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Патент USA US3064928

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Nov. 20, 1962
D. H. KEEN ET AL
3,064,918
LOOSE comm; INSTALLATION
Filed Aug. 16, 1960
2 Sheets-Sheet 1
INVENTORS
DOUGLAS 6. KEEN
GALE E‘. PAXTON
BY~
Arr’rs
/
Nov- 20, 1962
D. H. KEEN ETAL
3,064,918
LOOSE COILING INSTALLATION
Filed Aug. 16, 1960
2 Sheets-Sheet 2
INVENTORS
V
DOUGLAS 6. KEEN
GALE E- PAXTON
ATT'YS
Uited States Patent O?lice
B?di?lg
Patented Nov. 20, 15362
2
1
surface of the table 26 by causing the piston 12 to drop
$264,918
LOOSE COILH‘JG INSTALLATIGN
Douglas H. Keen and Gale E. Paxton, Burlington, 0n»
within its cylinder 14. As this occurs the splined shaft
of the mandrel slides through the drive gear 22 of the
gear box 20.
The table 26 is mounted for rotation on the circular
track 40 on the base 41 of the machine. it will be noted
that the table has spaced apart wheels 42 on the under
side thereof, that ride on the circular track 4i}, which is
concentric with the centre of rotation of the spindle Ill.
This invention relates to apparatus and to a method for
A motor 46 is adapted to turn the table 26 about the
converting tightly wound coils of still ?at strip material, 10
track 42 through the gear box 48, the pinion 50 of which
such as cold rolled steel, plastic and paper into loosely
engages with a circular track 52 on the underside of the
wound coils with a controlled gap spacing between each
table 26.
lap, and for reconverting the loose coils back into tight
A clamping bar 54 is provided on an outside vertically
coils.
The apparatus and method are of special use in the 15 extending wall of the table 26 for the purpose of clamp
ing the outer free end of a coil 56 of strip material with
steel industry where it is practice to anneal and “gas
respect to the table.
alloy” cold rolled steel in the loosely-coiled form. The
A small rubber~covered presser roll 60 rotatably
general process of reducing the carbon content in cold
mounted within a bracket or crank assembly 62, is
rolled steel as it is annealed by “gas alloying,” that is,
passing a controlled atmosphere of gas over the surface 20 adapted in use to press against the outer lap of a tightly
wound coil, on the mandrel. In the embodiment of the
of the steel, is well known, and multiple mandrel appa~
tario, Canada, assignors to Swindell-Dressler Corpora
tion, Pittsburgh, Pin, a corporation of Pennsylvania
Filed Aug. 16, 1960, Ser. No. 49,995
18 Claims. (Cl. 242-781)
ratus and methods have been developed for converting
coils of steel from a tightly wound condition to a loosely
wound condition that will permit the alloying gases to
pass freely over the surfaces of the steel. This invention
relates to an improved apparatus and method for con
verting the coils from the tightly wound condition to the
loosely wound condition and vice versa.
Generally speaking, apparatus according to this inven
tion for converting a coil of strip material from a tight
wind to a loose wind, comprises a substantially vertical
rotatable mounted mandrel adapted to grip the inside end
of a coil of strip material and a rotatably mounted sup
invention illustrated, it is driven within its rotatable
mounting by means of a motor 64 through a gear box
66.
Bracket 62, upon which the presser roll 6i} is mount
ed, is rigidly connected to the shaft 68. Shaft 68 in turn
is slidably mounted in a vertical direction and rotatable
within the lugs 70 on rigid post '72. Shaft 68 pivotally
joined with piston rod 74 of cylinder 76 at its lower end
so that it can turn about its own longitudinal axis with
espect thereto. Piston rod '74 has a square cross section
and is slidable longitudinally of itself within its support
lug 73. It can not, however, rotate within its support
port table, the support surface of which is substantially
lug.
engaging end 16 thereof to disappear beneath the support
ing device (not shown and not part of this invention).
