US2150248A

US2150248A - Rolling mill

Info

Publication number: US2150248A
Application number: US163453A
Authority: US
Inventors: Rosenbaum Kurt
Original assignee: Fried Krupp Grusonwerk AG
Current assignee: Fried Krupp Grusonwerk AG
Priority date: 1936-09-10
Filing date: 1937-09-11
Publication date: 1939-03-14
Anticipated expiration: 1956-03-14

Description

March 14, 1939. K. ROSENBAUM 2,159,248 I ROLLING MILL Filed Sept. 11,, 1937 2 Sheets-Sheet 1 11 M11! #6 H 5 Fig.1

uvvzrv TOR KURT ROSENBAUM ATTORNEY March 14, 1939;

ROSENBAUM ROLLING MILL Filed Sept. 11, 1937 2 Sheets-Sheet 2 ATTORNEY 5 means of standards,

135 quickly restored-into Patented Mar. 14, 1939 Kurt Rosenbaum, Friedrich Alfred-Butte, Ritchi hansen. German or to Fried. Krupp Grnsonwerk, Aktien-Gesellschait, Magdeburg- Buckau, Application September In Germany It has been common practice heretofore to erect rolling mills of that type,. which are used to advantage in the production of wire andsmall rods, on bed plates, bases or supporting tracks, on which the standards 01' the mill carrying the working rolls and the roll driving pinions are adjustably fixed in spaced relation toeach other.

However, notwithstanding the iact that the said standards are strongly made and amply proportioned so as to safely withstand the maximum tensional, bending and other stresses, to which they are subjected at work, oiten a rather high jumping of the working rolls occurs, during the roughing and like operations, a drawback, which is due to the heavy shocks re-occurring whenever a fresh piece oi work is fed for rapid reduction of its cross section into the passes of the rolls, and which sometimes results in breakage of vital parts of the roller bearings, wherein the working rolls of the mills are journalled. 7

Another drawback characteristic of rollingmills oi the type set forth consists therein, that the proper adjustment of the heavy standards referred to above, the exchange and re-alignment oi the rolls and like operations caused by changes in the rolling programme or attendant the re- I placement of .worn out rolls, are rather cumbersome tasks presenting many dimculties known to practitioners, which entail great loss of time and cause a relatively long and undesirable. in-' terruption of the workoi the rollingmill.

The principal object or this invention is to overcome the said drawbacks and dlfflculties by providing a structurally improved rolling mill of relatively simple and extremely sturdy construction affording facilities in removing and replacing the rolls.

One of the most important features of the invention consists in the provision of a housing oi inope unit a foundation or mill bed and an uplr' ight carrier irame, wherein the working rolls their driving gears are accommodated by so designed that they can .rmorefeasii'y. displaced, remove and replaced oiling n'iiils known heretofore, namely msnch her, that the rolls after having been withdrawn o 'epair, exchange etc. can be more proper position withare arrangedside by side and interconhigh rigidity representing at the same time and 11, 1937, Serial No. 163,453 September 10, 1938- (c1. so -55) out cumbersome aligninz, centering, re-adiusting and like time consuming operations.

Other advantages inherent to the improved mill housing consist therein, that its upper section is made in the f of a box, closed at all sides, a 5 structural teat e which adds to the rigidity of the housing, more especially since said box section is subdivided by partition walls into a plurality or chambers, and that these chambers can 1 "be used to advantage as storage tanks for cooling 10 water and lubricating oil.

Further objects 01' the invention will become incidentally apparent in the course of the following description to experts in the designing and working oi rolling mills. 1

. The nature and scope of this invention are briefly outlined in the appended claims and will J be more fully imderstood from the following speciiication taken together with the accompanying drawings, in which g Fig. 1 is' longitudinal section vertically taken through arolling mill re-designed according to this invention, and shbwn by way of an example;

Figs. 2 and 3 are cross sections vertically 'taken on lines 11-11 and III-III respectively through 25 the rolling mill shown in Fig. 1; I

Fig. 4 is another longitudinal section horizontally taken on line IV-IV through the rolling mill shown in Fig. 1;

through signed according to this invention, way of another example;

Figs. G m 8 are cross sections vertically taken on lines VI-VI, VII-VIL and VIII-N711 respectively through the rolling mill shown Li- Fig. 5.

