CN1984729B - Method and device for reducing vibrations in a steckel mill - Google Patents
Method and device for reducing vibrations in a steckel mill Download PDFInfo
- Publication number
- CN1984729B CN1984729B CN2005800230765A CN200580023076A CN1984729B CN 1984729 B CN1984729 B CN 1984729B CN 2005800230765 A CN2005800230765 A CN 2005800230765A CN 200580023076 A CN200580023076 A CN 200580023076A CN 1984729 B CN1984729 B CN 1984729B
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- CN
- China
- Prior art keywords
- roll
- rolling stock
- formula
- power
- described adjusting
- 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 - Fee Related
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Classifications
-
- 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
- B21B37/007—Control for preventing or reducing vibration, chatter or chatter marks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
- Manufacture Of Motors, Generators (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Vibration Prevention Devices (AREA)
- Crushing And Grinding (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention relates to a method and a corresponding device for reducing vibrations that are caused by a flat spot of a Steckel roll (1) in a Steckel mill. An adjustable roll (3) is mounted between the Steckel roll (1) of the Steckel furnace and the driver (2) of the roll stand (5) and can be contacted with the rolling stock (6). The invention is characterized in that the force which is exerted onto the rolling stock (6) by the roll (3) is adjusted to a defined value.
Description
Technical field
The present invention relates to a kind of be used for reducing in the Steckel mill because the method and the device of the vibration that the flat position (Flachstelle) on the Jill Sterkel roll causes, the adjusting roll that wherein engages with rolling stock is arranged between the driver of the Jill Sterkel roll of Jill Sterkel stove and roller cage.
Background technology
Can produce vibration in known manner in the Steckel mill, roll is columniform although reason is the Jill Sterkel formula, has the groove that is used for receiving rolling stock head (band head) along this Jill Sterkel formula roll.This groove is connected to by corresponding transition radius on the cylinder blanket of Jill Sterkel formula roll, makes that the circumference profile that twists in the rolling stock on the Jill Sterkel formula roll is not columniform, but has the flat position corresponding to the string shape.
Therefore, rolling stock roll or the unreel process in, in each case, the decline of band tensile force appears at the flat position place, this situation is corresponding to the elongation of the part of the rolling stock between Jill Sterkel formula roll and roller cage, perhaps occur the increase of band tensile force respectively, this situation is corresponding to the shortening of the part of the rolling stock between Jill Sterkel formula roll and roller cage.Under the situation that strap tension descends, the strap tension in this zone can become very low or even be zero.
A solution of this problem proposes in EP-A-1180402, and wherein movably the driver roll changes the haul distance of rolling stock, and it is especially as a kind of function of the anglec of rotation of Jill Sterkel formula roll.But, the position, angle of the flat position of Jill Sterkel formula roll that necessary here is be determine or its flat position determine, and also depend on the position that be offset roll dummy roll necessary position so also determine.
Summary of the invention
Therefore, an object of the present invention is to simplify the known method that is used to reduce vibration from the aspect of regulating.
This purpose is by realizing according to the method for claim 1 and device according to Claim 8.
Because the power that roll is applied on the rolling stock is adjusted to predetermined value, be that roll is with the predetermined rolling stock of defeating, guaranteed like this in turn-up process when arriving flat position, the decline of strap tension is weakened owing to the displacement of the relative band of roll, and the generation of this situation relies on the predetermined force that acts on the roll.
In this case, not influence is regulated in the transmission control of Jill Sterkel formula roll or strap tension, this operation without any with roll on the engaging of adjusting of power.In general, strap tension is regulated by the transmission of two work rolls of roller cage and the transmission of two Jill Sterkel formula rolls.For example, the rotary speed of Jill Sterkel formula roll obtains from rolling up speed and current coil diameter, and the torque of Jill Sterkel formula roll obtains from predetermined strap tension and coil diameter.
The skew of roll at the flat position place causes power to change for active how much.Trying hard to keep on the roll held identical, has only the application point of the power on the rolling stock to change.This means and depend on the offset direction that the predetermined force on the roll stands the slight variation of strap tension.
