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Патент USA US2406219

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Aug., zo, 194e.
2,406,219
F. R. HlGHT ETAL
` ROLLING MILL
Filed Dec; 21„ 1942
12 speets~sheef 1
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INVENToRs
_Fran/"ihn, 'Rl H mi
Rober? s0. áfreens/z Leids’d ,
fz'zedrLC/z JNLœZZer W'
Aug, 209 1946.
F. R„ HIGHT Erm.
2,406,219
ROLLING MILLv
Filed Deo. 21, 1942
12 Sheets-Sheet 2
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1 ATTORNEY
Aug. 2o, v1946. -
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~F. R. LIGHT Em
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2,406,219
ROLLING MILL
Filed Dec; 21, 1942
12 Sheets-Sheet' 3
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INVENTORS
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ROLLING'MILL
Filed psc. 21 ,_ 1942
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Aug. 20,' 1946.
.F. -R. HIGH-r' ETAL
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nuLLING MILL
Filed Deß.` 21,_ 1942
12 lsharm-sheet 5
Aug. 20,` 1946.
F. R. HlGl-r‘r ETAL
2,406,219
ROLLING MILL
Filed Deo. 21, 1942
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F. R. HIGHT ETAL
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F. R. HIGHT ETAL
ROLLING
2,406,219
MILL
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Filed Dec. 21'l 1942 ~ ,
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ATTORNEY
Allg»> 20, 1946---
F.. R. HIGHT ETAL `
2,406,219 '
ROLLING MILL
12 Sheets-Sheet- l0
Filed Dec. 2l, 1942
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ROLLING MILL
Filed Dec. 2l. 1ï42
l2 Sheets-5119612311
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H_vVENTORs
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ATTORNEY
Patented Aug. 20, 1946
2,406,219 ,
UNITED STATESl PATENT' OFFICE
2,406,219
ROLLING MILL
Franklin R. Hight and Robert 0. Greenshields,
Detroit, and Friedrich J. Mueller, Grosse Pointe
Woods, Mich., assignors, by mesne assignments,
to The Budd Company,`l’hiladelphia, Pa.,
poration of Pennsylvania
Application December 21, 1942, Serial No. 469,660
19 Claims. .(Cl. Sil-_16)
1
This invention relates to rolling mills and par
ticularly to mills for rolling relatively thin discs
from ñat blanks.
One well-known. type of mill for this purpose
employs a rotary table for supporting androtat
ing a blank while a pair of horizontally sup
ported rolls are moved into rollingv engagement
with the blank on opposite sides of the center
c
2
`
.
equally divided between the different rolls of the
mill.
'
A further object is to provide a mill constructed
~ and arranged to control thespeed of rotation of
a blank being .rolled so as to maintain the speed
at'the point of rolling substantially constant.
A further object is to provide a mill in which
successive rolling passesof the rolls are auto
thereof and move outwardly radially of the blank ,» ~ matically increased in length in accordance with
the increase in the diameter of the blank being
as it rotates so as to have a combined rolling
rolled.
and spinning effect to produce a relatively thin
A further object is to provide a disc rolling
disc having a considerably larger diameter than
mill of such improved construction and mode of
the original blank. Usually, these mills are so
constructed that when rolling a given thickness . » operation as produces an improved product.
These and vother objects, which will be appar
of disc, the rolls are adjusted and lixed rela 15
ent to those skilled in the art, are accomplished
tively to the surface of the blank supporting
vby the invention hereinafter described,- one em
table to provide a workingpass the size ofthe
bodiment of which is shown in the accompanying
finished disc. As a result, if it is desired to sub
ject a given blank toa plurality of rolling passes i drawings in which:
Fig. 1 is a front elevation of a mill constructed
it is necessary to “backtrack” the rolls to the
in accordance with one embodiment of this in
center of the disc along the same path which
vention, taken from the operator’s side of the
they followed in their outward rolling movement
mill and embodying an end view of the mecha-"1
and while in contact with the surface ofthe blank,
after which the rolling operation can be repeated 'f‘ nism for handling and feeding blanks.
Fig. 42 is an elevation taken from the »right of
with the same size Working pass as previously. 425
Fig. 1.
While such an operation is possible and can be
Fig. 3 is a top plan view of the mill shown in
repeated to provide the desired number of rolling
Figs. 1 and 2, parts being broken away and shown
passes, it is a very severe treatment for the metal
of the disc in that the rolls are forced inwardly f i'. in section.
'
to their starting position while in contact with 30 Fig. 4 is a vertical section on the line 4-¿lv of
Fig. 1.
l
~
the‘disc’s surface.
Fig. 5 is a sectional view on the line 5-5 of
An object of this invention is to provide a
Fig. V2.
mill for rolling relatively thin discs from flat
Fig. 6 is a horizontal section on the line 6-6
blanks constructed and arranged to provide any
desired number of successive rolling passes for a 35 of Fig. 1.
Fig. 7 is a vertical section, on an enlarged scale,
given disc without backtracking the rolls in con
tact with the disc’s surface.
A further object is to provide a mill for rolling
discs in which a blank is subjected to successive
passesi of diminishing size.
A further object is to provide a mill for rolling
discs having an improved position of the roll in
regard to the disc’s `surface resulting in an im
proved rolling operation and a better surface on
the finished product.
A further object is to provide `a disc rolling mill
arranged for operation by a single operator.
A still further object is to provide a mill for
of a roll mounting.
Fig. 8 is a section on the line 8--8 of Fig. 5.
Figs. 9, 10, 11, and 12 are views showing Var
ious details of the mechanism for controlling
the feed of the rolls and are taken on the section
lines 9_9, I0----Iß, II-l I, and |2-I2, respectively,
of Fig. 3.
Fig. 13 is a plan view of the blank handling
and >feeding mechanism showing the same in in
ward Yposition for placing a blank on the work
table and removing a iinished disc therefrom.
Fig. 14 is a section of the blank handling _mech
rolling discs having an improved blank and disc V t anism taken on line Ill-I4 of Fig. 13.
handling mechanism for removing rolled discs 5.o Fig. 15 vis an end view taken from the left of
Fig. 14.
1
’
from the blank support and depositing fresh
Fig. 16 is a diagrammatic plan view showing
blanks thereon.
the offset rolling which the present machine is
A still further object is to provide a mill con
adapted to carry out.
structed and arranged to >roll aldisc .in such a
way that the rolling operation is substantially 55 Fig. 17 isY a. diagram showing a detail, and
2,406,219
3
heat produced by the rolling operation causing
Fig. 18 is a diagram showing one arrange
ment of hydraulic pressure system which can be
the lubricant to vaporize.
employed to operate the present machine."
