EP1398089A1 - Pressure device for rolling mill - Google Patents
Pressure device for rolling mill Download PDFInfo
- Publication number
- EP1398089A1 EP1398089A1 EP01274224A EP01274224A EP1398089A1 EP 1398089 A1 EP1398089 A1 EP 1398089A1 EP 01274224 A EP01274224 A EP 01274224A EP 01274224 A EP01274224 A EP 01274224A EP 1398089 A1 EP1398089 A1 EP 1398089A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- stand
- screwdown
- source
- rolls
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/16—Adjusting or positioning rolls
- B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
- B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/16—Adjusting or positioning rolls
- B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
Definitions
- the invention relates to rolling and can be used in rolling sectional and sheet steels, non-ferrous and non-metal materials.
- a disadvantage of the screwdown mechanism of a conventional stand is a low speed and accuracy of adjusting a clearance between rolls.
- the travel speed of housing screws in the QUARTO stands of hot rolling finishing mill group 2000 is from 0.5 to Imm/s. (P.I. Poloukhin "Rolling", Moscow, METALLURGIYA Publishers, 1982).
- a low accuracy of rolling is also explained by an appreciable amount of springing of said stand screwdown mechanism elements.
- the travel speed of rods of hydraulic screwdowns (HS), according to these sources, is 2.5 mm/s. Accuracy of adjustment is limited by the springing of elements of a hydraulic screwdown and a degree of elastic deformation of oil accounting for about 0.5 to 1%.
- a disadvantage of the conventional screwdown mechanism is the impossibility to use it in updating the existing stands equipped with housing screws with an electromechanical drive means and hydraulic screwdowns which directly impact upon the rolls via chucks.
- An object of the invention is to update a screwdown, increase the travel speed of rolls and consequent precision of rolling.
- the screwdown mechanism of a stand comprising a hydraulic cylinder disposed between a stand housing and a chuck of a support roll is made up of a rod implemented from a permanent magnet, such as a barium oxide magnet, encompassed by an electromagnetic coil, at least two coils mounted in the chucks of support (press) rolls, which are disposed installed with respect to each other, and, along with this, one of them is connected with a d.c. source and the other - with a capacitor bank.
- the electromagnetic coil embracing the rod-magnet provides for regulating a rolling force within a tolerance zone by a thickness of strip, the electromagnetic coil connected with the d.c.
- the coil connected with a capacitor bank contributes to delicately adjusting a clearance between rolls (i.e. a thickness of strip) owing to issuing thereinto large quantity narrow current pulses of a corresponding sign.
- FIG. I showing a general diagram of a screwdown mechanism.
- the screwdown mechanism comprises a spherical bearing I supported by a frame 2 of a stand, a rod 3 composed of a permanent magnet means (for example, the barium oxide one), a body 4 of a hydraulic cylinder, a coil 5 connected to a d.c. source 6, a hydraulic system 7, a chuck 8, a coil 9 and a coil 10 both mounted in the chuck 8, a capacitor bank 11, a charging device 12, a control unit 13.
- Said frame 2, bearing I, body 4, chuck 8 are made of non-magnetic materials.
- the screwdown mechanism is operated in the following manner.
- the coarse adjustment of a clearance between rolls is carried out by feeding oil under pressure from a hydraulic system 7 for a rod 3, said coarse adjustment providing, at the time of rolling, a rolling force P h .
- a discharge current pulse is sent to a coil 10 from a capacitor bank 11 of a corresponding sign and a clearance between rolls is changed in a stand in a very short time span (1 ⁇ 10 5 A, ⁇ 10 -5 s).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The invention relates to rolling and can be used in rolling sectional and sheet steels,
non-ferrous and non-metal materials.
The technical task of the invention is to update a hydraulic screwdown, increase the
travel speed of rolls and consequent precision of rolling operations.
The screwdown mechanism of a stand comprising a hydraulic cylinder located
between a stand housing and a chuck of a support roll is comprised of a rod (3) embodied
as a permanent magnet, for example the barium oxide one, embraced by an
electromagnetic coil (5) connected with a d.c. source (6), at least two coils (9, 10) mounted
in the chucks (8) of support rolls coaxially disposed with respect to each other, of which
one is connected with the d.c. source (6) and the other is connected with a capacitor bank
(11).
Description
The invention relates to rolling and can be used in rolling sectional and sheet steels,
non-ferrous and non-metal materials.
