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Патент USA US2090402

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Ag. 17, 1937.
M. MORGAN
2,090,402
ROLL I NG MILL
Filed March 16, 1936
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INVENTOK
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ATTORIVEY
Aug. 17, 1937.
M, MORGAN '
2,090,402
ROLLING MILL
Filed March 16,
2 Sheets-Sheet 2
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INVENTOR
BYNéégé “ZN
Patented Aug. 17, 1937
2,090,402
NT
STATE%
2,090,402
ROLLING llmlil '
Myles Morgan, Worcester, Mass, - assignor to
Morgan Construction Company, Worcester,
' Mass, a corporation of Massachusetts
Application March 16, 1936, Serial No. 69,030
(CL 80-38)
This invention relates to rolling mills, and more these chocks being releasably held against end
/
9 Claims.
particularly to mills of the four-high type having
a pair of comparatively small work rolls which
are supported against the rolling pressure by
5 means of a pair of comparatively large backing
rolls.
In mills of this type, the backing rolls are re
moved infrequently, whereas the work rolls are
changed rather often, they being withdrawn and
10 insertedin an endwise direction.
Ordinarily, the
work rolls only are driven, the backing rolls being
idler rolls which are rotated merely by frictional
engagement with the working rolls. It is desir
able to maintain the work‘rolls separated from
15 each other, and each in ?rm contact with its
backing roll even when no stock is passing through
the mill, so that the backing rolls will be rotated
continuously and no slippage will occur between
the rolls as the stock enters the mill.
2
Various
arrangements-have been proposed heretofore for
this purpose, but these prior constructions have
been complicated and expensive, and they have
frequently rendered it di?icult to change the rolls.
It is accordingly one object of the invention to
25 provide a simple and inexpensive construction
for maintaining contact between the work rolls
and the backing rolls in a four-high mill.
It is a further object of the invention to provide
a simple and inexpensive construction which will
a“ maintain the desired separation of the work rolls
in a four-high mill without interfering with the
withdrawal and insertion of these roll-s.
With these and other objects in view, as will
be apparent to those skilled in the art, the inven
'35 tion resides in the combination of parts set forth
in the speci?cation and covered by the claims ap
I -. pended hereto.
' Referring to the drawings illustrating one em
wise movement in the housing by suitable clamps
IS. The usual vertical screws 20 (Fig. 1) are
mounted in the housing above the upper chocks
ill to provide for adjustment of the pass between
the working rolls; these screws, as usual, receive
and resist the upward pressure caused by the roll
ing operation. In order to facilitate removal
and insertion of the upper backing roll l6 and
to support its weight when no stock is passing 10
through the mill, the upper chock M is provided
with two ?anges 2i which project laterally from
opposite sides and engage a pair of horizontal
rails 23 arranged parallel to the axis of the roll.
The rails 23 are urged upwardly by means of hy 15
draulic motors 2t mounted on the face of the
housing l0 and connected to the ends of the rails
by links 25. The construction of the rails 23 and
associated parts is more fully described and.
claimed in my prior application Serial No. 66,273, 20
?led February 28, 1936.
_
Upper and lower work rolls 2‘! and 28, respec
tively, are mounted between the backing rolls
l6 and I1, the work rolls being supported in upper
and lower bearings 29 and 30, respectively. The 25
upper bearing 29 is located between spaced pro-.
jections 32 which extend downwardly from the
sides of the upper chock M, and the lower bearing ’
30 is located between spaced projections 33 which
extend upwardly from the sides of the lower chock 30
l5. Provision is preferably made for maintain-\v
ing the alignment of the work rolls with the back-\\
ing rolls in accordance with the teaching of the "
prior application of Frank'P. Dahlstrom, Serial ‘3,
No. 585,922, ?led January 11, 1932,. For this pur
pose, adjustable members 36 having similarly
obliqued surfaces are mounted against the inner
surfaces of the projections 32 and 33, and plates
35 are fastened to the sides of the work roll bear
ings 29 and 3B. These plates 35 are formed with
Fig. 1 is a side elevation of a four-high mill . cylindrical outer surfaces which engage the inner
oblique surfaces of the members 34, the parts
embodying the invention; Fig. 2 is an enlarged view of a portion of Fig. being so constructed and arranged that if a work
1', certain parts being broken away for clearness roll is slightly out of parallelism with its backing
roll, the resultant screwing action will move the 45
of
illustration;
45
Fig. 3 ‘is a side view of one of the bearings for work roll axially, and the oblique surfaces of the
members 34 will cause the roll bearing to move
the upper work roll; and
,
'
Fig. 4 is a fragmentary detail showing portions laterally and restore correct alignment, all as de
scribed, in the aforesaid Dahlstrom application.
of two work roll bearings.
