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Патент USA US2040400

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May 12, 1936. '
'
A_ PATERSQN
2,040,400
BACKING ROLL FOR SHEET OR PACK ROLLING MILLS
Filed Feb. 6, 1933
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INVENTOR
nefariQz?rsonv
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ATTORNEYS
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Patented May 12, 1936
* 2,040,400
UNITED STATES
PATENT OFFICE‘
2,040,400
BACKING ROLL FOR SHEET OR PACK
ROLLING MILLS
Alexander Paterson, Bu?’alo, N. Y.
Application February 6, 1933, Serial No. 655,417
11 Claims. (CI. 80—38)
This invention relates to mills for use in con
nection with sheet and tin plate rolling and. more
particularly the invention is concerned with im
provements in backing rolls therefor of the kind
5 disclosed in my co-pending application, Ser. No.
with the latter to maintain the de?ection of the
working rolls at a minimum in order to adhere as
20 closely as possible to ideal rolling conditions.
It is essential to good rolling conditions that
the sheet or pack ?t the pass provided by the
working rolls. My co-rpending application, above
referred to, covers a mill characterized by a work-'
25 ing pass, which with respect to a vparticular screw
adjustment, may be varied without the necessity
Of replacing any of the parts of the mill. To
this end the backing rolls are formed .to provide
spaced zones for local contact with the working
30 rolls and the pass provided by the latter is con
trolled by varying relatively the diameter of the
backing rolls at said zones. Such variations may
be effected vby the use of suitable. heating and
cooling equipment, the said equipment being
adapted to cause the ‘backing rolljto expand or
contract at said zones to the extent which may
be necessary to- regulate the de?ection of the
working rolls. The heating and cooling equip
ment-may, for example, consist of a saddle'which
is arranged in contacting relation or in close
proximity to each of the contact zones, the said
saddle ‘being ‘maintained at the desired tempera
ture by a ‘suitable medium such as steam, hot
> water, oil, molten metal, et cetera.
55
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mill in which intermediate rolls are arranged be-
practice to employ backing rolls in .connection
with the working rolls, the former cooperating
5
v
are de?ected ‘at ‘their centers owing to the bend
proaches a ?at or rectangular .form as its thick
15 ness is ~~reduced. Heretofore, it has been the
45
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The principal object of the present invention
is to provide a backing roll of-the kind generally
described in which those portions of the roll which
provide the contact zones are-so formed that the
resistance which the roll offers to expansion and
contraction at said zones is minimized, whereby
to increase the sensitivity of the roll to the in?u
ence of the heating and cooling equipment.
‘The invention is illustrated in the accompany
ing drawing, in which:
Figure 1 is a front elevation of a two-high mill
<7
Figure 3 is a view similar to Fig. 1 showing the 5
use of one of the backing rolls in connection with
each of the working rolls of the mill.
As
the magnitude of the reductions decreases, the
magnitude of the de?ections decreases corre
spondingly. The sheet or pack, therefore, ap
4
line 2--2 of Fig. 1.
582,208, ?led ‘December 21, 1931.
In the rolling of sheet metal the working rolls,
i. .e., the rolls which provide the reducing pass,
10 ing stresses set up during each reduction.
3 UT
in which features of the invention are incorpo
rated.
Figure 2 is an enlarged section taken along
Figured is a front elevation of a two-high
I '
tween the backing and the working rolls.
10
The backing roll is illustrated, by way of ex
ample, in connection with various types of two
high mills. It is to be understood, however, that
the advantages of the, invention may also be ob
tained by the use of the roll’ in connection with 15
the working rolls of various kinds of multi-pass
mills.
’
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‘
The backing roll which is indicated generally
at 5 is illustrated in Figure 1 in connection with
a ‘mill which includes ‘upper and lower working 20
rolls 6 and 17 respectively, the said backing roll
cooperating with the lower of the workingrolls.
The various rolls are mounted in suitable hous
ings 8, each of which is provided with a conven
tional adjusting screw 9 by which the magnitude 25
of the reductions is controlled. The backing
roll, as illustrated, is formed or'provided with end
collars It and an intermediate collar H, the lat
ter preferably being of a suitably smaller diame
ter than the former. The collars provide zones 30
for localcontact with the lower working roll to
limit the de?ection of the latter during the re-_.
ducing pass, the relative diameters of the col—'
lars determining the extent to which the lower
roll is deflected, whereby the sheet or pack will 35
be ‘formed with a predeterminedcross-sectional
convexity.
