Патент USA US2018728

Oct. l29, 1935.
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2,018,728
ROLL POLISHING APPARATUS
Filed Aug. 11, 1935
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Oct. 29, 1935.
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ROLL POLISHING APPARATUS
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Oct. 29, 1935.
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ROLL POLISHING APPARATUS
Filed Aug. _11, 1935
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‘ Oct. 29, 1935.
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W, W. LEACH
ROLL POLISHING APPARATUS
Filed Aug. 11, 1933
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Patented Oct. 29, 1935
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UNITED STATES
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PATENT , OFFICE
2,018,728
BOLL POLISHING APPARATUS
William W. Leach, Warren, Ohio, assignor to
The Aetna-Standard Engineering Company,
Youngstown, Ohio, a. corporation of Ohio
Application August 11, 1933, serial No. 684,695
6 Claims. (Cl. 51-253)
The object of my invention herein described is
to provide a device by which the upper roll of a
mill, such as a two-high sheet mill, may be pol
ished continuously, or intermittently, during the
operation of the mill. The device is intended to
be used in conjunction with a polisher for the
lower roll, suchas is shownin PatentNo. 1,977,001
issued to me, and is to be driven therefrom. As
explained in my said' application, the polishing
10: of the lower or driven roll is more important than
within said tubular housing is a nut 5 which car
ries a boss 6 projecting through a slot 'I in said
housing, which slot is of sufûcient length to per
mit said nut to travel back and forth the entire
length of the face of the roll to be polished. The
screw housing rests in the angles formed by the
mill housing with the angle irons mounted there
5
on, and carries on either end thereof a circular >
ball bearing 8 of a well known type through
which the ends'of the screw bearing shaft pass 10
the polishing of the upper roll, but it is often
and in which said screw shaft revolves. `
desired that both rolls should be polished to se
cure maximum results in rolling.
Mounted on said boss 6 is a stone holder brack
et 9 which carries on its free end a polishing stone'
holder I 0, so positioned that a polishing element
I I mounted therein will bear against the face of l5
the roll to be polished. Fixedly mounted on said
tubular housing at'l either end of said slot 1 are
In the accompanying drawings:
Fig. 1 is an end View of a two high mill, with
a Vlower roll polisher, equipped with the top roll
polisher described herein, same being in position
to polish the upper part of the front face of the
roll; Fig. 2 is a top view of the mill shown in Fig.
20 1; Fig. 3 is an elevational view of the mill shown
in Fig. 1 from the rear, showing the relation be
tween the two polishers, the mill proper being
shown in phantom; Fig. 4 is an end view of such
a mill equipped with the top roll polisher de
25 scribed herein, same being in position to polish
the lower part of the rear face of the roll; Fig. 5
is a top view of Fig. 4; Fig. 6 is a‘detail drawing
showing sectionally a longitudinal cross section
of the screw shaft and housing with elements
30 mounted thereon; Fig. 7 is an end view of a
polishing stone holder with its mountings and a
dirt collector; Fig. 8 is a side view of a support
in bracket and mounting; Fig. 9 is a top view of
Fig. 8; Fig. `l0 is a cross sectional longitudinal
35 view of a portion of the housing and screw shaft
showing the nut mounted on the said screw shaft.
My device may be mountedto polish the upper
-part of the front face of the upper roll, or may be
used to polish the lower part of said roll on the
40 opposite side of the mill. When used in the posi
tion first stated, the device is removably mounted
`on the inside faces of the windows in the mill
housing as shown ‘in Figs. l and 2. For >this
purpose angle irons I are mounted on said faces
45 forming ledges upon which the polishing device
rests. ` For purposes of adjustment, as when
using a larger roll, liners areplaced on said ledge
raising the polisher to the desired position. The
device is further held in operative position by the
50 pull of the tension means hereinafter described. ‘
The polisher comprises a tubular screw housing
2 through which a screw bearing shaft 3`is ro
tatably mounted on bronze bushings which are
held in place in said housing by set screws.
55 Mounted on the screw part of ‘said shaft and
two collars I2 carrying projecting levers I3.
Mounted on, and connecting, said two -levers is a
bar I4 having a Z cross section to give it rigidity. 20
In the back of the stone holder I0 are mounted
two rollers I5 which bear closely'against one face
of said Z bar. The nut 5, boss 6, bracket 9, and
stone holder I0 are in an assembly in'fixed rela
tion. A fixed relation also exists between the 25
screw housing 2, the collars I2, levers I3 and the
Z bar I4 in another assembly. The nut 5 is
mounted on the screw portion I6, of the screw
shaft 3, and is moved therealong as the screw .
shaft is revolved. This movement is the only 30
possible movement between the two assemblies, as
the stone holder is so positioned that it travels
along one face of the >Z bar against which it is
pressed as the polishing stone carried thereon isV
pressed against the face of the roll.
