US1777921A - Mounting of furnace rolls - Google Patents

Description

E.' B, HUDSON oct. 7, 1930.

MOUNTING OF FURNACE ROLLS Filed OCJC. l5, 1928 2 Sheets-Sheet l @N ri Oct 7, 1930. E. B. HUDSON 1,777,921:v

' MOUNTING OF F'URNACE ROLLS 1 Filed Oct. l5, 1928 2 Sheets-Sheet. 2

"....Y'II r A gli Si A TTORNEY.

1f 9 wf? W Patented Qct:v 7, 1930 UNF-FEDl STATES PATENr oFFicE. l

EDWIN'B. HUDSON, or BUTLER, PENNsiLvANIA, Assrcrivoft 'ro 'rHii AMERICAN :ROLL- ING MILL COMPANY, OF MID LETowiLoHio, conromirroiv or oHIo MOUNTING; or FURNACE ROLLS `.i`ppiicatiml sied ocmber is, ieee." seriai' No. 312,376.

My invention applies primarily to j furnace procedure for sheets andvsliabs which is described and' claimed in a co-pending application of Marion S'. Amburgy, Serial No..

filed July 30,"192'8. As set forth therein', it has been found that when 'a mechf i anism for conducting iron or ,steel sheets'` continuous heat treating furnace comprises a. series of rolls whichl are main;

tained cold as distinguished on the one hand from merely cool enough' to prevent their softening, and on the other hand from uncooled vconveying devices of alloy material, a new result is produced. Insteadof picking up scalesof oxide from the sheets and depositing the collected material upon other sheets, producing pits and surface imperfections, the rolls after a short period` of use become highlypolislied, and sheets unusu-K ally free fromimperfections and with better Vsurfaces than hitherto obtainable are delivi ered. Further, the

difficulties due to the deterioration of alloy conveying devices, un-

`cooled rolls and the like, are eliminated; and there is no'sticking; j fMy invention relates to a-construction .and ,mounting'including a drive i t-which facilitates their use.

` lmust be 36.

for such rolls Since the rolls maintained cold, they are of hollow .construction with comparatively thin walls,

are vmoreA subject to deformation from' a for these reasons,lmeans j 'numberfof causes. than other rolls would be.

- :'llius if bumped by l bentg if for anywreason se' a heavy slab, they may be the fluid' cooling at the end of a run, the roll may become overheated and sag under its own weight. For these and other reasons ordinary bearings comprisingv journals. and stuffing boxes Athe. lines j The view of Figure 1 shows a horizontaly Also must preferably b e the easy and quick removal of rolls even' while do l`not give the lutmost satisfaction.

devised `for permitting interchange and I 45 thev furnace is operating; Further since,l these rolls. are preferably driven, means must be {providedfor 4this'end'which will permijJ the driving Yof therolls without binding in the. bearings even when warped, `and which will` not interfere `withnthe quick removal of rolls.

Mechanism forthese purposes must be provided which will notmaterially increase the cost of installation, since in long furnaces there are mlany rolls.4 l

Itis a furtherpobject ofgrriiy inventiony tol provide a mounting whichfrwillpermit the ready removal of rolls when damaged, which,

to this end is independent of the openings in the furnace'walls, and which includes an `easilydetachable drive.

It is still a furtheigobject of my invention i a construction 4which may be multo provide tiplied by the number of rolls'ina furnace without making the cost thereof prohibitive.

These and other objects of my invention,

which will be referred to hereinafter or willbe apparent to one reading this specification, I accomplish by that certain construction andlarrangeme'nt of parts of, which I shall now describe a preferred embodiment, reference being `made to the drawings forming-'a part hereof.

vFigure l is a general elevation, with some sectional parts, of a water-cooled roll5 installed in a furnace and showing my mounting including bearings and drive.

Figure 2 shows the connecting spindle and universale. f Figure 3 is an end View of a universal, cutting-the spindle transversely along the linesa-a in Figure 2.

n Figure 4 is an elevation of one of my bearings.

Figure 5 is a section therethroughalong b-b in Figure 4.

furnace in vertical section. The furnace has walls l and 2 `.which may be of suitable rer I fractory brickl or the like, and maybe supported andv braced' by I beams 3 and-,4. Metalliclsheets or-other shapes are to be heat treated bypassing them through this furnace upon a table -of water` cooled, cold.l rolls,

aligned horizontally, andspaced at suitable' intervals. The spacing may Vary with the articles to be treated andin accordance With Whether the rolls themselves are tof'convey the articles throu'gh the furnace. rolls neednot beso closetogether forA long strip or'V connected sheets as vfor Separate sheets, nor for large sheets as for small. Openings in the furnacevvall, which are prefand 6, permitthe passage of the rollsvtherethrough. V'

The rollsv comprise a roll body 7 which is hollow.' Through its center, and iterspaced from its Walls is as'econd smaller arrangement is such that this smaller or feed pipe 8. The

pipeextends beyond'one end of tlie roll, and through the roll nearly to its other end, which is closed. Cold Water enters through the' pipe 8, is' carried to the far end of the roll, and returns outside'of the pipe 8 to the entrance end Where it is' discharged. a counterloW/of the cooling and makes it'possibleto niaintain'the roll cold. The roll is a .plane cylinder in shape so that'there is no tendency to form steam f pockets.