Known in the art is a stand comprising a housing, rolls, a roll drive means and a
screwdown mechanism in the form of a screw (A.N.Tselikov "Machines and Aggregates of
Metallurgical Plants", vol. 3, Moscow, METALLURGIYA Publishers, 1981).
A disadvantage of the screwdown mechanism of a conventional stand is a low
speed and accuracy of adjusting a clearance between rolls. For instance, the travel speed of
housing screws in the QUARTO stands of hot rolling finishing mill group 2000 is from
0.5 to Imm/s. (P.I. Poloukhin "Rolling", Moscow, METALLURGIYA Publishers, 1982).
A low accuracy of rolling is also explained by an appreciable amount of springing of said
stand screwdown mechanism elements.
Also known is a hydraulic screwdown replacing housing screws or working in
combination therewith. (Firm SMS-Demag, the Third Congress of Rolling Mill Operators,
Lipetsk, 19-22 October, 1999. The report by Pelking "The Latest Technologies in Cold
Rolling"; the technological instruction TI 105-PHL-16-96, OAO Severstal, "Rolling of
Strips on Five-stand Cold-Rolled Sheet Production Mill 1700", 1996).
The travel speed of rods of hydraulic screwdowns (HS), according to these sources,
is 2.5 mm/s. Accuracy of adjustment is limited by the springing of elements of a hydraulic
screwdown and a degree of elastic deformation of oil accounting for about 0.5 to 1%.
Known is a stand (Patent RF 2138346, published 27.09.99. Bulletin No 27) which
is provided with two permanent magnet means located at the periphery of contact, with
respect to each other, with like poles, of which one is situated close to a press roll and the
other―close to a stand housing, both magnet means being provided with field coils for
magnetizing, demagnetizing, reversing the sense of magnetization and neutralizing the
magnetic fields and also with hydraulic cylinders for lifting and lowering repulsion magnet
means.
A disadvantage of the conventional screwdown mechanism is the impossibility to
use it in updating the existing stands equipped with housing screws with an
electromechanical drive means and hydraulic screwdowns which directly impact upon the
rolls via chucks.
An object of the invention is to update a screwdown, increase the travel speed of
rolls and consequent precision of rolling.
Said object is achieved owing to the fact that the screwdown mechanism of a stand
comprising a hydraulic cylinder disposed between a stand housing and a chuck of a support
roll is made up of a rod implemented from a permanent magnet, such as a barium oxide
magnet, encompassed by an electromagnetic coil, at least two coils mounted in the chucks
of support (press) rolls, which are disposed installed with respect to each other, and, along
with this, one of them is connected with a d.c. source and the other - with a capacitor bank.
The electromagnetic coil embracing the rod-magnet provides for regulating a rolling force
within a tolerance zone by a thickness of strip, the electromagnetic coil connected with the
d.c. source and mounted in the roll chuck provides the attraction or repulsion of the chuck
from a hydraulic cylinder piston, and the coil connected with a capacitor bank contributes
to delicately adjusting a clearance between rolls (i.e. a thickness of strip) owing to issuing
thereinto large quantity narrow current pulses of a corresponding sign.
A concept of invention is explained in Fig. I showing a general diagram of a
screwdown mechanism.
The screwdown mechanism comprises a spherical bearing I supported by a frame 2
of a stand, a rod 3 composed of a permanent magnet means (for example, the barium oxide
one), a body 4 of a hydraulic cylinder, a coil 5 connected to a d.c. source 6, a hydraulic
system 7, a chuck 8, a coil 9 and a coil 10 both mounted in the chuck 8, a capacitor bank
11, a charging device 12, a control unit 13. Said frame 2, bearing I, body 4, chuck 8 are
made of non-magnetic materials.
The screwdown mechanism is operated in the following manner.
The coarse adjustment of a clearance between rolls is carried out by feeding oil
under pressure from a hydraulic system 7 for a rod 3, said coarse adjustment providing, at
the time of rolling, a rolling force Ph. With variations of a thickness of strip within
thickness tolerance limits its adjustment is performed by supplying into coils 5 and 9, the
continuous currents of a corresponding sign, which permits obtaining a rolling force
P=Ph+Pem or P=Ph - Pem. With a polarity N-N, a chuck 8 is repulsed from the rod 3 with a
force Pem and then P=Ph+Pem, thus reducing a thickness of strip; with a polarity N-S, the
chuck 8 is attracted to the rod 3 with a force Pem and then P=Ph-Pem, thus increasing the
strip thickness.