The present invention comprises a mill for
vention, which has been chosen for the purpose
~'I'he particular embodiment of thel present in- Y
rolling relatively thin discs from ñat blanks
including .a rotary work table ror blank support
for supporting a blank and rotatingA it about its
center. One or more rolls mounted for rotation
about horizontal axes are moved downwardly into
of illustration and which constitutes one form
of apparatus for carrying out the method of mak
ing wheel discs or the like disclosed and claimed
in copending application, Serial No. 517,194, ñled
_January 6, 1944, and entitled Method of rolling
rolling engagement with the blank adjacent its
wheel discs, comprises a mill having a bed plate
center and are’ then moved outwardly radially of f
v 20 on which are mounted vertically extending
the blank while in rolling contact therewith so
as to spin and roll the material of theblank to
m guideY posts 2l, shown as four in number, tied
form a relatively thin‘ disc of greater diameter.
head l22. ' A vertically movable roll Vcarriage 23
rigidly >together at their upper ends by a press>
than the original blank. As 'iswell-knownin the 1.5 inthe form of a hydraulic ram has bearing plates
' art, the face of the work tableor blank'support,I ;_ 24, see Fig, v6,- for slidable guiding engagement
may either be ñat for rolling discs having par
.with the posts 2l), and is supported on the lower
allelrsides, or it may be of conical form' to pro-Í.'
end of afiluid pressure piston 25 by a connect
ing. ring. 26 bolted to the carriage and engaging
duce tapered discs. The rolls are slidably mount- §
ed for horizontal movement in the lower face of 20 a groove 21 in the piston. The piston isoper
ated by a fluid pressure vcylinder 28 for hydraulic
a vertically movable roll carriage which, is pref
erably formed by a hydraulically operated rain,
and mechanism is providedfor accurately limit
operation` of the roll carriage y23.'>
A work table or a blank support
ing downward `movement of the carriage toward
the blank support so that
the size of thework `25
,
ing pass betweenthe> roll and the support canv
beaccurately controlled. Provision is made for;
subjecting each blank to a plurality of succes
sive rolling passes and the feeding mechanism is ’
'
is mounted on
the bed plate 20 4and comprises a housing v3|
shapedto provide an inner annular flange 32 sup
porting Va vrotatable work table or blank support
33 Asecured by a clamping ring 34 to- an annular
basev member 35 supported for rotary movement
on annularly arranged roller bearings 36'which
automatically controlled to produce successive 30 areAV mounted on the annular supporting ilange
passes of decreasing size.
i
After each pass the
32’. The table base 35 is rotated by a shaft 31
suitably geared theretoand driven fromV any
blank` is relieved ofthe roll pressure andthe
rolls Vare, moved ,back to the centerof' theV blank
suitablesource of vpower such, for example, asv
n
while out of contact therewith.
an electric motor 38.` As can be seen Vfrom Fig.
In each pass`
ï. the thickness'vof the blank is decreased and the 35 4, the blank supportingfsurface of the table'33 is
diameter increased and mechanism _is provided`
of conical‘shape so that the lñnished` disc will
for causing theV rolls Yto move’radially outwardly
have a tapered cross section, as well-known in>
l
the art. Y Obviously, >if anon-tapered disc is de
ofthe blank an v,increasingamount on succes-vr
sired the work supporting surface will be flat.`
`.Each blank is Aformed with a central oriñce
. sive passes, the increases corresponding general
ly with theV increase in diameter of the blank. At
the sameltime the speed of rotation ofthe'work
table or blank support is so controlled tliat'the`
and is centered on the work holder by a cen-I _
tering stud 4l, see Figs'. 4 and 5. The stud is
mounted in a collar 42 bolted to a socket mem'
speed of the blank at the roll'pass during move- i
ment of the rolls radially outward is maintained
ber 43 slidably ñtting in a socket in _theupper
substantially constant so that the material of ,45
the blank near the center thereof is rolled at ,sub
stantially the same rolling speed as the material
nearthe periphery. Also, when a plurality of
rolls are employed the mechanism for moving
each roll radially of the blank during thev rolling 50
end'of- a sleeve 44 keyed'in the central opening
of the annular base member 35, and centered .
within the annular flange 32 by roller bearings
45. Thevannular space between the sleeve 44
and the surrounding ñange 32 is sealed at k_the
bottom by a packing gland '46'.
The blank cen- .
tering stud 4I, collar 42 and socket member 43
p operation is so operated and controlled as to in- ï
sure the rolls moving outwardly at substantially
‘ the same speed radially of the blank so as'to`
` substantially equalize the amount of work done
’ are vertically movable for the _purpose of raising
~ aV iinished disc above the blank support into posi
tion to _be engaged by the blank handling mech-Y
55 anism hereinafter described. These parts are
`_ by the different rolls.
supported on the upper end of a tube 41 having
The presentV invention also comprises a> blank
anddisc handling mechanism of such character p
‘ as tov permit operation of the mill by.v a single
operator. By means of thisv mechanism a finished ‘
` disc is automatically raised above the blank sup
i port at the end of the rolling operation. The
' operator has, in the meantime, loaded the Yblank
§ handling mechanism with a fresh blank. AUpon'
a ilange 48 at the top located in the socket mem
ber 43 with a ball race 49 between the flange
and the Vbottom of the socket. A washer 5I
60 keyed to the flange has a polygonally shaped
opening for non-rotatably engaging the polygonal
head of a central rod 52 extending downwardly
through the tubular supporting member 41. ' A
second roller bearing 53 is located between the
operating the mechanism the freshfblank is de 65 washer
5l and collar 42. Vertical movement `is
imparted to the tube 41, centering stud 4I and
1 posited on the blank support in properly cen
‘ tered position for rolling, while the finished disc
associated parts-by a fluid pressure mechanism
I " is grabbed by the mechanism and removed.
including the cylinder 54 and/piston 55, the lat
Op- s
erationV of the mill by a single operator atrone ,
ter having a threaded end connected tothe
V side thereof leaves'tlíe opposite side of the mill 70 lower threaded end of the central rod 52 by a
1 free for such a device as'r a smoke hood for’ col
threaded sleeve 56, the sleeve fitting into a re
î lecting and delivering> to a suitable exhaust sys'- 1 ' cess formed on the lower end of the supporting
1 tem smoke producedV by the rolling operation.`
l`This„smoke‘ is caused _by vaporization ofrglubri
tube 41. 'I'he tube 41 and central rod 52 vare held
cant applied t0 >fresh blanks’by' the operator, the
75 rod from' the sleeve 56, by a flat face 51 on the
against rotation, to prevent unthreading of the
asociale
5
tube engaging a similar `face on yafbracket 58 in
which the tubeis lslidable.