The rolling mill ire-designed with the objects in view outlined above and shown in Figs. 1 to 4 comprises:

(1) Gear wheels or pinions Ill, ventional design geared together so as in opposite directions of which gear is rotated by a driving wheel l3; 1 (2) A set 0! grooved rolls 212i, 2! in "threehigh arrangement relatively to the gears i0, H [2, with which they are cooperatively connected by means of (3) Universal muii couplings, indicated at It, II, I! and 20', II, 22', and coupling spindles 39, Si, 32; the latter are yiel ly supported by 50 spindle carriers comprising roller bearingsv 30', ii", 32', and two

armed levers

33, 34, II;

(4) Standards ll, l2, l3, llopen at the top, wherein thegear wheels lil, ii, I! and rolls 20, 2|, 22 are iournalled by means oi; #4,,

to revolve wheel ii II, II oi. con- 2 v 2s, 26, shown in Fig. 3; pressure is applied to the rolls by means of screw'spindles 46, $7;

(5) A mill housing, which according to this invention is so designed and proportioned as to jointly enclose and support said standards, rolls,

gears, couplings and spindles.

In the embodiment of the invention shown by way of an example in Figs. 1-4 the mill housing is made in the form of a single steel casting, which comprises:

A base or foundation 50, pillars integral therewith designated 5i, 5!, 5I in Fig. 4, a rear wall. I

52 strengthened by ribs 52', 52", 53, 53", and a box like hollow upper section 54, which .is strengthened by partition walls and subdivided by the latter into a plurality of chambers or tanks i, m, n, o, 8 adapted for the reception and storage of cooling water and lubricating oil; water and oil are supplied therefrom through conventional distributing means diagrammatically indicated at 58, 58, 59, 59 to the rolls, gears and spindle carriers; the threaded portions of the

screw spindles

46, 41 are immersed in and lubricated by the oily various bearings concerned is collected in receptacles r, 1- formed in the base plate 50 for being re-conditioned and returned by a pump-not shownint the respective tanks of the upper section of the mill housing.

Wide windows are formed between the pillars SI, SI and through which the

standards

45, 42, 43, 44 are inserted and removed.

Guide elements diagrammatically indicated in Fig. 1 in the form of flat grooves or recesses are provided in the base plate 50 and the upper box section 54 of the mill housing for guiding. accommodating and retaining the standards 4i 42. 43. 4 in proper distance to each other.

After having placed the standards into their wormng position, the said openings between the pillars 5|, 5i, 5i" are closed by front'plates 51,

57', which are secured in their proper place by screw spindles and nuts designated 60. 66, SI iii in Figs. 2 and 4. The standards SI, #2, 43, 64 are in turn fixed in their proper positions by tapering keys I0, screw spindles II, and nuts I2-a's seen in Fig. 3, which is self explanatory. I

An opening 9 in'the front plate 51 and another opening h formed in the rear wall 52 .of the mill housing in registration with the former allow the material under treatment by the rolls 20, ii, 22 to pass into and out of the rolling mill described.

Another opening in the rear wall usually closed by a lid 11 and three apertures provided in the pillar 5| (Figs. 4 and 8) render the couplings,

\ spindles and their carriers referred to above readily} accessible.

'Adjusting means oft known design in the form of tapering keys I4, having screw spindles I5 and nuts I6 attached, may be provided to advantage for raising and lowering the working rolls according to working conditions, as seen in Fig. 3, which is otherwise self explanatory.

Books as indicated at 61 in-IEi'g. 2 may be formed to advantage at the front plates 51, 5? forfacilitating their removal and insertion by means of an overhead travelling crane or other convenient power operated hoisting means.

Various other changes and modifications may be conveniently made in the structural details, assemblage and cooperation of the various component parts of rolling mills-of the improved design described above, without substantially departing from the spirit and the salient ideas of this invention.

Rolling mills of the two-high type may be likewise re-designed to advantage according to this invention, namely provided with a unitary housing jointly enclosing and supporting all the working 'rolls, their standards, gears, couplings, and the other accessorial parts of the mill.

