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Nov. 5,-1946.
' >
P. P. M.’ DuéoscLARD
Filed Sept. 1, 1944
'6 S_heets—Sheet‘l'
3 g;
Nov. 5, ‘1946.
‘ ‘
Filed Septfl, 1944
6 Sheets-Sheet 2
g’@_ M ‘can ,. ATTORNEY‘;
Nov. 5, 1946.
Filed Sept. 1, 1944
6 Sheeté-Sheet 5
Pic]. 3 .
PAUL p lg, DuBoscLARo v
NOV. 5, 1946.
' Filed Sept}; 1, 1944
6 Sheets-Sheet 4
Nov. 5,1946.
Filed Sept. 1, 1944
6 Sheets-Sheet 5
I56 10 use 160
PAUL P. hgYDueoscLAno
Nov. 5, 1946.
_ Filed Sept. 1, 1944
6 Sheets-Sheet 6
Patented Nov. 5, 1946
Paul P. M. Dubosclard, Buffalo, N. Y.
Application September 1, 1944, Serial No. 552,291
13 Claims.
This invention relates to forming rolls, and
more particularly to improvements informing
rolls for processing sheet metal stock and the like
into varyingly curved sectional shapes.
(Cl. 153-54)
is adapted to be operated by relatively unskilled
workmen to produce 'large quantities of variously
curved sheet metal pieces such as airplane wing
leading edge skin sheets or fuselage skin sheets
One of the objects of the invention is to pro 5 or the like in improved manner.
vide a powered sheet rolling mill of improved form
In the drawings:
which is capable of handling relatively large size
Fig. 1 is a front elevation of. a forming roll of
stock sheets and imparting thereto in improved
the invention;
manner variously curving sectional forms. An
Fig. 2 is an enlarged view of the right hand end
other object of the invention is to provide an im 10 portion of the mill of Fig. l, with portions broken
proved forming roll which is adapted to form a
away to show operative mechanism in section;
?at stock sheet automatically into a prescribed
Fig. 3 is an enlarged View of the left hand end
varyingly curving contour during a single pass
portion of the machine of Fig. 1, with portions
through the machine. Another object of the in
broken away to show operative mechanism in sec
vention is to provide a machine of the character 15 tion;
described which is adapted to operate in im
Fig. 4 is a fragmentary section, on an enlarged
proved manner to form stock sheets into chord
Wise sectionally curved forms, either tapering or
scale, taken along line IV—IV of Fig. 1 ;
Fig. 5 is a fragmentary section on an enlarged
non-tapering in spanwise directions.
scape taken along line V—V of Fig. 1;
Another object of the invention is to provide 20
Fig. 6 is a fragmentary end elevation of the
an improved machine of the character aforesaid
which is adapted to single-pass a stock sheet
therethrough to form such stock sheet to curve
mechanism of Fig. 3;
Fig. 7 is an enlarged view, partly in section, of
an automatic roll levelling and control device
sectionally to varying degrees chordwise of the
located centrally of Fig. 1;
sheet without requiring operator-attention to the 25
Fig. 8 is an end elevation of a manual control
roll settings of the machine intermediately of the
device portion of the machine;
rolling pass. Another object of the invention is
Fig. 9 is a diagrammatic illustration of the hy
to provide a forming roll for the purpose afore
said which is adapted to roll ?at sheet stock into
draulic control system of the mill; and
Fig. 10 is a perspective of a typical curved sheet
relatively sharply curved shapes with improved 30 product formed upon the mill of the invention.
~ _
The invention is illustrated by the drawings to
Another object of the invention is to provide
be embodied in a forming roll comprising a bed
an improved forming roll of the character afore
constructed of parallel side ‘beams lll—l0 and
said which is adapted to more uniformly process
spacers [2 extending transversely therebetween
stock sheets accurately into curved shapes and 35 at intervals longitudinally of the beams. The bed
at increased speed when attended by only rela
is ‘supported above the floor line‘for convenient
tively unskilled operating personnel, compared
operator feeding of stock sheets to the mill by
to other manual or mechanism-controlled ma
means of pedestals [4. The stock contacting roll
chines of the prior art. Another ‘object of the
system of the machine comprises a group of three
invention is to provide a forming roll of the char 40 rolls disposed in parallel relation and extending
acter aforesaid which is adapted to be set to
lengthwise of the bed at a position generally cen
automatically process, in improved manner, a flat
trally thereof. The rolls are grouped so as to
sheet stock into a variously curved sectional form
comprise a pair of spaced bottom rolls l 6—l8 and
during a single pass of the stock sheet through
an upper roll 20 carried at a position above and
the machine.
Another object of the invention is to provide an
improved automatic operation control mechanism
in rolling mills and the like whereby a positionally
adjustable roll element thereof is automatically
controlled to maintain substantially equidistant
spaced relations at opposite ends thereof with
respect to a positionally ?xed roll element of the
mill. Another object of the invention is to pro
.vide a forming roll of the character aforesaid
which incorporates adjustable and automatically -
operating cam and stock sheet positioning de
vices for accurate control and synchronization of
intermediately of the positions of the bottom
ro ls.
