U.S. patent application number 09/738867 was filed with the patent office on 2001-09-27 for rolling method for a profiled section, in particular, a flange section, and universal roll stand therefor.
Invention is credited to Hartmann, Ralf, Minnerop, Michael.
Application Number | 20010023605 09/738867 |
Document ID | / |
Family ID | 7935168 |
Filed Date | 2001-09-27 |
United States Patent
Application |
20010023605 |
Kind Code |
A1 |
Hartmann, Ralf ; et
al. |
September 27, 2001 |
Rolling method for a profiled section, in particular, a flange
section, and universal roll stand therefor
Abstract
In a rolling method for a profiled section performed in a
universal roll stand with horizontal rolls and vertical rolls
having a vertical roll center, hydraulic cylinder units configured
to adjust the horizontal rolls are provided. The horizontal rolls
are adjusted with the hydraulic cylinder units, based on a preset
nominal horizontal roll gap, toward one another to form an actual
horizontal roll gap, wherein the horizontal rolls are adjusted with
the preset nominal horizontal roll gap symmetrically relative to
the vertical roll centers. An additional nominal value is supplied
to the hydraulic cylinder units and, based on the additional
nominal value, the horizontal rolls are vertically adjusted in the
same direction by the same amount. The vertical rolls are adjusted
toward the horizontal rolls to form actual vertical roll gaps. A
universal roll stand for performing the device is also
described.
Inventors: |
Hartmann, Ralf; (Dusseldorf,
DE) ; Minnerop, Michael; (Ratingen, DE) |
Correspondence
Address: |
Friedrich Kueffner
Suite 1921
342 Madison Avenue
New York
NY
10173
US
|
Family ID: |
7935168 |
Appl. No.: |
09/738867 |
Filed: |
December 15, 2000 |
Current U.S.
Class: |
72/225 |
Current CPC
Class: |
B21B 2263/02 20130101;
B21B 37/16 20130101; B21B 38/105 20130101; B21B 37/62 20130101;
B21B 2273/22 20130101; B21B 31/32 20130101; B21B 39/12 20130101;
B21B 2013/106 20130101 |
Class at
Publication: |
72/225 |
International
Class: |
B21B 013/10 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 30, 1999 |
DE |
199 64 040.8 |
Claims
What is claimed is:
1. A rolling method for a profiled section in a universal roll
stand with horizontal rolls and vertical rolls having a vertical
roll center, the method comprising the steps of: providing
hydraulic cylinder units configured to adjust the horizontal rolls;
adjusting the horizontal rolls with the hydraulic cylinder units,
based on a preset nominal horizontal roll gap, toward one another
to form an actual horizontal roll gap, wherein the horizontal rolls
are adjusted with the preset nominal horizontal roll gap
symmetrically relative to the vertical roll centers; supplying an
additional nominal value to the hydraulic cylinder units and, based
on the additional nominal value, vertically adjusting the
horizontal rolls in the same direction by the same amount;
adjusting the vertical rolls toward the horizontal rolls to form
actual vertical roll gaps.
2. The method according to claim 1, wherein the additional nominal
value is supplied before rolling the profiled section.
3. The method according to claim 1, wherein the additional nominal
value is supplied during rolling of the profiled section.
4. The method according to claim 1, further comprising the steps of
comparing the profiled section after rolling with a nominal
profiled section and determining the additional nominal value based
on the comparison of the profiled section after rolling with the
nominal profiled section.
5. The method according to claim 4, further comprising the step of
providing a control unit, wherein the step of comparing and the
step of determining are performed in the control unit.
6. The method according to claim 1, further comprising the step of
providing hydraulic cylinder units configured to adjust the
vertical rolls to the actual vertical roll gap.
7. The method according to claim 1, further comprising the step of
vertically adjusting at least one of a component for the profiled
section arranged upstream of the roll stand and a component for the
profiled section arranged downstream of the roll stand based on the
additional nominal value.
8. A universal roll stand for rolling profiled sections, the
universal roll stand comprising: horizontal rolls and vertical
rolls having a vertical roll center; first control elements
configured to adjust the horizontal rolls, based on a preset
nominal horizontal roll gap, toward one another to form an actual
horizontal roll gap, wherein the horizontal rolls are adjusted with
the preset nominal horizontal roll gap symmetrically relative to
the vertical roll centers; second control elements configured to
adjust the vertical rolls toward the horizontal rolls to form
actual vertical roll gaps; wherein the first control elements are
hydraulic cylinder units and wherein the hydraulic cylinder units
are configured to vertically adjust, based on an additional nominal
value, the horizontal rolls in the same direction by the same
amount.
9. The universal roll stand according to claim 8, further
comprising a profiled section measuring device arranged downstream
of the horizontal and vertical rolls and configured to measure the
profiled section after rolling.
10. The universal roll stand according to claim 9, further
comprising a control unit connected to the profiled section
measuring device, wherein the control unit is configured to receive
a nominal profiled section, and wherein the control unit is
connected to the first control elements and configured to control
the horizontal rolls.