The error in length that can compensate rolling stock after the flat position process by the change (purpose is for constant from holding torque aspect the strap tension) of rotary speed is regulated in the transmission of Jill Sterkel formula roll, and therefore roll can be retracted initial position, in the upstream that this initial position roll has flat position.This situation is carried out automatically by the adjusting of existing Jill Sterkel formula roll.
In a kind of possible implementation of the present invention, in the one or many rotary course of Jill Sterkel formula roll, trying hard to keep, it is invariable to hold.
Therefore, if seldom band tensioning is at short notice arranged in the process that rolling stock is rolled, when subsequently band during through flat position, strap tension descends.Because the constant adjusting power on the roll is in dynamic balance with rolling stock up to roll on new position, this roll just is shifted.Because in locational slight vibration, the angle between two rolling stock parts of roll upstream and downstream reduces.Under the situation of constant force, adjusting device causes adjusting moment to reduce under the situation that strap tension descends, and causes adjusting moment to increase under the situation that strap tension increases.But what can realize is that strap tension can vanishing.In general, strap tension is chosen to be the function of the material behavior of rolling stock thickness (thickness of strip), temperature, thickness, width and rolling stock, because these belong to the part of common practise, no longer specifically discusses here.
In the possible scheme of another kind, in the concrete time range of each rotation, additional force is added on the constant force in the one or many rotary course of Jill Sterkel formula roll.This situation can realize in the following manner that promptly constant force increased, and was reduced to original steady state value once more after this time range in specific time range before strap tension descends appearance.Under any circumstance, the decline of strap tension can be compensated quickly than the situation that rotates through the constant force in the journey.The previous inertia that can compensate roll in this case better that is attached to of additional force.
The time range that is used to increase additional force corresponding to rolling stock by flat position unreel or duration of rolling about 1/3.In order to determine the increase of additional force, can determine the position, angle of Jill Sterkel formula roll or flat position.
And it is the function of the coil diameter of the rolling stock on the Jill Sterkel formula reel that the change masterpiece can be set.That is to say that for example this power keeps substantial constant and become along with the coil diameter that increases continuing to increase or reduce in the rotary course of Jill Sterkel formula roll.In the periodically additional embodiment of additional force, constant force similarly continues to increase, but additional force does not continue to increase.
On the given position of roll, the power on the roll and be applied to power on the roll and the winding of rolling stock is in balance by strap tension.Then, if coil diameter increases or reduces, the locus of the rolling stock between roll and the Jill Sterkel formula roll and dynamic balance therefore change, thereby in order to recover previous dynamic balance, the power on the roll or the locus of roll change.Necessity of power changes and can determine or calculate according to the parallelogram of force that the power on the roll (the adjusting power on strap tension and the roll) forms.
Therefore two kinds of possible schemes are arranged: a kind of is that power on the roll only depends on the strap tension on the particular point in time, therefore substantial constant (if periodicity additional force) in whole turn-up process except suitably applying, then, for example in turn-up process, lasting increase and roll are further deflected away from the path of rolling stock by continuous action because the increase of coil diameter, the strap tension on the roll become.Like this, except because the skew that the flat position of Jill Sterkel formula roll causes, the position of roll is variable, and the final position of the initial position of roll when roll up operation begins when roll up operation finishes moved continuously.
Another kind be on the roll power both as the function of strap tension also as the function of coil diameter and be determined in advance, this power can be selected as making it to keep and instantaneous strap tension balance then, and roll is only temporary transient its position that changes in the process of strap tension fluctuation, gets back to initial position once more then before the strap tension fluctuation.
Therefore the locus of roll whole roll or the unreel operating process in be maintained fixed, except because the skew that the flat position on the Jill Sterkel formula roll causes.
In general, selection power makes on the precalculated position of roll, and this power is offset by predetermined strap tension and is applied to power on the roll.But in first kind of situation of the change location of roll, determine necessary power based on geometrical condition (arrangement of rolling stock phase breaker roll), for example when the beginning of roll up operation based on the predetermined strap tension that produces by parallelogram of force.