Another arm of bracket 62 has a vertically extending
in a horizontal plane. A presser roll is provided that is 35
post 80 that slidably connects with the free end of a
adapted to press against the outside of the tight roll. The
piston 32'. The other end of piston 32 is pivotally mount
mandrel and presser roll are rotated to reel the strip from
ed to the rigid post 84.
a tight roll on the mandrel to a loose roll on the table.
In use as will be referred to later, hydraulic piston 32
At the same time, the table is rotated at a speed to take up
is operated to turn the crank assembly 62in the direction
and loosely coil the strip material inwardly of a point
of the arrow to cause the presser roll 6'!) to overlie the
where it is secured thereto. The invention will be clearly
support surface of the take up table 26. Piston 74 is
understood after reference to the following detailed speci
then dropped in its cylinder ‘76 to permit the crank as
?cation read in conjunction with the drawings.
sembly 62 to fall and lower the presser roll 60 to the
In the drawings,
1
height of a coil 56 of strip material overlying the table.
FIGURE 1 is a general view of apparatus according
The cylinder 82 is then extended to urge the presser roll
to this invention, partly broken away to illustrate principal
61) against the outside of the strip with considerable force
components, and
to keep the coil on the mandrel tightly wound.
FiGURE 2 is a plan View showing how the apparatus
The invention can be used for the converting of strip
converts a tightly wound coil to a loosely wound coil.
steel from tightly wound coils to loosely wound coils
in the drawings there is shown a mandrel, generally
and vice versa. These coils, in the case of cold rolled
indicated by the numeral ill rotatably mounted on the
steel when tightly coiled, have an inside diameter of be
free end of a piston 12 that extends from a cylinder 14.
tween 20" and 24" and an outside diameter of up to
The mandrel is formed with an expandable end 16 that is
72". The width of the strip material varies. A common
adapted, in use, to enter into the opening at the inside
width is 48 inches. However, the material is manu
diameter of a coil of strip steel and be expanded to se
factured in Widths up to 72 inches. It is common practice
curely mount the coil thereon with the inside free end
to take a tightly wound coil halving an inside diameter
secured thereto. Expanding coil engaging mandrels for
of 20 inches and an outside of 72 inches and convert it
strip steel are well-known in the art and detail is not
to a loosely wound coil havnig an inside diameter of
shown in this speci?cation.
about 36 inches and an outside diameter of 114 inches.
The mandrel it} is rotated in use within its mounting by
This gives gap thickness between adjacent laps of the coil
means of the motor 18 through the gear box 2%. The
of about one and one-half times the strip thickness.
shaft of the mandrel is splined where it engages the drive
The manner of using the apparatus described is as
gear 22 to permit the mandrel to slide vertically of its
follows. With the presser roll 60 in the inoperative posi
longitudinal axis as the piston 12 is moved inwardly
tion illustrated in FIGURE 1 of the drawings, and the
and outwardly of its double acting cylinder 14» under the
upper portion 16 of the mandrel lit retracted to a posi
control of hydraulic fluid fed thereto through the lines
tion below the polished bearing surface of the take up
22. The mandrel 10 has been illustrated in an extended
table 26, a tightly wound coil of strip steel is centred over
position in FIGURE 1 with the coil engaging end 16
the table with the centre opening thereof aligned with
thereof extending above the rotatably mounted support
the central opening in the take up table. The strip steel
table 26. The mandrel can be dropped to cause the coil
is handled by means of a crane having a magnetic hold
3,064,918
3
The mandrel it} is then raised by operation of cylinder
gap width can be controlled by unreeling speed or by
a combination of unreeling speed and table speed.
