US2774263A

US2774263A - Rolling mill

Info

Publication number: US2774263A
Application number: US303045A
Authority: US
Inventors: Leufven Axel Gustav Edvard
Original assignee: Svenska Kullagerfabriken AB
Current assignee: SKF AB
Priority date: 1945-02-05
Filing date: 1952-08-07
Publication date: 1956-12-18
Anticipated expiration: 1973-12-18
Also published as: FR921235A; BE462766A; GB622643A

Description

ROLLING MILL 5 Sheets-Sheet 1 Filed Aug. 7, 1952 FIG].

mvzuron: AXEL GUSTAV EDVARD LEUFVEN ATT Y5.

Dec. 18, 1956 A. e. E. LEUFVEN ROLLING MILL 5 Sheets-Sheet 3 Filed Aug. 7, 1952.

I IIII Dec. 18, 1956 A. e. E. LEUFVEN 2,774,253

ROLLING MILL Filed Aug. 7, 1952 5 Sheets-Sheet 4 5 A. G. E. LEUFVEN 2,7742% ROLLING MILL Filed Aug. 7, 1952- 5 Shets-Sheet 5 taken on the line .of Fig.

United States ROLLING MILL Axel Gustav Edvard Leufven, Goteborg, Sweden, assignor to Aktiebolaget Svenska Kullagerfabriken, Goteborg, Sweden, a corporation of Sweden Application August 7, 1952, Serial No. 303,045 Claims priority, application Sweden February 5, 1945 5 Claims. (Cl. 80-56) and bulky stands.

Still another object of the invention is to decrease the give or yield in the mill and thereby to permit rolling to closer. tolerances.

- A further object of the invention is to provide a mill wherein it is possible to use a smaller roll diameter with a consequent saving in the cost of the rolls. Smaller rolls also afiord lower roll pressure and less power requirement.

These and other objects and the various features of the invention are set forth and described in detail in the specification of which the attached drawings constitute a part, wherein:

Fig. 1 is a side elevational view of one embodiment of the present invention;

Fig. 2 is a transverse vertical section of one side of the mill illustrated in Fig. 1;

Fig. 3 is a front elevation of a second and preferred embodiment of the present invention; 7

Fig. 4 is an end elevation ofthe embodiment illustrated in Fig. 3; V i

Fig. 5. is a fragmentary transverse vertical section taken on line 5-5 of Fig. 4; I

Fig. 6 is afragmentary longitudinal vertical section ll igh '7 is al fragmentary longitudinal horizontal section taken on the line 7-7 .of Fig. 3

Pig '8 is a fragmentary section taken on the line 8 8 f F g- '4; and:

Fig.9 is a fragmentary Section taken on the line 9-9 of Fig. 4. V

Referring now to the drawings and more particularly to the rollingmillillustrated in Figs. 1 and 2 thereof,

thefrmill is supplied with top and .

bottom work rolls

1 and 2, the

necks

3 and 4 of which are carried in roller bearingsS. and .6, mounted in journal boxes 7 and 8 respectively. Instead of being mounted in the usual stands,

each lower box 3 is bolted directly to the-bed, and the 7 corresponding upperbox 7 is-bolted to the boxfi by means of'a pair of strong bolts 9 engaging tapped holes 10 in the box i butnpassing freely through holes 11 in the box 7.' The boxes are held together by nuts 12, so as to obviate the necessity for stands or the like. Y

Thedistance between the-rolls is adjusted approximately by spacers-33. .and shims 34 surrounding the bolts atent O 2 themselves. By bolting the boxes together with a total force in excess of the roll pressure the yield of the rolls in the mill when rolling is considerably decreased. The rollers'therefore maintain'their relative positions and it is possible to roll to closer tolerances.

To permit fine adjustments to be made, the bearing 5 at each end of the roll 1 is mounted in a sleeve 13, the inner and outerv cylindrical surfaces of which are eccentric to each other. The sleeve 13 can be turned in the boxes 7 and is retained in axial position by a split ring '14, which engages a groove 15 in the sleeve. The sleeve is providedwith a projection 16.to which a socketed lever can be applied,,and by means of whichthe sleeve can be turned in the box. The eccentricity of the sleeve is about .5 to 2 mm. and the position of the rollfcan, therefore, be adjusted about :35 to :1.5 mm. for a quarter turn of the sleeve 13. This is sutficient to, cover the intervals which may be conveniently obtainedby the use of shims together with the spacers. By these means it is possible to adjust the distance very accurately be tween the

rolls

1 and 2. p

When rolling-wire it is necessary that the grooves in the rolls are accurately adjusted opposite each other and it is therefore necessary to make provision for adjusting the rolls axially relative to each other. In the embodiment of the invention illustrated in Figs. 1 and 2, this adjustment is made by shifting the roll 2 relative to the roll 1, for which reason the bearing 6 is slidable relative to the box 8. Between the bearing 6 and the box 8 is a sleeve 17, the inner and outer cylindrical surfaces of which are concentric. The sleeve 17 is threaded at its outer end as shown at 18. These threads engage with threads on a ring 20 fixed to the box 8 by means of screws 19. The bearing is held between a shoulder 25 on the sleeve 17 and a sealing ring 26 is screwed into the sleeve 17. The bearing 6 is consequently held in a fixedjposition relative to the sleeve.

