EP1425116A1 - Rolling stand for the production of rolled strip - Google Patents
Rolling stand for the production of rolled stripInfo
- Publication number
- EP1425116A1 EP1425116A1 EP02776955A EP02776955A EP1425116A1 EP 1425116 A1 EP1425116 A1 EP 1425116A1 EP 02776955 A EP02776955 A EP 02776955A EP 02776955 A EP02776955 A EP 02776955A EP 1425116 A1 EP1425116 A1 EP 1425116A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contour
- rolls
- bale
- roll
- roller
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
- B21B13/142—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls by axially shifting the rolls, e.g. rolls with tapered ends or with a curved contour for continuously-variable crown CVC
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/40—Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
Definitions
- the invention relates to a roll stand for the production of rolled strip with work rolls, which are optionally supported on support rolls or support rolls and intermediate rolls, the work rolls and / or support rolls and / or intermediate rolls being arranged axially displaceably relative to one another in the roll stand and each roll of at least one of these roll pairs over has the entire effective bale length, curved contour and these two bale contours complement each other only in a certain relative axial position of the rollers of the roller pair in the unloaded state.
- a roll stand of the generic type is already known from EP-B 0 049 798, in which the shape of the roll gap and thus the surface contour of the rolled strip is influenced exclusively by the axial displacement of the rolls designed with curved contours.
- the two interacting rollers of a pair of rollers have an identical shape, are installed rotated through 180 ° and complement each other in a certain axial displacement position.
- This special roller grinding makes it possible to compensate for the parabolic roller bend deflection that is dependent on the respective load conditions, so that there is no longer a need to change the roller when the load conditions change significantly, which is quite common with rollers with parabolic roller bale grinding.
- the roll barrel contours which are complementary complementary rolls in an axial displacement position, are formed by a 5th order curve, the respective curves on the rolls are designed in such a way that they have a maximum and a minimum of the slope of the curves in the neutral roller position in the longitudinal areas on both sides of the center.
- the object of the present invention is to provide a further advantageous solution for a roll stand, in which the shape of the roll gap, i.
- the course of the thickness of the roll gap over the active roll length can be varied in such a way that a flat and undulated strip that meets the highest quality standards is achieved.
- the roll gap contour follows the general equation with s displacement of the upper roller from the center position G 0
- the contour coefficient A is determined here by the axial displacement range and the corresponding equivalent roller crowns in the extreme positions of the rollers.
- Equivalent crowning is understood here to mean the crowning of conventional, cosine-shaped ground rolls, which together generate exactly the same empty roll gap profile.
- the current roll contour and thus the course of the roll gap can be influenced without changing the equivalent crowning of the rolls.
- the positive effect with regard to avoiding quarter wave formation arises because an increase in the contour angle leads to a reduction in the roll barrel diameter in the area between the roll edge and the middle of the roll, which ultimately results in less roll deformation in this area, which is critical for quarter wave formation.
- the tilting coefficient (B) thus smoothes the contour of the roll barrel and the distribution of forces.
- the introduction of a tilt coefficient into the contour equation of the roll bales thus has a favorable influence on the loads on the rolls and bearings of the roll stand, but does not show any fundamental influence on the roll gap geometry, as the comparison of the two roll gap equations using a sine function and a tilted sine function for the roll bale contour shows.
- a contour angle ( ⁇ ) is selected for the curved bale contour of the roller in accordance with the condition 0 ° ⁇ ⁇ 180 °, preferably 50 ° ⁇ ⁇ 8Q ° , This ensures that, depending on the selected direction of displacement, the roll gap continuously increases or decreases starting from a central maximum or minimum value towards the roll edges.
- a contour angle ⁇ > 180 ° there is a reversal in the constant decrease or increase in the roll gap in the edge region of the grinding reference length and thus undesirable influences on the quality of the Rolled strip.
