US2365831A - Suspension of rolling mill rolls - Google Patents

Description

4 A. MOGILJANSKIJ 2,365,831

SUSPENSION OF ROLLING MILL ROLLS Filed Jan. 30, 1943 3 Sheets-Sheet 1 INVENTOR ANA TUL/J MOG/ZJ'ANS/K/J' Dec. 26, 1944.

A. MOGILJANSKIJ 2,365,831

SUSPENSION 0F ROLLING MILL ROLLS I 3 Sheets-Sheet 2 Filed Jan. 30, 1943 Q INVENTOR 1 ANA TOL/J MOGILJANSK/J Dec. 26, 1944.

A. MOGILJANSKIJ 2,365,831 I SUSPENSION 0F ROLLING MILL ROLLS Filed Jan. so, 1943 a Sheets-Shet s INVENTO'R ANA 701 /J MOG/LJANS/(IJ merly possible.

Patented Dec.26, 1944 I SUSPENSION F ROLLING MILL noLLs Anatolij Mogiljanskij, Bournemouth, England,- assignor to The Loewy Engineering Company Limited, London, England, a corporation of Great Britain Application J anuary 30, 1943, Serial No. 474,075

a In Great Britain October 4, 1941 e I 6Claims. (c1. ao-s si This invention refers. to the suspension or the top rolls of rolling mills and in particular to such rolls having a short lift as is the case with cold rolling mills and some types of hot mills.

The suspension of the top rolls with their "chocks is generally carried out in such a way that the suspension means can follow the movement or the screwdown spindles of the roll chocks and that, further, any clearance between those spindles and their nuts is eliminated in order to prevent jumping oi the rolls when a piece of ma.

terial is being fed to them. For this purpose,adjustable resilient members, which usually take the form of springs, form part of the top roll sus'- pension, the springs acting on .rods which are anchored to the mill housings and towhich the roll chocks are attached. 7

It is the main object or the invention to centralise the suspension means tor the top roll of a rolling mill, so that their adjustment can be effected from one point only. .In this way, the adjustment is simplified to a great extent and can be carried out'more quickly than was for- A further object of the invention is to provid a suspension which will equalise the pulls exerted on all suspension points of the chocks, in order to avoid any tilting and jamming 01' the latter.

It is a further object of the invention tov'provide a mechanism of the above type which is so located inside the rolling mill stand that it does not take up any additional space and which, fursize.

It is a still further object of the invention to provide a mechanism or the kind described which can be easily and qulcklydetached from the roll vation along the line I- -I, Fig. 2, showing the top part of the rolling mill stand equipped with the suspension mechanism according to the inventlon, Fig. 2 is a sectional elevation along the line II-II of Fig. 1 and Fig. 3 is a top plan view.

The rraine of the rolling. mill shown in the drawings consists of 'the two housings I and 2 withcho'cks 3 and 4 to support the top roll 5. The bottom roll of the millis not represented here thermore, permits the use of springs of unlimited;

25 onlevers l I.

the invention. Means are provided for vertically adjusting the chocks 3, [and thereby the top roll 5, in the form of screw-downs, of which only the threaded spindles a are shown here, the spindles being adapted to be lowered and raised through their rotation in any conventional manner by means of apparatus enclosed in the twopart cover 30.

' The mechanism for suspending the top roll 5' with which the invention is concerned will now be described in detail.

Each of the roll chocks 3 and 4 has two spaced-' :apartcast-on eyes I, through which crossbars 8 are'passed, so that one crossbar connects the two oppositely arranged eyes of the two chocks, as shown in Fig. 3. Each crossbar 8 is engaged between its ends by two rods 9, making four rods in all. The rods 8 are adiustably. uspended from parts III of bellcrank levers Ii by means of nuts 12. The levers II are pivoted on shafts l3 which are supported in open bearings l4, cast on to the insides of the housings I and 2 (Fig. 2.) Hinged to the bottom ends of the two oppositely arranged bell crank levers II by means of pivot pins l5 are casings It in which coiled springs Il are'housed. The springs ll abut with their ends against end walls of the casings l6 and with their outer ends against movable discs Ill. The two discs I 8 can be drawn inwards and the springs I'I thereby tensioned by means of a pull rod l9 and the handwheel 20 which has a threaded connection with this rod. By operating the hand-wheel 20, both springs will be adjusted at the same time so that the entire suspension mechanism can be adjusted in one single operation.

