Патент USA US2105258код для вставки
Jan. 11,‘ 1938. ' J, M, Q‘MALLEY 2,105,258 METHOD OF AND APPARATUS FOR ROLLING ROUNDS Filed Nov. _27, 1933 5 Sheets-Sheet l lrurenfor " Joseph m. Umalley Jan.11,1938. I J‘ M_ Q'MALLEY ‘ ‘ ‘ 2,105,258 METHOD OF AND APPARATUS FOR ROLLING ROUNDS . Filled Nov. 27, 19:53‘ ' 5 Sheets-Sheet 2 Irufgmior Joseph m. O’malley IEVD‘H w‘Attorney Ara/W Jan. 11, 1938: 2,105,258 J. M. O’MALLEY METHOD OF AND APPARATUS FOR ROLLING ROUNDS Filed Nov. 27, 1953 '5 Shéets-Sheet 5 71 \?uehior xii-0%?» m. O'malley 5}‘; hgrneg Jan. 11, 1938. J. M. O’MALLEY ‘ 2,105,258 METHOD OF AND APPARATUS FQR ROLLING ROUNDS Filed Nov. '27, 1933 ‘ 31 55 ' ' 6 WW ' ‘ . 5. Sheets-Sheet 4 7 -5(9 5? 4'8 216/ I??? \ Tr c% k 1-66 “9, a5 85 4a 49 ' - ’ 6 . a; I ' _ ‘ 6 _ 64 6%1- 6 ' 58/ 5B 59 > 30 50/ _ I 24 47 3638 40 $1 39' Joseph m. o‘mauéy ' 2533 Attorney ' Jgn. 11, 1938. " J. M. O“MALLEY ' METHOD OF AND APPARATUS FOR ROLLING~ROUNDS Filed Nov. '27, 1953 50'! ‘I l ‘ ' 24/% W'11 20/ 50''37\§ 36 35)} ‘ $40 ‘ . \25 (‘h 1 l 2,105,258 7 5 Sheets-Sheet 5' - 2a /></ Iiil1 vgf?” ’ I32 — 4 a - '66 v lnuénior Joseph m. Osmalley a %%%W Patented Jan; 11, ‘17938’ 2,105,258 UNITED STATES PATENT OFFICE. ’ . ~ 2.105.258 1 mirnon‘uor am) APPARATUS roa ROLL 4 , ' ' mo aomvns Joseph M. O’Malley, Worcester, Mass, assignor . to Morgan Construction Company, Worcester, Man. a corporation of Massachusetts‘ Application November-27_, 193s, serial?No. 699,823 12 Claims. We (Cl. sit-3c) ' v e _ _ The present invention contemplates improve ' thereof , taken in connection with the accompany- ments upon the process and apparatus of Edwards » ing drawings, inwhich-— Patent No. 1,193,001‘, of August 1, 1916, in the Fig. 1 is a diagrammatic plan ,view of a- conven~ precision rolling of metal bars of circular cross section, known as “rounds".~ '_ - - In the arrangement proposed by said Edwards patent, the usual ?nal and ?nishing roll stands'of a mill for the rolling of'roun'ds are supplemented by an additional sizing unit, providing both ver tical and horizontal rolls, the same being arranged to receive the slightly-oversize round at a con siderable distancefrom the mill. ‘Such an ar rangement, besides being wasteful of space, is extremely costly from the stand point of the extra . equipment needed for the driving of the twosets .of precision of'sizing rolls;-‘furthermore,_ since tional arrangement of rolling mill apparatus for ,the production of rounds. ~ , 5 Fig. 1a is a view similar to Fig. vl, but showing the replacement of the ?nal ?nishing roll stand ,by the precision sizing unit of my invention. Fig. 2 is a diagrammatic representation of the successive changes in cross section which the stock undergoes in the precision sizing unit of the. invention; . > -. Fig. 3 is a view in side elevation of said preci sion sizingunit. ' Fig. 4 is a transverse sectional view on the line 4-4 of Fig. 3. ‘ - the stock approaches these added ?nal ?nishing Fig. 5 is a top plan view, partly in section, on and sizing rolls with a section that is approxi- - the line 5--5-0f Fig. 6, showing the vertical roll -mately round, there can be no adequate positional assembly. control of saidistock section, to prevent it from turning on its?axis' in its approach to and passage through sucli'added stands of rolls. } ‘ The present invention overcomes all of these disadvantages. It provides for the precision siz- . no u' ing and ?nishing of the stock by-_means of asso ‘ y _ Fig. 7 is a vertical section on the line 1-1 of 5" I Fig. 8 is an end view of said vertical roll sembly. . as ~ ciated horizontal-and vertical rolls that are con tained in a roll_housing adapted to replace, as . - Fig. 9 is a fragmentary sectional view on the ‘ an entirety, the usual last stand of ?nishing rolls Like reference characters refer to like parts in of the mill; thus the precision sizing apparatus, ‘no 1 '1 Fig. 6 is a vertical section on the line 6-6 of 20 Fig. 5:" vv I ’ instead of being an. appendage of the mill,- be comes actually a part of the mill, being secon line. 9-9 of Fig. 5. ,_: . , the diiIerent ?gures. In Fig. 1 is shown a succession of horizontal. ,stands of rolls I, 2_ and 3, the same representing structed and located; that the existing driving diagrammatically the ?nishing end of a conven-. devices and connections for the usual ?nal roll vtional mill for