AlL and 12 attached lto Il prefer and 4 as shown at 15.

The lroll is support-ed bybearings at either end, and in order that: the holes in the fur-f nace Wall `may be as small as possible, even for a possible warping of the rolls, to locate .them as closeto the furnace Walls as possible. Accordingly/,1I may mount' the bearings 9 and l0 -upon members foundations 1 3 and 14, and/or bolted tothe I beam braces 3 allowing preferably of the same type, with interv fa cross, encloses Vloosely the end of theroll `cross, and is fitted with I 8 to build 'up afbaclr v `the formation of steam-pockets. The roll is not larger at its driven end, which I have changeable parts, fully describe;

.The roll is driven through a spindle 16 from a source'oil power Whichinits immediate aspect may comprise ,a line shaft 17,

' I `shall hereinafter more bevelgears l8and1l9, andja drive shaft 2O.v

The drive shaft Will'be supported by suit-l able, bearings which; I have'indicated sy1nbolically at 20a and 20". The spindle '16 4connects the drive shaft 20 and the roll through universals '21 and 22, hereinafter more fully to be described. Atfthe other end of the roll, a header 23, which is preferably so as tofreceive the discharge of Water there-` from. It is connected by mea-ns of a union 24 tofa drain-'pipe 25.4 The supply pipe 8 extends through aplug an elboivf27 and a union 28. A; restrictive member 29 vmay lie Within the end ofI the'roll and about the pipe pressure* and prevent designated as 8a inA Figure 1,' than else'Wherel It maybe" made of lesser: diameter; here if desired; It is my. object'to provide 'such a universal `coupling .'22 as\.Will not increase Thus theA This produces Afluid .which ensures an even temperature a'crossthe roll,A

f the bushed e'nd of fthe bore 3l.

26v in theend ofthe the Water feed end r'(to the rightin Figure 11),. A new roll .nay

quickly be insertedA and 'made operative by a reversal of these steps, even while-the furnace isv i11use,'and` Without interrupting the travel of material therethrough' more than long enough to 'disconnect the universal. l

To this end, the type of universal coupling which I provide, is illustrated in detail in Figures v.2 and 3, and Will noW be .described ,The cylindrical -body- 30 is preferably'not larger in diameter than the roll itself so that it may be. Withdrawn therewith through the bearing 9. Itis bored transversely as at 3l and is slotted also as lat 32 the bore. The outer ends of the slot may be rounded o ifas at 33 and 33 to permit the play of the flat end of the spindle therein. The spindle 16, itself, has flattened ends and 3l which are adapted to' enter the'slots 32 and. 32?. -These endsare bushed with hemispherical blocks -35 and .35, which may be held to them by screw pins, countersunk bolts or thelike as will be readily 'undei'f stood. I prefer, however, to lempl-oy a pin 3S) passing through thespindle andfblocks, and iitting so loosely i-n a hole 392l inthe body 30 as not to interfere with the necessary play in the universal.v It Ayvill'be clear that` if the spindle is held central- -ly of the bore 3l, an effective ball and socket joint is formed. The flattened end .of-the spindle, however, riding through' the opeu- 'ing of the slot 32vwill cause the body 30 to rotate Withit. .Thus a `universal lioint-is provided. y The means for'holding the hushed spindle end centrally which may be held in place by a set screw- 3T. It is slotted as at. 3S .to accommodate the iattene'd'end of the s1 indle. Todemountthe .universal it is usually only necessary AtoY remove the set screw, slide baclrtlie cap, ref move pin 39 from hole 39 and slip the hushed spindle end out througlithe end orside of v But if the adjustment of thel drive is vsuch as not to permit this, the busli-v ing blocks may be unfast'ened from thespudleend, and the universal separated along its l axis. Thehole 39gives access-I. when the ca p is removed,to the place pins or other meansv for'fvastening the bushing blocks to the spin,- ldleend. S J 'j In a dispositioii of the apparatus as shown in the drawings, I prefer yto make the universal body designated as 30 vin partof the roll 7 at its closed end. I therefore provide -the body30 with a reduced'neck 40 Which may be placed inside' the end of the tubular member forming'the roll and 'Welded therein', thus, subserving this purpose, and rendering unnecessary any other means for of the bore is a cap 36 along theaxis of Figure 2 a' I 45 othercause into 'C5 aligning bearings on closing the end of the roll,4 The body 30a of the universal on the other end of the spindle (see Figure 2) may have a similar neck 40L so that it may be attached to the 4drive 5 shaft 2O with a collar.r Or insteadthe body may belelongated,

' and'fitted with al set screw as shown in Figure l at 41. Other me'ans may be taken to ,attach the universal bodies to drive shaft m and roll if desired.

