, in particular, for rolling varietal profiles and rods, equipped with a drive, including a stationary pedestal, on which the working stands of the stands with the drive gears of the work rolls located in them and two work rolls cantilever mounted on shafts with supports. On the work rolls cut two stream caliber. As the working groove of gauge deteriorates, the roll shifts axially until the replacement gauge brook coincides with the rolling axis.

The disadvantage of this design is the need to reconfigure the entire body.

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stands when changing gauges, as well as disassembling the roll unit, which significantly increases the time for changing the gauge and, consequently, reduces productivity.

The closest to the technical essence of the invention is the group of horizontal and vertical stands of the continuous mill of the Cox company. The group, equipped with a drive, contains a stationary pedestal on which the bodies of working stands are installed with working rolls located in them fixed on shafts with supports. The supports are located on both sides of the work rolls. There are two calibers on the work rolls. When one of the calibers is worn, the stand, for example, is horizontal turned by 180 ° and is set to the position of the next stand, respectively vertical, i.e. no movement of the roll in the main direction is required.

The disadvantages of this technical solution are the increased accuracy of the seats under the hulls of the working stands on the fixed pedestal to ensure the interchangeability of the entire set of stands; the need to rearrange the entire set of stands when worn caliber in one stand, which requires additional time; the presence on the work rolls of one stand of two sizes of calibers, which requires additional reconfiguration of the boring machine when they are cut.

The aim of the invention is to increase productivity and reduce equipment cost by simplifying setup due to the possibility of changing the gauge without axial movement of the work roll and without changing the position of the stand in the mill.

The goal is achieved by setting up a group of working stands, horizontal and vertical, including a drive, a stationary pedestal with mounted stands with interleaved spacings, in which work rolls with two gauge grooves are placed on shafts with supports. In this case, according to the invention, the drive ends of the shafts are made symmetrically on both sides of the roll, axles are mounted on the outer surface of the stand bodies along the symmetry axis of the case parallel to the symmetry axis of the gauge, and parallel grooves are made in the stationary pedestal in which the horizontal stands stand.

Such a constructive solution allows changing the caliber without disassembling the roll stand of the working stand and without changing

the position of the stand in the group requiring the movement of all the stands of the group.

Figure 1 shows the group of stands in the plan; figure 2 - section aa in figure 1; on

fig.Z - section BB in figure 1; figure 4 is a view In figure 1.

The rolling mill stand group has a drive 1, a fixed pedestal 2 with 3 working stands installed on it with predetermined inter-hulk spacings, in which work rolls 5 with two gauge grooves are placed on shafts 4 with supports. The drive ends of the G and D shaft 4 is made symmetrically on both sides of

5 rolls. Trunnions 6 are mounted along the symmetry axis of the casing 3 parallel to the symmetry axis of the caliber on the outer side of the cage cases. In the fixed pedestal 2 there are parallel grooves E in which

0 enters the trunnion b horizontal stands. The horizontal stands are moved along the pedestal by means of an electric motor 7 on a trolley moving along the pedestal along the rail 8. Non-working

5, the drive end of the shaft 4 is covered with a protective casing 9. The stands are fixed in the working position in the guides 10 and 11 with screws 12 on the brackets 13 mounted on

0 case 3.

In the specific case, a group of four stands alternating according to the scheme is horizontal-vertical.

With cell spacing not

5 less than the width of the stand body, the change in caliber can be carried out in the working position (the centers of the calibers of all the stands are on the rolling axis). In this case, the horizontal stand turns on

0 180 ° around the axis of the trunnion entering the notch of the fixed pedestal, and is fixed in this position. The vertical stand rises above the pedestal with, for example, an overhead crane, two slings

5 of which end in a loop and fit onto the trunnions of the casing body, then rotate 180 ° in slings relative to the axis of the trunnions, fit into the mill line and fix.

0 At inter-cage distances smaller than the width of the stand body with trunnions, the caliber is changed in a similar way in the so-called stationary pedestal removal zone (the centers of the caliber are

5 from the rolling axis at a distance greater than the width of the stand), where the stands are advanced by means of, for example, an electric motor 7.

The use of the proposed technical solution in comparison with the prototype allows to increase productivity

the expense of reducing downtime to replace the brook caliber in the cage.

The installation of the proposed group of stands also reduces the cost of manufacturing equipment for cutting equipment by cutting the same gauge on the work roll, which does not require additional reconfiguration of the boring machine.

In addition, with the use of the invention, there is no requirement for particularly high accuracy to the base surfaces of the working stands housings, since when changing the gauge stream the position of the stand in the mill does not change and the interchangeability of the horizontal and vertical stands is not required, which also reduces the cost of equipment manufacturing.

Claims (1)

The invention The group of rolling mill stands, horizontal and vertical, includes a drive, a stationary pedestal with u stands mounted on it with predetermined intercellular spaces of stands of stands, in which work rolls with two calibres of rolls are placed on shafts with supports, t is with what increase productivity and reduce equipment cost by simplifying adjustment, the drive ends of the shafts are made symmetrically on both sides of the roll, on the outer surface of the bodies stands on the axis of symmetry of the body, parallel to the axis of symmetry of the caliber, are mounted pins, and in a stationary pedestal parallel grooves are made for the pins of the housings of horizontal stands. 1 j U n Mr. J 3 four D -LR /, G-Ј && 77 // / rrjssr ™, L j -; t, t 11 „Cqq Š - -;; - fi iCp, 4 - (ir |. I) ,: SiSSi l} -Tf, , Li .. i r j.rSB, ti u with ::. C U-4-U -i: 1 -W Hi-- c I , & -7T77. J i W Wl lsj   pilsLr js | s -ll-, j. if .-c) i; j 4 2 Fi th I1 u -A. ; § sl. N-C .§ & ij4 IV B-b rrl I fo.l About / x / iHi ui gata frr (Г-j -1 r- Pu-J i -t, L-j D UCti CLMfr & npiJU camera 3 four D 4-U -i: 1 Hi. J i W Wl lsj f pilsLr js | s -ll-, j. if -c) , 1 G :, re R .: r, J1i / Fi th I1 u -A. J ; § sl. N-C .§ & ij4 IV NZ- iHi ui D I T i Fig .. 2 j i f .. F PT Fi4