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Патент USA US2411395

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N0v.19,1946.
„SUTTON
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2,411,395'
ROUND STRAIGHTENER
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Filed Aug.
15,
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1944
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5 Sheets-Sheet 2
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Nov. `19, 1946.
J. B. SUTTON
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2,4'1 1,395
ROUND STRAIGHTENER
Filed- Aug. l5, 1944
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Nov. I9, 1946.
~J. B. sp1-TON
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ROUND sTRAiGHTBNER
Filed Aug. 15, 1944
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5 Sheets-Sheet 4
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NOV' 19, 1946-
J. B. SUTTON ,
ROUND STRÁIGHTENER
Filed Aug. 15, 1944 m
2,411,395
l
5 Sheets-sheet 5
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INVENTOR
bbaFwM/y
2,411,395
PatentedüNov. 19, 1946-
UNITED STATES PATENT oEFlcE
4aumen'.
Ú
ROUND STRAIGHTENER
John Blair Sutton, Beilefonte, Pa., assignor'to,v
Sutton Engineering Company, Pittsburgh, Pa..
` a corporation oi Pennsyl
Application August 15, 1944, Serial No. 549,582
7 Claims.
(Cl. 153-60)
.
The invention relates to cross-roll straighten
ing machines, machines, that is to say, embody
ing cross-rolls for the hot or cold rolling or
straightening of bars, rods, shafts, pipes, tubes,
'and other sections. I
°
Ordinarily, a cross-roll straightening machine
2
,
A
,
.
view, showing to largerscale a single cross-roll,
its supporting yoke, an’d the adjusting means and
driving elements Vassociated therewith; the parts
shown in Fig. IV appear partly in side elevation
and partly in section on the plane IV--IV_ of
Fig. 1I. Fig. V is a fragmentary view, showing
ayoke and cross-roll assembly to still larger scale,
includes several passes comprising each a plural
and showing the yoke partly in elevation and
yity of cross-rolls, and the rolls of each pass are
partly in axial section. And Fig. VI is a frag
relatively adjustable, to adapt the machine for
different sizes and sorts- of work. In general the 10 mentary, sectional view, taken on the plane
VI-VI of Fig. I.
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invention is directed to certain refinements and
Referring to Figs. I~and II, the reference nu
elaborations in cross rolling machines, in conse
quence of which the required adjustments may
meral i indicates the concrete base upon which
< two opposed bed members 2 are firmly supported,
he more readily and accurately effected.
and reinforced by cross-ties 2a. Three housings
More particularly the invention is- applicable
to and effective in large tube-straightening ma
or auxiliary frames 3, 3, 3 are borne upon the op- '
posite bed members 2, and each housing includes
ehines--machines adapted to process tubes and
four cross-rolls 4 which form one of the -three
pipes of large diameter. í’In a large machine of
roll passes of the machine. The concrete base
this kind there is a tendency for the rolls to dis
tort the walls of the tubes being treated, and I 20 is recessed, as shown, to provide clearance for
portions of the machine extending downward,
nkhave found that four rolls may be so organized
between the bed members >2, and below floor level.
in each pass that the harmful effects of this ob
,The manner in which a cross rolling machine
jectionable tendency are eliminated. My inven
operates to straighten or roll down rounds (a
tion contemplatesà an arrangement of each cross
roll pass in which the position of the rolls and 25 round being stock of round cross section) is gen
erally known in the art; the powerfully rotated
their mounting means are at least approximately
cross rolls of the several passes exert lateral pres
symmetrical about the center of the stock acted
sure upon the stock, and helically propel it
upon, and in which the distorting pressure of
the rolls is minimized by a symmetrical or ap
through the machine, as the arrows on tube T
proximately symmetrical load application to the 30 indicate in Fig. III. 'I'he pass line of the inter
mediate group or pass of rolls of a cross-roll
stock.
straightening machine is oiïset laterally from the
. A further consideration is the provision of suit
able driving means for large, contoured cross
normal pass line PL of the machine, the normal
pass line |being considered a straight line extend- ~
rolls arranged in the above-mentioned multiple
35 ing 'through the centers of the entering and leav
organization.
ing‘ roll passes, to deñectingly act on stock travel
The invention still further embraces improved
ing through the machine. Thus, the stock is
roll-driving means, and improved means for ad
laterally bowed as it helically advances between
justing the rolls of each pass, and for adjusting
the entering and leaving roll passes of the ma
the passes themselves relatively to one another.
