U.S. patent application number 13/129403 was filed with the patent office on 2011-11-10 for method of and apparatus for winding strip, in particular metal strip.
Invention is credited to Heinrich Roese, Micheal Zielenbach.
Application Number | 20110271732 13/129403 |
Document ID | / |
Family ID | 42338871 |
Filed Date | 2011-11-10 |
United States Patent
Application |
20110271732 |
Kind Code |
A1 |
Roese; Heinrich ; et
al. |
November 10, 2011 |
METHOD OF AND APPARATUS FOR WINDING STRIP, IN PARTICULAR METAL
STRIP
Abstract
An apparatus (1) for winding a strip (3), in particular a metal
strip of varying thickness, into a coil (2) with a device for
applying a deformable material onto the strip (3) that is to be
wound, characterized in that the device comprises means (11, 22)
for creating a resilient, in particular an elastic material or a
self-expanding or foaming material for placement onto the coil
(2).
Inventors: |
Roese; Heinrich;
(Hilchenbach, DE) ; Zielenbach; Micheal; (Siegen,
DE) |
Family ID: |
42338871 |
Appl. No.: |
13/129403 |
Filed: |
January 27, 2010 |
PCT Filed: |
January 27, 2010 |
PCT NO: |
PCT/EP2010/000468 |
371 Date: |
June 13, 2011 |
Current U.S.
Class: |
72/214 |
Current CPC
Class: |
B65H 2301/4127 20130101;
H04S 3/002 20130101; B65H 18/00 20130101; H04R 5/02 20130101; B21C
47/04 20130101; B21C 47/006 20130101; H04R 1/403 20130101; B21C
47/26 20130101; H04S 2420/13 20130101; B65H 2701/173 20130101; B21C
37/065 20130101 |
Class at
Publication: |
72/214 |
International
Class: |
B21C 47/00 20060101
B21C047/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 30, 2009 |
DE |
102009006761.2 |
Dec 5, 2009 |
DE |
102009057180.9 |
Claims
1-13. (canceled)
14. In combination with an apparatus for winding a strip of varying
thickness into a coil, means for creating a resilient,
self-expanding, or foamable material; means for applying the
material to the strip being wound immediately upstream in a
strip-travel direction of the coil into which the apparatus is
winding the strip; a roller radially engageable with the coil being
wound downstream from the means for applying; and means for
pressing the roller against the coil in order to deform the
material that has been applied by compressing it.
15. The combination defined in claim 14, wherein the means for
applying has a scraper or nozzles for spraying or squirting the
material onto the strip.
16. The combination defined in claim 14, wherein the means for
applying the material extends over the entire width of the coil or
at least over a large part of the width of the coil covering only
critical zones.
17. The combination defined in claim 14, wherein the material is
applied to the coil in strips.
18. The combination defined in claim 14, wherein the means for
applying is an extruder.
19. The combination defined in claim 14, wherein the means for
applying applies plastic to the strip as a one-piece layer or as a
plurality of strips next to each other on the coil with air
pockets.
20. The combination defined in claim 14, further comprising sensor
means for measuring the strip thickness of the strip; and control
means connected to the sensor means and to the means for applying
for regulating the application of the material in accordance with a
measured thickness to the strip so as to impart to the coil a
substantially cylindrical outer surface.
21. A rolling mill for cold rolling or warm rolling, one way or
reverse rolling of a metal strip of varying thickness, in
particular one that is flat or shaped, a flexibly and/or a
profile-rolled metal strip, in particular of steel, with a roll
stand provided with a set of rollers and an adjustment system for
adjusting the roll gap, an apparatus upstream of the roll stand for
unwinding the metal strip to be rolled and a winding apparatus
downstream of the roll stand defined in claim 14, wherein a
controller for controlling the rotational rate of the drives of the
to two winding apparatuses has a controller for compensating or
regulating the mass flow changes of the roll strip and the strip
tension speed dependent on same, as well as for controlling the
strip tension, in particular at those points in time at which the
strip acceleration changes due to a variation in the thickness of
the strip profile.
22. In a method of winding a strip of varying thickness into a
coil, the improvement comprising the step of: applying deformable
material to a surface the strip immediately before winding it into
the coil by nozzles or at least one scraper.
23. The method defined in claim 22, wherein the material os applied
to the metal strip at a thickness that is greater than a deviation
of thickness of the metal strip and that subsequently a force is
exerted by a roller onto the uppermost portion of coil in order to
compress the material in such a way that at least an essentially
cylindrical composite coil is created by the metal strip and the
material.
24. The method defined in claim 22, wherein the material is made to
expand or foam shortly before application or during application as
the result of the addition of an additive.
25. The method defined in claim 24, wherein the material is induced
to expand or foam or harden shortly before or during application by
means of irradiation.