In second kind of situation of the fixed position of roll, utilize parallelogram of force, the power on the roll is suitable for being changed by the increase of the coil diameter that acts on the strap tension on the roll under every kind of situation or geometrical condition that minimizing causes in the roll up operation process constantly.
Roll and/or its supporting, for example pivotal arm is hydraulically regulated, and has the following advantages like this, promptly regulates with pneumatic adjusting or by motor and compares, and can carry out sooner and more accurately.
Therefore move on the plane that is substantially perpendicular to the rolling stock between Jill Sterkel formula roll and driver owing to roll, can realize the possible effect of the maximum under the low skew of roll.But the adjusting of roll can take place by relative this plane of cylinder is regulated obliquely.
The device that is used to carry out this method can comprise the adjusting cylinder of at least one preferred hydraulic pressure, and this cylinder is bonded on the roll stand frame, for example pivotal arm.
This adjusting cylinder advantageously has the position detecting device that is used for determining in the roll up operation process starting position and monitoring roll location.
And this adjusting cylinder can have pressure-detecting device on bar side and piston side, and its advantage is to monitor actual pressure.
To a roll with low quality inertia be set, thereby can promptly compensate the band tension fluctuation according to roll of the present invention.Be in this purpose, the roll that is designed to pipe can be set.The wall thickness of pipe is about 1: 10 with the ratio of outer tube diameter, and it is sufficiently stable that this ratio can keep.
Regulate on the pivotal arm that cylinder engages if roll is installed in, then use hydraulic pressure to be proved to be favourable, the arm of force of regulating cylinder is pivoted relative to each other the axis of arm less than the distance between roll axis and the pivotal arm axis.Therefore, regulate cylinder and must only move, thereby can use adjusting cylinder with less valve and shorter conversion time with speed less than the speed of rolls.
Description of drawings
By following Fig. 1 to 3, the present invention is described with reference to example:
Fig. 1 is the schematic diagram of Steckel mill;
Fig. 2 show strap tension in turn-up process descend before and among the position of roll;
Fig. 3 show strap tension in the unreel process rise before and among the position of roll.
The specific embodiment
According to Fig. 1, additional adjusting roll 3 is arranged between the Jill Sterkel formula roll 1 of driver 2 and Jill Sterkel formula stove (coiler furnace), and this driver 2 is arranged on the upstream and downstream of roller cage 5.This roll is installed in the pivotal arm and with rolling stock 6 and engages.Driver 2 is opened with the fixed position of top driver roll at this time point.The thread groove 7 of Jill Sterkel formula roll 1 causes the flat position of the rolling stock of rolling 6.
Fig. 2 has shown the position b according to the lower left corner among device of the present invention and the figure before strap tension descends that the position in the upper left corner among the figure a) is caused by flat position) cause by flat position among strap tension descends according to device of the present invention.Jill Sterkel formula roll 1 by shown in arrow be rotated counterclockwise and roll rolling stock 6 around rotation.Roll 3 is installed in the two ends of pivotal arm 4, and hydraulic cylinder regulator 8 all is bonded on the pivotal arm 4 in each case.Two pivotal arms 4 are connected to each other in pivot axis 9 pivots and the zone the latter.The strap tension of effect is by vector 10 expressions.The strap tension that acts on the roll 3 obtains from parallelogram of force, and this parallelogram of force illustrates in the bottom of figure, and wherein power 11 is reverse with strap tension 10, but equal and opposite in direction, regulating cylinder 8 at this time point must be applied to this power on the roll.
At position b), strap tension reduces.In order to absorb the decline of strap tension, roll 3 is lowered by regulating cylinder 8.Because the geometry of adjusting device is regulated moment and is reduced under the situation of constant cylinder power.
Two positions a) and b) illustrate up and down, the lower right corner of Fig. 2 only shows rolling stock and roll and pivotal arm in a simplified manner.Arrow 12 shows the moving direction of roll 3 in the process of the flat position of walking around Jill Sterkel formula roll 1.