The upper roll 2|] is carried by a beam 22 which
is in turn suspended at its opposite ends from
posts 24—26 extending upwardly from the bed
of the machine. The beam 22 is keyed to the
posts 24-46 by means of vertical key slides
28-4-28, and its vertical disposition is controlled
by adjustable link mechanisms which will be de
scribed in detail hereinafter, whereby the ele
vational positions of opposite ends of the roll 20
are selectively controlled by adjustments of the
suspension link devices, as will also be explained
in detail hereinafter.
the cam and stock sheet actuating operations.
A more speci?c object of the invention is to pro
‘ The upper roll 20 is supported by the beam 22
vide an improved sheet metal forming roll which so by means of a plurality of paired roller bearing
devices 30-39 which are carried by brackets 32
extending along the bottom edge of the beam 2?.
at intervals longitudinally thereof so as to sup
port the roll Nagainst undesirable de?ections
during stockrolling processes.
The bottom rolls Iii-l8 are similarly mounted
upon paired roller bearings 34-35 carried by .
drive the rolls against the stock sheet in the same
direction and at approximately the same periph
eral speeds. Thus, it will be understood that
whenever a stocksheetisrplaced in ‘position be
tween the'rolls, “and the'upperiroll' is lowered so
as to bend the stock sheet into the space between
, the bottom rolls, the rolls will thereupon pull
brackets 38 bolted to top plate members 40-49 . . the stock sheet through the machine while im
' parting a curved sectional contour to the sheet
at intervals longitudinally thereof, whereby to
support the rolls Iii-l8 against undesirableider 10 throughout its length and width.
To adapt the machine to roll stock sheets to
relativelyshort radii the upper roll 20 is provided
to be of as small diameter as possible while still
ably mounted upon the cross bars H of the bed
being su?iciently rigid against de?ection inter
so as to be adjustable
directions transversely
mediately of its supporting brackets 32. How
of the bed to vary the distance between the rolls
ever, the diameters of the bottom roll l6-—l8 are
iii-l8." To control such adjustments of the posi
not as critical in ‘relation to the problem of form
tions of the rolls l?_'—l8 the top plates lit-4B
ing stock to short radius curves, and it'is there
are ‘provided with‘mresaeu bosses 42 (Fig. '5)
fore usually practicable to provide the bottom
engaged‘by screws M which arejoumana as at
45 upon the bed‘ and arranged to be manually 20 rolls 16418 to be of larger diameters so as’to
provide vtherein larger factors of safety against
controlled by calibrated hand wheels '5ll‘—50.
undesirable de?ection’ intermediately of their
Thus'it will be understood that manipulations
supporting brackets 38.
of the hand wheels 59 willproduce corresponding
?ections under the stresses of sheet stock roll
ing operations. The top plates 130-49 “are ‘slide
lateral ‘adjustments of the top plates fit-‘40cm
ryin'g the bottom rolls‘ 1 ?-l-l?ja‘ndthat the ‘plates
. 4944!!" ‘may thereby Toe-Selectively adjusted rela
trve ‘to 'the'bed ‘at' either or both "ends ‘thereof
tofiiro'cur‘e any desired plan view alignment of
the bottom rolls 'l6—'|'8 relative ‘to thé mill'béd.
Thus, not only may the distance between the
rolls ‘I 54-41 8‘ he adjusted-abut also the directional
alignments ftherle'of‘ relative ‘futile "bed ‘may be
To control the elevation of the upper. roll 20
. throughout its length relative to the bottom rolls
l6—l3 and to thereby regulate the depth of
pressing of the stock between the bottom rolls
which in turn regulates the sectional contour of
the finished stock‘ piece, the roll carrying beam
22 is suspended at its opposite ends from the
support posts 24—26 by'r'neans of separate ele
vation-adjusting linkage devicest‘ For example,
selectively adjusted "as required ‘for. proper ‘proc
as shown in Figs. 3and6, the ‘beam suspension
through lateral slotted portions‘ of "the plates
48;“); and ‘backing ‘up ‘screws ‘52 are ‘provided
to bolster the plates M4140 dispositions ‘inter
mediately of the position'srof‘the hand ‘wheels '50.
'The rolls 164-18 are‘arr‘anged 'ajdj'a‘cer‘it their
extreme end portionsjto ‘be ‘journaled ‘upon their
corresponding, top plates ‘?ll-‘J59 by means of
bearingrblocks '53j—\53 (Figs. '2-'-3v—'5), and the
topro‘ll‘z?‘isfsimilarly journaled upon the top
beam v22 'a‘tftheextreme "opposite ‘end portions
of ‘the roll ‘2!; ‘by means of ‘stirrup blocks ‘54454.