the production of rounds; _ the stand of the mill are readily applicable for the broken line 4 indicates the path of the stock, and driving of its containedhorizontal rolls. To the . the stock sections, as well as the relative positions latter the. stock, of the usual ?at oval or elliptiq ‘cal section produced by the last-but-one of the regular-mill roll stands, is'delivered through ap propriate side guides which e?’ectually resist the 40 strong tendency‘ of such section to “turn down"; by the close cooperative action of the horizontal and vertical rolls, as hereinafter described, the stock‘emerging from this ‘precision sizing unit that replaces the last usual or- regular roll stand of the mill, acquires an accuracy and uniformity of section not heretofore obtainable with con tinuous high speed rolling.‘ > " My invention further provides a novel and highly advantageous mounting for the vertical rolls and their driving instrumentalities,‘ by which to facilitate their adjustment in, and, when de ' " sired, their removal ‘from the housing of the pre- cision sizing unit. Other and further-objects and 7advantages of the invention will more fully ap 55 pear from_ the following detailed description of said sections, both at the entrance to and the emergence from the several roll stand passes, are ' indicated by the several cross sectional, represen tationspn opposite sides of said passes. In the similar diagram of Fig. 1a, the conventional ?nal 40 ?nishing roll stand 3 of Fig. l'has been replaced, according to my invention, by a special precision ‘ sizing unit, designated as a whole by thenumeral 5, and embodying cooperating stands ‘of hori zontal and vertical rolls; the preferred construc 45 tion of this unit 5 is as follows:-‘ ' Referring ?rst to Figs. 3 and 4, the numeral 6 represents the usual» bed plate to which, in the conventional mill arrangement shown by'Fig. v1, wouldI-be fastened the housing of the ?nal ?nish 50 ing stand 3 of said mill. To facilitate attache ment to this'bed plate, the base T of the housing for unit 5 is preferably of an appropriate size and form to ?t said bed plate, as shown in Fig. 3. The opposite housing sides 8‘, 8, rising vertically 2,105,253 2 thereof, are a pair of oppositely facing yoke from base 1, provide the usual windows 8, 8, shaped blocks 28, 28,\each associated with a ver tical roll 20 and recessed, as shown at 29, to ac wherein are received and retained any suitable bearings, not shown, for a pair of horizontal rolls commodate the barrel portion of said roll. ' The II), III, extending transversely of the housing and portions of each block that lie, respectively, above each having a plurality of pass grooves II, II, as isv customary with horizontal rolls used in the and below its recess 28 are appropriately con production of rounds. It is to be understood that, no departure from known or conventional rolling mill practice is required in respect of the mount caved, as shown at 30 in Fig. 5, to receive, re-, spectively. an upper roll .neck bearing 3| and a lower roll neck bearing 32. Each upper-bearing The rolls I0, Ill are so located within thehous ordinary-?nishing mill; in other words, the exist the iower roll neck, and from which extends a ?ange 36 that is received by a suitable recess 31 in the bottom surface of block 28. The bottom 26 of the auxiliary housing or box l8 has secured thereto a plate 88 which provides the oppositely 2|)v ing driving connections for the stand of rolls re . placed by my special precision sizing unit are ap are arranged to be adjusted in or out, as by means 10 ing, retention, and adjustment of the rolls l0, III _ 3|, as shown in Fig. '7, has lugs 33 for the pas 10 in the housing windows 9, 9; consequently the sage of bolts 34 that secure the bearing to the ‘ drawing, in the interests of simplicity, omits any block 28. Each lower bearing 32 incorporates a bottom showing of the roll bearings and their adjusting or step portion 35,. against which rests the end of and retaining devices. ing that they 'aline substantially with the driv ing connections, indicated at l2, l3 in Fig. 1, that are provided for the last roll stand 3 of the inclined surfaces 38, 38, whereon wedges 40, 48 20 plicable to the drive of the horizontal rolls of said unit. Furthermore, it is to be noted by a com parison of Figs. 1 and 1a. that no