A ring 21 is provided for turning the sleeve 17. The ring 21 has tongues .22, which engage with grooves 23 in the sleeve 17 and it also has a projection 24 to which can be applied, a socketed lever for turning the ring 21 and also. the sleeve 17. -As the sleeve 17 is turned it is shifted axially due to its threaded engagement with the ring 20 in the manner of a screw 'in a nut. I

The bearing 6 takes part in the axial movement and,

since the bearing is mounted on 'a tapered portion,27 V

of the roll neck and is held in place by'a sleeve 28which is shrunk onto "the said neck, the roll 2 will be shifted in a direction depending upon thedirection in which the ring 21 is turned. The amount of thismovement can be about 1 mm., but may be'more or less depending I upon the special conditions in each case.

To change rolls it is onlynecessary to "loosen the journal boxes 7 and 8 from-the bed' and replace them with a second pair of rolls, the boxes of which havealready been provided with spacers 33 'of the correct size, after which the more accurate adjustments can be made bymeans 'of the sleeves 13 and 17. The main adjustments have therefore already been made in advance and the fine adjustments required after the boxes have been put in place can be carried out very easily and quickly.

Referring now to the preferred embodiment ofthe invention illustrated in- Figs. 3m 9 inclusive, the rolling mill comprises upper and lower Work r0lls.35 arid-36 respectively. The. rolls are mounted in a generally hori- 'zontal position in roller bearings, 37 and'38 whichare .later alfdisplacement of the assembled boxes, the boxes and the bed are provided with vertically aligned lugs 43 .har a rg ister nanami t nthsrssapapaonlqskie pins 44 as clearly illustrated in Fig, 3.

As with the previous embodiment, spacers 41 are pro- .vided. between the ,upper ;and lowerebqxes .39 v andfl and th sp se an t -boxes areheld teg lth by Suit- ;able means susceptibleto preloading. ,Ingthe present instance, the {holding ,means comprises flat .bars, 45 which are received in registeringvertical:slots'46 in thejournal gboxes,39. andf,40, and in the spacers.41.t Theqlower end f eachlbar .45 ispivotally mountedain the bed 42 of the ;mill as 'bypins' 47. .;In1this manner:the.bars 45 which ,normally are engaged in..the'slots 46imay'be .readily' lrockedout' of engagementtherewithto the position illus- .tr'atediin :brokenilines in Fig. 4. "Toisecure :the bars 45 I inoperative positions Land to preload the bars, hydraulic t tensioninginu'ts49 are provided'on thenpper extremities f oofithe bars 45; The tensioning nuts seat on-tne'upper surfaces 'of the boxes' lll and-are characterized by-means T for iexerting-a high degreeof 'tension on the bars'inr the tightening' operation so as to provide asubstantial pre- 7 lo ad on'the assembly. The nuts 49 are made in accordance: with my Patent No; 257 13 5, issued October 16;;

1 95 L'Iaiid willf'not bedescribed in d etail here. r

In order to providefirier adjustment of-the relative radial positions of: the upper andylower' rolls't han'afiorded -by the spacers, each ofthe opposite end bearings'37 or the upper roll-'ismounted in asleeve. assembly 150 l of the bearing 37'is axiallyfixedlini the sleeve'51 of as- 1 sernbly, 50, illustrated in Fig. 5, and the sleeve is slida'oly mounted in the'fbox39 forb oth rotary and axial adjusteine nts therein. jThe inner and. outer cylindrical surfaces of the sleeve are Leccentric fto' each other (see Fig. 6)

7 so that the vertical position of-the upper roll 35 maybe adjustedfby simple rotation of the'sleeve in the journal, boxf The sleeve extends outwardlybeyond face of the r journal box 39,1an'd is formed onits exposed'cylindrical surface with suitablelteethil totco nstitute a worm wheel for engagement'vvitha rms; asimore fully described hereinafter. ,ToTprovideYfor axial adjustment of the,

t e" i i n te f sa i $t atd wa s mi T ifl fift fl ts t rbes em ed e wee u tab dogs 55, SS which areadjustable relatiye'to the journal :box' 39 :todetermine the axial position of the sleeye 51,

