U.S. patent application number 10/339374 was filed with the patent office on 2003-07-24 for rolling train for rolling wire and light sections.
This patent application is currently assigned to SMS Meer GmbH. Invention is credited to Lemke, Jurgen.
Application Number | 20030136169 10/339374 |
Document ID | / |
Family ID | 7711677 |
Filed Date | 2003-07-24 |
United States Patent
Application |
20030136169 |
Kind Code |
A1 |
Lemke, Jurgen |
July 24, 2003 |
Rolling train for rolling wire and light sections
Abstract
A rolling mill line for rolling wire and light sections in which
the rolling stands of the prerolling and intermediate rolling
stages have alternating horizontal and vertical grooved roll pairs.
The oval grooves of rolls of one pair are converted by round
section grooves of a pair immediately downstream thereof and
axially spaced therefrom into a circular section and one or the
other of the two grooves can by axial transverse shifting, be
brought into or out of the rolling line.
Inventors: |
Lemke, Jurgen; (Malliss,
DE) |
Correspondence
Address: |
THE FIRM OF KARL F ROSS
5676 RIVERDALE AVENUE
PO BOX 900
RIVERDALE (BRONX)
NY
10471-0900
US
|
Assignee: |
SMS Meer GmbH
|
Family ID: |
7711677 |
Appl. No.: |
10/339374 |
Filed: |
January 9, 2003 |
Current U.S.
Class: |
72/226 ;
72/228 |
Current CPC
Class: |
B21B 2031/026 20130101;
B21B 2273/22 20130101; B21B 2269/14 20130101; B21B 1/18 20130101;
B21B 2013/003 20130101; B21B 39/18 20130101; B21B 13/12
20130101 |
Class at
Publication: |
72/226 ;
72/228 |
International
Class: |
B21B 039/00; B21B
041/04 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 9, 2002 |
DE |
10200441.2 |
Claims
I claim:
1. A rolling mill line for producing wire and light sections
comprising, along a path along which a workpiece is rolled
successively, prerolling and intermediate rolling stages upstream
from a final rolling stage and having, in said prerolling and
intermediate rolling stages at least one succession of grooved
horizontal roll pairs alternating with grooved vertical roll pairs
with the grooves of each roll pair defining a predetermined
workpiece cross section and an oval groove cross section of one
roll pair is followed by a circular groove cross section of a
successive roll pair axially spaced from said one roll pair.
2. The rolling mill line defined in claim 1 wherein said prerolling
and intermediate rolling stages have at least one sequence of a
multiplicity of said roll pairs successively engaging said
workpiece and having alternately oval and circular groove cross
sections.
3. The rolling mill line defined in claim 1 wherein said prerolling
and intermediate rolling stages have at least one sequence of a
multiplicity of said roll pairs successively engaging said
workpiece and including a beginning plurality of roll pairs with
oval groove cross sections followed by roll pairs having
alternately oval and circular groove cross sections.
4. The rolling mill line defined in claim 3 wherein each of said
sequences terminates in a roll pair with a circular groove cross
section.
5. The rolling mill line defined in claim 1 wherein at least one of
the rolls of at least one of said roll pairs or a roll stand
thereof is transversely shiftable into and out of the rolling mill
line.
6. The rolling mill line defined in claim 1 wherein the workpiece
emerging from a roll pair with an oval cross section is selectively
directable into a roll pair with an oval cross section or a roll
pair with a circular cross section.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a rolling mill or rolling
line for the rolling of wire or light sections and, more
particularly, to a rolling line having a prerolling stage, an
intermediate rolling stage and a finish rolling stage, utilizing
grooved rolls.
BACKGROUND OF THE INVENTION
[0002] Rolling lines having prerolling and intermediate rolling
stages upstream of the finish rolling stages may have, in these
stages, roll stands with respective roll pairs and so-called
grooved rolls which shape the workpiece. It is known to provide in
such lines (see EP 0 313 930) alternating horizontal and vertical
roll pairs and different patterns of grooves and hence different
cross sections of the workpiece as rolled by those grooved
rolls.
[0003] However, the earlier system does not allow, for example,
diversion of the workpiece with a circular cross section at a
particular dimension from the rolling line and, as a consequence,
may utilize an excessive number of rolls where fewer pairs of rolls
could be used.
OBJECTS OF THE INVENTION
[0004] It is therefore the principle object of the present
invention to provide an improved a rolling line for the purposes
described, i.e. for the rolling of wire or light sections, which
enables a more efficient use of the rolling mill components than
has been the case hereto.