- the axial forces to be derived into the roller support bearings are minimized if the tilting coefficient (B) in the equation for the bale contour of each roller is selected so that the maximum difference in diameter of the bale contours within the grinding reference length or the bale length is a minimum.
- An influencing of the rolls which improves the strip quality can be achieved if additional actuators, at least in sections influencing the bale contour, are positioned in operative connection with the work rolls and / or backup rolls and / or intermediate rolls, such as work roll cooling or zone cooling, in the roll stand.
- additional actuators at least in sections influencing the bale contour
- Corresponding effects can also be achieved by roller bending devices or heating devices which can be activated in zones.
- the roll stand is integrated into a profile or flatness control loop.
- the work rolls and / or back-up rolls and / or intermediate rolls are connected to a control device for profile or flatness control by means of the shifting devices assigned to them, as well as any necessary measuring devices for detecting the state of the incoming or outgoing strip and possibly additional actuators
- the control device is assigned a computing unit that generates control signals for tracking the work rolls and / or back-up rolls and / or intermediate rolls and possibly additional actuators using mathematical models, possibly using a neural network, and with the work rolls and / or back-up rolls and / or intermediate rollers and, if appropriate, additional actuators assigned to actuators, positions corresponding to the control signals can be approached.
- the measuring devices collect strip-specific data, such as profile profile, tension conditions, temperature profiles and rolling forces.
- 1 is a schematic representation of a duo roll stand with work rolls according to the invention
- 2 is a schematic representation of a four-high mill stand with backup rolls according to the invention
- FIG. 3 shows a schematic representation of a six-high rolling stand with intermediate rolls according to the invention
- Fig. 8 shows the roll gap contour depending on the roll displacement s
- FIG. 1 to 3 schematically show various types of roll stands which are suitable for the application of the invention and whose basic structure is known from the prior art, for example EP-B 0 049 798.
- Fig. 1 shows a duo roll stand 1 with stand 2 and a pair of work rolls 3, 4, which are rotatably supported in chocks 5, 6 in the two stand 2. Adjusting devices 7 enable the two work rolls 3, 4 to be set against the rolling strip 9 running through the roll gap 8.
- the two work rolls 3, 4 are axial via the roll journals 10, 11 in the chocks 5, 6, which also include displacement devices 12, 13 slidably supported.
- the roll bales 1 of both work rolls 3, 4 are equipped with a curved bale contour 15 over their entire effective bale length, these bale contours 15 complementing each other complementarily in a certain relative axial position of the work rolls in the unloaded state. This is possible either inside or outside the axial displacement range of the work rolls 3, 4.
- FIGS. 2 and 3 shows a further schematic representation of a four-high roll stand 17 with work rolls 3, 4 and support rolls 18, 19.
- the support rolls 18, 19 are equipped with a curved bale contour 15 and are axially displaceably supported.
- 3 shows a six-high roll stand 20 with work rolls 3, 4, Back-up rolls 18, 19 and intermediate rolls 21, 22.
- the intermediate rolls 21, 22 are equipped with a curved bale contour 15 and are supported axially displaceably. While the bale contour acts directly on the rolled strip in the duo mill stand, in the roll stands according to FIGS. 2 and 3 there is a change in the roll gap contour generated by the essentially cylindrical work rolls due to the action of the support provided with a curved bale contour. or intermediate rolls.
- FIG. 4 shows the curved contour profile on the roll barrel of the upper and lower work rolls of a duo roll stand on the basis of a sine function with a roll barrel length of 1540 mm and a contour angle of 72 °. With a work roll shift of approximately ⁇ 60 mm, there are already striking differences in diameter over the bale length.
- FIG. 5 shows the curved contour profile on the roll barrel on the basis of a tilted sine function. The differences in diameter across the length of the roll are much smaller here and illustrate the smoothing effect described. Tests have shown that roller bales contoured in this way can produce a flat and shaft-free rolled strip that meets the highest quality requirements.