It will, of course,‘ be understood that the con 50
The
embodiment
illustrated'comprises
an
up
50
struction shown in Fig. l willv be substantially
right housing consisting of two spaced side por
tions l0 (only one being shown), each having the duplicated for the other housing portion II] at
usual window II. Mounted within the window the other ends of the rolls.
bodiment of the invention, and in which like
reference numerals indicate like parts:-—
are bearing chocks l4 and I5 for upper and lower
55 horizontal backing rolls l6 and H respectively,
The work rolls 21 and 28 are driven by any
suitable means, and the backing rolls l6 and I1 55
2
2,090,402
are idlers which support the work rolls against
the rolling pressure. Itis important to main
tain a ?rm driving contact between each work
roll and its backing roll when no stock is passing
5 through the mill, for if a work roll should'slip
on its backing roll, a longitudinal groove would
soon be worn in the latter.
In order to maintain
this driving contact, vI provide suitable fluidpressure actuated mechanism which is associated
10 with the checks of one of the backing rolls, this
mechanism acting through suitable levers to force
the work roll bearings apart. In the preferred
construction illustrated, the upward projections
33 on the lower backing roll chocks I5 are pro
15 vided with vertical bores or cylinders 31, in which
are located slidable plungers or pistons 38 having
upwardly extending stems 39.
Pipes 40 con
nect with the lower ends of the cylinders 31 to
vdeliver fluid under pressure to the cylinders and
be noted that in changing work rolls no piping
need be dsconnected. Theconstruction is sim
ple, compact and inexpensive.
Having thus described my invention, what I
claim as new and desire to secure by Letters
Patent is:
‘
1. A rolling mill comprising a pair of work
rolls, bearings for the work rolls, a pair of back
ing rolls, bearings for‘ the backing rolls, one of
the backing roll bearings being bored to form a
cylinder, a plunger slidable in the cylinder, and
a lever actuated by the plunger and operating on
both the work roll bearings to force the latter
apart.
'
~
2. A. rolling mill comprising a pair of work 15
rolls, bearings for the work rolls, a pair of back
ing rolls; bearings for the backing rolls, one of
the backing roll bearings ,being bored to form a
pair of cylinders, a plungerv slidable in each cylin
20 to exhaust ?uid therefrom. The upper ends of der, and a pair of levers actuated by the plungers 20
the stems 39 engage the outer ends of horizontal ‘and operating on both the work roll bearingsto
L
levers 42, each lever being secured intermediate force the latter apart.
3. A rolling mill comprising a pair of work
its length to a transverse horizontal pin 43 par
allel to the roll axes and forming a fulcrum.
25 Each lever 42 is mounted between a pair of spaced
ears 44 projecting laterally from the lower por
tion of the upper work roll bearing 29, the pin 43
being rotatably supported by these ears. The
inner ends of the levers engage small hardened
30 blocks 46 inserted in the top of the lower work
roll bearing”. It will be apparent that the ?uid
pressure in the cylinders 31 will force the plungers
38 and the outer ends of the levers 42 upwardly,
causing an upward pressure on the upper bear
35 ing 29 and a downward pressure on the lower
bearing 30. The arms of the levers 42 are pret
erably so proportioned that for a predetermined
fluid-pressure in the cylinders 31, the actual
pressure between one work roll and its backing
40 roll will be substantially the same as that between
the other work roll and its backing roll, due al
lowance being made for the weight of the work
rolls and their bearings.
Provision is made to avoid interference between
45 the levers 42 and the lower work roll bearings 30
when changing the upper work roll. For this
‘purpose, the upper work roll bearings 29 are
formed with recesses 48 (Fig. 2) in their lower
surfaces, these recesses being positioned to- re
50 ceive the inner ends of the levers 42 when the
plungers 38 are lowered. Coiled tension springs
49 connect the bearings 29 with radially pro
jecting studs 50 oh the pins 43, these springs‘
tending to swing the inner ends of the levers into
55 the recesses 48, thus preventing engagement 0!
the levers with the lower work roll bearings during
endwise‘withdrawal or replacement ofthe upper
work roll.