changes are contemplated in the arrangement or operation of the preceding roll stands I and 2,—the same _or similar pass contours being employed in these preceding roll stands to produce ultimately the of their threaded rods 4|, 4| projecting from the end walls 22 and 23 of the supplementary hous ing. These wedges 48, 40 underlie the step por tions 35, 35 of the lower bearings and through _ them support the blocks 28, 28. By joint inward or outward adjustment of the wedges v40, 40, both blocks 28, 28, together with the vertical rolls 20, 20 and their bearings, can usual oval or elliptical stock section a that in be either raised or lowered, as desired, to aline 30 both cases is delivered upright to the ?nal ?nish ing rolling operation, being maintained in such . the vertical roll pass 2| with the pass of the upright position by the usual receiving guide M, horizontal rolls l8, l8. Furthermore, either wedge tendency of the oval to “turn down”. These guide surfaces l5, l5 very de?nitely fix and control the position of the stock section in its movement through the pass provided by a pair of cooperating grooves II in the horizontal rolls III, III, which pass, as hereinafter more particu larly described, is deliberately made “full" or sired vertical adjustments of the rolls 20, 20 have been obtained, the blocks 28, 28 are rigidly ?xed and held in their adjusted positions by means oversize on the horizontal diameter of the sec passes a bolt 45 projecting upwardly from said side wall 25. By means of nuts 46 ‘on said bolt, 40 may be moved in or out as required, for rais Fig. 3, which, as more clearly shown in the dia ing or lowering its associated block 28 and roll gram of Fig. 2, provides appropriate contact sur 35 faces l5, l5 for effectually resisting the strong‘ 28, to position the pass grooves of the two rolls 28, 20 at exactly/the same level. When the de ' tion. Furthermore, these guide surfaces l5, l5 exert the same, or nearly the same, positional - control on the stock in its passage between the of vertically disposed wedges 42, 42 that are 40 received in wedge-shaped slots 43 of each block, and bear against the side wall 25 of box l9. Each wedge 42 has a lateral extension 44 through which ‘ the wedge 42 can bevertically adjusted to pro vide the desired cooperation‘with the horizontal wedge 48 in ?xing and holding the associated block 28 and "ill 20 in any desired position of vertical adju: ment. justing devices will now be described in detail. Each ‘roll neck bearing 3|, 32 is preferably As best-‘shown in Fig. 3, each housing side 8 provides a forward extension I6 overhanging its equipped with a liner 4‘! of suitable material, such base ‘I, and in such extensions i6, I6 are provided as micarta,-the liner encircling the neck of the roll, but beingv broken away at an intermediate the matching openings or windows ll, l'l. Ex tending transversely of the housing and ?tted in portion in its length to permit the neck to be con the windows 11: H, for sliding movement on the - tacted by a yieldingly-held shoe 48, the purpose surfaces l8, l8 thereof, is an elongated box or of these shoes (two for each roll) being to seat supplementary housing l9,‘ containing the pair the roll in its bearings 3|, 32 and to prevent any of vertical rolls 28, 28. Said box or supplementary radial displacement of roll or bearings, relative to (30 housing 13 contains and supports the complete block 28, such as might occur when the stock un vertical roll assembly which, as a unit, is capable dergoing reduction is initially entered in the pass 2|. To this end, each sho'e 48 is held against its of being withdrawn by horizontal endwise move associated roll neck by a- yoke or strap 48,'the ends ment from the windows l1, l1 for purposes of re placement or repair, and which, as hereinafter of the same being adjustably secured to the block described, is subject to adjustment of position in 28 by rods 50 and 58', the latter being held yield said windows, transversely of the sizing unit 5, ingly to its work by a spring 5| disposed in a re for the purpose of aiming the vertical roll pass cess 52 of the block. In this way, each vertical 2| with any selected pair of pass grooves II in roll 28 is held ?rmly but yieldingly against the pair of vertical rolls also provided by the pre cision sizing unit of my invention,-which verti