After the coil has been fully unreeled from the tight
14 to partially extend the end 16 thereof into the centre
opening of a coil of strip material 56. The coil is then
lowered onto the bearing surface of the take up table
26 and the mandrel id is extended into the centre of
the opening of the coil to within about one~eighth of an
between each lap, the inside end thereof is released from
the mandrel. The mandrel is dropped below the table
inch of its full raised position. The inside end of the strip
and the loose coil is lifted by means of a crane into a
roll 56 and is in the form of a loose coil with gaps 9h‘
heat treating furnace. After heat treating the loose coil
engaging end 16 of the mandrel is expanded to tightly
is again centred on the table with the mandrel in the
engage with the central opening of the tight coil of strip 10 lower position. The mandrel is then raised as before and
material. The mandrel is then raised to its full extent to
the inside end of the loose coil is inserted into the gripper
lift some of the weight of the tightly wound coil from the
of the mandrel and the mandrel is expanded. The
table.
mandrel presser roll and table are again rotated in
sychronization to uniformly rewind the loose coil onto
The outside end of the coil of steel is then unravelled
and clamped to the outer peripheral wall of the take up 15 the outside of the mandrel. The presser ‘roll being used
of coil material is then ?xed to the mandrel and the coil
as a drag on the outer lap of the tight coil to maintain
table 26 as at 54-.
The support crank 62 is then raised to clear the Wall
of the table by operation of cylinder 74 swung in the di
When
tensiontheas full
thecoil
coilhasis been
tightly
tightened
woundthe
onmandrel
the
is col
rection of the arrow of FIGURE 1 to overlie the table
lapsed and retracted into the base and the tightened coil
by operation of cylinder 82, dropped over the table 26 by 20 is removed by means of the magnetic crane.
opertaion of cylinder 74 and swung to press the presser
Modi?cations in the invention will, of course, be ap
roll 60 into pressing contact with the outer lap of the
parent to those skilled in the art. It may, for example,
tight coil. Alternatively, the presser roll could be caused
be desirable to permit the table to idle in the rewind ap~
plication rather than drive it in synchronization; or in the
to engage with the tightly coiled roll 56 of strip material
before the outer end thereof is clamped as at 54.
earlier operation of unreeling of the tightly wound coil,
it may be desirable to let the mandrel idle. Further, it
The take up table 26, the mandrel 10, and the presser‘
roll 61) are then simultaneously rotated by means of their
may well be possible to practice the invention without
respective drive means 46, 18 and 64 respectively to un
the presser roll provided that the stiffness of the material
reel the strip material from the tightly wound coil.
is su?icient to carry it across the takeup table to the
As the strip material is unreeled from the point Where 30 point where it is loosely coiled thereon in the unwinding
operation. In some instances, depending on the material
the presser roll 60 engages with the outside diameter of
the coil 56, the take up table 26 rotates to take up the
being handled, it may also be possible to rewind the
unwound strip and support it on its side edge in a loosely
material into a tight coil without the presser roll. These
wound coil having an outside diameter equal to the di~
things and others are variable Within the scope of the
ameter of the table, and with a space between adjacent
laps. The process continues until all of the tightly wound
invention.
coil is fed to the loosely wound coil.
What we claim as our invention is:
1. Apparatus for converting a coil of strip material
It will be apparent that the relative speeds of the
from a tight wind to a loose wind with a gap between
mandrel, presser roll, and support table ‘will constantly
vadjacent laps comprising a rotatably mounted mandrel
change because the point on the table where a particular 40 adapted to grip the inside end of a coil of strip ma
strip section is fed as it is unreeled and where it is in
terial, a table having a support surface adapted to sup
tended that it should be supported in spiral formation
port a loosely wound coil of strip material, means on
must travel at the same speed as the unreeled strip at the
said table for securing the free end of a coil of strip
time of its arrival at the point where it is to be supported
material, its longitudinal axis substantially at right angles
so that there is no relative movement between the two
to the support surface of said table and at the centre
and the table can take up the strip in spiral form.