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The pressure exercised by the backing roll upon
the associated working roll, and hence the degree
of de?ection of the working roll, depends among ‘40
other factors upon the relative diameters of the
backing roll at the points" of contact with the
working'roll, and this factor remains constant as
the temperature remains constant. It will be
understood that by relatively increasing or de
creasing the diameter of the intermediate section
of the backing roll, i. e. in the preferred construc
tion the diameter of the intermediate collar
whereby it will be of a diameter relatively greater
or relatively'less than the diameters of the end' 50
collars, the de?ection of the working roll will be
controlled with reference to the cross-section of
the sheet or pack. The variations in the relative
diameters of the collars will for most purposes be'
of the order of a few thousandths, i. e. up to ten
2 l
, ..
2,040,400
a
-
or
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ulated as desired. Backing rolls embodying the
invention may be of any alloy or composition.
suitable for the work in view.
ortwelve'thousandths, of an inch and such or
other variations as circumstances may require
may,vtherefore, be readily obtained by the use of
suitable heating and cooling equipment.
I claim as my invention:
7
p
1. The combination'with the working roll of a
In accordance with the invention the backing 7
roll is so formed as to minimize the resistance ‘mill of the character described,'of a backing roll
which it offers to expansion and contraction of which is provided with a zone for local contact
with the working roll, whereby by suitably heat
ing and cooling the backing roll ‘at said zone the
the portions thereof which provide the’ zones for
V a local contact with the Working roll. To this end
10 the central collar '11 of the ‘backing-"roll“is'iprb;
diariiétef’oi?lié backing roll’at said ‘zone may
vided with grooves 12' which are formed in’any be- varied "to" control the de?ection of the said
suitable manner. The said grooves divide the # working roll, said zone being divided by grooves
collar into a plurality of complementary segments‘ ‘into a plurality of complementary segments each
or sections, each of which provides arrindepend» of which provides an area for contact with the
15 ent area for contact with the working rollff flllfie ;_ ‘Working‘r'ollfwhereby to facilitate the control of
division of the collar II’ in the manner described thep'ass which is provided by the working rolls
enables relative movement between thé‘variousF ! of 5 the mill“.
sections of the vcontact zonetherebyveliminating; r 2,.Thecombination with the working roll of a
to a'large degree the constraining effect which '“m‘ill:of'the'cliaracter described, of a backing roll
20 would otherwise be present if the sectiOnalcOn'i-‘T 'which‘lisi-provided with a zone for local contact
with thesworkingmoll, whereby by suitably heat-V
sweeten were. 1191; emplqyedal- Duringzhgetieg 9r
-
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‘
backing roll at said zone the
cooling of the collar II the sections thereoi leg:
pand; or contract; asvthe; case mayT be, the’ grooves
I'2'narrowing and‘ widening as_§_the;f_said_s_ tions
more toward and-away, from we antithet
,iThe-grooves l‘2/are preferably arranged'spir M
1y or obliquely- in order to ‘ insure; quiet operation
_
Of-the .-.mi11. "and" Prevent the i-fbacking} r1011; efrem
‘ in'afri?g; or dthérwiser injuring the 'wprkine tell;
3.0 The “width of ' the groovesis the: minimum er-J'
mitted by ‘the groove- _forming- operation v‘and‘jthe
dfe'ivthT of the 'grbdvesl whichin Jen-‘t1 qasevlexceeds
the?wi‘dth is suitable 'for the,‘purposeswinjvierw,v
‘ 35 having ginrmind“ the work for which-the vrm‘ll_,;isy
designed‘: {They-collars‘ ‘10",: in‘v addition-‘tether col:
iahugi1may also vbeiclividedfinlthe manner de:
scribed ‘or; if desired,v the backing roll maxi-be
formed ‘to contact with the -worki_n_g_p_rollsthrough
outIjits entire length, thelgroovesj in’, such,
case
extending the¢full lengthjohflltheroll. ti'l‘hre;'perip11?
