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NOV. 5,
'
2,020,042
N. c_ RUB|N
ROLL FORMING MACHINE
Filed April 11, 1933
4 Sheets-Sheet"l ‘
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INVENTOR
NORBEET c .
RUBIN
qsazwy
Nov. _5, 1935.
N. c. RUBIN
2,020,042
ROLL FORMING MACHINE
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Filed April 11, 19'35
4 Sheets-Sheet
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NORBERT C. RU Bl N
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Nov. 5, 1935.
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N_ c, RUB».
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2,020,042
ROLL FORMING MACHINE '
Filed April 11, 1933
4 Sheets-Sheet
5
f0 6
INVENTOR
‘
NOEBEET c. £05m
Nov. 5, 1935.
I
N’ c, RUBlN
2,020,042
ROLL FORMING MACHINE
Filed April 11, 1933
4 Sheets-Sheet
4
INVENTOR
NORBERT C. RUBIN
QIEQD [email protected]%%%u
Patented- Nov. 5, 1935
_ 2,020,042
rs'r OFFlE
UNITED srATs
2,020,042 ’
ROLL FORMING MACHINE
Norbert C. Rubin, Cleveland, Ohio, assignor to
The McKinney Tool and Manufacturing Com
pany, Cleveland, Ohio, a corporation of Ohio
Application April 11, 1933, Serial No. 665,474
5 Claims. (Cl. 153--28)
My invention relates in general to roll forming
machines and more in particular to machines for
roll forming sheet metal.
The present method of roll forming sheet metal
consists of introducing one end of a relatively
' long strip of sheet metal into the ?rst pair of
rolls of the rolling machine. These rolls, being
driven, grip the stock and pass it on to a second
pair of driven rolls where the initial forming
10. ta es place. As the stock is driven through the
machine, each successive pair of driven rolls
gradually bends the sheet metal; thus as the stock
emerges from the roll forming machine, it is
completely formed into the desired shape. Dur
ing this forming process the sheet metal may be
stretched more in one pair of rolls than in the
succeeding pair so that an accumulation of stock
is the result. Not only is this accumulation of
the stock undesirable but usually results in the
20 ?nished form being distorted to the extent that
desirability of straightness and form of the fin
ished piece is impossible.
It is obvious that if the operator of the ma
chine were able to disengage from their drive all
the pairs of rolls causing the accumulation, and
allow the remaining‘ rolls to draw the stock
through the roll forming machine, such an ac
cumulation would be impossible, thus eliminating
a possibility of distortion in the ?nished section.
provided a clutch whereby the driving source may
be disengaged from one or more pairs of rolls but
also a brake which is controlled by the clutch con
trols in such manner that, when the clutch is
disengaged, the brake is applied with the desired 5
tension to the rolls. This provision forms another
object of my invention.
It is possible that the operator of the roll form
ing machine may have one set of forming rolls
which he uses almost constantly so that after 10
arriving at a satisfactory brake adjustment for
that set of rolls, it is highly undesirable to change
that adjustment. Consequently, without chang
ing the brake adjustment the operator may ap
ply a different set of rolls to the machine. 15
Should all the rolls be driven then all the clutches
should be engaged and likewise all the brakes
released, but if several pairs of rolls should be
converted to idlers then the clutch and brake
control should be moved to a provided neutral 20
position wherein the clutch teeth have been dis
engaged but the brake not yet applied.
This
?exibility of roll adaptation to a roll forming
machine ‘constitutes another object of this dis
closure.
.
25
Also during the life of the roll forming machine
the necessity of embossing the strip of sheet
metal presents itself. Invariably this operation
stretches the stock to some dimension which is
Such a device wherein the operator can easily
usually impossible to predetermine. This amount 30
engage or disengage one or more pairs of rolls
of stretch is so great that it is necessary to use
special size rolls or a desirable speed for both the
from the main driving source comprises the ?rst
object of my invention.
In a roll forming machine where all the rolls
are driven it is also readily seen that as a very
embossing rolls and all the preceding rolls to
arrive at the proper peripheral speed and thus
eliminate the large accumulation which other- 35 .
light gauge of stock is being formed, excessive wise would form. Therefore the ability to use
stretch may appear between any two pairs of ' any size of embossing rolls through the use of the
rolls with the result that tearing of that strip ofv clutch to disengage these and all preceding
sheet metal is inevitable. The second object rolls from their source of power, ‘constitutes an
of my invention also includes the provision of other object of this invention.