11. The universal roll stand according to claim 8, wherein the
second control elements are hydraulic cylinder units.
12. The universal roll stand according to claim 8, further
comprising at least one of a component for the profiled section
arranged upstream of the roll stand and a component for the
profiled section arranged downstream of the roll stand, wherein the
at least one component is configured to be vertically adjusted
based on the additional nominal value.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The invention relates to a rolling method for a profiled
section, in particular, a flange section, in a universal roll stand
with horizontal rolls and vertical rolls having a vertical roll
center, wherein the horizontal rolls are adjusted toward one
another to form an actual horizontal roll gap in accordance with a
preset nominal horizontal roll gap, wherein the vertical rolls are
adjusted toward the horizontal rolls to form an actual vertical
roll gap. The invention further relates to a universal roll stand
for this method.
[0003] 2. Description of the Related Art
[0004] Such a rolling method and a universal roll stand for such a
method are disclosed, for example, in German patent document DE 38
34 587 A1. In this document there is no mention of the horizontal
rolls being adjusted symmetrically relative to the vertical roll
center as a result of the nominal horizontal roll gap. However,
this is, in general, conventional.
[0005] In the aforementioned prior art a roll stand arrangement is
described which comprises two universal roll stands between which a
flange upsetting device is positioned. In the prior art, the
vertical position of the flange upsetting device is adjustable in
order to correct the stay center of the rolled profiled
section.
[0006] The method and the roll stand of the prior art operate
already sufficiently well, but not completely satisfactorily.
SUMMARY OF THE INVENTION
[0007] It is an object of the present invention to provide a
rolling method for a profiled section and a universal roll stand
for performing this method by which the profiled section can be
rolled in an improved way, in particular, with reduced
tolerances.
[0008] In accordance with the present invention, this is achieved
in that the horizontal rolls are adjusted by means of hydraulic
cylinder units to form the actual horizontal roll gap and in that
an additional nominal value is supplied to the hydraulic cylinder
units based on which the horizontal rolls are adjusted vertically
in the same direction by the same amount.
[0009] In accordance therewith, the object is solved for the
universal roll stand in that the control elements for the
horizontal rolls are hydraulic cylinder units and in that an
additional nominal value is supplied to the control elements for
the horizontal rolls based on which the horizontal rolls can be
adjusted vertically in the same direction about the same
amount.
[0010] It is possible to supply the additional nominal value before
rolling of the profiled section and not to change it during
rolling. However, hydraulic cylinder units can also be adjusted
when under load. Accordingly, it is therefore also possible to
change the additional nominal value during rolling of the profiled
section.
[0011] The rolling method provides especially good results when the
rolled profiled section is compared with a nominal profiled section
and the additional nominal value is determined based on the
comparison of the rolled profiled section with the nominal profiled
section.
[0012] When the comparison of the rolled profiled section with the
nominal profiled section and the determination of the additional
nominal value is carried out in a profiled section control unit, an
automatic optimization of the additional nominal value is
performed. With such an automated control method, a change of the
additional nominal value is particularly expedient also during
rolling of the profiled section.
[0013] When the vertical rolls are adjusted by hydraulic cylinder
units to form the actual vertical roll gap, a completely
hydraulically operated universal roll stand results.
[0014] When a component for the profiled section arranged upstream
of the horizontal and vertical rolls and/or a component for the
profiled section arranged downstream of the horizontal and vertical
rolls are/is vertically adjusted as a result of the additional
nominal value, bending stresses can be influenced in a directed way
in the profiled section to be rolled or in the already rolled
profiled section. In particular, the bending stresses can be
minimized. The vertical adjustment of the component arranged
upstream and/or the component arranged downstream can be carried
out, depending on the component, in the same or opposite direction
and can be of the same magnitude or smaller than the additional
nominal value.
BRIEF DESCRIPTION OF THE DRAWING
[0015] In the drawing:
[0016] FIG. 1 shows a front view of a universal roll stand
according to the present invention;
[0017] FIG. 2 illustrates an advancing and adjusting method for
horizontal rolls according to the present invention; and
[0018] FIG. 3 shows a side view of the universal roll stand of FIG.
1.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0019] According to FIG. 1, a profiled section 1 is to be rolled in
a universal roll stand. The profiled section 1 according to FIG. 1
is a symmetric double T profiled section (I beam). The profiled
section could also be a profiled section in the form of a rail, an
X beam, a T beam or any other profiled section.
[0020] The universal roll stand has horizontal rolls 2, 3 and
vertical rolls 4, 5. The vertical rolls 4, 5 have vertical roll
centers 6, 7. The vertical rolls 4, 5 are mounted such in the
universal roll stand that their vertical roll centers 6, 7 are
arranged at the same level.
[0021] Control elements 8-11 are correlated with the rolls 4-7. The
control elements 8-11 are hydraulic cylinder units.