While the present Vimprovements vare applicable 40 chine. The effect of such known treatment is to
straighten and true the stock.
to cross rolling machines in general, they are
While the cross-rolls are so shaped or contoured
particularly advantageous in a large tube
that in known manner they engage the stock in
straightening machine of the sort mentioned, and
,lines of contact of substantial lengths, such ex
in such embodiment the invention is hereinafter
described.
«i
In the accompanying drawings Fig. I is a view
in side elevation of such machine; the machine
will ordinarily be mounted upon a heavy concrete
base extending below floor level, and 4in Fig. I
such a base is shown in vertical section. Fig. II
is a. view in cross section of the machine and base,
taken on the plane II-II of Fig. I. Fig. III is a
4154 tended lines of contact are ineffective in the case
of large tubes (in which the ratio of the tube
diameter to its wall thickness commonly is great)
to inhibit the objectionable tendency of the tube
'walls to bulge and become distorted under the
inñuence of the inwardly directed pressures of
the rolls. That is to say, the walls of a tube under
the pressure of cross-rolls tend to bulge circum-`
ferentially outward between `the points or lines
phantom view, illustrating, on the plane III-_III
of contact of the rolls with the tube. In over
of Fig. II, the three roll passes which in this case
the machine includes. Fig. IV is a fragmentary 55 coming this objection, four cross-rolls 4 are pro~
2,411,395
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vided; the four rolls are substantially equispaced
includes a flange I4a' adapted to engage the inner
face of a housing I5 for the gearing 9, III, andv
about the pass line upon which the tube T' (Fig.
II) is advanced, and advantageously all four rolls'
a lock-nut I6 is arranged on the threaded ‘sleeve
externally of such housing. . Normally. the lock
4of the pass are powerfully rotated.
In operating upon heavy work of the sort under
nut I6 v,lies tight against the external face of
housing I5, and the flange I4a_ held forcefully
present consideration, the lateral, flexing thrust
A (Fig. III) of "the intermediate pass, and the
opposing thrusts B`--B of the entering and leav
ing passes are of relatively great magnitude. The
.usual cross-roll straightening machines employ
against the inner face of'ïthe housing, whereby
only two cross-rolls in each pass, and it appears .
that the rolls‘and supports therefor of such a
machine cannot be designed to withstand the
termediate housing 3.
heavy and costly construction. AIn providing four
cross-rolls >in each pass the lateral thrusts (A
and B) _are advantageously divided between two
rolls. The arrows B' and B" in Fig. II illustrate
how the lateral thrust B of 'the leaving, pass is
,
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maybe provided by vertical rather than trans
verse adjustment of the housing for the inter
mediate roll group.
20
` To adapt the machine for various sizes of tubes,
.
Still another adjustment-fof the machine is
desirable. As ~indicated by the arrows b `in Fig.V
III, the entering or leaving passes of rolls, or
desirably both of suchl passes, areV adjustable
, of the pass' line of the machine, and, as will pres-4
longitudinally of the pass line PL. The housings -
ently appear, means are provided to effect radial
.
_
I the knowledge of an engineer skilled in the art,
the rolls 4 ofreach pass are adjustable- radially
adjustment of the rollsjof a pass.
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Obviously, the adjustment _of the intermediate
roll group, by simple modification well within
strains, certainly not without going to extremely ,
divided between two cross-rolls.
the sleeve is locked in ñxed position, and the
shaft 6 keyed thereto is held against rotation.
Alternately, when the lock-nut is loosened, the
sleeve I4 may idly rotate, andl the shaft 6 may
be operated for effecting adjustment of the in
25 3 of the entering and ,leaving passes include side
brackets 3c whichrest upon the bed members 2
and are slidable longitudinally `thereof. .lis`
shown in Fig. I, threaded shafts I1 are rotatably
It is further desirable that Vthe degree of tube
ñexing shall be ‘varied to suit different sizes of
tubes, and such variation in degree of flexing is '
obtained by adjusting the rolls of 'the interme
ñxed in stationary journals 2b on opposite ends
diate pass or group of rolls transversely or ver
30 of the bed members 2;l these shafts Il severally
tically of the machine. As-shown- in Figs. I and
extend in threadedî engagement with lugs 3d
VI, the housing or frame 3 of the intermediate
integrated with the brackets 3c ofthe housings 3, ,
pass of rolls includes integral brackets 3a which
whereby rotation ofthe shafts will produce move- ,
Vslidably rest upon the opposite bed members 2,
ment of the housings> longitudinally of the ma
chine. Conveniently, a shaft I1 is `arranged on ’
and such organization, while providing the >de
sired sturdy support for the housing and its rolls,
admits of the adjustment of the housing between
`each sidevof the housings 3, as shown in Fig. II,
and, as appears in Fig. If the shafts organized
with- the entering roll housing are rotatable,I by
' « the bed members, that is, transversely of the
.means of» hand wheels I6, independently of the
normal pass v'line of the machine, as indicated by
arrows a in Fig. III.. Upon the upper faces of 40 shafts I1 that control the leaving roll housing.