The transmission governing response of Jill Sterkel formula roll 1 descends in the strap tension that increases owing to velocity of rotation, and roll 3 was pulled zero position before strap tension descends.This has guaranteed that in turn-up process by always turning back to the initial position of roll before, the power that presupposes on the roll 3 is suitable for instantaneous strap tension (as the function of coil diameter) to roll 3 in flat position.Perhaps continue to rise to the higher position from lower position according to constant force (variable position of the roll) roll of regulating cylinder 8.
In turn-up process, because the flat position on the Jill Sterkel formula roll 1, the elongation of rolling stock 6 and strap tension therefore descend and occur.Roll 3 reduces by rolling stock 6.
The geometry of the connection of hydraulic cylinder regulator 8 is chosen to be and makes the be pivoted relative to each other arm of force of center of gravity of arm 4 of the power of cylinder reduce, and therefore, although pivotal arm 4 skews, strap tension reduces slightly.The torque adjustment of Jill Sterkel formula roll 1 reduces in response to this by the increase of rotary speed, up to the strap tension recovery of expectation.Therefore roll 3 returned its position before strap tension reduces.
Fig. 3 is to be similar to the mode of Fig. 2, the position in the upper left corner illustrated in a) strap tension that causes by flat position before rising according to device of the present invention, at the position in lower left corner b) in illustrated the strap tension that causes by flat position among rising according to device of the present invention.
In the unreel process, because the flat position on the Jill Sterkel formula roll 1, the shortening of rolling stock 6 and strap tension therefore rise and occur.Roll 3 rises by rolling stock 6.
The geometry of the connection of hydraulic cylinder regulator is chosen to be and makes the be pivoted relative to each other arm of force of center of gravity of arm 4 of the power of cylinder increase, and therefore, although pivotal arm 4 skews, strap tension increases slightly.The torque adjustment of Jill Sterkel formula roll 1, is recovered up to the strap tension of expecting in response to this increase by reducing of rotary speed.Therefore roll 3 returned its position before strap tension increases.
Guaranteed like this that in the unreel process roll 3 is got back to the initial position of roll before by flat position, the power that presupposes on the roll 3 is suitable for instantaneous strap tension.Perhaps continue to advance to lower position from the higher position according to constant force (variable position of the roll) roll of regulating cylinder 8.
Another Jill Sterkel formula roll adjusting on the opposite side of roller cage is carried out in a similar fashion, in each case, Jill Sterkel formula roll is another unwinding around rising, except first and last situation about passing through under every kind of situation only using a Jill Sterkel formula roll.
Reference numeral:
1. Jill Sterkel formula roll
2. driver
3. roll
4. pivotal arm
5. roller cage
6. rolling stock
7. thread groove
8. adjusting cylinder
9. pivot axis
10. strap tension
11. the power on the roll
12. roll moving direction
Claims (15)
1. one kind is used for reducing because the method for the vibration that the flat position on the Jill Sterkel formula roll (1) of Steckel mill causes, the adjusting roll (3) that engages with rolling stock (6) is arranged between the driver (2) of the Jill Sterkel formula roll (1) of Jill Sterkel formula stove and roller cage (5), it is characterized in that the power that described adjusting roll (3) is applied on the rolling stock (6) is adjusted to a predetermined value.
2. the method for claim 1 is characterized in that, it is constant that described power keeps in the one or many rotary course of described Jill Sterkel formula roll (1).
3. method as claimed in claim 2 is characterized in that, additional force appends in the constant force in the one or many rotary course of described Jill Sterkel formula roll (1) in the special time scope of each rotation.
4. the method for claim 1 is characterized in that, described masterpiece is that the function of the coil diameter of the rolling stock (6) on the Jill Sterkel formula roll (1) changes.
5. as each described method in the claim 1 to 3, it is characterized in that, described adjusting roll (3) is applied to described power on the rolling stock (6) and is chosen to be and makes on the precalculated position of described adjusting roll, and this adjusting roll (3) is applied to this power on the rolling stock (6) and offsets by predetermined strap tension and be applied to power on the described adjusting roll.