link 88 pivotally connected by a pin 82 at its
linkage at the left hand ‘end portion of ‘the ma
essing of variouslyfcontoure‘d stock ‘sheets. Lock
'ihg belts ‘5 I ‘are provided" to extend ‘from "thefbed ;, chine as viewed inFig._.1 includes a suspension
inorder to insure ev_en"pulling away from the
work between sheet rolling ‘operations ‘the ‘top
roll?2ll ‘may be additionally suspended "from" the
‘beam '22 'intermediately ‘of ‘the bearing ‘blocks
‘54-454 'by means of ‘straps or magneticfdevices,
as preferred. The top roll 201 is arranged ‘to be
power vdriven by ia‘universally jointed ‘intermedi
ate shaft "56 ‘(-Fig. 3) , while the lower'r'olls Iii-l8
‘are arranged to be driven ‘by similar universally
lower end to the beam‘ 22 and by .means of a
pin‘ 8:} at ‘its upper end to one arm of a rocker
85. The rocker‘ 85 is pivotally'mountedjat 86
upon a bracketlexten'ding from the frame post
24, and ‘a second armv of the rocker '85 pivotally
connects at 31 to thepiston rod 88 of a hydraulic
cylinder 90.‘ ‘The cylinder '90 is carried by a
_ rocker bracket 92 ‘extending from the frame
post 24 so as to ‘be automaticallyadjustable into
proper directional alignment with the pivot'con
nection '8’! at all positions of the rocker.
A third arm' 95 of the rocker 85 pivotally con
‘ nec'ts at 95 to a link '95 'which'extends downwardly
therefrom into pivotal connection at 91 to the
upper end of a pitman 987 which is mounted to
be vertically slidable upon the machine frame
and to carry ajroller 99 disposed to bear upwardly
against the underneath surface of a cam plate I00.
. Paired rollers IiSZ-IUZ (Fig. 6) are carried by the
machine frame to guide vertical motions of the
pitman 98;; and the cam track I00 is detachably
mounted upon a carrier bracket H14 which is dis
gear BZ‘meshing with corresponding spur gears
posed between paired horizontal guide rollers
'GQf-B'g carried by {stub shafts ‘ 66-456 connecting
to the corresponding intermediate shafts '58-—158 60 lode-I86 for mounting the carrier and cam lllll
upon the ‘machine frame "to be freely 'slidable in
of the lower rolls. The upper stub shaft 60 “is
horizontaldirections transversely of the end view
fitted with‘ a sprocket ‘and 'chaindrive device 68
‘jointed 'interm‘ediatejshafts ‘58-58; The shaft
'56 ‘connects through aistub shaft 60 toxa spur
which‘engages alcountershaft 10 (Fig. '3) ‘cou
of’t'he machine. The cam carrier is also formed
‘device 12 ‘which ‘in turn is driven as by an electric
motor 15. The motor and-gearbox and ‘drive
‘shaft ,devicesjare all ?rmly-mounted upon‘ a base
‘plate ‘l'dwhichjs carriedjby pedestal portions [4
with a spur gear Hi1 carried by one end of a
drive shaft H2 which is journaled upon the
pled to the outputshaft of a, speed reducer igear
of ‘the machine frame.
Thus, 'it willbe understood that operation of
the-motor ‘l?will'cause the rolls "I6,"l8, 20 toibe
individually driven so as :to ldriveja stock sheet
inserted therebetween as shown‘inFig. 4-‘to pass
with aytoothed rack portion I08 which meshes
machinefframe and ‘extends substantially from
one end to'the other thereof. The drive shaft
H‘; carries a sprocket 1 I4 engaging a drive chain
‘H5 ‘which is geared _'toea‘sprocket"l [6 carried by
‘the motor drive "shaft ‘iii, whereby itwill be
vun'derstiood that whenever the motor???» is started
to drive the rolls_l-6,~‘|_3, 2B, for passing a stock
‘sheet theréthrou‘ghfthe‘ card 100 will be simul
‘over “the ‘ lower ‘rolls {and ‘below’ the ‘upper roll.
3The vgears are so arranged “and-selected as'to 75 Itanecusly driven to move horizontally-and in’ the
231. ropes”.
same general direction as theimove‘rnent of the‘
alsoso arranged‘ that upon turning of the control:
stock sheet, and in synchronism therewith. I
linkage and elevation control cam and cam dis-'
handle thereof'so‘ as‘ito rotate the valve core away
from‘, the “off” position‘ thereof and in counterclockwise direction‘ as .viewed in Fig.9, the pres
placing mechanism identical to the mechanisms‘
of ‘Fig. 3 at the left hand end of the machineare
furnished in conjunction with the right hand end
sured ?uid traveling through the supply conduit
I45v will .be‘div'erted into a conduit I50 leading
intoopen' communication with paired conduits.
‘As illustrated by Fig. 2, a top roll suspension;
I 5'I—I 5B'whichin turn connect respectively to cyle
inder feeding conduits I59—I 60. Check valves? as
ignate ‘operative elements corresponding to the 10 indicated rat? I6i—-I6I are provided in each of the
hereinabove described operative elements of Fig.
conduits I52-‘—I53—I51—-I58, and spring devices
3. .As in the case of the driving pinion I I0 inFig.
as: indicated. at I02 are coupled to the valve car
3,‘the cam driving pinion H0 at the right hand
rying block I 34v for biasing the‘latter toward a
end of the machine is keyed to the drive shaft
centralfposition between the cylinders I40—-I40.