The whole design is symmetrically arranged in orderto 'divide the tension equallybetween all suspension points. I

In order to relieve the mechanism from the tension of the springs when changing the rolls, without having to interfere with the adjustmentv of the springs themselves, means are provided for spreading the levers H apart. These/means consist of a spindle 2| with a hand-wheel 22, the spindle having a threaded connectiomwith one of two bridge pieces 23 which enga e levers II by means of pivots 24 located in slots of brackets Rotation of hand-wheel" 22, will move the levers ll apart and therefore lower the rods 9 and accordingly the chocks 3 and l. The movement of chocks Sand 4 will stopwhen either the roll 5 touches the lower roll, or the chocks .3 and 4 come to rest on the lower chocks. The ,further as it is not necessary for the understanding res lowering of rods 9 then relieves crossbars 8 from the tension so that they can be easily pulled out. The suspension mechanism is then detached from the chocks and the latter, together with the roll, can be removed from the housings.

For the re-connection of the chocks with the suspension mechanism the crossbars 8 are put in place, and by means of turning hand-wheel 22 connections between the free ends of saidrods.

and said frame, and a single adjustable tensioning device for all rods, said tensioning device comprising a pair of spring members which are inserted between said levers with one spring member on each side of the vertical axial plane of said roll and a single means to adjust uni- V formly the pressure of each of said spring members so as to counteract the downward pull of said suspension rods.

2. In a rollingmill, a frame, a roll mounted in said frame so as to be vertically adjustable therein, bearing chocks for said roll in said frame, a pair of rods for suspending each chock from said frame, levers forming pivotal links'between the free ends of said rods and said frame, and an adjustable tensioning device for said rods and said frame, comprising a pair of springs which are so arranged between said levers that they counteract the downward pull of said rods, a casing for each of said springs pivotally attached to extensions of said levers beyond their own pivots tically adjustable therein, suspension rods for said chocks, symmetrically arranged at both sides of the vertical axial plane of said roll, a tensioning device, commonto all said rods, means for adjusting said tensioning device, and separate means for relieving said rods temporarily from the action of said tensioning device, said relieving means being operable independently from said adjusting means.

4. In a rolling mill, a frame, a roll mounted in said frame, bearing chocks for said roll arranged in windows of said frame so as to be vertically adjustable therein together with said roll, suspension rods for said chocks, symmetrically distributed over said chocks at both sides of the axial vertical plane of said roll, pivotal links between each rod and said frame, a tensioning device, common to all of said rods, and detachable cross-bars, each cross-bar connecting the rods at one side of the vertical axial plane to their respective chock, said cross-bars being passed through eyes arranged on the chocks and suspension rods respectively and fitting loosely in.

said eyes.

5. In a rolling mill, a frame, a roll mounted in said frame, said frame having two spaced-apart housings, bearing chocks for said roll, arranged in windows of said housings so as to be vertically adjustable therein together with said roll, rods for suspending each of said chocks from a housing, and adjustable tensioning means for said rods, comprising horizontal springs which are positioned in the space immediately above said roll and below the top of said housings.

6. In a rolling mill, a frame, a roll mounted in said frame so as to be vertically adjustable therein, bearing chocks for said roll, pairs of rods for suspending said chocks from said frame, means for pivotally connecting said rods with said frame, the two rods of one pair being symmetrically arranged at each side of the vertical axial plane of said roll, centrally arranged spring means common to all the suspension rods, casings for housing said spring means, said casings being pivotally attached to said connecting means, and means for adjusting the tension of said spring means.

ANATOLIJ MOGIIJANSKIJ.

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