US2213714A - Rolling mill - Google Patents

Description

Sept. 3, 1940. D. L. MEKEEL ET m. 2,213,714

ROLLING MILL Fi1ed Aug. 21, 1935 4 Sheets-Shea? 2 I lnuehior 8 David L. mekeel y Jdmes H. Caglor Attorney p 1940- D. L. MEKEEL El AL 2,213,714

ROLLING MILL Filed Aug. 21, 1933 4 Sheets-Sheet 3 4 3 r 0 35 7 A i r A 39 lnu-erdors David Lmekeel James Cqylor p 3, n. 1.. MEKEEL i-.-r AL 2,213,714

ROLLING MILL Filed Aug. 21, 1933 4 Sheets-Sheet 4 lnu'enior's David L. mekeel 10. 95 H. Caylor %%w;

Aiiorney Patented Sept. .3 1940,

; UNITED STATES 2,213,714 ROLLING MILL David L. Mekeel, Coraopolis, and .lamesH. Caylor, Pittsburgh, Pa... assignors to Morgan Construction Company, Worcester,

of Massachusetts Mass., a corporation Application August 21, 1933, Serial No. 686,004 31 Claims. (o1. soq-su) The present invention'relates in one of its phases to rolling'mills of the type employing vertical rolls, either alone or in conjunction with adjacent horizontal rolls, for the rolling of bars or like metal stock.

One of the objects of the invention is to provide a vertical roll stand characterized by the arrangement of the rolls, pinions and housings in a unit assembly adapted formovement vertically, so that any of the roll passes can be brought to the elevation of the pass line without disturbing the relation of the assembled parts. The invention further contemplates the utilization of this vertical roll stand in interposed relation to horizontal roll stands, the latter having provision for'iadjustment-horizontally; as'a result of such combined adjustments, it is possibleto maintain the samepass line, both vertically'and horizontally, through the mill.

Another object of the invention is'tofiprovide for a maximum amount of vertical adjustment of the roll guides to cover the range of roll passes, with convenient means for enabling the operator to raise, or lower,- the guides.

A further object of the invention is to provide, vfor rolls having formed pass grooves, an improved thrust bearing construction which enables'the grooves to, be accurately alined, and at the same time permits adjustment of the rolls toward and from each other.

Otherandfurther objects and advantages of the invention will hereinafter more fully appear from the-following detailed description thereof, taken .in connection with the accompanying drawings, in which:

Fig. 1 is-a plan'view of a portion of a rolling 7 mill employing a vertical roll stand embodying the invention, in conjunction with adjacent horizontal roll stands.

Fig. 2 isa view in side elevation of a portion of the parts ofFig. 1, certain portions being shown in section. a

Fig. 3 is an ,enlarged view partially in elevation and partially in vertical section along the line3-3 ofFig.2.- v

Fig. 4is a fragmentary view in front elevation showing the construction of the guide adjusting device on a still larger scale.

Fig. 5 is a view in side elevation of the parts shown in Fig. 4.

,Fig. 6 is a plan view of the vertical roll stand, with parts broken away to show further details I of the guide' adjusting mechanism. v

Fig. '7 i a vertical sectional view along the line stand of vertical rolls I, stands of horizontal rolls 2, 2.

' suitable gearing 9. Thus each horizontal roll pass is shiftable horizontally with respect to the ver- 20 cage 92, within which The cage l2 carrying assemblies slidably supported on suitable vertical 30 guides or' ways sembly, as-described above, so that vertical move- In order to vertically ment of the cage [2, the latter is adapted to be 4 1-1 of Fig. 6, looking in the direction of the arrows. I

Fig. 8 is a fragmentary view of a portion of the parts of Fig. '7, as viewed fromthe left. I

Like reference characters refer to like parts in 5 the different figures.

Referring first to Figs. 1 and 2, the invention is shown in connection with a mill consisting of a l interposed between roll stands are of usual construction, each stand being driven by a motor, not shown, through gearing 3 and a shaft ll coupled at 5 to the driving motor. As best shown at the right in Fig. 1, in which the roll shafts i are broken away, a frame 6 supporting both the roll and gear housings is shiftablein a horizontal plane by means of a screw shaft '5 driven by a motor 8 through tical roll pass.