thereof, a presser roll, means for rotatably mounting
If
the rate of unreeling is constant and a constant gap be
said presser roll for rotation with respect to strip ma
tween laps on the loose coil is desired the rate of turning
of the outer table will have to constantly increase as strip
material is unreeled to achieve this. The relative rates of
rotation of the mandrel and presser roll will also change
as the tight coil is unwound. FIGURE 2 is a plan view
of the table 26 showing a tightly wound coil 56 in the
process of ‘being reeled out onto the take up table 26 upon
which it is supported to its side edges in a loosely wound
coil having a gap 90 between adjacent laps. The steel
terial reeled from and onto said mandrel respectively,
means for urging said presser roll towards said mandrel
to keep a coil between said roll and said spindle tight,
separate means for rotating said mandrel and presser roll
is reeled out over the table as at 92 and continues to move
to reel a coil of strip material from said mandrel out
onto said table and in from said table onto said mandrel,
and means for rotating said table to loosely coil strip
material thereon as it is reeled from said mandrel and
to feed strip towards said mandrel as it is reeled onto
said mandrel.
2. Apparatus as claimed in claim 1 in which said
separate means for rotating said mandrel and presser
with respect to the table until it overlies a take up point
thereon that is traveling at the same speed that it is
travelling. At this point, it continues to travel with the (it) roll comprises drive means for rotating said mandrel
table and does not move with respect thereto. As in
and a drive means for rotating said presser roll,
dicated above the rate of rotation of the table is adjusted
3. Apparatus ‘as claimed in claim 1 in which said
such that the table takes up the unreeled strip in a spiral
table has an opening adjacent to its centre, and having
‘formation. This speed of the table is varied such that
means for moving said mandrel and table with respect
the said take up point travels spirally inwardly from
to each other whereby said mandrel can be dropped with
where the free end of the strip is secured to the table as
respect to said table.
at 54 along a spiral path upon which the steel is supported
4. Apparatus as claimed in claim 1 in which said table
with spaced apart gaps 99 as indicated. The continuously
has an opening adjacent to its centre, and having means
necessary changes in rotational speed of the table can
for moving said mandrel and table with respect to each
be controlled conveniently by means of a computer. 70 other whereby said mandrel can be dropped with re
Necessary changes in the speeds of the mandrel and pres
spect to said table, in which said separate means for ro
ser roll can also be controlled by means of a computer.
To increase the width of the gap 94} one would in
crease the speed of rotation of the table and keep the
speed of unreeling constant.
t will also be apparent that
tating said mandrel and presser roll comprises drive
means for rotating said mandrel and a drive means for
rotating said presser rolls.
5. Apparatus as claimed in claim 1 in which said
3,064,918
5
table is ‘formed with an opening adjacent its centre,
and in which there are means for moving said mandrel
6
table onto said mandrel, and means for rotating said
table to loosely coil strip material thereon as it is reeled
longitudinally of ‘the table through said opening in said
from said mandrel and to feed strip towards said man
drel as it is reeled onto said mandrel.
12. Apparatus as claimed in claim 11 in which said
6. Method of forming a tight coil of strip material
table has an opening adjacent to its centre, and having
to a loose coil strip material comprising the steps of
means for moving said mandrel and table with respect
supporting the tight coil for rotation with its rotational
to each other whereby said mandrel can be dropped with
axis substantially vertical, ?xing the outside end of the
respect to said table.
tight coil on a rotatable support surface outwardly of 10
13. Apparatus as claimed in claim 11 in which said
the tight coil a distance equal to the outside diameter of
table is formed with an opening ‘adjacent its centre, and
the loose coil to be wound, exerting a pressure against
in which there are means for moving said mandrel longi
the outside of the tight coil where the strip material ex
tudinally of the table through said opening in said table
tends therefrom, turning said tight coil about its axis
whereby said mandrel can be dropped beneath the surface
to unreel it from the point Where pressure is exerted
of said table.
thereagainst, and supporting the strip material on a side
14. Method of forming a tight coil of strip material to
edge thereof as it is unreeled onto said support surface
a loose coil strip material comprising the steps of sup
table whereby said mandrel can be dropped beneath the
surface of said table.