cal rolls with their appurtenant driving and ad ‘the horizontal rolls III, III. - _ 70 The box or supplementary housing l8 provides end walls 22 and 23, sidewalls '24 and 25, and a bottom 28, the latter having an aperture 21 for the escape of the water and scale from the rolling operation. Within said box, and making 75 a mug sliding ?t with the side walls 24 and 25 seat providedby its bearings 3 I, 32, in consequence of which the entrance of stock to the pass 2| may be effected without 'undueshock or strain on the apparatus; ‘ - For holding the rolls 28, 20 to their work, and maintaining the rolling pressure, the two blocks 28, 28 are each acted upon by a pair of thrust 2,106,258 ' screws 53, 53, that work in suitably threaded bush; ings 54,54 carried by the end walls 22 and 23 of the auxiliary housing'l9. To insure uniform mo tion of these thrust screws, in applying pressure ments have been made, the'two parts are then securely ?xed‘and held in their adjusted posi tions,—-thehousing l 9 by. the action of a suitable wedge 85 which is received in a horizontal slot 86, partly in wall'25 and partly in window l1, 55, and each pair oflgears 55 is in mesh with an ' formed and the slide, 68 by means of any suitable clamp operating pinion 56, journalledon a stud 51 pro‘- , ingdevice?s . q ‘ . '_ jecting from the end wall 22 or 23. To prevent ‘The above-described precision sizingunit any play between each. block 28‘ and its pressure ' (replacing the usual last-?nishing roll stand 3 of5 10 screws 53,‘ 53, a pair of rods 58, 58, having their heads 59, 59 received by a slot 68 of bracket 6| on a conventional mill ‘for rolling rounds), receives the outer end of each block 28, project outwardly , from the immediately-preceding,roll standsvof . through holes 62 in-the end walls 22 and 23 and‘ said mill the same, oval stock section a as would are encircled by compression spring 63, 63, acting ordinarily be received by said roll stand3,—and '15 against nuts 64, 64 on the ends of said rods. Said ‘there is the same provision, i. ‘e. the receiving guide M, for presentingsaid oval section in up springs 63, 63 maintain at all times the contact right position to the horizontal rolls l8, l8 of betweenlblocks 28, 28 and the heads 59', 59' of sizing unit 5. However, the pass grooves 11, their pressure screws 53, 53,-said heads 59', 59' ' said ll of these horizontal rolls, instead. of providing, being received in a slot 65 also provided by bracket like the roll stand 8, an exactly round pass, pro ' to'the associated block, each screw carries a gear , 20 6|, so that whenthe pressure screws 53, 53 are re ' tracted, the associated block 28 will have a follow vide insteada pass which is deliberately "made slightly “full”, or oversize, as shown exaggerated ly at b, b, Fig. 2, along the parting’of saidTrolls I8, l8, thus to produce a slightlyoval section 0, ing movement.‘ By. means of these head-receiv ing slots 68 and 65, the previously-described verti - ‘cal adjustments of both blocks 28, 28 can be car whose horizontal axis is longer than its, vertical ried out, without ‘effect on the functions of the rods 58, 58 and the ‘pressure screws 53, 53. '30 axis by perhaps eight or nine thousandths of an 25 .inch in a one inch piece of stock.‘ In‘. this slightly . Above their windows 11, all, the housing side section c, the ‘vertical axis (a dimension a1_~ extensions l6, l6 support a horizontal transversev oval ways under the (control of the operator. by the plate or frame 66, Figs. 3'and 4,‘the edgesof which .usual expedient of adjusting theholding-down . provide ways or guides for a slide 68. Said slide screws 88 of’th'e upper horizontal roll l8) may be 30 ' 68 provides a gear inclosure 69, and on its upper the same as the desired diameter'ofth'e, ?nished - portion supports an'electric motor 18 of suit able type, as hereinafter’ referred to, i'orjthe drive of the vertical rolls '28, 28. The shaft of motor 18, round, or may begvery, slightly under such desired diameter, as indicate at d, d, Fig. 2, in order to make allowance ‘forfany slight spread‘ in _ this con, at its lower end within the inclosure 69, carries a ‘pinion ‘1|, which is vin mesh' with a gear 12 car nection, resulting from the‘ action on' the'stock of 35 the vertical rclls ried by a countershaft l3 suitably journallecl in said inclosure. ‘The countershaft 13 also carries 28,128. ' ' j _ , ' . A delivery guide 89, adjacent the rolls 60,18, and a receiving guide 98,‘adjacent the rolls 28,28, are preferably provided in the} unit 5v forguidmg a smaller gear'llwhich meshes with and drives 40 one of a‘pair of‘ companion equal-size intermesh the slightly oval stocklsectiongcln its passage‘, to ing gears 15, 15, these latter being secured to a ‘pair of shafts ‘I6, 16, journalled in and project ing. throughthe-bottom of slide 68, and substan ‘ tially concentric with the pair of j vertical rolls 45 28, 28. Spindles TI, 11, each having'suitable cou-' the last-named rolls_,.