Referring now to Figs. 2 and 3, the rolls 1 of the vertical stand are mounted within a housing generally designated by the reference character it, the housing it) being mounted on a platform 25' The platform H is in turn supported by a is mounted a housing l3 enclosing the pinions I t for driving the rolls Iv. the roll and pinion housing l5 and I6 of the fixed framework or foundation, and is thus capable of being raised or lowered with respect to said fixed support; to permit of'these adjustments, the drive for the pinions, i4 is provided by a shaft I! which, being '35 connected to and extending downwardly from one of. the pinions I4 is driven from a horizontal shaft it through gearing l9 and a sliding key connection 20.

- As previously pointed templates the arrangement of the rolls, pinions and housings 'of the vertical stand in a unit as-.-

l2 can be ments of the cage utilized to properly position any vertical roll pass with respect to the 4 horizontal rolls 2, without in any way disturbing the relation between the rolls I and pinions I. move the cage l2 carrying the'roll and pinion housing assemblies, screw shafts 2! are provided on opposite sides of .the q cage, the shafts 2| being driven in unison through worm wheels 22' in mesh with suitable worms, not shown, carried on' a motor driven shaft 23. After vertical adjustment of the mils l by move-" The horizontal 10 out, the invention con- 4 locked in position by any suitable 'means, such for example as a doublewedging arrangement generally indicated by the reference character 24 above the broken away portion of the right hand screw shaft 2|. The details of this wedging arrangement form no part of the present invention, the wedging arrangement being fully shown and described in the Sheperdson, Morgan and OMalley Patent No. 2,083,100, dated June a, 1937.

For the purposes of the present application, suffice it to say that the wedging arrangement 24 normally locks the cage l2 in vertical position, a screw shaft 25 being provided for unlocking-and locking the wedges cooperating with the right hand way I6, in advance of and following vertical adjustment of the cage l2 by meansaof the shaft 23.

Referring again to Figs. 1 and 2, it is evident from the foregoing that in setting up the mill for operation, the horizontal rolls 2 can be accurately adjusted in a horizontal plane to properly aline any pass thereof. with respect to the vertical rolls i by adjustment of the frames 6 through screw shafts 1; on the other hand, the rolls I can be adjusted in avertical plane to properly aline any pass thereof" with a selected pass of j v the horizontal rolls by means of the screw shafts 2| shifting the cage l2 carrying the'roll unit assembly. These related adjustments, therefore, provide means for always maintaining the pass line through the mill at a constant height above the mill floor! As indicated above, the invention also contemplates the provision of means whereby the receiving and delivery guides cooperating with the vertical rolls l may-be readily adjusted to cover the full range of pass locations on the rolls I, and this arrangement is best shown in Figs; 4 and 5. The receiving and delivery guides 26 and 21 are mounted on guide bars 28 and 29, respectively, each guide bar extending across the space between the vertical legs 18a of the roll housing I 0. Thedelivery guide bar 28 shown in Fig. 4

.is slidable onsuitable vertical ways 30, 38 carried shafts, ,3! to turn in unison.

by the roll housing legs "la, and is vertically movable with respect to the rolls I, i bymeans of -screw shafts 3l received in threaded engage- The cross shaft 33 extending across the housing, l0 above the rolls I, see Fig. 6, rotationof the shaft 33 by a suitable hand wheel 34 causing'the screw hand wheel 34 is therefore adapted to raise, or

lower, the'guide bar 29 and the delivery guide- 21 carriedthereby, it being obvious from Fig. 4

that the vertical ran'geof movement of theguide bar 29 is equal to the range of passes on the rolls I.

. Following an adjustment of the guide bar 28 to aline the guide 21'with a selected roll pass,'the

.bar 29 islocked in'arsaosition on the ways 38 by means of clamp bol 35, 'the bolts being recelv= able-in vertical slots 36 provided in the ways 38. Upon loosening theclamp bolts 35, the welghtoi' the guide bar and guide is borne by" the screw shafts 3l,"so that the guide 21 can be adjustedvery accurately with respect to a roll pass by means of the hand wheel 34. The guide barj28 carrying the receiving guide 26 is mounted on the rear of the roll housing It in substantially the same manner as the guide bar 29, at hand. wheel,

, 3'! mounted on a crossshaft 38 serving to screw shafts '39, in unison, to raise,.or lower he bar 20. Clamp bolts 49 lock the bar- 2s in test be screwed into the opening 4|.