[0005] Another object is this invention is to provide a mill line
for the purposes described which enables advantages of oval-oval
rolling sequences to be obtained together with those of
oval-circular rolling sequences.
[0006] It is yet another object of this invention to provide a
rolling line which is more versatile and efficient than the prior
art rolling line described.
SUMMARY OF THE INVENTION
[0007] These objects and others which will become apparent
hereinafter are attained, in accordance with the invention, in a
rolling mill line for producing wire and light sections comprising,
along a path along which a workpiece is rolled successively,
prerolling and intermediate rolling stages upstream from a final
rolling stage and having, in the prerolling and intermediate
rolling stages at least one succession of grooved horizontal roll
pairs alternating with grooved vertical roll pairs with the grooves
of each roll pair defining a predetermined workpiece cross section,
and wherein an oval groove cross section of one roll pair is
followed by a circular groove cross section of a successive roll
pair axially spaced from the one roll pair.
[0008] According to the invention, the prerolling and intermediate
rolling stages have at least one sequence of a multiplicity of the
roll pairs successively engaging the workpiece and having
alternately oval and circular groove cross sections.
[0009] The prerolling and intermediate rolling stages have at least
one sequence of a multiplicity of the roll pairs successively
engaging the workpiece and including a beginning plurality of roll
pairs with oval groove cross sections followed by roll pairs having
alternately oval and circular groove cross sections.
[0010] According to the invention, the rolling mill sequence or
each such sequence terminates in a roll pair, preferably a vertical
roll pair, with a circular groove cross section. It is a feature of
the invention that at least one of the rolls of at least one of the
roll pairs or a roll stand thereof is transversely shiftable into
and out of the rolling mill line.
[0011] Furthermore, the workpiece emerging from a roll pair with an
oval cross section is selectively directable into a roll pair with
an oval cross section or a roll pair with a circular cross
section.
[0012] With these features, the oval cross section grooves of the
rollers of one pair may be followed by a circular cross section
groove of a next roll pair at an axial spacing from the former. As
a result, round grooves can follow oval grooves with selected roll
pairs of the sequence. Within the sequence, the roll pairs of a
first section can each be of one groove type, beginning with an
oval groove or cross section and then followed by alternating oval
and round or circular groove patterns. The last roll pair of the
sequence should only have a circular cross section. According to a
feature of the invention, one or the other of the grooved roll
pairs can be shifted into or out of the rolling line transversely
or displaced by shifting the roll stand. Finally, the workpiece can
pass from an oval groove selectively to another oval groove or to
the circular groove of a subsequent roll pair with deflection.
[0013] The most important advantage of the present invention is
that it enables the advantages of a starting arrangement of
oval-oval to be followed by an alternation of oval-circular
patterns. The oval-oval sequence enables better elongation in the
prerolling and intermediate rolling stages and with fewer roll
pairs. The provision of a roll pair of a circular groove section
alongside a stand with a roll pair of oval cross section enables a
large number of circular section workpieces to be fed to the
finishing rolls and in practice, this has also allowed the number
of finishing rolls to be reduced. The finishing roll system may be,
for example, a single universal rolling mill. A further advantage
is that the circular groove section of the roll pair can close less
strongly because it is used only to establish the requisite
dimension of a circular section workpiece. The total number of
rolling stands of the rolling line can be of even number or of odd
number with the invention while the number of mill stands limited
to oval-circular groove sequences must always be an even
number.
BRIEF DESCRIPTION OF THE DRAWING
[0014] The above and other objects, features, and advantages will
become more readily apparent from the following description,
reference being made to the accompanying drawing in which:
[0015] FIG. 1 is a diagram showing a first sequence of groove roll
patterns for a rolling line for the rolling of wire or light
sections according to the invention, characterized especially by an
alternation of oval and circular groove sections;
[0016] FIG. 2 is a view similar to FIG. 1 showing another pattern
in which an oval-oval sequence and a parallel circular-circular
sequence pattern can be provided;
[0017] FIG. 3 is a diagram of another pattern according to the
invention in which an initial oval-circular pattern is followed by
an oval-oval pattern with a parallel groove sequence of
circular-circular pattern; and
[0018] FIG. 4 is a diagram of a rolling line which can embody these
patterns.
