EP1398089B1 - Pressure device for rolling mill - Google Patents
Pressure device for rolling mill Download PDFInfo
- Publication number
- EP1398089B1 EP1398089B1 EP01274224A EP01274224A EP1398089B1 EP 1398089 B1 EP1398089 B1 EP 1398089B1 EP 01274224 A EP01274224 A EP 01274224A EP 01274224 A EP01274224 A EP 01274224A EP 1398089 B1 EP1398089 B1 EP 1398089B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- stand
- screwdown
- rolling mill
- chuck
- 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.)
- Expired - Lifetime
Links
- 238000005096 rolling process Methods 0.000 title claims description 15
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
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. 1 showing a general diagram of a screwdown mechanism.
- the screwdown mechanism comprises a spherical bearing 1 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)
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
RU 2138346, published 27.09.99 - 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. 1 showing a general diagram of a screwdown mechanism. - The screwdown mechanism comprises a
spherical bearing 1 supported by aframe 2 of a stand, arod 3 composed of a permanent magnet means (for example, the barium oxide one), a body 4 of a hydraulic cylinder, acoil 5 connected to a d.c.source 6, a hydraulic system 7, achuck 8, a coil 9 and acoil 10 both mounted in thechuck 8, acapacitor bank 11, acharging device 12, acontrol unit 13. Saidframe 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 intocoils 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, achuck 8 is repulsed from therod 3 with a force Pem and then P=Ph+Pem, thus reducing a thickness of strip; with a polarity N-S, thechuck 8 is attracted to therod 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 acapacitor 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)
- A rolling will stand with a screwdown mechanism, the rolling mill stand comprising a hydraulic cylinder disposed between a stand housing and a chuck (8) of a support roll, characterized in that the screwdown mechanism is made up of a rod (3) implemented from a permanent magnet means, say, the barium oxide one, which is embraced by an electromagnetic coil (5) connected with a direct current (d.c.) source, 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 direct current (d.c) source and the other is connected with a capacitor bank (11).
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 EP1398089A1 (en) | 2004-03-17 |
EP1398089A4 EP1398089A4 (en) | 2005-08-10 |
EP1398089B1 true 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 (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0641786U (en) * | 1992-11-17 | 1994-06-03 | 寛司 東 | Jigsaw puzzle |
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 WO PCT/RU2001/000526 patent/WO2002090011A1/en active Application Filing
- 2001-12-05 JP JP2002587131A patent/JP4111387B2/en not_active Expired - Fee Related
- 2001-12-05 EP EP01274224A patent/EP1398089B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
RU2187394C1 (en) | 2002-08-20 |
JP2004524166A (en) | 2004-08-12 |
EP1398089A1 (en) | 2004-03-17 |
WO2002090011A1 (en) | 2002-11-14 |
JP4111387B2 (en) | 2008-07-02 |
EP1398089A4 (en) | 2005-08-10 |
DE60142645D1 (en) | 2010-09-02 |
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