40
converting any one or more pairs of driven rolls
to idler rolls by disengaging a clutch in the drive
housing and thus enabling the roll forming ma
chine to form any gauge of stock.
There are also instances during the operation
of a roll forming machine when it is desirable not
only to eliminate an accumulation of stock be
tween two sets of rolls but also to stretch the sheet
metal slightly between two sets of rolls. This is
found desirable when the stock tends to wrinkle
resulting from the irregular shape being rolled
therein. It is obvious that in a roll forming ma
chine where all the rolls are driven, the provision
of slightly stretching the sheet metal can not be
on U! accomplished. In my invention I have not only
i All who are familiar with this art recognize
the fact that forming rolls which are used on a
draw bench do ‘not necessarily have to be of the
same pitch diameter. It would therefore be im
possible to use a set of draw bench rolls on a-roll
forming machine because of the varying speeds
resulting from the ‘various pitch diameters of the
rolls. As another object of my invention it will
be seen that by disengaging all the roll spindles, 50
except the last two or three, from their respec
tive power source, a set of draw bench rolls can
be applied to the roll forming machine and by
using the last two or three rolls to draw'the stock '
through the rest of the rolls the variable speed 55
2
2,020,042
element is eliminated even though the rolls are
of various pitch diameters.
Another advantage gained by being able to dis
engage the rolls from their power source is that,
when the required number of rolls to form the
desired section is less than the number of roll
spindles on the machine, those spindles which
are unemployed may be disengaged from the
main drive, resulting in a cheaper operating cost
10 for the entire machine. This forms another ob
ject of this disclosure.
Further objects and advantages of my inven
tion will be apparent from the following detailed
description and illustrations in which:
15
Figure 1 is an elevational view of a cold roll
forming machine illustrating only the essential
features of the machine.
Figure 2 is a side elevational view of a portion
of the cold roll forming machine shown in Fig. 1.
Figure 3 is a side elevational view of a portion
20
of the cold roll forming machine as shown in
Fig. l, and illustrating, in addition, an accumu
lation of material between the pairs of rolls.
Figure ‘l is a view, partially in section taken
25 along line 4-4 of Fig. 1.
Figure 5 is a view partlally in section taken
along line 5—5 of Fig. 1.
Figure 7 is a view partially in section taken
along line 1—-l' of Fig. 6.
Figure 8 is a view partially in section taken
along line 8-—8 of Fig. '7.
In the accompanying drawings which serve
35 to illustrate my invention, the reference charac
ter i, represents the bed of a cold roll forming
machine. (See Figs. 1, 4, and 6.) Mounted on
the bed and adjacent to each other are a plural
ity of rear housings 2 having mounted therein for‘
40 rotation a bottom spindle 3, having its opposite
end carried for rotation in an outboard housing
4. Locate-d immediately above the bottom spin
dle 3 is a top roll spindle 5 which is also sup
ported at one end by the rear housing 2 and
at the opposite end by outboard housing 4. Sup
porting the bottom spindle in the rear housing
is an anti-friction bearing 6 retained therein by
a bearing retainer ‘I on the outside and another
retainer 8 on the inside, both being secured to
50 the housing by screws, not shown. Adjacent to
the outside of the inner race of the bearing 6 is
a shoulder on the bottom spindle 3 against which
the bearing 6 is retained by a spacer 9 placed
against the opposite face of the bearing race.
55 Bearing against the opposite end of the spacer
3 and keyed to the bottom spindle 3 is a spur
gear l6 having placed against its opposite face
one end of another spacer H.
Located on the
bottom spindle 3 and between the opposite end
60 of spacer H and one end of another spacer I2,
is the inner race of a single row ball bearing I2.
Serving to lock another single row ball bearing
i4 against the opposite end of the spacer I2,
is a standard lock nut l5 having threaded en
65 gagement with the bottom spindle 3. It is then
obvious that the lock nut 15 serves to retain the
70
5
on its outward periphery is a ?ange being sur
rounded by a trunnion collar 2|, the trunnions
thereon being engaged by the forked ends of a
lever 22.
Mounted against a shoulder on the bottom 10
spindle 3 and adjacent the clutch member !9, is ,
a brake drum 23 keyed to the spindle 3 and re
tained thereon by a spacer 24 mounted against
its opposite face. Located between the oppo
site end of the spacer 24 and a standard lock nut 15
25 having threaded engagement with the bot
tom spindle 3, is a single row ball bearing 25.