éral segments or sectionsrdelimitediby thelgrooves
l3; will jbee?of the - same extent.~~ Thefvrapidityjrand
s'ensitiveness of the adjustment will increase. with
thefnumber ‘of I segments; éthel‘miiiimunignumber '
,
’
’ gment‘s .consistentlwith._-the
requirements is
owf?s
pfeferablewr
‘
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'
nethe
embodiment of the nventio'nias illusl:
~.>in Figure 3a backing rolll'iiiiv is employed
V
in connection with“ eachgof: ‘thej workingnqrolls .13
‘n ‘1443f, the ‘milljthesaid backing?rolls being
' . sinnlafitojjland" functioning" in_ substantia y,» the
':
“lihéiildesian if
'hppeh and‘ lower working, (rolls:
,
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_,
,
tandem??
spectivelyr , .A, backing roll l‘llwhichgisisirnilar .to
V in
thé‘lbacking‘roll
connectioniwith
‘shown
each in
of ‘the
'Figure
working
1 is employed’
rolls_.v»'In '
this embodiment an intermediate rolli El 8, is; are,
ranged between- theworking roll~| 5 and the upper
roll and, a- similar‘roll :l is arranged be?
- tweenjit'he working ‘roll ISYand the lower backing
‘roll; rI-‘ressure: from the workingwrrolls istransa
65
nritted‘ vtoj 'thewbacking rolls fthrroughrthe agency;
a" Ofgthq intermediate; rolls, @Scoring, I101}. imarring; ’
therefore; iof. the working rolls by the backingv
rQ11S_i§zPrevented-.~
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“From-‘the v“foregoing it will~be~ apparent that,
by forming the contact zones of the-backingiroll
‘ F ingtheemanner described the said zonesare ren-,
dered’more sensitive "to the heating and‘ cooling,
equipment which is employed in connection with
thejmill.v Hence the diameter of the IOHAatTthQ
contac zones can be. rapidlyand sensitively-regL-i
t
.
a
,
dapteditoprovide
anarervicrzcpntact wit , "he working-‘roll, where.-.
byrtc; facilitate; the contro Mheepass , which. is
plovlli?d-i byi thezworking'e rolls-,1 of ithecmill.
'
‘511:3; The:'combinationiwitlttheiworkingi roll of a
mill of the rcharacterrdescribe ,
which is providedmvtitlr afizoiie 1
k
3
2,040,400
to facilitate the control of the pass which is pro
vided by the working rolls of the mill.
6. The combination with the working roll of a
mill of the character described, of a backing roll
which is formed with end and intermediate col
lars which are adapted to provide zones for local
contact with the working roll, whereby by suit
ably heating and cooling the backing roll at said
collars the diameter of the backing roll at said
10 collar may be varied to control the de?ection of
the said working roll, said intermediate collar
being divided by grooves into a plurality of com
plementary segments each of which provides an
area for contact with the working roll, whereby
15 to facilitate the control of the pass which is pro
vided by the working rolls of the mill.
7. The combination with the working roll of a
mill of the character described, of a backing roll
which is formed with end and intermediate col
20 lars which are adapted to provide zones for local
contact with the working roll, whereby by suit
ably heating and cooling the backing roll at said
8. An integral backing roll for limiting to a
predetermined degree the de?ection of a working
roll of a sheet or pack rolling mill, said backing
roll being grooved to divide its periphery into
segments, whereby to increase the sensitivity of.
the said backing roll to changes in temperature
and facilitate control of its contour substantially
as and for the purpose set forth.
'
9. An integral backing roll for limiting to ‘a
predetermined degree the de?ection of a working '10
roll of a sheet or pack rolling mill, said backing
roll being grooved along spiral or oblique lines to
divide its periphery into segments, whereby to
increase the sensitivity of the said backing roll to
changes in temperature and facilitate control of 15
its contour substantially as and for the purpose
set forth.
7
10. An integral backing roll for a sheet or pack
rolling mill having one or more contact collars,
said collars being grooved so that they are pe 20
ripherally segmented, substantially as and for the
purpose set forth.
7
collars the diameter of the backing roll at said
collars may be varied to control the de?ection of
11. An integral backing roll for a sheet or pack
rolling mill having one or more contact collars,
said collars being grooved so that they are pe--v 25
being grooved to provide a. plurality of comple
mentary segments each of which is adapted to
ripherally segmented along spiral or oblique lines,
25 the said working roll, said intermediate collar
provide an area for contact with the working roll,
whereby to facilitate the control of the pass
80 which is provided by the working rolls of the
mill.
substantially as and for the purpose set forth.
ALEXANDER PATERSON.
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