H2 which extends to both ends of the machine
Thus, it will be appreciated that whenever it
frame‘ as explained hereinabove, whereby it will
isdesired to raise or lower the upper roll 20, the
be understood that the cam devices at ‘both the
control-valve I44 is simply manually turned ei
right hand and left hand ends of the machine
ther, clockwise or counterclockwise away from.
are arranged to be simultaneously driven to be
the “oil” position thereof shown in Fig. 9. For
displaced horizontally in directions correspond 20 example, if the valvelis so rotated as to divert the:
ing to the direction of stock sheet movements
pressured ?uid from the conduit I45 into the con-v
through the machine, and in synchronism there-'
duit'I-BI, the ?uid will then force through the
check valvesIBI of the conduits I52—I53 and
The'hydraulic cylinders 90——90 are arranged
into the cylinder feeding conduits I54—l 55 which
to be controlled by a hydraulic system asillus
are shown to connect into the’upper ends of the
trated in Fig. 9, and the control system includes
cylinders 90—90 atv the opposite ends of the roll
an automatic upper roll levelling feature which
support beam 22. Simultaneously with such ro
insures that whenever the machine is opened up
tationof the control valve I44, the conduit I56
to receive a new stock sheet the upper roll is ele
willbe brought into open communication with
vated throughout its entire length substantially‘ 30 thepumping system return conduit I41, whereby
equidistantly relative to the bottom rolls. For
it will. be understood that the pressures under
this purpose a push-pull member I20 pivotally
the pistons of the cylinders 90-‘90 willbe 're-.
connects to an arm of each of the rockers 85-85
liev'ed; The ?uid below the piston in the right
and extends vertically therefrom into correspond
hand cylinder is permitted to. drain through the
ing pivotal connections with bell-cranks I24.—I24 35:conduit I50 and into the left hand cylinder I40
carried by the machine frame. .The opposite ends
and thence into the return conduit I56, and-at‘
of the bell-cranks I24-—I24 pivotally connectto'
the same time the ?uid under the piston of the.
push-pull members I20—.-I26 which extend, re
left hand cylinder 00' drains through the conduit
spectively, into pivotal connections with opposite
I60 and thence into. the other end of .the cylin-‘
ends of a differential lever I30 (Figs. 7-9) which 40 der I40 whichis to- the left of the differential
is fulcrumed at I32 upon a block I34. The block
lever I30. Under such conditions the check
I34 is keyed to a pair of oppositely directed rods
valves' IOI--I6I' in the conduits I'5'I—-I58 will au
I35—-i30 which carry valve heads I38-I38 slid-'
tomatically close; upon commencement of such
ably mounted within cylinders I40--I40. Each
drainage operations so as to prevent the draining
portion‘ of . the roll carrying beam_22; 'and‘like
reference numerals are employed in Fig. 2 to des-J
of the valve heads I38—I38 isformed with. a 45 ?uid from passing therethrough.
‘As long asthe beam 22 moves so as to remain.
bifurcated ?uid port I42 .(Fig. '7) therethrough to
permit equalization of ?uid pressures at opposit
substantially level relative to the lower rollsi
I6—I8 the ori?ce I42 through the valve heads
. The top roll elevational control system of th
I38 in the left hand cylinder I40 permits the ?uid
mechanism of the invention is arranged to be 50 draining from the conduit I60 to join the?uid
operator-controlled by any suitable four-way '
draining from the conduit I59 and to passinto'
valve as indicated at I44 (Figs. 1, 3, 9).. As shown
the return conduit system I56-I4'I. Therefore
sides of the valves.
, "
in Fig. 9, the inlet port of the valve I44 is con
pressure differentials are established at opposite
nected to a ?uid conduit I45 leading from the
sides-of the pistons in the cylinders 90—90 which‘
output side of a pump I46. A ?uid return port 55 operate to lower the pistons and to raise both
of the valve I44 is connected to a return conduit
ends of the roll support beam 22. If however .
I41 leading to an oil reservoir I48 which is in
the beam 22 tends to move faster at one end than
turn connected to the intake side of the pump
at the other, the automatic leveling feature of
I45. A pressure relief valve I49 is installed in the
the device will function to retard the excess mo
conduit I45, and the over?ow port thereof con; 60 tion so as to bring the opposite ends of the beam .
nects to a return conduit I50 leading back to the
22 back into leveled relation.
For example, if the right hand end portion of
whenever the control valve I44 is in “off” posi
;he beam 22 tends to rise faster than the left
tion as indicated in Fig. 9, the pump I46 'will 65 hand ‘end, the linkage and bell crank system com
simply circulate ?uid through the‘conduits I45
prising the elements B0—85--I20—l24 at thev
I41 and the reservoir and pressure relief connect- '
right hand end of the machine will displace the
reservoir I48. . Thus, it will be understood that
ing devices.