—these guides, however, be ing tubular or funnel-shaped and exercising prac tically nodomina'nce on the position of Ithejstock section, which latter, being so nearly round, is not susceptible to the exercise of such dominance by 45 .‘plings' 18/, 19‘ with the shafts 1.6, ‘16 and'with the any engagingguidefsurfaces; vHowever, the verti > upper necks of rolls 28, 28, 'serve'to transmit to - cal rolls 28, 28 are.‘ so close to‘ the horizontal rolls said rolls 28,‘ 28 the rotation‘of shafts ‘l6; "l6 ob- ' l8, l8 in the precision‘si‘zin'g unit5‘of1rnyinven 50 ta'ined, through the tion that the vnecessary ‘positional ‘dominance to gearing :above . described, from-driving motor 18; The couplings l 9, fl 9 'are ‘ keep ‘the stockjiroin turning on‘ ‘its longitudinal "of va-suitable telescopic form -.we1l known-in the axis in passingjromftherolls, l ‘lion-t9, the‘: 1,9115 art to permit, when desired,» the previously-de 20. 20, isv amply‘furni'shed by "the smtanc‘es 1.5% 5 scribed vertical adjustment of either or both of of guide I4,——thus insuring the presgntationnbf theiverticalrolls 28,28. 1 ' ' > - . f the stock section ‘c to the, vertical ‘runs "20", 2o‘ _ ‘ By‘ mounting the entire driving. mechanism for ~ the rolls 28, 28 on the slide'i68, which is capable of . being moved in parallel relation to the movement such position‘ that thematic-rains or the ‘oval ‘re mains horizontal and ,' "therefore, ‘has'directly'; ‘exe‘iw cised‘there‘on, vin passf2l, the substantiallyiuni of the horror auxiliary'housing l 9, it is possible at form rolling pressure‘ that corrects this‘ojve'r'size '60’ all- times to’ maintain-the axial alinement of the dimension of; the stock section, I At ‘the same time, , drive shafts 16,16 and the rolls 28,‘ 28. That is to any undersize condition ‘on the‘ other‘axis'of ‘stock 60 “say, any transverse ‘adjustment .of the auxiliary section 0 is automatically corrected by the: spread housing I 9‘, for alining the pass 2| ‘with-a ‘selected factor which, in'thi's case/is effective along 'j'th‘e, "groove/e‘in'the horizontal rolls- l8, 18, is ‘accom parting. of the'vertical rolls :28, 28_1to“eliniinate' panied by an equal transverse movement of the ‘the slightly ?attened‘ portionsd, cl, ,In this way, the stock in its _passage,‘by'the action ther'eon'of' slide L68.‘ .To secure- such movements'gthe auxili- _ ' ary housing l9, along one of: its edges, is provided the cooperating passesprovided 7 with a‘rack‘88, and asimilar-rack 8| is‘iprovided ' on the plate '66. Pinions “and 83 in mesh, re. to ''spectively, with v'the.racks.._._88 and 8.] are ‘so var- ' ranged that the squared ends84, 84 of their shafts thej twojsets of rolls I 8, l8. anq'zo,_.2o;is given the accurately ‘ dimensioned andfexactl'yjroundrsectionLshown'at e inF-ig.2.. .l .. . w . v, v _ , ,_ ,, , , ' It is, to be noted that only a s‘malljamountof the project‘ outwardly to receive wrenches, orthe ' work of reduction is imposed on, the vertical rolls , like, by'which to' turn said pinions simultaneously 28, 28.‘ Consequently, the motor, lllifor driving in the same direction, for impart-ing the-desired these rolls may beat very‘ small capacity. This equal transverse motions ‘to the;auxiliary housing 75 59 and to the slide 68. ‘When these desired adjust ' ' motor is preterablyjone thathas', a drooping characteristic,-'-that is the a vertical' rolls ' would 9,105,858 4 of said reducing rolls of said unit having an inde pendent driving means carried by said unit and adjustable in unison with said last-mentioned be driven when empty at a slightly higher speed than the delivery speed of the horizontal rolls; but upon entry of the stock into the vertical rolls, this over-compounded motor would drop in . 