The bearings are shown in detail in Figli.,

ures 4 and'. Th'ey comprise a base block 42 adapted'tol be attached by bolts 43 to the i foundation member 11. The-block is hol-v l-owcd out centrally as shown to clear the yoke, and-on either side its .upper surfaceis machinedas at'44. A yoke 45, having a bushing 46 is fitted' with trunnions 47. These trunnions ride in saddles/48 which have machined under surfaces, andfit against the surfaces 44, where they are kept from outward displacement-by ribs 49 which lie in corresponding grooves in the, base block. A4 keeper 50 with a ,centrall opening to clear saddle and trunnion is bolted to the base block. A grease box 51 has a lowersur-face to correspond with the bearing accommodates and is hollow within to hold lubricant, which may reach the roll 3o or shaft surface through a hole 52.' The grease box lies within the yoke lwhere it may be held by bolts 53; and it may be fitted "also with ears 54 for hinging in placca cover 55. v It willbe seen that the machined surface 44 of rthe'base block top is longer than the saddles 48, and that the opening in the keeper is also, longerin a horizontal direction than l the saddles.l Thus these are free to slide horizontallyso asto take care of any horizontal .bearing displacement, while the rocking of theyoke on the trunuions will takev carel of an vertical bearing displacement -Even 4 through the'roll be bent by a blower by some the shape of the dotted lines in Figure l, my bearings will still permit its free rotation and compensate for the misconnections between roll7 and drive shaft 20 i 50 including the spindle and nniversals, are to parting 4from the spirit of my" invention.

Having thus described myinvention, what I claim as new and desire to secure by Letters I y @ov Patent, is :-v

lfIn combination, a furnace, a hollow water cooled rolf` of constant diameter, ex-

, tending transversely through said furnacel and through holes in the Walls thereof, self'- the projecting ends of rotating said roll.

bored to receive the shaftV Wise lwithdrawal of said roll.

rotating said roll 7 or shaft which the' driving member,

.bearings adapted alignment. It will be understood that the said roll adjacent said holes, and means for 2. In combination, a' furnace, a hollow water cooled roll of constant diameter extending transversely through said furnace and through holes in the walls thereof, self-aligning bearings on the projecting ends of said roll adjacent said holes, and meansfor'rotat- 'ing'said roll, said'bearings adapted for endya hollow 3J In combination, a furnace,

ing bearings on the projecting ends ofsaid roll adjacent saidl ing said roll, said bearings wise withdrawal of said roll, saidmeans for roll comprising a spindle, a universal on` either end thereof connecting it respectively with said -roll and a source of readily separable.

water cooled rollof constant diameter extend ing transversely through said furnace and.

projecting at either side through'holes in the walls thereof, said lroll closed at one end by a driving member, separable driving means adaptedfor universal connection with said bearings on either end of said roll externally adjacent said holes, said bearings adapted for endwise withdrawal of said roll, said driving member being not greaterin diameter than said roll whereby it may be withdrawn therewith through said bearings. f'

5. In combination, a furnace, a `Ahollow water cooled roll of constant diameter extend` ing transversely. throughv said furnace and projecting at either walls thereof, said a driving member,

roll closed at one end by separable driving means adapted for universal connection lwith said driving member, bearings on either end of said roll externall adjacent said holes, said or'endwise withdrawal of said roll, said driving member being not greater in diameter than said roll whereby it may-be withdrawn therewith through said bearings, a feed pipe extending interior-ly of said roll to a point adjacent the closed end thereof and projecting from the other end,'a

header enclosing the open end of said roll,

unions for said header and said feed pipe, whereby said roll, feed,pipe, header and driving member-may be withdrawn as a unit,y

6. In combinatioma furnace, a hollowA water cooled roll of constant diameter extending transversely `through said furnace and projecting ,at either side through holes inthe walls thereof, said roll closedat one end by a driving member, separabledriving means adapted for universal connection lwith said driving member, bearings -on holes, and means for rotatj adapted for end-` power, at least one of said universels being watercooled roll of constant diameter extendfing transversely throjigh said furnace and 'through holes in the walls thereof, self-align- 1.05' side through holes inthe either end of said roll externally adjacent said holes, said bearings adapted for endwise withdrawal of said roll, said driving member being not greater in diameter than said roll whereby it may be withdrawn therewith through said bearings,a feed pipeextending interiorlyof said roll to a point adjacent the closed end thereof and' projecting from the other end, a header enclosing the -open endv of said roll, unions for-said header and said feed. pipe, whereby said roll, feed pipe, header and driving member may be withdrawn as a unit, a restriction about said feed pipe adjacent theopen end o f said roll wherebya head of fluid may be maintained in said roll.