- the input variables are the grinding reference length or the bale length, the displacement range, the equivalent roller crowns in the extreme displacement positions and the contour angle.
- Fig. 6 the example of a contour angle of 70 ° illustrates the importance of this variable for a certain standardized roll gap profile.
- the contour angle defines that section of the cosine curve that corresponds to half the grinding reference length on the bale.
- the contour of the bale can be influenced by varying the angle of the contour.
- the choice of a larger contour angle leads to a smaller diameter of the roll barrel in an area between the middle of the roll and the edge of the roll, so that in this area one lower local degree of reduction in the rolled strip thickness and ultimately to a minimization of quarter wave formation.
- the influence of the contour angle on the empty roll gap contour is shown in FIG. 7 and clearly shows the diameter variation in the quarter range.
- the roll gap contour In order to be able to use the rolls equipped with the bale contour described for dynamic flatness control, the roll gap contour must be determined by the shift position of the rolls relative to one another and must be continuously variable over the shift range. These relationships are shown in FIG. 8 for three exemplary values of the roll displacements of the upper roll (s) of -60 mm, 0 mm (no displacement) and +60 mm and show the effective range of the roll stand that can be used.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0143301A AT410765B (en) | 2001-09-12 | 2001-09-12 | Roll stand for the production of rolled strip |
AT14332001 | 2001-09-12 | ||
PCT/EP2002/009764 WO2003022470A1 (en) | 2001-09-12 | 2002-09-02 | Rolling stand for the production of rolled strip |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1425116A1 true EP1425116A1 (en) | 2004-06-09 |
EP1425116B1 EP1425116B1 (en) | 2015-10-28 |
Family
ID=3688230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02776955.3A Expired - Lifetime EP1425116B1 (en) | 2001-09-12 | 2002-09-02 | Rolling stand for the production of rolled strip |
Country Status (7)
Country | Link |
---|---|
US (1) | US7316146B2 (en) |
EP (1) | EP1425116B1 (en) |
CN (1) | CN1555297A (en) |
AT (1) | AT410765B (en) |
BR (1) | BR0212498B1 (en) |
RU (1) | RU2300432C2 (en) |
WO (1) | WO2003022470A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10039035A1 (en) * | 2000-08-10 | 2002-02-21 | Sms Demag Ag | Roll stand with a pair of CVC rolls |
DE10218234A1 (en) * | 2002-04-24 | 2003-11-06 | Sms Demag Ag | Rolling device with a number of work rolls arranged in a roll stand |
AU2003903501A0 (en) * | 2003-07-07 | 2003-07-24 | Commonwealth Scientific And Industrial Research Organisation | A method of forming a reflective authentication device |
DE102004020132A1 (en) * | 2003-12-23 | 2005-07-28 | Sms Demag Ag | Method for rolling of sheets or strips in a roll stand including working rolls,intermediate rolls, and backing rolls useful for rolling sheets or strips in roll stands using working rolls supported on backing or intermediate rolls |
CN100333845C (en) * | 2004-08-30 | 2007-08-29 | 宝山钢铁股份有限公司 | Method for designing roller shape and milling roller for inhibiting higher-order wave shape |