e The- two shafts I1 cfa-each housing 3 are inter,
the bed members 2 are secured guides 5, serving
connected to rotate in unison, and sprocket chains
in conjunction with the brackets 3a to maintain
I9 (extending in »the line of sight in Fig. I)V
the intermediate roll housing 3 in ñxed position,
afford means ,tothis'end Thus, the entering or`
.longitudinally ofthe pass line, while providing
leaving pass of` rolls may be adjusted as a unit
adjustment of its pass 'out of alignment with the
relatively to the intermediate pass and longi
' primary line of the pass Yas defined in the enter
ing and leaving roll groups.
Again turning to Fig. VI, means for effecting
the transverse adjustment of the intermediate
housing 3 are illustrated. Such means comprise 50
a threaded shaft 6 rotatably secured to the hous
ing 3 at 1, and extending in threaded engagement
with a sleeve or nut 8 secured to the 'adjacent
bed member 2. The shaft 6 includes a journal
portion 6a upon which a gear 9 is slìdably keyed;
a pinion I0, responsive to the rotation of a hand
wheel II in either direction, is effective to rotate A
the gear 9 in either direction of rotation, whereby
the shaft 6, turning within fixed sleeve or nut 8,
tudinally of the pass line of the machine.
In further-accord‘with the invention each of
the driven cross-rolls 4 is provided with its own,
independent, driving motor 40which is organized
in unit assembly with the yoke-400 in which
the roll is trunnioned, as Àshown in Figs. IV and
V. Each roll-supporting yoke 400 includes a
hollow spindle 40| which extends perpendicu
la'rly to and centrally ofthe axis of the sup
ported roll 4,'note Fig. IV.
The yokes 400; ,supf _»
ported bythe spindles 40I in secure engagementv ‘
with the roll housings 3, are severally adjustable ‘
angularly and axially of their spindles 40|; that"A
is effective to shift the housing`3 transversely of 60 i-s, the rolls 4 are-adjustable radially of the-„pass `
the pass line. The brackets 3a, that ride the op
_line -of the machine, and the angularity,-;»of-1.ther
posite bed members 2 are provided with slots 3b,
roll axes with respect to such pass linenmayfbe
varied. Means for effecting such'adjustment, of '
through each of which a lock-bolt I 2 extends; "
theyokes 400, and in consequence the coopera-l
the lower end of each lock-bolt is secured in the
> underlying body of the supporting bed member, 65 tive »relation of the rolls, willrpreseritly be` de
and the upper end of the bolt carries a nutJI3,
Advantageously, the roll housings> 3 are formed
lying above the slot 3b. Normally, the nuts I3
of substantially duplicate segmental sections v3l) '
are tightened on the bolts I2, and the brackets
scribed.
3a are thereby securely fixed upon the bed mem- "
„bers 2, but, upon loosening the nuts, the housing 70
3 may be adjusted in the manner explained.
Additional locking means may be organized
with the screw shaft 6, and such means may
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which are secured end-‘toeenisay by ¿means of .
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There being four rolls in eachl
pass Ain this case, each housing `3 comprises four ‘
housing sections 30, and, as may be perceived in ï‘
Figs. vII and IV, each roll, its supporting yoke, and its driving motorv are secured inl unit assem-"
comprise an externally threadedsleeve I4, slid?
ably keyed to the shaft portion 6a. The sleeve 75 bly with a housing section 30. Thus, each roll
t
2,411,395
pass of the machine comprises four unit assem
blies comprising a housing section 30, yoke 400,
motor 40 and roll 4,*and each of such unit assem
blies is a duplicate of another. Indeed, a roll
tion of the yoke 400 varied. Thereupon, the set
screws 35 are again tightened, and the yoke with
its cross-roll'4 is secured in desired position of
angular adjustment.
.
pass may thus be constructed of four identical 5
It is desirable that the yoke 400 shall be fur
units, and the three roll passes `of the machine
ther adjustable, to the end that, for reasons al
may be formed by twelve identical units ar
ready mentioned, the position of the cross-roll 4,
ranged in three groups, and assembled upon the
radially of or laterally of the pass line of the
bed elements 2.