6. as each described method in the claim 1 to 3, it is characterized in that described adjusting roll (3) and/or its have the frame of pivotal arm (4) form hydraulically to be regulated.
7. as each described method in the claim 1 to 3, it is characterized in that described adjusting roll (3) is substantially perpendicular to the plane that is positioned at the rolling stock (6) between Jill Sterkel formula roll (1) and the driver (2) and moves.
8. one kind is used for the device that enforcement of rights requires 1 to 7 each described method, comprise the adjusting roll (3) between the driver (2) that is arranged on Jill Sterkel formula roll (1) and roller cage (5) at least, make described adjusting roll to engage with rolling stock (6), it is characterized in that, be provided with and make described adjusting roll (3) be applied to the device (4,8) that power on the rolling stock (6) can be adjusted to a predetermined value.
9. device as claimed in claim 8, it is characterized in that, describedly make described adjusting roll be applied to the adjusting cylinder (8) that device that power on the rolling stock can be adjusted to a predetermined value comprises a hydraulic pressure, this adjusting cylinder (8) is bonded on the frame with pivotal arm (4) form of described adjusting roll (3).
10. device as claimed in claim 9 is characterized in that, described adjusting cylinder (8) has position detecting device.
11., it is characterized in that described adjusting cylinder (8) all has pressure-detecting device as claim 9 or 10 described devices on bar side and piston side.
12., it is characterized in that described adjusting roll (3) can be substantially perpendicular to the plane that is positioned at the rolling stock (6) between Jill Sterkel formula roll (1) and the driver (2) and move as each described device in the claim 8 to 10.
13., it is characterized in that described adjusting Roller Design is pipe as each described device in the claim 8 to 10.
14. as claim 9 or 10 described devices, it is characterized in that, described adjusting roll (3) joint mounted thereto has on the pivotal arm (4) of adjusting cylinder (8), and this adjusting cylinder (8) is pivoted relative to each other the arm of force of axis (9) of arm less than the distance between roll axis and the pivotal arm axis.
15. device as claimed in claim 8, it is characterized in that, describedly make described adjusting roll be applied to the device (4 that power on the rolling stock can be adjusted to a predetermined value, 8) be arranged so that regulating moment under the situation that the band tensile force descends reduces, should regulate moment under the situation that the band tensile force rises increases.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0114404A AT502723B1 (en) | 2004-07-07 | 2004-07-07 | METHOD AND DEVICE FOR REDUCING VIBRATIONS IN A SLIDING ROLLER |
| ATA1144/2004 | 2004-07-07 | ||
| PCT/EP2005/006561 WO2006002783A1 (en) | 2004-07-07 | 2005-06-17 | Method and device for reducing vibrations in a steckel mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1984729A CN1984729A (en) | 2007-06-20 |
| CN1984729B true CN1984729B (en) | 2010-06-16 |
Family
ID=34970395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800230765A Expired - Fee Related CN1984729B (en) | 2004-07-07 | 2005-06-17 | Method and device for reducing vibrations in a steckel mill |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1763410B1 (en) |
| JP (2) | JP2008504969A (en) |
| CN (1) | CN1984729B (en) |
| AT (2) | AT502723B1 (en) |
| BR (1) | BRPI0513148A (en) |
| CA (1) | CA2572986A1 (en) |
| DE (1) | DE502005006011D1 (en) |
| PL (1) | PL1763410T3 (en) |