,
Y
‘The table‘supporting be'aringsare »lubricated by
oil delivered to the roller ~bearings 36 throughV
passages {il vand 52, see Fig. 4, drilled -inthehous
ing .3|. From theroller bearings it ,flows lout
wardly in each direction to the driving gear ¿on
one sideand to the roller bearings 45 on the other,
6
tothe 4cuter `end of a shaft 95<-e§<tending through
bracket `Sit secured to the vertically movable car
riage 23, Aand threaded in a socket 91 in the 4roll
slideißi. A pin '98 locks the stop vshaft 95 in the
socket., It will be apparent that the position of
the stop collar or nut 94 ony theshaft 95 will’defi
nitely‘limit the inward movement ofthe rolliand
determine the point on the disc near the center
thereof at which the vrolling operation will begin.
flowing ultimatelyfintoa sump-63 .from which it
is drained through passages 64. Packing „65,see 10 Adjustment of the 'collar on the shaft‘willxvary
E’igs. 44 y.and 5. `prevents oil ,from leaking' upwardly
around the work support. A splash pan 66 ¿is
secured `to `the base 3| and >surrounds the .rotary
the point atwhich the rolls engage the blank.
work support for the `'purpose of .collecting any
ton and cylinder 25 and 23. This movement’is
Vertical movement of the vroll carriage 'or slide‘23
is effected by'hydraulic pressure .through the pis
liquid, grease and the _.like, used-on the blank 15 accurately guided by thebearing plates 2a engag
ing guidefaces formed by wear plates I_IiI onseach
post 2 I, see Fig. `6. The cylinder 23 is rigidly bolt
ed :to the press head v2.2 which is supported 'upon
’ jects vabove the blanksupport a ,sufficient distance
the _posts 2l. The press headand posts are'rig
to prevent a blank being accidentally thrown out
of themill bythe rotating support.
> ` 20 idly connected to the bed -plate 20 by tie rods
482 which extend through the bed plate, posts
It should be noted that the .entire Work `table
2| and press head 22, and the assembly isfrigidly
assembly is easily removable from the mill later~
clamped together under considerable pressure by
ally upon removing fthe ¿bolts which secure the
clamping collars |03 and |04 threaded Vto the
work support base ’3| tothe main bed 20, `after
and thrown foñ during rolling'to‘keep'the same
from entering the .driving unit. The .pan pro
the sleeve 58 has been .Unthreaded to permit the
centering stud and the >associated structure being
lifted out of the annular sleeve 44.
In the illustrated embodiment of the Vpresent
inventionfare shown two'oppositely disposed rolls
61 adapted to be moved into engagement With a
blank near the center thereof, to be moved out
wardly across the blank in ~a radial direction as
the blank rotate‘s, then to be lifted >away from the
blank‘to relieve it of rolling pressure »and then
tobe returned inwardly to the starting point near
lower and upper ends, respectively, of the tie rods
H32. ~Accordingly, the tie rods |02 are maintained
in a state of tension at all times.
Mechanism vis ~provided for determining and
limiting the downward movement of the rolls
toward the blank support for the purpose of de
termining Athe size of the roll pass and this mech
anism is such that, if desired, the rolls can be fed
nearer `to the .support to reduce thesize of suc
cessive `roll passes when a plurality of passes are
employed. :As illustrated, this mechanism corn
prises a kplurality of `’screw shafts Ill-5, extending ~
the center of the blank. Each roll Vis supported
through and keyed to the vertically movable roll
through roller bearingsïßß on the innerend of a
carriage or slide 23 andvprovided with stop collars
shaft -69 keyed against rotation in `a ysupporting
i535 secured tothe lower ends thereof for limiting '
bracket '1.I by y.a key 12, see.Fig.»8, and supported
in place-bye. strap 13 4bolted tothe bracket 1 I. An 40 the downward movement of the slide and supg
ported rolls. By raising or lowering the screw
end plate -14 supports the outer end of the roller
shaft-E9. Lubricant is fed through `a supply pas
shafts |05 and supported collars |06', the extent
sage 15, VAdrilled in the roll supporting shaft 69,
and flows through passages' l5, roller` bearings r68,
of downward movement of the rolls can be ac~
curately controlled. Each shaft |05 is'keyed to
see Fig. "1li-thence 'through `the rear roller bear 45 the slide >23 and is adapted to be vertically ad
just-ed by a' sleeve `|01 threaded to the shaftfandl
ings 58 and out through passages 11 and 18 drilled
in the Vsupporting shaft ES. The packing glands , rotatably mounted in the ypress head 22, bearing
sleeves `|69 being provided. The threaded sleeve
19 are .to prevent leakage between the ends ofthe
has a collar III at one end and a collar II2
roll and its supporting shaft. Other ¿packingis
provided to prevent leakage between the shaft 50 threaded thereto at its-lower end -to -prevent longi
tudinal movementof 'the sleeve in the press head.
and the end plate 14.
A `bevel gear I I3 is keyed tothe upper end of the '
The shaft supporting bracket 1I forms part of
sleeve >|01.
`
a roll supporting slide '8| mounted for horizontal
The gears ||’3„associfated with the different
sliding movement on guide-Ways 82 formed in
the lower face of the vertically movable roll sup 55 shafts |05 are'interconnected for simultaneous
and equal movement by shafts v4| I 4, II5‘, and IIB,
porting ram or carriage 23, the slide being sup
see Fig. 3, and gear II8, IIS, |20, I2! mounted on
ported by clamps 83 bolted to the lower face of
the respectiveshafts and meshing with the vari
the carriage. The'friction faces between the slide
ous gears H3. The shaft IIB is lprovided with
and guide-Ways are provided with suitable Wear
plates or liners 84 having grooves 85 in the -faces 60 mechanism for rotating the same to raise and
lower the stops |06. Means are provided for ad-'
justing the stops manually to se-t the same at
Mechanism is mounted upon and movable with
the beginning of the rolling operation, and ad
the vertically slidable roll supporting carriage or
ditional means are provided for automatically
slide 23 for moving the rolls horizontally on the
carriage. As illustrated, this mechanism corn 65 adjusting the., stops during continued rolling.