WO2007144161A1 (en) * | 2006-06-14 | 2007-12-21 | Siemens Vai Metals Technologies Gmbh & Co | Rolling stand for producing rolled strip or sheet |
DE102006051728B4 (en) | 2006-10-30 | 2013-11-21 | Outokumpu Nirosta Gmbh | Method for rolling metal strips, in particular steel strips |
DE102009030792A1 (en) * | 2008-12-18 | 2010-06-24 | Sms Siemag Ag | Method for calibrating two cooperating work rolls in a rolling stand |
AT509107B1 (en) * | 2009-12-10 | 2011-09-15 | Siemens Vai Metals Tech Gmbh | ROLLING MILL FOR THE PRODUCTION OF ROLLING BAND |
DE102012212532B4 (en) | 2012-07-18 | 2016-12-15 | Achenbach Buschhütten GmbH & Co. KG | Roll stand with contoured rolls |
EP3124130A1 (en) | 2015-07-28 | 2017-02-01 | Primetals Technologies Austria GmbH | Roller grinder for targeted prevention of quarter waves |
EP3819035A1 (en) * | 2019-11-08 | 2021-05-12 | Primetals Technologies Limited | Method of controlling a roll gap in a rolling mill |
RU2758397C1 (en) * | 2020-10-08 | 2021-10-28 | Анатолий Васильевич Алдунин | Double four-high sheet rolling stand |
CN115139440B (en) * | 2022-09-06 | 2022-12-02 | 启东凯顺机械制造有限公司 | Parameter optimization control method for calender |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS517635B2 (en) * | 1971-12-10 | 1976-03-09 | ||
DE3038865C1 (en) | 1980-10-15 | 1982-12-23 | SMS Schloemann-Siemag AG, 4000 Düsseldorf | Roll stand with axially movable rolls |
US4519233A (en) * | 1980-10-15 | 1985-05-28 | Sms Schloemann-Siemag Ag | Roll stand with noncylindrical rolls |
DE3213496A1 (en) * | 1982-04-10 | 1983-10-20 | SMS Schloemann-Siemag AG, 4000 Düsseldorf | ROLLING MILLS WITH AXIAL SLIDING ROLLS |
DE3602698A1 (en) * | 1985-04-16 | 1986-10-16 | SMS Schloemann-Siemag AG, 4000 Düsseldorf | ROLLING MILLS WITH AXIAL SLIDING ROLLS |
DE3620197A1 (en) * | 1986-06-16 | 1987-12-17 | Schloemann Siemag Ag | ROLLING MILL FOR PRODUCING A ROLLING GOOD, ESPECIALLY A ROLLING STRIP |
DE3712043C2 (en) | 1987-04-09 | 1995-04-13 | Schloemann Siemag Ag | Roll stand with axially displaceable rolls |
DE69009102T3 (en) | 1989-06-05 | 2001-02-08 | Kawasaki Steel Co | Multi-roll stand. |
US5218852A (en) * | 1989-06-05 | 1993-06-15 | Kawasaki Steel Corporation | Multi-roll cluster rolling apparatus |
US5622073A (en) * | 1991-05-16 | 1997-04-22 | Kawasaki Steel Corporation | Six high rolling mill |
-
2001
- 2001-09-12 AT AT0143301A patent/AT410765B/en not_active IP Right Cessation
-
2002
- 2002-09-02 RU RU2004110929/02A patent/RU2300432C2/en active
- 2002-09-02 EP EP02776955.3A patent/EP1425116B1/en not_active Expired - Lifetime
- 2002-09-02 BR BRPI0212498-0A patent/BR0212498B1/en not_active IP Right Cessation
- 2002-09-02 CN CNA028179536A patent/CN1555297A/en active Pending
- 2002-09-02 WO PCT/EP2002/009764 patent/WO2003022470A1/en not_active Application Discontinuation
- 2002-09-02 US US10/489,593 patent/US7316146B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO03022470A1 * |
Also Published As
Publication number | Publication date |
---|---|
BR0212498B1 (en) | 2010-06-15 |
WO2003022470A1 (en) | 2003-03-20 |
US20050034501A1 (en) | 2005-02-17 |
EP1425116B1 (en) | 2015-10-28 |
ATA14332001A (en) | 2002-12-15 |
AT410765B (en) | 2003-07-25 |
BR0212498A (en) | 2004-08-24 |
RU2300432C2 (en) | 2007-06-10 |
RU2004110929A (en) | 2005-06-10 |
US7316146B2 (en) | 2008-01-08 |
CN1555297A (en) | 2004-12-15 |
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