Rotation of the r the guides 26 and 21 in conjunction with vertical adjustments of the roll and housing unit in order to keep the pass line in the established horizontal plane.

Referring now to Figs. 6, land 8, there is. shown in detail an improved thrust bearing for one of the vertical rolls 1, whereby the end thrust of the roll is taken in both directions by a bearing structure adjustable in such a manner as to always insure proper registration of the pass grooves on both rolls I To this end, the upper roll neck Ia provides a central opening 4| in which is secured one end of a heavy stud 42 provided with an angular enlargement 43 whereby the stud may The stud 42 further provides a shoulder 44 on which is seated the lower portion of a sleeve 45 extending upwardly around the stud 42 and held in engagement with the shoulder, 44 by means of a nut 45 and washer 41 cooperating with the upper threadedend portion of the stud. The sleeve 45 is, also secured to the stud 42 for rotation therewith by means of a key 481 The sleeve 45 provides a shoulder 49 on which is seated a thrust ring 50, and the ring 50 is held in engagement with the shoulder 49 by means of a collar 5| and a nut 52 cooperating with ex-- ternal threads on the sleeve 45. With the parts assembled as described above, the -t st ring 50 is substantially part of the stud and associated roll, and so is adapted to transmit the axial thrust of the roll to the anti-friction bearing members which will next be described.

Theupper and lower annular faces of the thrust ring 58 are engaged by a series of rollers 53 and 54 respectively, the rollers being held in position by suitable races 55 and 56 enclosed within a housing 51 which forms a bearing holder arranged to carry the whole thrust hearing assembly. The housing 51 provides diametrically opposed wings 58 whereby it is supported, each wing 58 providing as shown in Fig. 8, helically formed faces held between correspondingly formed stationary guides 59a and 59b. The lower guide 59b is formed integrally with a bracket 60 anchored to 'the roll housing by bolts 6| received in slots 6la, see Fig. 6, the slots 6la being utilized to center the housing 51 withthe roll stud when setting up the bearing.- The bracket 66 in turn carries a clamp 62, which serves to hold in place the upper guide 59a, with bolts 63 securing .the clamp 62 to the bracket 68. With the construction described thus far, it-is apparent that the entire weight of the'roll'l, as well as the axial thrust of the roll in either direction, will beborne by the sets of rollers 53. and 54 co-' operating with the thrust ring 58 and that the entire roll stud and bearing assembly is'carried by the housing 51. And since the housing 51 is rotatablysupported between the pairs of helical assemblycarried thereb For the purpose of turning the housing 51 and so obtaining vertical adjustment of the: ro1l,'a

radially extending flange 51a of the housing car.-

ries a worm gear segment 84, as best shown in Fig. 6. The segment 64 is in'mesh with a worm 65 mounted on-a shaft 66 rotatably supported in bearings 61 mounted on. the bracket'ili, and the end of the shaft 66 provides a tool receiving portion 68. By turning the shaft 66, the worm 65 is adapted to impart angular movement to the housing 51 through the segment 64, and this angular 'movement is in turn transformed into axial movement of the roll assembly through the cooperation of the helical wings 58 with the guides 59a and 582). Therefore, the left hand roll I can be adjusted vertically'toaccurately register its pass grooves with the grooves of the vertically fixed right hand roll, any such adjustment being maintained by the locking action between the engaged w'orm 65 and worm gear segment 64.

The above described thrust bearing assembly is adaptable either to vertical rolls or to horizontal rolls. When used on. one roll of a pair of cooperating rolls having formed pass grooves, it provides the'means for a close endwise adjustment and positioning of the associated roll, so as 1 of adjusting screws 69, can

to obtain and maintain accurate registry of the selected pass grooves of said rolls. Moreover, its use involves no interference with such radial adjustments of the associated roll as may be required from time to time to change its spacing, relative to the other roll. Such radial adjustments obtained (see Figs. 3 and'G) by operation be made, without disturbing or affecting the thrust bearing adjustment, because of the provision of suitable clearare non-concentric'to ances, as shown in Fig. '7, between the collar 5| and the upper bearing race 55, between the thrust ring 50 and the inner wall of housing 51, and.

between the sleeve 45 and the lower bearing race.