As illustrated, a hand Wheel |22 rotates a ver-- `
prises a separate fluid pressure cylinder 86, asso
tical shaft |23 through gears IZA, see/Fig. l6..
ciated with each roll. operating a piston 81 con
The shaft |23 is connected toa shaft |25 through
nected to the outer head of the roll shaft 69 by a
a worm gear |26. The shaft |25 is geared to a
flexible connection consisting of a split collar 88
surrounding the abutting ends of the piston rod 70 gear I21§having clutch ’teeth adapted `te engage
similar teeth .on .one side of a clutch collar |29
and roll shaft and having annularlflanges 89 and
9| engaging in grooves 92 and 93 on the »piston ' feathered‘to -a countershaft |29 which .isfin turn
connected 4to the shaft |.I6 ythrough gears I 3|- `
rod Aand roll shaft. respectively. see Figs. 5 and '7.
|32, `see Figslß and 12. The opposite sideof .the Inward movement of each roll on its supporting
clutch collar :|28 has/*teeth :adapted- -to engage4
slideis limited >by a stop nut or collar 94 secured
thereof for lubrication.
2,406,219
7.
8
’ corresponding teeth on a Vcollarî |33 rotatably
mounted on the shaft |29 and having a crank
arm v|34 connected to the Iouter end" of a piston
rod |35 projecting outwardly from a cylinder
|36 for a purpose to be hereinafter described.
The cylinder is pivoted o-n a bracket |31, see Figs.
3 and 9. ~ The clutch collar |28 is controlled by
a leverî |381pivoted at one 'end on a bracket 14|
j and connected at its other end` with the pro
„
.
j
.Y
bé engagea by a spring pressed laten laarpiyoltçd
to the slide and normally'pressed yinto arm en
gaging position by a coil spring |1|, a handlef|1i2 ~
being provided for releasing the arm |68.
The lower ñnger |64 has a stud |13 ‘projecting
below the finger for engagement with the central
orifice of a blank |14 positioned on the blank
supporting plate |62, and projecting above the
lower finger for engagementin the central'oriñce
J'ecting end of a piston |42 projectingoutwardly 10 of a finished discy |15,'see Fig. `14.
from a ñuid pressure cylinder |43 lwhich is un
der the control of the operator.
'
Y
The mechanism-for feeding the limiting stops '
|66 downwardly so as to reduce the- size of suc
cessive -passes includes a ratchet |44, see Fig. l0, 15
keyed to the gear shaft | |6 and actuated'by a
pawl |45 mounted on actuating lever |46, the
outer end4 of which is connected to the end `of a
piston |41 projecting'upwardly from a fluid pres
sure cylinder |48 pivoted to the upper cross 20
head 22. Af-ter each roll pass, pressure is de
livered to the cylinder |48 to draw the piston |41
After _com
pletion of a rolling voperation the centering stud
4| and collar 42 are raised as shown in dotted
lines in Fig-14 to 11a the‘nnished- disc |15 to the .
position shown in full lines, the slide |55 and
work handlingmechanism being `retracted out- '
wardly, to the left in Fig. 14. A plurality of discsupporting lingers |16 are rotatably mounted on
shafts'l11. È'I’he supports and shafts are vshown
as four in number. The twoat the `front ofthe
work support are geared to a countershaft |18 '
adapted to be oscillated by a crank |19'secured
to the shaft and connected to .a rod I8! extend- `
downwardly, rotating the shaft ||6 and through f ing upwardly through a lug |62, see Fig. 15, on'
the vertically movable roll .supporting slide 23. ' A
vthe gearing connection above described to rota-te
Vthe threaded sleeves |61 and lower the vertical 25 nut |83, or the like, islsecured to the upper end
screw shafts |65 and stops |66 a predetermined
of the rod |8| above the lug |82 sorthat the rod
|8| is raised on upward movement of the carl
After the iinal'fìnishingrpass, the roll carriage
riage 23. Downward movement of the carriage
23 yieldingly presses the rod |8|~` downwardly by
Y 23 is lifted vertically to its uppermost position to
means of a helical spring |84 surrounding the
permit removal of the finished disc. -This upward
movement is lemployed for returning the stops‘to
rod between the lug |82 and a- spring holdin’g`
' their original starting position for the first pass
nut, or the like, |85 secured to the rod; The two
fingers «at the rear are similarly actuated `by
on the succeeding workpiece. As illustrated, this
amount.
.
'
comprises an adjustable screw threaded stud |51
vgearin‘g‘connecting the vertical disc supporting;
adjusta‘bly mounted in the top'of carriage 23 in
'i position .to engage the lower projecting end of a
Ypin |52 normally pressed downwardly by a helical
varm |81,secured to the -lowerr Íend of operating
spring in a cylinder |54 bolted to ythe upper cross
head 22. The upperV end of the pin projects '
shafts |11 to a countershaft |86 and a crank
rod |88 extending upwardly through the roll‘sup
porting. slide and ~adapted toY :be zyieldingly
pressed downwardly by a helical spring |89 in the
through the cylinder in-position to engage the
heel of the pawl |45 to release theV ratchet |44
same manner as described in connection with the 'p '
therefrom,Y leaving-¿the shaft ,H6 free to turn, '
a rolling operation, upward movement of the car
riageY 23 raises the rods |6| and |88 to rotate the
dise.A supporting fingers .|16 inwardlyr todisc en
The operator, through a suitable valve, not shown,Y
then delivers air to the cylinder |36. The-_clutch
collar |28 being inengagement vwith the clutch
Y|33 connected to the piston |35, .the shaft IIS is. '
rotated' through gearing |32 to return the stops
|66 to their starting position.
'
" .,
Y
'
vAfter completion of the finishing pass and upon
I theraising‘ofthe roll-carriage 23 to its upper
most position, the finished disc is removed from
the support 33 and a fresh blank is substituted
therefor.> In the present invention a blank han
dling mechanism operatable from one side of the
mill by a single operator,
provided forrboth
removing the finished disc 'andinserting tl’îe un
rolled blank.- This mechanism is shown'as comÍ
prising a slide |55 slidably mounted at each side
rodrlßl. It will be. apparent that at the end of
gaging position in Figs. 14 and (15,: this occurring
after the stud 4| and Vcollar 42 have raised the
finishedY vdisc above the blank support or roll
table 33 infposition to be engaged and supported
by the lingers.
