US1671769A - Rolling mill - Google Patents

Description

LLA

May 29, 1928.

INVENTOR May 29, 1928. 1,671,769

L. LEE

ROLLING .MILL

Fil A1191, 1925 2 Sheets-Sheet 2 Patented May 29, 1928.

UNITED sra'rss rares o FFIC'E.

LEIF LEE, or YOUNGSTOWN, onto.

i ROLLING MILL.

Application filed August 1, 1925. Serial No. 47,4:4'2'.

of the invention is not limited with respect to the particular material being handled, it being adaptable to other shapes as desired. 3 In sheet mills as used at the present time, several stands of rolls are usually connected in line, each line including at least one two high roughing stand and one two high finishing stand with the rollsof the respective stands in substantial end to end relationship. The bottom rollof each stand is ordinarily positively driven, bottom rolls in adjacent stands being customarily driven from one end through a spindle located interme diate the roll stands and supported in a suit-- able housing therebetween.

Union rules as at present in force provide that when the distance between the centers of rolls in adjacent stands exceeds a predetermined amount, a single operator will not be permitted to make the throw from the roughing pass to the finishing pass, it being necessary in such cases to use a helper. This constitutes what is known as adouble throw mill and is obviously objectionable due largely to the number of operators required for the-rolling of the sheets. Where the distance does not exceed a predetermined minimum. the mill is referred to as a'siingle throw, and a single operator may effect the transfer from one pass. to the other.

At the present time two difierent typesof mills are utilized in both the single throw and the double throw class. In one type, the top rolls are not positively driven, but are caused to rotate by the friction of the'entering piece. Consequently, the thickness of the piece is limited to'that which will enter the rolls. In the other type, the top rolls are positively driven in order topermit the use of a Wider range in the thickness of the pieces, and to insure that the pieces will enter the rolls quickly andsurely.

It has heretofore been proposed to effect the driving of the top roll, in mills of the second type, in many different ways. As illustrated for example in the patent of F. C. Biggert, J12, No. 1.487007 of March 18,

1924:, one method embodies a floating housing with a friction drive between the lower and upper rolls. It has also been proposed to eifect this driving by means of an independent motor of comparatively low horse power for the upper roll. the objection to such a construction however being the difficulty in mounting the motor together with the problems involved in the accurate control thereof.

The present invention relates particularly to an improvement in a drive of the character shown in the patent to F. C. Biggert, Jr, referred to and has for certain of its objects improvements therein of such nature as to permit the use of a longer shaft for driving the upper roll, whereby the wear is correspondingly reduced, and also of means proriding an improved mounting for the shaft,

in the accompanying drawings there is shown for purposes of'illustration only a ireferred embodiment of the present invention, it being understood that these drawings donotdefine the limits of the invention as changes in the construction and operation disclosed therein may be madc'without departing from the spirit of the present invention or the scope of my broader claims.

lnthe drawings:

Figure l is a topplan view of a portion of a rolling mill. installation embodying the present invention;

Figure 2 is a'vertical sectional view on the line llll of Figure 1, certain of the parts being shown in elevation for sake of clearness; and

Figure 3 is a vertical trai'lsverse sectional view on the line ,llI--III of Figure 1 looking in the direction of the arrows.

In carrying out the present invention, there'may be provided a rolling mill installationgenerally similar to that now employed and comprising a roll stand having a lower roll 2 and an upper roll 3. The roll 2 has tions 6 adapted to receive bolts 7 depending from lugs 8 on a standard 9 supported on shoes 10 as understood in the art. Surrounding the bolts 7 are compression springs 11 the compression of which may be initially adjusted in any desired manner as by nuts 12. It will be understood by those skilled in the art that this construction permits the housing 5 to'move relatively to the standard 9 as may be required by the operation of the spindle 4.

having spaced, bearings 15' f0r a drive shaft" 16 mounted therein to the spindle 4.

Secured in any in substantial parallelism desired manner to the ing engagement with a'gear 19 the plane of which may be angii'larly disposed to its own plane. This-gear 19 has a similar tooth con structionand is secured in anyidesired manher to athub20 carried by "a casing 21 constituting par-t ofa friction power transmit ting mean's ofanv, desired construct-ion, but preferably-of thetype disclosedin my prior Patent No. 1,443,026 of, January 23,1923.

' [As clearlyfdisclosed 'in 'sai'd'p'atent', the. casis adapted toiriction'ally drive the 'hllb 22 through suitableintermedi ate mechasecured to the shaft 16 in suchrn'anneri asto effectively drive the same,

Inoperation, be apparentthat'the' spindle 4 constitutes a driving means extending between thelower rolls ofadjacent I, roll stands and at the same time serves to as -torniaintain the desired driving engagedrive the casing '21 and by means thereof friction ally drive the shaft 16 and the .upper roll 3. ne er-5' 17 and 19 are so shaped ment irrespective of the relative angular disposition thereof, whereby the gear 19 will be continuously driven in any angular positions assumed by the yoke 1 Hand the shaft- 16. At the samejtime, thedriving mechanisrn is S0- (301'n1)a'dl3ly arranged as not to necessitate any increase in the distance be tween the centers of adjacent r0ll"-stands.