56,-this permitting the roll and its attached parts to occupy and to operate in positions which the housing 51 and its attached parts Referringto Fig. 7,

it will be noted that the arrangement of parts is such that removal of the nut 46 permits the roll stud 42 to be withdrawn by downward vertical movement of the roll, and a new roll with a similar stud substituted there' for. Obviously, this substitution of one-roll for another can 'be carried out without in any way disturbing the previous adjustment of the bearing assembly, so that no time is lost in making adjustments after changing. the rolls stand. v

As best shown' in Fig. 3, the radial or sleeve bearings for the necks of the left hand roll I are held in position against horizontal movement by the adjusting screws 69, and the lower neck bearthe barrel of the rolls by means of a counterbalancing arrangement consisting of a lever 19' and spring II. This counter-balancing arrangement forms no part of the present invention; being fully described and claimed in the aforesaid Sheperdson, Morgan and OMalley patent. Consequently, vertical adjustment of the entire roll and thrust bearing assembly in no way disturbs the adjustment of the roll neck bearings. As also described in the aforesaid patent, the right 0 h vertical and radial thrust by roll neck bearings. secured to the housing stantially fixed with respect to the vertically adjustable left hand roll.

In setting up for operation a mill employing a vertical roll stand embodying the present invention, the left hand roll is initially adjusted endwise by means of the thrust to bring the several pass grooves on the two rolls in exact registration. The roll pinion and housing unit is then raised, or lowered as desired, to

is preceded, or followed, by lateral thereby in proper alinement ofthe vertical I0, so that the right hand roll I is subbearing assembly bring the selected roll pass to the elevation of the pass line through the mill, which adjustment,

the horizontal roll stands to bring the selected horizontal passes into alinement with the interposed vertical pass. After this, the receiving and delivery guide bars 28 and 29 are raised, or lowered, to bring the guides 26 and 21 carried with the previously established pass line.

We claim,

1. A rolling mill comprising in combination, a set of rolls, power transmission for said rolls adjustment of comprising intermeshing pinions, spindles and couplings between said rolls and pinions, a housing for rotatably supporting said rolls, a housing containing said power transmission, a cage movable between vertical ways for supporting both the roll and power transmission housings, with the roll housing on the top and the transmission housing within said cage and means for moving saidv cage to shift the roll andpower transmission assembly, as a unit.

2. A rolling mill comprising set of rolls, power transmission for said rolls between said rolls and pinions, a housing for rotatably supporting said rolls, a housing containing said power transmission, a cage movable in vertical waysfor supporting the roll and power transmission housings, with the roll housing on the top and the transmission housing within said cage, means for moving said cage to shift the roll and power transmission assemblies as a unit, and means for locking said cage in position between the ways with aselected pass of said rolls at the level of the pass line of the mill. 3. In a rolling mill, the combination with a pair of rolls rotatably' supported about vertical in combination, a

comprising intermeshing pinions, spindles and .cquplings axes and a guide cooperatingwith said rolls, of

bar at its ends to position said guide in alinement with a selected roll pass.

4. In a rolling mill, a vertical roll, a housing surrounding the upper end portion of said roll and bearings carried by said housing for re- ,ceiving the axial thrust of said roll in opposite directions, said housing being turnable angularly, .and means for converting angular movement of said housing into axial movement of the roll assembly.- J

5. In a rolling mill, a vertical roll providing an upwardly extending stud, a sleeve mounted on said stud and 'a vertically adjustable thrust bearing assembly for supporting. said roll through said sleeve, said roll being removable axially from said sleeve and thrust bearing assembly without disturbing thevertical adjustment of the same. Q 6. In a rolling mill, a platform located at substantialiy the floor level of the mounted onthe top of said platform for rotatably, supporting a pair of vertical rolls, a cage movable between vertical ways below the level of themiil floor for supporting said platform, power transmission for said rollswithin said cage, comprising intermeshing pinions, spindles and couplings between said rolls and pinions and a housing for said transmission suspended from said cage, said platform, cage and housings tomill, a housing g'ether with said rolls and power transmission being vertically movable as a unit.