The rolling mill shown by way of another example in Figs. 5-8 comprises:

(1) Gear wheels or pinions H0, III, IE2 of conventional design geared together so as to revolve in opposite directions, of which gear III is keyed to a driving wheel H3;

(2) Two-sets of working rolls new and I22, Y

I 23 in two-high arrangement and in end to end disposition relatively to "the gear wheels I I0,

III, II2; said rolls and gears are cooperatively interconnected by means of (3) Flexible couplings diagrammatically indi- I22, I23" and coupling spindles I30, I3I, I32,

I I33; the latter are yieldingly supported by spin die carriers comprising roller bearings I, I30, I3I, I3I, I32 and-two armed levers I34, I35, I36, I37, I38;

(4) U-shaped standards I40, I4I', I42, I43, Md, M5, wherein the bearings indicated at I24, I25 in Fig: 6' and at I26, I2! in Fig. 7 for the aforesaid rolls and gear wheels are slidably mounted;

pressure is applied to the .working rolls in the usual way by means of screw spindles I 43, I41,

to the rolls, gears and coupling spindle carriers concerned; the threaded portions of the screw spindles I46, I21, I48, I43 are immersed in and lubricated by the oil contained in chambers i', i, n, n;'the respective water and oilchambers are interconnected by channels or ducts I 54, I55, I56 shown in Figs. 6, 7, 8 which are preferably formed in the 'steel casting proper; by pumps and a system 01. pipesnot shown-water and oil is supplied to the respective chambers. The cooling water running down over the rolls "I20, I2I, I22 is discharged through openings (1', d", provided in the base plate I50, while the lubricatingoil overflowing-from andpassing out of the various bearings concerned is collected in receptacles ,t, t, t" formed in the base plate I50 for being re-conditioned and returned by a pump and pipe 1ines-not-showninto the respective tanks of the upper section of the mill housing.

Wide windows are formed in the front wall I5 I I51, I51 which are secured in their proper place through which the standards I, I42, I42, I44, I45 are inserted and removed.

Guide elements diagrammatically indicated in working position, the windows in the front wall II referred to above are closed by cover plates by screw spindles and nuts designated I60, I60, WI, IGI' in' Figs. 6 and 7. The standards I, I42, I43, I44, I45 are in turn fixed in their proper position by tapering keys I10, I, I1I,I1I',having screw spindles and nutsattached as seen in Figs. 6 and 7, which are self-explanatory.

Openings 9, g" in the cover. plates I51, I51 and corresponding openings h, h formed in the rear wall I52 of the mill housing in registration with the former, and indicated by dotted lines in Figs. 6 and '7 allow the material under treatment by both sets of working rolls to pass into and out of the rolling mill described.

Another opening p in the rear wall I52 and three narrow apertures provided in the front wall I5I (Fig. 8) render the couplings, spindles and their carriers referred to above readily accessible.

Flanges shown at 5, 9' in Figs. 1, 4 and 5 may be formed to'advantage on mill housings oi the type described above with the object of providing a very rigid connection between a rolling mill redesigned according to this invention and a similarly designed flanged housing of a kindred rolling mill, or of an additional section to the master null, of which the rolls are to be driven .by those of the master mill through couplings and spindles, indicated in dotted lines at I9, III, I!" in Fig. 1 and at H9, H9, II9" in Fig. 5.

Analogously mill housings oi the type described and designed with the objects of this invention outlined above, which may prove in practice too cumbersome, heavy and risky to be cast in one piece. or too bulky ior being machined on the machine tools at disposal of the manufacturer,

'may be conveniently made in diflerent sections rigidly fixed together by screw bolts and flanges in the manner indicated by the flanged end portions of the mill housings shown in Figs. 1, 4 and 5.

What I claim is:

1. In a rolling mill or the type comprising working rolls superposed upon each other, gear wheels individually revolving said working rolls, standards wherein said rolls and gear-wheels are journalled, and coupling, spindles cooperatively interconnecting said rolls and gear wheels, an

integer mill housing jointly supporting, enclosing and removably retaining said rolls, standards, gear wheels and'coupling spindles,-horizontally disposed guide grooves being formed in the mill housing wherein said standards are slidably fixed so as to be. capable of being removed from the mill housing in the rolling direction.

2. In a rolling mill 0! the type comprising working rolls superposed upon each other, gear wheels individually revolving said working rolls, standards wherein said rolls and gear wheels are journalled, and coupling spindles cooperatively interconnecting said rolls and gear wheels, an integer mill housing jointly supporting, enclosing and removably retaining said rolls. standards, gear wheels and coupling spindles,horizontally disposed guide grooves being iormed in the mill housing wherein said standards are slidably fixed so as to be capable of being removed from the mill housing in the rolling direction-said mill housinghaving a hollow top portion strengthened by ribs, internally provided in the form 0! partition walls enclosing a plurality of chambers for the reception of lubricating and cooling liquids, said chambers being disposed in registration with the barrels and necks oi the working rolls, with the couplings and coupling spindles and with the necks and teeth of the gear wheels respectively.

KURT ROSENBAUM.