Description
[0001] The invention relates to an apparatus for winding a strip of
varying thickness, in particular a flat or profiled strip, a
flexibly and/or a profile-rolled metal strip, in particular of
steel, into a coil with a device for applying a deformable material
to the strip being wound.
[0002] Above all, the invention concerns the winding of slit
strips. Slit strips are created when elongated material, in
particular wide metallic strip, is pulled off a coil and cut
longitudinally into narrow strips, i.e. split. The thus created
narrow split strips are subsequently wound up on a common mandrel
or wound onto separate respective mandrels. Preferably, composite
coils each containing a number of adjacent split strips are
created. To adjust for deviations in thickness over the width of
the strip, which lead to tapered or angled surfaces in particular
at the edges of the strips, while winding the split strips,
intermediate layers must be inserted into the coils of the split
strips.
[0003] Even when winding split strip material onto a continuous
drum with several coaxially adjacent winding coils of longitudinal
machines that are separated from each other by sheet metal disks,
as a consequence of varying strip thickness and coating thickness
more or less tightly wound coils with correspondingly different
strip sagging results. The uneven winding of the coils has a
disadvantageous effect on their appearance, packaging, the
unwinding behavior and the friction between the individual strip
coils. In order to avoid these problems it is known to wind paper
or cardboard strips of appropriate lengths between the turns of the
split strips. Frequently, this is done in that the paper strip is
manually inserted into the wound section slot between the winding
strip and the coil.
[0004] A device is known from DE 80 06 563 [DE 30 09 200] for
fitting spacer strips into the winding slot of strip material that
is to be wound into coils, where the paper strip is transported in
the direction toward the winding slot by a pair of drive rollers.
Here, the supply for the paper strip is designed as a drum that
contains the intermediate paper strip, upstream of whose strip slot
the pair of driving pulleys that are driven by an electric motor is
provided. Upstream of the pair of driving pulleys a strip
separating and perforating device is provided. This way, the
intermediate strip can be projected into the winding slot at high
speed as the result of the pair of driving pulleys with
simultaneous temporary deformation into a stable, air-carried
profile that is open toward the bottom. The intermediate strip must
be deformed by the roof-shaped profiling of the driving pulleys in
such a way that it retains a sufficiently stable shape that is
supported by air that ensures that it can also be shot into the
winding slot across a larger distance of free flight, whereby in
addition to the effect of being borne by air, the effect of
acceleration is also utilized.
[0005] The intermediate strips are either removed from a stack
container containing the strips in appropriate lengths and
individually shot into the wound section of the metal strip or
pulled off a supply strip coil and cut into the required
lengths.
[0006] In EP 0 166 795, a method of winding several split strips
created by longitudinal cutting of linear material onto a joint
winding mandrel is described, in which the elongated material
deviates in thickness over its width.
[0007] The method is characterized in that the split strips are
wound simultaneously into a composite coil with a deformable
elongated intermediate layer of adjacently running split strips
across its width.
[0008] Here, the thickness of the intermediate layer is larger than
the deviation of thickness over the width of the elongated
material. During winding of the split strips, as the result of the
exertion of a force onto the respectively uppermost winding
position of the split strips and/or the intermediate layer in the
radial direction of the composite coil, the thicker split strips
are pressed more than the thinner ones into the intermediate layer,
and the split strips are wound by a corresponding deformation of
the intermediate layer into a composite coil with cylindrical
enveloping surface. As per this method, uncoated or coated metallic
strip can be wound as elongated material. Preferably, paper, mash,
plastic, in particular, foam or paper impregnated with an agent
that protects against corrosion is used.
[0009] Further, it is also known to not only produce flat metal
strips, but also metal strips whose shape varies in the
longitudinal and/or the transverse direction. In DE 198 31 882 A1,
a method and a rolling system for the production of profiles of any
thickness over the width of a linear rolling stock is described.
The initial material is here deformed almost only in the direction
of width by several rollers that are offset spaced apart other in
the roll direction. The rolls make a correspondingly desired
profiling of the locally targeted deformation possible, the depth
of penetration depending on the control of the respective
individual small drums or rolls. The starting material is either
iron or a NE material; cold-forming or warm-forming is used.
[0010] From DE 199 62 754 [U.S. Pat. No. 6,336,349], a method of
flexible rolling of a metal strip is known. This method is for the
production of flat metal strips that have defined, varying strip
thicknesses over their length. Thus during the roll process the
roll gap is changed in a controlled manner in order to obtain
various strip thicknesses of the metal strip. On the one hand, this
can take place indirectly by changing the deformation resistance of
the material by warming or cooling the metal strip and the
correspondingly changed frame spring of the roll stand during the
roll process.