5. Apparatus , for the precision rolling of speed to correspond to such delivery speed from “rounds", comprising, in combination, a ?nish the horizontal rolls. Because of the small amount ' rolling and sizing unit composed of two pairs of of power delivered by motor ‘III to rolls 2!, 20, the reducing rolls having alined, substantially round pull of such rolls on the stock is very light, thus " in immediate juxtaposition and substan avoiding any- possibility of deformation of the passes tially at right angles to each other, a preceding stock by tension thereon. . , stand of rolls which presents the stock to said The provision of the vertical rolls in a remov rolls. ‘ . _ with a cross section of elliptical form, a re--‘ able supplementary housing, as above described, I’ unit ceiving guide associated with said unit, and oper permits said rolls to be assembled in their en tirety and properly positioned and adjusted before ating on said elliptical section as the sole means 15 the assembly is mounted in the main housing. Furthermore, the separate drive mechanism for, such vertical rolls, and its adjustability in the ' main housing, permits said rolls to be alined selectively with any one of the plurality of passes 20 provided by the horizontal rolls,-the drive mech anism being readily adjustable to conform to the selected position of the rolls 20, 20. I claim: . 1. Apparatus for the rolling of precision rounds, to prevent the stock, in its passage through said unit, from turning on its axis, said ?nish rolling and slang unit having a mainhousing which is adapted to replace the roll housing of the usual last stand of horizontal rolls of a finishing mill, and having one pair of its reducing rolls associ ated with-the driving connections forsuch re placed horizontal stand, an auxiliary housing ad justably and removably mounted in said main housing, the other pair of reducing rolls of said from stock which is presented in substantially oval cross-sectional shape to the ?nal rolling op eration, said apparatus cdmprising ‘horizontal re unit being mounted in said auxiliary housing, and 25 having driving means carried by said unit and adjustable with said rolls. 6. The herein described method of rolling pre cision “rounds", which consists in imparting to ducing rolls providing a pass which isjslightly "iull” horizontally, a restraining guide in ad - the stock, by conventional ?nishing mill rolling, 30 vance ‘of said horizontal rolls to maintain the a pronounced elliptical cross section, subjecting oval section upright in its presentation to said such elliptical cross section to ?nish rolling and pass, and vertical rolls providing another pass im sizing ‘in a pair of alined, substantially round mediately adjacent said ?rst pass, to which other closely adjacent reducing passes having their axes pass the stock is delivered by said ?rst pass with substantially at right angles, while restraining ‘as no restraint other than 'that provided by said .said stock from axial turning movement in both guide which presents it to the ?rst pass. of said passes solely by engagement with said , 2. In the production of precision “rounds” elliptical section as it. enters the ‘?rst of said ?nish rolling and sizing in a pair of alined, sub stantially round, closely adjacent reducing passes 40 substantially at rightvangles to each other, the improvement which consists in presenting the passes. ‘ ‘ , 7. In apparatus. for the precision rolling of rounds,.the combination with a main housing and a piir of horizontal rolls therein, of a sup to stock to such pair of passes with its section in el— " plementary housing mounted in said main hous liptical form, and holding the stock from turning ing, a pair of vertical rolls carried by said sup on its axis, during such ?nish rolling and sizing, plementary housing. wedge means for vertically 45 by guide‘engager'nent only with such elliptical section. 3. Apparatus ‘ for the precision ‘ rolling of "rounds”, comprising, in combination, a ?nish rolling and sizing unit composed of'two pairs of reducing rolls having aline'd, substantially round 50 passes in immediate juxtaposition and substan tially at right angles to each-other, a preceding stand offrolls which presents the stock-to said Y unit with a cross section of elliptical form, and a receiving guide associated with said unit, and operating on said elliptical section as the sole means to prevent the stock, in its passage through ‘ said unit, from turning on its axis. adjusting vreach ‘vertical roll in said supplemen tary housing, and means associated with each vertical roll, independently‘ of the other roll of the ' pair, for e?ecting its lateral adjustment, lengthwise‘ of said housing, in~both directions. 