It is then obvious that the lock nut 25 serves
to retain the bearing 26, the spacer 24 and the
brake drum 23 against the provided shoulder on 20
the bottom spindle 3. Carrying the outer race
of the ball bearing 26 is a cover plate 21 which
is suitably fastened to the rear housing 2 of the
roll forming machine by means of screws (not
shown).
35
Mounted in the rear housing 2 for rotation on .
worm gear ring I8 is a worm 29 having mounted
at its extremities two coupling halves 30, so that
along line 6—6 of Fig. 1.
45
on one end a series of clutch teeth 20 in engaging
relation with ‘the clutch teeth H. Formed. mid
way the ends of the jaw clutch member I9 and
-anti-friction and in driving relation with the
Figure 6 is a View partially in section taken
30
bottom spindle 3 and adjacent to the worm gear
hub i6 is a sliding jaw clutch l9 having formed
the worm shaft in the adjacent housing may re- m
ceive rotation from the worm shaft which is
driven from some separate source of power. It
will now be readily seen that, when the sliding
clutch member I9 is in the disengaged position,
being the position shown in Figure '7, and when u
the worm shaft 29 is rotated, the worm gear 18
and its associated hub and bearings also rotate,
but that no rotation will be imparted to the bot
tom spindle 3 or any of its component parts.
Opposite its bifurcated end, the lever 22 is 40
mounted with keyed relation to a shaft 3|, said
shaft having its upper end carried for rocking
movement in a boss 32 cast integrally with the
rear housing 2. Extending beyond the opposite
end of the lever 22, the shaft 3| passes through 45
another boss 33 in the rear housing and termi
nates in a lever 34 which is located on the under
side of the roll forming machine bed I. Passing
through a hole in the extremity of the lever 34,
is one end of a link 35, which 'is retained therein 50
by a cotter pin 36 in the end of the link beyond
the lever. The opposite end of the link 35,
which is formed at right angles to its body, is
contained in the upper end of a lever 37, and
retained therein by means of a cotter pin 38 in ‘5
the end of the link passed through the lever.
Extending through and with keyed relation to
the hub of lever 3'! is a shaft 39 having one end
mounted in the bed i of the roll forming machine
having its opposite end passing through the other 60 I
wall of the bed and terminating in the hub
of a lever 40 to which it is keyed (see Fig. ll)‘.
It is now obvious that as the lever 43 is given a
rocking movement, a similar rocking movement
is imparted through the link 35, the lever 34, 65
and the shaft 3! to the forked lever 22. Readily
bearing l4, spacer | 2, bearing l3, spacer H, gear
seen is the fact that as the forked lever 22 is
29, spacer 9 and the bearing race 6, against the
shoulder on the bottom spindle 3.
given a rocking movement such a movement will >
Carried on the outer races of bearing l3 and
is is a worm wheel hub l6 having formed on its
face,’ opposite from the gear, [0, a series of clutch
teeth i‘! and supporting on its outward periphery
adjacent the clutch teeth a worm gear ring i 8
75 (see Figures 6 and 7). Slidably keyed to the
result in a reciprocal travel of the clutch mem
ber H! on the bottom spindle 3, thus tending to
engage or disengage the clutch teeth I‘! and 20
as the machine operator desires.
Surrounding the bottom half of the brake
drum 23, (see Figs. 7 and 8) is a brake shoe 4|
having contained on its inner surface a strip of 75
3
2,020,042
brake lining 42 so mounted as to have a braking
engagement with the brake drum. Likewise, in
in the rear housing 2 is a bearing box 10 having
contained therein another roller bearing '|| re
a similar manner, a brake shoe 43 encases the
tained by a bearing cap 12 suitably fastened to
top half of the brake drum and carries a strip
of brake lining 44. Extending outwardly from
the adjacent ends of the top and bottom brake
shoes 4| and 43, are a pair of lugs 45 carrying
a pin 46, retained therein by a cotter pin 41
passed through the end of the pin 46 beyond the
10 face of the lug. Mounted on the pin 46 and be?