In the event of an abrupt (unexpected) change, during rolling, in a thickness of
strip, a discharge current pulse is sent to a coil 10 from a capacitor bank 11 of a
corresponding sign and a clearance between rolls is changed in a stand in a very short time
span (1≈105 A, τ≈10-5s).
It is hence only logical to see that the invention allows one to use on the existing
mills, in addition to hydraulic screwdowns (HS), an electromagnetic screwdown to carry
out a more accurate rolling of strips.
Claims (1)
- The screwdown mechanism of a stand comprising a hydraulic cylinder disposed between a stand housing and a chuck of a support roll, characterized in that it is made up of a rod implemented from a permanent magnet means, say, the barium oxide one, which is embraced by an electromagnetic coil connected with a d.c. source, at least two coils mounted in the chucks of support rolls coaxially disposed with respect to each other, of which one is connected with the d.c. source and the other is connected with a capacitor bank.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2001111160A RU2187394C1 (en) | 2001-04-23 | 2001-04-23 | Screwd0wn mechanism of rolling stand |
| RU2001111160 | 2001-04-23 | ||
| PCT/RU2001/000526 WO2002090011A1 (en) | 2001-04-23 | 2001-12-05 | Pressure device for rolling mill |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1398089A1 true EP1398089A1 (en) | 2004-03-17 |
| EP1398089A4 EP1398089A4 (en) | 2005-08-10 |
| EP1398089B1 EP1398089B1 (en) | 2010-07-21 |
Family
ID=20248875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01274224A Expired - Lifetime EP1398089B1 (en) | 2001-04-23 | 2001-12-05 | Pressure device for rolling mill |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1398089B1 (en) |
| JP (1) | JP4111387B2 (en) |
| DE (1) | DE60142645D1 (en) |
| RU (1) | RU2187394C1 (en) |
| WO (1) | WO2002090011A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0641786U (en) * | 1992-11-17 | 1994-06-03 | 寛司 東 | Jigsaw puzzle |
| DE10312122B3 (en) * | 2003-03-13 | 2004-08-12 | Sms Demag Ag | Four-column rolling mill is designed to separate force transmission onto rollers from guidance of roller inserts |
| RU2348474C1 (en) * | 2007-05-24 | 2009-03-10 | Лев Георгиевич Делюсто | Screwdown structure of rolling mill |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3529720A1 (en) * | 1985-08-20 | 1987-03-05 | Mannesmann Ag | ARRANGEMENT OF A HYDRAULIC CONTROL CYLINDER |
| IT1239661B (en) * | 1990-02-28 | 1993-11-11 | Danieli Off Mecc | HYDRAULIC PRESSURE DEVICE |
| RU2141880C1 (en) * | 1998-04-03 | 1999-11-27 | Открытое акционерное общество "Северсталь" | Rolling stand |
| RU2138346C1 (en) * | 1998-04-03 | 1999-09-27 | Открытое акционерное общество "Северсталь" | Rolling stand |
| RU2146971C1 (en) * | 1998-05-13 | 2000-03-27 | Открытое акционерное общество "Северсталь" | Lengthwise rolling method and rolling stand for performing the same |
| RU2149718C1 (en) * | 1999-01-27 | 2000-05-27 | Открытое акционерное общество "Северсталь" | Rolling stand |
| RU2207925C2 (en) * | 2001-03-28 | 2003-07-10 | Открытое акционерное общество "Северсталь" | Method of rolling, stand of rolls and hold-down device of stands of rolls |
-
2001
- 2001-04-23 RU RU2001111160A patent/RU2187394C1/en active
- 2001-12-05 DE DE60142645T patent/DE60142645D1/en not_active Expired - Lifetime
- 2001-12-05 EP EP01274224A patent/EP1398089B1/en not_active Expired - Lifetime
- 2001-12-05 WO PCT/RU2001/000526 patent/WO2002090011A1/en not_active Ceased
- 2001-12-05 JP JP2002587131A patent/JP4111387B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| RU2187394C1 (en) | 2002-08-20 |
| EP1398089A4 (en) | 2005-08-10 |
| EP1398089B1 (en) | 2010-07-21 |
| WO2002090011A1 (en) | 2002-11-14 |
| JP4111387B2 (en) | 2008-07-02 |
| JP2004524166A (en) | 2004-08-12 |
| DE60142645D1 (en) | 2010-09-02 |
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