I
f
‘
'
“By constructing the mill for operation by
single operator, the space at the back of the mill
isleft free and can be provided with a hood IBI
connected Vto any suitable exhaust mechanism '
|92 for removing smoke produced during rolling
by vaporization of the lubricant placedY on the
blanks by the operator.
'
vThe operator ñrst places afresh blank Y|14 on”
the supporting plate , |62. The stud |13 project
on guiderails |56 by 'means of rollers |51 secured ,n ing below the lower finger |64 is'pressed into the
to the downwardly 'depending sides of the slide 60 central orifice inthe blank for centering and
holding the same in proper position. The oper
|55 and mounted between wear plates |58 sup
ported in the guide rails. Handles' |61 are pro
. ator then moves slide |55 and theassociated work
handling mechanism rinwardly to the position
vided for the operator .to move the slide |55 back
shown in Fig.»14. Upon moving inwardly the
and forth. The slide is provided with a blankV
supporting plate'l62 havingnJ perforated yend |63
adapted to support Vand position the blank over
the blank centering stud 4|. A' pair of finished
disc engaging fingers |64 are pivoted to a bracket
v|65 on the slide |55. The upper finger is spring
pressed toward'the other by a ñat'spring |66;
VThe fingers are vertically movable-_around’the
lsupporting pivot |61 and are releasably held in
raised position, shown in dotted lines in Fig. 14,by`an> arm` |68 formed integrally with the lower
finger and extending Vrearwardly. to a position to>
fingers |64 clasp the finished disc |15 which is
being held upon the supporting lingers |16 -and,
thestud |13 projecting above the lower linger.
|64 engages in the central orifice of the ñnished "
blank. VIt should be stated, that prior to moving
the work handling mechanism inwardly to thepositionVY illustrated in Fig. 14,l but after the fina
ished 'disc has been engaged by the supporting
fingers |16,'the disc centering stud 4| and Vele-` `
vating collar 42 have been withdrawn to the full'
line position shown in Fig. 14 so a's to permit the
9e,
2,406,21e
inwardmovement> of theY work handling mech->
anisml and the fresh blank supported thereon.
riod'the iiuid` pressure. cylinder |48, seeFig. 10,
is. actuated to operate pawl and ratchet> |44 and
After the work handling mechanism is moved in
wardly to center the fresh blank over thecenter
ing stud 4|, the latter is again automatically
elevated to the position shown in dotted lines in
Fig. 14. This projects the centering stud. 4|
upwardly through. the central oriiice in the blank
|45 so .as to index Vthe limiting'> stops `|06 down
wardly toV permit the rolls. to approach more
closely to the work support to form a' second pass
|14 causing it to abut against the stud |13 and
somewhat narrower thanthe íirst pass.
When
the carriage 2311's again lowered to bring'the rolls
into engagement with the. blank, the latter are
again moved outwardly on the secondrpass. This
raisefthe nngers |64y and the iinished disc en
rolls the disc into a still. thimier. form with a
gaged thereby into the dotted line position illustrated. When in this position the latch |63
still larger diameter- The. hydraulic control is
such. that the outward movement ofthe rolls on
snaps over the rear edge of the arm |63 and
the second pass in contact with the disc is suiii
ciently greater than on the iirstV pass to accom
modate and roll the'increased diameter of »the
holds the lingers` and disc in elevated position.
Thereupon the-operator retracts the entire mech
anism outwardly; The fresh blank is, however,
held against withdrawal by the centering stud 4|
extending through the central opening in the
blank. As the supporting plate |62 is withdrawn
from under the blank the latter drops on to the
collar 42. The centering stud 4| and collar 42
then being lowered, the blank is located in prop
erly centered position on the roll table or blank
support 33. When the slide |55I is retracted to
its extreme outermost position the iinished'- disc
|15 can be` easily removed from the. supporting
fingers by the operator. A fresh blank is then
placed on the table |62 after which the latch
|69 is released by moving it against the pressure
ofthe springv |1|, permitting the fingers to drop .
into their lower position and placing the blank
centering stud |13 in the central opening of the
disc.
`
This operation can be repeated any desired number of times so as to subject a blank to any
given number of> roll passes. It will be desirable
usually to make each pass successively smaller,
butit will be apparent that reduction in the size
ofthe different passes is a selective operation and
successive` passes of .substantially the-same size
can be employed if, for any reason it is desirable
to do. so. The hydraulic control is suchthat both
rolls are caused to moveY outwardly during each
pass at the same speed s0 that the work done
is substantially equally divided between the dif
ferent rolls. At the same time, any suitable speed
control mechanism can be employed in connec
tion with the motor for rotating the work sup
port so that the speed. of rotation of the latter
new blank.
is graduallyv reduced during the rollingof each
Assuming> that a fresh blank has justbeen
placed on the blank support 33, the operator
manually sets the position of the roll limiting
stops |06 by first admitting fluid to the fluid
pressure cylinder |43, see Fig. 3, to throw the
pass in such a way as t0 maintain the speed- of
theY disc at the point of contact with the rolls
substantially constant from beginning to end` of
any given pass. For example, alresistance |93,
see Fig. 17, in the circuitv of the table driving
motor 38 can be controlled by the roll operating
|22 with the stop controlling shaft ||6. The 40 piston so as tov increase the circuitl resistance
first position of the stops |06 which determines
during rolling to ,graduallyA decrease the motor
the roll pressure and the size of the first roll pass
speed. asl the roll is moved Voutwardly» acrossrthe
is thus set manually in accordance with the
blank. After a» passfis finished, the speed of
thickness of the blank to starty with. A dial, not
rotation of the work support is again raised to
shown, can be connected to the stop setting shaft
correspond with the beginning of the succeeding
clutch collar |28 so as to connect the hand wheel
to guide the operator in thispreliminary setting.
roll pass.
