US1360959A

US1360959A - Rolling-mill with supported working rolls

Info

Publication number: US1360959A
Application number: US139404A
Authority: US
Inventors: Kriwan Arnold
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-06-04
Filing date: 1916-12-28
Publication date: 1920-11-30
Anticipated expiration: 1937-11-30
Also published as: GB102057A; FR513317A; DE311142C

Description

I A. KRIWAN.

ROLLING MILL WITH SUPPORTED WORKING ROLLS.

APPLICATION FILED DEC|Z8, I916.

Patented Nov. 30, 1920;

5 SHEETS-SHEET h .ZFwerzZZr A. KRIWAN. ROLLING-MILL WITH SUPPORTED WORKING ROLLS. APPLICATION FILED DEC-28, l9l6.

1,360,959. Patented Nov. 30, 1920.

5 SHEETSSHEET 2- A. KRIWAN.

ROLLING MILL WITH SUPPORTED WORKING ROLLS.

- APPLICATION FILED DEC-28. 1916.

1,360,959. Patented Nov. 30,

' Jnvpnlor .flrzzold 115i wast KRIWAN.

R0 LL| NG MI SUPPORTED WORKING ROLLS. APPLICAT DN FILED DEC-28, 1916.

1,360,959. Patented Nov. 30, 1920..

' 5 SSSSSSSSS EH 4- 7 Jul/ 07x231,

\i'if J2 ololffrcwaw, j 8 y K Caz 2 A. KRIWAN.

ROLLING MILL WITH SUPPORTED WORKING ROLLS.

APPLICATION FILED DEC.2B, 1916- 1,360,959, Patented Nov. 30, 1920.

5 SHEETS-SHEET 5- 3 L 69210 ZdLIz'o' UNITEDQSTATES ARNOLD KRIWAN; or nemnitnozar, NEAR BERLIN, GERMANY,

ROLLING-MILL WITH SUPPORTED WORKING ROLLS.

Specification of Letters Patent. Patent d N 30 19 Application filed December 28, 1916. Serial No. 139,404.

To all whom it may concern:

Be it known that I, ARNOLD KRIWAN, en-

gineer, a subject of the Emperor of Austria,

residing at 7 4 Schwerinstrasse, Mariendorf, near Berlin, in the German Empire, have invented certain new and useful Improvements in Rolling-Mills with Supported Working Rolls; and I do hereby declare the following to be a full, clear,'and exact description of the invention.

.My invention relates more particularly to .that class of rolling mills for the enlongation of material in which the working rolls are supported.

In rolling mills which are chiefly used for the drawing out of the material to be rolled,

the diameter of the rolls should be as small as possible, because experience has shown that rolls of small diameter produce great elongation ofthe material to be rolled. These rolls of small diameter, however, show, under the counter-pressure of the material to-be rolled, a conslderable sagging or deflection and must therefore be supported.

' For this purpose it has previously been v proposed to adopt supporting rolls extending over the, entire length of the working rolls and running inbearings in the housings; or supporting rails resting on the working rolls and undergoing a shifting motion while the. rolls are revolving. The known supporting rolls are applicable only for plain working rolls, and not for rolls having various diameters on their longitudinal extent. In addition to this, there occur very strong pressures and frictional strains in the necks of the supporting rolls, so that special cooling arrangements have to be provided. 7

When making use of supporting rails, the working length is limited by the length of the rails and, moreover, elaborate arrangements for supporting and guiding the rails become necessary.

My invention has for its object to eliminate the defects of these known arrangements and to provide for an effective cooling of the working. rolls. According to my invention ringsare used as supports for the working rolls of small diameter, such rings revolving around fixed axles held by the housing frame, preferably by the insertion of balls or rollers between the rings and the axles. V

In the accompanying drawings I show'various forms of a rolling mill constructed in accordance with my invention.

Figure is a vertical longitudinal section of a two-high rollin m'll with five difierent sizes of passes, and Iig. 2 is a front view of the same mill in which one of the frames is omitted.

F1g. 3 is asimilarview of a rolling mill with supportmg rings on both sides of the worklng roll.

Figs. 4 and 5 are views of a three-high rolllng mill; Fig. 4* is a diagrammatic new indlcatlng the eccentric mounting of the rings b. F 1gs. 6 and 7 are views showing details and Fig. 8 shows a rolling mill with a coolm arrangement A I eferring to the drawings a working roll a of small diameter is supported at the working portionsby rings 1), which by the insertion of balls 0 or rollers, revolve freely on fixed axles d held byZthe frame e.

The supporting rings 6 are of a very large diameter; in relation to the diameter of the working rolls a. The rolls and rings can revolvefreely, whereby a great savmg in I rso power is effected.