[0011] EP 1 074 317 [U.S. Pat. No. 6,336,350] also concerns a
method of flexible rolling of a metal strip, where the metal strip
is guided during the rolling process through a roll gap formed
between two working rolls and the roll gap is manipulated in a
controlled manner during the roll process in order to achieve
various strip thicknesses over the length of the metal strip. Here,
during each adjustment of the roll gap or directly afterward, the
bending lines of the working rolls are controlled depending on the
roll gap that was selected for flattening the metal strip.
[0012] It is the object of the invention to provide a method of
winding a strip, in particular a flat or profiled strip, a flexibly
rolled and/or a profile-rolled metal strip that is improved in such
a way that in a simple manner, an even, at least essentially
cylindrical coil is created.
[0013] In accordance with the invention, this object of the method
mentioned is attained in that the device comprises means for
creating a resilient, in particular elastic, material or a
self-expanding or foamable material and for applying it to the
coil.
[0014] According to the invention, the necessary materials are
prepared in situ corresponding to the requirements of the strip to
be wound, i.e. by considering the consistency of its surface, as
well any deviation from the roundness that is to be expected of the
coil that is to be wound, in order to provide an elastic substance,
in particular, a solidifying foam that is projected into the coil
to such a degree that a completely or nearly round coil is created.
This way, the apparatus in accordance with the invention is
particularly suited for winding metallic split strips, in
particular of steel, but also other strip materials, perhaps made
of plastic, for example, thermosetting plastics or thermoplastic
resins. The materials serving as intermediate layer in accordance
with the invention preserve the strip surfaces and improve the
ability of winding. The advantages of evenly wound coils are also
reflected in better transportability and in the facilitation of
further processing. Even changes in the thickness of the strip,
whether in longitudinal or transverse direction can be set at any
time by changing the application of the material.
[0015] Advantageous further developments of the invention are given
by the subordinate claims.
[0016] According to the invention, the material of the intermediate
layer is doctored onto the uppermost layer of the wound section of
the strip with a scraper or sprayed or squirted out of series of
adjacent nozzles onto the surface of the wound section. The
material, for example a plastic foam can thereby also be sprayed on
across the width that corresponds to the desired application
thickness in various thicknesses, and individually over certain
zones of the width of the roll. Even in the case of coating with a
scraper, the scraper is either set for the entire width of the roll
at the same distance or it is angled relative to the axis of
rotation of the roll in order to compensate for the emerging
tapered winding of the coil.
[0017] Preferably, the device extends over the entire width of the
coil or at least over a large part of the width of the coil. In the
latter case, only the critical zones are covered in which according
to experience irregularities tend to form to a greater degree.
[0018] In a further advantageous embodiment of the invention the
material is applied to the roll in strips. On the one hand, this
approach makes it possible to use as little as possible of the
intermediate material, on the other hand, as the result of a force
exerted radially onto the coil by material during application, the
material can escape into sections between the strips, in order to
thus create an optimally round coil.
[0019] In a different embodiment of the invention, the plastic is
advantageously applied to the coil from an extruder.
[0020] To increase elasticity the plastic is formed by a continuous
layer or is formed by a number of adjacent strips in the roll
direction of the strip that have air pockets. On foaming, air or a
different gas is inserted into the hardening plastic corresponding
to the desired elasticity, in order to later compress the
intermediate layer either under its own weight or that of the
material to be wound or subject to the influence of a radially
exerted contact force.
[0021] In order to improve application of the material layer even
more, a device for measuring the strip thickness of the metal strip
that is to be wound can be employed that transmits the strip
thickness values measured by it to a controller. It then derives a
control variable from the signals corresponding to the strip
thicknesses, in order to control the material delivery from the
nozzles, the addition of the foaming material, of air and the like
corresponding to the measured strip thickness of the metal strip or
in the case of a scraper, adjust its position at the roll outer
surface.
[0022] The invention also relates to a rolling mill for cold or
warm rolling, one-way or reverse rolling of a metal strip of
varying thickness, in particular a flat or profiled strip, a
flexibly or a profile-rolled metal strip, in particular of steel,
with a roll stand provided with a set of rollers and a control
system for adjusting the roll gap, with a device upstream of the
roll stand for unwinding the metal strip and a winding apparatus
downstream of the roll frame as described above. This way, the
metal strip can have all types of profiles in the longitudinal
and/or transverse direction. The thickness of the strip can change
over the length and/or the width.
[0023] In accordance with the invention, the rolling mill
distinguishes itself in accordance with the invention in that a
controller for controlling the rotation speed of the drives of the
two winding apparatuses is provided by a controller for
compensating or regulating the mass flow change of the roll strip
and the strip tension speed that is dependent on it, as well as for
the control of the strip tension, in particular at the points in
time at which the strip acceleration changes and when the thickness
of the strip profile changes. Rolling of the strip can also take
place in an inline casting and rolling system at the end of which
an apparatus for winding a rolled strip is located.