«
The clutch |28 is thenshifted to connect the
It will be apparent that the rolls follow- a sub
shaftIZâ):v with the piston rod |35 through the
stantially rectilinear path> dur-ing the rolling of a
clutch collar |33. Pressure is then admitted to
given blank andthe blank is subject to a succes
the main cylinder 28` and the roll supporting 50 sion of passesin which the> contact of the rolls
carriage 23 and rolls, 61 are lowered, the fluid
therewith is always from thecenter outwardly.
pressure cylinders 86 and` pistons 81 having been
Preferably, the rolls contact the blank inl such
operated so .as to move the rolls inwardly to their
a way that the angle of attack of the material
innermost position as determined by the stops 94
toward the. rolls is from the rear or the outside
¿on the ends of the rods 95, see Fig. 5. The blank 55 of.` the rolls. This! is preferably accomplished
support or roll table 33> is rotated continuously.
by so. mounting each roll’that it moves outwardly
After the rolls are brought into engagement with
of the blank along aline |94 which' is offset from,
the blank near the center thereof, the fluid pres
preferably in lthe direction> of rotation', but par
sure cylinders 86 and pistons 81 are operated to
allel to, a diametral line |95 passing through the
move the rolls radially outwardly across the 60 center of the blank, as illustrated in Fig. 16.
blank during the rolling operation to perform a
Obviously, other arrangements for accomplishing
.combined spinning and rolling operation. The
the same resultare possible. Also, each roll
rolls are preferably moved outwardly to approxi
might be moved along a line offset in the oppo
mately the edge of theblank, spinning and roll
site direction` from the diametral line, or moved
ing the material of the blank in such a way-as 65 outwardly along a diametral line but positioned
to reduce the thickness thereof and enlarge
at an angle thereto. With' such an arrangement
the diameter. The outward movement of the
the angle. of . attack would remain constant
rolls is accurately determined by fluid pressure
throughout the roll pass.
’
control, At'the end of the pass the carriage 23
Mounting each roll `for movement along a line
and supported rolls are raised a small amount, 70 offset from but parallel to a diametral' line can be
approximately 1A; to 1/4 of an inch, to relieve the
accomplished in any desired manner. As illus
disc of rolling pressure and to permit the rolls
to be moved inwardly again to the center'of> the
disc without causing them to backtrack in con
tact withthe material thereof. During: this pe
trated in Fig. 8, a steel backing plate |95'is placed
' in back of the lubricated friction plate 82 at one
side` of th‘e horizontal roll lslide 1|, the parts be’
ing> vso formed. thaty with thev plate in thev position
2,406,219
Il."
'
Y
i
' shown, the roll is offset from the diametral line in
the direction of Vthe plateY a predetermined
amount such, for example, as 1/4 of an inch. If
Y a greater distance of offset is required, it can be
with the une aus for iowenng the piston amiwith'
the line 209 for raising the piston, all in proper
timedl relation to the rolling cycle. A piston
operated switch 225 controls the solenoid 2|2 and
obtained by removing the steel backing plate, .
a second's'witch- 226 controls the solenoid 2'II, d
shifting the roll slide and inserting the backing
plate in back of th'e friction plate on the opposite
the switches being actuated'by suitable arms 221
side - of the horizontal slide.
Obviously, other
arrangements can be employed.
1
' At the end of a predetermined number of
and 228, or the like, connected to the piston 25. ’
' For operating the roll shifting cylinders 86 a
motor ' 23| of approximately l25 H. P. drives a
passes, when the rolling operation has been com
pump 232 of about 36 gallons per minute capac
ity for delivering 'iluid pressure through a sup
y ished disc is removed and a fresh blank'delivered
move the rolls across the surface of la blank being
ply line 233, check valve 236,- and unloaderjvalve
pleted, the carriage 23 is raised upwardly tothe
235 to a solenoid operated four-way valve 236v
extremelimit of its upward movement. At the
adapted to'be actuated by solenoids 231 and 238
same time, fluid pressure cylinder 54, see Fig. 5,
isac'tuated to elevate the centering stud 4I and 15 to deliver fluid pressure through a pressure build
ing valve 239 and line 24| to interconnected iluid
collar 42 .to raise the finished disc into position to
« be engaged by the supporting fingers |16 »which ' motors 242 by means of which equal volumes ofY
fluid are delivered through linesA 243 and 244îto
are moved Vinwardly to disc supporting position
the opposite cylinders 86 to move the> pistons 81
bythe head 23 Vengaging the nuts |83, see Fig. 15,
outwardly during the rolling operation soas to
at the limit of its upward movement. The iin
to the mill by the operator in the manner above
described in connection with the blank handling
mechanism.
’
rolled at equal speeds whereby the work >oi’ roll
ing is equally divided between the difîerent rolls.V `
A discharge line 240 connects the unloader valve .
It vwill-be apparent that various systems »of hy 25 235 with the reservoir 202.
The'solenoid'op'er- '
ated four-way valve 236 is also adapted to con
nect the pressure supply line 233 with a line 245
for delivering fluid pressure to the outer ends of
the cylinders 86 for moving the ‘pistons 81 and
rolls inwardly `to their starting points.V It isrto
be noted thatthe two sections of each piston rod
sump or oil reservoir 202 through a line 203, low
81 are of different diameters so that thevinward
pressure unloader 204, check Valve 205 and pres
movement of the pistons and rolls will'be at ’aV
sure Vline 206 to. a solenoid operated four-way
relatively high speed and the outwardworking
valve 201. 'The valve 201 is connected. by line
206 to the pressurev cylinder 28 above the head, of 35 movements at' a considerably reduced speed.v ÍA
speed regulator '246 is connected across the lines
the piston 25, and by line 269 to the cylinder 28
24| and 245 for controlling the `volume flow there
belowthe piston head. _ The four-wayA valve is
in. A series of switches 241 actuated by a switch
adapted to be operated in the usual manner by
arm 248 movable with oneof the pistons 81" are
solenoids 2I| and 2I2 to connect the pressure
'supply line 206 with one or the- other of the cyl 40 so arranged as to ycontrol the energizing: and de
energizing of thesolenoids l231 and 238 so that
inder operating lines'208 or 209, and to connect
the pistons are moved in and out duringv ¿rolling
the other of such lines with the discharge line 2 I 3
operation-to impart to the rolls the movements
leading tothe oilv reservoir. The low pressure
herein above described, whereby on successive
unloader valvev 204 is also connected to the pres
"sure supply line 206 by line 2|4, and a discharge 45 passes the rolls move outwardly increasing dis
tances corresponding with the increasing diam
line 2I5 connects the unloader with the oil reser
eter of the blank being rolled. A pressure oper
voir. f The motor 200 is provided for rapid trav
draulic control can be employed for operating a
mill in the manner set forth.