Instead of arranging the supporting rings 1n an exactly vertical position above or below the working rolls, they may be arranged laterally in such a position as to receive the pressure on the working roll and in a man-, ner similarto that already known in connec- .tion' with supporting rolls. By such an arrangement the tendency of the working rolls to creep up theface of the supporting rings is revented.

f the rolling mill always works in one -directlon only, one "supporting ring arranged laterally in such a position .as to receive the pressure on the roll or oneset of supporting rings for each workinglroll arranged this manner is suificient. f, however, the roll- 1ng m1ll works alternately indifferent directlons, supporting rings can be arranged onboth sides of the working froll'as shown- 'in Figs. 3and 4.

In a three-high rolling to support the central working roll by the collars on the other working rolls. The central working roll is thus supported in a very el'ficient manner, even when the stress "is uneven- The stress becomes uneven on account of the fact that on the commencement of the rolling process, only the first pass is occupied, while the other passes are only gradually occupied one after the other. The supporting rolls can be madenon-c'ircular in sectional form, so as to obtain varis r I I mill, it is possible easy to ous thicknesses in onepass. In this manner,

fashioned parts may be rolled.

As the position, which the supporting rings take with relation to the working rolls must be exactly adjusted according to the work in handand be altered if necessary, the normally fixed axles d of the supporting rings may be arranged in the housings in an adjustable manner.

Figs. 6 and 7 represent an example of such an adjusting arrangement. The axle d is laterally adjustable in its bearing part 7 by means of screws g. The bearing part f which is guided at k may further assume a different position in height by a lateral shifting of 'the wedge piece 1.

The veryconsiderable reduction in the diameter-of the working rolls in consequence of the use of the supports described makes it possible to cool them from the inside, and further, as the pressure on the bearings is very much reduced, to introduce a cooling liquid through the bearin s of the rolls. Hitherto, this was not possi 1e, as the cooling liquids in question could not be introduced into the'bearings in view of the high pressure on same and the high temperature.

Fig. 8 shows the cooling arrangement in which the cooling liquid is fed through pipe k intoan annular'space Z in the bearing m and then enters, through one or several holes in the neck, the From the bearing hand end of the liquid passes to the interior of the roll through the hole 1 and travels lengthwise of the roll through passage n to the opposite end thereof at whichv point it passes out through hole l to the bearing at this end and is led thence through pi ing Z to the bearing of the" roll above. ere it enters through hole I the interior passage n of this roll and travels in opposite direction therethrough to the other end' of this roll of one roll, e. g. the right where hole 1 communicates with the bearing above that of the lower roll at which the liquid enters through pipe is. The liquid may be. led away through suitable piping,-possibly connected to a chamber communicating with the passage n On the right hand side of Fig. 8 the roll end is shown bored from its outer end. The end opening of this bore will normally be closed by aplug to prevent the escape of cooling fluid. y? this arrangement, it is obtain such a circulation of the cooling liquid through the rolls, necks andb'earings as will meet requirements, and thus obtain eflicient cooling.

Two or more rolls may be cooled in the manner described.

It has previously been ease of rolling mills, to cool the "rolls, their hollow space n of the rollf lower roll in Fig. 8, the' from the upper roll proposed, in the necks and bearings. The known arrangements for internal or external cooling, however, did not satisfactorily answer the requirements, as the feeding of the cooling liquid to the rolls and necksunder great pressure did not assure a sufiicient cooling. These defects have been eliminated in the arrangement above described.

I claim:

[1. In a rolling mill, a working roll and a 1 supporting ring therefor, said ring rotating on a fixed axis parallel ing roll.

to that of the workworkin said ring rotating that of the work- 2. In a rolling mill, a supporting ring therefor, on a fixed axis parallel to ,ing roll, together w1th anti-friction bearings between said ring and its fixed axis.

3. In a rolling mill, a plurality of stepped working rolls having a series of passes'of diiferent dimensions, and cooperating supporting collars on said rolls arranged between the passes.

4. In a rolling .mill, a plurality of stepped working rolls having a series of passes of diflerent dimensions, and cooperating supporting collars on said rolls arranged between the passes, together with supporting rings rotating on fixed axes parallel to those ofthe rolls and bearing agalnst'the top and bottom working rolls, for the purpose described.

5. In a rolling mill having more than two stepped working rolls with a series of passes ofdiflt'erent dimensions, a working roll having a supporting collar arranged between adjacent passes, and a cooperating collar on the adjacent intermediate roll.. I

6. In a rolling mill having more than two stepped working rolls with a series of passes of different dimensions, a working roll having a supporting collar arranged between adjacent passes, and a cooperating collar on the adjacent intermediate roll, together with a supporting ring bearing against said working roll'and rotating on a fixed axis parallel to-that of the working roll.

roll and a 7.,In a rolling mill having more than two stepped working rolls with a series of passes of different dimensions, a working roll having a supporting collar arranged between adjacent passes, and a cooperating collar on the adjacent intermediate roll, together with a supporting ring bearing against said work- .ing roll and rotating on a fixed axis parallel