8. In apparatus for the precision ‘rolling of 50 rounds, the combination with a main housing and a pair of horizontal rolls therein, of a supple mental-y housing mounted in said main housing and bodily withdrawable endwise therefrom, a ‘pair of vertical rolls'carried' within said supple~ mentary housing, dri, devices for said vertical rolls mounted as 'a unit on said main housing, and detachable from said vertical rolls'to permit said bodily withdrawal of the supplementary housing and its contained vertical rolls, and means operable ‘on said supplementary housing reducing rolls having alined, substantially round ' and on said roll driving device, unit for effecting passes in immediate juxtaposition and substan tially at right angles to.’ each other, a preceding their horizontal adjustments simultaneously and .stand of rolls which presents the stock to said in 9.unison. The method of producing precision “rounds" unit with a cross section of elliptical form, a re comprldn‘g the steps of rolling the stock into a ceiving guide associated with said unit, and oper ating on said elliptical section as the sole’means ‘pronounced elliptical cross-section, applying roll to opposite sides of the dock in the to prevent the stock, in its passage through said ing pressure 'of the major axis ‘of the pronolmced 70 unit, from turning on its axis, said ?nish rolling direction and sizing unit being provided as a replacement elliptical cross-section and thereby rolling the into'a cross-section which is very slightly for the usual last horizontal roll stand of the stock ‘elliptlcal with its major axis at right angles to 1 mill, and having one'pair of its reducing rolls the major axis of the pronounced elliptical cross-‘ 4. Apparatus for the precision rolling of “rounds”, comprising, in combination, a ?nish rolling and sizing‘ unit composed of two pairs of associated with the driving connections for such 75 replaced horizontal roll stand, and the other pair section, applying rolling pressure to opposite 75. 2,105,230‘ sides of axis 01 thereby section; the stock in the direction of the major the slightly elliptical cross-section and rolling the stock into a circular cross and preventing rotation of the stock ' 5 forming a semi-final pass immediately adjacent to the ?nal pass and ‘shaped to deliver stock with a. cross-section which.is very slightly elliptical, the major axis being horizontal; means to deliver aboiit its axis by guiding the pronounced ellip stock to the semi-?nal pass with a pronounced 91 elliptical cross-section, the major axis being ver tical , cross-section. .. __ ' 10. Apparatus for the precision roilingv of ‘ tical, and a receiving guide imrnediately adjacent “rounds” comprising a ?nal roll pass shapedto to the semi-?nal pass and arranged to prevent rotation of the stock about its axis. I deliver stock-with a circular cross-section, a semi ?nal roll pass immediately adjacent to the ?nal 12. Theinethod' of producing precision “rounds” 10 pass and shaped to deliver stock with a‘ cross~ which consists in initially rolling the stock to' a section which is very slightly elliptical, means pronounced elliptical cross-section, subjecting the - to deliver stock to the semi-?nal pass with a pro- , so-rolled stock to two closely-contiguous rolling nounced elliptical cross-section, and a receiving . operations which impart thereto, ?rst, a slightly 15 'guid’e immediately adjacent to theseini-iinal pass elliptical cross-section, and then a round cross and arranged to prevent rotation of the stock section, and, during said last-mentioned rolling about its axis. operations, preventing rotation of the stock vabout its axis by guiding action on the pronounced ellip '1’ , p - /' 11. Apparatus for the precision‘ rolling of “rounds” comprising a pair of vertical rolls form tical cross-section thereof; . a . 20" ing a final pass and shaped .to deliver stock with a circular cross-section, a pair or horizontal rolls 20 JOSEPH M. 0mm.