EP2830788A1 - Verfahren zum walzen eines materialbandes - Google Patents
Verfahren zum walzen eines materialbandesInfo
- Publication number
- EP2830788A1 EP2830788A1 EP13713773.3A EP13713773A EP2830788A1 EP 2830788 A1 EP2830788 A1 EP 2830788A1 EP 13713773 A EP13713773 A EP 13713773A EP 2830788 A1 EP2830788 A1 EP 2830788A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- width
- band
- material strip
- rolling
- 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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
-
- 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
- B21B37/48—Tension control; Compression control
- B21B37/50—Tension control; Compression control by looper control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/06—Width
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/02—Tension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/12—Rolling load or rolling pressure; roll force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/04—Roll speed
Definitions
- the invention relates to a method for rolling a material strip by means of a plurality of rolling mills arranged one behind the other and loop lifters arranged between the rolling mills.
- material strips are rolled in rolling mills by means of rolling mills arranged one behind the other and loop lifters arranged between the rolling mills.
- the loop lifter By means of the loop lifter the strip of material is thereby lifted, respectively Zvi ⁇ rule two roll stands, so that generated in the material strip tape trains that reduce the width of the Materialban ⁇ .
- the ends of the material strip occurs because ⁇ with a stepped width reduction, because of band portions at the ends of the material strip by the loop lifter can be exerted no or only a reduced tape tension, the tape tension a width reduction in the nips of
- JP 4 100620 A discloses a method for influencing the
- Width of a metallic material strip in a rolling train in which a strip tension is controlled in the material strip in front of an input ⁇ rolling stand.
- the invention is based on the object, an improved
- width differences between the belt end and adjacent portions of the tape strip tensions are reduced by a corresponding change in the band ⁇ end portions.
- advantageously counteracted a stepped reduction width in the end regions of the strip of material and thus a more uniform width offset ⁇ distribution along the material strip (more precisely, a much more uniform distribution ge width in a larger area of the material strip) can be achieved.
- the method is particularly advantageous for use in rolling mills which do not have suitable compression devices by means of which the stepped width reduction in the end regions of the material strip can be compensated. Such rolling mills are mainly found in older hot rolling mills.
- a thickness of the band end and / or a temperature of Bandendab ⁇ section and / or a width of the material strip are preferably used as influencing variables.
- the consideration of such influencing variables advantageously makes possible a more precise width correction which can be adapted to the respective conditions in the band end sections of the material band.
- the strip tension is set in at least one band end section on the basis of a band model which describes a dependence of a change in width of the material band of a Bandzug baseung.
- the width of the material band in the band end sections can be corrected in a controlled manner using the band model.
- the method can be advantageous by
- a Bandzugitze ⁇ tion is preferably determined by means of the belt model corresponding to a determined width difference difference and the generated strip tension is changed by a Bandzugregelung the respective Schiingenhebers the determined Bandzug selectedung.
- the band hoops are advantageously adjusted in such a way that they at least partially compensate the ascertained differences in width, since they cause band tension changes which compensate for these differences in width.
- a current position ei ⁇ nes band end is determined continuously by continuously instantaneous Ge ⁇ speeds and forces of all rolling mill stands and momenta- ne positions of all ski lifters are recorded and evaluated.
- FIG. 1 shows schematically a rolling train of a hot rolling mill with seven stands arranged one behind the other
- Width of the material strip in a rolling process according to the prior art
- Width of the material strip in a rolling process according to the prior art
- Width of the material strip in an inventive rolling ⁇ method Width of the material strip in an inventive rolling ⁇ method
- FIG. 6 shows a flowchart of the method according to the invention.
- Figure 1 shows schematically a rolling mill 1 of a hot rolling mill with seven rolling stands 2.1 to 2.7 arranged one behind the other, wherein in interframe areas 9.1 to 9.6 between each two adjacent rolling stands 2.1 to 2.7 per a sling 3.1 to 3.6 is arranged.
- a material strip 4 is processed, which is transported by the rolling stands 2.1 to 2.7 (from left to right in FIG. 1) and thereby changed by rolling in its width, thickness and length.
- 4.1 designates a tape head of the material strip 4, ie the one end of the material strip 4, which is first moved into the rolling train 1.
- 4.2 designates a belt foot of the material strip 4, ie the one end of the material strip 4, which is last driven into the rolling train 1.
- Each rolling stand 2.1 to 2.7 has two superimposed angeord ⁇ designated work rolls 5, which are separated by a nip 6, through which the material strip 4 is guided.