corresponding push-pull member I26 at a rate
greater than'the coincident displacement of the
The valve I44 is so arranged that upon manual
turning of the control handle, such as for example
opposite member I26;7and this differential action
to rotate the valve core clockwise as viewed in Fig. 70 will rock‘ the central ilever I30 toward the left'
9, the pressured ?uid traveling through the con
about its'pivotal connection to the left hand link ‘
duit I45 will be diverted into a conduit I5I lead
I20’as a‘ fulcrum. Thus the block and valve unit
ing into open communication'withSpaired con- '
I3-6.-'-I38’—I38 will be displaced to the left . as
duits I 52-I 53 which connect respectively into cyl- I
viewed in Fig. 9 against the action of the central
inder feeding'conduits l54—'-'I55'.T The valve “Ms 1 75 izing springs I62-I62. Such movements to the
2,4 10,608 '
leit; ohthe valves. I 3.8;—. 1.38;.will ;.thr.0ttle. the port
eta-inlet- into-the left hand. cylinder. I40; from. the
tion the. .switch 'controllingthe .pump motor is
closed and the control. valve; handle I44. is. then
conduit- I59 without .:disturhing. free‘. passage of
rotated to. :“downf‘ position, I whereupon the pres
draining; fluid, through the :conduit; .I??; Thus,
the downward motiongof the; piston in. the right
sure cylinders Elle-9.0 will. operate to lower, the
5 upperzrollinto pressing relation against the lead
hand :cylinder. at :will . lie-automatically; retarded
ing..edge..of thework. sheet. and to simultaneously
raise rthecam following-rollers 59-99 up against
relative to the rateyof ‘motion of: the left. hand.
cvlinder...piston..unti1 suchtime .as. the two ends
the;.cam;-tracks IEliI'—'I00_, The pressure exerted
ofthe Troll? support beam‘ '22..‘ ‘return to. relatively
bythe upper. rollag-ainst thework sheet is regu
level '2 positions, whereupon; the a leveling mechas 10 latedby thepressure within the hydraulic. sys
nism?will be..automaticallyreturnedto a neutral
tem'las controlledby the setting of the pressure
position; asiIIustrated-in Fig.9; This le'vleling
reli'e'fvalve I48; Thehand wheels I68—I.68 may
then. be ‘adjustedif necessary, to provide the pre
mechanism permits thebeamto deviate slightly
from perfectly level relation, such asmay benec
scribed: degree. of worksheet, de?ection at each
es'sary to. allow thgupper roll to ‘follow diiferent 15 station onqthe cams; and the sheet forming op
eration will then proceed immediately upon man.
cam shapes at opposite endsoithe beam; but'the
“leyelingf’jdevice in any case prevents the upper
ualrotation of the. motor ‘control switch I52.into
operative. position; The rolls IS-IS-Zil will
beam from “cocking? tosuch degree as would
result in its jamming ‘between the end posts.
thereupon The drivenv to pull the work sheet
Whereas, the. description herein has so far-been 20 throughthe. machine while thecams. mil-I 60 will
limited to reference to operations of the hydrau
hesimultanwusly driven to. move in synchro
lic controlsystem to provide. raising of. the upper
nism'With-the. worksheet to control the cam fol
roll '20,'itwill‘be understood that manual turning - lowing rollers 99-99 for regulating the eleva
of; the control. valve I44. ‘in opposite direction
tionxof the. upper roll 20 at the opposite ends
awayfrom. its “off”. position will. provide reverse 25 thereof. in. accordance with the contourchange
direction operation of. the entire system; and that
prescriptiontfor thecurved sheet article to be
drainages .of the cylinders 9.0.—9.II will then take
produced. Thus, it will be. understood that it
placeftlirough the‘ upper. ports of the cylinders
is thehydraulic pressure forces within the cylin
ders 89'—9ll that force the upper roll down
anddnto'conduits. I54—.-I55 and thence through
wardly relative to the. work sheet to de?ect the
thévalve cylinder unit It'll-.140 atthe righthand
latter to .varyingzdegrees such as are permitted.
sideof thedi?erential lever I35; and thatthe
by the pro?le changes of the cams I?Il—IBIl cor.
automaticileveling 'feature'otzthe mechanism will
responding. to the opposite ends of the work
under such -"circumstances ‘be adapted to function
sheet- Therefore, the. cams need only be pre
ina similarfmannen.
formed'to produce suitable separate elevational
" 'Ilo "prlovide for-relative adjustments of. the beam
adjustments of theopposite ends of the upper
suspensionidevices at opposite ends of'the upper
rclllZIl; the cam vsumaortinglink‘s.9d.—-96 are pro
vide’d:to he oppositely threaded at their. ends as
indi'cated'at: I63 ‘(Figs 2——3). Each link 96-.-96
haskeyedf thereon ‘a worm wheel I64 which 40
meshes with a worm gear I65 carried by ‘a shaft‘
roll.20 ‘so as to cause the work sheet to be bent
as prescribed throughout the. chordwise and
spanwise extents thereof.
(Fig.i6~)‘, and each of the cams I 00—IIlll is pro
'AsZthe' rear edge of each work sheet passes
throughtheroll ‘elements (of the mill the sheet
is freed to. be.v removed by an attendant, and the
micrometer switchi'I'I is thereupon actuated by
thev limit device I82 v‘to open the circuit of the
drive. motor 'l?sso as’to prevent the. cam carriers
l??m-‘llunafirpm ‘being driven off the machine.
The.;operator.wi1=l then turn the motor control
switch I52 to “reverse” and the.‘ hydraulic roll
elevation. control ‘valve 144 to “open” position.