tween the lugs 45 on both brake shoes are two
brackets 48 extending downwardly and outward
the box with screws, not shown. Located on the
opposite side of the roller bearing 6 from the side
which bears against a shoulder on the top spin
dle 5 is a spacer 13 having mounted against its
opposite face a spur gear 14. Mounted between
one end of a spacer 15, the opposite end of which
bears against the face of the spur gear 14, and a 10
lock nut 16 having threaded engagement with.
the top spindle 5, is a single row ball bearing 11.
ly with a parallel relation to each other. Pass
Obviously the lock nut ‘l6 serves to de?nitely lo
ing through the outward extremities of both
cate the ball bearing 11, the spacer 15, the spur
gear 74, the spacer 13 and the roller bearing ‘H
on the top spindle 5 against the provided shoul~~
der. Housing the ball bearing 11 is a bearing
box 18 slidably mounted, in provided ways, in
the rear housing 2.
brackets 48 is a screw 49 having a right and a
left hand threaded engagement with the brackets
and having its unthreaded end terminating in a
pilot lug 50 cast'integrally with the rear nous
ing 2. Above the lug 48, Figure 8, the screw
20 49 extends upward through the top plate 5| on
the rear housing 2 and terminates in a squared
end above the top plate so that a wrench can be
applied to it. In evidence then is the fact that
as the screw 49 is rotated, the brackets 49 are
25 brought together or drawn apart as the operator
so desires.
At the opposite end of both brake shoes, 4| and
45, (see Figures 7 and 8) there are also formed
a pair of lugs 52 carrying both ends of pins 53
30 which are retained therein by cotter pins 54 pass
ing through the ends of the pins beyond the lugs.
Mounted on the pin 53 and outside the lugs 52 on
the bottom brake shoe 4| are two links 55 ex
tending upwardly and supporting both ends of
35 a pin 55 which is retained by a cotter pin 51
passing through both of its ends. Mounted on
pin 53 and inside the lugs 52 on the top brake
shoe 43 are two links 58 extending upwardly
and containing a hole through which is passed
40 the pin 56. Also mounted on the pin 56 and be
tween the ends of links 55 and 58 is one end of
another pair of links 59 extending outwardly and
having a hole therein through which is passed a
trunnion 69 ?xed to a block 6| located between
45 the links 59. Also mounted on the trunnions 60
and retained thereon, together with the links 59,
Supporting these bearing boxes are an ar 20
rangement of screws, (see Figures 6 and 5).>
Extending upwardly from the bearing box 10 is a
central screw 19 piloted therein and having
threaded engagement with the top plate 5| as it
passes therethrough. Continuing upwardly the 25
screw 19 has formed thereon a ?ange upon which ~
rests a plate 80 having therein a circular hole
through which the screw extends and terminates
immediately above the plate 80 with a squared
end so that a wrench can be employed to rotate 30
the screw. Against the top face of the top plate
5| and having threaded engagement with the
screw 19 is a jam nut 8| provided to secure an
adjustment after being made. Extending out
wardly from the opposite sides of the screw ‘I9
and coinciding with the bearing box 10, (see
Figure 5) the plate 80 has formed in either ter
minal a hole through which are passed two screws
82 the heads of which rest on the upper surface
of the plate. Extending downwardly the screws 40
82 pass through provided clearance holes in the
top plate 5| and terminate in threaded engage
ment with the bearing box 10. It is now ap
parent that when the screw 19 is screwed down
wardly the bearing box 10 and component parts 45
are likewise forced in a downward direction and
when the screw is raised the bearing box is also
raised by virtue of the screws 82 and the plate
by a pair of cotter pins 62 are the ends of two
links 53, the opposite ends of which are carried
on a pin 64 supported in a lug 95 cast integrally
50 with the rear housing 2. Carried in a semi
spherical hole in the top of the trunnion block 5|
rangement the rear bearing box 18 is raised and 50
lowered. Mounted with keyed relation and
and retained by a cap 66 is one end of a ball end
link 61 its opposite end retained in the end of a
lever 58 by another cap 89 fastened to the lever by
55 screws, not shown. The opposite end of the lever
St" has a keyed relation to the shaft 3| together
bearing box 1|] and the top plate 5| is a sprocket
83 having a chain 84 running between it and a
similar sprocket on the screw which supports the
rear bearing box 18. In evidence ‘then is the fact
with the previously mentioned forked lever 22.
It is now apparent that by partially rotating the
shaft 32 not only is the clutch member i9 recip
rocated and the jaw teeth engaged or disengaged
as desired but also is the lever 68 given a rock
ing motion resulting in an opening or closing of
the toggle varrangement comprising the links 59
and 63.