- and ithe' rl eforegthe 'roll ;35,,;as more fully.;de scribed hereinotary adjus f-journal' box 39;. jIlo actuateithegworms 15 3,rotary, hand f wheels 58,, 58 Q are "provided on shafts 59,360rdispose'd 1 a. longitudinally, above -,the roll' 35. one concentrically within st he.otheras;illustratedIinIEig. .8. Each'shaft may'be l: V, vvs i 9fl h -s1e ve a each. vof re ,isw we hs' the, W0rm;53.; which engagesthe teeth Eachr worml is mounted-inn suitabl casing 5 7 wlrich- ,isbolted;togthe outeriface of the porting the upper box- -and--for 'securingtheupperbox in position;on-;the-lowerjbox in stressed-position and thereby resisting tthe 'upward thrusts of therolls tending 1 iwhich pro vides both-radial and axialadjustment ofthe mu, so that the'lower'roll may have its associated bearings 38 fixed in the journal boxes 40. The outer ring .4 V lie e a Qtzq rzq tdi la adiu mentoflhelas oeia ed be rings and of the upper roll to which the inner race ring of the bearing is attached. 7 By the aforedescribed means, the sleeves 51 may be turned to adjust the upper roll'toward or from therloWer roll, andtalso may be adjusted axially to accurately align the grooves in the'two rolls'. lhesleeves required for the lower roll in the previously described embodiment o V are thusj dispensed witlnand -thespace required-for thern rnay b'e saved, "making possibleflto decrease the diameters of the rolls.

It is inl ttqm tqmnla edrtha therinyentionlbe ,limited to the herein-described embodiments, and considerable deviation in construction"is possible within the scope of I i the invention asidefined in the; appended'claimsw jlclaim: a 1

1. A rolling mill comprising a pairfof'rolls and separate journal boxes therefor abox-forione roll be'ingmounted V v .onand being supported-solely by the'correspondin'g-box 1 for theother r oll, 'preloadable bolt means forldirectly connecting the Pupper of the boxes-with the lowerbox i 7 .and constituting the sole means for} positioning and supto separate the-boxegfand additional meansoperative while'the boxesarein stressed conditionforadjusting-at leastone of-the 'roll's relative to its boxes" to relatively adjust the rolls in both-axial and'radial directions. j

r a'dditionaladjusting means includes means'for axially adjusting one'jof said rolls relative to -its boxes, and means "for radially'adjusting the other'said roll relative to its journal boxes therefon theboxes for one roll being mountboxes. 7 V p ,7; a V

31, A'rollingjmi ll comprising a pair of rolls and separate ed on 'andbeing supported solely by the respective corresponding boxes for the other roll, meansr for anchoring the lower of said boxes to render them immovable, bolt J means for directly connecting theupper boxes With the respective lower boxes and constituting the: sole means/ for'positioning and supporting the upperboxes and for securing the uppergboxes in position" on the lowert'boxes actuated independently :ofithe tothenan'd isprovicled with labevel :gear;;61 which engages Iawsimilar bevel gear-62, {connected by. means ofa shaft 63'to the worm 53,. Thus,

eby rotating .e'itherv one of the hand wheels '58, the corresponding worm 53 may betaetuated torotate the sleeve 5llinr'the box 39. In this manner each end'pf theroll Y SSfmaybe adjusted vertically; independently-jot?the'fither; V iEach ofxthe sleeve aSsernbIies SQ is a'clju stableaxiallyj V in its journal box 39 :by: means bfe-thejassociated iae'gs- 1 -Ssijliachisetofdogsis-adjustabl box-f39 tby'meajns of a -S:tlld 65 Wh1 isfixedlfinienox- I aslindicatedfat' 66. @The dogs "are fslidable printed on the'journalj 1 a in-stressed condition, means for preloadinig, .said ,bolt 7 means, and additional'means operative while thet boxes are in stressed condition for adjusting-atQIeast'Z one of in both axial andradial'directionsg L A rolling mill according" to, claim the rolls relative toits boxes torelatively adjustlthe'rolls to effect radialadjustrnent ofith'e roll.

' 5. A ung mill accot'd fig to claim -4ywherei.ntthea I 7 said meansfif or' adjusting-'sa id'sleeve' axially the b x co pri es.aia 'flans 1 aid l e l j fix ,5- s i b d mo n ed o la d diustabrleiqagiem nallybfsaid studs and engaged withxsaid'flange, and 7' Vi 1 on said studs eferences flowing page) i 2. A rolling mill according to claim 1, wherein said f '7 means forpositively loclging'said dogsjin'adjustedposition metastase imm nse this patent; t

pee. a isia June 27,3188? 1 j UNITED STATES PATENTS Carter Sept. 25, 1883 Miller Jan. 26, 1892 Kennedy Dec. 14, 1897 Bunker July 30, 1901 Jones July 19, 1927 Lindquist Aug. 26, 1930 Asbeck Feb. 23, 1932 Worthington Mar. 7, 1933 6 Pedigo Sept. 15, 1936 Dawson Nov. 28, 1944 Norlindh May 9, 1950 Rodder June 3, 1952 FOREIGN PATENTS Great Britain June 29, 1949 Germany May 13, 1941