>machine, may be regulated. Still considering `
The rotary drive shaft 4| of each motor 40 10 Fig. IV, a pinion gear 38 is mounted upon each
extends through the hollow supporting spindle
>of the unthreaded portions 32a with which the
40| of the roll it drives, and Fig. V shows how
.yoke-adjusting screws are provided; each pinion
a train of reduction gears 42 are connected' to
the neck 43 of roll 4; bevel gears 44 and cross
shaft 45 transmit rotation from power shaft 4|
to the gears 42, whereby the roll is powerfully
rotated by its own driving motor. It will be
understood, therefore, that each driven roll of
the machine is provided with its own, mechani
_ gear' 30 is> held against lateral movement in aV
housing 39, and the gear is slidably feathered to
the journal portion 32a of the screw with which
it is associated; the several pinion gears 36 mesh
in common with a ring gear 50 that is idly mount
ed upon the hollow spindle 40|, and, manifestly,
- by rotating one of the screws 32 in housing seg
cally independent driving unit 40, and that by 20 ment 30, all screws 32 are caused to rortate in
regulating the R. P. M. of the several motors the
unison therewith. Movement of the screws in
peripheral speeds of the rolls may be severally
one direction of rotation or the other causes such
adjusted in a manner which cannot be achieved
readily. if at all in a machine having a main
drive shaft to which several rolls are geared.
More importantly, the driving organization
adapts itself readily to different peripheral roll
speeds in the several roll groups of the apparatus,
which adaptability is useful in performing a pol
ishing operation on the stock by pulling it through
the apparatus by increased peripheral roll‘speed
in successive passes.
While the driving. units 40
are mechanically independent, they are subject
to common electric control. That is to say, the
operation of the several driving units 40 is sus
ceptible of electrical coordination, by means of
well-known electric devices which in themselves
form no part of the present invention, and,
therefore,` are not illustrated.
Referring particularly to Fig. IV, it will be seen
that each housing segment 30 includes a plurality
of roll-adjusting screws 32 `that extend parallel
to the stem 40| of the yoke installed in such
housing segment; the several screws 32 are spaced
screws to travel in unison laterally of the hous
ing segment 30, to the right or to the left (Fig.
IV), depending upon the direction of screw rota.-V
tion. Accordingly, the yoke and motor assembly
(400, 40|, 40), -by embracing the opposite ends
of the screws 32 in the manner explained, is
adjusted axially of the spindle 40|, i. e. the roll
4 is adjusted radially of the pass line of the ma
chine. Of course, the set-screws 35 may be loos
ened, more readily to admit of the rotation of
the adjusting screws 32, and when an adjustment
has been effected the set-screws are again tight
35 cned.
Advantageously, all four rolls 4 of a pass are
~adapted .to be adjusted in unison, whereby they `
may be moved in synchronism radially inward or
outward of the pass line, as the jaws of a rotary
40 >chuck are movable relatively to the axis about
`which a_ piece of work is to be rotated in a ma
chine tool, say in a lathe. To this end one of
the adjusting screws 32 of each yoke carries a
bevel gear 5|. As shown in Fig. II, the bevel
45 gears 5| of the several yoke and motor assem
blies of a pass of rolls are interconnected, by
apart circumferentially of the spindle 40|, and
severally make threaded engagement with brush
ings 33 secured in the housing segment.y At its
means of bevel gears 52, connecting shafts 53,
outer end the spindle 40| is integrated with a
55, and universal joints 54. The shaft 53 is
vflange member 34, upon which the motor 40 is
equipped with a hand wheel 56; rotation of such
mounted; the flange 34 carries a plurality of set 50 hand wheel is eñîective to rotate in unison all of
screws 35 that project through the -body of the
the adjusting screws 32 of the four yokes in the
flange, and bear against a “floating” ring 36.
pass of cross-rolls, and, manifestly, all rolls 4
The outer ends of the yoke-adjusting screws 32
of the pass are thus susceptible of adjustment in
normally abut the ring 36, while the inner ends
in the manner described in the forepart
of the screws 32 bear against the face 402 of the 55 concert,
of thisl specincation.
yoke, and it is manifest that, by tightening the
Various structural modifications may be made
set-screws 35 against the ring 36, the spindle 40|
by any skilled worker in the art of cross-roll
is drawnvto the right (Fig. IV), and the face 402 ‘ straightening machines without substantial mod
of the yoke is pressed forcefully against the inner
in those elements pf my machine organ
ends of adjusting screws 32, _while the ring 36 is 60 iñcation
ization
in
which novelty primarily resides, and
urged with equal and opposite force against the
having exemplified my invention by showing and
outer ends of said screws 32. Thus, the struc
describing one apparatus embodiment thereof,
ture engages with clamping effect the opposite
that invention is to be limited only by the state
ends of the adjusting screws 32, and, such screws
being normally stationary in housing segment 30, 65 ment of the claims appended hereto.