Likewise in obviation is the fact that
65 the lock formed by links 55 and 58 will be opened
or closed resulting in the brake being applied or
released regardless of the amount of tension
previously created by the operator adjusting the
screw 49. It will be noted by observance of Fig
70 ures ‘I and 8 that the levers 68 and 22 are so re-.
lated that when the clutch teeth I‘! and 20 are
engaged, the brake is released and vice versa.
Continuing with the rollspindle drive itself;
immediately above the roller bearing 6 (see Fig
75 ‘ure 6) and slidably mounted, in provided ways,
80.
In a similar manner and by a similar ar
against a shoulder on the screw 19 between the
that as one screw is rotated, the other shall also
be rotated and by virtue of both screws being
similarly threaded into the top plate 5| the bear
ing boxes 10 and 18 move in the same direction
simultaneously resulting in both top and bottom
spindles maintaining a parallel relation with each
other.
'
Mounted for rotation on a ?xed center 9| in
the rear housing 2 and in the proper engaging re
lation with the spur gear H), (see Figure 5) is
another spur gear 99. Extending upwardly from
the ?xed center 9| is a pair of links 92 carrying
in its upper end a pin 93 supporting for rotation
another spur gear 94 having a proper engaging
relation with the spur gear 99. Uniting the spur
gear 94 in the proper relation with the spur gear
14 is a link 55 having one of its ends carried by
the pin 93 and its opposite end supported by a 75
4
2,020,042
It is now
vwise I have’described and illustrated but one
evident that when the spur gear I0 is rotated in
the direction designated by the arrow 96, the spur
gears 98 and 94 will receive rotation and likewise
impart this rotation to spur gear 14 in the direc
tion designated by the arrow 91. Also in evi
dence is the fact that as the top spindle 5 is
type of brake, although any device by which I
provided hub on the gear box 10.
adjusted up or down the spur gears maintain
their proper engaging relation with each other
10 by virtue of the links 92 and 95 and the ?oating
pin 93. Obviously the sizes of the form rolls
which may be applied to the roll forming machine
can vary as the amount of adjustment between
the top and bottom spindles.
151i
Extending outwardly from the rear housing the
bottom spindle 3 passes through a sleeve 85 which
is mounted for rotation in the outboard housing
'
Throughout this disclosure I have described the 5
clutch and brake as having such a relationship
that when the clutch is disengaged the brake shall
be applied and vice versa but should it be desir
able to release the brake during a. disengagement
of the clutch it is obvious that the screw 49 shown 10
in Figure 8, can be adjusted so that there will .
be no braking effect even when the links 55 and
58 are moved to the locking position.
Also do Iwish it known that the particular
mechanism and the various parts hereof illus- 15
trated and described are merely a typical em
screwed thereon a flat sided nut 86. In a similar
manner the top spindle 5 extends through an
bodiment of my invention and that the speci?c
construction described herein is merely by way
of illustration and not by limitation or narrow
ing of my claims.
20
Obviously, various of the features described can
other sleeve 8'! which is mounted for rotation in
a bearing box 88 slidably mounted, in provided
to do certain of its work, such changes being con
4. Immediately beyond the sleve 85 the spindle
3 terminates in a threaded portion having
ways, in the outboard housing 4. In a like man
25 ner the top spindle 5 terminates in a threaded
portion also having screwed thereon another nut
89. Contacting the top of the bearing box 88 is
a screw 98 extending upwardly through the top
plate 99, having threaded engagement therein
30 and terminating in a squared end to which a
wrench may be applied providing a means for
locking the bearing box 88 in position after the
adjustment has been made.
'
It is readily seen that when the spindle nuts
35 85 and 89 are removed from the spindles, the
be omitted leaving the mechanism still operative
templated by me and not involving any departure '
from my invention.