[0022] It is possible to coarsely pre-adjust the rolls 4-7 by
further control elements (not shown), in particular,
electromechanical control elements. The decisive feature however is
that the adjustment of the roll gaps in the load-free state as well
as under load is carried out by hydraulic cylinder units 8-11. By
means of presetting corresponding nominal horizontal or vertical
roll gaps h*, v1*, v2*, the horizontal rolls 2, 3 are thus adjusted
in accordance with nominal horizontal roll gap h* relative to one
another to form an actual horizontal roll gap h. The vertical rolls
4, are adjusted relative to the horizontal rolls 2, 3 to actual
vertical roll gaps v1, v2. The advancing and adjusting of the rolls
2-5 is carried out always by means of the hydraulic cylinder units
8-11.
[0023] According to FIG. 2, at the starting point t0 the nominal
horizontal roll gap h* is supplied to the horizontal rolls 2, 3 or
their hydraulic cylinder units 8, 9. At the same time, an
additional nominal value o* is supplied to the horizontal rolls 2,
3 or their control elements 8, 9.
[0024] As a result of providing the two nominal values h*, o*, the
horizontal rolls 2, 3 are adjusted relative to the vertical roll
centers 6, 7 to the actual adjusting positions x1, x2. The actual
adjusting positions x1 of the upper horizontal roll 2 then is
x1=h*/2 +o*. The actual adjusting position x2 of the lower
horizontal roll 3 is x2=-h*/2+o*. The zero line is defined in this
connection by the coinciding vertical roll centers 6, 7.
[0025] Accordingly, the horizontal rolls 2, 3 are symmetrically
adjusted relative to the vertical roll centers 6, 7 as a result of
the nominal horizontal roll gap h*. As a result of the additional
nominal value o*, on the other hand, the horizontal rolls 2, 3 are
vertically adjusted in the same direction by the same amount. Thus,
a vertical movement of the horizontal rolls 2, 3 relative to the
vertical roll centers 6, 7 results, while the actual horizontal
roll gap h formed between the horizontal rolls 2, 3 is
maintained.
[0026] The nominal values h*, v1*, v2*, o* are usually supplied
before rolling of the profiled section 1. The profiled section 1 is
introduced only at the entry time t1 into the universal roll stand
which is after the starting time t0. At a later time t2 the
profiled section 1 exits the universal roll stand.
[0027] In general, the nominal roll gaps h*, v1*, v2* as well as
the additional nominal value o* are kept constant during rolling of
the profiled section 1. However, it is also possible to change the
values h*, v1*, v2*, o* during rolling of the profiled section 1.
For example, at a time t3, which is between the entry time t1 and
the exit time t2, a new additional nominal value o* can be
provided. Also, a change of the nominal roll gaps h*, v1*, v2* is
possible.
[0028] According to FIG. 3, a profiled section measuring device 12
is arranged downstream of the horizontal and vertical rolls 2-5. By
means of the profiled section measuring device 12 the rolled
profiled section 1 can be measured. The profiled section measuring
device 12 is connected with a profiled section control unit 13 in a
control-technological way. A nominal profiled section P* can be
supplied to the profiled section control unit 13. The profiled
section control unit 13 compares the rolled profiled section 1 with
the nominal profiled section P* and determines the additional
nominal value o* based on the comparison.
[0029] The profiled section control unit 13 is
control-technologically connected with the control elements 8, 9
for the horizontal rolls 2, 3. Accordingly, it can directly
transmit the additional nominal value o* to the control elements 8,
9. The transmission can be carried out, as desired, continuously or
discrete, i.e., between two profiled sections 1 to be rolled.
[0030] As can be seen also in FIG. 3, a roller table 14 for the
profiled section 1 is arranged upstream of the horizontal and
vertical rolls 2-5. Moreover, a flange upsetting device 15 is
arranged downstream of the horizontal and vertical rolls 2-5. The
roller table 14 and the flange upsetting device 15 are components
14, 15 arranged upstream and downstream of the universal roll
stand, respectively. The components 14, 15 can be vertically
adjusted by control elements 16, 17. The control elements 16, 17
can also be in the form of hydraulic cylinder units. The additional
nominal value o* is also supplied to the components 14, 15 or their
control elements 16, 17. Accordingly, the components 14, 15 can
also be vertically adjusted based on the additional nominal value
o*. The vertical adjustment of the components 14, 15 can thus be in
the same or opposite direction and can be as large or smaller than
the additional nominal value o*. For example, the roller table 14
can be adjusted in the same direction by the same amount as the
horizontal rolls 2, 3 based on the additional nominal value o*,
while the flange upsetting device 15 can be moved in the opposite
direction by a fraction of the additional nominal value o*.
[0031] With the rolling method according to the invention and the
corresponding universal roll stand, a vertical adjustment of the
horizontal rolls 2, 3 in the same direction is made possible, in
particular, during rolling of the profiled section 1. Furthermore,
significantly smaller tolerances can be met with the method and
device of the present invention than with the prior art.
[0032] While specific embodiments of the invention have been shown
and described in detail to illustrate the inventive principles, it
will be understood that the invention may be embodied otherwise
without departing from such principles.
* * * * *