The motor will‘then drive the cam carriers to re
turn. towardstarting position and the upper roll
he lifted to make room for feeding the
next; work' sheet. into starting position between
the rolls. During this process the automatic lev
eling mechanism. described hereina-bove oper
atesi-torinsure that the roll 28 rises equally at ‘both
ends. Uponrreturn of the cams 100-400 to their
vided ‘with positiona-lly. adjustable stop devices»
Iwwtaz-if‘ig. '6) for, cooperation with the actué
the. micrometer. switchnl ‘I5 so as to open the re
I?iBsWhic'h is’ keyed to‘ aicorresponding hand wheel
IEBhnd-J'ournaled in a bearing l?awhich is car
riedby the ‘link-96. Thus, manual rotations of
the hand wheels~ I§6:8=i-.-f69-iwill provide . corre
spondingselective adjustments of the lengths of
the..'linl;s.95-.—96 so. that the upper roll’ can be
?nally: adjusted ‘relative to the work in conjuncj;
tio'nfwith each new work setup while the'wheels
934-198 are against ‘the cams I00+IOIL Also, the'. ‘
handwheels I68 may be employed if'desired for
manual. control of ‘the upper roll setting during
work: sheet formingprocessea'in ~lieu of cams or
the'like as explainedhereinabove. vMicrometer
switch devices adapted to open the circuitsto the. '
motor 17:5 are mounted as indicated at’I'IBe-It'I’I
starting, positions thelimit device I85 .actuates
ating finger portions .ofthe micrometer switches.
verse. operation. circuit of. the motor ‘I5, where
A work sheet trailingzedge support bracket as
at I90 (Fig.4) ispreferably arranged to extend
from the reed side of the machine frame ill to.
upon. the. machine is ‘ fully. prepared. to. receive
anothersvvork sheet and to repeat thereon .the
hereinahove recited f orming operation,
support inrapproximately level position thepwo-rk
‘Becauseitis impracticable to buildzthe rela
sheietsto .‘he-pl‘ocess‘edpas indicated at. 1-95.. An' 65 tivelyllong rollsupportingheam elements of the
adjustable stop device ‘.195 vis .zpreferably‘ mounted
machine. to absolutely , rigid against bending,
it is preferred in connection with ?at-rolling .op
upon thebrzicket. zl?dand ‘arranged toxbe detach
abiy ‘clampedthereto. as "by a wing nut. I91;
erations to provide means for oppositely deflect
whereby; preparatory :to similarly processing ;a.seingto..;a_> of. the opposed roll
ries ,;of identical work sheets the stQpzI'BGmay he 70 supporting ‘beam. elements ‘when it is unloaded.
initially set at properposition .a-ndésuccessive
Thus,» when the/working load forces are applied
theyare ‘employed to. realignthe roll supporting
work sheets may ‘thenrbe rested upon-the bracket
so as. ‘:to register their trailing .edges. .again'stthe
elements -.and their. rolls into-perfect straight
line :fOI'mSSQ that the. machine. will produce ?ne,
1Tb commence thenwork sheet forming opera-v
ished :rollied sheets which are perfectlystraight.
' in spanwise directions. For this purpose an ad
justable truss arrangement may be provided to
‘ actuated by ?uid means at opposite ends'thereof,
comprise diagonal struts IQB-IQB extending
press to remain substantially equidistant from
wherein it is normally desired to provide said
‘ from opposite ends of the frame beams l0 into
connection“ with vertical struts Ills-r99 extend
ing from intermediate positions on said beams.
‘ A manually adjustable and calibrated hand wheel
said bed at opposite ends thereof; an-automatic
‘levelling control comprising a single ?uid pump
and conduit means extending parallel into con
nection with said ?uid means, return conduits
20!] (Figs. 1 and 8) is keyed to a screw, bar 202
leading from said means into a cylinderv at longi
-’ which extends between the free ends of the struts
spaced ports therein, a piston within
NIB-J99 to regulate the distance therebe'tween‘ 10 said cylinder
normally positioned therein between
' upon'manual adjustment of the hand wheel Zt‘ll;
' whereby'it will be
the position of said ports so as to avoid closing
understood that the machine
thereof, said piston being perforated to provide
‘ frame may be caused to arch slightly under un
I metered passage of ?uid therethrough and con
loaded conditions so as to be prepared to ?atten
nected to a control rod extending exteriorly of
' out under stock-‘rolling loads so as to produce
said cylinder, a differential leverpivoted to said
control rod intermediately of its ends and pivot
‘perfectly straight leading edge type products as
illustrated for example by Fig. 10.