' One such system is diagrammatically shown in
Fig. 18 and comprises Aa motor 200 operating a
pump 20| for pumping fluidY such as oil from e, 30
erse of the roll carriage 23 supported on the pis
ton 25. It may be a 10 H. P. motor and the pump
20| have a capacity of approximately 20 gallons
per» minute. A pressureggauge'ZIG is connected
to the pressure supply line 206 through a gauge
cock 2 I 1.V
'
'
A second motor 2I8 is provided to apply rolling
pressure to the rollsthrough the piston 25. It 55
drives a smaller capacity pump 2 I 9 for delivering
i'luid pressure from the oil reservoirv through a
' ated switch 25| is connected to the cylinder 28
above the piston 26 to stop operations if the pres'
sure builds up above'a predetermined maximum.
Various electrical control systems can be em
ployed and it is not necessary to illustrate or de
scribe them' in connection with this disclosure
inasmuch asfthey form no part of the present
invention.
'
,
-
Although we have described in detail one spe
ciiic arrangement of rolling mill,Y it will be ap- »
connecting line 22 I, check valve 222 and unloader
parent that the present invention can be vari
valve 223 to the supply line 206 leading tothe
ously m'odiñed and adapted within. the scope of
four-way valve 201.Y The motor 2I8 is prefer 60 the appended claims.
ably of about 5 H. P. and the pump 2|9 has a ca
What We claim i‘si`
pacity' of about 21/2> gallons` per minute. A line
1. A rolling mill comprising arwork support, a
224 connects the pump 2I9 with the operating
roll for forming a blank on said work support, a
chamber of the unloader valve 223 so that when
vertically movable roll supporting` carriage, means
the pressure on the pump 2|9 reaches a certain 65 for reciprocating said carriage vertically, a stop
maximum the unloader 223 is operated to con
for limiting the downward movement of said car
nect the pump supply line 22| with the oil reser
riage, screw means for adjusting and determin
voir through' a discharge line 224’ and relieve
ing the position of said stop, means Vfor manually
the line 206 of excess pressure.
' '
ï
operating said screw means to limit the first
Operation of the above-described mechanism 70 downward movement of said carriage land de
is controlled through a conventional type of elec
termine the size of the ñrst roll pass,.and means
trical system, not shown, by means of which the
operated by the reciprocation of said carriage
pistonv 25 causes the four-way valve operating
for adjusting said stop to reduce thesizeof’suc-gl
Vsolenoids 2I| and 2|2 to be alternately energized
ceeding working passes of said roll.
'
' d
`
forv alternately connecting the pressure line. 206V 75 2. A 'rolling‘mill comprising a work support, a
2,406,219
I4
13S
positioned to limit the downward movement of
said carriage thereby` to determine Vthe dimen
vertically movable roll supporting carriage, means
sion of the pass between said roll and said work
for reciprocating said carriage vertically, a stop
support. and means for operating said screw
for limiting the downward movement of said car
riage, screw means for adjusting and determin 5 l'shafts in timed relation to the movement of said
:carriage to position said stop members and limit
ing the position of said stop, means for manually
the movement of said carriage at any predeter
operating said screw means to limit the ñrst
mined point.
downward movement of said carriage and deter
8. A rolling mill comprising a work support,
mine the size of the ñrst roll pass, and means for
,a roll for forming a blank upon said support,
returning said stop to starting position after each
a vertically movable roll supporting carriage,
disc rolling cycle.
¿means for raising and lowering. said carriage to
3. A rolling mill comprising a work support, a
roll for forming a blank on said work support, a
move said roll into and out of working engage
roll for forming a blank on said work support,
ment with a blank on said support, guide posts
a vertically movable roll supporting carriage,
means for reciprocating said carriage vertically, 15 for guiding the movement of said carriage, screw
shafts, stop members threaded to said shafts and
a stop for limiting the downward mo-vement of
positioned to limit the downward movement of
said carriage, screw means for adjusting and de
said carriage thereby to determine the dimension
termining the position of said stop, means for
of the pass between said roll and said work sup
manually operating said screw means to limit the
first downward movement of said carriage and 20 port, and means operated by the movement of
said carriage for moving said stop members to
determine the size of the first roll pass, and means
progressively change the limit of movement of
operated by the reciprocation of said carriage for
said carriage.
«
adjusting said stop to reduce the size of each suc~
9. A mill for rolling discs comprising a support
`cessive working pass of said roll.
4. A rolling mill comprising a work support, a
roll for forming a, blank on said work support,
a vertically movable roll supporting carriage,
for a blank having a central perforation, a roll
for forming a blank on said support into a finished
means for reciprocating said carriage vertically,
a stop for limiting the downward movement of
’ adapted to enter the perforation of said disc for
raising a finished disc above said support, means
disc, means including a vertically movable pin
said carriage, a screw shaft for adjusting and 30 for holding said finished disc in raised position,
and a blank handling mechanism movabletoward
determining the position of said stop, means for
and from said support, including means for posi
manually operating said screw shaft for posi~
tioning said stop, means operated by the recipro
cation of said carriage for rotating said shaft to
tioning a blank on said> support, and means for
gripping a nnished disc in said raised position to
retract the same, aiter lowering of said pin, upon
movement of said mechanism away from said
move said stop, and a clutch for selectively con
necting said manual operating means to or dis'
support.
connecting it from said screw shaft.
5. A rolling mill comprising a work support, a
roll for forming a blank on said work support, a
10. A mill for rolling discs comprising a support
for a blank having a central perforation, a roll
for forming a blank on said support, means for
raising a finished disc above said support, means
for holding said disc in raised position, a blank
handling mechanism movable toward and from
vertically movable roll supporting carriage,
means for reciprocating said carriage vertically,
a stop for limiting the downward movement of
said carriage, means for adjusting the position
of said stop, means for manually operating said
adjusting means so as Vto set said stop to limit
the downward movement of said carriage and
__determine the size of the ñrst roll pass between
said roll and said work support, a pawl and
ratchet mechanism actuated by the reciprocation
of said carriage for operating said adjusting
means to reduce the size of succeeding working
passes of said roll, and means for selectively con
necting said manually operated means to or dis
connecting it from said adjusting means.