- Each ski lifter 3.1 to 3.6 has a lifting roller 7, which is rotatably mounted about a roller axis and is secured to a pivotable lifting arm 8. By pivoting the lifting arm 8, the lifting roller 7 can be pressed against an underside of the material strip 4, so that a band portion of the material strip 4 in the intermediate frame region 9.1 to 9.6, in which the ski jacks 3.1 to 3.6 is arranged, is raised and thereby in the band section Bandzug ol to o6 is generated.
- the ski jacks 3.1 to 3.6 of the illustrated embodiment ⁇ example are thus formed as a rotary ski lifts 3.1 to 3.6.
- the specific design ⁇ From the loop lifter is 3.1 to 3.6 but insignificantly loaned, ie, the inventive method can be applied analogously for translationally formed loop lifter 3.1 to 3.6.
- the inventive method is for example so ⁇ well applicable for electrically driven and for hydraulically driven loop lifter 3.1 to 3.6.
- FIG. 2 shows the effect of the loop lifter 3.i on a strip section extending between the roll nips 6 of the rolling stands 2.i and 2.i + 1.
- the lifter arm 8 of the loop lifter 3.i is pivoted upward by a pivoting angle ⁇ from the horizontal, so that the lifting roller 7 of the loop lifter 3.i raises the band section.
- the pivoting position of the lifting arm 8 defined by the pivot angle ⁇ is referred to here as the position of the loop lifter 3.i.
- the loop lifter 3.i generates a strip tension oi in the strip section, which has a width biO which the strip section has before entering the roll stand 2.i, in the roll gap 6 of the roll stand 2.i via a strip tension control (also called torque control) a width bi and in the nip 6 of the rolling mill 2.i + l reduced to a width bi + 1.
- a strip tension control also called torque control
- the section length of the strip section between the roll nips 6 of the rolling stands 2.i and 2.i + l will be in the following
- Swing angle ⁇ is a measure of the so-called tape supply in the intermediate frame 9.i. Under this tape supply here is the difference between the section length
- FIG. 3 shows the influence of a strip tension ol produced by the first loop lifter 3.1 on the width of the material strip 4 in a rolling process according to the prior art.
- a belt coordinate locations on the parameterized s Mate ⁇ rialband 4 by their current distance from the tape head 4.1 along the material band 4, wherein the tape head 4.1 has the band coordinate s 0.
- the first diagram in FIG. 3 shows the strip tension ol in the material strip 4 at a position of the rolling train 1 in the first intermediate frame region 9.1.
- the first loop lifter is 3.1 (more precisely, the He- berrolle 7 of the first sling lifter 3.1) only driven to the Mate ⁇ rialband 4, after the second rolling stand is 2.2 be ⁇ overloaded, that is, after the tape head 4.1 and an adjoining tape section of length sl have passed the nip 6 of the second rolling stand 2.2. Therefore, the strip tension ol acts only from a belt coordinate sl one of the materials ⁇ tied fourth
- the second diagram of Figure 3 shows the width of the bO Mate ⁇ rialbandes 4 at a position before the first roll stand 2.1 depending on the belt coordinate s.
- a material strip 4 is considered whose width and thickness before rolling in the rolling train 1 along the Ma ⁇ terialbandes 4 are constant. Therefore, the width Bo is con stant ⁇ along the material strip 4.
- the third diagram of figure 3 shows the width bl (ol) of the material strip 4 in the nip 6 of the first roll stand 2.1 depending on the belt coordinate s.
- the strip tension ol acts on the Materi ⁇ alband 4 in the nip 6 of the first rolling stand 2.1 only after the front band portion of the length has s2 passes this roll ⁇ gap 6, and is lowered until the first loop lifter 3.1 when running-out of the material strip. 4 Therefore, the width bl (ol) is reduced by the band tension ol only from the band coordinate s2 and up to the band coordinate s6.
- the fourth diagram of FIG. 3 shows a width b2 (ol) of the material strip 4 in the roll gap 6 of the second roll stand 2.2 as a function of the strip coordinate s, resulting solely from the strip tension ol.
- This width b2 (ol) the width of the material strip 4 in dependence on the Bandkoor ⁇ dinate s, which would generate a rolling mill 1, which has only the first two rolling stands 2.1 and 2.2 and the first loop lifter 3.1.
- nip 6 of the second Walzge ⁇ roughing stand 2.2 of strip tension ol on the material strip 4 is effective from the date on which the front belt portion of the length sl ⁇ sen nip has passed 6, and until the first Schlingenhe- about 3.1 when running-out of the material strip 4 is lowered.