7. In a rolling mill, a vertical roll providing an upwardly extending stud, a sleeve removably mounted on said stud andcarrying a thrust ring,

' 15 sleeve, bearings carried by saidhousing cooperating with said thrust ring for supporting the. weight of said roll as well as for taking its axial thrust in both directions, means for turning said housing angularly, and means for converting angular movement of said housing into axial movement of*the sleeve androll assembly.

9. In a rolling mill, the combination with a vertical roll stand movable vertically, as a unit, to position a selected pass at the pass line of the mill, of receiving and delivery guides for the rolls of the stand, horizontal bars carrying said' guides, with each guide supported at its ends by screw shafts, gearing connecting each pair of screw shafts for a bar and hand wheels operble from the same side of the roll stand for operating said gearing to raise. and lower each guide supporting bar with respect to the es-f tablished pass line.

- them, means for moving said housing and power 10. In a rolling mill, a housing, a roll mounted for rotation'about a verticalaxis, a bearing holder rotatably mounted on said housing, a thrust bearing in said holder for supportingfthe roll, means for rotating the holder and means for converting rotary movement of the holder into axial movement of the roll.

11.'A rolling mill comprising a vertically adjustable rollhousing, a pair of vertically disposed rolls mountedin said housing, a power transmission below said roll housing and'rigidly secured thereto, said power transmission being connected to the lower ends of said rolls to drive transmission vertically as a unit and driving I means mounted on a fixed base and connected ment of. said roll relative to to said power transmission by 'a shaft adapted to permit relative mc'fvement'without disturbing the driving connection. a

'12. In a. rolling mill including a mill housing,

rolls rotatably mounted in radial be'aringstherein, and means or adjusting the spacing of therolls,'thecombination with one of the rolls of adjustable thrust resisting mechanism for resisting-axial thrust upon said roll and adjusting 'the position of the roll axially, and meansholding said 'mechanism against movement. relative to the mill housing, said mechanism providing the necessary clearance to permit radial movethe mill housing incident to adjustment of .the spacing of the rolls.

13, A rolling .mill including'mill housings, rolls having at least one formed pass rotatably mount-'- ed in the-mill housings, at least one of/the rolls having substantially cylindrical necks'and .an-

extension on one of the necks providingopposed end thrust receiving surfaces and means for adjusting the spacing of, said rolls, radial bearings for the cylindrical necks carried by, the ni'ill housings, opposed thrust bearings cooperating with said thrust receiving surfaces and aflording uflicient radial clearance to permit movement of the rolls incident to adjustment of the spacing of'the rolls, and adjustable supporting means for ceiving surfaces and means for adjustingthe l0 spacing of the rolls, the combination with said roll neck extension of adjustable means fixed to the mill housing for positioning the roll axially relative to the mill, said means comprising thrust bearings cooperating with the opposed 1 end thrust receiving surfaces and affording sufficient radial clearance to permit movement of said roll incident to adjustment of the spacing of the rolls. s x 15. In a rolling mill including a mill housing, 20

rolls rotatably mounted in radial bearings there'- in, at least one of the rolls having a roll neck extension providing a radial flange with opposed end thrust receiving surfaces, and means bination with said roll neck extension of adjustable means fixed to the mill housing for' positioning the roll axially relative to the milLsaid means comprising antifriction thrust bearings cooperating with the opposed end thrust. receiv- 30 ing surfaces on .said flange and slidable radially on .said flange during rotation of the roll neck extension so as to provide the necessary clearance permitting adjustment of the rolls in the mill toward and from each other.

16.- In a rolling mill including a mill housing, rolls rotatably mounted in radial bearings therein, at least one of the rolls having a roll neck extension provided with opposed end thrust receiving surfaces, and means for adjusting the 40 spacing of the rolls, the combination with said roll neck extension of thrust bearings cooperating with the opposed end thrust receiving surfaces and affording suflicient radial clearance to permit movement of said roll incident to adjustment ofthe spacing of the rolls, a housing carrying said thrust bearings, a support fixed to the mill housing and providing guideways for axial movement of the thrust bearing housing relative thereto, and means for adjusting the po- 'sition of the thrust bearing housing along said g-uideways. v 17. In a'rolling inill including a mill housing and rolls mounted therein in radial bearingaat least one of the rolls having a roll neck extension, anda-radial flange on said extensipn, and means for adjusting the spacing of the rolls, the combination with said roll neck extension 01 adjustable means cooperating therewith to accurately position the roll axially relative-to the mill, said means comprising a support fixed to the mill housing, a thrust bearing housing slidablycarried by said support for movement's axially of the roll neck extension-means for adjusting the thrust bearing housing axially of the roll meek extension,-and thrust bearingsv mounted in said thrust bearing-housing on opposite sides of said flange, said .thrust bearings 'bein'gadaptedto' slide radially on said flange during rotation of the latter sdas to provide the necessary clear-.