6. A rolling millV comprising a work support,
a roll for forming a blank on said work support,
a vertically movable roll supporting carriage,
means for reciprocating said carriage vertically,
a stop for limiting the downward movement of
said carriage, a screw shaft for adjusting the po
sition of said stop, a gear train for operating
said screw shaft, a hand wheel for operating said
gear train, a pawl and ratchet mechanism actu
LA
said support including a blank supporting plate
adapted to position a blank on said support,
gripping means adapted to engage the finished
disc in its raised position, and a blank centering
pin movable into the perforation of said blank
for retaining the same on said support upon move
ment of said mechanism away from said support.
l1. A mill for rolling discs comprising a support ,
for a blank having a central perforation, a roll
for forming a blank on said support, means for
raising a finished disc above said support, a plu
rality of rotatably mounted fingers movable into
position to hold said disc in raised position,- a
blank handling mechanism movable toward and
from said support including a blank supporting
plate adapted to position a blank over said sup
port, a blank centering pin movable into the per
foration of said blank to hold same on said sup
port, upon retraction of said plate, flexible disc
gripping arms movable into position to engage
said disc upon movement of said mechanism to
ated by the reciprocations of said carriage for op
erating said gear train, and a manually controlled
clutch for selectively connecting said hand wheel
ing said perforation on said disc, said pin being
to or disconnecting it from said gear train.
movable to elevate said arms to raise said disc
’7. A rolling mill comprising a work support,
a roll for forming a blank upon said support, a
ward said support, means on said arms for engag
away from said supporting fingers, and means
for releasably holding said arms in elevated posi
.vertically movable roll supporting carriage, means 70 tion to permit removal of said disc upon move
ment of said mechanism away from said support.
for raising and lowering said- carriage to move
12. A mill for rolling discs co-mprising a sup
said roll into and out of working engagement
with a blank on said support, guide posts for
port for a blank having a central perforation, a
roll for forming a blank on said support, means
guiding the movement of said carriage, screw
shafts, stop members threaded to said shafts and 75 including a pin cooperating with the perforation
2,406,219
Y15
in a blank for centering a blank on said support, '
f a plurality of rotatably mounted fingers movable
into position to hold said ldiscV in raised position,
'16'
~
Y
carriagecontrolled means for returning' said stops
to their original starting position.
'
16. A rolling mill comprising a bed, a Work sup- - »i
a blank handling mechanism movable toward and
port on said bed, a roll for forming a blank on
from said support including a bifurcated blank
said work support, a vertically movable roll sup
portingY carriage adapted to move Vsaid roll intoy
and out of engagement with a blank on said
supporting-plate adapted to be moved inwardly so
as to position a blank over said pin when'said
‘f pin is retracted, flexible disc gripping arms pro- \
vided with a perforation engaging Vstud movable
into position to engage said disc in raised position
upon movement of said mechanism toward said
support, means for raising said pin through the
perforation on said blank to engage said stud
and elevate said arms to raise said disc away from
said supporting lingers, and means for releasably
holding said arms in elevated position to permit
removal of _ said disc upon movement of said
mechanism away from said support.
Y
"
work support; meansV for moving said carriagev
vertically, adjustable means for limiting the
downward movement of said carriage, and a
Vselectively operable manualy Y and automaticY
means for adjusting the position of said move
ment limiting means.
,
'
`
'
17. A rolling mill comprising a rotatable sup
port 'for a blank Yto be rolled, a roll for form
ing a blank on said support,rmeans for moving
said rollv outwardly across the blank a plurality
of times to make successive rolling passes, power
13. A mill for rolling discs comprising a support
operated means for feeding said roll toward the Y
for a blank having a central'perforation, avroll 20 support between successive passes, stop Vmeans
for forming Va blank on said support, a vertically
for limiting each successive feeding movement to
movable roll supporting carriage for moving said
a predetermined amount, and power means, op
roll into and out of rolling engagement with a
erative between successiveepasses and during the Y
blank on' said support, means for raising a finished I
continuous operation of the mill, for adjusting
disc. above said support, a plurality> of rotatably 25 said stop means a predetermined amountlfor
the next succeeding pass.'y
mounted ?lngers'movable into position to hold ,
s’aidv disc in raised position, a blank handling ,
l8.'A rolling mill comprising a rotatable .sup
port for a blank to be rolled, a roll for forming
mechanism movable toward and away from said y
support including a blank supporting plate adapt- ,
a blank on the support, means for moving said `
ed' to position a blank over said support, a blank 30 roll outwardly across said blank a plurality of
times to Vmake successive rolling passes, power
centering pin movabl'einto the perforation of said `
operated mechanism for feeding said roll toward
blankv to hold same on said support on retraction
of said plate, flexible disc gripping arms movable
lsaid support between Vsuccessive passes, a me
into position to engage said disc upon movement
chanically controlled stop for limiting successive
of said mechanism toward said support and to- re- : feeding movements to a predetermined amount,
move the disc from said fingers upon movement
and power means, operative between successive
of said mechanism away from said support, and
roll passes and during thecontinuous operation
of the mill,Y for adjusting said stop and deter
means actuated by the movement of said roll sup- ‘
` porting carriage for moving said fingers into and
mining the position of the roll on the next suc
out of disc holding position.
.
ceeding pass.
14. A rolling mill comprising a work support, a
vertically movable carriage above said work sup
port, artransverselyV movable roll supporting slide l
, mounted on said carriage for horizontal move
‘
e
l
`
ment, a roll supporting shaft mounted in -said
slide, a rollon said shaft for forming a blank on
said work support, mechanism for moving said `
roll and slide radially of said carriage including
'
19. A rolling mill comprising a rotatable sup
port for a blank tov be rolled, a roll for form
ing a blank on said support, means for moving
said roll outwardly across the blank a plurality of
times to make successive rolling passes, means
for feeding the roll toward the support between
successive passes, stop means for limiting each
successive feeding movement to a predetermined
‘ a iiuid pressure mechanism having a piston-rod
amount, powerY means, operative between suc
in line with said roll'shaft, and a iìexible con
1 nection between said piston rod and said roll
‘ shaft, including a split collar surrounding the
@abutting ends of said rod and shaft and hav- `
cessive passes and during the continuous oper
ing flanges engaging grooves therein.
»
15. Arrolling mill comprising a bed, a work
p support on said bed, a roll supporting carriage, e
i a roll for forming a blank on said support and
movable with said carriage into and out of rolling `
engagement therewith, means for moving said
‘ carriage vertically, adjustable stops for limiting 60
j the downward movement of said carriage, and
ation of the mill, for adjusting said stop means
a predetermined amount for the next succeed
ing pass, and control means operated by the
outward traverse of the roll to increase said out
ward traverse on each succeeding pass by a pre
determined amount and in accordance with the
increase in diameter of the blank being rolled.
FRANKLIN R. HIGHI‘. `
c
ROBERT o. GREENsHIELDs.
FRIEDRICH J. MUmLLER.>
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