- FIG. 4 shows the influence of a strip tension o2 produced by the second loop lifter 3.2 on the width of the material strip 4 in a rolling method according to the prior art.
- the first diagram in figure 4 shows the tape tension o2 in the material strip 4 at a position of the rolling mill 1 in which two ⁇ th intermediate framework region 9.2. Analogous to the strip tension ol also acts the strip tension o2 until the belt coordinate sl and up to a belt coordinate s6 ', the distance d s7 to Bandkoordina ⁇ te? of the belt foot 4.2 has, on the material strip 4, since the second loop lifter 3.2 ge ⁇ drive only on the material strip 4, after a front band portion of length sl has passed the nip 6 of the third rolling stand 2.3, and is lowered before a band section the length d at the end of the material strip 4 has passed this nip 6.
- the band coordinates s6 'and s7? correspond to the band coordinates s6 and s7 in Figure 3, but differ from these, since the material strip 4 has already been extended by the action of the roll nip 6 of the second stand 2.2.
- the band coordinates s2 and s5 of FIG. 3 now correspond to band coordinates s2. and s5 ?.
- the band section whose ends had the band coordinates sl and s2 in FIG. 3 now has ends with the band coordinates sl and s2? and a length of approximately LS (1, 2) ⁇ hl / h2, since this Bandab ⁇ section was extended by the nip 6 of the second rolling stand 2.2 approximately in the ratio hl / h2.
- the band section whose ends had the band coordinates s5 and s6 in FIG. 3 now has ends with the band coordinates s5? and s6? and also a length of approximately LS (1, 2) ⁇ hl / h2.
- the second diagram of FIG. 4 shows the width b20 of the material band 4 at a position in front of the second rolling stand 2.2 as a function of the band coordinate s.
- the width b20 corresponds to the width b2 (ol) in Figure 3, taking into ⁇ account the extension of the material strip 4.
- the third diagram of figure 4 shows the width by the strip tension ol and o2 generated b2 (ol, o2) of the material strip 4 in the nip 6 of the second rolling stand 2.2 in dependence on the band coordinate s.
- the fourth diagram of FIG. 4 shows a width b3 (ol, o2) of the material strip 4 in the nip 6 of the third roll stand 2.3 generated by the strip tension ol and o2 in dependence on the strip coordinate s.
- This width b3 (ol, o2) is the
- the nip 6 of the third roll stand 2.3 of the strip tension o2 affects the Materi ⁇ alband 4 from the time at which sl, the front tape portion of the length of this nip has passed through 6, and through the second loop lifter 3.2 during unthreading of the material strip 4 is lowered.
- the other loop lifters 3.3 to 3.6 influence the width of the material strip 4 in the rolling method according to the prior art.
- the material band 4 After passing through the rolling train 1, the material band 4 has a stepped width in this method at its front end and at its rear end.
- FIG. 5 shows the influence of a strip tension o2 produced by the second loop lifter 3.2 on the width of the material strip 4 in a rolling method according to the invention.
- the first loop lifter 3.1 appears as in Figure 3 means that the first loop lifter 3.1 rialband the Mate 4, which has a constant width bO initially Zvi ⁇ rule the band coordinates sl and s6 a constant strip tension ol exerts.
- the second loop lifter 3.2 exercises between the band coordinates sl and s6. no constant strip tension o2 on the material strip 4. Instead, the strip tension is o2 in a front band end Zvi ⁇ rule the band coordinate sl and s4 and in a rear band end between the belt coordinate s9 and s6? opposite to the one lying between these band end sections
- the second diagram of Figure 5 shows the width b20 of the Ma ⁇ terialbandes 4 at a position upstream of the second roll stand 2.2 depending on the belt coordinate s. This width b20 runs along the material strip 4 as in the second diagram of FIG. 4, since the strip tension ol runs as in FIG.
- the band-tension change ⁇ 2 and the band coordinates s4 and s9 are selected such that they have a width difference Ab20 between the width of the material band 4 in the band section between the band coordinates s3 and s2? and the width of the material band 4 in the band section between the Bandko ⁇ ordinaten s2? and s5? eliminated.
- the strip tension change ⁇ 2 also eliminates the width difference Ab20 between the width of the material band 4 in the band section between the band coordinates s5? and s8? and the width of the material strip 4 in
- FIG. 6 shows diagrammatically how the belt hoops ⁇ to o6 are adapted according to the invention by means of a material tracking model 10 and a belt model 11.