| WO (1) | WO2006002783A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007005378A1 (en) | 2007-02-02 | 2008-08-07 | Siemens Ag | Operating method for a reel device for winding or unwinding a tape and control device and reel device for this purpose |
| AT506398B1 (en) | 2008-06-18 | 2009-09-15 | Siemens Vai Metals Tech Gmbh | METHOD AND DEVICE FOR SUPPRESSING VIBRATIONS IN A ROLLING SYSTEM |
| CN104226727A (en) * | 2014-09-26 | 2014-12-24 | 武汉钢铁(集团)公司 | Control method of coefficient-variable uncoiler |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1344594A (en) * | 2001-08-20 | 2002-04-17 | 燕山大学 | Composite roll system with controllable small opening for rolling mill |
| US20020046588A1 (en) * | 2000-08-17 | 2002-04-25 | Michael Clark | Apparatus for reducing tension variations in a metal strip |
| DE10357272A1 (en) * | 2002-12-14 | 2004-06-24 | Sms Demag Ag | Process for hot rolling steel strips comprises cropping the strip using reverse rolling in a Steckel mill using crop shears arranged between a driver and the mill |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60231516A (en) * | 1984-04-28 | 1985-11-18 | Sumitomo Metal Ind Ltd | Coiler having looper mechanism |
| JPS6333116A (en) * | 1986-07-25 | 1988-02-12 | Hitachi Ltd | Furnace coiler winding control method |
| JPH10180327A (en) * | 1996-12-20 | 1998-07-07 | Nisshin Steel Co Ltd | Tension control method for chip end and tail end of strip in steckel mill |
| DE19818207C2 (en) * | 1998-04-23 | 2000-05-31 | Schloemann Siemag Ag | Steckel hot rolling mill |
| DE10133756A1 (en) * | 2001-07-11 | 2003-01-30 | Sms Demag Ag | Cold rolling mill and method for cold rolling metallic strip |
| AU2003293825A1 (en) * | 2002-12-14 | 2004-07-09 | Sms Demag Aktiengesellschaft | Method and installation for hot-rolling strips using a steckel rolling frame |
-
2004
- 2004-07-07 AT AT0114404A patent/AT502723B1/en not_active IP Right Cessation
-
2005
- 2005-06-17 AT AT05752303T patent/ATE414574T1/en not_active IP Right Cessation
- 2005-06-17 WO PCT/EP2005/006561 patent/WO2006002783A1/en active Application Filing
- 2005-06-17 EP EP05752303A patent/EP1763410B1/en not_active Revoked
- 2005-06-17 CA CA002572986A patent/CA2572986A1/en not_active Abandoned
- 2005-06-17 PL PL05752303T patent/PL1763410T3/en unknown
- 2005-06-17 CN CN2005800230765A patent/CN1984729B/en not_active Expired - Fee Related
- 2005-06-17 DE DE502005006011T patent/DE502005006011D1/en active Active
- 2005-06-17 JP JP2007519652A patent/JP2008504969A/en not_active Ceased
- 2005-06-17 BR BRPI0513148-0A patent/BRPI0513148A/en not_active IP Right Cessation
-
2012
- 2012-03-22 JP JP2012065725A patent/JP2012110969A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020046588A1 (en) * | 2000-08-17 | 2002-04-25 | Michael Clark | Apparatus for reducing tension variations in a metal strip |
| CN1344594A (en) * | 2001-08-20 | 2002-04-17 | 燕山大学 | Composite roll system with controllable small opening for rolling mill |
| DE10357272A1 (en) * | 2002-12-14 | 2004-06-24 | Sms Demag Ag | Process for hot rolling steel strips comprises cropping the strip using reverse rolling in a Steckel mill using crop shears arranged between a driver and the mill |
Non-Patent Citations (1)
| Title |
|---|
| JP昭63-33116A 1988.02.12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012110969A (en) | 2012-06-14 |
| BRPI0513148A (en) | 2008-04-29 |
| EP1763410B1 (en) | 2008-11-19 |
| WO2006002783A1 (en) | 2006-01-12 |
| PL1763410T3 (en) | 2009-04-30 |
| JP2008504969A (en) | 2008-02-21 |
| CA2572986A1 (en) | 2006-01-12 |
| AT502723B1 (en) | 2008-08-15 |
| EP1763410A1 (en) | 2007-03-21 |
| ATE414574T1 (en) | 2008-12-15 |
| AT502723A1 (en) | 2007-05-15 |
| DE502005006011D1 (en) | 2009-01-02 |
| CN1984729A (en) | 2007-06-20 |
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Granted publication date: 20100616 Termination date: 20130617 |