35
For the purpose of applying pressure to force
the polishing element against the roll to be
polished, two collars I'I carrying fixed levers I8
are non-rotatably mounted, one at either end of
the screw housing 2 and beyond the mill hous- 40
ings. To these levers spiral springs I9 are at
tached, which springs are put under tension by
means of chains 20 which may be adjustably se
cured in forked anchors ZI, mounted on the out
side of the mill housings. Tension on said springs 45
causes the two assemblies above described to tend
to move about the screw shaft as an axis and the
polishing element carried on stone holder I0 is
pressed ñrmly against the face of the roll to be
polished.
'
50
The screw shaft 3 is preferably made hollow '
that a stream of water for cooling may be forced
therethrough. For this purpose suitable cou
plings are provided at either end thereof.
Power to rotate the screw shaft 3 and the screw 55
2
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i6 cut thereon and force the nut 5 carrying the
stone holder I0 forward and back across the face
of the roll is provided through a sprocket wheel
22 and a sprocket chain 23, driven by the lower
roll polisher. This sprocket wheel 22 is provided
with the number of teeth needed to give the de
sired speed of rotation, and is revolvably mount
ed on one end of the ,screw shaft .outside the
mill housings. Between said sprocket wheel and
10 the mill housing a half coupling 24 is mounted
by two set screws. Mounted between said half
coupling and said sprocket wheel, and engaging
ment of the sprocket chain driving the upper
roll polisher will also reverse. Should the nut
and polisher mounted thereon in the upper roll
polisher reach one end of the slot before the
lower roll polisher reverses, the action of the 5
slip clutch will permit movement of the sprocket
chain to continue in the same direction until
movement of the lower roll polisher is completed
and movement reversed, even though the nut,
having arrived at the end of the slot in the upper 10
roll polisher, renders same inoperative until
movement is reversed. By this means inequali
a iiat face on each, is a fibre disk 25. :On the ’ ties'of movement between the polishers on the
other side of said sprocket wheel-and engaging
, lower andon the upper roll are automatically
adjusted, and the upper roll is fully polished syn- 15
chronous with the full polishing of the lower
ond disk and in close contact therewith is aV roll.
Other modes of applying the principle of my
thrust plate 27, in which are three spaced holes
23 for engaging thrust pins hereinafter described. invention may be employed instead of the one ex
15 the opposite face is a second ñbre `disk 2B. Loose
ly mounted on said screw shaft beyond >said `sec- -
20
Fixedly mounted by set screws on said screw
shaft, beyond the thrust plate is a thrust collar
29. Fixedly mounted in the inside face of said
thrust collar are three thrust pins 30 which en
gage the three holes 28. Said collar also carries
25 three holes 3| therethrough in which are mount
ed coil compression springs 32. In the outer ends
of said holes 3| are threaded set screws 33 which
bear against said springs and compress them
toY
against the thrust plate 21.
Loosely suspended fromA a pin 34 mounted in
the stone holder bracket 9 is a hook shaped
bracket 35`which envelopes the polishing stone
and holder/and >catches the >dust and chips which
result from the polishing operation` Dust or
35 chips which may adhere to the face of the roll
are scraped-therefrom
a knife edge 36 mount
ed on the lower lip ‘3T of said bracket and- held
against the roll by the weight of the bracket.
plained, change being ßmade as regards the mech- 20
anism herein
disclosed, ' provided the means
stated by any of the following claims or the equiv
alent of suchstated means be employed. 'l
I therefore `particularly point out and distinctly
claim as my invention:
1
1. In combination
y
K
a machine for polishing »
the upper roll of a mill, a screw shaft mounted
parallel to s'aid roll, a nutv mounted on said screw
shaft which nut controls the movement of
mountings for holding a polishing element, 30
means transmitting reversing rotation from a
lower roll polisher to said screw shaft, whereby
the said nut is caused to move forward and back
a controlled distance along said screw shaft, and
a slip clutch between said means and said screw 35
shaft, whereby said means may continue to oper
ate when said nut reaches the limit of said con
trolled distance before the rotation of said lower
When it is desired to polish the upper roll on
40 the lower portion of its rearward face as shown
in Figs. 4 and 5, the assembly and drive are simi
polisher reverses.
lar, but the polisher is mounted on brackets 45
which are attached to the faces of the mill hous
ings. Such a bracket is shown assembled 'in Figs.