'ance for permitting radial movement of said roll'incident to; adjustment of the spacing of the rolls; I

.18. In arolling mill including. mill housings, radial bearings thereimrolls having at'least-one "(5 for adjusting the spacing of the rolls, the com- 25 on opposite sides unit including thrust bearings the opposed thrust receiving surfaces of said roll neck extension and affording clearance for persaid neck both when coaxial therewith and when offset from coaxial relation, whereby radial movement of the neck in adjusting the spacing of the rolls is permitted;

19. In a rolling. mill including mill housings, rolls having at least one formed pass and necks of the. formed pass, the necks mounted in the mill housings, and

means cooperating with said brasses for adjusting the spacing of the rolls, at least one of the rolls having substantially cylindrical necks, the combination with said last mentioned roll of means at one end only of the roll for axially adjusting the position of said roll relative to the other roll to true the roll pass comprising a thrust bearing for taking axial thrust upon said roll, said thrust bearing being-capable of cooperating with said roll both when coaxial therewith and when offset from coaxial relation whereby the spacing of the rolls may be adjusted without disturbin the position of said thrust bearing, and means carried" by the mill housing for axially adjusting said thrust bearing.

20. In a rolling mill rolls having at least one formed pass, brasses carried by the mill housing for rotatably mounting the rolls and means for adjusting the spacing of the rolls, the combination'with one of the rolls of adjustable thrust resisting mecha-' nism for resisting axial relative to the other roll, and means holding said mechanism against movement relative to the mill housing, v said mechanism providing the necessary radial clearance to permit movement of said roll relative to the mill housing incident to adjustment of the spacing of the rolls.

21. Adjusting mechanism for attachment to a rolling mill having mill housings and rolls mounted in ating to provide a formed pass, comprising a roll neck extension adapted to be secured to the neck, of one of the rolls providing the formed pass, said extension having opposed thrust receiving surfaces, a support adapted to be fixedly secured to the mill housing adjacent thereto, and a thrust bearing unit adjustably carried by the support for movement axially cooperating with mitting radial movement of the respective roll neck extension, whereby the spacing of the roll of the mill connected to opposition to the, radial loadof the rolling oper' means associated with one of ation and adjusting A its axis radially toward and said rolls to shift from the other roll.

said thrust resisting mechanism being capable of tlius cooperating with brasses for including a mill housing,

thrust upon said roll" and adjusting the position of the roll axially radial bearings therein and cooper- I from the roll housing, and movement in response 'to the aforesaid radial adof the roll, said said extension may be adjusted without disturbing the position' of said the combinatmnwijh said radially adjustable roll of a neck extension providing a thrust flange substantially concentric with said roll, anti-friction bearing elements disposed on opposite sides of said flange, a radially-fixedvbearing housing for said velements, retaining them in operative relation to said flange to hold the roll against endwise movement, said bearing hpusing surrounding said flange and sufficiently spaced radially therefrom to avoid interference with said flange when said roll, by said adjusting means, is shifted into non-concentric relation to said. bearing housing, means carried by the roll housing for su porting said bearing housing independently of said rolls, and means formoving said bearing housing endwise in said supporting means, to obtain corresponding endwise roll movement for the truing of said pass.-

23. In a rolling mill whichincludes a pair of rolls cooperating to provide a formed pass, a roll housing supporting the necks of said rolls in' opposition to the radial load of the rolling operation and adjusting means associated with one of said rolls-to shift its axis radially toward and from the other roll, the combination with said roll of a neck extension pro-.

endwise movement, said asse'mblyincluding a radially-fixed bearing housing surrounding said,

neck extension and sufliciently spaced radially therefrom to-permit said roll, byoperation of said adjusting means, to occupy a non-concentric position relative to said thrustbearing assembly, a supporting bracket for said bearing housing, said bracket being adjustably secured. to the roll housing 'andrestrained from endwise movement relative thereto, and means for adjusting said bearing assembly endwise in "said supporting bracket, to obtain corresponding endwise roll adjustment for the truing of said pass.