SPECIFIC DESCRIPTION
[0019] Referring first to FIG. 4, I have shown a rolling line 10 in
which the workpiece 11 is rolled in succession by a prerolling
stage 12, an intermediate rolling stage 13 and a finishing stage
14, the latter imparting the final dimensions and shape to the
product 15 which emerges as the rolled wire or light section. The
finishing stands are not relevant to the present invention which
concerns the prerolling stage 12 and the intermediate stage 13 and
thus the finishing stand has been shown only in a block form. The
prerolling and intermediate stage have alternating pairs of
vertical rolls 16 and horizontal rolls 17 or horizontal rolls 18
and vertical rolls 19 and the rolls of each stage merely represent
multiplicities of such alternating roll pairs.
[0020] Each pair of rolls has grooves 20 and 21 as denominated only
for the roll pair 16 and those grooves cooperate to impart to the
workpiece, according to this invention, either an oval cross
section or a round or circular cross section. The roll pairs can be
provided with shifters represented generically at 22 which allow
roll pairs to be moved closer together or further apart in the
rolling direction 23 as represented by the arrow 24 or enable the
roll pairs to be shifted transversely (double-headed arrow 25) to
the rolling line and the rolling direction 23. Furthermore,
diverters can be provided to divert the workpiece to parallel lines
or to parallel pairs of vertical and horizontal rolls and then back
into the line shown in FIG. 4.
[0021] As can be seen from FIG. 1, the prerolling stage or the
intermediate stage or both may roll the workpiece in the pattern
shown in FIGS. 1, 2 and 3, these patterns being the cross sections
produced by the horizontal rolls H and the vertical rolls V which
alternate with one another as defined by the respective
grooves.
[0022] Turning to FIG. 1, it can be seen that preshaped workpieces
WSR or WSQ of circular or square cross section can be fed to the
rolling line WS1 which can represent one sequence of the rolls of
the prerolling and intermediate rolling stages and can be but one
of several such sequences. Each of the groove patterns of a roll
pair can be treated as equivalent to one of the cross sections
shown and thus represents the roll pair and the respective roll
stand.
[0023] In the sequence of FIG. 1, there is an alternating pattern
of horizontal and vertical roll pairs 1H, 2V, 3H, 4V, 5H, 6V, 7H
and 8V, the numbers representing the successive roll pairs and the
letters indicating whether the roll pairs are horizontal or
vertical roll pairs.
[0024] Of these roll pairs, the horizontal roll pairs 1H, 3H, 5H
and 7H each have grooves forming oval cross sections and thus are
illustrated as ovals in the groove patterns show in FIG. 1. The
vertical roll pairs, correspondingly, at 2V, 4V, 6V and 8V, each
are of circular groove cross section.
[0025] The round or square workpiece WSR or WSQ enters the first
horizontal roll pair 1H and is shaped therein to an oval and then
back to a circular section in the following roll pairs and on
through the sequence alternating between oval and round, to leave
the sequence at a vertical roll pair 8V with a circular cross
section to enter the section rolling stands 14 (see FIG. 4).
[0026] The groove arrangement of the rolling line WSI allows the
round or wire to be brought out from the line after passage through
any of the vertical roll pairs 2V to 8V with the desired shape and
an appropriate dimension for finish rolling without the need to
pass through further preliminary or intermediate stages.
[0027] FIG. 2 shows a different approach for the rolling line WSII.
The preprofiled workpiece WSR or WSQ, which is of circular or
square cross section is fed to the line WL which has sequences of
alternating horizontal and vertical roll pairs 1H, 2V, 3H, 4V, 5H,
6V, 7H, 8V and of these roll pairs 1H and 8V correspond to those of
FIG. 1 and are respectively a horizontal roll pair with an oval
groove position and a vertical roll pair with a circular groove
position. The last roll pair of the sequence reshapes the workpiece
from an oval cross to a round cross section in a circular groove
pattern.
[0028] The roll pairs for the sections 2V, 3H, 4V, 5H, 6V and 7H
are all oval sections and may alternate in the direction of
elongation of the oval. These roll pairs may, as has been described
in connection with FIG. 4, be shifted transversely to the rolling
line WL as represented by the double headed arrow P1 and into and
out of this line. Instead of this shifting action, the workpiece
can be deflected as indicated by the single head inclined arrow and
via a deflector that shown at 26, to rolls with circular cross
section grooves. From each circular section set of rolls, the
workpiece can be extracted with the desired shape for further
processing, e.g. in the finishing stands at 14.
[0029] The arrangement according to FIG. 3 differs from that of
FIG. 2 in that in the rolling train WSIII, the first few roll pairs
alternate as shown in FIG. 1 while the remainder of the roll pairs
correspond to the pattern in FIG. 2.
* * * * *