_ e
ally connected at its opposite ends to push-pull
A particular feature of ‘the forming rollof the
members linked to opposite ends of said press so
as to be differentially displaced upon movements
' invention is that all of the stock-contacting roll
elements thereof are power driven in mutual
of said press relative to said bed to unequally
synchronism. Hence, it its unnecessary to ar
range for pinching the work sheets ‘between the
‘rolls in order to obtain suf?cient driving-action
of the rolls against the work sheets. Because of
this “triple-grip”
_ spaced relation‘at opposite ends thereof, whereby
said control lever willbe automatically shifted to
move said piston so as tothrottle one of said
_ ports whereby to retard ?uid drainage from one
of said ?uid means and ktothereby' provide a press
holding and dI‘iVll'lg action of >
the'rolls against the stock sheet when inserted
therebetween, the rolls are enabled to obtain suf
‘?cient frictional holds upon the stock piece to
' drive it in accurate-"synchronism with corre
“sponding displacementsof the cams without ex
cessive pinching of the‘ stock between any two of
level restoring force;
sheet to be permitted to slip relative'to the'rolls
‘in such manner asto provide the requisite dif
ferentials of displacement motions'of the‘ work :
sheet relative to the rolls at opposite en-dsof'the
vwork sheet in connection, for example, with the
illustrated by Fig. 10.
It will be understood that in'order to form an
‘article as illustrated in Fig. 10, either the lower
roll elements lit-“I8 will be ?rst adjusted tov be
closer spaced at one end of, the machine than
at the other, or the cam track devices at ‘oppo
site ends of the machine will be shaped so 'asto
force the upper roll 20 to move downwardly be
tween the rolls |6—l 8 to a greater depth‘atone
end of the machine than at the other intermed
jiately of the stock forming operation. In any
case, since the opposite ends of the roll elements
are rotating at equal speeds some slippage of the
work sheet relative to the roll elements must be
permitted to accommodate the “tapered”- forming
operation referred to hereinabove. If, for ex—
ample as in the prior art, only one or two of the
roll elements, were arranged to be power driven
it would be necessary to provide the powered rolls
to more'?rmly grip or “pinchi’, the, work sheets
therebetween in order to get sufficient driving
connections between the roll elements and the
work sheet; and sucha “geared” type connection
between the roll elements andthe" work sheet
would interfere with the di?erential slippagev re
quired to formwtapered articles as explained here
Although only one formof the invention has
beenv shown and described in detail it will be ap
parent to those skilled in the art that the inven
tion isnot so limited but various changes-may
be made therein without departing from the
spirit of the invention or the scope of the ap
pended claims,
it is normally desired to provide said press to
remain substantially equidistant from said bed" at
opposite ends thereof, power means for actuating
said press at opposite ends thereof to move rela
tive to said bed, and an automatic leveling device
associated with said power means to control, the
latter so that any motion of one end of; the beam
to advance ahead of the other end‘thereof will
automatically reduce the forces creating’such
by ?uid means at opposite ends thereof, wherein
_ the opposed roll
_ elements. _‘ This enables the work
‘forming of aspanwise tapered ‘curved product
‘such as the tapered airplane leading edge sheet
2. In a forming rollw machine'of' thecla'ss de
scribedand having a long bed and pressactuated
‘3. In a forming roll machine of theclass de
scribed and having a long bed and press actuated
jby ?uid means at opposite ends thereof, wherein
1 it is normally desired to provide said press to re
main substantially equidistantfrom said bed at
opposite ends thereof, power means foractuating
said press at opposite ends thereof to move rela
tive to said bed, and an automatic leveling device
associated with said power means to control‘ the
latter so that any motion of one end of the beam
to advance ahead of the other end thereof will
automatically reduce the forces creating such
advance motion, said automatic leveling control
comprising a single ?uid pump and conduit means
extending parallel into connection with said
power means, return conduits leadingfromsaid
power means into a cylinder at longitudinally
spaced ports therein, a piston ‘withinsaid cylinder
normally positioned therein between the. position
of said ports so as to avoid closing thereof, said
piston being perforated to provide metered pas
sage of ?uid therethrough and connected to a
control rod extending exteriorly of said cylinder,
a differential lever pivoted to said control rod in
termediately of its ends and pivotally connected
at its opposite ends to push-pull members linked
,to opposite ends of said pressso as to be differen
tially displaced upon movements of said press
relative to said bed to unequally spaced relation
at opposite endsthereof, whereby said control
lever will be automatically shifted to» move said
piston so as to throttle one of said ports whereby
to retard ?uid drainage from one of .said power
‘means and to thereby provide a press-level re
I claim:
toring force.
1. In a machine having a long bed and press 75 ‘ 4. In a forming roll having stock contacting
motion of opposite ends of said roll supporting
element except as overcome by operations'of said
j-roll elements at opposite sides of the position of
the stock to ,be rolled, means for regulating the
cam means.
relative positions ofsaid-roll-elements,said means
10. In a forming roll machine of the character
_.comprising pressure means, tending to force one
described, a bed, apair of stock forming rolls
mounted upon said ‘bed, a frame disposed above
said bed, a'thirdv roll carried by said frame ‘so
as to be adapted to rollingly engage and press
upon the upper surface of a stock piece rested
. 5. In a- forming rollhaving/stockcontactingroll 10 upon said lower rolls, an adjustable support‘ de
vice-mounted at eachendof said bed and extend—
elements’ at opposite sides. of the position of the
ing therefrom to provide suspension‘mountings
Istoelsto be rolled, means for regulating the rela—
for the opposite ends of said frame relative to
tive positions-of said- roll elements, said means
said bed, and support-adjustment- control means
comprising cam devices positioned at opposite
comprising guide devices- carried by said sus
ends of one of said roll elements, guide means
pension means and cam devices mounted upon
,linked- to 0pp0site~;ends».of-,one vofpsaid roll ele
said bed to be displaceable thereon in synchro
ments and associated with said cams respectively
nism with stock-driving rotations of said rolls
for shifting the positions of the corresponding .end
and thereby operable to actuate said guide ‘de
portions of said roll element in response to move- '
vices to independently adjust the frame suspen
vments of said guide meansdrelative to said cam
sion means at opposite ends thereof.
