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Патент USA US2105258

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Jan. 11,‘ 1938.
Filed Nov. _27, 1933
5 Sheets-Sheet l
" Joseph m. Umalley
. Filled Nov. 27, 19:53‘ '
5 Sheets-Sheet 2
Joseph m. O’malley
Jan. 11, 1938:
Filed Nov. 27, 1953
'5 Shéets-Sheet 5
xii-0%?» m. O'malley
Jan. 11, 1938.
Filed Nov. '27, 1933
5. Sheets-Sheet 4
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1-66 “9, a5
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3638 40
Joseph m. o‘mauéy '
' Jgn. 11, 1938.
Filed Nov. '27, 1953
‘I l
$40 ‘
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5 Sheets-Sheet 5'
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Joseph m. Osmalley
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Patented Jan; 11, ‘17938’
mirnon‘uor am) APPARATUS roa ROLL
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.
(Cl. sit-3c) '
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.
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
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
It provides for the precision siz- .
no u' ing and ?nishing of the stock by-_means of asso
Fig. 7 is a vertical section on the line 1-1 of
Fig. 8 is an end view of said vertical roll
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,
'1 Fig. 6 is a vertical section on the line 6-6 of 20
Fig. 5:"
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
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
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
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
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
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
jecting from the end wall 22 or 23. To prevent
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.
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
_ ,
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
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.
' >
- .
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
, ,_
' It is, to be noted
only a s‘malljamountof
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
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
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
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
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
3. Apparatus
precision ‘ rolling
"rounds”, comprising, in combination, a ?nish
rolling and sizing unit composed of'two pairs of
reducing rolls having aline'd, substantially round
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
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.
sides of
axis 01
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 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.
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
'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
/' 11. Apparatus for the precision‘ rolling of
“rounds” comprising a pair of vertical rolls form
tical cross-section thereof;
20" ing a final pass and shaped .to deliver stock with a
circular cross-section, a pair or horizontal rolls
JOSEPH M. 0mm.
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