*
It will now be apparent that before, the'mill is
60 started ?uid will be admitted under pressure into
rolls, bearings for the work rolls, a pair of back
ing rolls, bearings for the backing rolls, one of
the backing‘ roll bearings having two spaced pro
jections located on opposite sides of the adjacent
work roll bearing, each of said projections being
bored to form a cylinder, a plunger slidable
in each cylindet, and a pair of levers actuated by 30
the plungers and operating on both the work roll
bearingsto force the latter apart.
4. A rolling mill comprising a pair of parallel
work rolls, bearings for the work rolls, a pair of
backing rolls parallel to the work rolls, bearings 35
for the ‘backing rolls, one of ‘the backing roll
bearings being bored to form a pair of cylinders,
a plunger slidable in each cylinder, and a pair
of levers fulcrumed about axes parallel to the
roll axes, the levers being actuated by the plung 40
ers and operating on both the work roll bearings
to force the latter apart.
‘
'
5. A rolling mill comprising a pair of parallel
work rolls, bearings for the work rolls, a pair 01
backing‘rolls parallel to the ‘work rolls, bear
ings for the backing rolls, one or the backing
roll bearings being bored to form a pair of cyl
inders, a plunger slidable in each cylinder, and a
pair of levers fulcrumed on one of the work roll‘
bearings about axes substantially parallel to 50
the roll axes, one end of each lever engaging the
other work roll bearing, and the other ends of
the levers being actuated by the plungers.
6. A rolling mill comprising a pair of parallel
work rolls, bearings for the work rolls, a pair of
backing rolls parallel to the work rolls, bearings
for the backing rolls, one of the backing roll
bearings being bored to form a pair of cylinders,
a plunger slidable in each cylinder, and a pair
of levers iulcrumed on one of the work roll bear 60
ings about axes substantially parallel to the roll
axes, the inner end of each lever engaging the
other work roll bearing, and the outer ends of
the cylinders 31, lifting the plungers 38 and forc
ing the work roll bearings 29 and 30 apart by
‘means of the levers 42. This will provide a sub- ,
stantial pressure between each work roll and its the levers being actuated by the plungers. _
'7. A rolling mill comprising a pair of parallel 65
55 backing roll, and when the work rolls are rotated,
work rolls, bearings for the work rolls, a pair of
the backing rolls will also rotate without any dan
ger or slippage. When it becomes necessary to backing rolls parallel to the work rolls, bearings
for the backing rolls, one of the backing roll
change the work rolls, the pressure will be re
lieved from the-cylinders 31, lowering the plungers bearings being bored to form a pair of cylinders,
70 38. The springs 49 will then swing the levers 42 11 plunger slidable in each cylinder, pairs of 70'
into the recesses 48, and after one wedge 34 has spaced ears extending from opposite sides )of one
been removed at each end of the upper work roll ofthe work roll bearings, and a lever mounted
21, this roll and its bearings can be withdrawn
in 'an endwise direction. The lower work roll can
75 then be withdrawn in a similar manner. It will
between each pair of ears and fulcrumed- on said
ears about an axis substantially parallel‘ to the
roll axes, the inner end of each lever engaging 78
3
aooaeoa
the other work roll bearing, and the other ends
of the levers being actuated by the plungers.
8. A rolling mill comprising upper and lower
horizontal work rolls, bearings for the work rolls,
upper and lower horizontal backing rolls, bear
lugs for the backing rolls, the lower backing roll
bearing being bored to form a pair of vertical
cylinders, a plunger slidable in each cylinder, and
a pair of levers fulcrumed on the upper work
10 roll bearing about axes substantially parallel to
the roll axis, one end of each lever engaging the’
lower work roll bearing, and the other ends of
the levers being actuated by the plungers.
9. A rolling mill comprising upper and lower
horizontal work rolls, bearings for the work rolls,
upper and lower horizontal backing rolls, bear
ings for the backing rolls, the lower backing
roll bearing being bored to form a pair of vertical
cylinders, a plunger slidable in each cylinder, 2.
pair of levers fulcrumed on the upper work roll
hearing about axes parallel to the roll axis,
5
the inner end of each lever engaging the lower
work roll bearing and the outer ends of the levers
being actuated by the plungers, the upper work
roll bearing having recesses adapted to receive
the inner ends of the levers, and means tending 10
to turn the levers about their fulcrums 'in op
position to the plungers, said means serving to
swing the inner ends of the levers upwardly into
the recesses when the plungers are lowered.
MYLES. MORGAN.
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