In combination, a furnace,y a hollow water cooled .roll of constant 'diameter eX- tending transversely through said furnace and projecting at either side through holesl V in the walls thereof, said roll closed` at one on said yoke,

of said roll vexternally 'interiorly of said roll to 'a 'end by Va driving member, separable driving means adapted for universal connection with said driving member, bearings on either end. of said. roll externally adjacent said holes,` said bearings adapted for` endwise withdrawal Aof said roll, said-driving member being not. greater in diameter than s aid roll whereby it .may be withdrawn therewith throughl said bearings, a feed pipe eX- tending interiorly of said roll to a pointadjacent theclosed end thereof and projecting from the other end, a header enclosing the-open` end ofsaid roll, unions for said lieader and said feed feed pipe, lieaderand driving member .may be withdrawn asa unit, said bearings comprising a sleeve bushing a yoke, trunnions a base member with oscillat` ing saddles supporting said .'trunnions, whereby said 'bearings may compensate for warping of theroll.

8. In combination, water cooled roll of constant diameter eX- tending transversely through said furnace and projecting at either side through lholes in the walls thereof, said, roll closed at. one end bya driving member, separable-driving means adapted for universal connection with saidv driving member, bearings on either end adjacent said holes, said bearings adapted drawal of said roll, said drivingmember being not greater in diameter than said roll whereby it may bev withdrawn therewith through said bearings, a feed pipeextending point adjacent the closed end thereof and p r the other end, a headen enclosing Athe open end of .said,roll, unions forsaid header and said feed pipe, whereby said roll, feed pipe, header and driving member may be withdrawn as a unit, said bearings`comprising a sleeve bushing in a yoke, trunmonson said yoke,l a base member with,oscillatingsadpipe, whereby said roll,

a furnace, a hollow` for endwise with?y ojecting from dles said whereby.

Supporting said I trunnions,

warping bearings may compensate for a spindle-ada ywith said' drivlng member and with 'a source 4of powerfsaid universal connection being severable.v .I

9. In, combinatioma furnace a hollow watercooledroll of constantdiameter eirtending transversely through said furnace and projectin at either side throu h in the walls t ereof, said roll closed at oneend by' a driving member, 'separable driving means adapted for universal connection with said .driving of vsa'id roll externally adjacentv ,said holes, s aidl bearings adapted Vfor endwise with- -d`rawa1of said roll, said driving member being mmf-greater indiameter than said roll whereby through said bearings, `ing interiorly 'of said roll to a' point adjacentthe closed end vthereof and projecting from the 4other end, a header enclosing4 the open` vend of said roll, unions for said header and said feed' pipe, whereby said roll, feed pipe', header `and driving member. may be 4 withdrawn as a -unit, said-bearingscomprising a sleeve bushing-in a yoke, t-runnions ron saidyoke, a base member withl oscillatin f saddles supporting said ,trunnions', whereby said 4bearings may compensate .for warping of the roll, said driving means comprising a, bore and slot in said driving member, a spindle with flatened -endadaptedto enter said slot and bore, a ball and socket bushing on the flattened-'end of said spindle, and a ca p forholding saidfspindle'endand bushing in said driving member, and a universal' connection for the other end of said spindle to a 'source of power.

10, In, combination,` a furnace, a hollow Iwaterf-cooled r'oll o'f-'constant diameter-extending transversely 'through said furnace and. through holes in the walls thereof, self aligning bearings on the projecting ends of -said roll externally' adj acent said holes, Asaid bearings comprising a base member,` blocks supported thereon', and having horizontal play, a vyoke havingtrunnions, 4said trunnions mounted in said blocks, a lower bearing member in the -base of said yoke, anupper bearing member aiding in said yoke and having a portion to contact said roll, a hollow internal vportion to serve as a reservoir for lubricants, and `acommunicating' pas'- sage'between said two portions, and means fortiansmitting power vto said roll, said means being of such size 'as to be withdrawable withfsaidvroll throughI said bearings. EDWIN B. HUDSON holes member, bearings on either endg ges

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