Having thus described my invention, what I
claim as new and desire to secure by Letters Pat
ent is:—
1. In a roll forming machine, in combination, a
plurality of lower roll spindles, a plurality of 30
upper roll spindles co-operating with the lower
roll spindles, forming rolls mounted on each of
said upper and lower roll spindles, the arrange
ment of an upper and corresponding lower roll
spindle being designated as a pair of roll spindles, 35.
outboard housing 4, with its associated sleeves 85
a housing for rotatably supporting the said pairs
and 81, can also be removed from the spindles to
facilitate the mounting of the form rolls on the
spindles. When the rolls are-in position ‘and
of roll spindles, a gear train interconnecting the
upper and lower roll spindles of each pair of roll
spindles, a common drive for the plurality of pairs
of roll spindles, an individual positive clutch ar- 40
ranged between the common drive and the gear
train of each of the pairs of roll spindles, an in
dividual brake for retarding the rotation of the
upper and lower roll spindles of each pair of roll
spindles, an individual control means common to 45
when the outboard housing and its component
parts are replaced, the rolls are locked between
the shoulder on the spindles and the, inner face
of the bearing sleeves 85 and 81 by virtue of the
fact that the spindle nuts 86 and 89 are tight
45 ened on the ends of the spindles. Obviously, as
the pulley I90,v which is mounted with keyed re
lationvto an extension of the worm shaft 29, is
rotated from any foreign source of drive, such
as a motor, line shaft, etc., rotation will be im
50' parted to the roll spindles through medium of the
gear transmission in the rear housing and stock
imposed between rolls on said spindles will be '
driven in the direction designated by arrow IOI,
Figures 1, 2, 3, and 5. As the stock is progressed
through the rollforming machine it gradually
assumes the shape being formed in it until it
emerges from the last pair of rolls being then
formed into the desired shape.
As previously described, the stock I02, (see Fig
60 ure 3) occasionally is excessively stretched be
tween two pairs of rolls on the roll forming ma
chine creating an accumulation between said
rolls. I ?nd that, by disengaging the pair of rolls
causing the accumulation from their source of
65 drive, the said accumulation disappears, by rea
son of the fact that the idler rolls no longer re
tard the passage of the accumulated material and
thus cause all the succeeding rolls to draw the
70
could obtain similar results can be used without
narrowing this disclosure.
stock through said idler rolls.
While in this disclosure I have shown and il
lustrated only an ordinary jaw clutch, I wish it
understood that any type of clutch capable of
being engaged or disengaged as desired can be
utilized and that their utilization would not in
76 volve any departure from my invention. Like
each pair of roll spindles for engaging the said
positive clutch when the control means is in one
position, and for disengaging the said positive
clutch when the control means is in a second po
sition and for applying the said brake when the
control means is in a third position.
2. In a roll forming machine wherein a sheet of
metal is interposed between and passed through
a plurality of pairs of uniformly driven rolls, and
wherein the said sheet of metal becomes distorted
and buckled between successive pairs of rolls when
certain of the pairs of uniformly driven rolls cause
the sheet of metal to be driven faster than other
of the pairs of rolls due to the creeping or stretch
ing of the sheet of metal caused by the shape of 60
the form rolled therein, in combination, a plu
rality of pairs of roll spindles, a housing for ro
tatably supporting the said roll spindles, a com
mon drive for the plurality of pairs of roll spindles,
an individual positive clutch arranged between 65
the common drive and each of the pairs of roll
spindles for positively driving the said pairs of
roll spindles and causing the said sheet of metal
to be driven therebetween, an individual brake
for retarding the rotation of each pair of roll 70
spindles, means for disengaging the positive clutch
associated with that pair of roll spindles which
cause the sheet of metal to be driven faster than
other of the pairs of roll spindles, thereby allow
ing the remaining pairs of driven roll spindles to 75
5
2,020,042
draw the sheet of metal through and between the
thus created idlerroll spindles without distortion
and corresponding upper roll spindle being desig
or buckling, and means to operate the said brakes
for constraining the rotation of the thus created
idler roll spindles to further reduce the distortion
rotatably supporting the said pairs of roll spin
dles, a gear train interconnecting the upper and
lower roll spindles of each pair of roll spindles
and buckling over that eliminated by the thus
created idler roll spindles.