24. In a rolling mill which includes a pair of rolls cooperating to provide a formed pass, a.

roll housing supporting the necks of said rolls in opposition to the radial load of the rolling operation and adjusting means associated with one of said rolls to shift its axis radially toward and from the other roll, the combination with outboard thrust bearing unit cooperating with said neck extension to hold said roll against endwise movement, means for supportingsaid unit justment of said roll, there being sufllcient radial clearance between said unit and'said neck extension to permit said rolls adjustment into positions non-concentric with said unit, and means for adjusting said unit endwise in.said supporting means to' obtain corresponding endwise roll movement 25. In a rolling mill, a set of rolls, power transmission for said rolls, comprising 'intermeshii g pinions connected thereto, a housing wherein a neck extension of said radially adjustable'roll, of an for holding it against for the truing of said pass,

said rolls are rotatably supported, asecond hous- 11E containing saidlpower transmission, vertilcally movable cage supporting both ofsaid housings, means for moving and power transmission'assembly as a. unit, drivbly mounted on a fixed said cage to shift the roll ing means for said asseni base, and a shaft connecting said driving means with said power transmission and permitting said movement without disturbance of the driving connection. g

26. In a rolling mill, a set of rolls, power transmission for said rolls, comprising intermeshing pinions connected thereto, a housing wherein said rolls are rotatably supported, a second housing containing said power transmission, a vertically movable cage supporting both of said housings, means for moving said cage to'shift-the roll and power transmission assembly as a unit, means for locking said cage to position a selected pass of said rolls at the level of the pass line of the mill, driving means for said assembly mounted on a fixed base, and a shaft connecting said driving means with said powertransmis- I sion and permitting said movement without dis;

turbance of the driving connection.

27. In a rolling mill, a platform at substantially the'floor level of the mill, a housing mounted on said platform for rotatably supporting a pair of vertical rolls, a vertically moving cage below the mill fioor'level for supporting said platform, power transmission for said rolls within said cage and comprising intermeshing pinions connected to said rolls, a housing for said power transmission carried by said cage, means for vertically moving said cage, to shift as a unit said platform and the roll and power transmission assemblies, driving means for said assemblies mountedv on a fixed'base, and a shaft connecting said driving means with said power transmission and permitting saidmovement without disturbance of the driving connection.

28. A rolling mill comprising a vertically adjustable roll housing, a pair of rolls mounted in. said housing, a power transmission below said roll housing and rigidly secured thereto, said power transmissionbeing operativelyconnected to said rolls for driving the latter, means for moving said housing and power transmissionvertically as a unit, driving means for said power transmission mounted on a fixed base,-and a shaft connecting said driv'ingmeans to said power trans movementrrection.

mission and permitting said-movement without disturbance of the driving connection. v

29. A rolling mill comprising a mill housing adjustably supported for movement transversely of the path of the material to be rolled in the mill, a pair of vertically disposed rolls having fspaced working pass grooves mounted in said housing, a gear drive connected to the lower end of said rolls, means for moving said housing and gear drive vertically as a unit, and driving means for said rolls molmted on a fixed base and connected to said gear drive by a shaft adapted to permit said movement without disturbing the driving connection.

. a gear drivefor said rolls movable transversely with said housing, meansfor vertically moving .said housing to adjustthe operative position of said rolls, and driving means for said rolls mounted on a fixed base andconnected to said gear drive by a shaft adapted .to permit said adjusting without disturbing the driving con- 31. A rolling mill comprising a vertically disposedsupporting frame, a mill housing mounted for vertical movement in said frame transversely of the path of the material to be rolled in the mill, screw means for vertically adjusting said mill housing in said frame, a pair of vertical working rolls mountedin said housing, a gear .train, for actuating said rolls also mounted in said frame and connected to the lower'ends of the rolls, and driving means mounted on a fixed base and connected to said gear train bya shaft adapted to'permit said vertical adjusting movement without disturbing the driving connection. DAVID L. MEKEEL. JAMES H. CAYLOR.

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