- Materialverfol ⁇ supply model 10 the material strip 4 is divided into a number of belt sections and there will be a momentary Posi ⁇ tion, a current length and an instantaneous width of each of these strip sections in the rolling train 1 pursued.
- Such variables can be example ⁇ example:
- the strip tension ⁇ changes ⁇ to ⁇ 6 are determined as output values O by means of the belt model 11, which are then generated along the material strip 4 of the loop levers 3.1 to 3.6 with the strip tension control.
- 11 Sensitivities Si are used by the band model representing a dependency Aoi / from a change in width from the material strip 4 from a Bandzug forung ⁇ beschrei ⁇ ben and for the rolling mill 1 and the respective band of material 4 in advance, depending on relevant factors such as a temperature, width and thickness of the material band 4 ermit ⁇ telt and stored, for example, in the form of a corresponding characteristic field.
- a sensitivity Si is of a width difference Abio bi between the current widths (ol, oi-l) of the material ⁇ band 4 of a band end and a respective benachbar ⁇ th band portion then determines the appropriate Bandzug Sung Aoi and the strip tension übermit- telt additional setpoint.
- the strip tension change Ao2 shown in the first diagram of FIG. 5 is determined by means of the corresponding sensitivity S2 from the width difference Ab20 shown in the second diagram of FIG. 5 in accordance with S2 »Ab20.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13713773.3A EP2830788B1 (de) | 2012-03-28 | 2013-03-19 | Verfahren zum walzen eines materialbandes |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP12161767.4A EP2644289A1 (de) | 2012-03-28 | 2012-03-28 | Verfahren zum Walzen eines Materialbandes |
| PCT/EP2013/055656 WO2013143914A1 (de) | 2012-03-28 | 2013-03-19 | Verfahren zum walzen eines materialbandes |
| EP13713773.3A EP2830788B1 (de) | 2012-03-28 | 2013-03-19 | Verfahren zum walzen eines materialbandes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2830788A1 true EP2830788A1 (de) | 2015-02-04 |
| EP2830788B1 EP2830788B1 (de) | 2016-03-02 |
Family
ID=48045428
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12161767.4A Withdrawn EP2644289A1 (de) | 2012-03-28 | 2012-03-28 | Verfahren zum Walzen eines Materialbandes |
| EP13713773.3A Active EP2830788B1 (de) | 2012-03-28 | 2013-03-19 | Verfahren zum walzen eines materialbandes |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12161767.4A Withdrawn EP2644289A1 (de) | 2012-03-28 | 2012-03-28 | Verfahren zum Walzen eines Materialbandes |
Country Status (4)
| Country | Link |
|---|---|
| EP (2) | EP2644289A1 (de) |
| CN (1) | CN104203439B (de) |
| IN (1) | IN2014KN01708A (de) |
| WO (1) | WO2013143914A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0636929B2 (ja) * | 1986-07-02 | 1994-05-18 | 川崎製鉄株式会社 | 被圧延材の板幅制御方法 |
| JPH01258807A (ja) * | 1988-04-05 | 1989-10-16 | Sumitomo Metal Ind Ltd | タンデムミルにおける板幅制御方法 |
| JPH01293914A (ja) * | 1988-05-20 | 1989-11-27 | Mitsubishi Electric Corp | 圧延機制御装置 |
| JPH04100620A (ja) * | 1990-08-16 | 1992-04-02 | Sumitomo Metal Ind Ltd | 熱間連続圧延における板巾制御法 |
| JP2000312909A (ja) * | 1999-04-27 | 2000-11-14 | Toshiba Corp | 板幅制御装置 |
| JP5587825B2 (ja) * | 2011-05-11 | 2014-09-10 | 株式会社日立製作所 | 熱間圧延機の張力制御装置および制御方法 |
-
2012
- 2012-03-28 EP EP12161767.4A patent/EP2644289A1/de not_active Withdrawn
-
2013
- 2013-03-19 CN CN201380016664.0A patent/CN104203439B/zh active Active
- 2013-03-19 EP EP13713773.3A patent/EP2830788B1/de active Active
- 2013-03-19 IN IN1708KON2014 patent/IN2014KN01708A/en unknown
- 2013-03-19 WO PCT/EP2013/055656 patent/WO2013143914A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013143914A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013143914A1 (de) | 2013-10-03 |
| CN104203439B (zh) | 2017-04-05 |
| IN2014KN01708A (de) | 2015-10-23 |
| CN104203439A (zh) | 2014-12-10 |
| EP2644289A1 (de) | 2013-10-02 |
| EP2830788B1 (de) | 2016-03-02 |
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