while continuously turning the support surface to loosely
coil the material inwardly of the place Where it is ?xed
unreeling of the tight coil such that there is a point
porting the tight coil for rotation with its rotational axis
substantially vertical, ?xing the outside end of the tight
coil on a rotatable support surface outwardly of the tight
coil a distance equal to the outside diameter of the loose
coil to be wound, turning said tight coil about its axis to
unreel it, and supporting the strip material on a side edge
thereon that travels at the same rate of speed as the
thereof as it is unreeled onto said support surface while
thereto as aforesaid. -
7. A method as claimed in claim 6 in which said sup
port surface is turned at a rate from the beginning of the
rate of speed of unreeling of strip from said tight coil 25 continuously turning the support surface to loosely coil the
said point moving spirally inwardly from where said
material inwardly of the place where it. is ?xed thereto
strip is attached to said surface towards the centre of
rotation as unreeling of the tight coil progresses, the
strip being loosely coiled as aforesaid on the locus of
as aforesaid.
terial into ‘a tight coil comprising the steps of supporting
support surface and said coil are turned about a common
15. A method as claimed in claim 14 in which said
support surface is turned at a rate from the beginning of
said point.
30 the unreeling of the tight coil such that there is a point
8. A method as claimed in claim 7 in which said
thereon that travels at the same rate of speed as the rate
support surface and said coil are turned about a com
of speed of unwinding of strip from said tight coil said
mon axis of rotation.
point moving spirally inwardly from where said strip
9. A method as claimed in claim 6 in which said
is attached to said surface towards the centre of rotation as
support surface and said coil are turned about a com 35 unwinding of the tight coil progresses, the strip being loose
mon axis of rotation.
ly ‘coiled as aforesaid on the locus of said point.
10. A method of forming a loose coil of strip ma
16. A method as claimed in claim 1.5 in which said
the loose coil on a side edge of the strip on a rotatable
axis of rotation.
support surface, securing the inside end thereof to a
17. A method ‘as claimed in claim 14 in Which said
mandrel at the centre of the loose coil rotating the man
support surface and said coil are turned about a common
drel and support surface at relatively differing coor
axis of rotation.
dinated speeds to wind the strip onto the mandrel while
‘18. A method of forming a loose coil of strip material
maintaining a drag on the strip wound onto the mandrel
into a tight coil comprising the steps of supporting the
by exerting a force against the outside lap of strip on 45 loose coil on a side edge of the strip on 'a rotatable sup
the mandrel.
port surface, securing the inside end thereof to a mandrel
11. Apparatus for converting a coil of strip material
at the centre of the loose coil, correspondingly and re
from a tight wind to a loose wind with a gap between
spectively rotating the mandrel and support surface to
adjacent laps comprising a rotatably mounted mandrel
wind the strip onto the mandrel.
adapted to grip the inside end of a coil of strip material, 50
a table having a support surface adapted to support a
loosely wound coil of strip material, means on said table
for securing the free end of a coil of strip material, its
References Cited in the ?le of this patent
UNITED STATES PATENTS
longitudinal axis substantially at right angles to the sup
1,869,004
Bedell et a1. __________ .._ July 26, 1932
port surface of said table and at the centre thereof, means 55
for rotating said mandrel to reel a coil of strip material
from said mandrel out onto said table and in from said
2,366,352
2,673,694
2,833,027
Paxson ______________ __ Jan. 2, 1945
Howell _____________ __ Mar. 30, 1954
Foster _______________ __ May 6. 1958
UNITED STATES PATENT OFFICE
CERTIFICATE OF CORRECTION
Patent N00 31064318
November 20, 1962
Douglas H“ Karen et ‘a1,
It is hereby certified that error appe ars in the above numbered pat
ent requiring correction and that the said L etters Patent should read as
corrected below.
a
Column 2, line 57‘ for nhaiving" read —— having ~—;
line 59Y for "havnig" read —- having ——; column 3, line 55,
for "in" read —— in to ——o
Signed and sealed this 6th day of August 1963“
(SEAL)
Attest:
DAVID L. LADD
ERNEST W. SWIDER
Attesting Officer
Commissioner of Patents
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