This permits the maintenance of a' single. throw 'conditi on which" is" desirable for "the,

reasons pointed out.

' Further; advantages 'arise from the 151 0;

vision of a floating" housing ton-the spindle which connects th'e'bottom rolls of'adja'cent stands and from an independently movable "spondinglv 5r housing. inth'e form ot a yoke,for the driving shaft for the upper roll.

in the position of the upper roll isr'cor-re-' reduced; [In this respect iif'willv beappar'ent that the'driving' shaft-has an 'effective-lengthequalto' the distance from its the axis of rotationohthe yoke housingl,

driving connection .with the-upper roll to this axis being substantially normal-fto-the axislof'th'e shaft 1 6. f

1 'Still other advantages a s obtained by reason of "a sha f-t housing movable-about trnnnions and providing saced'bearings f for rigidly supp'ortin'g the sha t 'on oppositesides of the axis of said trunnionsi Still other advantages arise from the "'-increase in the'et'fective length'of the shaft' lfi whereby the relative an ul r distance through which it moves for each variation 1; In a rolling,mill,'a 'spindle adaptedtoz" "connecta roll in one ,st'and with a} roll in'f- -anviadjacent stand, a floating]'housingfflfor v said spindle, a "driving shaft, gearing vbe said spindle and share, and a tiltable P F spindle 4 is a gear 17 preferably having teeth 18 of curved contourto provide/a driv-' housing r said shaft and at. least a P0r-. tiOn 0f gearin sub t ntially as def 1 scribed.

2. In a rolling mill, a spindle adapted P1 0 connect'a, roll in one stand? with a'rol-l'fi'n ji [1 an adjacent standfa jfioating' hoiisin f said spindle,a"-driving shaft, igeaiin be:-: e-

,7 tween said spinclleiand'shaft,'and?a'inovable j housing for said; shaftand atleas t fa or-"580"; tion of'the 'fgearing-said'rhovableheiis y I ingfhaving supporting .tr'unnions prof] ectin'gt therefrom, substantially asdescribed.*- Ti j' i A roll. driving means for "rdlling ni'lls; i comprising 1 a standard, a "spindle honsin'g i movabl y carried fthereby,-ia spindle in" said housing, a shaft housing movably '1 :Carrie'd bTsa-id standard, a shaft journale'd "in said" sha'ft' h'ou'siingf and means carried fhy-Fth housing" forjfri'ctional ly driving 'sa'id shaft from said spindle, substantially 1 as del sclfibedi v.

4. In a rolling mill, ajs t-andard, a spindle V housing movable relativelyjtheretoyand:a shaft housing jo'urnaledin' said standard for rocking jmover'nent' thereinjsaid shaft housf p 'inghavingspaced bearings carried hereby; t substantiallyas describedi i j drive for rolling mills comprising a standard, a" spincl'le. I mounted .flierein and j 1 adapted to dri ve,airoll intheniill; a 'shaitt 1 housing carried by theistan'd'ard; ashafti ina-f I I I the housing adaptedto drive' another' foll' stantially as described I "-6t A-ldriive for rolling mills standard, a" spindlemounted; therein "and T I adapted 't0= d=r-ive a roll in the rni ll,- a"shafthousing carried by the standard, a shaft in the housingfadapted to drive'another' rolliin. theniilh and agear ,onrthe shaft operatively connected to the. spindle, the shafthousin g 11 1 being tiltab'lef about an axis fllyingisiibstan f f 1 ti'a'l'lydn the' plane-of the' 'gear, the-gear; Y

teeth being convex in form, substantially as" described; I "2; v F 3- Y 7 In a rolling mill, a'connectienbetween a H two rollers' -having relative movement iinfa plane defined bytheiraXies comprisingca pivota'lly mounted supportin'g' "frame,- a H shaftan'd. a friction clutch supportedbyfthef A.

frame andmo'vabl'e therewith.

Ina roll-ing'inill, asconnectionibet'ween I two rollers havingrelative. movement in a plane defined by their faxes cornprising I pivotally mounted supporting frame,;.- Ta" L shataagearing wheelghaving convexteeth 1301 and a friction clutch supported by the frame to the plane defined by the rollers, a shaft and movable therewith. and a driving element therefor supported 9. In a rolling mill, a connection between by the frame and movable therewith. two rollers having relative movement in a In testimony whereof I have hereunto set 8 plane defined by their axes comprising a my hand. I

pivotally mounted supporting frame, the axis of which is substantially at right angles LEIF LEE.

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