substantially the same speeds, a common drive
3. In a- roll forming machine wherein a sheet
of metal is interposed between and passed through
10 a plurality of pairs of uniformly driven rolls, and
wherein the said sheet of metal becomes distorted
and buckled between successive pairs of rolls
when certain of the pairs of uniformly driven rolls
cause the sheet of metal to be driven faster than
15 other of the pairs of rolls due to the creeping or
stretching of the sheet of metal caused by the
shape of the form rolled therein, in combination,
a plurality of lower roll spindles, a plurality of
upper roll spindles co-operating with the lower
20 roll spindles, forming rolls mounted on each of
said upper and lower roll spindles, the arrange
ment of a lower and corresponding upper roll
spindle being designated as a pair of roll spindles,
a housing for rotatably supporting the said pairs
25 of roll spindles, a gear train interconnecting the
upper and lower roll spindles of each pair of roll
spindles for driving the upper and lower roll
spindles at substantially the same speeds, a com
mon drive for the plurality of pairs of roll spindles,
80 an individual positive clutch arranged between
the common drive and the gear train of each of
the pairs of roll spindles for positively driving the
said gear train and the pair of roll spindles, and
causing the said sheet of metal to be driven there
85 between, an individual brake for retarding the
rotation of each pair of roll spindles, means for
disengaging the positive clutch associated with
the gear train and that pair of roll spindles which
cause the sheet of metal to be driven faster than
other of the pairs of roll spindles, thereby discon
necting both the upper and lower roll spindles of
the disengaged pair of roll spindles from the com
mon drive, and thereby allowing the remaining
pairs of driven roll spindles to draw the sheet of
45 metal through and between the thus created upper
and lower idler roll spindles without distortion
or buckling, and means to operate the said brakes
for constraining the rotation of the thus created
upper and lower idler roll spindles to further re
50 duce the distortion and buckling over that elimi
nated by the thus created idler rolls.
4. In a roll forming machine wherein a sheet
of metal is interposed between and passed
through a plurality of pairs of uniformly driven
rolls, and wherein the said sheet of metal be
comes distorted and buckled between successive
nated as a pair of roll spindles, a housing for
for driving the upper and lower roll spindles at
for the plurality of pairs of roll spindles, an in
dividual positive clutch arranged between the
common drive and the gear train of each of the 10
pairs of roll spindles for positively driving the .
said gear train and the pair of roll spindles and
causing the said sheet of metal to be driven
therebetween, means for disengaging the posi
tive clutch associated with the gear train and
that pair of roll spindles which cause the sheet
of metal to be driven faster than other of the
pairs of roll spindles, thereby disconnecting both
the upper and the lower roll spindles of the dis
engaged pair of roll spindles from the common 20
drive, and thereby allowing the remaining pairs
of driven roll spindles to draw the sheet of metal
through and between the thus created upper and
lower idler roll spindles without distortion or
buckling.
5. In a roll forming machine wherein a sheet
of metal is interposed between and passed
through a plurality of pairs of uniformly driven
rolls, and wherein the said sheet of metal be~
comes distorted and buckled between successive
pairs of rolls when certain of the pairs of uni
formly driven rolls cause the sheet of metal to
be driven faster than other of the pairs of rolls
due to the creeping or stretching of the sheet
of metal caused by the shape of the form rolled
therein, in combination, a plurality of lower roll
spindles, a plurality of upper roll spindles co
operating with the lower roll spindles, forming
rolls mounted on each of said upper and lower
roll spindles, the arrangement of a lower and 40
corresponding upper roll spindle being desig
nated as a pair of roll spindles, a housing for ro
tatably supporting the said pairs of roll spindles,
driving means interconnecting the upper and
lower roll spindles of each pair of roll spindles
for driving the upper and lower roll spindles
at substantially the same speeds, power. means
for driving the plurality of pairs of roll spindles,
an individual clutch arranged between the power
means and the driving means of each of the pairs
of roll spindles for driving the said driving means
and the pair of roll spindles and causing the said
sheet of metal to be driven therebetween,- means
for disengaging the clutch associated with the
driving means and ‘that pair of roll spindles
which cause the sheet of metal to be driven faster
pairs of rolls when certain of the pairs of uni
formly driven rolls cause the sheet of metal to
be driven faster than other of the pairs of rolls
60 due to the creeping or stretching of the sheet
of metal caused by the shape of the form rolled
therein, in combination, a plurality of lower
roll spindles, a plurality of upper roll spindles
cooperating with the lower roll spindles, form
remaining pairs of driven roll spindles to draw
the sheet of metal through and between the thus
created upper and lower idler roll spindles With
65 ing rolls mounted on each of said upper and
out distortion or buckling. ,
lower roll spindles, the arrangement of a lower
than other of the pairs of roll spindles, thereby
disconnecting both the upper and the lower roll
spindles of the disengaged pair of roll spindles
from the power means, and thereby allowing the
NORBERT C. RUBIN.
65
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