I claim as my invention:
the yoke is rigidly held in adjusted position.
V1. A cross-roll straightening machine having
Conveniently, the set-screws 35 carry nuts 31, to
plural four-roll passes; each pass assembly com
lock the set-screws in their normally tightened
positions.
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prising a frame, means for mounting four cross
It- will be understood that, by loosening the , rolls with approximately equal angular spacing
set-screws 35, the pressure on ring 36 is relieved, 70 in said frame concentrically with the center line
and the clamping Vpressure of the yoke face 402
against the inner ends of the adjusting screws 32
of a pass formed by the said rolls for the re
ception of round stock therebetween and means
for driving at least one roll of said pass; means
is interrupted, whereby the spindle 40| may be
for adjusting at least one pass assemblyI as a
turned in the housing 30, and the angular posi 75 whole transversely of the machine with respect
2,411,395
to' the pass line of the machine deilectingly to. v
act on stock travelling through the machine, and
' means for adjusting at least one pass assembly `
as a whole longitudinally of the pass line.
- 2. A cross-rollV straightening machine having
at least three four-roll passes; each pass as
sembly comprising a frame, means for mounting
four cross-rolls with approximately equal angu
lar spacing in said frame concentrically with the
l5. Ay cross-roll straightening machine having
plural four-roll passes; 'each pass assembly com
prising a frame,4 means for mounting four cross
rolls with approximately equal angular spacing in
said frame concentrically with thecenter line of
a pass formed by the said rolls for the reception
of round stock therebetween and individually
powered driving means for the said four rolls of
the pass assembly; means for adjusting at least
center line of a pass formed by the said rolls for 10 one pass assembly as a whole transversely of the
the'reception of round stock therebetween and
individually powered driving means for the said
four rolls of the pass assembly: and means for
adjusting one pass assembly as a whole trans
machine with respect to the pass line of the ma
chine deiiectingly to act on stock travelling
through the machine, and means for adjusting
at least one pass assembly as a whole longitudi
versely of the machine with respect to the pass 15 nally of the `pass line.
6. A cross-roll straightening machine having
line formed by the other two pass assemblies of
at least three four-roll passes; each pass assem
l the machine deiiectingly to act on stock travel-bly comprising a frame, means for mounting
ling through the machine.
four cross-rolls with approximately equal angu
3. A cross-roll straightening machine having`
at least three four-roll passes; each pass assem 20 lar 'spacing in said frame concentrically with the
bly comprising a frame, means for mounting ' center line of a pass formed by the said rolls for
the reception- of round stock therebetween and
four cross-rolls with approximately equal angu
means for driving at least one roll of said pass
lar spacing in said frame concentrically with the
center line of a pass formed by the said rolls for
_ the reception of round stock therebetween and
assembly; and means for adjusting one pass as
sembly as a whole out of pass alignment with the-
means for driving at least one roll of said pass;
and means for adjusting one pass assembly as a
whole transversely of the machine with respect
to the pass line formed by the other two pass as
other pass assemblies deiiectingly to act on stock
rolls approximately equidistantly in said frame
concentrically with the center line of a pass
means for the said four rolls of the pass assem
bly; and means for adjusting one pass assembly
formed by the said rolls for the reception of
round stock therebetween, individually poweredl
as a whole out oi pass alignment with the other
pass assemblies deflectingly to act on~ stock trav
travelling through the machine,
'1. A cross-m11 straightening machine-having
at least three four-roll passesyeach pass assem
semblies of the machine defiectingly to act on 30 bly comprising a frame, means for mounting four
cross-rolls with approximately equal spacing in
stock travelling through the machine.
Y
said frame concentrically \withv.a pass formed by
4. In a cross-roll straightening machine hav
the said rolls for the reception of round stock
- ing plural four-roll passes; a pass assembly com
therebetween and individually powered driving prising a frame, means for mounting four cross
driving means for the said four rolls of the pass
assembly, and means for adjusting at least one 40
»pass assembly as a whole longitudinally of the
pass line deiiectingly to act on stock travelling'
through the machine.
elling through the machine.
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JOHN BLAIR SUTTON. i
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