devices, and means automatically operable in re
11. In a forming roll machine of the character
sponse to driving rotation- of said roll elements
described, abed; repair of stock forming rolls
toiproviderelative camm-ing movements between
of ,said :roll elements towardthe othencam means
“positively limiting the e?ects [of said pressure
means, andmeans synchronizing said camming
eifectswith the movements of stock through said
1 roll elements.
said guideandea-m-devices.
v6. Ina forming roll having-.stockcontacting roll
elements at opposite sides ofthe position of the
stock to be rolled, means wfor regulating the rela
tivepositions ofsaid- I‘Olla elements, said means
comprising pressure: means tending to force op
posite; ends of one of said roll elements to move
independently toward the other‘ of said roll ele
ments,and'camdevicescontrolling the extent of
,movements'nof?said'groll element ends, said cam
deviceslbeing controlled by the rotation of the
roll elements.
mounted‘ upon said bed, a frame disposed above
said bed, a third, roll carried'by said ‘frame ‘so
as to .be adaptedto vrol-lingly engage and press
upon-the upper surface of a stool; piece rested
upon ‘said lower rolls,- all. three of said rolls be
ingpower-driven atapproximately the same sur
face speed, an adjustable-support‘ device mount
ed at each endofsaidbed and extending there
from to. provide suspension mountings forthe op
posite ends of said frame relative to said bed, and
support-“adjustment control means comprising»
guide devices carried by said suspension‘ means
and cam devices mounted. uponsaid- bed to-be
'Z.-In a- forming roll having stock contacting
displaceable thereon-in. synchronism with stock—
:roll elements at opposite sides of the position of
driving rotations of said-rollsand therebyop
vthe stock tolbe rolled, means for regulating the
erable to actuate said guide devices to independ
relative positions of said roll elements, said means
comprising pressuremeans tendingto force‘op 40 ently adjust the frame suspension means at op
I posite ends thereof;
posite ends of 'oneof said" roll elements to move
,12. Ina forming roll: machine. of. the character
independently toward the other of said ‘roll ele
deseribedra. bed, apair of- ‘stock forming rolls
ments, and cam devices controlling the extent of
mounted upon .saidbed, a framev disposed .above
movements of said roll element ends,_said cam
devices being controlled by the rotation of the - said bed‘, .a,third.roll carried by said frame so as
to be adapted to rollingly engage and pressupon
roll elements andin synchronism ‘with passagehof
.the stock' through themachine.
the upper. surfaceof a. stockpiece- rested upon
8.: Ina forming roll having stock contacting
saidlower rolls, a positioning device at eachlend
roll elements at opposite sides of the position of
‘the stockto-be rolled, means for regulating the ;
vrelativepositions of. said roll elements, said means
comprising» pressure means tending to force 0p
mountings'forthe opposite endsof said framerel
,ative to, said bed,.and position adjustment means
posite ends ofoneof said roll’ elements to‘move
independently toward the other of said roll ele
ments,fand cam devices controlling the extent of
movements of said roll element ends, said cam de
vices-being controlled by. the rotation of the roll
elements,said press‘ means including means nor
mally providingapproximate synchronism of mo
tion of .lopposite ends of said roll supporting element. '
.__9__ In a, forming roll having stock contacting
roll-elements at oppositesides of the position of
the stock to be rolled, meansfor regulating the
relativepositions of?saidroll elements, said means
‘comprising pressure means tending Ltofforce op
pqsite‘endsof ,one of’ said roll elements to move
7 independently toward the other of said roll ele-_
ments, and cam, devices controlling the extent of
movements of said. roll elementends, said cam
devices,,being_ controlled by the rotation of the
roll elements, said press means including means
normally providing approximatesynchronism of
offsaid; bed. and , extending therefrom to provide
comprising cam means carried by saidbed .to be
displaceable thereon in synchronism with stock—
‘driving, rotations of said rolls. .and thereby‘ oper
able to ‘independently adjust the frame position
ing means at opposite ends‘thereof.
13.. In a forming roll__having stock contacting
roll elements at. oppositersides of the stock mo
tionpassageway,therethrough, means» for regu
lating the relativepositions of said roll elements,
said means comprising separate cam devices cor
responding to'opposite ends of one of said. roll
elements, separate guide means linkedto said op
posite ends of said one of said roll elements and
guided by‘ said cams. for adjusting the positions
'of‘the end portions of said roll element in. re
sponse .to relative movements between. said guide
devicesand .saidcam devices, and meansauto
matically. operable in responseto driving rotation
of said1 roll elements tovprovide. relative move
ments between said guideand cam devices.
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