45 8 and 9. A plate 38, fixedly attached to the side
of the mill housing, carries studs 39 and 40. Loose
ly mounted on stud 39 is hook member 4| which
ber having a longitudinal slot therein, a worm
has a slot 42 near the end opposite the hook
end of the member, and rotatably mounted on a
50 stud 4T in the side of said hook member 4| is
between said means and said worm screw whereby
wedge member 43. The slot 42 engages stud> 40,
and wedge member 43 in operative position, is
Vforced down between said hook member 4| and a
head carriedron said stud 49. A handle pin 44
55 is mounted in said wedge member, and a handle
35 is provided on hook member 4| beyond the
slot 42. To remove the polisher from the mill,
wedge member 43 is lifted releasing the hook
Ymember 4|. The handle 45 of said hook mem
60 ber may then Vbe lifted which drops the hook
end upon which the polisher assembly rests, and
'the latter may then be withdrawn from the mill.
In operation the sprocket chain from the
lower roll drives the sprocket wheel mounted on
65 the end of the screw shaft. The Vcornpressiveele
Aments of the friction clutch` are so adjusted that
the screw shaft is rotated in its housing. The
boss carried by the nut'mounted on said shaft fits
in the slot in rthe lhousing and prevents rotation
70 of the nut. Rotation of the screw shaft-causes
' the nut to move along the length thereof carrying
with it the stone holder bracket and the stone
75
V
2.V In an ‘automatic polisher for the roll of a 40
mill,`in combination, a'hollow supporting4 mem
screw mounted through said member, a worm
screw nut mounted on said worm screw, a polish- ì
ing element carrier mounted on said nut through ‘5
the said slot, means whereby reversing rotation
is imparted _to said worm screw, and a slip clutch
said meansv may continue to operate until ready
to reverse after the said nut and carrier thereon ‘o
mounted has reached the limit of movement in
either direction as determined by the length of
ksaid slot.
`3. In an automatic polisher for the roll of a
mill, in combination, a hollow supporting mem- n
ber having a longitudinal slot therein, mounted
through said member a worm screw with a lon
gitudinal hole therethrough for the passage of
a cooling medium, a worm screw nut mounted on
said Vworm screw, a carrier, adapted to hold a
polishing stone, mounted on said nut by means
of an element engaging said slot, means whereby
said worm screw is reversibly rotated, and a slip
clutch between said means and said worm screw.
4. In an automatic polisher for the roll of a
mill, a hollow supporting member having a slot
60
65
longitudinal thereof, a worm screw shaft mounted
therethrough, a worm screw nut mounted on said
worm screw, a carrier for an abrasive element 70
Ymounted on said nut through said slot, an abra
sive -element mounted on said carrier, means
holder. ’ When the driving means for the lower
whereby the'assembled supporting member,
polisher reverses, to carry the lower roll polisher
screw, nut andAY carrier is oscillated about the
screw shaft bringing the carrier into a position 75
back across the face of the lower roll, the move
3
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where said abrasive element carried thereby is
ing rotation to said Worm screw, whereby the said
'compressed against the face of a roll, -means
screw nut is moved forward and back across the
whereby said worm screw is given a reversing ro
face of said upper roll, and a slip clutch inter
tation, and a slip clutch between said means and
posed between said means and said worm screw
said worm screw whereby movement of the means
whereby movement of the former is possible when
the latter is held immovable.
6. In combination in a device for polishing a
may continue after rotation of the screw is
stopped by the arrival of said nut at the end of
said slot.
5. In an automatic polisher for the upper roll
10 of a two high mill equipped with an automatic
lower roll polisher, including in combination, a
hollow supporting member, a worm screw mount~
ed therethrough, a worm screw nut mounted on
said screw and non-rotatable in said supporting
15 member, a polishing stone holder mounted on
said worm screw nut, a polishing element mount
roll of a mill, a worm screw shaft revolvably
mounted, a worm screw nut mounted on said
shaft and carrying a holder adapted to receive
a polishing element, means adapted to hold said . ‘
nut against rotation with said shaft, means
adapted- to impart reversing rotation Vto said
worm screw shaft synchronously with the revers
ing movement of mechanism polishing another 15
roll of the mill, and means independent of said
ed in said holder, means to oscillate said support- ^ last-mentioned means adapted to render same
ing member and said nut, with holder mounted
thereon, to a position in which the element car
20 ried thereby is pressed against the roll, means
driven by the lower roll polisher to impart revers
inoperative as to said shaft when said nut has
reached a predetermined position thereon.
20
WILLIAM W. LEACH.