[0024] The invention also relates to a method of winding a strip of
varying thickness, in particular a flat or profiled strip, a
flexibly and/or a profile-rolled metal strip, in particular of
steel, into a coil in which during winding deformable material is
applied to the coil.
[0025] The method is characterized in that the deformable material
is applied by nozzles or by at least one scraper to the surface of
the strip, in particular the metal strip. In accordance with the
invention, strips that have variable strip thickness in the
longitudinal and/or transverse direction can be wound. In
particular, the strips can have special profiles.
[0026] Advantageously, the method is further has the step of
applying material to the metal strip at a thickness that is larger
than the deviation of thickness of the metal strip, and that
subsequently, onto the respectively uppermost end of the coil a
force is exerted, in particular by a roll, in order to compress the
material in such a way that at least an essentially cylindrical
composite coil is created out of the metal strip and the
material.
[0027] In particularly advantageous manner, the method is performed
such that the material is induced to expand or foam as the result
of the addition of an additive shortly before application or during
application.
[0028] Various forms of irradiation can be used, in particular
shortly prior to the application or during the application, in
order to promote the expansion or the foaming and/or the
hardening.
[0029] In the following, the invention is explained in more detail
in an example of an embodiment. The sole FIGURE shows a device
movable transversely of a coil for spraying foam onto the uppermost
turn of the coil into the gap between the winding strip and the
coil.
[0030] A device 1 (FIGURE) for applying or spraying a plastic foam
onto a coil 2 of a metal strip 3 has a stationary base 4. It
carries two pairs of support blocks 5 for axles 6 on which
respective rollers 7 can rotate. The pairs of spaced rollers 7
serve to guide respective U-shaped guide rails 8 connected to a
support 9 for the device 1. They are so long that they project past
the support 9. The base 4 is projects transversely past the strip
width that is the same as the length of a winding mandrel 10, so
that the device 1 can be moved past or underneath the strip
upstream of the winding mandrel 10. At the end of the winding
process, the coil 2 reaches a maximum outside diameter. At the
beginning of the winding process, an extension 11 for spraying or
applying the plastic of device 1 is in an inner position 11' shown
by a dotted line in order to apply the material close to the
surface onto the metal strip 3, while it moves into an outer
position 11'' toward the end of the winding process.
[0031] The device 1 can pivot on the support 9, since the support 9
has a pivot axis 12 for two levers 13 that can be jointly pivoted
by a hydraulic actuator 14 that itself is pivoted at 15 on a pair
of support lugs 16 on the guide rails 8. The device 1 has a pair of
arms 17 pivoted on a threaded bolt 18 at free ends of the levers 13
and supported by a pair of rollers 19 on guide edges 20 of the
support 9.
[0032] The device 1 has a telescopic actuator 21 that is carried on
the arms 17 in order to position the extension 11 at a suitable
spacing from the surface of the strip 3 or in order to, for example
for cleaning, move it temporarily away from the coil 2. The
extension 11 preferably holds an exchangeable cartridge for
applying the application material that is preferably sprayed on by
one or more nozzles 22 spaced along the axis of winding mandrel
10.
[0033] At least one hose 23 can supply various substances required
to make the application medium, in particular also along with a
pressurized gas in order to force the substance that is to be
applied out of the cartridge. In addition, a heater (not shown) can
be provided in the proximity of the nozzles 22 to promote hardening
of the material that has been applied.
[0034] In place of a fluid, foam-like or viscous material, in
particular a plastic, a granulate, in particular along with a
plastic or an adhesive or a quilt-like material, for example, with
selectively optimized small cells can also be inserted into the
roll 2 in order to promote even winding. Depending on need, the
cells are intact, filled, at least in certain sections, with
suitable materials or media. These can then, subject to certain
pressure or temperature conditions, in particular after the
conclusion of the winding process, leave the cells.
[0035] According to the invention, the use of (here shown only
schematically) a contact pressure roll 24 can also be provided that
evens out the foam or the cushion material or the granulate located
in the coil 2 by pressing radially inward after it has been
applied.
REFERENCE NUMBERS
[0036] 1 device [0037] 2 coil/roll [0038] 3 strip [0039] 3'
position of strip 3 [0040] 4 base [0041] 5 support blocks [0042] 6
axles [0043] 7 rollers [0044] 8 guide rails [0045] 9 support [0046]
10 winding mandrel [0047] 11 extension [0048] 11' position of
extension 11 [0049] 11'' position of extension 11 [0050] 12
pivoting axis [0051] 13 pivoting lever [0052] 14 actuator [0053] 15
bearing [0054] 16 support lugs [0055] 17 pair of lugs [0056] 18
threaded bolt [0057] 19 pair of rolls [0058] 20 guide bar [0059] 21
operating control [0060] 22 nozzle [0061] 23 supply hose [0062] 24
contact pressure roll
* * * * *